# This file is deprecated as per GLEP 56 in favor of metadata.xml. Please add
# your descriptions to your package's metadata.xml ONLY.
# * generated automatically using egencache *

app-accessibility/brltty:api - build brltty's application program interface
app-accessibility/brltty:beeper - support the console tone generator
app-accessibility/brltty:contracted-braille - support in-line contracted braille
app-accessibility/brltty:fm - support for the sound card synthesizer
app-accessibility/brltty:learn-mode - support for interactive command learn mode
app-accessibility/brltty:midi - support the musical instrument digital interface
app-accessibility/brltty:pcm - support for sound card digital audio
app-accessibility/brltty:speech - speech support
app-accessibility/eflite:16k_voice - Use a higher-quality voice.
app-accessibility/emacspeak:espeak - Adds support for the espeak tts engine
app-accessibility/festival-it:mbrola - Adds support for mbrola voices
app-accessibility/freetts:jsapi - build Java Speech API (JSAPI)
app-accessibility/freetts:mbrola - Adds support for mbrola voices
app-accessibility/gnome-speech:espeak - Adds support for the espeak speech driver (default)
app-accessibility/gnome-speech:festival - Adds support for the festival speech driver
app-accessibility/simon:kdepim - Use kde-base/kdepimlibs
app-accessibility/simon:opencv - Use media-libs/opencv
app-accessibility/simon:sphinx - Build sphinx backend (pulls app-accessibility/julius if disabled
app-accessibility/speech-dispatcher:espeak - Adds support for espeak speech engine
app-accessibility/speech-dispatcher:flite - Adds support for flite speech engine
app-accessibility/speechd-el:brltty - brltty support
app-admin/bcfg2:cheetah - Include dev-python/cheetah support
app-admin/bcfg2:genshi - Include dev-python/genshi support
app-admin/bcfg2:server - Installs scripts to be used on the server-side of this app
app-admin/collectd:collectd_plugins_aggregation - Build the aggregation plugin (aggregate multiplte values into a single value)
app-admin/collectd:collectd_plugins_apache - Build the apache input plugin (transferred bytes, handled requests, detailed scoreboard statistics)
app-admin/collectd:collectd_plugins_apcups - Build the apcups input plugin (UPS charge, load, input/output/battery voltage, etc.)
app-admin/collectd:collectd_plugins_ascent - Build the ascent input plugin (statistics about a free server for World of Warcraft)
app-admin/collectd:collectd_plugins_battery - Build the battery input plugin (charge, current and voltage of ACPI and PMU based laptop batteries)
app-admin/collectd:collectd_plugins_bind - Build the bind input plugin (name server and resolver statistics)
app-admin/collectd:collectd_plugins_cgroups - Build the cgroups CPU accounting collection plugin
app-admin/collectd:collectd_plugins_conntrack - Build the conntrack input plugin (number of nf_conntrack entries)
app-admin/collectd:collectd_plugins_contextswitch - Build the contextswitch input plugin (number of context switches done by the operating system)
app-admin/collectd:collectd_plugins_cpu - Build the cpu input plugin (time spent in the system, user, nice, idle, and related states)
app-admin/collectd:collectd_plugins_cpufreq - Build the cpufreq input plugin (CPU frequency, for laptops with speedstep or similar)
app-admin/collectd:collectd_plugins_csv - Build the csv output plugin (write to comma separated values (CSV) files)
app-admin/collectd:collectd_plugins_curl - Build the curl input plugin (parse statistics from websites using regular expressions)
app-admin/collectd:collectd_plugins_curl_json - Build the curl_json input plugin (get json data via curl and parse it)
app-admin/collectd:collectd_plugins_curl_xml - Build the curl_xml input plugin (get xml data via curl and parse it)
app-admin/collectd:collectd_plugins_dbi - Build the dbi input plugin (execute SQL statements on databases and interpret the reply)
app-admin/collectd:collectd_plugins_df - Build the df input plugin (mountpoint usage)
app-admin/collectd:collectd_plugins_disk - Build the disk input plugin (sectors read/written, number of read/write actions, average completion time of IO-operations)
app-admin/collectd:collectd_plugins_dns - Build the dns input plugin (collects statistics of your DNS traffic on port udp/53)
app-admin/collectd:collectd_plugins_email - Build the email input plugin (opens a UNIX domain socket and starts accepting connections on that socket)
app-admin/collectd:collectd_plugins_entropy - Build the entropy input plugin (available entropy on a system)
app-admin/collectd:collectd_plugins_ethstat - Build the ethstat input plugin (performance statistics of Linux ethernet cards)
app-admin/collectd:collectd_plugins_exec - Build the exec input/output plugin (executes scripts / applications and reads values back)
app-admin/collectd:collectd_plugins_filecount - Build the filecount input plugin (countd the number of files in a directory and all its subdirectories)
app-admin/collectd:collectd_plugins_fscache - Build the fscache input plugin (information about the caching infrastructure for network file-systems etc)
app-admin/collectd:collectd_plugins_gmond - Build the gmond input plugin (receive data from gmond, the client daemon of the Ganglia project)
app-admin/collectd:collectd_plugins_hddtemp - Build the hddtemp input plugin (temperature of hard disks)
app-admin/collectd:collectd_plugins_interface - Build the interface input plugin (information about traffic, packets and errors of interfaces)
app-admin/collectd:collectd_plugins_ipmi - Build the ipmi input plugin (read hardware sensors from servers using the Intelligent Platform Management Interface (IPMI))
app-admin/collectd:collectd_plugins_iptables - Build the iptables input plugin (statistics from a ip_tables based packet filter)
app-admin/collectd:collectd_plugins_irq - Build the irq input plugin (number of times each interrupt has been handled by the os)
app-admin/collectd:collectd_plugins_java - Build the java input plugin (embeds a JVM into collectd for writing plugins)
app-admin/collectd:collectd_plugins_libvirt - Build the libvirt input plugin (statistics about virtualized guests on a system)
app-admin/collectd:collectd_plugins_load - Build the load input plugin (system load)
app-admin/collectd:collectd_plugins_logfile - Build the logfile output plugin (writes log messages to a text file)
app-admin/collectd:collectd_plugins_lvm - Build the LVM input plugin
app-admin/collectd:collectd_plugins_madwifi - Build the madwifi input plugin (information about Atheros wireless LAN chipsets)
app-admin/collectd:collectd_plugins_match_empty_counter - Build the match_empty_counter filter plugin
app-admin/collectd:collectd_plugins_match_hashed - Build the match_hashed filter plugin
app-admin/collectd:collectd_plugins_match_regex - Build the match_regex filter plugin
app-admin/collectd:collectd_plugins_match_timediff - Build the match_timediff filter plugin
app-admin/collectd:collectd_plugins_match_value - Build the match_value filter plugin
app-admin/collectd:collectd_plugins_mbmon - Build the mbmon input plugin (information from mainboard sensors)
app-admin/collectd:collectd_plugins_md - Build the md input plugin (disk states in Linux md devices)
app-admin/collectd:collectd_plugins_memcachec - Build the memcachec input plugin (connects to a memcached server)
app-admin/collectd:collectd_plugins_memcached - Build the memcached input plugin (connects to a memcached daemon)
app-admin/collectd:collectd_plugins_memory - Build the memory input plugin (physical memory utilization)
app-admin/collectd:collectd_plugins_multimeter - Build the multimeter input plugin (reads a voltage or current from a multimeter connected to a serial bus)
app-admin/collectd:collectd_plugins_mysql - Build the mysql input plugin (connects to an MySQL-database and issues a SHOW STATUS command)
app-admin/collectd:collectd_plugins_netlink - Build the netlink input plugin (opens a netlink socket to the Linux kernel for getting statistics)
app-admin/collectd:collectd_plugins_network - Build the network input/output plugin (communicates with other instances of collectd)
app-admin/collectd:collectd_plugins_nfs - Build the nfs input plugin (usage of the Network File System)
app-admin/collectd:collectd_plugins_nginx - Build the nginx input plugin (number of requests handled by the nginx daemon)
app-admin/collectd:collectd_plugins_notify_desktop - Build the notify_desktop output plugin (uses libnotify to display notifications to the user)
app-admin/collectd:collectd_plugins_notify_email - Build the notify_email output plugin (uses libESMTP to send notifications to a configured email address)
app-admin/collectd:collectd_plugins_ntpd - Build the ntpd input plugin (queries an NTP server)
app-admin/collectd:collectd_plugins_numa - Build the numa input plugin (statistics of the Linux Non-Uniform Memory Access (NUMA) subsystem)
app-admin/collectd:collectd_plugins_nut - Build the nut input plugin (collects UPS statistics using the Network UPS Tools)
app-admin/collectd:collectd_plugins_olsrd - Build the olsrd input plugin (reads information about the Optimized Link State Routing daemon)
app-admin/collectd:collectd_plugins_onewire - Build the onewire input plugin (collects temperature information from sensors)
app-admin/collectd:collectd_plugins_openvpn - Build the openvpn input plugin (reads the status file printed by OpenVPN)
app-admin/collectd:collectd_plugins_oracle - Build the oracle input plugin (SQL-queries one or more Oracle database systems)
app-admin/collectd:collectd_plugins_perl - Build the perl language binding plugin (embeds a Perl interpreter into collectd for writing plugins)
app-admin/collectd:collectd_plugins_ping - Build the ping input plugin (measures network latency)
app-admin/collectd:collectd_plugins_postgresql - Build the postgresql input plugin (connects to and executes SQL statements on a PostgreSQL database)
app-admin/collectd:collectd_plugins_powerdns - Build the powerdns input plugin (connects to a local PowerDNS instance)
app-admin/collectd:collectd_plugins_processes - Build the processes input plugin (statistics about processes)
app-admin/collectd:collectd_plugins_protocols - Build the protocols input plugin (network protocols)
app-admin/collectd:collectd_plugins_python - Build the python language binding plugin (embeds a Python interpreter into collectd for writing plugins)
app-admin/collectd:collectd_plugins_routeros - Build the routeros input plugin (collect information on devices running RouterOS)
app-admin/collectd:collectd_plugins_rrdcached - Build the rrdcached input/output plugin (connects to rrdcached and submits updates for RRD files)
app-admin/collectd:collectd_plugins_rrdtool - Build the rrdtool output plugin (writes values to RRD-files)
app-admin/collectd:collectd_plugins_sensors - Build the sensors input plugin (uses lm-sensors to read hardware sensors)
app-admin/collectd:collectd_plugins_serial - Build the serial input plugin (collects the traffic on serial interfaces)
app-admin/collectd:collectd_plugins_snmp - Build the snmp input plugin (read values from network devices using SNMP)
app-admin/collectd:collectd_plugins_statsd - Build the statsd input plugin (accepts statsd-type metrics from a UDP socket)
app-admin/collectd:collectd_plugins_swap - Build the swap input plugin (amount of memory currently written to swap)
app-admin/collectd:collectd_plugins_syslog - Build the syslog output plugin (receives messages from collectd and dispatches them to syslog)
app-admin/collectd:collectd_plugins_table - Build the table input plugin (parses table-like structured plain text)
app-admin/collectd:collectd_plugins_tail - Build the tail input plugin (follows logfiles as e.g. tail -f)
app-admin/collectd:collectd_plugins_target_notification - Build the target_notification filter plugin
app-admin/collectd:collectd_plugins_target_replace - Build the target_replace filter plugin
app-admin/collectd:collectd_plugins_target_scale - Build the target_scale filter plugin
app-admin/collectd:collectd_plugins_target_set - Build the target_set filter plugin
app-admin/collectd:collectd_plugins_tcpconns - Build the tcpconns input plugin (number of TCP connections to or from a specified port)
app-admin/collectd:collectd_plugins_teamspeak2 - Build the teamspeak2 input plugin (collects traffic statistics from a teamspeak2 instance)
app-admin/collectd:collectd_plugins_ted - Build the ted input plugin (connects to The Energy Detective and reads the current power over connected power lines)
app-admin/collectd:collectd_plugins_thermal - Build the thermal input plugin (ACPI thermal zone information)
app-admin/collectd:collectd_plugins_threshold - Build the threshold plugin (checks values against configured thresholds and creates notifications if values are out of bounds)
app-admin/collectd:collectd_plugins_tokyotyrant - Build the tokyotyrant input plugin (number of records and file size from a running Tokyo Tyrant server)
app-admin/collectd:collectd_plugins_unixsock - Build the unixsock output plugin (opens a UNIX domain socket and accepts connections)
app-admin/collectd:collectd_plugins_uptime - Build the uptime input plugin (system uptime)
app-admin/collectd:collectd_plugins_users - Build the users input plugin (number of users currently logged in)
app-admin/collectd:collectd_plugins_uuid - Build the uuid plugin (tries hard to determine the UUID of the system it is running on)
app-admin/collectd:collectd_plugins_varnish - Build the varnish input plugin
app-admin/collectd:collectd_plugins_vmem - Build the vmem input plugin (information about the virtual memory subsystem)
app-admin/collectd:collectd_plugins_vserver - Build the vserver input plugin (virtual servers running on a system)
app-admin/collectd:collectd_plugins_wireless - Build the wireless input plugin (signal quality, signal power and signal-to-noise ratio for wireless LAN cards)
app-admin/collectd:collectd_plugins_write_graphite - Build the write_graphite output plugin (sends the values collected by collectd to Carbon, the storage layer of the Graphite time-series database)
app-admin/collectd:collectd_plugins_write_http - Build the write_http output plugin (sends the values collected by collectd to a web-server)
app-admin/collectd:collectd_plugins_write_mongodb - Build the write_mongodb output plugin (sends the values collected by collectd to a MongoDB)
app-admin/collectd:contrib - Install user-contributed files in the doc directory
app-admin/conky:apcupsd - enable support for sys-power/apcupsd
app-admin/conky:audacious - enable monitoring of music played by media-sound/audacious
app-admin/conky:eve - enable support for the eve-online skill monitor
app-admin/conky:iostats - enable support for per-task I/O statistics
app-admin/conky:lua - enable if you want Lua scripting support
app-admin/conky:lua-cairo - enable if you want Lua Cairo bindings for Conky (also enables lua support)
app-admin/conky:lua-imlib - enable if you want Lua Imlib2 bindings for Conky (also enables lua and imlib support)
app-admin/conky:math - enable support for glibc's libm math library
app-admin/conky:moc - enable monitoring of music played by media-sound/moc
app-admin/conky:mpd - enable monitoring of music controlled by media-sound/mpd
app-admin/conky:nano-syntax - enable syntax highlighting for app-editors/nano
app-admin/conky:nvidia - enable reading of nvidia card temperature sensors via media-video/nvidia-settings
app-admin/conky:portmon - enable support for tcp (ip4) port monitoring
app-admin/conky:thinkpad - enable support for IBM/Lenovo notebooks
app-admin/conky:weather-metar - enable support for metar weather service
app-admin/conky:weather-xoap - enable support for metar and xoap weather service
app-admin/conky:xmms2 - enable monitoring of music played by media-sound/xmms2
app-admin/diradm:automount - Support for automount data in LDAP
app-admin/diradm:irixpasswd - Support for storing separate IRIX passwords
app-admin/elektra:gcov - Enable coverage support
app-admin/elektra:simpleini - Enable simpleini support
app-admin/elektra:yajl - Enable yajl support
app-admin/eselect-php:fpm - Enable the FastCGI Process Manager SAPI
app-admin/gkrellm:X - Build both the X11 gui (gkrellm) and the server (gkrellmd). Disabling this flag builds the server only.
app-admin/gkrellm:gnutls - Enable SSL support for mail checking with net-libs/gnutls (overrides 'ssl' USE flag)
app-admin/gkrellm:hddtemp - Enable monitoring harddrive temperatures via app-admin/hddtemp
app-admin/gkrellm:lm_sensors - Enable monitoring sensors via sys-apps/lm_sensors
app-admin/gkrellm:ntlm - Enable NTLM authentication for mail checking with net-libs/libntlm
app-admin/gkrellm:ssl - Enable SSL support for mail checking with dev-libs/openssl
app-admin/glance:swift - Adds swift storage support
app-admin/gnome-system-tools:nfs - Adds support for NFS shares
app-admin/hddtemp:network-cron - Monthly cronjob to update hddtemp.db.
app-admin/keepass:aot - Generate native code at build time, rather than runtime.
app-admin/lcap:lids - If you have the Linux Intrusion Detection System
app-admin/logrotate:acl - Installs acl support
app-admin/logrotate:selinux - Installs Security Enhanced Linux support
app-admin/mate-system-tools:caja - Adds support for the Caja file manager
app-admin/mate-system-tools:nfs - Adds support for NFS shares
app-admin/matter:entropy - Add Entropy support
app-admin/mcollective:client - Install client utilities
app-admin/openrc-settingsd:systemd - Use the versions of dbus and polkit files provided by sys-apps/systemd
app-admin/packagekit-base:command-not-found - Enable packagekit support on shell "command not found"
app-admin/packagekit-base:cron - Install cron script for auto-update
app-admin/packagekit-base:entropy - Enable Entropy backend
app-admin/packagekit-base:introspection - Use dev-libs/gobject-introspection Enable introspection
app-admin/packagekit-base:pm-utils - Add pm-utils (suspend/resume) functionalities
app-admin/pass:X - Use x11-misc/xclip to copy passwords to the clipboard.
app-admin/pass:fish-completion - Enable fish completion support.
app-admin/pass:git - Use dev-vcs/git for password revisions.
app-admin/puppet:augeas - Enable augeas support
app-admin/puppet:diff - Enable diff support
app-admin/puppet:rrdtool - Enable rrdtool support
app-admin/puppet:shadow - Enable shadow support
app-admin/rsyslog:extras - Add support for the UDP spoofing module (omudpspoof) using net-libs/libnet
app-admin/rsyslog:mongodb - Add support for the MongoDB output template module using dev-libs/libmongo-client
app-admin/rsyslog:relp - Add support for the Reliable Event Logging Protocol using dev-libs/librelp
app-admin/rsyslog:zeromq - Add support for the ZeroMQ input and output plugins using net-libs/zeromq
app-admin/sagan:libdnet - Add support for dev-libs/libdnet
app-admin/sagan:lognorm - Add support for log/rules normalizations via dev-libs/liblognorm
app-admin/sagan:pcap - Add support for network packet capture via net-libs/libpcap
app-admin/sagan:smtp - Build witch SMTP (E-Mail) support
app-admin/sagan:snort - Add support to interact with Snort IDE using net-analyzer/snortsam'
app-admin/sagan-rules:lognorm - Install normalize rules support with dev-libs/liblognorm
app-admin/salt:libcloud - Enable salt-cloud support via libcloud.
app-admin/salt:libvirt - Support managing virtual machines with app-emulation/libvirt.
app-admin/salt:mako - Add support for using the mako template engine for parsing salt states.
app-admin/salt:mongodb - Support returning data to a mongodb server.
app-admin/salt:openssl - Add support for using TLS via OpenSSL.
app-admin/salt:redis - Support returning data to a redis database.
app-admin/salt:timelib - Use timelib to parse english textual date descriptions.
app-admin/sshguard:ipfilter - Enable ipfilter firewall support (only for *bsd)
app-admin/sudo:offensive - Let sudo print insults when the user types the wrong password.
app-admin/sudo:sendmail - Allow sudo to send emails with sendmail.
app-admin/sysklogd:logrotate - use app-admin/logrotate for rotating logs rather than custom cron scripts
app-admin/syslog-ng:json - Enable support for JSON template formatting via dev-libs/json-glib
app-admin/syslog-ng:mongodb - Enable support for mongodb destinations
app-admin/syslog-ng:smtp - Enable support for SMTP destinations
app-admin/syslog-ng:spoof-source - Enable support for spoofed source addresses
app-admin/sysstat:cron - Install /etc/cron.d script to periodically run sar
app-admin/sysstat:isag - Install isag, the Interactive System Activity Graph tool
app-admin/testdisk:ntfs - Include the ability to read NTFS filesystems
app-admin/testdisk:reiserfs - include reiserfs reading ability
app-admin/tripwire:ssl - Adds support for Secure Socket Layer connections
app-admin/tripwire:static - Builds the package statically
app-admin/tripwire:tools - Installs app-admin/mktwpol, providing scripts for the installation/setup of tripwire, including generating the tripwire policy file and maintenance of the tripwire database
app-admin/ulogd:mysql - Build MySQL output plugin to save packets in a mysql database.
app-admin/ulogd:nfacct - Build NFACCT input plugin to support traffic accounting via nfnetlink_acct.
app-admin/ulogd:nfct - Build NFCT input plugin to support stateful flow-based via nf_conntrack_netlink.
app-admin/ulogd:nflog - Build NFLOG input plugin to support stateless packet-based logging via nfnetlink_queue.
app-admin/ulogd:pcap - Build PCAP output plugin to save packets in libpcap file format.
app-admin/ulogd:postgres - Build PGSQL output plugin to save packets in a postgres database.
app-admin/ulogd:sqlite - Build SQLITE3 output plugin to save packets in a sqlite database.
app-admin/webalizer:xtended - Include the 404 extension
app-admin/webapp-config:portage - Propagete python_targets dependencies to sys-apps/portage
app-admin/yaala:storable - Support for persistence of Perl data structures.
app-antivirus/clamav:clamdtop - A Top like tool which shows what clamd is currently scanning amongst other things
app-arch/cabextract:extra-tools - Install experimental tools: wince_info and wince_rename for examining and processing Windows CE installation cabinet header files; cabinfo for examining the structure of a cab file.
app-arch/cfv:bittorrent - Enable support for checking .torrent files
app-arch/dpkg:dselect - Build the dselect package-management frontend
app-arch/dpkg:update-alternatives - Install update-alternatives
app-arch/dump:ermt - encrypted rmt support
app-arch/file-roller:nautilus - Enable file-roller to integrate with gnome-base/nautilus by providing entries in its context menu
app-arch/file-roller:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
app-arch/gzip:pic - disable optimized assembly code that is not PIC friendly
app-arch/innoextract:c++0x - Build ROOT using the C++11 standard.
app-arch/libarchive:bzip2 - Allow accessing bzip2-compressed archives through libbz2 (which comes with app-arch/bzip2). This only affects libarchive's native support: bsdtar will keep using bunzip2 as a filter if that's not built-in.
app-arch/libarchive:e2fsprogs - Use file flags from sys-fs/e2fsprogs headers instead of virtual/os-headers headers
app-arch/libarchive:nettle - Use dev-libs/nettle as crypto backend
app-arch/libarchive:zlib - Allow accessing gzip-compressed archives through sys-libs/zlib. This only affects libarchive's native support: bsdtar will keep using gunzip as a filter if that's not built-in. It's also needed for supporting extraction of ZIP files.
app-arch/libzpaq:jit - Enable just-in-time compilation for faster compression (requires SSE2)
app-arch/mate-file-archiver:caja - Enable engrampa to integrate with mate-base/mate-file-manager by providing entries in its context menu
app-arch/p7zip:rar - Enable support for non-free rar decoder
app-arch/pbzip2:symlink - Install symlinks which override app-arch/bzip2 implementation
app-arch/rar:all_sfx - Install all SFX (Self-Extracting) files rather than just the native format (allows creation of Windows EXEs on Linux ELF systems)
app-arch/rpm5:augeas - Add support for configuration files changing (app-admin/augeas)
app-arch/rpm5:keyutils - Enable for the keyring ccache using keyutils.
app-arch/rpm5:magic - Add magic file support (sys-apps/file)
app-arch/rpm5:nss - Build support for ssl/crypto handling using dev-libs/nss
app-arch/rpm5:openssl - Build support for ssl/crypto handling using dev-libs/openssl
app-arch/rpm5:pkcs11 - Build token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.
app-arch/rpm5:uuid - Enable server side UUID generation (via dev-libs/ossp-uuid)
app-arch/rpm5:webdav-neon - Include support for net-libs/neon
app-arch/rpm5:xar - Build support for xar archives using app-arch/xar
app-arch/tar:minimal - just install `tar`
app-arch/unzip:natspec - Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
app-arch/zip:natspec - Use dev-libs/libnatspec to correctly decode non-ascii file names archived in Windows.
app-backup/amanda:s3 - Support for backing up to the Amazon S3 system
app-backup/amanda:xfs - Support for backing up raw XFS filesystems using xfsdump
app-backup/backup-manager:s3 - Support for backing up to the Amazon S3 system
app-backup/bacula:bacula-clientonly - Disable DB support, and just build a client
app-backup/bacula:bacula-nodir - Disable building of director
app-backup/bacula:bacula-nosd - Disable building of storage daemon
app-backup/bacula:logwatch - Install support files for logwatch
app-backup/bareos:clientonly - Only install file-daemon (client)
app-backup/bareos:director - Install director
app-backup/bareos:logwatch - Install support files for logwatch
app-backup/bareos:ndmp - Enable support for NDMP (Network Data Management Protocol)
app-backup/bareos:scsi-crypto - Enable low level SCSI crypto support
app-backup/bareos:sql-pooling - Enable SQL pooling support
app-backup/bareos:storage-daemon - Install storage daemon (bareos-sd)
app-backup/boxbackup:client-only - Disable server support, and just build a client
app-backup/dar:dar32 - Enables --enable-mode=32 option, which replace infinite by 32 bit integers
app-backup/dar:dar64 - Enables --enable-mode=64 option, which replace infinite by 64 bit integers
app-backup/dar:gcrypt - Enables strong encryption support
app-backup/deja-dup:nautilus - Build gnome-base/nautilus extension
app-backup/duplicity:s3 - Support for backing up to the Amazon S3 system
app-backup/rear:udev - Have ReaR start backup when attaching your USB drive.
app-backup/spideroak-bin:headless - Build without graphic frontend
app-backup/tsm:hsm - Installs Tivoli Storage Manager for Space Management
app-backup/tsm:tsm_cit - IBM Tivoli Common Inventory Technology
app-backup/tsm:tsm_hw - Difference snapshot support for NetApp and N-Series file servers
app-benchmarks/jmeter:beanshell - Enable BeanShell scripting support
app-benchmarks/ltp:expect - Build against the expect library for interactive testing
app-benchmarks/ltp:open-posix - Build and install the POSIX testsuite
app-benchmarks/ltp:pm - Build and install the power management testsuite
app-benchmarks/ltp:rt - Build and install the realtime testsuite
app-benchmarks/ramspeed:pic - Force shared libraries to be built as PIC (this is slower)
app-benchmarks/sysbench:aio - Enable libaio support
app-cdr/backlite:mplayer - Add support for mplayer preview in addition to X11 and phonon
app-cdr/brasero:libburn - Enable dev-libs/libburn backend
app-cdr/brasero:nautilus - Build the gnome-base/nautilus extension
app-cdr/brasero:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
app-cdr/brasero:playlist - Enable support for playlists through dev-libs/totem-pl-parser
app-cdr/brasero:tracker - Enable audio playlist search using the app-misc/tracker indexer
app-cdr/cdemu:cdemu-daemon - Pull app-cdr/cdemu-daemon dependency, useful in chroot environment (bug #315491). Do not disable until you know what you are doing.
app-cdr/cdrdao:gcdmaster - Enable building of gcdmaster application
app-cdr/cdrkit:hfs - Provide building of HFS (Apple) CD-images
app-cdr/cuetools:extras - Install additional script that tag files based on cue/toc file information
app-cdr/disc-cover:cdrom - Enable audio CD support. This is not needed to make www-apps/disc-cover work.
app-cdr/gaffitter:scripts - Install additional gaffitter scripts for external programs
app-cdr/k3b:emovix - Enable burning support for eMoviX images
app-cdr/mirage2iso:pinentry - Support app-crypt/pinentry password input backend.
app-cdr/mybashburn:normalize - Add support for normalizing audio file volume levels
app-crypt/ccid:twinserial - Enable twinserial reader
app-crypt/codecrypt:cryptopp - Build algorithms that need Crypto++ support dev-libs/crypto++
app-crypt/eid-mw:gtk - Enable the dialog pages, by using x11-libs/gtk+:2
app-crypt/eid-mw:xpi - Build and install an extension for Mozilla browsers.
app-crypt/ekeyd:minimal - Only install the ekey-egd-linux service rather than the full ekeyd package.
app-crypt/ekeyd:munin - Install a plugin for net-analyzer/munin to graph statistical data from ekeyd.
app-crypt/ekeyd:usb - Build the libusb-based userland daemon for accessing the EntropyKey (alternative to the CDC USB driver). It is suggested to use this option by default, as the CDC driver in the kernel often seems to be fragile (or the gadget implementation on the EntropyKey is too buggy), and can cause various problems.
app-crypt/gnupg:mta - Build mta support using virtual/mta.
app-crypt/gnupg:smartcard - Build scdaemon software. Enables usage of OpenPGP cards. For other type of smartcards, try app-crypt/gnupg-pkcs11-scd.
app-crypt/gnupg:usb - Build direct CCID access for scdaemon; requires dev-libs/libusb.
app-crypt/gpgme:common-lisp - Install common-lisp files
app-crypt/gpgme:pth - Enable support for GNU Portable Threads multithreading library
app-crypt/hashcat-gui:cuda - Install oclhashcat-{plus,lite}-bin to take advantage of hardware cuda support.
app-crypt/hashcat-gui:opencl - Install oclhashcat-{plus,lite}-bin to take advantage of hardware opencl support.
app-crypt/heimdal:hdb-ldap - Adds support for LDAP as a database backend
app-crypt/heimdal:otp - Adds support for one-time passwords
app-crypt/heimdal:pkinit - Adds support for PKINIT for the initial ticket
app-crypt/johntheripper:cuda - Use nvidia cuda toolkit for speeding up cracking on capable devices
app-crypt/johntheripper:mozilla - Support mozilla password cracking
app-crypt/johntheripper:opencl - Enable opencl support for speeding up cracking on capable devices
app-crypt/kstart:afs - Enables afs support which means you can acquire an afs token and set PAGs. It's recommended to set this USE if you need authenticated access to an AFS cell for your daemon/app.
app-crypt/libsecret:vala - Enable bindings for dev-lang/vala
app-crypt/mit-krb5:doc - Creates and installs the API and implementation documentation. This is only useful if you want to develop software which depends on kerberos.
app-crypt/mit-krb5:keyutils - Enable for the keyring ccache using keyutils.
app-crypt/mit-krb5:openldap - Enable support for ldap as a database backend.
app-crypt/mit-krb5:pkinit - Enable pkinit support for the initial ticket.
app-crypt/oclhashcat-lite-bin:virtualcl - Support for Mosix VirtualCL Clustering Platform
app-crypt/oclhashcat-plus-bin:virtualcl - Support for Mosix VirtualCL Clustering Platform
app-crypt/ophcrack:tables - Require the additional tables used to carry out cracking (app-crypt/ophcrack-tables)
app-crypt/ophcrack-tables:vistafree - Installs the free Vista ophcrack tables
app-crypt/ophcrack-tables:xpfast - Installs the fast XP ophcrack tables
app-crypt/ophcrack-tables:xpsmall - Installs the small free XP ophcrack tables
app-crypt/p11-kit:asn1 - Enable ASN.1 certificate support
app-crypt/p11-kit:trust - Build the trust policy module
app-crypt/seahorse:ldap - Enable seahorse to manipulate GPG keys on a LDAP server.
app-crypt/seahorse-plugins:applet - Enable seahorse applet for gnome-base/gnome-panel
app-crypt/seahorse-plugins:gedit - Enable text encryption plugin to integrate into app-editors/gedit
app-crypt/seahorse-plugins:nautilus - Enable file encryption plugin to integrate into the gnome-base/nautilus context menu
app-crypt/shishi:3des - Enable 3DES encryption/checksum type.
app-crypt/shishi:aes - Enable AES encryption/checksum types.
app-crypt/shishi:arcfour - Enable ARCFOUR encryption/checksum type.
app-crypt/shishi:des - Enable DES related encryption/checksum types.
app-crypt/shishi:md - Enable unkeyed MD4/MD5 checksum types.
app-crypt/shishi:null - Enable dummy NULL encryption/checksum type.
app-crypt/tc-play:openssl - Use openssl crypto backend.
app-crypt/tpm-tools:pkcs11 - Build Token data management utilities based on OpenCryptoki's (dev-libs/opencryptoki) PKCS#11 implementation.
app-crypt/truecrypt:asm - Enable assembly for optimization
app-dicts/aspell-be:classic - Support classic spelling by default
app-dicts/gwaei:mecab - Enable app-text/mecab support
app-dicts/gwaei:unique - Enable single instance support using dev-libs/libunique.
app-dicts/myspell-pt:preao - Use the pre ortographic agreement version of the dictionary
app-doc/csound-manual:html - Install HTML documentation
app-doc/doxygen:dot - allow to create dot graphs using media-gfx/graphviz
app-doc/doxygen:nodot - removes graphviz dependency, along with dot graphs
app-doc/linuxfromscratch:htmlsingle - Install all-on-one-page HTML version.
app-doc/pms:binary - Download pre-built files instead of building from sources
app-doc/pms:html - Generate PMS as .html as well
app-doc/tldp-howto:html - Install multi-chapter HTML docs
app-doc/tldp-howto:htmlsingle - Install all-on-one-page HTML docs
app-doc/tldp-howto:pdf - Install pdf docs
app-doc/tldp-howto:text - Install plain-text docs
app-editors/emacs:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
app-editors/emacs:games - Support shared score files for games
app-editors/emacs:gconf - Use gnome-base/gconf to read the system font name
app-editors/emacs:gsettings - Use gsettings (dev-libs/glib) to read the system font name
app-editors/emacs:gtk3 - Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
app-editors/emacs:gzip-el - Compress bundled Emacs Lisp source
app-editors/emacs:hesiod - Enable support for net-dns/hesiod
app-editors/emacs:imagemagick - Use media-gfx/imagemagick for image processing
app-editors/emacs:leim - Add support for Emacs input methods
app-editors/emacs:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
app-editors/emacs:pax_kernel - Enable building under a PaX enabled kernel (sys-apps/paxctl)
app-editors/emacs:sendmail - Build Emacs with MTA support
app-editors/emacs:source - Install C source files and make them available for find-function
app-editors/emacs:toolkit-scroll-bars - Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars
app-editors/emacs:wide-int - Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size.
app-editors/emacs-vcs:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
app-editors/emacs-vcs:games - Support shared score files for games
app-editors/emacs-vcs:gconf - Use gnome-base/gconf to read the system font name
app-editors/emacs-vcs:gfile - Use gfile (dev-libs/glib) for file notification
app-editors/emacs-vcs:gsettings - Use gsettings (dev-libs/glib) to read the system font name
app-editors/emacs-vcs:gtk3 - Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
app-editors/emacs-vcs:gzip-el - Compress bundled Emacs Lisp source
app-editors/emacs-vcs:hesiod - Enable support for net-dns/hesiod
app-editors/emacs-vcs:imagemagick - Use media-gfx/imagemagick for image processing
app-editors/emacs-vcs:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal Lisp implementations
app-editors/emacs-vcs:pax_kernel - Enable building under a PaX enabled kernel (sys-apps/paxctl)
app-editors/emacs-vcs:source - Install C source files and make them available for find-function
app-editors/emacs-vcs:toolkit-scroll-bars - Use the selected toolkit's scrollbars in preference to Emacs' own scrollbars
app-editors/emacs-vcs:wide-int - Prefer wide Emacs integers (typically 62-bit). This option has an effect only on architectures where "long" and "long long" types have different size.
app-editors/fe:sendmail - Send mail after editor abend
app-editors/gedit:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
app-editors/gedit-plugins:charmap - Insert special characters just by clicking on them
app-editors/gedit-plugins:git - Shows document changes related to git's HEAD
app-editors/gedit-plugins:synctex - Synchronize between LaTeX and PDF with gedit and evince
app-editors/gedit-plugins:terminal - Embed a terminal in the bottom pane
app-editors/gvim:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-editors/gvim:netbeans - Include netbeans external editor integration support
app-editors/gvim:racket - Enable support for Scheme using dev-lang/racket
app-editors/jasspa-microemacs:nanoemacs - Build NanoEmacs instead of MicroEmacs
app-editors/joe:xterm - Enable full xterm clipboard support
app-editors/latexila:latexmk - Install dev-tex/latexmk (used by default for the build tools)
app-editors/latexila:rubber - Install dev-tex/rubber (can be used for the build tools)
app-editors/leafpad:emacs - Enable Emacs key theme
app-editors/nano:debug - Enable debug messages and assert warnings. Note that these will all be sent straight to stderr rather than some logging facility.
app-editors/nano:justify - Enable justify/unjustify functions for text formatting.
app-editors/nano:magic - Add magic file support (sys-apps/file) to automatically detect appropriate syntax highlighting
app-editors/nano:minimal - Disable all fancy features, including ones that otherwise have a dedicated USE flag (such as spelling).
app-editors/tea:aspell - Enable spellchecking using app-text/aspell
app-editors/tea:hunspell - Enable spellchecking using app-text/hunspell
app-editors/vim:X - Link console vim against X11 libraries to enable title and clipboard features in xterm
app-editors/vim:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-editors/vim:racket - Enable support for Scheme using dev-lang/racket
app-editors/vim:vim-pager - Install vimpager and vimmanpager links
app-editors/vim-qt:luajit - Use dev-lang/luajit instead of dev-lang/lua
app-editors/xemacs:athena - Chooses the MIT Athena widget set
app-editors/xemacs:dnd - Enables support for the x11-libs/dnd drag-n-drop library
app-editors/xemacs:eolconv - Support detection and translation of newline conventions
app-editors/xemacs:pop - Support POP for mail retrieval
app-editors/xemacs:xim - Enable X11 XiM input method
app-editors/xmlcopyeditor:guidexml - Install GuideXML templates to work with Gentoo official docs
app-editors/zile:valgrind - Enable usage of dev-util/valgrind in tests
app-emacs/anything:extensions - Install optional extensions
app-emacs/auctex:preview-latex - Use bundled preview-latex
app-emacs/bbdb:tex - Install plain TeX support files
app-emacs/calfw:howm - Add support for the app-emacs/howm note-taking tool
app-emacs/company-mode:ropemacs - Install backend for dev-python/ropemacs
app-emacs/delicious:planner - Include support for app-emacs/planner
app-emacs/emacs-common-gentoo:games - Support shared score files for games
app-emacs/emhacks:jde - Enable support for Java Development Environment
app-emacs/magit:contrib - Install user-contributed files
app-emacs/org-mode:contrib - Install user-contributed files
app-emacs/org-mode:odt-schema - Install non-free schema files for OpenDocument Text exporter
app-emacs/remember:bbdb - Include support for app-emacs/bbdb
app-emacs/remember:planner - Include support for app-emacs/planner
app-emacs/slime:xref - Install xref.lisp cross-referencing tool
app-emacs/vm:bbdb - Include support for app-emacs/bbdb
app-emacs/wanderlust:bbdb - Include support for app-emacs/bbdb
app-emacs/wikipedia-mode:outline-magic - Enable support for outline-mode extensions (app-emacs/outline-magic)
app-emulation/aranym:fullmmu - Enable full 68040 MMU emulation
app-emulation/aranym:lilo - Enable Linux-m68k loader
app-emulation/aranym:usbhost - Enable NatFeat USB
app-emulation/bochs:avx - Enable support for Advanced Vector Extensions (AVX)
app-emulation/bochs:debugger - Enable debugger (slows down emulation)
app-emulation/bochs:gdb - Enable support for the remote GDB stub
app-emulation/bochs:x86-64 - Enable support for emulation of 64-bit CPUs
app-emulation/crossover-bin:capi - Enable ISDN support via CAPI
app-emulation/docker:aufs - Enables dependencies for the "aufs" graph driver, including necessary kernel flags.
app-emulation/docker:btrfs - Enables dependencies for the "btrfs" graph driver, including necessary kernel flags.
app-emulation/docker:device-mapper - Enables dependencies for the "devicemapper" graph driver, including necessary kernel flags.
app-emulation/docker:lxc - Enables dependencies for the "lxc" execution driver.
app-emulation/dosemu:fluidsynth - use media-sound/fluidsynth for MIDI emulation
app-emulation/e-uae:capslib - Add CAPS library support
app-emulation/e-uae:sdl-sound - Use media-libs/sdl-sound for audio output
app-emulation/emul-linux-x86-baselibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-compat:development - Install pkgconfig files
app-emulation/emul-linux-x86-cpplibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-db:development - Install pkgconfig files
app-emulation/emul-linux-x86-gstplugins:development - Install pkgconfig files
app-emulation/emul-linux-x86-gtklibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-gtkmmlibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-java:pax_kernel - Use paxctl to mark the JVM binaries.
app-emulation/emul-linux-x86-jna:development - Install pkgconfig files
app-emulation/emul-linux-x86-medialibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-motif:development - Install pkgconfig files
app-emulation/emul-linux-x86-opengl:development - Install pkgconfig files
app-emulation/emul-linux-x86-qtlibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-qtlibs:gtkstyle - Build a Qt style called GTK+ that mimics the active GTK+ theme
app-emulation/emul-linux-x86-sdl:development - Install pkgconfig files
app-emulation/emul-linux-x86-soundlibs:development - Install pkgconfig files
app-emulation/emul-linux-x86-soundlibs:pulseaudio - Pull in pulseaudio if using USE=abi_x86_32
app-emulation/emul-linux-x86-xlibs:development - Install pkgconfig files
app-emulation/free42:alsa - Adds support for Advanced Linux Sound Architecture
app-emulation/fuse-utils:gcrypt - Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.
app-emulation/ganeti:drbd - Enable DRBD support
app-emulation/ganeti:filestorage - Enable File Storage
app-emulation/ganeti:haskell-daemons - Build haskell daemons instead of python
app-emulation/ganeti:htools - Enable htools support
app-emulation/ganeti:kvm - Enable KVM support
app-emulation/ganeti:lxc - Enable Linux Countainers support
app-emulation/ganeti:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/ganeti:sharedstorage - Enable Shared Storage support
app-emulation/ganeti:xen - Enable Xen support
app-emulation/libguestfs:erlang - Build Erlang bindings
app-emulation/libguestfs:fuse - Enable image mount support via fuse
app-emulation/libguestfs:inspect-icons - Use media-gfx/icoutilsfor acces icon file in image and inspect it
app-emulation/libguestfs:introspection - Use dev-libs/gobject-introspection for introspection
app-emulation/libguestfs:systemtap - Use dev-util/systemtap to inspect VM via "probes" way
app-emulation/libspectrum:gcrypt - Use dev-libs/libgcrypt for low-level crypto of some features, including logfiles.
app-emulation/libvirt:audit - support sys-process/audit
app-emulation/libvirt:firewalld - DBus interface to iptables/ebtables allowing for better runtime management of your firewall.
app-emulation/libvirt:fuse - Allow LXC to use sys-fs/fuse for mount points
app-emulation/libvirt:iscsi - Allow using an iSCSI remote storage server as pool for disk image storage
app-emulation/libvirt:libvirtd - Builds the libvirtd daemon as well as the client utilities instead of just the client utilities
app-emulation/libvirt:lvm - Allow using the Logical Volume Manager (sys-apps/lvm2) as pool for disk image storage
app-emulation/libvirt:lxc - Support management of Linux Containers virtualisation (app-emulation/lxc)
app-emulation/libvirt:macvtap - Support for MAC-based TAP (macvlan/macvtap). For networking instead of the normal TUN/TAP. It has its advantages and disadvantages. macvtap support requires very new kernels and is currently evolving. Support for this is experimental at best.
app-emulation/libvirt:nfs - Allow using Network File System mounts as pool for disk image storage
app-emulation/libvirt:numa - Use NUMA for memory segmenting via sys-process/numactl and sys-process/numad
app-emulation/libvirt:openvz - Support management of OpenVZ virtualisation (see sys-kernel/openvz-sources)
app-emulation/libvirt:parted - Allow using real disk partitions as pool for disk image storage, using sys-block/parted to create, resize and delete them.
app-emulation/libvirt:pcap - Support auto learning IP addreses for routing
app-emulation/libvirt:phyp - Support IBM HMC / IVM hypervisor via PHYP protocol
app-emulation/libvirt:qemu - Support management of QEmu virtualisation (one of app-emulation/qemu, app-emulation/qemu-kvm or app-emulation/qemu-spice)
app-emulation/libvirt:rbd - Enable rados block device support via sys-cluster/ceph
app-emulation/libvirt:uml - Support management of User Mode Linux virtualisation
app-emulation/libvirt:vepa - Virtual Ethernet Port Aggregator (VEPA) / 802.1Qbg support. Relies on macvtap support.
app-emulation/libvirt:virt-network - Enable virtual networking (NAT) support for guests. Includes all the dependencies for NATed network mode. Effectively any network setup that relies on libvirt to setup and configure network interfaces on your host. This can include bridged and routed networks ONLY if you are allowing libvirt to create and manage the underlying devices for you. In some cases this requires enabling the 'netcf' USE flag (currently unavailable).
app-emulation/libvirt:virtualbox - Support management of VirtualBox virtualisation (one of app-emulation/virtualbox or app-emulation/virtualbox-ose)
app-emulation/libvirt:xen - Support management of Xen virtualisation (app-emulation/xen)
app-emulation/libvirt-glib:introspection - Use dev-libs/gobject-introspection for introspection
app-emulation/libvirt-glib:vala - Enable bindings for dev-lang/vala
app-emulation/lxc:vanilla - Avoid adding Gentoo Linux-specific modifications, which include the custom init script. This is present as a flag to avoid forcing dependencies over users that might not want have them around as they use LXC in contexts where the init script is not useful.
app-emulation/open-vm-tools:doc - Generate API documentation
app-emulation/open-vm-tools:fuse - Build vmblock-fuse in favor of FUSE based blocking mechanism for DnD
app-emulation/open-vm-tools:pic - Force shared libraries to be built as PIC
app-emulation/playonlinux:winbind - Enables support for the winbind auth daemon
app-emulation/q4wine:gnome - Use the gksu sudo GUI for managing the devices
app-emulation/q4wine:icoutils - Enable icoutils support
app-emulation/q4wine:kde - Use the kdesu sudo GUI for managing the devices
app-emulation/q4wine:wineappdb - Enable Win AppDB browser subsystem
app-emulation/qemu:accessibility - Adds support for braille displays using brltty
app-emulation/qemu:aio - Enables support for Linux's Async IO
app-emulation/qemu:alsa - Enable alsa output for sound emulation
app-emulation/qemu:curl - Support ISOs / -cdrom directives vis HTTP or HTTPS.
app-emulation/qemu:fdt - Enables firmware device tree support
app-emulation/qemu:glusterfs - Enables GlusterFS cluster fileystem via sys-cluster/glusterfs
app-emulation/qemu:iscsi - Enable direct iSCSI support via net-libs/libiscsi instead of indirectly via the Linux block layer that sys-block/open-iscsi does.
app-emulation/qemu:jpeg - Enable jpeg image support for the VNC console server
app-emulation/qemu:mixemu - Enable audio mixer emulation. On Fedora, known to cause performance problems when using SDL output and ALSA. For OSS, locks the sound device from other applications.
app-emulation/qemu:ncurses - Enable the ncurses-based console
app-emulation/qemu:png - Enable png image support for the VNC console server
app-emulation/qemu:pulseaudio - Enable pulseaudio output for sound emulation
app-emulation/qemu:rbd - Enable rados block device backend support, see http://ceph.newdream.net/wiki/QEMU-RBD
app-emulation/qemu:sdl - Enable the SDL-based console
app-emulation/qemu:seccomp - Utilize sys-libs/libseccomp to enable kernel filtering of system calls to prevent malicious guests from doing damage.
app-emulation/qemu:spice - Enable Spice protocol support via app-emulation/spice
app-emulation/qemu:ssh - Enable SSH based block device support via net-libs/libssh2
app-emulation/qemu:static - Enables both 'static-softmmu' and 'static-user'
app-emulation/qemu:static-softmmu - Builds the Software MMU (system) targets as static binaries
app-emulation/qemu:static-user - Build the User targets as static binaries
app-emulation/qemu:systemtap - Enable SystemTAP/DTrace tracing
app-emulation/qemu:tci - Enable the TCG Interpreter which can speed up or slowdown workloads depending on the host and guest CPUs being emulated. In the future it will be a runtime option but for now its compile time.
app-emulation/qemu:tls - Enable TLS support for the VNC console server. For 1.4 and newer this also enables WebSocket support.
app-emulation/qemu:usb - Enable USB passthrough via dev-libs/libusb
app-emulation/qemu:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
app-emulation/qemu:uuid - Enable UUID support in the vdi block driver
app-emulation/qemu:vde - Enable VDE-based networking
app-emulation/qemu:vhost-net - Enable accelerated networking using vhost-net, see http://www.linux-kvm.org/page/VhostNet
app-emulation/qemu:virtfs - Enable VirtFS via virtio-9p-pci / fsdev. See http://wiki.qemu.org/Documentation/9psetup
app-emulation/qemu:xattr - Add support for getting and setting POSIX extended attributes, through sys-apps/attr. Requisite for the virtfs backend.
app-emulation/qemu:xen - Enables support for Xen backends
app-emulation/qemu:xfs - Support xfsctl() notification and syncing for XFS backed virtual disks.
app-emulation/spice:client - Build the spicec client app (does not reduce dependencies at the moment).
app-emulation/spice:gui - Build some GUI components (inside the guest window).
app-emulation/spice:smartcard - Enable smartcard remoting using app-emulation/libcacard
app-emulation/spice-vdagent:consolekit - Use sys-auth/consolekit to determine the master vdagentd in case of multiple running vdagentds (highly recommended)
app-emulation/uae:scsi - Enable the uaescsi.device
app-emulation/vice:ethernet - Enable ethernet emulation
app-emulation/vice:memmap - Enable extra monitor features
app-emulation/vice:xrandr - Enable support for the X xrandr extension
app-emulation/virt-manager:policykit - Enables sys-auth/polkit authentication support, required when using app-emulation/libvirt with PolicyKit authentication
app-emulation/virt-manager:sasl - Depend on the proper libraries needed to connect to SASL-enabled libvirtd instances (e.g. Kerberos-protected instances).
app-emulation/virt-manager:spice - Support connecting to SPICE-enabled virtual machines.
app-emulation/virt-manager:vnc - Support connecting to VNC-enabled virtual machines.
app-emulation/virt-viewer:spice - Support connecting to SPICE-enabled virtual machines.
app-emulation/virt-viewer:vnc - Support connecting to VNC-enabled virtual machines.
app-emulation/virtualbox:additions - Install Guest System Tools ISO
app-emulation/virtualbox:extensions - Install extension module packages
app-emulation/virtualbox:headless - Build without any graphic frontend
app-emulation/virtualbox:sdk - Enable building of SDK
app-emulation/virtualbox:vboxwebsrv - Build and install the VirtualBox webservice
app-emulation/virtualbox-bin:additions - Install Guest System Tools ISO
app-emulation/virtualbox-bin:chm - Install kchmviewer binary to enable online help (in MS CHM format)
app-emulation/virtualbox-bin:headless - Install without any graphic frontend
app-emulation/virtualbox-bin:rdesktop-vrdp - Install the rdesktop client integration
app-emulation/virtualbox-bin:sdk - Enable building of SDK
app-emulation/virtualbox-bin:vboxwebsrv - Install the VirtualBox webservice
app-emulation/virtualbox-modules:pax_kernel - Apply patch needed for pax enabled kernels
app-emulation/vmware-modules:pax_kernel - Apply patch needed for pax enabled kernels
app-emulation/vmware-player:vmware-tools - Install VMware Tools images
app-emulation/vmware-workstation:ovftool - Install OVF tool.
app-emulation/vmware-workstation:server - Install VMware Workstation Server component.
app-emulation/vmware-workstation:vix - Install VIX. The VIX API allows you to write programs and scripts that automate virtual machine operations, and run programs or manipulate files within guest operating systems.
app-emulation/vmware-workstation:vmware-tools - Install VMware Tools images
app-emulation/vov:gprof - build with profiling support
app-emulation/wine:capi - Enable ISDN support via CAPI
app-emulation/wine:custom-cflags - Bypass strip-flags; use at your own peril
app-emulation/wine:dos - Pull in games-emulation/dosbox to run DOS applications
app-emulation/wine:gecko - Add support for the Gecko engine when using iexplore
app-emulation/wine:mono - Add support for .NET using Wine's Mono add-on
app-emulation/wine:netapi - Use libnetapi from net-fs/samba to support Windows networks in netapi32.dll
app-emulation/wine:opencl - Enable OpenCL support
app-emulation/wine:osmesa - Add support for OpenGL in bitmaps using libOSMesa
app-emulation/wine:perl - Install helpers written in perl (winedump/winemaker)
app-emulation/wine:prelink - Run prelink on DLLs during build -- do not disable if you do not know what this means as it can break things at runtime
app-emulation/wine:realtime - Pull in sys-auth/rtkit for low-latency pulseaudio support
app-emulation/wine:run-exes - Use Wine to open and run .EXE and .MSI files
app-emulation/wine:samba - Add support for NTLM auth. see http://wiki.winehq.org/NtlmAuthSetupGuide and http://wiki.winehq.org/NtlmSigningAndSealing
app-emulation/wine:udisks - Support dynamic storage devices using sys-fs/udisks
app-emulation/wine:win32 - Build a 32bit version of Wine (won't run Win64 binaries)
app-emulation/wine:win64 - Build a 64bit version of Wine (won't run Win32 binaries)
app-emulation/winetricks:rar - Pull in app-arch/unrar for extraction of rar-compressed game files
app-emulation/x48:readline - Enables support for libreadline
app-emulation/xen:efi - Adds efi boot support, requires LDFLAG -melf_x86_64 for amd64
app-emulation/xen:flask - Enable the Flask XSM module from NSA
app-emulation/xen:pae - Enable support for PAE kernels (usually x86-32 with >4GB memory)
app-emulation/xen:xsm - Enable the Xen Security Modules (XSM)
app-emulation/xen-tools:api - Build the C libxenapi bindings
app-emulation/xen-tools:flask - Enable the Flask XSM module from NSA
app-emulation/xen-tools:hvm - Enable support for hardware based virtualization (VT-x,AMD-v)
app-emulation/xen-tools:ocaml - Enable support for the ocaml language
app-emulation/xen-tools:pam - Enable pam support
app-emulation/xen-tools:pygrub - Install the pygrub boot loader
app-emulation/xen-tools:qemu - Enable IOEMU support via the use of qemu-dm
app-emulation/xen-tools:screen - Enable support for running domain U console in an app-misc/screen session
app-emulation/xen-tools:xend - Enable support the xend and xm to manage xen
app-emulation/xtrs:ldos - Install disk images for Model 4P
app-forensics/afflib:fuse - Enable extra fuse thingies
app-forensics/afflib:qemu - Enable qemu stuff
app-forensics/afflib:s3 - Enable support for Amazon S3
app-forensics/aide:audit - Enable support for sys-process/audit
app-forensics/aide:prelink - Enable support for sys-devel/prelink
app-forensics/chkrootkit:cron - Install cron script for weekly rootkit scans
app-forensics/libewf:bfio - Enables libbfio for chaining file in file handling
app-forensics/libewf:ewf - Enables the v1 API
app-forensics/libewf:fuse - Enable fuse support for ewfmount
app-forensics/libewf:rawio - Enables raw IO handling
app-forensics/libewf:uuid - Enable UUID support in the ewftools
app-forensics/openscap:gconf - Build the gconf independant probes
app-forensics/openscap:nss - Prefer NSS over libgcrypt as the crypto engine
app-forensics/openscap:rpm - Compiles the RPM probes
app-forensics/openscap:sce - Enables Script Check Engine (SCE) support
app-forensics/openscap:sql - Build the sql independant probes
app-forensics/ovaldi:rpm - Enable the RPM probes
app-forensics/sleuthkit:aff - Enable extra aff formats
app-forensics/sleuthkit:ewf - Enable libewf support
app-i18n/anthy:canna-2ch - Enable support for app-dicts/canna-2ch
app-i18n/fcitx:autostart - Enable xdg-compatible autostart of fcitx
app-i18n/fcitx:enchant - Use app-text/enchant for text prediction
app-i18n/fcitx:gtk - Install GTK2 IM module
app-i18n/fcitx:gtk3 - Install GTK3 IM module
app-i18n/fcitx:introspection - Enable GObject Introspection
app-i18n/fcitx:opencc - Enable OpenCC for Chinese Transform
app-i18n/fcitx:pango - Enable support for x11-libs/pango
app-i18n/fcitx:qt4 - Install Qt4 IM module
app-i18n/fcitx:snooper - Enable Key Snooper for GTK app
app-i18n/fcitx:table - Enable Table IM
app-i18n/fcitx-configtool:gtk3 - Use GTK+3 instead of 2
app-i18n/ibus:dconf - Enable support for gnome-base/dconf
app-i18n/ibus:deprecated - install the deprecated ibus python library
app-i18n/ibus:gconf - Enable support for gnome-base/gconf
app-i18n/ibus:gtk3 - Enable support for gtk+3
app-i18n/ibus:introspection - Use dev-libs/gobject-introspection for introspection
app-i18n/ibus:vala - Enable support for dev-lang/vala
app-i18n/ibus-anthy:deprecated - Install deprecated pygtk2 library
app-i18n/ibus-handwrite:zinnia - Build with app-i18n/zinnia engine.
app-i18n/ibus-m17n:gtk - Build the preference interfaces, based on x11-libs/gtk+ (GTK+ 2).
app-i18n/ibus-pinyin:boost - Compile against dev-libs/boost libraries
app-i18n/ibus-pinyin:opencc - Enable support for app-i18n/opencc
app-i18n/ibus-unikey:gtk3 - Enable support for gtk+3
app-i18n/im-ja:anthy - Support for Anthy input method
app-i18n/im-ja:skk - Support for SKK input method
app-i18n/imsettings:gconf - Enable GConf support
app-i18n/imsettings:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/imsettings:xfconf - Enable integration in the Xfce desktop environment with xfce-base/xfconf
app-i18n/kimera:anthy - Support for Anthy input method
app-i18n/libskk:introspection - Use dev-libs/gobject-introspection for introspection
app-i18n/libtomoe-gtk:gucharmap - Enable gucharmap dictionary plugin
app-i18n/mozc:ibus - Enable support for app-i18n/ibus
app-i18n/mozc:renderer - Enable native candidate window.
app-i18n/mozc:scim - Enable support for app-i18n/scim
app-i18n/pyzy:boost - Enable support for dev-libs/boost
app-i18n/pyzy:doc - Enable support for documents
app-i18n/pyzy:opencc - Use app-i18n/opencc for input
app-i18n/scim:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/scim-anthy:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/scim-anthy:kasumi - Use Anthy dictionary maintenance tool (app-dicts/kasumi)
app-i18n/scim-tomoe:gucharmap - Enable gucharmap dictionary plugin
app-i18n/tomoe:hyperestraier - Enable support for app-text/hyperestraier
app-i18n/uim:anthy - Enable support for app-i18n/anthy input method
app-i18n/uim:eb - Enable support for dev-libs/eb
app-i18n/uim:gtk3 - Enable support for x11-libs/gtk+:3
app-i18n/uim:skk - Enable support for app-i18n/skk-jisyo
app-laptop/ibam:gkrellm - Enable building of app-admin/gkrellm module
app-laptop/laptop-mode-tools:scsi - Adds dependency on sdparm to control non-SATA SCSI drivers
app-laptop/pbbuttonsd:ibam - Enable support for Intelligent Battery Monitoring
app-laptop/pbbuttonsd:macbook - Enable support for the Macbook and Macbook Pro
app-laptop/prey:alarm - Module for playing an audio file
app-laptop/prey:alert - Display a warning message when the computer seems to be stolen"
app-laptop/prey:geo - Module for retrieving the physical location of the stolen computer
app-laptop/prey:lock - Lock stolen computer
app-laptop/prey:network - Get network information (active connections, traceroute) from stolen computer
app-laptop/prey:secure - Delete or hide sensitive user data
app-laptop/prey:session - Get screenshots from user session
app-laptop/prey:userpriv - Create a prey user group so regular users can access and modify the prey configuration. Use it with caution
app-laptop/prey:webcam - Use computer's webcam to take screenshots of the thief
app-laptop/thinkfan:atasmart - include libatasmart support to get disc temperature
app-laptop/tp_smapi:hdaps - Install a compatible HDAPS module
app-leechcraft/lc-azoth:acetamide - Build Acetamide, the IRC protocol support
app-leechcraft/lc-azoth:adiumstyles - Build support for Adium styles
app-leechcraft/lc-azoth:astrality - Build Astrality, support for protocols provided by Telepathy
app-leechcraft/lc-azoth:autoidler - Build support for automatic status changing according to user idle time
app-leechcraft/lc-azoth:autopaste - Build Autopaste for pasting long texts to pastebins
app-leechcraft/lc-azoth:birthdaynotifier - Build Birthday Notifier for you to not forget about birthdays of your contacts.
app-leechcraft/lc-azoth:chathistory - Build ChatHistory which stories chat history
app-leechcraft/lc-azoth:depester - Build Depester which enables to ignore MUC participants
app-leechcraft/lc-azoth:embedmedia - Build EmbedMedia for embedding flash videos and images directly into chat windows
app-leechcraft/lc-azoth:herbicide - Build Herbicide, a basic antispam plugin
app-leechcraft/lc-azoth:hili - Build HiLi which allows to customize highlight settings in MUCs
app-leechcraft/lc-azoth:isterique - Build Isterique plugin for neutralizing excessive caps lock usage
app-leechcraft/lc-azoth:juick - Build plugin for the Juick.com microblogging service
app-leechcraft/lc-azoth:keeso - Build plugin for changing text into SoMEtHInG lIKe THiS
app-leechcraft/lc-azoth:lastseen - Build plugin for client-side recording of the last online/available time
app-leechcraft/lc-azoth:media - Enable media calls
app-leechcraft/lc-azoth:metacontacts - Build plugin for metacontacts support
app-leechcraft/lc-azoth:murm - Build Murm, the VKontakte messaging support via their native API (instead of XMPP)
app-leechcraft/lc-azoth:nativeemoticons - Build support for native Azoth's emoticons packs
app-leechcraft/lc-azoth:otroid - Build OTRoid, plugin for the Off-the-Record deniable encryption system
app-leechcraft/lc-azoth:p100q - Build p100q, plugin for psto.net microblogging service
app-leechcraft/lc-azoth:shx - Build shell command executor plugin
app-leechcraft/lc-azoth:standardstyles - Build support for standard Azoth styles engine
app-leechcraft/lc-azoth:vader - Bulid Vader, the MRIM (Mail.Ru Agent) protocol support plugin
app-leechcraft/lc-azoth:woodpecker - Build Woodpecker, the Twitter client plugin
app-leechcraft/lc-azoth:xtazy - Build Xtazy for publishing currently playing tune
app-leechcraft/lc-blasq:deathnote - Support LiveJournal FotoBilder service
app-leechcraft/lc-blasq:rappor - Support VKontakte service
app-leechcraft/lc-blasq:spegnersi - Support Flickr service
app-leechcraft/lc-blasq:vangog - Support Picasa service
app-leechcraft/lc-blogique:hestia - Allows one to keep a local blog
app-leechcraft/lc-blogique:metida - Support for the LiveJournal blogging platform
app-leechcraft/lc-core:qwt - Support for QML plotting item through x11-libs/qwt
app-leechcraft/lc-gmailnotifier:notify - Pull in a plugin to show notifications from GMail Notiifer
app-leechcraft/lc-gmailnotifier:quark - Pull in a plugin to show GMail Notifier's quark
app-leechcraft/lc-lmp:graffiti - Build media tags editor plugin
app-leechcraft/lc-lmp:guess - Enable tags encoding guessing via the libguess library
app-leechcraft/lc-lmp:mp3tunes - Build plugin for supporting the mp3tunes.com music locker service.
app-leechcraft/lc-lmp:mpris - Enable MPRIS support
app-leechcraft/lc-monocle:fb2 - Enable support for FictionBook format
app-leechcraft/lc-monocle:spectre - Enable PostScript backend for Monocle using the app-text/libspectre
app-leechcraft/lc-musiczombie:acoustid - Use media-libs/chromaprint for acoustic fingerprinting
app-leechcraft/lc-netstoremanager:googledrive - Support Google Drive storage backend
app-leechcraft/lc-netstoremanager:yandexdisk - Support Yandex.Disk storage backend
app-leechcraft/lc-poshuku:cleanweb - Build CleanWeb for ad blocking compatible with Firefox's AdBlock+.
app-leechcraft/lc-poshuku:fatape - Build FatApe, GreaseMonkey userscripts support layer.
app-leechcraft/lc-poshuku:filescheme - Build FileScheme for accessing local URLs.
app-leechcraft/lc-poshuku:fua - Build FUA for faking user agents for different hosts.
app-leechcraft/lc-poshuku:keywords - Build Keywords for adjusting search shortcuts.
app-leechcraft/lc-poshuku:onlinebookmarks - Build OnlineBookmarks for syncing bookmarks with social bookmarking services like Read It Later.
app-leechcraft/lc-poshuku:pcre - Use dev-libs/libpcre for rules matching in CleanWeb instead of slower QRegExp.
app-leechcraft/lc-poshuku:wyfv - Build WYFV for replacing Flash-based video players on some sites.
app-leechcraft/lc-vrooby:udisks - Use sys-fs/udisks:0 for block device access (e.g., automounting)
app-leechcraft/lc-vrooby:udisks2 - Use sys-fs/udisks:2 for block device access (e.g., automounting)
app-leechcraft/leechcraft-meta:de - Install components, that allow using Leechcraft as Desktop Environment
app-leechcraft/leechcraft-meta:unstable - Pull plugins from ~arch
app-misc/anki:recording - Enable support for audio recording
app-misc/anki:sound - Enable support for adding sound to cards
app-misc/binwalk:graph - Enable support for generating entropy graphs
app-misc/brewtarget:phonon - Enable sound support via media-libs/phonon or dev-qt/qtphonon
app-misc/byobu:screen - Use app-misc/screen as the default backend
app-misc/ca-certificates:cacert - Include root certs from CAcert (http://http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/)
app-misc/ddccontrol:ddcpci - enable direct PCI memory access (the setuid ddcpci util)
app-misc/digitemp:ds2490 - Build support for the ds2490 sensor
app-misc/digitemp:ds9097 - Build support for the ds9097 sensor
app-misc/digitemp:ds9097u - Build support for the ds9097u sensor
app-misc/emelfm2:ansi - Add support for ANSI escape sequences
app-misc/emelfm2:gtk3 - Use x11-libs/gtk:3 instead of x11-libs/gtk:2
app-misc/freemind:groovy - Build plugin for scripting via Groovy
app-misc/freemind:latex - Build plugin for inserting mathematical formulas in LaTeX syntax
app-misc/freemind:pdf - Build plugin for exporting mindmaps to SVG and PDF
app-misc/freemind:svg - Build plugin for exporting mindmaps to SVG and PDF
app-misc/gcstar:stats - Enable statistics reporting
app-misc/gcstar:tellico - Enable support for kde-misc/tellico files
app-misc/geneweb:ocamlopt - Enable ocamlopt support (dev-lang/ocaml native code compiler)
app-misc/geoclue:geonames - Install geonames.org provider
app-misc/geoclue:gsmloc - Install GSM location provider
app-misc/geoclue:gtk - Install gtk-based geoclue-test-gui
app-misc/geoclue:hostip - Install hostip.info provder
app-misc/geoclue:manual - Install manual provider
app-misc/geoclue:nominatim - Install openstreetmap.org provider
app-misc/geoclue:plazes - Install plazes.com provider
app-misc/geoclue:server - Install geoip server
app-misc/geoclue:skyhook - Install skyhookwireless.com provider
app-misc/geoclue:yahoo-geo - Install Yahoo geolocation provider
app-misc/gourmet:gnome-print - <=app-misc/gourmet-0.15.9 Enable pretty Python printing with Gnome
app-misc/gourmet:i18n - >app-misc/gourmet-0.16 Enable support for i18n through elib.intl
app-misc/gourmet:ipython - >app-misc/gourmet-0.16 Enable support for the interactive Python console plugin
app-misc/gourmet:pdf - Enable export to PDF
app-misc/gourmet:print - >app-misc/gourmet-0.16 Enable pretty Python printing
app-misc/gourmet:rtf - <=app-misc/gourmet-0.15.9 Enable export to RTF
app-misc/gourmet:spell - >app-misc/gourmet-0.16 Enable support for the spell check plugin
app-misc/gourmet:web - >app-misc/gourmet-0.16 Enable support for the web import plugin
app-misc/gramps:reports - All external software that is needed for graphical reports will be installed
app-misc/gramps:webkit - Use Webkit-based rendering for geographical data view.
app-misc/graphlcd-base:g15 - Add support for app-misc/g15daemon driver (e.g. Logitech G15 Keybord)
app-misc/lcd-stuff:mpd - Add support for display of mpd controlled music (media-libs/libmpd)
app-misc/lcd4linux:mpd - Add support for display of mpd controlled music (media-libs/libmpd)
app-misc/lcdproc:ftdi - Enable support for FTDI connections in some selected LCD_DEVICES (currently hd44780)
app-misc/lcdproc:hid - Enable HID support using libhid
app-misc/lcdproc:irman - Enable support for IRMan (media-libs/libirman)
app-misc/lcdproc:lcd_devices_sdeclcd - Enable support for VLSYS M428 display
app-misc/lcdproc:lcd_devices_vlsys_m428 - Enable support for VLSYS M428 display
app-misc/lcdproc:nfs - Adds support for NFS file system
app-misc/lcdproc:seamless-hbars - Try to avoid gaps in horizontal bars
app-misc/lirc:hardware-carrier - The transmitter device generates its clock signal in hardware
app-misc/lirc:transmitter - Add transmitter support to some lirc-drivers (e.g. serial)
app-misc/mc:edit - Compile and install the mcedit application
app-misc/mc:mclib - Compile and install the libmc.so shared library
app-misc/mc:sftp - Add support for sftp (uses net-libs/libssh2 for it).
app-misc/mc:slang - Use sys-libs/slang instead of sys-libs/ncurses.
app-misc/mc:xdg - Toggles mc's config dir location. Enable for $XDG_CONFIG_HOME/mc, disable for $HOME/.mc
app-misc/muttprint:doc - Builds documentation
app-misc/note:general - Add support for ascii flatfile backend
app-misc/note:text - Add support for text backend
app-misc/pax-utils:python - Install a more powerful/faster version of lddtree
app-misc/recoll:audio - Index audio files
app-misc/recoll:camelcase - Enable indexing for camelCase sentences and words
app-misc/recoll:chm - Index chm files
app-misc/recoll:dvi - Index dvi files
app-misc/recoll:ics - Index iCalendar files
app-misc/recoll:info - Index GNU info files
app-misc/recoll:inotify - Use the Linux Kernel notification subsystem for monitoring file alterations in realtime
app-misc/recoll:lyx - Index Latex lyx files
app-misc/recoll:msdoc - Index Microsoft Word documents
app-misc/recoll:msppt - Index Microsoft PowerPoint documents
app-misc/recoll:msxls - Index Microsoft Excel documents
app-misc/recoll:pdf - Index PDF documents
app-misc/recoll:rtf - Index Microsoft RTF documents
app-misc/recoll:session - Stop monitoring file alterations when X11 session terminates
app-misc/recoll:tex - Index TeX files
app-misc/recoll:wordperfect - Index WordPerfect documents
app-misc/recoll:xml - Index several XML-based formats (Abiword, FictionBook, Kword, Office OpenXML, OpenDocument, SVG)
app-misc/roadnav:festival - Enable support for app-accessibility/festival
app-misc/roadnav:flite - Enable support for app-accessibility/flite (festival-lite)
app-misc/roadnav:openstreetmap - Enable openstreetmap support
app-misc/roadnav:scripting - Enable scripting support
app-misc/screen:multiuser - Enable multiuser support (by setting correct permissions)
app-misc/screen:nethack - Express error messages in nethack style
app-misc/sphinx:id64 - use 64-bit document and word IDs
app-misc/sphinx:stemmer - Enable language stemming support
app-misc/strigi:clucene - Enable dev-cpp/clucene backend support.
app-misc/strigi:inotify - Enable support for inotify.
app-misc/strigi:log - Enables advanced logging through dev-libs/log4cxx.
app-misc/subsurface:linguas_da_DK - Language support for da_DK.
app-misc/subsurface:linguas_de_CH - Language support for de_CH.
app-misc/subsurface:linguas_gsw - Language support for gsw.
app-misc/subsurface:linguas_hr_HR - Language support for hr_HR.
app-misc/tablix:pvm - Add support for parallel virtual machine (sys-cluster/pvm)
app-misc/tasque:hiveminder - Allows you to use http://www.hiveminder.com/ as your storage backend.
app-misc/tasque:rememberthemilk - Allows you to use http://www.rememberthemilk.com/ as your storage backend.
app-misc/towitoko:moneyplex - Makes libtowitoko work for the moneyplex home banking software
app-misc/tracker:cue - Enable cue sheet parsing
app-misc/tracker:firefox-bookmarks - Install bookmark data miner plugin for www-client/firefox and www-client/firefox-bin
app-misc/tracker:gsf - Enable gnome-extra/libgsf based data extractor and for ODT.
app-misc/tracker:iptc - Enable extraction of IPTC data from pictures
app-misc/tracker:iso - Enable extraction of metadata from ISO disk images
app-misc/tracker:laptop - Make tracker power management aware
app-misc/tracker:libsecret - Enable libsecret support to store login credentials
app-misc/tracker:miner-fs - Enable tracker-miner-fs (required for filesystem indexing)
app-misc/tracker:nautilus - Enable tracker to integrate with gnome-base/nautilus by providing entries in its context menu
app-misc/tracker:playlist - Add support for playlists
app-misc/tracker:thunderbird - Install email data miner plugin for mail-client/thunderbird and mail-client/thunderbird-bin
app-misc/tracker:xps - Add support for XPS file format through app-text/libgxps.
app-misc/unfoo:minimal - Do not install all support archive binaries
app-misc/vifm:compatibility - Compatibility with previous versions of vifm
app-misc/vifm:developer - Enable features of interest to developers
app-misc/vifm:extended-keys - Support for extended keys (arrows, home etc)
app-misc/vifm:gtk - Use gtk+ to determine mimetypes
app-misc/vifm:magic - Use libmagic to determine mimetypes
app-misc/vifm:vim - Install the vifm vim plugin and vim-compatible documentation
app-misc/vifm:vim-plugin - Install the vifm vim plugin
app-misc/worker:avfs - Enable support for sys-fs/avfs
app-misc/worker:magic - Add magic file support from sys-apps/file to automatically detect file types
app-misc/workrave:distribution - Enable networking. See http://www.workrave.org/features/
app-misc/zygrib:maps - Installs additional GSHHS maps for high resolution coastline data and cities
app-mobilephone/gammu:irda - Enables infrared support
app-mobilephone/gnokii:ical - Enable support for dev-libs/libical
app-mobilephone/gnokii:irda - Enable infrared support
app-mobilephone/gnokii:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite
app-mobilephone/gnokii:sms - Enable SMS support (build smsd)
app-mobilephone/obexd:nokia - Add support for Nokia backup plugin
app-mobilephone/obexd:server - Enables server installation, it's incompatible with obex-data-server provided one
app-mobilephone/smstools:stats - Enable statistic reporting
app-mobilephone/yaps:capi - Enable CAPI support
app-office/abiword:collab - Enable collaborative editing plugin
app-office/abiword:goffice - Enable goffice plugin
app-office/abiword:grammar - Enable grammar checking via dev-libs/link-grammar
app-office/abiword:map - Enable world map support through media-libs/libchamplain
app-office/abiword:math - Enable support for x11-libs/gtkmathview
app-office/abiword:openxml - Enable OpenXML support
app-office/abiword:ots - Enable Text Summarizer plugin
app-office/abiword:plugins - Enable plugins build (see http://www.abisource.com/wiki/PluginMatrix for more information). If your file cannot be opened due lack of support, try enabling this.
app-office/abiword:redland - Enables support redland and raptor libs.
app-office/abiword:thesaurus - Enable thesaurus support
app-office/abiword:wordperfect - Enable wordperfect file support via app-text/libwpd
app-office/calligra:attica - Get hot stuff with dev-libs/libattica
app-office/calligra:eigen - Enable dev-cpp/eigen mathematical templates support
app-office/calligra:glew - Enable media-libs/glew opengl extension library support
app-office/calligra:glib - Enable support for C library routines from dev-libs/glib
app-office/calligra:gsf - Enable support for ODT structures extraction via gnome-extra/libgsf
app-office/calligra:kdcraw - Enable support for KDE image manipulating interface via kde-base/libkdcraw
app-office/calligra:kdepim - Enable support for KDEPIM resources integration
app-office/calligra:marble - Enable displaying of maps using Marble
app-office/calligra:okular - Enable bindings for kde-base/okular
app-office/calligra:opengtl - Enable support for transformation algorithms via media-libs/opengtl
app-office/calligra:spacenav - Enable support for the 3Dconnexion spacenav input device via dev-libs/libspnav
app-office/calligra:vc - Enable support for dev-libs/vc, could be a significant speed boost on krita
app-office/calligra:word-perfect - Enable support for various WordPerfect file formats
app-office/calligra:xbase - Enable support for xbase compatible database formats
app-office/calligra:xslt - Enable xslt and exslt support format support
app-office/glabels:barcode - Enable barcode support through external libraries.
app-office/gnucash:chipcard - Enable support for chipcard reading and processing.
app-office/gnucash:hbci - Enable HBCI support, for connecting to some internet banks
app-office/gnucash:quotes - Enable Online Stock Quote retrieval
app-office/gnucash:webkit - Use net-libs/webkit-gtk for rendering rather than gnome-extra/gtkhtml
app-office/gnumeric:libgda - Enable database support through gnome-extra/libgda.
app-office/gnumeric:perl - Enable perl plugin loader.
app-office/gnumeric:python - Enable python plugin loader.
app-office/imposter:iksemel - Enable external dev-libs/iksemel parsing support
app-office/kmymoney:hbci - Enable HBCI support using net-libs/aqbanking
app-office/kmymoney:quotes - Enable Online Stock Quote retrieval
app-office/libreoffice:gtk3 - Enable highly experimental gtk3 frontend
app-office/libreoffice:jemalloc - Use dev-libs/jemalloc for allocations
app-office/libreoffice:odk - Build the Office Development Kit
app-office/libreoffice:telepathy - Enable document colaboration features using telepathy communication framework.
app-office/libreoffice:vba - Enable support for VBA compatibility and ActiveX embedding
app-office/libreoffice:vlc - Use media-video/vlc for video embedding
app-office/libreoffice:webdav - Adds support for HTTP content adding via net-libs/neon
app-office/libreoffice-l10n:linguas_ca_valencia - Catalan locale (Valencia)
app-office/libreoffice-l10n:linguas_kmr_Latn - kmr_Latn localization
app-office/libreoffice-l10n:linguas_sid - sid localization
app-office/libreoffice-l10n:linguas_sr_Latn - Serbian (Latin) locale
app-office/libreoffice-l10n:offlinehelp - Install help files locally instead of using the LibreOffice Wiki
app-office/lyx:aspell - Add support for aspell spellchecking
app-office/lyx:dia - Add support for diagrams (app-office/dia)
app-office/lyx:docbook - Add support for docbook export
app-office/lyx:dot - Add support for DOT import (media-gfx/graphviz)
app-office/lyx:enchant - Add support for enchant spellchecking wrapper (both aspell and hunspell can be used by LyX).
app-office/lyx:gnumeric - Add support for importing Gnumeric/OpenOffice/MS Excel spreadsheets into LyX.
app-office/lyx:html - Add support for HTML import
app-office/lyx:hunspell - Add support for spellchecking based on hunspell and reuse system-wide OpenOffice dictionaries. This also enable thesaurus dictionaries not accessible via aspell.
app-office/lyx:monolithic-build - This should speed up compilation significantly when you have enough RAM (> 600 MB)
app-office/lyx:rcs - Add support for revision control via dev-vcs/rcs
app-office/lyx:rtf - Add support for RTF import/export packages
app-office/scribus:aspell - Enable support for spell checking with app-text/aspell
app-office/scribus:graphicsmagick - Add support for media-gfx/graphicsmagick
app-office/scribus:hunspell - Enable support for spell checking with app-text/hunspell
app-office/scribus:linguas_cs_CZ - Language support for cs_CZ
app-office/scribus:linguas_da_DK - Language support for da_DK
app-office/scribus:linguas_de_1901 - Language support for de_1901
app-office/scribus:linguas_de_CH - Language support for de_CH
app-office/scribus:linguas_en_AU - Language support for en_AU
app-office/scribus:linguas_lt_LT - Language support for lt_LT
app-office/scribus:linguas_pl_PL - Language support for pl_PL
app-office/scribus:linguas_sa - Language support for sa
app-office/scribus:linguas_sk_SK - Language support for sk_SK
app-office/scribus:linguas_th_TH - Language support for th_TH
app-office/scribus:minimal - Don't install headers (only required for e.g. plug-in developers)
app-office/scribus:osg - 3D redering via dev-games/openscenegraph
app-office/scribus:scripts - Install the scripts
app-office/scribus:templates - Document tamplates
app-office/scribus:tk - Install tk based scripts e.g. FontSample.py
app-office/texmacs:netpbm - Add support for media-libs/netpbm
app-office/texstudio:video - Use phonon for video embedding
app-pda/barry:boost - Enable boost support
app-pda/barry:desktop - Install the GUI desktop control panel
app-pda/barry:gui - Install the GUI backup tool
app-pda/barry:opensync - Install the barry-sync plugin for OpenSync 0.22
app-pda/gtkpod:clutter - Enable clutter support for displaying coverart
app-pda/gtkpod:webkit - Enable webkit support for finding coverart
app-pda/libopensync-plugin-irmc:irda - Enable infrared support
app-pda/libopensync-plugin-syncml:http - Enable http transports
app-pda/libopensync-plugin-syncml:obex - Enable obex transports
app-pda/libplist:python - Build swig-based python bindings
app-pda/libsyncml:http - Enable http transports
app-pda/libsyncml:obex - Enable obex transports
app-pda/synce-sync-engine:opensync - Enable OpenSync (app-pda/libopensync) python plug-in
app-portage/conf-update:colordiff - Use colors when displaying diffs (app-misc/colordiff)
app-portage/eix:clang - Use sys-devel/clang for building
app-portage/eix:debug - Build with upstream's CXXFLAGS/LDFLAGS for debugging support; not recommended for normal use.
app-portage/eix:dep - Make DEP=true the default which enables support for {,R,P}DEPEND but requires roughly double disk and memory.
app-portage/eix:doc - Create description of the eix cache file additionally in html format
app-portage/eix:optimization - Accept upstream's choices for CXXFLAGS/LDFLAGS for optimization. Absense of this USE flag does not strip user's *FLAGS
app-portage/eix:security - This adds some checks which can prevent certain exploits if e.g. the eix code has a bug. If you use the hardened toolchain, using this flag does not increase security and can even lead to problems.
app-portage/eix:sqlite - Compile in support for portage's sqlite backend; to actually use it you need additional configuration of portage and eix
app-portage/eix:strong-optimization - Adds several more agressive CXXFLAGS/LDFLAGS for optimization like graphite (if available). May cause trouble with some buggy compiler versions. Absense of this USE flag does not strip user's *FLAGS
app-portage/eix:strong-security - Add many checks to prevent exploits if eix code has a bug. This will slow down eix considerably. Use only if you are paranoid or have reasons to suspect a bug.
app-portage/eix:swap-remote - Swap role of remote addresses in eix-remote, making the data from gpo.zugaina.org the first choice.
app-portage/eix:tools - Create separate binary for script helper tools; useful if they are called extremely often
app-portage/layman:bazaar - Support dev-vcs/bzr based overlays
app-portage/layman:cvs - Support dev-vcs/cvs based overlays
app-portage/layman:darcs - Support dev-vcs/darcs based overlays
app-portage/layman:git - Support dev-vcs/git based overlays
app-portage/layman:gpg - Support app-crypt/gnupg signed overlays lists and manifests
app-portage/layman:mercurial - Support dev-vcs/mercurial based overlays
app-portage/layman:subversion - Support dev-vcs/subversion based overlays
app-portage/pfl:network-cron - Adds a cron job which does a weekly submit of the package database
app-portage/tatt:templates - Install template scripts to be used with tatt
app-shells/bash:bashlogger - Log ALL commands typed into bash; should ONLY be used in restricted environments such as honeypots
app-shells/bash:mem-scramble - Build with custom malloc/free overwriting allocated/freed memory
app-shells/bash:net - Enable /dev/tcp/host/port redirection
app-shells/bash:plugins - Add support for loading builtins at runtime via 'enable'
app-shells/pdsh:rsh - This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.
app-shells/scsh-install-lib:scsh - Use a non-FHS directory layout
app-shells/shish:diet - Use dev-libs/dietlibc
app-shells/tcsh:catalogs - Add support for NLS catalogs
app-text/acroread:html - HTML support and help reading capability (only for x86).
app-text/asciidoc:highlight - Enable source code highlighting
app-text/calibre:udisks - Add run-time dependency on sys-fs/udisks in order to mount and unmount reading devices.
app-text/crm114:mew - Add support for using the mewdecode mime decoder (app-emacs/mew)
app-text/crm114:mimencode - Add support for using the mimencode mime (net-mail/metamail)
app-text/crm114:normalizemime - Add support for using the normalizemime (mail-filter/normalizemime)
app-text/cuneiform:graphicsmagick - Enables support of various input formats using media-gfx/graphicsmagick. Otherwise only uncompressed BMP files are supported.
app-text/cuneiform:imagemagick - Enables support of various input formats using media-gfx/imagemagick. Otherwise only uncompressed BMP files are supported.
app-text/dbacl:interactive - Enable the interactive mailinspect ability
app-text/dictd:judy - Build Judy-based (dev-libs/judy) plugin implementing fast "exact" and especially "lev" strategies
app-text/dictd:minimal - Don't build server but dict client, dictzip and dictfmt only.
app-text/docbook-sgml-utils:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/docbook-xsl-ns-stylesheets:ruby - Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-admin/eselect-ruby.
app-text/docbook-xsl-stylesheets:ruby - Install the Ruby-based dbtoepub script; requires an interpreter compatible with app-admin/eselect-ruby.
app-text/dvipng:t1lib - Enable support for T1lib font rendering (media-libs/t1lib)
app-text/enchant:aspell - Adds support for app-text/aspell spell checker
app-text/enchant:hunspell - Adds support for app-text/hunspell spell checker
app-text/enchant:zemberek - Adds support for app-text/zemberek-server spell checker server
app-text/evince:dvi - Enable the built-in DVI viewer
app-text/evince:gnome - Enable the use of gnome-base/gconf to honour lockdown settings
app-text/evince:libsecret - Enable support for credentials store
app-text/evince:nautilus - Enable property page extension in gnome-base/nautilus
app-text/evince:t1lib - Enable the Type-1 fonts for the built-in DVI viewer (media-libs/t1lib)
app-text/evince:xps - Enable XPS viewer using app-text/libgxps
app-text/getxbook:ocr - Use app-text/tesseract for optical character recognition
app-text/ghostscript-gpl:bindist - Disable dejavu support for binary distribution because of licensing issue
app-text/glark:zip - Support for ZIP files using dev-ruby/rubyzip
app-text/gtkspell:vala - Enable bindings for dev-lang/vala
app-text/gtranslator:http - Enable support for open translation plugin using net-libs/libsoup
app-text/hyperestraier:mecab - Enable app-text/mecab support for Estraier
app-text/jmupdf:system-mupdf - Link against system version of app-text/mupdf
app-text/lcdf-typetools:kpathsea - Enable integration with kpathsea search library (TeX related)
app-text/libgxps:introspection - Use dev-libs/gobject-introspection for introspection
app-text/liblangtag:introspection - Use dev-libs/gobject-introspection for introspection
app-text/libwpd:tools - Build miscellaneous tools
app-text/lodgeit:vim - Install a vim plugin allowing to paste and download from within vim
app-text/mate-document-viewer:caja - Enable property page extension in mate-base/mate-file-manager
app-text/mate-document-viewer:dvi - Enable build-in DVI viewer
app-text/mate-document-viewer:ps - Enable build-in postscript viewer
app-text/mate-document-viewer:t1lib - Enable the Type-1 fonts for the build-in DVI viewer (media-libs/t1lib)
app-text/mate-document-viewer:xps - Enable XPS viewer using app-text/libxps
app-text/mathtex:png - Generate png images by default instead of gif
app-text/pandoc:embed_data_files - Embed data files in binary for relocatable executable.
app-text/pandoc:http-conduit - Enable downloading of resources over https.
app-text/pastebinit:crypt - Install pbputs for gpg-encrypted pastes
app-text/pdf2djvu:graphicsmagick - Enable media-gfx/graphicsmagick support
app-text/pdfgrep:unac - Removing accents and ligatures before search
app-text/pelican:markdown - Markdown support
app-text/podofo:boost - Add support for boost
app-text/poppler:introspection - Enable GObject introspection.
app-text/poppler:utils - Install command-line PDF converters and various utilities.
app-text/qpdfview:synctex - Add support for searching TeX sources
app-text/sgmltools-lite:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/stardict:espeak - Enable text to speech synthesizer using espeak engine
app-text/stardict:gucharmap - Enable gucharmap dictionary plugin
app-text/stardict:pronounce - Install WyabdcRealPeopleTTS package (it is just many .wav files) to make StarDict pronounce English words
app-text/stardict:qqwry - Enable QQWry plugin, which provides information (in Chinese language) about geographical positions, owner, etc. for IP addresses
app-text/stardict:tools - Build and install the extra stardict tools
app-text/tesseract:linguas_chr - Enable support for the Cherokee language.
app-text/tesseract:linguas_jp - Enable support for Japanese.
app-text/tesseract:osd - Enable support orientation and script detection.
app-text/tesseract:scrollview - Enable graphics support (ScrollView).
app-text/tesseract:webp - Enable support for webp image format.
app-text/texlive:context - Add support for the ConTeXt format (dev-texlive/texlive-context)
app-text/texlive:detex - Add support for dev-tex/detex, a filter program that removes the LaTeX (or TeX) control sequences
app-text/texlive:dvi2tty - Add support for dev-tex/dvi2tty to preview dvi-files on text-only devices
app-text/texlive:dvipdfm - Add support for app-text/dvipdfm to convert DVI files to PDF
app-text/texlive:epspdf - Add support for app-text/epspdf, a tool for converting [e]ps files to pdf.
app-text/texlive:extra - Add support for extra TeXLive packages
app-text/texlive:games - Add typesetting support for games (chess, etc.) (dev-texlive/texlive-games)
app-text/texlive:graphics - Add support for several graphics packages (pgf, tikz,...)
app-text/texlive:humanities - Add LaTeX support for the humanities (dev-texlive/texlive-humanities)
app-text/texlive:jadetex - Add support for app-text/jadetex (for processing tex files produced by the TeX backend of Jade)
app-text/texlive:luatex - Add extra support for luatex
app-text/texlive:metapost - Add support for metapost: A tool for creating graphics in scalable PostScript.
app-text/texlive:music - Add support for music typesetting (dev-texlive/texlive-music)
app-text/texlive:omega - Add omega packages (dev-texlive/texlive-omega)
app-text/texlive:pdfannotextractor - Add dev-tex/pdfannotextractor support, for extracting annotations from PDF files.
app-text/texlive:pstricks - Add pstricks packages (dev-texlive/texlive-pstricks)
app-text/texlive:publishers - Add support for publishers (dev-texlive/texlive-publishers)
app-text/texlive:science - Add typesetting support for natural and computer sciences (dev-texlive/texlive-science)
app-text/texlive:tex4ht - Add support for dev-tex/tex4ht (for converting (La)TeX to (X)HTML, XML and OO.org)
app-text/texlive:texi2html - Add support for app-text/texi2html which converts texi files to HTML.
app-text/texlive:xetex - Add support for XeTeX macros (dev-texlive/texlive-xetex)
app-text/texlive:xindy - Add support for app-text/xindy, a flexible indexing system
app-text/texlive-core:xetex - Add support for XeTeX: a TeX system with Unicode and modern font technologies.
app-text/u2ps:fonts - Install a more complete set of unicode fonts
app-text/wdiff:experimental - Build experimental utilities (mdiff, unify, wdiff2)
app-text/webgen:builder - Enable programmatic HTML/XML generation
app-text/webgen:highlight - Enable syntax highlighting for certain plugins
app-text/webgen:markdown - Markdown support
app-text/wgetpaste:lodgeit-default - Set one of lodgeit-like (ex http://paste.pocoo.org) services as default
app-text/wklej:vim - Install the vim plugin allowing to paste through ':Wklej'.
app-text/writerperfect:gsf - Add support for structured files using gnome-extra/libgsf
app-text/writerperfect:mspub - Add support to mspub format using app-text/libmspub
app-text/writerperfect:mwaw - Add support to mwaw formats using app-text/libmwaw
app-text/writerperfect:visio - Add support for visio format using media-libs/libvisio
app-text/writerperfect:wpg - Add support for wpg format using app-text/libwpg
app-text/writerperfect:wps - Add support for wps format using app-text/libwps
app-text/wv:tools - Install optional utilities considered deprecated in favor of using AbiWord.
app-text/xiphos:webkit - Use net-libs/webkit-gtk instead of gnome-extra/gtkhtml
app-text/yagf:cuneiform - Enable support for the app-text/cuneiform OCR engine.
app-text/yagf:tesseract - Enable support for the app-text/tesseract OCR engine.
app-text/zathura:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-text/zathura:magic - Use libmagic to determine mimetypes
app-text/zathura-cb:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-text/zathura-djvu:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-text/zathura-meta:cb - Install plug-in for ComicBook support
app-text/zathura-meta:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-text/zathura-pdf-mupdf:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-text/zathura-pdf-poppler:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-text/zathura-ps:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
app-vim/gentoo-syntax:ignore-glep31 - Remove GLEP 31 (UTF-8 file encodings) settings
app-vim/vim-latex:html - Install HTML documentation
app-vim/vim-latex:python - Enable python support which can help speed up some functionality
app-vim/youcompleteme:clang - Enable semantic support for C-family languages using sys-devel/clang
dev-cpp/glog:gflags - Use dev-cpp/gflags for flag parsing
dev-cpp/glog:unwind - Use sys-libs/libunwind for stack unwinding instead of glibc/gcc (may be more reliable on x86_64)
dev-cpp/libcmis:man - Build and install man pages.
dev-cpp/pficommon:fcgi - Build FCGI feature
dev-cpp/pficommon:mprpc - Build MessagePack RPC feature
dev-cpp/xsd:ace - Enable support for serializing to/from an ACE CDR stream
dev-db/drizzle:curl - Enable the HTTP authentication plugin (using net-misc/curl). This is needed for the tests to apply properly.
dev-db/drizzle:doc - Build the API documentation for the package, using app-doc/doxygen. Warning, this might take over an hour on slower machines.
dev-db/drizzle:gearman - Enable the gearman plugins for user-defined functions and logging (using sys-cluster/gearman).
dev-db/drizzle:haildb - Use the dev-db/haildb libraries to replace the innodb plugin storage engine with haildb (an innodb fork).
dev-db/drizzle:md5 - Enable the MD5 plugin, using dev-libs/libgcrypt; this replaces the older openssl and gnutls USE flags.
dev-db/drizzle:memcache - Enable the memcache plugin for user-defined functions and statistics in I_S tables (using dev-libs/libmemcached). Currently restricts tests because of an upstream testsuite bug.
dev-db/drizzle:pam - Enable the PAM authentication plugin (using sys-libs/pam). The configuration file created will be /etc/pam.d/drizzle.
dev-db/drizzle:v8 - Use dev-lang/v8.
dev-db/firebird:client - Install client library and header files only
dev-db/firebird:superserver - Install SuperServer
dev-db/firebird:xinetd - Install ClassicServer
dev-db/haildb:debug - Enable extra debug codepaths and assertions. If disabled, both the debug code and assertions are removed from the resulting binaries. Optimisations are untouched.
dev-db/haildb:zlib - Add support for compressed tables through sys-libs/zlib.
dev-db/maatkit:udf - Build the MySQL UDFs shipped with maatkit, requires non-minimal MySQL
dev-db/mariadb:big-tables - Make tables contain up to 1.844E+19 rows
dev-db/mariadb:cluster - Add support for NDB clustering (deprecated)
dev-db/mariadb:community - Enables the community features from upstream.
dev-db/mariadb:embedded - Build embedded server (libmysqld)
dev-db/mariadb:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mariadb:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/mariadb:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mariadb:libevent - Use libevent for connection handling
dev-db/mariadb:max-idx-128 - Raise the max index per table limit from 64 to 128
dev-db/mariadb:minimal - Install client programs only, no server
dev-db/mariadb:oqgraph - Add support for the Open Query GRAPH engine
dev-db/mariadb:pbxt - Add experimental support for PBXT storage engine
dev-db/mariadb:profiling - Add support for statement profiling (requires USE=community).
dev-db/mariadb:sphinx - Add suport for the sphinx full-text search engine
dev-db/mariadb:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mariadb:test - Install upstream testsuites for end use.
dev-db/mongodb:mms-agent - Install the MongoDB Monitoring Service agent
dev-db/mongodb:sharedclient - build client shared library libmongoclient.so
dev-db/mongodb:spidermonkey - Use embedded SpiderMonkey engine (dev-lang/spidermonkey) instead of v8
dev-db/mysql:big-tables - Make tables contain up to 1.844E+19 rows
dev-db/mysql:cluster - Add support for NDB clustering (deprecated)
dev-db/mysql:community - Enables the community features from upstream.
dev-db/mysql:embedded - Build embedded server (libmysqld)
dev-db/mysql:extraengine - Add support for alternative storage engines (Archive, CSV, Blackhole, Federated(X), Partition)
dev-db/mysql:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/mysql:latin1 - Use LATIN1 encoding instead of UTF8
dev-db/mysql:max-idx-128 - Raise the max index per table limit from 64 to 128
dev-db/mysql:minimal - Install client programs only, no server
dev-db/mysql:pbxt - Add experimental support for PBXT storage engine
dev-db/mysql:profiling - Add support for statement profiling (requires USE=community).
dev-db/mysql:raid - Deprecated option, removed in the 5.0 series
dev-db/mysql:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-db/mysql:test - Install upstream testsuites for end use.
dev-db/mysql:xtradb - Add experimental support for Percona's InnoDB replacement: XtraDB
dev-db/mysql-connector-c++:gcov - Build coverage support
dev-db/opendbx:bindist - Disable support for dev-db/firebird database which is not GPL compatible.
dev-db/pgadmin3:databasedesigner - Enable the Database Designer component
dev-db/pgbouncer:libevent - Use libevent 2.0+ and evdns as the DNS backend
dev-db/pgbouncer:udns - Use udns as the DNS backend. Supports IPv4 only.
dev-db/pgpool2:memcached - Use memcached for query caching.
dev-db/phpmyadmin:setup - Installs the phpMyAdmin setup utility. Users who don't use the utility should disable this USE flag for security reasons as the setup tool was the target of various exploits in the past.
dev-db/postgis:geos - Add the sci-libs/geos library for exact topological tests
dev-db/postgis:gtk - Build shp2pgsql-gui a graphical interface to shp2pgsql
dev-db/postgis:proj - Add the sci-libs/proj library for reprojection features
dev-db/postgresql-base:pg_legacytimestamp - Use double precision floating-point numbers instead of 64-bit integers for timestamp storage.
dev-db/postgresql-server:pg_legacytimestamp - Use double precision floating-point numbers instead of 64-bit integers for timestamp storage.
dev-db/postgresql-server:uuid - Enable server side UUID generation (via dev-libs/ossp-uuid)
dev-db/psqlodbc:iodbc - Use dev-db/libiodbc. Disable to use dev-db/unixODBC.
dev-db/recutils:curl - Enable support for remote descriptors using libcurl
dev-db/recutils:mdb - Build the mdb2rec utility
dev-db/redis:jemalloc - Use dev-libs/jemalloc for allocations.
dev-db/redis:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations.
dev-db/spatialite:geos - Add the sci-libs/geos library for exact topological tests
dev-db/spatialite:proj - Add the sci-libs/proj library for reprojection features
dev-db/spatialite:xls - Add the dev-libs/freexl library for xls import support
dev-db/sqlite:secure-delete - Overwrite deleted information with zeros in addition to marking the space as available for reuse. This causes a performance penalty.
dev-db/unixODBC:minimal - Disable bundled drivers and extra libraries (most users don't need these)
dev-db/unixODBC:odbcmanual - Administrator, Internal Structure, Programmer and User documentation
dev-embedded/avrdude:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-embedded/libftdi:tools - build ftdi_eeprom helper tool
dev-embedded/msp430-binutils:multislot - Allow for multiple versions of binutils to be emerged at once for same CTARGET
dev-embedded/msp430-binutils:multitarget - Adds support to binutils for cross compiling (does not work with gas)
dev-embedded/msp430-gcc:fixed-point - Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
dev-embedded/msp430-gcc:go - Build the GCC Go language frontend.
dev-embedded/msp430-gcc:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation
dev-embedded/msp430-gcc:libssp - Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)
dev-embedded/msp430-gcc:mudflap - Add support for mudflap, a pointer use checking library
dev-embedded/msp430-gcc:multislot - Allow for SLOTs to include minor version (3.3.4 instead of just 3.3)
dev-embedded/msp430-gcc:objc - Build support for the Objective C code language
dev-embedded/msp430-gcc:objc++ - Build support for the Objective C++ language
dev-embedded/msp430-gcc:objc-gc - Build support for the Objective C code language Garbage Collector
dev-embedded/msp430-gdb:multitarget - Support all known targets in one gdb binary
dev-embedded/msp430-gdb:python - Enable support for the new internal scripting language, as well as extended pretty printers
dev-embedded/openocd:blaster - Enable support for Altera USE-Blaster
dev-embedded/openocd:dummy - Build the dummy port driver
dev-embedded/openocd:ftd2xx - Enable support for USB FTDI chips via dev-embedded/libftd2xx
dev-embedded/openocd:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-embedded/openocd:minidriver - Build the dummy minidriver
dev-embedded/openocd:parport - Enable support for parport JTAG devices
dev-embedded/openocd:presto - Enable support for AXIS PRESTO devices
dev-embedded/openocd:segger - Enable support for the Segger J-Link JTAG
dev-embedded/openocd:stlink - Enable building support for the ST-Link JTAG Programmer
dev-embedded/openocd:verbose-io - Verbose IO and comm JTAG and USB messages
dev-embedded/openocd:versaloon - Enable building support for the Versallon-lInk JTAG
dev-embedded/ponyprog:epiphany - Enable support for www-client/epiphany
dev-embedded/sdcc:boehm-gc - Enable Hans Boehm's garbage collector (dev-libs/boehm-gc)
dev-embedded/urjtag:ftd2xx - Enable support for USB FTDI chips via dev-embedded/libftd2xx
dev-embedded/urjtag:ftdi - Enable support for USB FTDI chips via dev-embedded/libftdi
dev-games/aseprite:memleak - Enable memory-leaks detector (only for developers)
dev-games/aseprite:static - Link against static version of C and C++ runtimes
dev-games/cegui:devil - Build the DevIL based ImageCodec module
dev-games/cegui:freeimage - Build the FreeImage based ImageCodec module
dev-games/cegui:irrlicht - Enable the Irrlicht renderer
dev-games/cegui:ogre - Enable the OGRE renderer
dev-games/cegui:tinyxml - Enable the Tiny XML parser module
dev-games/cegui:xerces-c - Enable the Xerces-C++ XML parser module
dev-games/cegui:zip - Enable the Minizip resource provider
dev-games/crystalspace:3ds - Enables support for .3DS files in CrystalSpace
dev-games/crystalspace:bullet - include support for Bullet library
dev-games/crystalspace:cal3d - include support for skeleton animation
dev-games/crystalspace:cegui - include support for Crazy Eddie GUI
dev-games/crystalspace:cg - NVIDIA toolkit plugin
dev-games/crystalspace:ode - include support for Open Dynamics Engine
dev-games/guichan:allegro - Build the Allegro frontend
dev-games/mygui:linguas_ru - Install some additional russian docs if 'doc' useflag enabled
dev-games/mygui:plugins - Build MyGUI plugins
dev-games/mygui:samples - Install MyGUI demos
dev-games/mygui:tools - Build the tools for development
dev-games/ode:double-precision - more precise calculations at the expense of speed
dev-games/ode:gyroscopic - enable gyroscopic term (may cause instability)
dev-games/ogre:boost - enable boost support
dev-games/ogre:cg - NVIDIA toolkit plugin
dev-games/ogre:double-precision - more precise calculations at the expense of speed
dev-games/ogre:freeimage - support images via freeimage
dev-games/ogre:gles2 - build OpenGL ES 2.x RenderSystem
dev-games/ogre:ois - pull in Object-oriented Input System library for samples
dev-games/ogre:poco - when USE=threads, use poco for threading
dev-games/ogre:tbb - when USE=threads, use tbb for threading
dev-games/ogre:tools - build+install helper tools
dev-games/ogre:zip - support zip archives
dev-games/openscenegraph:fox - Build examples using x11-libs/fox library
dev-games/openscenegraph:gdal - Enable support for sci-libs/gdal library
dev-games/openscenegraph:itk - Build dev-tcltk/itk plugin
dev-games/openscenegraph:openinventor - Build OpenInventor plugin
dev-games/openscenegraph:osgapps - Build osg applications
dev-games/openscenegraph:xrandr - Enable support for the X xrandr extension
dev-games/physfs:grp - Enable Build Engine GRP archive support
dev-games/physfs:hog - Enable Descent I/II HOG archive support
dev-games/physfs:mvl - Enable Descent I/II MVL archive support
dev-games/physfs:qpak - Enable Quake I/II QPAK archive support
dev-games/physfs:wad - Enable Doom WAD archive support
dev-games/physfs:zip - Enable ZIP archive support
dev-haskell/abstract-deque:usecas - Enable the reference implementation to use hardware compare-and-swap.
dev-haskell/aeson:developer - Operate in developer mode.'
dev-haskell/aeson-pretty:lib-only - don't build 'aeson-pretty' executable.
dev-haskell/ansi-terminal:example - Build the example application.
dev-haskell/ansi-wl-pprint:example - Build the example application.
dev-haskell/cabal-install:noprefs - Ignore 'preferred-versions' file from hackage's tarball.
dev-haskell/certificate:executable - Build the executable
dev-haskell/cgi:extensible-exceptions-in-base - Required to be enabled for >=dev-lang/ghc-7.
dev-haskell/citeproc-hs:bibutils - use Chris Putnam's app-text/bibutils
dev-haskell/citeproc-hs:embed_data_files - Embed locale files into the library (needed for windows packaging)
dev-haskell/citeproc-hs:hexpat - use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
dev-haskell/citeproc-hs:network - use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
dev-haskell/citeproc-hs:small_base - Choose the new smaller, split-up base package.
dev-haskell/citeproc-hs:unicode_collation - Use Haskell bindings to the dev-libs/icu
dev-haskell/cmdargs:quotation - Build quote module
dev-haskell/cmdargs:testprog - Build the test program
dev-haskell/comonad:test-doctests - Run the doctests test suite
dev-haskell/conduit:nohandles - experimental code to use raw system calls in place of handles. Not recommended for general use
dev-haskell/cpu:executable - build 'cpuid' tool
dev-haskell/crypto-api:all_cpolys - Build all the CMAC polynomes up to 10000 bits instead of just the usual ones
dev-haskell/crypto-pubkey:benchmark - Build benchmarks.
dev-haskell/cryptohash:cryptoapi - Defines crypto-api instances
dev-haskell/distributive:lib-werror - Compile with the ghc -Werror option
dev-haskell/filestore:maxcount - Make use of a recent (>= 2.3.0) Darcs feature which vastly improves the performance of 'latest'. You should disable this flag if you plan to use gitit with an older version of Darcs, or 'latest' will raise an error.
dev-haskell/glib:closure_signals - Use the the GClosure-based signals implementation.
dev-haskell/glut:usenativewindowslibraries - When compiling under Windows, use the native libraries instead of e.g. the ones coming with Cygwin.
dev-haskell/gtk:gio - Add glib's GIO bindings.
dev-haskell/gtk2hs-buildtools:closuresignals - Use the the GClosure-based signals implementation.
dev-haskell/happstack-server:template_haskell - Description: Template Haskell is available on this system
dev-haskell/hashable:sse4_1 - Enable optimization for SSE4_1 capable processors (Intel Core 2 Penryn and later chips)
dev-haskell/hashtables:bounds-checking - if on, use bounds-checking array accesses
dev-haskell/hashtables:portable - if on, use only pure Haskell code and no GHC extensions.
dev-haskell/hashtables:sse4_1 - Enable optimization for SSE4_1 capable processors (Intel Core 2 Penryn and later chips)
dev-haskell/hashtables:unsafe-tricks - turn on unsafe GHC tricks
dev-haskell/highlighting-kate:executable - Build the Highlight executable.
dev-haskell/highlighting-kate:pcre-light - Use the pcre-light library instead of regex-pcre-builtin.
dev-haskell/hslogger:buildtests - Build the executable to run unit tests.
dev-haskell/hsopenssl:fast-bignum - Enable fast moving of bignums between OpenSSL and GMP (GHC Only)
dev-haskell/hstringtemplate:quasi-quotation - Build module providing a quasi-quoter
dev-haskell/hstringtemplate:syb-with-class - Generic instances for TOSElem
dev-haskell/json:generic - Add support for generic encoder (dev-haskell/syb)
dev-haskell/json:parsec - Add support for parsing with Parsec
dev-haskell/json:pretty - Add support for using pretty printing combinators
dev-haskell/lens:benchmark-uniplate - Enable benchmarking against Neil Mitchell's uniplate library for comparative performance analysis. Defaults to being turned off to avoid the extra dependency.
dev-haskell/lens:dump-splices - Build and run the doctests test-suite.
dev-haskell/lens:inlining - Generate inline pragmas when using template-haskell. This defaults to enabled, but you can to shut it off to benchmark the relative performance impact, or as last ditch effort to address compile errors resulting from the myriad versions of template-haskell that all purport to be 2.8.
dev-haskell/lens:lib-werror - Turn on ghc-options: -Werror
dev-haskell/lens:old-inline-pragmas - Some 7.6.1-rc1 users report their TH still uses old style inline pragmas. This lets them turn on inlining.
dev-haskell/lens:safe - Disallow unsafeCoerce
dev-haskell/lens:test-doctests - Build and run the doctests test-suite.
dev-haskell/lens:test-hunit - You can disable the hunit test suite with -f-test-hunit
dev-haskell/lens:test-properties - Build the properties test if we're building tests
dev-haskell/lens:trustworthy - Assert that we are trustworthy when we can
dev-haskell/monad-control:instancest - If enabled this package will export MonadBaseControl instances for the lazy and strict ST monad. If disabled these instances are only exported when base >= 4.4. If enabled it is required that the transformer-base package exports MonadBase instances for ST. It will do this by default.
dev-haskell/monad-logger:template_haskell - Enable Template Haskell support.
dev-haskell/monad-par:chaselev - Use Chase-Lev Deques for higher-perf work-stealing.
dev-haskell/pandoc-citeproc:bibutils - use Chris Putnam's app-text/bibutils
dev-haskell/pandoc-citeproc:embed_data_files - Embed locale files into the library (needed for windows packaging)
dev-haskell/pandoc-citeproc:hexpat - use dev-haskell/hexpat instead of dev-haskell/xml for XML parsing
dev-haskell/pandoc-citeproc:network - use dev-haskell/network and dev-haskell/http to retrieve CSL file from URIs
dev-haskell/pandoc-citeproc:small_base - Choose the new smaller, split-up base package.
dev-haskell/pandoc-citeproc:unicode_collation - Use Haskell bindings to the dev-libs/icu
dev-haskell/persistent:nooverlap - Use OverlappingInstances only for String. Only developers should use this.
dev-haskell/persistent-sqlite:systemlib - Use the system-wide sqlite library
dev-haskell/quickcheck:template_haskell - Enable additional test modules requiring Template Haskell support.
dev-haskell/rfc5051:mkunicodedata - build codes generator itself
dev-haskell/sendfile:portable - Explicitly enable portable sendfile support (implemented in Haskell)
dev-haskell/sha:exe - Build a sha1 and a sha384 executable similar to 'md5sum'.
dev-haskell/shakespeare:test_export - Test export.
dev-haskell/shakespeare-js:test_coffee - Test coffee.
dev-haskell/shakespeare-js:test_export - Test export.
dev-haskell/shakespeare-js:test_roy - Test roy.
dev-haskell/simple-sendfile:allow-bsd - Allow use of BSD sendfile (disable on GNU/kFreeBSD)
dev-haskell/skein:big-endian - When manually selecting the endianness, use big-endian (default is little-endian).
dev-haskell/skein:force-endianness - Use a manually selected endian when compiling (see flag 'big-endian').
dev-haskell/skein:reference - Use the reference implementation instead of the optimized one.
dev-haskell/snap-core:portable - No non-haskell unportable code.
dev-haskell/snap-server:openssl - enable https support using dev-haskell/hsopenssl
dev-haskell/snap-server:portable - no non-haskell unportable code.
dev-haskell/tagsoup:download - Build with Download module.
dev-haskell/tasty:colors - Enable colorful output
dev-haskell/texmath:cgi - Build texmath-cgi executable.
dev-haskell/text:developer - operate in developer mode
dev-haskell/tls:compat - Accept SSLv2 compatible handshake
dev-haskell/unix-compat:old-time - build against old-time package
dev-haskell/vector:boundschecks - Enable bounds checking
dev-haskell/vector:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty
dev-haskell/vector:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty
dev-haskell/vector-algorithms:bench - Build a benchmarking program.
dev-haskell/vector-algorithms:boundschecks - Enable bounds checking.
dev-haskell/vector-algorithms:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty.
dev-haskell/vector-algorithms:properties - Enable quickcheck tests.
dev-haskell/vector-algorithms:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty.
dev-haskell/void:safe - dissable effective but unsafe coersions
dev-haskell/wai-app-static:print - print debug info.
dev-haskell/warp:allow-sendfilefd - Allow use of sendfileFd (not available on GNU/kFreeBSD).
dev-haskell/x11:screensaver - whether to build XScreenSaver.
dev-haskell/x509-store:executable - Build the executable
dev-haskell/yaml:no-exe - don't install the yaml2json executable
dev-haskell/yaml:system-libyaml - Use system libyaml instead on generic one
dev-haskell/zip-archive:executable - Build the Zip executable.
dev-java/ant:antlr - Enable ANTLR Ant tasks
dev-java/ant:bcel - Enable bcel (bytecode manipulation) Ant tasks
dev-java/ant:commonslogging - Enable commons-logging Ant tasks
dev-java/ant:commonsnet - Enable commons-net Ant tasks
dev-java/ant:jai - Enable JAI (Java Imaging) Ant task
dev-java/ant:javamail - Enable JavaMail Ant task
dev-java/ant:jdepend - Enable Jdepend Ant tasks
dev-java/ant:jmf - Enable JMF (Java Media Framework) Ant tasks
dev-java/ant:jsch - Disable Jsch (ssh, scp and related) Ant tasks
dev-java/ant:log4j - Enable Apache log4j Ant tasks
dev-java/ant:oro - Enable Apache Oro Ant tasks
dev-java/ant:regexp - Enable Apache Regexp Ant tasks
dev-java/ant:resolver - Enable Apache Resolver Ant tasks
dev-java/ant:testutil - Enable optional test util classes
dev-java/antlr:gunit - gUnit is a "Unit Test" framework for ANTLR grammars
dev-java/antlr:script - Install a script to run antlr
dev-java/bcel:findbugs - Include performance patch for findbugs package.
dev-java/commons-collections:test-framework - Install the test framework
dev-java/commons-logging:avalon-framework - Add optional support for avalon-framework
dev-java/commons-logging:avalon-logkit - Add optional support for avalon-logkit
dev-java/commons-logging:log4j - Add optional support for log4j
dev-java/commons-logging:servletapi - Add optional support for servletapi
dev-java/commons-modeler:commons-digester - Add support for the commons-digester based Mbeans Descriptor source
dev-java/diablo-jdk:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/ecj-gcj:native - Build a native binary along with the jar. Provides faster execution time, but needs about 1G memory and some patience to compile.
dev-java/eclipse-ecj:ant - Support using ecj in Ant builds via dev-java/ant-eclipse-ecj
dev-java/emma:launcher - Install /usr/bin/emma. Collides with sci-biology/emboss.
dev-java/fop:hyphenation - Precompile hyphenation patterns from the dev-java/offo-hyphenation package and install them as fop-hyph.jar
dev-java/fop:jai - Enable jai support
dev-java/fop:jimi - Enable jimi support
dev-java/gjdoc:xmldoclet - Also build support for the xml doclet that generates output in xml instead of the traditional html javadoc.
dev-java/gnu-classpath:alsa - Build with ALSA javax.sound.midi provider
dev-java/gnu-classpath:dssi - Build with DSSI javax.sound.midi provider
dev-java/gnu-classpath:gconf - Build with GConf preferences backend
dev-java/gnu-classpath:gjdoc - Build GJDoc, a documentation generator
dev-java/gnu-classpath:gmp - Build with GMP backend for java.math.BigInteger
dev-java/gnu-classpath:gstreamer - Build with GStreamer javax.sound.sampler provider
dev-java/gnu-classpath:gtk - Build with Gtk+ AWT peers
dev-java/gnu-classpath:qt4 - Build with Qt4 AWT peers
dev-java/gnu-classpath:xml - Build with native XML backend
dev-java/httpcomponents-client:deprecated - Build deprecated classes
dev-java/httpcomponents-core:deprecated - Build deprecated classes
dev-java/ibm-jdk-bin:javacomm - Enable Java Communications API support
dev-java/icedtea:X - Make X buildtime-only depenency.
dev-java/icedtea:alsa - Make alsa buildtime-only dependency.
dev-java/icedtea:cacao - Build CACAO virtual machine on platforms supporting HotSpot. (experimental)
dev-java/icedtea:cups - Make CUPS build-only dependency.
dev-java/icedtea:jbootstrap - If possible, recompile the final IcedTea executables with itself.
dev-java/icedtea:nsplugin - Enable browser plugin (NPPlugin), requires also the webstart flag to be enabled.
dev-java/icedtea:nss - Enable NSS security provider support.
dev-java/icedtea:pax_kernel - For building when running a PaX enabled kernel.
dev-java/icedtea:systemtap - Enable SystemTap probes in HotSpot.
dev-java/icedtea:webstart - Enable Web Start support (via NetX).
dev-java/icedtea-web:icedtea7 - Build icedtea-7 support in addition to icedtea-6 support. Requires icedtea{-bin}-7
dev-java/icedtea-web:javascript - Enable support for using proxy auto config (PAC) files.
dev-java/icedtea-web:nsplugin - Enable the browser plugin (NPPlugin).
dev-java/itext:rtf - Build and provide libraries for rich text format
dev-java/itext:rups - Build and provide GUI for Reading/Updating PDF Syntax
dev-java/jcs:admin - Enable JCS Admin servlets
dev-java/jdbc-jaybird:jni - Build/Install JDBC Type 2 native components
dev-java/jdbc-mysql:c3p0 - Enable c3p0 support
dev-java/jdbc-mysql:log4j - Enable log4 support
dev-java/jdbc-oracle-bin:dms - Enable support for the Oracle Dynamic Monitoring Service
dev-java/jdbc-oracle-bin:ons - Enable support for the Oracle Notification Services (ONS) deamon
dev-java/jfreechart:servlet - Build a servlet using the servlet API.
dev-java/jna:awt - Enables support for Java AWT
dev-java/jna:nio-buffers - Enables support for NIO buffers
dev-java/jython:readline - Use GNU readline instead of jline
dev-java/jython:servletapi - Add optional support for servlet-api
dev-java/log4j:javamail - Build the SMTPAppender
dev-java/log4j:jms - Build the JMSAppender
dev-java/log4j:jmx - Build org.apace.log4j.jmx
dev-java/logback:tomcat - Builds Apache Tomcat support
dev-java/lucene:contrib - Include extra functionality from contrib/
dev-java/miglayout:swt - Add support for the SWT toolkit.
dev-java/netbeans-nb:keychain - Automatically starts keychain on netbeans start and loads specified keys so Netbeans can use them.
dev-java/oracle-jdk-bin:derby - Enable Installation of Bundled Derby (Java DB)
dev-java/oracle-jdk-bin:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/oracle-jdk-bin:pax_kernel - Use paxctl to mark the JVM binaries.
dev-java/oracle-jre-bin:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/oracle-jre-bin:pax_kernel - Use paxctl to mark the JVM binaries.
dev-java/proguard:ant - Ant task for using ProGuard in build.xml scripts
dev-java/proguard:j2me - Adds support for J2ME Wireless Toolkit
dev-java/rxtx:lfd - Installs and uses LockFileServer daemon (lfd)
dev-java/spymemcached:spring - Build support for the spring framework
dev-java/sun-jdk:derby - Enable Installation of Bundled Derby (Java DB)
dev-java/sun-jdk:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/sun-jdk:pax_kernel - Use paxctl to mark the JVM binaries.
dev-java/sun-jre-bin:jce - Enable Java Cryptographic Extension Unlimited Strength Policy files
dev-java/sun-jre-bin:pax_kernel - Use paxctl to mark the JVM binaries.
dev-java/swt:webkit - Embedded browser support via net-libs/webkit-gtk:2, replacing former xulrunner-based browser.
dev-lang/bas:lr0 - Use the LR0 parser instead of the recursive descending parser
dev-lang/erlang:compat-ethread - Enable compatibility with pre-pentium 4 CPUs in the ethread library.
dev-lang/erlang:halfword - Enable halfword emulator
dev-lang/erlang:hipe - HIgh Performance Erlang extension
dev-lang/erlang:kpoll - Enable kernel polling support
dev-lang/erlang:sctp - Support for Stream Control Transmission Protocol
dev-lang/fpc:ide - Build and install the Free Pascal Compiler IDE
dev-lang/gdl:grib - Add support for the meteorological GRIB format with sci-libs/grib_api
dev-lang/gdl:gshhs - Add support for projection adn continent maps with sci-geosciences/gshhs-data
dev-lang/gdl:hdf - Add support for the Hierarchical Data Format v.4
dev-lang/gdl:proj - Add support for sci-libs/proj (geographic projections)
dev-lang/gdl:udunits - Add support for manipulating units of physical quantities
dev-lang/ghc:binary - Install the binary version directly, rather than using it to build the source version.
dev-lang/ghc:ghcbootstrap - Bootstrap from an existing GHC installation.
dev-lang/ghc:ghcmakebinary - Build with less runtime depends (bundle libffi for building bootstrap binaries).
dev-lang/ghc:llvm - Enable llvm code geenrator for ghc (-fllvm).
dev-lang/gnat-gcc:lto - Add support for link-time optimizations (unsupported, use at your own risk).
dev-lang/icc:eclipse - Install the dev-util/eclipse-sdk plugins
dev-lang/icon:iplsrc - install the icon programming library source
dev-lang/idb:eclipse - Install the dev-util/eclipse-sdk plugins
dev-lang/io:clutter - Build add-on for media-libs/clutter
dev-lang/io:editline - Build add-on for dev-libs/libedit
dev-lang/io:google - Build the google search add-on
dev-lang/io:gui - Build the Flux GUI add-on
dev-lang/io:http - Build http client add-on
dev-lang/io:image - Build add-on for images support (jpeg, png, tiff)
dev-lang/io:libxml2 - Build add-on for dev-libs/libxml2
dev-lang/io:md5sum - Build md5sum add-on
dev-lang/io:sha1 - Build sha1 add-on
dev-lang/io:twitter - Build twitter add-on
dev-lang/lazarus:minimal - Don't build extra packages from the bigide component
dev-lang/logtalk:fop - Support for generating pdf documentation using fop
dev-lang/logtalk:gnupl - Support GNU Prolog back-end compiler
dev-lang/logtalk:qupl - Support Qu-Prolog back-end compiler
dev-lang/logtalk:swipl - Support SWI-Prolog back-end compiler
dev-lang/logtalk:xsbpl - Support XSB back-end compiler
dev-lang/logtalk:xslt - Support for generating html documentation using xslt
dev-lang/logtalk:yappl - Support YAP back-end compiler
dev-lang/lua:deprecated - make deprecated data structures/routines available
dev-lang/luajit:lua52compat - Enable some upwards-compatible features from Lua 5.2 that are unlikely to break existing code.
dev-lang/mercury:erlang - Support Mercury Erlang grade
dev-lang/mlton:binary - install a binary version (need to do this once to bootstrap, until smlnj is supported)
dev-lang/mono:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
dev-lang/mono:xen - Make mono generate code that is considerably faster on xen VMs but slightly slower on for normal systems.
dev-lang/nqp:moar - Build the MoarVM backend (experimental/broken)
dev-lang/nqp:parrot - Build the parrot backend (default)
dev-lang/path64:assembler - Build PathAS
dev-lang/path64:debugger - Build PathDB
dev-lang/path64:native - Use EKOPath/Path64 for bootstraping
dev-lang/path64:valgrind - Use dev-util/valgrind for memory debbuging
dev-lang/perl:ithreads - Enable Perl threads, has some compatibility problems
dev-lang/php:cli - Enable CLI SAPI
dev-lang/php:embed - Enable embed SAPI
dev-lang/php:enchant - Add supports Enchant spelling library.
dev-lang/php:fileinfo - Add fileinfo extension support
dev-lang/php:filter - Add filter extension support
dev-lang/php:fpm - Enable the FastCGI Process Manager SAPI
dev-lang/php:gd - Adds support for gd (bundled with PHP)
dev-lang/php:hash - Enable the hash extension
dev-lang/php:intl - Enables the intl extension for extended internalization support
dev-lang/php:json - Enable JSON support
dev-lang/php:ldap-sasl - Add SASL support for the PHP LDAP extension
dev-lang/php:libmysqlclient - Use libmyslclient driver for mysql, mysqli, PDO_Mysql (not recommended)
dev-lang/php:mysqlnd - Use native driver for mysql, mysqli, PDO_Mysql
dev-lang/php:opcache - Enables built-in opcode cache, replacing pecl-apc et.al
dev-lang/php:pdo - Enable the bundled PDO extensions
dev-lang/php:phar - Enables the phar extension to provide phar archive support
dev-lang/php:sqlite2 - Add sqlite2 support. Will be removed
dev-lang/php:xmlreader - Enable XMLReader support
dev-lang/php:xmlwriter - Enable XMLWriter support
dev-lang/php:xslt - Enable the XSL extension
dev-lang/php:zip - Enable ZIP file support
dev-lang/polyml:portable - Build the portable interpreter version of Poly/ML instead of native.
dev-lang/python:threads - Enable threading support. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING)
dev-lang/python:wide-unicode - Enable wide Unicode implementation which uses 4-byte Unicode characters. Switching of this USE flag changes ABI of Python and requires reinstallation of many Python modules. (DON'T DISABLE THIS UNLESS YOU KNOW WHAT YOU'RE DOING)
dev-lang/python:wininst - Install Windows executables required to create an executable installer for MS Windows.
dev-lang/qu-prolog:pedro - Pedro subscription/notification communications system
dev-lang/rakudo:parrot - Build the parrot backend (default)
dev-lang/rubinius:llvm - Build with llvm. Currently the package only builds against old versions of llvm.
dev-lang/ruby:libedit - Use the dev-libs/libedit library to provide the readline extension, used for instance by the irb tool. This flag will take precedence over the readline USE flag. If neither libedit nor readline USE flags are enabled, the readline extension will not be built (and irb will lose line editing functionality).
dev-lang/ruby:rdoc - Install dev-ruby/rdoc after installing Ruby.
dev-lang/ruby:readline - Use the sys-libs/readline library to provide the readline extension, used for instance by the irb tool. This flag is meaningful only if the libedit USE flag is disabled. If neither libedit nor readline USE flags are enabled, the readline extension will not be built (and irb will lose line editing functionality).
dev-lang/ruby:rubytests - Install ruby tests that can only be run after ruby is installed
dev-lang/ruby:yaml - Use the dev-libs/libyaml library to build the psych extension, available since Ruby 1.9.2_rc2, in alternative to the bundled syck-based parser.
dev-lang/scala:binary - Install from (Gentoo-compiled) binary instead of building from sources. Set this when you run out of memory during build.
dev-lang/spidermonkey:debug - Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems
dev-lang/spidermonkey:system-icu - Use the system-wide dev-libs/icu instead of bundled -- note, only takes effect when icu flag is enabled
dev-lang/spidermonkey:threadsafe - Build a threadsafe version of spidermonkey
dev-lang/swi-prolog:archive - Use libarchive for extension packs
dev-lang/swig:ccache - build ccache-swig(a fast compiler cache)
dev-lang/vala:vapigen - Enable vala's library binding generator
dev-lang/yap:R - Enable support for connecting R to Prolog
dev-libs/DirectFB:bmp - build BMP image provider
dev-libs/DirectFB:divine - enable DiVine
dev-libs/DirectFB:drmkms - build with DRM/KMS support
dev-libs/DirectFB:dynload - enable dynload support
dev-libs/DirectFB:egl - build with EGL support
dev-libs/DirectFB:fusiondale - enable FusionDale
dev-libs/DirectFB:fusionsound - enable FusionSound
dev-libs/DirectFB:gles2 - build gles2 gfxdriver
dev-libs/DirectFB:imlib2 - build Imlib2 image provider
dev-libs/DirectFB:input_hub - provides an asynchronous interface to the input devices available and those being added/removed
dev-libs/DirectFB:mpeg2 - build MPEG2 image provider
dev-libs/DirectFB:mpeg3 - build Libmpeg3 video provider
dev-libs/DirectFB:multicore - enable multicore support
dev-libs/DirectFB:pnm - build PNM (PBM/PGM/PPM) image provider
dev-libs/DirectFB:sawman - enable SaWMan (window manager and application manager)
dev-libs/DirectFB:swfdec - build Swfdec (Flash decoder) video provider
dev-libs/DirectFB:tremor - build Ogg/Vorbis music provider using Tremor
dev-libs/DirectFB:webp - build WebP image provider
dev-libs/STLport:boost - Enable the usage of dev-libs/boost
dev-libs/ace:ciao - Include Component Intergraced Ace ORB into the build of ace
dev-libs/ace:tao - Include the ACE ORB (CORBA stuff) (called tao) into the build of ace
dev-libs/antlr-c:debugger - Compiles debug info into the library
dev-libs/apr:older-kernels-compatibility - Enable binary compatibility with older kernels
dev-libs/apr:urandom - Use /dev/urandom instead of /dev/random
dev-libs/apr-util:nss - Install apr_crypto_nss module
dev-libs/apr-util:openssl - Install apr_crypto_openssl module
dev-libs/bitset:jemalloc - Use dev-libs/jemalloc for allocations
dev-libs/bitset:tcmalloc - Use tcmalloc from dev-util/google-perftools for allocations
dev-libs/blitz:boost - Enable usage of boost::serialization
dev-libs/boost:context - Build and install the Boost.Context library and all other Boostlibraries that depends on it
dev-libs/boost:debug - Build and install only the debug version of the Boost libraries. Only enable this flag if you're developing against boost.
dev-libs/boost:doc - Install the full API documentation documentation. This takes over 200MB of extra disk space.
dev-libs/boost:nls - Build libboost_locale. This library requires compatible C library interfaces, which might not be provided by uClibc or other embedded libraries.
dev-libs/boost:threads - Build multi-thread-compatible libraries instead of single-threaded only.
dev-libs/boost:tools - Build and install the boost tools (bcp, quickbook, inspect, wave)
dev-libs/c-blosc:lz4 - Enable lz4 compression
dev-libs/c-blosc:snappy - Enable snappy compression
dev-libs/check:subunit - Enable support for the subunit unit test protocol
dev-libs/cyberjack:fox - Enable installation of x11-libs/fox based fxcyberjack program
dev-libs/cyrus-sasl:authdaemond - Add Courier-IMAP authdaemond unix socket support (net-mail/courier-imap, mail-mta/courier)
dev-libs/cyrus-sasl:ldapdb - Enable ldapdb plugin
dev-libs/cyrus-sasl:ntlm_unsupported_patch - Add NTLM net-fs/samba NOT supported patch
dev-libs/cyrus-sasl:openldap - Add ldap support for saslauthd
dev-libs/cyrus-sasl:sample - Enable sample client and server
dev-libs/cyrus-sasl:srp - Enable SRP authentication
dev-libs/cyrus-sasl:urandom - Use /dev/urandom instead of /dev/random
dev-libs/dbus-c++:ecore - Use Ecore integration
dev-libs/dbus-c++:glib - Use glib integration
dev-libs/e_dbus:bluetooth - Enable interfacing with net-wireless/bluez DBus API.
dev-libs/e_dbus:ofono - Enable interfacing with net-misc/ofono DBus API.
dev-libs/e_dbus:test-binaries - Enable building of test binaries for enabled features
dev-libs/ecore:ares - Enables support for asynchronous DNS using the net-dns/c-ares library
dev-libs/ecore:evas - Provides easy to use canvas by gluing media-libs/evas and various input/output systems.
dev-libs/ecore:gles - Add gles support to the ecore-evas-wayland module
dev-libs/ecore:glib - Enable dev-libs/glib eventloop support
dev-libs/ecore:inotify - Enable support for inotify
dev-libs/ecore:tslib - Build with tslib support for touchscreen devices.
dev-libs/ecore:wayland - Add support for dev-libs/wayland
dev-libs/ecore:xprint - Enable X11 Xprint support
dev-libs/eeze:utilities - Install some test utilities for mount/umount support in eeze
dev-libs/efl:audio - Enable audio support.
dev-libs/efl:bmp - Enable WBMP image loader.
dev-libs/efl:drm - Enable DRM engine.
dev-libs/efl:eet - Enable Eet image loader.
dev-libs/efl:egl - Enable EGL rendering.
dev-libs/efl:fribidi - Enable bidirectional text support.
dev-libs/efl:gles - Enable the OpenGL ES GL implementation.
dev-libs/efl:glib - Enable dev-libs/glib support.
dev-libs/efl:harfbuzz - Enable complex text shaping and layout support.
dev-libs/efl:ibus - Enable Intelligent Input Bus.
dev-libs/efl:ico - Enable Ico image loader.
dev-libs/efl:jp2k - Enable JPEG 2000 image loader.
dev-libs/efl:oldlua - USE dev-lang/lua instead of dev-lang/luajit
dev-libs/efl:physics - Enable Bullet physics effects and support.
dev-libs/efl:pixman - Enable PixMan for software rendering.
dev-libs/efl:ppm - Enable PMAPS image loader.
dev-libs/efl:psd - Enable PSD image loader.
dev-libs/efl:scim - Enable Smart Common Input Method.
dev-libs/efl:tga - Enable Tga image loader.
dev-libs/efl:tslib - Enable x11-libs/tslib for touchscreen events.
dev-libs/efl:v4l2 - Enable Video4Linux2 support.
dev-libs/efl:webp - Enable WebP image loader.
dev-libs/efl:xim - Enable X Input Method.
dev-libs/eina:default-mempool - By default use system's allocator (pass-through) instead of custom choice for Eina's own data structures.
dev-libs/eina:mempool-buddy - Compile "buddy" memory pool allocation.
dev-libs/eina:mempool-chained-pool - Compile "chained-pool" memory pool allocation.
dev-libs/eina:mempool-fixed-bitmap - Compile "fixed-bitmap" memory pool allocation.
dev-libs/eina:mempool-one-big - Compile "one-big" memory pool allocation.
dev-libs/eina:mempool-pass-through - Compile "pass-through" (system's malloc) memory pool allocation.
dev-libs/eina:valgrind - Compile in valgrind hints for smoother integration.
dev-libs/elfutils:lzma - Support automatic decompression of LZMA-compressed files and kernel images
dev-libs/elfutils:threads - Build the libraries with thread safe support
dev-libs/elfutils:utils - Install command-line utilities (all the eu-* programs)
dev-libs/fampp2:stlport - Include support for dev-libs/STLport
dev-libs/fcgi:html - Install HTML documentation
dev-libs/ferrisloki:stlport - Include support for dev-libs/STLport
dev-libs/folks:socialweb - Load web service contacts using net-libs/libsocialweb
dev-libs/folks:telepathy - Load contacts from the Telepathy framework
dev-libs/folks:tracker - Load contacts from app-misc/tracker index
dev-libs/folks:utils - Build the folks-inspect utility
dev-libs/folks:zeitgeist - Add support for Zeitgeist event tracking system
dev-libs/gecode:gist - Enable Gist, the Gecode Interactive Search Tool
dev-libs/geoip:city - Install the city based IP address database
dev-libs/geoip:perl-geoipupdate - Install pure perl version of geoipupdate, with Proxy Server support via the "http_proxy" environment variable and easy to customize.
dev-libs/gf2x:bindist - Disable automatic fine-tuning to local processor features like pclmul or sse2.
dev-libs/glib:systemtap - Build support for profiling and tracing using dev-util/systemtap
dev-libs/glib:utils - Install gtester-report utility to generate test report files for your software.
dev-libs/gmp:pgo - after building gmp, run some tests against to produce faster libraries -- this option will double the compile time
dev-libs/gobject-introspection:doctool - Install g-ir-doc-tool for generating documentation from introspected data
dev-libs/intel-common:compiler - Install the libraries needed for the icc and ifort compilers
dev-libs/jemalloc:stats - Enable statistics calculation/reporting
dev-libs/keybinder:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/leveldb:snappy - support the snappy compression library
dev-libs/libRocket:samples - Build samples
dev-libs/libappindicator:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/libburn:cdio - Enable EXPERIMENTAL use of libcdio as system adapter
dev-libs/libburn:track-src-odirect - Read track input with O_DIRECT (see man 2 open), this may deliver a better write performance in some situations
dev-libs/libcdio:minimal - Only build the libcdio library and little more, just to be used to link against from multimedia players. With this USE flag enabled, none of the command-line utilities are built, nor is the CDDA library.
dev-libs/libcgroup:daemon - Install the configuration tools and init/config files.
dev-libs/libcgroup:tools - Install the cgroup rules processing daemon and init/config files.
dev-libs/libdbusmenu:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/libdivecomputer:tools - Install tools that can be used to test the library.
dev-libs/libffi:pax_kernel - Use PaX emulated trampolines, for we can't use PROT_EXEC
dev-libs/libgdata:vala - Enable bindings for dev-lang/vala
dev-libs/libgit2:ssh - Enable SSH transport support
dev-libs/libgit2:trace - Enable tracing support
dev-libs/libgpg-error:common-lisp - Install common-lisp files
dev-libs/libgusb:vala - Enable bindings for dev-lang/vala
dev-libs/libgweather:glade - Installs catalog files for dev-util/glade
dev-libs/libindicate:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/libisoburn:cdio - Enable EXPERIMENTAL use of libcdio as system adapter
dev-libs/libisoburn:external-filters - Allow the use of external processes as file content filters (Note: this is a potential security risk)
dev-libs/libisoburn:external-filters-setuid - Also allow the use of external setuid processes as file content filters (Note: this is a potential security risk)
dev-libs/libisoburn:frontend-optional - Use dev-tcltk/bwidget which is not strictly required for the frontend
dev-libs/libisoburn:launch-frontend - Enable the tcl gui for xorriso
dev-libs/libisoburn:launch-frontend-setuid - Enable the tcl gui for xorriso under setuid
dev-libs/libisofs:verbose-debug - Enable verbose debug messages
dev-libs/libjit:interpreter - Enable the libjit interpreter
dev-libs/libjit:long-double - Enable the use of long double for jit_nfloat
dev-libs/liblogging:rfc3195 - Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it!
dev-libs/liblogging:stdlog - Enables liblogging's core component (think of it as a the next version of the syslog(3) API).
dev-libs/libmail:apop - Enables the APOP authentication method
dev-libs/libmemcached:hsieh - Use Hsieh hash algorithm.
dev-libs/libmemcached:libevent - Use the libevent event loop interface.
dev-libs/libmemcached:sasl - Use sasl auth for communications.
dev-libs/libnfc:pcsc-lite - Enable NFC drivers that require pcsc-lite
dev-libs/libnl:doc - Install development documentation
dev-libs/libnl:python - Install experimental dev-lang/python bindings
dev-libs/libnl:utils - Install command line interface utils
dev-libs/libowfat:diet - Compile against dev-libs/dietlibc
dev-libs/libp11:doc - Generate and install API documentation for the package.
dev-libs/libpcre:bzip2 - Add support for pcregrep command to search within bzip2-compressed files, through sys-libs/zlib.
dev-libs/libpcre:pcre16 - Build 16 bit PCRE library.
dev-libs/libpcre:pcre32 - Build 32 bit PCRE library.
dev-libs/libpcre:readline - Add support for command line editing to pcretest, through sys-libs/readline.
dev-libs/libpcre:recursion-limit - Limit match recursion to 8192; if disabled, the default limit is used, which is the same as the match limit.
dev-libs/libpcre:zlib - Add support for pcregrep command to search within gzip-compressed files, through app-arch/gzip.
dev-libs/libpeas:gjs - Build support for loading JavaScript plugins using dev-libs/gjs
dev-libs/libpeas:glade - Install the glade catalog
dev-libs/libpeas:python - Build support for loading dev-lang/python plugins
dev-libs/libpeas:seed - Build support for loading JavaScript plugins using dev-libs/seed
dev-libs/librra:recurrence - Enable recurrence support (EXPERIMENTAL)
dev-libs/libsodium:asm - Enables assembly implementations
dev-libs/libsodium:urandom - Use /dev/urandom instead of /dev/random
dev-libs/libsqlora8:orathreads - Use Oracle threads
dev-libs/libunique:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/libverto:glib - Support event loops using dev-libs/glib
dev-libs/libverto:libev - Support event loops using dev-libs/libev
dev-libs/libverto:libevent - Support event loops using dev-libs/libevent
dev-libs/libverto:tevent - Support event loops using sys-libs/tevent
dev-libs/libzypp:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
dev-libs/link-grammar:aspell - Adds support for app-text/aspell spell checker
dev-libs/link-grammar:hunspell - Adds support for app-text/hunspell spell checker
dev-libs/log4cplus:iconv - Use inconv for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cplus:working-c-locale - Use the C99 locale facilities for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cplus:working-locale - Use C++'s std::locale for wchar_t <-> char conversions. See also log4cplus's unicode.txt documentation
dev-libs/log4cxx:smtp - Offer SMTP support via net-libs/libesmtp
dev-libs/m17n-lib:X - Builds the Graphical User Interface API and utilities for the package.
dev-libs/m17n-lib:anthy - Enable support for app-i18n/anthy input method.
dev-libs/m17n-lib:athena - Enable the MIT Athena widget set (x11-libs/libXaw)
dev-libs/m17n-lib:gd - Build API and utilities based on media-libs/gd. This flag is only meaningful if the X USE flag is also enabled.
dev-libs/m17n-lib:libotf - Use dev-libs/libotf to handle OpenType fonts
dev-libs/m17n-lib:libxml2 - Use dev-libs/libxml2 to parse XML
dev-libs/nss:cacert - Include root certs from CAcert (http://http://www.cacert.org/) and Software in the Public Interest (http://www.spi-inc.org/)
dev-libs/nss:nss-pem - Add support for libnsspem
dev-libs/nss:utils - Install utilities included with the library
dev-libs/oniguruma:combination-explosion-check - enable combination explosion check
dev-libs/oniguruma:crnl-as-line-terminator - enable CR+NL as line terminator
dev-libs/opencryptoki:tpm - Enable support for Trusted Platform Module (TPM) using app-crypt/trousers
dev-libs/openct:debug - Add debug output to the driver library for pcsc-lite.
dev-libs/openct:pcsc-lite - Build a driver library for sys-apps/pcsc-lite, providing PC/SC API access to devices supported by OpenCT.
dev-libs/openct:udev - Install rules for sys-fs/udev to auto-start openct.
dev-libs/openobex:irda - Enable IrDA support
dev-libs/opensc:ctapi - Use CT-API for accessing Smartcard hardware.
dev-libs/opensc:libtool - Use sys-devel/libtool for dynamically loading libraries rather than the host libdl/dlopen helpers.
dev-libs/opensc:openct - Use dev-libs/openct (and CT-API) for accessing Smartcard hardware.
dev-libs/opensc:pcsc-lite - Use sys-apps/pcsc-lite (and PC/SC API) for accessing Smartcard hardware.
dev-libs/opensc:secure-messaging - Enable secure messaging.
dev-libs/openssl:bindist - Disable EC/RC5 algorithms (as they seem to be patented) -- note: changes the ABI
dev-libs/openssl:rfc3779 - Enable support for RFC 3779 (X.509 Extensions for IP Addresses and AS Identifiers)
dev-libs/openssl:tls-heartbeat - Enable the Heartbeat Extension in TLS and DTLS
dev-libs/pkcs11-helper:nss - Enable NSS crypto engine
dev-libs/ppl:lpsol - Build the ppl_lpsol linear programming problem solver
dev-libs/ppl:watchdog - Build the PPL Watchdog library - a C++ library for multiple, concurrent watchdog timers
dev-libs/seed:profile - Build support for profiling dev-libs/seed for development purposes
dev-libs/soprano:raptor - Enables support for media-libs/raptor RDF parser/serializer.
dev-libs/soprano:redland - Enables support for the dev-libs/redland storage backend (really slow one).
dev-libs/soprano:virtuoso - Enables support for dev-db/virtuoso storage backend.
dev-libs/starpu:cuda - Enable NVIDIA CUDA toolkit support
dev-libs/starpu:gcc-plugin - Enable GCC extension plugin (experimental)
dev-libs/starpu:opencl - Enable OpenCL support
dev-libs/tinyxml:stl - Compile with TIXML_USE_STL support
dev-libs/tntnet:sdk - Enable tntnet SDK
dev-libs/tntnet:server - Enable tntnet server daemon
dev-libs/totem-pl-parser:archive - Enables support for accessing media files in archives transparently via app-arch/libarchive
dev-libs/totem-pl-parser:introspection - Use dev-libs/gobject-introspection for introspection
dev-libs/totem-pl-parser:quvi - Use media-libs/quvi for parsing video links
dev-libs/ucommon:socks - Build with socks proxy support
dev-libs/udis86:pic - Force shared libraries to be built as PIC
dev-libs/weston:clients - Enable support for clients
dev-libs/weston:colord - Allow setting color managment
dev-libs/weston:drm - Enable drm compositor support
dev-libs/weston:editor - Install wayland-editor example application
dev-libs/weston:egl - Enable egl acceleration
dev-libs/weston:fbdev - Enable fbdev compositor support
dev-libs/weston:gles2 - Use GLESv2 cairo instead of full GL
dev-libs/weston:headless - Headless backend and a noop renderer, mainly for testing purposes
dev-libs/weston:launch - Install weston-launch utility
dev-libs/weston:rdp - Enable Remote Desktop Protocol compositor support
dev-libs/weston:resize-optimization - Increase performance, allocate more RAM. Recommended to disable on Raspberry Pi
dev-libs/weston:rpi - Raspberry Pi GPU support
dev-libs/weston:simple-clients - Enable simple-clients
dev-libs/weston:tablet - Enable interface for tablets
dev-libs/weston:unwind - Enable libunwind usage for backtraces
dev-libs/weston:view - Install wayland-view example application
dev-libs/weston:wayland-compositor - Enable Wayland compositor support
dev-libs/weston:x11 - Enable X11 compositor support
dev-libs/weston:xwayland - Enable ability support native X11 applications
dev-libs/xapian:brass - Enabled brass backend db support
dev-libs/xapian:chert - Enabled chert backend db support
dev-libs/xapian:inmemory - Enabled inmemory backend db support
dev-libs/xerces-c:iconv - Use iconv (virtual/libiconv) as message loader and transcoder (in general it would be possible to use iconv only as message loader and something else like icu or the native method as transcoder and vice-versa, but this is a less common case and hard to handle)
dev-libs/xerces-c:threads - Enable threading support through pthread (or other libraries on AIX, IRIX, HPUX, Solars). Highly recommended
dev-libs/xml-security-c:nss - Use dev-libs/nss for certain crypto operations (configureable at runtime)
dev-libs/xml-security-c:xalan - Enable support for XSLT and XPath parsing by dev-libs/xalan-c
dev-libs/xmlrpc-c:abyss - Build the Abyss mini web-server.
dev-libs/xmlrpc-c:libxml2 - Use dev-libs/libxml2 to parse XML instead of the internal expat library.
dev-libs/xmlrpc-c:threads - Controls whether to build the Abyss web-server with pthreads or fork 'threading'.
dev-libs/xmlrpc-c:tools - Build the xmlrpc* tools.
dev-libs/xmlsec:gcrypt - Install xmlsec-gcrypt library
dev-libs/xmlsec:gnutls - Install xmlsec-gnutls library
dev-libs/xmlsec:nss - Install xmlsec-nss library
dev-libs/xmlsec:openssl - Install xmlsec-openssl library
dev-libs/xqilla:faxpp - Use dev-libs/faxpp instead of Xerces-C for certain tasks
dev-libs/xqilla:htmltidy - Use app-text/htmltidy when parsing HTML
dev-libs/yaz:ziffy - Install ziffy, a promiscuous Z39.50 APDU sniffer
dev-lisp/abcl:clisp - Build Armed Bear Common Lisp using GNU CLISP
dev-lisp/abcl:cmucl - Build Armed Bear Common Lisp using CMU Common Lisp
dev-lisp/abcl:jad - Enable support for disassembling compiled code using JAD
dev-lisp/clisp:hyperspec - Use local hyperspec instead of online version
dev-lisp/clisp:new-clx - Build CLISP with support for the NEW-CLX module which is a C binding to the Xorg libraries
dev-lisp/clisp:pari - Build CLISP with support for the PARI Computer Algebra System
dev-lisp/clisp:svm - Build CLISP with support for the Support Vector Machine module
dev-lisp/cmucl:nosource - Don't include source code for CMUCL in installation
dev-lisp/cmucl:source - Include source code for CMUCL in installation
dev-lisp/ecls:gengc - Use generational garbage collection (experimental)
dev-lisp/ecls:precisegc - Use type information during garbage collection (experimental)
dev-lisp/gcl:ansi - Build a GCL with ANSI support (else build a traditional CLtL1 image)
dev-lisp/gcl:athena - Build xgcl - an interface to x11-libs/libXaw
dev-lisp/sbcl:asdf - Include support for dev-lisp/asdf in SBCL
dev-lisp/sbcl:ldb - Include support for the SBCL low level debugger
dev-lisp/sbcl:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
dev-lua/luarocks:curl - Uses net-misc/curl for fetching lua packages instead of net-misc/wget.
dev-lua/luarocks:openssl - Uses dev-libs/openssl for verifying lua packages instead of md5sum.
dev-lua/luvit:bundled-libs - Use bundled versions of some libraries.
dev-lua/luvit:system-libs - Use system version of dev-libs/yajl.
dev-ml/cairo-ocaml:pango - Enable support for x11-libs/pango
dev-ml/deriving-ocsigen:type-conv - Enable type-conv for the syntax extention.
dev-ml/js_of_ocaml:deriving-ocsigen - Enable deriving-ocsigen for improving the type safety.
dev-ml/lablgtk:glade - Enable libglade bindings compilation.
dev-ml/lablgtk:gnomecanvas - Enable libgnomecanvas bindings compilation.
dev-ml/lablgtk:sourceview - Enable GtkSourceView support
dev-ml/lwt:react - Enables support for dev-ml/react: Functional reactive programming (signals, events, etc.).
dev-ml/ocamlnet:cryptokit - Enables encryption support via dev-ml/cryptokit
dev-ml/ocamlnet:httpd - Enables net-httpd web server component
dev-ml/ocamlnet:zip - Enables netzip support to read/write gzip data using object channels
dev-ml/pgocaml:batteries - Enable Batteries support instead of extlib
dev-ml/tyxml:ocamlduce - Enables ocamlduce XML typechecking.
dev-perl/App-Nopaste:clipboard - copying of URLs with -x/--copy
dev-perl/App-Nopaste:github - Github authentication
dev-perl/App-Nopaste:pastebin - pastebin.com support
dev-perl/DBD-mysql:embedded - Support embedded server (libmysqld)
dev-perl/DBIx-Class:admin - Modules required for the DBIx::Class administrative library
dev-perl/DBIx-Class:admin_script - Modules required for the CLI DBIx::Class interface dbicadmin
dev-perl/DBIx-Class:deploy - Modules required for "deploy" in DBIx::Class::Storage::DBI and "deploymen_statements" in DBIx::Class::Storage::DBI
dev-perl/DBIx-Class:replicated - Modules required for DBIx::Class::Storage::DBI::Replicated
dev-perl/Eidetic:auth - Enables dev-perl/Apache-AuthTicket based cookie authentication
dev-perl/File-HomeDir:xdg - Ensure XDG Semantics for returned paths via x11-misc/xdg-user-dirs
dev-perl/GD:animgif - Enable animated gif support
dev-perl/Graphics-ColorNames:recommended - Install recommended support modules
dev-perl/HTML-Mason:modperl - Enable www-apache/mod_perl support
dev-perl/Lab-Measurement:xpression - Install the Xpression measurement framework
dev-perl/Net-OpenSSH:sftp - Enable SFTP protocol support.
dev-perl/Net-SSH2:gcrypt - Use libgcrypt instead of openssl
dev-perl/PDL:badval - Enable bad values support
dev-perl/PDL:hdf - Enable HDF (version 4) format support
dev-perl/PDL:netpbm - Enable NETPBM and MPEG support
dev-perl/PDL:pdl2 - Build pdf2 shell (requires Devel-REPL)
dev-perl/PDL:pgplot - Enable PGPLOT plotting capabilities
dev-perl/PDL:plplot - Enable plplot plotting capabilities
dev-perl/Panotools-Script:gui - Installs GUIs for some tools
dev-perl/Sysadm-Install:hammer - Enable hammer() funtion to run a command in the shell and simulate a user hammering the ENTER key to accept defaults on prompts
dev-php/PEAR-HTTP_Download:minimal - Do not include support for PEAR-MIME_Type
dev-php/PEAR-HTTP_Download:postgres - Send postgres LOBs without buffering
dev-php/PEAR-HTTP_Request2:curl - Force dev-lang/php to be compiled with curl extension
dev-php/PEAR-HTTP_Request2:fileinfo - Force dev-lang/php to be compiled with fileinfo extension
dev-php/PEAR-HTTP_Request2:ssl - Force dev-lang/php to be compiled with ssl extension
dev-php/PEAR-HTTP_Request2:zlib - Force dev-lang/php to be compiled with zlib extension
dev-php/PEAR-PHP_Shell:auto-completion - Enable tab-completion
dev-php/ZendFramework:cli - Enables the CLI
dev-php/ZendFramework:doc - Installs the documentation
dev-php/ZendFramework:examples - Installs the examples
dev-php/ZendFramework:minimal - Installs the minimal version without Dojo toolkit, tests and demos
dev-php/eaccelerator:disassembler - Enable the eA disassembler
dev-php/eaccelerator:doccommentinclusion - If you want eAccelerator to retain doc-comments in internal php structures.
dev-php/eaccelerator:inode - Use inode-based caching
dev-php/pecl-apc:lock_pthreadmutex - Enable pthread mutex locking
dev-php/pecl-apc:lock_pthreadrw - Enable pthread read/write locking
dev-php/pecl-apc:lock_semaphore - Enable semaphore locks instead of fcntl
dev-php/pecl-apc:lock_spinlock - Enable spin locks (EXPERIMENTAL)
dev-php/pecl-apcu:lock_pthreadmutex - Enable pthread mutex locking
dev-php/pecl-apcu:lock_pthreadrw - Enable pthread read/write locking
dev-php/pecl-apcu:lock_semaphore - Enable semaphore locks instead of fcntl
dev-php/pecl-apcu:lock_spinlock - Enable spin locks (EXPERIMENTAL)
dev-php/pecl-event:extra - Add support of the Libevent extra API
dev-php/pecl-memcached:igbinary - Enable support for the igbinary serializer
dev-php/pecl-memcached:json - Enable support for json serialization
dev-php/pecl-redis:igbinary - Enables igbinary serialisation support
dev-php/smarty-docs:html - Install the documentation in HTML format
dev-php/smarty-docs:pdf - Install the documentation in PDF format
dev-python/PyFoam:extras - Enable optional dependencies
dev-python/PyQt4:X - Build QtGui and QtTest modules
dev-python/PyQt4:declarative - Build QtDeclarative module
dev-python/PyQt4:designer - Build QtDesigner module
dev-python/PyQt4:help - Build QtHelp module
dev-python/PyQt4:kde - Select media-libs/phonon as Phonon variant (needed for KDE)
dev-python/PyQt4:multimedia - Build QtMultimedia module
dev-python/PyQt4:opengl - Build QtOpenGL module
dev-python/PyQt4:phonon - Build phonon module
dev-python/PyQt4:script - Build QtScript module
dev-python/PyQt4:scripttools - Build QtScriptTools module
dev-python/PyQt4:sql - Build QtSql module
dev-python/PyQt4:svg - Build QtSvg module
dev-python/PyQt4:webkit - Build QtWebKit module
dev-python/PyQt4:xmlpatterns - Build QtXmlPatterns module
dev-python/PyQtMobility:contacts - Build bindings for the QtContacts module
dev-python/PyQtMobility:feedback - Build bindings for the QtFeedback module
dev-python/PyQtMobility:gallery - Build bindings for the QtGallery module
dev-python/PyQtMobility:location - Build bindings for the QtLocation module
dev-python/PyQtMobility:messaging - Build bindings for the QtMessaging module
dev-python/PyQtMobility:multimedia - Build bindings for the QtMultimediaKit module
dev-python/PyQtMobility:organizer - Build bindings for the QtOrganizer module
dev-python/PyQtMobility:publishsubscribe - Build bindings for the QtPublishSubscribe module
dev-python/PyQtMobility:sensors - Build bindings for the QtSensors module
dev-python/PyQtMobility:serviceframework - Build bindings for the QtServiceFramework module
dev-python/PyQtMobility:systeminfo - Build bindings for the QtSystemInfo module
dev-python/PyQtMobility:versit - Build bindings for the QtVersit module
dev-python/amqplib:extras - Install extra tools to generate initial Python mod from an AMQP XML file
dev-python/anyvc:bazaar - Add support for Bazaar
dev-python/anyvc:mercurial - Add support for Mercurial
dev-python/bpython:urwid - Backend based on dev-python/urwid
dev-python/celery:sql - Adds SQL support
dev-python/cgkit:3ds - Enable support for importing 3D Studio models
dev-python/cvxopt:dsdp - Use interior point library sci-libs/dsdp
dev-python/cvxopt:glpk - Use GNU Linear Programming Kit sci-mathematics/glpk
dev-python/cython:numpy - Enable support for dev-python/numpy
dev-python/dap:server - Enable OpenDAP server support
dev-python/django-extensions:graphviz - Create a diagram of your database entity relationships using dev-python/pygraphviz.
dev-python/django-extensions:s3 - Upload your media files to S3.
dev-python/django-extensions:vcard - Export your users email addresses to the vcard format.
dev-python/django-tastypie:bip - An optional serialiser dev-python/biplist
dev-python/django-tastypie:digest - Library to aid in implementing HTTP Digest Authentication
dev-python/django-tastypie:lxml - An optional serialiser dev-python/lxml
dev-python/django-tastypie:oauth - Adds OAuth authentication support
dev-python/django-tastypie:yaml - An optional serialiser dev-python/yaml
dev-python/docutils:glep - Install support for GLEPs
dev-python/falcon:cython - Build cython-based python modules
dev-python/gmpy:mpir - Use sci-libs/mpir as gmp implementation
dev-python/icalendar:doc - Generate examples and other extra documentation
dev-python/ipython:matplotlib - Add support for dev-python/matplotlib
dev-python/ipython:mongodb - Enable support for MongoDB via dev-python/pymongo
dev-python/ipython:nbconvert - Enable support for converting notebooks to various formats using app-text/pandoc
dev-python/ipython:notebook - Install requirements for the web notebook based on www-servers/tornado
dev-python/ipython:octave - Enable octave bridge via dev-python/oct2py
dev-python/jinja:i18n - Enables support for i18n with dev-python/Babel
dev-python/kaa-base:tls - SSL/TLS support via dev-python/tlslite
dev-python/kazoo:gevent - Enable support for the gevent based handler
dev-python/kombu:amqplib - Enable amqplib support
dev-python/ldaptor:web - enable the web front end for ldaptor (uses dev-python/nevow)
dev-python/lxml:beautifulsoup3 - Enable support for Beautiful Soup 3
dev-python/markdown:pygments - Enable fancy pygments support
dev-python/matplotlib:excel - Pull dev-python/xlwt for the exceltools toolkit
dev-python/matplotlib:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
dev-python/matplotlib:pyside - Qt support via dev-python/pyside
dev-python/mpmath:matplotlib - Add support for dev-python/matplotlib
dev-python/mwlib:server - Install the daemons required when using mwlib for generating PDFs on a MediaWiki instance.
dev-python/mwlib-rl:pdftk - Enable support for app-text/pdftk, required to generate TOCs
dev-python/netaddr:cli - Enable netaddr shell with dev-python/ipython
dev-python/nose:coverage - Utilize dev-python/coverage
dev-python/numexpr:mkl - Enable support for Intel Vector Math Library, part of sci-libs/mkl.
dev-python/pandas:R - Enable support for R via dev-python/rpy
dev-python/pandas:excel - Pull a few Python packages for Microsoft Excel i/o
dev-python/pandas:html - Enable HTML i/o via dev-python/beautifulsoup
dev-python/paste:flup - enable support for flup (and therefore for various wgsi servers and middleware)
dev-python/paste:openid - enable OpenID support
dev-python/pillow:webp - Enable support for webp image format.
dev-python/psycopg:mxdatetime - Enable support for MX DateTime and use it instead of Python's built-in datetime module
dev-python/py-amqp:extras - Install extra tools to generate initial Python mod from an AMQP XML file
dev-python/pylons:genshi - Add optional genshi support
dev-python/pylons:jinja - Add optional jinja support
dev-python/pymongo:mod_wsgi - Disable the C extension to work with mod_wsgi.
dev-python/pypax:ptpax - Enable PT_PAX_FLAGS support.
dev-python/pypax:xtpax - Enable XATTR_PAX_FLAGS support.
dev-python/pyplusplus:indexing - Install indexing_suite_v2 to enhance boost python
dev-python/pyplusplus:numpy - Generate code for dev-libs/boost-numpy to accelerate arrays
dev-python/pypy:sandbox - Enable sandboxing functionality
dev-python/pypy:shadowstack - Use a shadow stack for finding GC roots
dev-python/pypy-bin:shadowstack - Use a shadow stack for finding GC roots
dev-python/pyquery:beautifulsoup3 - Support BeautifulSoup 3
dev-python/pyrax:keyring - adds support for the keyring auth backend
dev-python/pyside:X - Build QtGui and QtTest modules
dev-python/pyside:declarative - Build QtDeclarative module
dev-python/pyside:designer - Build QtDesigner and QtUiTools modules
dev-python/pyside:help - Build QtHelp module
dev-python/pyside:kde - Select media-libs/phonon as Phonon variant (needed for KDE)
dev-python/pyside:multimedia - Build QtMultimedia module
dev-python/pyside:opengl - Build QtOpenGL module
dev-python/pyside:phonon - Build phonon module
dev-python/pyside:script - Build QtScript module
dev-python/pyside:scripttools - Build QtScriptTools module
dev-python/pyside:sql - Build QtSql module
dev-python/pyside:svg - Build QtSvg module
dev-python/pyside:webkit - Build QtWebKit module
dev-python/pyside:xmlpatterns - Build QtXmlPatterns module
dev-python/pytables:contrib - Install user-contributed files
dev-python/pyudev:pygobject - Install PyGobject binding
dev-python/pyudev:pyqt4 - Install PyQt4 binding
dev-python/pyudev:pyside - Install PySide binding
dev-python/pyyaml:libyaml - enable support for C implementaion using libyaml
dev-python/pyzmq:green - Enable gevent compatibility with zeromq
dev-python/pyzor:pyzord - enable support for pyzord
dev-python/rarfile:compressed - Enables the module to support compressed v3 archives by calling the app-arch/unrar.
dev-python/rdflib:redland - enable support for Redland triplestore
dev-python/restkit:cli - Install the restcli command line interface/tool, based on dev-python/ipython
dev-python/scrapy:boto - Add support for Amazon S3 via dev-python/boto
dev-python/scrapy:ibl - Use Instace Based Learning alrogirithm for automatic extraction
dev-python/simplecv:shell - Enable the iPython SimpleCV shell
dev-python/spyder:ipython - Add support for dev-python/ipython
dev-python/spyder:matplotlib - Add support for dev-python/matplotlib
dev-python/spyder:numpy - Add support for dev-python/numpy
dev-python/spyder:pep8 - Add support for dev-python/pep8
dev-python/spyder:pyflakes - Add support for dev-python/pyflakes
dev-python/spyder:pylint - Add support for dev-python/pylint
dev-python/spyder:rope - Add support for dev-python/rope
dev-python/spyder:scipy - Add support for sci-libs/scipy
dev-python/spyder:sphinx - Add support for dev-python/sphinx
dev-python/starcluster:epydoc - Enable build of apidocs in html using epydoc
dev-python/sympy:imaging - Add support for dev-python/imaging
dev-python/sympy:ipython - Add support for dev-python/ipython
dev-python/sympy:mathml - Add support for mathml
dev-python/sympy:pyglet - Use dev-python/pyglet for plots and print preview
dev-python/sympy:system-mpmath - Use mpmath from portage instead of the bundled one
dev-python/sympy:texmacs - Add app-office/texmacs interface
dev-python/sympy:theano - Add support for dev-python/theano
dev-python/tdaemon:coverage - Enable code coverage support
dev-python/translate-toolkit:html - Support conversion between po and html files
dev-python/translate-toolkit:ical - Support conversion between po and ical files
dev-python/translate-toolkit:ini - Support conversion between po and ini files
dev-python/translate-toolkit:subtitles - Support conversion between po and sub files
dev-python/twisted-core:serial - include serial port support
dev-python/vatnumber:vies - Enable VIES
dev-python/ws4py:client - Install client modules
dev-python/ws4py:server - Install server modules
dev-python/wxpython:doc - Install HTML wxWidgets docs and wxpython API reference.
dev-python/wxpython:examples - Install interactive demo module browser and sample applets.
dev-python/zsi:twisted - add support for dev-python/twisted
dev-qt/assistant:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/designer:declarative - Build the qdeclarativeview plugin
dev-qt/designer:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/designer:phonon - Build the phononwidgets plugin
dev-qt/designer:qt3support - Build the qt3supportwidgets plugin
dev-qt/designer:webkit - Build the qwebview plugin
dev-qt/linguist:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/pixeltool:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qdbusviewer:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qt-creator:android - Build plugin for Android devices
dev-qt/qt-creator:autotools - Enable autotools project manager plugin
dev-qt/qt-creator:baremetal - Build plugin for bare metal devices
dev-qt/qt-creator:bazaar - Add support for dev-vcs/bzr version control system
dev-qt/qt-creator:clearcase - Add support for IBM ClearCase version control system (requires manual installation of ClearCase client)
dev-qt/qt-creator:cmake - Enable cmake project manager plugin
dev-qt/qt-creator:fakevim - Enable support for vim-like key bindings
dev-qt/qt-creator:ios - Build plugin for Apple iOS devices
dev-qt/qt-creator:madde - Enable integration with MADDE (Maemo Application Development and Debugging Environment)
dev-qt/qt-creator:mercurial - Add support for dev-vcs/mercurial version control system
dev-qt/qt-creator:perforce - Add support for Perforce version control system (requires manual installation of Perforce client)
dev-qt/qt-creator:python - Enable Python source code editor
dev-qt/qt-creator:qnx - Build plugin for QNX/Blackberry devices
dev-qt/qt-creator:valgrind - Add support for memory debugging using dev-util/valgrind
dev-qt/qt-meta:kde - Select media-libs/phonon as Phonon variant (needed for KDE)
dev-qt/qt-meta:opengl - Enable the QtOpenGL module
dev-qt/qt-meta:openvg - Enable the QtOpenVG module
dev-qt/qt-meta:qt3support - Enable the Qt3Support library for Qt4
dev-qt/qt-mobility:bearer - Build the QtBearer module
dev-qt/qt-mobility:bluetooth - Enable Bluetooth support in QtConnectivity and QtSystemInfo modules
dev-qt/qt-mobility:connectivity - Build the QtConnectivity module
dev-qt/qt-mobility:contacts - Build the QtContacts module
dev-qt/qt-mobility:feedback - Build the QtFeedback module
dev-qt/qt-mobility:gallery - Build the QtGallery module
dev-qt/qt-mobility:location - Build the QtLocation module
dev-qt/qt-mobility:messaging - Build the QtMessaging module
dev-qt/qt-mobility:multimedia - Build the QtMultimediaKit module
dev-qt/qt-mobility:networkmanager - Enable NetworkManager support in QtBearer and QtSystemInfo modules
dev-qt/qt-mobility:organizer - Build the QtOrganizer module
dev-qt/qt-mobility:publishsubscribe - Build the QtPublishSubscribe module
dev-qt/qt-mobility:pulseaudio - Enable PulseAudio support in QtMultimediaKit module
dev-qt/qt-mobility:qml - Build QML bindings
dev-qt/qt-mobility:sensors - Build the QtSensors module
dev-qt/qt-mobility:serviceframework - Build the QtServiceFramework module
dev-qt/qt-mobility:systeminfo - Build the QtSystemInfo module
dev-qt/qt-mobility:tools - Build various useful tools (e.g.: qcrmlgen, servicexmlgen, vsexplorer, ...)
dev-qt/qt-mobility:versit - Build the QtVersit module
dev-qt/qt3support:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtbearer:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtcore:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtcore:glib - Enable dev-libs/glib eventloop support
dev-qt/qtcore:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtdbus:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtdeclarative:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtdeclarative:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtdeclarative:webkit - Build the WebView QML component
dev-qt/qtdemo:dbus - Build QtDBus examples and demos
dev-qt/qtdemo:declarative - Build QtDeclarative examples and demos
dev-qt/qtdemo:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtdemo:multimedia - Build QtMultimedia examples and demos
dev-qt/qtdemo:opengl - Build QtOpenGL examples and demos
dev-qt/qtdemo:openvg - Build QtOpenVG examples and demos
dev-qt/qtdemo:phonon - Build Phonon examples and demos
dev-qt/qtdemo:qt3support - Build Qt3Support examples and demos
dev-qt/qtdemo:webkit - Build QtWebKit examples and demos
dev-qt/qtdemo:xmlpatterns - Build QtXmlPatterns examples and demos
dev-qt/qtgui:egl - Use EGL instead of default GLX to manage OpenGL contexts on the desktop
dev-qt/qtgui:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtgui:glib - Enable dev-libs/glib eventloop support
dev-qt/qtgui:gtkstyle - Build a Qt style called GTK+ that mimics the active GTK+ theme
dev-qt/qtgui:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtgui:trace - Build the 'trace' graphicssystem engine which allows to record all drawing operations into a trace buffer. Later it can be replayed with the qttracereplay utility
dev-qt/qthelp:compat - Build the extra compatibility layer required by a few packages, see http://blog.qt.digia.com/blog/2010/06/22/qt-assistant-compat-version-available-as-extra-source-package/
dev-qt/qthelp:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtmultimedia:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtopengl:egl - Use EGL instead of default GLX to manage OpenGL contexts on the desktop
dev-qt/qtopengl:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtopengl:qt3support - Enable the Qt3Support libraries for Qt4
dev-qt/qtopenvg:exceptions - Build with support for exceptions
dev-qt/qtopenvg:qt3support - Enable the Qt3Support libraries for Qt4
dev-qt/qtphonon:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtphonon:qt3support - Enable the Qt3Support libraries for Qt4. Note that this does not mean you can compile pure Qt3 programs with Qt4.
dev-qt/qtscript:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtsql:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtsql:qt3support - Enable the Qt3Support libraries for Qt4
dev-qt/qtsvg:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qttest:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtwebkit:exceptions - Add support for exceptions - like catching them inside the event loop (recommended by upstream)
dev-qt/qtwebkit:gstreamer - Enable HTML5 audio/video support via media-libs/gstreamer
dev-ruby/barby:cairo - Add support for writing images (PNG, PS, EPS and, if supported, PDF and SVG) using dev-ruby/rcairo. Not available on JRuby.
dev-ruby/barby:png - Add support for writing PNG images using dev-ruby/chunky_png.
dev-ruby/barby:prawn - Add support for writing PDF documents using dev-ruby/prawn.
dev-ruby/barby:qrcode - Add support for QRCode 2D codes using dev-ruby/rqrcode.
dev-ruby/barby:rmagick - Add support for writing images (among others PNG, GIF and JPEG) using dev-ruby/rmagick. Not available on JRuby.
dev-ruby/facter:dmi - Use sys-apps/dmidecode to determine hardware system properties
dev-ruby/facter:pciutils - Use sys-apps/pciutils to determine hardware system properties
dev-ruby/maruku:highlight - Enable source code highlighting via dev-ruby/syntax
dev-ruby/rails:asset-pipeline - Also install the default components for the asset pipeline. These are not required but they are activated automatically in new Rails projects by default.
dev-ruby/ruby-sdl:image - Enable media-libs/sdl-image support
dev-ruby/ruby-sdl:mixer - Enable media-libs/sdl-mixer support
dev-ruby/ruby-sdl:sge - Enable sdl-sge support
dev-ruby/rubygems:server - Install support for the rubygems server
dev-scheme/bigloo:bglpkg - Build bglpkg binary, which can be use to access scmpkg servers (requires web)
dev-scheme/bigloo:calendar - Build the embedded library for calendar programming
dev-scheme/bigloo:crypto - Build the embedded cryptographic library
dev-scheme/bigloo:debug - Enable extra debug codepaths
dev-scheme/bigloo:doc - Install Bigloo Manual (HTML docs of Bigloo and r5rs)
dev-scheme/bigloo:emacs - Build and install the Bigloo Developement Environment for Emacs (aka bee-mode)
dev-scheme/bigloo:gmp - Adds support for dev-libs/gmp (GNU MP library)
dev-scheme/bigloo:java - Enable the JVM backend for the Bigloo compiler
dev-scheme/bigloo:mail - Mail library for email management (e.g. maildir and imap support)
dev-scheme/bigloo:multimedia - Build multimedia library (e.g. for managing images). Needed for dev-scheme/hop
dev-scheme/bigloo:openpgp - Build OpenPGP support (requires crypto)
dev-scheme/bigloo:packrat - Bigloo port of Tony Garnock-Jones' packrat parser (requires srfi1)
dev-scheme/bigloo:sqlite - Use the system-wide dev-db/sqlite
dev-scheme/bigloo:srfi1 - Build the srfi1 library: List library
dev-scheme/bigloo:srfi27 - Build the srfi27 library: Source of Random Bits (32bit-arch only, requires gmp)
dev-scheme/bigloo:ssl - Adds support for SSL connections through dev-libs/openssl
dev-scheme/bigloo:text - Library for dealing with text (e.g. BibTeX parser)
dev-scheme/bigloo:threads - Enable thread support, it depends on dev-libs/boehm-gc built with threads use flag
dev-scheme/bigloo:web - Library for web programming (e.g. XML, CGI parsers). Needed for dev-scheme/hop
dev-scheme/chicken:parallel-build - Enable testing parallel build mode added in 4.7.3 version. Can still be not working
dev-scheme/gauche-gl:cg - Enable NVidia Cg binding
dev-scheme/gauche-gtk:glgd - Enable GL graph draw
dev-scheme/guile:debug-freelist - Include garbage collector freelist debugging code
dev-scheme/guile:debug-malloc - Include malloc debugging code
dev-scheme/guile:deprecated - Enable deprecated features
dev-scheme/guile:discouraged - (implied by deprecated) enable merely discouraged features
dev-scheme/guile:networking - Include networking interfaces
dev-scheme/guile:regex - Include regular expression interfaces
dev-scheme/hop:debug - Enables building with debug symbols
dev-scheme/hop:ssl - Enable SSL support for hop
dev-scheme/hop:threads - Enable thread support for hop, it depends on dev-scheme/bigloo built with threads use flag.
dev-scheme/kawa:awt - Assume AWT is available
dev-scheme/kawa:echo2 - Enable support for the Echo2 web toolkit with dev-java/echo2
dev-scheme/kawa:frontend - Build "kawa" front-end program using sys-libs/readline
dev-scheme/kawa:jemacs - Build JEmacs
dev-scheme/kawa:krl - Build BRL emulation and KRL
dev-scheme/kawa:sax - Assume SAX2 is available with dev-java/sax
dev-scheme/kawa:servlets - Build support for generating servlets with dev-java/servletapi
dev-scheme/kawa:swing - Assume Swing is available
dev-scheme/kawa:swt - Assume SWT is available with dev-java/swt
dev-scheme/kawa:xqtests - Support XQuery Test Suite
dev-scheme/racket:backtrace - Support GC backtrace dumps
dev-scheme/racket:futures - Enable racket/future library for fine-grained hardware parallelism
dev-scheme/racket:places - Enable racket/place library for share-nothing parallelism and message-passing communication. Compared to futures, places are heavyweight, but they have a simpler performance model.
dev-scheme/racket:plot - Enable plot libraries
dev-scheme/racket:threads - Enable support for green threads
dev-scheme/scm:arrays - Support for arrays, uniform-arrays and uniform-vectors.
dev-scheme/scm:bignums - Support for large precision integers.
dev-scheme/scm:cautious - SCM will always check the number of arguments to interpreted closures.
dev-scheme/scm:dynamic-linking - Be able to load compiled files while running.
dev-scheme/scm:engineering-notation - Floats to display in engineering notation (exponents always multiples of 3) instead of scientific notation.
dev-scheme/scm:gsubr - generalized c arguments: for arbitrary (more then 11) arguments to C functions.
dev-scheme/scm:inexact - Support for floating point numbers.
dev-scheme/scm:ioext - Commonly available I/O extensions: line I/O, file positioning, file delete and rename, and directory functions.
dev-scheme/scm:macro - C level support for hygienic and referentially transparent macros (syntax-rules macros).
dev-scheme/scm:regex - String regular expression matching.
dev-scheme/scm:unix - Support for: nice, acct, lstat, readlink, symlink, mknod and sync.
dev-tcltk/expect-lite:debug - pull in packages needed for runtime interactive debugger
dev-tcltk/tktreectrl:shellicon - shellicon extension
dev-tex/abntex:lyx - Install with app-office/lyx layout
dev-tex/circuit_macros:script - Install cm2pdf to automatically create a correctly sized PDF from a circuit_macro m4 source
dev-tex/dot2texi:pgf - Enable support for dev-tex/pgf (The TeX Portable Graphic Format)
dev-tex/dot2texi:pstricks - Enable pstricks support
dev-util/android-ndk:legacy-toolchains - Install legacy toolchains
dev-util/anjuta:devhelp - Enable devhelp integration
dev-util/anjuta:glade - Build glade plugin for anjuta
dev-util/anjuta:packagekit - Use packagekit to search for missing tools
dev-util/anjuta:terminal - Enable terminal plugin based on x11-libs/vte
dev-util/anjuta:vala - Enable support for the Vala programming language
dev-util/apitrace:egl - Enable EGL support
dev-util/buildbot:irc - Add support for status delivery through an ircbot.
dev-util/buildbot:mail - Add support for watching a maildir for commits.
dev-util/buildbot:manhole - Add support for manhole (debug over ssh)
dev-util/catalyst:ccache - Enables ccache support
dev-util/coccigrep:vim - Install the coccigrep vim plugin
dev-util/codeblocks:contrib - Build additional contrib components
dev-util/cppcheck:htmlreport - install cppcheck-htmlreport
dev-util/ctags:ada - Enable Ada support
dev-util/cwdiff:a2ps - install app-text/a2ps for postscript output
dev-util/cwdiff:mercurial - install hg wdiff alias for dev-vcs/mercurial
dev-util/devhelp:gedit - Install plugin for app-editors/gedit
dev-util/dialog:minimal - Disable library, install command-line program only
dev-util/emilpro:system-binutils - Use the gentoo binutils instead of building against an unpatched vanilla version
dev-util/fatrace:powertop - Add powetop integration
dev-util/geany:vte - Enable Terminal support (x11-libs/vte)
dev-util/geany-plugins:commander - Enable the commander plugin which provides a command panel for rapid access to any action.
dev-util/geany-plugins:debugger - Enable the debugger plugin which interfaces with sys-devel/gdb
dev-util/geany-plugins:devhelp - Enable the devhelp plugin which integrates dev-util/devhelp
dev-util/geany-plugins:enchant - Enable spell checking using enchant
dev-util/geany-plugins:gpg - Enable geanypg plugin which integrates GPG using app-crypt/gpgme
dev-util/geany-plugins:gtkspell - Use gtkspell for dictionary support
dev-util/geany-plugins:markdown - Enable the markdown plugin which uses app-text/discount and net-libs/webkit-gtk to display a realtime preview markdown.
dev-util/geany-plugins:multiterm - Enable the multiterm plugin
dev-util/geany-plugins:scope - Enable the scope plugin which is a graphical GDB front-end
dev-util/geany-plugins:soup - Enable updatechecker and geniuspaste plugins which require net-libs/libsoup
dev-util/geany-plugins:webkit - Enable webhelper plugin which requires net-libs/webkit-gtk
dev-util/global:vim - Integrate the GNU GLOBAL source code tag system with Vim
dev-util/google-perftools:debug - Build a set of libraries with debug support (so-called debugalloc). These are available by default but are not needed unless you're actually developing using tcmalloc.
dev-util/google-perftools:largepages - Use (experimental) larger pages for tcmalloc, this increases memory usage, but should speed up the allocation/free operations.
dev-util/google-perftools:minimal - Only build the tcmalloc_minimal library, ignoring the heap checker and the profilers.
dev-util/gtk-doc:highlight - Enable source code highlighting
dev-util/gtk-doc:vim - Enable source code highlighting through app-editors/vim
dev-util/intel-ocl-sdk:tools - Install Intel Offline Compiler
dev-util/kdevelop:cmake - Enable support for CMake build system
dev-util/kdevelop:okteta - Enable hex editor plugin
dev-util/kdevelop:qthelp - Enable support for QtHelp documentation browsing
dev-util/kdevelop:reviewboard - Enable reviewboard support
dev-util/kdevplatform:reviewboard - Enable reviewboard support
dev-util/ltrace:unwind - Use sys-libs/libunwind for frame unwinding support
dev-util/lttng-tools:ust - Support LTTng-UST (Userspace Tracing)
dev-util/meld:highlight - Enable source code highlighting via dev-python/pygtksourceview
dev-util/metro:ccache - Enable support for ccache
dev-util/metro:git - Enable support for git snapshots
dev-util/metro:threads - Enable support for pbzip2 tarball packing/unpacking
dev-util/mingw64-runtime:idl - Install idl files.
dev-util/molecule:plugins - Add plugins provided by dev-util/molecule-plugins
dev-util/monkeystudio:plugins - Build and install additional plugins
dev-util/nemiver:memoryview - Enable the optional hexadecimal memory inspection with app-editors/ghex.
dev-util/nsis:config-log - Enable the logging facility (useful in debugging installers)
dev-util/nvidia-cuda-sdk:cuda - Build CUDA binaries.
dev-util/nvidia-cuda-sdk:emulation - Build binaries for device emulation mode. These binaries will not require a CUDA-capable GPU to run.
dev-util/nvidia-cuda-sdk:opencl - Build OpenCL binaries.
dev-util/nvidia-cuda-toolkit:debugger - Installs the CUDA debugger.
dev-util/nvidia-cuda-toolkit:eclipse - Install the dev-util/eclipse-sdk plugins
dev-util/nvidia-cuda-toolkit:profiler - Installs the NVIDIA CUDA visual profiler.
dev-util/perf:audit - Enable support for sys-process/audit.
dev-util/perf:demangle - Enable C++ symbol name demangling, using libbfd from sys-devel/binutils. When this flag is enabled, the package will have to be rebuilt after every version bump of binutils.
dev-util/perf:doc - Build documentation and man pages. With this USE flag disabled, the --help parameter for perf and its sub-tools will not be available. This is optional because it depends on a few documentation handling tools that are not always welcome on user systems.
dev-util/perf:perl - Add support for Perl as a scripting language for perf tools.
dev-util/perf:unwind - Use sys-libs/libunwind for frame unwinding support.
dev-util/pkgconf:pkg-config - Install as a replacement for dev-util/pkgconfig
dev-util/pkgconf:strict - Adhere to POSIX pkg-config specification. Useful for finding uses of non-standard pkg-config invocations.
dev-util/pkgconfig:internal-glib - Use internal copy of dev-libs/glib
dev-util/pkgconfig-openbsd:pkg-config - Install as a replacement for dev-util/pkgconfig
dev-util/qbs:gui - Build QBS graphical configuration tool
dev-util/qdevelop:plugins - Build and install additional plugins
dev-util/reviewboard:codebase - Enables a build of the docs/codebase folder
dev-util/reviewboard:manual - Enables a build of the docs/manual folder
dev-util/reviewboard:rnotes - Enables a doc build of the release notes
dev-util/scanmem:gui - Enable the GameConqueror GUI
dev-util/schroot:btrfs - Enable support for chroots using btrfs snapshots.
dev-util/schroot:dchroot - Enables the building of a wrapper named "dchroot", replacing sys-apps/dchroot.
dev-util/schroot:lvm - Enable support for chroots using LVM snapshots.
dev-util/squashdelta:lz4 - Enable support for LZ4 compression using app-arch/lz4
dev-util/squashmerge:lz4 - Enable support for LZ4 compression using app-arch/lz4
dev-util/strace:aio - Enable dev-libs/libaio support for tracing Asynchronous I/O operations
dev-util/suse-build:symlink - Provide compatibility symlinks with original openSUSE package (might clash with other packages)
dev-util/universalindentgui:html - Add support for HTML files
dev-vcs/bzr:sftp - Enable sftp support
dev-vcs/bzr-gtk:gconf - Enable GConf support
dev-vcs/bzr-gtk:gpg - Support signing with GnuPG.
dev-vcs/bzr-gtk:nautilus - Integrate with Nautilus file manager
dev-vcs/bzr-gtk:sourceview - Enable GtkSourceView support
dev-vcs/cvs:server - Enable server support
dev-vcs/cvs2svn:bazaar - Support for dev-vcs/bzr
dev-vcs/fossil:json - Enable the JSON API of Fossil's wiki
dev-vcs/fossil:lineedit - Enable line-editing with libedit or readline
dev-vcs/fossil:sqlite - Use the system SQLite instead of the bundled one
dev-vcs/git:blksha1 - Use the new optimized SHA1 implementation
dev-vcs/git:cgi - Install gitweb too
dev-vcs/git:curl - Support fetching and pushing (requires webdav too) over http:// and https:// protocols
dev-vcs/git:gpg - Pull in gnupg for signing -- without gnupg, attempts at signing will fail at runtime!
dev-vcs/git:gtk - Include the gitview contrib tool
dev-vcs/git:highlight - GitWeb support for app-text/highlight
dev-vcs/git:mediawiki - Support pulling and pushing from MediaWiki
dev-vcs/git:ppcsha1 - Make use of a bundled routine that is optimized for the PPC arch
dev-vcs/git:subversion - Include git-svn for dev-vcs/subversion support
dev-vcs/git:webdav - Adds support for push'ing to HTTP/HTTPS repositories via DAV
dev-vcs/git-annex:android - Building for Android
dev-vcs/git-annex:androidsplice - Get TH splices for Android.
dev-vcs/git-annex:assistant - Enable git-annex assistant and watch command
dev-vcs/git-annex:cryptohash - Enable use of cryptohash for checksumming
dev-vcs/git-annex:dns - Enable the haskell DNS library for DNS lookup
dev-vcs/git-annex:ekg - Enable use of EKG to monitor git-annex as it runs.
dev-vcs/git-annex:feed - Enable podcast feed support
dev-vcs/git-annex:pairing - Enable pairing of git annex repositories
dev-vcs/git-annex:production - Enable production build (slower build; faster binary)
dev-vcs/git-annex:quvi - Enable use of quvi to download videos
dev-vcs/git-annex:s3 - Enable Amazon S3 remote
dev-vcs/git-annex:tahoe - Enable the tahoe special remote
dev-vcs/git-annex:tdfa - Use regex-tdfa for wildcards
dev-vcs/git-annex:testsuite - Embed the test suite into git-annex
dev-vcs/git-annex:webapp - Enable git-annex webapp
dev-vcs/git-annex:webdav - Enable webdav remote
dev-vcs/gitg:glade - Install a glade catalog file
dev-vcs/gitg:python - Install Python bindings for those plugins requiring it.
dev-vcs/gitolite:contrib - Install user-contributed files
dev-vcs/gitolite:tools - Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible
dev-vcs/gitolite-gentoo:contrib - Install user-contributed files
dev-vcs/gitolite-gentoo:tools - Install tools to e.g. convert a Gitosis config to gitolite or one to check if your setup is gitolite >= 3.x compatible
dev-vcs/mercurial:bugzilla - Support bugzilla integration.
dev-vcs/mercurial:gpg - Support signing with GnuPG.
dev-vcs/mercurial:tk - Install dev-lang/tk for hgk script.
dev-vcs/qct:bazaar - Support for dev-vcs/bzr
dev-vcs/qct:mercurial - Support for dev-vcs/mercurial
dev-vcs/qct:monotone - Support for dev-vcs/monotone
dev-vcs/rabbitvcs:cli - Eanble console based frontend
dev-vcs/rabbitvcs:diff - Use for diff command dev-util/meld
dev-vcs/rabbitvcs:gedit - Enable plugin for app-editors/gedit
dev-vcs/rabbitvcs:nautilus - Enable extension for gnome-base/nautilus
dev-vcs/rabbitvcs:thunar - Enable extension for xfce-base/thunar
dev-vcs/subversion:ctypes-python - Build and install Ctypes Python bindings
dev-vcs/subversion:dso - Enable runtime module search
dev-vcs/subversion:extras - Install extra scripts (examples, tools, hooks)
dev-vcs/subversion:http - Enable http support using net-libs/serf
dev-vcs/subversion:webdav-neon - Enable WebDAV support using net-libs/neon
dev-vcs/subversion:webdav-serf - Enable WebDAV support using net-libs/serf
games-action/awesomenauts:bundled-libs - Use the upstream provided bundled libraries.
games-action/beathazardultra:bundled-libs - Use the upstream provided bundled libraries.
games-action/chromium-bsu:mixer - Enables media-libs/sdl-mixer sound backend instead of media-libs/openal one.
games-action/d1x-rebirth:awe32 - Enable AWE32 support
games-action/d1x-rebirth:demo - Use the demo data instead of the full game
games-action/d1x-rebirth:linguas_de - Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
games-action/d1x-rebirth:mixer - Enable mixer support
games-action/d1x-rebirth:mpu401 - Enable MPU401 music support
games-action/d1x-rebirth:music - Support for ingame music
games-action/d1x-rebirth:opl3-musicpack - Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip
games-action/d1x-rebirth:sc55-musicpack - Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module
games-action/d2x-rebirth:awe32 - Enable AWE32 support
games-action/d2x-rebirth:demo - Install games-action/descent2-demodata as well
games-action/d2x-rebirth:linguas_de - Provides German translations for the game's briefings, robot descriptions, and outro of the original campaign
games-action/d2x-rebirth:mpu401 - Enable MPU401 music support
games-action/d2x-rebirth:music - Support for ingame music
games-action/d2x-rebirth:opl3-musicpack - Include alternate version of the game's music, recorded with the Yamaha YMF262 OPL3 soundchip
games-action/d2x-rebirth:sc55-musicpack - Include alternate version of the game's music, recorded with the Roland Sound Canvas SC-55 MIDI module
games-action/hotline-miami:bundled-libs - Use bundled libraries.
games-action/hotline-miami:launcher - Install qt launcher
games-action/minetest:leveldb - Enable LevelDB backend
games-action/minetest:luajit - Use dev-lang/luajit instead of dev-lang/lua
games-action/minetest:server - Build minetest server
games-action/openlierox:breakpad - Compile with support for breakpad crash reporting system
games-action/solar2:bundled-libs - Use the upstream provided bundled libraries.
games-action/super-hexagon:bundled-libs - Use the upstream provided bundled libraries.
games-action/supertuxkart:fribidi - Support for right-to-left languages
games-action/supertuxkart:wiimote - Support for wiimote input devices
games-action/swordandsworcery:bundled-libs - Use the upstream provided bundled libraries.
games-action/trine2:bundled-libs - Use bundled libraries.
games-action/trine2:launcher - Install gtk+ launcher
games-arcade/bomns:editor - enables building the level editor
games-arcade/burgerspace:network - Enable client-server support
games-arcade/commandergenius:tremor - Use media-libs/tremor as ogg decoder instead of media-libs/libvorbis
games-arcade/jumpnbump:music - Enable playing of background music
games-arcade/lbreakout2:themes - Install additional themes
games-arcade/moleinvasion:music - Download and install the music files
games-arcade/performous:midi - Enable MIDI I/O support
games-arcade/performous:songs - Install a few demo songs
games-arcade/performous:tools - Install tools
games-arcade/performous:webcam - Enable Webcam support
games-arcade/slimevolley:net - Enable network support
games-arcade/smc:music - Download and install the music files
games-arcade/tuxanci:physfs - Use dev-games/physfs instead of dev-libs/libzip to load compressed data
games-arcade/tuxanci:sound - Enable sound
games-board/chessdb:tb4 - Install 4 pieces table bases
games-board/cockatrice:server - Compile server support
games-board/crafty:no-opts - Don't try to enable crazy CFLAG options
games-board/freedoko:backgrounds - Install additional background images
games-board/freedoko:gnomecards - Install the gnome-games card set
games-board/freedoko:kdecards - Install the KDE card set
games-board/freedoko:net - Enable network game support
games-board/freedoko:openclipartcards - Install the openclipartcards card set
games-board/freedoko:pysolcards - Install the PySol card set
games-board/freedoko:xskatcards - Install the XSkat card set
games-board/grhino:gtp - Install the GTP (Go/Game Text Protocol) frontend
games-board/pasang-emas:extras - Install some extra themes
games-board/pioneers:help - Enable gnome ingame help via scrollkeeper
games-board/pysolfc:extra-cardsets - Install extra cardsets
games-board/pysolfc:sound - Enable sound support using dev-python/pygame
games-board/spider:athena - Enable athena widgets
games-board/xboard:default-font - Install the default font that xboard uses
games-board/xboard:zippy - Enable experimental zippy client
games-emulation/generator:sdlaudio - Enable SDL Audio
games-emulation/higan:profile_accuracy - Compile a binary optimized for accuracy
games-emulation/higan:profile_balanced - Compile a binary with balanced optimization
games-emulation/higan:profile_performance - Compile a binary optimized for performance
games-emulation/higan:udev - Enable udev based input
games-emulation/mednafen:debugger - Build with internal debugger
games-emulation/mupen64plus:audio-sdl - Enable SDL audio plugin.
games-emulation/mupen64plus:input-sdl - Enable SDL input plugin.
games-emulation/mupen64plus:rsp-hle - Enable HLE RSP plugin.
games-emulation/mupen64plus:ui-console - Enable default console UI.
games-emulation/mupen64plus:ui-m64py - Enable PyQt4 UI using games-emulation/m64py.
games-emulation/mupen64plus:video-glide64mk2 - Enable Glide64mk2 video plugin.
games-emulation/mupen64plus:video-rice - Enable Rice video plugin.
games-emulation/mupen64plus-core:new-dynarec - Enable new experimental dynamic recompiler implementation (only for x86 and arm)
games-emulation/mupen64plus-core:osd - Overlay emulator messages using on-screen-display
games-emulation/mupen64plus-video-glide64mk2:hires - Support hi-resolution textures (requires dev-libs/boost)
games-emulation/pcsxr:cdio - Use libcdio for CD support
games-emulation/pcsxr:sdl - Use SDL sound backend (other parts of SDL are used unconditionally)
games-emulation/snes9x:netplay - Enable playing ROMs over the network (not recommended)
games-emulation/snes9x:xrandr - Enable support for the X xrandr extension
games-emulation/vbam:link - Enable GBA linking functionality
games-emulation/yabause:qt4 - Use qt4 gui instead of gtk+
games-emulation/zsnes:debug - Enable the builtin debugger
games-emulation/zsnes:pax_kernel - Triggers a paxmarking of the binary
games-engines/frobtads:tads2compiler - Build TADS2 compiler
games-engines/frobtads:tads3compiler - Build TADS3 compiler
games-engines/odamex:master - Build master server target (advertises odamex server list)
games-engines/odamex:odalaunch - Build the wxwidgets based launcher.
games-engines/odamex:portmidi - Enable portmidi support.
games-engines/odamex:server - Build server target.
games-engines/renpy:development - Install IDE for game developers and an empty game template
games-engines/scummvm:fluidsynth - compile with support for fluidsynth
games-fps/alienarena:vidmode - Link against x11-libs/libXxf86vm. Required for full-screen support.
games-fps/darkplaces:cdsound - Enables using CD audio in the engine
games-fps/darkplaces:demo - Uses the demo data from quake1 (quake1-demodata)
games-fps/darkplaces:lights - Install and setup the updated light maps
games-fps/darkplaces:textures - Install and setup the updated textures
games-fps/doom-data:doomsday - Add wrapper to run it within doomsday
games-fps/doom3:roe - Adds support for the Resurrection of Evil expansion
games-fps/doomsday:demo - Install launcher dor doom1.wad from games-fps/doom-data
games-fps/doomsday:doom - Install launcher for jdoom game
games-fps/doomsday:fluidsynth - Build the FluidSynth sound driver
games-fps/doomsday:freedoom - Install launcher for doom1.wad from games-fps/freefoom
games-fps/doomsday:heretic - Install launcher for jheretic game
games-fps/doomsday:hexen - Install launcher for jhexen game
games-fps/doomsday:resources - Enable support for games-fps/doomsday-resources in jdoom launcher
games-fps/doomsday:snowberry - Install Snowberry doomsday front-end
games-fps/doomsday:tools - Build additional tools such as doomsday-shell, md2tool and texc
games-fps/duke3d:demo - Install the demo files
games-fps/duke3d:pic - disable optimized assembly code that is not PIC friendly
games-fps/duke3d-data:gog - Extract the data from the GOG.com installer.
games-fps/eduke32:demo - Install games-fps/duke3d-demodata as well
games-fps/eduke32:gtk - Compile with gtk launcher
games-fps/eduke32:offensive - Include optional XXX texture pack (needs USE 'textures')
games-fps/eduke32:opl-musicpack - Include optional OPL (AdLib) music pack
games-fps/eduke32:samples - Install samples
games-fps/eduke32:sc55-musicpack - Include optional Roland SC-55 music pack
games-fps/eduke32:server - Compile with server support
games-fps/eduke32:textures - Include optional high-resolution textures (needs USE 'opengl')
games-fps/eduke32:tools - Build several tools for modding and development
games-fps/eduke32:vpx - Enable support for WebM VP8 Codecs (needs USE 'opengl')
games-fps/ezquake-bin:security - install the security module needed for some servers
games-fps/lsdldoom:freedoom - Install games-fps/freedoom wad file
games-fps/lsdldoom:net - Enables network game support
games-fps/lsdldoom:shareware - Install games-fps/doom-data for shareware wad file
games-fps/nexuiz:maps - Install the community map pack
games-fps/quake2-icculus:demo - Install the demo files (quake2-demodata) and configure for use
games-fps/quake2-icculus:qmax - Build the pretty version (quake max)
games-fps/quake2-icculus:rogue - Build support for the 'Ground Zero' Mission Pack (rogue)
games-fps/quake2-icculus:xatrix - Build support for the 'The Reckoning' Mission Pack (xatrix)
games-fps/quake3:mumble - Adds player-location (positional audio) support to VoIP
games-fps/quake3:teamarena - Adds support for Team Arena expansion pack
games-fps/quake3:voice - Adds VoIP support
games-fps/quake3-bin:teamarena - Adds support for Team Arena expansion pack
games-fps/quakeforge:wildmidi - enable libWildMidi support
games-fps/quakeforge:xdg - enable XDG support
games-fps/qudos:demo - Install the demo files (quake2-demodata) and configure for use
games-fps/qudos:mods - Build support for the quake2 mission packs
games-fps/qudos:qmax - Build the pretty version (quake max)
games-fps/qudos:textures - Install the enhanced textures (quake2-textures)
games-fps/rott:demo - Install the shareware version
games-fps/sauerbraten:server - Compile server support
games-fps/turtlearena:mumble - Adds player-location (positional audio) support to VoIP
games-fps/turtlearena:server - Build server target
games-fps/turtlearena:voice - Adds VoIP support
games-fps/unreal-tournament-goty:S3TC - Add the extra fancy textures to UT ... only works on certain cards (nvidia/ati/s3)
games-fps/urbanterror:server - Build server target
games-fps/warsow:angelscript - Enable AngelScript support
games-fps/warsow:irc - Enable IRC support
games-fps/warsow:server - Build server binaries additionally
games-fps/worldofpadman:maps - Install extra maps (PadPack)
games-kids/crayon-physics:bundled-libs - Use the upstream provided bundled libraries.
games-misc/katawa-shoujo:system-renpy - Use games-engines/renpy instead of the bundled one (experimental)
games-misc/little-inferno:bundled-libs - Use bundled libraries.
games-misc/xcowsay:fortune - Installs the fortune-mod xcow binary
games-mud/tf:atcp - enable ATCP support.
games-mud/tf:gmcp - enable GMCP support.
games-mud/tf:option102 - enable telnet option 102 support.
games-puzzle/cuyo:music - Enable playing of background music
games-puzzle/jag:editor - Install level editor
games-puzzle/nightsky:bundled-libs - Use the upstream provided bundled libraries.
games-puzzle/pingus:music - Enable playing of background music
games-puzzle/tiny-and-big:bundled-libs - Use the upstream provided bundled libraries.
games-puzzle/xlogical:alt_gfx - Use alternate graphics which are closer to the original Amiga version
games-roguelike/FTL:bundled-libs - Use bundled libraries.
games-roguelike/angband:sound - Enable and install sounds
games-roguelike/stone-soup:ncurses - Enable for console based build (uses ncurses).
games-roguelike/stone-soup:tiles - Enable for graphical (tiled) build.
games-roguelike/tomenet:server - Compile server support
games-rpg/arx-fatalis-data:gog - Extract the data from the GOG.com installer.
games-rpg/arx-libertatis:c++0x - Build ROOT using the C++11 standard.
games-rpg/arx-libertatis:crash-reporter - Build a dev-qt/qtgui-based tool that allows to submit crash information to the upstream backtracker.
games-rpg/arx-libertatis:debug - Enable asserts and debug logging.
games-rpg/arx-libertatis:static - Link libraries statically, currently only media-libs/glew
games-rpg/arx-libertatis:tools - Build tools that can extract the game's data and save files.
games-rpg/arx-libertatis:unity-build - Build everything in one big source file, allowing for faster build times and better optimizations at the cost of higher memory usage.
games-rpg/bastion:bundled-libs - Use the upstream provided bundled libraries.
games-rpg/daimonin-client:music - Install extra music
games-rpg/drascula:sound - Install optional audio files
games-rpg/dungeon-defenders:bundled-libs - Use the upstream provided bundled libraries.
games-rpg/eternal-lands-data:bloodsuckermaps - Will install Bloodsucker's Maps in place of the official map files.
games-rpg/eternal-lands-data:music - Adds in-game music.
games-rpg/eternal-lands-data:sound - Adds in-game sound effects.
games-rpg/grimrock:bundled-libs - Use bundled libraries.
games-rpg/kqlives:cheats - Enable cheating mode
games-rpg/nwn:hou - Install the Hordes of the Underdark expansion pack
games-rpg/nwn:sou - Installs the Shadows of Undrentide expension pack
games-rpg/nwn-data:hou - Install the Hordes of the Underdark expansion pack
games-rpg/nwn-data:nowin - For those people who cant grab the 1.2 gigs of data files from a windows partition
games-rpg/nwn-data:sou - Installs the Shadows of Undrentide expension pack
games-rpg/sumwars:tools - Builds editor tools
games-rpg/to-the-moon:bundled-libs - Use bundled libraries
games-rpg/valyriatear:editor - Compile the Qt editor along with the game
games-simulation/corsix-th:ffmpeg - Use ffmpeg for playing in-game cutscenes.
games-simulation/corsix-th:midi - Use SDL mixer and timidity for in-game music.
games-simulation/corsix-th:opengl - Use OpenGL for rendering.
games-simulation/corsix-th:sdl - Use SDL for rendering.
games-simulation/corsix-th:sound - Use SDL mixer for in-game sound.
games-simulation/corsix-th:truetype - Use high quality fonts.
games-simulation/flightgear:fgpanel - Enables standalone lightweight 2D-panel rendering utility
games-simulation/flightgear:jsbsim - Enables JSBSim Flight Dynamics Model (default)
games-simulation/flightgear:oldfdm - Enables deprecated Flight Dynamics Models (LaRCsim, UIUC)
games-simulation/flightgear:subversion - Enables terrasync scenery downloader
games-simulation/flightgear:udev - Enables event-based Input devices through virtual/udev
games-simulation/flightgear:utils - Builds various utilities (fgpanel, terrasync, fgviewer among others)
games-simulation/flightgear:yasim - Enables YASim Flight Dynamics Model
games-simulation/openttd:aplaymidi - Enables midi music in game, using aplaymidi as an external player
games-simulation/openttd:dedicated - Build only the openttd server, and not the client.
games-simulation/openttd:lzo - Enables LZO compression for savegames. This is only needed to load extremely old savegames. (versions before 0.2)
games-simulation/openttd:openmedia - Enables the free open media sets: OpenGFX, OpenSFX, OpenMSX, removing the requirement for proprietary TTD assets to play OpenTTD.
games-simulation/singularity:music - Install music files
games-sports/speed-dreams:xrandr - Enable support for the X xrandr extension
games-sports/xmoto:editor - Depend on inkscape, scripts to convert svg to level (svg2lvl)
games-strategy/dark-oberon:fmod - Add sound support (fmod)
games-strategy/defcon-demo:system-libs - Use system libraries instead of the ones included in the upstream distribution.
games-strategy/freeciv:auth - Add authentication capability
games-strategy/freeciv:ggz - Add support for GGZ Gaming Zone
games-strategy/freeciv:sound - Add support for sound provided by media-libs/sdl-mixer
games-strategy/freeorion:cg - Add support for NVIDIA toolkit plugin
games-strategy/freesynd:devtools - Build development tools
games-strategy/heroes3:maps - Installs optional map data
games-strategy/heroes3:music - Installs optional music data
games-strategy/heroes3:sounds - Installs optional sound data
games-strategy/ja2-stracciatella:editor - Adds necessary file to run the editor
games-strategy/ja2-stracciatella:linguas_ru_gold - Support for russian gold ja2 version
games-strategy/liquidwar6:doc - Convert the info pages to html
games-strategy/liquidwar6:gles2 - Enable OpenGL ES 2.0 support
games-strategy/liquidwar6:gtk - Used to display error/critical messages
games-strategy/liquidwar6:maps - Install extra maps
games-strategy/liquidwar6:ogg - Enable mod-ogg via media-libs/sdl-mixer (currently the only sound provider)
games-strategy/liquidwar6:readline - Enable interactive script shell for hacking
games-strategy/megaglest:editor - Build map editor
games-strategy/megaglest:fribidi - Enable FriBIDi support
games-strategy/megaglest:model-viewer - Build model viewer
games-strategy/megaglest:streflop - Use the library streflop. Out of synchs may occur if not enabled.
games-strategy/megaglest:tools - Build model import/export tools
games-strategy/megaglest:unicode - Use unicode strings for wxwidgets
games-strategy/megaglest:wxuniversal - Use the wxUniversal port which implements the various GUI controls by drawing them itself
games-strategy/naev:mixer - Enables media-libs/sdl-mixer sound backend in addition to media-libs/openal one.
games-strategy/openra:cg - NVIDIA toolkit plugin
games-strategy/openra:tools - Install some development tools such as editor.
games-strategy/s25rttr:glfw - Compile another video driver based on media-libs/glfw.
games-strategy/seven-kingdoms:network - Enable support for multiplayer via media-libs/sdl-net
games-strategy/ufo-ai:editor - Build map editor
games-strategy/uqm:music - download and install music files (large)
games-strategy/uqm:remix - download and install music remix files (large)
games-strategy/uqm:voice - download and install voice files (large)
games-strategy/warzone2100:qt4 - Use qt-gui/qt-opengl for backend rendering instead of sdl
games-strategy/wesnoth:server - Enable compilation of server
games-util/gslist:web - Enable the web interface
games-util/pyfa:graph - Enable support for graphs
gnome-base/gconf:ldap - Build backend which enables default mail accounts, addressbooks and calendars for Evolution to be configured using each user's LDAP entry."
gnome-base/gconf:orbit - Use gnome-base/orbit for IPC, same as in gconf-2.x
gnome-base/gdm:audit - Enable support for sys-process/audit
gnome-base/gdm:consolekit - Allow proper handling of removable media according to who is actually present on the machine.
gnome-base/gdm:dmx - Enables Distributed Multihead X (DMX) support
gnome-base/gdm:fallback - Install x11-wm/metacity as fallback in case gnome-shell greeter fails to start
gnome-base/gdm:fprint - Enables experimental fingerprint authentication using sys-auth/fprintd
gnome-base/gdm:gnome-shell - Enables a greeter based on GNOME Shell (uses OpenGL)
gnome-base/gdm:plymouth - Enable support for smooth transition from sys-boot/plymouth
gnome-base/gdm:remote - Enables support for secure remote connections
gnome-base/gnome:classic - Install gnome-extra/gnome-shell-extensions for the Gnome Shell Classic mode
gnome-base/gnome:extras - Install additional GNOME applications
gnome-base/gnome:flashback - Install gnome-base/gnome-panel and x11-wm/metacity for the GNOME 3 Flashback mode
gnome-base/gnome-applets:cpufreq - Build cpu frequency scaling monitor applet
gnome-base/gnome-control-center:colord - Support color management using x11-misc/colord
gnome-base/gnome-control-center:gnome-online-accounts - Enable configuration panel for net-libs/gnome-online-accounts accounts
gnome-base/gnome-control-center:i18n - Enable support for enhanced input methods through app-i18n/ibus
gnome-base/gnome-control-center:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
gnome-base/gnome-control-center:socialweb - Add support for desktop background images from Flickr using net-libs/libsocialweb
gnome-base/gnome-desktop:license-docs - Install help files documenting GNOME's licenses
gnome-base/gnome-extra-apps:games - Install Gnome Games
gnome-base/gnome-extra-apps:shotwell - Install the media-gfx/shotwell photo manager
gnome-base/gnome-extra-apps:tracker - Install the app-misc/tracker indexer and the GNOME packages that require it
gnome-base/gnome-light:automount - Use gnome-base/gvfs[gdu] for automounting of drives in nautilus
gnome-base/gnome-light:gnome-shell - Install gnome-base/gnome-shell and x11-wm/mutter for the standard GNOME 3 desktop mode
gnome-base/gnome-panel:bonobo - Enable Bonobo compatibility modules for applets still not ported to DBUS.
gnome-base/gnome-session:gconf - Optional support for gnome-base/gconf configuration storage system
gnome-base/gnome-settings-daemon:colord - Support color management using x11-misc/colord
gnome-base/gnome-settings-daemon:i18n - Enable support for enhanced input methods through app-i18n/ibus
gnome-base/gnome-settings-daemon:openrc-force - Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
gnome-base/gnome-settings-daemon:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
gnome-base/gnome-settings-daemon:short-touchpad-timeout - Change the touchpad timeout so that it's effective for fast typists
gnome-base/gnome-shell:i18n - Enable support for enhanced input methods through app-i18n/ibus
gnome-base/gnome-shell:openrc-force - Skip systemd dependency (#480336), enabling this flag will become your setup to be fully unsupported by upstream and downstream Gnome team. Do not try to enable it unless completely needed
gnome-base/gvfs:afp - Enables support for accessing AFP (Apple Filing Protocol) network shares
gnome-base/gvfs:archive - Enables support for accessing files in archives transparently via app-arch/libarchive
gnome-base/gvfs:bluray - Enable playback of Blu-ray filesystems using media-libs/libbluray
gnome-base/gvfs:fuse - Enables fuse mount points in $HOME/.gvfs for legacy application access
gnome-base/gvfs:gdu - Enable sys-apps/gnome-disk-utility integration
gnome-base/gvfs:gnome-online-accounts - Enable configuration panel for net-libs/gnome-online-accounts accounts
gnome-base/gvfs:http - Enable the HTTP/DAV backend using net-libs/libsoup-gnome
gnome-base/gvfs:libsecret - Enable app-crypt/libsecret support to store login credentials.
gnome-base/gvfs:udev - Enable udev base replacement code for cdda feature
gnome-base/gvfs:udisks - Enable volume monitoring using sys-fs/udisks
gnome-base/libgnome-keyring:vala - Enable bindings for dev-lang/vala
gnome-base/libgnomecanvas:glade - Enable glade support
gnome-base/libgtop:introspection - Use dev-libs/gobject-introspection for introspection
gnome-base/librsvg:introspection - Use dev-libs/gobject-introspection for introspection
gnome-base/librsvg:tools - Build svg viewer tool
gnome-base/librsvg:vala - Enable bindings for dev-lang/vala
gnome-base/nautilus:packagekit - Use packagekit to search for programs to open unknown file types
gnome-base/nautilus:previewer - Use gnome-extra/sushi to preview files from the file mananger
gnome-base/nautilus:sendto - Enable the nautilus-sendto extension to send files to various locations/devices
gnome-base/nautilus:tracker - Add support for app-misc/tracker search
gnome-base/orbit:pic - Force libname-server-2 to be built as PIC; needed on hardened systems
gnome-extra/avant-window-navigator:gconf - Enable GConf as configuration backend
gnome-extra/avant-window-navigator:vala - Enable installation of dev-lang/vala binding
gnome-extra/avant-window-navigator-extras:gconf - Enable GConf as configuration backend
gnome-extra/evolution-data-server:api-doc-extras - Build documentation for private APIs
gnome-extra/evolution-data-server:gnome-online-accounts - Enable using net-libs/gnome-online-accounts for authorization
gnome-extra/evolution-data-server:vala - Build dev-lang/vala bindings
gnome-extra/evolution-data-server:weather - Enable optional weather calendar support
gnome-extra/file-browser-applet:gtkhotkey - Enable hotkey support via x11-libs/gtkhotkey
gnome-extra/gdesklets-core:dbus - Enable gDesklets Controls to use DBus
gnome-extra/gnome-boxes:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
gnome-extra/gnome-color-manager:clutter - Use media-libs/clutter to render color gamut representations
gnome-extra/gnome-color-manager:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit
gnome-extra/gnome-do-plugins:banshee - Enables the Banshee (media-sound/banshee) plugin
gnome-extra/gnome-dvb-daemon:totem - Build a plugin for media-video/totem
gnome-extra/gnome-dvb-daemon:vala - Add support for dev-lang/vala
gnome-extra/gnome-games:artworkextra - Installs extra artwork for various games
gnome-extra/gnome-media:twolame - Allow encoding MPEG Audio Layer 2 (MP2) files using twolame
gnome-extra/gnome-packagekit:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for rebooting
gnome-extra/gnome-power-manager:applet - Build battery monitor applet
gnome-extra/gnome-screensaver:systemd - Support sys-apps/systemd's logind
gnome-extra/gnome-system-monitor:systemd - Display sys-apps/systemd metadata, e.g. unit names, for running processes
gnome-extra/gnome-utils:bonobo - Enable applets (gdict one) still not ported to DBUS, requiring deprecated bonobo support in gnome-panel.
gnome-extra/gucharmap:vala - Enable bindings for dev-lang/vala
gnome-extra/libgda:bindist - Disable support for dev-db/firebird database which is not GPL compatible.
gnome-extra/libgda:canvas - Enable support for x11-libs/goocanvas
gnome-extra/libgda:http - Enable embedded net-libs/libsoup based server
gnome-extra/libgda:json - Enable support for JSON format
gnome-extra/libgda:libsecret - Enable app-crypt/libsecret support to store login credentials
gnome-extra/libgda:mdb - Enable support for Microsoft Access database using app-office/mdbtools
gnome-extra/libgda:reports - Install tools for generating graphical reports
gnome-extra/libgda:sourceview - Enable support for x11-libs/gtksourceview
gnome-extra/libgsf:gtk - Enable use of gdk in thumbnailer
gnome-extra/libgsf:introspection - Use dev-libs/gobject-introspection for introspection
gnome-extra/nautilus-actions:deprecated - Enable deprecated functions
gnome-extra/nautilus-sendto:gajim - Enables support for net-im/gajim
gnome-extra/nautilus-sendto:mail - Enables support for mailto using gnome-extra/evolution-data-server
gnome-extra/nautilus-sendto:pidgin - Enables support for net-im/pidgin
gnome-extra/nemo:introspection - Use dev-libs/gobject-introspection for introspection
gnome-extra/nemo:packagekit - Use packagekit to search for programs to open unknown file types
gnome-extra/nemo:tracker - Add support for app-misc/tracker search
gnome-extra/nm-applet:gconf - Build tool for migrating gconf settings from nm-applet-0.8.x
gnome-extra/nm-applet:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
gnome-extra/panflute:mpd - Enable MPD support
gnome-extra/sushi:office - Support viewing file formats such as generated by app-office/libreoffice
gnome-extra/synapse:plugins - Build support for plugins using librest
gnome-extra/synapse:zeitgeist - Add support for Zeitgeist event tracking system
gnome-extra/zeitgeist:datahub - Use build datahub for passive event injection
gnome-extra/zeitgeist:downloads-monitor - Monitor the XDG_DOWNLOAD_DIRECTORY
gnome-extra/zeitgeist:extensions - Use gnome-extra/zeitgeist-extentions to enhance the internal routines
gnome-extra/zeitgeist:fts - Enable the full text search extension
gnome-extra/zeitgeist:passiv - Use gnome-extra/zeitgeist-datahub to passively inject events
gnome-extra/zeitgeist:plugins - Use gnome-extra/zeitgeist-datasources to enable numerous packages to inject events
gnome-extra/zeitgeist:sql-debug - Enable SQL debugging
gnome-extra/zeitgeist:telepathy - Enable telepathy framework as data source
gnome-extra/zeitgeist-datahub:download - Monitor XDG download directory
gnome-extra/zeitgeist-datahub:telepathy - Telepathy logging support for 1-to-1 chats, calls and file transfers
gnome-extra/zeitgeist-datasources:bzr - Zeitgeist plugin for dev-vcs/bzr as data source
gnome-extra/zeitgeist-datasources:chromium - Zeitgeist plugin for www-client/chromium as data source
gnome-extra/zeitgeist-datasources:emacs - Zeitgeist plugin for emacs as data source
gnome-extra/zeitgeist-datasources:firefox - Zeitgeist plugin for www-client/firefox as data source
gnome-extra/zeitgeist-datasources:geany - Zeitgeist plugin for dev-util/geany as data source
gnome-extra/zeitgeist-datasources:telepathy - Zeitgeist plugin for telepathy framework as data source
gnome-extra/zeitgeist-datasources:thunderbird - Zeitgeist plugin for mail-client/thunderbird as data source
gnome-extra/zeitgeist-datasources:tomboy - Zeitgeist plugin for app-misc/tomboy as data source
gnome-extra/zeitgeist-datasources:vim - Zeitgeist plugin for vim as data source
gnome-extra/zeitgeist-datasources:xchat - Zeitgeist plugin for net-irc/xchat-gnome as data source
gnome-extra/zeitgeist-extensions:fts - Enable the full text search
gnome-extra/zeitgeist-extensions:geolocation - Add the physical location of the computer at the moment when events are inserted
gnome-extra/zeitgeist-extensions:memprofile - Memory profiling extension
gnome-extra/zeitgeist-extensions:sqldebug - debug zeitgeists sql statements
gnome-extra/zeitgeist-extensions:tracker - Notify Tracker on events
gnome-extra/zenity:compat - Installs gdialog for compatibility with older shell scripts which uses dev-lang/perl
gnustep-apps/gemas:projectcenter - Build and install plugin for gnustep-apps/projectcenter
gnustep-apps/gnumail:emoticon - Enable extra Emoticon Bundle to see smiley's in e-mail messages
gnustep-apps/gworkspace:gwmetadata - Enable the metadata indexing and searching system
gnustep-base/gnustep-back-art:xim - Enable X11 XiM input method
gnustep-base/gnustep-back-cairo:xim - Enable X11 XiM input method
gnustep-base/gnustep-back-xlib:xim - Enable X11 XiM input method
gnustep-base/gnustep-gui:speech - Audio support using app-accessibility/flite
gnustep-base/gnustep-make:libobjc2 - Enables use of the GNUstep Objective-C runtime (gnustep-base/libobjc2) with non-fragile ABI and sys-devel/clang compiler
gnustep-base/gnustep-make:native-exceptions - Enables use of the native Objective-C exception support (@try/@catch/@finally) built-in objective-c exceptions with compilers that support it
gnustep-base/libobjc2:boehm-gc - Enable Hans Boehm's garbage collector (dev-libs/boehm-gc). Not recommended by upstream
gpe-base/gpe:games - Builds and installs GPE games.
kde-base/ark:archive - Enable support for a variety of archive formats through libarchive
kde-base/cantor:R - Enable dev-lang/R backend support
kde-base/cantor:analitza - Enable kde-base/analitza backend support
kde-base/cantor:qalculate - Enable sci-libs/libqalculate backend support
kde-base/dolphin:thumbnail - Enables video thumbnails generation for kde-base/dolphin file manager.
kde-base/dolphin-plugins:bazaar - Enable support for the bazaar VCS
kde-base/dolphin-plugins:mercurial - Enable support for the mercurial VCS
kde-base/gwenview:kipi - Support for the KDE Image Plugin Interface.
kde-base/kaccessible:speechd - Enable support for the speech-dispatcher speech synthesizer
kde-base/kalzium:editor - Enable the embedded molecule editor/viewer
kde-base/kalzium:solver - Enable the equation solver
kde-base/kde-meta:sdk - Pull in developer-specific meta-packages
kde-base/kdeartwork-kscreensaver:eigen - Enable various arithmetic screensavers which use Eigen2 for computations.
kde-base/kdeartwork-kscreensaver:kexiv2 - Enable image rotation based on exif tags with libkexiv2.
kde-base/kdebase-data:wallpapers - Install the KDE wallpapers
kde-base/kdebase-kioslaves:sftp - Enable SFTP protocol support using net-libs/libssh
kde-base/kdebase-meta:wallpapers - Install the KDE wallpapers
kde-base/kdebase-startkde:wallpapers - Install the KDE wallpapers
kde-base/kdebindings-meta:csharp - Enable C# language bindings for KDE and Qt
kde-base/kdelibs:opengl - Enable OpenGL support for Plasma (GLApplet)
kde-base/kdelibs:udisks - Use udisks for block device access (e.g., automounting)
kde-base/kdelibs:upower - Use upower for power management
kde-base/kdenetwork-meta:ppp - Enable support for net-dialup/ppp.
kde-base/kdepim-runtime:facebook - Facebook service integration via net-libs/libkfbapi
kde-base/kdepim-runtime:google - Google service integration via net-libs/libkgapi
kde-base/kdepimlibs:prison - Enable support for QRcodes in contacts
kde-base/kdeplasma-addons:attica - Enable support for dev-libs/libattica
kde-base/kdeplasma-addons:desktopglobe - Enable Desktop Globe wallpaper using kde-base/marble
kde-base/kdeplasma-addons:fcitx - Use fcitx input method via app-i18n/fcitx
kde-base/kdeplasma-addons:ibus - Use ibus input method via app-i18n/ibus
kde-base/kdeplasma-addons:json - Enable JSON support via dev-libs/qjson
kde-base/kdeplasma-addons:oauth - Enable OAuth support via dev-libs/qoauth
kde-base/kdeplasma-addons:qalculate - Enable Qalculate runner using sci-libs/libqalculate
kde-base/kdeplasma-addons:qwt - Enable applets that use x11-libs/qwt:5.
kde-base/kdeplasma-addons:scim - Enable applets that use app-i18n/scim.
kde-base/kdeutils-meta:floppy - Install kde-base/kfloppy to format and create DOS or ext2fs filesystems in a floppy.
kde-base/kdm:consolekit - Enables support for authorization using consolekit
kde-base/kget:bittorrent - Enable bittorrent transfer plugin through net-libs/libktorrent
kde-base/kget:webkit - Enable KdeWebkit browser plugin using kde-misc/kwebkitpart
kde-base/kig:scripting - Support Python scripting
kde-base/kimono:akonadi - Compile bindings for Akonadi.
kde-base/kimono:plasma - Compile bindings for KDE's Plasma.
kde-base/klipper:prison - Enable support for barcodes/QRcodes
kde-base/kmix:canberra - Enable sound event support using media-libs/libcanberra
kde-base/konqueror:bookmarks - Add dependency on bookmark package.
kde-base/kopete:addbookmarks - Automatically add incoming urls to bookmarks.
kde-base/kopete:autoreplace - Automatically replace selected text
kde-base/kopete:contactnotes - Enables writing personal notes for contacts.
kde-base/kopete:gadu - Enable the Gadu protocol handler.
kde-base/kopete:groupwise - Enable the Groupwise protocol handler.
kde-base/kopete:highlight - Allows you to specify highlights on specific events.
kde-base/kopete:history - Enables saving chat history.
kde-base/kopete:latex - Embed latex formatted text into messages.
kde-base/kopete:meanwhile - Enable the Sametime protocol handler.
kde-base/kopete:msn - Enable "Windows live messenger" protocol support.
kde-base/kopete:nowlistening - Shows song you currently listen to in your status/etc. Bindings for many players.
kde-base/kopete:otr - Allows crypting your chat (drugs and talking nonsense are considered as good alternatives ;]).
kde-base/kopete:pipes - Send messages to external pipe.
kde-base/kopete:privacy - Filter for incoming messages
kde-base/kopete:skype - Enable Skype protocol handler (not fully functional yet).
kde-base/kopete:sms - Enable SMS sendinge functionality.
kde-base/kopete:statistics - Everybody loves statistic graphs, especially cake ones. ;]
kde-base/kopete:testbed - Enable the testbed protocol.
kde-base/kopete:texteffect - Various fancy text effects for your messages (don't ever consider writing us with this enabled ;]).
kde-base/kopete:translator - Translate incoming and outgoing messages.
kde-base/kopete:urlpicpreview - Enables in conversation pictures preview.
kde-base/kopete:webpresence - Show your status and some more information on web.
kde-base/kopete:winpopup - Enable pop-up messages sending on windows. (same as good old "net send" messages ;])
kde-base/kopete:yahoo - Enable yahoo protocol support.
kde-base/kopete:zeroconf - Enable Link-Local Messaging via the bonjour protocol.
kde-base/korundum:akonadi - Compile bindings for Akonadi.
kde-base/korundum:kate - Compile bindings for KDE Advanced Text Editor.
kde-base/korundum:okular - Compile bindings for kde-base/okular.
kde-base/krdc:rdesktop - Enable runtime dependency for net-misc/rdesktop
kde-base/krdc:telepathy - Enable desktop sharing through a telepathy client
kde-base/krfb:telepathy - Enable desktop sharing through a telepathy client
kde-base/ksnapshot:kipi - Support for the KDE Image Plugin Interface.
kde-base/kstars:fits - Enable support for the FITS image format through cfitsio
kde-base/kstars:indi - Enable support for Astronomical control library using libindi
kde-base/kwin:gles - Enable support for GLES.
kde-base/marble:designer-plugin - Enable designer plugin
kde-base/marble:shapefile - Enable support for ESRI shapefiles
kde-base/marble:zip - Enable support for reading and displaying .kmz files
kde-base/nepomuk-core:epub - Adds support for reading EPUB ebook metadata
kde-base/okular:chm - Enable support for Microsoft Compiled HTML Help files
kde-base/okular:ebook - Add E-Book support
kde-base/okular:mobi - Add mobipocket support
kde-base/oxygen-icons:bindist - Additionally install the svg sources of the bitmap icons (needed for redistribution)
kde-base/perlkde:akonadi - Compile bindings for Akonadi.
kde-base/perlkde:attica - Compile bindings for dev-libs/libattica.
kde-base/perlkde:kate - Compile bindings for KDE Advanced Text Editor.
kde-base/perlkde:okular - Compile bindings for kde-base/okular.
kde-base/perlqt:declarative - Compile bindings for dev-qt/qtdeclarative.
kde-base/perlqt:multimedia - Compile bindings for dev-qt/qtmultimedia.
kde-base/perlqt:phonon - Compile bindings for Phonon.
kde-base/perlqt:qimageblitz - Compile bindings for media-libs/qimageblitz.
kde-base/perlqt:qscintilla - Compile bindings for x11-libs/qscintilla.
kde-base/perlqt:qthelp - Compile bindings for QtHelp from dev-qt/qthelp.
kde-base/perlqt:qwt - Compile bindings for x11-libs/qwt.
kde-base/perlqt:webkit - Compile bindings for dev-qt/qtwebkit.
kde-base/plasma-workspace:json - Enable JSON support via dev-libs/qjson
kde-base/plasma-workspace:qalculate - Enable Qalculate runner using sci-libs/libqalculate
kde-base/powerdevil:pm-utils - Adds support for suspend/resume the system through sys-power/pm-utils
kde-base/poxml:extras - Build po2xml and swappo tools
kde-base/pykde4:semantic-desktop - Enables Nepomuk and Soprano python language bindings
kde-base/qtruby:declarative - Compile bindings for dev-qt/qtdeclarative.
kde-base/qtruby:phonon - Compile bindings for Phonon.
kde-base/qtruby:qscintilla - Compile bindings for x11-libs/qscintilla.
kde-base/qtruby:qwt - Compile bindings for x11-libs/qwt.
kde-base/qtruby:webkit - Compile bindings for dev-qt/qtwebkit.
kde-base/qyoto:phonon - Compile bindings for Phonon.
kde-base/qyoto:qscintilla - Compile bindings for x11-libs/qscintilla.
kde-base/qyoto:webkit - Compile bindings for dev-qt/qtwebkit.
kde-base/smokekde:attica - Compile bindings for dev-libs/libattica.
kde-base/smokekde:kate - Compile bindings for KDE Advanced Text Editor.
kde-base/smokekde:okular - Compile bindings for kde-base/okular.
kde-base/smokeqt:declarative - Compile bindings for dev-qt/qtdeclarative.
kde-base/smokeqt:multimedia - Compile bindings for dev-qt/qtmultimedia.
kde-base/smokeqt:phonon - Compile bindings for Phonon.
kde-base/smokeqt:qimageblitz - Compile bindings for media-libs/qimageblitz.
kde-base/smokeqt:qscintilla - Compile bindings for x11-libs/qscintilla.
kde-base/smokeqt:qthelp - Compile bindings for QtHelp from dev-qt/qthelp.
kde-base/smokeqt:qwt - Compile bindings for x11-libs/qwt.
kde-base/smokeqt:webkit - Compile bindings for dev-qt/qtwebkit.
kde-base/step:qalculate - Enable the libqalculate library for unit conversion
kde-misc/kcm-grub2:hwinfo - Used to work out supported framebuffer resolutions
kde-misc/kcm-grub2:imagemagick - Create splash images compatible with GRUB2
kde-misc/kcm-grub2:packagekit - Add support for packagekit integration
kde-misc/kepas:oscar - Enables ICQ (AIM) support.
kde-misc/krusader:bookmarks - Add dependency on bookmark package.
kde-misc/networkmanagement:openconnect - Build support for the OpenConnect VPN client
kde-misc/plasma-nm:modemmanager - Enable support for mobile broadband devices
kde-misc/plasma-nm:openconnect - Build support for the OpenConnect VPN client
kde-misc/synaptiks:upower - Handle mouse devices correctly across suspend and resume with upower
kde-misc/tellico:addressbook - Add support for kdepim addressbook (kabc)
lxde-base/lxdm:consolekit - Enables support for authorization using consolekit
lxde-base/lxdm:gtk3 - Use GTK+3 instead of 2
lxde-base/lxsession:upower - Pull in sys-power/upower for hibernate/suspend support
mail-client/alot:doc - Install user manual and API documentation
mail-client/alpine:chappa - enhance alpine by applying Eduardo Chappa's patches
mail-client/alpine:onlyalpine - installs only the alpine binary, so it does not collied with app-editors/pico and/or mail-client/pine
mail-client/alpine:passfile - Adds support for caching passwords into a file between sessions
mail-client/alpine:smime - Enable support for S/MIME
mail-client/alpine:topal - Enable support for net-mail/topal
mail-client/balsa:crypt - Adds support for GnuPG encryption
mail-client/balsa:gtkspell - Use gtkspell for dictionary support
mail-client/balsa:rubrica - Adds support for app-office/rubrica addressbook
mail-client/claws-mail:archive - Enable archiving plugin
mail-client/claws-mail:bogofilter - Build mail-filter/bogofilter plugin
mail-client/claws-mail:dillo - Enables support for inline HTTP email viewing with a plugin (which depends on the www-client/dillo browser)
mail-client/claws-mail:gdata - Enable plugin for access to Google data providers
mail-client/claws-mail:gtk3 - Build support for GTK+3
mail-client/claws-mail:libcanberra - Enable sound notification in connection with USE=notification
mail-client/claws-mail:libindicate - Enable notification through DBUS in connection with USE=notification
mail-client/claws-mail:libnotify - Enable notification on the desktop in connection with USE=notification
mail-client/claws-mail:notification - Notification for new mail in different way, see also USE flags libcanberra, libindicate and libnotify
mail-client/claws-mail:pgp - Enable PGP support
mail-client/claws-mail:smime - Build plugin for S/MIME support
mail-client/claws-mail:spam-report - Enable plugin for spam reporting to various services
mail-client/claws-mail:spamassassin - Build mail-filter/spamassassin plugin
mail-client/claws-mail:valgrind - Add support for memory debugging using valgrind
mail-client/evolution:bogofilter - Build mail-filter/bogofilter plugin
mail-client/evolution:clutter - Build with clutter support for animation effects
mail-client/evolution:crypt - Enable GPG encryption support using app-crypt/gnupg and app-crypt/pinentry
mail-client/evolution:gnome-online-accounts - Enable using net-libs/gnome-online-accounts for authorization
mail-client/evolution:highlight - Enable text highlighting plugin
mail-client/evolution:ldap - Enable support for fetching contacts from an LDAP or Active Directory server using net-nds/openldap
mail-client/evolution:map - Enable support for displaying contacts on a map inside evolution using media-libs/libchamplain
mail-client/evolution:networkmanager - Allows Evolution to automagically toggle online/offline mode by talking to net-misc/networkmanager and getting the current network state
mail-client/evolution:spamassassin - Build mail-filter/spamassassin plugin
mail-client/evolution:weather - Enable optional weather calendar support
mail-client/mail-notification:gmail - Enable Gmail mailbox checking
mail-client/mail-notification:mh - Enable MH mailbox checking
mail-client/mail-notification:pop - Enable support for pop
mail-client/mail-notification:sylpheed - Enable support for MH mailboxes used by mail-client/sylpheed
mail-client/mutt:gpg - Enable support for app-crypt/gpgme
mail-client/mutt:pop - Enable support for pop
mail-client/mutt:sidebar - Use the vanilla tree + sidebar patch
mail-client/mutt:smime - Enable support for smime
mail-client/mutt:smtp - Enable support for smtp
mail-client/mutt:tokyocabinet - Enable tokyocabinet database backend for header caching
mail-client/nail:kerberos - If network is enabled, this adds support for GSSAPI login on IMAP through virtual/kerberos.
mail-client/nail:net - Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call.
mail-client/nail:ssl - If network is enabled, this adds support for S/MIME and SSL/TLS-powered protocols through dev-libs/openssl.
mail-client/novell-groupwise-client:novell-jre - Use the Java Runtime Environment provided by Novell
mail-client/squirrelmail:filter - Enable mail-filter/amavisd-new filtering
mail-client/sylpheed:oniguruma - Use dev-libs/oniguruma for regular expression
mail-client/thunderbird:bindist - Disable official Thunderbird branding (icons, name) which are not binary-redistributable according to upstream.
mail-client/thunderbird:crypt - Enable encryption support with enigmail
mail-client/thunderbird:custom-optimization - Fine-tune custom compiler optimizations (-Os, -O0, -O1, -O2, -O3)
mail-client/thunderbird:gconf - Enable gnome2 gconf support
mail-client/thunderbird:ipc - Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes
mail-client/thunderbird:lightning - Enable calendar support
mail-client/thunderbird:minimal - Remove the software development kit and headers
mail-client/thunderbird:mozdom - Enable Mozilla's DOM inspector
mail-client/thunderbird:system-cairo - Use the system-wide x11-libs/cairo Use system cairo instead of bundled.
mail-client/thunderbird:system-icu - Use the system-wide dev-libs/icu Use system icu instead of bundled.
mail-client/thunderbird:system-jpeg - Use the system-wide media-libs/libjpeg-turbo Use system jpeg instead of bundled.
mail-client/thunderbird:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
mail-client/thunderbird-bin:crashreporter - Enable crash reporter for bugs
mail-filter/MailScanner:exim - Set mail-mta to used MTA
mail-filter/MailScanner:postfix - Set mail-mta/postfix to used MTA
mail-filter/MailScanner:spamassassin - Enable usage of mail-filter/spamassassin for spam protection
mail-filter/amavisd-new:courier - Add courier support
mail-filter/amavisd-new:dkim - Add DomainKeys Identified Mail support
mail-filter/amavisd-new:qmail - Add qmail support
mail-filter/amavisd-new:razor - Add support for mail-filter/razor
mail-filter/amavisd-new:spamassassin - Add support for mail-filter/spamassassin
mail-filter/amavisd-new:zmq - Add support for zeromq sockets
mail-filter/ask:procmail - Adds support for mail-filter/procmail
mail-filter/assp:spf - Adds support for Sender Policy Framework
mail-filter/assp:srs - Adds support for Sender Rewriting Scheme
mail-filter/bogofilter:tokyocabinet - Enable Tokyo Cabinet database support
mail-filter/clamassassin:clamd - Use the app-antivirus/clamav daemon for virus checking
mail-filter/clamassassin:subject-rewrite - Adds support for subject rewriting
mail-filter/dcc:rrdtool - Enable net-analyzer/rrdtool interface scripts
mail-filter/dspam:daemon - Enable support for DSPAM to run in --daemon mode
mail-filter/dspam:debug - Enable debugging support (don't enable this unless something needs testing!)
mail-filter/dspam:domain-scale - Build for domain scale setups - puts data to $HOME/data/domain.com/user
mail-filter/dspam:hash - Enable support for the file-orientated hash driver
mail-filter/dspam:large-scale - Build for large scale setups - puts data to $HOME/data/u/s/user
mail-filter/dspam:small-scale - Build for small scale setups - puts data to $HOME/data/user
mail-filter/dspam:user-homedirs - Build with user homedir support
mail-filter/dspam:virtual-users - Build with virtual-users support
mail-filter/libmilter:poll - Use poll instead of select
mail-filter/maildrop:authlib - Add courier-authlib support
mail-filter/maildrop:tools - Install maildirmake and deliverquota tools
mail-filter/maildrop:trashquota - Count deleted messages as part of the maildir quota
mail-filter/mimedefang:poll - Use poll instead of select
mail-filter/opendkim:ldap - Enable openldap as a dataset facilitator or keys, determining domains to sign for, and any other dataset that opendkim supports.
mail-filter/opendkim:lmdb - Add support for using dev-db/lmdb
mail-filter/opendkim:lua - Enables control over signature verification, filtering and policy to be controlled by user defined lua scripts.
mail-filter/opendkim:memcached - Add support for using dev-libs/libmemcached
mail-filter/opendkim:opendbx - Use opendbx backend to facilitate dataset driven OpenDKIM configuration options like stats, bodylengthdb, etc. against a wide variety of database types
mail-filter/opendkim:poll - Use poll() instead of select() for the provided asynchronous resolver library.
mail-filter/opendkim:sasl - Used to authenticate to a LDAP server in various ways if required.
mail-filter/opendkim:unbound - Use the unbound dnssec library to perform DKIM DNS queries.
mail-filter/postgrey:targrey - Enables the targrey patch
mail-filter/qmail-scanner:spamassassin - Build faster mail-filter/spamassassin checks into qmail-scanner
mail-filter/spamassassin:qmail - Build qmail functionality and docs
mail-filter/spamassassin-fuzzyocr:amavis - Enable support for mail-filter/amavisd-new
mail-filter/spamassassin-fuzzyocr:gocr - Enable support for the gocr OCR engine
mail-filter/spamassassin-fuzzyocr:logrotate - Install support files for app-admin/logrotate
mail-filter/spamassassin-fuzzyocr:ocrad - Enable support for the ocrad OCR engine
mail-filter/spamassassin-fuzzyocr:tesseract - Enable support for the tesseract OCR engine
mail-filter/spamdyke:tls - Enables TLS protocol for spamdyke
mail-filter/zdkimfilter:debug - Log process and signal information. Also leave the child process running for gdb examination.
mail-filter/zdkimfilter:mysql - MySQL client based statistics based storage.
mail-filter/zdkimfilter:opendbx - An alternate statistics based storage engine.
mail-mta/courier:fax - Enables fax support in the courier mail server
mail-mta/courier:norewrite - Prevents courier mail server from mangling virtual user addresses when sending
mail-mta/courier:web - Enable the web interface
mail-mta/courier:webmail - Enable the webmail interface
mail-mta/exim:dcc - Adds support for Distributed Checksum Clearinghouse (DCC)
mail-mta/exim:dkim - Adds support for DomainKeys Identified Mail (DKIM)
mail-mta/exim:dlfunc - Install local_scan.h header to compile separate dlfunc libraries
mail-mta/exim:dmarc - Adds support for DMARC
mail-mta/exim:dnsdb - Adds support for a DNS search for a record whose domain name is the supplied query
mail-mta/exim:dovecot-sasl - Adds support for Dovecot's authentication
mail-mta/exim:dsn - Adds support for Delivery Status Notifications (DSN)
mail-mta/exim:exiscan-acl - Patch providing support for content scanning
mail-mta/exim:lmtp - Adds support for lmtp
mail-mta/exim:mbx - Adds support for UW's mbx format
mail-mta/exim:pkcs11 - Require pkcs11 support in net-libs/gnutls with USE=gnutls
mail-mta/exim:prdr - Adds support for Per-Recipient Data Response
mail-mta/exim:redis - Adds support for querying dev-db/redis
mail-mta/exim:spf - Adds support for Sender Policy Framework
mail-mta/exim:srs - Adds support for Sender Rewriting Scheme
mail-mta/exim:tpda - Adds support for Transport Post-Delivery Actions
mail-mta/msmtp:mta - Enable this to install as system-wide MTA
mail-mta/netqmail:authcram - Enable AUTHCRAM support
mail-mta/netqmail:gencertdaily - Generate SSL certificates daily instead of hourly
mail-mta/netqmail:highvolume - Prepare netqmail for high volume servers
mail-mta/netqmail:noauthcram - If you do NOT want AUTHCRAM to be available
mail-mta/opensmtpd:mta - Enable this to install as system-wide MTA
mail-mta/postfix:dovecot-sasl - Enable net-mail/dovecot protocol version 1 (server only) SASL implementation
mail-mta/postfix:ldap-bind - Adds support for binding to LDAP backend using dev-libs/cyrus-sasl
mail-mta/postfix:lmdb - Adds support for using dev-db/lmdb for lookup tables
mail-mta/postfix:memcached - Adds support for using net-misc/memcached for lookup tables
mail-mta/postfix:vda - Adds support for virtual delivery agent quota enforcing
mail-mta/qmail-ldap:cluster - Enable this if you want to have cluster support in qmail-ldap
mail-mta/qmail-ldap:gencertdaily - Generate SSL certificates daily instead of hourly
mail-mta/qmail-ldap:highvolume - Prepare qmail for high volume servers
mail-mta/qmail-ldap:rfc2307 - Add support for RFC2307 compliant uid/gid attributes
mail-mta/qmail-ldap:rfc822 - Add support for RFC822 compliant mail attributes
mail-mta/qpsmtpd:postfix - create user with permissions for proper postfix interaction
mail-mta/ssmtp:mta - Install symlinks for sendmail-compatible MTA.
mate-base/mate:extras - Install additional MATE applications
mate-base/mate-file-manager:mate - Install x11-themes/mate-icon-theme which is needed when this package is used in the MATE desktop environment.
mate-base/mate-file-manager:unique - Enable single instance support using dev-libs/libunique.
mate-base/mate-keyring:gpg-agent - Include GPG agent in mate-keyring.
mate-base/mate-keyring:ssh-agent - Include SSH agent in mate-keyring.
mate-extra/mate-file-manager-sendto:gajim - Enables support for net-im/gajim
mate-extra/mate-file-manager-sendto:mail - Enables support for mailto using gnome-extra/evolution-data-server
mate-extra/mate-file-manager-sendto:pidgin - Enables support for net-im/pidgin
mate-extra/mate-media:twolame - Bring in twolame gstreamer support
mate-extra/mate-power-manager:applet - Enable building of the MATE applet.
mate-extra/mate-power-manager:man - Build power manager's man page.
mate-extra/mate-power-manager:unique - Enable single instance support using dev-libs/libunique.
mate-extra/mate-screensaver:consolekit - Enable support for sys-auth/consolkekit
mate-extra/mate-utils:applet - Enable the mate dictionary applet
media-fonts/culmus:ancient - Install ancient semitic scripts
media-fonts/culmus:fancy - Install fancy fonts
media-fonts/culmus:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/culmus:taamey - Install taamey fonts
media-fonts/culmus-ancient:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/dejavu:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/intlfonts:bdf - Installs BDF fonts in addition to PCF
media-fonts/liberation-fonts:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/montecarlo:bdf - Install BDF fonts in addition to PCF
media-fonts/mplus-outline-fonts:ipafont - Generates new fonts merged with media-fonts/ja-ipafonts
media-fonts/sil-charis:compact - Use more compactly spaced font
media-fonts/sil-gentium:compact - Also install more compact version of the font.
media-fonts/terminus-font:a-like-o - Changes view of letter 'a' - a looks like o (see homepage)
media-fonts/terminus-font:center-tilde - Place the '~' character vertically centered on the line instead of to the top.
media-fonts/terminus-font:distinct-l - ll2 variant with more distinctive l (lowercase L)
media-fonts/terminus-font:pcf - Install Portable Compiled Font (PCF) (required for X11)
media-fonts/terminus-font:psf - Install PC Screen Font (PSF) with unicode data (for linux console)
media-fonts/terminus-font:quote - Changes view of quotes: symmetric ` and ' instead of asymmetric one (see homepage)
media-fonts/terminus-font:raw-font-data - Install RAW font data which should be compatible with most UNIX systems (you don't need this on linux)
media-fonts/terminus-font:ru-dv - Changes view of Russian letters 'de' and 've' (see homepage)
media-fonts/terminus-font:ru-g - Changes view of Russian letter 'ge' (see homepage)
media-fonts/terminus-font:ru-i - Changes view of Russian letter 'i' - not like Latin u, but like "mirrored" N (see homepage)
media-fonts/terminus-font:ru-k - Changes view of Russian letter 'k' (see homepage)
media-fonts/unifont:fontforge - Use media-gfx/fontforge to build fonts from source
media-fonts/unifont:utils - Install unifont utilities
media-gfx/album:plugins - Install optional plugins
media-gfx/album:themes - Install optional themes
media-gfx/assimp:boost - Build assimp with boost support
media-gfx/assimp:samples - Build viewer library
media-gfx/assimp:tools - Build assimp tool binary
media-gfx/asymptote:boehm-gc - Enables using the Boehm-Demers-Weiser conservative garbage collector
media-gfx/asymptote:offscreen - Enables off-screen rendering
media-gfx/asymptote:sigsegv - Enables using dev-libs/libsigsegv
media-gfx/blender:3dmouse - Adds support for space navigator devices through package dev-libs/libspnav.
media-gfx/blender:boost - Enable features depending on boost.
media-gfx/blender:bullet - Enable Bullet (Physics Engine).
media-gfx/blender:collada - Add support for Collada interchange format through media-libs/opencollada.
media-gfx/blender:colorio - Enable OpenColorIO color management.
media-gfx/blender:cycles - Build cycles renderer (requires media-libs/openimageio and dev-libs/boost).
media-gfx/blender:dds - Adds DDS textures support to Blender.
media-gfx/blender:doc - Build C and Python API documentation directly from the source code.
media-gfx/blender:elbeem - Adds surface fluid simulation to Blender using El'Beem library.
media-gfx/blender:game-engine - Adds Game Engine support to Blender.
media-gfx/blender:ndof - Enable NDOF input devices (SpaceNavigator and friends).
media-gfx/blender:openimageio - Enable OpenImageIO Support
media-gfx/blender:opennl - Enable use of Open Numerical Library
media-gfx/blender:player - Build the Blender Player. THis requires the Game engine.
media-gfx/blender:redcode - This flag add support for RED CODE camera digital format (5K HD images *.r3d) - EXPERIMENTAL.
media-gfx/blender:tweak-mode - This flag allows you to model without confirming each translation, in particular it lets you grab with left mouse button (LMB) and not having to confirm by another click. Blender 'Tweak Mode' is similar to the 'Tweak Mode' of the Wings modeller (media-gfx/wings).
media-gfx/brlcad:benchmarks - Run benchmarks during test phase (need test option enabled)
media-gfx/comix:rar - Pulls app-arch/unrar for rar file support
media-gfx/darktable:colord - Support color management using x11-misc/colord
media-gfx/darktable:flickr - Add support for uploading photos to flickr
media-gfx/darktable:geo - Enable geotagging support
media-gfx/darktable:graphicsmagick - Use media-gfx/graphicsmagick for image importing
media-gfx/darktable:opencl - Enable opencl support
media-gfx/darktable:pax_kernel - Triggers paxmarking of main darktable binary
media-gfx/darktable:rawspeed - Enable the rawspeed backend
media-gfx/darktable:slideshow - Build the opengl slideshow viewer
media-gfx/darktable:squish - Enable thumbnail compression via libsquish
media-gfx/darktable:web-services - Add support for uploading photos to facebook and picasa
media-gfx/darktable:webp - Enable WebP export support
media-gfx/digikam:addressbook - Add support for kdepim
media-gfx/digikam:linguas_ha - Hausa translation
media-gfx/digikam:linguas_mi - Maori translation
media-gfx/digikam:linguas_ven - Venda translation
media-gfx/digikam:themedesigner - Build the digikam theme designer
media-gfx/digikam:thumbnails - Enable thumbnails database support
media-gfx/digikam:video - Pull in mplayerthumbs to enable video thumbnails
media-gfx/enblend:gpu - GPU support for Enblend
media-gfx/enblend:image-cache - allow for processing of large images
media-gfx/eog-plugins:flickr - Enable uploading to Flickr
media-gfx/eog-plugins:map - Enable world map display using media-libs/libchamplain
media-gfx/eog-plugins:picasa - Enable uploading to Google's Picasa Web Albums
media-gfx/exact-image:swig - Adds Swig support dev-lang/swig
media-gfx/exiv2:contrib - Build additional contrib components
media-gfx/f-spot:flickr - Enable building of the Flickr exported.
media-gfx/fbida:X - Install the Motif based image viewer "ida"
media-gfx/fbida:fbcon - Install the framebuffer image viewer "fbi"
media-gfx/fbida:webp - Enable support for the WebP image format
media-gfx/fim:dia - Enable DIA file support via app-office/dia
media-gfx/fim:graphicsmagick - Enable GraphicsMagick library support
media-gfx/fim:imagemagick - Use convert from media-gfx/imagemagick as fallback file opener
media-gfx/fim:xfig - Enable FIG file support via media-gfx/xfig
media-gfx/fontforge:cjk - Controls whether fontforge understands the gb12345 encoding and installs cidmap package to edit CID-keyed fonts
media-gfx/fontforge:pango - Enable pango font rendering
media-gfx/fontforge:pasteafter - Controls whether fontforge has a paste after command (Useful for making words?). This is kind of fun, but it isn't useful for normal fonts.
media-gfx/fontforge:tilepath - Controls whether fontforge has a tile path command (a variant of expand stroke) This is useful for very decorative fonts, most people won't want it.
media-gfx/fontforge:truetype-debugger - Enable truetype debugger in fontforge
media-gfx/fontforge:type3 - Build in support for type3/svg fonts containing multilayered drawing with strokes, fills, images, etc. Type3 fonts are only supported by postscript printers (not by most windowing displays). They are capable of more exotic images than normal fonts but require much more effort to support.
media-gfx/fotowall:webcam - Enable webcam support
media-gfx/freewrl:glew - Enable glew extensions
media-gfx/freewrl:java - Build and install java EAI/SAI support library
media-gfx/freewrl:libeai - Build EAI C library
media-gfx/freewrl:osc - Allows for OSC-based control and communication between multiple freewrl instances
media-gfx/gimp:smp - Enable support for multiprocessors
media-gfx/gmic:graphicsmagick - Enable support for many common image file formats using the GraphicsMagick++ library
media-gfx/gmic:opencv - Enable support for webcams using the OpenCV library
media-gfx/graphicsmagick:fpx - Enable FlashPix support with media-libs/libfpx
media-gfx/graphicsmagick:modules - Compile graphicsmagick with dynamically loadable modules
media-gfx/graphicsmagick:q16 - Set storage quantum size to 16 (~2*memory)
media-gfx/graphicsmagick:q32 - Set storage quantum size to 32 (~5*memory)
media-gfx/graphicsmagick:webp - Enable support for webp image format
media-gfx/graphviz:X - Builds lefty front-end, builds plugin -Txlib, and enables support for x11 in various other modules (needs cairo)
media-gfx/graphviz:devil - Enables DevIL output plugin -Tdevil
media-gfx/graphviz:gdk-pixbuf - Enables gdk-pixbuf2 plugin
media-gfx/graphviz:gtk - Enables gtk+ output plugin -Tgtk (needs cairo)
media-gfx/graphviz:gts - Enables support for gts
media-gfx/graphviz:lasi - Enables PostScript output via media-libs/lasi, for plugin -Tlasi (needs cairo)
media-gfx/graphviz:qt4 - Builds gvedit front-end
media-gfx/gthumb:http - Enable webservice integration through net-libs/libsoup
media-gfx/gthumb:json - Compile code that uses the libjson-glib library
media-gfx/gthumb:libsecret - Enable libsecret support to store login credentials
media-gfx/gthumb:slideshow - Enable slideshow plugin
media-gfx/gthumb:webp - Enable support for webp image format
media-gfx/hugin:sift - automatically align images with media-gfx/autopano-sift or media-gfx/autopano-sift-C
media-gfx/imagemagick:autotrace - Use media-gfx/autotrace to convert bitmaps into vector graphics
media-gfx/imagemagick:corefonts - Use media-fonts/corefonts which is required by some commands
media-gfx/imagemagick:fpx - Enable media-libs/libfpx support
media-gfx/imagemagick:hdri - enable High Dynamic Range Images formats
media-gfx/imagemagick:lqr - Enable experimental liquid rescale support using media-libs/liblqr
media-gfx/imagemagick:opencl - Enable OpenCL support
media-gfx/imagemagick:pango - Enable Pango support using x11-libs/pango
media-gfx/imagemagick:q32 - Set quantum depth value to 32
media-gfx/imagemagick:q64 - Set quantum depth value to 64
media-gfx/imagemagick:q8 - Set quantum depth value to 8
media-gfx/imagemagick:webp - Enable webp image format support using media-libs/libwebp
media-gfx/imageworsener:webp - enable webp image format support
media-gfx/inkscape:dia - pull in app-office/dia for dia import extension
media-gfx/inkscape:inkjar - enables support for OpenOffice.org SVG jar files
media-gfx/iscan-plugin-gt-f500:minimal - Install the firmware only, and not the plugin.
media-gfx/jpeg2ps:metric - Default to A4 paper size
media-gfx/k3d:3ds - Enable support for 3D Studio models
media-gfx/k3d:cuda - Use nvidia cuda toolkit for speeding up computations
media-gfx/k3d:gts - Add Support for the GNU Triangulated Surface Library sci-libs/gts
media-gfx/kphotoalbum:geolocation - Add support for kde-base/marble
media-gfx/kphotoalbum:kipi - Support for the KDE Image Plugin Interface
media-gfx/librecad:tools - Build additional tool programs
media-gfx/nip2:goffice - use x11-libs/goffice to show plots
media-gfx/nomacs:webp - Build support for WEBP image format
media-gfx/nvidia-texture-tools:cg - Enable NVIDIA C graphics compiler toolkit plug-in
media-gfx/nvidia-texture-tools:cuda - Enable NVIDIA CUDA toolkit support
media-gfx/nvidia-texture-tools:glew - Enable support for The OpenGL Extension Wrangler Library (media-libs/glew)
media-gfx/openclipart:gzip - Compresses clip art using gzip
media-gfx/openexr_viewers:cg - Add support for nvidia's cg shaders
media-gfx/pngcrush:system-libs - Use libpng and libz provided by system
media-gfx/postr:gnome2 - Install plugin for =gnome-base/nautilus-2*. Warning: will make =nautilus-3* crash.
media-gfx/potrace:metric - default to a4 paper size and metric measurement
media-gfx/povray:io-restrictions - POV-Ray's mechanism for control of I/O operations
media-gfx/povray:mkl - Enable support for Intel Vector Math Library, part of sci-libs/mkl
media-gfx/pstoedit:emf - Enable media-libs/libemf support
media-gfx/pstoedit:flash - Enable media-libs/ming SWF support
media-gfx/pstoedit:pptx - Enable support for generating PowerPoint pptx files
media-gfx/qiv:magic - Use libmagic to determine mimetypes
media-gfx/qiviewer:webp - Build support for WEBP image format
media-gfx/splashutils:fbcondecor - Support for the fbcondecor kernel patch.
media-gfx/ufraw:contrast - enable contrast setting option
media-gfx/ufraw:fits - Enable support for the FITS image format through sci-libs/cfitsio
media-gfx/ufraw:timezone - enable DST correction for file timestamps
media-gfx/xpaint:pgf - Support for loading PGF images
media-gfx/xsane:ocr - Enable support for Optical Character Recognition reader
media-gfx/yafaray:blender - install media-gfx/blender scripts
media-libs/a52dec:djbfft - Prefer D.J. Bernstein's library for fourier transforms
media-libs/allegro:dumb - Enable media-libs/dumb module library support
media-libs/allegro:physfs - Enable physfs support
media-libs/allegro:vga - Enables the VGA graphics driver
media-libs/alsa-lib:alisp - Enable support for ALISP (ALSA LISP) interpreter for advanced features.
media-libs/alure:dumb - Enable media-libs/dumb module library support
media-libs/alure:fluidsynth - Enables Fluidsynth MIDI software synthesis
media-libs/aubio:double-precision - Compile in double precision mode.
media-libs/avidemux-core:aften - Enable A/52 (AC-3) audio encoder support.
media-libs/avidemux-core:amr - Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
media-libs/avidemux-core:system-ffmpeg - Use the ffmpeg provided by the system.
media-libs/avidemux-core:vaapi - Enable VAAPI (Video Acceleration API) for hardware decoding.
media-libs/avidemux-plugins:aften - Enable A/52 (AC-3) audio encoder support.
media-libs/avidemux-plugins:amr - Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
media-libs/avidemux-plugins:faac - Enable free MPEG-4 audio codecs support via media-libs/faac.
media-libs/avidemux-plugins:faad - Enable AAC audio decoding library support via media-libs/faad2.
media-libs/avidemux-plugins:fribidi - Enable unicode bidirectional algorithm support via dev-libs/fribidi.
media-libs/avidemux-plugins:twolame - Enable TwoLAME support via media-sound/twolame, an optimised MPEG Audio Layer 2 (MP2) encoder.
media-libs/avidemux-plugins:vpx - Enable WebM VP8 Codec SDK support via media-libs/libvpx.
media-libs/babl:introspection - Use dev-libs/gobject-introspection for introspection
media-libs/babl:vala - Enable bindings for dev-lang/vala
media-libs/cal3d:16bit-indices - Enables use of 16bit indices
media-libs/chromaprint:tools - Build and install fpcalc and fpcollect tools
media-libs/clutter:gtk - Use gdk-pixbuf from x11-libs/gtk+ as image rendering backend
media-libs/cogl:gles2 - Enable OpenGL ES 2.0 support
media-libs/cogl:pango - Build cogl-pango library for x11-libs/pango integration
media-libs/coin:simage - Texture loading via media-libs/simage library
media-libs/devil:allegro - Add support for Allegro
media-libs/devil:nvtt - Add support for dev-util/nvidia-texture-tools
media-libs/edje:cache - Enable caching
media-libs/elementary:dbus - Enable integration with dev-libs/e_dbus.
media-libs/elementary:emotion - Add support for media-libs/emotion
media-libs/elementary:ethumb - Add support for media-libs/ethumb
media-libs/elementary:quicklaunch - Enable quick-launch support
media-libs/elementary:xdg - Enable integration with dev-libs/efreet for cross-desktop standards (freedesktop.org).
media-libs/emotion:vlc - Enable support for the media-video/vlc player backend
media-libs/esdl:image - Enable image support
media-libs/ethumb:emotion - Add support for media-libs/emotion
media-libs/evas:bmp - Support windows bitmap (bmp) image loader
media-libs/evas:eet - Support dev-libs/eet
media-libs/evas:gles - Enable gles flavor of gl instead of standard
media-libs/evas:ico - Support windows icon (ico) image loader
media-libs/evas:ppm - Support PPM image loader
media-libs/evas:psd - Support PSD image loader
media-libs/evas:tga - Support tga image loader
media-libs/evas:wayland - Add support for dev-libs/wayland
media-libs/faad2:digitalradio - Digital Radio Mondiale (warning: disables other decoders)
media-libs/flickcurl:raptor - Use media-libs/raptor for proper RDF serializing
media-libs/fontconfig-infinality:nyx - Additional style using croscorefonts
media-libs/freeglut:mpx - Enable support for multi-pointer-X. One pointer for each pointer device.
media-libs/freetype:adobe-cff - Use Adobe CFF as default font-renderer
media-libs/freetype:auto-hinter - Use the unpatented auto-hinter instead of the (recommended) TrueType bytecode interpreter
media-libs/freetype:bzip2 - Support bzip2 compressed PCF fonts.
media-libs/freetype:fontforge - Install internal headers required for TrueType debugger in media-gfx/fontforge (built with USE=truetype-debugger)
media-libs/freetype:harfbuzz - Use media-libs/harfbuzz for auto-hinting OpenType fonts. WARNING: may trigger circular dependencies!
media-libs/freetype:infinality - Enable infinality options for improved LCD filtering
media-libs/freetype:utils - Install utilities and examples from ft2demos
media-libs/freeverb3:audacious - Build Audacious plugin
media-libs/freeverb3:avx - Adds support for Advanced Vector Extensions instructions
media-libs/freeverb3:forcefpu - Disable assembly code
media-libs/freeverb3:plugdouble - Build plugins in double precision mode (default is float)
media-libs/freeverb3:sse3 - Enable SSE3 support
media-libs/freeverb3:sse4 - Enable SSE4 support
media-libs/gegl:introspection - Use dev-libs/gobject-introspection for introspection.
media-libs/gegl:lensfun - Enable support for media-libs/lensfun.
media-libs/gegl:umfpack - Enable sparse solving via sci-libs/umfpack.
media-libs/gegl:vala - Enable bindings for dev-lang/vala
media-libs/giflib:rle - Build converters for RLE format (utah raster toolkit)
media-libs/glfw:egl - Use EGL instead of GLX for GL context creation
media-libs/gmtk:dconf - Enable support for gnome-base/dconf
media-libs/grilo:network - Enable network access for media discovery using net-libs/libsoup
media-libs/grilo:playlist - Enable support for playlists through dev-libs/totem-pl-parser
media-libs/grilo:vala - Generate bindings for dev-lang/vala
media-libs/gst-plugins-bad:egl - Enable EGL support
media-libs/gst-plugins-base:ivorbis - Enable integer based vorbis decoder.
media-libs/gst-plugins-base:pango - Enable pango GStreamer plugin
media-libs/gst-rtsp-server:introspection - Use dev-libs/gobject-introspection for introspection
media-libs/gst-rtsp-server:vala - Add support for dev-lang/vala
media-libs/gstreamer:orc - Disable some PaX memory protections to allow plugins that use dev-lang/orc for runtime optimization to be used on hardened PaX systems
media-libs/harfbuzz:glib - Compile with GLib Unicode support
media-libs/harfbuzz:graphite - Use graphite to render complex non-Roman writing systems
media-libs/jbig2enc:webp - Add support for WEBP image format
media-libs/leptonica:utils - Install command-line utilities
media-libs/leptonica:webp - Adds support for the WebP image format
media-libs/libass:enca - Enables support for charset discovery and conversion.
media-libs/libass:harfbuzz - Enables OpenType shaping via media-libs/harfbuzz.
media-libs/libbluray:aacs - Add support for decryption of AACS
media-libs/libbluray:java - Add support for BD-J
media-libs/libbluray:utils - Install command-line utilities and examples
media-libs/libcanberra:alsa - Enables ALSA sound driver.
media-libs/libcanberra:gstreamer - Enables gstreamer sound driver. Not useful when alsa or pulseaudio is available.
media-libs/libcanberra:gtk - Enables building of gtk+ helper library, gtk+ runtime sound effects and the canberra-gtk-play utility. To enable the gtk+ sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
media-libs/libcanberra:gtk3 - Enables building of gtk+3 helper library, gtk+3 runtime sound effects and the canberra-gtk-play utility. To enable the gtk+3 sound effects add canberra-gtk-module to the colon separated list of modules in the GTK_MODULES environment variable.
media-libs/libcanberra:pulseaudio - Enables PulseAudio sound driver that should be able to support positional event sounds. This is the preferred choice for best sound events experience and picked by default if compiled in and possible to use at runtime.
media-libs/libcanberra:sound - Install x11-themes/sound-theme-freedesktop to get sounds on Gnome and Xfce.
media-libs/libcanberra:tdb - Enables Trivial Database support for caching purposes.
media-libs/libchamplain:introspection - Use dev-libs/gobject-introspection for introspection
media-libs/libchamplain:vala - Generate bindings for dev-lang/vala
media-libs/libextractor:archive - Enable archive support using app-arch/libarchive
media-libs/libextractor:gsf - Enable OLE2 (MS Office) plug-in support using gnome-base/libgsf
media-libs/libextractor:magic - Enable magic support using sys-apps/file
media-libs/libextractor:midi - Enable MIDI support through media-libs/libsmf
media-libs/libggi:vis - Enables sparc vis support for libggi
media-libs/libgnome-media-profiles:twolame - Allow encoding MPEG Audio Layer 2 (MP2) files using twolame
media-libs/libgphoto2:serial - Enable serial port support
media-libs/libgpod:gtk - Enable ArtworkDB support
media-libs/liblastfm:fingerprint - Build the lastfm-fingerprint library
media-libs/libmp4v2:utils - Install command-line utilities
media-libs/libomxil-bellagio:audioeffects - enable audio volume/mixer effects components
media-libs/libomxil-bellagio:clocksrc - enable clock component
media-libs/libomxil-bellagio:videoscheduler - enable xvideosink video scheduler
media-libs/libpng:apng - support unofficial APNG (Animated PNG) spec
media-libs/libpostproc:mmxext - Enable mmx2 support.
media-libs/libpostproc:pic - Force shared libraries to be built as PIC (this is slower).
media-libs/libquicktime:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec)
media-libs/libraw:demosaic - Enable support for external interpolation algorithms
media-libs/libsdl:audio - Control audio support (disable at your own risk)
media-libs/libsdl:joystick - Control joystick support (disable at your own risk)
media-libs/libsdl:ps3 - Build the PS3 video driver
media-libs/libsdl:tslib - Build with tslib support for touchscreen devices
media-libs/libsdl:video - Control video support (disable at your own risk)
media-libs/libsdl2:audio - Control audio support (disable at your own risk)
media-libs/libsdl2:fusionsound - use FusionSound audio driver
media-libs/libsdl2:gles - include OpenGL ES support
media-libs/libsdl2:haptic - Enable the haptic (force feedback) subsystem
media-libs/libsdl2:joystick - Control joystick support (disable at your own risk)
media-libs/libsdl2:tslib - Build with tslib support for touchscreen devices
media-libs/libsdl2:video - Control video support (disable at your own risk)
media-libs/libvpx:postproc - Enable additional post processing filters
media-libs/libvpx:sse3 - Enable optimization for SSE3 capable chips
media-libs/libvpx:sse4_1 - Enable optimization for SSE4_1 capable processors (Intel Core 2 Penryn and later chips)
media-libs/libvpx:ssse3 - faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
media-libs/libwebp:experimental - Build with -DWEBP_EXPERIMENTAL_FEATURES
media-libs/libwebp:swap-16bit-csp - Enable byte swapping for 16 bit colorspace
media-libs/lilv:dyn-manifest - Add LV2 Dynamic Manifest support. See http://lv2plug.in/ns/ext/dynmanifest/
media-libs/lv2:plugins - Enables examples plugins.
media-libs/mash:introspection - Use dev-libs/gobject-introspection for introspection
media-libs/mediastreamer:amr - Use of AMR Narrow Band codec plugin
media-libs/mediastreamer:filters - Enable compilation of filters
media-libs/mediastreamer:g726 - Support g726 codec
media-libs/mediastreamer:g729 - Use g726 codec plugin
media-libs/mediastreamer:ilbc - Use of iLBC (RFC3951) codec plugin
media-libs/mediastreamer:ntp-timestamp - Turn on NTP timestamping on received packet
media-libs/mediastreamer:opus - Enable opus codec support
media-libs/mediastreamer:ortp - Enable usage of net-libs/ortp
media-libs/mediastreamer:pcap - Enable usage of net-libs/libpcap
media-libs/mediastreamer:silk - Use silk (skype protocol) codec plugin
media-libs/mediastreamer:video - Enable video support
media-libs/memphis:introspection - Use dev-libs/gobject-introspection for introspection
media-libs/memphis:vala - Add support for Vala
media-libs/mesa:bindist - Disable patent-encumbered ARB_texture_float, EXT_texture_shared_exponent, and EXT_packed_float extensions.
media-libs/mesa:classic - Build drivers based on the classic architecture.
media-libs/mesa:dri3 - Enable DRI3 support.
media-libs/mesa:egl - Enable EGL support.
media-libs/mesa:g3dvl - Enable video decode acceleration support for Gallium3D.
media-libs/mesa:gallium - Build drivers based on Gallium3D, the new architecture for 3D graphics drivers.
media-libs/mesa:gbm - Enable the Graphics Buffer Manager for EGL on KMS.
media-libs/mesa:gles - Enable GLES (both v1 and v2) support.
media-libs/mesa:gles1 - Enable GLESv1 support.
media-libs/mesa:gles2 - Enable GLESv2 support.
media-libs/mesa:llvm - Enable LLVM backend for Gallium3D.
media-libs/mesa:llvm-shared-libs - Dynamically link Gallium3D drivers against LLVM.
media-libs/mesa:opencl - Enable the Clover Gallium OpenCL state tracker.
media-libs/mesa:openvg - Enable the OpenVG 2D acceleration API for Gallium3D.
media-libs/mesa:osmesa - Build the Mesa library for off-screen rendering.
media-libs/mesa:pax_kernel - Enable if the user plans to run the package under a pax enabled hardened kernel
media-libs/mesa:pic - disable optimized assembly code that is not PIC friendly
media-libs/mesa:r600-llvm-compiler - Build the LLVM based r600 shader compiler.
media-libs/mesa:shared-dricore - Enable sharing of common code for classic DRI drivers.
media-libs/mesa:shared-glapi - Enable sharing of common code for the OpenGL API.
media-libs/mesa:vdpau - Enable the VDPAU acceleration interface for the Gallium3D Video Layer.
media-libs/mesa:wayland - Enable support for dev-libs/wayland
media-libs/mesa:xa - Enable the XA (X Acceleration) API for Gallium3D.
media-libs/mesa:xorg - Enable the Xorg state tracker for Gallium3D. This is not required for OpenGL acceleration in X.
media-libs/mesa:xvmc - Enable the XvMC acceleration interface for the Gallium3D Video Layer.
media-libs/mlt:compressed-lumas - Compress the luma files in png.
media-libs/mlt:frei0r - Build the module for media-plugins/frei0r-plugins
media-libs/mlt:kdenlive - Build support for media-video/kdenlive
media-libs/mlt:lua - Build SWIG bindings for Lua
media-libs/mlt:melt - Build the melt commandline tool
media-libs/mlt:python - Build SWIG bindings for Python
media-libs/mlt:rtaudio - Builds rtaudio consumer for native audio support on multiple platforms.
media-libs/mlt:ruby - Build SWIG bindings for Ruby
media-libs/mlt:swfdec - Use media-libs/swfdec for reading .swf files (Macromedia Flash) instead of libavformat.
media-libs/netpbm:rle - Build converters for the RLE format (utah raster toolkit)
media-libs/openal:alstream - Build and install the FFmpeg based alstream example utility
media-libs/opencolorio:pdf - Install extra documentation in PDF format
media-libs/opencv:cuda - Enable NVIDIA Cuda computations support
media-libs/opencv:eigen - Enable usage of dev-cpp/eigen for computations
media-libs/opencv:ipp - Enable Intel Integrated Primitive support
media-libs/opencv:opencl - Add support for OpenCL
media-libs/opencv:testprograms - Build and install programs for testing OpenCV (performance)
media-libs/openimageio:colorio - Use media-gfx/opencolorio
media-libs/openimageio:opencv - Use media-libs/opencv
media-libs/openimageio:tbb - Use dev-cpp/tbb
media-libs/opus:custom-modes - Build with custom-modes.
media-libs/opusfile:fixed-point - Enable fixed-point arithmetic operations
media-libs/opusfile:float - Enable floating point arithmetic operations
media-libs/opusfile:http - Enable http connections
media-libs/phonon:designer - Install plugin for dev-qt/designer
media-libs/phonon:vlc - Install VLC Phonon backend
media-libs/phonon:zeitgeist - Add support for Zeitgeist event tracking system
media-libs/phonon-gstreamer:network - Enable network streaming support via libsoup
media-libs/portmidi:test-programs - Install various example programs
media-libs/quvi:json - Enable support for JSON output
media-libs/raptor:json - Enable support for JSON parsing
media-libs/sdif:ftruncate - Enables usage of ftruncate v. truncate
media-libs/sdl-image:webp - support loading WEBP images
media-libs/sdl-mixer:fluidsynth - Use media-sound/fluidsynth for MIDI support
media-libs/sdl-mixer:midi - basic support for MIDI files
media-libs/sdl-mixer:mod - basic support for MOD files
media-libs/sdl-mixer:playtools - Install playwave and playmus tools (useful for testing)
media-libs/sdl-mixer:smpeg - Use media-libs/smpeg for MP3 support
media-libs/sdl-mixer:wav - support WAVE files
media-libs/sdl-sound:physfs - Enable physfs support
media-libs/sdl2-image:webp - support loading WEBP images
media-libs/sdl2-mixer:fluidsynth - Use media-sound/fluidsynth for MIDI support
media-libs/sdl2-mixer:midi - basic support for MIDI files
media-libs/sdl2-mixer:mod - basic support for MOD files
media-libs/sdl2-mixer:playtools - Install playwave and playmus tools (useful for testing)
media-libs/sdl2-mixer:smpeg - Use media-libs/smpeg for MP3 support
media-libs/sdl2-mixer:tremor - enable OGG Vorbis music via libtremor
media-libs/sdl2-mixer:wav - support WAVE files
media-libs/sge:image - enable sdl-image support
media-libs/silgraphite:pango - Enables the pango-graphite pango module.
media-libs/spandsp:fixed-point - Enable fixed point support
media-libs/svgalib:kernel-helper - Build the helper kernel module
media-libs/swfdec:alsa - Use ALSA for audio output
media-libs/swfdec:doc - Build documentation
media-libs/swfdec:ffmpeg - Use media-plugins/gst-plugins-ffmpeg to enable Flash video support. Necessary if you want to use sites like youtube
media-libs/swfdec:gstreamer - Enable media-libs/gstreamer to support various media input formats. i.e. audio (mp3) and video (flv)
media-libs/swfdec:gtk - Enable GTK+ convenience library while is necessary for all GTK+ apps using swfdec (gnome-extra/swfdec-gnome and www-plugins/swfdec-mozilla)
media-libs/swfdec:pulseaudio - Use media-sound/pulseaudio for audio output
media-libs/taglib:asf - Provide support for Microsoft's 'advanced systems format' media container.
media-libs/tremor:low-accuracy - enable 32bit only multiply operations
media-libs/vips:fits - Enable support for the FITS image format through sci-libs/cfitsio
media-libs/waffle:egl - Enable EGL support
media-libs/waffle:gbm - Enable support for the Generic Buffer Manager (gbm)
media-libs/waffle:wayland - Enable Wayland support
media-libs/x264:10bit - Set output bit depth to 10, this may not be compatible with all decoders
media-libs/x264:interlaced - enable interlaced encoding support, this can decrease encoding speed by up to 2%
media-libs/x264:opencl - Add support for OpenCL.
media-libs/x264:pic - disable optimized assembly code that is not PIC friendly
media-libs/x265:10bit - Set output bit depth to 10.
media-libs/xine-lib:bluray - Enable playback of Blu-ray filesystems using media-libs/libbluray
media-libs/xine-lib:dxr3 - Enable support for DXR3 mpeg acceleration cards.
media-libs/xine-lib:flac - Build the media-libs/flac based FLAC demuxer and decoder. This flag is not needed for playing FLAC content, neither standalone nor in Ogg container (OggFLAC), but might have better support for exotic features like 24-bit samples or 96kHz sample rates.
media-libs/xine-lib:fusion - Enable support for the Fusion audio sub system
media-libs/xine-lib:gtk - Build the gdkpixbuf-based image decoder plugin.
media-libs/xine-lib:imagemagick - Build the ImageMagick-based image decoder plugin.
media-libs/xine-lib:mad - Build the media-libs/libmad based mp3 decoder. This mp3 decoder has superior support compared to the one coming from FFmpeg that is used as a fallback. If you experience any bad behaviour with mp3 files (skipping, distorted sound) make sure you enabled this USE flag.
media-libs/xine-lib:mmap - Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback.
media-libs/xine-lib:truetype - Use media-libs/freetype for font rendering and media-libs/fontconfig for font discovery. Enabling this USE flag will allow OSD (such as subtitles) to use more advanced font and to more easily select which font to use. The support for TrueType fonts in xine-lib is still experimental, and might not be as good looking as the bitmap fonts used with this USE flag disabled.
media-libs/xine-lib:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
media-libs/xine-lib:vdr - Build the VDR plugin
media-libs/xine-lib:vidix - Enable support for vidix video output.
media-libs/xine-lib:vis - Adds support for SIMD optimizations for UltraSPARC processors.
media-libs/xine-lib:xvmc - Enable support for XVideo Motion Compensation (accelerated mpeg playback).
media-libs/xvid:pic - disable optimized assembly code that is not PIC friendly
media-plugins/audacious-plugins:adplug - Build with AdPlug (Adlib sound card emulation) support
media-plugins/audacious-plugins:bs2b - Enable Bauer Bauer stereophonic-to-binaural headphone filter
media-plugins/audacious-plugins:cue - Support CUE sheets using the libcue library
media-plugins/audacious-plugins:fluidsynth - Support FluidSynth as MIDI synth backend
media-plugins/audacious-plugins:gtk3 - Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
media-plugins/audacious-plugins:midi - Build with amidi-plug (MIDI synth) support
media-plugins/audacious-plugins:scrobbler - Build with scrobbler/LastFM submission support
media-plugins/audacious-plugins:sid - Build with SID (Commodore 64 Audio) support
media-plugins/banshee-community-extensions:lastfmfingerprint - Enable support to ientify your music automatically, using the Last.fm online service.
media-plugins/banshee-community-extensions:lirc - Enable the remote control plugin (uses app-misc/lirc)
media-plugins/banshee-community-extensions:lyrics - Enable support for automatically fetching lyrics
media-plugins/banshee-community-extensions:mirage - Enable the Mirage plugin which automatically, and intelligently generates playlists for you
media-plugins/banshee-community-extensions:telepathy - Enables the Telepathy plugin which lets you to share and stream music with IM buddies
media-plugins/banshee-community-extensions:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
media-plugins/frei0r-plugins:facedetect - Enables building of facedetect plugin, which depends on media-libs/opencv
media-plugins/frei0r-plugins:scale0tilt - Enables building of scale0tilt and vectorscope plugins, which depend on media-libs/gavl
media-plugins/gkrellmpc:threads - Use separate thread to init connection (unsafe)
media-plugins/grilo-plugins:daap - Enable dmap support through net-libs/libdmapsharing
media-plugins/grilo-plugins:flickr - Enable Flickr support
media-plugins/grilo-plugins:freebox - Build support for viewing TV channels using Freebox
media-plugins/grilo-plugins:gnome-online-accounts - Enable net-libs/gnome-online-accounts support
media-plugins/grilo-plugins:pocket - Support for showing content from Pocket
media-plugins/grilo-plugins:tracker - Build support for content discovery using the app-misc/tracker indexer
media-plugins/grilo-plugins:vimeo - Build support for Vimeo content discovery using net-libs/libsoup and dev-libs/libgcrypt
media-plugins/grilo-plugins:youtube - Build support for YouTube content discovery using dev-libs/libgdata
media-plugins/gst-plugins-a52dec:orc - Use dev-lang/orc for runtime detection of CPU MMX/MMXEXT/3dNow! capabilities to pass down to a52dec library.
media-plugins/gst-plugins-gl:libvisual - Enable visualization effects via media-libs/libvisual
media-plugins/gst-plugins-meta:http - Enable http streaming via net-libs/libsoup
media-plugins/gst-plugins-meta:libvisual - Enable visualization effects via media-libs/libvisual
media-plugins/gst-plugins-meta:opus - Enable Opus audio codec support
media-plugins/gst-plugins-meta:vpx - Enables vp8 codec support using libvpx, required to play some HTML5 videos
media-plugins/kipi-plugins:expoblending - Build the expoblending plugin, which requires media-gfx/hugin
media-plugins/kipi-plugins:gpssync - Build the gpssync plugin, which requires media-lib/libkgeomap and thereby marble
media-plugins/kipi-plugins:linguas_ha - Hausa translation
media-plugins/kipi-plugins:linguas_mi - Maori translation
media-plugins/kipi-plugins:linguas_tt - ?? translation
media-plugins/kipi-plugins:linguas_ven - Venda translation
media-plugins/kipi-plugins:mediawiki - Build the mediawiki export plugin
media-plugins/kipi-plugins:mjpeg - Add mjpeg suppport
media-plugins/kipi-plugins:panorama - Pull in dependencies needed by panorama plugin
media-plugins/kipi-plugins:redeyes - Add redeyes removal suppport
media-plugins/kipi-plugins:videoslideshow - Build videoslideshow plugin
media-plugins/kipi-plugins:vkontakte - Build plugin for vkontakte.ru
media-plugins/mediastreamer-ilbc:20ms-frames - enable 20ms frame size (default is 30ms). Some VOIP providers such as Gizmo5 (aka Sipphone) require the codec to be compiled with the 30ms setting.
media-plugins/mythplugins:cdr - Allows MythMusic to burn CD-Rs
media-plugins/mythplugins:exif - Allows MythGallery to read EXIF data from photos
media-plugins/mythplugins:fftw - Adds visual effects to MythMusic when playing back music
media-plugins/mythplugins:mytharchive - Allows you to archive recorded content to CD or DVD
media-plugins/mythplugins:mythbrowser - Adds a web browser within MythTV
media-plugins/mythplugins:mythgallery - Adds a picture viewing gallery within MythTV
media-plugins/mythplugins:mythgame - Adds a frontend to various ROM emulators within MythTV
media-plugins/mythplugins:mythmusic - Adds the ability for MythTV to act as a music player
media-plugins/mythplugins:mythnetvision - Adds the ability to view netvision devices within MythTV
media-plugins/mythplugins:mythnews - Adds a news viewer within MythTV
media-plugins/mythplugins:mythweather - Adds weather information within MythTV
media-plugins/mythplugins:mythzoneminder - Adds support for zoneminder (requires a server with the appropriate mythtv daemon somewhere on the network).
media-plugins/mythplugins:raw - Allows MythGallery to view photos saved in RAW format
media-plugins/vdr-burn:dvdarchive - DMH DVD - Archive
media-plugins/vdr-epgsearch:tre - Add support for unlimited fuzzy searching with help of dev-libs/tre library
media-plugins/vdr-graphtft:graphtft-fe - Install external x11 remote frontend
media-plugins/vdr-graphtft:theme_avp - graphTFT Alien vs. Predato theme
media-plugins/vdr-graphtft:theme_deepblue - graphTFT default theme
media-plugins/vdr-graphtft:theme_deeppurple - graphTFT Deep Purple theme
media-plugins/vdr-graphtft:theme_poetter - graphTFT Poetter theme
media-plugins/vdr-graphtft:touchscreen - Enable Touchscreen support
media-plugins/vdr-music:graphtft - Enable support for media-plugins/vdr-graphtft
media-plugins/vdr-pvr350:yaepg - Enables full support for the output format of media-plugins/vdr-yaepg
media-plugins/vdr-streamdev:client - Compile the VDR plugin vdr-streamdev-client that acts like a dvb-budget card
media-plugins/vdr-streamdev:server - Compile the VDR plugin vdr-streamdev-server that allows remote systems to access the DVB cards used for the local VDR
media-plugins/vdr-text2skin:contrib - Install user contributed scripts
media-plugins/vdr-vdrmanager:stream - Add support for streaming Video to Android client
media-plugins/vdr-weatherng:dxr3 - enables lower osd color depth for dxr3 cards
media-plugins/vdr-xine:yaepg - Enables support for the plugin vdr-yaepg (showing scaled video besides OSD)
media-plugins/vdr-xineliboutput:bluray - Enable BluRay metadata support through media-libs/libbluray
media-plugins/vdr-xineliboutput:cec - Enable CEC support through dev-libs/libcec
media-plugins/vdr-xineliboutput:libextractor - Use media-libs/libextract to gather files' metadata in media-player
media-plugins/vdr-xineliboutput:vdr - Compile the vdr output plugin to use local or remote xine as output
media-plugins/vdr-xineliboutput:xine - Compile the xine input plugin for displaying vdr video and OSD
media-radio/ax25-tools:X - Enable some X based configuration tools.
media-radio/fldigi:hamlib - Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio in use
media-radio/tucnak2:ftdi - Enable support for FTDI USB chips
media-radio/tucnak2:hamlib - Enables support by the Hamlib amateur radio rig control library to get/set frequency and mode of the ham radio
media-radio/unixcw:ncurses - Enables building the curses based morse code tutor program 'cwcp'.
media-radio/xastir:festival - Enable text to speech synthesizer
media-radio/xastir:gdal - Support for some further map formats
media-radio/xastir:geotiff - Install geotiff support. Allows using USGS DRG topo maps or other types of geotiff mapes/images
media-radio/xastir:graphicsmagick - Use graphicsmagick instead imagemagick for rendering
media-sound/abcde:id3tag - Support ID3, ID3v2 tagging of audio files
media-sound/abcde:normalize - Add support for normalizing audio file volume levels
media-sound/abcde:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/abcm2ps:pango - Use the pango library to render fonts with non-latin characters
media-sound/alsa-utils:libsamplerate - install utils that use libsamplerate (e.g. alsaloop)
media-sound/alsa-utils:minimal - omit utils that rely on extra packages (e.g. alsaconf and alsa-info)
media-sound/alsa-utils:ncurses - install utils that use ncurses (e.g. alsamixer)
media-sound/alsaplayer:id3tag - Enables ID3 tagging with id3tag library
media-sound/amarok:embedded - Use libmysqld, MySQL embedded server library. Try disabling this if you encounter -PIC related in amarok, it will make amarok rely only on standalone MySQL server.
media-sound/amarok:lastfm - Enable Last.fm streaming services support through media-libs/liblastfm
media-sound/amarok:mp3tunes - Enable mp3tunes integration
media-sound/amarok:mtp - Enable support for libMTP (Plays4Sure) devices access through libmtp
media-sound/amarok:ofa - Use media-libs/libofa to compute MusicDNS acoustic fingerprints (used by MusicBrainz)
media-sound/amarok:utils - Build the utils - old media-sound/amarok-utils
media-sound/amsynth:dssi - Enable support for DSSI Soft Synth Interface
media-sound/aqualung:ifp - Enable support for iRiver iFP portable audio players
media-sound/aqualung:lua - Enable support for programmable title formatting with dev-lang/lua
media-sound/aqualung:mac - Enable support for decoding Monkey's Audio files
media-sound/aqualung:podcast - Enable podcast support
media-sound/aqualung:systray - Enable system tray support
media-sound/ardour:lv2 - Add support for Ladspa V2
media-sound/ario:audioscrobbler - Enable song tracking via last.fm
media-sound/ario:idle - Enable experimental support for MPD's idle command to reduce bandwidth and cpu usage, requires MPD 0.14
media-sound/asunder:mac - Support for creation of Monkey's Audio files (APE)
media-sound/asunder:opus - Support for creation of Opus files
media-sound/audacious:chardet - Try to handle non-UTF8 chinese/japanese/korean ID3 tags
media-sound/audacious:gtk3 - Link against version 3 of the GIMP Toolkit instead of version 2 (x11-libs/gtk+)
media-sound/audacity:id3tag - Enables ID3 tagging with id3tag library
media-sound/audacity:libsoxr - Uses media-libs/soxr as audio resampling library: Better quality than the included resampler and much faster than libsamplerate while keeping almost the same quality.
media-sound/audacity:midi - Enables MIDI support
media-sound/audacity:sbsms - Enables sbsms library support for pitch and tempo changing
media-sound/audacity:soundtouch - Enables soundtouch library support for pitch and tempo changing
media-sound/audacity:twolame - Enables twolame support (MPEG Audio Layer 2 encoder)
media-sound/audacity:vamp - Enables vamp plugins support (Audio analysing plugins)
media-sound/banshee:bpm - Build beats per minute detection extension
media-sound/banshee:cdda - Build with audio CD support
media-sound/banshee:daap - Build with Daap support
media-sound/banshee:karma - Build with karma support
media-sound/banshee:web - Enable support for plugins that access web-based services such as Amazon and wikipedia (requires net-libs/webkit-gtk)
media-sound/banshee:youtube - Enable the Youtube plugin
media-sound/beets:beatport - Enable support for beetport.com API
media-sound/beets:bpd - Enable support for media-sound/mpd server emulation
media-sound/beets:chroma - Enable support for acoustic fingerprinting plugin using (media-libs/chromaprint)
media-sound/beets:convert - Enable support for the convert plugin which makes it possible to transcode files
media-sound/beets:discogs - Enable support for the discogs API plugin
media-sound/beets:echonest_tempo - Enable support for writing the BPM of a track into its metadata
media-sound/beets:lastgenre - Enable support for importing music genres from last.fm tags
media-sound/beets:replaygain - Enable support for Replay Gain metadata calculation during import
media-sound/beets:web - Enable embedded webserver support through dev-python/flask
media-sound/cantata:replaygain - Enable ReplayGain support, for relative volume adjustments.
media-sound/clementine:box - Enable Box support
media-sound/clementine:dropbox - Enable Dropbox support
media-sound/clementine:googledrive - Enable Google Drive support
media-sound/clementine:lastfm - Use liblastfm for fetching song info, scrobbling and radio streams
media-sound/clementine:moodbar - Enable moodbar support
media-sound/clementine:projectm - Build with ProjectM visualization
media-sound/clementine:skydrive - Enable Skydrive support
media-sound/clementine:system-sqlite - Use the system-wide dev-db/sqlite installation
media-sound/clementine:ubuntu-one - Enable Ubuntu One support
media-sound/clementine:wiimote - Enable support for Wii remote
media-sound/cmus:cdio - use libcdio for CD support
media-sound/cmus:cue - enable CUE sheet parsing
media-sound/cmus:discid - enable reading the ID of the inserted CD
media-sound/cmus:pidgin - install support script for net-im/pidgin
media-sound/cmus:wma - add support for Windows Media Audio
media-sound/csound:beats - Build the beats score frontend
media-sound/csound:chua - Build the chua opcodes
media-sound/csound:csoundac - Build the CsoundAC extension module
media-sound/csound:double-precision - Use double-precision floating point for audio samples
media-sound/csound:dssi - Build the DSSI opcodes
media-sound/csound:fluidsynth - Build the fluidsynth opcodes
media-sound/csound:image - Build the image opcodes
media-sound/csound:keyboard - Build Virtual MIDI keyboard
media-sound/csound:linear - Build the linear algebra Opcodes
media-sound/csound:luajit - Use the lua just-in-time compiler dev-lang/luajit instead of dev-lang/lua
media-sound/csound:portmidi - Build the PortMIDI I/O module
media-sound/csound:samples - Install the HRTF datafiles for use with hrtfmove, hrtfmove2, hrtfstat, hrtfearly, and hrtfreverb
media-sound/csound:score - Build the alternative score parser
media-sound/csound:stk - Build the stk opcodes
media-sound/csound:tcl - Build the tcl interface and clients
media-sound/csound:utils - Build stand-alone executables for utilities that can also be used via `csound -U`
media-sound/darkice:aacplus - AAC+ encoding via media-libs/libaacplus
media-sound/darkice:opus - Enable Opus audio codec support
media-sound/darkice:twolame - Build with twolame support
media-sound/decibel-audio-player:gnome - Adds Gnome media keys support, so you can control Decibel using hotkeys.
media-sound/decibel-audio-player:gnome-keyring - Adds support for storing your Last.fm password using gnome-keyring.
media-sound/denemo:fluidsynth - Enable Fluidsynth MIDI software synthesis
media-sound/denemo:portmidi - Enable support for the portmidi backend
media-sound/dir2ogg:mac - Add support for decoding Monkey's Audio files
media-sound/dir2ogg:wma - Add support for wma files through mplayer
media-sound/ecasound:lv2 - Add support for Ladspa V2
media-sound/ecasound:oil - Use dev-libs/liboil for inner loop optimizations
media-sound/fapg:xspf - Enable support for saving XSPF playlists.
media-sound/flacon:mac - Add support for Monkey's Audio files
media-sound/flacon:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/flacon:tta - Add support for True Audio encoding
media-sound/freewheeling:fluidsynth - compile with support for fluidsynth
media-sound/frescobaldi:portmidi - Enable media-libs/portmidi support
media-sound/gejengel:audioscrobbler - Enable track submission on last.fm
media-sound/gimmix:cover - Enable cover art fetching
media-sound/gimmix:lyrics - Enable lyric fetching
media-sound/gmpc:unique - Enable single instance support using dev-libs/libunique
media-sound/gmpc:xspf - Enable support for reading and saving XSPF playlists
media-sound/google-musicmanager:log - Enables advanced logging through dev-libs/log4cxx
media-sound/gpodder:webkit - Enable the webkit rendering engine for HTML episode shownotes
media-sound/herrie:http - Enable http streaming
media-sound/herrie:xspf - Enable support for reading and saving XSPF playlists
media-sound/hydrogen:archive - Use libarchive instead of libtar
media-sound/jack-audio-connection-kit:coreaudio - Build the CoreAudio driver on Mac OS X systems
media-sound/jack-audio-connection-kit:cpudetection - Enables runtime cpudetection
media-sound/jack-audio-connection-kit:pam - Add basic realime configuration via sys-auth/realtime-base
media-sound/jalv:gtk2 - Adds support for GTK+2 in addition to GTK+3 controlled by the gtk useflag.
media-sound/jalv:gtkmm - Adds support for dev-cpp/gtkmm: C++ interface for GTK+2
media-sound/kid3:acoustid - Enable support for acoustic fingerprinting plugin using (media-libs/chromaprint)
media-sound/kwave:opus - Enable Opus audio codec support
media-sound/kwave:phonon - Enable playback via Phonon
media-sound/lame:mp3rtp - Build the mp3-to-RTP streaming utility. **UNSUPPORTED**
media-sound/lmms:fluidsynth - Enables Fluidsynth MIDI software synthesis plugin.
media-sound/lmms:stk - Enables STK Mallet plugin.
media-sound/lmms:vst - Enables the VeSTige plugin to run VST plugins through Wine.
media-sound/mangler:espeak - Text to speech engine
media-sound/mangler:g15 - Logitech g15 lcd support
media-sound/mangler:opus - Codec specialized for speech over the internet
media-sound/mixxx:shout - Enable broadcasting support via media-libs/libshout
media-sound/moc:cache - Enable tags caching support
media-sound/moc:magic - Use libmagic to determine mimetypes
media-sound/moc:sid - Build with SID (Commodore 64 Audio) support
media-sound/moc:tremor - Build vorbis support using an integer implementation of the vorbis library (media-libs/tremor)
media-sound/mp3blaster:sid - Build with SID (Commodore 64 Audio) support
media-sound/mp3splt-gtk:audacious - Include media-sound/audacious support
media-sound/mp3splt-gtk:gtk3 - Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
media-sound/mpd:adplug - Enable the AdPlug decoder plugin
media-sound/mpd:cdio - Use libcdio for ISO9660 parsing support
media-sound/mpd:curl - Support for web stream listening
media-sound/mpd:faad - Use external faad library for AAC decoding
media-sound/mpd:fifo - Support writing audio to a FIFO
media-sound/mpd:fluidsynth - Enables Fluidsynth MIDI software synthesis
media-sound/mpd:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-sound/mpd:id3tag - Support for ID3 tags
media-sound/mpd:inotify - Use the Linux kernel inotify subsystem to notice changes to mpd music library
media-sound/mpd:lame - Support for MP3 streaming via Icecast2
media-sound/mpd:lastfmradio - Support listening to last.fm radio stations
media-sound/mpd:libmpdclient - Enable support for remote mpd databases
media-sound/mpd:mpg123 - Enable support for mp3 decoding over media-sound/mpg123
media-sound/mpd:network - Enables network streaming support
media-sound/mpd:opus - Enable Opus codec support
media-sound/mpd:pipe - Support writing audio to a pipe
media-sound/mpd:recorder - Enables output plugin for recording radio streams
media-sound/mpd:sid - Build with SID (Commodore 64 Audio) support
media-sound/mpd:soundcloud - Build plugin to access soundcloud
media-sound/mpd:soup - Use net-libs/libsoup for HTTP streaming
media-sound/mpd:systemd - Enable support for systemd socket activation
media-sound/mpd:twolame - Support twolame MPEG-2 encoding
media-sound/mpd:wildmidi - Enable MIDI support via wildmidi
media-sound/mpd:zip - Support for ZIP files
media-sound/mpfc:wav - Enable wav audio codec support
media-sound/mpg123:3dnowext - Enable 3dnowext cpu instructions
media-sound/mpg123:int-quality - Use rounding instead of fast truncation for integer output, where possible
media-sound/mumble:g15 - Enable support for the Logitech G15 LCD (and compatible devices).
media-sound/mumble:speech - Enable text-to-speech support in Mumble.
media-sound/murmur:ice - Use dev-cpp/Ice to enable remote control capabilities.
media-sound/ncmpc:artist-screen - Enable artist screen
media-sound/ncmpc:chat-screen - Enable the chat screen
media-sound/ncmpc:colors - Enable color support
media-sound/ncmpc:help-screen - Enable the help screen
media-sound/ncmpc:key-screen - Enable key editor screen
media-sound/ncmpc:lyrics-screen - Enable lyrics screen
media-sound/ncmpc:mouse - Enable curses getmouse support
media-sound/ncmpc:search-screen - Enable search screen
media-sound/ncmpc:song-screen - Enable song viewer screen
media-sound/ncmpcpp:clock - Enable clock screen
media-sound/ncmpcpp:fftw - Build the visualizer plugin that pulls in sci-libs/fftw
media-sound/ncmpcpp:outputs - Enable outputs screen
media-sound/ncmpcpp:visualizer - Enable visualizer screen with sound wave/frequency spectrum modes
media-sound/pianobooster:fluidsynth - Enable Fluidsynth MIDI software synthesis
media-sound/picard:acoustid - Use media-libs/chromaprint for acoustic fingerprinting
media-sound/pms:regex - Enable regular expression searches using dev-libs/boost
media-sound/podcatcher:bittorrent - Enable support for bittorrent downloads
media-sound/pragha:glyr - Enable music metadata searchengine support using media-libs/glyr
media-sound/pragha:keybinder - Enable shortcut support using dev-libs/keybinder
media-sound/pragha:lastfm - Enable last.fm support using media-libs/libclastfm
media-sound/pragha:peas - Enable various plugins that will pull in dev-libs/libpeas as a dependency
media-sound/pragha:playlist - Enable enhanced playlist support using dev-libs/totem-pl-parser
media-sound/puddletag:acoustid - Use media-libs/chromaprint for acoustic fingerprinting
media-sound/puddletag:cover - Enables editing of FLAC cover art
media-sound/puddletag:musicbrainz - Enables support for musicbrainz, needs dev-python/python-musicbrainz
media-sound/puddletag:quodlibet - Enables support for editing media-sound/quodlibet databases
media-sound/pulseaudio:X - Build the X11 publish module to export PulseAudio information through X11 protocol for clients to make use. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
media-sound/pulseaudio:asyncns - Use libasyncns for asynchronous name resolution.
media-sound/pulseaudio:doc - Build the doxygen-described API documentation.
media-sound/pulseaudio:equalizer - Enable the equalizer module (requires sci-libs/fftw).
media-sound/pulseaudio:gdbm - Use sys-libs/gdbm to store PulseAudio databases. Recommended for desktop usage. This flag causes the whole package to be licensed under GPL-2 or later.
media-sound/pulseaudio:glib - Add support to dev-libs/glib-based mainloop for the libpulse client library, to allow using libpulse on glib-based programs.
media-sound/pulseaudio:gnome - Use GConf to store user preferences on streams and so on. Don't enable this flag if you want to use a system wide instance. If unsure, enable this flag.
media-sound/pulseaudio:oss - Enable OSS sink/source (output/input). Deprecated, upstream does not support this on systems where other sink/source systems are available (i.e.: Linux). The padsp wrapper is now always build if the system supports OSS at all.
media-sound/pulseaudio:realtime - Makes PulseAudio use RealtimeKit (sys-auth/rtkit) to get real-time priority while running.
media-sound/pulseaudio:ssl - Use dev-libs/openssl to provide support for RAOP (AirPort) streaming.
media-sound/pulseaudio:system-wide - Allow preparation and installation of the system-wide init script for PulseAudio. Since this support is only supported for embedded situations, do not enable without reading the upstream instructions at http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode .
media-sound/pulseaudio:systemd - Build with sys-apps/systemd support to replace standalone ConsoleKit.
media-sound/pulseaudio:webrtc-aec - Uses the webrtc.org AudioProcessing library for enhancing VoIP calls greatly in applications that support it by performing acoustic echo cancellation, analog gain control, noise suppression and other processing.
media-sound/pulseaudio:xen - Builds a special paravirtualized module for running in a Xen guest.
media-sound/qmmp:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-sound/qmmp:cover - Enable album cover support
media-sound/qmmp:crossfade - Enable crossfade effect when switching tracks
media-sound/qmmp:enca - Detects the character encoding automatically
media-sound/qmmp:game - Enable Game music support
media-sound/qmmp:kde - Use kde4 notifier system
media-sound/qmmp:lyrics - Fetch track lyrics from the web
media-sound/qmmp:midi - Enable midi support using wildmidi library
media-sound/qmmp:mpris - Enable MPRIS support
media-sound/qmmp:notifier - Enable qmmps' notifier system
media-sound/qmmp:opus - Enable the opus plugin
media-sound/qmmp:projectm - Enable projectm music visualization plugin
media-sound/qmmp:scrobbler - Enable audioscrobbler/last.fm support
media-sound/qmmp:stereo - Enable stereo effect
media-sound/qmmp:tray - Build tray icon
media-sound/qsampler:libgig - Enable libgig support for loading Gigasampler files and DLS (Downloadable Sounds) Level 1/2 files
media-sound/qtractor:dssi - Enable support for DSSI Soft Synth Interface
media-sound/qtractor:rubberband - Enable support for in-place audio clip pitch-shifting through the rubberband library
media-sound/qtscrobbler:cli - Build commandline client
media-sound/quark:gnome - Provides tray-icon and enables gconf support
media-sound/rezound:16bittmp - Use 16bit temporary files (default 32bit float), useful for slower computers
media-sound/rezound:soundtouch - compile with support for soundtouch
media-sound/rhythmbox:daap - Build the local network music sharing plugin which uses the DAAP protocol using net-libs/libdmapsharing
media-sound/rhythmbox:html - Use net-libs/webkit-gtk for detecting and displaying HTML podcast episode descriptions.
media-sound/rhythmbox:libsecret - Enable libsecret support to store login credentials
media-sound/rhythmbox:visualizer - Enable support for visualizations using media-plugins/gst-plugins-libvisual
media-sound/rhythmbox:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
media-sound/rubyripper:cdrdao - Add support for advanced toc scanning using app-cdr/cdrdao
media-sound/rubyripper:cli - Build command line interface rubyripper
media-sound/rubyripper:normalize - Add support for normalizing audio file volume levels
media-sound/rubyripper:wav - Add support for wavegain
media-sound/shntool:alac - Add support for Apple Lossless Audio Codec files
media-sound/shntool:mac - Add support for Monkey's Audio files
media-sound/snd:s7 - Enable the s7 extension language (a version of Scheme)
media-sound/sonata:lyrics - Support for lyrics fetching
media-sound/sonata:trayicon - Enable support for trayicon
media-sound/sonic-visualiser:id3tag - Enables ID3 tagging with id3tag library
media-sound/soundconverter:opus - Enable Opus audio codec support
media-sound/sox:amr - Enables Adaptive Multi-Rate Audio support
media-sound/sox:id3tag - Enables ID3 tagging with id3tag library
media-sound/sox:twolame - Enables twolame support (MPEG Audio Layer 2 encoder)
media-sound/split2flac:enca - Try to guess the charset using enca
media-sound/split2flac:flake - Add support for Flake, alternative FLAC encoder
media-sound/split2flac:mac - Add support for Monkey's Audio files
media-sound/split2flac:replaygain - Support for Replay Gain metadata, for relative volume adjustment
media-sound/spotify:pax_kernel - Triggers a paxmarking of the main Spotify binary
media-sound/squeezeslave:display - Enable a text-based display
media-sound/squeezeslave:tremor - Use a fixed-point version of the Ogg Vorbis decoder (media-libs/tremor)
media-sound/squeezeslave:wma - Enable support for streaming Windows Media Audio
media-sound/squeezeslave:zones - Pairs surround sound speakers into stereo zones (requires 5.1 setup or better)
media-sound/teamspeak-server-bin:tsdns - Make use of TeamSpeak DNS.
media-sound/tomahawk:telepathy - Enable support for the real-time communication framework telepathy
media-sound/tomahawk:twitter - Enable twitter support
media-sound/traverso:lv2 - Add support for Ladspa V2
media-sound/umurmur:polarssl - Use net-libs/polarssl instead of dev-libs/openssl
media-sound/vimpc:boost - Use boost instead of C++11 libraries
media-sound/vorbis-tools:kate - Adds support for Ogg Kate subtitles via libkate.
media-sound/vorbis-tools:ogg123 - Build ogg123 player, needs libao and curl
media-sound/xmms2:airplay - Support for airplay format
media-sound/xmms2:asf - Support for Monkey's Audio (APE) format with help of bundled libasf
media-sound/xmms2:gvfs - Transport for glibs virtual filesystem
media-sound/xmms2:ices - Icecast source output plugin
media-sound/xmms2:mac - Support for Monkey's Audio (APE) format with help of media-sound/mac
media-sound/xmms2:mlib-update - Enable building of xmms2-mlib-updater client
media-sound/xmms2:ofa - Support for Open Fingerprint Architecture (OFA)
media-sound/xmms2:phonehome - This client sends anonymous usage-statistics to the xmms2
media-sound/xmms2:server - Build xmms2 player daemon (otherwise only clients are built)
media-sound/xmms2:sid - Support for C64 SID
media-sound/xmms2:vocoder - Phase vocoder effect plugin
media-sound/xmms2:xml - Enable support for various XML based playlists and sources: RSS, XSPF
media-sound/xmp:audacious - Enable audacious support
media-sound/xnoise:lastfm - Enable support for lastfm cover art fetching and scrobbling
media-sound/xnoise:lyrics - Enable support for lyrics fetching
media-sound/xwax:alsa - Adds support for ALSA audio input/output.
media-sound/xwax:cdda - Sets runtime dependencies to support decoding audio from a compact disc.
media-sound/xwax:fallback - Sets runtime dependencies to support decoding "other" audio files.
media-sound/xwax:jack - Adds support for audio input/output via the JACK Audio Connection Kit.
media-sound/xwax:mp3 - Sets runtime dependencies to support decoding MP3 audio.
media-sound/xwax:oss - Adds support for OSS (open sound system) audio input/output.
media-tv/freevo:mixer - Enable support for adjusting volume via media-sound/aumix
media-tv/freevo:tv - Enable support for the tv guide plugin
media-tv/gentoo-vdr-scripts:nvram - Add support for using nvram-wakeup to set wakeup time in bios
media-tv/linuxtv-dvb-apps:alevt - Build videotext decoder
media-tv/me-tv:http - Installation of Web-frontend
media-tv/mythtv:alsa - Allows MythTV to directly output sound to ALSA devices, this is needed if you are using ALSA dmix or SPDIF. Note, you will have to physically type your device into the MythTV configuration since it will only give you /dev/dsp devices in the drop down.
media-tv/mythtv:altivec - Builds ffmpeg's codec libraries with altivec support.
media-tv/mythtv:autostart - Uses a custom autostart configuration gleaned from experience with MythTV since its early versions and discussed with other MythTV maintainers and users. Does not rely on KDE being installed like most methods do.
media-tv/mythtv:bluray - Pulls in libbluray for BluRay support.
media-tv/mythtv:cec - Allows you to control CEC enabled TVs via HDMI. Currently requires a USB based CEC -> HDMI injector between your TV and video card since no graphics drivers support CEC natively.
media-tv/mythtv:crystalhd - Allows you to utilize a Broadcom CrystalHD hardware based video decoder to improve the performance of video decode.
media-tv/mythtv:debug - Instructs Qt to use the 'debug' target instead of 'release' target. If your MythTV is crashing or you need a backtrace, you need to compile it with this option otherwise the debugging data is useless.
media-tv/mythtv:dvb - Enables support for Linux DVB cards. These include all cards that work with digital signals such as ATSC, DVB-T, DVB-C, and DVB-S, QAM-64, and QAM-256.
media-tv/mythtv:egl - Support EGL video output.
media-tv/mythtv:fftw - Support visualizations via sci-libs/fftw
media-tv/mythtv:hls - HTTP Live Streaming support
media-tv/mythtv:ieee1394 - Allows MythTV to communicate and use Firewire enabled Cable boxes. These are typically found in the United States, where such support is required by law. This will also install Firewire test programs and external channel changers if the internal changer does not work.
media-tv/mythtv:jack - Allows MythTV to use JACK as your sound output device. You will have to manually configure the path to your JACK settings.
media-tv/mythtv:lcd - Tells MythTV that you have an instance of app-misc/lcdproc configured on your machine and it should output information such as current time, show name, episode name, etc to that LCD.
media-tv/mythtv:libass - SRT/SSA/ASS (SubRip / SubStation Alpha) subtitle support
media-tv/mythtv:lirc - Adds LIRC support directly to MythTV allowing for built in control via a LIRC device.
media-tv/mythtv:perl - Builds the perl bindings for MythTV. Allows you to write scripts in Perl to control your MythTV setup or communicate with it.
media-tv/mythtv:raop - Remote Audio Output Protocol (aka AirTunes/AirPlay)
media-tv/mythtv:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
media-tv/mythtv:xmltv - Pulls in the media-tv/xmltv TV listing grabbers for users not using Schedules Direct.
media-tv/tvbrowser:themes - Install extra theme packs
media-tv/tvheadend:xmltv - Use media-tv/xmltv
media-tv/v4l-dvb-saa716x:firmware - Install firmware
media-tv/xawtv:xext - Enable use of XFree extensions (DGA,VidMode,DPMS)
media-tv/xawtv:zvbi - Enable VBI Decoding Library for Zapping
media-tv/xbmc:airplay - enable AirPlay support
media-tv/xbmc:bluray - Enable playback of Blu-ray filesystems
media-tv/xbmc:cec - Enable support for HDMI-CEC devices via libcec
media-tv/xbmc:fishbmc - Enable fishBMC visualization plugin
media-tv/xbmc:gles - Enable support for GLES
media-tv/xbmc:goom - Enable GOOM visualization plugin
media-tv/xbmc:midi - Support MIDI files
media-tv/xbmc:nfs - Enable NFS client support
media-tv/xbmc:projectm - Enable projectM visualization plugin
media-tv/xbmc:pvr - Enable MythTV support
media-tv/xbmc:rsxs - Enable really slick X screensavers
media-tv/xbmc:rtmp - Enable Real Time Messaging Protocol using librtmp
media-tv/xbmc:sftp - Support browsing files over SFTP
media-tv/xbmc:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
media-tv/xbmc:webserver - Enable internal webserver
media-tv/xbmc:xrandr - Support X randr extension
media-tv/xmltv:ar - Argentina tv listing grabber
media-tv/xmltv:be - Belgium and Luxemburg tv listing grabber
media-tv/xmltv:brnet - Brazil cable tv listing grabber
media-tv/xmltv:ch - Switzerland bluewin tv listing grabber
media-tv/xmltv:dk - Denmark tv listing grabber
media-tv/xmltv:dtvla - Latin America digital tv listing grabber
media-tv/xmltv:ee - Estonia tv listing grabber
media-tv/xmltv:es - Spain tv listing grabber
media-tv/xmltv:es_laguiatv - Spain alternative grabber
media-tv/xmltv:es_miguiatv - Spain alternative grabber
media-tv/xmltv:eu_epg - EPG grabber for some European countries.
media-tv/xmltv:fi - Finland tv listing grabber
media-tv/xmltv:fr - France tv listing grabber
media-tv/xmltv:hr - Croatia tv listing grabber
media-tv/xmltv:huro - Hungarian tv listing grabber
media-tv/xmltv:il - Israel tv listing grabber
media-tv/xmltv:in - India tv listing grabber
media-tv/xmltv:is - Iceland tv listing grabber
media-tv/xmltv:it - Italy tv listing grabber
media-tv/xmltv:jp - Japan tv listing grabber
media-tv/xmltv:na_dd - North America tv listing grabber
media-tv/xmltv:na_dtv - North America Direct TV grabber
media-tv/xmltv:na_icons - option for na_dd to download icons
media-tv/xmltv:nc - Caledonie Island tv listing grabber
media-tv/xmltv:nl - Netherlands tv listing grabber
media-tv/xmltv:nl_wolf - Netherlands alternative tv listing grabber
media-tv/xmltv:no - Norway tv listing grabber
media-tv/xmltv:no_gf - Norway Gfeed tv listing grabber
media-tv/xmltv:pt - Portugal tv listing grabber
media-tv/xmltv:re - Reunion Island (France) tv listing grabber
media-tv/xmltv:se_swedb - Sweden tv listing grabber
media-tv/xmltv:tv_check - enable GUI checking
media-tv/xmltv:tv_combiner - enable grabbers combiner
media-tv/xmltv:tv_pick_cgi - enable CGI support
media-tv/xmltv:uk_bleb - Britain tv listing grabber
media-tv/xmltv:uk_rt - Britain alternative tv listing grabber
media-tv/xmltv:za - South Africa tv listing grabber
media-video/aravis:X - Build the GTK+-based video viewer for aravis. This requires GStreamer and a few plugins but technically not the GST plugin for aravis.
media-video/aravis:gstreamer - Build the GStreamer plugin for aravis, but not the video viewer.
media-video/arista:faac - Use external faac library for AAC encoding
media-video/arista:nautilus - Add an entry in the Nautilus context menu to transcode media files for a specified device.
media-video/avidemux:aften - Enable A/52 (AC-3) audio encoder support.
media-video/avidemux:amr - Enable Adaptive Multi-Rate format support via media-libs/opencore-amr.
media-video/avidemux:vaapi - Enable VAAPI (Video Acceleration API) for hardware decoding.
media-video/avidemux:vpx - Enable VP8 codec support via media-libs/libvpx.
media-video/bombono-dvd:gnome - Use GVFS for desktop integration
media-video/chaplin:transcode - Enable DVD ripping and transcoding
media-video/cheese:sendto - Build the gnome-extra/nautilus-sendto plugin
media-video/clive:clipboard - Support reading from X clipboard
media-video/clive:pager - Support pager!?
media-video/clive:password - Support password controlled sites
media-video/devede:mencoder - Prefer MPlayer mencoder over Libav avconv or FFmpeg ffmpeg for encoding.
media-video/dv2sub:kino - install kino plugin
media-video/dvd-slideshow:themes - Install theme pack
media-video/dvdauthor:graphicsmagick - Use media-gfx/graphicsmagick instead of media-gfx/imagemagick
media-video/dvdrip:fping - Enables fping support for cluster rendering
media-video/dvdrip:subtitles - Enables support for subtitle ripping
media-video/dvdstyler:deprecated - Use the old libgnomeui-2 library
media-video/ffdiaporama:openclipart - Support openslipart database
media-video/ffdiaporama:texturemate - Install extra backgrounds
media-video/ffmpeg:3dnowext - Enable manually-optimised routines using the AMD 3DNow!Ex SIMD instruction set, present in modern AMD CPUs. (Check for 3dnowext in /proc/cpuinfo to know whether your CPU supports it).
media-video/ffmpeg:aacplus - AAC+ encoding via media-libs/libaacplus.
media-video/ffmpeg:amr - Enables Adaptive Multi-Rate Audio support
media-video/ffmpeg:amrenc - Enables Adaptive Multi-Rate Audio encoding support with media-libs/vo-amrwbenc.
media-video/ffmpeg:armv5te - Enables optimizations for armv5te processors.
media-video/ffmpeg:armv6 - Enables optimizations for armv6 processors.
media-video/ffmpeg:armv6t2 - Enables optimizations for armv6t2 processors.
media-video/ffmpeg:armvfp - Enables VFP optimizations for ARM processors.
media-video/ffmpeg:avx - Adds support for Advanced Vector Extensions instructions (Intel Sandy Bridge, AMD Bulldozer and later chips)
media-video/ffmpeg:avx2 - Adds support for Advanced Vector Extensions 2 instructions (Intel Haswell and later chips)
media-video/ffmpeg:bindist - Enforces license compatibility constraints via REQUIRED_USE.
media-video/ffmpeg:bluray - Enable playback of Blu-ray filesystems
media-video/ffmpeg:cdio - Enables audio CD grabbing with dev-libs/libcdio.
media-video/ffmpeg:celt - Adds Xiph CELT audio decoding support via media-libs/celt
media-video/ffmpeg:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
media-video/ffmpeg:dirac - Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac.
media-video/ffmpeg:faac - Use external faac library for AAC encoding
media-video/ffmpeg:fdk - Use external fdk-aac library for AAC encoding
media-video/ffmpeg:flite - Adds a text-to-speech filter based on app-accessibility/flite.
media-video/ffmpeg:fma3 - Enables FMA3 optimizations: AMD processors starting with Piledriver architecture and Intel Haswell based processors or later.
media-video/ffmpeg:fma4 - Enables FMA4 optimizations: AMD processors starting with Bulldozer architecture.
media-video/ffmpeg:frei0r - Enable frei0r wrapping in libavfilter
media-video/ffmpeg:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-video/ffmpeg:hardcoded-tables - Use pre-calculated tables rather than calculating them on the fly.
media-video/ffmpeg:iec61883 - Support for FireWire DV/HDV input device using media-libs/libiec61883.
media-video/ffmpeg:libsoxr - Enables audio resampling through media-libs/soxr.
media-video/ffmpeg:libv4l - Uses media-libs/libv4l for video4linux instead of direct calls. Adds support for more devices via the userspace library.
media-video/ffmpeg:mips32r2 - Enables MIPS32R2 optimizations.
media-video/ffmpeg:mipsdspr1 - Enables MIPS DSP ASE R1 optimizations.
media-video/ffmpeg:mipsdspr2 - Enables MIPS DSP ASE R2 optimizations.
media-video/ffmpeg:mipsfpu - Enables floating point MIPS optimizations.
media-video/ffmpeg:mmxext - Enables mmx2 support
media-video/ffmpeg:network - Enables network streaming support
media-video/ffmpeg:openssl - Enables dev-libs/openssl support. Adds support for encrypted network protocols (TLS/HTTPS).
media-video/ffmpeg:opus - Adds (decoding) support for the Opus codec via media-libs/opus.
media-video/ffmpeg:pic - Force shared libraries to be built as PIC (this is slower)
media-video/ffmpeg:quvi - Adds support for playing media from Internet services using the quvi project.
media-video/ffmpeg:rtmp - Enable Real Time Messaging Protocol using librtmp
media-video/ffmpeg:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/ffmpeg:sse4 - Enables SSE4 optimizations: Intel Core microarchitecture and AMD K10 or later.
media-video/ffmpeg:sse4_2 - Enables SSE4.2 optimizations: Nehalem-based Intel Core i7 or later.
media-video/ffmpeg:ssh - Enable SSH/sftp support via net-libs/libssh.
media-video/ffmpeg:ssse3 - Faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
media-video/ffmpeg:twolame - Enables MP2 encoding via media-sound/twolame as an alternative to the internal encoder.
media-video/ffmpeg:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
media-video/ffmpeg:vis - Adds support for SIMD optimizations for UltraSPARC processors.
media-video/ffmpeg:vpx - Enables vp8 codec support using libvpx: Decoding vp8 does not require this to be enabled but libvpx can also be used for decoding; encoding vp8 requires this useflag to be enabled though.
media-video/ffmpeg:webp - Enables WebP encoding with media-libs/libwebp.
media-video/ffmpeg:x265 - Enables HEVC encoding with media-libs/x265.
media-video/ffmpeg:zvbi - Enables media-libs/zvbi based teletext decoder.
media-video/ffmpeg2theora:kate - Adds support for Ogg Kate subtitles via libkate.
media-video/gnome-mplayer:dconf - Enable support for gnome-base/dconf
media-video/gnome-mplayer:gda - Enable support for gnome-extra/libgda
media-video/google2srt:html - Install HTML documentation
media-video/gxine:gnome-screensaver - Enable dbus support to communicate with gnome-extra/gnome-screensaver
media-video/h264enc:ogm - Support for OGM container format
media-video/handbrake:fdk - Support for encoding AAC using media-libs/fdk-aac.
media-video/handbrake:ffmpeg - Use FFmpeg from media-video/ffmpeg to decode MPEG-2 instead of media-plugins/gst-plugins-mpeg2dec.
media-video/handbrake:gstreamer - Support for the streaming media framework from media-libs/gstreamer.
media-video/handbrake:gtk - Support for Gimp ToolKit + from x11-libs/gtk+, requirement for a GUI-based HandBrake.
media-video/hwdecode-demos:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
media-video/kino:gpac - Enable GPAC support when exporting to 3GPP format
media-video/kmplayer:npp - Compile the npp backend that plays xembed style browser plugins.
media-video/libav:3dnowext - Enable manually-optimised routines using the AMD 3DNow!Ex SIMD instruction set, present in modern AMD CPUs. (Check for 3dnowext in /proc/cpuinfo to know whether your CPU supports it).
media-video/libav:aac - Use external vo-aacenc library for AAC encoding
media-video/libav:amr - Enable Adaptive Multi-Rate Audio support
media-video/libav:avx - Adds support for Advanced Vector Extensions instructions (Intel Sandy Bridge, AMD Bulldozer and later chips)
media-video/libav:bindist - Build binary redistributable version without including nonfree decoders and encoders.
media-video/libav:cdio - Enable audio CD grabbing with dev-libs/libcdio.
media-video/libav:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs).
media-video/libav:dirac - Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac.
media-video/libav:faac - Use external faac library for AAC encoding
media-video/libav:fdk - Use external fdk-aac library for AAC encoding
media-video/libav:frei0r - Enable frei0r wrapping in libavfilter
media-video/libav:gpl - Build all GPL licensed code. Without this flag set the package is build under LGPL license.
media-video/libav:hardcoded-tables - Use pre-calculated tables rather than calculating them on the fly.
media-video/libav:mmxext - Enable mmx2 support.
media-video/libav:network - Enable network streaming support.
media-video/libav:openssl - Prefer dev-libs/openssl over net-libs/gnutls to provide SSL/TLS support (notice: the resulting binaries are unredistributable).
media-video/libav:opus - Use the external opus library for encoding and decoding.
media-video/libav:pic - Force shared libraries to be built as PIC (this is slower).
media-video/libav:pulseaudio - Enable pulseaudio input support.
media-video/libav:qt-faststart - Build and install qt-faststart application.
media-video/libav:rtmp - Enable Real Time Messaging Protocol using librtmp instead the native implementation.
media-video/libav:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/libav:ssl - Enable SSL/TLS support using dev-libs/openssl or dev-libs/gnutls.
media-video/libav:ssse3 - faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips).
media-video/libav:tools - Build and install small tools like aviocat, cws2fws, graph2dot, ismindex, qt-faststart.
media-video/libav:vaapi - Enable VAAPI (Video Acceleration API) for hardware decoding.
media-video/libav:vis - Adds support for SIMD optimizations for UltraSPARC processors.
media-video/libav:vpx - Enable vp8 encoding support using libvpx.
media-video/lives:libvisual - Enable libvisual support
media-video/minitube:download - Enable support for downloading YouTube videos
media-video/mjpegtools:sdlgfx - Enables y4mhist to display a graphical histogram
media-video/mjpg-streamer:input_control - Plugin giving ability to control camera movement (only specific cameras)
media-video/mjpg-streamer:input_file - Plugin that watches given directory and send it's content
media-video/mjpg-streamer:input_testpicture - Plugin for sending compiled in, test pictures
media-video/mjpg-streamer:input_uvc - Plugin that sends video stream from UVC compatible camera
media-video/mjpg-streamer:output_autofocus - Auto focusing plugin
media-video/mjpg-streamer:output_file - Plugin that saves received content under given location
media-video/mjpg-streamer:output_http - Small HTTP server plugin which sends WWW directory content and streams image content
media-video/mjpg-streamer:output_rtsp - Plugin which provides a mechanism to take snapshots with a trigger from a UDP packet
media-video/mjpg-streamer:output_udp - Plugin receiving content over UDP and storing to a directory
media-video/mjpg-streamer:v4l - Uses media-libs/libv4l function mapping for input_uvc plugin
media-video/mjpg-streamer:www - Installs WWW content
media-video/motiontrack:multiprocess - Enables multi-process support (SMP/cluster) for motiontrack programs
media-video/mplayer:3dnowext - Enable 3dnowext cpu instructions
media-video/mplayer:bindist - Enforces license compatibility constraints via REQUIRED_USE.
media-video/mplayer:bl - Blinkenlights video output
media-video/mplayer:bluray - Enable playback of Blu-ray filesystems
media-video/mplayer:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-video/mplayer:cdio - Use libcdio for CD support (instead of cdparanoia)
media-video/mplayer:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
media-video/mplayer:dvdnav - Use forked libdvdnav, navigate menus in GUIs
media-video/mplayer:dxr3 - Enable DXR3/H+ video output
media-video/mplayer:enca - Enables support for charset discovery and conversion
media-video/mplayer:faac - Use external faac library for AAC encoding
media-video/mplayer:faad - Use external faad library for AAC decoding
media-video/mplayer:libmpeg2 - Build support for mpeg2 over media-libs/libmpeg2 rather than using ffmpeg.
media-video/mplayer:live - Enables live.com streaming media support
media-video/mplayer:md5sum - Enables md5sum video output
media-video/mplayer:mmxext - Enables mmx2 support
media-video/mplayer:mng - MNG input support
media-video/mplayer:network - Enables network streaming support
media-video/mplayer:nut - Enables support for the NUT container format
media-video/mplayer:osdmenu - Enables support for on-screen display (OSD) menus
media-video/mplayer:pnm - Add PNM video output option, to create PPM/PGM/PGMYUV images
media-video/mplayer:pvr - Enable Video4Linux2 MPEG PVR
media-video/mplayer:radio - Enable V4L2 radio interface and support
media-video/mplayer:rar - Enable Unique RAR File Library
media-video/mplayer:rtc - Enables usage of the linux real time clock. The alternative is software emulation of rtc
media-video/mplayer:rtmp - Enables RTMPDump Streaming Media support
media-video/mplayer:shm - Enable support for shm
media-video/mplayer:ssse3 - faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
media-video/mplayer:tga - Enables Targa video output
media-video/mplayer:toolame - Enable toolame MPEG-2 encoding
media-video/mplayer:tremor - Enable internal support for Vorbis
media-video/mplayer:twolame - Enable twolame MPEG-2 encoding
media-video/mplayer:vidix - Support for vidix video output
media-video/mplayer:xanim - Enables support for xanim based codecs
media-video/mplayer:xvmc - Enables X-Video Motion Compensation support
media-video/mplayer:zoran - Enables ZR360[56]7/ZR36060 video output
media-video/mplayer2:3dnowext - Enable 3dnowext cpu instructions
media-video/mplayer2:bluray - Enable playback of Blu-ray filesystems
media-video/mplayer2:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-video/mplayer2:cdio - Use libcdio for CD support (instead of cdparanoia)
media-video/mplayer2:cpudetection - Enables runtime CPU detection (useful for bindist, compatibility on other CPUs)
media-video/mplayer2:dvdnav - Use forked libdvdnav, navigate menus in GUIs
media-video/mplayer2:enca - Enables support for charset discovery and conversion
media-video/mplayer2:faad - Use external faad library for AAC decoding
media-video/mplayer2:md5sum - Enables md5sum video output
media-video/mplayer2:mmxext - Enables mmx2 support
media-video/mplayer2:mng - MNG input support
media-video/mplayer2:mp3 - Enable support for mp3 decoding over media-sound/mpg123 instead of relying on ffmpeg support.
media-video/mplayer2:network - Enables network streaming support
media-video/mplayer2:nut - Enables support for the NUT container format
media-video/mplayer2:pnm - Add PNM video output option, to create PPM/PGM/PGMYUV images
media-video/mplayer2:postproc - Enable image post-processing via libpostproc
media-video/mplayer2:pvr - Enable Video4Linux2 MPEG PVR
media-video/mplayer2:quvi - Enable support for streaming sites using media-libs/libquvi
media-video/mplayer2:radio - Enable V4L2 radio interface and support
media-video/mplayer2:rar - Enable Unique RAR File Library
media-video/mplayer2:rtc - Enables usage of the linux real time clock. The alternative is software emulation of rtc
media-video/mplayer2:shm - Enable support for shm
media-video/mplayer2:ssse3 - Faster floating point optimization for SSSE3 capable chips (Intel Core 2 and later chips)
media-video/mplayer2:symlink - Copy all binaries and configuration into locations occupied by media-video/mplayer and thus act like drop-in replacement.
media-video/mplayer2:tga - Enables Targa video output
media-video/mplayer2:xanim - Enables support for xanim based codecs
media-video/mplayer2:yuv4mpeg - Enables yuv4mpeg video output
media-video/mpv:bluray - Enable playback of Blu-ray filesystems
media-video/mpv:bs2b - Enable Bauer stereophonic-to-binaural headphone filter
media-video/mpv:cdio - Use libcdio for CD support (instead of cdparanoia)
media-video/mpv:doc-pdf - Build documentation in pdf format
media-video/mpv:dvdnav - Enable support for DVD navigation using media-libs/dvdnav.
media-video/mpv:enca - Enables support for charset discovery and conversion using app-i18n/enca
media-video/mpv:libguess - Enables support for charset discovery and conversion using app-i18n/libguess
media-video/mpv:luajit - Use dev-lang/luajit instead of dev-lang/lua
media-video/mpv:mpg123 - Enable support for mp3 decoding over media-sound/mpg123 instead of relying on ffmpeg support.
media-video/mpv:postproc - Enable image post-processing via libpostproc
media-video/mpv:pvr - Enable Video4Linux2 MPEG PVR
media-video/mpv:quvi - Enable support for streaming sites using media-libs/libquvi
media-video/mpv:radio - Enable V4L2 radio interface and support
media-video/mpv:shm - Enable support for shm
media-video/mpv:vaapi - Enable VAAPI (Video Acceleration API) for hardware decoding
media-video/mpv:vf-dlopen - Install additional video filters for using with -vf dlopen
media-video/ogmrip:ogm - Support for OGM container format
media-video/ogmrip:srt - Support for SRT subtitle format
media-video/pgcedit:video - Add support for video preview
media-video/qgifer:imagemagick - Use imagemagick for image operations
media-video/rtmpdump:gnutls - Use GnuTLS library instead of the default OpenSSL
media-video/rtmpdump:polarssl - Use PolarSSL library instead of the default OpenSSL
media-video/smplayer2:download-subs - Enable subtitle downloader (requires QuaZip)
media-video/totem:bluetooth - Enable support for user-presence detection via the user's bluetooth handset using net-wireless/bluez
media-video/totem:flash - Install browser plugin for playing embedded Adobe Flash videos. Warning: breaks non-video Flash objects on many websites.
media-video/totem:grilo - Use media-libs/grilo to browse media content from various sources
media-video/totem:iplayer - Enable BBC player support
media-video/totem:lirc - Enable support for controlling Totem with a remote control using app-misc/lirc
media-video/totem:nautilus - Enable the nautilus extension
media-video/totem:python - Build support for dev-lang/python plugins
media-video/totem:tracker - Enable support for searching media files using the indexer app-misc/tracker
media-video/totem:youtube - Enable youtube plugin
media-video/totem:zeitgeist - Build the plugin to inject events to gnome-extra/zeitgeist
media-video/transcode:mjpeg - Enables mjpegtools support
media-video/transcode:nuv - NuppelVideo container format demuxing
media-video/transcode:pic - disable optimized assembly code that is not PIC friendly
media-video/transcode:postproc - Build with ffmpeg libpostproc support
media-video/tsmuxer:qt4 - Installs tsMuxerGUI (needs Qt4)
media-video/ushare:dlna - Add DLNA (media-libs/libdlna) support
media-video/vdr:alternatechannel - Use alternate channel on record
media-video/vdr:analogtv - Add support for the analogtv plugin
media-video/vdr:atsc - Support for NorthAmerican Broadcast ( rudimentary )
media-video/vdr:bidi - fribid support, for languages, written from right to left
media-video/vdr:cmdreccmdi18n - loads translated commands and reccommands files if existing
media-video/vdr:cmdsubmenu - Allows the creation of submenus in the commands menu
media-video/vdr:cutterlimit - Limit IO bandwith used for cutting
media-video/vdr:cutterqueue - Adds a queue of recordings to be cutted
media-video/vdr:cuttime - Adjust starttime of cutted recording by length of cut out parts
media-video/vdr:ddepgentry - remove duplicate EPG entries
media-video/vdr:deltimeshiftrec - Auto delete timeshift recordings
media-video/vdr:dolbyinrec - add a dedicated switch to control recording of dolby digital
media-video/vdr:dvbplayer - Use some special mpeg-repacker features. Most usable for old recordings or software output devices.
media-video/vdr:dvbsetup - Setup for AC3 transfer, disable primary tuner
media-video/vdr:dvdarchive - DMH DVD - Archiv ( used by vdr-burn-0.1.0_* )
media-video/vdr:dvdchapjump - Jump on capitels on DMH DVD - Archiv
media-video/vdr:dvlfriendlyfnames - filter file names on recording
media-video/vdr:dvlrecscriptaddon - enhancement for record-script
media-video/vdr:dvlvidprefer - controls video-dir choice on recording
media-video/vdr:dxr3 - Enable tweaks to improve vdr behaviour on dxr3-cards
media-video/vdr:em84xx - Add support for em84xx plugin
media-video/vdr:graphtft - support for grapftft plugin up from vdr-graphtft-0.1.7
media-video/vdr:hardlinkcutter - Speed up cutting by hardlinking unchanged files
media-video/vdr:html - Install HTML documentation
media-video/vdr:iptv - Enables channel parameters for vdr-iptv and other input plugins
media-video/vdr:jumpingseconds - skip seconds in played records
media-video/vdr:jumpplay - Enables automatic jumping over cut marks while watching a recording
media-video/vdr:liemikuutio - Formerly known as AIO (all-in-one) patch, adds some nice must haves, plus changes from extensions patch
media-video/vdr:lircsettings - Allows to change lirc settings delay, freq and timeout values in OSD
media-video/vdr:livebuffer - does timeshifting/background recording all the time, allows to rewind live TV
media-video/vdr:lnbshare - Enables support for two or more dvb cards sharing the same cable to the lnb
media-video/vdr:mainmenuhooks - Allows to replace main menu entries by some special plugins (like epgsearch, extrecmenu, ...)
media-video/vdr:menuorg - Enables support for the menuorg-plugin
media-video/vdr:naludump - Removes NALU fill data from h.264-Streams of TS files
media-video/vdr:noepg - Adds code to selectively disable epg-reception for specific channels
media-video/vdr:osdmaxitems - Support for text2skin
media-video/vdr:parentalrating - Support Parental Rating
media-video/vdr:permashift - permanent timeshift by recording live TV on hard disk, need plugin vdr-permashift
media-video/vdr:pinplugin - Support for pin plugin
media-video/vdr:rotor - Enable support for plugin vdr-rotor for dish-positioner.
media-video/vdr:settime - set system time per script instead of via syscal
media-video/vdr:setup - Enable support for the plugin vdr-setup
media-video/vdr:softosd - Soft OSD fading with FF-Cards
media-video/vdr:sortrecords - allows to change sort order of recordings
media-video/vdr:sourcecaps - Adds the ability to define capabilities of dvb-cards (e.g. card1 can receive Sat @28.2E)
media-video/vdr:syncearly - start live display as soon as possible, not waiting for sync of audio and video
media-video/vdr:timercmd - Adds submenu for user defined commands in timer menu
media-video/vdr:timerinfo - Show with chars +/- if space on HD will suffice for a timer
media-video/vdr:ttxtsubs - support for ttxtsubs plugin
media-video/vdr:validinput - Signal if it is possible to go left/right in lists with chars < >
media-video/vdr:vasarajanauloja - replacement for the liemikuutio patch, adds some nice must haves features
media-video/vdr:volctrl - allows volume control using left/right keys
media-video/vdr:wareagleicon - Replace original icon set in menu
media-video/vdr:yaepg - Enables support for the plugin vdr-yaepg
media-video/vlc:X - Enables support for, e.g., fullscreen mode via the X Window System. By itself, this flag does not build a graphical interface.
media-video/vlc:atmo - Enables support for AtmoLight (homebrew Ambient Lighting Technology)
media-video/vlc:audioqueue - Enables AudioQueue audio module for Mac OS X.
media-video/vlc:avcodec - Enables libavcodec support for video/audio encoding/decoding. libavcodec is part of FFmpeg.
media-video/vlc:avformat - Enables libformat support for reading and writing various media containers. libavformat is part of FFmpeg.
media-video/vlc:bluray - Enables libbluray for Blu-ray disc support.
media-video/vlc:chromaprint - Enables libchromaprint for Chromaprint based audio fingerprinter support.
media-video/vlc:dc1394 - Enables IIDC cameras support.
media-video/vlc:dirac - Enable Dirac video support (an advanced royalty-free video compression format) via the reference library: dirac.
media-video/vlc:direct2d - Enable Win7/VistaPU Direct2D support.
media-video/vlc:directx - Enable Win32 DirectX support.
media-video/vlc:dshow - Enables Win32 DirectShow support.
media-video/vlc:dvbpsi - Enables support for Mpeg-TS files (.ts, .m2ts, .mts) via media-libs/libdvbpsi.
media-video/vlc:dxva2 - Enables Win32 DxVA2 support.
media-video/vlc:egl - Enables EGL video output module.
media-video/vlc:faad - Enable AAC audio decoding library support via media-libs/faad2.
media-video/vlc:fbosd - Enables the framebuffer overlay plugin.
media-video/vlc:fdk - Enables the Fraunhofer AAC codec library.
media-video/vlc:fluidsynth - Enables Fluidsynth MIDI software synthesis (with external sound fonts).
media-video/vlc:gcrypt - Enables cryptography support via libgcrypt.
media-video/vlc:gme - Enables support for media-libs/game-music-emu for playing various video game music formats.
media-video/vlc:gnome - Adds support for GNOME's filesystem abstraction layer, gnome-base/gnome-vfs. This flag is not GUI-related.
media-video/vlc:growl - Enables growl notification support (over UDP for remote access and native on OSX)
media-video/vlc:httpd - Enables a web based interface for vlc.
media-video/vlc:ios-vout - Enables iPhone OS video output.
media-video/vlc:kate - Adds support for Ogg Kate subtitles via libkate.
media-video/vlc:libproxy - Enables support for proxy settings in the HTTP access module.
media-video/vlc:libtar - Uses libtar instead of the built-in tar reader for reading custom skins.
media-video/vlc:libtiger - Enables Ogg Kate subtitles rendering using libtiger.
media-video/vlc:linsys - Enables support for Linux Linear Systems Ltd. SDI and HD-SDI input cards.
media-video/vlc:live - Enables live555 streaming media support (client support for rtsp).
media-video/vlc:lua - Enable Lua scripting support, needed for including support for Jamendo (online music platform) and similar things.
media-video/vlc:macosx - Enables Mac OS X gui support.
media-video/vlc:macosx-audio - Enables Mac OS X audio module.
media-video/vlc:macosx-dialog-provider - Enables Mac OS X dialog module.
media-video/vlc:macosx-eyetv - Enables Mac OS X EyeTV (TNT Tuner) module.
media-video/vlc:macosx-qtkit - Enables Mac OS X qtkit module: qtcapture (video) and qtsound (audio) module.
media-video/vlc:macosx-quartztext - Enables Mac OS X quartz text module.
media-video/vlc:macosx-vout - Enables Mac OS X video output module.
media-video/vlc:matroska - Enables matroska support using reference libraries (fallback on other existing matroska support if disabled, i.e., matroska enabled FFmpeg)
media-video/vlc:media-library - Build the (sqlite based) media library.
media-video/vlc:omxil - Enables OpenMAX Integration Layer codec module.
media-video/vlc:opencv - Enabled OpenCV (computer vision) filter module.
media-video/vlc:optimisememory - Enable optimisation for memory rather than performance.
media-video/vlc:opus - Support opus decoding via libopus.
media-video/vlc:postproc - Enables image post-processing via libpostproc (part of FFmpeg).
media-video/vlc:projectm - Enables the projectM visualization plugin.
media-video/vlc:pvr - Enables PVR cards access module.
media-video/vlc:qt4 - Builds a x11-libs/qt based frontend, a graphical interface.
media-video/vlc:rdp - Enables freerdp for RDP/Remote Desktop client support
media-video/vlc:rtsp - Enables real audio and RTSP modules.
media-video/vlc:run-as-root - Allows vlc to start for root. Don't enable this unless you have a very specific (e.g. embedded) need for it!
media-video/vlc:schroedinger - Enable Dirac video support (an advanced royalty-free video compression format) via libschroedinger (high-speed implementation in C of the Dirac codec).
media-video/vlc:sdl-image - Enables sdl image video decoder (depends on sdl)
media-video/vlc:sftp - Enables libssh2 to support SFTP file transfer.
media-video/vlc:shine - Enables shine fixed point mp3 encoder.
media-video/vlc:shout - Enables libshout output.
media-video/vlc:sid - Adds support for playing C64 SID files through media-libs/libsidplay-2.
media-video/vlc:skins - Enables support for the skins2 interface.
media-video/vlc:switcher - Enables MPEG2 video switcher stream output module.
media-video/vlc:swscale - Enables image scaling and conversion via libswscale (part of FFmpeg).
media-video/vlc:tremor - Enables tremor, a fixed-point version of the Ogg Vorbis decoder.
media-video/vlc:twolame - Enables twolame support (MPEG Audio Layer 2 encoder).
media-video/vlc:upnp - Enables support for the Intel SDK stack based UPnP discovery module instead of CyberLink.
media-video/vlc:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
media-video/vlc:vcdx - Enables VCD with navigation via libvcdinfo (depends on cdio)
media-video/vlc:visual - Enables a libvisual based visualization plugin.
media-video/vlc:vlm - New videolan (media) manager (vlm), a little manager designed to launch and manage multiple streams from within one instance of VLC.
media-video/vlc:vpx - Enables the decoder(s) from the WebM VP8 / VP9 Codec SDK.
media-video/vlc:waveout - Enable win32 waveOut plugin.
media-video/vlc:wingdi - Enable Win32 GDI module.
media-video/vlc:wma-fixed - Enables fixed point WMA decoder.
media-video/vlc:xcb - Support the X C-language Binding, a replacement for Xlib; !!! you will need this option to be able to integrate video in the Qt interface, see bug #500678.
media-video/vlc:zvbi - Enables support for teletext subtitles via the zvbi library.
media-video/winki:mjpeg - Enables mjpegtools support
media-video/x264-encoder:10bit - Set output bit depth to 10
media-video/x264-encoder:avs - enable AvxSynth support in the AviSynth input module
media-video/x264-encoder:ffmpegsource - Enable ffmpegsource aka ffms support, disables lavf
media-video/x264-encoder:interlaced - Enable interlaced encoding support, this can decrease encoding speed by up to 2%
media-video/xine-ui:vdr - Enables Video Disk Recorder support
net-analyzer/2ping:crc - Enable crc check.
net-analyzer/2ping:md5 - Enable md5 hash check.
net-analyzer/2ping:server - Install the server init scripts.
net-analyzer/2ping:sha - Enable sha1 or sha256 check.
net-analyzer/aimsniff:http - Install the WAS (Web AIM Sniff) frontend
net-analyzer/argus-clients:ft - Enable support for flow packets through net-analyzer/flow-tools
net-analyzer/barnyard:sguil - Enable sguil (The Analyst Console for Network Security Monitoring) support
net-analyzer/barnyard2:aruba - Enable Aruba support
net-analyzer/barnyard2:gre - Enable GRE support
net-analyzer/barnyard2:mpls - Enable support for mpls networks
net-analyzer/bmon:rrdtool - Enables net-analyzer/rrdtool support
net-analyzer/bwm-ng:csv - Enable csv output
net-analyzer/bwm-ng:html - Enable html output
net-analyzer/cacti:doc - install html documentation
net-analyzer/echoping:http - enable support for http protocol.
net-analyzer/echoping:icp - enable support for ICP (used to monitor proxies).
net-analyzer/echoping:priority - enable socket priority support.
net-analyzer/echoping:smtp - enable support for SMTP protocol.
net-analyzer/echoping:tos - enable support for TOS (TYpe Of Service).
net-analyzer/ettercap:plugins - Install ettercap plugins (et_*.so)
net-analyzer/flowgrind:pcap - Enable packet capturing support using net-libs/libpcap
net-analyzer/fprobe:messages - enable console messages
net-analyzer/gr-fosphor:glfw - enable GLFW based interface
net-analyzer/httping:tfo - Enable support for TCP Fast Open
net-analyzer/hydra:ncp - NCP protocol (NetWare) support through net-fs/ncpfs
net-analyzer/icinga:contrib - additional scripts
net-analyzer/icinga:eventhandler - Adds support for running custom scripts whenever a host or service state change occurs
net-analyzer/icinga:idoutils - Adds DB support
net-analyzer/icinga:lighttpd - Adds Lighttpd support
net-analyzer/icinga:plugins - Adds support for nagios plugins
net-analyzer/icinga:web - Adds generic web interface support
net-analyzer/icinga-web:pnp - Enables pnp4nagios integration
net-analyzer/lilac:nmap - Installs nmap which can be used to automatically discover devices to monitor.
net-analyzer/linkchecker:bookmarks - Mozilla Bookmark parsing
net-analyzer/linkchecker:login - login form submission
net-analyzer/linkchecker:nagios - Install nagios cli plugin
net-analyzer/linkchecker:sqlite - Mozilla Bookmark parsing
net-analyzer/linkchecker:syntax-check - HTML/CSS syntax checks
net-analyzer/metasploit:development - Install dependancies needed for metasploit and exploit development
net-analyzer/metasploit:gui - Enable Java GUI
net-analyzer/metasploit:lorcon - Enable lorcon for raw packet injection
net-analyzer/metasploit:oracle - Enable restricted oracle modules which have additional deps
net-analyzer/metasploit:pcap - Enable libpcap for packet sniffing
net-analyzer/munin:apache - Set up the configuration of the CGI generation of HTML and graphs to work with Apache. This also install an include-able configuration file.
net-analyzer/munin:asterisk - Install the packages required for monitoring Asterisk. Disabling the flag does not remove any plugin files.
net-analyzer/munin:cgi - Install the CGI-compatible scripts for on-the-fly generation of web pages and graphs. This is only meaningful if the minimal USE flag is disabled.
net-analyzer/munin:dhcpd - Install dev-perl/Net-IP, dev-perl/HTTP-Date and net-misc/dhcp to monitor DHCP lease usage. This only works if the server is on the same system as the node, so the server is also brought in. Disabling the flag does not remove any plugin file.
net-analyzer/munin:doc - Build and install a local copy of the HTML documentation for the whole software. This requires dev-python/sphinx to process the documentation sources.
net-analyzer/munin:http - Install dev-perl/libwww-perl required for monitoring HTTP-based services such as Apache and nginx. Disabling the flag does not remove any plugin file.
net-analyzer/munin:ipmi - Install sys-apps/ipmitool required for monitoring IPMI sensors. Disabling the flag does not remove any plugin file.
net-analyzer/munin:ipv6 - Add support for IPv6 in munin-node. IPv6 support for the master is always enabled, but the node requires a newer version of dev-perl/net-server, capable of listening to IPv6 sockets.
net-analyzer/munin:irc - Install the packages required for monitoring IRC. Disabling the flag does not remove any plugin files.
net-analyzer/munin:java - Build the Java-based plugins to monitor JMX-compatible applications. Disabling the flag removes the jmx monitoring plugins.
net-analyzer/munin:memcached - Install the packages required for memcached monitoring. Disabling the flag does not remove any plugin files.
net-analyzer/munin:minimal - Only install munin-node and its plugins. This excludes the scripts to generate the web pages and the graphs.
net-analyzer/munin:mysql - Install the packages required for monitoring MySQL. Disabling the flag does not remove any plugin files.
net-analyzer/munin:postgres - Install the packages required for monitoring PostgreSQL. Disabling the flag does not remove any plugin files.
net-analyzer/munin:syslog - Configure the node by default to log on syslog. This requires the presence of virtual/perl-Sys-Syslog. As of version 2.0.2, the master scripts only log to file, and not to syslog.
net-analyzer/nagios-core:lighttpd - install www-servers/lighttpd config
net-analyzer/nagios-core:web - enable web interface
net-analyzer/nagios-plugins:jabber - Install the script for sending IM notifications over Jabber with Nagios.
net-analyzer/nagios-plugins:nagios-dns - Install net-dns/bind-tools required for monitoring DNS servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-game - Install games-util/qstat required for monitoring FPS servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-ntp - Install net-misc/ntp required for monitoring NTP servers and drifts. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-ping - Install net-analyzer/fping required for fancy ping monitoring. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:nagios-ssh - Install net-misc/openssh required for monitoring SSH servers. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:smart - Install sys-apps/smartmontools required for S.M.A.R.T. disk monitoring. Disabling the flag removes the plugin file. This plugin also requires the sudo flag to be enable.
net-analyzer/nagios-plugins:snmp - Install dev-perl/Net-SNMP required for monitoring SNMP values. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins:sudo - Install a file to allow the nagios user to execute some commands via app-admin/sudo, so that the scripts can access devices and features that wouldn't be otherwise allowed by nagios.
net-analyzer/nagios-plugins:suid - Give root privileges to the ICMP, DHCP and IDE S.M.A.R.T. check binaries. This allows them to ignore the access controls that would disallow the nagios user from running the check.
net-analyzer/nagios-plugins:ups - Install sys-power/nut required for monitoring compatible UPS units. Disabling the flag does not remove any plugin file.
net-analyzer/nagios-plugins-flameeyes:smart - Install sys-apps/smartmontools required for S.M.A.R.T. disk monitoring. Disabling the flag removes the plugin file. This plugin also requires the sudo flag to be enable.
net-analyzer/nagvis:automap - Enable automated map generation using media-gfx/graphviz
net-analyzer/ncrack:ssh - Compile and link against the internal openssh modified library.
net-analyzer/net-snmp:elf - Enable the use of elf utils to check uptime on some systems
net-analyzer/net-snmp:mfd-rewrites - Use MFD rewrites of mib modules where available
net-analyzer/net-snmp:netlink - Use dev-libs/libnl to fetch TCP statistics instead of using /proc/net/tcp (Linux only).
net-analyzer/net-snmp:pci - Use libpci (from sys-apps/pciutils) to look up network interface description. This feature is only available on Linux.
net-analyzer/net-snmp:rpm - Enable monitoring of app-arch/rpm. This flag requires the bzip2 and zlib flags to be enabled as well.
net-analyzer/net-snmp:ucd-compat - Build UCD compatibility library. Increases significantly the install size.
net-analyzer/netperf:demo - Emit interim results during the run. May affect results
net-analyzer/netperf:sctp - Include tests to measure SCTP performance
net-analyzer/nfdump:compat15 - Enable read support for nfdump data files created with nfdump 1.5.x
net-analyzer/nfdump:ftconv - Build the flow-tools to nfdump converter
net-analyzer/nfdump:nfprofile - Build nfprofile used by NfSen
net-analyzer/nfdump:nftrack - Build nfprofile used by PortTracker
net-analyzer/nfdump:readpcap - Build nfcapd collector to read from pcap file instead ofnetwork data
net-analyzer/nfdump:sflow - Build sflow collector sfcpad
net-analyzer/nmap:lua - Include support for the Nmap Scripting Engine (NSE) through dev-lang/lua
net-analyzer/nmap:ncat - Install the ncat utility
net-analyzer/nmap:ndiff - Install the ndiff utility
net-analyzer/nmap:nmap-update - Install nmap-update, which uses dev-vcs/subversion to update nmap scripts in your home directory
net-analyzer/nmap:nping - Install the nping utility
net-analyzer/nmap:zenmap - Install the GTK+ based zenmap utility
net-analyzer/nrpe:command-args - Build support for specifying the command-line arguments from the Nagios/Icinga master. Make sure you understand the implications of this flag as it can be a security risk.
net-analyzer/nrpe:minimal - Only build the check plugins for Nagios/Icinga, and not the daemon.
net-analyzer/nsca:crypt - Build support for crypted communication with nsca, through dev-libs/mcrypt. It's recommended not to disable this flag unless all the communication will be handled in an absolutely safe environment.
net-analyzer/nsca:minimal - Only build and install the send_nsca command and not the daemon. This allows a very minimal install with no overhead when setting up a node.
net-analyzer/pchar:pcap - Use the net-libs/libpcap library
net-analyzer/pmacct:64bit - Use 64bit counters instead of 32bit ones
net-analyzer/pmacct:mongodb - Add support for mongodb backend
net-analyzer/pmacct:ulog - Enable ULOG support
net-analyzer/rrdcollect:exec - Enable exec:/// support
net-analyzer/rrdcollect:librrd - Use the librrd library from net-analyzer/rrdtool
net-analyzer/rrdtool:graph - Enable support for graphing functions
net-analyzer/rrdtool:rrdcgi - Build rrdcgi support
net-analyzer/sancp:sguil - Enable sguil (The Analyst Console for Network Security Monitoring) support
net-analyzer/sarg:gd - Enable support for graphs in reports through media-libs/gd
net-analyzer/sarg:pcre - Enable support for regular expressions in the hostalias file through dev-libs/libpcre
net-analyzer/scanlogd:nids - Use net-libs/libnids for packet capturing
net-analyzer/scanlogd:pcap - Use net-libs/libpcap for packet capturing
net-analyzer/scapy:pyx - Enable dev-python/pyx support for psdump/pdfdump commands
net-analyzer/scapy:tcpreplay - Enable net-analyzer/tcpreply support for fast packet replay
net-analyzer/scapy:visual - Enable dev-python/visual support for 3d graphs
net-analyzer/smokeping:dig - Install net-dns/bind-tools for dig functionality
net-analyzer/smokeping:echoping - Install net-analyzer/echoping for echoping functionality
net-analyzer/smokeping:ssh - Install ssh functionality
net-analyzer/smokeping:telnet - Install dev-perl/Net-Telnet for telnet functionality
net-analyzer/snort:active-response - Enables support for automatically sending TCP resets and ICMP unreachable messages to terminate connections. Used with inline deployments.
net-analyzer/snort:control-socket - Enables Snort's control socket.
net-analyzer/snort:dynamicplugin - Enable ability to dynamically load preprocessors, detection engine, and rules library. This is required if you want to use shared object (SO) snort rules.
net-analyzer/snort:file-inspect - Enables extended file inspection capabilities.
net-analyzer/snort:flexresp3 - Enables support for new flexable response preprocessor for enabling connection tearing for inline deployments. Replaces flexresp and flexresp2.
net-analyzer/snort:gre - Enable support for inspecting and processing Generic Routing Encapsulation (GRE) packet headders. Only needed if you are monitoring GRE tunnels.
net-analyzer/snort:high-availability - Enables high-availability state sharing.
net-analyzer/snort:inline-init-failopen - Enables support to allow traffic to pass (fail-open) through inline deployments while snort is starting and not ready to begin inspecting traffic. If this option is not enabled, network traffic will not pass (fail-closed) until snort has fully started and is ready to perform packet inspection.
net-analyzer/snort:large-pcap-64bit - Allows Snort to read pcap files that are larger than 2 GB. ONLY VALID FOR 64bit SYSTEMS!
net-analyzer/snort:linux-smp-stats - Enable accurate statistics reporting through /proc on systems with multipule processors.
net-analyzer/snort:mpls - Enables support for processing and inspecting Multiprotocol Label Switching MPLS network network traffic. Only needed if you are monitoring an MPLS network.
net-analyzer/snort:non-ether-decoders - Enable decoding of non-ethernet protocols such as TokenRing, FDDI, IPX, etc.
net-analyzer/snort:normalizer - Enables support for normalizing packets in inline deployments to help minimize the chances of detection evasion.
net-analyzer/snort:paf - Enables support for Protocol Aware Flushing. This allows Snort to statefully scan a stream and reassemble a complete protocol data unit regardless of segmentation.
net-analyzer/snort:perfprofiling - Enables support for preprocessor and rule performance profiling using the perfmonitor preprocessor.
net-analyzer/snort:ppm - Enables support for setting per rule or per packet latency limits. Helps protect against introducing network latency with inline deployments.
net-analyzer/snort:react - Enables support for the react rule keyword. Supports interception, termination, and redirection of HTTP connections.
net-analyzer/snort:reload-error-restart - Enables support for completely restarting snort if an error is detected durring a reload.
net-analyzer/snort:shared-rep - Enables the use of shared memory for the Reputation Preprocessor (Only available on Linux systems)
net-analyzer/snort:side-channel - Enables Snort's the side channel.
net-analyzer/snort:sourcefire - Enables Sourcefire specific build options, which include --enable-perfprofiling and --enable-ppm.
net-analyzer/snort:targetbased - Enables support in snort for using a host attibute XML file (attribute_table.dtd). This file needs to be created by the user and should define the IP address, operating system, and services for all hosts on the monitored network. This is cumbersome, but can improve intrusion detection accuracy.
net-analyzer/snort:zlib - Enables HTTP inspection of compressed web traffic. Requires dynamicplugin be enabled.
net-analyzer/symon:perl - Enables a generic perl symux client
net-analyzer/symon:symon - Enables the system monitor. Offers no functionality but monitoring and forwarding of measured data
net-analyzer/symon:symux - Enables the multiplexer which stores incoming symon streams on disk in RRD (net-analyzer/rrdtool) files
net-analyzer/tcpdump:chroot - Chroot into /var/lib/tcpdump when dropping privileges
net-analyzer/tcpdump:drop-root - Drop privileges to tcpdump:tcpdump when run as root
net-analyzer/tcpdump:smi - Build with net-libs/libsmi to load MIBs on the fly to decode SNMP packets
net-analyzer/tcpreplay:pcapnav - Enable if you want the jump to byte offset feature via net-libs/libpcapnav
net-analyzer/tcpreplay:tcpdump - Use net-analyzer/tcpdump for packet decoding feature
net-analyzer/wireshark:adns - Use the GNU net-dns/c-ares library to resolve DNS names
net-analyzer/wireshark:crypt - Use dev-libs/libgcrypt to decrypt traffic
net-analyzer/wireshark:doc-pdf - Build documentation in pdf format (US and a4 paper sizes)
net-analyzer/wireshark:gtk - Build the wireshark executable with a GTK+ UI version 2.
net-analyzer/wireshark:gtk2 - Build the wireshark executable with a GTK+ UI version 2.
net-analyzer/wireshark:gtk3 - Build the wireshark executable with a GTK+ UI version 3.
net-analyzer/wireshark:libadns - Use net-lib/adns (DEPRECATED) instead of net-dns/c-ares to resolve DNS names
net-analyzer/wireshark:netlink - Use dev-libs/libnl
net-analyzer/wireshark:pcap - Use net-libs/libpcap for network packet capturing (build dumpcap, rawshark)
net-analyzer/wireshark:qt4 - Build the wireshark executable with an experimental Qt UI instead of GTK+.
net-analyzer/wireshark:smi - Use net-libs/libsmi to resolve numeric OIDs into human readable format
net-analyzer/zabbix:agent - Enable zabbix agent (for to-be-monitored machines)
net-analyzer/zabbix:frontend - Enable zabbix web frontend
net-analyzer/zabbix:ipv6 - Turn on support of IPv6
net-analyzer/zabbix:java - Enable Zabbix Java JMX Management Gateway
net-analyzer/zabbix:libxml2 - Use libxml2 client library
net-analyzer/zabbix:odbc - Enable Database Monitor and use UnixODBC Library by default
net-analyzer/zabbix:openipmi - Enable openipmi things
net-analyzer/zabbix:proxy - Enable proxy support
net-analyzer/zabbix:server - Enable zabbix server
net-analyzer/zabbix:ssh - SSH v2 based checks
net-analyzer/zabbix:static - Build statically linked binaries
net-analyzer/zmap:json - Add support to store results JSON based
net-analyzer/zmap:redis - Add support for storing in a redis DB via dev-libs/hiredis
net-dialup/accel-ppp:shaper - Support for traffic shaping
net-dialup/capi4k-utils:fax - Install capi-fax demo programs
net-dialup/capi4k-utils:pppd - Installs pppdcapiplugin modules
net-dialup/capi4k-utils:rcapid - Installs rcapid daemon
net-dialup/freeradius:bindist - Disallow building the dev-db/firebird module, which is not compatible with GPL-2.
net-dialup/freeradius:pcap - Build the RADIUS sniffer which requires net-libs/libpcap.
net-dialup/freeradius-client:scp - Add service type hints derived from username prefix
net-dialup/freeradius-client:shadow - Enable shadow password support
net-dialup/mgetty:fax - Enables fax support
net-dialup/mgetty:fidonet - Enables FidoNet support
net-dialup/ppp:activefilter - Enables active filter support
net-dialup/ppp:atm - Enables ATM (Asynchronous Transfer Mode) protocol support
net-dialup/ppp:dhcp - Installs PPP DHCP client plugin for IP address allocation by a DHCP server (see http://www.netservers.co.uk/gpl/)
net-dialup/ppp:eap-tls - Enables support for Extensible Authentication Protocol and Transport Level Security (see http://www.nikhef.nl/~janjust/ppp/index.html)
net-dialup/ppp:gtk - Installs GTK+ password prompting program that can be used by passprompt.so PPP plugin for reading the password from a X11 input terminal
net-dialup/ppp:ipv6 - Enables support for IP version 6
net-dialup/ppp:mppe-mppc - Enables support for MPPC (Microsoft Point-to-Point Compression) - NEEDS A PATCHED KERNEL <=2.6.14 (see http://mppe-mppc.alphacron.de)
net-dialup/ppp:pam - Enables PAM (Pluggable Authentication Modules) support
net-dialup/ppp:radius - Enables RADIUS support
net-dialup/pptpd:gre-extreme-debug - Log all GRE accepted packages when in debug mode (required if you want upstream support)
net-dialup/xl2tpd:dnsretry - Patch for host lookup retries, activated by redial feature
net-dialup/xl2tpd:kernel - Enable kernel interface for PPPoL2TP
net-dns/avahi:autoipd - Build and install the IPv4LL (RFC3927) network address configuration daemon
net-dns/avahi:bookmarks - Install the avahi-bookmarks application (requires dev-python/twisted)
net-dns/avahi:gtk3 - Build the avahi-ui-gtk3 library, and use gtk3 for the avahi utilities under USE=utils
net-dns/avahi:howl-compat - Enable compat libraries for howl
net-dns/avahi:introspection - Use dev-libs/gobject-introspection for introspection
net-dns/avahi:mdnsresponder-compat - Enable compat libraries for mDNSResponder
net-dns/avahi:utils - Install the avahi gtk+ utils avahi-discover, bssh, and bvnc
net-dns/bind:dlz - Enables dynamic loaded zones, 3rd party extension
net-dns/bind:filter-aaaa - Enable filtering of AAAA records over IPv4
net-dns/bind:fixed-rrset - Enables fixed rrset-order option
net-dns/bind:gost - Enables gost OpenSSL engine support
net-dns/bind:gssapi - Enable gssapi support
net-dns/bind:rpz - Enable response policy rewriting (rpz)
net-dns/bind:rrl - Response Rate Limiting (RRL) - Experimental
net-dns/bind:sdb-ldap - Enables ldap-sdb backend
net-dns/bind:urandom - Use /dev/urandom instead of /dev/random
net-dns/bind-tools:gost - Enables gost OpenSSL engine support
net-dns/bind-tools:gssapi - Enable gssapi support
net-dns/bind-tools:urandom - Use /dev/urandom instead of /dev/random
net-dns/ddclient:hardened - Use iproute2 instead of ifconfig to grab an IP address
net-dns/ddclient:ssl - Connect to the server utilizing SSL
net-dns/dnsmasq:auth-dns - Add support for acting as an authorative DNS server.
net-dns/dnsmasq:conntrack - Add support for Linux conntrack connection marking.
net-dns/dnsmasq:dhcp - Enable support for reading ISC DHCPd lease files
net-dns/dnsmasq:dhcp-tools - Install extra command line tools for manually managing DHCP leases
net-dns/dnsmasq:script - Enable support for calling scripts when leases change
net-dns/dnsmasq:tftp - Enables built in TFTP server for netbooting
net-dns/knot:fastparser - Enables fast DNS zone parser.
net-dns/ldns-utils:ecdsa - Enable ECDSA support
net-dns/ldns-utils:gost - Enable GOST support
net-dns/maradns:authonly - Allows one to build only authoritative DNS server
net-dns/mydns:alias - Enable David Phillips aliasing
net-dns/mydns:status - Enable the STATUS opcode to check server status
net-dns/nsd:bind8-stats - Enables BIND8 like NSTATS and XSTATS
net-dns/nsd:libevent - Use libevent or libev, useful when zone count is high
net-dns/nsd:minimal-responses - If minimal responses are disabled, responses are more likely to get truncated, resulting in TCP fallback
net-dns/nsd:munin - Install a plugin for net-analyzer/munin to graph statistical data from nsd.
net-dns/nsd:nsec3 - Enable NSEC3 support
net-dns/nsd:ratelimit - Enables ratelimiting, based on query name, type and source
net-dns/nsd:root-server - Configure NSD as a root server
net-dns/nsd:runtime-checks - Enable runtime checks, this could lead to a reduced service level
net-dns/nsd:zone-stats - Enable per-zone statistics logging, this could lead to a reduced service level
net-dns/opendnssec:auditor - Enables auditing capabilities for OpenDNSSEC
net-dns/opendnssec:eppclient - Enables support for automatic submission of DNSSEC keys to an upstream epp server
net-dns/opendnssec:external-hsm - Enables support for storing DNSSEC keys through an arbitrary non-portage PKCS#11 interface, specified through an environment variable
net-dns/opendnssec:opensc - Enables support for storing DNSSEC keys through a dev-libs/opensc PKCS#11 interface
net-dns/opendnssec:signer - Enables signing capabilities for OpenDNSSEC
net-dns/opendnssec:softhsm - Enables support for storing DNSSEC keys in a dev-libs/softhsm PKCS#11 object
net-dns/pdns:botan - Make it possible to use the dev-libs/botan library for crypto-related stuff (like DNSSec) which can be significantly faster than PolarSSL.
net-dns/pdns:cryptopp - Make it possible to use the dev-libs/crypto++ library for crypto-related stuff (like DNSSec) which can be significantly faster than PolarSSL.
net-dns/pdns:mydns - Making it possible to use a MyDNS MySQL database with PowerDNS (not recommended for new deployments).
net-dns/pdns:opendbx - Use a database supported by dev-db/opendbx as backend.
net-dns/pdns:remote - Use a generic socket or pipe as a backend (via JSON RPC requests).
net-dns/pdns:remote-http - Enable remote connections to HTTP as backends (via RESTful JSON requests).
net-dns/pdns:tinydns - Use a TinyDNS CDB database as backend.
net-dns/pdns:tools - Build optional tools (dnsscan, dnsscope, etc..).
net-dns/pdnsd:isdn - Linux-only: check status of ippp interfaces with ISDN-specific system calls.
net-dns/pdnsd:urandom - Linux-only: use /dev/urandom (pseudo-random number generation) instead of the default use of random() PRNG.
net-dns/resolvconf-symlink:symlink - Actually replace /etc/resolv.conf with a symlink. Without this flag, the ebuild is a no-op.
net-dns/unbound:gost - Enable GOST support
net-firewall/arno-iptables-firewall:plugins - Install optional plugins
net-firewall/firewalld:gui - Builds and installs GUI configurator and GTK+ applet
net-firewall/ipsec-tools:hybrid - Makes available both mode-cfg and xauth support
net-firewall/ipsec-tools:idea - Enable support for the IDEA algorithm
net-firewall/ipsec-tools:nat - Enable NAT-Traversal
net-firewall/ipsec-tools:rc5 - Enable support for the patented RC5 algorithm
net-firewall/ipsec-tools:stats - Enable statistics reporting
net-firewall/ipt_netflow:pax_kernel - Apply patch needed for pax enabled kernels
net-firewall/iptables:netlink - Build against libnfnetlink which enables the nfnl_osf util
net-firewall/nufw:nfconntrack - Use netfilter_conntrack
net-firewall/nufw:nfqueue - Use NFQUEUE instead of QUEUE
net-firewall/nufw:pam_nuauth - Add support for pam nufw from PAM
net-firewall/nufw:plaintext - Add support for authentication with plaintext files
net-firewall/pftop:altq - Enable altq(4) support — alternate queuing of network packets.
net-firewall/pglinux:cron - Install cron script
net-firewall/pglinux:logrotate - Install logrotate.d file
net-firewall/ufw-frontends:kde - Use kdesu to gain root privileges (note: the flag has lower priority than "policykit")
net-firewall/ufw-frontends:policykit - Use pkexec to gain root privileges
net-fs/autofs:dmalloc - Enable debugging with the dmalloc library
net-fs/autofs:hesiod - Install hesiod module
net-fs/autofs:ldap - Install LDAP module
net-fs/autofs:libtirpc - Use TiRPC library instead of SunRPC
net-fs/autofs:mount-locking - Enable locking to prevent corruption of /etc/mtab in the presence of concurrent auto-mounting. If enabled, recursive auto-mounting (eg. using autofs to bind or loop mount a filesystem which is itself auto-mounted) is not possible.
net-fs/autofs:sasl - Enable SASL support in the LDAP module
net-fs/cifs-utils:ads - Enable Active Directory support and create cifs.idmap binary - idmap support
net-fs/cifs-utils:caps - libcap support
net-fs/cifs-utils:caps-ng - libcap-ng support
net-fs/cifs-utils:creds - cifs credentials support
net-fs/cvmfs:client - Install the cvmfs client programs and init script
net-fs/cvmfs:server - Install the cvmfsd program and init script
net-fs/netatalk:appletalk - Build support for Apple's AppleTalk (DDP) protocol and its utilities (atalkd, timelord, papd).
net-fs/netatalk:cups - Add support for net-print/cups printers in papd. This flag is only considered if appletalk USE flag is enabled, and is otherwise ignored.
net-fs/netatalk:pgp - Add support pgp authentication module
net-fs/netatalk:quota - Add support for user quota on various filesystems.
net-fs/netatalk:shadow - Add shadow support
net-fs/netatalk:ssl - Use dev-libs/openssl to provide DHX User Access Modules. These are not used with most recent versions of OS X and can be kept disabled without risks.
net-fs/netatalk:tracker - Add support for spotlight like tracker
net-fs/netatalk:utils - Install afpstats script
net-fs/nfs-utils:libmount - Link mount.nfs with libmount
net-fs/nfs-utils:nfsdcld - Enable nfsdcld NFSv4 clientid tracking daemon
net-fs/nfs-utils:nfsidmap - Enable support for newer nfsidmap helper
net-fs/nfs-utils:nfsv3 - Enable support for NFSv3
net-fs/nfs-utils:nfsv4 - Enable support for NFSv4
net-fs/nfs-utils:nfsv41 - Enable support for NFSv4.1
net-fs/nfs-utils:nonfsv4 - Disable support for NFSv4
net-fs/nfs-utils:uuid - Support UUID lookups in rpc.mountd
net-fs/samba:addns - Enable AD DNS integration
net-fs/samba:ads - Enable Active Directory support
net-fs/samba:aio - Enable asynchronous IO support
net-fs/samba:client - Enables the client part
net-fs/samba:cluster - Enable support for clustering
net-fs/samba:dmapi - Enable support for DMAPI. This currently works only in combination with XFS.
net-fs/samba:iprint - Enabling iPrint technology by Novell
net-fs/samba:ldb - Enable the ldb tools
net-fs/samba:netapi - Enable building of netapi bits
net-fs/samba:quota - Enables support for user quotas
net-fs/samba:server - Enables the server part
net-fs/samba:smbclient - Enable smbclient tool
net-fs/samba:smbsharemodes - Enable special smb share modes (?)
net-fs/samba:smbtav2 - Enable Samba Traffic Analyzer version 2
net-fs/samba:swat - Enables support for swat configuration gui
net-fs/samba:winbind - Enables support for the winbind auth daemon
net-fs/smbnetfs:gnome - Use the gnome-base/gnome-keyring for password management.
net-ftp/frox:transparent - Enable transparent proxying of data connections
net-ftp/lftp:convert-mozilla-cookies - Install the convert-mozilla-cookies script and its run-time dependencies
net-ftp/lftp:openssl - Use dev-libs/openssl for SSL connections
net-ftp/lftp:verify-file - Install the verify-file script and its run-time dependencies
net-ftp/proftpd:authfile - Enable support for the auth-file module
net-ftp/proftpd:ban - Enable support for the mod_ban module
net-ftp/proftpd:case - Enable support for the mod_case module
net-ftp/proftpd:copy - Enable support for the mod_copy module
net-ftp/proftpd:ctrls - Enable support for the mod_ctrls and mod_ctrls_admin modules
net-ftp/proftpd:deflate - Enable support for the mod_deflate module
net-ftp/proftpd:diskuse - Enable support for the mod_diskuse module
net-ftp/proftpd:dso - Enable support for the mod_dso module
net-ftp/proftpd:dynmasq - Enable support for the mod_dynmasq module, for dynamically updating MasqueradeAddress for dyndns-like scenarios)
net-ftp/proftpd:exec - Enable support for the mod_exec module. WARNING: this could be a security risk
net-ftp/proftpd:ident - Enable support for the mod_ident module
net-ftp/proftpd:ifsession - Enable support for the ifsession module
net-ftp/proftpd:ifversion - Enable support for the mod_ifversion module
net-ftp/proftpd:linguas_bg_BG - Language support for bg_BG
net-ftp/proftpd:linguas_fr_FR - Language support for fr_FR
net-ftp/proftpd:linguas_it_IT - Language support for it_IT
net-ftp/proftpd:linguas_ja_JP - Language support for ja_JP
net-ftp/proftpd:linguas_ru_RU - Language support for ru_RU
net-ftp/proftpd:memcache - Enable support for the mod_memcache module, for using memcached servers
net-ftp/proftpd:msg - Enable support for the mod_msg module, allows system users to send messages to connected clients via the ftpdctl program.
net-ftp/proftpd:openssl - Enable dev-libs/openssl support
net-ftp/proftpd:qos - Enable support for the mod_qos module
net-ftp/proftpd:ratio - Enable support for the mod_ratio module
net-ftp/proftpd:readme - Enable support for the mod_readme module
net-ftp/proftpd:rewrite - Enable support for the rewrite module
net-ftp/proftpd:sftp - Enable support for the mod_sftp module and optionally mod_sftp_sql and mod_sftp_pam if matching USE flags are enabled
net-ftp/proftpd:shaper - Enable support for the mod_shaper module
net-ftp/proftpd:sitemisc - Enable support for the sitemisc module
net-ftp/proftpd:softquota - Enable support for the quotatab module
net-ftp/proftpd:trace - Build with trace support. Should not be enabled on production servers
net-ftp/proftpd:vroot - Enable support for the virtual root module
net-ftp/pure-ftpd:anondel - Permit anonymous to delete files
net-ftp/pure-ftpd:anonperm - Permit anonymous to change file permissions
net-ftp/pure-ftpd:anonren - Permit anonymous to rename files
net-ftp/pure-ftpd:anonres - Permit anonymous to resume file transfers
net-ftp/pure-ftpd:charconv - Enables charset conversion
net-ftp/pure-ftpd:noiplog - Disables logging of IP addresses
net-ftp/pure-ftpd:paranoidmsg - Display paranoid messages instead of normal ones
net-ftp/pure-ftpd:resolveids - Resolve UIDs/GIDs
net-ftp/pure-ftpd:sysquota - Enables system quota support (needs sys-fs/quota)
net-ftp/pure-ftpd:vchroot - Enable support for virtual chroot (possible security risk)
net-ftp/yafc:ssh - Build with SFTP support
net-im/ayttm:irc - Enable Internet Relay Chat support
net-im/ayttm:lj - Enable livejournal.com support
net-im/ayttm:smtp - Adds support for sending messages via RFC2821 SMTP
net-im/ayttm:webcam - Adds webcam support for Yahoo Messenger
net-im/bitlbee:libevent - Use libevent for event handling
net-im/bitlbee:nss - Use NSS for SSL support in MSN and Jabber
net-im/bitlbee:otr - Enable support for encrypted conversations
net-im/bitlbee:plugins - Enable support for plugins
net-im/bitlbee:purple - Use libpurple instead of the built-in IM protocol support
net-im/bitlbee:skype - Enable Skype support
net-im/bitlbee:twitter - Enable Twitter protocol support
net-im/centerim:gadu - Enable support for the Gadu-Gadu protocol
net-im/centerim:irc - Enable support for the IRC protocol
net-im/centerim:lj - Enable support for the LiveJournal weblog system
net-im/centerim:otr - Enable encrypted conversations
net-im/climm:otr - Enable encrypted conversations
net-im/ejabberd:captcha - Support for CAPTCHA Forms (XEP-158)
net-im/ejabberd:mod_irc - Build irc gateway
net-im/ejabberd:mod_muc - Build Multi User Chat module
net-im/ejabberd:mod_proxy65 - Support for SOCKS5 Bytestreams (XEP-0065)
net-im/ejabberd:mod_pubsub - Build Pubsub module
net-im/ejabberd:mod_statsdx - Measures several statistics, and provides a new section in ejabberd Web Admin to view them.
net-im/ejabberd:web - Enable web admin interface
net-im/ekg2:gadu - Enable Gadu-Gadu protocol support (requires net-libs/libgadu).
net-im/ekg2:gif - GIF token support for Gadu-Gadu protocol.
net-im/ekg2:gnutls - Enable SSL/TLS support through GnuTLS for the plugins supporting it. If 'ssl' is enabled too, GnuTLS will be preferred where possible (and OpenSSL will be used elsewhere).
net-im/ekg2:gpg - Enable jabber message encryption through app-crypt/gpgme.
net-im/ekg2:jpeg - JPEG token support for Gadu-Gadu protocol.
net-im/ekg2:minimal - Disable building extra plugins with no additional deps.
net-im/ekg2:openssl - Support encryption in sim plugin, using OpenSSL.
net-im/ekg2:oracle - Support logging messages into Oracle database.
net-im/ekg2:sqlite - Support logging messages into SQLite2 database. If 'sqlite3' is set too, it will be used instead.
net-im/ekg2:sqlite2 - Prefer SQLite2 over SQLite3 (if USE=sqlite is set).
net-im/ekg2:sqlite3 - Support logging messages into SQLite3 database. If 'sqlite' is set too, SQLite3 will be used.
net-im/ekg2:ssl - Enable the complete SSL/TLS support through OpenSSL. This also enables the 'sim' plugin which relies on OpenSSL.
net-im/empathy:geoloc - Enable geolocation support through app-misc/geoclue
net-im/empathy:gnome-online-accounts - Enable using net-libs/gnome-online-accounts for authorization (e.g. for Google Talk)
net-im/empathy:map - Enable world map support through media-libs/libchamplain
net-im/empathy:nautilus - Enable nautilus-sendto support
net-im/empathy:webkit - Build support for Adium-style HTML-based conversation window themes using net-libs/webkit-gtk
net-im/err:irc - Pull optional dependencies, needed for IRC backend
net-im/err:plugins - Enable support for installing plugins with dev-vcs/git
net-im/gajim:idle - Enable idle module
net-im/gajim:srv - SRV capabilities
net-im/gajim:xhtml - Enable XHTML support
net-im/jabberd2:experimental - Enable experimental features such as TLS Everywhere.
net-im/jabberd2:memdebug - Enable nad and pool debug. Requires USE="debug" to be set.
net-im/kadu:gadu - Enables Gadu communication protocol
net-im/kadu:mpd - Enables Music Player Daemon support
net-im/kadu:phonon - Enables phonon audio plugin
net-im/kadu:sdk - Install Kadu SDK (cmake module, API headers)
net-im/kadu:speech - Enables speech module
net-im/kmess:konqueror - Enable integration with konqueror
net-im/kmess:libnotify - Enable desktop notifications using the knotify library
net-im/ktp-accounts-kcm:modemmanager - Enable support for mobile broadband devices
net-im/licq:aosd - Build the advanced on screen display plugin.
net-im/mcabber:aspell - Adds support for app-text/aspell spell checker.
net-im/mcabber:otr - Enable encrypted conversations using Off-The-Records messaging
net-im/minbif:video - Add video support
net-im/pidgin:gadu - Enable Gadu Gadu protocol support
net-im/pidgin:groupwise - Enable Novell Groupwise protocol support
net-im/pidgin:gstreamer - Enables voice and video sessions
net-im/pidgin:gtk - Builds Pidgin, the GTK+ interface
net-im/pidgin:meanwhile - Enable meanwhile support for Sametime protocol
net-im/pidgin:mxit - Enable mxit protocol support
net-im/pidgin:ncurses - Build finch, console interface
net-im/pidgin:prediction - Enable Contact Availability Prediction plugin
net-im/pidgin:python - Build libgnt (GLib Ncurses Toolkit used by finch) with python scripting support
net-im/pidgin:silc - Enable SILC protocol support
net-im/pidgin:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/pidgin:zephyr - Enable Zephyr protocol support
net-im/prosody:jit - Use LuaJIT instead of vanilla Lua
net-im/prosody:libevent - Use libevent for event handling
net-im/prosody:zlib - Support for compressing XMPP streams with mod_compression
net-im/psi:enchant - Use enchant spell engine instead of aspell
net-im/psi:extras - Enables extra non official patches
net-im/psi:iconsets - Install additional iconsets, some of them has not clear licensing
net-im/psi:plugins - Enable plugins support
net-im/psi:powersave - Disable some non critical timers for much less CPU usage
net-im/psi:webkit - Enable chatlog rendering using webkit
net-im/psi:whiteboarding - Enable experimental interactive SVG drawing
net-im/psi:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/psimedia:demo - build simple test application for the PsiMedia system
net-im/pyaim-t:webinterface - Install dependencies needed for the web interface
net-im/pyicq-t:webinterface - Install dependencies needed for the web interface
net-im/qutim:aspell - Enable spellchecking using app-text/aspell
net-im/qutim:awn - Enable integration with gnome-extra/avant-window-navigator
net-im/qutim:crypt - Enable AES crypto plugin
net-im/qutim:histman - Enable history importer plugin
net-im/qutim:hunspell - Enable spellchecking using app-text/hunspell
net-im/qutim:irc - Enable IRC protocol support
net-im/qutim:kinetic - Enable Growl-like kinetic popups plugin
net-im/qutim:mrim - Enable mail.ru protocol support
net-im/qutim:multimedia - Add sound support via dev-qt/qtmultimedia
net-im/qutim:otr - Enable plugin for encrypted conversations (Off-The-Record messaging)
net-im/qutim:phonon - Add sound support via media-libs/phonon or dev-qt/qtphonon
net-im/qutim:purple - Enable libpurple-based protocol support
net-im/qutim:qml - Enable QtQuick-based chat plugin
net-im/qutim:sdl - Add sound support via media-libs/sdl-mixer
net-im/qutim:telepathy - Enable telepathy-based protocol support
net-im/qutim:vkontakte - Enable vkontakte protocol support
net-im/qutim:webkit - Enable Adium-like WebView plugin
net-im/qutim:xscreensaver - Use X screensaver protocol extension to monitor idle/active status based on mouse/keyboard events
net-im/skype:pax_kernel - Triggers a paxmarking of the main skype binary
net-im/skype:qt-static - Install the main skype binary with internal copy of Qt
net-im/telepathy-connection-managers:irc - Enable Internet Relay Chat (IRC) support.
net-im/telepathy-connection-managers:jabber - Enable XMPP protocol handler (this is also Google Talk).
net-im/telepathy-connection-managers:sip - Enable SIP/SIMPLE messaging and calling.
net-im/telepathy-connection-managers:sipe - Enable Sip Exchange Protocol.
net-im/telepathy-connection-managers:yahoo - Enable Yahoo! messaging support.
net-im/telepathy-connection-managers:zeroconf - Enable Link-Local Messaging via the zeroconf or Bonjour protocol.
net-im/telepathy-mission-control:upower - Use sys-power/upower to detect suspend and resume
net-im/tkabber:extras - Enables extra non official patches
net-im/tkabber:plugins - Enables installation the extra plugins
net-im/vacuum:adiummessagestyle - Use UI styles created for Adium
net-im/vacuum:annotations - Enable adding comments to the contacts in the roster
net-im/vacuum:aspell - Select app-text/aspell spell checker backend
net-im/vacuum:autostatus - Change the status in accordance with the time of inactivity
net-im/vacuum:avatars - Enable assigning and displaying avatars
net-im/vacuum:birthdayreminder - Reminds about birthdays of your friends
net-im/vacuum:bitsofbinary - Allow other modules to receive or send a small amount of binary data in XMPP stanza
net-im/vacuum:bookmarks - Enable creating bookmarks of the Jabber conferences and Web pages
net-im/vacuum:captchaforms - Perform tests for humanity outside of Web browser
net-im/vacuum:chatstates - Post user's activity to the chat
net-im/vacuum:clientinfo - Enable sending and receiving peer's application version, local time and last activity info
net-im/vacuum:commands - Enable performing special commands provided by various services
net-im/vacuum:compress - Compress stream of messages
net-im/vacuum:console - Enable inspecting a raw XML stream
net-im/vacuum:dataforms - Allow other modules to process and display data forms intended for the user
net-im/vacuum:datastreamsmanager - Enable initiating a custom data stream between two XMPP entities
net-im/vacuum:emoticons - Enable using smiley images in messages
net-im/vacuum:enchant - Select app-text/enchant spell checker backend
net-im/vacuum:filemessagearchive - Allows to save the history of conversations to local files
net-im/vacuum:filestreamsmanager - Enable transferring files between two XMPP entities
net-im/vacuum:filetransfer - Enable sending files to peers
net-im/vacuum:gateways - Simplify the interaction with gateways to other IM systems
net-im/vacuum:hunspell - Select app-text/hunspell spell checker backend
net-im/vacuum:inbandstreams - Enable initiating in-band data stream between two XMPP enitites
net-im/vacuum:iqauth - Enable logging on Jabber servers withous SASL authentication support
net-im/vacuum:jabbersearch - Enable searching contacts in Jabber networks
net-im/vacuum:messagearchiver - Enable saving the communication history both locally and on the server
net-im/vacuum:messagecarbons - Allows to keep all user IM clients engaged in a conversation
net-im/vacuum:multiuserchat - Enable Jabber multi-user conferences
net-im/vacuum:pepmanager - Allows other plugins to recieve and publish PEP events
net-im/vacuum:privacylists - Enable blocking the undesirable contacts
net-im/vacuum:privatestorage - Allow other modules to store arbitrary data on the server
net-im/vacuum:recentcontacts - Displays a recently used contacts
net-im/vacuum:registration - Enable creating accounts in Jabber services
net-im/vacuum:remotecontrol - Allows to remotely control the client
net-im/vacuum:rosteritemexchange - Allows to exchange contact list items
net-im/vacuum:rostersearch - Allows to search for contacts in the roster
net-im/vacuum:servermessagearchive - Allows to save the history of communications on the server
net-im/vacuum:servicediscovery - Enable receiving information about Jabber entities
net-im/vacuum:sessionnegotiation - Enable initiating the session between two entities with setting the rules for XMPP stanzas exchange
net-im/vacuum:shortcutmanager - Allows to setup user defined shortcuts
net-im/vacuum:socksstreams - Enable initiating SOCKS5 data streams between two XMPP entities
net-im/vacuum:urlprocessor - Allows other plugins to load data from custom types of URLs
net-im/vacuum:vcard - Enable obtaining peer's personal contact information
net-im/vacuum:vcs-revision - Add VCS revision to version number, INSECURE.
net-im/vacuum:xmppuriqueries - Allow other plugins to handle XMPP URI queries
net-irc/atheme-services:cracklib - Enable nickserv/cracklib module for enforcing strong account passwords
net-irc/atheme-services:largenet - Enable support/tweaks for large networks
net-irc/atheme-services:ldap - Enable ldap-backed authentication module
net-irc/atheme-services:perl - Install a perl module which wraps around the services' XML-RPC interface
net-irc/bip:freenode - Enables freenode-specific functionality. Currently that is only support for mute lists (MODE #channel +q).
net-irc/bip:noctcp - Disable the automatic CTCP VERSION reply which is often exploited by malicious people to cause a DoS (reconnect due to flooding).
net-irc/bip:oidentd - Enable oidentd support
net-irc/charybdis:largenet - Enable support/tweaks for large networks
net-irc/epic5:archive - Use app-arch/libarchive to use zip and tar archives from scripts.
net-irc/epic5:valgrind - Compile against dev-util/valgrind headers to improve memory-leak checking when running epic5 under valgrind.
net-irc/hexchat:fastscroll - Make scrolling of large text buffers faster by circumventing some of pango's overhead
net-irc/hexchat:gtkspell - Use app-text/gtkspell for spell checking instead of static method (needs spell)
net-irc/hexchat:libcanberra - Enable sound event support using media-libs/libcanberra
net-irc/hexchat:libproxy - Enable proxy support.
net-irc/hexchat:ntlm - Enable NTLM authentication
net-irc/hexchat:plugin-checksum - Build Checksum plugin (needs plugins)
net-irc/hexchat:plugin-doat - Build Do At plugin (needs plugins)
net-irc/hexchat:plugin-fishlim - Build FiSHLiM plugin (needs plugins )
net-irc/hexchat:plugin-sysinfo - Build SysInfo plugin (needs plugins)
net-irc/hexchat:plugins - Enable plugin support and installs some built-in plugins
net-irc/hexchat:sexy - Use x11-libs/libsexy for spell checking instead of static method (needs spell)
net-irc/hexchat:theme-manager - Build the theme manager (mono)
net-irc/inspircd:geoip - Add geoip support for country and city lookup based on IPs
net-irc/inspircd:gnutls - Enable TLS support
net-irc/inspircd:ipv6 - Enable support for IP version 6
net-irc/inspircd:ldap - Enable LDAP support
net-irc/inspircd:mysql - Enable MySQL database backend
net-irc/inspircd:pcre - Adds support for Perl Compatible Regular Expressions
net-irc/inspircd:posix - Adds support for POSIX-compatible functions
net-irc/inspircd:postgres - Enable PostgreSQL database backend
net-irc/inspircd:sqlite - Enable Sqlite database backend
net-irc/inspircd:ssl - Enable SSL support
net-irc/inspircd:tre - Enable support for TRE, a lightweight, robust, and efficient POSIX compliant regexp matching library
net-irc/iroffer-dinoex:admin - Compile with HTTP Admin
net-irc/iroffer-dinoex:blowfish - Compile with blowfish encryption support
net-irc/iroffer-dinoex:chroot - Compile with chroot support
net-irc/iroffer-dinoex:http - Compile with HTTP server support
net-irc/iroffer-dinoex:kqueue - Compile with kqueue() support
net-irc/iroffer-dinoex:memsave - Compile with memory protection
net-irc/iroffer-dinoex:telnet - Compile with Telnet server support
net-irc/irssi:proxy - Adds support for a loadable IRC proxy module
net-irc/kvirc:dcc_video - Support video connections over DCC protocol
net-irc/kvirc:dcc_voice - Support voice connections over DCC protocol
net-irc/kvirc:ipc - Support inter-process communication between KVIrc processes
net-irc/kvirc:phonon - Support Phonon for audio output
net-irc/kvirc:qt-dbus - Support Qt-DBus
net-irc/kvirc:transparency - Support pseudo-transparency
net-irc/ngircd:ident - Enables support for net-libs/libident
net-irc/psybnc:multinetwork - Adds support for multiple networks
net-irc/psybnc:oidentd - Adds support for oidentd
net-irc/psybnc:scripting - Adds scripting support
net-irc/quassel:X - Build the Qt 4 GUI client for quassel. If this USE flag is disabled, the GUI is not built, and cannot be used. You might want to disable this on the server, but you need it enabled on the client.
net-irc/quassel:crypt - Support core->network per-channel and per-query blowfish encryption via app-crypt/qca:2.
net-irc/quassel:monolithic - Build Standalone client with integrated core, no external quasselcore needed. Only useful if you don't want to use quassels client/server model. The server and X flags are not needed in this case but it is possible to enable them too.
net-irc/quassel:phonon - Build client with phonon backend support. This enables sound playback in client.
net-irc/quassel:server - Build the server binary. If this USE flag is disabled, the 'core' server binary for quassel is not built, and cannot be used. You need this enabled on the server, but you might want to disable it on the client.
net-irc/quassel:webkit - Use qt-webkit rendering engine for showing URL thumbnails and for other things that need web browser integration.
net-irc/rbot:aspell - Use aspell instead of ispell in the "spell" plugin for rbot. The vanilla plugin uses ispell, but enabling this flag makes it use the ispell interface from aspell instead.
net-irc/rbot:cal - Add dependency over a package providing the /usr/bin/cal command, which is needed to enable the "cal" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:dict - Add dependency over dev-ruby/ruby-dict, which is needed to enable the "dict" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:figlet - Add dependency over app-misc/figlet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use figlet; if toilet is also disabled, the plugin will be disabled.
net-irc/rbot:fortune - Add dependency over games-misc/fortune-mod, which is needed to enable the "fortune" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:host - Add dependency over net-dns/bind-tools (providing /usr/bin/host), which is needed to enable the "host" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:nls - Build and install translation for the messages coming from the bot and its plugins (through dev-ruby/ruby-gettext).
net-irc/rbot:shorturl - Add dependency over dev-ruby/shorturl, which is needed to enable the "shortenurl" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:timezone - Add dependency over dev-ruby/tzinfo to enable the "time" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/rbot:toilet - Add dependency over app-misc/toilet, which is used by the "figlet" plugin for rbot. If the USE flag is disabled the plugin will be unable to use toilet; if figlet is also disabled, the plugin will be disabled.
net-irc/rbot:translator - Add dependency over dev-ruby/mechanize, which is needed to enable the "translator" plugin for rbot. If the USE flag is disabled the plugin is also disabled by default.
net-irc/shadowircd:largenet - Enable support/tweaks for large networks
net-irc/srvx:bahamut - Choose bahamut protocol over p10 protocol
net-irc/supybot:twisted - Allows supybot to use dev-python/twisted as driver
net-irc/unrealircd:extban-stacking - Enable extended channel bans (such as +b ~c: and +b ~n:) to contain other extended bans instead of just hostmasks.
net-irc/unrealircd:operoverride - Enable OperOverride extension
net-irc/unrealircd:operoverride-verify - Enable requiring opers to invite themselves to +s/+p channels
net-irc/unrealircd:prefixaq - Enable chanadmin and chanowner prefixes
net-irc/unrealircd:showlistmodes - Support displaying channel modes in /list
net-irc/unrealircd:shunnotices - Enable notifying a user when un-shunned
net-irc/unrealircd:spoof - Enable the spoof protection
net-irc/unrealircd:topicisnuhost - Enable displaying nick!user@host as topic setter
net-irc/unrealircd:usermod - Enable /set* and /chg* commands
net-irc/weechat:alias - Enable plugin for alias control.
net-irc/weechat:charset - Enable encoding conversions.
net-irc/weechat:fifo - Enable FIFO support (sh pipes).
net-irc/weechat:irc - Enable IRC protocol support.
net-irc/weechat:logger - Enable support for logging.
net-irc/weechat:relay - Enable relay plugin (experimental)
net-irc/weechat:rmodifier - Enable rmodifier plugin.
net-irc/weechat:scripts - Build infrastructure for scripting.
net-irc/weechat:xfer - Enable xfer plugin support.
net-irc/znc:daemon - Allow znc to run as a system-wide service. Installs an init script and creates a znc user:group.
net-libs/aqbanking:chipcard - Enable support for DDV/RSA-chipcards
net-libs/axtls:cgi-lua - Enables lua backed cgi for axhttpd server
net-libs/axtls:cgi-php - Enables php backed cgi for axhttpd server
net-libs/axtls:httpd - Enables axhttpd web server component
net-libs/axtls:static - Statically build axhttpd server
net-libs/c-client:chappa - Enable Eduardo Chappa's patches for use with mail-client/alpine (mainly adds support for maildir)
net-libs/c-client:doc - Install RFCs related to IMAP
net-libs/c-client:topal - Enable support for net-mail/topal for use with mail-client/alpine
net-libs/courier-authlib:vpopmail - Enable vpopmail support
net-libs/cvm:vpopmail - Enable vpopmail support
net-libs/cyassl:aes - Enable AES cipher support
net-libs/cyassl:aes-ccm - Eanble AES Counter with CBC-MAC mode
net-libs/cyassl:aes-gcm - Enable AES Galois/Counter mode
net-libs/cyassl:aes-ni - Enable Intel AES instruction support
net-libs/cyassl:arc4 - Enable ARC4 cipher support
net-libs/cyassl:asn - Enable ASN cipher support
net-libs/cyassl:atomicuser - Enable Atomic User Record Layer
net-libs/cyassl:big - Choose big cache size (excludes small or huge)
net-libs/cyassl:blake2 - Enable CyaSSL BLAKE2 support
net-libs/cyassl:camellia - Enable Camellia-CBC cipher support
net-libs/cyassl:coding - Enable Coding base 16/64
net-libs/cyassl:crl - Enable Certificate Revocation List
net-libs/cyassl:crl-monitor - Enable Certificate Revocation List Directory Monitoring
net-libs/cyassl:cyassl-hardening - Add hardening flags to CFLAGS/LDFLAGS
net-libs/cyassl:des3 - Enable triple DES support
net-libs/cyassl:dh - Enable DH cipher support
net-libs/cyassl:dsa - Enable DSA cipher support
net-libs/cyassl:dtls - Enable datagram TLS (must be disabled for tests)
net-libs/cyassl:ecc - Enable Elliptic Curve support
net-libs/cyassl:errorstrings - Enable error strings table
net-libs/cyassl:extra - Enable extra OpenSSL API
net-libs/cyassl:fortress - Enable fortress SSL build (requires extra and SHA512)
net-libs/cyassl:hc128 - Enable HC-128 support
net-libs/cyassl:httpd - Enable features for yaSSL web server
net-libs/cyassl:huge - Choose big cache size (excludes small or big)
net-libs/cyassl:leanpsk - Enable lean PSK support (requires psk)
net-libs/cyassl:maxfragment - Enable Maximum Fragment Length
net-libs/cyassl:mcapi - Enable Microchip API
net-libs/cyassl:md2 - Enable MD2 support
net-libs/cyassl:md4 - Enable MD4 support
net-libs/cyassl:md5 - Enable MD5 support
net-libs/cyassl:memory - Enable memory callbacks
net-libs/cyassl:nullcipher - Enable nullcipher support
net-libs/cyassl:ocsp - Enable Online Certificate Status Protocol
net-libs/cyassl:pkcallbacks - Enable Public Key Callbacks
net-libs/cyassl:psk - Enable Pre-Shared Key support
net-libs/cyassl:pwdbased - Enable PWDBASED (requires extra)
net-libs/cyassl:rabbit - Enable RABBIT cipher support
net-libs/cyassl:ripemd - Enable RIPEMD-160 support
net-libs/cyassl:rsa - Enable RSA cihper support
net-libs/cyassl:savecert - Support certificate saving
net-libs/cyassl:savesession - Support session saving
net-libs/cyassl:sep - Enable sep extensions
net-libs/cyassl:sessioncerts - Store session certificates
net-libs/cyassl:sha - Enable SHA cipher support
net-libs/cyassl:sha512 - Enable SHA-160 support
net-libs/cyassl:small - Choose small cache size (excludes big or huge)
net-libs/cyassl:sni - Enable server name indication
net-libs/cyassl:sniffer - Allow collection/decryption of SSL traffic
net-libs/cyassl:testcert - Enable certificate testing
net-libs/cyassl:tlsx - Enable all TLS Extensions
net-libs/cyassl:truncatedhmac - Enable Truncated HMAC
net-libs/daq:afpacket - Build the AFPacket data acquisition module. Functions similar to the PCAP module but with better performance. Snort can run unprivileged when using this module. AFpacket supports both inline and passive modes.
net-libs/daq:dump - Build the Dump data acquisition module. The dump DAQ allows you to test the various inline mode features available in 2.9 Snort like injection and normalization.
net-libs/daq:ipq - Build the IPQ data acquisition module. IPQ is the old way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module.
net-libs/daq:nfq - Build the NFQ data acquisition module. NFQ is the new way to process iptables packets for inline deployments. Snort can not run unprivileged when using this module.
net-libs/daq:pcap - Build the PCAP data acquisition module.
net-libs/glib-networking:gnome - Extract HTTP/HTTPS/SOCKS proxy configuration stored using GSettings
net-libs/glib-networking:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
net-libs/gnome-online-accounts:gnome - Use gnome-base/gnome-control-center to set GNOME online accounts preferences
net-libs/gnutls:bindist - Disallow building LZO support, because of a license incompatibility with dev-libs/lzo.
net-libs/gnutls:crywrap - Build the crywrap TLS proxy service
net-libs/gnutls:dane - Build libgnutls-dane, implementing DNS-based Authentication of Named Entities. Requires net-dns/unbound.
net-libs/gnutls:nettle - Use dev-libs/nettle as crypto backend
net-libs/gnutls:pkcs11 - Add support for PKCS#11 through app-crypt/p11-kit
net-libs/gtk-vnc:gtk3 - Build the gtk3 gtk-vnc library and other gtk3 assets
net-libs/gtk-vnc:introspection - Use dev-libs/gobject-introspection for introspection
net-libs/gtk-vnc:vala - Enable bindings for dev-lang/vala
net-libs/gupnp-igd:introspection - Use dev-libs/gobject-introspection for introspection
net-libs/h323plus:aec - Enable acoustic echo cancellation
net-libs/h323plus:audio - Enable audio codecs
net-libs/h323plus:video - Enable video codecs
net-libs/iax:snomhack - Use slower memset for SNOM phoneem
net-libs/ldns:ecdsa - Enable ECDSA support
net-libs/ldns:gost - Enable GOST support
net-libs/libbtbb:wireshark - Build the wireshark plugin for bluetooth baseband sniffing
net-libs/libeXosip:srv - enable support for SRV records DNS queries
net-libs/libesmtp:ssl - Enable support for advanced SMTP authentication methods, like NTML and STARTTLS. Also use OpenSSL's MD5 implementation over internal version.
net-libs/libetpan:liblockfile - Enable support for liblockfile library
net-libs/libgsasl:gcrypt - Use dev-libs/libgcrypt for low-level crypto
net-libs/libgsasl:ntlm - Add support for Microsoft's NTLM mechanism using net-libs/libntlm
net-libs/libinfinity:server - Build and install the server binary including init.d/conf.d-scripts. Needed if you want to host an infinote server for gobby.
net-libs/libkgapi:oldpim - Allow the use of non-akonadi kdepim-4.4
net-libs/libkolabxml:csharp - Enable C# language bindings
net-libs/libmicrohttpd:epoll - use epoll() system call
net-libs/libmicrohttpd:messages - enable error messages
net-libs/libnftnl:json - Supports parsing of JSON
net-libs/libnids:glib - Use dev-libs/glib for multiprocessing support
net-libs/libnids:libnet - Include code requiring net-libs/libnet
net-libs/libnm-qt:modemmanager - Enable support for mobile broadband devices
net-libs/liboauth:bindist - Alias for the nss USE flag, since there are license compliancy trouble when using OpenSSL.
net-libs/liboauth:curl - If enabled, net-misc/curl is used thorugh the libcurl library; if it's not, the curl command is used instead. Some features are only available when using the library, but using it as library requires matching SSL implementations.
net-libs/liboauth:nss - Use Mozilla NSS (dev-libs/nss) as hash library; if this is disabled, dev-libs/openssl is used instead.
net-libs/libosmocore:embedded - Build for embedded use and disable unsupported features
net-libs/libpcap:canusb - Use virtual/libusb to support Controller Area Network over USB (CAN USB)
net-libs/libpcap:netlink - Use dev-libs/libnl to put wireless interfaces in monitor mode.
net-libs/libprotoident:tools - Build and install command-line tools
net-libs/libproxy:gnome - Enable support for reading proxy settings from GNOME
net-libs/libproxy:kde - Enable support for reading proxy settings from KDE
net-libs/libproxy:spidermonkey - Use libmozjs from dev-lang/spidermonkey for PAC parsing
net-libs/libproxy:webkit - Use libjavascriptcoregtk from net-libs/webkit-gtk for PAC parsing
net-libs/libsocialweb:connman - Use net-misc/connman for getting network connection status information
net-libs/libsocialweb:gnome - Extract proxy information using net-libs/libsoup
net-libs/libsoup:samba - Use net-fs/samba for NTLM Single Sign-On
net-libs/libsrtp:aesicm - Use AES ICM cryptographic algorithm
net-libs/libsrtp:console - Use /dev/console instead of stdout for error messages
net-libs/libsrtp:syslog - Use syslog for error messages
net-libs/libssh:gcrypt - Prefer dev-libs/libgcrypt over dev-libs/openssl for encryption
net-libs/libssh:gssapi - Enable gssapi support
net-libs/libssh:pcap - Build with PCAP output support
net-libs/libssh:server - Build with SSH server support
net-libs/libssh:sftp - Build with SFTP support
net-libs/libssh:ssh1 - Build with SSH1 support
net-libs/libssh2:gcrypt - Use dev-libs/libgcrypt for crypto
net-libs/libvncserver:24bpp - enable 24bpp support
net-libs/libvncserver:gcrypt - enable support for gcrypt
net-libs/libvncserver:no24bpp - disable 24bpp support
net-libs/loudmouth:asyncns - Use libasyncns for asynchronous name resolution.
net-libs/neon:libproxy - Add support for net-libs/libproxy
net-libs/neon:pkcs11 - Add support for PKCS#11 using dev-libs/pakchois
net-libs/netembryo:sctp - Support for Stream Control Transmission Protocol
net-libs/nodejs:npm - Enable NPM package manager
net-libs/nodejs:snapshot - Enable snapshot creation for faster startup
net-libs/opal:audio - Enable audio support
net-libs/opal:capi - Enable CAPI support
net-libs/opal:celt - Enable CELT ultra-low delay audio codec
net-libs/opal:dtmf - Enable DTMF encoding/decoding support
net-libs/opal:fax - Enable T.38 FAX protocol
net-libs/opal:h224 - Enable H.224 real time control protocol
net-libs/opal:h281 - Enable H.281 Far-End Camera Control protocol
net-libs/opal:h323 - Enable H.323 protocol
net-libs/opal:iax - Enable Inter-Asterisk eXchange protocol
net-libs/opal:ilbc - Enable iLBC (RFC 3951) speech codec
net-libs/opal:ivr - Enable Interactive Voice Response
net-libs/opal:ixj - Enable xJack cards support
net-libs/opal:lid - Enable Line Interface Device
net-libs/opal:plugins - Enable plugins support
net-libs/opal:sbc - Enable the Bluetooth low-complexity, SubBand Codec
net-libs/opal:sip - Enable Session Initiation Protocol
net-libs/opal:sipim - Enable SIP Instant Messages session
net-libs/opal:srtp - Enable Secure Real-time Transport Protocol
net-libs/opal:stats - Enable statistic reporting
net-libs/opal:swig - Use swig to generate bindings
net-libs/opal:video - Enable video support
net-libs/opal:vpb - Enable Voicetronics VPB card support
net-libs/opal:vxml - Enable VXML support
net-libs/opal:wav - Enable WAVFILE support
net-libs/opal:x264-static - Install x264 plugin statically linked with x264
net-libs/ortp:ntp-timestamp - Turn on NTP timestamping on received packet
net-libs/ortp:srtp - Add support for Secure RTP
net-libs/pjsip:cli - Installs pjsua, a simple command-line SIP client
net-libs/pjsip:epoll - epoll system call support
net-libs/pjsip:ext-sound - External sound device support
net-libs/pjsip:g711 - Builds the G711 codec
net-libs/pjsip:g722 - Builds the G722 codec
net-libs/pjsip:g7221 - Builds the G7221 codec
net-libs/pjsip:ilbc - Builds the ilbc codec
net-libs/pjsip:l16 - Builds the L16 codec
net-libs/polarssl:havege - Enable the HAVEGE random generator. Warning: the HAVEGE random generator is not suitable for virtualized environments
net-libs/ptlib:asn - Enable ASN decoding/encoding support
net-libs/ptlib:audio - Enable audio support
net-libs/ptlib:dtmf - Enable DTMF encoding/decoding support
net-libs/ptlib:http - Enable HTTP support
net-libs/ptlib:mail - Enable mail protocols (POP3/SMTP)
net-libs/ptlib:qos - Enable QOS support
net-libs/ptlib:remote - Enable remote connection support
net-libs/ptlib:serial - Enable serial port support
net-libs/ptlib:shmvideo - Enable shared memory video devices
net-libs/ptlib:socks - Enable SOCKS protocol support
net-libs/ptlib:stun - Enable STUN support
net-libs/ptlib:telnet - Enable telnet protocol support
net-libs/ptlib:tts - Enable Text-To-Speech server support
net-libs/ptlib:video - Enable video support
net-libs/ptlib:vxml - Enable VoiceXML support
net-libs/ptlib:wav - Enable WAVFILE support
net-libs/qxmpp:vpx - Enable VP8 codec support via media-libs/libvpx
net-libs/rabbitmq-c:tools - Builds cli tools to interact with brokers
net-libs/rest:gnome - Extract proxy information using net-libs/libsoup-gnome
net-libs/telepathy-glib:vala - Enable bindings for dev-lang/vala
net-libs/telepathy-qt:farsight - Enable support for farsight connection manager
net-libs/telepathy-qt:farstream - Enable support for audio/video calls via farstream
net-libs/telepathy-qt:glib - Enable support for various telepathy/glib related packages
net-libs/webkit-gtk:coverage - Enable code coverage support
net-libs/webkit-gtk:egl - Enable EGL support.
net-libs/webkit-gtk:geoloc - Enable geolocation support through app-misc/geoclue
net-libs/webkit-gtk:gles2 - Enable GLESv2 support.
net-libs/webkit-gtk:libsecret - Enable libsecret support to store login credentials
net-libs/webkit-gtk:webgl - Build support for the WebGL HTML API using virtual/opengl
net-libs/webkit-gtk:webkit2 - Enable WebKit2 API that splits web content rendering and application UI into separate processes
net-libs/wt:extjs - Build Wt Ext library with JavaScript-only widgets (http://extjs.com/)
net-libs/wt:fcgi - Compile in FCGI connector
net-libs/wt:graphicsmagick - Enable GraphicsMagick, for supporting painting to raster images (PNG, GIF, ...) (WRasterImage)
net-libs/wt:resources - Install resources directory
net-libs/wt:server - Compile in stand-alone httpd connector
net-libs/wvstreams:boost - Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface.
net-libs/xrootd:fuse - Enable the sys-fs/fuse filesystem driver
net-libs/zeromq:pgm - 0MQ is build with 'Pragmatic General Multicast' (RFC 3208) support using the excellent OpenPGM implementation.
net-mail/amavis-logwatch:logwatch - Install filters for use with sys-apps/logwatch.
net-mail/automx:memcached - Enable memcached support
net-mail/automx:sql - Enable support for SQL backends
net-mail/automx:tools - Install additional automx-test tool
net-mail/courier-imap:trashquota - include deleted messages, and the Trash folder, in the estimated quota usage for maildirs
net-mail/cyrus-imapd:replication - Enable replication support in the cyrus imap server
net-mail/cyrus-imapd:sieve - Enable sieve support
net-mail/dbmail:sieve - Enable sieve filter support
net-mail/dovecot:cydir - Add cydir storage support
net-mail/dovecot:imapc - Add imap client storage support
net-mail/dovecot:lucene - Add lucene full text search (FTS) support using dev-cpp/clucene
net-mail/dovecot:lz4 - Add support for lz4 (de)compression
net-mail/dovecot:lzma - Add support for lzma (de)compression
net-mail/dovecot:managesieve - Add managesieve protocol support
net-mail/dovecot:mdbox - Add mdbox storage support
net-mail/dovecot:pop3c - Add pop3 client storage support
net-mail/dovecot:sdbox - Add sdbox storage support
net-mail/dovecot:sieve - Add sieve support
net-mail/dovecot:solr - Add solr full text search (FTS) support
net-mail/dovecot:vpopmail - Add vpopmail support
net-mail/fdm:courierauth - Add support for Courier authentication library
net-mail/fetchmail:hesiod - Enable support for hesiod
net-mail/fetchmail:socks - Enable support for socks proxy
net-mail/fetchmail:tk - Enable support for Tk GUI toolkit, in particular it installs fetchmailconf
net-mail/gnubiff:password - Enable save passwords to connect mail servers in user space
net-mail/hotwayd:smtp - Build SMTP proxy (hotsmtpd)
net-mail/lbdb:abook - Enables app-misc/abook support
net-mail/lbdb:finger - Enables finger support
net-mail/libpst:dii - enable dii support
net-mail/mailutils:clients - Build client programs - frm maidag mail sieve messages readmsg dotlock movemail mimeview mh
net-mail/mailutils:servers - Build server programs - imap4d pop3d comsatd
net-mail/mailutils:tokyocabinet - Enable Tokyo Cabinet database support
net-mail/mairix:gnus - Add support for the marks propagation feature in app-emacs/gnus
net-mail/mu:emacs - Install the mu4e mail client.
net-mail/mu:gui - Build and install the experimental gui 'mug'.
net-mail/notmuch:crypt - Support decryption and verification of PGP/MIME messages and in Emacs UI - encryption
net-mail/notmuch:doc - Install API documentation for enabled bindings
net-mail/notmuch:emacs - Install Emacs UI (the main one)
net-mail/notmuch:mutt - Install helper script for Mutt
net-mail/notmuch:nmbug - Install experimental tag sharing / pseudo-bug-tracking script for Notmuch (see http://notmuchmail.org/nmbug/)
net-mail/notmuch:pick - Experimental threaded message view for the emacs interface
net-mail/offlineimap:sqlite - Enable runtime support for sqlite mail status backend.
net-mail/postfix-logwatch:logwatch - Install filters for use with sys-apps/logwatch.
net-mail/qmailadmin:maildrop - Filter spam using maildrop
net-mail/qpopper:apop - Enables the pop.auth file in /etc/pop.auth
net-mail/qpopper:drac - Enables DRAC support
net-mail/qpopper:mailbox - Enables mail spool file is in home directory ~/Mailbox
net-mail/tpop3d:authexternal - Enable authentication by an external program
net-mail/tpop3d:drac - Enable dynamic relay support in the tpop3d pop3 server
net-mail/tpop3d:flatfile - Enable authentication against /etc/passwd-style flat files
net-mail/tpop3d:passwd - Enable /etc/passwd authentication
net-mail/tpop3d:sha1 - Use OpenSSL for sha1 encrypted passwords.
net-mail/tpop3d:shadow - Enable /etc/shadow authentication
net-mail/uw-imap:clearpasswd - Enables cleartext logins outside of SSL sessions
net-mail/vchkuser:debug - Enables debug messages to syslog
net-mail/vpopmail:clearpasswd - Enables cleartext password storage in the vpasswd files
net-mail/vpopmail:ipalias - Enables enable-ip-alias-domains
net-mail/vpopmail:maildrop - Enables mail-filter/maildrop support in vdelivermail
net-mail/vpopmail:spamassassin - Enables mail-filter/spamassassin support
net-misc/apt-cacher-ng:fuse - Install the sys-fs/fuse based acngfs, to use a userspace filesystem for the apt cache.
net-misc/aria2:bittorrent - Enable support for the bittorrent protocol.
net-misc/aria2:libuv - Use dev-libs/libuv backend.
net-misc/aria2:libxml2 - Use dev-libs/libxml2 for XML parsing (preferred) instead of dev-libs/expat.
net-misc/aria2:metalink - Enable support for metalink.
net-misc/aria2:nettle - Use dev-libs/nettle and dev-libs/gmp for bittorrent/metalink crypto instead of dev-libs/libgcrypt (when dev-libs/openssl is not being used).
net-misc/aria2:scripts - Install additional scripts which use aria2's xmlrpc functionality.
net-misc/asterisk:ais - Support clustering using the Application Interface Specification framework
net-misc/asterisk:cluster - Enable high-availability support through the Corosync Cluster Engine
net-misc/asterisk:dahdi - Support Digium compatible hardware (formerly known as Zaptel).
net-misc/asterisk:gtalk - Enable support for Google Talk services
net-misc/asterisk:http - Enable embedded web server
net-misc/asterisk:ilbc - Enable the Internet Low Bitrate Codec (iLBC)
net-misc/asterisk:newt - Include additional tools that require redhats windowing toolkit
net-misc/asterisk:osplookup - Support secure peering using the Open Settlement Protocol
net-misc/asterisk:samples - Install sample sound and configuration files (default: on)
net-misc/asterisk:span - Enable support for the spandsp codec
net-misc/asterisk:srtp - Enable support for encrypted voice transmission (secure RTP)
net-misc/asterisk-core-sounds:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-core-sounds:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-core-sounds:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-core-sounds:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-core-sounds:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-core-sounds:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-core-sounds:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-core-sounds:wav - Install the sounds files for the wav codec.
net-misc/asterisk-extra-sounds:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-extra-sounds:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-extra-sounds:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-extra-sounds:gsm - Install the sounds files for the +gsm codec.
net-misc/asterisk-extra-sounds:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-extra-sounds:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-extra-sounds:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-extra-sounds:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-extra-sounds:wav - Install the sounds files for the wav codec.
net-misc/asterisk-moh-opsound:alaw - Install the sounds files for the alaw codec.
net-misc/asterisk-moh-opsound:g722 - Install the sounds files for the g722 codec.
net-misc/asterisk-moh-opsound:g729 - Install the sounds files for the g729 codec.
net-misc/asterisk-moh-opsound:gsm - Install the sounds files for the +gsm codec.
net-misc/asterisk-moh-opsound:siren14 - Install the sounds files for the siren14 codec.
net-misc/asterisk-moh-opsound:siren7 - Install the sounds files for the siren7 codec.
net-misc/asterisk-moh-opsound:sln16 - Install the sounds files for the sln16 codec.
net-misc/asterisk-moh-opsound:ulaw - Install the sounds files for the ulaw codec.
net-misc/asterisk-moh-opsound:wav - Install the sounds files for the wav codec.
net-misc/badvpn:client - Build the badvpn-client program, a daemon that runs on endpoints of the VPN.
net-misc/badvpn:ncd - Build NCD, a lightweight scripting language especially suited for network configurations.
net-misc/badvpn:server - Build the badvpn-server program, a central server that manages the VPN network.
net-misc/badvpn:tun2socks - Build tun2socks, a program which implements a TUN device that forwards TCP traffic through a SOCKS5 server.
net-misc/badvpn:udpgw - Build udpgw, a small daemon which allows tun2socks to forward UDP traffic.
net-misc/batman-adv:bla - B.A.T.M.A.N. bridge loop avoidance
net-misc/batman-adv:dat - B.A.T.M.A.N. distributed arp table
net-misc/batman-adv:nc - B.A.T.M.A.N. network coding
net-misc/bfgminer:adl - Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
net-misc/bfgminer:antminer - Enable support for mining with AntMiner U1 sticks
net-misc/bfgminer:avalon - Enable support for mining with Avalon ASIC modules
net-misc/bfgminer:bfsb - Enable support for mining on BFSB host Raspberry Pi
net-misc/bfgminer:bifury - Enable support for mining with Bi*fury USB sticks
net-misc/bfgminer:bigpic - Enable support for mining with Big Picture Mining USB sticks (Red/BlueFury, BF1, etc)
net-misc/bfgminer:bitforce - Enable support for mining with ButterFly Labs BitFORCE ASICs and/or FPGAs
net-misc/bfgminer:bitfury - Enable support for mining with 55nm Bitfury-based devices
net-misc/bfgminer:cpumining - Enable support for mining with CPUs
net-misc/bfgminer:drillbit - Enable support for mining with Drillbit boards
net-misc/bfgminer:hashbuster - Enable support for mining with HashBuster nano boards
net-misc/bfgminer:hashbuster2 - Enable support for mining with HashBuster micro boards
net-misc/bfgminer:hashfast - Enable support for mining with HashFast devices
net-misc/bfgminer:icarus - Enable support for mining with Icarus-compatible devices (including Block Erupter Sapphire ASICs)
net-misc/bfgminer:klondike - Enable support for mining with Klondike USB miners
net-misc/bfgminer:libusb - Use libusb
net-misc/bfgminer:littlefury - Enable support for mining with LittleFury USB sticks
net-misc/bfgminer:metabank - Enable support for mining on Metabank host Raspberry Pi
net-misc/bfgminer:modminer - Enable support for mining with ModMiner FPGAs
net-misc/bfgminer:nanofury - Enable support for mining with NanoFury USB sticks
net-misc/bfgminer:opencl - Enable support for mining with OpenCL-capable devices (GPUs)
net-misc/bfgminer:padlock - Enable support for mining with VIA Padlock CPUs
net-misc/bfgminer:proxy - Enable support for virtual proxy device
net-misc/bfgminer:proxy_getwork - Enable proxy support for getwork protocol (often used with Block Erupter Blades)
net-misc/bfgminer:proxy_stratum - Enable proxy support for stratum protocol
net-misc/bfgminer:scrypt - Enable support for scrypt mining algorithm
net-misc/bfgminer:sse2_4way - Enable support for CPU SSE2 4way mining algorithm
net-misc/bfgminer:sse4 - Enable support for CPU SSE4 mining algorithm
net-misc/bfgminer:twinfury - Enable support for mining with Twinfury USB sticks
net-misc/bfgminer:x6500 - Enable support for mining with X6500 FPGAs
net-misc/bfgminer:ztex - Enable support for mining with Ztex FPGAs
net-misc/cfengine:html - Install HTML documentation
net-misc/cfengine:libvirt - Enable support for virtual machine management through app-emulation/libvirt
net-misc/cfengine:qdbm - Use dev-db/qdbm as database backend
net-misc/cfengine:tests - Install test files
net-misc/cfengine:tokyocabinet - Use dev-db/tokyocabinet as database backend
net-misc/cgminer:adl - Enable support for controlling fans and overclocking on AMD cards with AMD Display Library
net-misc/cgminer:ants1 - Enable support for Antminer S1 Bitmain
net-misc/cgminer:avalon - Enable support for Avalon ASICs
net-misc/cgminer:avalon2 - Enable support for Avalon2 ASICs
net-misc/cgminer:bab - Enable support for BlackArrow Bitfury
net-misc/cgminer:bflsc - Enable support for BFL ASICs
net-misc/cgminer:bitforce - Enable support for mining with ButterFly Labs BitFORCE FPGAs
net-misc/cgminer:bitfury - Enable support for mining with BitFury ASICs
net-misc/cgminer:bitmine_A1 - Enable support for mining with Bitmine.ch A1 ASICs
net-misc/cgminer:cointerra - Enable support for mining with Cointerra ASICs
net-misc/cgminer:drillbit - Enable support for mining with Drillbit BitFury ASICs
net-misc/cgminer:hashfast - Enable support for mining with Hashfast
net-misc/cgminer:icarus - Enable support for mining with Icarus FPGAs
net-misc/cgminer:klondike - Enable support for mining with Klondik ASICs
net-misc/cgminer:knc - Enable support for mining with KnC miners
net-misc/cgminer:minion - Enable support for mining with BlackArrow Bitfury
net-misc/cgminer:modminer - Enable support for mining with ModMiner FPGAs
net-misc/cgminer:opencl - Enable support for mining with OpenCL-capable devices (GPUs)
net-misc/cgminer:scrypt - Enable support for scrypt mining algorithm
net-misc/cgminer:ztex - Enable support for mining with Ztex FPGAs
net-misc/chrony:rtc - Include support for the Linux Real Time Clock interface
net-misc/connman:ethernet - Enable ethernet support.
net-misc/connman:ofono - Use net-misc/ofono for telephony support.
net-misc/connman:openconnect - Use net-misc/openconnect for VPN support.
net-misc/connman:openvpn - Use net-misc/openvpn for openvpn support.
net-misc/connman:tools - Enable testing tools.
net-misc/connman:vpnc - Use net-misc/vpnc for cisco VPN support.
net-misc/csync:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/curl:metalink - Enable metalink support
net-misc/curl:rtmp - Enable RTMPDump Streaming Media support
net-misc/curl:ssh - Enabled SSH urls in curl using libssh2
net-misc/curl:ssl - Enable crypto engine support (via openssl if USE='-gnutls -nss')
net-misc/dahdi:flash - Support (short) flash on FXS
net-misc/dahdi-tools:ppp - Enables PPP/DAHDIRAS support
net-misc/dhcp:client - Install the dhclient program
net-misc/dhcp:server - Install the dhcpd and dhcrelay programs
net-misc/directvnc:dmalloc - Enable debugging with the dmalloc library
net-misc/directvnc:mouse - Adds mouse support
net-misc/dropbear:bsdpty - Add support for legacy BSD pty's rather than dynamic UNIX pty's -- do not use this flag unless you are absolutely sure you actually want it
net-misc/dropbear:multicall - Build all the programs as one little binary (to save space)
net-misc/dropbear:shadow - Enable shadow password support
net-misc/dropbox:librsync-bundled - Use bundled librsync library
net-misc/electrum:qrcode - Enable QR code scanning with media-gfx/zbar/
net-misc/fatrat:bittorrent - Use the bittorrent protocol via net-libs/rb_libtorrent.
net-misc/fatrat:webinterface - Enable builtin webinterface.
net-misc/flexget:transmission - Support comminucation with net-p2p/transmission
net-misc/freerdp:channels - Build virtual channel plugins
net-misc/freerdp:client - Build client binaries
net-misc/freerdp:server - Build server binaries
net-misc/gsasl:gcrypt - Use dev-libs/libgcrypt for low-level crypto
net-misc/gsasl:ntlm - Add support for Microsoft's NTLM mechanism using net-libs/libntlm
net-misc/guacamole-server:ssh - enable support for ssh connections
net-misc/gwget:epiphany - Build epiphany extensions
net-misc/hotot:chrome - Build chrome browser extension
net-misc/htbinit:esfq - Add support for Enhanced Stochastic Fairness queueing discipline.
net-misc/hylafaxplus:html - Convert faxes into html email
net-misc/hylafaxplus:jbig - JBIG Fax Compression Support
net-misc/hylafaxplus:mgetty - Receive faxes via serial port connections
net-misc/hylafaxplus:pam - hfaxd authentication via PAM
net-misc/icecast:kate - Add karaoke and text encapsulation support for Ogg files
net-misc/icecast:logrotate - Install support files for app-admin/logrotate?
net-misc/icecast:yp - Build support for yp public directory listings
net-misc/iputils:SECURITY_HAZARD - Allow non-root users to flood (ping -f). This is generally a very bad idea.
net-misc/knock:server - Installs the knockd server daemon.
net-misc/libreswan:dnssec - Use DNSSEC resolver (requires net-dns/unbound
net-misc/lldpd:cdp - Enable Cisco Discovery Protocol
net-misc/lldpd:dot1 - Enable Dot1 extension (VLAN stuff)
net-misc/lldpd:dot3 - Enable Dot3 extension (PHY stuff)
net-misc/lldpd:edp - Enable Extreme Discovery Protocol
net-misc/lldpd:fdp - Enable Foundry Discovery Protocol
net-misc/lldpd:graph - Create dot graphs in documentations
net-misc/lldpd:json - Enable JSON output via Jansson
net-misc/lldpd:lldpmed - Enable LLDP-MED extension
net-misc/lldpd:seccomp - Enable use of libseccomp for system call filtering
net-misc/lldpd:snmp - Enable the use of SNMP
net-misc/lldpd:sonmp - Enable SynOptics Network Management
net-misc/mediatomb:id3tag - Use media-libs/libid3tag for reading files' metadata rather than taglib
net-misc/mediatomb:inotify - Enable inotify filesystem monitoring support
net-misc/mediatomb:lastfm - Enable last.fm support
net-misc/mediatomb:libextractor - Use libextractor to gather files' metadata
net-misc/mediatomb:magic - Use libmagic to determine file types
net-misc/mediatomb:mysql - Use dev-db/mysql as backend rather than SQLite3
net-misc/mediatomb:taglib - Use media-libs/taglib for reading files' metadata rather than id3lib
net-misc/mediatomb:thumbnail - Enables video thumbnails generation throughmedia-video/ffmpegthumbnailer
net-misc/memcached:slabs-reassign - Allow manual reassignment of memory slabs at the cost of slab optimizations.
net-misc/minidlna:netgear - Enable netgear branding
net-misc/minidlna:readynas - Enable readynas branding
net-misc/modemmanager:qmi - Enable support for the QMI modem protocol used by devices with Qualcomm chipsets
net-misc/modemmanager:qmi-newest - Avoid deprecated QMI commands. Warning: may cause incompatibility with older devices.
net-misc/mosh:client - Build network client
net-misc/mosh:examples - Include example scripts
net-misc/mosh:mosh-hardening - Enable compiler and linker options to frustrate memory corruption exploits
net-misc/mosh:server - Build network server
net-misc/mosh:ufw - Install net-firewall/ufw rule set
net-misc/mosh:utempter - Include libutempter support
net-misc/mulk:checksum - Enable checksum verification for Metalink from dev-libs/openssl
net-misc/mulk:metalink - Enable support for media-libs/libmetalink
net-misc/ncp:diet - Compile against dev-libs/dietlibc
net-misc/networkmanager:connection-sharing - Use net-dns/dnsmasq and net-firewall/iptables for connection sharing
net-misc/networkmanager:consolekit - Use sys-auth/consolekit for session tracking
net-misc/networkmanager:dhclient - Use dhclient from net-misc/dhcp for getting ip
net-misc/networkmanager:dhcpcd - Use net-misc/dhcpcd for getting ip
net-misc/networkmanager:modemmanager - Enable support for mobile broadband devices using net-misc/modemmanager
net-misc/networkmanager:nss - Use dev-libs/nss for cryptography
net-misc/networkmanager:ppp - Enable support for mobile broadband and PPPoE connections using net-dialup/ppp
net-misc/networkmanager:resolvconf - Use net-dns/openresolv for managing DNS information
net-misc/networkmanager:vala - Enable bindings for dev-lang/vala
net-misc/networkmanager:wext - Enable support for the deprecated Wext (Wireless Extensions) API; needed for some older drivers (e.g. ipw2200, ndiswrapper)
net-misc/networkmanager:wifi - Enable support for wifi and 802.1x security using net-wireless/wpa_supplicant
net-misc/networkmanager:wimax - Enable support for WiMAX connections using net-wireless/wimax
net-misc/ntp:openntpd - Allow ntp to be installed alongside openntpd
net-misc/ntp:parse-clocks - Add support for PARSE clocks
net-misc/ntp:samba - Provide support for Samba's signing daemon (needed for Active Directory domain controllers)
net-misc/nxcl:nxclient - Use nxssh from net-misc/nxclient instead of standard ssh
net-misc/nxserver-freenx:nxclient - Allow to install net-misc/nxclient in parallel with this package, using it to display messages in the sessions
net-misc/ocsync:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/ofono:atmodem - ETSI AT modem support.
net-misc/ofono:bluetooth - Enable Bluetooth modem support using net-wireless/bluez.
net-misc/ofono:cdmamodem - Enable CDMA modem support.
net-misc/ofono:datafiles - Enable install configuration and data files.
net-misc/ofono:dundee - Enable BlueTooth DUN deamon support.
net-misc/ofono:isimodem - Enable PhoNet/ISI modem support.
net-misc/ofono:phonesim - Enable phone Simulator support
net-misc/ofono:provision - Enable GPRS provisioning support
net-misc/ofono:qmimodem - Enable Qualcomm QMI modem support
net-misc/ofono:tools - Enable testing tools
net-misc/oidentd:masquerade - Enable support for masqueraded/NAT connections
net-misc/openconnect:java - Build JNI bindings using jni.h
net-misc/openconnect:libproxy - Enable proxy support.
net-misc/openssh:X509 - Adds support for X.509 certificate authentication
net-misc/openssh:bindist - Disable EC/RC5 algorithms in OpenSSL for patent reasons.
net-misc/openssh:hpn - Enable high performance ssh
net-misc/openssh:ldap - Add support for storing SSH public keys in LDAP
net-misc/openssh:ldns - Use LDNS for DNSSEC/SSHFP validation.
net-misc/openswan:curl - Include curl support (used for fetching CRLs)
net-misc/openswan:extra-algorithms - Include additional strong algorithms (Blowfish, Twofish, Serpent and SHA2)
net-misc/openswan:ldap - Include LDAP support (used for fetching CRLs)
net-misc/openswan:ms-bad-proposal - Allow bad IP address proposal offered by an Microsoft L2TP/IPSec servers
net-misc/openswan:nocrypto-algorithms - Include algorithms that don't even encrypt (1DES)
net-misc/openswan:nss - Include libnss support (adds smartcard support)
net-misc/openswan:ssl - Use OpenSSL libraries for BIGNUM support
net-misc/openswan:weak-algorithms - Include weak algorithms (DH1)
net-misc/openvpn:down-root - Enable the down-root plugin
net-misc/openvpn:iproute2 - Enabled iproute2 support instead of net-tools
net-misc/openvpn:passwordsave - Enables openvpn to save passwords
net-misc/openvpn:pkcs11 - Enable PKCS#11 smartcard support
net-misc/openvpn:plugins - Enable the OpenVPN plugin system
net-misc/openvpn:polarssl - Use PolarSSL instead of OpenSSL
net-misc/openvswitch:monitor - Build the Python and GUI dependent monitor applications
net-misc/openvswitch:pyside - Use dev-python/pyside instead of dev-python/PyQt4 for Python/Qt-bindings when building with USE=monitor.
net-misc/owncloud-client:sftp - Enable sftp transfer support via net-libs/libssh
net-misc/pavuk:hammer - Turn on chunky/hammer mode (DoS) in pavuk: when specified, pavuk will include features to stress test web sites using an ultrahigh performancereplay mechanism
net-misc/plowshare:scripts - Install some additional helper scripts
net-misc/plowshare:view-captcha - View captcha with aview
net-misc/ps3mediaserver:multiuser - Allow renderer customization per-user.
net-misc/ps3mediaserver:transcode - Install optional dependencies for transcoding support via media-video/mplayer
net-misc/ps3mediaserver:tsmuxer - Install optional dependencies for transcoding support via media-video/tsmuxer
net-misc/putty:gtk - Build the PuTTY client which requires x11-libs/gtk+:2. Otherwise only the CLI tools puttygen, plink, pscp and psftp will be built.
net-misc/quagga:bgpclassless - Apply unofficial patch to enable classless prefixes for BGP. Patch and information to be found at http://hasso.linux.ee/doku.php/english:network:quagga
net-misc/quagga:multipath - Enable multipath routes support for any number of routes
net-misc/quagga:ospfapi - Enable OSPFAPI support for client applications accessing the OSPF link state database
net-misc/quagga:pam - Add support for PAM (via sys-libs/pam) to the Quagga Virtual Terminal Interface Shell (vtysh); if the readline USE flag is disabled, this flag is ignored
net-misc/quagga:readline - Enable support for sys-libs/readline to provide the Quagga Virtual Terminal Interface Shell (vtysh)
net-misc/quagga:tcp-zebra - Enable TCP zserv interface on port 2600 for Zebra/protocol-daemon communication. Unix domain sockets are chosen otherwise
net-misc/rancid-git:git - Enable git (version control system) support
net-misc/rdesktop:kerberos - Enable CredSPP support + Kerberos authentication with net-libs/libgssglue
net-misc/rdesktop:pcsc-lite - Enable smartcard support with sys-apps/pcsc-lite driver
net-misc/remmina:freerdp - Add support for the net-misc/freerdp application
net-misc/remmina:ssh - Enable support for SSH/SFTP protocol; see also 'vte'
net-misc/remmina:telepathy - Enable telepathy support
net-misc/remmina:vte - Enable virtual terminal support (for SSH sessions)
net-misc/rygel:tracker - Install dependencies for the tracker plugin
net-misc/rygel:transcode - Install dependencies for transcoding support
net-misc/scponly:gftp - Enables gFTP compatibility
net-misc/scponly:logging - Enables SFTP logging compatibility
net-misc/scponly:passwd - Enables passwd compatibility
net-misc/scponly:quota - Enables quota compatibility
net-misc/scponly:rsync - Enables rsync compatibility with potential security risks
net-misc/scponly:scp - Enables scp compatibility with potential security risks
net-misc/scponly:sftp - Enables SFTP compatibility
net-misc/scponly:subversion - Enables Subversion compatibility with potential security risks
net-misc/scponly:unison - Enables Unison compatibility with potential security risks
net-misc/scponly:wildcards - Enables wildcard processing with potential security risks
net-misc/scponly:winscp - Enables WinSCP 2.0 compatibility with potential security risks
net-misc/sitecopy:rsh - This allows the use of rsh (remote shell) and rcp (remote copy) for authoring websites. sftp is a much more secure protocol and is preferred.
net-misc/sitecopy:webdav - Enable WebDav (Web-based Distributed Authoring and Versioning) support. This system allows users to collaborate on websites using a web based interface. See the ebuild for an FAQ page. Enables neon as well to handle webdav support.
net-misc/sks:optimize - Enables bytecode optimization
net-misc/slimrat:X - Install also GUI client
net-misc/spice-gtk:dbus - Support for desktop integration such as automounting and other APIs exposed by your DE via D-Bus
net-misc/spice-gtk:gtk3 - Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
net-misc/spice-gtk:policykit - Enable sys-auth/polkit support for the usbredir acl helper
net-misc/spice-gtk:usbredir - Use sys-apps/usbredir to redirect USB devices to another machine over TCP
net-misc/spice-gtk:vala - Generate dev-lang/vala bindings using vapigen and regenerate .vala files using valac
net-misc/stargazer:debug - Enable extra debug codepaths, like asserts and extra output.
net-misc/stargazer:doc - Adds extra documentation (API, doc, etc).
net-misc/stargazer:examples - Install examples, usually source code.
net-misc/stargazer:module_auth_always_online - Enable build of "Always Online" authentication module for Stargazer.
net-misc/stargazer:module_auth_freeradius - Enable build of "Radius" authentication module for Stargazer. This module capable of using RADIUS procotol for user authentication.
net-misc/stargazer:module_auth_internet_access - Enable build of "InetAccess" authentication module for Stargazer. InetAccess is a Stargazer specific authentication protocol.
net-misc/stargazer:module_capture_ether - Enable build of "Ethernet" traffic capture module for Stargazer. This module uses RAW sockets to capture traffic.
net-misc/stargazer:module_capture_ipq - Enable build of "IPQ" traffic capture module for Stargazer. This module uses IPQ subsystem to capture traffic.
net-misc/stargazer:module_capture_netflow - Enable build of "NetFlow" traffic capture module for Stargazer. This module capable of receiving traffic data by NetFlow protocol.
net-misc/stargazer:module_config_rpcconfig - Enable build of "XMLRPC" configuration module for Stargazer. This module uses XML-RPC protocol for configuring Stargazer.
net-misc/stargazer:module_config_sgconfig - Enable build of "SGConf" configuration module for Stargazer. This module uses Stargazer specific protocol for configuring Stargazer.
net-misc/stargazer:module_other_ping - Enable build of "Ping" module for Stargazer. This module pings connected users from time to time to ensure they are alive.
net-misc/stargazer:module_other_remote_script - Enable build of "Remote Script" module for Stargazer. This module control rscriptd daemon over the net and makes it execute scripts in reaction to different Stargazer events.
net-misc/stargazer:module_other_smux - Enable build of SMUX module for Stargazer. This module uses SMUX protocol to provide various information about Stargazer.
net-misc/stargazer:module_store_files - Enable build of storage plugin for Stargazer based on plain files.
net-misc/stargazer:module_store_firebird - Enable build of storage plugin for Stargazer, which uses Firebird database for storage.
net-misc/stargazer:module_store_mysql - Enable build of storage plugin for Stargazer, which uses MySQL for storage.
net-misc/stargazer:module_store_postgres - Enable build of storage plugin for Stargazer, which uses PostgreSQL for storage.
net-misc/stargazer:radius - Enable build of FreeRADIUS module for data access via Stargazer.
net-misc/stargazer:rscriptd - Enable build of remote script execute daemon for Stargazer, which run scripts when receive special signal from Stargazer.
net-misc/stargazer:sgauth - Enable build of command-line utility for authorization in Stargazer.
net-misc/stargazer:sgconf - Enable build of command-line utility for configuring Stargazer.
net-misc/stargazer:sgconf_xml - Enable build of command-line xml-based utility for configuring Stargazer.
net-misc/stargazer:sgconv - Enable build of utility to convert Stargazer data between storage backends.
net-misc/stargazer:stargazer - Enable build of Stargazer billing system.
net-misc/stargazer:static-libs - Install static libraries.
net-misc/streamtuner:shout - Enable shoutcast plug-in.
net-misc/streamtuner:xiph - Enable xiph.org plug-in.
net-misc/strongswan:dhcp - Enable server support for querying virtual IP addresses for clients from a DHCP server. (IKEv2 only)
net-misc/strongswan:eap - Enable support for the different EAP modules that is supported.
net-misc/strongswan:farp - Enable faking of ARP responses for virtual IP addresses assigned to clients. (IKEv2 only)
net-misc/strongswan:gcrypt - Enable dev-libs/libgcrypt plugin which provides 3DES, AES, Blowfish, Camellia, CAST, DES, Serpent and Twofish ciphers along with MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+). Also includes a software random number generator.
net-misc/strongswan:non-root - Force IKEv1/IKEv2 daemons to normal user privileges. This might impose some restrictions mainly to the IKEv1 daemon. Disable only if you really require superuser privileges.
net-misc/strongswan:openssl - Enable dev-libs/openssl plugin which is required for Elliptic Curve Cryptography (DH groups 19-21,25,26) and ECDSA. Also provides 3DES, AES, Blowfish, Camellia, CAST, DES, IDEA and RC5 ciphers along with MD2, MD4, MD5 and SHA1/2 hash algorithms, RSA and DH groups 1,2,5,14-18 and 22-24(4.4+) dev-libs/openssl has to be compiled with USE="-bindist".
net-misc/stunnel:listen-queue - Enable Listen Queue support for Stunnel
net-misc/stunnel:xforward - Enable X-Forwarded-For support for Stunnel
net-misc/teamviewer:system-wine - Use app-emulation/wine instead of bundled one.
net-misc/termpkg:uucp - Adds support for uucp style device locking
net-misc/tigervnc:internal-fltk - Build+link internal and enhanced fltk library
net-misc/tigervnc:server - Build TigerVNC server
net-misc/tigervnc:xorgmodule - Build the Xorg module
net-misc/tightvnc:server - Build vncserver. Allows us to only build server on one machine if set, build only viewer otherwise.
net-misc/tinc:uml - Enable support for User Mode Linux Sockets
net-misc/tinc:vde - Enable Virtual Distributed Ethernet (VDE) based networking
net-misc/tor:bufferevents - Use libevent's buffered IO implementation (unstable, buggy)
net-misc/tor:ecc - Enable Elliptical Curve Cyptography
net-misc/tor:nat-pmp - Enable NAT Port Mapping Protocol
net-misc/tor:stats - Enable to keep track of how much of each kind of resource we download
net-misc/tor:tor-hardening - Compile tor with hardening on vanilla compilers/linkers
net-misc/tor:transparent-proxy - Enable transparent proxying
net-misc/tor:web - Build a tor2web service instead of a tor client
net-misc/uftp:server - Install uftp server daemon
net-misc/vde:pcap - Enable the pcap-based plugin that allows creating a switch against a real interface.
net-misc/vde:ssl - Enable the cryptcab plugin that allows creating an encrypted virtual cable.
net-misc/vidalia:tor - Allow to use a local tor setup
net-misc/vinagre:applet - Enable vinagre applet for gnome-base/gnome-panel
net-misc/vinagre:rdp - Enable access to Windows RDP protocol using net-misc/rdesktop
net-misc/vinagre:spice - Enable access to SPICE-enabled virtual machines
net-misc/vinagre:ssh - Enable ssh plugin using x11-libs/vte
net-misc/vinagre:telepathy - Enable access to remote desktop via a net-libs/telepathy-glib client
net-misc/vino:telepathy - Enable desktop sharing through a telepathy client
net-misc/vpnc:bindist - Using GnuTLS for SSL support as redistribution with OpenSSL as provider violates GPL
net-misc/vpnc:resolvconf - Enable support for DNS managing framework net-dns/openresolv
net-misc/wget:ntlm - Enable support for NTLM (Windows-based) authorization
net-misc/wget:uuid - Generate UUIDs for the WARC (Web ARChive file format) using libuuid; otherwise use a simple RNG (random number generator)
net-misc/wicd:ambiance - Install icons from Ubuntu's ambiance theme
net-misc/wicd:gtk - Installs a gtk UI. This is enabled by default because it is intended behavior. Requires dev-python/pygtk
net-misc/wicd:ioctl - Installs additional python libraries to use as a backend. This will improve speed but is experimental.
net-misc/wicd:mac4lin - Change default icons to mac4lin icon set
net-misc/wicd:ncurses - Installs a ncurses UI
net-misc/wicd:pm-utils - Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils
net-misc/x2goserver:fuse - Use sys-fs/sshfs-fuse to allow shared folders
net-misc/yaydl:soundextract - Extract the soundtracks of the downloaded videos
net-nds/389-ds-base:auto-dn-suffix - Enable auto bind with auto dn suffix over unix domain socket (LDAPI) support
net-nds/389-ds-base:autobind - Enable auto bind over unix domain socket (LDAPI) support
net-nds/389-ds-base:bitwise - Enable bitwise plugin - supported data in raw/bitwise format
net-nds/389-ds-base:dna - Enable dna (distributed numeric assignment ) plugin - to automatically assign unique uid numbers to new user entries as they are created.
net-nds/389-ds-base:ldapi - Enable LDAP over unix domain socket (LDAPI) support
net-nds/389-ds-base:pam-passthru - Enable pam-passthru plugin - for simple and fast system services used in ldap
net-nds/389-ds-base:presence - Enable presence plugin - non-stabdart syntax validation
net-nds/gosa-core:mail - Manage mail accounts and servers with gosa.
net-nds/gosa-core:samba - Manage samba accounts with gosa.
net-nds/ldapvi:gnutls - Use net-libs/gnutls instead of dev-libs/openssl
net-nds/nsscache:nsscache - Depend on sys-auth/libnss-cache to handle flat files
net-nds/nsscache:nssdb - Depend on sys-libs/libnss_db to handle dbm files.
net-nds/openldap:experimental - Enable experimental backend options
net-nds/openldap:minimal - Build libraries & userspace tools only. Does not install any server code.
net-nds/openldap:odbc - Enable ODBC and SQL backend options
net-nds/openldap:overlays - Enable contributed OpenLDAP overlays
net-nds/openldap:smbkrb5passwd - Enable overlay for syncing ldap, unix and lanman passwords
net-nds/rpcbind:warmstarts - Enables rpcbind to cache configuration for warm restarts
net-nds/tac_plus:finger - Adds support for checking user counts via fingering the NAS
net-nds/tac_plus:maxsess - Enforce a limit on maximum sessions per user
net-news/liferea:libnotify - Enable popup notifications
net-news/quiterss:phonon - Enable sound support via media-libs/phonon or dev-qt/qtphonon
net-nntp/inn:innkeywords - Enable automatic keyword generation support
net-nntp/inn:inntaggedhash - Use tagged hash table for history (disables large file support)
net-nntp/nzbget:parcheck - Enable support for checking PAR archives
net-nntp/sabnzbd:rar - Add support for extracting rar files
net-nntp/sabnzbd:ssl - Add support for SSL web interface
net-nntp/sabnzbd:unzip - Add support for extracting zip files
net-nntp/sabnzbd:yenc - Use yenc to speed up nntp encoding and decoding
net-nntp/slrn:canlock - Add support for cancel locks via net-libs/canlock
net-nntp/slrn:uudeview - Add support for yEnc coding and more using dev-libs/uulib
net-nntp/tin:cancel-locks - Enable Cancel-Lock header functionality (also enables USE=evil)
net-nntp/tin:etiquette - Enable the display off posting etiquettes
net-nntp/tin:evil - Let tin generate a message ID
net-nntp/tin:forgery - Cancel messages posted from a different account
net-nntp/tin:gpg - Enable app-crypt/gpg support
net-p2p/amule:daemon - Enable amule daemon
net-p2p/amule:remote - Enable remote controlling of the client
net-p2p/amule:stats - Enable statistic reporting
net-p2p/bitcoin-qt:1stclassmsg - Enable first-class Bitcoin message tools
net-p2p/bitcoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/bitcoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/datacoin-hp:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/dbhub:switch_user - Enable support for switching user
net-p2p/deluge:setproctitle - Install dependencies needed for beautifying the process name
net-p2p/deluge:webinterface - Install dependencies needed for the web interface
net-p2p/dogecoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/eiskaltdcpp:cli - Enable sample cli based on readline
net-p2p/eiskaltdcpp:daemon - Enable eiskaltdcpp-daemon
net-p2p/eiskaltdcpp:dht - Enable DHT (distributed hash table) support for libeiskaltdcpp
net-p2p/eiskaltdcpp:emoticons - Install emoticon packs
net-p2p/eiskaltdcpp:json - Enable JSON for cli and daemon
net-p2p/eiskaltdcpp:libcanberra - Enable sound notifications support over libcanberra in EiskaltDC++ Gtk
net-p2p/eiskaltdcpp:minimal - Don't install headers
net-p2p/fms:frost - Add support for frost boards
net-p2p/gift:ares - pull in Ares plugin
net-p2p/gift:fasttrack - pull in FastTrack plugin
net-p2p/gift:gnutella - pull in Gnutella plugin
net-p2p/gift:openft - pull in OpenFT plugin
net-p2p/ktorrent:bwscheduler - Schedule upload and download limits over a period of a week
net-p2p/ktorrent:downloadorder - Specify the download order of a multi-file torrent
net-p2p/ktorrent:infowidget - Displays general information about a torrent in several tabs
net-p2p/ktorrent:ipfilter - Filter IP addresses through a blocklist
net-p2p/ktorrent:kross - Enable kross scripting support
net-p2p/ktorrent:logviewer - Displays the logging output
net-p2p/ktorrent:magnetgenerator - Generates magnet URI's
net-p2p/ktorrent:mediaplayer - Phonon-based media player
net-p2p/ktorrent:rss - Syndication plugin for KTorrent, supporting RSS and Atom feeds
net-p2p/ktorrent:scanfolder - Scan folders for torrent files and load them
net-p2p/ktorrent:search - Search for torrents
net-p2p/ktorrent:shutdown - Shutdown when done
net-p2p/ktorrent:stats - Shows statistics about torrents in several graphs
net-p2p/ktorrent:webinterface - Allows control of KTorrent via a web interface
net-p2p/ktorrent:zeroconf - Discover peers on the local network using the Zeroconf protocol
net-p2p/litecoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/litecoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/mldonkey:bittorrent - enable bittorrent support
net-p2p/mldonkey:fasttrack - enable fasttrack support
net-p2p/mldonkey:gnutella - enable gnutella and gnutella2 support
net-p2p/mldonkey:guionly - enable client build only
net-p2p/mldonkey:magic - enable use of libmagic
net-p2p/ppcoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/ppcoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/primecoin-qt:qrcode - Enable generation of QR Codes for receiving payments
net-p2p/primecoind:logrotate - Use app-admin/logrotate for rotating logs
net-p2p/retroshare:cli - Enables the CLI version of RetroShare
net-p2p/retroshare:feedreader - Enables the Feedreader plugin
net-p2p/retroshare:links-cloud - Enables LinkClouds plugin
net-p2p/retroshare:qt4 - Enables the GUI using qt4
net-p2p/retroshare:voip - Enables VOIP plugin
net-p2p/rtorrent:color - Add custom color support for torrent list
net-p2p/rtorrent:daemon - Uses app-misc/screen to daemonize this application
net-p2p/transmission:lightweight - Optimize transmission for low-resource systems (smaller cache size, prefer unencrypted peer connections, etc.)
net-p2p/transmission:xfs - Enable XFS filesystem capabilities by using sys-fs/xfsprogs headers (in building of fdlimit(.c))
net-p2p/transmission-remote-cli:rdns - Enable support for host name resolution
net-p2p/transmission-remote-gtk:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration.
net-p2p/transmission-remote-gtk:unique - Enable single instance support using dev-libs/libunique
net-p2p/tribler:vlc - Enable vlc support.
net-print/cups:java - Add support for the Java interpeter in the web server CGIs.
net-print/cups:lprng-compat - Do not install lp... binaries so cups and lprng can coexist.
net-print/cups:python - Add support for the Python interpeter in the web server CGIs.
net-print/cups-filters:foomatic - Build the included foomatic-rip printer driver. Strongly recommended.
net-print/fax4cups:capisuite-fax - Install net-dialup/capisuite backend
net-print/fax4cups:efax - Install net-misc/efax backend
net-print/fax4cups:hylafax - Install net-misc/hylafax backend
net-print/fax4cups:mgetty-fax - Install net-dialup/mgetty backend
net-print/hplip:X - Enables scanner GUI dependencies with USE="scanner" where media-gfx/xsane is preferred over media-gfx/sane-frontends
net-print/hplip:doc - Build documentation
net-print/hplip:fax - Enable fax on multifunction devices which support it
net-print/hplip:hpcups - Build the hpcups driver for cups (by HP)
net-print/hplip:hpijs - Build the IJS driver for cups (Foomatic)
net-print/hplip:kde - Enables kde-misc/skanlite as scanner GUI with USE="scanner X"
net-print/hplip:libnotify - Enables desktop notifications
net-print/hplip:libusb0 - Depend on virtual/libusb:0. Some old printers do not work with virtual/libusb:1
net-print/hplip:minimal - Only build internal hpijs/hpcups driver (not recommended at all, make sure you know what you are doing)
net-print/hplip:parport - Enable parallel port for devices which require it
net-print/hplip:qt4 - Enable graphical interface using Qt 4
net-print/hplip:scanner - Enable scanner on multifunction devices which support it
net-print/hplip:snmp - Add support for net-analyzer/net-snmp which enables this driver to work over networks (both for server and client)
net-print/hplip:static-ppds - Use statically-generated PPDs instead of Dynamic PPDs. Although this is deprecated some printers may still need it to work properly. Use this flag if hp-setup fails to find/create a valid PPD file
net-print/magicfilter:lprng-failsafe - Refuse options for compability with certain LPRng versions.
net-proxy/dansguardian:avast - Enable support for the AvastD content scanner.
net-proxy/dansguardian:backtrace - Enable logging a backtrace when a segmentation fault occurs.
net-proxy/dansguardian:clamav - Enable support for the ClamD content scanner.
net-proxy/dansguardian:commandline - Enable support for command-line content scanners.
net-proxy/dansguardian:email - Enable support for email reporting functionality.
net-proxy/dansguardian:fancydm - Enable support for the fancy download manager.
net-proxy/dansguardian:icap - Enable support for ICAP AV server content scanner.
net-proxy/dansguardian:kaspersky - Enable support for the Kaspersky AV daemon content scanner.
net-proxy/dansguardian:lfs - Enable large file support on 32 bit systems.
net-proxy/dansguardian:logrotate - Use app-admin/logrotate for rotating logs.
net-proxy/dansguardian:ntlm - Enable support for the NTLM auth plugin.
net-proxy/dansguardian:orig-ip - Enable support for checking the client's original destination IP address against HTTP request details when deployed as a transparent proxy (US-CERT VU#435052).
net-proxy/dansguardian:trickledm - Enable support for the trickle download manager.
net-proxy/haproxy:tools - Install additional tools (halog, iprange).
net-proxy/obfsproxy:daemon - Run obfsproxy as a standalone daemon
net-proxy/rejik:banlists - Install upstream provided simple banlists
net-proxy/squid:ecap - Adds support for loadable content adaptation modules (http://www.e-cap.org)
net-proxy/squid:epoll - Enables Linux epoll() support
net-proxy/squid:esi - Enable ESI for accelerators, will cause squid reverse proxies to be capable of the Edge Acceleration Specification (www.esi.org)
net-proxy/squid:htcp - Enable HTCP protocol
net-proxy/squid:icap-client - Adds ICAP client support
net-proxy/squid:ipf-transparent - Adds transparent proxy support for systems using IP-Filter (only for *bsd)
net-proxy/squid:kqueue - Enables *BSD kqueue() support
net-proxy/squid:logrotate - Use app-admin/logrotate for rotating logs
net-proxy/squid:pf-transparent - Adds transparent proxy support for systems using PF (only for *bsd)
net-proxy/squid:qos - Adds support for Quality of Service using netfilter conntrack - see qos_flow directive for more info
net-proxy/squid:ssl-crtd - Adds support for dynamic SSL certificate generation in SslBump environments
net-proxy/squid:tproxy - Enables real Transparent Proxy support for Linux Netfilter TPROXY
net-proxy/squid:wccp - Enable Web Cache Coordination Protocol
net-proxy/squid:wccpv2 - Enable Web Cache Coordination V2 Protocol
net-proxy/squid:zero-penalty-hit - Add Zero Penalty Hit patch (http://zph.bratcheda.org)
net-proxy/sshproxy:client-only - Install only the client wrappers
net-proxy/tinyproxy:filter-proxy - Enable filtering of domains/URLS
net-proxy/tinyproxy:reverse-proxy - Enable reverse proxying
net-proxy/tinyproxy:transparent-proxy - Enable transparent proxying
net-proxy/tinyproxy:upstream-proxy - Enable upstream proxying
net-proxy/tinyproxy:xtinyproxy-header - Include the X-Tinyproxy header
net-proxy/tsocks:tordns - Apply tordns patch which allows transparent TORification of the DNS queries
net-proxy/ufdbguard:doc - Download and install the ufdbguard reference manual in PDF.
net-proxy/ufdbguard:httpd - Build, install and start the provided mini-http daemon with the redirect CGI integrated. Since there is no way to tell ufdbguard to not start it, this is a build-time option.
net-voip/ekiga:gconf - Enable GConf support
net-voip/ekiga:h323 - Enable H.323 protocol
net-voip/ekiga:shm - Enable the Shared Memory Extension from libXext
net-voip/ekiga:static - Statically link to opal and ptlib
net-voip/ekiga:xcap - Enable XML Configuration Access Protocal
net-voip/gnugk:ssh - Enable support for SSH port forwarding using net-libs/libssh
net-voip/linphone:assistant - Turn on assistant compiling (needs gtk enabled)
net-voip/linphone:gsm-nonstandard - Support non-standard GSM frequencies
net-voip/linphone:sqlite - Turn on compilation of message storage
net-voip/linphone:tools - Compile tools
net-voip/linphone:video - Enable video support (display/capture)
net-voip/sflphone:doxygen - Support for building documentation with doxygen
net-voip/yate:dahdi - Enable the DAHDI driver for Digium compatible hardware
net-voip/yate:h323 - Build H.323 Channel plugin
net-voip/yate:ilbc - Build ILBC codec plugin
net-voip/yate:sctp - Support for Stream Control Transmission Protocol
net-voip/yate:spandsp - Enable support for the spandsp codec
net-wireless/aircrack-ng:airdrop-ng - Build airdrop-ng
net-wireless/aircrack-ng:airgraph-ng - Build airgraph-ng
net-wireless/aircrack-ng:netlink - Use netlink for channel control instead of WEXT
net-wireless/aircrack-ng:unstable - Build the "unstable" tools which may randomly fail to run properly
net-wireless/blueman:gconf - Enable the GConf configuration backend
net-wireless/blueman:network - Add functionality to setup (host) PAN connections using either net-dns/dnsmasq or net-misc/dhcp
net-wireless/blueman:sendto - Install the sendto-plugin for gnome-base/nautilus
net-wireless/bluez:hid2hci - The HID proxying makes the keyboard / mouse show up as regular USB HID devices, but needs them to be paired before enabling this, otherwise they won't be detected
net-wireless/bluez:obex - Enable OBEX transfer support.
net-wireless/bluez:test-programs - Install tools for testing of various Bluetooth functions
net-wireless/gnome-bluetooth:nautilus - Build the gnome-extra/nautilus-sendto plugin
net-wireless/gnuradio:analog - enable analog signal processing blocks
net-wireless/gnuradio:digital - enable digital signal processing blocks
net-wireless/gnuradio:fcd - enable Funcube Dongle source block
net-wireless/gnuradio:filter - enable filter signal processing blocks
net-wireless/gnuradio:grc - enable GNU Radio Companion graphical tool to design signal processing flow graphs
net-wireless/gnuradio:pager - enable pager signal processing blocks
net-wireless/gnuradio:performance-counters - enable block performance counters
net-wireless/gnuradio:uhd - install UHD source and sink blocks
net-wireless/gnuradio:utils - install scripts to enable viewing and analysis of files produced by flow graphs
net-wireless/gnuradio:wavelet - enable wavelet signal processing blocks
net-wireless/gr-osmosdr:fcd - Build with Funcube Dongle support
net-wireless/gr-osmosdr:hackrf - Build with Great Scott Gadgets "HackRF" support
net-wireless/gr-osmosdr:iqbalance - Enable support for I/Q balancing using gr-iqbal
net-wireless/gr-osmosdr:mirisdr - Build with Mirics MSi2500 + MSi001 SDR support
net-wireless/gr-osmosdr:rtlsdr - Build with Realtek RTL2832U (rtlsdr) support
net-wireless/gr-osmosdr:uhd - Build with Ettus Research USRP Hardware Driver support
net-wireless/hostapd:crda - Add CRDA support
net-wireless/hostapd:logwatch - Install support files for sys-app/logwatch
net-wireless/hostapd:madwifi - Add support for madwifi (Atheros chipset)
net-wireless/hostapd:wps - Add support for Wi-Fi Protected Setup
net-wireless/kismet:client - Build the ncurses-based user interface
net-wireless/kismet:pcre - Build with pcre support
net-wireless/kismet:plugin-autowep - Build the autowep plugin
net-wireless/kismet:plugin-btscan - Build the btscan plugin
net-wireless/kismet:plugin-dot15d4 - Build the dot15d4 plugin
net-wireless/kismet:plugin-ptw - Build the ptw plugin
net-wireless/kismet:plugin-spectools - Build the spectools plugin. This uses net-wireless/spectools
net-wireless/kismet:plugin-syslog - Build the syslog plugin.
net-wireless/kismet:ruby - Build extras which are written in ruby, example plugins and the like.
net-wireless/kismet:speech - Audio support using app-accessibility/flite
net-wireless/kismet:suid - Install a setuid root helper binary with limited functionality; this allows running kismet as a normal user, significantly reducing security risks
net-wireless/madwifi-ng:injection - Adds support for net-wireless/aircrack-ng aireplay-ng packet injection
net-wireless/neard:tools - build and install extra helper utilities
net-wireless/pyrit:cuda - Enable CUDA support via net-wireless/cpyrit-cuda
net-wireless/pyrit:opencl - Enable OpenCL support via net-wireless/cpyrit-opencl
net-wireless/spectools:debug - Build the raw output client for spectools. (for developers)
net-wireless/spectools:gtk - Build the gtk-2 based client for spectools
net-wireless/spectools:ncurses - Build the ncurses based client for spectools
net-wireless/ubertooth:clock_debug - support for clock following an existing local bluetooth connection with bluez
net-wireless/ubertooth:dfu - Install ubertooth-dfu (needed for read/write of firmware)
net-wireless/ubertooth:specan - Enable the ubertooth spectrum analyzer
net-wireless/ubertooth:ubertooth0-firmware - Build/install ubertooth0-firmware
net-wireless/ubertooth:ubertooth1-firmware - Build/install ubertooth1-firmware
net-wireless/wepattack:john - Build with app-crypt/johntheripper support
net-wireless/wireless-tools:multicall - Build the most commonly used tools as one binary
net-wireless/wpa_supplicant:ap - Add support for access point mode
net-wireless/wpa_supplicant:eap-sim - Add support for EAP-SIM authentication algorithm
net-wireless/wpa_supplicant:fasteap - Add support for FAST-EAP authentication algorithm
net-wireless/wpa_supplicant:p2p - Add support for Wi-Fi Direct mode
net-wireless/wpa_supplicant:ps3 - Add support for ps3 hypervisor driven gelic wifi
net-wireless/wpa_supplicant:smartcard - Add support for smartcards
net-wireless/wpa_supplicant:wimax - Add support for Wimax EAP-PEER authentication algorithm
net-wireless/wpa_supplicant:wps - Add support for Wi-Fi Protected Setup
razorqt-base/razorqt-meta:lightdm - Install x11-misc/lightdm display manager and Razor-qt's LightDM greeter
razorqt-base/razorqt-panel:clock - Add clock panel applet
razorqt-base/razorqt-panel:colorpicker - Add colorpicker panel applet
razorqt-base/razorqt-panel:cpuload - Add CPU load panel applet; depends on sys-libs/libstatgrab
razorqt-base/razorqt-panel:desktopswitch - Add desktop switch panel applet
razorqt-base/razorqt-panel:mainmenu - Add main menu panel applet
razorqt-base/razorqt-panel:mount - Add external storage mounting panel applet; depends on sys-fs/udisks
razorqt-base/razorqt-panel:networkmonitor - Add network monitor panel applet; depends on sys-libs/libstatgrab
razorqt-base/razorqt-panel:quicklaunch - Add quicklaunch panel applet
razorqt-base/razorqt-panel:screensaver - Add screensaver panel applet
razorqt-base/razorqt-panel:sensors - Add sensors panel applet; depends on sys-apps/lm_sensors
razorqt-base/razorqt-panel:showdesktop - Add show desktop panel applet
razorqt-base/razorqt-panel:taskbar - Add taskbar panel applet
razorqt-base/razorqt-panel:tray - Add system tray panel applet
razorqt-base/razorqt-panel:volume - Add volume mixer panel applet; depends on either media-libs/alsa-lib or media-sound/pulseaudio
rox-base/rox:video - Enable rox-extra/videothumbnail for creating thumbnails of videos with mplayer or totem.
rox-extra/archive:ace - Enable .ace extraction via app-arch/unace
rox-extra/archive:compress - Enable tar.Z and *.Z extraction via app-arch/ncompress
rox-extra/archive:cpio - Enable .cpio extraction via app-arch/cpio
rox-extra/archive:rar - Enable .rar extraction via app-arch/unrar
rox-extra/archive:rpm - Enable .rpm extraction via rpm2cpio from app-arch/rpm
rox-extra/archive:uuencode - Enable .uue extraction via app-arch/sharutils
rox-extra/archive:zip - Enable .zip extraction via app-arch/unzip and app-arch/zip
rox-extra/magickthumbnail:xcf - Enable previews of .xcf files using media-gfx/gimp
sci-astronomy/casacore:data - Installs measures and data (pulls sci-astronomy/casa-data)
sci-astronomy/cpl:gasgano - Enable support for sci-astronomy/gasgano file organizer
sci-astronomy/predict:xforms - Add a "map" client which uses the x11-libs/xforms library for its GUI
sci-astronomy/predict:xplanet - Project predict data onto world maps generated by x11-misc/xplanet / x11-misc/xearth
sci-astronomy/stellarium:sound - Enable sound support
sci-astronomy/stellarium:stars - Install extra star catalogs
sci-astronomy/wcslib:fits - Enable support for the FITS format through sci-libs/cfitsio
sci-astronomy/wcslib:pgplot - Builds PGBSOX routines, needs sci-libs/pgplot library
sci-biology/bioperl:db - Install sci-biology/bioperl-run
sci-biology/bioperl:network - Install sci-biology/bioperl-run
sci-biology/bioperl:run - Install sci-biology/bioperl-run
sci-biology/clustalw-mpi:mpi_njtree - Use MPI (as opposed to serial) code for computing neighbor-joining trees
sci-biology/clustalw-mpi:static_pairalign - Use static (as opposed to dynamic) scheduling for pair alignments
sci-biology/exonerate:utils - Install all utilities
sci-biology/fasttree:double-precision - use double precision instead of single-precision floating point (2x memroy required)
sci-biology/gmap:goby - Enable support for goby
sci-biology/gmap:samtools - Enable support for samtools
sci-biology/goby:cpp - Compile C/C++ API
sci-biology/hmmer:pvm - Add support for parallel virtual machine (sys-cluster/pvm)
sci-biology/mcl:blast - add support for NCBI BLAST data
sci-biology/plink:R - add support R language
sci-biology/plink:webcheck - add support for online update checking every time the program starts
sci-biology/raxml:sse3 - Enable optimization for SSE3 capable chips
sci-biology/tophat:bam - Compile support for the BAM format
sci-biology/ucsc-genome-browser:server - Install genome browser Web application. If this flag is off, only libraries and utilities from the suite are installed.
sci-biology/yass:dmalloc - Enable debugging with the dmalloc library
sci-biology/yass:lowmem - Build for environments with low amounts of memory
sci-chemistry/PyMca:matplotlib - Support for plotting through matplotlib
sci-chemistry/apbs:arpack - Include support for arpack libs
sci-chemistry/apbs:fetk - Include support for FeTK
sci-chemistry/apbs:tools - Install optional tools
sci-chemistry/avogadro:glsl - Enable glsl features via GLEW.
sci-chemistry/ball:cuda - Include cuda support
sci-chemistry/ball:sql - Include SQL database support
sci-chemistry/ball:webkit - Uses dev-qt/qtwebkit for drawing
sci-chemistry/ccp4:arpwarp - Add binary arp-warp for molecular replacement
sci-chemistry/ccp4:balbes - Install sci-chemistry/balbes
sci-chemistry/chemtool:emf - EMF export support
sci-chemistry/cns:aria - Support patch for sci-chemistry/aria
sci-chemistry/eden:double-precision - More precise calculations at the expense of speed
sci-chemistry/gamess:neo - Enable NEO for nuclear basis support
sci-chemistry/gamess:pax_kernel - Make this package work on PAX kernels
sci-chemistry/gamess:qmmm-tinker - Enable tinker qmmm code
sci-chemistry/ghemical:openbabel - Use sci-chemistry/openbabel for file conversions
sci-chemistry/ghemical:toolbar - Build the shortcuts toolbar
sci-chemistry/gromacs:avx128fma - Enable 128bit avx with fma (e.g. AMD BullDozer)
sci-chemistry/gromacs:avx256 - Enable 256bit avx (e.g. Intel Sandy Bridge)
sci-chemistry/gromacs:cuda - Enable cuda non-bonded kernels
sci-chemistry/gromacs:double-precision - More precise calculations at the expense of speed
sci-chemistry/gromacs:mkl - Use sci-libs/mkl for fft, blas, lapack routines
sci-chemistry/gromacs:offensive - Enable gromacs partly offensive quotes
sci-chemistry/gromacs:openmm - Add acceleration through sci-libs/openmm
sci-chemistry/gromacs:single-precision - Single precision version of gromacs (default)
sci-chemistry/gromacs:sse4_1 - Enable sse4.1 acceleration
sci-chemistry/gsim:emf - Support for .emf export
sci-chemistry/icm:32bit - Automatically generated description for 32bit
sci-chemistry/icm:64bit - Automatically generated description for 64bit
sci-chemistry/jmol:client-only - Install the viewer only, no applet files for httpd
sci-chemistry/molequeue:client - Build the client application
sci-chemistry/molequeue:server - Build the serve application
sci-chemistry/molequeue:zeromq - Build with net-libs/zeromq support
sci-chemistry/mopac7:gmxmopac7 - Add support library for gromacs
sci-chemistry/oasis:minimal - Restricts functionality on free software
sci-chemistry/openbabel:swig - Use swig to rebuild language bindings.
sci-chemistry/pdb2pqr:opal - Add web interface via opal
sci-chemistry/pdb2pqr:pdb2pka - Install experimental pdb2pka interface
sci-chemistry/pymol:apbs - Install the apbs plugin
sci-chemistry/pymol:numpy - Compile numpy support
sci-chemistry/pymol:vmd - Enable vmd module for trajectories
sci-chemistry/pymol:web - Install Pymodule needed for web app support
sci-chemistry/raster3d:gd - libgd support for PNG and JPEG output
sci-chemistry/shelx:dosformat - Use CR/LF to end lines; useful in mixed Linux/Windows environments
sci-chemistry/vmd:cuda - Use nvidia cuda toolkit for speeding up computations
sci-chemistry/vmd:msms - Add support for MSMS SAS calcualtion tool
sci-chemistry/vmd:povray - Add support for povray raytracer for HQ images
sci-chemistry/vmd:tachyon - Add support for tachyon raytracer for HQ images
sci-chemistry/votca-csg:extras - Pull in extra applications from sci-chemistry/votca-csg-apps
sci-chemistry/votca-csg:gromacs - Add support for gromacs file formats through sci-chemistry/gromacs
sci-chemistry/votca-csg:system-boost - Use system boost (dev-libs/boost) instead of bundled one
sci-chemistry/wxmacmolplt:flash - Add support for flash movie generation using media-libs/ming
sci-electronics/geda:stroke - enable mouse gesture support
sci-electronics/gerbv:unit-mm - Set default unit for coordinates in status bar to mm
sci-electronics/gspiceui:schematics - Use sci-electronics/geda for schematics editing
sci-electronics/gspiceui:waveform - Use sci-electronics/gwave for waveform display
sci-electronics/gtkwave:fasttree - Enables experimental Fast SST Tree widget code.
sci-electronics/gtkwave:fatlines - Renders lines as double width in gtkwave.
sci-electronics/gtkwave:judy - Enables Judy array support.
sci-electronics/gtkwave:packed - Enables '#pragma pack' for data arrays (saves memory, costs time).
sci-electronics/pcb:gcode - gcode file export
sci-electronics/pcb:gif - GIF graphics export
sci-electronics/pcb:jpeg - JPEG graphics export
sci-electronics/pcb:m4lib-png - Enable creating png previews for the m4 library
sci-electronics/pcb:nelma - NELMA file export
sci-electronics/pcb:png - PNG graphics export
sci-electronics/pcb:tk - Build tcl/tk graphical QFP footprint generator
sci-electronics/pcb:toporouter - Build toporouter
sci-electronics/pcb:xrender - Translucent PCB display for Motif/Lesstif GUI
sci-geosciences/geocode-glib:introspection - Use dev-libs/gobject-introspection for introspection
sci-geosciences/gmt:gdal - Enable sci-libs/gdal library support
sci-geosciences/gmt:gmtfull - Full resolution bathymetry database
sci-geosciences/gmt:gmthigh - Add high resolution bathymetry database
sci-geosciences/gmt:gmttria - Non GNU triangulation method, more efficient
sci-geosciences/gmt:metric - Use SI (cm) units instead of US (inches) ones
sci-geosciences/gmt:mex - Enable compilation of mex supplement which requires Octave/Matlab
sci-geosciences/gmt:octave - Enable octave support
sci-geosciences/googleearth:bundled-libs - Use bundled libraries.
sci-geosciences/gpsd:dbus - export gpsd data over dbus connections
sci-geosciences/gpsd:latency_timing - support latency timing information
sci-geosciences/gpsd:ntp - Enable net-misc/ntp shared memory interface and PPS kernel support for GPS time
sci-geosciences/gpsd:shm - export gpsd over shared memory
sci-geosciences/gpsd:sockets - export gpsd over unix sockets
sci-geosciences/grass:gmath - Enable gmath wrapper for BLAS/Lapack (virtual/blas, virtual/lapack)
sci-geosciences/gshhs:data - Add earth data with sci-geosciences/gshhs-data
sci-geosciences/mapnik:gdal - Enable sci-libs/gdal library support
sci-geosciences/mapnik:geos - Enable sci-libs/geos library support
sci-geosciences/mapserver:gdal - Enable sci-libs/gdal library support
sci-geosciences/mapserver:geos - Enable sci-libs/geos library support
sci-geosciences/mapserver:postgis - Enable dev-db/postgis support
sci-geosciences/mapserver:proj - Enable sci-libs/proj library support (geographic projections)
sci-geosciences/mapserver:xslt - Enable xslt and exslt support xml-mapfile support
sci-geosciences/merkaartor:libproxy - Use net-libs/libproxy for getting the HTTP/HTTPS/SOCKS proxy configuration
sci-geosciences/merkaartor:webkit - Enable Webkit browser plugin using dev-qt/qtwebkit
sci-geosciences/osm2pgsql:pbf - Add support for importing the new "Protocolbuffer Binary Format"
sci-geosciences/qgis:bundled-libs - Use internal copy of x11-libs/qwtpolar
sci-geosciences/qgis:grass - Add support for sci-geosciences/grass
sci-geosciences/qgis:spatialite - Enable Spatial DBMS over sqlite dev-db/spatialite
sci-geosciences/qlandkartegt:dmtx - Enable libdmtx support for summarizing waypoints as 2D barcode
sci-geosciences/qlandkartegt:gpsbabel - Enable support for wide range of geodata file formats
sci-geosciences/qlandkartegt:gpx-extensions - Enable support for GPX extensions
sci-geosciences/qlandkartegt:mikrokopter - Enable telemtry with a mikrokopter
sci-geosciences/qlandkartegt:rmap - Enable support for TwoNav RMAP file format
sci-geosciences/xtide:gps - Use sci-geosciences/gpsd
sci-libs/acml:gfortran - Fetch and install acml compiled with GNU gfortran
sci-libs/acml:ifc - Fetch and install acml compiled with Intel Fortran Compiler (dev-lang/ifc)
sci-libs/acml:int64 - Install the 64 bits integer library
sci-libs/adolc:sparse - Add support for sparse matrix algebra with sci-libs/colpack
sci-libs/arprec:fma - Use the Fused Multiply Add instruction set
sci-libs/arprec:qd - Use sci-libs/qd for quad-double datatype
sci-libs/avogadrolibs:static-plugins - build all plugins statically into main plugin modules
sci-libs/avogadrolibs:vtk - include vtk support
sci-libs/ceres-solver:cxsparse - Enable simple support for sparse matrix algebra from sci-libs/cxsparse with no LAPACK dependencies
sci-libs/ceres-solver:gflags - Use dev-cpp/gflags for flag parsing
sci-libs/ceres-solver:metis - Use METIS via sci-libs/cholmod for matrix partitioning
sci-libs/ceres-solver:protobuf - Use dev-libs/protobuf to encode structured data
sci-libs/ceres-solver:schur - Enable fixed-size schur specializations (disable if binary size is an issue)
sci-libs/ceres-solver:sparse - Enable support for sparse matrix algebra with various packages from SuiteSparse
sci-libs/cfitsio:tools - Build execs fpack, funpack, imcopy, fitscopy, listhead
sci-libs/chemkit:applications - Build also applications not only the libraries
sci-libs/cholmod:cuda - Use nvidia cuda toolkit for speeding up computations
sci-libs/cholmod:metis - Enable the Partition module to cholmod using sci-libs/metis
sci-libs/cholmod:supernodal - Enable the Supernodal module (needs virtual/lapack)
sci-libs/coinor-bonmin:glpk - Undocumented USE
sci-libs/coinor-clp:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/coinor-clp:metis - Enable partitioning with sci-libs/metis
sci-libs/coinor-clp:mumps - Enable sci-libs/mumps support
sci-libs/coinor-clp:sparse - Enable support for sparse matrix with sci-libs/cholmod
sci-libs/coinor-osi:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/coinor-symphony:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/coinor-utils:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/fftw:avx - Adds support for Advanced Vector Extensions
sci-libs/fftw:float - Link default library to single precision instead of double (symlinks only and fftw-2.1)
sci-libs/fftw:fma - Use the Fused Multiply Add instruction set (fma3/fma4 either one)
sci-libs/fftw:quad - Build quadruple precision lib
sci-libs/fftw:zbus - Adds support for ZBus cycle-counter of mips
sci-libs/flann:cuda - Enable support for nVidia CUDA
sci-libs/flann:octave - Add bindings for sci-mathematics/octave
sci-libs/gdal:armadillo - Use sci-libs/armadillo for faster TPS transform computation
sci-libs/gdal:aux_xml - Enable Portable Auxilliary Metadata generation
sci-libs/gdal:ecwj2k - Enable support for alternate jpeg2k library sci-libs/libecwj2
sci-libs/gdal:fits - Enable support for NASA's sci-libs/cfitsio library
sci-libs/gdal:geos - Add support for geometry engine (sci-libs/geos)
sci-libs/gdal:gml - Enable support for dev-libs/xerces-c C++ API
sci-libs/gdal:hdf5 - Add support for the Hierarchical Data Format v5 (sci-libs/hdf5)
sci-libs/gdal:mdb - Enable support for Microsoft Access database
sci-libs/gdal:ogdi - Enable support for the open geographic datastore interface (sci-libs/ogdi)
sci-libs/gdal:opencl - Enable OpenCL support
sci-libs/gdal:spatialite - Enable Spatial DBMS over sqlite dev-db/spatialite
sci-libs/gdal:xls - Add the dev-libs/freexl library for xls import support
sci-libs/grib_api:jasper - Use media-libs/jasper instead of media-libs/openjpeg for JPEG 2000 support
sci-libs/gsl:cblas-external - Link gsl with external cblas provided by (virtual/cblas) instead of shipped internal version
sci-libs/hdf5:fortran2003 - enable new features that require Fortran 2003 (http://www.hdfgroup.org/HDF5/doc/fortran/NewFeatures_F2003.pdf)
sci-libs/indilib:nova - Enable support for nova celestial mechanics calculations
sci-libs/ipopt:hsl - hsl
sci-libs/ipopt:mumps - Enable sci-libs/mumps support
sci-libs/lemon:coin - Enable the coinor-clp and coinor-cbc graph algorithms
sci-libs/lemon:glpk - Enable GNU Linear Programming Kit sci-mathematics/glpk support
sci-libs/lemon:tools - Build additional tools
sci-libs/libghemical:mopac7 - Use sci-chemistry/mopac7 for semi-empirical calculations
sci-libs/libghemical:mpqc - Use sci-chemistry/mpqc for quantum-mechanical calculations
sci-libs/libsvm:tools - Install python based tool scripts
sci-libs/linux-gpib:firmware - Install firmware
sci-libs/linux-gpib:isa - Build ISA kernel modules; from 3.12 on the setting is ignored and the decision based on the kernel configuration
sci-libs/lis:fma - Use the Fused Multiply Add instruction set (x86 arches)
sci-libs/lis:quad - Enable quadruple precision operations
sci-libs/lis:saamg - Build the Smoothed Aggregation Algebraic MultiGrid preconditioner
sci-libs/magma:fermi - Compile for GPU NVIDIA Fermi family (2.x cards)
sci-libs/magma:kepler - Compile for GPU NVIDIA Kepler family (GF 6xx cards)
sci-libs/mathgl:hdf - Add support for the Hierarchical Data Format v.4 sci-libs/hdf
sci-libs/mathgl:octave - Add bindings for sci-mathematics/octave
sci-libs/matio:sparse - Extend formats for sparse matrix (not matlab)
sci-libs/mkl:fortran95 - Installs the BLAS/LAPACK FORTRAN95 static libraries
sci-libs/mkl:int64 - Installs the 64 bits integer libraries
sci-libs/mpir:cpudetection - Enables runtime cpudetection (useful for bindist, compatability on other CPUs)
sci-libs/mumps:metis - Enable matrix ordering with METIS (sci-libs/metis, sci-libs/parmetis)
sci-libs/mumps:scotch - Enable matrix ordering with sci-libs/scotch
sci-libs/netcdf:dap - Support for remote data access with the built-in OPeNDAP client
sci-libs/netcdf:hdf - Add support for the Hierarchical Data Format v.4 sci-libs/hdf
sci-libs/netcdf:tools - Build the utilities nccopy, ncgen and ncdump
sci-libs/nlopt:octave - Add plugin for sci-mathematics/octave
sci-libs/opencascade:freeimage - Enable support for image i/o via media-libs/freeimage
sci-libs/opencascade:gl2ps - Use gl2ps PostScript printing library
sci-libs/opencascade:tbb - tEnable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/openfoam:opendx - Install opendx visualisation tool
sci-libs/openfoam:paraview - Enable support for paraview library
sci-libs/openfoam:src - Install source files
sci-libs/openmm:cuda - enable cuda back-end
sci-libs/openmm:opencl - enable opencl back-end
sci-libs/openmm:wrappers - build wrappers for Python, C and Fortran
sci-libs/plplot:ada - Add bindings for the ADA programming language
sci-libs/plplot:dynamic - Build with dynamic drivers
sci-libs/plplot:octave - Add bindings for sci-mathematics/octave
sci-libs/plplot:pdl - Add bindings for dev-perl/PDL
sci-libs/plplot:qhull - Add bindings for media-libs/qhull
sci-libs/plplot:shapefile - Enable support for ESRI shapefiles
sci-libs/scikits_image:freeimage - Enable support for image i/o via media-libs/freeimage
sci-libs/scikits_image:pyamg - Enable support for algebraic solvers via dev-python/pyamg
sci-libs/scipy:sparse - Adds support for sparse solving with sci-libs/umfpack
sci-libs/scotch:int64 - Build the 64 bits integer library (needed for > 2^31 vertices)
sci-libs/scotch:tools - Build and install extra exec tools
sci-libs/shogun:R - Enable support for dev-lang/R
sci-libs/shogun:arpack - Enable support for sci-libs/arpack
sci-libs/shogun:eigen - Enable support for matrix package dev-cpp/eigen
sci-libs/shogun:glpk - Enable support for sci-mathematics/glpk
sci-libs/shogun:json - Enable support for parsing JSON format
sci-libs/shogun:lpsolve - Enable support for Linear Programming Solver
sci-libs/shogun:nlopt - Enable support non linear optimization from sci-libs/nlopt
sci-libs/shogun:octave - Enable support for sci-mathematics/octave
sci-libs/shogun:snappy - Enable support for snappy compression
sci-libs/shogun:superlu - Enable support for sci-libs/superlu
sci-libs/spqr:metis - Use sci-libs/metis or sci-libs/parmetis for partitioning
sci-libs/spqr:tbb - Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/spr:root - Add sci-physics/root graphics and i/o support
sci-libs/suitesparse:cuda - Enable nvidia cuda toolkit for speeding up computations
sci-libs/suitesparse:metis - Enable the Partition module to cholmod using sci-libs/metis
sci-libs/suitesparse:tbb - Enable multithreading with the Intel Threads Building Block dev-cpp/tbb
sci-libs/taucs:cilk - Enable multithreading using dev-lang/cilk)
sci-libs/umfpack:cholmod - Use sci-libs/cholmod for matrix ordering
sci-libs/votca-tools:system-boost - Use system boost (dev-libs/boost) instead of bundled one
sci-libs/vtk:R - Enable support for dev-lang/R
sci-libs/vtk:boost - Add support for boost
sci-libs/vtk:cg - Use nvidia's cg shaders
sci-libs/vtk:chemistry - Add chemistry support
sci-libs/vtk:imaging - Building Imaging modules
sci-libs/vtk:offscreen - Offscreen rendering through OSMesa
sci-libs/vtk:patented - Build patented classes
sci-libs/vtk:rendering - Building Redering modules
sci-libs/vtk:views - Building Views modules
sci-libs/xkaapi:blas - Kaapi BLAS tasks for PLASMA
sci-libs/xkaapi:gpu - Build library for gpu threading
sci-mathematics/Macaulay2:optimization - Accept upstream's choices for -O option, i.e. -O3 almost everywhere.
sci-mathematics/agda:epic - Add support for the epic compiler.
sci-mathematics/agda:stdlib - Install the standard library.
sci-mathematics/bertini:optimization - Accept upstream's choices for -O option.
sci-mathematics/cgal:mpfi - Enable support for multiple recision interval arithmetic via sci-mathematics/mpfi
sci-mathematics/coq:camlp5 - Build using camlp5. This is required for some plugins like Ssreflect.
sci-mathematics/cvc3:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/cvc3:zchaff - Use the SAT solver zchaff whose copyright is owned by Princeton University and is more restrictive (see zchaff license).
sci-mathematics/e:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/form:devref - Build and install developers reference
sci-mathematics/form:doxygen - Build and install API documentation
sci-mathematics/freemat:volpack - Add volume rendering via media-libs/volpack
sci-mathematics/freemat:vtk - Add 3D capabilities via sci-libs/vtk
sci-mathematics/fricas:clisp - Add support for GNU CLISP (dev-lisp/clisp)
sci-mathematics/fricas:clozurecl - Add support for Clozure Common Lisp (dev-lisp/clozurecl)
sci-mathematics/fricas:cmucl - Add support for CMU Common Lisp (dev-lisp/cmucl)
sci-mathematics/fricas:ecls - Add support for Embeddable Common Lisp (dev-lisp/ecls)
sci-mathematics/fricas:gcl - Add support for GNU Common Lisp (dev-lisp/gcl)
sci-mathematics/fricas:sbcl - Add support for Steel Bank Common Lisp (dev-lisp/sbcl)
sci-mathematics/geomview:avg - Enable experimental motion averaging technique
sci-mathematics/geomview:motionaveraging - Enable experimental motion averaging technique
sci-mathematics/geomview:netpbm - Add media-libs/netpbm support for external modules
sci-mathematics/gmp-ecm:custom-tune - Improve performance of some operations by selecting machine-specific defaults
sci-mathematics/gmp-ecm:gwnum - Use GWNum lib where possible
sci-mathematics/gretl:R - Enable support for dev-lang/R
sci-mathematics/gsl-shell:fox - Build a x11-libs/fox GUI
sci-mathematics/isabelle:CCL - CCL (Classical Computational Logic)
sci-mathematics/isabelle:CTT - CTT (Constructive Type Theory) is an extensional version of Martin-Löf's Type Theory.
sci-mathematics/isabelle:Cube - Cube (The Lambda Cube)
sci-mathematics/isabelle:FOL - FOL (Many-sorted First-Order Logic) provides basic classical and intuitionistic first-order logic. It is polymorphic.
sci-mathematics/isabelle:FOLP - FOLP (FOL with Proof Terms)
sci-mathematics/isabelle:HOL - (Higher-Order Logic) is a version of classical higher-order logic resembling that of the HOL System.
sci-mathematics/isabelle:LCF - LCF (Logic of Computable Functions)
sci-mathematics/isabelle:Pure - Pure is the basis for all object-logics.
sci-mathematics/isabelle:Sequents - Sequents (first-order, modal and linear logics)
sci-mathematics/isabelle:ZF - ZF (Set Theory) offers a formulation of Zermelo-Fraenkel set theory on top of FOL.
sci-mathematics/isabelle:graphbrowsing - Generate theory browsing information, including HTML documents that show a theory's definition, the theorems proved in its ML file and the relationship with its ancestors and descendants.
sci-mathematics/isabelle:ledit - Use ledit for the isabelle tty line editor
sci-mathematics/isabelle:pide - Build Isabelle/jEdit Prover IDE (PIDE).
sci-mathematics/isabelle:proofgeneral - Add support for the app-emacs/proofgeneral proof assistant front end.
sci-mathematics/isabelle:readline - Use readline (rlwrap) for the isabelle tty line editor
sci-mathematics/kodkodi:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/maxima:clisp - Compile maxima with GNU CLISP (dev-lisp/clisp)
sci-mathematics/maxima:clozurecl - Compile maxima with Clozure Common Lisp (dev-lisp/clozurecl)
sci-mathematics/maxima:cmucl - Compile maxima with CMU Common Lisp (dev-lisp/cmucl)
sci-mathematics/maxima:ecls - Compile maxima with Embeddable Common Lisp (dev-lisp/ecls)
sci-mathematics/maxima:gcl - Compile maxima with GNU Common Lisp (dev-lisp/gcl)
sci-mathematics/maxima:sbcl - Compile maxima with Steel Bank Common Lisp (dev-lisp/sbcl)
sci-mathematics/minisat:extended-solver - Build extended version of SAT solver with additional features.
sci-mathematics/msieve:ecm - Enable support for the GMP-ECM library
sci-mathematics/normaliz:extras - Install sci-mathematics/Macaulay2 and sci-mathematics/singular packages as shipped by upstream
sci-mathematics/nusmv:minisat - Enable support for MiniSat
sci-mathematics/octave:glpk - Add support for sci-libs/glpk for linear programming
sci-mathematics/octave:gui - Enable the graphical user interface
sci-mathematics/octave:jit - (EXPERIMENTAL) enable JIT compiler
sci-mathematics/octave:qhull - Add support for sci-libs/qhull, to allow `delaunay', `convhull', and related functions
sci-mathematics/octave:qrupdate - Add support for sci-libs/qrupdatefor QR and Cholesky update functions
sci-mathematics/octave:sparse - Add enhanced support for sparse matrix algebra with SuiteSparse
sci-mathematics/pari:data - Add additional data (elldata, galdata, seadata, nftables)
sci-mathematics/polymake:libpolymake - Build the polymake library to build applications using the C++ interface.
sci-mathematics/rstudio:server - Build and install the RStudio server
sci-mathematics/singular:boost - Compile against external boost headers (dev-libs/boost)
sci-mathematics/spass:isabelle - Add integration support for the Isabelle/HOL theorem prover.
sci-mathematics/unuran:prng - Use sci-mathematics/prng library
sci-mathematics/unuran:rngstreams - Use sci-mathematics/rngstreams library
sci-mathematics/yacas:server - Build the network server version
sci-mathematics/yafu:sieve - Use msieve for the sieving steps of NFS
sci-misc/boinc:cuda - Use nvidia cuda toolkit for speeding up computations. NOTE: works only for subset of nvidia graphic cards so make sure your card is supported before opening bug about it.
sci-misc/h5utils:hdf - Build hdf to hdf5 (and vice-versa) converter
sci-misc/h5utils:octave - Build Octave plugins
sci-misc/nco:dap - Support for remote data access with the NETCDF DAP client
sci-misc/nco:ncap2 - Build next generation netcdf arithmetic processor (needs dev-java/antlr)
sci-misc/nco:udunits - Add sci-libs/udunits files support
sci-physics/bullet:double-precision - Build libraries in double precision
sci-physics/bullet:extras - Build additional libraries
sci-physics/cernlib-montecarlo:herwig - Build Herwig internal event generator, newer version available in sci-physics/herwig
sci-physics/clhep:exceptions - Enable zoom exceptions for user intervention
sci-physics/espresso:examples - Installs the examples
sci-physics/espresso:packages - Installs extra subpackages
sci-physics/espresso++:system-boost - Use system boost (dev-libs/boost) instead of bundled one
sci-physics/fastjet:cgal - Use sci-mathematics/cgal instead of bundled algorithms
sci-physics/fastjet:plugins - Build all standard and C++ plugins
sci-physics/geant:data - Add a lot of standard physics data files for geant4
sci-physics/geant:dawn - Add support for media-gfx/dawn (3D postscript rendering)
sci-physics/geant:gdml - Enable geometry markup language for xml
sci-physics/geant:geant3 - Add compatibility for geant321 to geant4
sci-physics/geant:granular - Produce many small libraries instead of global ones
sci-physics/geant:inventor - Add support for Open Inventor SGI toolkit via Coin3D
sci-physics/geant:raytracerx - Enable raytracing for physics events
sci-physics/geant:vrml - Enable output of geant4 in vrml formats
sci-physics/hepmc:cm - Build with cm instead of default mm for length units
sci-physics/hepmc:gev - Build with GeV instead of default MeV for momentum units
sci-physics/lammps:lammps-memalign - Enables the use of the posix_memalign() call instead of malloc() when large chunks or memory are allocated by LAMMPS
sci-physics/lammps:lammps-package-dipole - point dipole particles
sci-physics/lammps:lammps-package-meam - modified EAM potential
sci-physics/lammps:lammps-package-reax - ReaxFF potential
sci-physics/lammps:lammps-package-rigid - rigid bodies
sci-physics/lammps:lammps-package-voronoi - Voronoi tesselations
sci-physics/lammps:package-dipole - point dipole particles
sci-physics/lammps:package-meam - modified EAM potential
sci-physics/lammps:package-rigid - rigid bodies
sci-physics/lhapdf:octave - Add bindings for sci-mathematics/octave
sci-physics/meep:mpb - Enable build against sci-physics/mpb
sci-physics/pythia:hepmc - Adds support for High Energy Physics Monte Carlo Generators sci-physics/hepmc
sci-physics/root:c++0x - Build ROOT using the C++11 standard. Not supported, requires sys-devel/gcc>=4.7.0
sci-physics/root:clarens - Build the Clarens and PEAC plug-ins, to use in a GRID enabled analysis
sci-physics/root:fits - Support for images and data from FITS files with sci-libs/cfitsio
sci-physics/root:htmldoc - Generate html documentation
sci-physics/root:math - Build all math related libraries plugins, needs sci-libs/gsl
sci-physics/root:metric - Default to A4 paper size and metric measurement
sci-physics/root:pythia6 - Build the interface for sci-physics/pythia version 6.x
sci-physics/root:pythia8 - Build the interface for sci-physics/pythia version 8.x
sci-physics/root:reflex - Build the reflection database for the C++ interpreter
sci-physics/root:xrootd - Build the interface for net-libs/xrootd
sci-visualization/fityk:nlopt - Enable optimization with sci-libs/nlopt
sci-visualization/gnuplot:bitmap - Enable dot-matrix printers and pbm terminal
sci-visualization/gnuplot:gd - Add support for media-libs/gd. Needed for GIF, JPEG, and PNG image output.
sci-visualization/gnuplot:thin-splines - Enable thin plate splines
sci-visualization/gwyddion:sourceview - Enable support for x11-libs/gtksourceview
sci-visualization/opendx:cdf - Add support for sci-libs/cdf data exchange format
sci-visualization/opendx:hdf - Add support for the Hierarchical Data Format (sci-libs/hdf)
sci-visualization/paraview:boost - Enable the usage of dev-libs/boost
sci-visualization/paraview:cg - Add support for nvidia's cg shaders
sci-visualization/paraview:coprocessing - Enable the coprocessing infrastructure which is mainly useful in the context of clusters
sci-visualization/paraview:development - Install development files including headers
sci-visualization/paraview:nvcontrol - Add NVCONTROL support for OpenGL options
sci-visualization/paraview:plugins - Build and install additional plugins
sci-visualization/veusz:emf - Add FITS format via dev-python/pyemf
sci-visualization/veusz:fits - Add FITS format via dev-python/pyfits
sci-visualization/veusz:vo - Add Virtual Observatory tools via dev-python/astropy
sec-policy/selinux-base:open_perms - Enable the open permissions for file object classes (SELinux policy capability).
sec-policy/selinux-base:peer_perms - Enable the labeled networking peer permissions (SELinux policy capability).
sec-policy/selinux-base:ubac - Enable User Based Access Control (UBAC) in the SELinux policy
sec-policy/selinux-base:unconfined - Enable support for the unconfined SELinux module
sec-policy/selinux-base-policy:unconfined - Enable support for the unconfined SELinux policy module
sys-apps/accountsservice:introspection - Use dev-libs/gobject-introspection for introspection
sys-apps/accountsservice:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for session tracking
sys-apps/accountsservice:vala - Enable bindings for dev-lang/vala
sys-apps/acl:nfs - add support for NFS acls
sys-apps/baselayout-prefix:prefix-chaining - install in a chained Prefix environment
sys-apps/busybox:make-symlinks - Create all the appropriate symlinks in /bin and /sbin.
sys-apps/busybox:math - Enable math support in gawk (requires libm)
sys-apps/busybox:mdev - Create the appropriate symlink in /sbin and install mdev.conf and support files
sys-apps/busybox:sep-usr - Support a separate /usr without needing an initramfs by booting with init=/ginit
sys-apps/busybox:static - Make the system rescue shell (/bin/bb) static so you can recover even when glibc is broken
sys-apps/busybox:systemd - Support systemd
sys-apps/dbus:systemd - Build with sys-apps/systemd at_console support
sys-apps/dmtcp:fast - Enable experimental performance options such as mmap allocator.
sys-apps/dmtcp:trace - Enable ptrace support (only valid with debug enabled).
sys-apps/dstat:wifi - Enable wireless network functions
sys-apps/elfix:ptpax - Enable PT_PAX_FLAGS support.
sys-apps/elfix:xtpax - Enable XATTR_PAX_FLAGS support.
sys-apps/entropy-server:matter - Pull in app-admin/matter
sys-apps/etckeeper:bazaar - Support dev-vcs/bzr based repository
sys-apps/etckeeper:cron - Install cron script
sys-apps/flashrom:atahpt - Highpoint (HPT) ATA/RAID controller support
sys-apps/flashrom:bitbang_spi - Bitbanging SPI infrastructure
sys-apps/flashrom:buspirate_spi - Enable Bus Pirate SPI programmer
sys-apps/flashrom:dediprog - Dediprog SF100 support
sys-apps/flashrom:drkaiser - Enable Dr. Kaiser programmer
sys-apps/flashrom:dummy - Enable dummy tracing
sys-apps/flashrom:ft2232_spi - Enable ftdi programmer, flashing through FTDI/SPI USB interface
sys-apps/flashrom:gfxnvidia - Enable NVIDIA programmer
sys-apps/flashrom:internal - Enable internal/onboard support
sys-apps/flashrom:linux_spi - Enable support for Linux userspace spidev interface
sys-apps/flashrom:nic3com - Enable 3Com NIC programmer
sys-apps/flashrom:nicintel - Support for Intel NICs
sys-apps/flashrom:nicintel_spi - Support for SPI on Intel NICs
sys-apps/flashrom:nicnatsemi - Support for National Semiconductor NICs
sys-apps/flashrom:nicrealtek - Support for Realtek NICs
sys-apps/flashrom:ogp_spi - Enable support for OGP (Open Graphics Project) SPI flashing
sys-apps/flashrom:pony_spi - Enable support for SI-Prog like hardware by Lancos
sys-apps/flashrom:rayer_spi - RayeR SPIPGM hardware support
sys-apps/flashrom:satamv - Enable programmer for Marvell SATA controllers
sys-apps/flashrom:satasii - Enable programmer for SiI SATA controllers
sys-apps/flashrom:serprog - Enable Serial Flasher programmer
sys-apps/flashrom:tools - Install additional tools
sys-apps/flashrom:usbblaster - Enable support for Altera USB-Blaster dongles
sys-apps/flashrom:wiki - Enable wiki informations, like supported devices etc.
sys-apps/gawk:mpfr - use mpfr for high precision arithmetic (-M / --bignum)
sys-apps/gnome-disk-utility:fat - Include FAT16/FAT32 support (sys-fs/dosfstools)
sys-apps/gnome-disk-utility:nautilus - Enable gnome-base/nautilus extension.
sys-apps/gnome-disk-utility:remote-access - Enable access to remote udisks daemons.
sys-apps/hwdata-gentoo:binary-drivers - Adds support for ATI/NVIDIA binary drivers
sys-apps/hwloc:cuda - Enable CUDA device discovery
sys-apps/hwloc:gl - Enable GL display device discovery (NVCtrl)
sys-apps/hwloc:numa - Add support for numa memory allocation
sys-apps/hwloc:opencl - Enable OpenCL device discovery (AMD only)
sys-apps/hwloc:pci - Enable PCI device discovery using libpci
sys-apps/hwloc:plugins - Build hwloc components as plugins so that the hwloc core library does not directly depend on their dependencies (for instance the libpci library)
sys-apps/iotools:make-symlinks - Generate sub-command symlinks to iotools -- note that a lot are simple like "xor"
sys-apps/ipmitool:openipmi - Use the system OpenIPMI implementation.
sys-apps/iproute2:berkdb - build programs that use berkdb (just arpd)
sys-apps/iproute2:iptables - include support for iptables filtering
sys-apps/irqbalance:numa - Support balancing IRQs across NUMA nodes
sys-apps/kexec-tools:booke - Include support for Book-E memory management
sys-apps/kexec-tools:lzma - Enables support for LZMA compressed kernel images
sys-apps/kexec-tools:xen - Enable extended xen support
sys-apps/kmod:openrc - Install the OpenRC init scripts
sys-apps/kmod:tools - Install module loading/unloading tools.
sys-apps/kmscon:drm - Enable Linux DRM for backend
sys-apps/kmscon:fbdev - Enable Linux FBDev for backend
sys-apps/kmscon:gles2 - Enable GLES2 for backend
sys-apps/kmscon:multiseat - Enable multiseat support via systemd
sys-apps/kmscon:optimizations - Enable optimizations
sys-apps/kmscon:pango - Enable pango font rendering
sys-apps/kmscon:pixman - Enable pixman font rendering
sys-apps/lm_sensors:sensord - Enable sensord - a daemon that can be used to periodically log sensor readings from hardware health-monitoring chips
sys-apps/memtest86:serial - Compile with serial console support
sys-apps/memtest86+:floppy - Install a script to create floppy disks containing memtest86+ binaries.
sys-apps/memtest86+:serial - Compile with serial console support
sys-apps/moreutils:perl - Install scripts written in Perl
sys-apps/net-tools:old-output - use old ifconfig output style (useful for when new output breaks scripts)
sys-apps/openrc:netifrc - enable Gentoo's network stack (net.* scripts)
sys-apps/openrc:newnet - enable the new network stack (experimental)
sys-apps/openrc:tools - build optional tools
sys-apps/pacman:gpg - Support verifying packages signed with GPG using app-crypt/gpgme
sys-apps/paludis:pbins - Enable binary package support. Adds dependency upon app-arch/libarchive
sys-apps/paludis:pink - Use a less boring colourscheme than the default
sys-apps/paludis:portage - Enable experimental support for Portage configuration formats
sys-apps/paludis:prebuilt-documentation - Use pre-built documentation
sys-apps/paludis:python-bindings - Enable Python bindings. Requires a lot of RAM to build (~700Mbytes per job) and adds a dependency upon dev-libs/boost
sys-apps/paludis:ruby-bindings - Enable Ruby bindings.
sys-apps/paludis:search-index - Enable cave search --index. Requires sqlite.
sys-apps/paludis:visibility - Enable visibility support (g++ >=4.1)
sys-apps/pciutils:dns - Enable support for querying the central database of PCI IDs using DNS
sys-apps/pciutils:kmod - Enable sys-apps/kmod support for the -k switch in lspci command
sys-apps/pciutils:zlib - Support compressed pci.ids database
sys-apps/pcmciautils:staticsocket - Add support for static sockets
sys-apps/pcsc-lite:libusb - Use dev-libs/libusb detection to hotplug new smartcard readers. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.
sys-apps/pcsc-lite:policykit - Uses sys-auth/polkit to restrict access to smartcard readers or smartcars to given users.
sys-apps/pcsc-lite:udev - Use sys-fs/udev rules to handle devices' permissions and hotplug support. Unless you know what you're doing do not disable this flag on Linux kernels. This is provided as an option for completeness.
sys-apps/pcsc-tools:network-cron - Monthly cronjob the update-smartcard_list script
sys-apps/pkgcore:doc - Build and install API docs.
sys-apps/policycoreutils:audit - Enable support for sys-process/audit and use the audit_* functions (like audit_getuid instead of getuid())
sys-apps/policycoreutils:sesandbox - Enable support for SELinux sandbox application
sys-apps/portage:epydoc - Build html API documentation with epydoc.
sys-apps/portage:ipc - Use inter-process communication between portage and running ebuilds.
sys-apps/portage:less - Pull in sys-apps/less as default pager for etc-update.
sys-apps/portage:pypy2_0 - Use pypy-c2.0 as Python interpreter.
sys-apps/portage:python2 - Use python2 as Python interpreter.
sys-apps/portage:python3 - Use python3 as Python interpreter.
sys-apps/portage:xattr - Preserve extended attributes (filesystem-stored metadata) when installing files. Usually only required for hardened systems.
sys-apps/proot:care - Build dynamic CARE binary (more info - http://reproducible.io/)
sys-apps/pyrenamer:music - Enable support for renaming music
sys-apps/qingy:consolekit - Enable native consolekit support
sys-apps/qingy:opensslcrypt - Encrypt communications between qingy and its GUI using dev-libs/openssl
sys-apps/razercfg:pm-utils - Installs the pm-utils hooks for suspend/resume and requires sys-power/pm-utils
sys-apps/razercfg:qt4 - Installs a qt UI. Requires dev-python/pygtk
sys-apps/rsbac-admin:rklogd - Enabled deprecated RSBAC kernel logger
sys-apps/s390-tools:fuse - build cmsfs-fuse to read files stored on a z/VM CMS disk
sys-apps/s390-tools:zfcpdump - build the kernel disk dumping utility
sys-apps/shadow:audit - Enable support for sys-process/audit
sys-apps/smartmontools:minimal - Do not install the monitoring daemon and associated scripts.
sys-apps/superiotool:pci - Support for PCI-attached "Super I/Os" (e.g. in VIA VT82686A/B).
sys-apps/systemd:audit - Enable support for sys-process/audit
sys-apps/systemd:cryptsetup - Use libcryptsetup
sys-apps/systemd:firmware-loader - Enable user-space firmware loader (for kernels prior to 3.8)
sys-apps/systemd:gcrypt - Enable sealing of journal files using gcrypt
sys-apps/systemd:gudev - enable libudev gobject interface
sys-apps/systemd:http - Enable embedded HTTP server in journald
sys-apps/systemd:kdbus - Connect to kernel dbus (KDBUS) instead of userspace dbus if available
sys-apps/systemd:keymap - Map custom hardware's multimedia keys
sys-apps/systemd:kmod - Enable kernel module loading via sys-apps/kmod
sys-apps/systemd:openrc - Depend on sys-fs/udev-init-scripts
sys-apps/systemd:qrcode - Enable qrcode output support in journal
sys-apps/systemd:seccomp - Enable system call filtering via seccomp
sys-apps/systemd:vanilla - Disable Gentoo-specific behavior and compatibility quirks
sys-apps/tcp-wrappers:netgroups - Support matching NIS (host) netgroup names via the @netgroup syntax (if you don't know what this means, you most likely need want it)
sys-apps/timer_entropyd:debug - Enable printf debugging and logging to the syslog at DEBUG level
sys-apps/tuxonice-userui:fbsplash - Add support for framebuffer splash
sys-apps/ucspi-ssl:tls - Add TLS support (see also http://www.suspectclass.com/~sgifford/ucspi-tls/)
sys-apps/usb_modeswitch:jimtcl - Use dev-lang/jimtcl instead of dev-lang/tcl for smaller memory footprint
sys-apps/usbutils:network-cron - Monthly cronjob the update-usbids script
sys-apps/usermode-utilities:fuse - Build tools (currently umlmount) needing fuse
sys-apps/util-linux:caps - build setpriv helper (run programs with diff capabilities)
sys-apps/util-linux:cramfs - build mkfs/fsck helpers for cramfs filesystems
sys-apps/util-linux:cytune - build cytune for Cyclades-Z multiport serial cards
sys-apps/util-linux:ddate - build ddate helper (Discordian dates)
sys-apps/util-linux:fdformat - build fdformat (floppy disk format)
sys-apps/util-linux:pam - build runuser helper
sys-apps/util-linux:perl - install the chkdupexe helper script
sys-apps/util-linux:suid - install mount/umount as setuid so non-root users may mount/umount devices, and wall/write as setgid so non-root users can notify other users
sys-apps/util-linux:tty-helpers - install the mesg/wall/write tools for talking to local users
sys-apps/v86d:x86emu - Use x86emu for Video BIOS calls
sys-apps/watchdog:nfs - enable support for checking nfs mounts
sys-apps/xinetd:rpc - support RPC services
sys-auth/consolekit:policykit - Use the PolicyKit framework (sys-auth/polkit) to get authorization for suspend/shutdown.
sys-auth/consolekit:systemd-units - Install systemd unit files to replace the modern functionality of logind in sys-apps/systemd. Not recommended.
sys-auth/fingerprint-gui:upekbsapi - Add UPEK BSAPI drivers for identify functions on some readers
sys-auth/munge:gcrypt - Use libgcrypt instead of openssl
sys-auth/nss-mdns:search-domains - Honour search domains from /etc/resolv.conf (see bug #201948 for possible side effects)
sys-auth/pam_mktemp:prevent-removal - If supported, set EXT2_APPEND_FL on /tmp/.private to prevent temporary directories from being removed
sys-auth/pam_mysql:openssl - Use OpenSSL for md5 and sha1 support
sys-auth/pam_pkcs11:nss - Use Mozilla NSS (dev-libs/nss) as provider for PKCS#11 access, rather than using OpenSSL with a custom implementation of the PKC#11 protocol.
sys-auth/pam_pkcs11:pcsc-lite - Build the card_eventmanager binary used to detect card removal and lock the sessions. This needs sys-apps/pcsc-lite.
sys-auth/pambase:consolekit - Enable pam_ck_connector module on local system logins. This allows for console logins to make use of ConsoleKit authorization.
sys-auth/pambase:cracklib - Enable pam_cracklib module on system authentication stack. This produces warnings when changing password to something easily crackable. It requires the same USE flag to be enabled on sys-libs/pam or system login might be impossible.
sys-auth/pambase:debug - Enable debug information logging on syslog(3) for all the modules supporting this in the system authentication and system login stacks.
sys-auth/pambase:gnome-keyring - Enable pam_gnome_keyring module on system login stack. This enables proper Gnome Keyring access to logins, whether they are done with the login shell, a Desktop Manager or a remote login systems such as SSH.
sys-auth/pambase:minimal - Disables the standard PAM modules that provide extra information to users on login; this includes pam_tally (and pam_tally2 for Linux PAM 1.1 and later), pam_lastlog, pam_motd and other similar modules. This might not be a good idea on a multi-user system but could reduce slightly the overhead on single-user non-networked systems.
sys-auth/pambase:mktemp - Enable pam_mktemp module on system auth stack for session handling. This module creates a private temporary directory for the user, and sets TMP and TMPDIR accordingly.
sys-auth/pambase:pam_krb5 - Enable pam_krb5 module on system auth stack, as an alternative to pam_unix. If Kerberos authentication succeed, only pam_unix will be ignore, and all the other modules will proceed as usual, including Gnome Keyring and other session modules. It requires sys-libs/pam as PAM implementation.
sys-auth/pambase:pam_ssh - Enable pam_ssh module on system auth stack for authentication and session handling. This module will accept as password the passphrase of a private SSH key (one of ~/.ssh/id_rsa, ~/.ssh/id_dsa or ~/.ssh/identity), and will spawn an ssh-agent instance to cache the open key.
sys-auth/pambase:passwdqc - Enable pam_passwdqc module on system auth stack for password quality validation. This is an alternative to pam_cracklib producing warnings, rejecting or providing example passwords when changing your system password. It is used by default by OpenWall GNU/*/Linux and by FreeBSD.
sys-auth/pambase:sha512 - Switch Linux-PAM's pam_unix module to use sha512 for passwords hashes rather than MD5. This option requires >=sys-libs/pam-1.0.1 built against >=sys-libs/glibc-2.7, if it's built against an earlier version, it will silently be ignored, and MD5 hashes will be used. All the passwords changed after this USE flag is enabled will be saved to the shadow file hashed using SHA512 function. The password previously saved will be left untouched. Please note that while SHA512-hashed passwords will still be recognised if the USE flag is removed, the shadow file will not be compatible with systems using an earlier glibc version.
sys-auth/pambase:systemd - Use pam_systemd module to register user sessions in the systemd control group hierarchy.
sys-auth/polkit:systemd - Use sys-apps/systemd instead of sys-auth/consolekit for session tracking
sys-auth/sssd:autofs - Build helper to let net-fs/autofs use sssd provided information
sys-auth/sssd:locator - Install sssd's Kerberos plugin
sys-auth/sssd:manpages - Build man pages with dev-libs/libxslt
sys-auth/sssd:netlink - Add support for netlink protocol via dev-libs/libnl
sys-auth/sssd:ssh - Build helper to let net-misc/openssh use sssd provided information
sys-auth/sssd:sudo - Build helper to let app-admin/sudo use sssd provided information
sys-auth/ykpers:consolekit - Use sys-auth/consolekit and virtual/udev to allow access to the YubiKey HID device to the console user.
sys-block/gparted:btrfs - Include Btrfs support (sys-fs/btrfs-progs)
sys-block/gparted:dmraid - Support for dmraid devices, also known as ATA-RAID, or Fake RAID.
sys-block/gparted:f2fs - Include F2FS support (sys-fs/f2fs-tools)
sys-block/gparted:fat - Include FAT16/FAT32 support (sys-fs/dosfstools)
sys-block/gparted:gtk - Enable .desktop support for gtk+ based desktops.
sys-block/gparted:hfs - Include HFS support (sys-fs/hfsutils)
sys-block/gparted:jfs - Include JFS support (sys-fs/jfsutils)
sys-block/gparted:mdadm - Support for Linux software RAID.
sys-block/gparted:ntfs - Include NTFS support (sys-fs/ntfsprogs)
sys-block/gparted:reiser4 - Include ReiserFS4 support (sys-fs/reiser4progs)
sys-block/gparted:reiserfs - Include ReiserFS support (sys-fs/reiserfsprogs)
sys-block/gparted:xfs - Include XFS support (sys-fs/xfsprogs, sys-fs/xfsdump)
sys-block/parted:debug - Enable debugging as encouraged by upstream: [The default configuration] includes --enable-debug (by default), which contains many assertions. Obviously, these "waste" space, but in the past, they have caught potentially dangerous bugs before they would have done damage, so we think it's worth it. Also, it means we get more bug reports ;)
sys-block/parted:device-mapper - Enable device-mapper support from sys-fs/lvm2 in parted
sys-block/partimage:nologin - Do not include login support when connecting partimaged
sys-block/tgt:fcoe - Add support for FCoE protocol
sys-block/tgt:fcp - Add support for new FC protocol
sys-block/tgt:ibmvio - Add support for IBM Virtual I/O
sys-boot/grub:device-mapper - Enable support for device-mapper from sys-fs/lvm2
sys-boot/grub:efiemu - Build and install the efiemu runtimes
sys-boot/grub:libzfs - Enable support for sys-fs/zfs
sys-boot/grub:mount - Build and install the grub-mount utility
sys-boot/grub:multislot - Allow concurrent installation of sys-boot/grub:0 and sys-boot/grub:2 by renaming all programs.
sys-boot/lilo:device-mapper - Enable support for device-mapper from sys-fs/lvm2
sys-boot/lilo:minimal - Do not install the dolilo helper script
sys-boot/lilo:pxeserial - Avoid character echo on PXE serial console
sys-boot/plymouth:gdm - Enables smooth transition to GDM
sys-boot/plymouth:libkms - Provides abstraction to the DRM drivers (intel, nouveau and vmwgfx at this moment)
sys-boot/plymouth:pango - Adds support for printing text on splash screen and text prompts, e.g. for password
sys-cluster/ceph:cryptopp - Use dev-libs/crypto++ for cryptography
sys-cluster/ceph:fuse - Build fuse client
sys-cluster/ceph:libaio - Use libaio as asynchronous input/output library
sys-cluster/ceph:libatomic - Use libatomic instead of builtin atomic operations
sys-cluster/ceph:nss - Use dev-libs/nss for cryptography
sys-cluster/ceph:radosgw - Add radosgw support
sys-cluster/charm:charmdebug - Enable the charm debugger
sys-cluster/charm:charmproduction - Optimize performance of Charm++ runtime
sys-cluster/charm:charmtracing - Enable tracing support in Charm++
sys-cluster/charm:cmkopt - Enable CMK optimisation
sys-cluster/charm:mlogft - Compile with Charm++ message logging fault tolerance support
sys-cluster/charm:numa - Support memory affinity with NUMA
sys-cluster/charm:syncft - Compile with Charm++ fault tolerance support
sys-cluster/charm:tcp - Use TCP (instead of UPD) for socket communication
sys-cluster/cinder:api - Installs the initscripts for the cinder api service
sys-cluster/cinder:scheduler - Installs the initscripts for the cinder scheduler service
sys-cluster/cinder:volume - Installs the initscripts for the cinder volume service
sys-cluster/cluster-glue:large-cluster - Extend messages length limits for resource heavy clusters
sys-cluster/cluster-glue:libnet - Force use of net-libs/libnet
sys-cluster/corosync:infiniband - Enable Infiniband RDMA transport support
sys-cluster/drbd:heartbeat - Enable Heartbeat integration
sys-cluster/drbd:pacemaker - Enable Pacemaker integration
sys-cluster/drbd:xen - Enable Xen integration
sys-cluster/gearmand:drizzle - Support dev-db/libdrizzle for the queue storage. This also adds support for MySQL storage.
sys-cluster/gearmand:memcache - Support memcache daemon (via dev-libs/libmemcached) for the queue storage.
sys-cluster/gearmand:tokyocabinet - Support dev-db/tokyocabinet for the queue storage.
sys-cluster/glusterfs:bd-xlator - Enable the blockdevice translator (requires sys-fs/lvm2)
sys-cluster/glusterfs:extras - Install extra helper scripts
sys-cluster/glusterfs:fuse - Add FUSE mount helper
sys-cluster/glusterfs:georeplication - Enable support for georeplication (requires dev-lang/python)
sys-cluster/glusterfs:infiniband - Add support for Infiniband ibverbs transport. Libraries can be found in science overlay
sys-cluster/glusterfs:systemtap - Enable support for dev-util/systemtap
sys-cluster/maui:pbs - Enable pbs integration
sys-cluster/maui:slurm - Enable slurm integration
sys-cluster/moosefs:cgi - Install CGI server and scripts.
sys-cluster/moosefs:fuse - Install the mfsmount utility.
sys-cluster/mpich:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/mpich:romio - Build the ROMIO MPI-IO component
sys-cluster/mpich2:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/mpich2:romio - Enable romio, a high-performance portable MPI-IO implementation
sys-cluster/mvapich2:large-cluster - Automatically generated description for large-cluster
sys-cluster/mvapich2:medium-cluster - Automatically generated description for medium-cluster
sys-cluster/mvapich2:romio - Automatically generated description for romio
sys-cluster/neutron:dhcp - Installs the initscripts for the neutron dhcp service
sys-cluster/neutron:l3 - Installs the initscripts for the neutron l3 service
sys-cluster/neutron:metadata - Installs the initscripts for the neutron metadata service
sys-cluster/neutron:openvswitch - Installs the initscripts for the neutron openvswitch service
sys-cluster/neutron:server - Installs the initscripts for the neutron server service
sys-cluster/nova:api - Installs the initscripts for the nova api service
sys-cluster/nova:cert - Installs the initscripts for the nova scheduler service
sys-cluster/nova:compute - Installs the initscripts for the nova volume service
sys-cluster/nova:conductor - Installs the initscripts for the nova conductor service
sys-cluster/nova:consoleauth - Installs the initscripts for the nova consoleauth service
sys-cluster/nova:kvm - qemu-kvm hypervisor support
sys-cluster/nova:network - Installs the initscripts for the nova network service
sys-cluster/nova:novncproxy - Installs the initscripts for the nova novncproxy service
sys-cluster/nova:scheduler - Installs the initscripts for the nova scheduler service
sys-cluster/nova:spicehtml5proxy - Installs the initscripts for the nova spicehtml5proxy service
sys-cluster/nova:xen - xen hypervisor support
sys-cluster/nova:xvpvncproxy - Installs the initscripts for the nova xvpvncproxy service
sys-cluster/ocfs:aio - Add aio support
sys-cluster/openmpi:heterogeneous - Enable features required for heterogeneous platform support
sys-cluster/openmpi:mpi-threads - Enable MPI_THREAD_MULTIPLE
sys-cluster/openmpi:pbs - Add support for the Portable Batch System (PBS)
sys-cluster/openmpi:romio - Build the ROMIO MPI-IO component
sys-cluster/openmpi:vt - Enable bundled VampirTrace support
sys-cluster/openstack-meta:cinder - Installs Openstack Cinder
sys-cluster/openstack-meta:glance - Installs Openstack Glance
sys-cluster/openstack-meta:horizon - Installs Openstack Horizon
sys-cluster/openstack-meta:keystone - Installs Openstack Keystone
sys-cluster/openstack-meta:neutron - Installs Openstack Neutron
sys-cluster/openstack-meta:nova - Installs Openstack Nova
sys-cluster/openstack-meta:swift - Installs Openstack Swift
sys-cluster/pacemaker:ais - Enable sys-cluster/openais support.
sys-cluster/pacemaker:cman - Enable sys-cluster/cman support.
sys-cluster/pacemaker:heartbeat - Enable sys-cluster/heartbeat support.
sys-cluster/pacemaker:smtp - Enable SMTP support via net-libs/libsmtp
sys-cluster/pacemaker-gui:gtk - Enable the GTK+ based GUI client.
sys-cluster/pacemaker-gui:heartbeat - Enable support for heartbeat based sys-cluster/pacemaker.
sys-cluster/resource-agents:libnet - Force use of net-libs/libnet
sys-cluster/resource-agents:rgmanager - Install resources for sys-cluster/rgmanager
sys-cluster/slurm:maui - Enable maui scheduler support
sys-cluster/slurm:multiple-slurmd - Allow multiple slurmd to run
sys-cluster/slurm:munge - Enable authentication via munge
sys-cluster/slurm:torque - Enable perl scripts that emulates pbs (qstat, qsub etc.)
sys-cluster/slurm:ypbind - Enable ypbind based auth
sys-cluster/swift:account - adds swift account support
sys-cluster/swift:container - adds swift container suppport
sys-cluster/swift:memcache - adds memcached support
sys-cluster/swift:object - adds swift object support
sys-cluster/swift:proxy - adds swift proxy support
sys-cluster/torque:cpusets - Enable pbs_mom to utilize linux cpusets if available
sys-cluster/torque:drmaa - Enable the Distributed Resource Management Application API
sys-cluster/torque:munge - Enable authentication via munge
sys-cluster/torque:nvidia - Enable management of Nvidia GPUs
sys-cluster/torque:server - Enable compilation of pbs_server and pbs_sched
sys-cluster/vzctl:cgroup - Add support to Linux kernel cgroup subsytem
sys-cluster/vzctl:ploop - Add support for ploop devices via sys-cluster/ploop
sys-cluster/vzctl:vanilla-kernel - Support unpatched upstream Linux kernel
sys-cluster/vzctl:vz-kernel - Support OpenVZ patched kernel (sys-kernel/openvz-sources)
sys-cluster/vzctl:vzmigrate - Add support for container migration
sys-devel/autoconf:multislot - Allow for multiple versions to be installed at once
sys-devel/autogen:libopts - install the libopts tarball (a few packages want this for developing)
sys-devel/binutils:multislot - Allow for multiple versions of binutils to be emerged at once for same CTARGET
sys-devel/binutils:multitarget - Adds support to binutils for cross compiling (does not work with gas)
sys-devel/binutils-apple:lto - Add support for Link-Time Optimization with LLVM
sys-devel/binutils-hppa64:multislot - Allow for multiple versions of binutils to be emerged at once for same CTARGET
sys-devel/binutils-hppa64:multitarget - Adds support to binutils for cross compiling (does not work with gas)
sys-devel/clang:multitarget - Build all host targets (default: host only)
sys-devel/clang:static-analyzer - Install the Clang static analyzer
sys-devel/clang:system-cxx-headers - By default, clang++ searchs for C++ headers in a series of hardcoded paths. Enabling this flag will force it to use the active gcc profile ones
sys-devel/distcc:crossdev - Enable support for sys-devel/crossdev
sys-devel/distcc:gssapi - Enable support for net-libs/libgssglue
sys-devel/gcc:awt - Useful only when building GCJ, this enables Abstract Window Toolkit (AWT) peer support on top of GTK+
sys-devel/gcc:d - Enable support for the D programming language
sys-devel/gcc:fixed-point - Enable fixed-point arithmetic support for MIPS targets in gcc (Warning: significantly increases compile time!)
sys-devel/gcc:go - Build the GCC Go language frontend.
sys-devel/gcc:graphite - Add support for the framework for loop optimizations based on a polyhedral intermediate representation
sys-devel/gcc:ip28 - Enable building a compiler capable of building a kernel for SGI Indigo2 Impact R10000 (IP28)
sys-devel/gcc:ip32r10k - Enable building a compiler capable of building an experimental kernel for SGI O2 w/ R1x000 CPUs (IP32)
sys-devel/gcc:libssp - Build SSP support into a dedicated library rather than use the code in the C library (DO NOT ENABLE THIS IF YOU DON'T KNOW WHAT IT DOES)
sys-devel/gcc:mudflap - Add support for mudflap, a pointer use checking library
sys-devel/gcc:multislot - Allow for SLOTs to include minor version (3.3.4 instead of just 3.3)
sys-devel/gcc:n32 - Enable n32 ABI support on mips
sys-devel/gcc:n64 - Enable n64 ABI support on mips
sys-devel/gcc:nopie - Disable PIE support (NOT FOR GENERAL USE)
sys-devel/gcc:nossp - Disable SSP support (NOT FOR GENERAL USE)
sys-devel/gcc:objc - Build support for the Objective C code language
sys-devel/gcc:objc++ - Build support for the Objective C++ language
sys-devel/gcc:objc-gc - Build support for the Objective C code language Garbage Collector
sys-devel/gcc:regression-test - Run the testsuite and install the results (requires FEATURES=test)
sys-devel/gcc-apple:multislot - Allow for SLOTs to include minor version (3.3.4 instead of just 3.3)
sys-devel/gcc-apple:objc - Build support for the Objective C code language
sys-devel/gcc-apple:objc++ - Build support for the Objective C++ language
sys-devel/gdb:client - Install the main "gdb" program (most people want this)
sys-devel/gdb:lzma - Support lzma compression in ELF debug info
sys-devel/gdb:multitarget - Support all known targets in one gdb binary
sys-devel/gdb:python - Enable support for the new internal scripting language, as well as extended pretty printers
sys-devel/gdb:server - Install the "gdbserver" program (useful for embedded/remote targets)
sys-devel/gettext:cvs - When running `autopoint`, use cvs to store the internal development files; this requires cvs at runtime, but will be faster/smaller than raw archives
sys-devel/gettext:git - When running `autopoint`, use git to store the internal development files; this requires git at runtime, but will be faster/smaller than raw archives
sys-devel/kgcc64:multislot - Allow for SLOTs to include minor version (eg. 3.3.4 instead of just 3.3)
sys-devel/kgcc64:regression-test - Run the testsuite and install the results (requires FEATURES=test)
sys-devel/llvm:clang - Build the clang C/C++ compiler
sys-devel/llvm:doc - Build and install the HTML documentation and regenerate the man pages
sys-devel/llvm:gold - Build the gold linker plugin
sys-devel/llvm:llvm-gcc - Build LLVM with sys-devel/llvm-gcc
sys-devel/llvm:multitarget - Build all host targets (default: host only)
sys-devel/llvm:ncurses - Support querying terminal properties using ncurses' terminfo
sys-devel/llvm:static-analyzer - Install the Clang static analyzer (requires USE=clang)
sys-devel/llvm:udis86 - Enable support for dev-libs/udis86 disassembler library
sys-devel/sparse:gtk - Build the test-inspect utility (requires x11-libs/gtk+ version 2)
sys-devel/sparse:llvm - support llvm
sys-devel/sparse:xml - Build the c2xml utility (requires dev-libs/libxml2).
sys-firmware/ipxe:iso - Build a bootable ISO for using PXE
sys-firmware/ipxe:qemu - Build the required PXE ROM images for app-emulation/qemu and app-emulation/qemu-kvm
sys-firmware/ipxe:undi - Build a Universal Network Device Interface driver chainloading your existing PXE NIC into iPXE
sys-firmware/ipxe:usb - Build a bootable USB image for using PXE
sys-firmware/ipxe:vmware - Build the PXE ROM images that VMWare uses
sys-firmware/seabios:binary - Use official upstream pre-built binaries
sys-freebsd/boot0:tftp - Enable PXE/TFTP boot support.
sys-freebsd/boot0:zfs - Enable booting on ZFS filesystems.
sys-freebsd/freebsd-lib:hesiod - Enable support for net-dns/hesiod
sys-freebsd/freebsd-lib:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-lib:zfs - Enable ZFS support.
sys-freebsd/freebsd-rescue:netware - Build tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-rescue:zfs - Enable ZFS support.
sys-freebsd/freebsd-sbin:ipfilter - Build tools to administer the ipfilter firewall.
sys-freebsd/freebsd-sbin:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-sbin:pf - Build tools to administer the PF firewall.
sys-freebsd/freebsd-share:isdn - Enable ISDN support
sys-freebsd/freebsd-share:zfs - Enable ZFS support.
sys-freebsd/freebsd-sources:build-generic - Build and install a generic kernel (recommended).
sys-freebsd/freebsd-sources:dtrace - Enable DTrace support.
sys-freebsd/freebsd-ubin:ar - Build FreeBSD's ar and ranlib replacements based on libarchive. The toolchain will still use binutils' version but you can play with it. They have been renamed to freebsd-ar and freebsd-ranlib not to collide with binutils.
sys-freebsd/freebsd-ubin:audit - Build auditing tools.
sys-freebsd/freebsd-ubin:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-freebsd/freebsd-ubin:zfs - Enable ZFS support (for fstat actually).
sys-freebsd/freebsd-usbin:audit - Build auditing tools.
sys-freebsd/freebsd-usbin:floppy - Enable floppy disk utilities (fdcontrol, fdformat, fdread, fdwrite).
sys-freebsd/freebsd-usbin:netware - Build libraries and tools to work with NetWare protocols (IPX and NCP).
sys-fs/aufs3:debug - Enable additional debugging support
sys-fs/aufs3:fuse - Enable fuse support
sys-fs/aufs3:hfs - Enable hfs support
sys-fs/aufs3:inotify - Enable inotify support
sys-fs/aufs3:kernel-patch - Patch the current kernel for aufs3 support
sys-fs/aufs3:nfs - Enable support for nfs export
sys-fs/aufs3:pax_kernel - Apply patch needed for pax enabled kernels
sys-fs/aufs3:ramfs - Enable initramfs/rootfs support
sys-fs/btrfs-progs:debug-utils - Build additional utils for debugging
sys-fs/cryptsetup:dynamic - Build cryptsetup dynamically
sys-fs/cryptsetup:gcrypt - Use dev-libs/libgcrypt crypto backend
sys-fs/cryptsetup:kernel - Use kernel crypto backend (mainly for embedded systems)
sys-fs/cryptsetup:nettle - Use dev-libs/nettle crypto backend
sys-fs/cryptsetup:openssl - Use dev-libs/openssl crypto backend
sys-fs/cryptsetup:reencrypt - Build cryptsetup-reencrypt
sys-fs/cryptsetup:urandom - Use /dev/urandom instead of /dev/random
sys-fs/dmraid:dietlibc - Compile against dev-libs/dietlibc
sys-fs/dmraid:intel_led - Enable Intel LED support
sys-fs/dmraid:klibc - Compile against dev-libs/klibc
sys-fs/dmraid:led - Enable LED support
sys-fs/dmraid:mini - Create a minimal binary suitable for early boot environments
sys-fs/ecryptfs-utils:gpg - Enable app-crypt/gnupg key module
sys-fs/ecryptfs-utils:openssl - Enable dev-libs/openssl key module
sys-fs/ecryptfs-utils:pkcs11 - Enable PKCS#11 (Smartcards) key module
sys-fs/ecryptfs-utils:tpm - Enable support for Trusted Platform Module (TPM) using app-crypt/trousers
sys-fs/eudev:gudev - enable libudev gobject interface
sys-fs/eudev:hwdb - read vendor/device string database and add it to udev database
sys-fs/eudev:introspection - Use dev-libs/gobject-introspection for introspection
sys-fs/eudev:keymap - map custom hardware's multimedia keys
sys-fs/eudev:kmod - enable module loading through libkmod
sys-fs/eudev:modutils - enable module loading support - use modutils calls if kmod not enabled
sys-fs/eudev:openrc - install the OpenRC init scripts
sys-fs/eudev:rule-generator - install legacy rule generator rules and support scripts - note that the functionality within was dropped from sys-fs/udev as it is not stable in all cases; use at your own risk
sys-fs/ext4magic:expert-mode - Builds ext4magic with expert mode. Highly useful in recovering data from a corrupted filesystem
sys-fs/ext4magic:file-attr - Enable the recovery of file attributes (append, immutable, nodump etc)
sys-fs/fur:void-chmod - Enable fake hook for "chmod" that will only return 0
sys-fs/lessfs:filelog - Enable the ability to log to a file instead of syslog
sys-fs/lessfs:memtrace - Enable leefs to create a report regarding the memory allocation. This feature should be used for debugging purposes to avoid performance degradation
sys-fs/loop-aes:aes-ni - Enable support for Intel's AES instruction set
sys-fs/loop-aes:extra-ciphers - Enable extra ciphers
sys-fs/loop-aes:keyscrub - Protects the encryption key in memory but takes more cpu resources
sys-fs/loop-aes:padlock - Use VIA padlock instructions, detected at run time, code still works on non-padlock processors
sys-fs/lvm2:clvm - Allow users to build clustered lvm2
sys-fs/lvm2:cman - Cman support for clustered lvm
sys-fs/lvm2:device-mapper-only - Build only device-mapper and not the rest of LVM2 (UNSUPPORTED)
sys-fs/lvm2:lvm1 - Allow users to build lvm2 with lvm1 support
sys-fs/lvm2:lvm2create_initrd - Install lvm2create_initrd script and pull in sys-apps/makedev for the /sbin/MAKEDEV command
sys-fs/lvm2:thin - Support for thin volumes
sys-fs/mtpfs:mad - Enable handling of MP3's metadata
sys-fs/ntfs3g:external-fuse - Use external FUSE library instead of internal one. Must be disabled for unprivileged mounting to work.
sys-fs/ntfs3g:ntfsdecrypt - Build and install the ntfsdecrypt application.
sys-fs/ntfs3g:ntfsprogs - Include internal version of ntfsprogs. This will block sys-fs/ntfsprogs.
sys-fs/ocfs2-tools:external - Enable external locking
sys-fs/owfs:ftpd - Enable building the OWFS FTP server (owftpd)
sys-fs/owfs:fuse - Enable building the FUSE-based OWFS client (owfs)
sys-fs/owfs:httpd - Enable building the OWFS web server (owhttpd)
sys-fs/owfs:parport - Enable support for the DS1410E parallel port adapter
sys-fs/owfs:server - Enable building the OWFS server (owserver)
sys-fs/quota:netlink - Compile daemon receiving quota messages via netlink
sys-fs/quota:rpc - Enable quota interaction via RPC
sys-fs/s3ql:contrib - Install additional contributed scripts
sys-fs/squashfs-tools:lz4 - Enable support for LZ4 compression using app-arch/lz4
sys-fs/squashfs-tools:xz - Enable support for XZ ("LZMA2") compression using app-arch/xz-utils
sys-fs/udev:firmware-loader - Enable the userspace firmware loader (DEPRECATED, replaced by the in-kernel loader starting from 3.8)
sys-fs/udev:gudev - Build the gobject interface library
sys-fs/udev:kmod - Enable kernel module loading/unloading support using sys-apps/kmod
sys-fs/udev:openrc - Install the OpenRC init scripts
sys-fs/udisks:cryptsetup - Enable sys-fs/cryptsetup support
sys-fs/udisks:gptfdisk - Pull in sys-apps/gptfdisk for sgdisk command as used by partitioning functionality
sys-fs/udisks:introspection - Use dev-libs/gobject-introspection for introspection
sys-fs/udisks:remote-access - Control whether connections from other clients over LAN are allowed
sys-fs/udisks:systemd - Support sys-apps/systemd's logind
sys-fs/zfs:kernel-builtin - Disable dependency on sys-fs/zfs-kmod under the assumption that ZFS is part of the kernel source tree
sys-fs/zfs:rootfs - Enable dependencies required for booting off a pool containing a rootfs
sys-fs/zfs:test-suite - Install regression test suite
sys-fs/zfs-kmod:rootfs - Install zfs-shutdown script to support exporting a pool containing rootfs
sys-infiniband/ofed:compat-dapl - Add support for DAPL v1.2 abstraction layer
sys-infiniband/ofed:dapl - Add support for DAPL abstraction layer
sys-infiniband/ofed:diags - Add dignostic tools for infiniband
sys-infiniband/ofed:ibacm - Add support for userspace pre-connection services
sys-infiniband/ofed:mstflint - Tools to burn Mellanox firmware
sys-infiniband/ofed:opensm - Add OpenSM - Subnet manager for infiniband
sys-infiniband/ofed:perftest - Add perftest utils
sys-infiniband/ofed:rds - Tools to manage rds sockets
sys-infiniband/ofed:sdp - Add SDP tools
sys-infiniband/ofed:srp - Suport for userspace part for srp initiator
sys-kernel/aufs-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/aufs-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-kernel/aufs-sources:module - Patch kernel to allow aufs being build as a module.
sys-kernel/aufs-sources:vanilla - Use vanilla kernel sources without applying genpatches. WARNING: This flag will drop all support from the Gentoo Kernel Security team
sys-kernel/ck-sources:bfsonly - BFS by itslef vs The full ck patchset
sys-kernel/ck-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/ck-sources:experimental - Allow experimental code. Can break or degrade performances. (UNSUPPORTED)
sys-kernel/ck-sources:kvm - Enable boot on kvm
sys-kernel/ck-sources:urwlocks - Use upgradable read/write locks in place of the grq spinlock. (EXPERIMENTAL)
sys-kernel/dracut:debug - Module installing additional tools like strace, file editor, ssh and more
sys-kernel/dracut:device-mapper - Set of helper modules providing support for device mapper. You need to enable this only if emerge says so.
sys-kernel/dracut:net - Set of helper modules providing networking support. You need to enable this only if emerge says so.
sys-kernel/genkernel:crypt - Obsolete USE flag. Use cryptsetup for LUKS support. (bug ##414523)
sys-kernel/genkernel:cryptsetup - Enable support for Luks disk encryption using sys-fs/cryptsetup
sys-kernel/genkernel-next:cryptsetup - Enable support for Luks disk enrcyption using sys-fs/cryptsetup
sys-kernel/genkernel-next:dmraid - Enable support for DMRAID (include dmraid dependency)
sys-kernel/genkernel-next:gpg - Enable support for GPG (include gnupg dependency)
sys-kernel/genkernel-next:iscsi - Enable support for open-iscsi (include open-iscsi dependency)
sys-kernel/genkernel-next:plymouth - Enable support for Plymouth (include Plymouth dependency)
sys-kernel/gentoo-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/gentoo-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-kernel/hardened-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/linux-docs:html - Install HTML documentation
sys-kernel/linux-firmware:savedconfig - Allows individual selection of firmware files
sys-kernel/mips-sources:cobalt - Enables support for Cobalt Microserver hardware (Qube2/RaQ2)
sys-kernel/mips-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/mips-sources:impactdebug - Enables use of the IP30 Impact Early Console Hack. FOR DEBUGGING ONLY!
sys-kernel/mips-sources:ip27 - Enables support for SGI Origin (IP27)
sys-kernel/mips-sources:ip28 - Enables support for SGI Indigo2 Impact R10000 (IP28)
sys-kernel/mips-sources:ip30 - Enables support for SGI Octane (IP30, 'Speedracer')
sys-kernel/mips-sources:ip32r10k - Enables experimental support for IP32 R10K kernels (SGI O2, 'Moosehead')
sys-kernel/mips-sources:odysseydebug - Enables use of the IP30 Odyssey Early Console Hack. FOR DEBUGGING ONLY!
sys-kernel/openvz-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/pf-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/pf-sources:experimental - Apply patches that are considered experimental. For more information, check out the ChangeLog or the ebuild that interests you.
sys-kernel/rt-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/spl:debug-log - Enable additional diagnostics
sys-kernel/tuxonice-sources:experimental - Apply experimental patches; for more information, see "https://wiki.gentoo.org/wiki/Project:Kernel/Experimental".
sys-kernel/vanilla-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-kernel/vserver-sources:deblob - Remove binary blobs from kernel sources to provide libre license compliance.
sys-libs/db:rpc - Enable rpc client/server
sys-libs/freeipmi:nagios - Install a nagios plugin to check sensors' status.
sys-libs/gdbm:berkdb - enable compatibility layer for UNIX-like dbm and ndbm interfaces
sys-libs/gdbm:exporter - enable gdbmexport binary for exporting data from gdbm-1.8 databases into gdbm-1.9
sys-libs/glibc:gd - build memusage and memusagestat tools
sys-libs/glibc:nscd - Build, and enable support for, the Name Service Cache Daemon
sys-libs/glibc:suid - Make internal pt_chown helper setuid -- not needed if using Linux and have /dev/pts mounted with gid=5
sys-libs/glibc:systemtap - enable systemtap static probe points
sys-libs/gwenhywfar:fox - Use x11-libs/fox graphical toolkit
sys-libs/libcxx:libcxxrt - Build on top of sys-libs/libcxxrt instead of gcc's libsupc++ (avoids depending on gcc).
sys-libs/libcxxrt:libunwind - Use sys-libs/libunwind instead of libgcc_s for unwinding. This should allow avoiding relying on sys-devel/gcc but for now clang is setup to use libgcc_s.
sys-libs/libosinfo:introspection - Use dev-libs/gobject-introspection for introspection
sys-libs/libosinfo:vala - Enable bindings for dev-lang/vala
sys-libs/libseccomp:tools - enable debugging tools
sys-libs/libunwind:debug-frame - Adds support for DWARF .debug_frame section: Use the information from this section if available
sys-libs/libunwind:libatomic - Use libatomic instead of builtin atomic operations
sys-libs/ncurses:ada - Add bindings for the ADA programming language
sys-libs/ncurses:tinfo - Build curses library (libncurses) sep from the low-level terminfo library (libtinfo) -- usually needed only for binary packages -- but it is binary compatible in either mode
sys-libs/ncurses:trace - Enable test trace() support in ncurses calls
sys-libs/pam:audit - Enable support for sys-process/audit
sys-libs/pam:berkdb - Build the pam_userdb module, that allows to authenticate users against a Berkeley DB file. Please note that enabling this USE flag will create a PAM module that links to the Berkeley DB (as provided by sys-libs/db) installed in /usr/lib and will thus not work for boot-critical services authentication.
sys-libs/pam:cracklib - Build the pam_cracklib module, that allows to verify the chosen passwords' strength through the use of sys-libs/cracklib. Please note that simply enabling the USE flag on this package will not make use of pam_cracklib by default, you should also enable it in sys-auth/pambase as well as update your configuration files.
sys-libs/talloc:compat - Enable extra compatibility stuff
sys-libs/tdb:tdbtest - Install tdbtest app
sys-libs/tdb:tools - Install extra tools
sys-libs/uclibc:rpc - Enable sun nis/rpc support (you should use libtirpc though)
sys-libs/uclibc:savedconfig - Adds support for user defined configs
sys-libs/uclibc:ssp - Force the use of ssp to be built into a hardened uclibc setup
sys-libs/uclibc:uclibc-compat - Build uclibc with backwards compatible options
sys-libs/uclibc:wordexp - Add support for word expansion (wordexp.h)
sys-libs/zlib:minizip - include the minizip library for quick and dirty zip extraction
sys-power/cpufreqd:nforce2 - Enable support for nforce2 voltage settings plug-in
sys-power/cpufreqd:nvidia - Enable nvidia overclocking (media-video/nvclock) plug-in
sys-power/cpufreqd:pmu - Enable Power Management Unit plug-in
sys-power/cpupower:cpufreq_bench - Build and install the cpufreq_bench binary
sys-power/nut:ipmi - Support IPMI-based UPSes.
sys-power/nut:ups_drivers_al175 - Driver for Eltek UPS models with AL175 alarm module
sys-power/nut:ups_drivers_apcsmart - Driver for American Power Conversion Smart Protocol UPS equipment
sys-power/nut:ups_drivers_apcsmart-old - Driver for American Power Conversion Smart Protocol UPS equipment
sys-power/nut:ups_drivers_apcupsd-ups - Driver for apcupsd client access
sys-power/nut:ups_drivers_bcmxcp - Driver for UPSes supporting the serial BCM/XCP protocol
sys-power/nut:ups_drivers_bcmxcp_usb - Experimental driver for UPSes supporting the BCM/XCP protocol over USB
sys-power/nut:ups_drivers_belkin - Driver for Belkin serial UPS equipment
sys-power/nut:ups_drivers_belkinunv - Driver for Belkin "Universal UPS" and compatible
sys-power/nut:ups_drivers_bestfcom - Driver for Best Power Fortress/Ferrups
sys-power/nut:ups_drivers_bestfortress - Driver for old Best Fortress UPS equipment
sys-power/nut:ups_drivers_bestuferrups - Driver for Best Power Micro-Ferrups
sys-power/nut:ups_drivers_bestups - Driver for Best Power / SOLA (Phoenixtec protocol) UPS equipment
sys-power/nut:ups_drivers_blazer_ser - Driver for Megatec/Q1 protocol serial based UPS equipment
sys-power/nut:ups_drivers_blazer_usb - Driver for Megatec/Q1 protocol USB based UPS equipment
sys-power/nut:ups_drivers_clone - Fake driver to clone outlets for device grouping
sys-power/nut:ups_drivers_clone-outlet - Fake driver to clone outlets for device grouping
sys-power/nut:ups_drivers_dummy-ups - Driver for multi-purpose UPS emulation
sys-power/nut:ups_drivers_etapro - Driver for ETA UPS equipment
sys-power/nut:ups_drivers_everups - Driver for Ever UPS models
sys-power/nut:ups_drivers_gamatronic - Driver for Gamatronic UPS equipment
sys-power/nut:ups_drivers_genericups - Driver for contact-closure UPS equipment
sys-power/nut:ups_drivers_isbmex - Driver for ISBMEX UPS equipment
sys-power/nut:ups_drivers_ivtscd - driver for the IVT Solar Controller Device
sys-power/nut:ups_drivers_liebert - Driver for Liebert contact-closure UPS equipment
sys-power/nut:ups_drivers_liebert-esp2 - Driver for Liebert UPS, using the ESP-II serial protocol
sys-power/nut:ups_drivers_masterguard - Driver for Masterguard UPS equipment
sys-power/nut:ups_drivers_metasys - Driver for Meta System UPS equipment
sys-power/nut:ups_drivers_mge-shut - Driver for SHUT Protocol UPS equipment
sys-power/nut:ups_drivers_mge-utalk - Driver for MGE UPS SYSTEMS UTalk protocol equipment
sys-power/nut:ups_drivers_microdowell - Driver for Microdowell Enterprise UPS series
sys-power/nut:ups_drivers_netxml-ups - Driver for Eaton / MGE Network Management Card / Proxy (XML/HTTP Protocol) equipment
sys-power/nut:ups_drivers_nut-ipmipsu - Driver for IPMI Power Supply Units (PSU)
sys-power/nut:ups_drivers_nutdrv_qx - Driver for Q* protocol serial and USB based UPS equipment
sys-power/nut:ups_drivers_oldmge-shut - Driver for SHUT Protocol UPS equipment (older implementation)
sys-power/nut:ups_drivers_oneac - Driver for Oneac UPS equipment
sys-power/nut:ups_drivers_optiups - Driver for Opti-UPS (Viewsonic) UPS and Zinto D (ONLINE-USV) equipment
sys-power/nut:ups_drivers_powercom - UPS driver for serial Powercom/Trust/Advice UPS equipment
sys-power/nut:ups_drivers_powerpanel - Driver for PowerPanel Plus compatible UPS equipment
sys-power/nut:ups_drivers_rhino - Driver for Brazilian Microsol RHINO UPS equipment
sys-power/nut:ups_drivers_richcomm_usb - Driver UPS equipment using Richcomm dry-contact to USB solution
sys-power/nut:ups_drivers_riello_ser - Driver for Riello UPS Protocol UPS equipment
sys-power/nut:ups_drivers_riello_usb - Driver for Riello UPS Protocol UPS equipment via USB
sys-power/nut:ups_drivers_safenet - Driver for SafeNet compatible UPS equipment
sys-power/nut:ups_drivers_snmp-ups - Multi-MIB Driver for SNMP UPS equipment
sys-power/nut:ups_drivers_solis - Driver for Brazilian Microsol SOLIS UPS equipment
sys-power/nut:ups_drivers_tripplite - Driver for Tripp-Lite SmartPro UPS equipment
sys-power/nut:ups_drivers_tripplite_usb - Driver for older Tripp Lite USB UPSes (not PDC HID)
sys-power/nut:ups_drivers_tripplitesu - Driver for Tripp-Lite SmartOnline (SU) UPS equipment
sys-power/nut:ups_drivers_upscode2 - Driver for UPScode II compatible UPS equipment
sys-power/nut:ups_drivers_usbhid-ups - Driver for USB/HID UPS equipment
sys-power/nut:ups_drivers_victronups - Driver for IMV/Victron UPS unit Match, Match Lite, NetUps
sys-power/nvclock:gtk - Install the GTK+ based graphical interface
sys-power/nvclock:nvcontrol - Add NVCONTROL support for OpenGL options
sys-power/phctool:sudo - Enable support for sudo to run gui from non-root user
sys-power/pm-utils:ntp - Install support for net-misc/ntp
sys-power/powerman:genders - Add support for selecting power control targets using genders (-g option)
sys-power/powerman:h8power - Add support for h8 based power controllers
sys-power/powerman:httppower - Add support for HTTP based power controllers
sys-power/powerman:snmppower - Add support for SNMP based power controllers
sys-power/powermgmt-base:pm-utils - Adds support for on_ac_power through sys-power/pm-utils
sys-power/suspend:crypt - Allows suspend and resume from encrypted disk
sys-power/suspend:fbsplash - Add support for framebuffer splash
sys-process/cronie:anacron - Install the periodic anacron command scheduler.
sys-process/cronie:inotify - Enable inotify filesystem monitoring support.
sys-process/fcron:debug - Enable debug code and output. Since version 3.0.5 this will no longer force foreground execution, and fcron will be able to run as a service properly.
sys-process/fcron:mta - Enable mta support for sending emails from fcron
sys-process/fcron:pam - Enable PAM support for fcron. This means that fcron will pass through the "fcron" stack before executing the jobs, and fcrontab will use the "fcrontab" stack to authenticate the user before editing its crontab file.
sys-process/fcron:system-crontab - Set up fcron to respect /etc/crontab and /etc/cron.d. If this flag is disabled, /etc/cron.d and /etc/crontab will be ignored, but /etc/cron.{hourly,daily,weekly,monthly} will still be respected.
sys-process/htop:openvz - Enable openvz support
sys-process/htop:vserver - Enable vserver support
sys-process/lsof:rpc - support looking up RPC service info
sys-process/procps:ncurses - Build programs that use ncurses: top, slabtop, watch
virtual/ffmpeg:opus - Use the external opus library for encoding and decoding.
virtual/ffmpeg:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
virtual/linux-sources:firmware - Install linux kernel firmware
virtual/mpi:romio - Enable romio, a high-performance portable MPI-IO
virtual/mysql:embedded - Build embedded server (libmysqld)
virtual/udev:gudev - Build the gobject interface library
virtual/udev:kmod - Enable kernel module loading/unloading support using sys-apps/kmod
www-apache/mod_extract_forwarded:mod_proxy - Enable support for Apache's internal proxy
www-apache/mod_musicindex:archive - Add archive support
www-apache/mod_musicindex:cache - Add File cache support
www-apache/mod_musicindex:mysql - Add MySQL cache support
www-apache/mod_nss:ecc - enable Elliptical Curve Cyptography
www-apache/mod_security:curl - Build the ModSecurity Audit Log Collector (mlogc) that depends on net-misc/curl.
www-apache/mod_security:geoip - Configure ModSecurity to query the GeoIP database from MaxMind, provided by dev-libs/geoip. This flag only controls the default configuration, as the GeoIP query code is part of ModSecurity's source code.
www-apache/mod_security:jit - Add support for the PCRE Just-in-Time optimisation, as enabled by dev-libs/libpcre with jit USE flag enabled. Might not be available on hardened systems.
www-apache/mod_suphp:checkpath - Check if script resides in DOCUMENT_ROOT
www-apache/mod_suphp:mode-force - Run scripts with UID/GID specified in Apache configuration
www-apache/mod_suphp:mode-owner - Run scripts with owner UID/GID
www-apache/mod_suphp:mode-paranoid - Run scripts with owner UID/GID but also check if they match the UID/GID specified in the Apache configuration
www-apache/pwauth:domain-aware - Ignore leading domain names in username (Windows compat)
www-apache/pwauth:faillog - Log failed login attempts
www-apache/pwauth:ignore-case - Ignore string case in username (mostly Windows compat)
www-apps/389-dsgw:adminserver - Install DSGW with Admin Server
www-apps/ampache:transcode - Install optional dependencies for transcoding support
www-apps/bitten:server - Install master instance that integrates itself with Trac
www-apps/blohg:git - Enable Git support
www-apps/blohg:mercurial - Enable Mercurial support
www-apps/bugzilla:extras - Optional Perl modules
www-apps/bugzilla:modperl - Enable www-apache/mod_perl support
www-apps/cgit:highlight - Enable source code highlighting
www-apps/cgit:jit - If the lua flag is enabled, jit uses LuaJIT instead of vanilla Lua
www-apps/cgit:lua - Enable support for Lua scripting
www-apps/drupal:accelerator - Add dependency on a php accelerator
www-apps/drupal:uploadprogress - Install dev-php/pecl-uploadprogress package
www-apps/egroupware:gallery - Install gallery2 port for eGW
www-apps/egroupware:jpgraph - Add dev-php/jpgraph support
www-apps/gallery:netpbm - Add media-libs/netpbm support
www-apps/gallery:unzip - Add app-arch/unzip support for the archive upload module
www-apps/gallery:zip - Add app-arch/zip for the zip download module
www-apps/gitit:plugins - enables optional plugin runtime loader
www-apps/horde-passwd:clearpasswd - Enables cleartext password storage in the vpopmail files
www-apps/ikiwiki:extras - Installs additional modules used by ikiwiki plugins
www-apps/lxr:freetext - Adds support for freetext search using swish-e
www-apps/nikola:assets - Support web asset management through dev-python/assets
www-apps/nikola:charts - Support chart generation through dev-python/pygal
www-apps/nikola:hyphenation - Add hyphenation support through dev-python/pyphen
www-apps/nikola:ipython - Add IPython notebook compilation and LESS support
www-apps/nikola:jinja - Add support for dev-python/jinja as alternative templating engine to Mako
www-apps/nikola:markdown - Add support for Markdown as alternative markup language to reStructuredText
www-apps/novnc:nova - Installs Openstack Nova for it's libraries
www-apps/otrs:mod_perl - Provide all dependencies for use of mod_perl instead of cgi
www-apps/postfixadmin:vacation - Install vacation.pl script and dependencies
www-apps/redmine:openid - Enable support for OpenID
www-apps/redmine:passenger - Enable support for www-apache/passenger
www-apps/rt:lighttpd - Add www-servers/lighttpd support
www-apps/sitebar:plugins - Install optional plugins
www-apps/sugarcrm:json - Add JSON (JavaScript Object Notation) support
www-apps/trac:i18n - Enable support for i18n with dev-python/Babel
www-apps/tt-rss:daemon - Install additional init scripts for automated RSS updates
www-apps/venus:django - Support for django template style to config files
www-apps/venus:genshi - Support for genshi style to config files
www-apps/venus:redland - Enable support for Redland RDF
www-apps/viewvc:cvsgraph - Add dev-vcs/cvsgraph support to show graphical views of revisions and branches
www-apps/viewvc:mod_wsgi - Add www-apache/mod_wsgi support
www-apps/viewvc:pygments - Add dev-python/pygments support for syntax highlighting
www-apps/webdavcgi:rcs - Adds support for a revision controlled backend with RCS (dev-vcs/rcs)
www-client/chromium:aura - Enable Aura, new UI architecture that is GPU accelerated, see http://www.chromium.org/developers/design-documents/aura .
www-client/chromium:bindist - Disable patent-encumbered HTML5 video codecs
www-client/chromium:tcmalloc - Use bundled tcmalloc instead of system malloc.
www-client/dwb:gtk3 - Link against x11-libs/gtk+:3 instead of x11-libs/gtk+:2
www-client/elinks:bittorrent - Enable support for the BitTorrent protocol
www-client/elinks:finger - Enable support for the finger protocol
www-client/elinks:gopher - Enable support for the gopher protocol
www-client/elinks:mouse - Make elinks to grab all mouse events
www-client/epiphany:introspection - Use dev-libs/gobject-introspection for introspection
www-client/epiphany:nss - Import passwords from older gecko based www-client/epiphany keyring.
www-client/firefox:bindist - Disable official Firefox branding (icons, name) which are not binary-redistributable according to upstream.
www-client/firefox:custom-optimization - Fine-tune custom compiler optimizations (-Os, -O0, -O1, -O2, -O3)
www-client/firefox:ipc - Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes
www-client/firefox:minimal - Prevent sdk and headers from being installed
www-client/firefox:pgo - Add support for profile-guided optimization using gcc-4.5, for faster binaries. This option will double the compile time.
www-client/firefox:system-cairo - Use the system-wide x11-libs/cairo Use system cairo instead of bundled.
www-client/firefox:system-icu - Use the system-wide dev-libs/icu Use system icu instead of bundled.
www-client/firefox:system-jpeg - Use the system-wide media-libs/libjpeg-turbo Use system jpeg instead of bundled.
www-client/firefox:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
www-client/firefox:webm - Use system media-libs/libvpx for HTML5 WebM video support.
www-client/google-chrome:plugins - Add system plugins path to launcher
www-client/google-chrome-beta:plugins - Add system plugins path to launcher
www-client/google-chrome-unstable:plugins - Add system plugins path to launcher
www-client/jumanji:deprecated - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
www-client/luakit:luajit - Use the lua just-in-time compiler dev-lang/luajit instead of dev-lang/lua, which should make luakit faster.
www-client/lynx:gnutls - Use gnutls library for HTTPS support (openssl is the default library for HTTPS support).
www-client/lynx:ssl - Enable HTTPS support.
www-client/midori:deprecated - Enable GTK+-2 instead of GTK+-3 because of external plugins like adobe-flash
www-client/midori:unique - Enable single instance support using dev-libs/libunique
www-client/midori:webkit2 - Enable WebKit2 API that splits web content rendering and application UI into separate processes
www-client/midori:zeitgeist - Add support for Zeitgeist event tracking system
www-client/netsurf:bmp - BMP bitmap image support (media-libs/libnsbmp)
www-client/netsurf:fbcon_frontend_able - Use framebuffer frontend able
www-client/netsurf:fbcon_frontend_linux - Use framebuffer frontend linux
www-client/netsurf:fbcon_frontend_sdl - Use framebuffer frontend sdl
www-client/netsurf:fbcon_frontend_vnc - Use framebuffer frontend vnc
www-client/netsurf:fbcon_frontend_x - Use framebuffer frontend X
www-client/netsurf:pdf-writer - PDF output support (media-libs/libharu)
www-client/netsurf:rosprite - RISC OS Sprite bitmap image support (media-libs/librosprite)
www-client/netsurf:svgtiny - SVG image support via media-libs/svgatiny instead of gnome-base/librsvg
www-client/netsurf:webp - WebP image support (media-libs/libwebp)
www-client/opera:gtk - Install support libraries and runtime dependencies to support GTK+/GNOME desktop integration
www-client/opera:kde - Install support libraries and runtime dependencies to support KDE desktop integration
www-client/opera-next:gtk - Install support libraries and runtime dependencies to support GTK+/GNOME desktop integration
www-client/opera-next:kde - Install support libraries and runtime dependencies to support KDE desktop integration
www-client/qupzilla:nonblockdialogs - Enable fancy non-blocking JavaScript dialogs shown inside the page, not blocking the application window. When closing browser windows with open dialogs, this can crash the application.
www-client/rekonq:opera - Support for Opera sync handler
www-client/seamonkey:chatzilla - Build Mozilla's IRC client (default on)
www-client/seamonkey:custom-optimization - Fine-tune custom compiler optimizations (-Os, -O0, -O1, -O2, -O3)
www-client/seamonkey:ipc - Use inter-process communication between tabs and plugins. Allows for greater stability in case of plugin crashes
www-client/seamonkey:roaming - Build roaming extension support (default on)
www-client/seamonkey:system-cairo - Use the system-wide x11-libs/cairo Use system cairo instead of bundled.
www-client/seamonkey:system-icu - Use the sytem-wide dev-libs/icu Use system icu indead of bundled.
www-client/seamonkey:system-jpeg - Use the system-wide media-libs/libjpeg-turbo Use system jpeg instead of bundled.
www-client/seamonkey:system-sqlite - Use the system-wide dev-db/sqlite installation with secure-delete enabled
www-client/uget:aria2 - Enable support for net-misc/aria2 through xmlrpc. You'll find the plugin in the app's settings.
www-client/uget:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
www-client/uget:hide-temp-files - Make temporary files that are used while downloading hidden.
www-client/uzbl:browser - Install the uzbl-browser script
www-client/uzbl:experimental - Enable experimental branch
www-client/uzbl:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
www-client/uzbl:helpers - Optional tools used by uzbl scripts
www-client/uzbl:tabbed - Install the uzbl-tabbed script
www-client/w3m:lynxkeymap - If you prefer Lynx-like key binding
www-client/weboob:fast-libs - Enable fast libs
www-client/weboob:secure-updates - Enable secure updates
www-misc/litmus:libproxy - Support for automatic proxy configuratino management through net-libs/libproxy.
www-misc/litmus:libxml2 - Use dev-libs/libxml2 to parse XML
www-misc/litmus:pkcs11 - Support for PKCS #11 through PaKChoiS (dev-libs/pakchois).
www-misc/monitorix:evms - Make use of utilities for the IBM Enterprise Volume Management System with sys-fs/evms.
www-misc/monitorix:hddtemp - Use SMART to monitor the temperature of hard drives with app-admin/hddtemp.
www-misc/monitorix:httpd - Enables the CGI webserver with any package that satisfies virtual/httpd-cgi.
www-misc/monitorix:lm_sensors - Additional hardware mnitoring sensors with sys-apps/lm_sensors.
www-misc/monitorix:postfix - Analyze postfix logs with net-mail/pflogsumm.
www-misc/vdradmin-am:vdr - Support for media-video/vdr. Disable this if the VDR you want to control runs at a remote machine.
www-misc/xxv:themes - Enable more themes via x11-themes/xxv-skins
www-plugins/adobe-flash:kde - Enables a KCM plugin for configuring flash player preferences
www-plugins/chrome-binary-plugins:flash - Install Chrome's native Pepper Flash.
www-plugins/chrome-binary-plugins:pdf - Install Chrome's native PDF reader plugin.
www-plugins/gnash:agg - Rendering based on the Anti-Grain Geometry Rendering Engine library
www-plugins/gnash:cygnal - Enable building of the cygnal server
www-plugins/gnash:dump - Enable dump output module for creating video from SWF
www-plugins/gnash:egl - Enable EGL support for the OpenVG, OpenGL and X11 renderers
www-plugins/gnash:gconf - Enable GConf configuration backend
www-plugins/gnash:harden - Enable upstream recommended hardening build flags (may conflict with system ones)
www-plugins/gnash:jemalloc - Use dev-libs/jemalloc for allocations
www-plugins/gnash:openvg - Rendering based on the OpenVG graphics acceleration API
www-plugins/gnash:sdl-sound - Enable SDL audio output for the standalone player
www-plugins/gnash:ssh - Enable using SSH for network authentication in libnet
www-plugins/gnash:ssl - Enable directly using OpenSSL in libnet (not needed for nsplugin ssl support)
www-plugins/gnash:vaapi - Enables VAAPI (Video Acceleration API) for hardware decoding
www-plugins/google-talkplugin:system-libCg - Use system libCg instead of bundled one
www-plugins/lightspark:gles - Replace default OpenGL renderer with GLESv2
www-plugins/lightspark:rtmp - Enable Real Time Messaging Protocol using librtmp
www-servers/apache:apache2_modules_access_compat - Group authorizations based on host (name or IP address). Available as a compatibility module with previous versions.
www-servers/apache:apache2_modules_authn_core - Provides core authentication capabilities common to all authentication providers (functionality provided by authn_alias in previous versions).
www-servers/apache:apache2_modules_authz_core - Provides core authorization capabilities to various authorization/authorization modules, such as authn_file and authz_user.
www-servers/apache:apache2_modules_cache_disk - Disk based storage module for the HTTP caching filter (similar to mem_cache in previous versions).
www-servers/apache:apache2_modules_lbmethod_bybusyness - Pending request counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_byrequests - Request counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_bytraffic - Weighted traffic counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_lbmethod_heartbeat - Heartbeat traffic counting load balancer scheduler algorithm for proxy_balancer.
www-servers/apache:apache2_modules_proxy_fcgi - FCGI support module for mod_proxy.
www-servers/apache:apache2_modules_ratelimit - Ratelimit module for transfer rate management
www-servers/apache:apache2_modules_remoteip - Remotip module for logging
www-servers/apache:apache2_modules_slotmem_shm - Slot-based shared memory provider.
www-servers/apache:apache2_modules_socache_shmcb - A shared object cache provider using a high-performance cyclic buffer inside a shared memory segment.
www-servers/apache:apache2_modules_unixd - Basic (required) security for Unix-family platforms.
www-servers/apache:static - Link in apache2 modules statically rather then plugins
www-servers/apache:suexec - Install suexec with apache
www-servers/cherokee:admin - Install web based cherokee conf tool
www-servers/cherokee:coverpage - Installs the default cherokee coverpage
www-servers/cherokee:rrdtool - Enable rrdtool support
www-servers/fnord:auth - Enable HTTP authentication support
www-servers/gatling:diet - Compile against dev-libs/dietlibc
www-servers/lighttpd:libev - Enable fdevent handler
www-servers/lighttpd:memcache - Enable memcache support for mod_cml and mod_trigger_b4_dl
www-servers/lighttpd:mmap - Use mmap with files owned by lighttpd. This is a dangerous option as it may allow local users to trigger SIGBUS crashes.
www-servers/lighttpd:rrdtool - Enable rrdtool support via mod_rrdtool
www-servers/lighttpd:uploadprogress - Apply experimental patch for upload progress module
www-servers/lighttpd:webdav - Enable webdav properties
www-servers/monkeyd:debug - Enable lots of debugging info
www-servers/monkeyd:jemalloc - Use dev-libs/jemalloc for allocations
www-servers/monkeyd:minimal - Do not install shared lib and include files
www-servers/monkeyd:musl - Enable musl compatibility mode
www-servers/nginx:aio - Enables file AIO support
www-servers/nginx:http - Enable HTTP core support
www-servers/nginx:http-cache - Enable HTTP cache support
www-servers/nginx:libatomic - Use libatomic instead of builtin atomic operations
www-servers/nginx:pcre-jit - Enable JIT for pcre
www-servers/nginx:rtmp - NGINX-based Media Streaming Server
www-servers/nginx:ssl - Enable HTTPS module for http. Enable SSL/TLS support for POP3/IMAP/SMTP for mail.
www-servers/ocsigen:ocamlduce - Enables ocamlduce XML typechecking for generated web pages
www-servers/pound:dynscaler - Enable dynamic rescaling of back-end priorities
www-servers/pshs:magic - Enable automatic detection of Content-Type using libmagic (sys-apps/file)
www-servers/pshs:netlink - Use libnetlink (sys-apps/iproute2) to get network interface addresses
www-servers/resin:admin - Enable Resin admin webapp
www-servers/tomcat:extra-webapps - Build also the docs and examples webapp
www-servers/uwsgi:carbon - Enable support for sending statistics to a carbon server (see http://projects.unbit.it/uwsgi/wiki/Carbon).
www-servers/uwsgi:embedded - Embed plugins instead of building them as real plugins. When disabling this USE flag make sure you specify all used plugins in your uWSGI configuration. Note: Language plugins will always be built as real plugins.
www-servers/uwsgi:erlang - Let the uWSGI server as as an Erlang C-Node and exchange messages and rpc with Erlang nodes. Together with the USE=python this enables erlang support in python (see the mappings table in http://projects.unbit.it/uwsgi/wiki/ErlangIntegration).
www-servers/uwsgi:gevent - Use dev-python/gevent for async request dispatching and as LoopEngine (see http://projects.unbit.it/uwsgi/wiki/Gevent).
www-servers/uwsgi:graylog2 - Enable logging to graylog2 (see http://graylog2.org/).
www-servers/uwsgi:jemalloc - Use dev-libs/jemalloc instead of libc's malloc
www-servers/uwsgi:json - Support json as a configuration file format.
www-servers/uwsgi:nagios - Add nagios-friendly logging output (see http://projects.unbit.it/uwsgi/wiki/Nagios).
www-servers/uwsgi:probepg - Add the PostgreSQL probe plugin (see http://projects.unbit.it/uwsgi/wiki/DjangoDBHA).
www-servers/uwsgi:python_gevent - Use dev-python/gevent for async request dispatching and as LoopEngine (see http://projects.unbit.it/uwsgi/wiki/Gevent).
www-servers/uwsgi:routing - Enable routing support
www-servers/uwsgi:rrdtool - Enable support for writing requests data in RRD files.
www-servers/uwsgi:rsyslog - Support direct logging to a app-admin/rsyslog socket (without going through the syslog interface).
www-servers/uwsgi:spooler - Build a plugin which gives a network spooler (see http://projects.unbit.it/uwsgi/wiki/Spooler).
www-servers/uwsgi:yajl - Use dev-libs/yajl instead of dev-libs/jansson for parsing JSON configuration files (if USe=json is set)
www-servers/uwsgi:yaml - Support yaml as a configuration file format.
www-servers/uwsgi:zeromq - Enable logging and deployment via ZeroMQ.
www-servers/varnish:jemalloc - Use dev-libs/jemalloc for allocations
www-servers/varnish:tools - Build additional tools: varnishhist, varnishstat, varnishtop, varnishsizes
x11-apps/ardesia:cwiid - cwiid support: collection of Linux tools written in C for interfacing to the Nintendo Wiimote.
x11-apps/mesa-progs:egl - Build EGL utilities
x11-apps/mesa-progs:gles1 - Build OpenGL ES 1 utilities
x11-apps/mesa-progs:gles2 - Build OpenGL ES 2 utilities
x11-apps/xdm:consolekit - Enable native sys-auth/consolekit support
x11-apps/xdm:xdm-auth - Enable XDM-AUTHENTICATION-1 support
x11-apps/xdpyinfo:dmx - Builds support for Distributed Multiheaded X x11-base/xorg-server
x11-apps/xinit:minimal - Control dependencies on legacy apps (xterm, twm, ...). Safe to enable if you use a modern desktop environment.
x11-apps/xsm:rsh - This allows the use of rsh (remote shell) and rcp (remote copy).
x11-base/xorg-server:dmx - Build the Distributed Multiheaded X server
x11-base/xorg-server:kdrive - Build the kdrive X servers
x11-base/xorg-server:tslib - Build with tslib support for touchscreen devices
x11-base/xorg-server:unwind - Enable libunwind usage for backtraces
x11-base/xorg-server:xnest - Build the Xnest server
x11-base/xorg-server:xorg - Build the Xorg X server (HIGHLY RECOMMENDED)
x11-base/xorg-server:xvfb - Build the Xvfb server
x11-drivers/ati-drivers:disable-watermark - Do a potentially dangerous binary search and replace to disable watermark
x11-drivers/ati-drivers:modules - Build the kernel modules
x11-drivers/ati-drivers:pax_kernel - Enable pax kernel specific patches
x11-drivers/ati-drivers:qt4 - Install qt4 dependent optional tools (e.g Catalyst Control Panel)
x11-drivers/nvidia-drivers:X - Install the X.org driver, OpenGL libraries, XvMC libraries, and VDPAU libraries
x11-drivers/nvidia-drivers:pax_kernel - PaX patches from the PaX project
x11-drivers/nvidia-drivers:tools - Install additional tools such as nvidia-settings
x11-drivers/nvidia-drivers:uvm - Install the Unified Memory kernel module (nvidia-uvm) for sharing memory between CPU and GPU in CUDA programs
x11-drivers/xf86-video-ati:glamor - Enable Glamor OpenGL 2D acceleration
x11-drivers/xf86-video-geode:ztv - Enable building the V4L2 ZTV driver
x11-drivers/xf86-video-intel:glamor - Enable Glamor OpenGL 2D acceleration
x11-drivers/xf86-video-intel:sna - Enable SandyBridge's New Acceleration (useful on all chipsets, not just SandyBridge)
x11-drivers/xf86-video-intel:uxa - Enable UMA Acceleration Architecture
x11-drivers/xf86-video-intel:xvmc - Enables X-Video Motion Compensation support
x11-drivers/xf86-video-openchrome:viaregtool - Install registers dumper tool
x11-drivers/xf86-video-qxl:xspice - Build the xspice driver
x11-libs/agg:gpc - Enable gpc polygon clipper library
x11-libs/cairo:drm - Use Linux DRM for backend acceleration
x11-libs/cairo:gallium - Use Mesa's Gallium backend for acceleration
x11-libs/cairo:gles2 - Use OpenGL ES 2 backend for acceleration.
x11-libs/cairo:glib - Compile with GLib Object System support
x11-libs/cairo:legacy-drivers - Include the buggy gradients patch (for legacy drivers, such as nvidia-drivers older than 304.30)
x11-libs/cairo:opengl - Use Mesa backend for acceleration
x11-libs/cairo:openvg - Use OpenVG for backend acceleration
x11-libs/cairo:valgrind - Built-in support to mark memory regions
x11-libs/cairo:xlib-xcb - Use XCB renderer backend for acceleration over xlib
x11-libs/colord-gtk:vala - Generate bindings for dev-lang/vala
x11-libs/fltk:games - Builds and installs some extra games
x11-libs/glamor:gles - Build glamor based on gles2
x11-libs/gtk+:colord - Use x11-misc/colord for color management in printing
x11-libs/gtk+:egl - Use EGL surfaces and Cairo GL in the wayland backend. This flag has no effect on X or aqua backends.
x11-libs/gtk+:packagekit - Enable support for the distro-neutral package manager GUI app-admin/packagekit in application chooser
x11-libs/gtk+extra:introspection - Use dev-libs/gobject-introspection for introspection
x11-libs/gtkdatabox:glade - Build with libglade and glade-3 supports, which includes a glade's module for GtkDataBox widget
x11-libs/gtkmathview:mathml - Install additional fonts for proper mathml support.
x11-libs/gtkmathview:t1lib - Enable media-libs/t1lib support
x11-libs/gtksourceview:glade - Install a glade catalog file
x11-libs/libSM:uuid - Use UUID for session identification instead of IP address and system time.
x11-libs/libXaw:deprecated - Install deprecated Xaw6 library.
x11-libs/libXfont:bzip2 - Support bzip2 compressed PCF fonts.
x11-libs/libXfont:truetype - Use media-libs/freetype for font rasterization.
x11-libs/libaosd:pango - Enable the textual helpers (requires pangocairo).
x11-libs/libaosd:tools - Install the aosd_cat tool (requires glib-2.0).
x11-libs/libdesktop-agnostic:gconf - Enable GConf as configuration backend
x11-libs/libdesktop-agnostic:glade - Install the Glade catalog for the desktop-agnotstic GTK widgets.
x11-libs/libdesktop-agnostic:introspection - Use dev-libs/gobject-introspection for introspection
x11-libs/libdrm:libkms - Enable building of libkms, a library for applications to interface with KMS
x11-libs/libfm:automount - Use gnome-base/gvfs for automounting
x11-libs/libfm:udisks - Use libfm's udisks-based volume monitor implementation instead of using the one from gvfs
x11-libs/libfm:vala - Support custom actions in menus
x11-libs/libmatchbox:pango - Enable x11-libs/pango support
x11-libs/libmatchbox:xsettings - Enable the use of xsettings for settings management
x11-libs/libnotify:introspection - Use dev-libs/gobject-introspection for introspection
x11-libs/libnotify:symlink - Create symlink from libnotify-notify-send to notify-send
x11-libs/libqxt:berkdb - Build the QxtBerkeley module
x11-libs/libqxt:sql - Build the QxtSql module
x11-libs/libqxt:web - Build the QxtWeb module
x11-libs/libqxt:zeroconf - Build the QxtZeroconf module
x11-libs/libva:drm - Enables VA/DRM API support.
x11-libs/libva:egl - Enables EGL support.
x11-libs/libva-intel-driver:drm - Enables VA/DRM API support.
x11-libs/libwnck:tools - Install wnckprop-3 and wnck-urgency-monitor-3 command-line tools
x11-libs/libxcb:xkb - Enable the XCB keyboard extension
x11-libs/libxklavier:introspection - Use dev-libs/gobject-introspection for introspection
x11-libs/motif:motif22-compatibility - Compatibility with Open Motif 2.2
x11-libs/mx:glade - Build the dev-util/glade catalog files
x11-libs/mx:introspection - Use dev-libs/gobject-introspection for introspection
x11-libs/pixman:loongson2f - Enable Loongson2f MMI optimizations.
x11-libs/qwt:mathml - Use the MathML renderer of the Qt solutions package.
x11-libs/vte:glade - Provide integration with dev-util/glade.
x11-libs/vte:introspection - Use dev-libs/gobject-introspection for introspection
x11-libs/wxGTK:gnome - Use gnome-base/libgnomeprintui for printing tasks.
x11-libs/wxGTK:gstreamer - Enable the wxMediaCtrl class for playing audio and video through gstreamer.
x11-libs/wxGTK:sdl - Use Simple Directmedia Layer (media-libs/libsdl) for audio.
x11-misc/bmpanel:libev - Use the libev event loop interface
x11-misc/bmpanel:libevent - Use the libevent event loop interface
x11-misc/bumblebee:bbswitch - Add dependency on sys-kernel/bbswitch for PM feature
x11-misc/cdm:consolekit - Enable native consolekit support
x11-misc/colord:extra-print-profiles - Generate extra print profiles. Warning: significant build time and memory requirements.
x11-misc/colord:gusb - Enable dev-libs/libgusb support, needed for colorimeter drivers
x11-misc/colord:vala - Generate bindings for dev-lang/vala
x11-misc/compton:drm - Enable VSync with DRM_IOCTL_WAIT_VBLANK
x11-misc/compton:opengl - Enable VSync with SGI_swap_control OpenGL extension
x11-misc/dmenu:xft - Enable unofficial x11-libs/libXft support
x11-misc/dunst:dunstify - Experimental replacement for notify-send.
x11-misc/etm:ical - Enable export of ical format files by depending on dev-python/icalendar
x11-misc/fbpager:xrender - Enable transparency support via x11-libs/libXrender
x11-misc/i3status:filecaps - Linux capabilities library is required for i3status to be able to read net bandwith
x11-misc/lightdm:branding - Replace original gnome background with one from Gentoo ten project
x11-misc/lightdm:gtk - Pull in the gtk+ greeter
x11-misc/lightdm:introspection - Use dev-libs/gobject-introspection for introspection
x11-misc/lightdm:kde - Pull in the kde greeter
x11-misc/lightdm:razor - Pull in the razorqt greeter
x11-misc/openbox-menu:icons - Turn on to let icons appear in menus
x11-misc/openbox-menu:svg - Support svg icons (needs icons enabled)
x11-misc/rednotebook:libyaml - enable libyaml support
x11-misc/rednotebook:spell - enable gtk-spell support
x11-misc/redshift:geoclue - Control dependency on app-misc/geoclue
x11-misc/revelation:applet - Enable applet for gnome-base/gnome-panel
x11-misc/rodent:experimental - Build experimental plugins (obexfs, curlftpfs, ecryptfs, cifs and samba)
x11-misc/rss-glx:quesoglc - Enable support for OpenGL Character Renderer
x11-misc/shutter:drawing - Enables drawing tool
x11-misc/shutter:webphoto - Enables screenshots of websites
x11-misc/slim:consolekit - Enable native consolekit support
x11-misc/stalonetray:graceful-exit - use non-portable hack to exit gracefuly on signal
x11-misc/tint2:battery - Enable battery status plugin
x11-misc/tint2:examples - Install tint2rc examples
x11-misc/tint2:tint2conf - Build/Install tint2conf as well
x11-misc/vnc2swf:x11vnc - Install script that depends on x11vnc
x11-misc/wbar:gtk - Enables the gtk-based wbar-config GUI
x11-misc/x11vnc:system-libvncserver - Build x11vnc against the system libvncserver (experimental)
x11-misc/x11vnc:tk - Support the simple tcl/tk -gui option
x11-misc/xlockmore:xlockrc - Enables xlockrc for people without PAM
x11-misc/xmobar:mail - Support the mail plugin. Pulls dependency dev-haskell/hinotify.
x11-misc/xmobar:mpd - Support mpd plugin
x11-misc/xmobar:mpris - Enables MPRIS v1, v2 support
x11-misc/xmobar:threaded - Use threaded GHC runtime
x11-misc/xmobar:timezone - Enables localized date support
x11-misc/xscreensaver:gdm - Use gdmflexiserver from gnome-base/gdm instead of x11-misc/lightdm
x11-misc/xscreensaver:new-login - Enable user switching support using gdmflexiserver (x11-misc/lightdm) or kdmctl (kde-base/kdm)
x11-plugins/bfm:gkrellm - Enable building of app-admin/gkrellm module
x11-plugins/compiz-plugins-extra:gconf - Install GConf schemas for the plugins, needed when using the GConf-based configuration backend in x11-wm/compiz.
x11-plugins/compiz-plugins-main:gconf - Install GConf schemas for the plugins, needed when using the GConf-based configuration backend in x11-wm/compiz.
x11-plugins/pidgin-mbpurple:twitgin - Enable graphical plugin for Gtk+ interface of Pidgin.
x11-plugins/pidgin-sipe:ocs2005-message-hack - Disable message timeout for OCS2005 clients which causes "false" not delivered error messages
x11-plugins/pidgin-sipe:openssl - Enable crypto support via dev-libs/openssl
x11-plugins/pidgin-sipe:telepathy - Support use as a telepathy backend
x11-plugins/pidgin-sipe:voice - Enable experimental voice/video support
x11-plugins/purple-plugin_pack:talkfilters - Enable support for app-text/talklfilters
x11-plugins/screenlets:svg - Highly Recommended: Enable SVG graphics via dev-python/librsvg-python
x11-plugins/vicious:contrib - Install extra widgets, some for less common hardware, some contributed by Vicious users.
x11-plugins/wmfire:session - Enable session management
x11-plugins/wmsysmon:high-ints - Enable support for monitoring 24 interrupts. Useful on SMP machines
x11-terms/aterm:background - Enable background image support via media-libs/libafterimage
x11-terms/aterm:xgetdefault - Enable resources via X instead of aterm small version
x11-terms/eterm:escreen - Enable built-in app-misc/screen support
x11-terms/eterm:utempter - Include libutempter support
x11-terms/gnome-terminal:nautilus - Build gnome-base/nautilus extension
x11-terms/hanterm:utempter - Records user logins. Useful on multi-user systems
x11-terms/mlterm:ibus - Enable app-i18n/ibus support
x11-terms/mlterm:libssh2 - Enable net-libs/libssh2 support
x11-terms/mlterm:scim - Enable app-i18n/scim support
x11-terms/mlterm:uim - Enable app-i18n/uim support
x11-terms/mrxvt:menubar - Enable mrxvt menubar
x11-terms/mrxvt:utempter - REcords user logins. Useful on multi-user systems
x11-terms/rxvt:linuxkeys - Define LINUX_KEYS (changes Home/End key)
x11-terms/rxvt:xgetdefault - Enable resources via X instead of rxvt small version
x11-terms/rxvt-unicode:256-color - Enable 256 color support
x11-terms/rxvt-unicode:alt-font-width - Calculate the font width using a different method
x11-terms/rxvt-unicode:blink - Enable blinking text
x11-terms/rxvt-unicode:buffer-on-clear - Store visible output to history buffer when clearing the screen with ctrl-l. Read https://bbs.archlinux.org/viewtopic.php?id=129302
x11-terms/rxvt-unicode:fading-colors - Enable colors fading when off focus
x11-terms/rxvt-unicode:focused-urgency - Enable the urgent flag when a terminal window is focused
x11-terms/rxvt-unicode:font-styles - Enable support for bold and italic fonts
x11-terms/rxvt-unicode:iso14755 - Enable ISO-14755 support
x11-terms/rxvt-unicode:mousewheel - Enable scrolling via mouse wheel or buttons 4 and 5
x11-terms/rxvt-unicode:perl - Enable perl script support. You can still disable this at runtime with -pe ""
x11-terms/rxvt-unicode:pixbuf - Enable transparency support using gtk's pixbuf
x11-terms/rxvt-unicode:secondary-wheel - Support for wheel scrolling on secondary screens (like mutt). Read http://lists.schmorp.de/pipermail/rxvt-unicode/2011q4/001491.html
x11-terms/rxvt-unicode:unicode3 - Use 21 instead of 16 bits to represent unicode characters
x11-terms/rxvt-unicode:wcwidth - Enable wide char width support
x11-terms/terminator:libnotify - Enables desktop notifications viadev-python/notify-python
x11-terms/xterm:openpty - Use openpty() in preference to posix_openpt()
x11-terms/xterm:toolbar - Enable the xterm toolbar to be built
x11-themes/bespin:windeco - Enable window decoration for KWin.
x11-themes/comix-xcursors:lefthanded - Install lefthanded version of theme in addition to default one
x11-themes/comix-xcursors:opaque - Install non-transparent version of theme in addition to default one
x11-themes/gentoo-artwork:grub - Install extra sys-boot/grub themes
x11-themes/gentoo-artwork:icons - Install icons
x11-themes/gentoo-artwork:lilo - Install extra sys-boot/lilo themes
x11-themes/gentoo-artwork:pixmaps - Install pixmaps
x11-themes/gtk-engines-murrine:animation-rtl - Progressbar animation from right to left
x11-themes/gtk-engines-murrine:themes - Pull in themes via x11-themes/murrine-themes
x11-themes/gtk-engines-nodoka:animation-rtl - Progressbar animation from right to left
x11-themes/gtk-engines-qtcurve:mozilla - Install GUI theme tweaks for mozilla based browsers www-client/firefox
x11-themes/kfaenza:additional - Install additional KFaenza icons. See third homepage for details
x11-themes/light-themes:gtk3 - Support GTK 3.x, too
x11-themes/qtcurve:kde - Enable KDE4 support. This adds a QtCurve configuration module to KDE's SystemSettings
x11-themes/qtcurve:windeco - Enable window decoration for KWin
x11-themes/redhat-artwork:audacious - Install media-sound/audacious theme
x11-themes/redhat-artwork:cursors - Install Bluecurve cursors
x11-themes/redhat-artwork:gdm - Install Bluecurve gnome-base/gdm theme
x11-themes/redhat-artwork:icons - Install Bluecurve icons
x11-themes/redhat-artwork:kdm - Install Bluecurve kde-base/kdm theme
x11-themes/redhat-artwork:nautilus - Install Bluecurve gnome-base/nautilus icons
x11-themes/skinenigmang-logos:dxr3 - Install logos for lower osd color depth on dxr3 cards
x11-themes/zukitwo:gnome-shell - Install theme for gnome-base/gnome-shell
x11-wm/compiz:fuse - Enables support for the filesystem in userspace plugin through sys-fs/fuse.
x11-wm/compiz:gconf - Enable the GConf-based configuration backend; it is not required to work with GNOME, and might actually be faster if it's not used.
x11-wm/compiz-fusion:emerald - Install the x11-wm/emerald package.
x11-wm/compiz-fusion:unsupported - Install the x11-plugins/compiz-fusion-plugins-unsupported package.
x11-wm/echinus:xrandr - Enable support for multihead configuration
x11-wm/enlightenment:enlightenment_modules_access - Accessibility module designed to improve ease of use for the vision impaired and the blind
x11-wm/enlightenment:enlightenment_modules_backlight - Backlight control slider gadget
x11-wm/enlightenment:enlightenment_modules_battery - A gadget to visualize your battery status
x11-wm/enlightenment:enlightenment_modules_clock - Nice clock gadget to show current time
x11-wm/enlightenment:enlightenment_modules_comp - Enlightenment Composite Manager
x11-wm/enlightenment:enlightenment_modules_conf-applications - Allows configuration of Ibar, Restart, and Startup applications
x11-wm/enlightenment:enlightenment_modules_conf-dialogs - Configure default dialog properties
x11-wm/enlightenment:enlightenment_modules_conf-display - Used to configure your screen
x11-wm/enlightenment:enlightenment_modules_conf-edgebindings - Configure your edge bindings here
x11-wm/enlightenment:enlightenment_modules_conf-interaction - Configure Mouse and Touch input
x11-wm/enlightenment:enlightenment_modules_conf-intl - Used to select a default language
x11-wm/enlightenment:enlightenment_modules_conf-keybindings - Key, Mouse and Button control settings
x11-wm/enlightenment:enlightenment_modules_conf-menus - Configures menu behavior
x11-wm/enlightenment:enlightenment_modules_conf-paths - Specifies the Enlightenment search paths and default directories
x11-wm/enlightenment:enlightenment_modules_conf-performance - Used to configure certain performance related items as frame rates and cache settings
x11-wm/enlightenment:enlightenment_modules_conf-randr - Used to configure your screen's resolution
x11-wm/enlightenment:enlightenment_modules_conf-shelves - Shelf configuration dialog
x11-wm/enlightenment:enlightenment_modules_conf-theme - Used to configure your theme preferences
x11-wm/enlightenment:enlightenment_modules_conf-window-manipulation - Configures window raise, resistance, and maximize policies
x11-wm/enlightenment:enlightenment_modules_conf-window-remembers - Delete existing window remembers
x11-wm/enlightenment:enlightenment_modules_connman - Control Wifi and wired networks as a user
x11-wm/enlightenment:enlightenment_modules_cpufreq - Gadget to monitor and change the CPU frequency
x11-wm/enlightenment:enlightenment_modules_dropshadow - Module to add a dropshadow to windows
x11-wm/enlightenment:enlightenment_modules_everything - The run command module provides an application launcher dialog
x11-wm/enlightenment:enlightenment_modules_fileman - Enlightenment's integrated file manager
x11-wm/enlightenment:enlightenment_modules_fileman-opinfo - Can be placed on the desktop or in a shelf
x11-wm/enlightenment:enlightenment_modules_gadman - Module to manage gadgets on the desktop
x11-wm/enlightenment:enlightenment_modules_ibar - Iconic application launcher
x11-wm/enlightenment:enlightenment_modules_ibox - A home for your iconified applications
x11-wm/enlightenment:enlightenment_modules_illume2 - Illume2 - next generation of illume - special WM mode for embedded devices and set of plugins with same purpose
x11-wm/enlightenment:enlightenment_modules_mixer - A module to provide a mixer for changing volume
x11-wm/enlightenment:enlightenment_modules_msgbus - DBus Extension
x11-wm/enlightenment:enlightenment_modules_notification - notification-daemon alternative. Popup if an event occur
x11-wm/enlightenment:enlightenment_modules_pager - Gadget to allow you to visualize your virtual desktops and the windows they contain
x11-wm/enlightenment:enlightenment_modules_quickaccess - Enlightenment Quickaccess Launcher
x11-wm/enlightenment:enlightenment_modules_shot - Simple screenshot+save/upload module
x11-wm/enlightenment:enlightenment_modules_start - Enlightenment's "Start" button equivalent
x11-wm/enlightenment:enlightenment_modules_syscon - This module provides a unified popup dialog for all the system actions in Enlightenment
x11-wm/enlightenment:enlightenment_modules_systray - system tray that hold applications icons like Skype, Pidgin, Kopete and others
x11-wm/enlightenment:enlightenment_modules_tasks - Gadget to allow you to switch tasks
x11-wm/enlightenment:enlightenment_modules_temperature - Temperature monitor
x11-wm/enlightenment:enlightenment_modules_tiling - Positions/resizes your windows tilingly
x11-wm/enlightenment:enlightenment_modules_winlist - A module to show the list of client applications presently running
x11-wm/enlightenment:enlightenment_modules_wizard - First Run Wizard
x11-wm/enlightenment:enlightenment_modules_xkbswitch - Keyboard layout configuration and switcher
x11-wm/enlightenment:pango - Enable pango font rendering
x11-wm/enlightenment:udev - Use sys-fs/udev to determine available devices
x11-wm/enlightenment:ukit - Use upower/udisks to automount devices
x11-wm/enlightenment:xrandr - Enable support for the X xrandr extension
x11-wm/fluxbox:bidi - Enable bidirectional language support with dev-libs/fribidi
x11-wm/fluxbox:slit - Enables the fluxbox slit (or dock)
x11-wm/fluxbox:toolbar - Enables the fluxbox toolbar
x11-wm/fvwm:gtk2-perl - Enable GTK2 Perl bindings
x11-wm/fvwm:lock - Enable screen locking
x11-wm/fvwm:netpbm - Enable NetPBM support (used by FvwmScript-ScreenDump)
x11-wm/fvwm:rplay - Enable rplay support
x11-wm/fvwm:stroke - Mouse Gesture support
x11-wm/i3:pango - Use x11-libs/pango to render text in order to support fonts which have more glyphs (e.g. Kanji). See RELEASE-NOTES for more information
x11-wm/matchbox-common:pda - Support for pda folders
x11-wm/matchbox-desktop:dnotify - Use the linux kernel directory notification feature.
x11-wm/matchbox-panel:dnotify - Use the linux kernel directory notification feature.
x11-wm/matchbox-panel:lowres - Optimize for low resolution screens.
x11-wm/muffin:introspection - Use dev-libs/gobject-introspection for introspection
x11-wm/musca:apis - Optionally install the experimental `apis' window manager
x11-wm/musca:xlisten - Optionally install the xlisten utility
x11-wm/notion:xrandr - Add support for xrandr
x11-wm/openbox:python - Install the python xdg files for xdg autostart(for compatibility with old ebuilds)
x11-wm/openbox:session - Enables support for session managers
x11-wm/openbox:xdg - Install the python xdg files for xdg autostart
x11-wm/pekwm:contrib - Install optional extras in the documentation directory
x11-wm/pekwm:themes - Install additional themes
x11-wm/ratpoison:history - Use sys-libs/readline for history handling
x11-wm/ratpoison:sloppy - Install sloppy, a focus-follows-mouse implementation for ratpoison
x11-wm/stumpwm:clisp - Use CLISP for the runtime
x11-wm/stumpwm:sbcl - Use SBCL for the runtime
x11-wm/subtle:xrandr - Enable support for the X RandR extension
x11-wm/subtle:xtest - Enable support for the XTest extension
x11-wm/vtwm:rplay - Enable rplay support, needed for sound.
x11-wm/windowmaker:modelock - Enable XKB language status lock support. README says: "If you don't know what it is you probably don't need it."
x11-wm/windowmaker:vdesktop - Enable dynamic virtual desktop (conflicts with software that works on the edges of the screen)
x11-wm/windowmaker:xrandr - Enable XRandR window extension support
x11-wm/xmonad:default-term - Pull terminal specified in default xmonad config to be a bit less hostile by default.
x11-wm/xpra:client - Build client-side code
x11-wm/xpra:clipboard - Enable clipboard support
x11-wm/xpra:csc - Enable csc softscaler support
x11-wm/xpra:dec_av - Enable dec_avcodec support
x11-wm/xpra:dec_av2 - Enable dec_avcodec2 support
x11-wm/xpra:rencode - Enable rencode support
x11-wm/xpra:server - Build server-side code
x11-wm/xpra:vpx - Enable vpx image format support
x11-wm/xpra:webp - Enable webp image format support
xfce-base/libxfce4ui:glade - Build support for Glade 3's GtkBuilder implementation
xfce-base/libxfcegui4:glade - Build glade bindings
xfce-base/xfce4-session:consolekit - Enable authentication support using sys-auth/consolekit
xfce-base/xfce4-session:gnome-keyring - Enable password storage support using gnome-base/gnome-keyring
xfce-base/xfce4-settings:libcanberra - Enable sound event support using media-libs/libcanberra
xfce-base/xfce4-settings:xklavier - Enable keyboard layout selection support using x11-libs/libxklavier
xfce-base/xfdesktop:thunar - Build support for desktop icons (for example, launchers and folders)
xfce-extra/tumbler:odf - Enable support for .odf thumbnailers by using gnome-extra/libgsf
xfce-extra/xfce4-clipman-plugin:qrcode - Enable support for media-gfx/qrencode
xfce-extra/xfce4-mpc-plugin:libmpd - Build using media-libs/libmpd backend, instead of native fallback which is preferred
xfce-extra/xfce4-playercontrol-plugin:audacious - Enable Audacious support
xfce-extra/xfce4-playercontrol-plugin:mpd - Enable Music Player Daemon support
xfce-extra/xfce4-power-manager:udisks - Pull in sys-fs/udisks for spindown support
xfce-extra/xfce4-soundmenu-plugin:glyr - Enable music metadata searchengine support using media-libs/glyr
xfce-extra/xfce4-soundmenu-plugin:lastfm - Enable last.fm support using media-libs/libclastfm
xfce-extra/xfce4-taskmanager:gksu - Build against x11-libs/libgksu to provide "Run as root" option in the application's menu
xfce-extra/xfswitch-plugin:gdm - Use gdmflexiserver from gnome-base/gdm instead of x11-misc/lightdm