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400 lines
25 KiB
400 lines
25 KiB
# Copyright 1999-2024 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# Keep them sorted
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X - Add support for X11
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Xaw3d - Add support for the 3d athena widget set
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a52 - Enable support for decoding ATSC A/52 streams used in DVD
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aac - Enable support for MPEG-4 AAC Audio
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aalib - Add support for media-libs/aalib (ASCII-Graphics Library)
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accessibility - Add support for accessibility (eg 'at-spi' library)
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acl - Add support for Access Control Lists
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acpi - Add support for Advanced Configuration and Power Interface
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adns - Add support for asynchronous DNS resolution
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afs - Add OpenAFS support (distributed file system)
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alsa - Add support for media-libs/alsa-lib (Advanced Linux Sound Architecture)
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ao - Use libao audio output library for sound playback
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apache2 - Add Apache2 support
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aqua - Include support for the Mac OS X Aqua (Carbon/Cocoa) GUI
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asm - Enable using assembly for optimization
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atm - Enable Asynchronous Transfer Mode protocol support
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apparmor - Enable support for the AppArmor application security system
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appindicator - Build in support for notifications using the libindicate or libappindicator plugin
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audiofile - Add support for libaudiofile where applicable
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audit - Enable support for Linux audit subsystem using sys-process/audit
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avif - Add AV1 Image Format (AVIF) support
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bash-completion - Enable bash-completion support
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berkdb - Add support for sys-libs/db (Berkeley DB for MySQL)
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bidi - Enable bidirectional language support
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big-endian - Big-endian toolchain support
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bindist - Flag to enable or disable options for prebuilt (GRP) packages (eg. due to licensing issues)
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blas - Add support for the virtual/blas numerical library
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bluetooth - Enable Bluetooth Support
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branding - Enable Gentoo specific branding
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brotli - Enable Brotli compression support
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build - !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used for creating build images and the first half of bootstrapping [make stage1]
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bzip2 - Enable bzip2 compression support
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cairo - Enable support for the cairo graphics library
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calendar - Add support for calendars (not using mcal!)
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caps - Use Linux capabilities library to control privilege
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cdb - Add support for the CDB database engine from the author of qmail
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cdda - Add Compact Disk Digital Audio (Standard Audio CD) support
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cddb - Access cddb servers to retrieve and submit information about compact disks
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cdinstall - Copy files from the CD rather than asking the user to copy them, mostly used with games
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cdr - Add support for CD writer hardware
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cgi - Add CGI script support
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cjk - Add support for Multi-byte character languages (Chinese, Japanese, Korean)
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clamav - Add support for Clam AntiVirus software (usually with a plugin)
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colord - Support color management using x11-misc/colord
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connman - Add support for net-misc/connman
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coreaudio - Build the CoreAudio driver on Mac OS X systems
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cracklib - Support for cracklib strong password checking
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crypt - Add support for encryption -- using mcrypt or gpg where applicable
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css - Enable reading of encrypted DVDs
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cuda - Enable NVIDIA CUDA support (computation on GPU)
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cups - Add support for CUPS (Common Unix Printing System)
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curl - Add support for client-side URL transfer library
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custom-cflags - Build with user-specified CFLAGS (unsupported)
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cvs - Enable CVS (Concurrent Versions System) integration
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cxx - Build support for C++ (bindings, extra libraries, code generation, ...)
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dbi - Enable dev-db/libdbi (database-independent abstraction layer) support
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dbm - Add support for generic DBM databases
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dbus - Enable dbus support for anything that needs it (gpsd, gnomemeeting, etc)
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debug - Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
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dedicated - Add support for dedicated game servers (some packages do not provide clients and servers at the same time)
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dga - Add DGA (Direct Graphic Access) support for X
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dist-kernel - Enable subslot rebuilds on Distribution Kernel upgrades
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djvu - Support DjVu, a PDF-like document format esp. suited for scanned documents
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doc - Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally
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dri - Enable direct rendering: used for accelerated 3D and some 2D, like DMA
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dts - Enable DTS Coherent Acoustics decoder support
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dv - Enable support for a codec used by many camcorders
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dvb - Add support for DVB (Digital Video Broadcasting)
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dvd - Add support for DVDs
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dvdr - Add support for DVD writer hardware (e.g. in xcdroast)
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eds - Enable support for Evolution-Data-Server (EDS)
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egl - Enable EGL (Embedded-System Graphics Library, interfacing between windowing system and OpenGL/GLES) support
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elogind - Enable session tracking via sys-auth/elogind
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emacs - Add support for GNU Emacs
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emboss - Add support for the European Molecular Biology Open Software Suite
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encode - Add support for encoding of audio or video files
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examples - Install examples, usually source code
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exif - Add support for reading EXIF headers from JPEG and TIFF images
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expat - Enable the use of dev-libs/expat for XML parsing
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fam - Enable FAM (File Alteration Monitor) support
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fastcgi - Add support for the FastCGI interface
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fbcon - Add framebuffer support for the console, via the kernel
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ffmpeg - Enable ffmpeg/libav-based audio/video codec support
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fftw - Use FFTW library for computing Fourier transforms
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filecaps - Use Linux file capabilities to control privilege rather than set*id (this is orthogonal to USE=caps which uses capabilities at runtime e.g. libcap)
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firebird - Add support for the Firebird relational database
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flac - Add support for FLAC: Free Lossless Audio Codec
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fltk - Add support for the Fast Light Toolkit gui interface
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fontconfig - Support for configuring and customizing font access via media-libs/fontconfig
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fortran - Add support for fortran
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freetds - Add support for the TDS protocol to connect to MSSQL/Sybase databases
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freewnn - Add support for FreeWnn kana to kanji conversion engine
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ftp - Add FTP (File Transfer Protocol) support
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gd - Add support for media-libs/gd (to generate graphics on the fly)
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gdbm - Add support for sys-libs/gdbm (GNU database libraries)
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geoip - Add geoip support for country and city lookup based on IPs
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geolocation - Enable physical position determination
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ggi - Add support for media-libs/libggi (non-X video api/drivers)
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gif - Add GIF image support
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gimp - Build a plugin for the GIMP
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git - Enable git (version control system) support
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gles2 - Enable GLES 2.0 (OpenGL for Embedded Systems) support (independently of full OpenGL, see also: gles2-only)
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gles2-only - Use GLES 2.0 (OpenGL for Embedded Systems) or later instead of full OpenGL (see also: gles2)
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glut - Build an OpenGL plugin using the GLUT library
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gmp - Add support for dev-libs/gmp (GNU MP library)
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gnome - Add GNOME support
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gnome-keyring - Enable support for storing passwords via gnome-keyring
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gnuplot - Enable support for gnuplot (data and function plotting)
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gnutls - Prefer net-libs/gnutls as SSL/TLS provider (ineffective with USE=-ssl)
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gphoto2 - Add digital camera support
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gpm - Add support for sys-libs/gpm (Console-based mouse driver)
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gps - Add support for Global Positioning System
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graphicsmagick - Build and link against GraphicsMagick instead of ImageMagick (requires USE=imagemagick if optional)
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graphviz - Add support for the Graphviz library
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gsl - Use the GNU scientific library for calculations
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gsm - Add support for the gsm lossy speech compression codec
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gstreamer - Add support for media-libs/gstreamer (Streaming media)
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gtk - Add support for x11-libs/gtk+ (The GIMP Toolkit)
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gtk-doc - Build and install gtk-doc based developer documentation for dev-util/devhelp, IDE and offline use
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gui - Enable support for a graphical user interface
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guile - Add support for the guile Scheme interpreter
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gzip - Compress files with Lempel-Ziv coding (LZ77)
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handbook - Enable handbooks generation for packages by KDE
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hardened - Activate default security enhancements for toolchain (gcc, glibc, binutils)
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hddtemp - Enable monitoring of hdd temperature (app-admin/hddtemp)
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hdf5 - Add support for the Hierarchical Data Format v5
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headers-only - Install only C headers instead of whole package. Mainly used by sys-devel/crossdev for toolchain bootstrap.
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heif - Enable support for ISO/IEC 23008-12:2017 HEIF/HEIC image format
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hscolour - Include coloured haskell sources to generated documentation (dev-haskell/hscolour)
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http2 - Enable support for the HTTP/2 protocol
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ibm - Add support for IBM ppc64 specific systems
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iconv - Enable support for the iconv character set conversion library
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icu - Enable ICU (Internationalization Components for Unicode) support, using dev-libs/icu
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idn - Enable support for Internationalized Domain Names
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ieee1394 - Enable FireWire/iLink IEEE1394 support (dv, camera, ...)
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imagemagick - Enable optional support for the ImageMagick or GraphicsMagick image converter
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imap - Add support for IMAP (Internet Mail Application Protocol)
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imlib - Add support for imlib, an image loading and rendering library
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infiniband - Enable Infiniband RDMA transport support
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inotify - Enable inotify filesystem monitoring support
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introspection - Add support for GObject based introspection
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iodbc - Add support for iODBC library
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ios - Enable support for Apple's iDevice with iOS operating system (iPad, iPhone, iPod, etc)
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ipod - Enable support for iPod device access
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ipv6 - Add support for IP version 6
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jack - Add support for the JACK Audio Connection Kit
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java - Add support for Java
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javascript - Enable javascript support
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jbig - Enable jbig-kit support for tiff, Hylafax, ImageMagick, etc
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jemalloc - Use dev-libs/jemalloc for memory management
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jit - Enable just-in-time compilation for improved performance. May prevent use of some PaX memory protection features in Gentoo Hardened.
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joystick - Add support for joysticks in all packages
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jpeg - Add JPEG image support
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jpeg2k - Support for JPEG 2000, a wavelet-based image compression format
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jpegxl - Add JPEG XL image support
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kde - Add support for software made by KDE, a free software community
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kerberos - Add kerberos support
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keyring - Enable support for freedesktop.org Secret Service API password store
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ladspa - Enable the ability to support ladspa plugins
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lame - Prefer using LAME libraries for MP3 encoding support
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lapack - Add support for the virtual/lapack numerical library
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lash - Add LASH Audio Session Handler support
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latex - Add support for LaTeX (typesetting package)
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lcms - Add lcms support (color management engine)
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ldap - Add LDAP support (Lightweight Directory Access Protocol)
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libass - SRT/SSA/ASS (SubRip / SubStation Alpha) subtitle support
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libcaca - Add support for colored ASCII-art graphics
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libedit - Use the libedit library (replacement for readline)
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libffi - Enable support for Foreign Function Interface library
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libnotify - Enable desktop notification support
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libsamplerate - Build with support for converting sample rates using libsamplerate
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libwww - Add libwww support (General purpose WEB API)
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lirc - Add support for lirc (Linux's Infra-Red Remote Control)
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livecd - !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used during livecd building
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llvm-libunwind - Use sys-libs/llvm-libunwind instead of sys-libs/libunwind
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lm-sensors - Add linux lm-sensors (hardware sensors) support
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lto - Enable Link-Time Optimization (LTO) to optimize the build
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lua - Enable Lua scripting support
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lz4 - Enable support for lz4 compression (as implemented in app-arch/lz4)
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lzip - Enable support for lzip compression
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lzma - Support for LZMA compression algorithm
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lzo - Enable support for lzo compression
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m17n-lib - Enable m17n-lib support
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mad - Add support for mad (high-quality mp3 decoder library and cli frontend)
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magic - Add support for file type detection via magic bytes (usually via libmagic from sys-apps/file)
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maildir - Add support for maildir (~/.maildir) style mail spools
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man - Build and install man pages
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matroska - Add support for the matroska container format (extensions .mkv, .mka and .mks)
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mbox - Add support for mbox (/var/spool/mail) style mail spools
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memcached - Add support for memcached
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mhash - Add support for the mhash library
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mikmod - Add libmikmod support to allow playing of SoundTracker-style music files
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milter - Add sendmail mail filter (milter) support
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minimal - Install a very minimal build (disables, for example, plugins, fonts, most drivers, non-critical features)
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mmap - Add mmap (memory map) support
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mms - Support for Microsoft Media Server (MMS) streams
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mng - Add support for libmng (MNG images)
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modplug - Add libmodplug support for playing SoundTracker-style music files
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modules - Build the kernel modules
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modules-compress - Install compressed kernel modules (if kernel config enables module compression)
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modules-sign - Cryptographically sign installed kernel modules (requires CONFIG_MODULE_SIG=y in the kernel)
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mono - Build Mono bindings to support dotnet type stuff
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motif - Add support for the Motif toolkit
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mp3 - Add support for reading mp3 files
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mp4 - Support for MP4 container format
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mpeg - Add libmpeg3 support to various packages
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mpi - Add MPI (Message Passing Interface) layer to the apps that support it
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mplayer - Enable mplayer support for playback or encoding
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mssql - Add support for Microsoft SQL Server database
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mtp - Enable support for Media Transfer Protocol
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multilib - On 64bit systems, if you want to be able to compile 32bit and 64bit binaries
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musepack - Enable support for the musepack audio codec
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musicbrainz - Lookup audio metadata using MusicBrainz community service (musicbrainz.org)
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mysql - Add mySQL Database support
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mysqli - Add support for the improved mySQL libraries
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nas - Add support for network audio sound
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native-extensions - Build native (e.g. C, Rust) extensions in addition to pure (e.g. Python) code (usually speedups)
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ncurses - Add ncurses support (console display library)
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neXt - Enable neXt toolkit
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netcdf - Enable NetCDF data format support
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networkmanager - Enable net-misc/networkmanager support
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nis - Support for NIS/YP services
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nls - Add Native Language Support (using gettext - GNU locale utilities)
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nntp - Add support for newsgroups (Network News Transfer Protocol)
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nocd - Install all files required to run the application without a CD mounted
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nsplugin - Build plugin for browsers supporting the Netscape plugin architecture (that is almost any modern browser)
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nvenc - Add support for NVIDIA Encoder/Decoder (NVENC/NVDEC) API for hardware accelerated encoding and decoding on NVIDIA cards (requires x11-drivers/nvidia-drivers)
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ocaml - Add support/bindings for the Ocaml language
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ocamlopt - Enable ocamlopt support (ocaml native code compiler) -- Produces faster programs (Warning: you have to disable/enable it at a global scale)
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oci8 - Add Oracle 8 Database Support
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oci8-instant-client - Use dev-db/oracle-instantclient-basic as Oracle provider instead of requiring a full Oracle server install
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odbc - Add ODBC Support (Open DataBase Connectivity)
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offensive - Enable potentially offensive items in packages
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ofx - Enable support for importing (and exporting) OFX (Open Financial eXchange) data files
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ogg - Add support for the Ogg container format (commonly used by Vorbis, Theora and flac)
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openal - Add support for the Open Audio Library
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opencl - Enable OpenCL support (computation on GPU)
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openexr - Support for the OpenEXR graphics file format
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opengl - Add support for OpenGL (3D graphics)
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openmp - Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
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opentype-compat - Convert BDF and PCF bitmap fonts to OTB wrapper format
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opus - Enable Opus audio codec support
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oracle - Enable Oracle Database support
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orc - Use dev-lang/orc for just-in-time optimization of array operations
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osc - Enable support for Open Sound Control
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oss - Add support for OSS (Open Sound System)
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otf - Install OpenType font versions
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pam - Add support for PAM (Pluggable Authentication Modules) - DANGEROUS to arbitrarily flip
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pch - Enable precompiled header support for faster compilation at the expense of disk space and memory
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pcmcia - Add support for PCMCIA slots/devices found on laptop computers
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pcre - Add support for Perl Compatible Regular Expressions
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pda - Add support for portable devices
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pdf - Add general support for PDF (Portable Document Format), this replaces the pdflib and cpdflib flags
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perl - Add optional support/bindings for the Perl language
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php - Include support for the PHP language
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pie - Build programs as Position Independent Executables (a security hardening technique)
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plasma - Build optional KDE plasma addons
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plotutils - Add support for plotutils (library for 2-D vector graphics)
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png - Add support for libpng (PNG images)
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policykit - Enable PolicyKit (polkit) authentication support
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portaudio - Add support for the crossplatform portaudio audio API
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posix - Add support for POSIX-compatible functions
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postgres - Add support for the postgresql database
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postscript - Enable support for the PostScript language (often with ghostscript-gpl or libspectre)
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ppds - Add support for automatically generated ppd (printing driver) files
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prefix - Defines if a Gentoo Prefix offset installation is used
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profile - Add support for software performance analysis (will likely vary from ebuild to ebuild)
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pulseaudio - Add sound server support via media-libs/libpulse (may be PulseAudio or PipeWire)
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python - Add optional support/bindings for the Python language
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qdbm - Add support for the qdbm (Quick Database Manager) library
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qmail-spp - Add support for qmail SMTP plugins
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qt5 - Add support for the Qt 5 application and UI framework
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qt6 - Add support for the Qt 6 application and UI framework
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quicktime - Add support for OpenQuickTime
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radius - Add support for RADIUS authentication
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raw - Add support for raw image formats
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rdp - Enables RDP/Remote Desktop support
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readline - Enable support for libreadline, a GNU line-editing library that almost everyone wants
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recode - Enable support for the GNU recode library
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rss - Enable support for RSS feeds
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ruby - Add support/bindings for the Ruby language
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samba - Add support for SAMBA (Windows File and Printer sharing)
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sasl - Add support for the Simple Authentication and Security Layer
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savedconfig - Use this to restore your config from /etc/portage/savedconfig ${CATEGORY}/${PN}. Make sure your USE flags allow for appropriate dependencies
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scanner - Add support for scanner hardware (e.g. build the sane frontend in kdegraphics)
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screencast - Enable support for remote desktop and screen cast using PipeWire
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sctp - Support for Stream Control Transmission Protocol
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sdl - Add support for Simple Direct Layer (media library)
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seccomp - Enable seccomp (secure computing mode) to perform system call filtering at runtime to increase security of programs
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secureboot - Automatically sign efi executables using user specified key
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selinux - !!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur
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semantic-desktop - Cross-KDE support for semantic search and information retrieval
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session - Add persistent session support
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sid - Enable SID (Commodore 64 audio) file support
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skey - Enable S/Key (Single use password) authentication support
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slang - Add support for the slang text display library (it's like ncurses, but different)
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smartcard - Enable smartcard support
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smp - Enable support for multiprocessors or multicore systems
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snappy - Enable support for Snappy compression (as implemented in app-arch/snappy)
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sndfile - Add support for libsndfile
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snmp - Add support for the Simple Network Management Protocol if available
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soap - Add support for SOAP (Simple Object Access Protocol)
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sockets - Add support for tcp/ip sockets
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socks5 - Add support for the socks5 proxy
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sound - Enable sound support
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source - Zip the sources and install them
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sox - Add support for Sound eXchange (SoX)
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speech - Enable text-to-speech support
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speex - Add support for the speex audio codec (used for speech)
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spell - Add dictionary support
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split-usr - Enable behavior to support maintaining /bin, /lib*, /sbin and /usr/sbin separately from /usr/bin and /usr/lib*
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sqlite - Add support for sqlite - embedded sql database
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ssl - Add support for SSL/TLS connections (Secure Socket Layer / Transport Layer Security)
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startup-notification - Enable application startup event feedback mechanism
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static - !!do not set this during bootstrap!! Causes binaries to be statically linked instead of dynamically
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static-libs - Build static versions of dynamic libraries as well
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strip - Allow symbol stripping to be performed by the ebuild for special files
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subversion - Enable subversion (version control system) support
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suid - Enable setuid root program(s)
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svg - Add support for SVG (Scalable Vector Graphics)
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svga - Add support for SVGAlib (graphics library)
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symlink - Force kernel ebuilds to automatically update the /usr/src/linux symlink
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syslog - Enable support for syslog
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systemd - Enable use of systemd-specific libraries and features like socket activation or session tracking
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szip - Use the szip compression library
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taglib - Enable tagging support with taglib
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tcl - Add support the Tcl language
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tcmalloc - Use the dev-util/google-perftools libraries to replace the malloc() implementation with a possibly faster one
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tcpd - Add support for TCP wrappers
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telemetry - Send anonymized usage information to upstream so they can better understand our users
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test - Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)
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test-rust - Enable important test dependencies that require Rust toolchain
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theora - Add support for the Theora Video Compression Codec
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threads - Add threads support for various packages. Usually pthreads
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tidy - Add support for HTML Tidy
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tiff - Add support for the TIFF image format
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timidity - Build with Timidity++ (MIDI sequencer) support
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tk - Add support for Tk GUI toolkit
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truetype - Add support for FreeType and/or FreeType2 fonts
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ttf - Install TrueType font versions
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udev - Enable virtual/udev integration (device discovery, power and storage device support, etc)
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udisks - Enable storage management support (automounting, volume monitoring, etc)
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uefi - Enable support for the Unified Extensible Firmware Interface
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unicode - Add support for Unicode
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unwind - Add support for call stack unwinding and function name resolution
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upnp - Enable UPnP port mapping support
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upnp-av - Enable UPnP audio/video streaming support
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upower - Enable power management support
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usb - Add USB support to applications that have optional USB support (e.g. cups)
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v4l - Enable support for video4linux (using linux-headers or userspace libv4l libraries)
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vaapi - Enable Video Acceleration API for hardware decoding
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vala - Enable bindings for dev-lang/vala
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valgrind - Enable annotations for accuracy. May slow down runtime slightly. Safe to use even if not currently using dev-debug/valgrind
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vanilla - Do not add extra patches which change default behaviour; DO NOT USE THIS ON A GLOBAL SCALE as the severity of the meaning changes drastically
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vcd - Video CD support
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vdpau - Enable the Video Decode and Presentation API for Unix acceleration interface
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verify-sig - Verify upstream signatures on distfiles
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vhosts - Add support for installing web-based applications into a virtual-hosting environment
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videos - Install optional video files (used in some games)
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vim-syntax - Pulls in related vim syntax scripts
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vnc - Enable VNC (remote desktop viewer) support
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vorbis - Add support for the OggVorbis audio codec
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vulkan - Add support for 3D graphics and computing via the Vulkan cross-platform API
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wavpack - Add support for wavpack audio compression tools
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wayland - Enable dev-libs/wayland backend
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webkit - Add support for the WebKit HTML rendering/layout engine
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webp - Add support for the WebP image format
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wifi - Enable wireless network functions
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wmf - Add support for the Windows Metafile vector image format
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wxwidgets - Add support for wxWidgets/wxGTK GUI toolkit
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x264 - Enable h264 encoding using x264
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xattr - Add support for extended attributes (filesystem-stored metadata)
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xcb - Support the X C-language Binding, a replacement for Xlib
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xcomposite - Enable support for the Xorg composite extension
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xemacs - Add support for XEmacs
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xface - Add xface support used to allow a small image of xface format to be included in an email via the header 'X-Face'
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xft - Build with support for XFT font renderer (x11-libs/libXft)
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xine - Add support for the XINE movie libraries
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xinerama - Add support for querying multi-monitor screen geometry through the Xinerama API
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xinetd - Add support for the xinetd super-server
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xml - Add support for XML files
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xmlrpc - Support for xml-rpc library
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xmp - Enable support for Extensible Metadata Platform (Adobe XMP)
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xmpp - Enable support for Extensible Messaging and Presence Protocol (XMPP) formerly known as Jabber
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xosd - Sends display using the X On Screen Display library
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xpm - Add support for XPM graphics format
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xscreensaver - Add support for XScreenSaver extension
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xv - Add in optional support for the Xvideo extension (an X API for video playback)
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xvid - Add support for xvid.org's open-source mpeg-4 codec
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zeroconf - Support for DNS Service Discovery (DNS-SD)
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zip - Enable support for ZIP archives
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zlib - Add support for zlib compression
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zsh-completion - Enable zsh completion support
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zstd - Enable support for ZSTD compression
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