gentoo-overlay/app-admin/sagan/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer>
  <email>andreis.vinogradovs@gmail.com</email>
</maintainer>
<maintainer>
  <email>maksbotan@gentoo.org</email>
</maintainer>
<use>
  <flag name='smtp'>Build witch SMTP (E-Mail) support</flag>
  <flag name='lognorm'>Add support for log/rules normalizations via <pkg>dev-libs/liblognorm</pkg></flag>
  <flag name='pcap'>Add support for network packet capture via <pkg>net-libs/libpcap</pkg></flag>
  <flag name='libdnet'>Add support for <pkg>dev-libs/libdnet</pkg></flag>
</use>
</pkgmetadata>