gentoo-overlay/x11-libs/libnotify/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>freedesktop</herd>
  <use>
    <flag name='introspection'>Use <pkg>dev-libs/gobject-introspection</pkg> for introspection</flag>
    <flag name='symlink'>Create symlink from libnotify-notify-send to notify-send</flag>
  </use>
</pkgmetadata>