gentoo-overlay/media-sound/jack-audio-connection-kit/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>proaudio</herd>
  <use>
    <flag name="coreaudio">Build the CoreAudio driver on Mac OS X systems</flag>
    <flag name="cpudetection">Enables runtime cpudetection</flag>
	<flag name="pam">Add basic realime configuration via <pkg>sys-auth/realtime-base</pkg></flag>
  </use>
</pkgmetadata>