gentoo-overlay/media-libs/spandsp/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>voip</herd>
  <use>
	<flag name='fixed-point'>Enable fixed point support</flag>
    <flag name='sse3'>Enable SSE3 support</flag>
    <flag name='sse4'>Enable SSE4 support</flag>
    <flag name='sse4a'>Enable SSE4a support</flag>
    <flag name='sse5'>Enable SSE5 support</flag>
  </use>
</pkgmetadata>