gentoo-overlay/media-plugins/gst-plugins-a52dec/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>gstreamer</herd>
<use>
	<flag name="orc">Use <pkg>dev-lang/orc</pkg> for runtime detection of CPU
		MMX/MMXEXT/3dNow! capabilities to pass down to a52dec library.</flag>
</use>
</pkgmetadata>