gentoo-overlay/media-libs/gstreamer/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">Disable some PaX memory protections to allow plugins
			that use <pkg>dev-lang/orc</pkg> for runtime optimization to be
			used on hardened PaX systems</flag>
	</use>
</pkgmetadata>