gentoo-overlay/media-libs/gupnp-dlna/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>net-p2p</herd>
	<herd>gnome</herd>
	<use>
		<flag name="introspection">Use
			<pkg>dev-libs/gobject-introspection</pkg> for introspection</flag>
	</use>
</pkgmetadata>