gentoo-overlay/media-libs/sdl2-mixer/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>games</herd>
	<use>
		<flag name='fluidsynth'>Use <pkg>media-sound/fluidsynth</pkg>
			for MIDI support</flag>
		<flag name='midi'>basic support for MIDI files</flag>
		<flag name='mod'>basic support for MOD files</flag>
		<flag name='playtools'>Install playwave and playmus tools (useful
			for testing)</flag>
		<flag name='smpeg'>Use <pkg>media-libs/smpeg</pkg> for MP3 support
		</flag>
		<flag name='tremor'>enable OGG Vorbis music via libtremor</flag>
		<flag name='wav'>support WAVE files</flag>
	</use>
</pkgmetadata>