gentoo-overlay/app-emulation/vice/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='ethernet'>Enable ethernet emulation</flag>
	<flag name="fullscreen">Enable the ability to run fullscreen</flag>
	<flag name="gtk2">Use GTK+2 for GUI instead of GTK+3</flag>
	<flag name="gtk3">Use GTK+3for GUI  instead of GTK+2</flag>
	<flag name='memmap'>Enable extra monitor features</flag>
	<flag name='sdlsound'>Use <pkg>media-libs/libsdl</pkg> for sound support</flag>
	<flag name='vte'>Enable support for <pkg>x11-libs/vte</pkg> in the GTK+ interface</flag>
	<flag name='xrandr'>Enable support for the X xrandr extension</flag>
</use>
</pkgmetadata>