gentoo-overlay/media-video/guvcview/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>media-video@gentoo.org</email>
	</maintainer>
	<upstream>
		<remote-id type="sourceforge">guvcview</remote-id>
	</upstream>
	<use>
		<flag name="qt5">Build with Qt5 interface instead Gtk+</flag>
	</use>
</pkgmetadata>