gentoo-overlay/kde-apps/kdeartwork-kscreensaver/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>kde</herd>
	<use>
		<flag name="eigen">Enable various arithmetic screensavers which use Eigen2 for computations.</flag>
		<flag name="kexiv2">Enable image rotation based on exif tags with libkexiv2.</flag>
	</use>
</pkgmetadata>