gentoo-overlay/dev-db/soci/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<!--maintainer-needed-->
	<use>
		<flag name="boost">Enable boost support</flag>
		<flag name="empty">Build the sample backend called Empty</flag>
	</use>
	<upstream>
		<remote-id type="sourceforge">soci</remote-id>
	</upstream>
</pkgmetadata>