gentoo-overlay/app-admin/sagan/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="smtp">Build witch SMTP (E-Mail) support</flag>
		<flag name="lognorm">Add support for log/rules normalizations via <pkg>dev-libs/liblognorm</pkg></flag>
		<flag name="pcap">Add support for network packet capture via <pkg>net-libs/libpcap</pkg></flag>
		<flag name="libdnet">Add support for <pkg>dev-libs/libdnet</pkg></flag>
		<flag name="snort">Add support to interact with Snort IDE using  <pkg>net-analyzer/snortsam</pkg>'</flag>
	</use>
</pkgmetadata>