gentoo-overlay/sys-fs/loop-aes/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<herd>crypto</herd>
	<use>
		<flag name='aes-ni'>Enable support for Intel's AES instruction
			set</flag>
		<flag name='extra-ciphers'>Enable extra ciphers</flag>
		<flag name='keyscrub'>Protects the encryption key in memory but takes
			more cpu resources</flag>
		<flag name='padlock'>Use VIA padlock instructions, detected at run time,
			code still works on non-padlock processors</flag>
	</use>
</pkgmetadata>