gentoo-overlay/net-libs/aqbanking/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer>
    <email>hanno@gentoo.org</email></maintainer>
  <use>
    <flag name='chipcard'>Enable support for DDV/RSA-chipcards</flag>
  </use>
</pkgmetadata>