gentoo-overlay/dev-lang/rakudo/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="person">
    <email>patrick@gentoo.org</email>
    <name>Patrick Lauer</name>
  </maintainer>
  <use>
    <flag name="clang">Use Clang to compile the MoarVM backend</flag>
    <flag name="moar">Use the MoarVM as backend</flag>
  </use>
</pkgmetadata>