gentoo-overlay/dev-util/edi/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="person">
    <email>juippis@gentoo.org</email>
    <name>Joonas Niilola</name>
  </maintainer>
  <use>
    <flag name="clang">
      Provide integration with <pkg>sys-devel/clang</pkg> for autocompletion and inline 
      errors
    </flag>
  </use>
</pkgmetadata>