gentoo-overlay/sci-libs/arprec/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>sci@gentoo.org</email>
    <name>Gentoo Science Project</name>
  </maintainer>
  <use>
    <flag name="qd">Use <pkg>sci-libs/qd</pkg> for quad-double datatype</flag>
  </use>
</pkgmetadata>