gentoo-overlay/media-gfx/photoqt/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>qt</herd>
  <use>
    <flag name='exiv2'>
      Use <pkg>media-gfx/exiv2</pkg> as optional dependency
    </flag>
    <flag name='graphicsmagick'>
      Use <pkg>media-gfx/graphicsmagick</pkg> as optional dependency
    </flag>
  </use>
</pkgmetadata>