gelcounter/counter.c/Recipe

<recipe>
  <script src="C">
    define("OUTPUT", "../counter");
    define("CC", "clang");
  </script>

  <rule name="debug">
    flags("-ggdb");
  </rule>

  <rule name="release">
    flags("-Ofast");
  </rule>

  <rule name="rebuild" requires="clear" then="build"/>

  <rule name="build" then="link">
    sources(glob("*.c"));
    flags("-w");
    pkg_config("libpng");
  </rule>

  <rule name="clear">
    `rm -rf *.o $_OUT`;
  </rule>

  <rule name="entry" requires="release,build"/>
</recipe>