version=4
opts="uversionmangle=s/-RC(\d*)/~rc$1/, filenamemangle=s/-RC(\d*)/~rc$1/;s%(?:^.*?/)?v?(\d[\d.\~rc]*)\.tar\.gz%@PACKAGE@-$1.tar.gz%" \
   https://github.com/pocl/pocl/tags \
   (?:.*?/)?v?(\d[\d.RC-]*)\.tar\.gz
