tiff's ebuild: $(use_enable bigtiff largefile) metadata.xml: <flag name="bigtiff">Provide support for very large tiff files.</flag> can we please get rid of this violation? why not "use mojo && append-lfs-flags" ? :-p
at the very least it should be changed to the more common USE=largefile
the autotools based configure scripts are usually smart about this, and enable it automatically on arch's where it's required, so USE flag is unnecessary if that's not true for tiff, then what Mike said
upstream enables largefile support by default -> the "pointless" use flag dropped in _beta6