cairo and openexr, good idea, AFAIK. udev has come up before but from that discussion, the flag means slightly different things in some cases. Keeping it local allows individual per-pkg descriptions, so where it means something different, the description can say so. In both meanings, udev defaulting to on remained best, but with the slightly different meanings... There was some discussion about modifying things or changing the flag where it meant something else, but I don't know what came of that.
maybe it would be a lot of work. to even develop the tools. but it would be nice if a global use flag could have a detailed option. example. euse -i mplayer [+ C ] mplayer - Enable mplayer support for playback or encoding is what we currently get. add a -d option for --descriptive euse -id mplayer could show something like [+ C ] mplayer - Enable mplayer support for playback or encoding media-video/kmplayer - adds the ability to play back media using the mplayer engine or maybe something better... -- gentoo-dev@gentoo.org mailing list