foldingathome can use CUDA, but requires at least two manual steps: - add the foldingathome user to the 'video' group - build nvidia-drivers with the 'uvm' USE flag Having the ebuild do these if the 'cuda' USE flag is enabled seems like the best solution to me. Reproducible: Always
It is a nice idea, however this goes against use flag policy -- since this is a runtime-only config change and foldingathome itself doesn't change on disk, the use of a USE flag to control what is only a runtime dependency is not something acceptable in a gentoo-repo ebuild. I am however not up to date on the proper method for managing optional runtime-only dependencies and so I will look up what the best method to notify users of this extra requirement would be. As I recall, as of the latest version, foldingathome is already added to the video group by default though so that part should be addressed.
(In reply to Ian Stakenvicius from comment #1) > > I am however not up to date on the proper method for managing optional > runtime-only dependencies and so I will look up what the best method to > notify users of this extra requirement would be. > We use 'optfeature' from eutils.eclass before IUSE_RUNTIME is implemented. optfeature can be used to include a USE flag optfeature "Nvidia's CUDA unit" x11-drivers/nvidia-drivers[uvm] and it only prints this line if user doesn't have it installed.
Ah ok, I see that mentioned at <https://devmanual.gentoo.org/general-concepts/use-flags/index.html>. I can find a few ebuilds which seem to use USE flags this way though: 'cuda' in sci-misc/boinc, 'opencl' in app-emulation/crossover-bin, 'ffmpeg' or 'pulseaudio' in www-client/firefox-bin. If not though, a notification would probably be fine.
