It does. In effect it determines which xorg-drivers are to be merged. This, and some other packages with options for specific graphic cards/adapters.
Best regards, Andy Mender. On 27 Sep 2016 22:52, "Raymond Jennings" <shent...@gmail.com> wrote: > On Sun, Sep 25, 2016 at 11:29 PM, Michał Górny <mgo...@gentoo.org> wrote: > >> On Mon, 26 Sep 2016 08:18:27 +0200 >> Michał Górny <mgo...@gentoo.org> wrote: >> >> > On Mon, 26 Sep 2016 00:42:11 +0300 >> > Mart Raudsepp <l...@gentoo.org> wrote: >> > >> > > Ühel kenal päeval, P, 25.09.2016 kell 23:08, kirjutas Michał Górny: >> > > > I'd like to introduce a new USE_EXPAND for LLVM & clang. It'd be >> > > > named >> > > > LLVM_TARGETS, and it's going to replace the current solution based >> on >> > > > USE=multitarget & VIDEO_CARDS=radeon. >> > > > >> > > > - VIDEO_CARDS=radeon enabled additional R600 target, >> > > >> > > No. It enables AMDGPU target these days, which is for the modern stuff >> > > and very much needed by them. >> > > r600 stuff was in the llvm 3.3-3.6 era, which was used by old >> > > experimental mesa[r600-llvm-compiler] as an alternative shader >> compiler >> > > for r600 instead of builtin mesa stuff. This work has been ditched >> long >> > > ago afaik. >> > > Instead now VIDEO_CARDS=radeon is required on llvm for radeonsi and >> > > later AMD GPUs for _ANY_ shader compiler support at all, plus other >> > > things (from it adding AMDGPU to llvm targets in current ebuild). >> > >> > Yes, yes, I am old :-P. You are right, it's AMDGPU these days. >> > >> > > > The new system will be applied to 3.9.0 and 9999 ebuilds. >> VIDEO_CARDS >> > > > flag will be removed completely because of no revdeps. >> > > >> > > People with radeonsi graphics set VIDEO_CARDS=radeon already, I'm a >> bit >> > > reserved about having to force them to set some LLVM_TARGETS=radeon or >> > > LLVM_TARGETS=amdgpu on top of that to satisfy some USE depends on >> > > mesa[video_cards_radeon]. >> > >> > How about nvidia users who seem to require NVPTX for libclc these days? >> > Do they set VIDEO_CARDS='nvidia nv nouveau ...'? The problem is that >> > this abuse of VIDEO_CARDS is never going to be 100% clear to users. >> > >> > I guess we can enable GPU targets in desktop profiles by default to >> > save most of our users from the issues. >> >> Hmm, I actually see we're enabling them in arch profiles. So I guess >> matching enable there would fit there as well. >> >> -- >> Best regards, >> Michał Górny >> <http://dev.gentoo.org/~mgorny/> >> > > This might be a stupid question, but I have a hunch I'm not the only user > curious about this. > > Doesn't VIDEO_CARDS factor in on xorg-server's video driver selection? >
