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/>
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