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. -- Best regards, Michał Górny <http://dev.gentoo.org/~mgorny/>
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