Re: Bug#1081943: libgl1-mesa-dri: llvmpipe exists but does not work on sparc64

Hello Simon,

On Mon, 2024-09-16 at 11:43 +0100, Simon McVittie wrote:
> To reproduce:
> - install gtk4 build-dependencies on sparc64 porterbox with no access to a
>   real GPU
> - get gtk4 source
> - edit debian/rules to remove the special case that forces use of softpipe
>   on sparc64
> - build and run tests
> 
> Expected result: either of these:
> - llvmpipe exists, is used, and works
> - llvmpipe doesn't exist and softpipe is automatically used instead
> 
> Actual result:
> - all tests that use OpenGL fail with message "Target has no JIT support"
> 
> I would suggest special-casing llvmpipe (and anything else requiring LLVM
> JIT: lavapipe?) to be built on most of the $(LLVM_ARCHS), but not sparc64.

I just ran into this issue while looking at libadwaita-1.

I'm not 100% sure yet what would need to be done to enable full JIT support on
sparc64. I assume that the missing component is liborc, isn't it?

Looking at the LLVM upstream sources, I see no obvious reason why liborc should
not be supported on sparc64. But I'm not an expert on liborc, so I might be missing
something.

Adrian

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