Bug#1119790: libadwaita-1: Please force softpipe on powerpc and sparc64

[John Paul Adrian Glaubitz]

Hello Simon,

On Fri, 2025-10-31 at 21:31 +0000, Simon McVittie wrote:

> At the moment, powerpc and sparc64 are listed in LLVM_ARCHS in mesa's 
> debian/rules, indicating that they are believed to have working 
> LLVM-related features. If that's no longer true then mesa seems like the 
> place to address it.

They are supported by LLVM but they don't have full JIT support at the
moment as described in [1].

> It's unfortunate that Mesa doesn't currently have build-time tests that 
> detect whether its software renderer works on a particular architecture, 
> resulting in a non-functional llvmpipe being detected further down the 
> dependency stack when packages like GTK and libadwaita run their test 
> suites. Adding a smoke-test to mesa, so that it fails to build if 
> llvmpipe is enabled-but-broken, would probably also be useful.

Yeah, I agree.

Adrian

> [1] https://github.com/sparclinux/issues/issues/20

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