Re: [PATCH v2 0/2] sparc/build: Rework CFLAGS for clang compatibility

[Nathan Chancellor <nathan@kernel.org>]

On Sat, Oct 26, 2024 at 02:52:52PM +0000, Koakuma wrote:
> Masahiro Yamada <masahiroy@kernel.org> wrote:
> > I think this should be documented (required LLVM version and
> > the supported build command),
> > otherwise people cannot test this patch.
> 
> Nathan Chancellor <nathan@kernel.org> wrote:
> > I am not sure that there is a super concise way to describe for
> > Documentation/kbuild/llvm.rst that sparc currently requires 'CC=clang
> > LLVM_IAS=0' along with a build of clang from the main branch of
> > llvm-project to work properly.
> 
> So about this, as a middle ground, would it be okay if I put
> 
> ``CC=clang LLVM_IAS=0`` (LLVM >= 20)
> 
> In the documentation, in a similar manner to the s390x entry?
> I know that LLVM 20 is still a couple months away but those commits will
> likely be released with that version, and since it also tells people
> to not use a version that is too old, I think it should be okay (?)

Yes, I think that would be reasonable.

Cheers,
Nathan