Re: Bug#1116453: mpi4py: FTBFS on sh4: too large for field of 2 bytes

On Sat, 2025-09-27 at 15:30 +0200, John Paul Adrian Glaubitz wrote:
> > Likely due to changes in gcc-15, aided and abetted by cython 3.0.
> > Upstream suggests building with -DCYTHON_LIMITED_API=1
> > see https://github.com/mpi4py/mpi4py/pull/690#issuecomment-3337456651
> 
> Thanks a lot for investigating this issue and reporting it, I will have a look.
> 
> However, since sh4 is not a release architecture, the severity should be lowered.

Addendum:

Since we switched GCC to the LRA backend for version 15 on sh4, this particular
bug could actually be a regression due to the switch and we should report this
upstream.

A test case will be to verify whether this issue still shows with "-mno-lra".

Adrian

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