Bug#1126688: openblas causes slepc4py test failure on ppc64el: Error in LAPACK subroutine gesvd: info=127

[Sébastien Villemot]

Le lundi 23 février 2026 à 12:36 +0100, Drew Parsons a écrit :
> Source: openblas
> Followup-For: Bug #1126688
> X-Debbugs-Cc: debian-powerpc at lists.debian.org
> User: debian-powerpc at lists.debian.org
> Usertags: ppc64el
> Control: tags 1126688 upstream patch
> 
> Upstream has been able to reproduce the error and identified that it
> occurs when -O3 optimisation is used.
> 
> They've prepared a workaround patch enforcing -O2 in the problematic
> section of code,
> 
> https://github.com/OpenMathLib/OpenBLAS/pull/5656

Thanks for the heads up.

Actually I consider this as a bug in the Debian packaging, because
optimization flags are supposed to be taken from dpkg-buildflags. This
is actually the case for most architectures, but on ppc64el the -O3
flag is indeed taken from upstream build system, and this should
ideally be changed.

-- 
⢀⣴⠾⠻⢶⣦⠀  Sébastien Villemot
⣾⠁⢠⠒⠀⣿⡁  Debian Developer
⢿⡄⠘⠷⠚⠋⠀  https://sebastien.villemot.name
⠈⠳⣄⠀⠀⠀⠀  https://www.debian.org

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