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openblas: prevent microarch flags for generic targets (#22270)

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As of OpenBLAS 0.3.13, leaving off `TARGET` by default optimizes most
code for the host system -- adding flags that cause the resulting
library to fail (SIGILL) on older systems.  This change should ensure
that a "x86_64" target for example will work across deployment systems.

https://github.com/xianyi/OpenBLAS/issues/3139
This commit is contained in:
Seth R. Johnson 2021-03-13 06:00:15 -05:00 committed by GitHub
parent 746081e933
commit 5b2a54952c
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1 changed files with 4 additions and 2 deletions
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6
var/spack/repos/builtin/packages/openblas/package.py
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@ -218,8 +218,10 @@ def _microarch_target_args(self):
if microarch.vendor == 'generic':
# User requested a generic platform, or we couldn't find a good
# match for the requested one. Allow OpenBLAS to determine
# an optimized kernel at run time.
args.append('DYNAMIC_ARCH=1')
# an optimized kernel at run time, including older CPUs, while
# forcing it not to add flags for the current host compiler.
args.extend(['DYNAMIC_ARCH=1', 'DYNAMIC_OLDER=1',
'TARGET=GENERIC'])
elif microarch.name in skylake:
# Special case for renaming skylake family
args.append('TARGET=SKYLAKEX')