BLD: Add NPY_DISABLE_SVML env var to opt out of SVML#20842
Merged
charris merged 1 commit intonumpy:maintenance/1.22.xfrom Jan 17, 2022
Merged
BLD: Add NPY_DISABLE_SVML env var to opt out of SVML#20842charris merged 1 commit intonumpy:maintenance/1.22.xfrom
charris merged 1 commit intonumpy:maintenance/1.22.xfrom
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Backport of #20695.
SVML uses AVX-512 extensions that are only supported on sufficiently new Intel CPUs. Hard-requiring this vendored library for all x86_64 Linux platforms is not appropriate. When I build on an AMD Zen 2 CPU, I get errors to the effect of
when trying to import numpy. Furthermore, the simple platform check thwarts cross-compilation because it is the host, rather than the target, that is checked.
This patch adds recogniton for
NPY_DISABLE_SVML=1in the environment, which will Numpy to build without the vendored SVML library. It might also be desirable to make the default-on behavior a little more nuanced than simply looking for Linux x86_64. However, I dont' have any specific ideas about the circumstances under which it should be enabled by default.