BUG: Fix a MacOS build failure #18016
Merged
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Backport of #17906.
numpy
fails to build on macOS Big Sur, on a Python 3.9.0 that was configured withMACOSX_DEPLOYMENT_TARGET=11
:On such a system,
sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
will return11
as anint
, not as astr
. And setting an environment variable to anint
is not allowed, and fails as seen above.