BLD: use BUFFERSIZE=20 in OpenBLAS#17924
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charris merged 1 commit intonumpy:maintenance/1.19.xfrom Dec 5, 2020
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08 - Backport
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Backport of #17759.
xref OpenMathLib/OpenBLAS#2970 where it was suggested to compile OpenBLAS with BUFFERSIZE=20 to revert the memory footprint to what it was in OpenBLAS 0.3.9 (we now use 0.3.12). This was done in MacPython/openblas-libs#46, and this PR uses it in NumPy.
xref issue gh-17674, gh-17684 which triggered the discussion.