[MacPorts] #62256: py-numpy: @1.20.1: build error for macOS 10.12

[MacPorts]

#62256: py-numpy: @1.20.1: build error for macOS 10.12
---------------------+-----------------------
 Reporter:  mascguy  |      Owner:  michaelld
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  py-numpy
---------------------+-----------------------
 `py-numpy` subports (including those for both Python 3.7 and 3.8), are
 failing on macOS 10.12.

 Given that this appears to be occurring while checking for compiler
 features - what would normally be the configure phase - this ideally
 shouldn't cause the build to fail. Nonetheless, it does.

 The apparent errors seen in the logs, are as follows. Whether this is the
 true underlying issue, though, isn't clear:

 {{{
 .../py37-numpy/work/numpy-numpy-
 8d9d768/numpy/distutils/checks/cpu_avx512_clx.c:6:17: error: implicit
 declaration of function '_mm512_dpbusd_epi32' is invalid in C99 [-Werror
 ,-Wimplicit-function-declaration]
     __m512i a = _mm512_dpbusd_epi32(_mm512_setzero_si512(),
 _mm512_setzero_si512(), _mm512_setzero_si512());
                 ^
 .../py37-numpy/work/numpy-numpy-
 8d9d768/numpy/distutils/checks/cpu_avx512_clx.c:6:17: note: did you mean
 '_mm512_abs_epi32'?
 /Library/Developer/CommandLineTools/usr/lib/clang/9.0.0/include/avx512fintrin.h:1881:1:
 note: '_mm512_abs_epi32' declared here
 _mm512_abs_epi32(__m512i __A)
 ^
 .../py37-numpy/work/numpy-numpy-
 8d9d768/numpy/distutils/checks/cpu_avx512_clx.c:6:13: error: initializing
 '__m512i' (vector of 8 'long long' values) with an expression of
 incompatible type 'int'
     __m512i a = _mm512_dpbusd_epi32(_mm512_setzero_si512(),
 _mm512_setzero_si512(), _mm512_setzero_si512());
             ^
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2 errors generated.
 CCompilerOpt.feature_test[1458] : testing failed
 }}}

 This is seen both in local testing, as well as on the macOS 10.12 builder:

 [https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/138564/steps
 /install-port/logs/stdio]

 That same log is also attached, to ensure it's not lost when build history
 is aged out.

-- 
Ticket URL: <https://trac.macports.org/ticket/62256>
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