Build prints several errors and then succeeds

[yurivict]

See the log:

compile options: '-I/usr/local/include/python3.8 -c'
extra options: '-mavx5124fmaps -mavx5124vnniw -mavx512vpopcntdq'
CCompilerOpt.dist_test[576] : CCompilerOpt._dist_test_spawn[711] : Command (cc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer -fPIC -I/usr/local/include/python3.8 -c /usr/local/lib/python3.8/site-packages/numpy/distutils/checks/test_flags.c -o /tmp/tmpz0o1tipj/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/test_flags.o -MMD -MF /tmp/tmpz0o1tipj/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/test_flags.o.d -mavx5124fmaps -mavx5124vnniw -mavx512vpopcntdq) failed with exit status 1 output ->
cc: error: unknown argument: '-mavx5124fmaps'
cc: error: unknown argument: '-mavx5124vnniw'

CCompilerOpt.cc_test_flags[1003] : testing failed
CCompilerOpt.feature_test[1444] : testing feature 'AVX512_KNM' with flags (-msse -msse2 -msse3 -mssse3 -msse4.1 -mpopcnt -msse4.2 -mavx -mf16c -mfma -mavx2 -mavx512f -mavx512cd -mavx512er -mavx512pf)
C compiler: cc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer -fPIC

compile options: '-I/usr/local/include/python3.8 -c'
extra options: '-msse -msse2 -msse3 -mssse3 -msse4.1 -mpopcnt -msse4.2 -mavx -mf16c -mfma -mavx2 -mavx512f -mavx512cd -mavx512er -mavx512pf -Werror'
CCompilerOpt.dist_test[576] : CCompilerOpt._dist_test_spawn[711] : Command (cc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -O2 -pipe -fno-omit-frame-pointer -fstack-protector-strong -fno-strict-aliasing -fno-omit-frame-pointer -fPIC -I/usr/local/include/python3.8 -c /usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.c -o /tmp/tmpz0o1tipj/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.o -MMD -MF /tmp/tmpz0o1tipj/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.o.d -msse -msse2 -msse3 -mssse3 -msse4.1 -mpopcnt -msse4.2 -mavx -mf16c -mfma -mavx2 -mavx512f -mavx512cd -mavx512er -mavx512pf -Werror) failed with exit status 1 output ->
/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.c:9:9: error: implicit declaration of function '_mm512_4fmadd_ps' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    b = _mm512_4fmadd_ps(b, b, b, b, b, NULL);
        ^
/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.c:9:9: note: did you mean '_mm512_fmadd_ps'?
/usr/lib/clang/12.0.1/include/avx512fintrin.h:2716:1: note: '_mm512_fmadd_ps' declared here
_mm512_fmadd_ps(__m512 __A, __m512 __B, __m512 __C)
^
/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.c:9:7: error: assigning to '__m512' (vector of 16 'float' values) from incompatible type 'int'
    b = _mm512_4fmadd_ps(b, b, b, b, b, NULL);
      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/lib/python3.8/site-packages/numpy/distutils/checks/cpu_avx512_knm.c:11:9: error: implicit declaration of function '_mm512_4dpwssd_epi32' is invalid in C99 [-Werror,-Wimplicit-func

There are obviously bugs in makefiles that build errors aren't caught.

OS: FreeBSD 13