Bug#1019478: libflame: failing numpy tests (avx512) in testing transition tests

[Drew Parsons]

Source: libflame
Version: 5.2.0-3
Severity: normal

libflame 5.2.0-3 in testing is failing numpy tests on amd64 against
scipy 1.8.1-14 fom unstable, affecting the scipy 1.8 upgrade.

The pattern of the failure is strange.  Tests passed with scipy
1.8.1-13 only days before.  Tests in unstable are passing. The failure
is in libflame's numpy test not it's scipy test. But numpy hasn't been
updated. Why has it just now started failing? Maybe it's related to
gcc-12 (which also triggers test failure)?

The error seems to come from numpy's use of avx512 in
TestSharedMemory.test_hidden[CLONGDOUBLE]:

E                                  compile options: '-I/usr/include/python3.10 -c'
E                                  extra options: '-mavx512er -mavx512pf'
E                                  CCompilerOpt.feature_test[1466] : testing feature 'AVX512_KNL' with flags (-msse -msse2 -msse3 -mssse3 -msse4.1 -mpopcnt -msse4.2 -mavx -mf16c -mfma -mavx2 -mavx512f -mavx512cd -mavx512er -mavx512pf)
E                                  C compiler: x86_64-linux-gnu-gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC
E                                  
E                                  compile options: '-I/usr/include/python3.10 -c'
E                                  extra options: '-msse -msse2 -msse3 -mssse3 -msse4.1 -mpopcnt -msse4.2 -mavx -mf16c -mfma -mavx2 -mavx512f -mavx512cd -mavx512er -mavx512pf -Werror'
E                                  CCompilerOpt.dist_test[581] : CCompilerOpt._dist_test_spawn[716] : Command (x86_64-linux-gnu-gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.10 -c /usr/lib/python3/dist-packages/numpy/distutils/checks/cpu_avx512_knl.c -o /tmp/tmpukjc8skw/usr/lib/python3/dist-packages/numpy/distutils/checks/cpu_avx512_knl.o -MMD -MF /tmp/tmpukjc8skw/usr/lib/python3/dist-packages/numpy/distutils/checks/cpu_avx512_knl.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 -> 
E                                  In file included from /usr/lib/gcc/x86_64-linux-gnu/12/include/immintrin.h:51,
E                                                   from /usr/lib/python3/dist-packages/numpy/distutils/checks/cpu_avx512_knl.c:14:
E                                  In function �_mm512_exp2a23_round_pd�,
E                                      inlined from �main� at /usr/lib/python3/dist-packages/numpy/distutils/checks/cpu_avx512_knl.c:21:17:
E                                  /usr/lib/gcc/x86_64-linux-gnu/12/include/avx512erintrin.h:55:20: error: �__W� is used uninitialized [-Werror=uninitialized]
E                                     55 |   return (__m512d) __builtin_ia32_exp2pd_mask ((__v8df) __A,
E                                        |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
E                                     56 |                                                (__v8df) __W,
E                                        |                                                ~~~~~~~~~~~~~
E                                     57 |                                                (__mmask8) -1, __R);
E                                        |                                                ~~~~~~~~~~~~~~~~~~~
E                                  /usr/lib/gcc/x86_64-linux-gnu/12/include/avx512erintrin.h: In function �main�:
E                                  /usr/lib/gcc/x86_64-linux-gnu/12/include/avx512erintrin.h:54:11: note: �__W� was declared here
E                                     54 |   __m512d __W;
E                                        |           ^~~



Also there is the error:

E                                  compile options: '-I/usr/lib/python3/dist-packages/numpy/core/include -Ibuild/src.linux-x86_64-3.10/numpy/distutils/include -I/usr/include/python3.10 -c'
E                                  extra options: '-msse -msse2 -msse3'
E                                  x86_64-linux-gnu-gcc: wrapmodule.c
E                                  x86_64-linux-gnu-gcc: fortranobject.c
E                                  wrapmodule.c:12:10: fatal error: Python.h: No such file or directory
E                                     12 | #include "Python.h"
E                                        |          ^~~~~~~~~~
E                                  compilation terminated.