TST: Add Cygwin to the x86 feature tests.

DWesl · DWesl · commit a354884b1ab1 · 2021-04-13T21:53:31.000-04:00
This was suggested by @seiko2plus for debugging a segfault in the tests on Cygwin: numpy#18102 (comment) This test passes on Cygwin, and the whole testsuite has only the failures I expect from running on Cygwin (see numpy#18102 and numpy#16246).
diff --git a/numpy/core/tests/test_cpu_features.py b/numpy/core/tests/test_cpu_features.py
@@ -104,9 +104,10 @@ def load_flags_auxv(self):
                 )
 
 is_linux = sys.platform.startswith('linux')
+is_cygwin = sys.platform.startswith('cygwin')
 machine  = platform.machine()
 is_x86   = re.match("^(amd64|x86|i386|i686)", machine, re.IGNORECASE)
-@pytest.mark.skipif(not is_linux or not is_x86, reason="Only for Linux and x86")
+@pytest.mark.skipif(not (is_linux or is_cygwin) or not is_x86, reason="Only for Linux and x86")
 class Test_X86_Features(AbstractTest):
     features = [
         "MMX", "SSE", "SSE2", "SSE3", "SSSE3", "SSE41", "POPCNT", "SSE42",
