This prevents the use of the symbol "__cpu_model",  which doesn't work
correctly, for "numpy" purposes, as of LLVM 8.

--- numpy-1.16.4.old/numpy/core/setup_common.py
+++ numpy-1.16.4/numpy/core/setup_common.py
@@ -135,8 +135,8 @@
                        ("__builtin_expect", '5, 0'),
                        ("__builtin_mul_overflow", '5, 5, (int*)5'),
                        # broken on OSX 10.11, make sure its not optimized away
-                       ("volatile int r = __builtin_cpu_supports", '"sse"',
-                        "stdio.h", "__BUILTIN_CPU_SUPPORTS"),
+#                      ("volatile int r = __builtin_cpu_supports", '"sse"',
+#                       "stdio.h", "__BUILTIN_CPU_SUPPORTS"),
                        # MMX only needed for icc, but some clangs don't have it
                        ("_m_from_int64", '0', "emmintrin.h"),
                        ("_mm_load_ps", '(float*)0', "xmmintrin.h"),  # SSE