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-rw-r--r--numpy/core/setup_common.py1
1 files changed, 0 insertions, 1 deletions
diff --git a/numpy/core/setup_common.py b/numpy/core/setup_common.py
index 4633aef84..bad3607fa 100644
--- a/numpy/core/setup_common.py
+++ b/numpy/core/setup_common.py
@@ -116,7 +116,6 @@ OPTIONAL_INTRINSICS = [("__builtin_isnan", '5.'),
("__builtin_bswap32", '5u'),
("__builtin_bswap64", '5u'),
("__builtin_expect", '5, 0'),
- ("__builtin_ctz", '5'),
("_mm_load_ps", '(float*)0', "xmmintrin.h"), # SSE
("_mm_load_pd", '(double*)0', "emmintrin.h"), # SSE2
]