util: fix a warning when building against clang7 headers

Header xmmintrin.h conditionally includes emmintrin.h that defines
_MM_DENORMALS_ZERO_MASK, add ifndef to fix this warning.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

diff --git a/src/util/u_math.c b/src/util/u_math.c
index c58af911be7400b043c7a3d38a94eaadfacb5e2a..63511554bf4641b7f55360ed3c2a76e3d4b07585 100644 (file)
--- a/src/util/u_math.c
+++ b/src/util/u_math.c
@@ -35,8 +35,10 @@
 #include <xmmintrin.h>
 /* This is defined in pmmintrin.h, but it can only be included when -msse3 is
  * used, so just define it here to avoid further. */
+#ifndef _MM_DENORMALS_ZERO_MASK
 #define _MM_DENORMALS_ZERO_MASK        0x0040
 #endif
+#endif
 
 
 /** 2^x, for x in [-1.0, 1.0) */