--- graphics/embree/files/patch-common_math_math.h	(nonexistent)
+++ graphics/embree/files/patch-common_math_math.h	(working copy)
@@ -0,0 +1,11 @@ 
+--- common/math/math.h.orig	2015-09-17 06:11:18 UTC
++++ common/math/math.h
+@@ -91,7 +91,7 @@ namespace embree
+   __forceinline float rsqrt( const float x ) { return 1.0f/sqrtf(x); }
+ #endif
+ 
+-#if !defined(__WIN32__)
++#if !defined(__WIN32__) && (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 3800)
+   __forceinline float abs  ( const float x ) { return ::fabsf(x); }
+   __forceinline float acos ( const float x ) { return ::acosf (x); }
+   __forceinline float asin ( const float x ) { return ::asinf (x); }