Index: head/graphics/embree/files/patch-common_math_math.h
===================================================================
--- head/graphics/embree/files/patch-common_math_math.h	(revision 416110)
+++ head/graphics/embree/files/patch-common_math_math.h	(revision 416111)
@@ -1,11 +1,20 @@
 --- common/math/math.h.orig	2016-05-20 05:45:13 UTC
 +++ common/math/math.h
+@@ -83,7 +83,7 @@ namespace embree
+     return _mm_cvtss_f32(c);
+   }
+ 
+-#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); }
 @@ -179,7 +179,7 @@ namespace embree
    }
  #endif
  
 -#if defined(__WIN32__)
 +#if defined(__WIN32__) || defined(__FreeBSD__)
    __forceinline void sincosf(float x, float *s, float *c) {
      *s = sinf(x); *c = cosf(x);
    }