message: Don't directly use private macros
  (Visionaray private macros are suffixed with __)
diff: #include "forward.h"
  #include "intrinsics.h"
  -#if VSNRAY_SIMD_ISA__ == 0
  +#if VSNRAY_NO_SIMD_ISA
  namespace MATH_NAMESPACE
  {
  @@ -82,6 +82,6 @@ public:
  #include "detail/builtin/float4.inl"
  #include "detail/builtin/int4.inl"
  -#endif // VSNRAY_SIMD_ISA__ == 0
  +#endif // VSNRAY_NO_SIMD_ISA
  #endif // VSNRAY_SIMD_BUILTIN_H
  