message: Compile fix / workaround for macOS+CUDA
diff: @@ -5,6 +5,12 @@ if(NOT BUILD_SHARED_LIBS)
  add_definitions(-DVSNRAY_STATIC)
  endif()
  +if(APPLE AND VSNRAY_ENABLE_CUDA)
  + # Work around an incompatibility between
  + # boost::std_category and std::error_category
  + add_definitions(-DBOOST_NO_CXX11_HDR_SYSTEM_ERROR)
  +endif()
  +
  add_subdirectory(common)
  if(VSNRAY_ENABLE_EXAMPLES)
  