message: Avoid unknown option for macos linker
diff: @@ -13,8 +13,10 @@ if (APPLE)
  set(CMAKE_SHARED_LINKER_FLAGS "-dynamiclib ${CMAKE_SHARED_LINKER_FLAGS_INIT}")
  set(CMAKE_CXX_FLAGS "-mmacosx-version-min=10.8 ${CMAKE_CXX_FLAGS}") # we only use MacOSX 10.8 features
  set(CMAKE_CXX_FLAGS "-stdlib=libc++ ${CMAKE_CXX_FLAGS}") # link against C++11 stdlib
  +else()
  + # avoid exporting ICC specific symbols from OSPRay
  + set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--exclude-libs=ALL ${CMAKE_SHARED_LINKER_FLAGS}")
  endif()
  -# enable -static-intel and avoid to export ICC specific symbols from OSPRay
  +# enable -static-intel
  set(CMAKE_CXX_FLAGS "-static-intel ${CMAKE_CXX_FLAGS}")
  -set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--exclude-libs=ALL ${CMAKE_SHARED_LINKER_FLAGS}")
  