message: Set a cmake policy to apply visibility to static libs too.
diff: @@ -32,7 +32,10 @@ set(CMAKE_DEBUG_POSTFIX ${CESIUM_DEBUG_POSTFIX})
  set(CMAKE_RELEASE_POSTFIX ${CESIUM_RELEASE_POSTFIX})
  set(CMAKE_MINSIZEREL_POSTFIX ${CESIUM_RELEASE_POSTFIX})
  set(CMAKE_RELWITHDEBINFO_POSTFIX ${CESIUM_RELEASE_POSTFIX})
  +
  +cmake_policy(SET CMP0063 NEW)
  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
  +set(CMAKE_VISIBILITY_INLINES_HIDDEN on)
  add_subdirectory(cesium-native)
  