message: osx/macos do not know libatomic, add another case for it
diff: @@ -230,6 +230,8 @@ find_package(Threads REQUIRED)
  if(MSVC)
  target_link_libraries(oatpp PUBLIC ${CMAKE_THREAD_LIBS_INIT} wsock32 ws2_32)
  +elseif(APPLE)
  + target_link_libraries(oatpp PUBLIC ${CMAKE_THREAD_LIBS_INIT})
  else(MSVC)
  target_link_libraries(oatpp PUBLIC ${CMAKE_THREAD_LIBS_INIT} atomic)
  endif(MSVC)
  