Try to fix atomic.lib on msvc

https://stackoverflow.com/a/64112384

Author: christophfroehlich

CMakeLists.txt

@@ -16,8 +16,6 @@ if(WIN32)
   )
   # set the same behavior for windows as it is on linux
   set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
-
-  set(FOUND_LIBATOMIC TRUE)
 endif()
 
 set(THIS_PACKAGE_INCLUDE_DEPENDS
@@ -84,6 +82,11 @@ if(BUILD_TESTING)
   ament_add_gmock(realtime_buffer_tests test/realtime_buffer_tests.cpp)
   target_link_libraries(realtime_buffer_tests realtime_tools)
 
+  if(WIN32)
+    set(HAVE_CXX_ATOMICS64_WITHOUT_LIB True)
+    set(HAVE_CXX_ATOMICS_WITHOUT_LIB True)
+    set(FOUND_LIBATOMIC TRUE)
+  endif()
   ament_add_gmock(lock_free_queue_tests test/lock_free_queue_tests.cpp)
   target_link_libraries(lock_free_queue_tests realtime_tools atomic Boost::boost)