Per my understanding XXX_BUILDING_DLL macro only should be enabled when building on Windows, right? If that's true, I don't understand why "if(WIND32)" guard is missed in so many projects, such as ament it self. Could anybody explain it? Thanks --- [Visit Topic](https://discourse.ros.org/t/if-win32-guard-is-missed-for-many-projects-in-ros2/2281/1) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: