Please ask such questions on http://answers.ros.org following the support guidelines: http://wiki.ros.org/Support. ROS Discourse is for news and general interest discussions. ROS Answers provides a forum which can be filtered by tags to make sure the relevant people can find and/or answer the question, and not overload everyone with hundreds of posts. Additionally, when you ask questions be sure to include as much information as possible. In this case that would include your `CMakeLists.txt` file. --- [Visit Topic](https://discourse.ros.org/t/some-problems-about-creating-my-first-msg/4780/3) 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: