ROS libraries in C++ Program

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So what I need from ROS is just to parse the messages from a rosbag2 format.

The problem is that there is also another build system used there, something internal. The thing is that I would like just to somehow be able to integrate the ros libraries for reading and parsing a rosbag.

Is there any solution or any other alternative that would make this available? I also need to mention that in our normal workspace we have an entire set of tools that are getting built.

If you have any idea that would get close, or make it working, I would really appreciate it.

THank you