motion_capture_tracking unable to build.

[cyborgdennett]

Hello, I am trying to build crazyswarm 2 with
colcon build --symlink
But I get the following error

Finished <<< crazyflie_examples [0.92s]                                                                         
--- stderr: motion_capture_tracking                             
/usr/bin/ld: CMakeFiles/motion_capture_tracking_node.dir/src/motion_capture_tracking_node.cpp.o: in function `main':
motion_capture_tracking_node.cpp:(.text+0xc93): undefined reference to `libmotioncapture::MotionCapture::connect(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&)'
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/motion_capture_tracking_node.dir/build.make:299: motion_capture_tracking_node] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:397: CMakeFiles/motion_capture_tracking_node.dir/all] Error 2
gmake: *** [Makefile:146: all] Error 2
---
Failed   <<< motion_capture_tracking [4.00s, exited with code 2]

Summary: 6 packages finished [4.87s]
  1 package failed: motion_capture_tracking
  1 package had stderr output: motion_capture_tracking

[whoenig]

Strange linker error indeed. What OS and ROS 2 version are you using?

[cyborgdennett]

WSL, ubuntu 22.04, ROS humble