Unable to use exported libraries due to relative imports in header

[dimasad]

Required Info:

• Operating System:
  • Ubuntu 20.04
• Installation type:
  • From source
• ROS Version
  • ROS2 Galactic
• Version or commit hash:
  • fab61e1225d6c1ee5d634a4851b0a387c11c2c39
• Laser unit:
  • Any

Steps to reproduce issue

• Create a new package that depends on slam_toolbox.
• Include slam_toolbox/slam_toolbox_common.hpp or slam_toolbox/serialization.hpp to deserialize a posegraph, for example.
• Attempt to compile.

Expected behavior

The toolbox types can be used in another package.

Actual behavior

It fails to compile because the imports in the headers are relative, so only slam_toolbox can be compiled. There's a comment that says "god... getting this to work in ROS2 was a real pain", so I believe that it the fix broke inter-package compatibility.

Additional information

[SteveMacenski]

PRs have been merged - closing