Exporting <package-name>Config.cmake files with no targets.

[olivier-stasse]

When having pure data package, typically robot_description kind of packages, the Config.cmake files are very handy.
However they do not have targets. In the current writing of the SETUP_PROJECT_PACKAGE_FINALIZE macro the INSTALL( export ) calls fails because they are no targets to export.
IMHO the correct behavior is to not call this install when there is no target.

[nim65s]

Hi @olivier-stasse,

Where do you have this issue ?
All SoT packages have at least an INTERFACE target, eg. :

https://github.com/stack-of-tasks/tiago_data/blob/75750a1da675319f30534e3383a657e9178e8d60/CMakeLists.txt#L19

[olivier-stasse]

talos_data when gazebo is not detected.

[nim65s]

Can you please open an issue on talos-data, before working further on that topic ? This looks like stack-of-tasks/talos-data#2 to me.

[olivier-stasse]

I respectfully disagree. jrl-cmakemodules should be able to handle package with no target.

[olivier-stasse]

But of course this is a personal opinion that should be discussed openly and I will go towards the community decision.
Note: my solution is partial. Because Config.cmake.in impose to include Targets.cmake this later trigger an error on a package using it.

[nim65s]

I agree, jrl-cmakemodules should be able to handle package with no target. But I would like to understand the issue you are trying to solve on talos-data. That was the topic I was speaking of, sorry this was not clear.

[olivier-stasse]

Fixed by PR #408