issue with swig 4.2.0

[randaz81]

Swig 4.2.0 seems not to work properly with yarp master: when compiling I get this error "Type Error. Expecting an integral type" on some enums.

I reported the error here: swig/swig#2796

The recommended version of swing to use is thus 4.0.2

[traversaro]

Did you tried with swig master? I think the fix for swig/swig#2783 should have fixed yarp generation, but perhaps I was testing an earlier version of YARP.

[randaz81]

It looks like that Ubuntu 24.04 is currently including by default swig 4.2.0

[traversaro]

It looks like that Ubuntu 24.04 is currently including by default swig 4.2.0

Yes, unfortunately Ubuntu 24.04 got released in the unlucky windows between swig 4.2.0 and 4.2.1 . In the superbuild to handle this case we download (just on Ubuntu 24.04 when compiling with apt dependencies) a private swig binary that is just used for YARP: robotology/robotology-superbuild#1642 and https://github.com/robotology/robotology-superbuild/blob/df8e0567f194ca410581a8ddc36fa30880c25f3a/cmake/RobotologySuperbuildLogic.cmake#L39-L64 .

[randaz81]

Thank you @traversaro , I'll follow your suggestion for Yarp CI with Ubuntu 24.04

[PeterBowman]

On a side note, it seems that SWIG 4.2.0 is preinstalled on Ubuntu 24.04 runners for GitHub Actions. I had to remove the "swig" package via apt before building it from sources.