Use relative path for CMAKE_INSTALL_LIBDIR

[robertmaynard]

The CMAKE_INSTALL_LIBDIR needs to be relative for the CCCL-config.cmake packaged with librmm to work properly.

This is exactly what the upstream rapidsai version of librmm does ( https://github.com/rapidsai/rmm/blob/branch-24.04/conda/recipes/librmm/build.sh#L3 )

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[kkraus14]

The CMAKE_INSTALL_LIBDIR needs to be relative for the CCCL-config.cmake packaged with librmm to work properly

We can make the change here, but this seems like a bug in the CCCL-config.cmake? Can this be fixed upstream as well?

[robertmaynard]

The CMAKE_INSTALL_LIBDIR needs to be relative for the CCCL-config.cmake packaged with librmm to work properly

We can make the change here, but this seems like a bug in the CCCL-config.cmake? Can this be fixed upstream as well?

Absolute values for CMAKE_INSTALL_LIBDIR aren't truly fully supported by cmake, since the cmake --install <dir> --prefix command will cause a CMAKE_INSTALL_PREFIX to change, but not recompute things like CMAKE_INSTALL_LIBDIR.

This will cause any generated <project>-targets.cmake to be fundamentally broken as they will reference the CMAKE_INSTALL_PREFIX that was computed at configure time, and not the one at install time via the --prefix command.

While CCCL can be updated to better support absolute CMAKE_INSTALL_LIBDIR values, no promise can be made about correct/valid installations due to fundamental issue around using absolute values.

[jakirkham]

As to CCCL-config.cmake, would it make sense to file an issue on RMM (or maybe also CCCL)?

[robertmaynard]

As to CCCL-config.cmake, would it make sense to file an issue on RMM (or maybe also CCCL)?
CCCL issue has been opened:
NVIDIA/cccl#1390

[jakirkham]

Thanks Robert and Keith! 🙏