Handle conflict between conventional build and CMake build in lib/gpu

[akohlmey]

Summary

When compiling the GPU package with CUDA, it will silently pick up inconsistent cubin header files from the lib/gpu folder that were left over from a legacy compile and thus may cause kernels to fail, if there is a mismatch. This PR adds a check for those and prints and error message if found and a suggested command to remove them.

Author(s)

Axel Kohlmeyer, Temple U

Licensing

By submitting this pull request, I agree, that my contribution will be included in LAMMPS and redistributed under either the GNU General Public License version 2 (GPL v2) or the GNU Lesser General Public License version 2.1 (LGPL v2.1).

Backward Compatibility

Yes.

Post Submission Checklist

• The feature or features in this pull request is complete
• Licensing information is complete
• Corresponding author information is complete
• The source code follows the LAMMPS formatting guidelines
• Suitable new documentation files and/or updates to the existing docs are included
• The added/updated documentation is integrated and tested with the documentation build system
• The feature has been verified to work with the CMake based build system