libomp: incorrect LC_RPATH referenced in libxgboost.dylib

[Ubiquitous]

Upon installing libomp I noticed that there was an error related to not finding 'libxgboost.dylib'. Apparently the rcpath references an absolute 'homebrew' directory (I don't use homebrew).

% otool -l /opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/xgboost/lib/libxgboost.dylib
...
Load command 15
          cmd LC_RPATH
      cmdsize 48
         path /opt/homebrew/opt/libomp/lib (offset 12)
..

It can be fixed with:

% sudo install_name_tool -rpath /opt/homebrew/opt/libomp/lib /opt/local/lib/libomp /opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/xgboost/lib/libxgboost.dylib

Now the rpath is correct:

% otool -l /opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/xgboost/lib/libxgboost.dylib 
...
Load command 15
          cmd LC_RPATH
      cmdsize 40
         path /opt/local/lib/libomp (offset 12)
...

This should probably fixed in the port as to avoid frustrations for anyone installing libomp.