What does "Files with missing rpath" mean and how can I fix this?

[eleanordoesntcode]

Output of brew config

Not applicable. Error happens on a GitHub Runner

Output of brew doctor

Same.

Description of issue

I'm currently updating the projectm formulae, which installs among other things some dynamic libraries, and I'm getting the error "Files with missing rpath:
/opt/homebrew/Cellar/projectm/4.1.2/lib/libprojectM-4-playlist.4.1.2.dylib" at the brew linkage --cached --test --strict projectm step. Why does it happen and how can I fix this?

[p-linnane]

An rpath is like a map to find shared libraries. I looked at your PR, and you probably just need to add "-DCMAKE_INSTALL_RPATH=#{rpath}" right before *std_cmake_args.

[eleanordoesntcode]

Thanks a lot! I'll try this.

[eleanordoesntcode]

Sadly this hasn't solved the problem, although that's not the only problem I'm encountering with this build, so I think it'll take me a few more days to do this.