limited compiler-rt support in llvm-15?

[Haugen, Kjetil]

[AMD Official Use Only - General]

Hello!

I'm in the process creating guix packages for rocm using upstream clang. I 
noticed that for clang-runtime-15, guix now explicitly deletes all static 
libraries which makes the packages with -rtlib=compiler-rt fail due to missing 
libclang_rt.builtins-x86_64.a. Is there any particular reason why guix made 
that change between clang-runtime-14 and clang-runtime-15? I'd like to propose 
to revert that change. I know I can always create my own clang-runtime-15 
variant, but I was hoping to avoid the additional complexity of maintaining 
custom versions of clang-runtime and all the packages that depend on it.

Thanks,
KJ