[libcxx-commits] [libcxx] [libc++] Simplify the __libcpp_refstring implementation (PR #166344)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne requested changes to this pull request.

On macOS, we don't support building new code against libstdc++ anymore. However, for backwards compatibility with apps that have already been built a long time ago, we do provide `libstdc++.dylib` in the dyld shared cache.

I aslo did a search and I did find some applications available for download on the App Store which reference some symbols from libstdc++. Hence, I think we need to keep this old code, sadly 🙁

https://github.com/llvm/llvm-project/pull/166344