[libcxx-commits] [libcxx] [libc++] Don't try to be compatible with libstdc++ in __libcpp_refstring on iOS (PR #170816)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne approved this pull request.

Based on prior research when discussing #166344, I believe this is fine to do. There shouldn't be iOs apps shipping with libstdc++ anymore since that dylib is not provided on the system.

We can have a separate patch/discussion for macOS, where the situation is different.

https://github.com/llvm/llvm-project/pull/170816