[libcxx-commits] [libcxx] [libcxx] Define `_LIBCPP_HAS_C8RTOMB_MBRTOC8` to true if compiling with clang (PR #152724)

[David Spickett via libcxx-commits]

DavidSpickett wrote:

For inspecting glibc, https://github.com/llvm/llvm-project/blob/1e84cb512748742e244d1062ef64f76764127423/libcxx/utils/libcxx/test/features.py#L278 is a feature check, and there is a function `glibc_version_less_than` that could help.

But I get the impression it has to be more than just "glibc >= some verison".

https://github.com/llvm/llvm-project/pull/152724