llvm-project

d522b1b3 - [libcxx] Define `_LIBCPP_HAS_C8RTOMB_MBRTOC8` to true if compiling with clang (#152724)

[libcxx] Define `_LIBCPP_HAS_C8RTOMB_MBRTOC8` to true if compiling with clang (#152724) Define `_LIBCPP_HAS_C8RTOMB_MBRTOC8` to `1` if compiling with clang. Some tests involving functionality from `uchar.h`/`cuchar` fail when the platform or the supporting C library does not provide support for the corresponding features. These have been xfailed. This patch will enable the adoption of newer picolibc versions.