[libcxx-commits] [libcxx] [libc++] Make bad_function_call::what() existence a matter of availability instead of ABI (PR #127697)

[Louis Dionne via libcxx-commits]

ldionne wrote:

I didn't see any issues with this, I think this is good to merge once my comments have been addressed.

https://github.com/llvm/llvm-project/pull/127697