[Bug libstdc++/108035] libstdc++ implementation of std::source_location::function_name() provides an empty string when used with clang++

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108035

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Right, if Clang doesn't provide a name then there's nothing libstdc++ can do
about it.