[Bug libstdc++/108391] '::operator delete(void*, size_t)' was not found when clang compiled libstdc++

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108391

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oh clang isn't using it, you're using it explicitly. So then that's a bug in
your code. You shouldn't use it unless the macro is defined to say that it's
usable.