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

[jakub at gcc dot gnu.org via Gcc-bugs]

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

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Grep shows that clang predefines that macro if -fsized-deallocation is used.
But why that option doesn't default to on for C++14 is hard to understand.