[Bug c++/124347] __builtin_object_size/__builtin_dynamic_object_size doesn't work in constexpr contexts

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124347

--- Comment #8 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
To be exact, clang supports it since 19.0 version in C++23 (or later) mode: 
https://godbolt.org/z/rqzqd9eP7.
Which is fine for cosntexpr format, which is C++26 feature.