What C++03 support should <atomic> have?

There is a little bit of code in this file that suggests it once worked in C++03.

Like so:

#ifndef _LIBCPP_CXX03_LANG

__cxx_atomic_type() _NOEXCEPT = default;


__cxx_atomic_type() _NOEXCEPT : __a_value() {}

#endif // _LIBCPP_CXX03_LANG

Is that an actual design goal? It looks like it’s broken right now.

Do we maintain this, or do we bump the assumed default to C++11?

Thanks for your guidance,