https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65473
--- Comment #2 from Louis Dionne <ldionne.2 at gmail dot com> --- Does the standard specify which headers should define those macros? If not, then it's a QOI issue that could easily be solved. In all cases, does stdcxx document which headers must be included in order to get those definitions? I couldn't find it.
