https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97044
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- The C99 standard says that __STDC_FORMATE_MACROS must be defined before including the header. The C++11 standard is clear that __STDC_FORMAT_MACROS has no effect in C++ programs, and the header must defined the format macros unconditionally. AIX apparently follows the C99 rule, even though obviously the C++ standard defines how C++ works, not C. This is a bug in the AIX headers.
