https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103635
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Mark Harmstone from comment #8) > Created attachment 51976 [details] > preprocessed source Can you attach /usr/x86_64-w64-mingw32/usr/include/corecrt.h ? because I suspect it is bug there: because GCC still has __SIZE_TYPE__ as unsigned long long: # 0 "<built-in>" #define __SIZE_TYPE__ long long unsigned int