https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100461
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2021-05-06 Ever confirmed|0 |1 Status|UNCONFIRMED |WAITING --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- To me this looks like a bug in mingw-w64-crt rather than a bug in GCC. A simple fix to the mingw-w64-crt sources is just do: unsigned __int64 (__rdtsc)(void)