https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115122
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Build| |x86_64-linux-gnu Summary|Incorrect detection of C99 |Incorrect detection of C99 |support when |support when cross back |cross-compiling |builds Host| |x86_64-w64-mingw32 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- When I do cross back builds, I normally don't rebuild the target libraries and just use the already built target libraries from the cross builds. Since you are now building the target libraries twice and you really don't need to though.