https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100486
--- Comment #40 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > Do you want a full rebuild of gcc? At least a full rebuild of libstdc++-v3: rm -rf i686-w64-mingw32/libstdc++-v3 make all-target-libstdc++-v3 -jN