https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85145
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |mingw-w64 Component|c++ |libstdc++ Target Milestone|--- |8.0 Summary|GCC 8 regression: |[8 Regression] include_next |include_next broken icw/ |broken icw/ |--with-gxx-include-dir |--with-gxx-include-dir --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Using --with-gxx-include-dir works just fine for me with a native compiler. I suppose your setup is a cross?