http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53502
--- Comment #9 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-05-30 16:52:17 UTC --- (In reply to comment #8) > New Revision: 188024 That patch removed the typedef from gcc/fortran/decl.c. Hence, --disable-build-poststage1-with-cxx should work now. Whether GCC should warn for the typedef in C or in C++ mode or in both or in neither, I leave to the experts. See comment 6 for observations related to the latter.