[patch, fortran] PR18428: use libcpp for preprocessing (review of C/C++ and fortran maintainers needed)

[Daniel Franke]

2008/5/26, Danny Smith <dansmister@gmail.com>:
>
> This patch also breaks mingw32
>
> ../../src/gcc/fortran/cpp.c: In function 'cpp_define_builtins':
> ../../src/gcc/fortran/cpp.c:222: error: 'flag_iso' undeclared (first
> use in this function)

Argh!

  TARGET_CPU_CPP_BUILTINS ();
  TARGET_OS_CPP_BUILTINS ();
  TARGET_OBJFMT_CPP_BUILTINS ();

These macros use thing undefined for fortran (as flag_iso). Adding
these things was probably not the greatest thing to do, most likely
all the non-i686-pc-linux-gnu are now broken in some way :(

/me hides