Help needed: banishing RTL from the front ends

[Paolo Bonzini]

> gcc/ChangeLog:
>          * Makefile.in (ALL_CFLAGS): Add file-specific CFLAGS.
>          (ALL_HOST_FRONTEND_OBJS): New, for all front-end specific objects.
>          (ALL_HOST_BACKEND_OBJS): New, for all backend and target objects.
>          (ALL_HOST_OBJS): Now a union of the above two.
>          <section "Language makefile fragments">: Add -DIN_GCC_FRONTEND for
>          all files in ALL_HOST_FRONTEND_OBJS.
>          * system.h: Poison GCC_RTL_H if IN_GCC_FRONTEND is defined.

Please add a comment here.

Otherwise okay.

Paolo