* Makefile.in (STMP_FIXINC): New toggle.
(LIBGCC2_DEPS): Delete all references.
(stmp-headers): Delete target. All references either deleted
or changed to stmp-int-headers.
(all.cross): Don't depend on stmp-headers or STMP_FIXPROTO.
(LIBCPP_OBJS): Take out cppalloc.o.
(cppalloc.o): Delete target.
(stmp-int-hdrs): Depend on $(STMP_FIXINC).
(gen-protos, fix-header): Link with libiberty.a.
* build-make: Don't change FIXINCLUDES. Override STMP_FIXINC
to empty.
* cp/Make-lang.in: Delete refs to LIBGCC2_DEPS.
* configure.in: Remove refs to strerror.
* acconfig.h: Take out NEED_DECLARATION_STRERROR.
* system.h: Take out strerror stanza.
* cpperror.c (my_strerror): Delete function.
(cpp_error_from_errno, cpp_notice_from_errno): Use xstrerror.
* cppmain.c (main): Call xmalloc_set_program_name first thing.
* cppalloc.c: Delete file.
* gen-protos.c: Don't provide xrealloc.
* fixinc/fixincl.c, fixinc/fixlib.c, fixinc/procopen.c: Use
xstrerror throughout.