merge from gcc:

merge from gcc:
2004-04-27  Paolo Bonzini  <bonzini@gnu.org>

	Revert:
	2004-04-26  Paolo Bonzini  <bonzini@gnu.org>

	* Makefile.def (flags_to_pass): Remove *dir variables that
	are passed to the modules via TOPLEVEL_CONFIGURE_ARGUMENTS,
	as well as prefix and exec_prefix.
	* Makefile.in: Regenerate.

2004-04-26  Paolo Bonzini  <bonzini@gnu.org>

	* Makefile.def (host_modules): Mark with the bootstrap
	flag packages on which gcc depends.
	* Makefile.tpl (all-bootstrap): Use it.
	* Makefile.in: Regenerate.

2004-04-26  Paolo Bonzini  <bonzini@gnu.org>

	* Makefile.def (flags_to_pass): Remove *dir variables that
	are passed to the modules via TOPLEVEL_CONFIGURE_ARGUMENTS,
	as well as prefix and exec_prefix.
	* Makefile.in: Regenerate.

2004-04-26  Paolo Bonzini  <bonzini@gnu.org>

        * configure.in: Invoke ACX_PROG_CMP_IGNORE_INITIAL.
        * configure: Regenerate.
        * config/acx.m4: Mutuate ACX_PROG_CMP_IGNORE_INITIAL from gcc.
        * gcc/Makefile.tpl (compare): Use the result of the test.
        * gcc/Makefile.in: Regenerate.

2004-04-23  Paolo Bonzini  <bonzini@gnu.org>

	* Makefile.tpl (all-stage1-gcc, all-stage2-gcc, all-stage3-gcc):
	Always relocate gcc and prev-gcc to the original names, even
	if the build fails.
	(new-cleanstrap, new-restage1, new-restage2, new-restage3):
	New targets.