PR bootstrap/22340

	* configure.in (default_target): Remove.
	* Makefile.tpl (all): Do not use prerequisites as subroutines
	(all) [gcc-bootstrap]: Bootstrap gcc first if it was not done yet.
	(do-[+make_target+], check, install, [+bootstrap_target+]): Do not
	use prerequisites as subroutines.
	(check-host, check-target): New.
	(bootstrap configure & all targets): Do not use stage*-start
	if the directory layout is already ok.
	(non-bootstrap configure & all targets): Prepend a $(unstage).
	(stage[+id+]-bubble): Do that here.  Do not use NOTPARALLEL.
	(NOTPARALLEL): Remove.
	(unstage, stage variables): New variables.
	(unstage, stage targets): Simply expand to those variables.

	* configure: Regenerate.
	* Makefile.in: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@104978 138bc75d-0d04-0410-961f-82ee72b054a4