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	* Makefile.def: New file.
	* Makefile.tpl: New file.
	* Makefile.in: Generate from Makefile.tpl with 'autogen Makefile.def'.
	* contrib/gcc_update: Note that Makefile.in is a generated file.

	* configure.in: Minor rearrangement.  Simplify tests.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@57484 138bc75d-0d04-0410-961f-82ee72b054a4