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	options.
	* config/i386/darwin.h (ASM_SPEC): New.
	(SUBTARGET_EXTRA_SPECS): New.
	* config/rs6000/darwin.h (ASM_SPEC): New.
	(SUBTARGET_EXTRA_SPECS): New.
	* configure.in: Don't set CROSS or SYSTEM_HEADER_DIR when building
	a cross-compiler between two different processors on Darwin.
	* configure: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@70589 138bc75d-0d04-0410-961f-82ee72b054a4