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	people shouldn't edit this file to choose optimization and
	debugging switches anyway.  ../configure will set CFLAGS to an
	appropriate default, which they will be able to override.
	* Makefile.in (xmakefile): Don't try to turn -g and -O in
	CFLAGS into C_DEBUG_SWITCH and C_OPTIMIZE_SWITCH.  CFLAGS should
	be the sole source of such switches, so that setting CFLAGS
	controls them completely.