* defaults.h (DEFAULT_WORD_SWITCH_TAKES_ARG,
	WORD_SWITCH_TAKES_ARG): Remove.
	* doc/options.texi (Args): Document.
	* doc/tm.texi.in (WORD_SWITCH_TAKES_ARG): Remove.
	* doc/tm.texi: Regenerate.
	* opt-functions.awk (switch_flags): Handle Args.
	* opts-common.c: Update comment on tm.h include.
	(decode_cmdline_option): Handle options with multiple arguments.
	Don't check WORD_SWITCH_TAKES_ARG for unknown options.
	* opts.h (CL_SEPARATE_NARGS_SHIFT, CL_SEPARATE_NARGS_MASK):
	Define.
	(CL_PARAMS, CL_WARNING, CL_OPTIMIZATION, CL_DRIVER, CL_TARGET,
	CL_COMMON): Update values.
	* system.h (WORD_SWITCH_TAKES_ARG): Poison.
	* config/darwin.h (WORD_SWITCH_TAKES_ARG): Remove.
	* config/darwin.opt (Zsegaddr, sectalign, sectcreate,
	sectobjectsymbols, sectorder, segcreate, segprot): New.

From-SVN: r166359