* target.def (target_option.init_struct): New hook.
	* doc/tm.texi.in (TARGET_OPTION_INIT_STRUCT): New @hook.
	* doc/tm.texi: Regenerate.
	* hooks.c (hook_void_gcc_optionsp): New.
	* hooks.h (hook_void_gcc_optionsp): Declare.
	* langhooks-def.h (lhd_init_options_struct): Remove.
	(LANG_HOOKS_INIT_OPTIONS_STRUCT): Define to
	hook_void_gcc_optionsp.
	* langhooks.c (lhd_init_options_struct): Remove.
	* opts.c (init_options_struct): Also call
	targetm.target_option.init_struct.
	* config/i386/i386.c (ix86_option_init_struct,
	TARGET_OPTION_INIT_STRUCT): New.
	(ix86_option_optimization): Move some settings to
	ix86_option_init_struct.
	* config/pdp11/pdp11.c (pdp11_option_init_struct,
	TARGET_OPTION_INIT_STRUCT): New.
	(pdp11_option_optimization): Move some settings to
	pdp11_option_init_struct.
	* config/rs6000/rs6000.c (rs6000_option_optimization): Replace by
	rs6000_option_init_struct.  Use options structure pointer.
	(TARGET_OPTION_OPTIMIZATION): Replace by
	TARGET_OPTION_INIT_STRUCT.
	* config/s390/s390.c (s390_option_init_struct,
	TARGET_OPTION_INIT_STRUCT): New.
	(s390_option_optimization): Don't set
	flag_asynchronous_unwind_tables here.
	* config/sh/sh.c (sh_option_init_struct,
	TARGET_OPTION_INIT_STRUCT): New.
	(sh_option_optimization): Don't set flag_finite_math_only here.
	* config/spu/spu.c (spu_option_optimization): Replace by
	spu_option_optimization.  Use options structure pointer.
	(TARGET_OPTION_OPTIMIZATION): Replace by
	TARGET_OPTION_INIT_STRUCT.

From-SVN: r165519