rx-opts.h: New.

rx-opts.h: New.

	* config/rx/rx-opts.h: New.
	* config/rx/rx.c (rx_cpu_type): Remove.
	(rx_handle_option): Don't assert that global structures are in
	use.  Access variables via opts pointer.  Defer most handling of
	OPT_mint_register_.  Use error_at.
	(rx_option_override): Handle deferred OPT_mint_register_ here.
	* config/rx/rx.h (enum rx_cpu_types): Move to rx-opts.h.
	* config/rx/rx.opt (config/rx/rx-opts.h: New HeaderInclude.
	(mcpu=): Use Enum and specifiy rx_cpu_type with Var.
	(rx_cpu_types): New Enum and EnumValue entries.
	(mint-register=): Use Defer and use Var accordingly.

From-SVN: r171984