* config.gcc <cris-*>: Specify .opt files.
	* config/cris/cris.opt, config/cris/elf.opt, config/cris/aout.opt,
	config/cris/linux.opt: New files.
	* config/cris/aout.h (CRIS_SUBTARGET_SWITCHES)
	(CRIS_SUBTARGET_LONG_OPTIONS): Don't define.
	(TARGET_ELF): Override to 0.
	(CRIS_SUBTARGET_HANDLE_OPTION): Override to handle -melinux and
	-melinux-stacksize=N.
	* config/cris/cris.c: (cris_handle_option): New function.
	(TARGET_DEFAULT_TARGET_FLAGS): Override.
	(TARGET_HANDLE_OPTION): Override to cris_handle_option.
	(cris_override_options): Use MASK_*, not TARGET_MASK_*.
	* config/cris/cris.h (TARGET_MASK_SVINTO, TARGET_SVINTO,
	(TARGET_MASK_CCINIT, TARGET_CCINIT, TARGET_MASK_PDEBUG)
	(TARGET_PDEBUG, TARGET_MASK_SIDE_EFFECT_PREFIXES)
	(TARGET_SIDE_EFFECT_PREFIXES, TARGET_MASK_EXPAND_MUL)
	(TARGET_EXPAND_MUL, TARGET_MASK_STACK_ALIGN, TARGET_STACK_ALIGN)
	(TARGET_MASK_CONST_ALIGN, TARGET_CONST_ALIGN)
	(TARGET_MASK_DATA_ALIGN, TARGET_DATA_ALIGN)
	(TARGET_MASK_PROLOGUE_EPILOGUE, TARGET_PROLOGUE_EPILOGUE)
	(TARGET_MASK_ETRAX4_ADD, TARGET_ETRAX4_ADD)
	(TARGET_MASK_ALIGN_BY_32, TARGET_ALIGN_BY_32, TARGET_MASK_ELF)
	(TARGET_ELF, TARGET_MASK_LINUX, TARGET_LINUX)
	(TARGET_MASK_AVOID_GOTPLT, TARGET_AVOID_GOTPLT)
	(TARGET_MASK_MUL_BUG, TARGET_MUL_BUG, TARGET_SWITCHES)
	(CRIS_SUBTARGET_SWITCHES, TARGET_OPTIONS)
	(CRIS_SUBTARGET_LONG_OPTIONS): Don't define.
	(TARGET_LINUX): Define 0.
	(TARGET_DEFAULT): Use MASK_*, not TARGET_MASK_*.
	(CRIS_SUBTARGET_DEFAULT): Define to 0, not TARGET_MASK_ELF.
	(CRIS_SUBTARGET_DEFAULT): New empty default macro.
	* config/cris/linux.h (CRIS_SUBTARGET_SWITCHES): Don't define.
	(TARGET_LINUX): Override to 1.
	(CRIS_SUBTARGET_DEFAULT): Use MASK_*, not TARGET_MASK_*.

From-SVN: r98611