* config/pdp11/pdp11.h (target_flags, TARGET_SWITCHES, TARGET_DEFAULT)

	* config/pdp11/pdp11.h (target_flags, TARGET_SWITCHES, TARGET_DEFAULT)
	(TARGET_FPU, TARGET_SOFT_FLOAT, TARGET_AC0, TARGET_NO_AC0, TARGET_45)
	(TARGET_BCOPY_BUILTIN, TARGET_INT16, TARGET_INT32, TARGET_FLOAT32)
	(TARGET_FLOAT64, TARGET_ABSHI_BUILTIN, TARGET_BRANCH_EXPENSIVE)
	(TARGET_BRANCH_CHEAP, TARGET_SPLIT, TARGET_NOSPLIT)
	(TARGET_UNIX_ASM): Delete.
	(TARGET_40_PLUS): Redefine in terms of TARGET_40 and TARGET_45.
	* config/pdp11/2bsd.h (TARGET_UNIX_ASM_DEFAULT): Use MASK_UNIX_ASM.
	* config/pdp11/pdp11.c (pdp11_handle_option): New function.
	(TARGET_DEFAULT_TARGET_FLAGS, TARGET_HANDLE_OPTION): Override defaults.
	* config/pdp11/pdp11.opt: New file.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@97525 138bc75d-0d04-0410-961f-82ee72b054a4