target-def.h (TARGET_CXX_GUARD_TYPE, [...]): Define.

target-def.h (TARGET_CXX_GUARD_TYPE, [...]): Define.

gcc/
	* target-def.h (TARGET_CXX_GUARD_TYPE, TARGET_CXX_GUARD_MASK_BIT,
	TARGET_CXX): Define.
	(TARGET_INITIALIZER): Use TARGET_CXX.
	* target.h (struct gcc_target): Add struct cxx.
	* targhooks.h (default_cxx_guard_type): Add prototype.
	* targhooks.c (default_cxx_guard_type): New function.
	* config/arm/arm.c (TARGET_CXX_GUARD_TYPE, TARGET_CXX_GUARD_MASK_BIT):
	Define.
	(arm_cxx_guard_type, arm_cxx_guard_mask_bit): New functions.
	* doc/tm.texi: Document TARGET_CXX_GUARD_TYPE and
	TARGET_CXX_GUARD_MASK_BIT.
gcc/cp/
	* decl2.c (get_guard): Call targetm.cxx.guard_type.
	(get_guard_bits, get_guard_cond): Call targetm.cxx.guard_mask_bit.
libstdc++/
	* libsupc++/cxxabi.h: Define __ARM_EABI__
	(__guard): Use it.
	* libsupc++/guard.h (__cxa_guard_acquire, __cxa_guard_release): Ditto.

From-SVN: r83660