* Make-lang.in (check-g++-strict-gc): New.
	(cp/except.o): Depend on gt-cp-except.h
	* except.c: Include gt-cp-except.h.
	* config-lang.in (gtfiles): Add cp/except.c.
	* decl2.c (mark_used): Adjust constexpr condition, set
	function_depth around template instantiation.
	* parser.c (cp_parser_lambda_body): Set function_depth.
	* semantics.c (maybe_add_lambda_conv_op): Likewise.

From-SVN: r176350