re PR c++/9367 (error: nonnull argument with extern "C" snprintf prototype)

re PR c++/9367 (error: nonnull argument with extern "C" snprintf prototype)

	PR c++/9367
	* builtin-types.def (DEF_FUNCTION_TYPE_VAR_3): New macro.
	(BT_FN_INT_CONST_STRING_VALIST_ARG,
	BT_FN_INT_STRING_CONST_STRING_VALIST_ARG,
	BT_FN_INT_CONST_STRING_CONST_STRING_VALIST_ARG,
	BT_FN_INT_STRING_SIZE_CONST_STRING_VALIST_ARG,
	BT_FN_INT_STRING_CONST_STRING_VAR,
	BT_FN_INT_CONST_STRING_CONST_STRING_VAR,
	BT_FN_INT_STRING_SIZE_CONST_STRING_VAR): New built-in types.
	* builtin-attrs.def (ATTR_NONNULL_1, ATTR_NONNULL_2,
	ATTR_NONNULL_3): Also include the nothrow attribute.
	(sprintf, scanf, sscanf, vprintf, vsprintf, snprintf,
	vsnprintf, vscanf, vsscanf): Don't define attributes here.
	* builtins.def (putchar, puts): Make full C89 built-ins.
	(snprintf, sprintf, scanf, sscanf, vprintf, vscanf,
	vsscanf, vsnprintf, vsprintf): New built-ins.
	* c-common.c (c_common_nodes_and_builtins): Handle new macro
	DEF_FUNCTION_TYPE_VAR_3.

	* doc/extend.texi: Document these new built-in functions.

	* java/builtins.c (builtin_type): Handle DEF_FUNCTION_TYPE_VAR_3.
	(initialize_builtins): Handle DEF_FUNCTION_TYPE_VAR_3.

	* g++.old-deja/g++.other/builtins10.C: New test for PR 9367.
	* gcc.dg/format/attr-5.c: Handle new conflicting types warning.

From-SVN: r63650