+/* Mark a function as taking a printf- or scanf-like format
+ string as its FMT'th argument and that the FIRST'th argument
+ is the first one to be checked against the format string. */
+#define PRINTF_FORMAT(FMT, FIRST) ATTRIBUTE ((format (__printf__, FMT, FIRST)))
+#define SCANF_FORMAT(FMT, FIRST) ATTRIBUTE ((format (__scanf__, FMT, FIRST)))
+
+/* Tells the compiler that a function may be treated as if any
+ non-`NULL' pointer it returns cannot alias any other pointer
+ valid when the function returns. */