# define skip_end } while(0)
unsigned int _gen_result(int, const char *, const char *, unsigned int,
# define skip_end } while(0)
unsigned int _gen_result(int, const char *, const char *, unsigned int,
-void skip(unsigned int n, const char *fmt, ...) PRINTF_ATTRIBUTE(2, 3);
+void skip(unsigned int n, const char *fmt, ...) PRINTF_FMT(2, 3);