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10 typedef __builtin_va_list __gnuc_va_list;

11 typedef __gnuc_va_list va_list;

12 #define va_start(v, l) __builtin_va_start(v, l)

13 #define va_end(v) __builtin_va_end(v)

14 #define va_arg(l, t) __builtin_va_arg(l, t)

15 

16 extern int vprintf(const char *format, va_list ap);

17 extern int vfprintf(FILE *stream, const char *format, va_list ap);

18 extern int vsprintf(char *str, const char *format, va_list ap);

19 extern int vsnprintf(char *str, size_t size, const char *format, va_list ap);

20