#ifndef _STDARG_H#define _STDARG_H typedef __builtin_va_list va_list;#define va_start __builtin_va_start#define va_arg __builtin_va_arg#define va_copy __builtin_va_copy#define va_end __builtin_va_end /* fix a buggy dependency on GCC in libio.h */typedef va_list __gnuc_va_list;#define _VA_LIST_DEFINED #endif /* _STDARG_H */