fmt = va_arg (arg, char *);
fmt = va_arg (arg, const char *); #else va_start (arg, fmt); #endif
finfo (va_alist)     va_dcl{  char *fmt;  FILE *file;  va_list arg;  va_start (arg);  file = va_arg (arg, FILE *);  fmt = va_arg (arg, char *);  vfinfo (file, fmt, arg);  va_end (arg);}