20010611-1.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

/* Origin: PR c/3116 from Andreas Jaeger <[e-mail]>.  */
/* When determining type compatibility of function types, we must remove
   qualifiers from argument types.  We used to fail to do this properly
   in store_parm_decls when comparing prototype and non-prototype
   declarations.  */
struct _IO_FILE {
  int _flags;
};

typedef struct _IO_FILE __FILE;
typedef struct _IO_FILE _IO_FILE;
typedef long int wchar_t;

extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
                        __FILE *__restrict __stream);

wchar_t *
fgetws (buf, n, fp)
     wchar_t *buf;
     int n;
     _IO_FILE *fp;
{
  return (wchar_t *)0;
}