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int i;

double d;

/* Make sure we return a constant.  */

float rootbeer[__builtin_types_compatible_p (int, typeof(i))];

typedef enum { hot, dog, poo, bear } dingos;

typedef enum { janette, laura, amanda } cranberry;

typedef float same1;

typedef float same2;

int main (void);

int main (void)

{

  /* Compatible types.  */

  if (!(__builtin_types_compatible_p (int, const int)

        && __builtin_types_compatible_p (typeof (hot), int)

        && __builtin_types_compatible_p (typeof (hot), typeof (laura))

        && __builtin_types_compatible_p (int[5], int[])

        && __builtin_types_compatible_p (same1, same2)))

    abort ();

  /* Incompatible types.  */

  if (__builtin_types_compatible_p (char *, int)

      || __builtin_types_compatible_p (char *, const char *)

      || __builtin_types_compatible_p (long double, double)

      || __builtin_types_compatible_p (typeof (i), typeof (d))

      || __builtin_types_compatible_p (typeof (dingos), typeof (cranberry))

      || __builtin_types_compatible_p (char, int)

      || __builtin_types_compatible_p (char *, char **))

    abort ();

  exit (0);

}