1  /* { dg-do compile } */
       2  /* { dg-options "-std=gnu90 -Wc90-c99-compat" } */
       3  
       4  __extension__ _Bool b;
       5  __extension__ _Complex double c = __builtin_complex (0.0, 0.0);
       6  __extension__ long long l;
       7  __extension__ struct A { int i; char a[]; };
       8  __extension__ struct { long int b: 2; } s;
       9  __extension__ const const int i;
      10  __extension__ volatile volatile int v;
      11  __extension__ struct S { int a[2]; };
      12  extern struct S foo (void);
      13  __extension__ enum { E, };
      14  __extension__ void fn1 (char [*]);
      15  
      16  __extension__ void
      17  fn2 (char x[static 4])
      18  {
      19    int i = (int) { 1 };
      20    struct A a = { .i = 3 };
      21  }
      22  
      23  __extension__ void
      24  fn5 (void)
      25  {
      26    (foo ()).a[0];
      27  }
      28  
      29  __extension__ void fn7 (int n, int a[n]);