gcc/testsuite/gcc.dg/array-4.c

   1 /* { dg-do run } */
   2 /* { dg-options "" } */
   3
   4 /* Verify that GCC's initialized flexible array member extension
   5    works properly.  */
   6
   7 extern void abort(void);
   8 extern void exit(int);
   9
  10 struct f { int w; int x[]; };
  11 struct g { int w; int x[0]; };
  12
  13 static struct f f = { 4, { 0, 1, 2, 3 } };
  14 static int junk1[] = { -1, -1, -1, -1 };
  15 static struct g g = { 4, { 0, 1, 2, 3 } }; /* { dg-warning "(excess elements)|(near initialization)" "" } */
  16 static int junk2[] = { -1, -1, -1, -1 };
  17
  18 int main()
  19 {
  20   int i;
  21   for (i = 0; i < f.w; ++i)
  22     if (f.x[i] != i)
  23       abort ();
  24   exit(0);
  25 }