gcc/testsuite/gcc.dg/attr-ms_struct-packed1.c

   1 /* Test for MS structure with packed attribute.  */
   2 /* { dg-do run { target *-*-interix* *-*-mingw* *-*-cygwin* i?86-*-darwin* } }
   3 /* { dg-options "-std=gnu99" } */
   4
   5 extern void abort ();
   6
   7 union u
   8 {
   9   int a;
  10 } __attribute__((__ms_struct__, __packed__));
  11
  12 struct s
  13 {
  14   char c;
  15   union u u;
  16 };
  17
  18 int
  19 main (void)
  20 {
  21   if (sizeof (struct s) != (sizeof (char) + sizeof (union u)))
  22     abort ();
  23
  24   return 0;
  25 }