gcc/testsuite/gcc.dg/pragma-align.c

   1 /* Prove that HANDLE_SYSTEMV_PRAGMA alignment handling works somewhat. */
   2
   3 /* { dg-do compile { target i?86-*-linux* i?86-*-*bsd* i?86-*-sco3.2v5* } } */
   4
   5 struct {
   6         char one;
   7         long two;
   8 } defaultalign;
   9
  10 #pragma pack(4)
  11 struct {
  12         char one;
  13         long two;
  14 } sixteen;
  15
  16 #pragma pack(1)
  17 struct {
  18         char one;
  19         long two;
  20 } two;
  21
  22 #pragma pack(2)
  23 struct {
  24         char one;
  25         long two;
  26 } three;
  27
  28 #pragma pack()
  29 struct {
  30         char one;
  31         long two;
  32 } resetalign;
  33
  34 main()
  35 {
  36         if(sizeof(sixteen) < sizeof(defaultalign)) abort();
  37         if(sizeof(two) >= sizeof(defaultalign)) abort();
  38         if(sizeof(three) <= sizeof(two)) abort();
  39         if(sizeof(resetalign) != sizeof(defaultalign)) abort();
  40         return 0;
  41 }
  42