gcc/testsuite/gcc.dg/pack-test-3.c

   1 /* { dg-do compile } */
   2
   3 /* Copyright (C) 2003 Free Software Foundation, Inc.
   4    Contributed by Nathan Sidwell 15 Jul 2003 <nathan@codesourcery.com> */
   5
   6 /* you should not be able to pack a typedef to a struct, only the
   7    underlying struct can be packed.  */
   8
   9 /* ok */
  10 struct u1
  11 {
  12   char field1;
  13   short field2;
  14   int field3;
  15 };
  16
  17 /* ok */
  18 typedef struct p1 {
  19    char  field1;
  20    short field2;
  21    int field3;
  22 } __attribute__ ((packed)) p1_t1;
  23
  24 /* ok */
  25 typedef struct __attribute__ ((packed)) p2 {
  26    char  field1;
  27    short field2;
  28    int field3;
  29 } p2_t1;
  30
  31 int ary1[sizeof (struct p1) == sizeof (p1_t1) ? 1 : -1];
  32 int ary2[sizeof (struct p2) == sizeof (p2_t1) ? 1 : -1];
  33 int ary3[sizeof (struct p1) == sizeof (struct p2) ? 1 : -1];
  34
  35 /* not ok */
  36 typedef struct u1 __attribute__ ((packed)) u1_t1; /* { dg-warning "attribute ignored" }*/
  37 typedef struct u1 u1_t2 __attribute__ ((packed)); /* { dg-warning "attribute ignored" }*/
  38
  39 typedef struct p3 {
  40    char  field1;
  41    short field2;
  42    int field3;
  43 } p3_t1 __attribute__ ((packed)); /* { dg-warning "attribute ignored" }*/
  44