struct u1
{
char field1;
short field2;
int field3;
};
typedef struct p1 {
char field1;
short field2;
int field3;
} __attribute__ ((packed)) p1_t1;
typedef struct __attribute__ ((packed)) p2 {
char field1;
short field2;
int field3;
} p2_t1;
int ary1[sizeof (struct p1) == sizeof (p1_t1) ? 1 : -1];
int ary2[sizeof (struct p2) == sizeof (p2_t1) ? 1 : -1];
int ary3[sizeof (struct p1) == sizeof (struct p2) ? 1 : -1];
typedef struct u1 __attribute__ ((packed)) u1_t1;
typedef struct u1 u1_t2 __attribute__ ((packed));
typedef struct p3 {
char field1;
short field2;
int field3;
} p3_t1 __attribute__ ((packed));