How to pack the following struct in x86?

[yinliyin@zte.com.cn]

Hi all,
  Is there any method in gcc that could pack the structs followed? Just
like in VC. (Target is intel x86)

#pragma pack(1)

typedef struct tagTPackStruct
{
  int  i;
  char ch;
  int  ii;
} TPackStruct;

/* other pack struct */
......

#pragma pack()

typedef struct tagTPackStruct
{
  int  i;
  char ch;
  int  ii;
} TNoPackStruct;

/* Other no pack struct */
......