C++Builder 2010结构体不能再字节对齐？？？？？

[STM8L103]

#pragma packet(push,1)
typedef struct
{
  unsigned char   A;
  unsigned char   B;
  unsigned char   C;
  unsigned short  D;
  unsigned short  E;
  unsigned char   F;
  unsigned short  G;
}my_struct;
#pragma packet(pop)

      int size;
      size=sizeof(my_struct);

本来以为用#pragma packet(push,1)可以使结构体按字节对齐，

今天调试程序总是出错，发现问题在把数组首地址传递给结构体指针后，
结构体元素的数据总是出错。

结构体中的元素并不是在字节排列的，中间有缝隙，导致数据访问错位。

[ccrun.com]

#pragma pack(1)
typedef struct
{
  unsigned char   A;
  unsigned char   B;
  unsigned char   C;
  unsigned short  D;
  unsigned short  E;
  unsigned char   F;
  unsigned short  G;
}my_struct;
#pragma pack()

[STM8L103]

多谢。