How gdb6.3 describers OS ABI variants?

[ayang]

Hi,
   I found that the document gdbint isn't matching the gdb6.3 source.Is that true?How can I get the latest document?
Gdbint describers some OS ABI variants, such as GDB_OS_ABI,GDB_OSABI_LINUX...But I can't find them in osabi.h,even in the whole directory of gdb6.3.
I want know how gdb6.3 describers these OS ABI variants?

regards
thanks

　　　　　　　　ayang
　　　　　　　　mysea000@163.com
　　　　　　　　　　2005-11-02