Emacs 24.3 gdb mode doesn't work on OSX 10.7.5

[Steven Wu <wus@qwest.net>]

hi,

I am having trouble to get Emacs gdb working correctly. When I do m-x gdb with argument --annonate=1 -i mi, I got this
==
Current directory is /Users/wus/src/vocoder/
GNU gdb 6.3.50-20050815 (Apple version gdb-1752) (Sat Jan 28 03:02:46 UTC 2012)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin"...
                                                     (gdb) 
help
List of classes of commands:

aliases -- Aliases of other commands
breakpoints -- Making program stop at certain points
data -- Examining data
files -- Specifying and examining files
internals -- Maintenance commands
obscure -- Obscure features
running -- Running the program
stack -- Examining the stack
status -- Status inquiries
support -- Support facilities
tracepoints -- Tracing of program execution without stopping the program
user-defined -- User-defined commands

Type "help" followed by a class name for a list of commands in that class.
Type "help" followed by command name for full documentation.
Command name abbreviations are allowed if unambiguous.
                                                                                                                    (gdb) 
time={wallclock="0.00022",user="0.00015",system="0.00008",start="1368149240.480793",end="1368149240.481009"}
==

See the (gdb) prompt is in the middle, and also, when  gdb-many-windows is set to t, I cannot get the Primary Source buffer to show program execution progress, and the other buffers, like the stack frame, register buffers etc show nothing. Gdb works with gud-gdb, does anyone know what the problem is?

Thanks

steve