How can i build python3 without optimization?

[gmspro]

I tried this:
CFLAG=-g ./configure --prefix=/home/user/localdir

But during debugging python i get:

(gdb)next
(gdb)print variable
(gdb)$1 = <value optimized out>

What should i do?
How can i get the value of a variable instead of <value optimized out> ?

Thanks.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20120617/6d95ecff/attachment.html>