Want to add IP options into IP header, unable to resolve symbol

Hi,

I want to use the function defined in in net/ip_options.c file like
ip_options_compile, ip_options_build in my netfilter module. I want to put
options into IP packet header. I have inserted the header file that
declares these function. I have used EXPORT_SYMBOL, but I get warning,
"ip_options_compile" undefined. Any suggestions will be greatly respected.
I am using Ubuntu 11.10. uname -a: 3.0.0-16-generic. Is there a way to make
this symbol visible for newer kernel?

-Jeewan