Decoding a symbol generated by g++

[sheikashrub]

Does any one know of a better way to decode the symbol generated by the
g++ 3.4.2 after it compiles a code? I see a symbol being undefined when
I link it. But not sure how to map that to the actual line in code.
Essentially I need to know how to decode the symbol and map it to a
line in C++.

Thanks,
Sheik.