can somebody help me out maybe?

I'd like to compile a simple c++ external for puredata. attatched is an example.

I can get it to compile, but can't seem to get it to link properly so that PD understands the symbols.

depending on how I link the .o objects (see makefile), I get either:

Symbol "counter_setup" not found or undefined Symbol Zwlh ....

thanks -august.