Custom Dissector using an external library

I have built a dissector in the windows os and everything works as planned. I have converted the dissector and the associated libraries to build on RHEL6. I have got it to the point where Wireshark is built and the plugin and everything else is built. When I run Wireshark I get the error message that it "Couldn't load module /usr/local/lib/wireshark/plugins/1.11.2/mypluginname: undefined symbol functionname". The function that is in the error is in an external .so that I have built. I have checked the .so with the "nm -D" command and the function is in there. Where does Wireshark look for the external .so? Is it specified in one of the makefiles or what?

Thanks in advance