clarification for idl2wrs?

Hi, I have wireshark 1.2.7 loaded on my ubuntu virtualbox (Lucid) and was following the instructions for idl2wrs here: https://www.wireshark.org/docs/wsdg_html_chunked/ChDissectIdl2wrs.html

I was able to create a C file from the idl and was looking at the step where it says "Copy the resulting C code to subdirectory epan/dissectors/ inside your Wireshark source directory". When I did a "find" under /usr, it looks like this is under /usr/include/wireshark/epan/dissectors. Assuming this path is correct, I'm not seeing the Makefile.common under that directory, just the header files. Are the makefiles something that I need to download? Any help is much appreciated.