Hmm, just a question, and due sue me for not knowing *nix that good, but why not just grep for the string _ov_open_callbacks in the headers and then cross references with the source to see which ones are left out.
You probably know how to, but if my memory serves me correct it will be something in the line of:
grep -i _ov_open_callbacks *.h
Might have to put a ' on the sides of _ov_open_callbacks.
Then again I might be completely wrong. In any case just a thought

Kind regards,
MalloC