Hiding boost headers from MOC, but still error

[rawfool]

Thank you very much ChrisW67. I was including a header for the dll which I didn't know that it was using boost. Pushing that include into #ifndef Q_MOC solved the problem.

Does it compile cleanly? If so then the problem is elsewhere, ..

The code which you posted above compiled cleanly and your answer made me re look at the libraries & check if they are using boost.
Thank you very much.