Yeah, the OMEMO related modules were not included in that build iirc. You could either try smack version 4.3.2 or clone the smack repository yourselves and build them.
I’ll try to update the HomeMadeOMEMO repository with the latest Smack version though
Thanks Paul. I managed to make the sample run. Though, to my disappointment I discovered that Smack Omemo is GPLv3 = impossible to use in close-code project