i haven't checked the repository, but this sounds like a *typical* case 
of object-files in the respository.

the quick fix is to just run "make clean" before running "make".


the real fix is, that Julian should remove *all* files that are 
generated by a compiler (*.o, *.pd_darwin).


And the real real fix is the repo should adapt the .gitginore file in the pd-lib-builder's hello world example repo so this files are not tracked in the first place.
--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com