Author here. Replacing #include <sigc++/object.h>
with #include <sigc++/sigc++.h> in src/manipulator.hh solves the problem without changing the dependencies. I have pushed 1.44 to the github repository at http://github.com/kpeeters/cadabra . If anyone can bring this back to life, that would be much appreciated. Cheers, Kasper
