[Pharo-dev] Moving back and forth from 64 to 32 bit images - possible?

What is the story on moving back and forth on 32 and 64 bit images? I'd like to develop apps for my Raspberry Pi on my Mac - both will use native libraries but the Mac is full of 64 bit system libraries and the Pi is full of 32 bit libraries and I don't want to have to run around building 32 bit copies of the libraries I already have on my Mac. Is this possible to achieve?