I have tried loading SmaCC using the SqueakMap Package Loader, and am 
getting the following error :-

    This package depends on the following classes:
        RBAbstractClass
    You must resolve these dependencies before you will be able to load 
these definitions:
        RBAbstractClass>>protocolsFor:

And am using a fresh Squeak3.7-5989 image.

Help,

Aaron