In the legact ABI, superclass pointers are initially set to strings
containing the superclass name and the runtime fixes them up. In the
new ABI, the compiler sets up the linkage directly.
We're now using a new class and category structure and auto-upgrading the old ones. Other changes:
- The Ivar structure now points to the ivar offset variable, so we can more easily find it.
- Categories can now add properties.
David Chisnall
David Chisnall