Q:  Is NeXT's Objective-C fully compatible with Stepstone 4.0?  Could someone purchase the Foundation Classes from Stepstone, and use them on a NeXT?

A:  Our Objective-C compiler is fully compatible with the Stepstone 4.0 language definition.  However, the runtime support and associated header files are slightly different.  All this means is that the Foundation Classes and associated `make' files may have to be modified slightly in order to compile.  When you purchase the Foundation Classes you get the source code , so there should not be any significant technical problems.

QA545

Valid for 1.0, 2.0, 3.0