The SAS/C example is evidence that at least *some* incarnation of a C++ shared library is possible on Amiga. SAS/C won't be able to compile wxWidgets, but I'm perfectly open to modifying gcc/g++ if needed. I'm also thinking that C++ shared libraries works with DLL's on Windows. Without knowing in detail exactly how it's done for DLL's, in my experience regular DLL's have mostly similar functionality to Amiga resident libraries. Or is there any critical feature of DLL's that is missing from Amiga resident libraries?
I'm not sure that you can derive from a C++ class in Windows DLL's either, that is what COM is for. COM standardises on what the vtable's look like and how to cast from one object type to another. I would guess that the AOS4 libraries are similar to COM.
There is no reason at all why it can't be done on AOS3, but you'll need to add compiler support & then you will be limited to that one compiler (but I guess you have that problem on AOS4 too). I don't know how SAS/C does it and whether it's worth copying their method or not.
