I hadn't come across this. Insane (if true, I've never tried) that GnuStep is not 100% compatible, surely that would be the point.
How easy is it to port, say, a Leopard-era Objective C app to ObjFW?
I tried this with an old iOS only game a few years ago. It is clearly not a heavily used library, but it seemed to work ok
- There was a bug or two I had to patch, but the code is readable, so it wasn't a big deal
- OFString, etc aren't intended to be 1:1 replacements for NSString, etc. This wasn't a real problem. They mostly match, and all I needed to do was write a few categories
- The runtime functions are not compatible at all, but most projects wouldn't touch those
- CoreFoundation and the other C APIs are not there at all, so you'll need replacements
- It is a replacement for Foundation framework, not AppKit, so if it is a GUI app you still have a lot of work to do
loading story #47221840