I thought someone would come up with such an API layer, but by using GNUstep. https://en.wikipedia.org/wiki/GNUstep https://en.wikipedia.org/wiki/GNUstep This

I thought someone would come up with such an API layer, but by using GNUstep. https://en.wikipedia.org/wiki/GNUstep https://en.wikipedia.org/wiki/GNUstep This reads like it is similar to how WineHQ and ReactOS works. (Edit: it's mentioned in the related works section)