Most of the issues come from kernel differences. Some are relatively big, like epoll vs. kqueue, and some are very subtle (some syscalls have subtly different b

Most of the issues come from kernel differences. Some are relatively big, like epoll vs. kqueue, and some are very subtle (some syscalls have subtly different behavior on strange edge-case scenarios). I don't think building this natively would be too hard, but in the context of everything else left to do, it isn't an absolutely trivial project.