One way to accomplish this is only to extend copyright to revealed code, not to executables by themselves - this is consistent with the fundamental aim of IP, w

One way to accomplish this is only to extend copyright to revealed code, not to executables by themselves - this is consistent with the fundamental aim of IP, which is to eventually leave behind useful public goods (as opposed to, say, very long-lived trade secrets or opaque devices that can't be easily replicated - you don't get a patent if you haven't revealed how others can make your device.)