Why can&#x27;t they just compile the swift core library into the executable? I imagine some things are architecture specific, like launching new threads (iOS calls down to objectiveC code which then handles the system call,etc). I imagine the problem is that you can&#x27;t compile just the non architecture specific parts. Unless you wrote some code to strip out those parts...hmm is that possible?<p>Also, how come it doesn&#x27;t look like they had to provide the path to the runtime? Built into the compiler I guess?