ref: 9bd7deeee3fa7b5c36fca2bb45349fe38847f8ab
dir: /lib/thread/spawn+openbsd.myr/
use std pkg thread = type tid = uint64 const spawn : (fn : (-> void) -> std.result(tid, byte[:])) ;; const spawn = {fn; std.die("threads not supported yet on openbsd\n") -> `std.Fail "not supported" }