ref: c08505fb46fd8cdfee6b6f425709e5bc536f6a75
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" }