message: fixed compile error on cygwin
diff: @@ -468,6 +468,7 @@ void php_swoole_server_before_start(swServer *serv, zval *zobject TSRMLS_DC)
  {
  add_assoc_long(zsetting, "max_connection", serv->max_connection);
  }
  +#ifdef HAVE_PTRACE
  //trace request
  if (serv->request_slowlog_file && (serv->trace_event_worker || SwooleG.task_worker_num > 0))
  {
  @@ -478,6 +479,7 @@ void php_swoole_server_before_start(swServer *serv, zval *zobject TSRMLS_DC)
  return;
  }
  }
  +#endif
  int i;
  zval *retval = NULL;
  