To re-issue the checks, use make prereq.
[label=error message with too old GNU make] $ make GNU make 3.80 too old. Please install GNU make 3.81 or higher to continue. You can override this check, see http://www.freewrt.de for details. It is suggested to upgrade your copy of bison to GNU Bison 2.3 because of its bug fixes. make: *** [.prereq_done] Error 1it is quite a nice error that tells you to use more up to date software, but we can anyhow give this hostsystem a try and tell make to ignore those errors/warnings running make prereq-noerror.