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Re: [avr-gcc-list] clock skew detected

From: Erik Christiansen
Subject: Re: [avr-gcc-list] clock skew detected
Date: Tue, 30 Sep 2003 13:06:30 +1000
User-agent: Mutt/1.3.28i

On Tue, Sep 30, 2003 at 11:01:40AM +1000, Jack Valmadre wrote:
> I've just switched from using AVRStudio with AVRGCC 2.3 to using
> Programmers Notepad with WinAVR. When I compile the project,
> everything works fine except at the end I get a line saying: make: ***
> Warning: Clock skew detected.  Your build may be incomplete. Is this a
> problem? How can I fix it?

   Clock skew can be detected on networked development machines, if
sharing build files between hosts, and the (time & date) clocks are not
synchronised. When the compiling host lags the fileserver, the generated
files are "older" than their inputs, which is a logical impossibility.
This makes make's decision making problematical, hence the warning.

   When this last happened here, a few years back, I synchronised date &
time, effecting an immediate cure.

   It is not easy to imagine a way for this to happen on a single host,
without something being seriously broken. (Perhaps my lack of experience
with anything but various unices limits my imagination, though. :-)


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