R devel - Nov 2001 - modification time warning with R CMD check

I often get warnings like the following when running R CMD check

[...]
* checking for code/documentation mismatches ... OK
* checking tests ...
make: *** Warning: File `Makevars' has modification time in the future
(2001-11-13 12:54:37.381546042 > 2001-11-13 12:54:37.314975985)
[...]

I am ready to believe that this is not a bug (i.e., that the timing on my
various machines and file systems is such that I am creating a Makevars with a
modification that is 0.07 seconds in the future from the perspective of the
machine that Perl is running on). However, I would think that a
warning would only be justified if this were far enough (1 second? 5 seconds?)
in the future to be "interesting".

I am running 1.3.1 on Solaris

mica|tmp> R --version
R 1.3.1 (2001-08-31).
Copyright (C) 2001 R Development Core Team

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under the terms of the GNU
General Public License.  For more information about these matters,
see http://www.gnu.org/copyleft/gpl.html.


Thanks,

Dave Kane

-- 
David Kane
Geode Capital Management
617-563-0122
david.d.kane@fmr.com
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On Tue, 13 Nov 2001, David Kane  <David Kane wrote:
> I often get warnings like the following when running R CMD check
>
> [...]
> * checking for code/documentation mismatches ... OK
> * checking tests ...
> make: *** Warning: File `Makevars' has modification time in the future
(2001-11-13 12:54:37.381546042 > 2001-11-13 12:54:37.314975985)
> [...]
>
> I am ready to believe that this is not a bug (i.e., that the timing on my
> various machines and file systems is such that I am creating a Makevars
with a
> modification that is 0.07 seconds in the future from the perspective of the
> machine that Perl is running on). However, I would think that a
> warning would only be justified if this were far enough (1 second? 5
seconds?)
> in the future to be "interesting".
I get this too from time to time.  It's actually hard to tell what is
'uninteresting' in general. For example, Linux can create a file in
about
50 microseconds on suitable hardware, so a 0.07s lag is easily enough that
files might in principle have been created in the wrong order, messing up
the make algorithm.

Fortunately in building R this sort of lag doesn't matter.
Unfortunately I don't know how to turn the warning off.

	-thomas

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