From owner-freebsd-bugs  Wed Jan 30 18:38:45 2002
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Date: Wed, 30 Jan 2002 20:38:39 -0600
Subject: Re: conf/6346: Kernel version strings need to relate to the source not the build
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Cc: joe@tao.org.uk, sheldonh@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG,
	bde@zeta.org.au
To: "."@babolo.ru
From: Richard Wackerbarth <rkw@dataplex.net>
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On Wednesday, January 30, 2002, at 06:26 PM, "."@babolo.ru wrote:

> Richard Wackerbarth writes:
>>
>> I think we could actually do it just once (at the time that we update
>> from the cvs?) and cache that result.
>> That would get rid of at least a part of the delay.
>>
>> It can also be done by playing games on a special file in the master 
>> cvs
>> archive (but not the copies thereof)
> Exactly.
> What about do
> date +'#define LAST_MOD "%Y-%m-%d %H:%M:%S"' > /path/last_mod_date.h
> on any CVS tree update?
> And #include <last_mod_date.h>

That won't work. It produces the time of the cvs checkout/update and not 
the time of the source modification.
That is little better than the time of the compile that we have now.

You need to modify the file as a part of the cvs commit process. The RCS 
keyword $Date$ or equivalently one of the $Id$ variants such as 
$FreeBSD$ gets the time associated with file modification rather than 
file retrieval. Joe's method is functionally correct. We are now looking 
for a more efficient method to accomplish the same thing.


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