linux-kernel - Re: [PATCH] override build timestamp

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Message-ID: <20070218081243.GA25618@aepfle.de>
Date:	Sun, 18 Feb 2007 09:12:43 +0100
From:	Olaf Hering <olaf@...fle.de>
To:	Roman Zippel <zippel@...ux-m68k.org>
Cc:	Andrew Morton <akpm@...l.org>, Sam Ravnborg <sam@...nborg.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] override build timestamp

On Sun, Feb 18, Roman Zippel wrote:

> Hi,
> 
> On Fri, 16 Feb 2007, Olaf Hering wrote:
> 
> > Pass a timestamp to kbuild via an enviroment variable.
> > 
> >     TZ=UTC BUILD_TIMESTAMP=2007-01-01 make -kj O=../O vmlinux
> > 
> > This can be used when the kernel source is in a SCM and uname -v
> > is supposed to give the commit date and not the package build time.
> 
> Is this really necessary? I don't really see the point of this.

The package/kernel buildtime does not mean much, but the commit date
gives you a way to restore the source state for a given binary.
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