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Date:      Fri, 9 Dec 2011 17:37:23 +0400
From:      Ruslan Ermilov <ru@FreeBSD.org>
To:        Erik Cederstrand <erik@cederstrand.dk>
Cc:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: Deterministic builds
Message-ID:  <20111209133722.GC91429@lo0.su>
In-Reply-To: <F813133F-485D-4612-A695-42206E44B28A@cederstrand.dk>
References:  <F813133F-485D-4612-A695-42206E44B28A@cederstrand.dk>

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On Fri, Dec 09, 2011 at 12:16:39PM +0100, Erik Cederstrand wrote:
> I've been working on a project to make it possible to produce deterministic
> builds with FreeBSD. By this I mean building a FreeBSD distribution twice
> from the same code base and having all files in the two distributions match
> by md5 sum. Currently, this is not the case.
[...]
> I'd be very grateful for any comments on the approach and the patch.

The idea is not new.  Setting CROSS_BUILD_TESTING during the buildworld
addressed similar issues at a time I wrote it, to compare cross builds
to native ones, with several exceptions.  I haven't tested it for years,
so things might have changed, but it's still a good idea to give it a
try.



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