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Re: Determinism issue

From: Ondra Pelech
Subject: Re: Determinism issue
Date: Sun, 20 Jul 2014 00:41:27 +0200

oh, great, thanks for the explanation!
regarding the fixed point, from your linked mail, I don't understand
what is already accomplished and what still has to be done to reach
fixed point.
so what is the status quo?
best regards

On Sat, Jul 19, 2014 at 3:52 PM, Ludovic Courtès <address@hidden> wrote:
> Hello,
> Roughly, there’s not much difference between what Guix and Nixpkgs
> provide in terms of build determinism, but this is clearly something
> we’re interested in.
> Guix may be slightly stricter in that chroot builds are the default, and
> it doesn’t rely on /bin/sh being in the chroot (unlike Nixpkgs.)
> You mention profile-guided optimizations.  This is *disabled* by default
> in GCC, AFAIK, so GCC is definitely deterministic.
> Another thing we do is build Binutils with
> --enable-deterministic-archives, which makes ‘ar’ archives with zeroed
> timestamps by default.
> For other examples of non-determinism issues, the Debian project has a
> nice summary: <>.
> Similarly, some time ago, I started looking a fixed-point builds, though
> I didn’t complete that:
> Thanks,
> Ludo’.

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