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bug#35511: [PATCH 0/1] Add configure flag to emacs to improve repoducibi

From: Ludovic Courtès
Subject: bug#35511: [PATCH 0/1] Add configure flag to emacs to improve repoducibility
Date: Tue, 21 May 2019 22:50:20 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux)

Hi wednesday,

wednesday <address@hidden> skribis:

> This patch adds the --disable-build-details configure-flag to the emacs 
> package.
> By default the emacs binary stores some information about how it was build, as
> stated here:
> "By default the dumped emacs executable records details such as the build 
> time and host name. Use the --disable-build-details option of configure to 
> suppress these details, so that building and installing Emacs twice from the 
> same sources is more likely to result in identical copies of Emacs."
> There is also this mailing list post about emacs repoducibility:

This is the right thing to do, applied!

I’m committing a followup that does the same for ‘emacs-minimal’ (even
though ‘emacs-minimal’ has 784 dependent packages, I’m committing to
‘master’ because most of these build in a few seconds.)

I’ve run:

  guix challenge emacs \

on a commit before this patch, and there’s the ‘.emacs-real’ binary
alongside a dozen of .elc files that differ.  So this may not be the end
of the road, but we should keep monitoring with ‘challenge’ and ‘--check’.

Thank you!


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