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Subject: |
[PATCH 0/1] Add configure flag to emacs to improve repoducibility |
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Date: |
Tue, 30 Apr 2019 22:28:04 +0100 |
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."
https://www.gnu.org/software/emacs/manual/html_node/elisp/Building-Emacs.html
There is also this mailing list post about emacs repoducibility:
https://lists.gnu.org/archive/html/emacs-devel/2016-11/msg00711.html
wednesday (1):
gnu: emacs: Make build more reproducible
gnu/packages/emacs.scm | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--
2.21.0
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--- Begin Message ---
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Subject: |
Re: [bug#35511] [PATCH 0/1] Add configure flag to emacs to improve repoducibility |
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Date: |
Tue, 21 May 2019 22:50:20 +0200 |
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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."
> https://www.gnu.org/software/emacs/manual/html_node/elisp/Building-Emacs.html
>
> There is also this mailing list post about emacs repoducibility:
> https://lists.gnu.org/archive/html/emacs-devel/2016-11/msg00711.html
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 \
--substitute-urls='https://mirror.hydra.gnu.org https://berlin.guix.gnu.org'
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!
Ludo’.
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