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[bug#49517] [PATCH] gnu: txr: Build documentation and update to 265.

From: Guillaume Le Vaillant
Subject: [bug#49517] [PATCH] gnu: txr: Build documentation and update to 265.
Date: Mon, 19 Jul 2021 12:08:19 +0000

Paul A. Patience <> skribis:

> On Sunday, July 18th, 2021 at 16:27, Kaz Kylheku <> wrote:
>> Either Ubuntu has a different upstream for these tools, or else they
>> have some patches (which would be worth stealing instead of repeating
>> the work).
>> Moreover, if Ubuntu has patches for this, it might be getting them from
>> Debian.
> I know Debian is making great efforts to obtain reproducible builds [1],
> and in fact if you look at the first message of the bug report I
> previously linked [2], they mention that they have been using some
> custom patches to get Ghostscript to produce reproducible output
> (on Debian).
> In fact, we can find some information about Debian's Ghostscript patch
> here [3], though unfortunately the link to the patch is dead.
> (There is also more information about reproducible builds here [4].)
> Best regards,
> Paul
> [1]:
> [2]:
> [3]:
> [4]:

So Debian indeed has a patch adding the possibility to set the timestamp
based on SOURCE_DATE_EPOCH (see '2010_add_build_timestamp_setting.patch'
in [1] for example).

Guix also has a patch, but a different one based on GS_GENERATE_UUIDS.
However this patch is missing a part disabling two of the timestamps.
I proposed a patch to fix that (see [2]).
With this fix, '' is not necessary anymore to build
the documentation reproducibly in Guix, but it might still be useful for
some other build environments.


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