GNU bug report logs - #20314
mdate-sh has undeterministic output

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Eric Dorland <eric <at> debian.org>
To: bug-automake <at> gnu.org
Cc: Reiner Herrmann <reiner <at> reiner-h.de>
Subject: Re: Bug#782345: automake: mdate-sh has undeterministic output
Date: Sun, 12 Apr 2015 14:50:09 -0400

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* Reiner Herrmann (reiner <at> reiner-h.de) wrote:
> Source: automake-1.14
> Version: 1:1.14.1-4
> Severity: wishlist
> User: reproducible-builds <at> lists.alioth.debian.org
> Usertags: toolchain
> Tags: upstream
> X-Debbugs-CC: reproducible-builds <at> lists.alioth.debian.org
> 
> Hi!
> 
> While working on Debian's “reproducible builds” effort [1], we have
> noticed that the output of mdate-sh (which is part of automake, and
> shipped by some upstream source tarballs) can produce different
> output depending on the timezone.
> Different output of mdate-sh can then lead to further differences
> in the build process [2].
> 
> We already forwarded a patch to automake-patches <at> gnu.org, but it
> hasn't appeared yet in their mailing list archive (which looks a little
> dead with no new mails since January).
> The patch [3] fixes the timezone used by mdate-sh to UTC, which will
> always produce the same output independent of the timezone of the caller.
> 
> Regards,
>  Reiner
> 
> [1]: https://wiki.debian.org/ReproducibleBuilds
> [2]: https://wiki.debian.org/ReproducibleBuilds/TimezoneVarianceBecauseOfAutomakeMdate
> [3]: https://lists.alioth.debian.org/pipermail/reproducible-builds/Week-of-Mon-20150406/001380.html
> 

-- 
Eric Dorland <eric <at> kuroneko.ca>
43CF 1228 F726 FD5B 474C  E962 C256 FBD5 0022 1E93

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