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

Previous Next

Full log

View this message in rfc822 format

From: Eric Dorland <eric <at> kuroneko.ca>
To: Mathieu Lirzin <mthl <at> gnu.org>
Cc: Reiner Herrmann <reiner <at> reiner-h.de>, reproducible-builds <at> lists.alioth.debian.org, bug#20314 <20314 <at> debbugs.gnu.org>, automake-patches <at> gnu.org
Subject: bug#20314: [PATCH] Make output of mdate-sh deterministic
Date: Sat, 16 Sep 2017 21:57:28 -0400

[Message part 1 (text/plain, inline)]

This is a good change but it's not enough unfortunately to make it
reproducible.  mdate-sh also needs to support SOURCE_DATE_EPOCH. I'm
working on a patch for that.

* Mathieu Lirzin (mthl <at> gnu.org) wrote:
> Hello,
> 
> Reiner Herrmann <reiner <at> reiner-h.de> writes:
> 
> > mdate-sh pretty-prints the modification time of a file.
> > But it's output can vary depending on the timezone of
> > the caller. Someone in timezone GMT-12 will get a different
> > result (day) than someone in timezone GMT+12.
> >
> > As this output is also used to create/update stamp files,
> > which influence the further build process, the build result
> > can vary.
> > To enable reproducible builds and to have a more deterministic
> > build behavior, this change fixes the timezone to UTC.
> >
> > Signed-off-by: Reiner Herrmann <reiner <at> reiner-h.de>
> > ---
> >  lib/mdate-sh | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> >
> 
> Applied with slight modifications in commit
> 7c25c996d1c7c212a5981aa0e9c4434b6f33f7b8
> 
> Thanks.
> 

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

[signature.asc (application/pgp-signature, inline)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.