GNU bug report logs - #79170
Please make amhello-1.0.tar.gz reproducible

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

From: Jelle van der Waa <jelle <at> vdwaa.nl>
To: bug-automake <at> gnu.org
Subject: Please make amhello-1.0.tar.gz reproducible
Date: Mon, 4 Aug 2025 17:15:42 +0200

In Arch Linux our automake package includes 
/usr/share/doc/automake/amhello-1.0.tar.gz. When we rebuild this package 
using our rebuilder to check for reproduciblity the uid/gid and 
timestamps are not normalized meaning they vary per rebuild making the 
package non-reproducible. [1] [2]

The owner/guid could be set --owner=root:0 --group=root:0
 and to get rid of the timestamp --mtime='@0' (Or alternatively a fixed 
timestamp which can be set via SOURCE_DATE_EPOCH).

Alternatively the timestamp could be excluded by hardcoding the tar 
format to ustar which omits timestamps.

[1] https://reproducible.archlinux.org
[2] https://reproducible-builds.org/

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