bug#23776: Perl's .pod files include timestamps, making Perl package builds non-deterministic

[Ludovic Courtès]

Leo Famulari <address@hidden> skribis:

> On Thu, Jun 16, 2016 at 01:33:46PM +0200, Ludovic Courtès wrote:
>> The problem is described in 
>> <git://git.debian.org/git/reproducible/notes.git>:
>> 
>> --8<---------------cut here---------------start------------->8---
>> timestamps_in_documentation_generated_by_podman:
>>   description: |
>>     The module Pod::Man includes timestamps in its embedded manpages:
>>     
>> http://sources.debian.net/src/perl/latest/cpan/podlators/lib/Pod/Man.pm/?hl=1700#L977
>>     They should be based on the mtime of the original file.
>>   url: 
>> https://wiki.debian.org/ReproducibleBuilds/TimestampsInManpagesGeneratedByPodMan
>
> According to the information on this page, we should set POD_MAN_DATE
> while building. Should we make the perl-build-system export this
> variable? Set to SOURCE_DATE_EPOCH?

Yes, that sounds like a good idea.

Thanks,
Ludo’.