Re: Reproducible builds and SoX

[Chris Bagwell <chris@cnpbagwell.com>]

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I've come to not like compile time timestamp showing up in output as well.
Complicates CI tests checking for behavior regressions, defeats rsync's
--hard-link option if one uses that to keep backups of past CI builds, etc.

In short term and to prevent breaking our ABI, I suggest changing that
field to be NULL in both git and patch against debian.  sox.c looks for
NULL and handles gracefully.

In longer term, I think a better plan is to output something like 'gcc -v'
outputs; the exact list of options pasted to configure script. That, I
think, is main intent of these timestamps; simple way to help detect 2
binaries reporting same version # but compiled with different
options/behavior.

Chris


On Fri, Feb 13, 2015 at 12:06 PM, Pascal Giard <evilynux@gmail.com> wrote:

> Hi guys,
>   Some work in Debian is pushing toward reproducible builds [1] and
> that work is advancing quite well. At the moment, 83%+ of the whole
> archive passes.
>
> SoX isn't one of those packages though as it uses timestamps macros
> [2]. These timestamps macros are only use to tell users/coders about
> the date/time at which SoX or libsox were built.
>
> It is suggested/recommended that the use of such macros be dropped
> altogether [3]. While I haven't received any pressure to make a move
> yet, I'm sure that'll come sooner than later.
>
> I'm therefore asking for your opinion on this. Do you see a problem in
> removing the use of those macros in SoX (thus removing that
> information from sox_version_info) ? I personally don't see that
> information bringing much to the table. My hunch is that it was added
> in the first place because others were doing it as well. I might be
> wrong tho.
>
> Thanks,
>
> -Pascal
> [1] https://wiki.debian.org/ReproducibleBuilds/About
> [2] https://reproducible.debian.net/rb-pkg/sox.html
> [3] https://wiki.debian.org/ReproducibleBuilds/TimestampsFromCPPMacros
> --
>

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