From: Kei Kebreau <kei@openmailbox.org>
To: Marius Bakke <mbakke@fastmail.com>
Cc: guix-devel@gnu.org
Subject: Re: [PATCH] gnu: maxima: Update to 5.39.0.
Date: Sun, 18 Dec 2016 12:59:33 -0500 [thread overview]
Message-ID: <87shpl2k56.fsf@openmailbox.org> (raw)
In-Reply-To: <87k2axnt21.fsf@kirby.i-did-not-set--mail-host-address--so-tickle-me> (Marius Bakke's message of "Sun, 18 Dec 2016 16:41:26 +0100")
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Marius Bakke <mbakke@fastmail.com> writes:
> Kei Kebreau <kei@openmailbox.org> writes:
>
>> This was supposed to be a simple version bump for Maxima, but it has
>> come to my attention that Maxima hasn't built reproducibily for quite a
>> while now (since version 5.36.1 according to my tests, possibly
>> further). Is there any particular reason why? I can't seem to pinpoint
>> the cause.
>
> The patch looks good. Are you sure it was reproducible before?
>
That's the thing; I'm not sure! I'll being investigating, though.
> I've found 'diffoscope' to be useful when troubleshooting
> reproducibility problems. E.g. by running it on two cancelled builds, or
> by installing to different output paths with a superficial change to the
> expression. It will show sections that differs which may aid locating
> the offending code.
>
Yes. I see that diffoscope complains about missing 'xxd'. That may be
useful to package (unless we already have it and I'm just oblivious).
> For C family programs, a "hail mary" grep for __DATE__ or __TIME__ can
> be enough. Tobias suggested making those return a fixed value, which I
> think could be worthwhile, at least for the build environment.
Cool. I'll remember this tip.
Patch pushed as 4a652c78d425bfd76c2baba510ecd255b22b4714.
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next prev parent reply other threads:[~2016-12-18 17:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-17 21:09 [PATCH] gnu: maxima: Update to 5.39.0 Kei Kebreau
2016-12-18 15:41 ` Marius Bakke
2016-12-18 17:59 ` Kei Kebreau [this message]
2016-12-18 18:34 ` Marius Bakke
2016-12-18 19:10 ` Leo Famulari
2016-12-18 18:35 ` Leo Famulari
2016-12-19 4:50 ` Kei Kebreau
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