GNU bug report logs - #70663
nss@3.99 is really hard to build

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From: Christopher Baines <mail <at> cbaines.net>
To: 70663 <at> debbugs.gnu.org
Subject: bug#70663: nss <at> 3.99 is really hard to build
Date: Wed, 01 May 2024 11:11:31 +0100

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Christopher Baines <mail <at> cbaines.net> writes:

> nss <at> 3.99 is really hard to build, it's so hard and so important that
> data.guix.gnu.org is still after two days trying to process [1]. I say
> so important because you have to build nss <at> 3.99 to compute the channel
> instance derivations for Guix.
>
> 1: https://data.guix.gnu.org/revision/72308f262c910977e40c2c9f350dc563c0a8437a
>
> Looking at the next revision which has been processed [2], it's been
> built on riscv64-linux as the testsuite is disabled, and it has also
> built on aarch64-linux, but there's no successful build for any other
> architecture.
>
> 2: https://data.guix.gnu.org/revision/9f183c3627a006e8fd3bb9708448bc05a6204e6d/package/nss/3.99.0?locale=en_US.UTF-8
>
> I think there's two issues here, was this spotted before merging, and
> what if anything can be done about this now. Where there's not a
> substitute available for nss <at> 3.99, this will affect guix pull/guix
> time-machine, e.g.
>
>   → guix time-machine --commit=72308f262c910977e40c2c9f350dc563c0a8437a -- describe
>   Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
>   substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
>   substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
>   substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
>    nss-3.99.tar.xz  55.2MiB                                                                                             13.7MiB/s 00:04 ▕██████████████████▏ 100.0%
>   building /gnu/store/8379qa0y6s7ssjr8gplm5fyw9r5pnxhn-nss-3.99.0.drv...

Looking at the build failures for x86_64-linux, it seems that there's
just one test failure. There's a threshold of less than 5 seconds, and
it takes 5 to 7 seconds to complete. This probably isn't helped by using
faketime.

Here's an upstream bug [3] where they raised the threshold a bit, but
this isn't enough for our use case.

3: https://bugzilla.mozilla.org/show_bug.cgi?id=1835357

I've sent a patch here which increases the threshold by a lot:

  https://issues.guix.gnu.org/70693

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