Re: Building Guile with ‘-j1’?

[Jan Nieuwenhuizen <janneke@gnu.org>]

Ludovic Courtès writes:

Hello,

> As the saying goes, “the cobbler’s children go barefoot”.  Guile/Guix
> are no exception since Guile builds are non-reproducible, despite work
> done a few years ago:
>
>   https://issues.guix.gnu.org/20272

Ugh.  Thanks for bringing this up again.  Would you consider disabling
parallel builds in Guile by default, adding something like a
"--enable-somewhat-faster-non-reproducible-build" configure option until
this is fixed?

> Until it’s fixed in Guile proper, what do you think of building Guile
> 2.0/2.2/3.0 with #:parallel-build? #f ?  We could do that in
> ‘core-updates’ now.
>
> That would work around the problem for Guile itself.  It would increase
> build times, but probably not that much since the most expensive part
> (compiling the first few files) is sequential anyway.  IIRC this is what
> Vagrant did for the Debian packages.

Yes, I would support at least doing this.  

> We could also disable parallel builds in ‘guile-build-system’.  It’s
> only used for small packages so the extra build time is probably OK.

Are packages using guile-build-system expected to build non-reproducible
too?  In that case, I would certainly support doing it there.

Greetings,
Janneke

-- 
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
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