[bug#41167] Julia: fix current patches, upgrade to 1.4.1

[Nicolò Balzarotti]

Hi Simon!

zimoun <address@hidden> writes:

> Hi Nicolò,
>
> On Sun, 10 May 2020 at 10:08, Nicolò Balzarotti <address@hidden> wrote:
>
>> - fixed the julia-SOURCE_DATE_EPOCH-mtime.patch: It's now a meta-patch,
>>   that creates the right patch file, so the current julia version is not
>>   patched, and precompile cache of packages installed with guix is
>>   broken.  Still no julia-package is in guix, that's why it went
>>   unnoticed
>
> Does this fix the unreproducible behaviour of Julia? As described in
> this bug [1] and discussed at length for v1.3.

Unfortunately, not (actually not tested, but no changes were made from
1.4.0).  I've not received feedback on the long issue I opened [1], so I
think I'll propose one fix at a time hoping this way they'll eventually
merge them.

>
>> - Update julia to latest release, v1.4.1.  I was finally able to
>>   unbundle the last pieces of bundled software (libwhich).  Now julia
>>   is based on llvm-8 (previously on llvm-6) and I measuread a speedup of
>>   ~17x on precompile times
>
> Because my machine (of lockdown) is not enough powerful, I cannot
> rebuild Julia v1.4.1 with the option '--check'.
> Could you report the status on the reproducibility of Julia with this
> new version?
>
>
> BTW, thank you for this important update!
> Hope to play with it soon.
A new update that adds tests on julia packages and adding more packages
is coming.  Please, let me know if you have any package you use
day-by-day so that I can add them to verify everything works.

>
>
[1] https://github.com/JuliaLang/julia/issues/34753

> Cheers,
> simon
>
> ps:
> hope that your PhD defense was fine?
My Thesis has been accepted, but due to Covid-related emergency, my
defense has been planned for the last day of this month.

Thanks, Nicolò