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[bug#30831] [PATCH] gnu: rust: Update rust from 1.22.1 release to 1.24.1

From: Marius Bakke
Subject: [bug#30831] [PATCH] gnu: rust: Update rust from 1.22.1 release to 1.24.1
Date: Tue, 27 Mar 2018 20:08:01 +0200
User-agent: Notmuch/0.26 ( Emacs/25.3.1 (x86_64-pc-linux-gnu)

Danny Milosavljevic <address@hidden> writes:

> Hi Nikolai,
> I think the incremental (first) version is the best one since you can see
> which bugs are worked around by us and which are fixed per release at a 
> glance.
> But really it doesn't matter much which.
>> Second solution looks too verbose for me, but with first solution on
>> long chain of versions it will be very hard to manage which changes we
>> have in newest package.
> I hope we won't have a long chain of cumulative Rust versions in Guix.  I know
> that Rust upstream likes to do this chain of Rust1 -> Rust2 -> Rust3 -> Rust4
> but that's not really scalable - especially since even one Rust takes a day
> to compile.  We should try to get mrust [1] to work and use it to compile just
> the newest Rust.  If it doesn't work we can still fall back to one of the
> other ways later.
> (What Mozilla recommends is we compile Rust1, use Rust2 to compile Rust3, use
> Rust3 to compile Rust4, likewise for each new release)

I think we should heed upstreams advice in that case.  A long bootstrap
chain is really only a problem during 'core-updates', no?

IIUC mrustc only targets x86_64 currently, so I don't expect it to
become viable for Guix in a good while.

> [1]

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