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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH 0/2] Avoiding incompatible locale data in LOCPATH
Date: Mon, 05 Oct 2015 16:35:20 +0200
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In-Reply-To: <87fv1qvag8.fsf@netris.org> (Mark H. Weaver's message of "Sun, 04
	Oct 2015 12:56:55 -0400")
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To: Mark H Weaver <mhw@netris.org>
Cc: guix-devel@gnu.org, beffa@ieee.org

Mark H Weaver <mhw@netris.org> skribis:

> ludo@gnu.org (Ludovic Court=C3=A8s) writes:
>
>> So with current =E2=80=98core-updates=E2=80=99, someone on a =E2=80=9Cfo=
reign distro=E2=80=9D needs to
>> do:
>>
>>   guix package -i glibc-locales
>>   export GUIX_LOCPATH=3D$HOME/.guix-profile/lib/locale/2.22
>>
>> Note the extra =E2=80=9C/2.22=E2=80=9D, which comes from commit f2d7bbb.=
  This is a bit
>> of an annoyance for end users, but the point is that eventually this
>> would allow us to recommend things like:
>>
>>   export GUIX_LOCPATH=3D$HOME/.guix-profile/lib/locale/2.22:$HOME/.guix-=
profile/lib/locale/2.23
>>
>> The only question is whether having the =E2=80=9C/2.22=E2=80=9D prefix b=
y default is a
>> good idea.  Opinions?
>
> I think the "/2.22" suffix will be needed to prevent another awkward
> transition the next time glibc makes an incompatible change to their
> locales.  Suppose that 2.23 makes another incompatible change.  After
> that, many Guix systems will have a mixture of software linked with
> glibc-2.22 and glibc-2.23.

Yes.  But we could just as well have =E2=80=98glibc-utf8-locales=E2=80=99 w=
here
everything is in lib/locale directly, and =E2=80=98glibc-transition-locales=
=E2=80=99
where things are under lib/locale/2.22 and lib/locale/2.23.  Dunno.

> One question: when this happens, do we have a mechanism for
> automatically setting GUIX_LOCPATH to:
>
>   $HOME/.guix-profile/lib/locale/2.22:$HOME/.guix-profile/lib/locale/2.23
>
> or will that have to be done manually?

Unless glibc is in the profile, that has to be done manually.

Ludo=E2=80=99.