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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: Sun, 04 Oct 2015 00:20:26 +0200
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In-Reply-To: <87eghdcivt.fsf@gnu.org> ("Ludovic
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To: Mark H Weaver <mhw@netris.org>
Cc: guix-devel@gnu.org, beffa@ieee.org

After a lot more thought, I changed my mind.

I realized that with the patch at
<https://sourceware.org/ml/libc-alpha/2015-09/msg00575.html>, it=E2=80=99s =
OK to
have, say,

  LOCPATH=3D$HOME/.guix-profile/lib/locale/2.22:$HOME/.guix-profile/lib/loc=
ale/2.23

That way, programs will pick locale data that is compatible; so a 2.23
program might pick most of its locale data from the /2.22 directory (if
they are compatible), and some of them from /2.23 (if the format has
changed.)

We still need =E2=80=98GUIX_LOCPATH=E2=80=99 to avoid the assertion failure=
 with older
libcs, only without the complicated semantics discussed yesterday.

The result is in =E2=80=98core-updates=E2=80=99:

  b6ac545 * gnu: commencement: Remove the tricky locale compatibility handl=
ing.
  f2d7bbb * gnu: glibc: Look for locale data in versioned sub-directories.
  fbb909a * gnu: glibc: Honor 'GUIX_LOCPATH'.

Ludo=E2=80=99.