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From: Jan Nieuwenhuizen <janneke@gnu.org>
To: Mikael Djurfeldt <mikael@djurfeldt.com>
Cc: guix-devel@gnu.org, guile-devel <guile-devel@gnu.org>
Subject: Re: [PATCH] Append effective version to GUILE_LOAD[_COMPILED]_PATH
Date: Sat, 19 Mar 2016 10:26:08 +0100	[thread overview]
Message-ID: <874mc2yg27.fsf@drakenvlieg.flower> (raw)
In-Reply-To: <CAA2XvwLt2GzBoMNRv-0yGoYKW_9SP07G=Ayb4VGx9W1av4xpyA@mail.gmail.com> (Mikael Djurfeldt's message of "Wed, 16 Mar 2016 15:19:26 +0100")

Mikael Djurfeldt writes:

> In python, the version number is higher up in the directory hierarchy,
> which, hypothetically, allows newer versions to have "inventions" in
> the more detailed directory structure:
>
> /usr/lib/python2.6
> /usr/lib/python2.7
> etc
>
> Just a thought.

Python's case is a bit different

 * Python does not look at any environment variable to boot

in contrast, setting GUILE_LOAD_*PATH to the wrong place makes Guile
barf trying to load eval.* or boot-9.*.  Also, guix by default sets
GUILE_LOAD_PATH and GUILE_LOAD_COMPILED_PATH, thus "ensuring" that
different guile major versions will fail to boot.

Do we want Guile to look at environment variables to find its core
libraries?

 * Python has magic numbers and skip/recompiles if a .py[oc] does
   not match

This resembles what Ludovic suggested and what I have submitted a patch
for, to skip invalid .go files.

Greetings, Jan

--
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.nl



  reply	other threads:[~2016-03-19  9:26 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-04 13:13 [PATCH] Append effective version to GUILE_LOAD[_COMPILED]_PATH Jan Nieuwenhuizen
2016-03-11 18:14 ` [PATCH] Skip invalid compiled file found, continue searching path Jan Nieuwenhuizen
2016-03-11 22:02   ` David Kastrup
2016-03-13 10:15     ` Jan Nieuwenhuizen
2016-03-13 11:05       ` David Kastrup
2016-03-13 11:10         ` David Kastrup
2016-03-13 10:03   ` [PATCH v3] " Jan Nieuwenhuizen
2016-03-13 10:19     ` Jan Nieuwenhuizen
2016-03-14 16:10       ` [PATCH v4] " Jan Nieuwenhuizen
2016-03-16 14:19 ` [PATCH] Append effective version to GUILE_LOAD[_COMPILED]_PATH Mikael Djurfeldt
2016-03-19  9:26   ` Jan Nieuwenhuizen [this message]
2016-03-19 21:09     ` Ludovic Courtès

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