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bug#37123: gnome-shell: LD_LIBRARY_PATH setting propagates to entire ses
From: |
Ludovic Courtès |
Subject: |
bug#37123: gnome-shell: LD_LIBRARY_PATH setting propagates to entire session |
Date: |
Wed, 13 Nov 2019 23:02:52 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Hello,
Ricardo Wurmus <address@hidden> skribis:
>> Since commit 2b0c755d195c79bfc95cdbe802e1e2dea1adb7a2 in August 2018,
>> our 'gnome-shell' executable has been wrapped by a script that sets
>> LD_LIBRARY_PATH.
>>
>> One consequence of this, which I just noticed, is that if 'gnome-shell'
>> is based on 'core-updates' (or in my case, 'core-updates-next'), many
>> programs based on 'master' will fail to run within the resulting GNOME
>> session.
> […]
>> I was unable to easily find an existing bug report tracking this issue,
>> so I created this one.
>
> There was no bug report about this, so thanks for reporting it. I once
> brought this issue up on the mailing list here:
>
> https://lists.gnu.org/archive/html/guix-devel/2019-05/msg00372.html
Looking at this bit in the ‘gnome-shell’ definition:
--8<---------------cut here---------------start------------->8---
(wrap-program (string-append out "/bin/gnome-shell")
`("GI_TYPELIB_PATH" ":" prefix (,gi-typelib-path))
;; FIXME: gnome-shell loads these libraries with unqualified
;; names only, so they need to be on LD_LIBRARY_PATH. The
;; alternative might be to patch gnome-shell.
`("LD_LIBRARY_PATH" ":" prefix
,(map (lambda (pkg)
(string-append (assoc-ref inputs pkg) "/lib"))
'("gdk-pixbuf"
"gnome-bluetooth" "librsvg" "libgweather"))))
--8<---------------cut here---------------end--------------->8---
I checked in Gjs etc. how those imports (e.g., “imports.gi.Rsvg” in
Javascript) are turned into a dlopen. AIUI, this is done by
gobject-introspection based on info found in .gir files.
In Guix, .gir files contain absolute file names of share libraries. At
run-time, ‘gobject-introspection-absolute-shlib-path.patch’ ensures that
dlopen is passed absolute file names.
So, IIUC, “imports.gi.Rsvg” should lead to dlopen by absolute file name,
in which case setting LD_LIBRARY_PATH is useless.
However, does anyone know about we can test whether removing the
LD_LIBRARY_PATH wrapping above breaks something?
Thanks,
Ludo’.
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