GNU bug report logs - #43491
Fakechroot execution engine can fail to find libraries

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Package: guix;

Reported by: Ludovic Courtès <ludovic.courtes <at> inria.fr>

Date: Fri, 18 Sep 2020 13:29:01 UTC

Severity: important

Done: Ludovic Courtès <ludovic.courtes <at> inria.fr>

Bug is archived. No further changes may be made.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ludovic Courtès <ludovic.courtes <at> inria.fr>
Subject: bug#43491: closed (Re: bug#43491: Fakechroot execution engine can
 fail to find libraries)
Date: Fri, 17 Mar 2023 22:27:02 +0000

[Message part 1 (text/plain, inline)]
Your bug report

#43491: Fakechroot execution engine can fail to find libraries

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 43491 <at> debbugs.gnu.org.

-- 
43491: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=43491
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]
From: Ludovic Courtès <ludovic.courtes <at> inria.fr>
To: 43491-done <at> debbugs.gnu.org
Subject: Re: bug#43491: Fakechroot execution engine can fail to find libraries
Date: Fri, 17 Mar 2023 23:26:51 +0100

Ludovic Courtès <ludovic.courtes <at> inria.fr> skribis:

> $ unshare -m -U -r -f sh -c 'mount -t tmpfs none /gnu; GUIX_EXECUTION_ENGINE=fakechroot /tmp/fakechroot-test/bin/IMB-MPI1'
> /tmp/fakechroot-test/gnu/store/i9ypns78lmy8xr0x4zvdwc4b80m0yl72-intel-mpi-benchmarks-2019.6/bin//IMB-MPI1: error while loading shared libraries: libevent_core-2.1.so.7: cannot open shared object file: No such file or directory
>
> Reason appears to be that ‘LOADER_AUDIT_RUNPATH’ only contains what’s in
> the RUNPATH of ‘IMB-MPI1’ and not its indirect dependencies—libevent is
> one of them.

Fixed (for good!) in d15dbdb79c617b8b710ef5a9502be0d5f640aaaf!

Ludo’.


[Message part 3 (message/rfc822, inline)]
From: Ludovic Courtès <ludovic.courtes <at> inria.fr>
To: <bug-guix <at> gnu.org>
Subject: Fakechroot execution engine can fail to find libraries
Date: Fri, 18 Sep 2020 15:28:18 +0200

Using the ‘fakechroot’ execution engine of ‘guix pack -RR’, I found a
case where an executable’s NEEDED library is not found.

--8<---------------cut here---------------start------------->8---
$ guix describe
Generacio 159	Sep 18 2020 08:55:27	(nuna)
  guix 98b89f4
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 98b89f432103b66efacee0bcba41a94148b8e870
$ mkdir /tmp/fakechroot-test
$ (cd /tmp/fakechroot-test; tar xf $(guix pack -RR openmpi -S /bin=bin -v0))
$ unshare -m -U -r -f sh -c 'mount -t tmpfs none /gnu; echo /gnu/*; GUIX_EXECUTION_ENGINE=fakechroot /tmp/fakechroot-test/bin/orterun'
/gnu/*
/tmp/fakechroot-test/gnu/store/rm1d9z3z3iwsv779vqlg7q5z7pdk5k12-openmpi-4.0.5/bin//orterun: error while loading shared libraries: libevent_core-2.1.so.7: cannot open shared object file: No such file or directory
--8<---------------cut here---------------end--------------->8---

That library is in the RUNPATH of the original executable though:

--8<---------------cut here---------------start------------->8---
$ objdump -x $(guix build openmpi)/bin/orterun | grep PATH
objdump: Advertiment: '/gnu/store/3ign6b3i5ambjgqqiyman4mqw0wljlvl-openmpi-4.0.5-debug' és un directori
  RUNPATH              /gnu/store/rm1d9z3z3iwsv779vqlg7q5z7pdk5k12-openmpi-4.0.5/lib:/gnu/store/xk22b03jb0c0b6vkadqbkr9d4556rwxh-hwloc-2.2.0-lib/lib:/gnu/store/i1smdd4r44c5wwi03g40dvc6wfnqgdwq-libpciaccess-0.16/lib:/gnu/store/c7wscymmk379v16invi8m68f6v5c8gsv-libevent-2.1.11/lib:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/lib:/gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib:/gnu/store/rykm237xkmq7rl1p0nwass01p090p88x-zlib-1.2.11/lib:/gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/../../..
$ objdump -x $(guix build openmpi)/bin/orterun | grep NEED.*libevent
objdump: Advertiment: '/gnu/store/3ign6b3i5ambjgqqiyman4mqw0wljlvl-openmpi-4.0.5-debug' és un directori
  NEEDED               libevent_core-2.1.so.7
  NEEDED               libevent_pthreads-2.1.so.7
--8<---------------cut here---------------end--------------->8---

Ludo’.
This bug report was last modified 2 years and 125 days ago.

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