Bug#872891: gcc-multilib conflicts with GCC cross toolchains

[Vincent Danjean <vdanjean@debian.org>]

Package: gcc-multilib
Version: 4:11.2.0-2
Followup-For: Bug #872891

  Hi,

  I also have been hit by this bug.
I'm using several cross-tool chains (arm-linux-gnueabi, mipsel-linux-gnu,
i686-linux-gnu) and I was wondering why using plain gcc with -m32 does
not work.
  Perhaps due to the fact that gcc-i686-linux-gnu was installed, I successfully 
compile a basic C program (the one given in this bug report) but the link
fails ("gcc -m32" was looking only in x86_64 directory to find gcc libs and
objects)
  I first workaround this by looking at the LIBRARY_PATH of i686-linux-gnu-gcc
(adding "-v" when compiling to see the info), and I successfully link with
LIBRARY_PATH=...value_I_read... gcc -m32 file.o -o file

  Digging a bit more, I saw that gcc-multilib is an empty package with
a few dependencies and lots of conflicts. Only one dependencies was missing
on my system: gcc-11-multilib
  I tried to install it directly, the install succeeded (no conflicts for
gcc-11-multilib).
  And then, I discovered that "gcc -m32" works for both compiling and linking.

  So I'm really wondering why there are all these conflicts in gcc-multilib
(perhaps,  I works on my system because I also have several *:i386 packages
installed, or perhaps it works 'by chance' mixing files from different packages
that should not...)
  In anycase, for people that wish to have both cross chains and "gcc -m32"
working, manually installing the gcc-XX-multilib package for the current
compiler might be a solution.

  Regards
    Vincent

-- System Information:
Debian Release: bookworm/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'oldstable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armel, mipsel

Kernel: Linux 5.14.0-4-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gcc-multilib depends on:
ii  cpp              4:11.2.0-2
ii  gcc              4:11.2.0-2
ii  gcc-10-multilib  10.3.0-12
ii  gcc-11-multilib  11.2.0-10
ii  gcc-8-multilib   8.4.0-6
ii  linux-libc-dev   5.14.16-1

gcc-multilib recommends no packages.

gcc-multilib suggests no packages.