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Running 32-bit programs on 21.04

cn flag
Keith Ray

I am new to Ubuntu and might have made a big mistake, just installed Ubuntu 21.04 on an old PC and trying to run a 32 bit program on it. Looking it up it appears I have to run the following to make it compatable with a 64 bit operating system. dpkg --add-architecture i386 apt install lib32z1

On running “dpkg --add-architecture i386” I get

dpkg: error: configuration error: /etc/dpkg/dpkg.cfg.d/multiarch:1: unknown option 'foreign-architecture'

Looked at the offending file “foreign-architecture i386”. On running “apt install lib.32z1”

root@g1gxb-ubuntu:/home/g1gxb# apt install lib32z1
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
  libllvm11
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libc6-i386
The following NEW packages will be installed
  lib32z1 libc6-i386
0 to upgrade, 2 to newly install, 0 to remove and 0 not to upgrade.
Need to get 0 B/2,689 kB of archives.
After this operation, 13.7 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
dpkg: error: configuration error: /etc/dpkg/dpkg.cfg.d/multiarch:1: unknown 
option 'foreign-architecture'
E: Sub-process /usr/bin/dpkg returned an error code (2)

Where am I going wrong?

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user535733 avatar
cn flag
user535733
Add to your question the complete contents of the file `/etc/dpkg/dpkg.cfg.d/multiarch`
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cn flag
Keith Ray
root@g1gxb-ubuntu:/etc/dpkg/dpkg.cfg.d# ls -la total 16 drwxr-xr-x 2 root root 4096 Aug 8 14:32 . drwxr-xr-x 4 root root 4096 Aug 8 12:40 .. -rw-r--r-- 1 root root 26 Aug 8 10:46 multiarch -rw-r--r-- 1 root root 204 Apr 26 2020 pkg-config-hook-config and the file contains. post-invoke=if { test "$DPKG_HOOK_ACTION" = add-architecture || test "$DPKG_HOOK_ACTION" = remove-architect>
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hr flag
steeldriver
@KeithRay please [edit] that information into your question so that it is properly formated. FWIW I don't think either `lib32z1` or `libc6-i386` are packages from the i386 foreign architecture (if they were, they'd be named something like `libc6:i386`)
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Knud Larsen avatar
by flag
Knud Larsen
https://www.omgubuntu.co.uk/2019/06/ubuntu-is-dropping-all-32-bit-support-going-forward → → "Ubuntu has confirmed plans to drop all support for 32-bit (i386) systems going forward, beginning with the upcoming Ubuntu 19.10 release". .... ?Ubuntu 20.04 may still install / run 32bit ?
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user535733 avatar
cn flag
user535733
@KnudLarsen A long list of 32-bit libraries are still supported to provide compatibility with Steam, Wine, and other common uses. Ubuntu no longer produces complete 32-bit systems, and has dropped support for a different long list of 32-bit libraries due to a lack of volunteers to test and maintain them.
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Score:1
avatar Ubuntu
cn flag
Keith Ray

Problem solved. Had to delete two files in the /etc/dpkg/dpkg.cfg.d, Multiarch and pkg-config-hook-config and then it all worked

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N0rbert avatar
zw flag
N0rbert
The pkg-config-hook-config file is useful, you have to reinstall it by `sudo apt-get install --reinstall -o Dpkg::Options::="--force-confask,confnew,confmiss" pkg-config ` .
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