32-bit Slackware Chroot on Slackware64: Multilib Alternative
by loon & intox
Basically, the process can be summed up as:
Make Directory for chroot
Get 32 bit slack ISO
Mount ISO outside of chroot directory
Install things from iso into the chroot
Mount and bind various files
Configure the system
Run programs, should display x applications on your normal x instance.
mkdir dvd slack32_chroot mount slack.iso dvd/ cd dvd/slackware
installpkg –root ../../slack32_chroot a/.t?z ap/.t?z d/.t?z e/.t?z f/.t?z k/.t?z kde/.t?z kdei/.t?z l/.t?z n/.t?z t/.t?z tcl/.t?z x/.t?z xap/.t?z xfce/.t?z y/.t?z
(or whatever packages groups you want, I just went for them all because why not)
mount -o bind /dev slack32_chroot/dev mount -o bind /proc slack32_chroot/proc mount -o bind /sys slack32_chroot/sys mount -o bind /tmp slack32_chroot/tmp mount --bind /etc/resolv.conf slack32_chroot/etc/resolv.conf
Here you’ll need to create a user with the same user ID as your normal user. Give it all the permissions you normally would for whatever the applications you want to run require.
cp /home/user/.Xauthority slack32_chroot/home/user/ chroot slack32_chroot
Setup slackpkg / sbopkg / mirror, update, upgrade, install what you want from 32 bit packages. Launch xeyes or whatever to test. Should work. Make sure when you’re configuring the mirror, you set it to a 32 bit mirror. Also, when using slackbuilds, I ran into a few problems which were fixed by manually editing the slackbuilds to use 32 bit. For example, in a slackbuild, add this after the place where it checks for architecture:
Now, every time you reboot you’ll have to re-bind and remount everything, as well as re-copy your .Xauthority. That’s a pain. So just stick this script in the same directory as the chroot and run it before chrooting into it:
#!/bin/bash mount -o bind /dev slack32_chroot/dev mount -o bind /sys slack32_chroot/sys mount -o bind /tmp slack32_chroot/tmp mount -o bind /proc slack32_chroot/proc mount --bind /etc/resolv.conf slack32_chroot/etc/resolv.conf mount --bind /home/user/.Xauthority slack32_chroot/home/john/.Xauthority
Of course replacing user with your user ID. Obviously chmod +x the file you put that script in, and to enter the chroot just run chroot slack32_chroot or whatever directory you made your chroot in…
Works well for me. Why not just use alienbob’s multilib support? Well, you can and it’ll probably work fine, but I’ve run into a few problems with it and this just felt safer.