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Compression error with debian.
dryzone:
This one has been going on for a couple of years with Lazarus on Debian.
There are no subforum search available so it is not possible to search for previous solutions.
The problem is as follows. z-compression used in the deb. Debian dropped the support seemingly for this compression.
I installed an available zst .deb and it installed successfully. the installation still throws the same error regardless whether zst is present or not.
*Why not stick to gz so all Linux flavors can understand the deb ?*
Why use exotic compression algorithms in your debs ?
Makes no sense. We want as many people as possible to use Lazarus, therefore use the widest supported compression algorithms e.g. gz. so that the software will at least install.
# dpkg --install lazarus-project_3.8.0-0_amd64.deb
dpkg-deb: error: archive 'lazarus-project_3.8.0-0_amd64.deb' uses unknown compression for member 'control.tar.zst', giving up
dpkg: error processing archive lazarus-project_3.8.0-0_amd64.deb (--install):
dpkg-deb --control subprocess returned error exit status 2
Errors were encountered while processing:
lazarus-project_3.8.0-0_amd64.deb
My system:
------------
NAME="MX"
VERSION="21.3 (Wildflower)"
ID="mx"
VERSION_ID="21.3"
PRETTY_NAME="MX 21.3 (Wildflower)"
ANSI_COLOR="0;34"
HOME_URL="https://mxlinux.org"
BUG_REPORT_URL="https://mxlinux.org"
PRETTY_NAME="MX 21.3 Wildflower"
DISTRIB_ID=MX
DISTRIB_RELEASE=21.3
DISTRIB_CODENAME="Wildflower"
DISTRIB_DESCRIPTION="MX 21.3 Wildflower"
PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
dbannon:
--- Quote from: dryzone on February 24, 2025, 04:26:21 am ---The problem is as follows. z-compression used in the deb. Debian dropped the support seemingly for this compression.
--- End quote ---
No, I don't think Debian dropped ZStandard, until recently, I don't think they supported it. From memory, Ubuntu did support it (in an official release) earlier than Debian but not sure if that was due to release cycle timing or Ubuntu 'updating' it.
--- Quote from: dryzone on February 24, 2025, 04:26:21 am ---NAME="MX"
VERSION="21.3 (Wildflower)"
--- End quote ---
Wildflower is based on Debian 11, "old stable".
From the man page (bookworm, debian 12)
-Zcompress-type
Specify which compression type to use when building a package. Allowed values are gzip, xz (since dpkg 1.15.6), zstd (since dpkg 1.21.18) and none (default is xz).
Looks to me like MX Wildflower uses something earlier than dpkg 1.21.18 ?
And, looks to me like whoever builds Lazarus debs is getting a bit excited with the faster compression algorithm. Yep, might be better to stick with xz for just a bit longer.
Davo
Edit : take the easy way out dryzone, build from source !
dryzone:
I can vividly remember the issue about dropping it as it was discussed on debian ug. I will try to get the post to see if I did not maybe misinterpreted it.
I will have to install from source, but it is really peculiar to me that Lazarus Dev seems to prefer a slight compression improvement at the penalty of losing the entire Debian base regarding the .deb distribution. this issue has been present for quite some time now..years.
I installed z as it was not present on vanilla Debian install, and it installed without error. Still the lazarus deb chocked, so I guess the problem goes a bit deeper with the deb distribution of Lazarus.
Makes utterly no sense.
MarkMLl:
This is an excerpt from 12/Bookworm:
--- Code: ---$ apt-cache search -n zst
...
libzstd-dev - fast lossless compression algorithm -- development files
libzstd1 - fast lossless compression algorithm
zstd - fast lossless compression algorithm -- CLI tool
zst - CLI tool for zstd (and other) compression
--- End code ---
Ditto v11.
Looking at the incremental log of what I've installed, I believe that the zstd package was installed as part of the fundamental binaries. I also believe that the last of the various LZ patents lapsed a long time ago.
MarkMLl
dbannon:
No, you may have missed the point, zst was available in Debian 11 (Bullseye) but dpkg (and friends) did not use it until release 1.21.18. That was early 2023, too early to make it into Debian 11. Its available and works with dpkg in Debian 12 (bookworm).
In all cases, zx is dpkg's default, the Lazarus Packager must be giving an option to use zst OR is using Ubuntu packaging tools which, from memory, recently default to zst.
You have to feel for Ubuntu, they desperately want to make their mark but everything they come up with is greeted with a yawn (Unity, Snaps, dpkg using zst).
Davo
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