Arch Linux

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,628

[Solved] canon UFRII & libxml2 issues

In https://bbs.archlinux.org/viewtopic.php?id=305329 an issue with canon drivers was found that can be solved by installing libxml2-legacy .

I've checked a clean build of cnrdrvcups-lb 1:6.10.1.01-1 and found this :

cnrdrvcups-lb W: Referenced library 'libxml2.so.2' is an uninstalled dependency (needed in files ['usr/lib/libcanonufr2r.so.1.0.0', 'usr/bin/cnpkbidir'])

Building against libxml2-legacy doesn't gives this warning .

$ pacman -Ql libxml2 | grep libxml2.so
libxml2 /usr/lib/libxml2.so
libxml2 /usr/lib/libxml2.so.16
libxml2 /usr/lib/libxml2.so.16.0.2
$ 
$ pacman -Ql libxml2-legacy | grep libxml2.so
libxml2-legacy /usr/lib/libxml2-legacy/lib/libxml2.so
libxml2-legacy /usr/lib/libxml2-legacy/lib/libxml2.so.2
libxml2-legacy /usr/lib/libxml2.so.2
libxml2-legacy /usr/lib/libxml2.so.2.13.8
$

Apparently the soname-scheme used in libxml2 has changed dramatically .

I can ofcourse change deps from libxml2 to libxml2-legacy , but is there a better solution ?

Last edited by Lone_Wolf (2025-05-07 07:50:31)

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Scimmia

Fellow

Registered: 2012-09-01

Posts: 12,655

Re: [Solved] canon UFRII & libxml2 issues

Is this a package pulling upstream binaries? Then change the dep. Is this a package building from source? Then build it against the new lib.

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,628

Re: [Solved] canon UFRII & libxml2 issues

The cnrdrvcups-lb PKGBUILD is a mix of opensource & binary code.

libcanonufr2r.so.1.0.0 and cnpkbidir are proprietary binaries and have problems with the new libxml2 .
(other parts are fine with it)

Canon tests the driver on supported *nix versions (prinarily debian & redhat stable versions).

Issues with the driver can be caused by differences between archlinux & debian/redhat packaging source builds, stuff done in the proprietary parts and have other causes.

Building against the new libxml2 breaks hard for atleast 2 printer models, I was hoping changes to the build can solve the issue.

---

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clean chroot building not flexible enough ?
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V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,379

Re: [Solved] canon UFRII & libxml2 issues

libxml2 2.14 is actively soname/ABI incompatible as far as I've seen, so using libxml2-legacy is correct until Canon rebuilds their blobs with the new libxml2 version

Since that just came out, it will probably be a while until this trickles down to Ubuntu/Debian and in the interim it's probably simpler to just depend on legacy.

Last edited by V1del (2025-05-06 10:53:20)

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,628

Re: [Solved] canon UFRII & libxml2 issues

Thanks for the input, Scimmia & V1del .

I uploaded cnrdrvcups-lb 1:6.10.1.01-2 to aur which depends on libxml2-legacy .

Marking as Solved.

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky