Interestingly, if I add "Requires: libjack0" then rpmlint complains: I should rpm let figure this out instead of explicitly requiring it.

musique.x86_64: E: explicit-lib-dependency libjack0
You must let rpm find the library dependencies by itself. Do not put unneeded
explicit Requires: tags.

If I omit this, then libjack0 is not installed as a dependency, however pipewire-libjack-0_3 is installed. libjack0 is however later needed when starting the program.

If I add the Requires: libjack0, then when installing musique libjack0 is installed, but pipewire-libjack-0_3 is not installed.

So what to do?

Edit: I found some posts on the Internet about pipewire-libjack replacing libjack. But some packages (could not figure out which) still seem to insist on using libjack.

was the lack of libjack0 preventing musique from starting?

Yes. I tested again:

• Build the package without Requires: libjack0
• Create new distrobox: distrobox enter
• Install musique: zypper in musique-1.12-0.x86_64.rpm
• Start musique: musique: error while loading shared libraries: libjack.so.0: cannot open shared object file: No such file or directory
• Looking for libjack.so.0: rpm -ql pipewire-libjack-0_3 results in

/etc/alternatives/pw-jack
/etc/alternatives/pw-jack.1.gz
/usr/bin/pw-jack
/usr/bin/pw-jack-0.3
/usr/lib64/pipewire-0.3/jack
/usr/lib64/pipewire-0.3/jack/libjack.so.0
/usr/lib64/pipewire-0.3/jack/libjack.so.0.3.1004
/usr/lib64/pipewire-0.3/jack/libjacknet.so.0
/usr/lib64/pipewire-0.3/jack/libjacknet.so.0.3.1004
/usr/lib64/pipewire-0.3/jack/libjackserver.so.0
/usr/lib64/pipewire-0.3/jack/libjackserver.so.0.3.1004
/usr/share/man/man1/pw-jack-0.3.1.gz
/usr/share/man/man1/pw-jack.1.gz
/usr/share/pipewire/jack.conf

So the library is there in /usr/lib64/pipewire-0.3/jack, but the loader seems not to search there. ldconfig -p | grep jack gives no output. I also cannot see any ldconfig configuration file in /etc/ld.so.conf.d.

Note: this all happens in a distrobox, so I don't know whether it is a distrobox problem not correctly updating the ldconfig cache or a pipewire problem not correctly providing the ldconfig configuration.

However it seems that I should move this issue to some other place. What would be the best place to discuss this?

Edit: if I start the application using pw-jack musique then it works! But is this the suggested way to start it?

that would be a pipewire bug then. musique doesn't link to it.

cc @alarrosa

Some info from a normal installation: I did test it on TW. When libjack0 itself is installed, it works without problem. When pipewire-libjack-0_3 is installed and libjack0 removed I get the error you have. pw-jack musique also works fine.

I get the same error with qjackctl, so I would file a bug at bugzilla.opensuse.org against pipewire.

BTW: I don't get why musique would need/use jack.

This is already a bug in bugzilla. The explanation starts at comment 8: https://bugzilla.opensuse.org/show_bug.cgi?id=1211926#c8

So for the time being the user has to install pipewire-jack additionally to get the ldconfig configuration file. The bug is still open and I hope there will be a good solution for it. However this is nothing where musique can and should do anything.

It is a transitive dependency which is pulling in libjack. ffmpeg (libavdevice) and libmpv2 are requiring this library.