[arch-dev-public] Cyclic dependencies between systemd and util-linux

Thomas Bächler thomas at archlinux.org
Mon Feb 24 17:05:12 EST 2014

Am 24.02.2014 20:18, schrieb Dave Reisner:
> On Mon, Feb 24, 2014 at 07:56:56PM +0100, Thomas Bächler wrote:
>> Right now, we have a problem with cyclic dependencies in core: systemd
>> requires libblkid and libuuid (systemd-udevd) and util-linux requires
>> libudev (findmnt, and soon uuidd [1]).
> Do you run a huge SAP install? I don't run a huge SAP install. I'm not
> sure why anyone who doesn't run a huge SAP install cares about uuidd,
> but I understand your concern.

I think my sarcasm-detector is broken, there's a red light flashing that
wasn't there before.

>> I don't like this situation and currently it is revoled by adding
>> systemd as optdepend to util-linux. This has the side effect that in a
>> chroot with only certain packages installed, one has to explicitly
>> install systemd to get findmnt working. Since I've run into this
>> situation and cyclic deps are bad, I propose the following:
>> Split both util-linux and systemd into libutil-linux/util-linux and
>> libsystemd/systemd. Then we could have both util-linux and systemd
>> depend on both libsystemd and libutil-linux.
> Is this really necessary just to avoid minor problems in chroots? We
> used to have a libsystemd package, and subsequently ditched it. I don't
> see anything critical here.

It's probably the right thing to do (better than some fishy optdepend).
And since I am extremely fond of findmnt, it would make me incredibly happy.

> But hey, for some good news, there's already/still packages which depend
> on libsystemd.

Great stuff!

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