Comment # 16 on bug 983167 from Ludwig Nussel

(In reply to Franck Bui from comment #15)
> (In reply to Ludwig Nussel from comment #12)
> > (In reply to Dr. Werner Fink from comment #11)
> > > On the other hand I'm wondering why the automagic requirement detections
> > > from rpmbuild do not detect that the *.so links or linker scripts do require
> > > some real libraries ;)
> > 
> > That's a fair question but doesn't help in this case as the libs are in
> > libsystemd0 which is already required explicitly in systemd-devel.
> > Most -devel packages require their main package anyways, so unless there are
> > specific reasons why sytemd-devel doesn't require systemd I'd actualyl try
> > adding that requirement.
> 
> That looks strange: installing systemd package as buildrequire and all its
> dependencies simply to be able to use systemd.pc.

That's a consequence of putting systemd.pc into the systemd package :-) If
packages BuildRequire pkgconfig(systemd) the build system would likely choose
systemd-mini instead though.

Let me try to describe the problem again:

1. packages requiring systemd-devel and expecting systemd.pc to be
   installed
2. packages requiring systemd-devel and expecting all directories of
   systemd have an owner.

AFAICS so far there are multiple possible solutions, e.g.

a) put a Support: systemd in prjconfig and have systemd in all
   buildroots to mimic SLE => undesirable as it makes bootstrapping
   harder or impossible. Will for sure hurt later.
b) fix all affected packages in SLE and Leap to BuildRequire:
   pkgconfig(systemd). Is an effort but solves 1) and 2)
c) move systemd.pc back to systemd-devel. To also solve 2)
   systemd-devel additionally must own several directories where
   packages might install files into.
d) make systemd-devel require systemd

Pick your poison please :-)

> I took a look at bluez package since you mentioned initially, and I don't
> see why systemd.pc is needed.

It wants to figure out where to install service files I suppose:
https://build.opensuse.org/package/live_build_log/openSUSE:Leap:42.2:Staging:B/bluez/standard/x86_64

[   39s] checking systemd system unit dir... Package systemd was not found in
the pkg-config search path.
[   39s] Perhaps you should add the directory containing `systemd.pc'
[   39s] to the PKG_CONFIG_PATH environment variable
[   39s] No package 'systemd' found
[   39s] configure: error: systemd system unit directory is required