Re: DNF reports missing dependency; RPM doesn't

Tuesday, 1 February 2022

Ian Pilcher wrote:
...
 From the what the actual ... department:

   $ sudo dnf install libsavl-0.0-0.fc35.x86_64.rpm
   Last metadata expiration check: 2:44:13 ago on Tue 01 Feb 2022 10:04:49 AM
 CST.
   Error:
    Problem: conflicting requests
     - nothing provides /usr/sbin/ldconfig needed by
 libsavl-0.0-0.fc35.x86_64
   (try to add '--skip-broken' to skip uninstallable packages)

   $ rpm -q --whatprovides /usr/sbin/ldconfig
   glibc-2.34-11.fc35.x86_64

   $ sudo rpm -ihv libsavl-0.0-0.fc35.x86_64.rpm
   Verifying... ################################# [100%]
   Preparing... ################################# [100%]
   Updating / installing...
      1:libsavl-0.0-0.fc35 ################################# [100%]

 Anyone have any idea what the heck is going on? 
I'm guessing libsavl-0.0-0.fc35.x86_64.rpm is a locally
built package?

I think the issue is that glibc doesn't really provide
/usr/sbin/ldconfig.  It installs the file as /sbin/ldconfig.

I haven't looked, but I'm guessing that `rpm -q
--whatprovides` is looking at the file and then finding that
/sbin/ldconfig is the same as /usr/sbin/ldconfig.

If you check the provides of glibc, you get:

    $ rpm -q glibc
    glibc-2.34-8.fc35.x86_64

    $ rpm -q --provides glibc | grep ldconfig
    ldconfig

Compare `dnf provides /sbin/ldconfig` and `dnf provides
/usr/sbin/ldconfig` as well as `dnf repoquery --whatrequires
/sbin/ldconfig` and `dnf repoquery --whatrequires
/usr/sbin/ldconfig`.

You should be able to adjust the Requires in the libsavl
pacakge to fix that.  Whether there are bugs worth chasing
and fixing in the rpm and dnf handling here, I don't know.

-- 
Todd