Debian and Ubuntu users can install the updater package:
from the official apt repositories and then it will be linked to the correct library versions on their Debian or Ubuntu system.
I haven't packaged the updater utility for Fedora yet, as it is a relatively small package to create I left that as an exercise for somebody else in the xTuple community to get started with Fedora packaging, if anybody wants to have a go please feel free to contact me by email to discuss. I always run the updater on a Debian system myself so I didn't have an urgent need to package it on Fedora either, but if somebody wants to sponsor that work I'm willing to get it done.
It may also be better to simply merge the updater into the qt-client repository, that would reduce the number of source packages that need to be supported. Gil, how would you feel about that?
Using the official packages for Debian, Ubuntu or Fedora is definitely better than downloading from Sourceforge or Github, the official packages in each Linux distribution are built and tested for each platform with the corresponding library versions on that platform. Each time a new Ubuntu version is released, everything is rebuilt with their new libraries. We are also able to support a range of other architectures such as ARM and POWER and even S390 using the Debian build servers: