From: lew.pitcher@digitalfreehold.ca   
      
   Hi, guys   
      
   I'm in the process of upgrading my Slackware 14.2 CUPS service in order   
   to accommodate my system's new "IPP Everywhere" printer (a Brother   
   MFC-L8610cdw colour laser printer). As is my standard, I install   
   self-compiled programs and libraries under the /usr/local tree, so as   
   to distinguish them from the Slackware provided programs and libraries   
   found elsewhere, and I did so for this new version of CUPS. For the   
   record, I upgraded   
    qpdf to v8.3.0 (required by cups-filters),   
    cups to Openprinting Cups v2.4.14,   
    cups-filters to Openprinting Cups v1.28.16, and   
    gutenprint to v5.3.5   
      
   I built these in a "clean room" install of Slackware 14.2 running under   
   LXC on my development box, and (after some back and forth with ./configure   
   settings) I managed to get the laser printer to work with this new   
   version of Cups. However, when I installed these upgrades (packaged as   
   locally-built Slackware packages), my (hardware) Slackware 14.2 system   
   would not print, complaining of a cups "filter failure".   
      
   It turns out that the Slackware aaa_elflibs package includes two   
   libraries that the Cups package also supplies (/usr/lib64/libcups.so.2   
   and  /usr/lib64/libcupsimage.so.2), which (as they had regestered in   
   ld.so.conf ahead of my new libraries) interfered with the proper   
   execution of the new filters.   
      
   I temporarily worked around this by softlinking those two libraries   
   to my new libraries in /usr/local/lib64, and managed to properly print   
   to the new printer. I recognize that this solution does not represent   
   the best fix for the problem, andI will pursue a better solution as I   
   progress in this install.   
      
   So, a caveat for those of you who are looking at replacing Cups, if   
   you find that you get filter failures when you shouldn't, check for   
   interfering libraries that aaa_elflibs may have populated.   
      
   TTFN   
   --   
   Lew Pitcher   
   "In Skills We Trust"   
   Not LLM output - I'm just like this.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)