The hint is in
the name. ;-)
Here is the libr that it is looking for:
http://www.compholio.com/elfres/#download
Looks like a Debian/'buntu only thing. I am not seeing anything related
for Slackware. Easy enough to set to OFF. :)
It's not. There are sources on the bottom of the page.
When libr is installed it allows TDE to add and read metadata from ELF
executables, such as a preferred icon, time/date of creation, etc.
Tim