libr?

Hi, I'm trying to build the git version of trinity for Slackware64 14.1. I'm using some scripts which worked about a year ago (I know, long time). Now when I get to tdebase it whines -- Looking for X11/XKBlib.h - found -- Looking for XkbLockModifiers in X11 -- Looking for XkbLockModifiers in X11 - found -- Looking for XkbSetPerClientControls in X11 -- Looking for XkbSetPerClientControls in X11 - found -- checking for one of the modules 'arts' -- checking for one of the modules 'libart-2.0' -- checking for one of the modules 'dbus-1' -- checking for one of the modules 'dbus-1-tqt' -- checking for one of the modules 'libr' CMake Error at ConfigureChecks.cmake:429 (message): elficon support was requested, but libr was not found on your system Call Stack (most recent call first): CMakeLists.txt:202 (include) Now, I guess I can remove blindly elficon support and try again, but if I knew where libr comes from, I could try installing that. My feeble attempts at web searches revealed nothing, as did some minor poking around on an Ubuntu system with 'dpkg --search'. Can anyone point me in the right direction? Thanks. Jim