kchmviewer -configure: error: conditional "include_x11" was never defined ??

Tim, Darrell, I have run into another failure that I don't understand. This time it is an error looking for x11 with kchmviewer. I haven't seen this error before: checking for X... libraries , headers checking for gethostbyname... yes checking for connect... yes checking for remove... yes checking for shmat... yes checking for IceConnectionNumber in -lICE... yes checking for chm_open in -lchm... yes Please remember to use GNU make, often installed as gmake. Install prefix : /opt/trinity KDE support : disabled. Qt includes : Qt libraries : chmlib to link : system checking if lib should be compiled... yes checking if po should be compiled... yes checking if src should be compiled... yes checking that generated files are newer than configure... done configure: error: conditional "include_x11" was never defined. Usually this means the macro was only invoked conditionally. ==> ERROR: A failure occurred in build(). Where do I even begin finding out what caused the: configure: error: conditional "include_x11" was never defined. -- David C. Rankin, J.D.,P.E.