I decided to build against Qt3 rather than TQt3. First time in a long time. The patch we used recently to build avahi-tqt against TQt3 can't be used when building against Qt3. The patch is good only when building against TQt3. I presume the proper way to implement the patch is to add some preprocessor checks so packagers don't have to worry about the issue. For myself I added the following test in my avahi-tqt build script: if [ -r ${PREFIX}/lib/pkgconfig/tqt-mt.pc ] || [ -r /usr/lib/pkgconfig/tqt-mt.pc ]; then cat $CWD/avahi-tqt-fixes.diff | patch -p1 --verbose --no-backup-if-mismatch || exit 1 fi tdebase fails to build: /dev/shm/tdebase.build/kicker/kicker/core/kmenubase.ui.h:7: error: 't_xdisplay' was not declared in this scope As neither tqt_xdisplay nor qt_xdisplay is used in the source file, why does the file compile against TQt3 and not Qt3? Darrell