k3b - massive 'undefined reference to `vtable for ...' ??

Tim, Darrell, All, Latest build attempts on k3b led to massive error of the form: 'undefined reference to `vtable for ...' I have no idea what went wrong. I've never seen this type of error before. I have put up the full log at: http://www.3111skyline.com/dl/dt/tde/err/applications/k3b/20120723-201006_t… A summary of the log beginning with the undefined errors is here: http://www.3111skyline.com/dl/dt/tde/err/applications/k3b/k3b-undef-ref-sum… What is strange is that k3b builds for a full 7 minutes before hitting whatever it hit and then explodes. A sample of the actual errors are: /bin/sh ../libtool --tag=CXX --mode=link g++ -Wno-long-long -Wundef -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -O2 -march=i686 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -Wformat-security -Wmissing-format-attribute -Wno-non-virtual-dtor -fno-exceptions -fno-check-new -fno-common -I/usr/include/tqt -L/opt/trinity/lib -L/opt/tqt3/lib -L/opt/trinity/lib/trinity -R /opt/trinity/lib -R /opt/trinity/lib -R /opt/tqt3/lib -R /opt/trinity/lib/trinity -ltqt-mt -lz -lpng -lz -lm -lXext -lX11 -lSM -lICE -ltqt -lpthread -lDCOP -ltdecore -ltdeui -ltdefx -lkio -lktexteditor -Wl,-O1,--sort-common,--as-needed,-z,relro -o k3b k3bwelcomewidget.o k3bapplication.o k3bdiroperator.o k3bfiletreeview.o k3bprojecttabwidget.o k3bsplash.o k3bfileview.o k3bdirview.o k3b.o main.o k3bstatusbarmanager.o k3bfiletreecombobox.o k3binterface.o k3bjobinterface.o k3bprojectinterface.o k3bdataprojectinterface.o k3bsystemproblemdialog.o k3bmediacontentsview.o k3bsidepanel.o k3bcontentsview.o k3bjobprogressdialog.o k3bburnprogressdialog.o k3btempdirselectionwidget.o k3bdatamodewidget.o k3bwritingmodewidget.o k3bwriterselectionwidget.o k3binteractiondialog.o k3bthememanager.o k3bprojectmanager.o k3btrm.o k3bmusicbrainz.o k3baudioprojectinterface.o k3bmixedprojectinterface.o k3bflatbutton.o k3bemptydiscwaiter.o k3bjobprogressosd.o k3bdebuggingoutputdialog.o k3bdebuggingoutputfile.o k3bappdevicemanager.o k3bmediacache.o k3bmedium.o k3bmediaselectioncombobox.o k3btooltip.o k3bwidgetshoweffect.o k3bmediaselectiondialog.o k3bdiskinfoview.o k3bpassivepopup.o k3btimeoutwidget.o k3bminibutton.o k3bthemedheader.o k3bthemedlabel.o k3blsofwrapper.o k3blsofwrapperdialog.o k3bservicemenuinstaller.o k3bfirstrun.o k3binterface_skel.o k3bjobinterface_skel.o k3bprojectinterface_skel.o k3bdataprojectinterface_skel.o k3baudioprojectinterface_skel.o k3bmixedprojectinterface_skel.o ./option/liboption.la ./rip/librip.la ./projects/libprojects.la ../libk3bdevice/libk3bdevice.la ../libk3b/libk3b.la ./misc/libmisc.la ./fastscale/libfastscale.la -ltdefx -lkio -lkparts -lmusicbrainz -lm -L/opt/trinity/lib -L/opt/tqt3/lib -L/opt/trinity/lib/trinity libtool: link: g++ -Wno-long-long -Wundef -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -O2 -march=i686 -mtune=generic -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -Wformat-security -Wmissing-format-attribute -Wno-non-virtual-dtor -fno-exceptions -fno-check-new -fno-common -I/usr/include/tqt -Wl,-O1 -Wl,--sort-common -Wl,--as-needed -Wl,-z -Wl,relro -o .libs/k3b k3bwelcomewidget.o k3bapplication.o k3bdiroperator.o k3bfiletreeview.o k3bprojecttabwidget.o k3bsplash.o k3bfileview.o k3bdirview.o k3b.o main.o k3bstatusbarmanager.o k3bfiletreecombobox.o k3binterface.o k3bjobinterface.o k3bprojectinterface.o k3bdataprojectinterface.o k3bsystemproblemdialog.o k3bmediacontentsview.o k3bsidepanel.o k3bcontentsview.o k3bjobprogressdialog.o k3bburnprogressdialog.o k3btempdirselectionwidget.o k3bdatamodewidget.o k3bwritingmodewidget.o k3bwriterselectionwidget.o k3binteractiondialog.o k3bthememanager.o k3bprojectmanager.o k3btrm.o k3bmusicbrainz.o k3baudioprojectinterface.o k3bmixedprojectinterface.o k3bflatbutton.o k3bemptydiscwaiter.o k3bjobprogressosd.o k3bdebuggingoutputdialog.o k3bdebuggingoutputfile.o k3bappdevicemanager.o k3bmediacache.o k3bmedium.o k3bmediaselectioncombobox.o k3btooltip.o k3bwidgetshoweffect.o k3bmediaselectiondialog.o k3bdiskinfoview.o k3bpassivepopup.o k3btimeoutwidget.o k3bminibutton.o k3bthemedheader.o k3bthemedlabel.o k3blsofwrapper.o k3blsofwrapperdialog.o k3bservicemenuinstaller.o k3bfirstrun.o k3binterface_skel.o k3bjobinterface_skel.o k3bprojectinterface_skel.o k3bdataprojectinterface_skel.o k3baudioprojectinterface_skel.o k3bmixedprojectinterface_skel.o -L/opt/trinity/lib -L/opt/tqt3/lib -L/opt/trinity/lib/trinity /opt/tqt3/lib/libtqt-mt.so -L/usr/lib/mysql -L/usr/X11R6/lib -lpq -lmysqlclient -lXrender -lXrandr -lXcursor -lXinerama -lXft -lfreetype -lfontconfig -ldl -lpng -lz -lXext -lX11 -lSM -lICE /usr/lib/libtqt.so -lpthread /opt/trinity/lib/libDCOP.so /opt/trinity/lib/libtdeui.so /opt/trinity/lib/libktexteditor.so ./option/.libs/liboption.a ./rip/.libs/librip.a ./projects/.libs/libprojects.a ../libk3bdevice/.libs/libk3bdevice.so ../libk3b/.libs/libk3b.so -lsamplerate -ldvdread /build/src/k3b/libk3bdevice/.libs/libk3bdevice.so ./misc/.libs/libmisc.a ./fastscale/.libs/libfastscale.a /opt/trinity/lib/libtdecore.so -ljpeg /opt/trinity/lib/libtdefx.so /opt/trinity/lib/libkio.so /opt/trinity/lib/libkparts.so -lmusicbrainz -lm -Wl,-rpath -Wl,/opt/trinity/lib -Wl,-rpath -Wl,/opt/tqt3/lib -Wl,-rpath -Wl,/opt/trinity/lib/trinity k3bwritingmodewidget.o: In function `K3bWritingModeWidget::~K3bWritingModeWidget()': k3bwritingmodewidget.cpp:(.text+0x10): undefined reference to `vtable for K3bWritingModeWidget' k3bwritingmodewidget.cpp:(.text+0x17): undefined reference to `vtable for K3bWritingModeWidget' k3bwritingmodewidget.cpp:(.text+0x21): undefined reference to `vtable for K3bWritingModeWidget' k3bwritingmodewidget.o: In function `K3bWritingModeWidget::K3bWritingModeWidget(TQWidget*, char const*)': k3bwritingmodewidget.cpp:(.text+0x722): undefined reference to `vtable for K3bWritingModeWidget' k3bwritingmodewidget.cpp:(.text+0x729): undefined reference to `vtable for K3bWritingModeWidget' k3bwritingmodewidget.o:k3bwritingmodewidget.cpp:(.text+0x733): more undefined references to `vtable for K3bWritingModeWidget' follow ./projects/.libs/libprojects.a(k3bdataimagesettingswidget.o): In function `K3bDataImageSettingsWidget::K3bDataImageSettingsWidget(TQWidget*, char const*)': k3bdataimagesettingswidget.cpp:(.text+0x222): undefined reference to `vtable for K3bDataImageSettingsWidget' ./projects/.libs/libprojects.a(k3bdataimagesettingswidget.o): In function `K3bDataImageSettingsWidget::~K3bDataImageSettingsWidget()': k3bdataimagesettingswidget.cpp:(.text+0xe15): undefined reference to `vtable for K3bDataImageSettingsWidget' k3bwelcomewidget.o: In function `K3bWelcomeWidget::~K3bWelcomeWidget()': k3bwelcomewidget.cpp:(.text+0xbb6): undefined reference to `vtable for K3bWelcomeWidget' k3bwelcomewidget.cpp:(.text+0xbbd): undefined reference to `vtable for K3bWelcomeWidget' k3bwelcomewidget.o: In function `K3bWelcomeWidget::Display::Display(K3bWelcomeWidget*)': k3bwelcomewidget.cpp:(.text+0xeca): undefined reference to `vtable for K3bWelcomeWidget::Display' k3bwelcomewidget.cpp:(.text+0xed1): undefined reference to `vtable for K3bWelcomeWidget::Display' k3bwelcomewidget.o: In function `K3bWelcomeWidget::K3bWelcomeWidget(K3bMainWindow*, TQWidget*, char const*)': What is this error? gcc? glibc? TQt3? ffmpeg? What is a vtable? What say the experts? Suggestions what to try next? I've read http://gcc.gnu.org/faq.html#vtables -- still didn't help... -- David C. Rankin, J.D.,P.E.