gnupic: Thread: Ktechlab failed to be built under Ubuntu 6.06 LTS AMD64

I have problems to built the latest Ktechlab svn version under Ubuntu 6.06
LTS AMD64 version. Gpsim is also of the lates svn version. What could be
the problem?

mcuee@ubuntu64:~/Desktop/build/ktechlab/trunk$ uname -a Linux ubuntu64
2.6.15-25-amd64-generic #1 SMP PREEMPT Wed Jun 14 11:28:03
UTC 2006 x86_64 GNU/Linux

mcuee@ubuntu64:~/Desktop/build/ktechlab/trunk$ gpsim -v

gpsim - the GNUPIC simulator
version: Release 0.21.12-pre


type help for help
Release 0.21.12-pre
**gpsim> SimulationMode:52

mcuee@ubuntu64:~/Desktop/build/ktechlab/trunk$ make
...
...
make[3]: Leaving directory
`/home/mcuee/Desktop/build/ktechlab/trunk/src/contexthelp'
make[3]: Entering directory `/home/mcuee/Desktop/build/ktechlab/trunk/src'
/bin/sh ../libtool --silent --tag=CXX --mode=link g++  -Wno-long-long
-Wundef -ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align
-Wconversion -Wchar-subscripts -Wall -W -Wpointer-arith -g3
-fno-inline -Wformat-security -Wmissing-format-attribute
-Wno-non-virtual-dtor -fno-exceptions -fno-check-new -fno-common
-fexceptions    -o ktechlab -module -L/usr/lib -L/usr/share/qt3/lib
-L/usr/X11R6/lib    -R /usr/lib -R /usr/lib -R /usr/share/qt3/lib -R
/usr/X11R6/lib ktechlab.o node.o connector.o itemlibrary.o
libraryitem.o projectmanager.o picitem.o variant.o canvasitemparts.o
flowcontainer.o microsettings.o fpnode.o cells.o asmformatter.o
conrouter.o nodegroup.o canvasmanipulator.o iteminterface.o
itemgroup.o ciwidgetmgr.o filemetainfo.o resizeoverlay.o document.o
view.o docmanager.o cnitem.o item.o cnitemgroup.o itemview.o
itemdocument.o textview.o textdocument.o circuitdocument.o
flowcodedocument.o icnview.o icndocument.o viewcontainer.o
circuitview.o flowcodeview.o eventinfo.o oscilloscopedata.o
itemdocumentdata.o docmanageriface.o documentiface.o viewiface.o
simulator.o katemdi.o debugmanager.o recentfilesaction.o
variablelabel.o canvas.o docmanageriface_skel.o viewiface_skel.o
documentiface_skel.o oscilloscopedata.moc.o canvas.moc.o
microsettings.moc.o  ../src/gui/libgui.la ../src/micro/libmicro.la
../src/flowparts/libflowparts.la ../src/mechanics/libmechanics.la
../src/electronics/libelectronics.la
../src/electronics/simulation/libelements.la
../src/electronics/components/libcomponents.la
../src/languages/liblanguages.la ../src/drawparts/libdrawparts.la
../src/core/libcore.la ../src/gui/itemeditor/libitemeditor.la -lkhtml
-lkutils -lreadline -lgpsim -lgpsim_eXdbm -lgpsimcli -lktexteditor
-lkio -lkdeprint
../src/electronics/.libs/libelectronics.a(gpsimprocessor.o): In
function `GpsimDebugger::initAddressToLineMap()':/home/mcuee/Desktop/build/ktechlab/trunk/src/electronics/gpsimprocessor.cpp:570:
undefined reference to `FileContext::max_line()'
../src/electronics/.libs/libelectronics.a(piccomponentpin.o):(.gnu.linkonce.d._ZTV15PICComponentPin[vtable
for PICComponentPin]+0x50): undefined reference to
`gpsimObject::description()'
../src/electronics/.libs/libelectronics.a(piccomponentpin.o):(.gnu.linkonce.d._ZTV15PICComponentPin[vtable
for PICComponentPin]+0x60): undefined reference to
`gpsimObject::set_break(gpsimObject::ObjectBreakTypes, Expression*)'
../src/electronics/.libs/libelectronics.a(piccomponentpin.o):(.gnu.linkonce.d._ZTV15PICComponentPin[vtable
for PICComponentPin]+0x68): undefined reference to
`gpsimObject::clear_break()'
../src/electronics/.libs/libelectronics.a(piccomponentpin.o):(.gnu.linkonce.d._ZTV15PICComponentPin[vtable
for PICComponentPin]+0xd8): undefined reference to
`stimulus::getThevenin(double&, double&, double&)'
collect2: ld returned 1 exit status
make[3]: [ktechlab] Error 1 (ignored)

Regards,
Xiaofan