LinuxQuestions.org - Debian unstable and KDE3.2 installation

I am trying to install KDE3.2 thorough their Konstruct, but I am still giving an error:

This is the Qt/X11 Free Edition.

You are licensed to use this software under the terms of either
the Q Public License (QPL) or the GNU General Public License (GPL).

Type 'Q' to view the Q Public License.
Type 'G' to view the GNU General Public License.
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Creating qmake. Please wait...
make[5]: Entering directory `/download/konstruct/libs/qt-x11-free/work/qt-x11-free-3.2.3/qmake'
g++ -c -o project.o -I. -Igenerators -Igenerators/unix -Igenerators/win32 -Igenerators/mac -I/download/konstruct/libs/qt-x11-free/work/qt-x11-free-3.2.3/include/qmake -I/download/konstruct/libs/qt-x11-free/work/qt-x11-free-3.2.3/include -I/download/konstruct/libs/qt-x11-free/work/qt-x11-free-3.2.3/include -DQT_NO_TEXTCODEC -DQT_NO_UNICODETABLES -DQT_NO_COMPONENT -DQT_NO_STL -DQT_NO_COMPRESS -I/download/konstruct/libs/qt-x11-free/work/qt-x11-free-3.2.3/mkspecs/linux-g++ -DHAVE_QCONFIG_CPP project.cpp
make[5]: g++: Command not found
make[5]: *** [project.o] Error 127
make[5]: Leaving directory `/download/konstruct/libs/qt-x11-free/work/qt-x11-free-3.2.3/qmake'
qmake failed to build. Aborting.
make[4]: *** [configure-work/qt-x11-free-3.2.3/configure] Error 2
make[4]: Leaving directory `/download/konstruct/libs/qt-x11-free'
make[3]: *** [dep-../../libs/qt-x11-free] Error 2
make[3]: Leaving directory `/download/konstruct/libs/arts'
make[2]: *** [dep-../../libs/arts] Error 2
make[2]: Leaving directory `/download/konstruct/kde/kdelibs'
make[1]: *** [dep-../../kde/kdelibs] Error 2
make[1]: Leaving directory `/download/konstruct/kde/kdebase'
make: *** [dep-../../kde/kdebase] Error 2
laptop:/download/konstruct/meta/everything#

I am running debian unstable and I would like to run kde3.2, so what should I do to avoid that problem? now I am running kde 3.1x. Thanks a lot.