6.8.0 fails to build on Debian/Wheezy

gcc (Debian 4.7.2-5) 4.7.2
NVIDIA-SMI 4.304... Driver Version: 304.117
QT-4.8.6
VTK-6.1.0

please see the error at the end... kind of disappointing.

../../../src/Xw -I../../../../../drv/Image -I../../../../../src/Image -I../../../../../drv/Cocoa -I../../../../../src/Cocoa -I../../../../../drv/TColQuantity -I../../../../../src/TColQuantity -I../../../../../drv/Font -I../../../../../src/Font -DNDEBUG -DNo_Exception -DCSFDB -DOCC_CONVERT_SIGNALS -DLIN -DLININTEL -D_GNU_SOURCE=1 -mmmx -msse -msse2 -mfpmath=sse -Wall -O2 -MT Xw_Window.lo -MD -MP -MF .deps/Xw_Window.Tpo -c -o Xw_Window.lo `test -f '../../../../../src/Xw/Xw_Window.cxx' || echo '../../../../../adm/lin/amk/TKService/'`../../../../../src/Xw/Xw_Window.cxx
mv -f .deps/SelectBasics_EntityOwner.Tpo .deps/SelectBasics_EntityOwner.Plo
libtool: compile: g++ -DHAVE_CONFIG_H -I. -I../../../../../adm/lin/amk/TKService -I../../../.. -I/usr/local/lib/include -DHAVE_GL2PS -I/usr/lib/include -DHAVE_FREEIMAGE -I/usr/local/include/vtk-6.1 -DHAVE_VTK -I/usr/include/freetype2 -I../../../../../inc -I../../../../../drv/Aspect -I../../../../../src/Aspect -I../../../../../drv/InterfaceGraphic -I../../../../../src/InterfaceGraphic -I../../../../../drv/SelectBasics -I../../../../../src/SelectBasics -I../../../../../drv/Xw -I../../../../../src/Xw -I../../../../../drv/Image -I../../../../../src/Image -I../../../../../drv/Cocoa -I../../../../../src/Cocoa -I../../../../../drv/TColQuantity -I../../../../../src/TColQuantity -I../../../../../drv/Font -I../../../../../src/Font -DNDEBUG -DNo_Exception -DCSFDB -DOCC_CONVERT_SIGNALS -DLIN -DLININTEL -D_GNU_SOURCE=1 -mmmx -msse -msse2 -mfpmath=sse -Wall -O2 -MT Xw_Window.lo -MD -MP -MF .deps/Xw_Window.Tpo -c ../../../../../src/Xw/Xw_Window.cxx -fPIC -DPIC -o .libs/Xw_Window.o
mv -f .deps/SelectBasics_SensitiveEntity.Tpo .deps/SelectBasics_SensitiveEntity.Plo
mv -f .deps/SelectBasics_SortAlgo.Tpo .deps/SelectBasics_SortAlgo.Plo
../../../../../src/Xw/Xw_Window.cxx:41:1: error: 'Handle_Xw_Window' does not name a type
../../../../../src/Xw/Xw_Window.cxx: In member function 'virtual const Handle_Standard_Type& Xw_Window::DynamicType() const':
../../../../../src/Xw/Xw_Window.cxx:42:1: error: 'Xw_Window_Type_' was not declared in this scope
../../../../../src/Xw/Xw_Window.cxx: At global scope:
../../../../../src/Xw/Xw_Window.cxx:42:1: error: 'Xw_Window_Type_' was not declared in this scope
../../../../../src/Xw/Xw_Window.cxx: In member function 'virtual const Handle_Standard_Type& Xw_Window::DynamicType() const':
../../../../../src/Xw/Xw_Window.cxx:42:1: warning: control reaches end of non-void function [-Wreturn-type]
make[3]: *** [Xw_Window.lo] Error 1
make[3]: Leaving directory `/home/felix/Downloads/opencascade-6.8.0/build/adm/lin/amk/TKService'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/felix/Downloads/opencascade-6.8.0/build/adm/lin/amk'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/felix/Downloads/opencascade-6.8.0/build'
make: *** [all] Error 2