Compiler Error: declared as a `virtual' field, expected `;' before '(' token

[niko]

I'm trying to compile my PetManager (posted allready some time ago on win32) - now on Linux, and i get this error:

g++ -c -pipe -g -Wall -W -D_REENTRANT  -DQT_XML_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/doc/qt-4.1.1/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I. -I../libs/dataobjects -I. -I. -o ObjectFactory.o ObjectFactory.cpp
In file included from ObjectFactory.h:3,
                 from ObjectFactory.cpp:1:
../libs/dataobjects/abstractfactory.h:14: error: `newObject' declared as a `virtual' field
../libs/dataobjects/abstractfactory.h:14: error: expected `;' before '(' token

g++ -c -pipe -g -Wall -W -D_REENTRANT  -DQT_XML_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/doc/qt-4.1.1/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I. -I../libs/dataobjects -I. -I. -o ObjectFactory.o ObjectFactory.cpp
In file included from ObjectFactory.h:3,
                 from ObjectFactory.cpp:1:
../libs/dataobjects/abstractfactory.h:14: error: `newObject' declared as a `virtual' field
../libs/dataobjects/abstractfactory.h:14: error: expected `;' before '(' token

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what does that mean?

I attached the sources of the library i use and of the application.

to compile do this:

unpack attached file
export CPPLIBS=absolutepath to libs-dir (used by qmake-scripts)
cd libs
qmake
make
cd ..
cd PetManager
qmake
make

unpack attached file
export CPPLIBS=absolutepath to libs-dir (used by qmake-scripts)
cd libs
qmake
make
cd ..
cd PetManager
qmake
make

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thanks!!