I'm using OpenCV trunk r7814 Rev. 7814 on Ubuntu 11.10 64bit with Qt 4.8 installed.
During the compilation, i get the following error:

<pre>
Linking CXX executable ../../bin/opencv_perf_core
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QMutex::unlockInternal()'
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QMutex::lockInternal()'
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QRadioButton::minimumSizeHint() const'
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QCheckBox::minimumSizeHint() const'
collect2: ld returned 1 exit status
make[2]: *** [bin/opencv_perf_core] Error 1
make[1]: *** [modules/core/CMakeFiles/opencv_perf_core.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
Linking CXX executable ../../bin/opencv_test_core
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QMutex::unlockInternal()'
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QMutex::lockInternal()'
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QRadioButton::minimumSizeHint() const'
../../lib/libopencv_highgui.so.2.4.0: undefined reference to `QCheckBox::minimumSizeHint() const'
collect2: ld returned 1 exit status
make[2]: *** [bin/opencv_test_core] Error 1
make[1]: *** [modules/core/CMakeFiles/opencv_test_core.dir/all] Error 2
make: *** [all] Error 2
</pre>

Thanks in advance.