Problem with QtCreator + OpenCV

[rastru]

No, I am not sure, I tested 10 000 things, but if I put

LIBS += -lcv

LIBS += -lcv

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I get the following error:

Running build steps for project Qt...
Configuration unchanged, skipping qmake step.
Starting: "/usr/bin/make" -w 
make: Entering directory `/Users/Laura/Desktop/VC/Qt-build-desktop' 
g++ -headerpad_max_install_names -arch i386 -o Qt.app/Contents/MacOS/Qt main.o mainwindow.o moc_mainwindow.o -F/Library/Frameworks -L/Library/Frameworks -lcv -framework QtGui -framework QtCore 
ld: warning: in /usr/lib/libcv.dylib, file was built for unsupported file format which is not the architecture being linked (i386) 
Undefined symbols: 
"cv::fastFree(void*)", referenced from: 
cv::Mat::release() in main.o 
ld: symbol(s) not found 
collect2: ld returned 1 exit status 
make: *** [Qt.app/Contents/MacOS/Qt] Error 1 
make: Leaving directory `/Users/Laura/Desktop/VC/Qt-build-desktop' 
The process "/usr/bin/make" exited with code %2.
Error while building project Qt (target: Desktop)
When executing build step 'Make'

Running build steps for project Qt...
Configuration unchanged, skipping qmake step.
Starting: "/usr/bin/make" -w 
make: Entering directory `/Users/Laura/Desktop/VC/Qt-build-desktop' 
g++ -headerpad_max_install_names -arch i386 -o Qt.app/Contents/MacOS/Qt main.o mainwindow.o moc_mainwindow.o -F/Library/Frameworks -L/Library/Frameworks -lcv -framework QtGui -framework QtCore 
ld: warning: in /usr/lib/libcv.dylib, file was built for unsupported file format which is not the architecture being linked (i386) 
Undefined symbols: 
"cv::fastFree(void*)", referenced from: 
cv::Mat::release() in main.o 
ld: symbol(s) not found 
collect2: ld returned 1 exit status 
make: *** [Qt.app/Contents/MacOS/Qt] Error 1 
make: Leaving directory `/Users/Laura/Desktop/VC/Qt-build-desktop' 
The process "/usr/bin/make" exited with code %2.
Error while building project Qt (target: Desktop)
When executing build step 'Make'

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and -lcv210 not find it (I have installed opencv2.1)

[Rida]

Hello,
Hello:
I faced the same problem while trying to use OpenCv library with Qt!
I am using:
1) OpenCv2.0
2) Qt Creator 2.01 Based on Qt 4.7.0 (32 bit)
3) Windows Xp

So I solved the problem by adding the following tags in the .pro file:

LIBS += -L C:\OpenCV2.0\bin -lcxcore200 -lcv200 -lcvaux200 -lhighgui200 -lml200 -lcxts200
INCLUDEPATH += C:/OpenCV2.0/include/opencv

Hope this will work