Couldn't link opencv with qt creator , this error happens

[Being friendzoned sucks]

The -l lib name option needs to be on the same line as the -L so you need a \, and also the debug/release are not supposed to be linked together, so the syntax should become something like:

CONFIG( debug, debug|release ) {
#debug libs
        LIBS += -LLIBS +=-LC:/opencv/build/x86/vc11/staticlib\
        -lopencv_core246d\
        -lopencv_highgui246d
}
else {
#release libs
        LIBS += -LLIBS +=-LC:/opencv/build/x86/vc11/staticlib\
        -lopencv_core246\
        -lopencv_highgui246
}

CONFIG( debug, debug|release ) {
#debug libs
        LIBS += -LLIBS +=-LC:/opencv/build/x86/vc11/staticlib\
        -lopencv_core246d\
        -lopencv_highgui246d
}
else {
#release libs
        LIBS += -LLIBS +=-LC:/opencv/build/x86/vc11/staticlib\
        -lopencv_core246\
        -lopencv_highgui246
}

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well thanks buddy , now I have a new problem:

LNK1181: cannot open input file 'opencv_core246.lib'

when I compile in release mode and when I compile in debug mode it shows the same problem except for the debug file:

LNK1181: cannot open input file 'opencv_core246d.lib'