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

[Being friendzoned sucks]

Yeah I fixed the copy thing before using it

but I'm stupid enough to forget about changing the names to the new version names..

anyways they're still some problems

first I added these to my pro file:

INCLUDEPATH += C:/opencv249/build/include/
CONFIG( debug, debug|release ) {
#debug libs
        LIBS +=-LC:/opencv249/build/x64/vc11/staticlib\
        -lopencv_core249d\
        -lopencv_highgui249d
}
else {
#release libs
        LIBS +=-LC:/opencv249/build/x64/vc11/staticlib\
        -lopencv_core249\
        -lopencv_highgui249
}

INCLUDEPATH += C:/opencv249/build/include/
CONFIG( debug, debug|release ) {
#debug libs
        LIBS +=-LC:/opencv249/build/x64/vc11/staticlib\
        -lopencv_core249d\
        -lopencv_highgui249d
}
else {
#release libs
        LIBS +=-LC:/opencv249/build/x64/vc11/staticlib\
        -lopencv_core249\
        -lopencv_highgui249
}

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second here is the includes + code

#include<opencv/cv.h>
#include<opencv/highgui.h>
 
void MainWindow::showimage1(){
    IplImage*img=cvLoadImage("C:\\Users\\myuser\\QT\\build-CaptureTools-Unnamed-Debug\\Fri May 2 2014_3039.png");
    cvNamedWindow("example",CV_WINDOW_AUTOSIZE);
    cvShowImage("example",img);
    cvWaitKey(0);
    cvReleaseImage(&img);
    cvDestroyWindow("example");
 
}

#include<opencv/cv.h>
#include<opencv/highgui.h>

void MainWindow::showimage1(){
    IplImage*img=cvLoadImage("C:\\Users\\myuser\\QT\\build-CaptureTools-Unnamed-Debug\\Fri May 2 2014_3039.png");
    cvNamedWindow("example",CV_WINDOW_AUTOSIZE);
    cvShowImage("example",img);
    cvWaitKey(0);
    cvReleaseImage(&img);
    cvDestroyWindow("example");

}

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------------------------------------------

first I'll start with the notifications that it shows in the issues section along with the errors:

C:\opencv249\build\include\opencv2\flann\logger.h:66: warning: C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
 
C:\opencv249\build\include\opencv2\flann\logger.h:66: warning: C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
 
C:\opencv249\build\include\opencv2\flann\logger.h:66: warning: C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.

C:\opencv249\build\include\opencv2\flann\logger.h:66: warning: C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.

C:\opencv249\build\include\opencv2\flann\logger.h:66: warning: C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.

C:\opencv249\build\include\opencv2\flann\logger.h:66: warning: C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.

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-----------------------------------------------------

the errors:

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvReleaseImage referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)
 
mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvNamedWindow referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)
 
mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvShowImage referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)
 
mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvDestroyWindow referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)
 
mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvLoadImage referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)
 
mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvWaitKey referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)
 
debug\CaptureTools.exe:-1: error: LNK1120: 6 unresolved externals

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvReleaseImage referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvNamedWindow referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvShowImage referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvDestroyWindow referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvLoadImage referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvWaitKey referenced in function "public: void __thiscall MainWindow::showimage1(void)" (?showimage1@MainWindow@@QAEXXZ)

debug\CaptureTools.exe:-1: error: LNK1120: 6 unresolved externals

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[Zlatomir]

Are you trying to build using the same compiler as opencv version? (from the opencv path is seems to be vc11, that means Visual Studio 2012)