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POOpenCV 2.3 - undefined reference to cvCreateButton - Eclipse
 

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  1. POOpenCV 2.3 - undefined reference to cvCreateButton - Eclipse
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    <p>I am trying to use the Qt new functions described here: <a href="http://opencv.willowgarage.com/documentation/cpp/qt_new_functions.html#cv-createbutton" rel="nofollow noreferrer">http://opencv.willowgarage.com/documentation/cpp/qt_new_functions.html#cv-createbutton</a></p> <p>And I also found this topic on SO: <a href="https://stackoverflow.com/questions/4458668/opencv-2-2-createbutton-lnk-2019-error-in-visual-studio-2010">openCV 2.2 createButton LNK 2019 error in Visual Studio 2010</a> but compiling with QT didn't work.</p> <p>Anyway, according to my searches it seems to be a linking problem. My doubt is that I already compiled OpenCV (without QT) but I can use the createTrackbar normally.</p> <p>I tried using the createButton as this:</p> <pre><code>cv::createButton("buttonCanny", buttonCallBackCanny,NULL,CV_RADIOBOX,true); </code></pre> <p>But I get this error:</p> <blockquote> <p>undefined reference to `cv::createButton(std::string const&amp;, void (<em>)(int, void</em>), void*, int, bool)'</p> </blockquote> <p>I tried the cvCreateButton but I get the same error.</p> <p>I have this setup C/C++ Build -> Settings -> Tool Settings -> MingGW C++ Linker -> Libraries (all the .dll from compiled OpenCV)</p> <ul> <li>libopencv_calib3d230 </li> <li>opencv_ffmpeg </li> <li>libopencv_contrib230</li> <li>libopencv_core230 </li> <li>libopencv_features2d230 </li> <li>libopencv_flann230</li> <li>libopencv_gpu230 </li> <li>libopencv_highgui230 </li> <li>libopencv_imgproc230</li> <li>libopencv_legacy230 </li> <li>libopencv_ml230 </li> <li>libopencv_objdetect230</li> <li>libopencv_video230</li> </ul> <p>C/C++ Build -> Settings -> Tool Settings -> MingGW C++ Linker -> Search Path ("C:\opencvbin\bin" where the Dll are)</p> <p>C/C++ Build -> Settings -> Tool Settings -> GCC C++ Compiler -> Includes "C:\OpenCV2.3\build\include"</p> <p>Any suggestions?</p> <p>Thank you!</p>
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    1. USmrcaramori
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    1. CODo you also added the Qt DLLs to the project?
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      1. POOpenCV 2.3 - undefined reference to cvCreateButton - Eclipse
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    2. CO@borges ok, I added the wrong library, I forgot about C:\QtSDK\QtCreator\bin.. do you know what libraries should I add?
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