The library is compiled without QT support in function displayOverlay

asked 2015-04-21 02:31:43 -0500

Liimyd gravatar image

updated 2015-04-21 02:33:22 -0500

I am using static OpenCV 3.0 libraries with Qt 5.4. I am having compilation errors about cv::displayOverlay():

OpenCV Error: The function/feature is not implemented (The library is compiled without QT support) in displayOverlay, file C:\Programs\opencv\sources\modules\highgui\src\window.cpp, line 446
terminate called after throwing an instance of 'cv::Exception'
  what():  C:\Programs\opencv\sources\modules\highgui\src\window.cpp:446: error: (-213) The library is compiled without QT support in function displayOverlay


undefined reference to `_imp___ZN7QWidgetD2Ev'

Could it be that I am missing a static library? As a note, I compiled OpenCV myself and have made sure that WITH_QT was checked. I have no problems when using the dynamic libraries.

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Actually that means that you added the with_QT option but that CMAKE didn't succeed in finding the complete QT installation itself. Run the CMAKE-gui interface, press configure and look which paths he doesn't find, then configure them manually.

StevenPuttemans gravatar imageStevenPuttemans ( 2015-04-21 02:34:29 -0500 )edit

try a cerr << cv::getBuildInformation(); to check, if qt support was actually compiled in.

berak gravatar imageberak ( 2015-04-21 02:37:37 -0500 )edit

I checked my CMAKE paths and I believe they were correct. This is my full compilation error:

C:/Qt/Tools/mingw491_32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bin/ld.exe: C:\Programs\opencvMinGW\install\x64\mingw\staticlib\libopencv_highgui300.a(window_QT.cpp.obj): bad reloc address 0x15 in section `.text$_ZN10CvWinModelD0Ev[__ZN10CvWinModelD0Ev]'

I noticed that there was a CvWinModel class in window_QT.h but it doesn't help me much. This error is so cryptic and I've looked everywhere. I am not sure what else I can try. Any help would be really appreciated!

Liimyd gravatar imageLiimyd ( 2015-04-23 23:30:05 -0500 )edit

Did you run the code from @berak? If so what was the output?

StevenPuttemans gravatar imageStevenPuttemans ( 2015-04-24 02:26:11 -0500 )edit

i must say, i'm confused now.

  • "OpenCV Error: The function/feature is not implemented" - this is a runtime error. this means, that the program must have compiled and linked at some stage before.

  • "undefined reference to `_imp___ZN7QWidgetD2Ev'" - this is a linker error, no program will be built.

  • "bad reloc address 0x15 in section" - again, a linker error.
berak gravatar imageberak ( 2015-04-24 02:33:27 -0500 )edit

@berak, sorry for the confusion! I had "OpenCV Error: The function/feature is not implemented" before I recompiled openCV. After recompiling OpenCV using WITH_QT = ON, I only had the linker error.

@StevenPuttemans Because of the linker errors, I haven't been able to enter runtime mode so I can't yet run cerr << cv::getBuildInformation();.

Liimyd gravatar imageLiimyd ( 2015-04-24 21:25:18 -0500 )edit

where to use the WITH_QT=ON option? @Liimyd

2ros0 gravatar image2ros0 ( 2018-02-05 20:55:56 -0500 )edit