Qt 5.2.1 with OpenCV 2.4.9 (MinGW from Qt) win7 cmake - problem with compilation from source

asked 2014-05-08 06:35:26 -0500

volodia gravatar image

updated 2014-05-09 05:41:03 -0500

Hello! Could you tell me please if anybody try to compile with success OpenCV (version upper)?

I combine MinGW 4.4 & Qt 4.7.3 and OCV 2.3.1 with success.

Best regards.

I cannot get througth first one. (all using Win7Pr, cmake

Is it better to compile with VS2013(for example) or MinGW (I know that only with VS you can compile CUDA 3rdPartyLibs) ?

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hi volodia, please edit, and add the usual suspects: cmake output, error stacktrace,...

berak gravatar imageberak ( 2014-05-08 06:38:49 -0500 )edit

And I would like to suggest to use OpenCV 2.4.9 if you are going to build it yourself ... removes alot of problems!

StevenPuttemans gravatar imageStevenPuttemans ( 2014-05-08 08:04:57 -0500 )edit

@berak, ok but tried you? with native MinGW or sth else? See this - nuwen.net/mingw.html minGW "distro" with I want to use in future... If you passed, could you mention the version on which one...

>>>It was sth wrong with my compilation for Qt5 - everything passed, but when starting QtCreator libs were not found<<<

@StevenPuttemans, you DO NOT understand. I compiled OpenCV 2.3.1 with success (mentioned Qt, MinGW or sth)... And I know how to do it correctly

I ASKED if somebody did it ( compilation of OCV 2.4.9 with Qt 5.2.1 on Win7Pro with with SUCCESS...

Could you answer the MENTIONED question?


Best regards. PS if anybody tried and pass I will try to do it on my own...

volodia gravatar imagevolodia ( 2014-05-09 05:35:17 -0500 )edit

volodia, sorry, but got neither mingw, nor qt here. i'm only trying to improve your question.

berak gravatar imageberak ( 2014-05-09 05:47:31 -0500 )edit

@volodia, maybe just getting a better attitude will get you a solution ... seriously it was a suggestion ... you do not have to respond like a complete idiot. I just got mixed info between content and title of this post.

StevenPuttemans gravatar imageStevenPuttemans ( 2014-05-09 06:02:19 -0500 )edit

berak, thanks. StevenPuttemans, I only want to know if anybody done it with MinGW(compiled OpenCV2.4.9 by MinGW with success - OCV which you suggest). Sorry, because I feel that my post make you feel bad.

Next time I try to write as good as I could to be understand by you.

So, have you something to help me with that subject or just increment your post counter?

volodia gravatar imagevolodia ( 2014-05-09 07:55:05 -0500 )edit

Lol? There isn't even a post counter here, not even taken into account the comments. You only get 'karma' by people accepting or upvoting your efforts ... As to your problem, I cannot help you since I am using GCC and linux myself for the moment. However I did succeed in building OpenCV 2.4.8 with MinGW on W7 x64 with QT support for a student last month, so I guess getting 2.4.9 should actually work.

StevenPuttemans gravatar imageStevenPuttemans ( 2014-05-09 08:17:28 -0500 )edit

Do you remember which version of MinGW? 4.7.2 or 4.8.0 ?

Best regards.

volodia gravatar imagevolodia ( 2014-05-09 11:36:36 -0500 )edit

I think it was version 4.7.2

StevenPuttemans gravatar imageStevenPuttemans ( 2014-05-09 11:57:47 -0500 )edit

2 more questions:

1) Could I ignore warings like this? >CMake Warning (dev) in modules/videostab/CMakeLists.txt: Policy CMP0020 is not set: Automatically link Qt executables to qtmain target on Windows. Run "cmake --help-policy CMP0020" for policy details. Use the cmake_policy command to set the policy and suppress this warning. This warning is for project developers. Use -Wno-dev to suppress it. > Make Warning (dev) in modules/highgui/CMakeLists.txt:[...] This warning is for project developers. Use -Wno-dev to suppress it.

2) What should be in CMAKE_PREFIX_PATH if in C:/Qt/5.2.1/ I have only: * VS * mingw48... * android if cmake needs Qt5core...etc_dir but there is no folder with MinGW 472... are qt libs suitable withother between 480 and 472 ver. of MinGW?

volodia gravatar imagevolodia ( 2014-05-10 03:03:59 -0500 )edit