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A workaround: In CMake turn off the following BUILD variables: BUILD_PERF_TESS BUILD_TESTS BUILD_opencv_apps

And the remaining default opencv functionality will compile with mingw4.8.2

This is my first time attempting to compile OpenCV 2.4.10 or 2.4.9 using MinGW 4.8.2 from Qt 5.3 and CMake 3.1.0 under Windows 7 Professional 64 bit.

It fails with a linker error in ts_func.cpp (reproduced in full below). I am assuming it would compile without my needing to edit any source or make files and I have made a mistake somewhere. I would appreciate it if someone who has successfully compiled 2.4.10 with MinGW to verify I am doing this correctly and offer some advice on how to get a successful compile.

Qt was installed as binaries and is able to create a working Hello World app. MinGW was added to the path.

I installed the OpenCV sources via the windows installer.

I installed CMake using the defaults.

I started CMake and selected "specify compilers". I pointed them to the MinGW bin directory with gcc.exe and g++.exe.

I selected the OpenCV source directory and a new OpenCV_bin directory for the output.

I pressed the "Configure" button and had a number of red lines appear on the CMake GUI.

I changed CMAKE_BUILD_TYPE to Release.

I pressed the "configure" button and the red lines turned to white.

I pressed the "generate" button.

I opened a cmd.exe window. I changed to the opencv_bin directory where CMake was to output. I entered >mingw32-make and compilation started.

Here is the error output:

[ 36%] Building CXX object modules/core/CMakeFiles/opencv_test_core.dir/test/tes

t_rand.cpp.obj cc1plus.exe: warning: C:/develop/opencv2410/opencv_bin/modules/core/test_precomp .hpp.gch/opencv_test_core_Debug.gch: not used because __NO_INLINE__' not define d [-Winvalid-pch] Linking CXX executable ..\..\bin\opencv_test_core.exe ../../lib/libopencv_ts2410.a(ts_func.cpp.obj):ts_func.cpp:(.text$_ZN6cvtest9rand omMatERN2cv3RNGERKSt6vectorIiSaIiEEiddb+0x206): undefined reference tocv::Mat: :Mat(cv::Mat const&, cv::Range const)' ../../lib/libopencv_ts2410.a(ts_func.cpp.obj):ts_func.cpp:(.text$_ZN6cvtest16pri ntVersionInfoEb+0x87): undefined reference to cv::getBuildInformation()' C:/Qt/Tools/mingw482_32/bin/../lib/gcc/i686-w64-mingw32/4.8.2/../../../../i686-w 64-mingw32/bin/ld.exe: ../../lib/libopencv_ts2410.a(ts_func.cpp.obj): bad reloc address 0x87 in section.text$_ZN6cvtest16printVersionInfoEb' collect2.exe: error: ld returned 1 exit status modules\core\CMakeFiles\opencv_test_core.dir\build.make:380: recipe for target ' bin/opencv_test_core.exe' failed mingw32-make[2]: [bin/opencv_test_core.exe] Error 1 CMakeFiles\Makefile2:1121: recipe for target 'modules/core/CMakeFiles/opencv_tes t_core.dir/all' failed mingw32-make[1]: [modules/core/CMakeFiles/opencv_test_core.dir/all] Error 2 Makefile:136: recipe for target 'all' failed mingw32-make: ** [all] Error 2

C:\develop\opencv2410\opencv_bin>mingw32-make