OpenCV 3.0 videoio error

Question

I tried to compile OpenCV 3.0 alpha library for Qt Creator 5.4 with CMake 3.1.0, but I have error:

[ 44%] Building CXX object modules/videoio/CMakeFiles/open         


        

Answer 1

I just ran into the same issue when compiling opencv3.0.0 on windows with mingw. I found a solutions following this link.

Go in the repository where opencv sources are located.

For me it was "C:/opencv/sources/".

Go to the "Cmake/" folder and search for the file named "OpenCVCompilerOptions.cmake"

You just comment the line :

add_extra_compiler_option(-Werror=non-virtual-dtor)

So it should become

#add_extra_compiler_option(-Werror=non-virtual-dtor)

Now, you're good to configure and generate the makefile with cmake, the mingw32-make command line should work fine.