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manually specified variables were not used: BUILD_opencv_python2

Hello

I am trying to build openCV2.4 (I need that specific version) from source and write python with it. However when I use this flage when executing cmake

-DBUILD_opencv_python2=ON

I get this error: "manually specified variables were not used: -D BUILD_opencv_python2"

Also I would like to know what path exactly needs to be passed to this flag: -D CMAKE_INSTALL_PREFIX I saw different things online for this.

Thanks!

manually specified variables were not used: BUILD_opencv_python2

Hello

I am trying to build openCV2.4 (I need that specific version) from source and write python with it. However when I use this flage when executing cmake

-DBUILD_opencv_python2=ON

I get this error: "manually specified variables were not used: -D BUILD_opencv_python2"

Also I would like to know what path exactly needs to be passed to this flag: -D CMAKE_INSTALL_PREFIX I saw different things online for this.

Thanks!