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I was trying to install opencv. And I followed the steps given in this link.
But, after cloning the directories opencv.git and opencv_contrib.git and running the command:

cmake -D BUILD_TIFF=ON -D WITH_CUDA=OFF -D ENABLE_AVX=OFF -D WITH_OPENGL=OFF -D WITH_OPENCL=OFF -D WITH_IPP=OFF -D WITH_TBB=ON -D BUILD_TBB=ON -D WITH_EIGEN=OFF -D WITH_V4L=OFF -D WITH_VTK=OFF -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=/opt/opencv_contrib/modules /opt/opencv/

I get the above error CMakeLists.txt does not appear to exist. What is the solution to this?

Added:I created a new opt folder in home directory which should have been in the root... there was where I made the mistake maybe.

David Foerster
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SolitaryReaper
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    Did you follow the instructions correctly using the same paths and running every command as instructed? Path matters here, so pwd should output /opt/opencv/release. You did execute cmake as root, didn't you? Please answer questions by [edit]ing your post rather than using comments. – dessert Dec 31 '17 at 09:40
  • I created a new opt folder in home directory which should have been in the root... there was where I made the mistake maybe – SolitaryReaper Dec 31 '17 at 13:55
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    Please answer questions by [edit]ing your post rather than using comments. Please add the steps exactly as you followed them. – dessert Dec 31 '17 at 14:01

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