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I can not build OpenCV3.1.0 with FreeBSD11.1.

unzip opencv-3.1.0.zip
 git clone https://github.com/opencv/opencv_contrib
 cd opencv-3.1.0
 mkdir build
 cd build cmake -D CMAKE_BUILD_TYPE=RELEASE -D
 CMAKE_INSTALL_PREFIX=/usr/local -D
 OPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules ..

An error occurred when executing the above command.

Error Statement CMake Error at samples/gpu/CMakeLists.txt:100 (list):

Configuring incomplete, errors occurred! See also "/home/user/support/src/opencv/opencv-3.1.0/build/CMakeFiles/CMakeOutput.log". See also "/home/user/support/src/opencv/opencv-3.1.0/build/CMakeFiles/CMakeError.log".

list sub-command REMOVE_ITEM requires list to be present.