A installation problem of OpenCV[SOLVED]

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I face a problem when installing OpenCV 4.0 after building OpenCV, which is stated as follows:

Install the project...

-- Install configuration: "Release" CMake Error at cmake_install.cmake:41 (file): file INSTALL cannot find "/home/user/OpenCV/opencv/build/3rdparty/ippicv/ippicv_lnx/icv/readme.htm".

Makefile:73: recipe for target 'install' failed make: * [install] Error 1

The OpenCV cannot be installed, which shows that I missed the ippicv files. I downloaded the ippicv file from the official website (https://github.com/opencv/opencv_3rdp...),

and extract the file to /home/user/OpenCV/opencv_contrib/modules. Besides, I changed the path in /home/user/OpenCV/opencv/3rdparty/ippicv/ippicv.cmake from "https://raw.githubusercontent.com/ope..." to "/home/user/OpenCV/opencv_contrib/modules/ippicv/"

After replacing the files and changing path, I still face the problem which shows that the file is likely to be missed. Please help.