解决Cmake报错的问题：Could not find a package configuration file ... OpenCVConfig.cmake，opencv-config.cmake

一个困扰我好几天的问题

CMake Error at CMakeLists.txt:4 (find_package):
  By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "OpenCV", but
  CMake did not find one.

  Could not find a package configuration file provided by "OpenCV" with any
  of the following names:

    OpenCVConfig.cmake
    opencv-config.cmake

  Add the installation prefix of "OpenCV" to CMAKE_PREFIX_PATH or set
  "OpenCV_DIR" to a directory containing one of the above files.  If "OpenCV"
  provides a separate development package or SDK, be sure it has been
  installed.

-- Configuring incomplete, errors occurred!

需要重新安装OpenCV。
参考这篇文章，按步骤安装。
其中cmake部分很久都没安装好，查阅好久资料，用这个命令得到解决：

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D WITH_TBB=ON -D BUILD_TIFF=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_GTK=ON -D WITH_OPENGL=ON ..

来源：https://blog.csdn.net/qq_23923667/article/details/53695114
安装成功之后，可以正常cmake，但是make时又有了新的错误，还未解决。。。