Recently, cmake encountered the following problems when compiling a C + + open source project configured with OpenCV environment:

CMake Warning at D:/opencv4/OpenCVConfig.cmake:176 (message):
  Found OpenCV Windows Pack but it has no binaries compatible with your
  configuration.

  You should manually point CMake variable OpenCV_DIR to your build of OpenCV
  library.
Call Stack (most recent call first):
  CMakeLists.txt:13 (find_package)


CMake Error at CMakeLists.txt:13 (find_package):
  Found package configuration file:

    D:/opencv4/OpenCVConfig.cmake

  but it set OpenCV_FOUND to FALSE so package "OpenCV" is considered to be
  NOT FOUND.

So I checked all the methods online, which are basically divided into two categories: one is to modify cmakeLis.txt document. The other is to change the OpenCV version or vs version. But They are not working for me. Finally, I accidentally found that x64 was not selected in configure, and x86 was selected by default. After x64 was selected, the compilation was successful.