无法用 OpenCV 编译 c++ 程序。 OpenCVConfig.cmake 文件丢失

Question

Tried to run my simple cpp program from CLion and also from terminal, but everywhere have the same problem:

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. 

---

Tried some solutions, but nothing helped. OpenCV is installed into user directory on macOS. Could someone help me?

Answer 1

I had a similar issue with CLion in Windows when I tried to run a program I wrote on a different system. To fix the problem I had to "Import Project from Sources" so that CLion would generate all the necessary files for Make.

I imported the existing program through the dialog box that popped up after I Imported.

This was my simple GCD c++ terminal program before I imported the repo the way CLion required me to:

After I chose import CLion generated all the files necessary to compile locally:

I hope this helps, once I got my program imported CLion did everything else. I modified my CMakeList.txt file for c++11 because I need to know my programs compile as expected on 11. CLion defaulted to c++14 for my.

Answer 2

The error message clearly states, what to do to resolve it: First, find where one of the mentioned files ( OpenCVConfig.cmake or opencv-config.cmake ) is located on your system. This path will be /path/to/configfile . Then set the OpenCV_DIR variable accordingly.

Setting the variable can be done in two ways:

• command line: cmake -DOpenCV_DIR=</path/to/configfile> <any additional arguments>
• CLion settings: See images below (taken from a previous post ). But instead of -DENABLE_TESTS=ON add -DOpenCV_DIR=</path/to/configfile> to CMake options:

Answer 3

As the error message says:

  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.

So look for the file OpenCVConfig.cmake and in your CMakeLists.txt file set the variable OpenCV_DIR to the directory containing the OpenCVConfig.cmake file.

In my case I had installed opencv from the source. The directory where I had installed opencv had the following structure

opencv-installation-directory/
  - bin/
  - include/
  - lib/
  - share/
    - OpenCV/
      - OpenCVConfig.cmake

So I added the following line to CMakeLists.txt :

set(OpenCV_DIR opencv-installation-directory/share/OpenCV)