Cmake在ubuntu 18.04上找不到本地版本的opencv

Question

我有一个版本的 OpenCV ((3.4.1) 编译并安装在 /home/m/locals/opencv

/home/m/locals/opencv 的内容是：

bin
include
lib
share

我有一个指向这个目录的环境：

echo $OPENCV_ROOT
/home/m/locals/opencv

我有一个尝试将 opencv 添加到项目的 cmake：

 file(TO_CMAKE_PATH $ENV{OPENCV_ROOT} OpenCV_DIR)
 set(BUILD_SHARED_LIBS OFF)
 find_package(OpenCV  COMPONENTS core highgui imgproc imgcodecs videoio photo stitching flann ml features2d calib3d objdetect REQUIRED)

当我运行 cmake 时，我收到此错误：

CMake Error at /usr/local/share/OpenCV/OpenCVModules.cmake:399 (message):
The imported target "opencv_core" references the file

     "/usr/local/lib/libopencv_core.so.3.4.0"

   but this file does not exist.  Possible reasons include:

   * The file was deleted, renamed, or moved to another location.

   * An install or uninstall procedure did not complete successfully.

   * The installation package was faulty and contained

      "/usr/local/share/OpenCV/OpenCVModules.cmake"

   but not all the files it references.

我的问题：

1. 为什么它试图找到 OpenbCV 3.4.0，而我安装的是 3.4.1
2. 如何修复它并确保它指向正确的 openCV 副本？

Answer 1

您可以按照export OpenCV_DIR=... 但是，它可能会影响其他需要3.4.0 。 而是在项目的CMakeLists.txt设置变量

set(OpenCV_DIR /home/m/locals/opencv/share/OpenCV)

或者，您可以在运行cmake时手动设置变量：

cmake -D OpenCV_DIR=/home/m/locals/opencv/share/OpenCV ..

Answer 2

我通过完全删除 OpenCV 并从源代码构建它来解决这个问题。 这帮助我在 ubuntu 18.04 中安装了 OpenCV 3.3