c++ - 在 windows10 VS Code 上使用 CMake 对 imread 的 opencv 未定义引用

Question

我想用 CMake 在 VS Code IDE 上运行 OpenCV，但它显示undefined reference to cv::imread(). 我尝试了几种方法（例如编辑 PATH 变量...）来解决问题，但是它仍然可以链接到 opencv 库。

• 这是我的CMakelists.txt

  # cmake needs this line
  cmake_minimum_required(VERSION 2.8)
  
  # Enable C++11
  set(CMAKE_CXX_STANDARD 11)
  set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
  
  # Define project name
  project(cvtest)
  
  # Find OpenCV, you may need to set OpenCV_DIR variable
  # to the absolute path to the directory containing OpenCVConfig.cmake file
  # via the command line or GUI
  find_package(OpenCV REQUIRED)
  
  set(OpenCV_INCLUDE_DIRS "C:/opencv/build/include")
  include_directories(${OpenCV_INCLUDE_DIRS})
  
  # If the package has been found, several variables will
  # be set, you can find the full list with descriptions
  # in the OpenCVConfig.cmake file.
  # Print some message showing some of them
  message(STATUS "OpenCV library status:")
  message(STATUS "    version: ${OpenCV_VERSION}")
  message(STATUS "    libraries: ${OpenCV_LIBS}")
  message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")
  
  # Declare the executable target built from your sources
  add_executable(cvtest cvtest.cpp)
  
  # Link your application with OpenCV libraries
  target_link_libraries(cvtest ${OpenCV_LIBS})
  

• 完成 CMake 设置后，我运行$ cmake -G "MinGW Makefiles".

  -- OpenCV library status:
  --     version: 2.4.13.6
  --     libraries: opencv_videostab;opencv_video;opencv_ts;opencv_superres;opencv_stitching;opencv_photo;opencv_ocl;opencv_objdetect;opencv_nonfree;opencv_ml;opencv_legacy;opencv_imgproc;opencv_highgui;opencv_gpu;opencv_flann;opencv_features2d;opencv_core;opencv_contrib;opencv_calib3d
  --     include path: C:/opencv/build/include
  

• 最后，我运行$ mingw32-make了，但出现了一些错误

  Scanning dependencies of target cvtest
  [ 50%] Building CXX object CMakeFiles/cvtest.dir/cvtest.cpp.obj
  [100%] Linking CXX executable cvtest.exe
  CMakeFiles\cvtest.dir/objects.a(cvtest.cpp.obj):cvtest.cpp:(.text+0x63): 
  undefined reference to cv::imread(std::string const&, int)'
  CMakeFiles\cvtest.dir/objects.a(cvtest.cpp.obj):cvtest.cpp:(.text+0x87): 
  undefined reference to cv::_InputArray::_InputArray(cv::Mat const&)'
  CMakeFiles\cvtest.dir/objects.a(cvtest.cpp.obj):cvtest.cpp:(.text+0xc1): 
  undefined reference to cv::imshow(std::string const&, cv::_InputArray const&)'
  c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: 
  CMakeFiles\cvtest.dir/objects.a(cvtest.cpp.obj): bad reloc address 0xf in section `.text$_ZN2cv3MatD1Ev[__ZN2cv3MatD1Ev]'
  c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: 
  final link failed: Invalid operation
  collect2.exe: error: ld returned 1 exit status
  CMakeFiles\cvtest.dir\build.make:104: recipe for target 'cvtest.exe' failed
  mingw32-make[2]: *** [cvtest.exe] Error 1
  CMakeFiles\Makefile2:71: recipe for target 'CMakeFiles/cvtest.dir/all' failed
  mingw32-make[1]: *** [CMakeFiles/cvtest.dir/all] Error 2
  Makefile:82: recipe for target 'all' failed
  mingw32-make: *** [all] Error 2
  

• 这是cvtest.cpp

  #include <cstdio>
  #include <iostream>
  #include <opencv2/opencv.hpp>
  
  using namespace cv;
  using namespace std;
  
  int main(int argc, char *argv[]) {
      Mat img = imread("lena.bmp", CV_LOAD_IMAGE_COLOR);
      imshow("lena", img);
  }
  

---

我是否误解了我应该知道的事情，我该如何纠正？谢谢 ！

标签： c++windowsopencvcmakevisual-studio-code