在VM上使用OpenCV重建C ++程序

我需要从ubuntu 20.04切换到Windows 7工作站。

我正在为需要pthread的Raspberry PI编写程序，因此我需要一个Linux测试环境。

我安装了ubuntu 20.04 VM，并重新安装了程序中使用的所有库：

• OpenCV的4.2
• Libtorch
• 数字Cpp

这是我的CMakeLists.txt：

cmake_minimum_required(VERSION 3.15)
project(POC_V4)

set(CMAKE_CXX_STANDARD 14)

# Specifying we are using pthread for UNIX systems.
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS} -pthread -Wall")

find_package(OpenCV REQUIRED)
find_package(Torch REQUIRED)

if(NOT Torch_FOUND)
    message(FATAL_ERROR "Pytorch Not Found!")
endif(NOT Torch_FOUND)

message(STATUS "Pytorch status :")
message(STATUS "    libraries: ${TORCH_LIBRARIES}")

message(STATUS "OpenCV library status :")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    libraries: ${OpenCV_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")

add_executable(POC_V4 <all_my_sources_and_headers>)
target_link_libraries(POC_V4 ${TORCH_LIBRARIES} ${OpenCV_LIBS})
target_link_libraries(POC_V4 pthread dl util)

在真实PC和VM上，cmake输出是相同的：

-- Pytorch status :
--     libraries: torch;torch_library;/usr/lib/libc10.so
-- OpenCV library status :
--     version: 4.2.0
--     libraries: opencv_calib3d;opencv_core;opencv_dnn;opencv_features2d;opencv_flann;opencv_highgui;opencv_imgcodecs;opencv_imgproc;opencv_ml;opencv_objdetect;opencv_photo;opencv_stitching;opencv_video;opencv_videoio;opencv_aruco;opencv_bgsegm;opencv_bioinspired;opencv_ccalib;opencv_datasets;opencv_dnn_objdetect;opencv_dnn_superres;opencv_dpm;opencv_face;opencv_freetype;opencv_fuzzy;opencv_hdf;opencv_hfs;opencv_img_hash;opencv_line_descriptor;opencv_optflow;opencv_phase_unwrapping;opencv_plot;opencv_quality;opencv_reg;opencv_rgbd;opencv_saliency;opencv_shape;opencv_stereo;opencv_structured_light;opencv_superres;opencv_surface_matching;opencv_text;opencv_tracking;opencv_videostab;opencv_viz;opencv_ximgproc;opencv_xobjdetect;opencv_xphoto
--     include path: /usr/include/opencv4
-- Configuring done
-- Generating done
-- Build files have been written to: <path_where_i_build>```

在我真正的Ubuntu PC上，构建可以正常工作，但是在VM上链接期间失败：

/usr/bin/ld: CMakeFiles/POC_V4.dir/src/communication.cpp.o: in function `Communication::showImage(cv::Mat, Box, std::string)':
communication.cpp:(.text+0x208): undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
/usr/bin/ld: CMakeFiles/POC_V4.dir/src/communication.cpp.o: in function `Communication::showImage(cv::Mat, std::string)':
communication.cpp:(.text+0x393): undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
/usr/bin/ld: CMakeFiles/POC_V4.dir/src/communication.cpp.o: in function `Communication::fps(cv::Mat, std::string)':
communication.cpp:(.text+0x655): undefined reference to `cv::putText(cv::_InputOutputArray const&, std::string const&, cv::Point_<int>, int, double, cv::Scalar_<double>, int, int, bool)'
/usr/bin/ld: CMakeFiles/POC_V4.dir/src/communication.cpp.o: in function `Communication::Communication()':
communication.cpp:(.text+0x816): undefined reference to `cv::namedWindow(std::string const&, int)'
/usr/bin/ld: CMakeFiles/POC_V4.dir/src/imageGetter.cpp.o: in function `ImageGetter::ImageGetter()':
imageGetter.cpp:(.text+0x342): undefined reference to `cv::VideoCapture::VideoCapture(std::string const&, int)'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/POC_V4.dir/build.make:285: POC_V4] Error 1
make[1]: *** [CMakeFiles/Makefile2:76: CMakeFiles/POC_V4.dir/all] Error 2

TLDR：

• 相同的操作系统
• 相同的库版本（OpenCV 4.2）
• 相同的CMakeLists.txt文件

OpenCV的链接问题...

有任何想法吗 ？