Question

出于测试目的，我需要使用静态库编译C ++ opencv程序。我的cmake构建选项为：

    -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D BUILD_DOCS=OFF \
    -D BUILD_EXAMPLES=OFF \
    -D BUILD_opencv_apps=OFF \
    -D BUILD_opencv_python2=ON \
    -D BUILD_opencv_python3=ON \
    -D BUILD_PERF_TESTS=OFF \
    -D BUILD_SHARED_LIBS=OFF \ 
    -D BUILD_TESTS=OFF \
    -D ENABLE_PRECOMPILED_HEADERS=OFF\
    -D FORCE_VTK=OFF \
    -D WITH_FFMPEG=OFF \
    -D WITH_GDAL=OFF \ 
    -D WITH_IPP=OFF \
    -D WITH_OPENEXR=OFF \
    -D WITH_OPENGL=OFF \ 
    -D WITH_QT=OFF\
    -D WITH_TBB=OFF \ 
    -D WITH_XINE=OFF \ 
    -D BUILD_JPEG=ON  \
    -D BUILD_TIFF=ON \
    -D BUILD_PNG=ON \

我可以看到/usr/local/libs/ and the headers in /usr/local/include/中都有文件。并且我有测试程序来显示使用highgui, core and imgcodec libs的图像。读取类似的问题/线程我尝试使用以下命令编译程序：构建顺序至关重要：

    g++ main.cpp -I /usr/local/include/opencv4 -L /usr/local/lib 
    -L /usr/local/share/opencv4 -L /usr/local/lib/opencv4 -lopencv_highgui \
    -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_highgui \
    -lopencv_ml -lopencv_objdetect -lopencv_photo -lopencv_stitching \
    -lopencv_video -lopencv_imgproc -lopencv_core -ljpeg -lpng -ltiff -lrt \
    -lz -lpthread -o binary

但是它只会吐出许多错误，例如：

    usr/local/lib/libopencv_highgui.a(window_gtk.cpp.o): In function `icvOnKeyPress(_GtkWidget*, _GdkEventKey*, void*)':window_gtk.cpp:(.text._ZL13icvOnKeyPressP10_GtkWidgetP12_GdkEventKeyPv+0x98): undefined reference to `g_mutex_lock'
    window_gtk.cpp:(.text._ZL13icvOnKeyPressP10_GtkWidgetP12_GdkEventKeyPv+0xaa): undefined reference to `g_cond_broadcast'
    window_gtk.cpp:(.text._ZL13icvOnKeyPressP10_GtkWidgetP12_GdkEventKeyPv+0xb6): undefined reference to `g_mutex_unlock'/usr/local/lib/libopencv_highgui.a(window_gtk.cpp.o): In function `cvImageWidgetSetImage(_CvImageWidget*, void const*)':
    window_gtk.cpp:(.text._Z21cvImageWidgetSetImageP14_CvImageWidgetPKv+0x185): undefined reference to `gtk_widget_get_type' /usr/local/lib/libopencv_core.a(opencl_core.cpp.o): In function `OPENCL_FN_clGetExtensionFunctionAddress_switch_fn(char const*)':
opencl_core.cpp:(.text._ZL49OPENCL_FN_clGetExtensionFunctionAddress_switch_fnPKc+0x33): undefined reference to `dlsym'
opencl_core.cpp:(.text._ZL49OPENCL_FN_clGetExtensionFunctionAddress_switch_fnPKc+0x19c): undefined reference to `dlopen'
opencl_core.cpp:(.text._ZL49OPENCL_FN_clGetExtensionFunctionAddress_switch_fnPKc+0x1b3): undefined reference to `dlsym'
opencl_core.cpp:(.text._ZL49OPENCL_FN_clGetExtensionFunctionAddress_switch_fnPKc+0x296): undefined reference to `dlclose'

显然OpenCV4.已使用pkgconfig 无论如何，有没有找到所需的库以及使用静态库进行构建的正确顺序？

更新：现在，修复脚本后，我只有几个错误 使用以下内容：

g++ main.cpp -I /usr/local/include/opencv4 -L/usr/local/lib -lopencv_dnn -lopencv_features2d -lopencv_calib3d -lopencv_flann -lopencv_objdetect -lopencv_ml -lopencv_photo -lopencv_video -lopencv_videoio -lopencv_highgui -lopencv_imgcodecs -lopencv_imgproc -lopencv_core -lpng -ljpeg -o binary

我现在只有：

/usr/bin/ld: /usr/local/lib/libopencv_core.a(persistence.cpp.o): undefined reference to symbol 'gzeof'
//lib/x86_64-linux-gnu/libz.so.1: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

Answer 1

在到处搜索后确定。我终于做到了。我正在使用docker容器作为我的工作环境。我正在使用OpenCV 4.0.1和Ubuntu 18.04。我的docker文件位于DockerFile。（docker镜像仍是动态构建的，只需按照以下步骤启用静态构建即可。）

要成功成功进行静态编译，基本上有两件事要做。

-D BUILD_SHARED_LIBS=OFF

AND
-D OPENCV_GENERATE_PKGCONFIG=YES

第二个选项将避免您在编译过程中手动链接所有库的麻烦。这非常关键。编译时我只使用了典型的：

g++ main.cpp -o test `pkg-config --cflags --libs --static opencv4`

只记得将$ PKG_CONFIG_PATH设置为opencv4.pc所在的位置。我通过以下方式设置我的位置：

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

您可以通过以下方式进行检查：echo $PKG_CONFIG_PATH 我希望这可以帮助任何努力做到这一点的人！

编辑：** Dockerfile

如何编译静态OpenCV4库？

1 个答案: