libopencv_calib3d:对`std :: __ throw_out_of_range_fmt(char const *，…)@ GLIBCXX_3.4.20'的未定义引用 [英] libopencv_calib3d: undefined reference to `std::__throw_out_of_range_fmt(char const*, …)@GLIBCXX_3.4.20'

问题描述

我提到此来安装OpenCV在我的Raspberry Pi 2(在最新的Raspbian内核版本4.1.7-v7上运行)上运行.由于存在依赖项错误，我无法安装libgtk2.0-dev，但没有任何错误，我能够安装OpenCV.

I referred to this to install OpenCV on my Raspberry Pi 2 (which is running on the latest Raspbian with kernel release 4.1.7-v7). I was not able to install libgtk2.0-dev due to dependency errors but I was able to install OpenCV without any errors.

我正在尝试为我的Raspberry Pi 2在Qt中交叉编译一些简单的OpenCV代码.但是在链接器阶段出现以下错误:

I am trying to cross-compile some simple OpenCV code in Qt for my Raspberry Pi 2. But I am getting the following error at linker stage:

/usr/local/lib/libopencv_calib3d.so: undefined reference to
std::__throw_out_of_range_fmt(char const*, ...)@GLIBCXX_3.4.20

我的代码是:

myFunc {
    VideoCapture cap(0);
    if (!cap.isOpened()) {
        qDebug() << "Cannot open the video cam";
        return;
    }

    double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH);
    double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT);
    qDebug() << "Frame size : " << dWidth << " x " << dHeight;
    namedWindow("MyVideo",CV_WINDOW_AUTOSIZE);

    while (1) {
        Mat frame;
        bool bSuccess = cap.read(frame);

         if (!bSuccess) {
             qDebug() << "Cannot read a frame from video stream";
             break;
         }

         imshow("MyVideo", frame);

         if (/*condition*/) {
            break; 
         }
    }
}

我尝试更改链接库的顺序.但是错误仍然存​​在.我的.pro文件看起来是这样的:

I tried changing the order in which the libraries are linked. But the error still remains. My .pro file looks this:

QT       += core gui quick xml widgets
TARGET = myApp
TEMPLATE = app

    QMAKE_CXXFLAGS += -I/mnt/rasp-pi-rootfs/usr/include \
                      -I/mnt/rasp-pi-rootfs/usr/include/libxml2 \
                      -I/mnt/rasp-pi-rootfs/usr/include/glib-2.0/glib \
                      -I/mnt/rasp-pi-rootfs/usr/include/glib-2.0 \
                      -I/mnt/rasp-pi-rootfs/usr/lib/arm-linux-gnueabihf/glib-2.0 \
                      -I/mnt/rasp-pi-rootfs/usr/lib/arm-linux-gnueabihf/glib-2.0/include \
                      -I/mnt/rasp-pi-rootfs/usr/include/gstreamer-1.0 \
                      -I/mnt/rasp-pi-rootfs/usr/local/include \

    QMAKE_CXXFLAGS += -Wno-psabi

    QMAKE_LIBDIR_FLAGS += -L/mnt/rasp-pi-rootfs/usr/lib \
                          -L/mnt/rasp-pi-rootfs/lib \
                          -L/mnt/rasp-pi-rootfs/usr/local/lib \

    QMAKE_LFLAGS   += -lgmodule-2.0 \
                      -lz \
                      -lxml2 \
                      -lgthread-2.0 \
                      -lrt \
                      -lglib-2.0 \
                      -lpthread \
                      -lgstreamer-1.0 \
                      -lgobject-2.0 \
                      -lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_objdetect -lopencv_ts -lopencv_video \

SOURCES += /* all .cpp files */

HEADERS += /* all .h files */

我该如何解决?

更新

我设法安装libgtk2.0-dev并再次编译OpenCV.但是错误仍然存​​在.

I managed to install libgtk2.0-dev and compile OpenCV again. But the error remains.

推荐答案

我也有同样的经历.我假设您正在使用 https://github.com/raspberrypi/tools 作为工具链，但是即使您不是问题所在，无论您使用的是哪种工具链，都可能早于gcc/g ++ 4.9.

I've had the same experience. I'm assuming you are using https://github.com/raspberrypi/tools as your toolchain, but even if you are not the problem is that whatever toolchain you are using it probably predates gcc/g++ 4.9.

问题在于Jessie(即Raspbian 4.1.X)使用gcc/g ++ 4.9作为其工具链，而OpenCV正在使用该编译器版本的新STL功能.因此，如果您的应用程序是使用早于gcc/g ++ 4.9的工具链构建的，则它将不会链接.

The problem is that Jessie (i.e. Raspbian 4.1.X) uses gcc/g++ 4.9 as its toolchain and OpenCV is making use of an STL feature that is new to that version of the compiler. Therefore if your application is built with a toolchain that predates gcc/g++ 4.9, it will not link.

解决方案是获取至少4.9或更高版本的工具链，或者坚持使用gcc 4.6的Whaspy版本的Raspbian.

The solution is to either get a toolchain that is at least 4.9 or greater, or stick with the Wheezy release of Raspbian, which uses gcc 4.6.

我在以下文章中详细介绍了交叉编译OpenCV应用程序的经验:

I detailed my experience with cross compiling an OpenCV app in a post here: https://solderspot.wordpress.com/2016/02/04/cross-compiling-for-raspberry-pi-part-ii.

希望对您有所帮助.

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