libopencv_calib3d: undefined reference to `std::__throw_out_of_range_fmt(char const*, …)@GLIBCXX_3.4.20'
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.
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.
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.
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.
Hope it is of some help.
Luffy
Updated on June 07, 2022Comments
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Luffy almost 2 years
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.
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
My code is:
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; } } }
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 */
How can I resolve this?
UPDATE
I managed to install libgtk2.0-dev and compile OpenCV again. But the error remains.