LinuxQuestions.org - How to use CMAKE to get debug libraries for OpenCV

Hello everyone

I am new to using OpenCV on Linux and I have run into the following problem: I am trying to write some first C++ applications using OpenCV. I downloaded the source code (v.3.4.5) for OpenCV from their webpage. Then I compiled the source code using CMAKE, make and make install. So far everything went okay and I can compile and run the first example:https://docs.opencv.org/3.2.0/db/df5...gcc_cmake.html

The problem is that when I try to compile the application in Debug mode using QtCreator, the same code as in the example won't work. Now I assume that is because I need to link the debug libraries for OpenCV when debugging, however, I'm not sure how I can get the debug libraries from the source code. So far I basically tried the following commands in the source-code

Code:

cmake -D WITH_QT=ON -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr/local ..

make

sudo make install

As far as I know, the debug libraries should have the same name as the release libraries but with a "d" at the end, so for example "libopencv_core.so" should be called "libopencv_cored.so". I tried searching for "libopencv_cored.so" using:

Code:

sudo find / -name libopencv_cored.so

but such a file doesn't exist anywhere on the system so I guess my compilation does not create the required debug libraries? So my question is basically how I can compile the debug libraries from the source code?

The CMAKE code for my project currently looks like this:

Code:

cmake_minimum_required(VERSION 2.8)



project(opencv_0)

find_package(OpenCV REQUIRED)

INCLUDE_DIRECTORIES(${OpenCV_INCLUDE_DIRS})

add_executable(${PROJECT_NAME} "main.cpp")

target_link_libraries(opencv_0 debug ${OpenCV_LIBS})

And the C++ code looks like this:

Code:

#include <stdio.h>

#include <opencv2/opencv.hpp>



using namespace cv;



int main(int argc,char** argv)

{

    Mat image;

    image=imread("lenna.jpg",1);

    if(!image.data){

        printf("Could not read picture!\n");

        return 1;

    }

    namedWindow("Display Image",WINDOW_AUTOSIZE);

    imshow("Display Image",image);



    waitKey(0);



    return 0;

}