OpenCV: undefined reference to `cv::namedWindow(cv::String const&, int)' - c++

Question

UPDATE: The code compiles successfully on another computer. So the problem is not with the code itself but with the way I have the dependencies installed.
If I have omitted any necessary information, please let me know. The full code can be found here.
The following code compiles and runs perfectly fine on Ubuntu 14.04 with OpenCV 3.2.0 freshly installed from SourceForge using these instructions:
#include <stdio.h>
#include <opencv2/opencv.hpp>
using namespace cv;
int main(int argc, char** argv )
{
Mat image;
image = imread( argv[1], 1 );
namedWindow("Display Image", WINDOW_AUTOSIZE );
imshow("Display Image", image);
waitkey(0);
return 0;
}
Using the following CMakeLists.txt:
cmake_minimum_required(VERSION 2.8)
project( DisplayImage )
find_package( OpenCV REQUIRED )
add_executable( DisplayImage DisplayImage.cpp )
target_link_libraries( DisplayImage ${OpenCV_LIBS} )
The following code fails to compile.
lane_finder.h
#ifndef Lane_Finder_h
#define Lane_Finder_h
#include <stdio.h>
#include <ros/ros.h>
#include <sensor_msgs/Image.h>
#include <sensor_msgs/image_encodings.h>
#include <cv_bridge/cv_bridge.h>
#include <opencv2/opencv.hpp>
class LaneFinder
{ *snip* }
#endif
lane_finder.cpp:
#include "lane_finder.h"
sensor_msgs::CompressedImage LaneFinder::findLanes(const sensor_msgs::Image& msg) {
*snip*
frame = in_msg->image;
cv::namedWindow("Display Image", cv::WINDOW_AUTOSIZE );
cv::imshow("Display Image", frame);
*snip*
}
CMakeLists.txt:
cmake_minimum_required(VERSION 2.8.3)
project(lane_finding)
find_package(catkin REQUIRED COMPONENTS roscpp cv_bridge sensor_msgs)
find_package(OpenCV REQUIRED)
catkin_package()
include_directories(include ${catkin_INCLUDE_DIRS} ${OpenCV_INCLUDE_DIRS})
add_executable(lane_finder src/lane_finder.cpp src/main.cpp)
target_link_libraries(lane_finder
${catkin_LIBRARIES}
${OpenCV_LIBS}
)
Compile Errors:
CMakeFiles/lane_finder.dir/src/lane_finder.cpp.o: In function `LaneFinder::findLanes(sensor_msgs::Image_<std::allocator<void> > const&)':
lane_finder.cpp:(.text+0x36c): undefined reference to `cv::namedWindow(cv::String const&, int)'
lane_finder.cpp:(.text+0x3c1): undefined reference to `cv::imshow(cv::String const&, cv::_InputArray const&)'
CMakeFiles/lane_finder.dir/src/lane_finder.cpp.o: In function `cv::String::String(char const*)':
lane_finder.cpp:(.text._ZN2cv6StringC2EPKc[_ZN2cv6StringC5EPKc]+0x4f): undefined reference to `cv::String::allocate(unsigned long)'
CMakeFiles/lane_finder.dir/src/lane_finder.cpp.o: In function `cv::String::~String()':
lane_finder.cpp:(.text._ZN2cv6StringD2Ev[_ZN2cv6StringD5Ev]+0x14): undefined reference to `cv::String::deallocate()'
CMakeFiles/lane_finder.dir/src/lane_finder.cpp.o: In function `cv::String::operator=(cv::String const&)':
lane_finder.cpp:(.text._ZN2cv6StringaSERKS0_[_ZN2cv6StringaSERKS0_]+0x28): undefined reference to `cv::String::deallocate()'
collect2: error: ld returned 1 exit status
I cannot for the life of me figure out why one runs perfectly and the other fails. I suspect that I have linked something improperly, since this is my first time attempting to compile using a header file I wrote myself. If you believe that I have omitted something important in attempting to keep this readable, I have included a link to the github repo containing the full code at the beginning of this post.
Thank you all so much.

Answer 1

You should add this option:
pkg-config opencv --cflags --libs

Answer 2

My pltform:
Win10 64bit
QT58(mingw53)
after installing opencv 3.30, I write code:
//main.cc
#include <iostream>
#include <QDir>
#include <qdebug>
#include "opencv2/opencv.hpp"
using namespace std;
int main()
{
qDebug()<< QDir::currentPath();
cv::Mat image = cv::imread("1.jpg",1);
std::cout << image.cols << " " << image.rows << std::endl;
if(image.data == 0){
cout << "No Image" <<endl;
}
else{
cout << "Image" << endl;
}
cv::namedWindow("My Image");
cv::imshow("My Image", image)
system("pause");
return 0;
}
I get the error, like this:
release/main.o:main.cpp:(.text.startup+0x170): undefined reference to `cv::imshow(cv::String const&, cv::_InputArray const&)'
collect2.exe: error: ld returned 1 exit status
I dont know why, but other functions work well,expect imshow(). And I did add the LIBS:
//qt.pro
INCLUDEPATH += D:\opencv\build\mingw\include
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_highgui330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_calib3d330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_dnn330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_features2d330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_flann330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_imgcodecs330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_imgproc330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_ml330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_objdetect330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_photo330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_shape330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_stitching330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_superres330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_video330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_videoio330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_videostab330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\opencv_ffmpeg330.dll
LIBS += D:\opencv\build\mingw\x86\mingw\bin\libopencv_core330.dll

Answer 3

cv_bridge depends on OpenCV 2.4. Change the CMakeLists.txt to specify:
find_package(OpenCV 2 REQUIRED)