with Dev-C++, but got undefined reference
Please help me out. Thanks in advance.
I think I already include the header and library folder, as well as the opencv_world library, but still go the following errors. (I also set the env path variable). Please kindly help to check the following log for me and share some comments of yours, thanks. ps. I already comment out other function calls, except VideoCapture cap(0); and got undefined reference to VideoCapture.
gcc.exe -D__DEBUG__ -c main.cpp -o main.o -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64-mingw32/4.9.2/include" -I"C:/opencv/build/include" -I"C:/opencv/build/include" -g3
g++.exe -D__DEBUG__ main.o -o webcam_opencv.exe -L"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib" -L"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/lib" -L"C:/opencv/build/x64/vc14/lib" -L"C:/opencv/build/x64/vc14/lib" ../../../../../opencv/build/x64/vc14/lib/opencv_world331d.lib -g3
main.o: In function main':
C:\Users\Tsai\Documents\Webcam\opencv/main.cpp:9: undefined reference tocv::VideoCapture::VideoCapture(int)'
C:\Users\Tsai\Documents\Webcam\opencv/main.cpp:9: undefined reference to `cv::VideoCapture::~VideoCapture()'
collect2.exe: error: ld returned 1 exit status
Best Wishes Simon
"/build/x64/vc14/lib/opencv_world331d.lib" -- NO. you cannot use the prebuild opencv libs, they are for VS2015 only.
if you want to use mingw, step1 is: get cmake, and build opencv libs from src.
Thank you, Berak.
I just tried to compile the opencv based on the following link. https://zahidhasan.github.io/2017-03-... After the steps described within the link, when I tried to compile the sample code, I got the following error....
../../../../../opencv/build/install/x64/mingw/lib/OpenCVConfig.cmake: file not recognized: File format not recognized collect2.exe: error: ld returned 1 exit status
Please kindly help. Thanks in advance.
showing links to tutorials is useless, we need to see, what you did
were you able to build the opencv libs ? (in that case it's only a problem of "how to use them" now.
(and probably noone else is using dev-cpp here, so don't expect much, if it is related to that)
Berak, you are quite right, what I did was wrong...didn't check in detail... When I tried to link the libraries, I selected (all) the cmake files by mistake.
Everything is working now! ^^ Thanks for your help~