Question

我试图在Windows 7上使用OpenCV 4.11和当前版本的Mingw编译简单程序。我从https://github.com/huihut/OpenCV-MinGW-Build下载了OpenCV的二进制文件。我试图使用命令来编译它： “ g ++ main.cpp -std = c ++ 11 -IF：\ cpp_tools \ libs \ OpenCV-MinGW-Build-OpenCV-4.1.1-x64 \ include -LF：\ cpp_tools \ libs \ OpenCV-MinGW-Build-OpenCV -4.1.1-x64 \ x64 \ mingw \ lib -lopencv_core411.dll -lopencv_imgcodecs411.dll -lopencv_imgproc411.dll -lopencv_highgui411.dll -o myprog.exe“

我得到了链接器错误：
C：\ Users \ Radek \ AppData \ Local \ Temp \ ccyTSmo1.o：main.cpp :(。text + 0xa0）：未定义对cv::imread(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)' C:\Users\Radek\AppData\Local\Temp\ccyTSmo1.o:main.cpp:(.text+0x13e): undefined r eference to cv :: namedWindow（std :: __ cxx11 :: basic_string，std :: allocator> const＆，int）的引用）” C：\ Users \ Radek \ AppData \ Local \ Temp \ ccyTSmo1.o：main.cpp :(。text + 0x19f）：未定义 cv::imshow(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::_InputArray const&)' C:\Users\Radek\AppData\Local\Temp\ccyTSmo1.o:main.cpp:(.text+0x1c9): undefined r eference to cv :: waitKey（int）'的引用 C：\ Users \ Radek \ AppData \ Local \ Temp \ ccyTSmo1.o：main.cpp :(。text $ _ZN2cv3MatD1Ev [__ ZN 2cv3MatD1Ev] + 0x2d）：对cv::fastFree(void*)' C:\Users\Radek\AppData\Local\Temp\ccyTSmo1.o:main.cpp:(.text$_ZN2cv3Mat7releaseE v[__ZN2cv3Mat7releaseEv]+0x40): undefined reference to cv :: Mat :: deallocate（）'的未定义引用 C：\ Users \ Radek \ AppData \ Local \ Temp \ ccyTSmo1.o：main.cpp :(。text $ ZN2cv3MataSEOS0 [_ ZN2cv3MataSEOS0 ] + 0xb4）：对`cv :: fastFree（void *）'的未定义引用 collect2.exe：错误：ld返回1退出状态

我阅读了很多类似的问题，但是都没有解决我的问题。

源代码：

#include <opencv2/core.hpp>
#include <opencv2/imgcodecs.hpp>
#include <opencv2/highgui.hpp>
#include <iostream>
#include <string>
using namespace cv;
using namespace std;

int main(int argc, char** argv) {
String imageName( "../data/HappyFish.jpg" ); // by default
if( argc > 1)
{
    imageName = argv[1];
}
Mat image;
image = imread( imageName, IMREAD_COLOR ); // Read the file
if( image.empty() )                      // Check for invalid input
{
    cout <<  "Could not open or find the image" << std::endl ;
    return -1;
}
namedWindow( "Display window", WINDOW_AUTOSIZE ); 
imshow( "Display window", image );    
waitKey(0); // Wait for a keystroke in the window
return 0;
}

Answer 1

应该不是

g++ main.cpp -std=c++11 -I F:\cpp_tools\libs\OpenCV-MinGW-    
Build-OpenCV-4.1.1-x64\include -L F:\cpp_tools\libs\OpenCV- 
MinGW-Build-OpenCV-4.1.1-x64\x64\mingw\lib  
-llibopencv_core411 -llibopencv_imgcodecs411  
-llibopencv_imgproc411 -llibopencv_highgui411 -o 
myprog.exe

用-llibopencv而不是-lopencv？

您是否尝试过GitHub上提到的帮助Running a C++ program with OpenCV 3.4.1 using MinGW-w64 g++ in Visual Studio Code on Windows 10 x64？

编译OpenCV示例时出现链接错误

1 个答案: