编译期间无法 link 打开 cv 库

Question

我按照 this tutorial 从 github 源代码构建了 opencv，一切都成功了，但是在编译我的示例程序以绘制圆圈时，

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace cv;

int main( )
{    
  // Create black empty images
  Mat image = Mat::zeros( 400, 400, CV_8UC3 );

  // Draw a line 
  line( image, Point( 15, 20 ), Point( 70, 50), Scalar( 110, 220, 0 ),  2, 8 );
  imshow("Image",image);

  waitKey( 0 );
  return(0);
}

我遇到错误。根据 this question，我必须在编译我的程序时 link 导入的库。但是在我的 MinGW/lib 文件夹中没有 opencv_core.a 或 opencv_highgui.a 这样的文件，而是 libopencv_core400.dll.a 和 libopencv_highgui400.dll.a

所以，如果我尝试使用选项 -lopencv_core 和 -lopencv_highgui

D:\Programs\CppProgramming>g++ -lopencv_core -lopencv_highgui -std=c++11 OpenCVTest.cpp
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/5.1.0/../../../../mingw32/bin/ld.exe: cannot find -lopencv_core
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/5.1.0/../../../../mingw32/bin/ld.exe: cannot find -lopencv_highgui
collect2.exe: error: ld returned 1 exit status

甚至使用选项 -llibopencv_core400 和 -llibopencv_highgui400

D:\Programs\CppProgramming>g++ -llibopencv_core400 -llibopencv_highgui400 -std=c++11 OpenCVTest.cpp
C:\Users\vivek\AppData\Local\Temp\ccnjHIL5.o:OpenCVTest.cpp:(.text+0x80): undefined reference to `cv::Mat::zeros(int, int, int)'
C:\Users\vivek\AppData\Local\Temp\ccnjHIL5.o:OpenCVTest.cpp:(.text+0x157): undefined reference to `cv::circle(cv::_InputOutputArray const&, cv::Point_<int>, int, cv::Scalar_<double> const&, int, int, int)'
C:\Users\vivek\AppData\Local\Temp\ccnjHIL5.o:OpenCVTest.cpp:(.text+0x1c2): undefined reference to `cv::imshow(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cv::_InputArray const&)'
C:\Users\vivek\AppData\Local\Temp\ccnjHIL5.o:OpenCVTest.cpp:(.text+0x1f6): undefined reference to `cv::waitKey(int)'
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/5.1.0/../../../../mingw32/bin/ld.exe: C:\Users\vivek\AppData\Local\Temp\ccnjHIL5.o: bad reloc address 0x12 in section `.text$_ZN2cv11_InputArrayC2Ev[__ZN2cv11_InputArrayC2Ev]'
C:/Program Files (x86)/CodeBlocks/MinGW/bin/../lib/gcc/mingw32/5.1.0/../../../../mingw32/bin/ld.exe: final link failed: Invalid operation
collect2.exe: error: ld returned 1 exit status

我不确定我哪里出错了。我在哪里可以找到这些库 link 并成功编译我的程序？任何帮助，将不胜感激。谢谢..

Answer 1

按以下顺序使用以下命令解决了我的编译问题

g++ -std=c++11 OpenCVTest.cpp -llibopencv_core400 -llibopencv_highgui400 -llibopencv_imgproc400

编译期间无法 link 打开 cv 库

Not able to link opencv library during compilation

c++

opencv

mingw