Mac下用g++编译opencv程序报错
问题描述：在Mac下安装好opencv， 安装：
bashbrew install opencv
写了一个opencv程序：
``` C++
//作用就是：取视频的每一帧，然后每隔50帧保存一次。
include
include "opencv2/opencv.hpp"
using namespace cv;
int main(int argc, char argv[])
{
CvCapture capture = cvCaptureFromAVI("./test.mp4");
int i = 0;
IplImage* img = 0;
char image_name;
cvNamedWindow( "vivi");
int nFrame = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
while (1) { img = cvQueryFrame(capture);
cvShowImage("vivi", img);
char key = cvWaitKey(20);
std::cout << i << std::endl;
i++;
if (i % 50 != 0)
continue;
sprintf(image_name, "%s%d%s", "image_", i, "_.jpg");
cvSaveImage(image_name, img);
if ( i == nFrame ) {
break;
}
}
return 0;
```
编辑好后保存为Test.cpp
编译： g++ Test.cpp -o Test
错误：
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
大概知道是链接错误，google以后发现，是因为找到不到相应的opencv所需要的库。
解决办法:
利用pkg-config 获取相应的库， 安装命令：
brew install pkg-config
重新安装opencv
brew reinstall opencv
编译程序
g++ $(pkg-config --cflags --libs opencv) Test.cpp -o Test
可以查看具体引用库
pkg-config --cflags --libs opencv
-I/usr/local/include/opencv -I/usr/local/include -L/usr/local/lib -lopencv_shape -lopencv_stitching -lopencv_objdetect -lopencv_superres -lopencv_videostab -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_video -lopencv_photo -lopencv_ml -lopencv_imgproc -lopencv_flann -lopencv_core -lopencv_hal
参考链接：
http://stackoverflow.com/questions/24985713/opencv-undefined-symbols-for-architecture-x86-64-error
页:
[1]