I installed opencv via `pacman -S mingw-w64-i686-opencv` in my MSYS2.
Then I wrote a simple c demo program.
#include
#include
int main() {
IplImage* img = cvLoadImage("a4-paper.jpg");
cvShowImage("test",img);
cvWaitKey(0);
return 0;
}
I compiled it with
gcc `pkg-config --cflags opencv` -o opencv_demo opencv_demo.c `pkg-config --libs opencv`
The output was
Liu.D.H@desktop-ldh MINGW32 /c/Users/Liu.D.H/Desktop/helloC$ gcc `pkg-config --cflags opencv` -o opencv_demo opencv_demo.c `pkg-config --libs opencv`
In file included from C:/msys32/mingw32/include/opencv2/core/core_c.h:48:0,
from C:/msys32/mingw32/include/opencv/cv.h:63,
from opencv_demo.c:1:
C:/msys32/mingw32/include/opencv2/highgui/highgui_c.h:139:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
CVAPI(cv::Rect)cvGetWindowImageRect(const char* name);
^
opencv_demo.c: In function 'main':
opencv_demo.c:5:21: warning: implicit declaration of function 'cvLoadImage'; did you mean 'cvShowImage'? [-Wimplicit-function-declaration]
IplImage* img = cvLoadImage("a4-paper.jpg");
^~~~~~~~~~~
cvShowImage
opencv_demo.c:5:21: warning: initialization makes pointer from integer without a cast [-Wint-conversion]
Liu.D.H@desktop-ldh MINGW32 /c/Users/Liu.D.H/Desktop/helloC$
↧