error: ‘CV_WINDOW_AUTOSIZE’ was not declared in this scope
#include <opencv2/highgui/highgui.hpp>
NOTE:
since all the windowing stuff is in the highgui module, you'll need to include above header.
Example error:
prashad@ubuntu:~/test$ g++ create_ipl_image.cpp `pkg-config opencv cvblob --cflags --libs`
create_ipl_image.cpp: In function ‘int main()’:
create_ipl_image.cpp:14:31: error: ‘CV_WINDOW_AUTOSIZE’ was not declared in this scope
cvNamedWindow( "Image2", CV_WINDOW_AUTOSIZE );