Compiling Error, OpenCV: cv.h: No such file or directory

[Lieske]

I'm attempting to complie some code written in c++


g++ codename.cpp -o codename

However, when I try compiling I get the error:


codename.cpp:4:16: fatal error: cv.h: No such file or directory

Can someone shed on light on what this error means?

[DreeDrunk]

It seems that the compiler cannot find the header file with the name cv.h called in the fourth line of your code.

[steeldriver]

It's part of the older C API I think - you need libcv-dev as well as libopencv-dev, then you need to give the include path - easiest way is via pkg-config


g++ `pkg-config --cflags opencv` codename.cpp -o codename

Likewise you will need to tell the linker where to find the actual libs


g++ `pkg-config --cflags opencv` codename.cpp `pkg-config --libs opencv` -o codename