Apple Mach-O linker and multiple “undefined symbols” error using OpenCV

Question

I am currently a real beginner in Objective C, and I am developing an app using the framework OpenCV.

I am following a tutorial, but while builing the project, I got

Answer 1

You're missing the standard C++ library. You need to link with it to get all the implementations for the STL classes you're getting errors for.

Add the libc++.dylib to your project.