Compilation of OpenCV by clang with C++11

Let's start by downloading source code from this site. Then, my procedure is as follows: Here, the error claiming that the function iota is not defined occurred. The place is in the 809-th line of OpenCV-2.4.3/modules/contrib/src/spinimages.cpp. At the top of the file, I added #include <numeric>. Again make. That's all.