There is a thread (clang-omp in Xcode under El Capitan) discussing the possibilities of running OpenMP under El Capitan which was Xcode 7 I assume. I am wondering if it is possible to do it Xcode 8.
I have tried both methods mentioned in the thread clang-omp in Xcode under El Capitan, but neither worked for Xcode 8. Considering it was between 2015 - 2016, I assume they work for Xcode 7. Following the setup steps allow me to run OpenMP in command line but not in Xcode 8 (get clang: error: unsupported option '-fopenmp').
Based on the methods by eborisch (https://stackoverflow.com/users/846792/eborisch)
[1] sudo port install clang-3.8 ld64 +ld64_xcode
[2] User-defined setting CC /opt/local/bin/clang-mp-3.8 (there is a typo in the original post)
[3] Other C Flags: -fopenmp
[4] Other Linker Flags: -fopenmp
[5] Enable Modules (C and Objective-C): No
[6] Add /opt/local/include/libomp (different from original post) to Header Search Paths under the project's build settings
[7] Add #include <omp.h> to your script