Trying out OpenMP

CMakeLists.txt

# Basic CMake project
cmake_minimum_required(VERSION 2.8.11)

# Name the project after the exercise
project(omptryout CXX)

set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I/usr/local/opt/libomp/include")
set(OpenMP_CXX_LIB_NAMES "omp")
set(OpenMP_omp_LIBRARY "/usr/local/opt/libomp/lib/libomp.dylib")
find_package(OpenMP REQUIRED)
set(CMAKE_CXX_FLAGS ${OpenMP_CXX_FLAGS})

add_executable(omptryout omptryout.cpp)
target_link_libraries(omptryout ${OpenMP_CXX_LIBRARIES})

omptryout.cpp

#include <omp.h>
#include <cstdio>

int main() {
    puts("Starting...");

    omp_set_num_threads(4);
    #pragma omp parallel
    {
        int ID = omp_get_thread_num();
        printf(" hello(%d) ", ID);
        printf(" world(%d) \n", ID);

        printf("Num threads; %d\n", omp_get_num_threads());
        printf("Max threads; %d\n", omp_get_max_threads());
    }

    puts("Done...");

    return 0;
}