Our simple example seems to work: the code compiled and linked, and we observe a speed-up when running on multiple cores. The fact that the speed-up is not a perfect multiple of OMP_NUM_THREADS is not our concern in this recipe, since we focus on the CMake aspect of a project which requires OpenMP. We have found linking to OpenMP to be extremely compact thanks to imported targets provided by a reasonably modern FindOpenMP module:
target_link_libraries(example PUBLIC OpenMP::OpenMP_CXX )
We did not have to worry about compile flags or about include directories - these settings and dependencies are encoded in the definition of the library OpenMP::OpenMP_CXX which is of the IMPORTED type. As we mentioned in Recipe 3, Building and ...
