[CMake] openmp with CMake

3 lines to use openmp in your cmake code

OpenMP and CMake

include(FindOpenMP)
if(OPENMP_FOUND)
	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_EXE_LINKER_FLAGS}")
endif()

The old way to do that was :

SET(CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -fopenmp”)
SET(CMAKE_C_FLAGS “${CMAKE_C_FLAGS} -fopenmp”)