Set OpenMP flags for mac

CMakeLists.txt

@@ -306,38 +306,46 @@ SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
 if (LEMMA_USE_OPENMP)
 
-            #    if(APPLE)
-            #if(CMAKE_C_COMPILER_ID MATCHES "Clang")
-            #set(OpenMP_C "${CMAKE_C_COMPILER}")
-            #set(OpenMP_C_FLAGS "-fopenmp=libomp -Wno-unused-command-line-argument")
-            #set(OpenMP_C_LIB_NAMES "libomp" "libgomp" "libiomp5")
-            #set(OpenMP_libomp_LIBRARY ${OpenMP_C_LIB_NAMES})
-            #set(OpenMP_libgomp_LIBRARY ${OpenMP_C_LIB_NAMES})
-            #set(OpenMP_libiomp5_LIBRARY ${OpenMP_C_LIB_NAMES})
-            #endif()
-            #        if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-            #            set(OpenMP_CXX "${CMAKE_CXX_COMPILER}")
-            #            set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I/usr/local/opt/libomp/include")
-            #" -DOpenMP_CXX_LIB_NAMES=\"omp\" -DOpenMP_omp_LIBRARY=/usr/local/opt/libomp/lib/libomp.dylib ")
-            #            set(OpenMP_CXX_LIB_NAMES "omp") # "libgomp" "libiomp5")
-            #            set(OpenMP_libomp_LIBRARY "/usr/local/opt/libomp/lib/libomp.dylib") #${OpenMP_CXX_LIB_NAMES})
-            #set(OpenMP_libgomp_LIBRARY ${OpenMP_CXX_LIB_NAMES})
-            #set(OpenMP_libiomp5_LIBRARY ${OpenMP_CXX_LIB_NAMES})
-            #        endif()
-            #    endif()
+    if(APPLE)
+        if(CMAKE_C_COMPILER_ID MATCHES "Clang")
+            set(OpenMP_C "${CMAKE_C_COMPILER}")
+            set(OpenMP_C_FLAGS "-fopenmp=libomp -Wno-unused-command-line-argument")
+            set(OpenMP_C_LIB_NAMES "libomp" "libgomp" "libiomp5")
+            set(OpenMP_libomp_LIBRARY ${OpenMP_C_LIB_NAMES})
+            set(OpenMP_libgomp_LIBRARY ${OpenMP_C_LIB_NAMES})
+            set(OpenMP_libiomp5_LIBRARY ${OpenMP_C_LIB_NAMES})
+        endif()
+        if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+            set(OpenMP_CXX "${CMAKE_CXX_COMPILER}")
+            set(OpenMP_CXX_FLAGS "-fopenmp=libomp -Wno-unused-command-line-argument")
+            set(OpenMP_CXX_LIB_NAMES "libomp" "libgomp" "libiomp5")
+            set(OpenMP_libomp_LIBRARY ${OpenMP_CXX_LIB_NAMES})
+            set(OpenMP_libgomp_LIBRARY ${OpenMP_CXX_LIB_NAMES})
+            set(OpenMP_libiomp5_LIBRARY ${OpenMP_CXX_LIB_NAMES})
+    #         set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp -I/usr/local/opt/libomp/include")
+    #         " -DOpenMP_CXX_LIB_NAMES=\"omp\" -DOpenMP_omp_LIBRARY=/usr/local/opt/libomp/lib/libomp.dylib ")
+    #         set(OpenMP_CXX_LIB_NAMES "omp") # "libgomp" "libiomp5")
+    #         set(OpenMP_libomp_LIBRARY "/usr/local/opt/libomp/lib/libomp.dylib") #${OpenMP_CXX_LIB_NAMES})
+    #         set(OpenMP_libgomp_LIBRARY ${OpenMP_CXX_LIB_NAMES})
+    #         set(OpenMP_libiomp5_LIBRARY ${OpenMP_CXX_LIB_NAMES})
+        endif()
+    endif()
 
     if (CMAKE_CROSSCOMPILING)
         set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fopenmp")
         set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fopenmp")
         set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fopenmp")
-        add_definitions(-DLEMMAUSEOMP) # -DEIGEN_DONT_VECTORIZE )
     else()
         find_package(OpenMP REQUIRED)
-        set (CMAKE_C_FLAGS "${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} ${OpenMP_EXE_LINKER_FLAGS}")
-        add_definitions(-DLEMMAUSEOMP) # -DEIGEN_DONT_VECTORIZE)
+        if (OPENMP_FOUND)
+            # include_directories("${OPENMP_INCLUDES}")
+            link_directories("${OPENMP_LIBRARIES}")
+            set (CMAKE_C_FLAGS "${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()
     endif()
+    add_definitions(-DLEMMAUSEOMP) # -DEIGEN_DONT_VECTORIZE)
 endif()
 
 configure_file (