Merge pull request #23095 from fengyuentau:fix_omp_macos

* fix openmp include and link issue on macos

* turn off have_openmp if OpenMP_CXX_INCLUDE_DIRS is empty

* test commit

* use condition HAVE_OPENMP and OpenMP_CXX_LIBRARIES for linking

* remove trailing whitespace

* remove notes

* update conditions

* use OpenMP_CXX_LIBRARIES for linking

cmake/OpenCVFindFrameworks.cmake

@@ -32,6 +32,9 @@ if(WITH_OPENMP)
   if(OPENMP_FOUND)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
+    if(DEFINED OpenMP_CXX_INCLUDE_DIRS AND OpenMP_CXX_INCLUDE_DIRS)
+      ocv_include_directories(${OpenMP_CXX_INCLUDE_DIRS})
+    endif()
   endif()
   set(HAVE_OPENMP "${OPENMP_FOUND}")
 endif()

modules/core/CMakeLists.txt

@@ -168,6 +168,10 @@ if(HAVE_HPX)
   ocv_target_link_libraries(${the_module} LINK_PRIVATE "${HPX_LIBRARIES}")
 endif()
 
+if(HAVE_OPENMP AND DEFINED OpenMP_CXX_LIBRARIES AND OpenMP_CXX_LIBRARIES)
+  ocv_target_link_libraries(${the_module} LINK_PRIVATE "${OpenMP_CXX_LIBRARIES}")
+endif()
+
 ocv_add_accuracy_tests()
 ocv_add_perf_tests()
 

modules/video/CMakeLists.txt

@@ -10,3 +10,7 @@ ocv_define_module(video
       python
       js
 )
+
+if(HAVE_OPENMP AND DEFINED OpenMP_CXX_LIBRARIES AND OpenMP_CXX_LIBRARIES)
+  ocv_target_link_libraries(${the_module} LINK_PRIVATE "${OpenMP_CXX_LIBRARIES}")
+endif()