build: apply OpenMP flags to targets only

Author: allnes

CMakeLists.txt

@@ -44,12 +44,6 @@ if(ITLABAI_ENABLE_OPENMP)
     if(OpenMP_FOUND)
         message(STATUS "OpenMP found - enabling parallel support")
         list(APPEND ITLABAI_FEATURE_DEFS HAS_OPENMP)
-        if(OpenMP_CXX_FLAGS)
-            add_compile_options(${OpenMP_CXX_FLAGS})
-        endif()
-        if(OpenMP_EXE_LINKER_FLAGS)
-            add_link_options(${OpenMP_EXE_LINKER_FLAGS})
-        endif()
     endif()
 endif()
 

cmake/ProjectDefaults.cmake

@@ -40,6 +40,16 @@ function(itlabai_link_externals target_name)
                         target_link_libraries(${target_name} ${_scope} ${dep})
                     endif()
                 endforeach()
+                if(ext STREQUAL "openmp" AND OpenMP_FOUND)
+                    if(DEFINED OpenMP_CXX_FLAGS)
+                        string(REPLACE " " ";" _omp_flags "${OpenMP_CXX_FLAGS}")
+                        target_compile_options(${target_name} ${_scope} ${_omp_flags})
+                    endif()
+                    if(DEFINED OpenMP_EXE_LINKER_FLAGS)
+                        string(REPLACE " " ";" _omp_lflags "${OpenMP_EXE_LINKER_FLAGS}")
+                        target_link_options(${target_name} ${_scope} ${_omp_lflags})
+                    endif()
+                endif()
                 if(TARGET ${ext}_external)
                     add_dependencies(${target_name} ${ext}_external)
                 endif()