diff --git a/cmake/QtConfig.cmake.in b/cmake/QtConfig.cmake.in
index b5a21e391d1..5c3e79a5b7c 100644
--- a/cmake/QtConfig.cmake.in
+++ b/cmake/QtConfig.cmake.in
@@ -33,6 +33,19 @@ else()
                              QT_VERSION_PATCH @PROJECT_VERSION_PATCH@)
 endif()
 
+if(TARGET @INSTALL_CMAKE_NAMESPACE@::PlatformCommonInternal)
+    get_target_property(_qt_platform_internal_common_target
+        @INSTALL_CMAKE_NAMESPACE@::PlatformCommonInternal ALIASED_TARGET)
+    if(NOT _qt_platform_internal_common_target)
+        set(_qt_platform_internal_common_target @INSTALL_CMAKE_NAMESPACE@::PlatformCommonInternal)
+    endif()
+    set_target_properties(${_qt_platform_internal_common_target}
+        PROPERTIES
+            _qt_internal_cmake_generator "${CMAKE_GENERATOR}"
+    )
+    unset(_qt_platform_internal_common_target)
+endif()
+
 get_filename_component(_qt_import_prefix "${CMAKE_CURRENT_LIST_FILE}" PATH)
 get_filename_component(_qt_import_prefix "${_qt_import_prefix}" REALPATH)
 list(APPEND CMAKE_MODULE_PATH "${_qt_import_prefix}")
diff --git a/cmake/QtInternalTargets.cmake b/cmake/QtInternalTargets.cmake
index 012c355c015..3eb534293c2 100644
--- a/cmake/QtInternalTargets.cmake
+++ b/cmake/QtInternalTargets.cmake
@@ -347,7 +347,25 @@ if(QT_FEATURE_libstdcpp_assertions)
 endif()
 
 if(QT_FEATURE_libcpp_hardening)
-    target_compile_definitions(PlatformCommonInternal INTERFACE -D_LIBCPP_HARDENING_MODE=$<IF:$<CONFIG:Debug>,_LIBCPP_HARDENING_MODE_EXTENSIVE,_LIBCPP_HARDENING_MODE_FAST>)
+    string(JOIN "" hardening_flags
+        "$<$<NOT:$<STREQUAL:"
+            "$<TARGET_PROPERTY:"
+                "${QT_CMAKE_EXPORT_NAMESPACE}::PlatformCommonInternal,"
+                "_qt_internal_cmake_generator"
+            ">,"
+            "Xcode"
+        ">>:"
+            "_LIBCPP_HARDENING_MODE=$<IF:$<CONFIG:Debug>,"
+                "_LIBCPP_HARDENING_MODE_EXTENSIVE,"
+                "_LIBCPP_HARDENING_MODE_FAST"
+            ">"
+        ">"
+    )
+    set_target_properties(PlatformCommonInternal
+        PROPERTIES
+            _qt_internal_cmake_generator "${CMAKE_GENERATOR}"
+    )
+    target_compile_definitions(PlatformCommonInternal INTERFACE "${hardening_flags}")
 endif()
 
 if(QT_FEATURE_relro_now_linker)