Make version_tagging the full-functional feature

This feature allows to explicitly disable the version tagging for Qt
libraries and have the precise feature-based guarding in C++ code.

Task-number: QTBUG-124346
Change-Id: If109adb2f6a998c58825a2449cfb936ea278b2ad
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

configure.cmake

@@ -203,8 +203,16 @@ if(NOT QT_CONFIGURE_RUNNING)
     qt_evaluate_feature(use_gold_linker)
     qt_evaluate_feature(use_lld_linker)
     qt_evaluate_feature(use_mold_linker)
+
+    qt_run_linker_version_script_support()
 endif()
 
+qt_feature("version_tagging"
+    PUBLIC
+    AUTODETECT TRUE
+    CONDITION TEST_ld_version_script OR APPLE OR WIN32
+)
+qt_feature_definition("version_tagging" "QT_NO_VERSION_TAGGING" NEGATE)
 
 #### Tests
 

src/corelib/CMakeLists.txt

@@ -456,7 +456,7 @@ endif()
 set(core_version_tagging_files
     global/qversiontagging.cpp)
 qt_internal_extend_target(Core
-    CONDITION TEST_ld_version_script OR APPLE OR WIN32
+    CONDITION QT_FEATURE_version_tagging
     SOURCES ${core_version_tagging_files}
 )
 

src/corelib/global/qglobal.h

@@ -67,8 +67,9 @@
 #include <QtCore/qtresource.h>
 #include <QtCore/qttranslation.h>
 #include <QtCore/qttypetraits.h>
+#if QT_CONFIG(version_tagging)
 #include <QtCore/qversiontagging.h>
-
+#endif
 #endif /* __cplusplus */
 
 #endif /* QGLOBAL_H */

src/corelib/global/qversiontagging.h

@@ -13,6 +13,8 @@
 #include <QtCore/qtversionchecks.h>
 #include <QtCore/qtypes.h>
 
+QT_REQUIRE_CONFIG(version_tagging);
+
 QT_BEGIN_NAMESPACE
 
 /*