CMake: Introduce QtFeatureCommon.cmake

This file provides common feature-functionality is supposed to be
included by QtFeature.cmake and QtProcessConfigureArgs.cmake.

Change-Id: Ifb483c2a9c4014d240c2a4d6ff07b5c0ceee9c3a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

cmake/QtBaseGlobalTargets.cmake

@@ -355,6 +355,7 @@ qt_copy_or_install(FILES
                    cmake/QtCompilerOptimization.cmake
                    cmake/QtConfigDependencies.cmake.in
                    cmake/QtFeature.cmake
+                   cmake/QtFeatureCommon.cmake
                    cmake/QtFinishPrlFile.cmake
                    cmake/QtFindWrapHelper.cmake
                    cmake/QtFindWrapConfigExtra.cmake.in

cmake/QtFeature.cmake

@@ -1,3 +1,5 @@
+include(QtFeatureCommon)
+
 function(qt_feature_module_begin)
     qt_parse_all_arguments(arg "qt_feature_module_begin"
         "NO_MODULE;ONLY_EVALUATE_FEATURES"
@@ -35,16 +37,6 @@ function(qt_feature_module_begin)
     set(__QtFeature_define_definitions "" PARENT_SCOPE)
 endfunction()
 
-function(qt_feature_normalize_name name out_var)
-    # Normalize the feature name to something CMake can deal with.
-    if(name MATCHES "c\\+\\+")
-        string(REGEX REPLACE "[^a-zA-Z0-9_]" "x" name "${name}")
-    else()
-        string(REGEX REPLACE "[^a-zA-Z0-9_]" "_" name "${name}")
-    endif()
-    set(${out_var} "${name}" PARENT_SCOPE)
-endfunction()
-
 function(qt_feature feature)
     set(original_name "${feature}")
     qt_feature_normalize_name("${feature}" feature)

cmake/QtFeatureCommon.cmake

@@ -0,0 +1,9 @@
+function(qt_feature_normalize_name name out_var)
+    # Normalize the feature name to something CMake can deal with.
+    if(name MATCHES "c\\+\\+")
+        string(REGEX REPLACE "[^a-zA-Z0-9_]" "x" name "${name}")
+    else()
+        string(REGEX REPLACE "[^a-zA-Z0-9_]" "_" name "${name}")
+    endif()
+    set(${out_var} "${name}" PARENT_SCOPE)
+endfunction()