CMake: add an option to enable or disable versioned hard link

The option is called QT_CREATE_VERSIONED_HARD_LINK. By default, it
is set to ON. Users can set this option to OFF to disable versioned
hard link.

Pick-to: 6.1
Fixes: QTBUG-93636
Change-Id: I0ffa1ee1c6bae1950df332fcce3152a861b33db0
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

CMakeLists.txt

@@ -81,6 +81,9 @@ if(NOT QT_BUILD_STANDALONE_TESTS)
     ## Should this Qt be built with Werror?
     option(WARNINGS_ARE_ERRORS "Build Qt with warnings as errors" ${FEATURE_developer_build})
 
+    ## Should this Qt create versioned hard link for some tools?
+    option(QT_CREATE_VERSIONED_HARD_LINK "Enable the use of versioned hard link" ON)
+
     ## QtBase specific configure tests:
     include(QtBaseConfigureTests)
 

cmake/QtBuildInternalsExtra.cmake.in

@@ -65,5 +65,9 @@ set(QT_BUILD_EXAMPLES_BY_DEFAULT @QT_BUILD_EXAMPLES_BY_DEFAULT@ CACHE BOOL
 # Propagate usage of ccache.
 set(QT_USE_CCACHE @QT_USE_CCACHE@ CACHE BOOL "Enable the use of ccache")
 
+# Propagate usage of versioned hard link.
+set(QT_CREATE_VERSIONED_HARD_LINK "@QT_CREATE_VERSIONED_HARD_LINK@" CACHE BOOL
+    "Enable the use of versioned hard link")
+
 # Extra set of exported variables
 @QT_EXTRA_BUILD_INTERNALS_VARS@

cmake/QtInstallHelpers.cmake

@@ -136,6 +136,10 @@ function(qt_internal_install_versioned_link install_dir target)
         return()
     endif()
 
+    if(NOT QT_CREATE_VERSIONED_HARD_LINK)
+        return()
+    endif()
+
     qt_path_join(install_base_file_path "$\{qt_full_install_prefix}"
         "${install_dir}" "$<TARGET_FILE_BASE_NAME:${target}>")
     set(original "${install_base_file_path}$<TARGET_FILE_SUFFIX:${target}>")