Remove the headersclean feature

'headersclean' shoudn't be a feature. The respective flag should behave
like command-line switch that affects the only repo that it was passed
for. This also avoids propagating of the headersclean feature between
the different repos when qtbase was built with the headerclean enabled.

Fixes: QTBUG-121722
Change-Id: I304cbc980b06030513c015a2016678a6a0965fed
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

cmake/QtHeadersClean.cmake

@@ -5,6 +5,10 @@
 # ${module_headers} with a custom set of defines. This makes sure our public headers
 # are self-contained, and also compile with more strict compiler options.
 function(qt_internal_add_headersclean_target module_target module_headers)
+    if(INPUT_headersclean AND WASM)
+        message(FATAL_ERROR "The headersclean targets are not supported on WASM platform.")
+    endif()
+
     get_target_property(no_headersclean_check ${module_target} _qt_no_headersclean_check)
     if(no_headersclean_check)
         return()

cmake/QtModuleHelpers.cmake

@@ -486,7 +486,7 @@ function(qt_internal_add_module target)
     endif()
 
     if(arg_NO_HEADERSCLEAN_CHECK OR arg_NO_MODULE_HEADERS OR arg_NO_SYNC_QT
-        OR NOT QT_FEATURE_headersclean)
+        OR NOT INPUT_headersclean)
         set_target_properties("${target}" PROPERTIES _qt_no_headersclean_check ON)
     endif()
 

cmake/QtProcessConfigureArgs.cmake

@@ -302,6 +302,11 @@ function(qt_commandline_option name)
     endif()
 endfunction()
 
+# Add the common command line options for every qt repo.
+macro(qt_add_common_commandline_options)
+    qt_commandline_option(headersclean TYPE boolean)
+endmacro()
+
 function(qt_commandline_prefix arg var)
     set(idx ${commandline_nr_of_prefixes})
     set(commandline_prefix_${idx} "${arg}" "${var}" PARENT_SCOPE)
@@ -318,6 +323,8 @@ set(QT_CONFIGURE_RUNNING ON)
 # Load qt_cmdline.cmake files
 ####################################################################################################
 
+qt_add_common_commandline_options()
+
 while(commandline_files)
     list(POP_FRONT commandline_files commandline_file)
     get_filename_component(commandline_file_directory "${commandline_file}" DIRECTORY)

configure.cmake

@@ -624,12 +624,6 @@ qt_feature("force_asserts" PUBLIC
     LABEL "Force assertions"
     AUTODETECT OFF
 )
-qt_feature("headersclean"
-    LABEL "Check for clean headers"
-    AUTODETECT OFF
-    CONDITION NOT WASM
-)
-qt_feature_config("headersclean" QMAKE_PRIVATE_CONFIG)
 qt_feature("framework" PUBLIC
     LABEL "Build Apple Frameworks"
     AUTODETECT BUILD_SHARED_LIBS

qt_cmdline.cmake

@@ -67,7 +67,6 @@ qt_commandline_option(gdb-index TYPE boolean NAME enable_gdb_index)
 qt_commandline_option(gcov TYPE boolean)
 qt_commandline_option(gnumake TYPE boolean NAME GNUmake)
 qt_commandline_option(gui TYPE boolean)
-qt_commandline_option(headersclean TYPE boolean)
 qt_commandline_option(incredibuild-xge TYPE boolean NAME incredibuild_xge)
 qt_commandline_option(libudev TYPE boolean)
 qt_commandline_option(openssl TYPE optionalString VALUES no yes linked runtime)