CMake: Set SKIP_AUTOMOC/AUTOUIC where needed

Make sure we don't run into warnings for CMake 3.10

Task-number: QTBUG-63442
Change-Id: Ida004705646f0c32fb4bf6006036d80b1f279fd7
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Sebastian Holtermann <sebholt@xwmw.org>
Reviewed-by: Rolf Eike Beer <eb@emlix.com>

src/corelib/Qt5CoreMacros.cmake

@@ -137,6 +137,9 @@ function(QT5_CREATE_MOC_COMMAND infile outfile moc_flags moc_options moc_target
                        DEPENDS ${infile} ${moc_depends}
                        ${_moc_working_dir}
                        VERBATIM)
+    set_source_files_properties(${infile} PROPERTIES SKIP_AUTOMOC ON)
+    set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOMOC ON)
+    set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOUIC ON)
 endfunction()
 
 
@@ -155,7 +158,6 @@ function(QT5_GENERATE_MOC infile outfile )
         set(moc_target ${ARGV3})
     endif()
     qt5_create_moc_command(${abs_infile} ${_outfile} "${moc_flags}" "" "${moc_target}" "")
-    set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOMOC TRUE)  # dont run automoc on this file
 endfunction()
 
 
@@ -246,6 +248,7 @@ function(QT5_ADD_BINARY_RESOURCES target )
         get_filename_component(infile ${it} ABSOLUTE)
 
         _QT5_PARSE_QRC_FILE(${infile} _out_depends _rc_depends)
+        set_source_files_properties(${infile} PROPERTIES SKIP_AUTORCC ON)
         set(infiles ${infiles} ${infile})
         set(out_depends ${out_depends} ${_out_depends})
         set(rc_depends ${rc_depends} ${_rc_depends})
@@ -255,7 +258,6 @@ function(QT5_ADD_BINARY_RESOURCES target )
                        COMMAND ${Qt5Core_RCC_EXECUTABLE}
                        ARGS ${rcc_options} --binary --name ${target} --output ${rcc_destination} ${infiles}
                        DEPENDS ${rc_depends} ${out_depends} VERBATIM)
-
     add_custom_target(${target} ALL DEPENDS ${rcc_destination})
 endfunction()
 
@@ -283,12 +285,15 @@ function(QT5_ADD_RESOURCES outfiles )
         set(outfile ${CMAKE_CURRENT_BINARY_DIR}/qrc_${outfilename}.cpp)
 
         _QT5_PARSE_QRC_FILE(${infile} _out_depends _rc_depends)
+        set_source_files_properties(${infile} PROPERTIES SKIP_AUTORCC ON)
 
         add_custom_command(OUTPUT ${outfile}
                            COMMAND ${Qt5Core_RCC_EXECUTABLE}
                            ARGS ${rcc_options} --name ${outfilename} --output ${outfile} ${infile}
                            MAIN_DEPENDENCY ${infile}
                            DEPENDS ${_rc_depends} "${out_depends}" VERBATIM)
+        set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOMOC ON)
+        set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOUIC ON)
         list(APPEND ${outfiles} ${outfile})
     endforeach()
     set(${outfiles} ${${outfiles}} PARENT_SCOPE)

src/widgets/Qt5WidgetsMacros.cmake

@@ -59,6 +59,9 @@ function(QT5_WRAP_UI outfiles )
           COMMAND ${Qt5Widgets_UIC_EXECUTABLE}
           ARGS ${ui_options} -o ${outfile} ${infile}
           MAIN_DEPENDENCY ${infile} VERBATIM)
+        set_source_files_properties(${infile} PROPERTIES SKIP_AUTOUIC ON)
+        set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOMOC ON)
+        set_source_files_properties(${outfile} PROPERTIES SKIP_AUTOUIC ON)
         list(APPEND ${outfiles} ${outfile})
     endforeach()
     set(${outfiles} ${${outfiles}} PARENT_SCOPE)

tests/auto/cmake/CMakeLists.txt

@@ -157,7 +157,13 @@ if (NOT CMAKE_VERSION VERSION_LESS 2.8.11 AND NOT NO_WIDGETS)
     expect_pass(test_interface)
 endif()
 
-if (NOT CMAKE_VERSION VERSION_LESS 2.8.12)
-    expect_pass(test_interface_link_libraries)
-    expect_pass(test_moc_macro_target)
+expect_pass(test_interface_link_libraries)
+expect_pass(test_moc_macro_target)
+
+if (NOT CMAKE_VERSION VERSION_LESS 3.8)
+    # With earlier CMake versions, this test would simply run moc multiple times and lead to:
+    # /usr/bin/ld: error: CMakeFiles/mywidget.dir/mywidget_automoc.cpp.o: multiple definition of 'MyWidget::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)'
+    # /usr/bin/ld: CMakeFiles/mywidget.dir/moc_mywidget.cpp.o: previous definition here
+    # Reason: SKIP_* properties were added in CMake 3.8 only
+    expect_pass(test_QTBUG-63422)
 endif()

tests/auto/cmake/test_QTBUG-63422/CMakeLists.txt

@@ -0,0 +1,30 @@
+cmake_minimum_required(VERSION 2.8)
+project(test_dependent_modules)
+
+find_package(Qt5Widgets REQUIRED)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+# make sure CMP0071 warnings cause a test failure
+set(CMAKE_SUPPRESS_DEVELOPER_ERRORS FALSE CACHE INTERNAL "" FORCE)
+
+qt5_wrap_cpp(moc_files mywidget.h)
+qt5_wrap_ui(ui_files mywidget.ui)
+qt5_add_resources(qrc_files res.qrc)
+
+add_executable(mywidget
+    # source files
+    mywidget.cpp
+    mywidget.h
+    mywidget.ui
+    res.qrc
+
+    # generated files
+    ${moc_files}
+    ${ui_files}
+    ${qrc_files}
+)
+target_link_libraries(mywidget ${Qt5Widgets_LIBRARIES})

tests/auto/cmake/test_QTBUG-63422/mywidget.cpp

@@ -0,0 +1,43 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Kevin Funk <kevin.funk@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "mywidget.h"
+#include "ui_mywidget.h"
+
+MyWidget::MyWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    emit someSignal();
+}
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    MyWidget myWidget;
+    return 0;
+}

tests/auto/cmake/test_QTBUG-63422/mywidget.h

@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Kevin Funk <kevin.funk@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MYWIDGET_H
+#define MYWIDGET_H
+
+#include <QWidget>
+
+namespace Ui
+{
+class MyWidget;
+}
+
+class MyWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    MyWidget(QWidget *parent = nullptr);
+
+signals:
+    void someSignal();
+
+private:
+    Ui::MyWidget *ui = nullptr;
+};
+
+#endif

tests/auto/cmake/test_QTBUG-63422/mywidget.ui

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Form</class>
+ <widget class="QWidget" name="Form">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QPushButton" name="pushButton">
+     <property name="text">
+      <string>PushButton</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLineEdit" name="lineEdit"/>
+   </item>
+   <item>
+    <widget class="QTextEdit" name="textEdit"/>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

tests/auto/cmake/test_QTBUG-63422/res.qrc

@@ -0,0 +1,4 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+</qresource>
+</RCC>