CMake: Improve QT5_GET_MOC_FLAGS macro

We need to handle CMAKE_INCLUDE_CURRENT_DIR for include directories.
Otherwise generated files located in the current binary directory are
not found as expected.

e.g. *.json file as meta data for Qt5's plugins generated at build time.

Change-Id: I14ae1e7013f9d8b485aa990d50db4a03ca4f4b81
Reviewed-by: Yuchen Deng <loaden@gmail.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

src/corelib/Qt5CoreMacros.cmake

@@ -69,6 +69,10 @@ macro(QT5_GET_MOC_FLAGS _moc_flags)
     set(${_moc_flags})
     get_directory_property(_inc_DIRS INCLUDE_DIRECTORIES)
 
+    if(CMAKE_INCLUDE_CURRENT_DIR)
+        list(APPEND _inc_DIRS ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
+    endif()
+
     foreach(_current ${_inc_DIRS})
         if("${_current}" MATCHES "\\.framework/?$")
             string(REGEX REPLACE "/[^/]+\\.framework" "" framework_path "${_current}")

tests/auto/cmake/CMakeLists.txt

@@ -78,6 +78,7 @@ endif()
 expect_pass(test_private_includes)
 expect_pass(test_modules)
 expect_pass(test_testlib_definitions)
+expect_pass(test_json_plugin_includes)
 
 expect_fail(test_testlib_no_link_gui)
 expect_fail(test_testlib_no_link_widgets)

tests/auto/cmake/test_json_plugin_includes/CMakeLists.txt

@@ -0,0 +1,21 @@
+
+cmake_minimum_required(VERSION 2.8)
+
+project(test_json_plugin_includes)
+
+find_package(Qt5Core REQUIRED)
+
+include_directories(${Qt5Core_INCLUDE_DIRS})
+
+add_definitions(${Qt5Core_DEFINITIONS})
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/jsontestplugin.json" "{}\n")
+
+qt5_wrap_cpp(moc_files plugin.h)
+
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Qt5Core_EXECUTABLE_COMPILE_FLAGS}")
+
+add_library(plugin plugin.cpp ${moc_files})
+target_link_libraries(plugin ${Qt5Core_LIBRARIES})

tests/auto/cmake/test_json_plugin_includes/plugin.cpp

@@ -0,0 +1,50 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Stephen Kelly <stephen.kelly@kdab.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "plugin.h"
+
+JsonTestPlugin::JsonTestPlugin(QObject *parent)
+  : QObject(parent)
+{
+
+}
+
+#include "moc_plugin.cpp"

tests/auto/cmake/test_json_plugin_includes/plugin.h

@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Stephen Kelly <stephen.kelly@kdab.com>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef JSON_TEST_PLUGIN_H
+#define JSON_TEST_PLUGIN_H
+
+#include <QObject>
+
+class JsonTestPlugin : public QObject
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "JsonTestPlugin" FILE "jsontestplugin.json")
+public:
+    JsonTestPlugin(QObject *parent = 0);
+};
+
+#endif