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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \page fine-tuning-features.html
+    \title Fine-Tuning Features in Qt
+    \ingroup qtce
+    \ingroup qt-embedded-linux
+    \brief Describes how to reduce the size of Qt libraries by selecting only
+    the features that are needed.
+
+    In many cases, only a fixed set of applications are deployed on an
+    embedded device, making it possible to save resources by minimizing
+    the size of the associated libraries. The Qt installation can easily
+    be optimized by avoiding to compile in the features that are not
+    required.
+
+    \tableofcontents
+
+    A wide range of features are defined, covering classes and technologies
+    provided by several of Qt's modules.
+    You can look up the different feature definitions in the
+    \c{src/corelib/global/qfeatures.txt} file within the Qt source
+    distribution.
+
+    \section1 Simple Customization
+
+    \section2 Embedded Linux
+
+    To disable a particular feature, just run the \c configure script 
+    for Qt for Embedded Linux with the \c -no-feature-<feature> option.
+    For example:
+
+    \snippet doc/src/snippets/code/doc_src_emb-features.qdoc 1
+
+    The feature can easily be enabled again by running \c configure
+    with the \c -feature-<feature> option.
+
+    See also \l{Qt Performance Tuning}.
+
+    \section2 Windows CE
+
+    To disable a particular feature, just run the \c configure script 
+    with the set of required \c -D<feature> options. For example,
+    you can use the \c -D option to define \c{QT_NO_THREAD}:
+
+    \snippet doc/src/snippets/code/doc_src_emb-features.qdoc 0
+
+    The \c -D option only creates a Qt internal define. If you get linker
+    errors you have to define \c QT_NO_THREAD also for your project.
+    You can do this by adding \c DEFINES += \c QT_NO_THREAD to your
+    \c .pro file.
+
+    See also \l{Qt Performance Tuning}.
+
+    \section1 Managing Large Numbers of Features
+
+    If you want to disable a lot of features, it is more comfortable
+    to use the \c qconfig tool.
+    You can disable a \e set of features by creating a custom
+    configuration file that defines the preferred subset of Qt's
+    functionality. Such a file uses macros to disable the unwanted
+    features, and can be created manually or by using the \c qconfig
+    tool located in the \c{tools/qconfig} directory of the Qt source
+    distribution.
+
+    \note The \c qconfig tool is intended to be built against Qt on
+    desktop platforms.
+
+    \bold{Windows CE:} The Qt for Windows CE package contains a \c qconfig
+    executable that you can run on a Windows desktop to configure the build.
+
+    \image qt-embedded-qconfigtool.png
+
+    The \c qconfig tool's interface displays all of Qt's
+    functionality, and allows the user to both disable and enable
+    features. The user can open and edit any custom configuration file
+    located in the \c{src/corelib/global} directory. When creating a
+    custom configuration file manually, a description of the currently
+    available Qt features can be found in the
+    \c{src/corelib/global/qfeatures.txt} file.
+
+    Note that some features depend on others; disabling any feature
+    will automatically disable all features depending on it. The
+    feature dependencies can be explored using the \c qconfig tool,
+    but they are also described in the \c{src/corelib/global/qfeatures.h}
+    file.
+
+    To be able to apply the custom configuration, it must be saved in
+    a file called \c qconfig-myfile.h in the \c{src/corelib/global}
+    directory. Then use the \c configure tool's \c -qconfig option
+    and pass the configuration's file name without the \c qconfig-
+    prefix and \c .h extension, as argument.
+    The following examples show how this is invoked on each of the
+    embedded platforms for a file called \c{qconfig-myfile.h}:
+
+    \bold{Embedded Linux:}
+
+    \snippet doc/src/snippets/code/doc_src_emb-features.qdoc 3
+
+    \bold{Windows CE:}
+
+    \snippet doc/src/snippets/code/doc_src_emb-features.qdoc 2
+
+    Qt provides several ready-made custom configuration files,
+    defining minimal, small, medium and large installations,
+    respectively. These files are located in the
+    \c{/src/corelib/global} directory in the Qt source distribution.
+*/