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/*!
    \page windows-support.html
    \title Qt for Windows
    \brief Platform support for Windows.
    \ingroup supportedplatform

    Qt's support for different Windows platforms is extensive and mature.
    Before you get started, ensure that your development environment fulfills
    the \l{Qt for Windows Requirements}{requirements}.

    The \e{Reference Configuration} section of the \l{Supported Platforms} page
    contains the list of Windows version and the compiler tested to work with
    Qt.

    \section1 Downloading and Installing Qt

    You can download Qt 5 installer from \l{http://qt-project.org/downloads}.
    The download page contains the installer and the source packages for all
    supported development platforms. Once downloaded, the installation program
    runs like any executable on Windows. With the installer, you can select the
    components you want to install and follow the instructions of the
    installation program to complete the installation.

    \note Qt Enterprise packages are available from the \l{Try Qt Enterprise}
    page.

    The \l{Qt Installation Program} page contains the full installation
    procedure and the available installers for the different Windows versions.

    \section2 Building Qt 5 from Source

    You can also build Qt 5 from the source package and configure it according
    to your target platform. The source packages are obtained from
    \l{http://qt-project.org/downloads}.

    Below, you will find more information about building Qt from source.
    \list
        \li \l{Qt for Windows - Requirements}
        \li \l{Qt for Windows - Building from Source}
    \endlist

    \section1 Deployment and Other Issues

    The pages below covers specific issues and recommendations for creating
    Windows applications.

    \list
    \li \l{Qt for Windows - Deployment}
    \li \l{Qt for Windows - Specific Issues}
    \endlist

    \section1 Where to Go from Here

    We invite you to explore the rest of Qt. We prepared overviews which help
    you decide which APIs to use and our examples demonstrate how to use our
    API.

    \list
    \li \l{Qt Overviews} - list of topics about application development
    \li \l{Qt Examples and Tutorials}{Examples and Tutorials} - code samples and tutorials
    \li \l{Qt Reference Pages} - a listing of C++ and QML APIs
    \li \l{ActiveX in Qt}
    \endlist

    Qt's vibrant and active community site, \l{http://qt-project.org} houses
    a wiki, a forum, and additional learning guides and presentations.

    \section2 Visual Studio Add-in

    The Qt Visual Studio Add-in allows programmers to create, build, debug
    and run Qt applications from within non-Express versions of Microsoft Visual Studio
    2008, 2010, and 2012. The add-in contains project wizards, Qt project import/export
    support, integrated Qt resource manager and automated build setup for
    the Qt Meta-Object Compiler, User Interface Compiler, and Resource
    Compiler.

*/

/*!
    \page windows-requirements.html
    \title Qt for Windows - Requirements
    \brief Requirements of the Windows environment.

    This page describes the required libraries and environment for
    \l{Qt for Windows}.

    \section1 Libraries

    These libraries are required when running Qt 5 applications in Windows:

    \list
        \li \l{ICU}: Qt 5 uses the ICU library for UNICODE and Globalization
           support (required for Qt WebKit). At compile time, the \e include and
           \e lib folders of the ICU installation must be appended to the \c
           INCLUDE and \c LIB environment variables. At run-time, the ICU DLLs
           need to be found by copying the DLLs to the
           application folder or by adding the \e bin folder of the ICU
           installation to the \c PATH environment variable.

        \li \l{ANGLE}: This library converts
           OpenGL ES 2.0 API calls to DirectX 9, removing the need to install
           graphics drivers on the target machines. Building
           the library requires the installation of the \l{Direct X SDK}.
           More information is available at \l{http://code.google.com/p/angleproject/wiki/DevSetup}

           \note When building for 64-bit environments, de-activate the
           \c WarnAsError option in every project file, otherwise, integer
           conversion warnings will break the build.
    \endlist

    \section2 Graphics Drivers

    For \l{Qt Quick} 2.0 to work, a graphics driver that provides OpenGL 2.1 or
    higher is required. The default driver from Windows is OpenGL 1.1. Qt
    includes a version of the \l{ANGLE} project which is included from the
    Windows \l{Qt Installation Program}{Qt installers}. ANGLE implements the
    OpenGL ES 2.0 API on top of DirectX 9. ANGLE requires that the DirectX SDK
    is installed when building Qt.

    To use a custom version of ANGLE, set the \c ANGLE_DIR environment variable
    to point to the ANGLE source tree before building Qt.

    If you installed additional OpenGL drivers from your hardware vendor, then
    you may want to consider using this version of OpenGL instead of ANGLE. To
    use OpenGL, pass the command line options \c{-opengl desktop} to the
    configure script.

    \code
    configure -opengl desktop
    \endcode

    To use an OpenGL ES 2.0 emulator instead of ANGLE, use the configure
    options: \c{-opengl es2 -no-angle}.

    \code
    configure -opengl es2 -no-angle
    \endcode

    \section1 Building from Source

    These tools are not needed to run Qt 5 applications, but they are required
    for building Qt 5 from source.

    \list
        \li \l ActivePerl - Install a recent version of ActivePerl
            (\l{http://www.activestate.com/activeperl}{download page}) and add
           the installation location to your \c PATH.
        \li Python - Install Python from the \l{http://www.python.org/download/}{here}
           and add the installation location to your PATH in order to be able
           to build QtJsBackend and Qt WebKit.

        \li Install \l{http://www.ruby-lang.org}{Ruby} from \l{http://rubyinstaller.org/}{here}
           and add the installation location to your PATH in order to be able
           to build Qt WebKit.

    \endlist

    \note Please make sure that the \c perl executable from ActivePerl is found
           in the path before the perl executable provided by msysgit, since the
           latter is outdated.


    Qt WebKit and ANGLE depend on these extra tools from the \l{GnuWin32
    Project} which are provided for your convenience in the \e gnuwin32/bin
    folder:
    \list
        \li \l{http://gnuwin32.sourceforge.net/downlinks/bison.php}{Bison}
        \li \l{http://gnuwin32.sourceforge.net/downlinks/gperf.php}{GPerf}
        \li \l{http://gnuwin32.sourceforge.net/downlinks/flex.php}{Flex}
    \endlist

    The \e gnuwin32/bin folder should be added to the \c PATH variable.

    For instructions for building the Qt 5 source,read
    the \l{Qt for Windows - Building from Source} page.

    \section1 SDKs and Compilers

    A Windows SDK is required to develop Qt applications on Windows.

    \list
        \li Windows SDK 8 (with Visual Studio 2012 Express).
            As of Windows 8, the SDK no longer ships with a complete command-line build environment.
            You must install a compiler and build environment separately. If you require a
            complete development environment that includes compilers and a build environment,
            you can download Visual Studio 2012 Express, which includes the appropriate
            components of the Windows SDK.
            (\l{http://msdn.microsoft.com/en-us/windows/desktop/hh852363.aspx}{Download page})
        \li Windows SDK 7.1.
            Note that, as of 16.3.2012, if you use this SDK with Visual Studio 2010,
            installing the SDK requires installing the following packages
            in this order (see \e readme.html provided with the service pack):
            \list 1
                \li Install Visual Studio 2010
                \li Install Windows SDK 7.1
                \li Install Visual Studio 2010 SP1
                \li Install Visual C++ 2010 SP1 Compiler Update for the Windows SDK 7.1
            \endlist
        \li Windows SDK 7.
        \li A MinGW toolchain with g++ version 4.7 or higher. Qt 5 is tested regularly with a \
            \l{http://sourceforge.net/projects/mingwbuilds/files/host-windows/releases/4.8.0/32-bit/threads-posix/dwarf/x32-4.8.0-release-posix-dwarf-rev1.7z}
            {32 bit gcc 4.8.0 toolchain} from the \l{http://mingwbuilds.sourceforge.net}{MinGW-builds}
            project.

    \endlist

    For the most up to date information about the \l{Qt WebKit} dependencies,
    please refer to the \l{http://trac.webkit.org/wiki/BuildingQtOnWindows}{Qt WebKit Wiki for Windows}.

*/

/*!
    \page windows-issues.html
    \title Qt for Windows - Specific Issues
    \brief A description of issues with Qt that are specific to Windows.

    This page contains information about the \l{Qt for Windows}{Windows}
    platforms Qt.

    \section1 Windows XP

    \section2 Installation location

    Installing Qt into a directory with spaces, for example,
    \e{C:\\Program Files}, may cause linker errors like the following:
    \snippet snippets/code/doc_src_platform-notes.qdoc 2

    Install Qt into a sub-directory without spaces to avoid this problem.

    \section2 Possible GL conflict

    There is a known issue when running Microsoft NetMeeting, Lotus SameTime,
    and other applications that require screen grabbing while direct
    rendering is enabled. Other GL-applications may not work as expected,
    unless direct rendering is disabled.

    \section2 GCC (MinGW-builds)

    The minimum version of MinGW-builds supported is GCC 4.7.2.
    \l{http://sourceforge.net/projects/mingwbuilds/files/host-windows/releases/4.7.2/32-bit/threads-posix/sjlj/x32-4.7.2-release-posix-sjlj-rev8.7z}
    {MinGW-builds GCC 4.7.2 32 bit, rev 8} and later should be able
    to build Qt including Qt WebKit.

    For more information about the MinGW builds, visit the
    \e{Reference Configuration} section of the \l{Supported Platforms} page.

    \section2 Intel C++ Compiler (Windows, Altix)

    Qt has been tested successfully with:

    \list
    \li Windows - Intel(R) C++ Compiler for 32-bit applications,
       Version 9.1.040.
    \li Altix - Intel(R) C++ Itanium(R) Compiler for Itanium(R)-based
       applications Version 8.1 Build 20050406 Package ID: l_cc_pc_8.1.030
    \endlist

    \section2 Visual Studio

    The Visual C++ Linker doesn't understand filenames with spaces (for example,
    \e{C:\\Program files\\Qt\\}) so you will have to move it to another place,
    or explicitly set the path yourself.

    \snippet snippets/code/doc_src_compiler-notes.qdoc 0

    If you are experiencing strange problems with using special flags that
    modify the alignment of structure and union members (such as \c{/Zp2})
    then you will need to recompile Qt with the flags set for the
    application as well.

    Visual Studio 2010 should be updated to Service Pack 1. Otherwise, a
    problem when compiling Qt for 64-bit in release mode may occur (visit
    \l{http://support.microsoft.com/kb/2280741}).

    Consult the \l{Qt for Windows - Requirements} page for specific versions
    of the Windows SDK.
*/

/*!
    \page windows-deployment.html
    \title Qt for Windows - Deployment

    This documentation describes deployment issues for \l{Qt for
    Windows}{Windows}. We demonstrate the procedures in terms of
    deploying the \l {tools/plugandpaint}{Plug & Paint} application that is
    provided in Qt's examples directory.

    \section1 Static Linking

    To build static applications, build Qt statically by configuring Qt with
    \c -static:

    \snippet snippets/code/doc_src_deployment.qdoc 11

    If you later need to reconfigure and rebuild Qt from the
    same location, ensure that all traces of the previous configuration are
    removed by entering the build directory and running \c{nmake distclean} or
    \c{mingw32-make distclean} before running \c configure again.

    \section2 Linking the Application to the Static Version of Qt

    As an example, this section will build the \l{tools/plugandpaint}{Plug & Paint}
    example statically.

    Once Qt finishes building, build the \l{tools/plugandpaint}{Plug & Paint}
    application. First we must go into the directory that contains the
    application:

    \snippet snippets/code/doc_src_deployment.qdoc 13

    Run \c qmake to create a new makefile for the
    application, and perform a clean build to create the statically linked
    executable:

    \snippet snippets/code/doc_src_deployment.qdoc 14

    You probably want to link against the release libraries, and you can specify
    this when invoking \c qmake. Now, provided that everything compiled and
    linked without any errors, we should have a \c plugandpaint.exe file that is
    ready for deployment. To check that the application has the required
    libraries, copy the executable to a machine that does not have Qt or any Qt
    applications installed, and run it on that machine.

    Remember that if your application depends on compiler specific
    libraries, these must still be redistributed along with your
    application. You can check which libraries your application is
    linking against by using the \c depends tool. For more
    information, read the \l {Application Dependencies} section.

    Since we cannot deploy plugins using the static linking
    approach, the application we have prepared is incomplete. It will
    run, but the functionality will be disabled due to the missing
    plugins. To deploy plugin-based applications we should use the
    shared library approach.

    \section1 Shared Libraries

    We have two challenges when deploying the \l
    {tools/plugandpaint}{Plug & Paint} application using the shared
    libraries approach: The Qt runtime has to be correctly
    redistributed along with the application executable, and the
    plugins have to be installed in the correct location on the target
    system so that the application can find them.

    \section2 Building Qt as a Shared Library

    For this example, we assume that Qt is installed as a shared library,
    which is the default when installing Qt, in the \e{C:\\path\\to\\Qt}
    directory.

    \section2 Linking the Application to Qt as a Shared Library

    After ensuring that Qt is built as a shared library, we can build
    the \l {tools/plugandpaint}{Plug & Paint} application. First, we
    must go into the directory that contains the application:

    \snippet snippets/code/doc_src_deployment.qdoc 15

    Now run \c qmake to create a new makefile for the application, and
    do a clean build to create the dynamically linked executable:

    \snippet snippets/code/doc_src_deployment.qdoc 16

    This builds the core application, the following will build the
    plugins:

    \snippet snippets/code/doc_src_deployment.qdoc 17

    If everything compiled and linked without any errors, we will get
    a \c plugandpaint.exe executable and the \c pnp_basictools.dll and
    \c pnp_extrafilters.dll plugin files.

    \section2 Creating the Application Package

    To deploy the application, we must make sure that we copy the
    relevant Qt DLL (corresponding to the Qt modules used in
    the application) and the Windows platform plugin, \c {qwindows.dll},
    as well as the executable to the same directory tree in the \c release
    subdirectory.

    In contrast to user plugins, Qt plugins have to be put into subdirectories
    matching the plugin type. The correct location for the platform plugin
    is a subdirectory named \c {platforms}. \l{Qt Plugins} section has
    additional information about plugins and how Qt searches for them.

    Qt relies on the \l{ICU} library for unicode support. Therefore, you must
    include the ICU DLLs that are located in the \c bin directory of your Qt
    installation if Qt was configured to use ICU. The Qt version bundled in
    the Qt5 package uses ICU, so deployment is needed there. The ICU DLLs are
    version dependent and have to match the ones your Qt version was linked
    against.

    If you are using \l{ANGLE} (the default) then you additionally
    need to include both libEGL.dll and libGLESv2.dll from Qt's 'lib'
    directory as well as the HLSL compiler from DirectX. The HLSL
    compiler library is called d3dcompiler_XX.dll where XX is the
    version number that ANGLE (libGLESv2) was linked against.

    Remember that if your application depends on compiler specific
    libraries, these must be redistributed along with your
    application. You can check which libraries your application is
    linking against by using the \c depends tool. For more
    information, see the \l {Application Dependencies} section.

    We'll cover the plugins shortly, but first we'll check that the
    application will work in a deployed environment: Either copy the
    executable and the Qt DLLs to a machine that doesn't have Qt
    or any Qt applications installed, or if you want to test on the
    build machine, ensure that the machine doesn't have Qt in its
    environment.

    If the application starts without any problems, then we have
    successfully made a dynamically linked version of the \l
    {tools/plugandpaint}{Plug & Paint} application. But the
    application's functionality will still be missing since we have
    not yet deployed the associated plugins.

    Plugins work differently to normal DLLs, so we can't just
    copy them into the same directory as our application's executable
    as we did with the Qt DLLs.  When looking for plugins, the
    application searches in a \c plugins subdirectory inside the
    directory of the application executable.

    So to make the plugins available to our application, we have to
    create the \c plugins subdirectory and copy over the relevant DLLs:

    \snippet snippets/code/doc_src_deployment.qdoc 18

    An archive distributing all the Qt DLLs and application
    specific plugins required to run the \l {tools/plugandpaint}{Plug
    & Paint} application, would have to include the following files:

    \table 100%
    \header
        \li Component \li {2, 1} File Name
    \row
        \li The executable
        \li {2, 1} \c plugandpaint.exe
    \row
        \li The Basic Tools plugin
        \li {2, 1} \c plugins\pnp_basictools.dll
    \row
        \li The ExtraFilters plugin
        \li {2, 1} \c plugins\pnp_extrafilters.dll
    \row
        \li The Qt Windows platform plugin
        \li {2, 1} \c platforms\qwindows.dll
    \row
        \li The Qt Core module
        \li {2, 1} \c Qt5Core.dll
    \row
        \li The Qt GUI module
        \li {2, 1} \c Qt5Gui.dll
    \row
        \li The Qt Widgets module
        \li {2, 1} \c Qt5Widgets.dll
    \endtable

    In addition, the archive must contain the following compiler
    specific libraries depending on your version of Visual Studio:

    \table 100%
    \header
        \li \li VC++ 8.0 (2005) \li VC++ 9.0 (2008) \li VC++ 10.0 (2010)
    \row
        \li The C run-time
        \li \c msvcr80.dll
        \li \c msvcr90.dll
        \li \c msvcr100.dll
    \row
        \li The C++ run-time
        \li \c msvcp80.dll
        \li \c msvcp90.dll
        \li \c msvcp100.dll
    \endtable

    If ICU was used, the archive must contain:

    \table 100%
    \header
        \li{3,1} File Name
    \row
        \li icudtXX.dll
        \li icuinXX.dll
        \li icuucXX.dll
    \endtable

    Finally, if ANGLE was used, then the archive must additionally
    contain:

    \table 100%
    \header
        \li{3,1} File Name
    \row
        \li libEGL.dll
        \li libGLESv2.dll
        \li d3dcompiler_XX.dll
    \endtable

    To verify that the application now can be successfully deployed,
    you can extract this archive on a machine without Qt and without
    any compiler installed, and try to run it.

    An alternative to putting the plugins in the plugins subdirectory
    is to add a custom search path when you start your application
    using QApplication::addLibraryPath() or
    QApplication::setLibraryPaths().

    \snippet snippets/code/doc_src_deployment.cpp 19

    One benefit of using plugins is that they can easily be made
    available to a whole family of applications.

    It's often most convenient to add the path in the application's \c
    main() function, right after the QApplication object is
    created. Once the path is added, the application will search it
    for plugins, in addition to looking in the \c plugins subdirectory
    in the application's own directory. Any number of additional paths
    can be added.

    \section2 Manifest files

    When deploying an application compiled with Visual Studio 2005 onwards,
    there are some additional steps to be taken.

    First, we need to copy the manifest file created when linking the
    application. This manifest file contains information about the
    application's dependencies on side-by-side assemblies, such as the runtime
    libraries.

    The manifest file needs to be copied into the \b same folder as the
    application executable. You do not need to copy the manifest files for
    shared libraries (DLLs), since they are not used.

    If the shared library has dependencies that are different from the
    application using it, the manifest file needs to be embedded into the DLL
    binary. Since Qt 4.1.3, the follwoing \c CONFIG options are available for
    embedding manifests:

    \snippet snippets/code/doc_src_deployment.qdoc 20

    To use the options, add

    \snippet snippets/code/doc_src_deployment.pro 21

    to your .pro file. The \c embed_manifest_dll option is enabled by default.
    The \c embed_manifest_exe option is NOT enabled by default.

    You can find more information about manifest files and side-by-side
    assemblies at the
    \l {http://msdn.microsoft.com/en-us/library/aa376307.aspx}{MSDN website}.

    The correct way to include the runtime libraries with your application
    is to ensure that they are installed on the end-user's system.

    To install the runtime libraries on the end-user's system, you need to
    include the appropriate Visual C++ Redistributable Package (VCRedist)
    executable with your application and ensure that it is executed when the
    user installs your application.

    For example, on an 32-bit x86-based system, you would include the
    \l{http://www.microsoft.com/downloads/details.aspx?FamilyId=32BC1BEE-A3F9-4C13-9C99-220B62A191EE}{vcredist_x86.exe}
    executable. The \l{http://www.microsoft.com/downloads/details.aspx?familyid=526BF4A7-44E6-4A91-B328-A4594ADB70E5}{vcredist_IA64.exe}
    and \l{http://www.microsoft.com/downloads/details.aspx?familyid=90548130-4468-4BBC-9673-D6ACABD5D13B}{vcredist_x64.exe}
    executables provide the appropriate libraries for the IA64 and 64-bit x86
    architectures, respectively.

    \note The application you ship must be compiled with exactly the same
    compiler version against the same C runtime version. This prevents
    deploying errors caused by different versions of the C runtime libraries.

    \section2 Manual installations with Visual Studio 2008 and 2010

    As well as the above details for VS 2005 and onwards, Visual Studio 2008/2010
    applications may have problems when deploying manually, say to a USB
    stick.

    The recommended procedure is to configure Qt with the \c -plugin-manifests
    option using the 'configure' tool. Then follow the \l {http://msdn.microsoft.com/en-us/library/ms235291(VS.80).aspx}{guidelines}
    for manually deploying private assemblies.

    In brief the steps are

    \list 1

        \li create a folder structure on the development computer that will match the target USB stick directory structure, for example '\\app' and for your dlls, '\\app\\lib'.

        \li on the development computer, from the appropriate 'redist' folder copy over Microsoft.VC80.CRT and Microsoft.VC80.MFC to the directories '\\app' and '\\app\\lib' on the development PC.

        \li xcopy the \\app folder to the target USB stick.
    \endlist

    Your application should now run. Also be aware that even with a service
    pack installed the Windows DLLs that are linked to will be the defaults. See
    the information on \l {http://msdn.microsoft.com/en-us/library/cc664727.aspx}{how to select the appropriate target DLLs}.

    \section1 Application Dependencies

    \section2 Additional Libraries

    Depending on configuration, compiler specific libraries must be
    redistributed along with your application.

    For example, if Qt is built using \l{ANGLE}, its shared libraries
    and the required shared libraries of the \l{Direct X SDK} need to
    be shipped as well.

    You can check which
    libraries your application is linking against by using the
    \l{Dependency Walker} tool. All you need to do is to run it like
    this:

    \snippet snippets/code/doc_src_deployment.qdoc 24

    This will provide a list of the libraries that your application
    depends on and other information.

    \image deployment-windows-depends.png

    When looking at the release build of the Plug & Paint executable
    (\c plugandpaint.exe) with the \c depends tool, the tool lists the
    following immediate dependencies to non-system libraries:

    \table 100%
        \header
            \li Qt
            \li VC++ 8.0 (2005)
            \li VC++ 9.0 (2008)
            \li VC++ 10.0 (2010)
            \li MinGW
        \row
        \li \list
               \li QT5CORE.DLL - The QtCore runtime
               \li QT5GUI.DLL - The QtGui runtime
               \li QT5WIDGETS.DLL - The QtWidgets runtime
           \endlist
        \li \list
               \li MSVCR80.DLL - The C runtime
               \li MSVCP80.DLL - The C++ runtime
           \endlist
        \li \list
               \li MSVCR90.DLL - The C runtime
               \li MSVCP90.DLL - The C++ runtime
           \endlist
        \li \list
               \li MSVCR100.DLL - The C runtime
               \li MSVCP100.DLL - The C++ runtime
           \endlist
        \li \list
               \li MINGWM10.DLL - The MinGW run-time
               \li LIBGCC_S_DW2-1.DLL
               \li LIBSTDC++-6.dll
           \endlist
    \endtable

    When looking at the plugin DLLs the exact same dependencies
    are listed.

    \section2 Qt Plugins

    All Qt GUI applications require a plugin that implements the \l {Qt
    Platform Abstraction} (QPA) layer in Qt 5. For Windows, the name of the
    platform plugin is \c {qwindows.dll}. This file must be located within a
    specific subdirectory (by default, \c platforms) under your distribution
    directory. Alternatively, it is possible to adjust the search path Qt
    uses to find its plugins, as described below.

    Your application may also depend on one or more Qt plugins, such
    as the print support plugin, the JPEG image format plugin or a SQL driver
    plugin. Be sure to distribute any Qt plugins that you need with your
    application. Similar to the platform plugin, each type of plugin must
    be located within a specific subdirectory (such as \c printsupport,
    \c imageformats or \c sqldrivers) within your distribution directory.

    \note If you are deploying an application that uses Qt WebKit to display
    HTML pages from the World Wide Web, you should include all text codec
    plugins to support as many HTML encodings possible.

    The search path for Qt plugins is hard-coded into the QtCore library.
    By default, the plugins subdirectory of the Qt installation is the first
    plugin search path. However, pre-determined paths like the default one
    have certain disadvantages. For example, they may not exist on the target
    machine. For that reason, you need to examine various alternatives to make
    sure that the Qt plugins are found:

    \list

    \li \l{qt-conf.html}{Using \c qt.conf}. This approach is the recommended
    if you have executables in different places sharing the same plugins.

    \li Using QApplication::addLibraryPath() or
    QApplication::setLibraryPaths(). This approach is recommended if you only
    have one executable that will use the plugin.

    \li Using a third party installation utility to change the
    hard-coded paths in the QtCore library.

    \endlist

    If you add a custom path using QApplication::addLibraryPath it could
    look like this:

    \snippet snippets/code/doc_src_deployment.qdoc 54

    Then qApp->libraryPaths() would return something like this:

    \list
    \li \c{C:/customPath/plugins}
    \li \c{C:/Qt/5.2.1/plugins}
    \li \c{E:/myApplication/directory}
    \endlist

    The executable will look for the plugins in these directories and
    the same order as the QStringList returned by qApp->libraryPaths().
    The newly added path is prepended to the qApp->libraryPaths() which
    means that it will be searched through first. However, if you use
    qApp->setLibraryPaths(), you will be able to determine which paths
    and in which order they will be searched.

    The \l{How to Create Qt Plugins} document outlines the issues you
    need to pay attention to when building and deploying plugins for
    Qt applications.

*/

/*!
    \page windows-building.html
    \title Qt for Windows - Building from Source
    \brief Configuring and building Qt for Windows.

    This page describes the process of configuring and building
    \l{Qt for Windows}. Before building, there are some requirements that are
    given in more detail in the \l{Qt for Windows - Requirements} document.
    A binary package is available and the \l{Qt Installation Program} page
    describes the installation in more detail.

    \section1 Step 1: Install the License File (commercial editions only)

        If you have the commercial edition of Qt, copy the license file
        from your account on the distribution server into your home directory
        (this may be known as the \c userprofile environment variable) and
        rename it to \c{.qt-license}. This renaming process must be done
        using a \e{command prompt} on Windows, \b{not} with Windows Explorer.
        For example on Windows 2000, \c{%USERPROFILE%} should be something
        like \c{C:\Documents and Settings\username}

        For the open source version you do not need a license file.

    \section1 Step 2: Unpack the Archive

        Uncompress the files into the directory you want Qt installed;
        e.g. \c{C:\Qt\5.2.1}.

        \note The install path must not contain any spaces or Windows specific
        file system characters.

    \section1 Step 3: Set the Environment variables

        We recommend creating a desktop link that opens a command
        prompt with the environment set up similar to the
        \uicontrol{Command Prompt} menu entries provided by the Windows SDKs.
        This is done by creating an application link passing a \c .cmd file setting
        up the environment and the command line option \c /k (remain open)
        to \c cmd.exe.

        Assuming the file is called \c{qt5vars.cmd}
        and the Qt folder is called \c qt-5 and located under \c C:\qt:

        \code
        REM Set up Windows SDK for 64bit
        CALL "C:\Program Files (x86)\MSVC10\VC\vcvarsall.bat" amd64
        set PATH=c:\qt\qt-5\qtbase\bin;c:\qt\qt-5\qtrepotools\bin;c:\qt\qt-5\gnuwin32\bin;%PATH%
        set QMAKESPEC=win32-msvc2010
        \endcode

        A desktop link can then be created by specifying the command
        \c{%SystemRoot%\system32\cmd.exe /E:ON /V:ON  /k c:\qt\qt5vars.cmd}
        as application and \c{c:\qt\qt-5} as working directory.

        \note Setups for MinGW are similar; they differ
        only in that the \c bin folder of the installation should be added to the
        path instead of calling the Windows SDK setup script. For MinGW, please make
        sure that no \c sh.exe can be found in the path, as it affects \c {mingw32-make}.

        Settings required by the additional libraries (see \l{Qt for Windows Requirements})
        should also go this file below the call to the Windows SDK setup script.

    \section1 Step 4: Build the Qt Library

        The default behavior of configure is to create an in-source build
        of Qt 5. If you want to install Qt 5 to a separate location,
        you need to specify the command line option \c{-prefix <location>}.
        Alternatively, the command line option \c -developer-build creates
        an in-source build for developer usage.

        To configure the Qt library for a debug build for your machine, type
        the following command in the command prompt:

        \code
        configure -debug -nomake examples -opensource
        \endcode

        The \l{Qt Configure Options}{Configure Options} page contains more
        information about the configure options.

        To build Qt using \l{jom}, type:

        \code
        jom
        \endcode

        If you do not have \l{jom} installed, type:

        \code
        nmake
        \endcode

        For MinGW, type:

        \code
        mingw32-make
        \endcode

        If an installation prefix was given, type
        \c{jom install}, \c{nmake install} or \c{mingw32-make install}.

        \note If you later need to reconfigure and rebuild Qt from the
        same location, ensure that all traces of the previous configuration are
        removed by entering the build directory and typing \c{nmake distclean}
        before running \c configure again.

    \section1 Parallel Builds

        \l{jom} is a replacement for \c nmake which makes use of all CPU cores
        and thus speeds up building.

*/
