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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#windows-vista-windows-7-windows-8">Windows Vista, Windows 7, Windows 8</a></li>
<li class="level1"><a href="#windows-xp">Windows XP</a></li>
<li class="level2"><a href="#installation-location">Installation location</a></li>
<li class="level2"><a href="#possible-gl-conflict">Possible GL conflict</a></li>
<li class="level2"><a href="#gcc-mingw-builds">GCC (MinGW-builds)</a></li>
<li class="level2"><a href="#intel-c-compiler-windows-altix">Intel C++ Compiler (Windows, Altix)</a></li>
<li class="level2"><a href="#visual-studio-windows">Visual Studio (Windows)</a></li>
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<h1 class="title">Platform and Compiler Notes - Windows</h1>
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<p>This page contains information about the Windows platforms Qt is currently known to run on, with links to platform-specific notes. More information about the combinations of platforms and compilers supported by Qt can be found on the <a href="supported-platforms.html">Supported Platforms</a> page.</p>
<a name="windows-vista-windows-7-windows-8"></a>
<h2>Windows Vista, Windows 7, Windows 8</h2>
<p>At the time Qt 5.1.1 was released, there were no known issues on these platforms.</p>
<a name="windows-xp"></a>
<h2>Windows XP</h2>
<a name="installation-location"></a>
<h3>Installation location</h3>
<p>Installing Qt into a directory with spaces, e.g. C:\Program Files, may cause linker errors like the following:</p>
<pre class="cpp">c:\program<span class="operator">.</span>obj <span class="keyword">not</span> found</pre>
<p>Install Qt into a subdirectory without spaces to avoid this problem.</p>
<a name="possible-gl-conflict"></a>
<h3>Possible GL conflict</h3>
<p>There is a known issue with 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.</p>
<a name="gcc-mingw-builds"></a>
<h3>GCC (MinGW-builds)</h3>
<p>We have tested Qt with this compiler on Windows 7. The minimum version of <a href="http://www.mingw.org/">MinGW</a>-builds supported is GCC 4.7.2. <a href="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</a> and later should be able to build Qt including QtWebKit.</p>
<a name="intel-c-compiler-windows-altix"></a>
<h3>Intel C++ Compiler (Windows, Altix)</h3>
<p>Qt has been tested successfully with:</p>
<ul>
<li>Windows - Intel(R) C++ Compiler for 32-bit applications, Version 9.1.040.</li>
<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</li>
</ul>
<a name="visual-studio-windows"></a>
<h3>Visual Studio (Windows)</h3>
<p>We do most of our Windows development on Windows 7, using Microsoft Visual Studio 2008, Visual Studio 2010 or Visual Studio 11 (mostly 64bit).</p>
<p>We recommend using Visual Studio 2010 or higher as it supports some C++11 features beneficial to performance and memory usage.</p>
<p>Qt works with all editions of Visual Studio.</p>
<p>In order to use Qt with the Visual Studio Express Editions you need to download and install the Windows SDK.</p>
<p>The Visual C++ Linker doesn't understand filenames with spaces (as in <tt>C:\Program files\Qt\</tt>) so you will have to move it to another place, or explicitly set the path yourself; for example:</p>
<pre class="cpp">QTDIR<span class="operator">=</span>C:\Progra<span class="operator">~</span><span class="number">1</span>\<span class="type">Qt</span></pre>
<p>If you are experiencing strange problems with using special flags that modify the alignment of structure and union members (such as <tt>/Zp2</tt>) then you will need to recompile Qt with the flags set for the application as well.</p>
<p>Visual Studio 2010 should be updated to Service Pack 1. Otherwise, a problem when compiling Qt for 64-bit in release mode may occur (see http://support.microsoft.com/kb/2280741).</p>
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