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<li><a href="index.html">Qt 5.5</a></li>
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<li id="buildversion">Qt 5.5.1 Reference Documentation</li>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#step-1-installing-the-license-file-commercial-editions-only">Step 1: Installing the License File (Commercial Editions Only)</a></li>
<li class="level1"><a href="#step-2-unpacking-the-archive">Step 2: Unpacking the Archive</a></li>
<li class="level1"><a href="#step-3-building-the-library">Step 3: Building the Library</a></li>
<li class="level1"><a href="#step-4-set-the-environment-variables">Step 4: Set the Environment Variables</a></li>
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<h1 class="title">Qt for Linux/X11 - Building from Source</h1>
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<p>You can download the Qt 5 sources from the <a href="http://qt.io/download">Downloads</a> page. For more information, visit the <a href="gettingstarted.html">Getting Started with Qt</a> page.</p>
<p>Qt for X11 has some requirements that are given in more detail in the <a href="linux-requirements.html">Qt for X11 Requirements</a> document.</p>
<a name="step-1-installing-the-license-file-commercial-editions-only"></a>
<h2 id="step-1-installing-the-license-file-commercial-editions-only">Step 1: Installing the License File (Commercial Editions Only)</h2>
<p>If you have the commercial edition of Qt, install your license file as <code>$HOME/.qt-license</code>.</p>
<p>For the open source version you do not need a license file.</p>
<a name="step-2-unpacking-the-archive"></a>
<h2 id="step-2-unpacking-the-archive">Step 2: Unpacking the Archive</h2>
<p>Unpack the archive if you have not done so already. For example, if you have the <code>qt-everywhere-opensource-src-5.5.1.tar.gz</code> package, type the following commands at a command line prompt:</p>
<pre class="cpp">cd <span class="operator">/</span>tmp
gunzip qt<span class="operator">-</span>everywhere<span class="operator">-</span>opensource<span class="operator">-</span>src<span class="operator">-</span><span class="number">5.5.1.tar.gz</span> <span class="preprocessor"># uncompress the archive</span>
tar xvf qt<span class="operator">-</span>everywhere<span class="operator">-</span>opensource<span class="operator">-</span>src<span class="operator">-</span><span class="number">5.5.1.tar</span> <span class="preprocessor"># unpack it</span></pre>
<p>This creates the directory <code>/tmp/qt-everywhere-opensource-src-5.5.1</code> containing the files from the archive. We only support the GNU version of the tar archiving utility. Note that on some systems it is called gtar.</p>
<a name="step-3-building-the-library"></a>
<h2 id="step-3-building-the-library">Step 3: Building the Library</h2>
<p>To configure the Qt library for your machine type, run the <code>./configure</code> script in the package directory.</p>
<p>By default, Qt is configured for installation in the <code>/usr/local/Qt-5.5.1</code> directory, but this can be changed by using the <code>-prefix</code> option.</p>
<pre class="cpp">cd <span class="operator">/</span>tmp<span class="operator">/</span>qt<span class="operator">-</span>everywhere<span class="operator">-</span>opensource<span class="operator">-</span>src<span class="operator">-</span><span class="number">5.5.1</span>
<span class="operator">.</span><span class="operator">/</span>configure</pre>
<p>The <a href="configure-options.html">Configure Options</a> page contains more information about the configure options.</p>
<p>To create the library and compile all the examples, tools, and tutorials, type:</p>
<pre class="cpp">make</pre>
<p>If <code>-prefix</code> is outside the build directory, you need to install the library, examples, tools, and tutorials in the appropriate place. To do this (as root if necessary), type:</p>
<pre class="cpp">make install</pre>
<p>Note that on some systems the make utility is named differently, e.g. gmake. The configure script tells you which make utility to use.</p>
<p><b>Note:</b> 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 <code>make confclean</code> before running <code>configure</code> again.</p>
<a name="step-4-set-the-environment-variables"></a>
<h2 id="step-4-set-the-environment-variables">Step 4: Set the Environment Variables</h2>
<p>In order to use Qt, some environment variables needs to be extended.</p>
<pre class="cpp">PATH <span class="operator">-</span> to locate qmake<span class="operator">,</span> moc and other <span class="type"><a href="../qtcore/qt.html">Qt</a></span> tools</pre>
<p>This is done like this:</p>
<p>In <code>.profile</code> (if your shell is bash, ksh, zsh or sh), add the following lines:</p>
<pre class="cpp">PATH<span class="operator">=</span><span class="operator">/</span>usr<span class="operator">/</span>local<span class="operator">/</span><span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">-</span><span class="number">5.5.1</span><span class="operator">/</span>bin:$PATH
<span class="keyword">export</span> PATH</pre>
<p>In <code>.login</code> (in case your shell is csh or tcsh), add the following line:</p>
<pre class="cpp">setenv PATH <span class="operator">/</span>usr<span class="operator">/</span>local<span class="operator">/</span><span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">-</span><span class="number">5.5.1</span><span class="operator">/</span>bin:$PATH</pre>
<p>If you use a different shell, please modify your environment variables accordingly.</p>
<p>For compilers that do not support rpath you must also extended the <code>LD_LIBRARY_PATH</code> environment variable to include <code>/usr/local/Qt-5.5.1/lib</code>. On Linux with GCC this step is not needed.</p>
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