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<div class="section" id="building-your-extension-with-distutils">
<span id="ref-distutils"></span><h1>Building Your Extension with distutils<a class="headerlink" href="#building-your-extension-with-distutils" title="Permalink to this headline">ΒΆ</a></h1>
<p>To build the example in <a class="reference external" href="using.html#ref-simple-c-example"><em>A Simple C++ Example</em></a> using distutils, it is
sufficient to create a standard <tt class="docutils literal"><span class="pre">setup.py</span></tt>, listing <tt class="docutils literal"><span class="pre">word.sip</span></tt> among the
files to build, and hook-up SIP into distutils:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">distutils.core</span> <span class="kn">import</span> <span class="n">setup</span><span class="p">,</span> <span class="n">Extension</span>
<span class="kn">import</span> <span class="nn">sipdistutils</span>
<span class="n">setup</span><span class="p">(</span>
<span class="n">name</span> <span class="o">=</span> <span class="s">'word'</span><span class="p">,</span>
<span class="n">versione</span> <span class="o">=</span> <span class="s">'1.0'</span><span class="p">,</span>
<span class="n">ext_modules</span><span class="o">=</span><span class="p">[</span>
<span class="n">Extension</span><span class="p">(</span><span class="s">"word"</span><span class="p">,</span> <span class="p">[</span><span class="s">"word.sip"</span><span class="p">,</span> <span class="s">"word.cpp"</span><span class="p">]),</span>
<span class="p">],</span>
<span class="n">cmdclass</span> <span class="o">=</span> <span class="p">{</span><span class="s">'build_ext'</span><span class="p">:</span> <span class="n">sipdistutils</span><span class="o">.</span><span class="n">build_ext</span><span class="p">}</span>
<span class="p">)</span>
</pre></div>
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<p>As we can see, the above is a normal distutils setup script, with just a
special line which is needed so that SIP can see and process <tt class="docutils literal"><span class="pre">word.sip</span></tt>.
Then, running <tt class="docutils literal"><span class="pre">setup.py</span> <span class="pre">build</span></tt> will build our extension module.</p>
<p>If you want to use any of sip’s command-line options described in
<a class="reference external" href="command_line.html#ref-command-line"><em>The SIP Command Line</em></a>, there is a new option available for the
<tt class="docutils literal"><span class="pre">build_ext</span></tt> command in distutils: <tt class="docutils literal"><span class="pre">--sip-opts</span></tt>. So you can either invoke
distutils as follows:</p>
<div class="highlight-python"><pre>$ python setup.py build_ext --sip-opts="-e -g" build</pre>
</div>
<p>or you can leverage distutils’ config file support by creating a <tt class="docutils literal"><span class="pre">setup.cfg</span></tt>
file in the supported system or local paths (eg: in the same directory of
<tt class="docutils literal"><span class="pre">setup.py</span></tt>) with these contents:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">[</span><span class="n">build_ext</span><span class="p">]</span>
<span class="n">sip</span><span class="o">-</span><span class="n">opts</span> <span class="o">=</span> <span class="o">-</span><span class="n">e</span> <span class="o">-</span><span class="n">g</span>
</pre></div>
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<p>and then run <tt class="docutils literal"><span class="pre">setup.py</span> <span class="pre">build</span></tt> as usual.</p>
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