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<section id="building-c-and-c-extensions">
<span id="building"></span><h1>Building C and C++ Extensions<a class="headerlink" href="#building-c-and-c-extensions" title="Link to this heading">¶</a></h1>
<p>A C extension for CPython is a shared library (for example, a <code class="docutils literal notranslate"><span class="pre">.so</span></code> file on
Linux, <code class="docutils literal notranslate"><span class="pre">.pyd</span></code> on Windows), which exports an <em>initialization function</em>.</p>
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<p>Building, packaging and distributing extension modules is best done with
third-party tools, and is out of scope of this document.
One suitable tool is Setuptools, whose documentation can be found at
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<p>The <a class="reference internal" href="../library/distutils.html#module-distutils" title="distutils: Removed in 3.12. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">distutils</span></code></a> module, which was included in the standard library
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