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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Appendix A. Build Dependencies</title><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="home" href="index.html" title="Debian Python Policy" /><link rel="up" href="index.html" title="Debian Python Policy" /><link rel="prev" href="other.html" title="Chapter 6. Interaction with Locally Installed Python Versions" /><link rel="next" href="packaging_tools.html" title="Appendix B. Packaging Tools" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Appendix A. Build Dependencies</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="other.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="packaging_tools.html">Next</a></td></tr></table><hr /></div><div class="appendix"><div class="titlepage"><div><div><h1 class="title"><a id="build_dependencies"></a>Appendix A. Build Dependencies</h1></div></div></div><p>
	Build dependencies for Python-dependent packages must be declared
	for every Python version that the package is built for.
      </p><p>
	The <code class="literal">python3-all-dev</code> should be used when building
	extensions for any or all Python 3 versions.
	The <code class="literal">python-all-dev</code> should be used when building
	extensions for any or all Python 2 versions. To build for a specific
	version or versions, declare <code class="literal">Build-Depends</code> on
	<code class="literal">python<em class="replaceable"><code>X</code></em>.<em class="replaceable"><code>Y</code></em>-dev</code>.
      </p><p>
	Some applications and pure Python modules may be able to avoid
	dependency on the <code class="literal">-dev</code> packages, and declare
	<code class="literal">Build-Depends</code> on the runtime environment only
	(<code class="literal">python3</code>, <code class="literal">python3-all</code>,
	<code class="literal">python2</code>, <code class="literal">python2-all</code>). A package
	that does not require the <code class="literal">-dev</code> packages must not
	declare <code class="literal">Build-Depends</code> on them.
      </p><p>
	Declare <code class="literal">Build-Depends</code> on at least:
	</p><pre class="programlisting">
Build-Depends: python2.7
Build-Depends: python2.6 (&gt;= 2.6-1)
Build-Depends: python (&gt;= 2.6.6-9)
Build-Depends: python-all

Build-Depends: python2.7-dev
Build-Depends: python3.5-dev (&gt;= 3.5.1-1)
Build-Depends: python-dev (&gt;= 2.6.6-9)
Build-Depends: python-all-dev
Build-Depends: python3-all-dev (&gt;= 3.2)
	</pre><p>
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