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<H1><A NAME="SECTION003500000000000000000"></A><A NAME="compilation"></A>
<BR>
1.5 Compilation and Linkage

</H1>

<P>
There are two more things to do before you can use your new extension:
compiling and linking it with the Python system.  If you use dynamic
loading, the details may depend on the style of dynamic loading your
system uses; see the chapters about building extension modules
(chapter <A href="building.html#building">3</A>) and additional information that pertains only
to building on Windows (chapter <A href="building-on-windows.html#building-on-windows">4</A>) for more
information about this.

<P>
If you can't use dynamic loading, or if you want to make your module a
permanent part of the Python interpreter, you will have to change the
configuration setup and rebuild the interpreter.  Luckily, this is
very simple on <span class="Unix">Unix</span>: just place your file (<span class="file">spammodule.c</span> for
example) in the <span class="file">Modules/</span> directory of an unpacked source
distribution, add a line to the file <span class="file">Modules/Setup.local</span>
describing your file:

<P>
<div class="verbatim"><pre>
spam spammodule.o
</pre></div>

<P>
and rebuild the interpreter by running <b class="program">make</b> in the toplevel
directory.  You can also run <b class="program">make</b> in the <span class="file">Modules/</span>
subdirectory, but then you must first rebuild <span class="file">Makefile</span>
there by running `<b class="program">make</b> Makefile'.  (This is necessary each
time you change the <span class="file">Setup</span> file.)

<P>
If your module requires additional libraries to link with, these can
be listed on the line in the configuration file as well, for instance:

<P>
<div class="verbatim"><pre>
spam spammodule.o -lX11
</pre></div>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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