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<title>2.2.1 Running ./configure</title>
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<H2><A NAME="SECTION004210000000000000000"></A><A NAME="inst-configure"></A>
<a id='l2h-4' xml:id='l2h-4'></a>
<BR>
2.2.1 Running ./configure
</H2>
<P>
The <b class="program">./configure</b> script will analyze your environment and create custom
Makefiles particular to your system. Aside from all the standard
autoconf stuff, <b class="program">./configure</b> does the following:
<P>
<UL>
<LI><a id='l2h-5' xml:id='l2h-5'></a>
Finds out whether a program called <b class="program">apxs</b> is available. This
program is part of the standard Apache distribution, and is necessary
for DSO compilation. If apxs cannot be found in your <a class="envvar" id='l2h-6' xml:id='l2h-6'>PATH</a> or in
<span class="file">/usr/local/apache/bin</span>, DSO compilation will not be available.
<P>
You can manually specify the location of apxs by using the
<b class="programopt">--with-apxs</b> option, e.g.:
<P>
<div class="verbatim"><pre>
$ ./configure --with-apxs=/usr/local/apache/bin/apxs
</pre></div>
<P>
It is recommended that you specify this option.
<P>
</LI>
<LI><a id='l2h-7' xml:id='l2h-7'></a>
Checks your Python version and attempts to figure out where
<b class="program">libpython</b> is by looking at various parameters compiled into
your Python binary. By default, it will use the <b class="program">python</b>
program found in your <a class="envvar" id='l2h-8' xml:id='l2h-8'>PATH</a>.
<P>
<a id='l2h-9' xml:id='l2h-9'></a>
If the first Python binary in the path is not suitable or not the one
desired for mod_python, you can specify an alternative location with the
<b class="programopt">--with-python</b> option, e.g:
<P>
<div class="verbatim"><pre>
$ ./configure --with-python=/usr/local/bin/python2.3
</pre></div>
<P>
</LI>
<LI><a id='l2h-10' xml:id='l2h-10'></a>
Sets the directory for the apache mutex locks. The default is
<span class="file">/tmp</span>. The directory must exist and be writable by the
owner of the apache process.
<P>
Use <b class="programopt">--with-mutex-dir</b> option, e.g:
<P>
<div class="verbatim"><pre>
$ ./configure --with-mutex-dir=/var/run/mod_python
</pre></div>
<P>
The mutex directory can also be specified in using a
<em class="citetitle"><a
href="dir-other-po.html"
title="PythonOption"
>PythonOption</a></em> directive.
See <em class="citetitle"><a
href="inst-apacheconfig.html"
title="Configuring Apache"
>Configuring Apache</a></em>.
<P>
New in version 3.3.0
<P>
</LI>
<LI><a id='l2h-11' xml:id='l2h-11'></a>
Sets the maximum number of locks reserved by mod_python.
<P>
The mutexes used for locking are a limited resource on some
systems. Increasing the maximum number of locks may increase performance
when using session locking. The default is 8. A reasonable number for
higher performance would be 32.
Use <b class="programopt">--with-max-locks</b> option, e.g:
<P>
<div class="verbatim"><pre>
$ ./configure --with-max-locks=32
</pre></div>
<P>
The number of locks can also be specified in using a
<em class="citetitle"><a
href="dir-other-po.html"
title="PythonOption"
>PythonOption</a></em> directive.
See <em class="citetitle"><a
href="inst-apacheconfig.html"
title="Configuring Apache"
>Configuring Apache</a></em>.
<P>
New in version 3.2.0
<P>
</LI>
<LI><a id='l2h-12' xml:id='l2h-12'></a>
Attempts to locate <b class="program">flex</b> and determine its version.
If <b class="program">flex</b> cannot be found in your <a class="envvar" id='l2h-13' xml:id='l2h-13'>PATH</a> <b class="program">configure</b>
will fail. If the wrong version is found <b class="program">configure</b> will generate a warning.
You can generally ignore this warning unless you need to re-create
<span class="file">src/psp_parser.c</span>.
<P>
The parser used by psp (See <A href="pyapi-psp.html#pyapi-psp">4.9</A>) is written in C generated using
<b class="program">flex</b>. This requires a reentrant version of <b class="program">flex</b> which
at this time is 2.5.31. Most platforms however ship with version 2.5.4
which is not suitable, so a pre-generated copy of psp_parser.c is included
with the source. If you do need to compile <span class="file">src/psp_parser.c</span> you
must get the correct <b class="program">flex</b> version.
<P>
<a id='l2h-14' xml:id='l2h-14'></a>
If the first flex binary in the path is not suitable or not the one desired
you can specify an alternative location with the <b class="programopt">--with-flex</b>
option, e.g:
<P>
<div class="verbatim"><pre>
$ ./configure --with-flex=/usr/local/bin/flex
</pre></div>
<P>
New in version 3.2.0
<P>
</LI>
<LI><a id='l2h-15' xml:id='l2h-15'></a>
The python source is required to build the mod_python documentation.
<P>
<a id='l2h-16' xml:id='l2h-16'></a>
You can safely ignore this option unless you want to build the the
documentation. If you want to build the documentation, specify the path
to your python source with the <b class="programopt">--with-python-src</b> option, eg.
<P>
<div class="verbatim"><pre>
$ ./configure --with-python-src=/usr/src/python2.3
</pre></div>
<P>
New in version 3.2.0
<P>
</LI>
</UL>
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<span class="release-info">Release 3.3.1, documentation updated on January 29, 2007.</span>
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