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<a name="texi2any-Environment-Variables"></a>
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<p>
Next: <a href="texi2any-Printed-Output.html#texi2any-Printed-Output" accesskey="n" rel="next"><code>texi2any</code> Printed Output</a>, Previous: <a href="Invoking-texi2any.html#Invoking-texi2any" accesskey="p" rel="prev">Invoking <code>texi2any</code></a>, Up: <a href="Generic-Translator-texi2any.html#Generic-Translator-texi2any" accesskey="u" rel="up">Generic Translator <code>texi2any</code></a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html#Command-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Environment-Variables-Recognized-by-texi2any"></a>
<h3 class="section">20.3 Environment Variables Recognized by <code>texi2any</code></h3>
<a name="index-TEXINFO_005fOUTPUT_005fFORMAT"></a>
<a name="index-Environment-variable-TEXINFO_005fOUTPUT_005fFORMAT"></a>
<p><code>makeinfo</code> also reads the environment variable
<code>TEXINFO_OUTPUT_FORMAT</code> to determine the output format, if not
overridden by a command line option. The value should be one of:
</p>
<div class="example">
<pre class="example">docbook dvi dvipdf html info pdf plaintext ps xml
</pre></div>
<p>If not set or otherwise specified, Info output is the default.
</p>
<p>The customization variable of the same name is also read; if set, that
overrides an environment variable setting, but not a command-line
option. See <a href="Customization-Variables-and-Options.html#Customization-Variables-and-Options">Customization Variables and Options</a>.
</p>
<a name="index-TEXINFO_005fXS"></a>
<a name="index-Perl-extension-modules-_0028XS_0029"></a>
<p>You can control <code>texi2any</code>’s use of Perl extension modules
by setting the <code>TEXINFO_XS</code> environment variable. These modules
are compiled native code that the interpreted Perl code can use.
Ideally, these extension modules should just work, and the only noticable
difference they should make is that <code>texi2any</code> finishes running
sooner. However, you can use this environment variable for the purposes
of troubleshooting: for example, if you have problems with the output of
<code>texi2any</code> varying depending on whether the extension modules are
in use.
</p>
<p>The following values of <code>TEXINFO_XS</code> are recognized by
<code>texi2any</code>:
</p>
<dl compact="compact">
<dt>‘<samp>default</samp>’</dt>
<dd><p>The default behavior. Try to load extension modules, and silently fall
back to the interpreted Perl implementations if this fails.
</p>
</dd>
<dt>‘<samp>warn</samp>’</dt>
<dd><p>Try to load extension modules, and if this fails, give a warning message
before falling back to the interpreted Perl implementations.
</p>
</dd>
<dt>‘<samp>debug</samp>’</dt>
<dd><p>Try to load extension modules, printing many messages while doing so.
</p>
</dd>
<dt>‘<samp>omit</samp>’</dt>
<dd><p>Do not use extension modules.
</p>
</dd>
</dl>
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<p>
Next: <a href="texi2any-Printed-Output.html#texi2any-Printed-Output" accesskey="n" rel="next"><code>texi2any</code> Printed Output</a>, Previous: <a href="Invoking-texi2any.html#Invoking-texi2any" accesskey="p" rel="prev">Invoking <code>texi2any</code></a>, Up: <a href="Generic-Translator-texi2any.html#Generic-Translator-texi2any" accesskey="u" rel="up">Generic Translator <code>texi2any</code></a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html#Command-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
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