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<a name="Extending-GDB"></a>
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<p>
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Next: <a href="Interpreters.html#Interpreters" accesskey="n" rel="next">Interpreters</a>, Previous: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="p" rel="previous">Controlling GDB</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
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<a name="Extending-GDB-1"></a>
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<h2 class="chapter">23 Extending <small>GDB</small></h2>
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<a name="index-extending-GDB"></a>
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<p><small>GDB</small> provides several mechanisms for extension.
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<small>GDB</small> also provides the ability to automatically load
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extensions when it reads a file for debugging. This allows the
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user to automatically customize <small>GDB</small> for the program
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being debugged.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="Sequences.html#Sequences" accesskey="1">Sequences</a>:</td><td> </td><td align="left" valign="top">Canned Sequences of <small>GDB</small> Commands
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Python.html#Python" accesskey="2">Python</a>:</td><td> </td><td align="left" valign="top">Extending <small>GDB</small> using Python
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Guile.html#Guile" accesskey="3">Guile</a>:</td><td> </td><td align="left" valign="top">Extending <small>GDB</small> using Guile
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions" accesskey="4">Auto-loading extensions</a>:</td><td> </td><td align="left" valign="top">Automatically loading extensions
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Multiple-Extension-Languages.html#Multiple-Extension-Languages" accesskey="5">Multiple Extension Languages</a>:</td><td> </td><td align="left" valign="top">Working with multiple extension languages
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Aliases.html#Aliases" accesskey="6">Aliases</a>:</td><td> </td><td align="left" valign="top">Creating new spellings of existing commands
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</td></tr>
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</table>
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<p>To facilitate the use of extension languages, <small>GDB</small> is capable
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of evaluating the contents of a file. When doing so, <small>GDB</small>
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can recognize which extension language is being used by looking at
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the filename extension. Files with an unrecognized filename extension
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are always treated as a <small>GDB</small> Command Files.
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See <a href="Command-Files.html#Command-Files">Command files</a>.
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</p>
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<p>You can control how <small>GDB</small> evaluates these files with the following
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setting:
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</p>
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<dl compact="compact">
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<dd><a name="index-set-script_002dextension"></a>
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<a name="index-show-script_002dextension"></a>
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</dd>
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<dt><code>set script-extension off</code></dt>
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<dd><p>All scripts are always evaluated as <small>GDB</small> Command Files.
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</p>
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</dd>
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<dt><code>set script-extension soft</code></dt>
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<dd><p>The debugger determines the scripting language based on filename
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extension. If this scripting language is supported, <small>GDB</small>
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evaluates the script using that language. Otherwise, it evaluates
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the file as a <small>GDB</small> Command File.
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</p>
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</dd>
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<dt><code>set script-extension strict</code></dt>
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<dd><p>The debugger determines the scripting language based on filename
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extension, and evaluates the script using that language. If the
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language is not supported, then the evaluation fails.
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</p>
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</dd>
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<dt><code>show script-extension</code></dt>
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<dd><p>Display the current value of the <code>script-extension</code> option.
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</p>
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</dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Interpreters.html#Interpreters" accesskey="n" rel="next">Interpreters</a>, Previous: <a href="Controlling-GDB.html#Controlling-GDB" accesskey="p" rel="previous">Controlling GDB</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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