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<a name="objfile_002dgdbdotext-file"></a>
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<p>
Next: <a href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section" accesskey="n" rel="next">dotdebug_gdb_scripts section</a>, Up: <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions" accesskey="u" rel="up">Auto-loading extensions</a> &nbsp; [<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>
<a name="The-objfile_002dgdb_002eext-file"></a>
<h4 class="subsection">23.4.1 The <samp><var>objfile</var>-gdb.<var>ext</var></samp> file</h4>
<a name="index-objfile_002dgdb_002egdb"></a>
<a name="index-objfile_002dgdb_002epy"></a>
<a name="index-objfile_002dgdb_002escm"></a>

<p>When a new object file is read, <small>GDB</small> looks for a file named
<samp><var>objfile</var>-gdb.<var>ext</var></samp> (we call it <var>script-name</var> below),
where <var>objfile</var> is the object file&rsquo;s name and
where <var>ext</var> is the file extension for the extension language:
</p>
<dl compact="compact">
<dt><code><samp><var>objfile</var>-gdb.gdb</samp></code></dt>
<dd><p>GDB&rsquo;s own command language
</p></dd>
<dt><code><samp><var>objfile</var>-gdb.py</samp></code></dt>
<dd><p>Python
</p></dd>
<dt><code><samp><var>objfile</var>-gdb.scm</samp></code></dt>
<dd><p>Guile
</p></dd>
</dl>

<p><var>script-name</var> is formed by ensuring that the file name of <var>objfile</var>
is absolute, following all symlinks, and resolving <code>.</code> and <code>..</code>
components, and appending the <samp>-gdb.<var>ext</var></samp> suffix.
If this file exists and is readable, <small>GDB</small> will evaluate it as a
script in the specified extension language.
</p>
<p>If this file does not exist, then <small>GDB</small> will look for
<var>script-name</var> file in all of the directories as specified below.
(On MS-Windows/MS-DOS, the drive letter of the executable&rsquo;s leading
directories is converted to a one-letter subdirectory, i.e.
<samp>d:/usr/bin/</samp> is converted to <samp>/d/usr/bin/</samp>, because Windows
filesystems disallow colons in file names.)
</p>
<p>Note that loading of these files requires an accordingly configured
<code>auto-load safe-path</code> (see <a href="Auto_002dloading-safe-path.html#Auto_002dloading-safe-path">Auto-loading safe path</a>).
</p>
<p>For object files using <samp>.exe</samp> suffix <small>GDB</small> tries to load first the
scripts normally according to its <samp>.exe</samp> filename.  But if no scripts are
found <small>GDB</small> also tries script filenames matching the object file without
its <samp>.exe</samp> suffix.  This <samp>.exe</samp> stripping is case insensitive and it
is attempted on any platform.  This makes the script filenames compatible
between Unix and MS-Windows hosts.
</p>
<dl compact="compact">
<dd><a name="set-auto_002dload-scripts_002ddirectory"></a><a name="index-set-auto_002dload-scripts_002ddirectory"></a>
</dd>
<dt><code>set auto-load scripts-directory <span class="roman">[</span><var>directories</var><span class="roman">]</span></code></dt>
<dd><p>Control <small>GDB</small> auto-loaded scripts location.  Multiple directory entries
may be delimited by the host platform path separator in use
(&lsquo;<samp>:</samp>&rsquo; on Unix, &lsquo;<samp>;</samp>&rsquo; on MS-Windows and MS-DOS).
</p>
<p>Each entry here needs to be covered also by the security setting
<code>set auto-load safe-path</code> (see <a href="Auto_002dloading-safe-path.html#set-auto_002dload-safe_002dpath">set auto-load safe-path</a>).
</p>
<a name="with_002dauto_002dload_002ddir"></a><p>This variable defaults to <samp>$debugdir:$datadir/auto-load</samp>.  The default
<code>set auto-load safe-path</code> value can be also overriden by <small>GDB</small>
configuration option <samp>--with-auto-load-dir</samp>.
</p>
<p>Any reference to <samp>$debugdir</samp> will get replaced by
<var>debug-file-directory</var> value (see <a href="Separate-Debug-Files.html#Separate-Debug-Files">Separate Debug Files</a>) and any
reference to <samp>$datadir</samp> will get replaced by <var>data-directory</var> which is
determined at <small>GDB</small> startup (see <a href="Data-Files.html#Data-Files">Data Files</a>).  <samp>$debugdir</samp> and
<samp>$datadir</samp> must be placed as a directory component &mdash; either alone or
delimited by <samp>/</samp> or <samp>\</samp> directory separators, depending on the host
platform.
</p>
<p>The list of directories uses path separator (&lsquo;<samp>:</samp>&rsquo; on GNU and Unix
systems, &lsquo;<samp>;</samp>&rsquo; on MS-Windows and MS-DOS) to separate directories, similarly
to the <code>PATH</code> environment variable.
</p>
<a name="show-auto_002dload-scripts_002ddirectory"></a><a name="index-show-auto_002dload-scripts_002ddirectory"></a>
</dd>
<dt><code>show auto-load scripts-directory</code></dt>
<dd><p>Show <small>GDB</small> auto-loaded scripts location.
</p>
<a name="add_002dauto_002dload_002dscripts_002ddirectory"></a><a name="index-add_002dauto_002dload_002dscripts_002ddirectory"></a>
</dd>
<dt><code>add-auto-load-scripts-directory <span class="roman">[</span><var>directories</var>&hellip;<span class="roman">]</span></code></dt>
<dd><p>Add an entry (or list of entries) to the list of auto-loaded scripts locations.
Multiple entries may be delimited by the host platform path separator in use.
</p></dd>
</dl>

<p><small>GDB</small> does not track which files it has already auto-loaded this way.
<small>GDB</small> will load the associated script every time the corresponding
<var>objfile</var> is opened.
So your <samp>-gdb.<var>ext</var></samp> file should be careful to avoid errors if it
is evaluated more than once.
</p>
<hr>
<div class="header">
<p>
Next: <a href="dotdebug_005fgdb_005fscripts-section.html#dotdebug_005fgdb_005fscripts-section" accesskey="n" rel="next">dotdebug_gdb_scripts section</a>, Up: <a href="Auto_002dloading-extensions.html#Auto_002dloading-extensions" accesskey="u" rel="up">Auto-loading extensions</a> &nbsp; [<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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