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<a name="System_002dwide-configuration"></a>
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<a name="System_002dwide-configuration-and-settings"></a>
<h3 class="section">C.6 System-wide configuration and settings</h3>
<a name="index-system_002dwide-init-file"></a>

<p><small>GDB</small> can be configured to have a system-wide init file and a
system-wide init file directory; this file and files in that directory
(if they have a recognized file extension) will be read and executed at
startup (see <a href="Startup.html#Startup">What <small>GDB</small> does during startup</a>).
</p>
<p>Here are the corresponding configure options:
</p>
<dl compact="compact">
<dt><code>--with-system-gdbinit=<var>file</var></code></dt>
<dd><p>Specify that the default location of the system-wide init file is
<var>file</var>.
</p></dd>
<dt><code>--with-system-gdbinit-dir=<var>directory</var></code></dt>
<dd><p>Specify that the default location of the system-wide init file directory
is <var>directory</var>.
</p></dd>
</dl>

<p>If <small>GDB</small> has been configured with the option <samp>--prefix=$prefix</samp>,
they may be subject to relocation.  Two possible cases:
</p>
<ul>
<li> If the default location of this init file/directory contains <samp>$prefix</samp>,
it will be subject to relocation.  Suppose that the configure options
are <samp>--prefix=$prefix --with-system-gdbinit=$prefix/etc/gdbinit</samp>;
if <small>GDB</small> is moved from <samp>$prefix</samp> to <samp>$install</samp>, the system
init file is looked for as <samp>$install/etc/gdbinit</samp> instead of
<samp>$prefix/etc/gdbinit</samp>.

</li><li> By contrast, if the default location does not contain the prefix,
it will not be relocated.  E.g. if <small>GDB</small> has been configured with
<samp>--prefix=/usr/local --with-system-gdbinit=/usr/share/gdb/gdbinit</samp>,
then <small>GDB</small> will always look for <samp>/usr/share/gdb/gdbinit</samp>,
wherever <small>GDB</small> is installed.
</li></ul>

<p>If the configured location of the system-wide init file (as given by the
<samp>--with-system-gdbinit</samp> option at configure time) is in the
data-directory (as specified by <samp>--with-gdb-datadir</samp> at configure
time) or in one of its subdirectories, then <small>GDB</small> will look for the
system-wide init file in the directory specified by the
<samp>--data-directory</samp> command-line option.
Note that the system-wide init file is only read once, during <small>GDB</small>
initialization.  If the data-directory is changed after <small>GDB</small> has
started with the <code>set data-directory</code> command, the file will not be
reread.
</p>
<p>This applies similarly to the system-wide directory specified in
<samp>--with-system-gdbinit-dir</samp>.
</p>
<p>Any supported scripting language can be used for these init files, as long
as the file extension matches the scripting language.  To be interpreted
as regular <small>GDB</small> commands, the files needs to have a <samp>.gdb</samp>
extension.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="System_002dwide-Configuration-Scripts.html#System_002dwide-Configuration-Scripts" accesskey="1">System-wide Configuration Scripts</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Installed System-wide Configuration Scripts
</td></tr>
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