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<a name="System-wide-configuration"></a>
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<p>
Previous:&nbsp;<a rel="previous" accesskey="p" href="Configure-Options.html#Configure-Options">Configure Options</a>,
Up:&nbsp;<a rel="up" accesskey="u" href="Installing-GDB.html#Installing-GDB">Installing GDB</a>
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<h3 class="section">C.6 System-wide configuration and settings</h3>
<p><a name="index-system_002dwide-init-file-3303"></a>
<span class="sc">gdb</span> can be configured to have a system-wide init file;
this file will be read and executed at startup (see <a href="Startup.html#Startup">What <span class="sc">gdb</span> does during startup</a>).
<p>Here is the corresponding configure option:
<dl>
<dt><code>--with-system-gdbinit=</code><var>file</var><dd>Specify that the default location of the system-wide init file is
<var>file</var>.
</dl>
<p>If <span class="sc">gdb</span> has been configured with the option <samp><span class="option">--prefix=$prefix</span></samp>,
it may be subject to relocation. Two possible cases:
<ul>
<li>If the default location of this init file contains <samp><span class="file">$prefix</span></samp>,
it will be subject to relocation. Suppose that the configure options
are <samp><span class="option">--prefix=$prefix --with-system-gdbinit=$prefix/etc/gdbinit</span></samp>;
if <span class="sc">gdb</span> is moved from <samp><span class="file">$prefix</span></samp> to <samp><span class="file">$install</span></samp>, the system
init file is looked for as <samp><span class="file">$install/etc/gdbinit</span></samp> instead of
<samp><span class="file">$prefix/etc/gdbinit</span></samp>.
<li>By contrast, if the default location does not contain the prefix,
it will not be relocated. E.g. if <span class="sc">gdb</span> has been configured with
<samp><span class="option">--prefix=/usr/local --with-system-gdbinit=/usr/share/gdb/gdbinit</span></samp>,
then <span class="sc">gdb</span> will always look for <samp><span class="file">/usr/share/gdb/gdbinit</span></samp>,
wherever <span class="sc">gdb</span> is installed.
</ul>
<p>If the configured location of the system-wide init file (as given by the
<samp><span class="option">--with-system-gdbinit</span></samp> option at configure time) is in the
data-directory (as specified by <samp><span class="option">--with-gdb-datadir</span></samp> at configure
time) or in one of its subdirectories, then <span class="sc">gdb</span> will look for the
system-wide init file in the directory specified by the
<samp><span class="option">--data-directory</span></samp> command-line option.
Note that the system-wide init file is only read once, during <span class="sc">gdb</span>
initialization. If the data-directory is changed after <span class="sc">gdb</span> has
started with the <code>set data-directory</code> command, the file will not be
reread.
<ul class="menu">
<li><a accesskey="1" href="System_002dwide-Configuration-Scripts.html#System_002dwide-Configuration-Scripts">System-wide Configuration Scripts</a>: Installed System-wide Configuration Scripts
</ul>
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