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<title>Debugging with GDB: System-wide configuration</title>
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<a name="System_002dwide-configuration"></a>
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<p>
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Previous: <a href="Configure-Options.html#Configure-Options" accesskey="p" rel="previous">Configure Options</a>, Up: <a href="Installing-GDB.html#Installing-GDB" accesskey="u" rel="up">Installing GDB</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="System_002dWide-Configuration-and-Settings"></a>
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<h3 class="section">C.6 System-Wide Configuration and Settings</h3>
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<a name="index-system_002dwide-init-file"></a>
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<p><small>GDB</small> can be configured to have a system-wide init file and a
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system-wide init file directory; this file and files in that directory
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(if they have a recognized file extension) will be read and executed at
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startup (see <a href="Startup.html#Startup">What <small>GDB</small> does during startup</a>).
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</p>
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<p>Here are the corresponding configure options:
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</p>
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<dl compact="compact">
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<dt><code>--with-system-gdbinit=<var>file</var></code></dt>
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<dd><p>Specify that the default location of the system-wide init file is
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<var>file</var>.
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</p></dd>
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<dt><code>--with-system-gdbinit-dir=<var>directory</var></code></dt>
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<dd><p>Specify that the default location of the system-wide init file directory
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is <var>directory</var>.
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</p></dd>
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</dl>
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<p>If <small>GDB</small> has been configured with the option <samp>--prefix=$prefix</samp>,
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they may be subject to relocation. Two possible cases:
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</p>
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<ul>
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<li> If the default location of this init file/directory contains <samp>$prefix</samp>,
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it will be subject to relocation. Suppose that the configure options
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are <samp>--prefix=$prefix --with-system-gdbinit=$prefix/etc/gdbinit</samp>;
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if <small>GDB</small> is moved from <samp>$prefix</samp> to <samp>$install</samp>, the system
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init file is looked for as <samp>$install/etc/gdbinit</samp> instead of
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<samp>$prefix/etc/gdbinit</samp>.
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</li><li> By contrast, if the default location does not contain the prefix,
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it will not be relocated. E.g. if <small>GDB</small> has been configured with
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<samp>--prefix=/usr/local --with-system-gdbinit=/usr/share/gdb/gdbinit</samp>,
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then <small>GDB</small> will always look for <samp>/usr/share/gdb/gdbinit</samp>,
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wherever <small>GDB</small> is installed.
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</li></ul>
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<p>If the configured location of the system-wide init file (as given by the
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<samp>--with-system-gdbinit</samp> option at configure time) is in the
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data-directory (as specified by <samp>--with-gdb-datadir</samp> at configure
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time) or in one of its subdirectories, then <small>GDB</small> will look for the
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system-wide init file in the directory specified by the
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<samp>--data-directory</samp> command-line option.
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Note that the system-wide init file is only read once, during <small>GDB</small>
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initialization. If the data-directory is changed after <small>GDB</small> has
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started with the <code>set data-directory</code> command, the file will not be
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reread.
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</p>
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<p>This applies similarly to the system-wide directory specified in
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<samp>--with-system-gdbinit-dir</samp>.
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</p>
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<p>Any supported scripting language can be used for these init files, as long
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as the file extension matches the scripting language. To be interpreted
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as regular <small>GDB</small> commands, the files needs to have a <samp>.gdb</samp>
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extension.
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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="System_002dwide-Configuration-Scripts.html#System_002dwide-Configuration-Scripts" accesskey="1">System-wide Configuration Scripts</a>:</td><td> </td><td align="left" valign="top">Installed System-wide Configuration Scripts
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</td></tr>
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</table>
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Previous: <a href="Configure-Options.html#Configure-Options" accesskey="p" rel="previous">Configure Options</a>, Up: <a href="Installing-GDB.html#Installing-GDB" accesskey="u" rel="up">Installing GDB</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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