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<title>Running Configure (Debugging with GDB)</title>

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<a name="Running-Configure"></a>
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<p>
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<hr>
<a name="Invoking-the-GDB-configure-Script"></a>
<h3 class="section">C.2 Invoking the <small>GDB</small> <samp>configure</samp> Script</h3>
<a name="index-configuring-GDB"></a>
<p><small>GDB</small> comes with a <samp>configure</samp> script that automates the process
of preparing <small>GDB</small> for installation; you can then use <code>make</code> to
build the <code>gdb</code> program.
</p>
<p>The <small>GDB</small> distribution includes all the source code you need for
<small>GDB</small> in a single directory, whose name is usually composed by
appending the version number to &lsquo;<samp>gdb</samp>&rsquo;.
</p>
<p>For example, the <small>GDB</small> version 10.1.90.20201028-git distribution is in the
<samp>gdb-10.1.90.20201028-git</samp> directory.  That directory contains:
</p>
<dl compact="compact">
<dt><code>gdb-10.1.90.20201028-git/configure <span class="roman">(and supporting files)</span></code></dt>
<dd><p>script for configuring <small>GDB</small> and all its supporting libraries
</p>
</dd>
<dt><code>gdb-10.1.90.20201028-git/gdb</code></dt>
<dd><p>the source specific to <small>GDB</small> itself
</p>
</dd>
<dt><code>gdb-10.1.90.20201028-git/bfd</code></dt>
<dd><p>source for the Binary File Descriptor library
</p>
</dd>
<dt><code>gdb-10.1.90.20201028-git/include</code></dt>
<dd><p><small>GNU</small> include files
</p>
</dd>
<dt><code>gdb-10.1.90.20201028-git/libiberty</code></dt>
<dd><p>source for the &lsquo;<samp>-liberty</samp>&rsquo; free software library
</p>
</dd>
<dt><code>gdb-10.1.90.20201028-git/opcodes</code></dt>
<dd><p>source for the library of opcode tables and disassemblers
</p>
</dd>
<dt><code>gdb-10.1.90.20201028-git/readline</code></dt>
<dd><p>source for the <small>GNU</small> command-line interface
</p></dd>
</dl>

<p>There may be other subdirectories as well.
</p>
<p>The simplest way to configure and build <small>GDB</small> is to run <samp>configure</samp>
from the <samp>gdb-<var>version-number</var></samp> source directory, which in
this example is the <samp>gdb-10.1.90.20201028-git</samp> directory.
</p>
<p>First switch to the <samp>gdb-<var>version-number</var></samp> source directory
if you are not already in it; then run <samp>configure</samp>.  Pass the
identifier for the platform on which <small>GDB</small> will run as an
argument.
</p>
<p>For example:
</p>
<div class="smallexample">
<pre class="smallexample">cd gdb-10.1.90.20201028-git
./configure
make
</pre></div>

<p>Running &lsquo;<samp>configure</samp>&rsquo; and then running <code>make</code> builds the
included supporting libraries, then <code>gdb</code> itself.  The configured
source files, and the binaries, are left in the corresponding source
directories.
</p>
<p><samp>configure</samp> is a Bourne-shell (<code>/bin/sh</code>) script; if your
system does not recognize this automatically when you run a different
shell, you may need to run <code>sh</code> on it explicitly:
</p>
<div class="smallexample">
<pre class="smallexample">sh configure
</pre></div>

<p>You should run the <samp>configure</samp> script from the top directory in the
source tree, the <samp>gdb-<var>version-number</var></samp> directory.  If you run
<samp>configure</samp> from one of the subdirectories, you will configure only
that subdirectory.  That is usually not what you want.  In particular,
if you run the first <samp>configure</samp> from the <samp>gdb</samp> subdirectory
of the <samp>gdb-<var>version-number</var></samp> directory, you will omit the
configuration of <samp>bfd</samp>, <samp>readline</samp>, and other sibling
directories of the <samp>gdb</samp> subdirectory.  This leads to build errors
about missing include files such as <samp>bfd/bfd.h</samp>.
</p>
<p>You can install <code><small>GDB</small></code> anywhere.  The best way to do this
is to pass the <code>--prefix</code> option to <code>configure</code>, and then
install it with <code>make install</code>.
</p>
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