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| <h3 class="section">B.2 Invoking the <span class="sc">gdb</span> <samp><span class="file">configure</span></samp> Script</h3> |
| |
| <p><a name="index-configuring-_0040value_007bGDBN_007d-2298"></a><span class="sc">gdb</span> comes with a <samp><span class="file">configure</span></samp> script that automates the process |
| of preparing <span class="sc">gdb</span> for installation; you can then use <code>make</code> to |
| build the <code>gdb</code> program. |
| |
| <p>The <span class="sc">gdb</span> distribution includes all the source code you need for |
| <span class="sc">gdb</span> in a single directory, whose name is usually composed by |
| appending the version number to ‘<samp><span class="samp">gdb</span></samp>’. |
| |
| <p>For example, the <span class="sc">gdb</span> version 7.2.50.20100908-cvs distribution is in the |
| <samp><span class="file">gdb-7.2.50.20100908-cvs</span></samp> directory. That directory contains: |
| |
| <dl> |
| <dt><code>gdb-7.2.50.20100908-cvs/configure </code><span class="roman">(and supporting files)</span><dd>script for configuring <span class="sc">gdb</span> and all its supporting libraries |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/gdb</code><dd>the source specific to <span class="sc">gdb</span> itself |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/bfd</code><dd>source for the Binary File Descriptor library |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/include</code><dd><span class="sc">gnu</span> include files |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/libiberty</code><dd>source for the ‘<samp><span class="samp">-liberty</span></samp>’ free software library |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/opcodes</code><dd>source for the library of opcode tables and disassemblers |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/readline</code><dd>source for the <span class="sc">gnu</span> command-line interface |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/glob</code><dd>source for the <span class="sc">gnu</span> filename pattern-matching subroutine |
| |
| <br><dt><code>gdb-7.2.50.20100908-cvs/mmalloc</code><dd>source for the <span class="sc">gnu</span> memory-mapped malloc package |
| </dl> |
| |
| <p>The simplest way to configure and build <span class="sc">gdb</span> is to run <samp><span class="file">configure</span></samp> |
| from the <samp><span class="file">gdb-</span><var>version-number</var></samp> source directory, which in |
| this example is the <samp><span class="file">gdb-7.2.50.20100908-cvs</span></samp> directory. |
| |
| <p>First switch to the <samp><span class="file">gdb-</span><var>version-number</var></samp> source directory |
| if you are not already in it; then run <samp><span class="file">configure</span></samp>. Pass the |
| identifier for the platform on which <span class="sc">gdb</span> will run as an |
| argument. |
| |
| <p>For example: |
| |
| <pre class="smallexample"> cd gdb-7.2.50.20100908-cvs |
| ./configure <var>host</var> |
| make |
| </pre> |
| <p class="noindent">where <var>host</var> is an identifier such as ‘<samp><span class="samp">sun4</span></samp>’ or |
| ‘<samp><span class="samp">decstation</span></samp>’, that identifies the platform where <span class="sc">gdb</span> will run. |
| (You can often leave off <var>host</var>; <samp><span class="file">configure</span></samp> tries to guess the |
| correct value by examining your system.) |
| |
| <p>Running ‘<samp><span class="samp">configure </span><var>host</var></samp>’ and then running <code>make</code> builds the |
| <samp><span class="file">bfd</span></samp>, <samp><span class="file">readline</span></samp>, <samp><span class="file">mmalloc</span></samp>, and <samp><span class="file">libiberty</span></samp> |
| libraries, then <code>gdb</code> itself. The configured source files, and the |
| binaries, are left in the corresponding source directories. |
| |
| <p><samp><span class="file">configure</span></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: |
| |
| <pre class="smallexample"> sh configure <var>host</var> |
| </pre> |
| <p>If you run <samp><span class="file">configure</span></samp> from a directory that contains source |
| directories for multiple libraries or programs, such as the |
| <samp><span class="file">gdb-7.2.50.20100908-cvs</span></samp> source directory for version 7.2.50.20100908-cvs, |
| <samp><span class="file">configure</span></samp> |
| creates configuration files for every directory level underneath (unless |
| you tell it not to, with the ‘<samp><span class="samp">--norecursion</span></samp>’ option). |
| |
| <p>You should run the <samp><span class="file">configure</span></samp> script from the top directory in the |
| source tree, the <samp><span class="file">gdb-</span><var>version-number</var></samp> directory. If you run |
| <samp><span class="file">configure</span></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><span class="file">configure</span></samp> from the <samp><span class="file">gdb</span></samp> subdirectory |
| of the <samp><span class="file">gdb-</span><var>version-number</var></samp> directory, you will omit the |
| configuration of <samp><span class="file">bfd</span></samp>, <samp><span class="file">readline</span></samp>, and other sibling |
| directories of the <samp><span class="file">gdb</span></samp> subdirectory. This leads to build errors |
| about missing include files such as <samp><span class="file">bfd/bfd.h</span></samp>. |
| |
| <p>You can install <code>gdb</code> anywhere; it has no hardwired paths. |
| However, you should make sure that the shell on your path (named by |
| the ‘<samp><span class="samp">SHELL</span></samp>’ environment variable) is publicly readable. Remember |
| that <span class="sc">gdb</span> uses the shell to start your program—some systems refuse to |
| let <span class="sc">gdb</span> debug child processes whose programs are not readable. |
| |
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