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| <h4 class="subsection">2.1.3 What <span class="sc">gdb</span> Does During Startup</h4> |
| |
| <p><a name="index-g_t_0040value_007bGDBN_007d-startup-57"></a> |
| Here's the description of what <span class="sc">gdb</span> does during session startup: |
| |
| <ol type=1 start=1> |
| <li>Sets up the command interpreter as specified by the command line |
| (see <a href="Mode-Options.html#Mode-Options">interpreter</a>). |
| |
| <li><a name="index-init-file-58"></a>Reads the system-wide <dfn>init file</dfn> (if <samp><span class="option">--with-system-gdbinit</span></samp> was |
| used when building <span class="sc">gdb</span>; see <a href="System_002dwide-configuration.html#System_002dwide-configuration">System-wide configuration and settings</a>) and executes all the commands in |
| that file. |
| |
| <p><a name="Home-Directory-Init-File"></a><li>Reads the init file (if any) in your home directory<a rel="footnote" href="#fn-1" name="fnd-1"><sup>1</sup></a> and executes all the commands in |
| that file. |
| |
| <p><a name="Option-_002dinit_002deval_002dcommand"></a><li>Executes commands and command files specified by the ‘<samp><span class="samp">-iex</span></samp>’ and |
| ‘<samp><span class="samp">-ix</span></samp>’ options in their specified order. Usually you should use the |
| ‘<samp><span class="samp">-ex</span></samp>’ and ‘<samp><span class="samp">-x</span></samp>’ options instead, but this way you can apply |
| settings before <span class="sc">gdb</span> init files get executed and before inferior |
| gets loaded. |
| |
| <li>Processes command line options and operands. |
| |
| <p><a name="Init-File-in-the-Current-Directory-during-Startup"></a><li>Reads and executes the commands from init file (if any) in the current |
| working directory as long as ‘<samp><span class="samp">set auto-load local-gdbinit</span></samp>’ is set to |
| ‘<samp><span class="samp">on</span></samp>’ (see <a href="Init-File-in-the-Current-Directory.html#Init-File-in-the-Current-Directory">Init File in the Current Directory</a>). |
| This is only done if the current directory is |
| different from your home directory. Thus, you can have more than one |
| init file, one generic in your home directory, and another, specific |
| to the program you are debugging, in the directory where you invoke |
| <span class="sc">gdb</span>. |
| |
| <li>If the command line specified a program to debug, or a process to |
| attach to, or a core file, <span class="sc">gdb</span> loads any auto-loaded |
| scripts provided for the program or for its loaded shared libraries. |
| See <a href="Auto_002dloading.html#Auto_002dloading">Auto-loading</a>. |
| |
| <p>If you wish to disable the auto-loading during startup, |
| you must do something like the following: |
| |
| <pre class="smallexample"> $ gdb -iex "set auto-load python-scripts off" myprogram |
| </pre> |
| <p>Option ‘<samp><span class="samp">-ex</span></samp>’ does not work because the auto-loading is then turned |
| off too late. |
| |
| <li>Executes commands and command files specified by the ‘<samp><span class="samp">-ex</span></samp>’ and |
| ‘<samp><span class="samp">-x</span></samp>’ options in their specified order. See <a href="Command-Files.html#Command-Files">Command Files</a>, for |
| more details about <span class="sc">gdb</span> command files. |
| |
| <li>Reads the command history recorded in the <dfn>history file</dfn>. |
| See <a href="Command-History.html#Command-History">Command History</a>, for more details about the command history and the |
| files where <span class="sc">gdb</span> records it. |
| </ol> |
| |
| <p>Init files use the same syntax as <dfn>command files</dfn> (see <a href="Command-Files.html#Command-Files">Command Files</a>) and are processed by <span class="sc">gdb</span> in the same way. The init |
| file in your home directory can set options (such as ‘<samp><span class="samp">set |
| complaints</span></samp>’) that affect subsequent processing of command line options |
| and operands. Init files are not executed if you use the ‘<samp><span class="samp">-nx</span></samp>’ |
| option (see <a href="Mode-Options.html#Mode-Options">Choosing Modes</a>). |
| |
| <p>To display the list of init files loaded by gdb at startup, you |
| can use <kbd>gdb --help</kbd>. |
| |
| <p><a name="index-init-file-name-59"></a><a name="index-g_t_0040file_007b_002egdbinit_007d-60"></a><a name="index-g_t_0040file_007bgdb_002eini_007d-61"></a>The <span class="sc">gdb</span> init files are normally called <samp><span class="file">.gdbinit</span></samp>. |
| The DJGPP port of <span class="sc">gdb</span> uses the name <samp><span class="file">gdb.ini</span></samp>, due to |
| the limitations of file names imposed by DOS filesystems. The Windows |
| port of <span class="sc">gdb</span> uses the standard name, but if it finds a |
| <samp><span class="file">gdb.ini</span></samp> file in your home directory, it warns you about that |
| and suggests to rename the file to the standard name. |
| |
| <div class="footnote"> |
| <hr> |
| <h4>Footnotes</h4><p class="footnote"><small>[<a name="fn-1" href="#fnd-1">1</a>]</small> On |
| DOS/Windows systems, the home directory is the one pointed to by the |
| <code>HOME</code> environment variable.</p> |
| |
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