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| <h3 class="section">22.9 Optional Warnings and Messages</h3> |
| |
| <p><a name="index-verbose-operation-1730"></a><a name="index-optional-warnings-1731"></a>By default, <span class="sc">gdb</span> is silent about its inner workings. If you are |
| running on a slow machine, you may want to use the <code>set verbose</code> |
| command. This makes <span class="sc">gdb</span> tell you when it does a lengthy |
| internal operation, so you will not think it has crashed. |
| |
| <p>Currently, the messages controlled by <code>set verbose</code> are those |
| which announce that the symbol table for a source file is being read; |
| see <code>symbol-file</code> in <a href="Files.html#Files">Commands to Specify Files</a>. |
| |
| |
| <a name="index-set-verbose-1732"></a> |
| <dl><dt><code>set verbose on</code><dd>Enables <span class="sc">gdb</span> output of certain informational messages. |
| |
| <br><dt><code>set verbose off</code><dd>Disables <span class="sc">gdb</span> output of certain informational messages. |
| |
| <p><a name="index-show-verbose-1733"></a><br><dt><code>show verbose</code><dd>Displays whether <code>set verbose</code> is on or off. |
| </dl> |
| |
| <p>By default, if <span class="sc">gdb</span> encounters bugs in the symbol table of an |
| object file, it is silent; but if you are debugging a compiler, you may |
| find this information useful (see <a href="Symbol-Errors.html#Symbol-Errors">Errors Reading Symbol Files</a>). |
| |
| |
| <a name="index-set-complaints-1734"></a> |
| <dl><dt><code>set complaints </code><var>limit</var><dd>Permits <span class="sc">gdb</span> to output <var>limit</var> complaints about each type of |
| unusual symbols before becoming silent about the problem. Set |
| <var>limit</var> to zero to suppress all complaints; set it to a large number |
| to prevent complaints from being suppressed. |
| |
| <p><a name="index-show-complaints-1735"></a><br><dt><code>show complaints</code><dd>Displays how many symbol complaints <span class="sc">gdb</span> is permitted to produce. |
| |
| </dl> |
| |
| <p><a name="confirmation-requests"></a>By default, <span class="sc">gdb</span> is cautious, and asks what sometimes seems to be a |
| lot of stupid questions to confirm certain commands. For example, if |
| you try to run a program which is already running: |
| |
| <pre class="smallexample"> (gdb) run |
| The program being debugged has been started already. |
| Start it from the beginning? (y or n) |
| </pre> |
| <p>If you are willing to unflinchingly face the consequences of your own |
| commands, you can disable this “feature”: |
| |
| |
| <a name="index-set-confirm-1736"></a> |
| <a name="index-flinching-1737"></a> |
| <a name="index-confirmation-1738"></a> |
| <a name="index-stupid-questions-1739"></a> |
| <dl><dt><code>set confirm off</code><dd>Disables confirmation requests. Note that running <span class="sc">gdb</span> with |
| the <samp><span class="option">--batch</span></samp> option (see <a href="Mode-Options.html#Mode-Options">-batch</a>) also |
| automatically disables confirmation requests. |
| |
| <br><dt><code>set confirm on</code><dd>Enables confirmation requests (the default). |
| |
| <p><a name="index-show-confirm-1740"></a><br><dt><code>show confirm</code><dd>Displays state of confirmation requests. |
| |
| </dl> |
| |
| <p><a name="index-command-tracing-1741"></a>If you need to debug user-defined commands or sourced files you may find it |
| useful to enable <dfn>command tracing</dfn>. In this mode each command will be |
| printed as it is executed, prefixed with one or more ‘<samp><span class="samp">+</span></samp>’ symbols, the |
| quantity denoting the call depth of each command. |
| |
| |
| <a name="index-set-trace_002dcommands-1742"></a> |
| <a name="index-command-scripts_002c-debugging-1743"></a> |
| <dl><dt><code>set trace-commands on</code><dd>Enable command tracing. |
| <br><dt><code>set trace-commands off</code><dd>Disable command tracing. |
| <br><dt><code>show trace-commands</code><dd>Display the current state of command tracing. |
| </dl> |
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