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| <title>Using as: Errors</title> |
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| <a name="Errors"></a> |
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| Previous: <a href="Object.html#Object" accesskey="p" rel="prev">Object</a>, Up: <a href="Overview.html#Overview" accesskey="u" rel="up">Overview</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Error-and-Warning-Messages"></a> |
| <h3 class="section">1.7 Error and Warning Messages</h3> |
| |
| |
| <a name="index-error-messages"></a> |
| <a name="index-warning-messages"></a> |
| <a name="index-messages-from-assembler"></a> |
| <p><code>as</code> may write warnings and error messages to the standard error |
| file (usually your terminal). This should not happen when a compiler |
| runs <code>as</code> automatically. Warnings report an assumption made so |
| that <code>as</code> could keep assembling a flawed program; errors report a |
| grave problem that stops the assembly. |
| </p> |
| |
| <a name="index-format-of-warning-messages"></a> |
| <p>Warning messages have the format |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">file_name:<b>NNN</b>:Warning Message Text |
| </pre></div> |
| |
| <a name="index-line-numbers_002c-in-warnings_002ferrors"></a> |
| <p>(where <b>NNN</b> is a line number). If a logical file name has been given |
| (see <a href="File.html#File"><code>.file</code></a>) it is used for the filename, otherwise the name of |
| the current input file is used. If a logical line number was given |
| (see <a href="Line.html#Line"><code>.line</code></a>) |
| then it is used to calculate the number printed, |
| otherwise the actual line in the current source file is printed. The |
| message text is intended to be self explanatory (in the grand Unix |
| tradition). |
| </p> |
| <a name="index-format-of-error-messages"></a> |
| <p>Error messages have the format |
| </p><div class="smallexample"> |
| <pre class="smallexample">file_name:<b>NNN</b>:FATAL:Error Message Text |
| </pre></div> |
| <p>The file name and line number are derived as for warning |
| messages. The actual message text may be rather less explanatory |
| because many of them aren’t supposed to happen. |
| </p> |
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