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| <h3 class="section">1.7 Error and Warning Messages</h3> |
| |
| <!-- man begin DESCRIPTION --> |
| <p><a name="index-error-messages-40"></a><a name="index-warning-messages-41"></a><a name="index-messages-from-assembler-42"></a><samp><span class="command">as</span></samp> may write warnings and error messages to the standard error |
| file (usually your terminal). This should not happen when a compiler |
| runs <samp><span class="command">as</span></samp> automatically. Warnings report an assumption made so |
| that <samp><span class="command">as</span></samp> could keep assembling a flawed program; errors report a |
| grave problem that stops the assembly. |
| |
| <!-- man end --> |
| <p><a name="index-format-of-warning-messages-43"></a>Warning messages have the format |
| |
| <pre class="smallexample"> file_name:<b>NNN</b>:Warning Message Text |
| </pre> |
| <p class="noindent"><a name="index-line-numbers_002c-in-warnings_002ferrors-44"></a>(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-45"></a>Error messages have the format |
| <pre class="smallexample"> file_name:<b>NNN</b>:FATAL:Error Message Text |
| </pre> |
| <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. |
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