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toolchain-gcc-arm-embedded

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<a name="Control-Warnings_003a-_002dW_002c-_002d_002dwarn_002c-_002d_002dno_002dwarn_002c-_002d_002dfatal_002dwarnings"></a>
<h3 class="section">2.17 Control Warnings: <samp>-W</samp>, <samp>--warn</samp>, <samp>--no-warn</samp>, <samp>--fatal-warnings</samp></h3>

<p><code>as</code> should never give a warning or error message when
assembling compiler output.  But programs written by people often
cause <code>as</code> to give a warning that a particular assumption was
made.  All such warnings are directed to the standard error file.
</p>
<a name="index-_002dW"></a>
<a name="index-_002d_002dno_002dwarn"></a>
<a name="index-suppressing-warnings"></a>
<a name="index-warnings_002c-suppressing"></a>
<p>If you use the <samp>-W</samp> and <samp>--no-warn</samp> options, no warnings are issued.
This only affects the warning messages: it does not change any particular of
how <code>as</code> assembles your file.  Errors, which stop the assembly,
are still reported.
</p>
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<a name="index-errors_002c-caused-by-warnings"></a>
<a name="index-warnings_002c-causing-error"></a>
<p>If you use the <samp>--fatal-warnings</samp> option, <code>as</code> considers
files that generate warnings to be in error.
</p>
<a name="index-_002d_002dwarn"></a>
<a name="index-warnings_002c-switching-on"></a>
<p>You can switch these options off again by specifying <samp>--warn</samp>, which
causes warnings to be output as usual.
</p>


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