toolchain/gcc-linaro-6.3.1-2017.02-x8.../share/doc/as.html/o.html

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<a name="Name-the-Object-File_003a-_002do"></a>
<h3 class="section">2.12 Name the Object File: <samp>-o</samp></h3>
<a name="index-_002do"></a>
<a name="index-naming-object-file"></a>
<a name="index-object-file-name"></a>
<p>There is always one object file output when you run <code>as</code>. By
default it has the name
<samp>a.out</samp> (or <samp>b.out</samp>, for Intel 960 targets only).
You use this option (which takes exactly one filename) to give the
object file a different name.
</p>
<p>Whatever the object file is called, <code>as</code> overwrites any
existing file of the same name.
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