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<a name="VMS-Options-1"></a>
<h4 class="subsection">3.19.57 VMS Options</h4>

<p>These &lsquo;<samp>-m</samp>&rsquo; options are defined for the VMS implementations:
</p>
<dl compact="compact">
<dt><code>-mvms-return-codes</code></dt>
<dd><a name="index-mvms_002dreturn_002dcodes"></a>
<p>Return VMS condition codes from <code>main</code>. The default is to return POSIX-style
condition (e.g. error) codes.
</p>
</dd>
<dt><code>-mdebug-main=<var>prefix</var></code></dt>
<dd><a name="index-mdebug_002dmain_003dprefix"></a>
<p>Flag the first routine whose name starts with <var>prefix</var> as the main
routine for the debugger.
</p>
</dd>
<dt><code>-mmalloc64</code></dt>
<dd><a name="index-mmalloc64"></a>
<p>Default to 64-bit memory allocation routines.
</p>
</dd>
<dt><code>-mpointer-size=<var>size</var></code></dt>
<dd><a name="index-mpointer_002dsize_003dsize"></a>
<p>Set the default size of pointers. Possible options for <var>size</var> are
&lsquo;<samp>32</samp>&rsquo; or &lsquo;<samp>short</samp>&rsquo; for 32 bit pointers, &lsquo;<samp>64</samp>&rsquo; or &lsquo;<samp>long</samp>&rsquo;
for 64 bit pointers, and &lsquo;<samp>no</samp>&rsquo; for supporting only 32 bit pointers.
The later option disables <code>pragma pointer_size</code>.
</p></dd>
</dl>


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