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| <title>Using the GNU Compiler Collection (GCC): VMS Options</title> |
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| <h4 class="subsection">3.17.51 VMS Options</h4> |
| |
| <p>These ‘<samp>-m</samp>’ 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-_002dmpointer_002dsize_003dsize"></a> |
| <p>Set the default size of pointers. Possible options for <var>size</var> are |
| ‘<samp>32</samp>’ or ‘<samp>short</samp>’ for 32 bit pointers, ‘<samp>64</samp>’ or ‘<samp>long</samp>’ |
| for 64 bit pointers, and ‘<samp>no</samp>’ for supporting only 32 bit pointers. |
| The later option disables <code>pragma pointer_size</code>. |
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