1<html lang="en"> 2<head> 3<title>VMS Options - Using the GNU Compiler Collection (GCC)</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Using the GNU Compiler Collection (GCC)"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Submodel-Options.html#Submodel-Options" title="Submodel Options"> 9<link rel="prev" href="VAX-Options.html#VAX-Options" title="VAX Options"> 10<link rel="next" href="VxWorks-Options.html#VxWorks-Options" title="VxWorks Options"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988-2013 Free Software Foundation, Inc. 14 15Permission is granted to copy, distribute and/or modify this document 16under the terms of the GNU Free Documentation License, Version 1.3 or 17any later version published by the Free Software Foundation; with the 18Invariant Sections being ``Funding Free Software'', the Front-Cover 19Texts being (a) (see below), and with the Back-Cover Texts being (b) 20(see below). A copy of the license is included in the section entitled 21``GNU Free Documentation License''. 22 23(a) The FSF's Front-Cover Text is: 24 25 A GNU Manual 26 27(b) The FSF's Back-Cover Text is: 28 29 You have freedom to copy and modify this GNU Manual, like GNU 30 software. Copies published by the Free Software Foundation raise 31 funds for GNU development.--> 32<meta http-equiv="Content-Style-Type" content="text/css"> 33<style type="text/css"><!-- 34 pre.display { font-family:inherit } 35 pre.format { font-family:inherit } 36 pre.smalldisplay { font-family:inherit; font-size:smaller } 37 pre.smallformat { font-family:inherit; font-size:smaller } 38 pre.smallexample { font-size:smaller } 39 pre.smalllisp { font-size:smaller } 40 span.sc { font-variant:small-caps } 41 span.roman { font-family:serif; font-weight:normal; } 42 span.sansserif { font-family:sans-serif; font-weight:normal; } 43--></style> 44<link rel="stylesheet" type="text/css" href="../cs.css"> 45</head> 46<body> 47<div class="node"> 48<a name="VMS-Options"></a> 49<p> 50Next: <a rel="next" accesskey="n" href="VxWorks-Options.html#VxWorks-Options">VxWorks Options</a>, 51Previous: <a rel="previous" accesskey="p" href="VAX-Options.html#VAX-Options">VAX Options</a>, 52Up: <a rel="up" accesskey="u" href="Submodel-Options.html#Submodel-Options">Submodel Options</a> 53<hr> 54</div> 55 56<h4 class="subsection">3.17.47 VMS Options</h4> 57 58<p>These ‘<samp><span class="samp">-m</span></samp>’ options are defined for the VMS implementations: 59 60 <dl> 61<dt><code>-mvms-return-codes</code><dd><a name="index-mvms_002dreturn_002dcodes-2310"></a>Return VMS condition codes from <code>main</code>. The default is to return POSIX-style 62condition (e.g. error) codes. 63 64 <br><dt><code>-mdebug-main=</code><var>prefix</var><dd><a name="index-mdebug_002dmain_003d_0040var_007bprefix_007d-2311"></a>Flag the first routine whose name starts with <var>prefix</var> as the main 65routine for the debugger. 66 67 <br><dt><code>-mmalloc64</code><dd><a name="index-mmalloc64-2312"></a>Default to 64-bit memory allocation routines. 68 69 <br><dt><code>-mpointer-size=</code><var>size</var><dd><a name="index-g_t_002dmpointer_002dsize_003d_0040var_007bsize_007d-2313"></a>Set the default size of pointers. Possible options for <var>size</var> are 70‘<samp><span class="samp">32</span></samp>’ or ‘<samp><span class="samp">short</span></samp>’ for 32 bit pointers, ‘<samp><span class="samp">64</span></samp>’ or ‘<samp><span class="samp">long</span></samp>’ 71for 64 bit pointers, and ‘<samp><span class="samp">no</span></samp>’ for supporting only 32 bit pointers. 72The later option disables <code>pragma pointer_size</code>. 73</dl> 74 75 </body></html> 76 77