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<html lang="en"><head><title>Using the GNU Compiler Collection (GCC)</title><meta http-equiv="Content-Type" content="text/html"><meta name="description" content="Using the GNU Compiler Collection (GCC)"><meta name="generator" content="makeinfo 4.6"><!--Copyright &copy; 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.   <p>Permission is granted to copy, distribute and/or modify this documentunder the terms of the GNU Free Documentation License, Version 1.2 orany later version published by the Free Software Foundation; with theInvariant Sections being "GNU General Public License" and "FundingFree Software", the Front-Cover texts being (a) (see below), and withthe Back-Cover Texts being (b) (see below).  A copy of the license isincluded in the section entitled "GNU Free Documentation License".   <p>(a) The FSF's Front-Cover Text is:   <p>A GNU Manual   <p>(b) The FSF's Back-Cover Text is:   <p>You have freedom to copy and modify this GNU Manual, like GNU     software.  Copies published by the Free Software Foundation raise     funds for GNU development.--><meta http-equiv="Content-Style-Type" content="text/css"><style type="text/css"><!--  pre.display { font-family:inherit }  pre.format  { font-family:inherit }  pre.smalldisplay { font-family:inherit; font-size:smaller }  pre.smallformat  { font-family:inherit; font-size:smaller }  pre.smallexample { font-size:smaller }  pre.smalllisp    { font-size:smaller }--></style></head><body><div class="node"><p>Node:&nbsp;<a name="M68hc1x%20Options">M68hc1x Options</a>,Next:&nbsp;<a rel="next" accesskey="n" href="VAX-Options.html#VAX%20Options">VAX Options</a>,Previous:&nbsp;<a rel="previous" accesskey="p" href="M680x0-Options.html#M680x0%20Options">M680x0 Options</a>,Up:&nbsp;<a rel="up" accesskey="u" href="Submodel-Options.html#Submodel%20Options">Submodel Options</a><hr><br></div><h3 class="subsection">M68hc1x Options</h4><p>These are the <code>-m</code> options defined for the 68hc11 and 68hc12microcontrollers.  The default values for these options depends onwhich style of microcontroller was selected when the compiler was configured;the defaults for the most common choices are given below.     <dl><dt><code>-m6811</code>     <dd><dt><code>-m68hc11</code>     <dd>Generate output for a 68HC11.  This is the defaultwhen the compiler is configured for 68HC11-based systems.     <br><dt><code>-m6812</code>     <dd><dt><code>-m68hc12</code>     <dd>Generate output for a 68HC12.  This is the defaultwhen the compiler is configured for 68HC12-based systems.     <br><dt><code>-m68S12</code>     <dd><dt><code>-m68hcs12</code>     <dd>Generate output for a 68HCS12.     <br><dt><code>-mauto-incdec</code>     <dd>Enable the use of 68HC12 pre and post auto-increment and auto-decrementaddressing modes.     <br><dt><code>-minmax</code>     <dd><dt><code>-nominmax</code>     <dd>Enable the use of 68HC12 min and max instructions.     <br><dt><code>-mlong-calls</code>     <dd><dt><code>-mno-long-calls</code>     <dd>Treat all calls as being far away (near).  If calls are assumed to befar away, the compiler will use the <code>call</code> instruction tocall a function and the <code>rtc</code> instruction for returning.     <br><dt><code>-mshort</code>     <dd>Consider type <code>int</code> to be 16 bits wide, like <code>short int</code>.     <br><dt><code>-msoft-reg-count=</code><var>count</var><code></code>     <dd>Specify the number of pseudo-soft registers which are used for thecode generation.  The maximum number is 32.  Using more pseudo-softregister may or may not result in better code depending on the program. The default is 4 for 68HC11 and 2 for 68HC12.   </dl>   </body></html>
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