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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="IA-64%20Options">IA-64 Options</a>,Next:&nbsp;<a rel="next" accesskey="n" href="S-390-and-zSeries-Options.html#S%2f390%20and%20zSeries%20Options">S/390 and zSeries Options</a>,Previous:&nbsp;<a rel="previous" accesskey="p" href="MCore-Options.html#MCore%20Options">MCore Options</a>,Up:&nbsp;<a rel="up" accesskey="u" href="Submodel-Options.html#Submodel%20Options">Submodel Options</a><hr><br></div><h3 class="subsection">IA-64 Options</h4><p>These are the <code>-m</code> options defined for the Intel IA-64 architecture.     <dl><dt><code>-mbig-endian</code>     <dd>Generate code for a big endian target.  This is the default for HP-UX.     <br><dt><code>-mlittle-endian</code>     <dd>Generate code for a little endian target.  This is the default for AIX5and GNU/Linux.     <br><dt><code>-mgnu-as</code>     <dd><dt><code>-mno-gnu-as</code>     <dd>Generate (or don't) code for the GNU assembler.  This is the default.     <br><dt><code>-mgnu-ld</code>     <dd><dt><code>-mno-gnu-ld</code>     <dd>Generate (or don't) code for the GNU linker.  This is the default.     <br><dt><code>-mno-pic</code>     <dd>Generate code that does not use a global pointer register.  The resultis not position independent code, and violates the IA-64 ABI.     <br><dt><code>-mvolatile-asm-stop</code>     <dd><dt><code>-mno-volatile-asm-stop</code>     <dd>Generate (or don't) a stop bit immediately before and after volatile asmstatements.     <br><dt><code>-mb-step</code>     <dd>Generate code that works around Itanium B step errata.     <br><dt><code>-mregister-names</code>     <dd><dt><code>-mno-register-names</code>     <dd>Generate (or don't) <code>in</code>, <code>loc</code>, and <code>out</code> register names forthe stacked registers.  This may make assembler output more readable.     <br><dt><code>-mno-sdata</code>     <dd><dt><code>-msdata</code>     <dd>Disable (or enable) optimizations that use the small data section.  This maybe useful for working around optimizer bugs.     <br><dt><code>-mconstant-gp</code>     <dd>Generate code that uses a single constant global pointer value.  This isuseful when compiling kernel code.     <br><dt><code>-mauto-pic</code>     <dd>Generate code that is self-relocatable.  This implies <code>-mconstant-gp</code>. This is useful when compiling firmware code.     <br><dt><code>-minline-float-divide-min-latency</code>     <dd>Generate code for inline divides of floating point valuesusing the minimum latency algorithm.     <br><dt><code>-minline-float-divide-max-throughput</code>     <dd>Generate code for inline divides of floating point valuesusing the maximum throughput algorithm.     <br><dt><code>-minline-int-divide-min-latency</code>     <dd>Generate code for inline divides of integer valuesusing the minimum latency algorithm.     <br><dt><code>-minline-int-divide-max-throughput</code>     <dd>Generate code for inline divides of integer valuesusing the maximum throughput algorithm.     <br><dt><code>-mno-dwarf2-asm</code>     <dd><dt><code>-mdwarf2-asm</code>     <dd>Don't (or do) generate assembler code for the DWARF2 line number debugginginfo.  This may be useful when not using the GNU assembler.     <br><dt><code>-mfixed-range=</code><var>register-range</var><code></code>     <dd>Generate code treating the given register range as fixed registers. A fixed register is one that the register allocator can not use.  This isuseful when compiling kernel code.  A register range is specified astwo registers separated by a dash.  Multiple register ranges can bespecified separated by a comma.     <br><dt><code>-mearly-stop-bits</code>     <dd><dt><code>-mno-early-stop-bits</code>     <dd>Allow stop bits to be placed earlier than immediately preceding theinstruction that triggered the stop bit.  This can improve instructionscheduling, but does not always do so. </dl>   </body></html>
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