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96 lines
4.7 KiB
HTML
<html lang="en">
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<head>
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<title>Invoking - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.7">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="prev" href="Overview.html#Overview" title="Overview">
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<link rel="next" href="Syntax.html#Syntax" title="Syntax">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
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2006, 2007 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.1
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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man end-->
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalldisplay { font-family:inherit; font-size:smaller }
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pre.smallformat { font-family:inherit; font-size:smaller }
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--></style>
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</head>
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<body>
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<div class="node">
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<p>
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<a name="Invoking"></a>Next: <a rel="next" accesskey="n" href="Syntax.html#Syntax">Syntax</a>,
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Previous: <a rel="previous" accesskey="p" href="Overview.html#Overview">Overview</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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<hr><br>
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</div>
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<h2 class="chapter">2 Command-Line Options</h2>
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<p><a name="index-options_002c-all-versions-of-assembler-46"></a>This chapter describes command-line options available in <em>all</em>
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versions of the <span class="sc">gnu</span> assembler; see <a href="Machine-Dependencies.html#Machine-Dependencies">Machine Dependencies</a>,
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for options specific
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to particular machine architectures.
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<!-- man begin DESCRIPTION -->
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<p>If you are invoking <span class="command">as</span> via the <span class="sc">gnu</span> C compiler,
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you can use the <span class="samp">-Wa</span> option to pass arguments through to the assembler.
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The assembler arguments must be separated from each other (and the <span class="samp">-Wa</span>)
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by commas. For example:
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<pre class="smallexample"> gcc -c -g -O -Wa,-alh,-L file.c
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</pre>
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<p class="noindent">This passes two options to the assembler: <span class="samp">-alh</span> (emit a listing to
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standard output with high-level and assembly source) and <span class="samp">-L</span> (retain
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local symbols in the symbol table).
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<p>Usually you do not need to use this <span class="samp">-Wa</span> mechanism, since many compiler
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command-line options are automatically passed to the assembler by the compiler.
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(You can call the <span class="sc">gnu</span> compiler driver with the <span class="samp">-v</span> option to see
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precisely what options it passes to each compilation pass, including the
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assembler.)
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<!-- man end -->
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<ul class="menu">
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<li><a accesskey="1" href="a.html#a">a</a>: -a[cdghlns] enable listings
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<li><a accesskey="2" href="alternate.html#alternate">alternate</a>: --alternate enable alternate macro syntax
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<li><a accesskey="3" href="D.html#D">D</a>: -D for compatibility
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<li><a accesskey="4" href="f.html#f">f</a>: -f to work faster
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<li><a accesskey="5" href="I.html#I">I</a>: -I for .include search path
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<li><a accesskey="6" href="K.html#K">K</a>: -K for difference tables
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<li><a accesskey="7" href="L.html#L">L</a>: -L to retain local symbols
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<li><a accesskey="8" href="listing.html#listing">listing</a>: --listing-XXX to configure listing output
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<li><a accesskey="9" href="M.html#M">M</a>: -M or --mri to assemble in MRI compatibility mode
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<li><a href="MD.html#MD">MD</a>: --MD for dependency tracking
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<li><a href="o.html#o">o</a>: -o to name the object file
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<li><a href="R.html#R">R</a>: -R to join data and text sections
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<li><a href="statistics.html#statistics">statistics</a>: --statistics to see statistics about assembly
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<li><a href="traditional_002dformat.html#traditional_002dformat">traditional-format</a>: --traditional-format for compatible output
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<li><a href="v.html#v">v</a>: -v to announce version
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<li><a href="W.html#W">W</a>: -W, --no-warn, --warn, --fatal-warnings to control warnings
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<li><a href="Z.html#Z">Z</a>: -Z to make object file even after errors
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</ul>
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</body></html>
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