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75 lines
3.5 KiB
HTML
75 lines
3.5 KiB
HTML
4 years ago
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<html lang="en">
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<head>
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<title>Command Line - 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 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Overview.html#Overview" title="Overview">
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<link rel="prev" href="Object-Formats.html#Object-Formats" title="Object Formats">
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<link rel="next" href="Input-Files.html#Input-Files" title="Input Files">
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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) 1991-2015 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 1.3
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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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-->
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<style type="text/css"><!--
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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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<a name="Command-Line"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Input-Files.html#Input-Files">Input Files</a>,
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Previous: <a rel="previous" accesskey="p" href="Object-Formats.html#Object-Formats">Object Formats</a>,
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Up: <a rel="up" accesskey="u" href="Overview.html#Overview">Overview</a>
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<hr>
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</div>
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<h3 class="section">1.4 Command Line</h3>
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<p><a name="index-command-line-conventions-25"></a>
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After the program name <samp><span class="command">as</span></samp>, the command line may contain
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options and file names. Options may appear in any order, and may be
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before, after, or between file names. The order of file names is
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significant.
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<p><a name="index-standard-input_002c-as-input-file-26"></a><a name="index-g_t_002d_002d-27"></a><samp><span class="file">--</span></samp> (two hyphens) by itself names the standard input file
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explicitly, as one of the files for <samp><span class="command">as</span></samp> to assemble.
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<p><a name="index-options_002c-command-line-28"></a>Except for ‘<samp><span class="samp">--</span></samp>’ any command line argument that begins with a
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hyphen (‘<samp><span class="samp">-</span></samp>’) is an option. Each option changes the behavior of
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<samp><span class="command">as</span></samp>. No option changes the way another option works. An
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option is a ‘<samp><span class="samp">-</span></samp>’ followed by one or more letters; the case of
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the letter is important. All options are optional.
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<p>Some options expect exactly one file name to follow them. The file
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name may either immediately follow the option's letter (compatible
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with older assemblers) or it may be the next command argument (<span class="sc">gnu</span>
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standard). These two command lines are equivalent:
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<pre class="smallexample"> as -o my-object-file.o mumble.s
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as -omy-object-file.o mumble.s
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</pre>
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</body></html>
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