command-line.html

来自「gcc手册」· HTML 代码 · 共 46 行

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Node:<a name="Command%20Line">Command Line</a>,

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<h3 class="section">Command Line</h3>



   <p>After the program name <code>as</code>, the command line may contain

options and file names.  Options may appear in any order, and may be

before, after, or between file names.  The order of file names is

significant.



   <p><code>--</code> (two hyphens) by itself names the standard input file

explicitly, as one of the files for <code>as</code> to assemble.



   <p>Except for <code>--</code> any command line argument that begins with a

hyphen (<code>-</code>) is an option.  Each option changes the behavior of

<code>as</code>.  No option changes the way another option works.  An

option is a <code>-</code> followed by one or more letters; the case of

the letter is important.   All options are optional.



   <p>Some options expect exactly one file name to follow them.  The file

name may either immediately follow the option's letter (compatible

with older assemblers) or it may be the next command argument (<small>GNU</small>

standard).  These two command lines are equivalent:



<pre class="smallexample">     as -o my-object-file.o mumble.s

     as -omy-object-file.o mumble.s

     </pre>



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