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- <a name="Invoking"></a>
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- <p>
- Next: <a href="Syntax.html#Syntax" accesskey="n" rel="next">Syntax</a>, Previous: <a href="Overview.html#Overview" accesskey="p" rel="prev">Overview</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
- </div>
- <hr>
- <a name="Command_002dLine-Options"></a>
- <h2 class="chapter">2 Command-Line Options</h2>
-
- <a name="index-options_002c-all-versions-of-assembler"></a>
- <p>This chapter describes command-line options available in <em>all</em>
- versions of the <small>GNU</small> assembler; see <a href="Machine-Dependencies.html#Machine-Dependencies">Machine Dependencies</a>,
- for options specific
- to particular machine architectures.
- </p>
-
- <p>If you are invoking <code>as</code> via the <small>GNU</small> C compiler,
- you can use the ‘<samp>-Wa</samp>’ option to pass arguments through to the assembler.
- The assembler arguments must be separated from each other (and the ‘<samp>-Wa</samp>’)
- by commas. For example:
- </p>
- <div class="smallexample">
- <pre class="smallexample">gcc -c -g -O -Wa,-alh,-L file.c
- </pre></div>
-
- <p>This passes two options to the assembler: ‘<samp>-alh</samp>’ (emit a listing to
- standard output with high-level and assembly source) and ‘<samp>-L</samp>’ (retain
- local symbols in the symbol table).
- </p>
- <p>Usually you do not need to use this ‘<samp>-Wa</samp>’ mechanism, since many compiler
- command-line options are automatically passed to the assembler by the compiler.
- (You can call the <small>GNU</small> compiler driver with the ‘<samp>-v</samp>’ option to see
- precisely what options it passes to each compilation pass, including the
- assembler.)
- </p>
-
- <table class="menu" border="0" cellspacing="0">
- <tr><td align="left" valign="top">• <a href="a.html#a" accesskey="1">a</a>:</td><td> </td><td align="left" valign="top">-a[cdghlns] enable listings
- </td></tr>
- <tr><td align="left" valign="top">• <a href="alternate.html#alternate" accesskey="2">alternate</a>:</td><td> </td><td align="left" valign="top">–alternate enable alternate macro syntax
- </td></tr>
- <tr><td align="left" valign="top">• <a href="D.html#D" accesskey="3">D</a>:</td><td> </td><td align="left" valign="top">-D for compatibility
- </td></tr>
- <tr><td align="left" valign="top">• <a href="f.html#f" accesskey="4">f</a>:</td><td> </td><td align="left" valign="top">-f to work faster
- </td></tr>
- <tr><td align="left" valign="top">• <a href="I.html#I" accesskey="5">I</a>:</td><td> </td><td align="left" valign="top">-I for .include search path
- </td></tr>
- <tr><td align="left" valign="top">• <a href="K.html#K" accesskey="6">K</a>:</td><td> </td><td align="left" valign="top">-K for difference tables
- </td></tr>
- <tr><th colspan="3" align="left" valign="top"><pre class="menu-comment">
-
- </pre></th></tr><tr><td align="left" valign="top">• <a href="L.html#L" accesskey="7">L</a>:</td><td> </td><td align="left" valign="top">-L to retain local symbols
- </td></tr>
- <tr><td align="left" valign="top">• <a href="listing.html#listing" accesskey="8">listing</a>:</td><td> </td><td align="left" valign="top">–listing-XXX to configure listing output
- </td></tr>
- <tr><td align="left" valign="top">• <a href="M.html#M" accesskey="9">M</a>:</td><td> </td><td align="left" valign="top">-M or –mri to assemble in MRI compatibility mode
- </td></tr>
- <tr><td align="left" valign="top">• <a href="MD.html#MD">MD</a>:</td><td> </td><td align="left" valign="top">–MD for dependency tracking
- </td></tr>
- <tr><td align="left" valign="top">• <a href="no_002dpad_002dsections.html#no_002dpad_002dsections">no-pad-sections</a>:</td><td> </td><td align="left" valign="top">–no-pad-sections to stop section padding
- </td></tr>
- <tr><td align="left" valign="top">• <a href="o.html#o">o</a>:</td><td> </td><td align="left" valign="top">-o to name the object file
- </td></tr>
- <tr><td align="left" valign="top">• <a href="R.html#R">R</a>:</td><td> </td><td align="left" valign="top">-R to join data and text sections
- </td></tr>
- <tr><td align="left" valign="top">• <a href="statistics.html#statistics">statistics</a>:</td><td> </td><td align="left" valign="top">–statistics to see statistics about assembly
- </td></tr>
- <tr><td align="left" valign="top">• <a href="traditional_002dformat.html#traditional_002dformat">traditional-format</a>:</td><td> </td><td align="left" valign="top">–traditional-format for compatible output
- </td></tr>
- <tr><td align="left" valign="top">• <a href="v.html#v">v</a>:</td><td> </td><td align="left" valign="top">-v to announce version
- </td></tr>
- <tr><td align="left" valign="top">• <a href="W.html#W">W</a>:</td><td> </td><td align="left" valign="top">-W, –no-warn, –warn, –fatal-warnings to control warnings
- </td></tr>
- <tr><td align="left" valign="top">• <a href="Z.html#Z">Z</a>:</td><td> </td><td align="left" valign="top">-Z to make object file even after errors
- </td></tr>
- </table>
-
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- <p>
- Next: <a href="Syntax.html#Syntax" accesskey="n" rel="next">Syntax</a>, Previous: <a href="Overview.html#Overview" accesskey="p" rel="prev">Overview</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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