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<h2 class="chapter">2 Command-Line Options</h2>
<p><a name="index-options_002c-all-versions-of-assembler-46"></a>This chapter describes command-line options available in <em>all</em>
versions of the <span class="sc">gnu</span> assembler; see <a href="Machine-Dependencies.html#Machine-Dependencies">Machine Dependencies</a>,
for options specific
to particular machine architectures.
<!-- man begin DESCRIPTION -->
<p>If you are invoking <samp><span class="command">as</span></samp> via the <span class="sc">gnu</span> C compiler,
you can use the ‘<samp><span class="samp">-Wa</span></samp>’ option to pass arguments through to the assembler.
The assembler arguments must be separated from each other (and the ‘<samp><span class="samp">-Wa</span></samp>’)
by commas. For example:
<pre class="smallexample"> gcc -c -g -O -Wa,-alh,-L file.c
</pre>
<p class="noindent">This passes two options to the assembler: ‘<samp><span class="samp">-alh</span></samp>’ (emit a listing to
standard output with high-level and assembly source) and ‘<samp><span class="samp">-L</span></samp>’ (retain
local symbols in the symbol table).
<p>Usually you do not need to use this ‘<samp><span class="samp">-Wa</span></samp>’ mechanism, since many compiler
command-line options are automatically passed to the assembler by the compiler.
(You can call the <span class="sc">gnu</span> compiler driver with the ‘<samp><span class="samp">-v</span></samp>’ option to see
precisely what options it passes to each compilation pass, including the
assembler.)
<!-- man end -->
<ul class="menu">
<li><a accesskey="1" href="a.html#a">a</a>: -a[cdghlns] enable listings
<li><a accesskey="2" href="alternate.html#alternate">alternate</a>: --alternate enable alternate macro syntax
<li><a accesskey="3" href="D.html#D">D</a>: -D for compatibility
<li><a accesskey="4" href="f.html#f">f</a>: -f to work faster
<li><a accesskey="5" href="I.html#I">I</a>: -I for .include search path
<li><a accesskey="6" href="K.html#K">K</a>: -K for difference tables
<li><a accesskey="7" href="L.html#L">L</a>: -L to retain local symbols
<li><a accesskey="8" href="listing.html#listing">listing</a>: --listing-XXX to configure listing output
<li><a accesskey="9" href="M.html#M">M</a>: -M or --mri to assemble in MRI compatibility mode
<li><a href="MD.html#MD">MD</a>: --MD for dependency tracking
<li><a href="o.html#o">o</a>: -o to name the object file
<li><a href="R.html#R">R</a>: -R to join data and text sections
<li><a href="statistics.html#statistics">statistics</a>: --statistics to see statistics about assembly
<li><a href="traditional_002dformat.html#traditional_002dformat">traditional-format</a>: --traditional-format for compatible output
<li><a href="v.html#v">v</a>: -v to announce version
<li><a href="W.html#W">W</a>: -W, --no-warn, --warn, --fatal-warnings to control warnings
<li><a href="Z.html#Z">Z</a>: -Z to make object file even after errors
</ul>
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