📄 target-selection.html
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Node:<a name="Target%20Selection">Target Selection</a>,
Next:<a rel="next" accesskey="n" href="Architecture-Selection.html#Architecture%20Selection">Architecture Selection</a>,
Up:<a rel="up" accesskey="u" href="Selecting-The-Target-System.html#Selecting%20The%20Target%20System">Selecting The Target System</a>
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<h3 class="section">Target Selection</h3>
<p>A <dfn>target</dfn> is an object file format. A given target may be
supported for multiple architectures (see <a href="Architecture-Selection.html#Architecture%20Selection">Architecture Selection</a>).
A target selection may also have variations for different operating
systems or architectures.
<p>The command to list valid target values is <code>objdump -i</code>
(the first column of output contains the relevant information).
<p>Some sample values are: <code>a.out-hp300bsd</code>, <code>ecoff-littlemips</code>,
<code>a.out-sunos-big</code>.
<p>You can also specify a target using a configuration triplet. This is
the same sort of name that is passed to <code>configure</code> to specify a
target. When you use a configuration triplet as an argument, it must be
fully canonicalized. You can see the canonical version of a triplet by
running the shell script <code>config.sub</code> which is included with the
sources.
<p>Some sample configuration triplets are: <code>m68k-hp-bsd</code>,
<code>mips-dec-ultrix</code>, <code>sparc-sun-sunos</code>.
<h4 class="subheading"><code>objdump</code> Target</h4>
<p>Ways to specify:
<ol type=1 start=1>
<li>command line option: <code>-b</code> or <code>--target</code>
<li>environment variable <code>GNUTARGET</code>
<li>deduced from the input file
</ol>
<h4 class="subheading"><code>objcopy</code> and <code>strip</code> Input Target</h4>
<p>Ways to specify:
<ol type=1 start=1>
<li>command line options: <code>-I</code> or <code>--input-target</code>, or <code>-F</code> or <code>--target</code>
<li>environment variable <code>GNUTARGET</code>
<li>deduced from the input file
</ol>
<h4 class="subheading"><code>objcopy</code> and <code>strip</code> Output Target</h4>
<p>Ways to specify:
<ol type=1 start=1>
<li>command line options: <code>-O</code> or <code>--output-target</code>, or <code>-F</code> or <code>--target</code>
<li>the input target (see "<code>objcopy</code> and <code>strip</code> Input Target" above)
<li>environment variable <code>GNUTARGET</code>
<li>deduced from the input file
</ol>
<h4 class="subheading"><code>nm</code>, <code>size</code>, and <code>strings</code> Target</h4>
<p>Ways to specify:
<ol type=1 start=1>
<li>command line option: <code>--target</code>
<li>environment variable <code>GNUTARGET</code>
<li>deduced from the input file
</ol>
<h4 class="subheading">Linker Input Target</h4>
<p>Ways to specify:
<ol type=1 start=1>
<li>command line option: <code>-b</code> or <code>--format</code>
(see <a href="../ld.info/Options.html#Options">Options</a>)
<li>script command <code>TARGET</code>
(see <a href="../ld.info/Format-Commands.html#Format%20Commands">Format Commands</a>)
<li>environment variable <code>GNUTARGET</code>
(see <a href="../ld.info/Environment.html#Environment">Environment</a>)
<li>the default target of the selected linker emulation
(see <a href="Linker-Emulation-Selection.html#Linker%20Emulation%20Selection">Linker Emulation Selection</a>)
</ol>
<h4 class="subheading">Linker Output Target</h4>
<p>Ways to specify:
<ol type=1 start=1>
<li>command line option: <code>-oformat</code>
(see <a href="../ld.info/Options.html#Options">Options</a>)
<li>script command <code>OUTPUT_FORMAT</code>
(see <a href="../ld.info/Format-Commands.html#Format%20Commands">Format Commands</a>)
<li>the linker input target (see "Linker Input Target" above)
</ol>
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