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| <title>GNU Binary Utilities: Target Selection</title> |
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| <a name="Target-Selection"></a> |
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| Next: <a href="Architecture-Selection.html#Architecture-Selection" accesskey="n" rel="next">Architecture Selection</a>, Up: <a href="Selecting-the-Target-System.html#Selecting-the-Target-System" accesskey="u" rel="up">Selecting the Target System</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Binutils-Index.html#Binutils-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Target-Selection-1"></a> |
| <h3 class="section">18.1 Target Selection</h3> |
| |
| <p>A <em>target</em> is an object file format. A given target may be |
| supported for multiple architectures (see <a href="Architecture-Selection.html#Architecture-Selection">Architecture Selection</a>). |
| A target selection may also have variations for different operating |
| systems or architectures. |
| </p> |
| <p>The command to list valid target values is ‘<samp>objdump -i</samp>’ |
| (the first column of output contains the relevant information). |
| </p> |
| <p>Some sample values are: ‘<samp>a.out-hp300bsd</samp>’, ‘<samp>ecoff-littlemips</samp>’, |
| ‘<samp>a.out-sunos-big</samp>’. |
| </p> |
| <p>You can also specify a target using a configuration triplet. This is |
| the same sort of name that is passed to <samp>configure</samp> 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 <samp>config.sub</samp> which is included with the |
| sources. |
| </p> |
| <p>Some sample configuration triplets are: ‘<samp>m68k-hp-bsd</samp>’, |
| ‘<samp>mips-dec-ultrix</samp>’, ‘<samp>sparc-sun-sunos</samp>’. |
| </p> |
| <a name="objdump-Target"></a> |
| <h4 class="subheading"><code>objdump</code> Target</h4> |
| |
| <p>Ways to specify: |
| </p> |
| <ol> |
| <li> command line option: <samp>-b</samp> or <samp>--target</samp> |
| |
| </li><li> environment variable <code>GNUTARGET</code> |
| |
| </li><li> deduced from the input file |
| </li></ol> |
| |
| <a name="objcopy-and-strip-Input-Target"></a> |
| <h4 class="subheading"><code>objcopy</code> and <code>strip</code> Input Target</h4> |
| |
| <p>Ways to specify: |
| </p> |
| <ol> |
| <li> command line options: <samp>-I</samp> or <samp>--input-target</samp>, or <samp>-F</samp> or <samp>--target</samp> |
| |
| </li><li> environment variable <code>GNUTARGET</code> |
| |
| </li><li> deduced from the input file |
| </li></ol> |
| |
| <a name="objcopy-and-strip-Output-Target"></a> |
| <h4 class="subheading"><code>objcopy</code> and <code>strip</code> Output Target</h4> |
| |
| <p>Ways to specify: |
| </p> |
| <ol> |
| <li> command line options: <samp>-O</samp> or <samp>--output-target</samp>, or <samp>-F</samp> or <samp>--target</samp> |
| |
| </li><li> the input target (see “<code>objcopy</code> and <code>strip</code> Input Target” above) |
| |
| </li><li> environment variable <code>GNUTARGET</code> |
| |
| </li><li> deduced from the input file |
| </li></ol> |
| |
| <a name="nm_002c-size_002c-and-strings-Target"></a> |
| <h4 class="subheading"><code>nm</code>, <code>size</code>, and <code>strings</code> Target</h4> |
| |
| <p>Ways to specify: |
| </p> |
| <ol> |
| <li> command line option: <samp>--target</samp> |
| |
| </li><li> environment variable <code>GNUTARGET</code> |
| |
| </li><li> deduced from the input file |
| </li></ol> |
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