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<h3 class="section">C.4 Specifying Names for Hosts and Targets</h3>

<p>The specifications used for hosts and targets in the <samp><span class="file">configure</span></samp>
script are based on a three-part naming scheme, but some short predefined
aliases are also supported.  The full naming scheme encodes three pieces
of information in the following pattern:

<pre class="smallexample">     <var>architecture</var>-<var>vendor</var>-<var>os</var>
</pre>
   <p>For example, you can use the alias <code>sun4</code> as a <var>host</var> argument,
or as the value for <var>target</var> in a <code>--target=</code><var>target</var>
option.  The equivalent full name is &lsquo;<samp><span class="samp">sparc-sun-sunos4</span></samp>&rsquo;.

   <p>The <samp><span class="file">configure</span></samp> script accompanying <span class="sc">gdb</span> does not provide
any query facility to list all supported host and target names or
aliases.  <samp><span class="file">configure</span></samp> calls the Bourne shell script
<code>config.sub</code> to map abbreviations to full names; you can read the
script, if you wish, or you can use it to test your guesses on
abbreviations&mdash;for example:

<pre class="smallexample">     % sh config.sub i386-linux
     i386-pc-linux-gnu
     % sh config.sub alpha-linux
     alpha-unknown-linux-gnu
     % sh config.sub hp9k700
     hppa1.1-hp-hpux
     % sh config.sub sun4
     sparc-sun-sunos4.1.1
     % sh config.sub sun3
     m68k-sun-sunos4.1.1
     % sh config.sub i986v
     Invalid configuration `i986v': machine `i986v' not recognized
</pre>
   <p class="noindent"><code>config.sub</code> is also distributed in the <span class="sc">gdb</span> source
directory (<samp><span class="file">gdb-8.3.0.20190709-git</span></samp>, for version 8.3.0.20190709-git).

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