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<h4 class="subsection">7.2.2 Selecting targets to which a test applies</h4>
<p>Several test directives include <var>selector</var>s to limit the targets
for which a test is run or to declare that a test is expected to fail
on particular targets.
<p>A selector is:
<ul>
<li>one or more target triplets, possibly including wildcard characters;
use ‘<samp><span class="samp">*-*-*</span></samp>’ to match any target
<li>a single effective-target keyword (see <a href="Effective_002dTarget-Keywords.html#Effective_002dTarget-Keywords">Effective-Target Keywords</a>)
<li>a logical expression
</ul>
<p>Depending on the context, the selector specifies whether a test is
skipped and reported as unsupported or is expected to fail. A context
that allows either ‘<samp><span class="samp">target</span></samp>’ or ‘<samp><span class="samp">xfail</span></samp>’ also allows
‘<samp><span class="samp">{ target </span><var>selector1</var><span class="samp"> xfail </span><var>selector2</var><span class="samp"> }</span></samp>’
to skip the test for targets that don't match <var>selector1</var> and the
test to fail for targets that match <var>selector2</var>.
<p>A selector expression appears within curly braces and uses a single
logical operator: one of ‘<samp><span class="samp">!</span></samp>’, ‘<samp><span class="samp">&&</span></samp>’, or ‘<samp><span class="samp">||</span></samp>’. An
operand is another selector expression, an effective-target keyword,
a single target triplet, or a list of target triplets within quotes or
curly braces. For example:
<pre class="smallexample"> { target { ! "hppa*-*-* ia64*-*-*" } }
{ target { powerpc*-*-* && lp64 } }
{ xfail { lp64 || vect_no_align } }
</pre>
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