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