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  <title>variable_requires &mdash; CMake 3.26.5 Documentation</title>

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  <section id="variable-requires">
<span id="command:variable_requires"></span><h1>variable_requires<a class="headerlink" href="#variable-requires" title="Permalink to this heading">ΒΆ</a></h1>
<p>Disallowed since version 3.0.  See CMake Policy <span class="target" id="index-0-policy:CMP0035"></span><a class="reference internal" href="../policy/CMP0035.html#policy:CMP0035" title="CMP0035"><code class="xref cmake cmake-policy docutils literal notranslate"><span class="pre">CMP0035</span></code></a>.</p>
<p>Use the <span class="target" id="index-0-command:if"></span><a class="reference internal" href="if.html#command:if" title="if"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">if()</span></code></a> command instead.</p>
<p>Assert satisfaction of an option's required variables.</p>
<div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">variable_requires(</span><span class="no">TEST_VARIABLE</span><span class="w"> </span><span class="no">RESULT_VARIABLE</span><span class="w"></span>
<span class="w">                  </span><span class="no">REQUIRED_VARIABLE1</span><span class="w"></span>
<span class="w">                  </span><span class="no">REQUIRED_VARIABLE2</span><span class="w"> </span><span class="p">...</span><span class="nf">)</span><span class="w"></span>
</pre></div>
</div>
<p>The first argument (<code class="docutils literal notranslate"><span class="pre">TEST_VARIABLE</span></code>) is the name of the variable to be
tested, if that variable is false nothing else is done.  If
<code class="docutils literal notranslate"><span class="pre">TEST_VARIABLE</span></code> is true, then the next argument (<code class="docutils literal notranslate"><span class="pre">RESULT_VARIABLE</span></code>)
is a variable that is set to true if all the required variables are set.
The rest of the arguments are variables that must be true or not set
to <code class="docutils literal notranslate"><span class="pre">NOTFOUND</span></code> to avoid an error.  If any are not true, an error is
reported.</p>
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