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<div class="section" id="ecmusefindmodules">
<span id="module:ECMUseFindModules"></span><h1>ECMUseFindModules<a class="headerlink" href="#ecmusefindmodules" title="Permalink to this headline">¶</a></h1>
<p>Selectively use some of the find modules provided by extra-cmake-modules.</p>
<p>This module is automatically available once extra-cmake-modules has been
found, so it is not necessary to <code class="docutils literal notranslate"><span class="pre">include(ECMUseFindModules)</span></code> explicitly.</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">ecm_use_find_modules</span><span class="p">(</span><span class="n">DIR</span> <span class="o"><</span><span class="nb">dir</span><span class="o">></span>
<span class="n">MODULES</span> <span class="n">module1</span><span class="o">.</span><span class="n">cmake</span> <span class="p">[</span><span class="n">module2</span><span class="o">.</span><span class="n">cmake</span> <span class="p">[</span><span class="o">...</span><span class="p">]]</span>
<span class="p">[</span><span class="n">NO_OVERRIDE</span><span class="p">])</span>
</pre></div>
</div>
<p>This allows selective use of the find modules provided by ECM, including
deferring to CMake’s versions of those modules if it has them. Rather than
adding <code class="docutils literal notranslate"><span class="pre">${ECM_FIND_MODULE_DIR}</span></code> to <code class="docutils literal notranslate"><span class="pre">CMAKE_MODULE_PATH</span></code>, you use
ecm_use_find_modules() to copy the modules you want to a local (build)
directory, and add that to <code class="docutils literal notranslate"><span class="pre">CMAKE_MODULE_PATH</span></code>.</p>
<p>The find modules given to MODULES will be copied to the directory given by DIR
(which should be located in <code class="docutils literal notranslate"><span class="pre">${CMAKE_BINARY_DIR}</span></code> and added to
<code class="docutils literal notranslate"><span class="pre">CMAKE_MODULE_PATH</span></code>). If NO_OVERRIDE is given, only modules not also
provided by CMake will be copied.</p>
<p>Example:</p>
<div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nb">find_package</span><span class="p">(</span><span class="s">ECM</span> <span class="s">REQUIRED</span><span class="p">)</span>
<span class="nb">ecm_use_find_modules</span><span class="p">(</span>
<span class="s">DIR</span> <span class="o">${</span><span class="nv">CMAKE_BINARY_DIR</span><span class="o">}</span><span class="s">/cmake</span>
<span class="s">MODULES</span> <span class="s">FindEGL.cmake</span>
<span class="s">NO_OVERRIDE</span>
<span class="p">)</span>
<span class="nb">set</span><span class="p">(</span><span class="s">CMAKE_MODULE_PATH</span> <span class="o">${</span><span class="nv">CMAKE_BINARY_DIR</span><span class="o">}</span><span class="s">/cmake</span><span class="p">)</span>
</pre></div>
</div>
<p>This example will make <code class="docutils literal notranslate"><span class="pre">FindEGL.cmake</span></code> available in your project, but only
as long as it is not yet part of CMake. Calls to <code class="docutils literal notranslate"><span class="pre">find_package(EGL)</span></code> will
then make use of this copied module (or the CMake module if it exists).</p>
<p>Another possible use for this macro is to take copies of find modules that can
be installed along with config files if they are required as a dependency (for
example, if targets provided by the find module are in the link interface of a
library).</p>
<p>Since pre-1.0.0.</p>
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