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<h1>Compiling with OpenMP</h1>
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<h2> Contents </h2>
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<section id="compiling-with-openmp">
<span id="compilingwithopenmp"></span><h1>Compiling with OpenMP<a class="headerlink" href="#compiling-with-openmp" title="Link to this heading">#</a></h1>
<p>Some of Vapor’s libraries have been optimized with the OpenMP API. To build Vapor with these optimizations, ensure that your compiler supports OpenMP, and enable the following flags through <cite>ccmake</cite>,or by passing the arguments into <cite>cmake</cite>.</p>
<p>Our team builds Vapor with OpenMP with LLVM 13+ and GCC 4.2+.</p>
<section id="manually-setting-flags-with-ccmake">
<h2>Manually setting flags with ccmake<a class="headerlink" href="#manually-setting-flags-with-ccmake" title="Link to this heading">#</a></h2>
<p>To generate an optimized release build with OpenMP, set the following fields with ccmake.</p>
<div class="pst-scrollable-table-container"><table class="table">
<tbody>
<tr class="row-odd"><td><p>CPACK_BINARY_DRAGNDROP</p></td>
<td><p>ON</p></td>
</tr>
<tr class="row-even"><td><p>CMAKE_BUILD_TYPE</p></td>
<td><p>Release</p></td>
</tr>
<tr class="row-odd"><td><p>DIST_INSTALLER</p></td>
<td><p>ON</p></td>
</tr>
<tr class="row-even"><td><p>CMAKE_CXX_COMPILER</p></td>
<td><p>/path/to/your/c++/compiler</p></td>
</tr>
<tr class="row-odd"><td><p>CMAKE_C_COMPILER</p></td>
<td><p>/path/to/your/c/compiler</p></td>
</tr>
<tr class="row-even"><td><p>USE_OMP</p></td>
<td><p>ON</p></td>
</tr>
</tbody>
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<section id="command-line-cmake-build-incantation">
<h2>Command line CMake build incantation<a class="headerlink" href="#command-line-cmake-build-incantation" title="Link to this heading">#</a></h2>
<p>Alternatively, cmake can apply these arguments through command-line arguments as follows:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>cmake<span class="w"> </span><span class="se">\</span>
-DCPACK_BINARY_DRAGNDROP<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span>
-DCMAKE_BUILD_TYPE:String<span class="o">=</span>Release<span class="w"> </span><span class="se">\</span>
-DDIST_INSTALLER:string<span class="o">=</span>ON<span class="w"> </span><span class="se">\</span>
-DCMAKE_CXX_COMPILER<span class="o">=</span>/opt/local/bin/clang++<span class="w"> </span><span class="se">\</span>
-DCMAKE_C_COMPILER<span class="o">=</span>/opt/local/bin/clang<span class="w"> </span><span class="se">\</span>
-DUSE_OMP<span class="o">=</span>ON<span class="w"> </span>..<span class="w"> </span><span class="se">\</span>
<span class="o">&&</span><span class="w"> </span>make<span class="w"> </span><span class="se">\</span>
<span class="o">&&</span><span class="w"> </span>make<span class="w"> </span>installer<span class="w"> </span><span class="se">\</span>
/
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