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  <section id="cmake-cuda-host-compiler">
<span id="variable:CMAKE_CUDA_HOST_COMPILER"></span><h1>CMAKE_CUDA_HOST_COMPILER<a class="headerlink" href="#cmake-cuda-host-compiler" title="Permalink to this heading">ΒΆ</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.10.</span></p>
</div>
<p>When <span class="target" id="index-0-variable:CMAKE_&lt;LANG&gt;_COMPILER_ID"></span><a class="reference internal" href="CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_ID"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CUDA_COMPILER_ID</span></code></a> is
<code class="docutils literal notranslate"><span class="pre">NVIDIA</span></code>, <code class="docutils literal notranslate"><span class="pre">CMAKE_CUDA_HOST_COMPILER</span></code> selects the compiler executable to use
when compiling host code for <code class="docutils literal notranslate"><span class="pre">CUDA</span></code> language files.
This maps to the <code class="docutils literal notranslate"><span class="pre">nvcc</span> <span class="pre">-ccbin</span></code> option.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">CMAKE_CUDA_HOST_COMPILER</span></code> variable may be set explicitly before CUDA is
first enabled by a <span class="target" id="index-0-command:project"></span><a class="reference internal" href="../command/project.html#command:project" title="project"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">project()</span></code></a> or <span class="target" id="index-0-command:enable_language"></span><a class="reference internal" href="../command/enable_language.html#command:enable_language" title="enable_language"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">enable_language()</span></code></a> command.
This can be done via <code class="docutils literal notranslate"><span class="pre">-DCMAKE_CUDA_HOST_COMPILER=...</span></code> on the command line
or in a <a class="reference internal" href="../manual/cmake-toolchains.7.html#cross-compiling-toolchain"><span class="std std-ref">toolchain file</span></a>.  Or, one may set
the <span class="target" id="index-0-envvar:CUDAHOSTCXX"></span><a class="reference internal" href="../envvar/CUDAHOSTCXX.html#envvar:CUDAHOSTCXX" title="CUDAHOSTCXX"><code class="xref cmake cmake-envvar docutils literal notranslate"><span class="pre">CUDAHOSTCXX</span></code></a> environment variable to provide a default value.</p>
<p>Once the CUDA language is enabled, the <code class="docutils literal notranslate"><span class="pre">CMAKE_CUDA_HOST_COMPILER</span></code> variable
is read-only and changes to it are undefined behavior.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Since <code class="docutils literal notranslate"><span class="pre">CMAKE_CUDA_HOST_COMPILER</span></code> is meaningful only when the
<span class="target" id="index-1-variable:CMAKE_&lt;LANG&gt;_COMPILER_ID"></span><a class="reference internal" href="CMAKE_LANG_COMPILER_ID.html#variable:CMAKE_&lt;LANG&gt;_COMPILER_ID" title="CMAKE_&lt;LANG&gt;_COMPILER_ID"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CUDA_COMPILER_ID</span></code></a> is <code class="docutils literal notranslate"><span class="pre">NVIDIA</span></code>,
it does not make sense to set <code class="docutils literal notranslate"><span class="pre">CMAKE_CUDA_HOST_COMPILER</span></code> without also
setting <code class="docutils literal notranslate"><span class="pre">CMAKE_CUDA_COMPILER</span></code> to NVCC.</p>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Ignored when using <a class="reference internal" href="../manual/cmake-generators.7.html#visual-studio-generators"><span class="std std-ref">Visual Studio Generators</span></a>.</p>
</div>
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