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  <section id="findprotobuf">
<span id="module:FindProtobuf"></span><h1>FindProtobuf<a class="headerlink" href="#findprotobuf" title="Permalink to this heading">¶</a></h1>
<p>Locate and configure the Google Protocol Buffers library.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.6: </span>Support for <span class="target" id="index-0-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a> version checks.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.6: </span>All input and output variables use the <code class="docutils literal notranslate"><span class="pre">Protobuf_</span></code> prefix.
Variables with <code class="docutils literal notranslate"><span class="pre">PROTOBUF_</span></code> prefix are still supported for compatibility.</p>
</div>
<p>The following variables can be set and are optional:</p>
<dl>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_SRC_ROOT_FOLDER</span></code></dt><dd><p>When compiling with MSVC, if this cache variable is set
the protobuf-default VS project build locations
(vsprojects/Debug and vsprojects/Release
or vsprojects/x64/Debug and vsprojects/x64/Release)
will be searched for libraries and binaries.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_IMPORT_DIRS</span></code></dt><dd><p>List of additional directories to be searched for
imported .proto files.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_DEBUG</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.6.</span></p>
</div>
<p>Show debug messages.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_USE_STATIC_LIBS</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.9.</span></p>
</div>
<p>Set to ON to force the use of the static libraries.
Default is OFF.</p>
</dd>
</dl>
<p>Defines the following variables:</p>
<dl>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_FOUND</span></code></dt><dd><p>Found the Google Protocol Buffers library
(libprotobuf &amp; header files)</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_VERSION</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.6.</span></p>
</div>
<p>Version of package found.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_INCLUDE_DIRS</span></code></dt><dd><p>Include directories for Google Protocol Buffers</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_LIBRARIES</span></code></dt><dd><p>The protobuf libraries</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_PROTOC_LIBRARIES</span></code></dt><dd><p>The protoc libraries</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_LITE_LIBRARIES</span></code></dt><dd><p>The protobuf-lite libraries</p>
</dd>
</dl>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.9: </span>The following <span class="target" id="index-0-prop_tgt:IMPORTED"></span><a class="reference internal" href="../prop_tgt/IMPORTED.html#prop_tgt:IMPORTED" title="IMPORTED"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">IMPORTED</span></code></a> targets are also defined:</p>
</div>
<dl>
<dt><code class="docutils literal notranslate"><span class="pre">protobuf::libprotobuf</span></code></dt><dd><p>The protobuf library.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">protobuf::libprotobuf-lite</span></code></dt><dd><p>The protobuf lite library.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">protobuf::libprotoc</span></code></dt><dd><p>The protoc library.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">protobuf::protoc</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.10: </span>The protoc compiler.</p>
</div>
</dd>
</dl>
<p>The following cache variables are also available to set or use:</p>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_LIBRARY</span></code></dt><dd><p>The protobuf library</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_PROTOC_LIBRARY</span></code></dt><dd><p>The protoc library</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_INCLUDE_DIR</span></code></dt><dd><p>The include directory for protocol buffers</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_PROTOC_EXECUTABLE</span></code></dt><dd><p>The protoc compiler</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_LIBRARY_DEBUG</span></code></dt><dd><p>The protobuf library (debug)</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_PROTOC_LIBRARY_DEBUG</span></code></dt><dd><p>The protoc library (debug)</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_LITE_LIBRARY</span></code></dt><dd><p>The protobuf lite library</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">Protobuf_LITE_LIBRARY_DEBUG</span></code></dt><dd><p>The protobuf lite library (debug)</p>
</dd>
</dl>
<p>Example:</p>
<div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">find_package(</span><span class="nb">Protobuf</span><span class="w"> </span><span class="no">REQUIRED</span><span class="nf">)</span><span class="w"></span>
<span class="nf">include_directories(</span><span class="o">${</span><span class="nt">Protobuf_INCLUDE_DIRS</span><span class="o">}</span><span class="nf">)</span><span class="w"></span>
<span class="nf">include_directories(</span><span class="o">${</span><span class="nt">CMAKE_CURRENT_BINARY_DIR</span><span class="o">}</span><span class="nf">)</span><span class="w"></span>
<span class="nf">protobuf_generate_cpp(</span><span class="no">PROTO_SRCS</span><span class="w"> </span><span class="no">PROTO_HDRS</span><span class="w"> </span><span class="nb">foo.proto</span><span class="nf">)</span><span class="w"></span>
<span class="nf">protobuf_generate_cpp(</span><span class="no">PROTO_SRCS</span><span class="w"> </span><span class="no">PROTO_HDRS</span><span class="w"> </span><span class="no">EXPORT_MACRO</span><span class="w"> </span><span class="no">DLL_EXPORT</span><span class="w"> </span><span class="nb">foo.proto</span><span class="nf">)</span><span class="w"></span>
<span class="nf">protobuf_generate_cpp(</span><span class="no">PROTO_SRCS</span><span class="w"> </span><span class="no">PROTO_HDRS</span><span class="w"> </span><span class="no">DESCRIPTORS</span><span class="w"> </span><span class="no">PROTO_DESCS</span><span class="w"> </span><span class="nb">foo.proto</span><span class="nf">)</span><span class="w"></span>
<span class="nf">protobuf_generate_python(</span><span class="no">PROTO_PY</span><span class="w"> </span><span class="nb">foo.proto</span><span class="nf">)</span><span class="w"></span>
<span class="nf">add_executable(</span><span class="nb">bar</span><span class="w"> </span><span class="nb">bar.cc</span><span class="w"> </span><span class="o">${</span><span class="nt">PROTO_SRCS</span><span class="o">}</span><span class="w"> </span><span class="o">${</span><span class="nt">PROTO_HDRS</span><span class="o">}</span><span class="nf">)</span><span class="w"></span>
<span class="nf">target_link_libraries(</span><span class="nb">bar</span><span class="w"> </span><span class="o">${</span><span class="nt">Protobuf_LIBRARIES</span><span class="o">}</span><span class="nf">)</span><span class="w"></span>
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The <code class="docutils literal notranslate"><span class="pre">protobuf_generate_cpp</span></code> and <code class="docutils literal notranslate"><span class="pre">protobuf_generate_python</span></code>
functions and <span class="target" id="index-0-command:add_executable"></span><a class="reference internal" href="../command/add_executable.html#command:add_executable" title="add_executable"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_executable()</span></code></a> or <span class="target" id="index-0-command:add_library"></span><a class="reference internal" href="../command/add_library.html#command:add_library" title="add_library"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_library()</span></code></a>
calls only work properly within the same directory.</p>
</div>
<dl class="cmake command">
<dt class="sig sig-object cmake" id="command:protobuf_generate_cpp">
<span class="sig-name descname"><span class="pre">protobuf_generate_cpp</span></span><a class="headerlink" href="#command:protobuf_generate_cpp" title="Permalink to this definition">¶</a></dt>
<dd><p>Add custom commands to process <code class="docutils literal notranslate"><span class="pre">.proto</span></code> files to C++:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>protobuf_generate_cpp (&lt;SRCS&gt; &lt;HDRS&gt;
    [DESCRIPTORS &lt;DESC&gt;] [EXPORT_MACRO &lt;MACRO&gt;] [&lt;ARGN&gt;...])
</pre></div>
</div>
<dl>
<dt><code class="docutils literal notranslate"><span class="pre">SRCS</span></code></dt><dd><p>Variable to define with autogenerated source files</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">HDRS</span></code></dt><dd><p>Variable to define with autogenerated header files</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">DESCRIPTORS</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.10: </span>Variable to define with autogenerated descriptor files, if requested.</p>
</div>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">EXPORT_MACRO</span></code></dt><dd><p>is a macro which should expand to <code class="docutils literal notranslate"><span class="pre">__declspec(dllexport)</span></code> or
<code class="docutils literal notranslate"><span class="pre">__declspec(dllimport)</span></code> depending on what is being compiled.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">ARGN</span></code></dt><dd><p><code class="docutils literal notranslate"><span class="pre">.proto</span></code> files</p>
</dd>
</dl>
</dd></dl>

<dl class="cmake command">
<dt class="sig sig-object cmake" id="command:protobuf_generate_python">
<span class="sig-name descname"><span class="pre">protobuf_generate_python</span></span><a class="headerlink" href="#command:protobuf_generate_python" title="Permalink to this definition">¶</a></dt>
<dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.4.</span></p>
</div>
<p>Add custom commands to process <code class="docutils literal notranslate"><span class="pre">.proto</span></code> files to Python:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>protobuf_generate_python (&lt;PY&gt; [&lt;ARGN&gt;...])
</pre></div>
</div>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">PY</span></code></dt><dd><p>Variable to define with autogenerated Python files</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">ARGN</span></code></dt><dd><p><code class="docutils literal notranslate"><span class="pre">.proto</span></code> files</p>
</dd>
</dl>
</dd></dl>

</section>


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