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| <section id="configure-file"> | |
| <span id="command:configure_file"></span><h1>configure_file<a class="headerlink" href="#configure-file" title="Permalink to this heading">¶</a></h1> | |
| <p>Copy a file to another location and modify its contents.</p> | |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">configure_file(</span><span class="nv"><input></span><span class="w"> </span><span class="nv"><output></span> | |
| <span class="w"> </span><span class="p">[</span><span class="no">NO_SOURCE_PERMISSIONS</span><span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="no">USE_SOURCE_PERMISSIONS</span><span class="w"> </span><span class="p">|</span> | |
| <span class="w"> </span><span class="no">FILE_PERMISSIONS</span><span class="w"> </span><span class="nv"><permissions>...</span><span class="p">]</span> | |
| <span class="w"> </span><span class="p">[</span><span class="no">COPYONLY</span><span class="p">]</span><span class="w"> </span><span class="p">[</span><span class="no">ESCAPE_QUOTES</span><span class="p">]</span><span class="w"> </span><span class="p">[</span><span class="no">@ONLY</span><span class="p">]</span> | |
| <span class="w"> </span><span class="p">[</span><span class="no">NEWLINE_STYLE</span><span class="w"> </span><span class="p">[</span><span class="no">UNIX</span><span class="p">|</span><span class="no">DOS</span><span class="p">|</span><span class="no">WIN32</span><span class="p">|</span><span class="no">LF</span><span class="p">|</span><span class="no">CRLF</span><span class="p">]</span><span class="w"> </span><span class="p">]</span><span class="nf">)</span> | |
| </pre></div> | |
| </div> | |
| <p>Copies an <code class="docutils literal notranslate"><span class="pre"><input></span></code> file to an <code class="docutils literal notranslate"><span class="pre"><output></span></code> file and substitutes | |
| variable values referenced as <code class="docutils literal notranslate"><span class="pre">@VAR@</span></code>, <code class="docutils literal notranslate"><span class="pre">${VAR}</span></code>, <code class="docutils literal notranslate"><span class="pre">$CACHE{VAR}</span></code> or | |
| <code class="docutils literal notranslate"><span class="pre">$ENV{VAR}</span></code> in the input file content. Each variable reference will be | |
| replaced with the current value of the variable, or the empty string if | |
| the variable is not defined. Furthermore, input lines of the form</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#cmakedefine VAR ...</span> | |
| </pre></div> | |
| </div> | |
| <p>will be replaced with either</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define VAR ...</span> | |
| </pre></div> | |
| </div> | |
| <p>or</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cm">/* #undef VAR */</span> | |
| </pre></div> | |
| </div> | |
| <p>depending on whether <code class="docutils literal notranslate"><span class="pre">VAR</span></code> is set in CMake to any value not considered | |
| a false constant by 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. The "..." content on the | |
| line after the variable name, if any, is processed as above.</p> | |
| <p>Unlike lines of the form <code class="docutils literal notranslate"><span class="pre">#cmakedefine</span> <span class="pre">VAR</span> <span class="pre">...</span></code>, in lines of the form | |
| <code class="docutils literal notranslate"><span class="pre">#cmakedefine01</span> <span class="pre">VAR</span></code>, <code class="docutils literal notranslate"><span class="pre">VAR</span></code> itself will expand to <code class="docutils literal notranslate"><span class="pre">VAR</span> <span class="pre">0</span></code> or <code class="docutils literal notranslate"><span class="pre">VAR</span> <span class="pre">1</span></code> | |
| rather than being assigned the value <code class="docutils literal notranslate"><span class="pre">...</span></code>. Therefore, input lines of the form</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#cmakedefine01 VAR</span> | |
| </pre></div> | |
| </div> | |
| <p>will be replaced with either</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define VAR 0</span> | |
| </pre></div> | |
| </div> | |
| <p>or</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define VAR 1</span> | |
| </pre></div> | |
| </div> | |
| <p>Input lines of the form <code class="docutils literal notranslate"><span class="pre">#cmakedefine01</span> <span class="pre">VAR</span> <span class="pre">...</span></code> will expand | |
| as <code class="docutils literal notranslate"><span class="pre">#cmakedefine01</span> <span class="pre">VAR</span> <span class="pre">...</span> <span class="pre">0</span></code> or <code class="docutils literal notranslate"><span class="pre">#cmakedefine01</span> <span class="pre">VAR</span> <span class="pre">...</span> <span class="pre">1</span></code>, | |
| which may lead to undefined behavior.</p> | |
| <div class="versionadded"> | |
| <p><span class="versionmodified added">New in version 3.10: </span>The result lines (with the exception of the <code class="docutils literal notranslate"><span class="pre">#undef</span></code> comments) can be | |
| indented using spaces and/or tabs between the <code class="docutils literal notranslate"><span class="pre">#</span></code> character | |
| and the <code class="docutils literal notranslate"><span class="pre">cmakedefine</span></code> or <code class="docutils literal notranslate"><span class="pre">cmakedefine01</span></code> words. This whitespace | |
| indentation will be preserved in the output lines:</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp"># cmakedefine VAR</span> | |
| <span class="cp"># cmakedefine01 VAR</span> | |
| </pre></div> | |
| </div> | |
| <p>will be replaced, if <code class="docutils literal notranslate"><span class="pre">VAR</span></code> is defined, with</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp"># define VAR</span> | |
| <span class="cp"># define VAR 1</span> | |
| </pre></div> | |
| </div> | |
| </div> | |
| <p>If the input file is modified the build system will re-run CMake to | |
| re-configure the file and generate the build system again. | |
| The generated file is modified and its timestamp updated on subsequent | |
| cmake runs only if its content is changed.</p> | |
| <p>The arguments are:</p> | |
| <dl> | |
| <dt><code class="docutils literal notranslate"><span class="pre"><input></span></code></dt><dd><p>Path to the input file. A relative path is treated with respect to | |
| the value of <span class="target" id="index-0-variable:CMAKE_CURRENT_SOURCE_DIR"></span><a class="reference internal" href="../variable/CMAKE_CURRENT_SOURCE_DIR.html#variable:CMAKE_CURRENT_SOURCE_DIR" title="CMAKE_CURRENT_SOURCE_DIR"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CURRENT_SOURCE_DIR</span></code></a>. The input path | |
| must be a file, not a directory.</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre"><output></span></code></dt><dd><p>Path to the output file or directory. A relative path is treated | |
| with respect to the value of <span class="target" id="index-0-variable:CMAKE_CURRENT_BINARY_DIR"></span><a class="reference internal" href="../variable/CMAKE_CURRENT_BINARY_DIR.html#variable:CMAKE_CURRENT_BINARY_DIR" title="CMAKE_CURRENT_BINARY_DIR"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_CURRENT_BINARY_DIR</span></code></a>. | |
| If the path names an existing directory the output file is placed | |
| in that directory with the same file name as the input file. | |
| If the path contains non-existent directories, they are created.</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">NO_SOURCE_PERMISSIONS</span></code></dt><dd><div class="versionadded"> | |
| <p><span class="versionmodified added">New in version 3.19.</span></p> | |
| </div> | |
| <p>Do not transfer the permissions of the input file to the output file. | |
| The copied file permissions default to the standard 644 value | |
| (-rw-r--r--).</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">USE_SOURCE_PERMISSIONS</span></code></dt><dd><div class="versionadded"> | |
| <p><span class="versionmodified added">New in version 3.20.</span></p> | |
| </div> | |
| <p>Transfer the permissions of the input file to the output file. | |
| This is already the default behavior if none of the three permissions-related | |
| keywords are given (<code class="docutils literal notranslate"><span class="pre">NO_SOURCE_PERMISSIONS</span></code>, <code class="docutils literal notranslate"><span class="pre">USE_SOURCE_PERMISSIONS</span></code> | |
| or <code class="docutils literal notranslate"><span class="pre">FILE_PERMISSIONS</span></code>). The <code class="docutils literal notranslate"><span class="pre">USE_SOURCE_PERMISSIONS</span></code> keyword mostly | |
| serves as a way of making the intended behavior clearer at the call site.</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">FILE_PERMISSIONS</span> <span class="pre"><permissions>...</span></code></dt><dd><div class="versionadded"> | |
| <p><span class="versionmodified added">New in version 3.20.</span></p> | |
| </div> | |
| <p>Ignore the input file's permissions and use the specified <code class="docutils literal notranslate"><span class="pre"><permissions></span></code> | |
| for the output file instead.</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">COPYONLY</span></code></dt><dd><p>Copy the file without replacing any variable references or other | |
| content. This option may not be used with <code class="docutils literal notranslate"><span class="pre">NEWLINE_STYLE</span></code>.</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">ESCAPE_QUOTES</span></code></dt><dd><p>Escape any substituted quotes with backslashes (C-style).</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">@ONLY</span></code></dt><dd><p>Restrict variable replacement to references of the form <code class="docutils literal notranslate"><span class="pre">@VAR@</span></code>. | |
| This is useful for configuring scripts that use <code class="docutils literal notranslate"><span class="pre">${VAR}</span></code> syntax.</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">NEWLINE_STYLE</span> <span class="pre"><style></span></code></dt><dd><p>Specify the newline style for the output file. Specify | |
| <code class="docutils literal notranslate"><span class="pre">UNIX</span></code> or <code class="docutils literal notranslate"><span class="pre">LF</span></code> for <code class="docutils literal notranslate"><span class="pre">\n</span></code> newlines, or specify | |
| <code class="docutils literal notranslate"><span class="pre">DOS</span></code>, <code class="docutils literal notranslate"><span class="pre">WIN32</span></code>, or <code class="docutils literal notranslate"><span class="pre">CRLF</span></code> for <code class="docutils literal notranslate"><span class="pre">\r\n</span></code> newlines. | |
| This option may not be used with <code class="docutils literal notranslate"><span class="pre">COPYONLY</span></code>.</p> | |
| </dd> | |
| </dl> | |
| <section id="example"> | |
| <h2>Example<a class="headerlink" href="#example" title="Permalink to this heading">¶</a></h2> | |
| <p>Consider a source tree containing a <code class="docutils literal notranslate"><span class="pre">foo.h.in</span></code> file:</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#cmakedefine FOO_ENABLE</span> | |
| <span class="cp">#cmakedefine FOO_STRING "@FOO_STRING@"</span> | |
| </pre></div> | |
| </div> | |
| <p>An adjacent <code class="docutils literal notranslate"><span class="pre">CMakeLists.txt</span></code> may use <code class="docutils literal notranslate"><span class="pre">configure_file</span></code> to | |
| configure the header:</p> | |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">option(</span><span class="no">FOO_ENABLE</span><span class="w"> </span><span class="s">"Enable Foo"</span><span class="w"> </span><span class="no">ON</span><span class="nf">)</span> | |
| <span class="nf">if(</span><span class="no">FOO_ENABLE</span><span class="nf">)</span> | |
| <span class="w"> </span><span class="nf">set(</span><span class="no">FOO_STRING</span><span class="w"> </span><span class="s">"foo"</span><span class="nf">)</span> | |
| <span class="nf">endif()</span> | |
| <span class="nf">configure_file(</span><span class="nb">foo.h.in</span><span class="w"> </span><span class="nb">foo.h</span><span class="w"> </span><span class="no">@ONLY</span><span class="nf">)</span> | |
| </pre></div> | |
| </div> | |
| <p>This creates a <code class="docutils literal notranslate"><span class="pre">foo.h</span></code> in the build directory corresponding to | |
| this source directory. If the <code class="docutils literal notranslate"><span class="pre">FOO_ENABLE</span></code> option is on, the | |
| configured file will contain:</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define FOO_ENABLE</span> | |
| <span class="cp">#define FOO_STRING "foo"</span> | |
| </pre></div> | |
| </div> | |
| <p>Otherwise it will contain:</p> | |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cm">/* #undef FOO_ENABLE */</span> | |
| <span class="cm">/* #undef FOO_STRING */</span> | |
| </pre></div> | |
| </div> | |
| <p>One may then use the <span class="target" id="index-0-command:target_include_directories"></span><a class="reference internal" href="target_include_directories.html#command:target_include_directories" title="target_include_directories"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_include_directories()</span></code></a> command to | |
| specify the output directory as an include directory:</p> | |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">target_include_directories(</span><span class="nv"><target></span><span class="w"> </span><span class="p">[</span><span class="no">SYSTEM</span><span class="p">]</span><span class="w"> </span><span class="o"><</span><span class="no">INTERFACE</span><span class="p">|</span><span class="no">PUBLIC</span><span class="p">|</span><span class="no">PRIVATE</span><span class="o">></span><span class="w"> </span><span class="s">"${CMAKE_CURRENT_BINARY_DIR}"</span><span class="nf">)</span> | |
| </pre></div> | |
| </div> | |
| <p>so that sources may include the header as <code class="docutils literal notranslate"><span class="pre">#include</span> <span class="pre"><foo.h></span></code>.</p> | |
| </section> | |
| <section id="see-also"> | |
| <h2>See Also<a class="headerlink" href="#see-also" title="Permalink to this heading">¶</a></h2> | |
| <ul class="simple"> | |
| <li><p><span class="target" id="index-0-command:file"></span><a class="reference internal" href="file.html#generate" title="file(generate)"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">file(GENERATE)</span></code></a></p></li> | |
| </ul> | |
| </section> | |
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| <ul> | |
| <li><a class="reference internal" href="#">configure_file</a><ul> | |
| <li><a class="reference internal" href="#example">Example</a></li> | |
| <li><a class="reference internal" href="#see-also">See Also</a></li> | |
| </ul> | |
| </li> | |
| </ul> | |
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