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| <div class="section" id="cmp0037"> |
| <span id="policy:CMP0037"></span><h1>CMP0037<a class="headerlink" href="#cmp0037" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>Target names should not be reserved and should match a validity pattern.</p> |
| <p>CMake 2.8.12 and lower allowed creating targets using <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>, |
| <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> and <span class="target" id="index-0-command:add_custom_target"></span><a class="reference internal" href="../command/add_custom_target.html#command:add_custom_target" title="add_custom_target"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">add_custom_target()</span></code></a> with unrestricted |
| choice for the target name. Newer cmake features such |
| as <span class="target" id="index-0-manual:cmake-generator-expressions(7)"></span><a class="reference internal" href="../manual/cmake-generator-expressions.7.html#manual:cmake-generator-expressions(7)" title="cmake-generator-expressions(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-generator-expressions(7)</span></code></a> and some |
| diagnostics expect target names to match a restricted pattern.</p> |
| <p>Target names may contain upper and lower case letters, numbers, the underscore |
| character (<code class="docutils literal notranslate"><span class="pre">_</span></code>), dot(<code class="docutils literal notranslate"><span class="pre">.</span></code>), plus(<code class="docutils literal notranslate"><span class="pre">+</span></code>) and minus(<code class="docutils literal notranslate"><span class="pre">-</span></code>). |
| As a special case, <code class="docutils literal notranslate"><span class="pre">ALIAS</span></code> and <code class="docutils literal notranslate"><span class="pre">IMPORTED</span></code> targets may contain |
| two consecutive colons.</p> |
| <p>Target names reserved by one or more CMake generators are not allowed. |
| Among others these include <code class="docutils literal notranslate"><span class="pre">all</span></code>, <code class="docutils literal notranslate"><span class="pre">clean</span></code>, <code class="docutils literal notranslate"><span class="pre">help</span></code>, and <code class="docutils literal notranslate"><span class="pre">install</span></code>.</p> |
| <p>Target names associated with optional features, such as <code class="docutils literal notranslate"><span class="pre">test</span></code> and |
| <code class="docutils literal notranslate"><span class="pre">package</span></code>, may also be reserved. CMake 3.10 and below always reserve them. |
| CMake 3.11 and above reserve them only when the corresponding feature is |
| enabled (e.g. by including the <span class="target" id="index-0-module:CTest"></span><a class="reference internal" href="../module/CTest.html#module:CTest" title="CTest"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">CTest</span></code></a> or <span class="target" id="index-0-module:CPack"></span><a class="reference internal" href="../module/CPack.html#module:CPack" title="CPack"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">CPack</span></code></a> modules).</p> |
| <p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior for this policy is to allow creating targets with |
| reserved names or which do not match the validity pattern. |
| The <code class="docutils literal notranslate"><span class="pre">NEW</span></code> behavior for this policy is to report an error |
| if an add_* command is used with an invalid target name.</p> |
| <p>This policy was introduced in CMake version 3.0. CMake version |
| 3.23.1 warns when the policy is not set and uses <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior. Use |
| the <span class="target" id="index-0-command:cmake_policy"></span><a class="reference internal" href="../command/cmake_policy.html#command:cmake_policy" title="cmake_policy"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">cmake_policy()</span></code></a> command to set it to <code class="docutils literal notranslate"><span class="pre">OLD</span></code> or <code class="docutils literal notranslate"><span class="pre">NEW</span></code> explicitly.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior of a policy is |
| <span class="target" id="index-0-manual:cmake-policies(7)"></span><a class="reference internal" href="../manual/cmake-policies.7.html#manual:cmake-policies(7)" title="cmake-policies(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">deprecated</span> <span class="pre">by</span> <span class="pre">definition</span></code></a> |
| and may be removed in a future version of CMake.</p> |
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