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| <span id="policy:CMP0074"></span><h1>CMP0074<a class="headerlink" href="#cmp0074" title="Permalink to this headline">ΒΆ</a></h1> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.12.</span></p> |
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| <p><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> uses <code class="docutils literal notranslate"><span class="pre"><PackageName>_ROOT</span></code> variables.</p> |
| <p>In CMake 3.12 and above the <span class="target" id="index-1-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(<PackageName>)</span></code></a> command now |
| searches prefixes specified by the <span class="target" id="index-0-variable:<PackageName>_ROOT"></span><a class="reference internal" href="../variable/PackageName_ROOT.html#variable:<PackageName>_ROOT" title="<PackageName>_ROOT"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre"><PackageName>_ROOT</span></code></a> CMake |
| variable and the <span class="target" id="index-0-envvar:<PackageName>_ROOT"></span><a class="reference internal" href="../envvar/PackageName_ROOT.html#envvar:<PackageName>_ROOT" title="<PackageName>_ROOT"><code class="xref cmake cmake-envvar docutils literal notranslate"><span class="pre"><PackageName>_ROOT</span></code></a> environment variable. |
| Package roots are maintained as a stack so nested calls to all <code class="docutils literal notranslate"><span class="pre">find_*</span></code> |
| commands inside find modules and config packages also search the roots as |
| prefixes. This policy provides compatibility with projects that have not been |
| updated to avoid using <code class="docutils literal notranslate"><span class="pre"><PackageName>_ROOT</span></code> variables for other purposes.</p> |
| <p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior for this policy is to ignore <code class="docutils literal notranslate"><span class="pre"><PackageName>_ROOT</span></code> |
| variables. The <code class="docutils literal notranslate"><span class="pre">NEW</span></code> behavior for this policy is to use |
| <code class="docutils literal notranslate"><span class="pre"><PackageName>_ROOT</span></code> variables.</p> |
| <p>This policy was introduced in CMake version 3.12. 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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