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| <div class="section" id="cmp0115"> |
| <span id="policy:CMP0115"></span><h1>CMP0115<a class="headerlink" href="#cmp0115" title="Permalink to this headline">ΒΆ</a></h1> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.20.</span></p> |
| </div> |
| <p>Source file extensions must be explicit.</p> |
| <p>In CMake 3.19 and below, if a source file could not be found by the name |
| specified, it would append a list of known extensions to the name to see if |
| the file with the extension could be found. For example, this would allow the |
| user to run:</p> |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">add_executable(</span><span class="nb">exe</span><span class="w"> </span><span class="nb">main</span><span class="nf">)</span><span class="w"></span> |
| </pre></div> |
| </div> |
| <p>and put <code class="docutils literal notranslate"><span class="pre">main.c</span></code> in the executable without specifying the extension.</p> |
| <p>Starting in CMake 3.20, CMake prefers all source files to have their extensions |
| explicitly listed:</p> |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">add_executable(</span><span class="nb">exe</span><span class="w"> </span><span class="nb">main.c</span><span class="nf">)</span><span class="w"></span> |
| </pre></div> |
| </div> |
| <p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior for this policy is to implicitly append known extensions |
| to source files if they can't be found. The <code class="docutils literal notranslate"><span class="pre">NEW</span></code> behavior of this policy is |
| to not append known extensions and require them to be explicit.</p> |
| <p>This policy was introduced in CMake version 3.20. 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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