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| <div class="section" id="cmake-ninja-output-path-prefix"> |
| <span id="variable:CMAKE_NINJA_OUTPUT_PATH_PREFIX"></span><h1>CMAKE_NINJA_OUTPUT_PATH_PREFIX<a class="headerlink" href="#cmake-ninja-output-path-prefix" title="Permalink to this headline">ΒΆ</a></h1> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.6.</span></p> |
| </div> |
| <p>Set output files path prefix for the <span class="target" id="index-0-generator:Ninja"></span><a class="reference internal" href="../generator/Ninja.html#generator:Ninja" title="Ninja"><code class="xref cmake cmake-generator docutils literal notranslate"><span class="pre">Ninja</span></code></a> generator.</p> |
| <p>Every output files listed in the generated <code class="docutils literal notranslate"><span class="pre">build.ninja</span></code> will be |
| prefixed by the contents of this variable (a trailing slash is |
| appended if missing). This is useful when the generated ninja file is |
| meant to be embedded as a <code class="docutils literal notranslate"><span class="pre">subninja</span></code> file into a <em>super</em> ninja |
| project. For example, a ninja build file generated with a command |
| like:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>cd top-build-dir/sub && |
| cmake -G Ninja -DCMAKE_NINJA_OUTPUT_PATH_PREFIX=sub/ path/to/source |
| </pre></div> |
| </div> |
| <p>can be embedded in <code class="docutils literal notranslate"><span class="pre">top-build-dir/build.ninja</span></code> with a directive like |
| this:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>subninja sub/build.ninja |
| </pre></div> |
| </div> |
| <p>The <code class="docutils literal notranslate"><span class="pre">auto-regeneration</span></code> rule in <code class="docutils literal notranslate"><span class="pre">top-build-dir/build.ninja</span></code> must have an |
| order-only dependency on <code class="docutils literal notranslate"><span class="pre">sub/build.ninja</span></code>.</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>When <code class="docutils literal notranslate"><span class="pre">CMAKE_NINJA_OUTPUT_PATH_PREFIX</span></code> is set, the project generated |
| by CMake cannot be used as a standalone project. No default targets |
| are specified.</p> |
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