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| <div class="section" id="cmake-try-compile-platform-variables"> |
| <span id="variable:CMAKE_TRY_COMPILE_PLATFORM_VARIABLES"></span><h1>CMAKE_TRY_COMPILE_PLATFORM_VARIABLES<a class="headerlink" href="#cmake-try-compile-platform-variables" 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>List of variables that the <span class="target" id="index-0-command:try_compile"></span><a class="reference internal" href="../command/try_compile.html#command:try_compile" title="try_compile"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">try_compile()</span></code></a> command source file signature |
| must propagate into the test project in order to target the same platform as |
| the host project.</p> |
| <p>This variable should not be set by project code. It is meant to be set by |
| CMake's platform information modules for the current toolchain, or by a |
| toolchain file when used with <span class="target" id="index-0-variable:CMAKE_TOOLCHAIN_FILE"></span><a class="reference internal" href="CMAKE_TOOLCHAIN_FILE.html#variable:CMAKE_TOOLCHAIN_FILE" title="CMAKE_TOOLCHAIN_FILE"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_TOOLCHAIN_FILE</span></code></a>.</p> |
| <p>Variables meaningful to CMake, such as <span class="target" id="index-0-variable:CMAKE_<LANG>_FLAGS"></span><a class="reference internal" href="CMAKE_LANG_FLAGS.html#variable:CMAKE_<LANG>_FLAGS" title="CMAKE_<LANG>_FLAGS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_<LANG>_FLAGS</span></code></a>, are |
| propagated automatically. The <code class="docutils literal notranslate"><span class="pre">CMAKE_TRY_COMPILE_PLATFORM_VARIABLES</span></code> |
| variable may be set to pass custom variables meaningful to a toolchain file. |
| For example, a toolchain file may contain:</p> |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">set(</span><span class="no">CMAKE_SYSTEM_NAME</span><span class="w"> </span><span class="p">...</span><span class="nf">)</span><span class="w"></span> |
| <span class="nf">set(</span><span class="no">CMAKE_TRY_COMPILE_PLATFORM_VARIABLES</span><span class="w"> </span><span class="no">MY_CUSTOM_VARIABLE</span><span class="nf">)</span><span class="w"></span> |
| <span class="c"># ... use MY_CUSTOM_VARIABLE ...</span> |
| </pre></div> |
| </div> |
| <p>If a user passes <code class="docutils literal notranslate"><span class="pre">-DMY_CUSTOM_VARIABLE=SomeValue</span></code> to CMake then this |
| setting will be made visible to the toolchain file both for the main |
| project and for test projects generated by the <span class="target" id="index-1-command:try_compile"></span><a class="reference internal" href="../command/try_compile.html#command:try_compile" title="try_compile"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">try_compile()</span></code></a> |
| command source file signature.</p> |
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