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| <div class="section" id="compile-options"> |
| <span id="prop_tgt:COMPILE_OPTIONS"></span><h1>COMPILE_OPTIONS<a class="headerlink" href="#compile-options" title="Permalink to this headline">¶</a></h1> |
| <p>List of options to pass to the compiler.</p> |
| <p>This property holds a <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">semicolon-separated list</span></a> |
| of options specified so far for its target. Use the |
| <span class="target" id="index-0-command:target_compile_options"></span><a class="reference internal" href="../command/target_compile_options.html#command:target_compile_options" title="target_compile_options"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_compile_options()</span></code></a> command to append more options. |
| The options will be added after after flags in the |
| <span class="target" id="index-0-variable:CMAKE_<LANG>_FLAGS"></span><a class="reference internal" href="../variable/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> and <span class="target" id="index-0-variable:CMAKE_<LANG>_FLAGS_<CONFIG>"></span><a class="reference internal" href="../variable/CMAKE_LANG_FLAGS_CONFIG.html#variable:CMAKE_<LANG>_FLAGS_<CONFIG>" title="CMAKE_<LANG>_FLAGS_<CONFIG>"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_<LANG>_FLAGS_<CONFIG></span></code></a> |
| variables, but before those propagated from dependencies by the |
| <span class="target" id="index-0-prop_tgt:INTERFACE_COMPILE_OPTIONS"></span><a class="reference internal" href="INTERFACE_COMPILE_OPTIONS.html#prop_tgt:INTERFACE_COMPILE_OPTIONS" title="INTERFACE_COMPILE_OPTIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">INTERFACE_COMPILE_OPTIONS</span></code></a> property.</p> |
| <p>This property is initialized by the <span class="target" id="index-0-prop_dir:COMPILE_OPTIONS"></span><a class="reference internal" href="../prop_dir/COMPILE_OPTIONS.html#prop_dir:COMPILE_OPTIONS" title="COMPILE_OPTIONS"><code class="xref cmake cmake-prop_dir docutils literal notranslate"><span class="pre">COMPILE_OPTIONS</span></code></a> directory |
| property when a target is created, and is used by the generators to set |
| the options for the compiler.</p> |
| <p>Contents of <code class="docutils literal notranslate"><span class="pre">COMPILE_OPTIONS</span></code> may use "generator expressions" with the |
| syntax <code class="docutils literal notranslate"><span class="pre">$<...></span></code>. See the <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> manual |
| for available expressions. See the <span class="target" id="index-0-manual:cmake-buildsystem(7)"></span><a class="reference internal" href="../manual/cmake-buildsystem.7.html#manual:cmake-buildsystem(7)" title="cmake-buildsystem(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-buildsystem(7)</span></code></a> manual |
| for more on defining buildsystem properties.</p> |
| <div class="section" id="option-de-duplication"> |
| <h2>Option De-duplication<a class="headerlink" href="#option-de-duplication" title="Permalink to this headline">¶</a></h2> |
| <p>The final set of options used for a target is constructed by |
| accumulating options from the current target and the usage requirements of |
| its dependencies. The set of options is de-duplicated to avoid repetition.</p> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.12: </span>While beneficial for individual options, the de-duplication step can break |
| up option groups. For example, <code class="docutils literal notranslate"><span class="pre">-option</span> <span class="pre">A</span> <span class="pre">-option</span> <span class="pre">B</span></code> becomes |
| <code class="docutils literal notranslate"><span class="pre">-option</span> <span class="pre">A</span> <span class="pre">B</span></code>. One may specify a group of options using shell-like |
| quoting along with a <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix. The <code class="docutils literal notranslate"><span class="pre">SHELL:</span></code> prefix is dropped, |
| and the rest of the option string is parsed using the |
| <span class="target" id="index-0-command:separate_arguments"></span><a class="reference internal" href="../command/separate_arguments.html#command:separate_arguments" title="separate_arguments"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">separate_arguments()</span></code></a> <code class="docutils literal notranslate"><span class="pre">UNIX_COMMAND</span></code> mode. For example, |
| <code class="docutils literal notranslate"><span class="pre">"SHELL:-option</span> <span class="pre">A"</span> <span class="pre">"SHELL:-option</span> <span class="pre">B"</span></code> becomes <code class="docutils literal notranslate"><span class="pre">-option</span> <span class="pre">A</span> <span class="pre">-option</span> <span class="pre">B</span></code>.</p> |
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| <li><a class="reference internal" href="#">COMPILE_OPTIONS</a><ul> |
| <li><a class="reference internal" href="#option-de-duplication">Option De-duplication</a></li> |
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