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| <div class="section" id="objc-standard"> | |
| <span id="prop_tgt:OBJC_STANDARD"></span><h1>OBJC_STANDARD<a class="headerlink" href="#objc-standard" title="Permalink to this headline">ΒΆ</a></h1> | |
| <div class="versionadded"> | |
| <p><span class="versionmodified added">New in version 3.16.</span></p> | |
| </div> | |
| <p>The OBJC standard whose features are requested to build this target.</p> | |
| <p>This property specifies the OBJC standard whose features are requested | |
| to build this target. For some compilers, this results in adding a | |
| flag such as <code class="docutils literal notranslate"><span class="pre">-std=gnu11</span></code> to the compile line.</p> | |
| <p>Supported values are:</p> | |
| <dl class="simple"> | |
| <dt><code class="docutils literal notranslate"><span class="pre">90</span></code></dt><dd><p>Objective C89/C90</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">99</span></code></dt><dd><p>Objective C99</p> | |
| </dd> | |
| <dt><code class="docutils literal notranslate"><span class="pre">11</span></code></dt><dd><p>Objective C11</p> | |
| </dd> | |
| </dl> | |
| <p>If the value requested does not result in a compile flag being added for | |
| the compiler in use, a previous standard flag will be added instead. This | |
| means that using:</p> | |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">set_property(</span><span class="no">TARGET</span><span class="w"> </span><span class="nb">tgt</span><span class="w"> </span><span class="no">PROPERTY</span><span class="w"> </span><span class="no">OBJC_STANDARD</span><span class="w"> </span><span class="m">11</span><span class="nf">)</span><span class="w"></span> | |
| </pre></div> | |
| </div> | |
| <p>with a compiler which does not support <code class="docutils literal notranslate"><span class="pre">-std=gnu11</span></code> or an equivalent | |
| flag will not result in an error or warning, but will instead add the | |
| <code class="docutils literal notranslate"><span class="pre">-std=gnu99</span></code> or <code class="docutils literal notranslate"><span class="pre">-std=gnu90</span></code> flag if supported. This "decay" behavior may | |
| be controlled with the <span class="target" id="index-0-prop_tgt:OBJC_STANDARD_REQUIRED"></span><a class="reference internal" href="OBJC_STANDARD_REQUIRED.html#prop_tgt:OBJC_STANDARD_REQUIRED" title="OBJC_STANDARD_REQUIRED"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">OBJC_STANDARD_REQUIRED</span></code></a> target property. | |
| Additionally, the <span class="target" id="index-0-prop_tgt:OBJC_EXTENSIONS"></span><a class="reference internal" href="OBJC_EXTENSIONS.html#prop_tgt:OBJC_EXTENSIONS" title="OBJC_EXTENSIONS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">OBJC_EXTENSIONS</span></code></a> target property may be used to | |
| control whether compiler-specific extensions are enabled on a per-target basis.</p> | |
| <p>If the property is not set, and the project has set the <span class="target" id="index-0-prop_tgt:C_STANDARD"></span><a class="reference internal" href="C_STANDARD.html#prop_tgt:C_STANDARD" title="C_STANDARD"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">C_STANDARD</span></code></a>, | |
| the value of <span class="target" id="index-1-prop_tgt:C_STANDARD"></span><a class="reference internal" href="C_STANDARD.html#prop_tgt:C_STANDARD" title="C_STANDARD"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">C_STANDARD</span></code></a> is set for <span class="target" id="index-0-prop_tgt:OBJC_STANDARD"></span><a class="reference internal" href="#prop_tgt:OBJC_STANDARD" title="OBJC_STANDARD"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">OBJC_STANDARD</span></code></a>.</p> | |
| <p>See the <span class="target" id="index-0-manual:cmake-compile-features(7)"></span><a class="reference internal" href="../manual/cmake-compile-features.7.html#manual:cmake-compile-features(7)" title="cmake-compile-features(7)"><code class="xref cmake cmake-manual docutils literal notranslate"><span class="pre">cmake-compile-features(7)</span></code></a> manual for information on | |
| compile features and a list of supported compilers.</p> | |
| <p>This property is initialized by the value of | |
| the <span class="target" id="index-0-variable:CMAKE_OBJC_STANDARD"></span><a class="reference internal" href="../variable/CMAKE_OBJC_STANDARD.html#variable:CMAKE_OBJC_STANDARD" title="CMAKE_OBJC_STANDARD"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_OBJC_STANDARD</span></code></a> variable if it is set when a target | |
| is created.</p> | |
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