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| <div class="section" id="windows-export-all-symbols"> |
| <span id="prop_tgt:WINDOWS_EXPORT_ALL_SYMBOLS"></span><h1>WINDOWS_EXPORT_ALL_SYMBOLS<a class="headerlink" href="#windows-export-all-symbols" title="Permalink to this headline">ΒΆ</a></h1> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.4.</span></p> |
| </div> |
| <p>This property is implemented only for MS-compatible tools on Windows.</p> |
| <p>Enable this boolean property to automatically create a module definition |
| (<code class="docutils literal notranslate"><span class="pre">.def</span></code>) file with all global symbols found in the input <code class="docutils literal notranslate"><span class="pre">.obj</span></code> files |
| for a <code class="docutils literal notranslate"><span class="pre">SHARED</span></code> library (or executable with <span class="target" id="index-0-prop_tgt:ENABLE_EXPORTS"></span><a class="reference internal" href="ENABLE_EXPORTS.html#prop_tgt:ENABLE_EXPORTS" title="ENABLE_EXPORTS"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">ENABLE_EXPORTS</span></code></a>) |
| on Windows. The module definition file will be passed to the linker |
| causing all symbols to be exported from the <code class="docutils literal notranslate"><span class="pre">.dll</span></code>. |
| For global <em>data</em> symbols, <code class="docutils literal notranslate"><span class="pre">__declspec(dllimport)</span></code> must still be used when |
| compiling against the code in the <code class="docutils literal notranslate"><span class="pre">.dll</span></code>. All other function symbols will |
| be automatically exported and imported by callers. This simplifies porting |
| projects to Windows by reducing the need for explicit <code class="docutils literal notranslate"><span class="pre">dllexport</span></code> markup, |
| even in <code class="docutils literal notranslate"><span class="pre">C++</span></code> classes.</p> |
| <p>When this property is enabled, zero or more <code class="docutils literal notranslate"><span class="pre">.def</span></code> files may also be |
| specified as source files of the target. The exports named by these files |
| will be merged with those detected from the object files to generate a |
| single module definition file to be passed to the linker. This can be |
| used to export symbols from a <code class="docutils literal notranslate"><span class="pre">.dll</span></code> that are not in any of its object |
| files but are added by the linker from dependencies (e.g. <code class="docutils literal notranslate"><span class="pre">msvcrt.lib</span></code>).</p> |
| <p>This property is initialized by the value of |
| the <span class="target" id="index-0-variable:CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS"></span><a class="reference internal" href="../variable/CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS.html#variable:CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS" title="CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS</span></code></a> variable if it is set |
| when a target is created.</p> |
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