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| <div class="section" id="enable-exports"> |
| <span id="prop_tgt:ENABLE_EXPORTS"></span><h1>ENABLE_EXPORTS<a class="headerlink" href="#enable-exports" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>Specify whether an executable exports symbols for loadable modules.</p> |
| <p>Normally an executable does not export any symbols because it is the |
| final program. It is possible for an executable to export symbols to |
| be used by loadable modules. When this property is set to true CMake |
| will allow other targets to "link" to the executable with the |
| <span class="target" id="index-0-command:target_link_libraries"></span><a class="reference internal" href="../command/target_link_libraries.html#command:target_link_libraries" title="target_link_libraries"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">target_link_libraries()</span></code></a> command. On all platforms a target-level |
| dependency on the executable is created for targets that link to it. |
| Handling of the executable on the link lines of the loadable modules |
| varies by platform:</p> |
| <ul class="simple"> |
| <li><p>On Windows-based systems (including Cygwin) an "import library" is |
| created along with the executable to list the exported symbols. |
| Loadable modules link to the import library to get the symbols.</p></li> |
| <li><p>On macOS, loadable modules link to the executable itself using the |
| <code class="docutils literal notranslate"><span class="pre">-bundle_loader</span></code> flag.</p></li> |
| <li><p>On AIX, a linker "import file" is created along with the executable |
| to list the exported symbols for import when linking other targets. |
| Loadable modules link to the import file to get the symbols.</p></li> |
| <li><p>On other platforms, loadable modules are simply linked without |
| referencing the executable since the dynamic loader will |
| automatically bind symbols when the module is loaded.</p></li> |
| </ul> |
| <p>This property is initialized by the value of the variable |
| <span class="target" id="index-0-variable:CMAKE_ENABLE_EXPORTS"></span><a class="reference internal" href="../variable/CMAKE_ENABLE_EXPORTS.html#variable:CMAKE_ENABLE_EXPORTS" title="CMAKE_ENABLE_EXPORTS"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_ENABLE_EXPORTS</span></code></a> if it is set when a target is created.</p> |
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