plugin-interface: use extern "C" for plugin init function

plugins/apitracing/src/lib/ApiTracing.cpp

@@ -99,10 +99,10 @@ namespace ApiTracing
     }
 }
 
-std::unique_ptr<IPlugin>
-VmiCore::Plugin::init(PluginInterface* pluginInterface,
-                      std::shared_ptr<IPluginConfig> config, // NOLINT(performance-unnecessary-value-param)
-                      std::vector<std::string> args)
+extern "C" std::unique_ptr<IPlugin> VmiCore::Plugin::vmicore_plugin_init(
+    PluginInterface* pluginInterface,
+    std::shared_ptr<IPluginConfig> config, // NOLINT(performance-unnecessary-value-param)
+    std::vector<std::string> args)
 {
     return std::make_unique<ApiTracing::ApiTracing>(pluginInterface, *config, args);
 }

plugins/inmemoryscanner/src/lib/InMemory.cpp

@@ -66,10 +66,10 @@ namespace InMemoryScanner
     }
 }
 
-std::unique_ptr<IPlugin>
-VmiCore::Plugin::init(PluginInterface* pluginInterface,
-                      std::shared_ptr<IPluginConfig> config, // NOLINT(performance-unnecessary-value-param)
-                      std::vector<std::string> args)
+extern "C" std::unique_ptr<IPlugin> VmiCore::Plugin::vmicore_plugin_init(
+    PluginInterface* pluginInterface,
+    std::shared_ptr<IPluginConfig> config, // NOLINT(performance-unnecessary-value-param)
+    std::vector<std::string> args)
 {
     return std::make_unique<InMemoryScanner::InMemory>(pluginInterface, *config, args);
 }

plugins/template/src/lib/Template.cpp

@@ -51,12 +51,13 @@ namespace Template
     }
 }
 
-// This is the init function. It is called by VmiCore and is responsible for creating an instance of a plugin.
+// This is the init function. It is linked and called dynamically at runtime by
+// VmiCore and is responsible for creating an instance of a plugin.
 // All plugins have to inherit from IPlugin.
-std::unique_ptr<IPlugin>
-VmiCore::Plugin::init(PluginInterface* pluginInterface,
-                      std::shared_ptr<IPluginConfig> config, // NOLINT(performance-unnecessary-value-param)
-                      std::vector<std::string> args)
+extern "C" std::unique_ptr<IPlugin> VmiCore::Plugin::vmicore_plugin_init(
+    PluginInterface* pluginInterface,
+    std::shared_ptr<IPluginConfig> config, // NOLINT(performance-unnecessary-value-param)
+    std::vector<std::string> args)
 {
     return std::make_unique<Template::Template>(pluginInterface, *config, args);
 }

vmicore/src/include/vmicore/plugins/IPlugin.h

@@ -44,8 +44,9 @@ namespace VmiCore::Plugin
      * @param args Commandline arguments passed to this specific plugin. Elements are whitespace separated.
      * @return An instance of the plugin. Has to implement the IPlugin interface. Lifetime will be managed by VMICore.
      */
-    extern std::unique_ptr<IPlugin>
-    init(PluginInterface* pluginInterface, std::shared_ptr<IPluginConfig> config, std::vector<std::string> args);
+    extern "C" std::unique_ptr<IPlugin> vmicore_plugin_init(PluginInterface* pluginInterface,
+                                                            std::shared_ptr<IPluginConfig> config,
+                                                            std::vector<std::string> args);
 }
 
 #endif // APITRACING_IPLUGIN_H

vmicore/src/lib/plugins/PluginSystem.cpp

@@ -161,10 +161,8 @@ namespace VmiCore
                                               Plugin::PluginInterface::API_VERSION));
         }
 
-        auto pluginInitFunction = std::bit_cast<decltype(Plugin::init)*>(
-            dlsym(libraryHandle,
-                  "_ZN7VmiCore6Plugin4initEPNS0_15PluginInterfaceENSt3__110shared_ptrINS0_13IPluginConfigEEENS3_"
-                  "6vectorINS3_12basic_stringIcNS3_11char_traitsIcEENS3_9allocatorIcEEEENSB_ISD_EEEE"));
+        auto pluginInitFunction =
+            std::bit_cast<decltype(Plugin::vmicore_plugin_init)*>(dlsym(libraryHandle, PLUGIN_INIT_FUNCTION.data()));
         dlErrorMessage = dlerror();
         if (dlErrorMessage != nullptr)
         {

vmicore/src/lib/plugins/PluginSystem.h

@@ -17,6 +17,8 @@
 
 namespace VmiCore
 {
+    constexpr std::string_view PLUGIN_INIT_FUNCTION = "vmicore_plugin_init";
+
     class IPluginSystem : public Plugin::PluginInterface
     {
       public: