Working-ish plugin thingy

src/lib.rs

@@ -0,0 +1,20 @@
+pub trait Plugin {
+    fn init(&mut self);
+}
+
+#[macro_export]
+macro_rules! export_plugin {
+    ($plugin_type:ty) => {
+        static mut PLUGIN: Option<$plugin_type> = None;
+
+        #[no_mangle]
+        pub extern "C" fn init() {
+            unsafe {
+                PLUGIN = Some(<$plugin_type>::default());
+                if let Some(plugin) = PLUGIN.as_mut() {
+                    plugin.init();
+                }
+            }
+        }
+    };
+}