diff --git a/SignatureDump.java b/SignatureDump.java
new file mode 100644
index 00000000..aadce2fa
--- /dev/null
+++ b/SignatureDump.java
@@ -0,0 +1,109 @@
+import java.lang.reflect.*;
+
+public final class SignatureDump {
+	public final static void main(String[] args) {
+		String class_name = args[0];
+		try {
+			Class clazz = Class.forName(class_name);
+			Method[] methods = clazz.getDeclaredMethods();
+			System.out.println("\tJavaMethodAndExtFunction functions[] = {");
+			for (int i = 0; i < methods.length; i++) {
+				Method method = methods[i];
+				int modifiers = method.getModifiers();
+				if (!Modifier.isNative(modifiers))
+					continue;
+				System.out.print("\t\t");
+				System.out.print("{\"");
+				System.out.print(method.getName());
+				System.out.print("\", \"");
+				System.out.print(getMethodSignature(method));
+				System.out.print("\", (void*)&");
+				System.out.print(getMethodMangled(class_name, method));
+				System.out.print(", ");
+				String gl_name = getExtFunctionName(method);
+				if (gl_name != null) {
+					System.out.print("\"");
+					System.out.print(gl_name);
+					System.out.print("\"");
+				} else
+					System.out.print("NULL");
+				System.out.print(", ");
+				if (gl_name != null) {
+					System.out.print("(void**)&");
+					System.out.print(gl_name);
+				} else
+					System.out.print("NULL");
+				System.out.print("}");
+                                if (i != methods.length - 1)
+					System.out.print(",");
+				System.out.println();
+			}
+			System.out.print("\t};");
+			System.out.println();
+			System.out.println("\tint num_functions = NUMFUNCTIONS(functions);");
+			System.out.print("\tjclass clazz = ext_ResetClass(env, \"");
+			String class_name_mangled = clazz.getName().replaceAll("\\.", "/");
+			System.out.print(class_name_mangled);
+			System.out.println("\");");
+			System.out.println("\tif (extgl_Extensions.)");
+			System.out.println("\t\text_InitializeClass(env, clazz, ext_set, <ext_name>, num_functions, functions);");
+		} catch (ClassNotFoundException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	private final static String getExtFunctionName(Method method) {
+		String name = method.getName();
+		if (name.charAt(0) == 'n')
+			name = name.substring(1);
+		if (name.endsWith("VBO"))
+			return null;
+		return name;
+	}
+
+	private final static String getMethodMangled(String class_name, Method method) {
+                class_name = class_name.replaceAll("\\.", "_");
+		String mangled = "Java_" + class_name + "_" + method.getName();
+                return mangled;
+	}
+
+	private final static String getMethodSignature(Method method) {
+		Class[] arg_types = method.getParameterTypes();
+		String signature = "(";
+		for (int i = 0; i < arg_types.length; i++)
+			signature += getTypeSignature(arg_types[i]);
+		Class return_type = method.getReturnType();
+		signature += ")";
+		signature += getTypeSignature(return_type);
+		return signature;
+	}
+
+	private final static String getTypeSignature(Class type) {
+		if (type.equals(Boolean.class))
+			return "Z";
+		else if (type.equals(int.class))
+			return "I";
+		else if (type.equals(float.class))
+			return "F";
+		else if (type.equals(short.class))
+			return "S";
+		else if (type.equals(double.class))
+			return "D";
+		else if (type.equals(boolean.class))
+			return "Z";
+		else if (type.equals(byte.class))
+			return "B";
+		else if (type.equals(void.class))
+			return "V";
+		else if (type.equals(char.class))
+			throw new RuntimeException();
+		else if (type.equals(long.class))
+			throw new RuntimeException();
+		else if (type.isArray())
+			throw new RuntimeException();
+		else {
+			String type_name = type.getName().replaceAll("\\.", "/");
+			return "L" + type_name + ";";
+		}
+	}
+}
diff --git a/src/native/linux/org_lwjgl_input_Cursor.cpp b/src/native/linux/org_lwjgl_input_Cursor.cpp
index 2d127f42..115bb4b7 100644
--- a/src/native/linux/org_lwjgl_input_Cursor.cpp
+++ b/src/native/linux/org_lwjgl_input_Cursor.cpp
@@ -75,7 +75,7 @@ JNIEXPORT jlong JNICALL Java_org_lwjgl_input_Cursor_nCreateCursor
 	}
 	Cursor cursor = XcursorImagesLoadCursor(disp, cursor_images);
 	XcursorImagesDestroy(cursor_images);
-	return cursor;
+	return (jlong)cursor;
 }
 
 /*