Index: src/runtime/Makefile
==================================================================
--- src/runtime/Makefile
+++ src/runtime/Makefile
@@ -1,11 +1,12 @@
 include ../../extra.mk
 
 STATIC_PIC_LIB_NOINST = ${RUNTIME_LIB_A}
 STATIC_LIB_NOINST = ${RUNTIME_A}
 
-SRCS = category.m		\
+SRCS = arc.m			\
+       category.m		\
        class.m			\
        exception.m		\
        hashtable.m		\
        init.m			\
        lookup.m			\

ADDED   src/runtime/arc.m
Index: src/runtime/arc.m
==================================================================
--- src/runtime/arc.m
+++ src/runtime/arc.m
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012
+ *   Jonathan Schleifer <js@webkeks.org>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include "config.h"
+
+#import "runtime.h"
+
+#import "OFObject.h"
+#import "OFBlock.h"
+
+id
+objc_retain(id object)
+{
+	return [object retain];
+}
+
+id
+objc_retainBlock(id block)
+{
+	return (id)_Block_copy(block);
+}
+
+id
+objc_retainAutorelease(id object)
+{
+	return [[object retain] autorelease];
+}
+
+void
+objc_release(id object)
+{
+	[object release];
+}
+
+id
+objc_autoreleaseReturnValue(id object)
+{
+	return objc_autorelease(object);
+}
+
+id
+objc_retainAutoreleaseReturnValue(id object)
+{
+	return objc_autoreleaseReturnValue(objc_retain(object));
+}
+
+id
+objc_retainAutoreleasedReturnValue(id object)
+{
+	return objc_retain(object);
+}
+
+id
+objc_storeStrong(id *object, id value)
+{
+	id old = *object;
+	*object = objc_retain(value);
+	objc_release(old);
+
+	return value;
+}