Index: src/runtime/Makefile
==================================================================
--- src/runtime/Makefile
+++ src/runtime/Makefile
@@ -31,14 +31,14 @@
        sparsearray.m		\
        static-instances.m	\
        synchronized.m		\
        tagged-pointer.m		\
        ${USE_SRCS_THREADS}
-SRCS_THREADS = threading.m	\
-	       ../mutex.m	\
-	       ../once.m	\
-	       ../tlskey.m
+SRCS_THREADS = mutex.m		\
+	       once.m		\
+	       threading.m	\
+	       tlskey.m
 INCLUDES = ObjFWRT.h
 includesubdir = ObjFWRT
 
 OBJS_EXTRA = ${LOOKUP_ASM_LOOKUP_ASM_A}
 LIB_OBJS_EXTRA = ${LOOKUP_ASM_LOOKUP_ASM_LIB_A}

ADDED   src/runtime/mutex.m
Index: src/runtime/mutex.m
==================================================================
--- src/runtime/mutex.m
+++ src/runtime/mutex.m
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
+ *               2018, 2019, 2020
+ *   Jonathan Schleifer <js@nil.im>
+ *
+ * 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 "ObjFWRT.h"
+#import "private.h"
+
+#include "../mutex.m"

ADDED   src/runtime/once.m
Index: src/runtime/once.m
==================================================================
--- src/runtime/once.m
+++ src/runtime/once.m
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
+ *               2018, 2019, 2020
+ *   Jonathan Schleifer <js@nil.im>
+ *
+ * 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 "ObjFWRT.h"
+#import "private.h"
+
+#include "../once.m"

ADDED   src/runtime/tlskey.m
Index: src/runtime/tlskey.m
==================================================================
--- src/runtime/tlskey.m
+++ src/runtime/tlskey.m
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
+ *               2018, 2019, 2020
+ *   Jonathan Schleifer <js@nil.im>
+ *
+ * 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 "ObjFWRT.h"
+#import "private.h"
+
+#include "../tlskey.m"