Index: src/runtime/ObjFW_RT.sfd
==================================================================
--- src/runtime/ObjFW_RT.sfd
+++ src/runtime/ObjFW_RT.sfd
@@ -2,11 +2,11 @@
 ==basetype struct Library *
 ==libname objfw_rt.library
 ==bias 30
 ==public
 * Functions for the linklib
-void objc_init(struct objc_libc *libc, FILE *stdout, FILE *stdin)(a0,a1,a2)
+bool objc_init(unsigned int version, struct objc_libc *libc, FILE *stdout, FILE *stdin)(d0,a0,a1,a2)
 * Used by the compiler - these need glue code
 void glue___objc_exec_class(void *_Nonnull module)(a0)
 IMP _Nonnull glue_objc_msg_lookup(id _Nullable obj, SEL _Nonnull sel)(a0,a1)
 IMP _Nonnull glue_objc_msg_lookup_stret(id _Nullable obj, SEL _Nonnull sel)(a0,a1)
 IMP _Nonnull glue_objc_msg_lookup_super(struct objc_super *_Nonnull super, SEL _Nonnull sel)(a0,a1)

Index: src/runtime/amiga-library.m
==================================================================
--- src/runtime/amiga-library.m
+++ src/runtime/amiga-library.m
@@ -147,10 +147,12 @@
 
 	data_size = (uintptr_t)&__data_size -
 	    ((uintptr_t)&__a4_init - DATA_OFFSET);
 
 	if ((child->data_seg = AllocMem(data_size, MEMF_ANY)) == NULL) {
+		FreeMem((char *)child - child->library.lib_NegSize,
+		    child->library.lib_NegSize + child->library.lib_PosSize);
 		base->library.lib_OpenCnt--;
 		return NULL;
 	}
 
 	memcpy(child->data_seg, base->data_seg - DATA_OFFSET, data_size);
@@ -204,12 +206,11 @@
 	OBJC_M68K_ARG(struct ObjFWRTBase *, base, REG_A6)
 
 	if (base->parent != NULL) {
 		struct ObjFWRTBase *parent;
 
-		if (base->initialized &&
-		    (size_t)_EH_FRAME_BEGINS__ == (size_t)_EH_FRAME_OBJECTS__)
+		if (base->initialized)
 			for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
 				base->libc.__deregister_frame_info(
 				    (&_EH_FRAME_BEGINS__)[i]);
 
 		parent = base->parent;
@@ -233,27 +234,32 @@
 lib_null(void)
 {
 	return 0;
 }
 
-static void __saveds
-objc_init(struct ObjFWRTBase *base OBJC_M68K_REG("a6"),
+static bool __saveds
+objc_init(unsigned int version OBJC_M68K_REG("d0"),
     struct objc_libc *libc OBJC_M68K_REG("a0"),
     FILE *stdout_ OBJC_M68K_REG("a1"), FILE *stderr_ OBJC_M68K_REG("a2"))
 {
+	register struct ObjFWRTBase *base OBJC_M68K_REG("a6");
 	uintptr_t *iter, *iter0;
+
+	if (version > 1)
+		return false;
 
 	memcpy(&base->libc, libc, sizeof(base->libc));
 
 	stdout = stdout_;
 	stderr = stderr_;
 
-	if ((size_t)_EH_FRAME_BEGINS__ == (size_t)_EH_FRAME_OBJECTS__)
-		for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
-			base->libc.__register_frame_info(
-			    (&_EH_FRAME_BEGINS__)[i],
-			    (&_EH_FRAME_OBJECTS__)[i]);
+	if ((size_t)_EH_FRAME_BEGINS__ != (size_t)_EH_FRAME_OBJECTS__)
+		return false;
+
+	for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
+		base->libc.__register_frame_info((&_EH_FRAME_BEGINS__)[i],
+		    (&_EH_FRAME_OBJECTS__)[i]);
 
 	iter0 = &__CTOR_LIST__[1];
 	for (iter = iter0; *iter != 0; iter++);
 
 	while (iter > iter0) {
@@ -260,10 +266,12 @@
 		void (*ctor)(void) = (void (*)(void))*--iter;
 		ctor();
 	}
 
 	base->initialized = true;
+
+	return true;
 }
 
 void *
 malloc(size_t size)
 {
@@ -309,15 +317,15 @@
 
 	return ret;
 }
 
 int
-fputs(const char *restrict s, FILE *restrict stream)
+fflush(FILE *restrict stream)
 {
 	register struct ObjFWRTBase *base OBJC_M68K_REG("a6");
 
-	return base->libc.fputs(s, stream);
+	return base->libc.fflush(stream);
 }
 
 void
 exit(int status)
 {

Index: src/runtime/linklib/linklib.m
==================================================================
--- src/runtime/linklib/linklib.m
+++ src/runtime/linklib/linklib.m
@@ -59,11 +59,11 @@
 		.malloc = malloc,
 		.calloc = calloc,
 		.realloc = realloc,
 		.free = free,
 		.vfprintf = vfprintf,
-		.fputs = fputs,
+		.fflush = fflush,
 		.exit = exit,
 		.abort = abort,
 		._Unwind_RaiseException = _Unwind_RaiseException,
 		._Unwind_DeleteException = _Unwind_DeleteException,
 		._Unwind_GetLanguageSpecificData =
@@ -77,11 +77,15 @@
 		._Unwind_SetGR = _Unwind_SetGR,
 		._Unwind_Resume = _Unwind_Resume,
 		.__register_frame_info = __register_frame_info,
 		.__deregister_frame_info = __deregister_frame_info,
 	};
-	objc_init(&libc, stdout, stderr);
+
+	if (!objc_init(1, &libc, stdout, stderr)) {
+		fputs("Failed to initialize objfw_rt.library!\n", stderr);
+		abort();
+	}
 
 	initialized = true;
 }
 
 OF_DESTRUCTOR()

Index: src/runtime/private.h
==================================================================
--- src/runtime/private.h
+++ src/runtime/private.h
@@ -140,11 +140,11 @@
 	void *(*malloc)(size_t);
 	void *(*calloc)(size_t, size_t);
 	void *(*realloc)(void *, size_t);
 	void (*free)(void *);
 	int (*vfprintf)(FILE *, const char *, va_list);
-	int (*fputs)(const char *, FILE *);
+	int (*fflush)(FILE *);
 	void (*exit)(int);
 	void (*abort)(void);
 	int (*_Unwind_RaiseException)(void *_Nonnull);
 	void (*_Unwind_DeleteException)(void *_Nonnull);
 	void *(*_Unwind_GetLanguageSpecificData)(void *_Nonnull);
@@ -338,9 +338,10 @@
 
 #define OBJC_ERROR(...)							\
 	{								\
 		fprintf(stderr, "[objc @ " __FILE__ ":%d] ", __LINE__);	\
 		fprintf(stderr, __VA_ARGS__);				\
-		fputs("\n", stderr);					\
+		fprintf(stderr, "\n");					\
+		fflush(stderr);						\
 		abort();						\
 		OF_UNREACHABLE						\
 	}