Index: src/amiga-library.h
==================================================================
--- src/amiga-library.h
+++ src/amiga-library.h
@@ -16,11 +16,11 @@
  */
 
 #import "macros.h"
 
 #if defined(OF_COMPILING_AMIGA_LIBRARY) || defined(OF_COMPILING_AMIGA_LINKLIB)
-# if defined(__MORPHOS__)
+# ifdef OF_MORPHOS
 #  include <ppcinline/macros.h>
 #  define OF_M68K_ARG(type, name, reg) type name = (type)REG_##reg;
 # else
 #  define OF_M68K_ARG(type, name, reg)		\
 	register type reg_##name __asm__(#reg);	\
@@ -58,14 +58,16 @@
 # ifdef HAVE_SJLJ_EXCEPTIONS
 	void (*_Nonnull _Unwind_SjLj_Resume)(void *_Nonnull);
 # else
 	void (*_Nonnull _Unwind_Resume)(void *_Nonnull);
 # endif
+# ifdef OF_AMIGAOS_M68K
 	void (*_Nonnull __register_frame_info)(const void *_Nonnull,
 	    void *_Nonnull);
 	void *_Nullable (*_Nonnull __deregister_frame_info)(
 	    const void *_Nonnull);
+# endif
 
 	/* Needed only by ObjFW. */
 	int (*_Nonnull vsnprintf)(const char *_Nonnull restrict, size_t,
 	    const char *_Nonnull restrict, va_list);
 	void (*_Nonnull exit)(int);

Index: src/amiga-library.m
==================================================================
--- src/amiga-library.m
+++ src/amiga-library.m
@@ -58,10 +58,12 @@
 
 #ifdef OF_AMIGAOS_M68K
 extern uintptr_t __CTOR_LIST__[];
 extern const void *_EH_FRAME_BEGINS__;
 extern void *_EH_FRAME_OBJECTS__;
+extern void __register_frame_info(const void *, void *);
+extern void *__deregister_frame_info(const void *);
 #endif
 
 extern bool glue_of_init(void);
 
 #ifdef OF_AMIGAOS_M68K
@@ -287,11 +289,11 @@
 		struct ObjFWBase *parent;
 
 #ifdef OF_AMIGAOS_M68K
 		if (base->initialized)
 			for (size_t i = 1; i <= (size_t)_EH_FRAME_BEGINS__; i++)
-				libc.__deregister_frame_info(
+				__deregister_frame_info(
 				    (&_EH_FRAME_BEGINS__)[i]);
 #endif
 
 		parent = base->parent;
 
@@ -338,11 +340,11 @@
 #ifdef OF_AMIGAOS_M68K
 	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++)
-		libc.__register_frame_info((&_EH_FRAME_BEGINS__)[i],
+		__register_frame_info((&_EH_FRAME_BEGINS__)[i],
 		    (&_EH_FRAME_OBJECTS__)[i]);
 
 	iter0 = &__CTOR_LIST__[1];
 #elif defined(OF_MORPHOS)
 	__asm__ (
@@ -398,10 +400,16 @@
 	ret = libc.vfprintf(stream, fmt, args);
 	va_end(args);
 
 	return ret;
 }
+
+int
+vfprintf(FILE *restrict stream, const char *restrict fmt, va_list args)
+{
+	return libc.vfprintf(stream, fmt, args);
+}
 
 int
 fflush(FILE *restrict stream)
 {
 	return libc.fflush(stream);
@@ -494,10 +502,24 @@
 _Unwind_Resume(void *ex)
 {
 	libc._Unwind_Resume(ex);
 }
 #endif
+
+#ifdef OF_AMIGAOS_M68K
+void
+__register_frame_info(const void *begin, void *object)
+{
+	libc.__register_frame_info(begin, object);
+}
+
+void
+*__deregister_frame_info(const void *begin)
+{
+	return libc.__deregister_frame_info(begin);
+}
+#endif
 
 int
 vsnprintf(char *restrict str, size_t size, const char *restrict fmt,
     va_list args)
 {

Index: src/runtime/linklib/linklib.m
==================================================================
--- src/runtime/linklib/linklib.m
+++ src/runtime/linklib/linklib.m
@@ -55,12 +55,14 @@
 #ifdef HAVE_SJLJ_EXCEPTIONS
 extern void _Unwind_SjLj_Resume(void *);
 #else
 extern void _Unwind_Resume(void *);
 #endif
+#ifdef OF_AMIGAOS_M68K
 extern void __register_frame_info(const void *, void *);
 extern void *__deregister_frame_info(const void *);
+#endif
 
 struct Library *ObjFWRTBase;
 void *__objc_class_name_Protocol;
 
 static void __attribute__((__used__))
@@ -93,25 +95,28 @@
 #ifdef HAVE_SJLJ_EXCEPTIONS
 		._Unwind_SjLj_Resume = _Unwind_SjLj_Resume,
 #else
 		._Unwind_Resume = _Unwind_Resume,
 #endif
+#ifdef OF_AMIGAOS_M68K
 		.__register_frame_info = __register_frame_info,
 		.__deregister_frame_info = __deregister_frame_info,
+#endif
 	};
 
 	if (initialized)
 		return;
 
 	if ((ObjFWRTBase = OpenLibrary(OBJFWRT_AMIGA_LIB,
 	    OBJFWRT_LIB_MINOR)) == NULL) {
-		fputs("Failed to open " OBJFWRT_AMIGA_LIB "!\n", stderr);
+		fprintf(stderr, "Failed to open %s!\n", OBJFWRT_AMIGA_LIB);
 		abort();
 	}
 
 	if (!glue_objc_init(1, &libc, __sF)) {
-		fputs("Failed to initialize " OBJFWRT_AMIGA_LIB "!\n", stderr);
+		fprintf(stderr, "Failed to initialize %s!\n",
+		    OBJFWRT_AMIGA_LIB);
 		abort();
 	}
 
 	initialized = true;
 }

Index: src/runtime/private.h
==================================================================
--- src/runtime/private.h
+++ src/runtime/private.h
@@ -247,19 +247,21 @@
 # ifdef HAVE_SJLJ_EXCEPTIONS
 	void (*_Nonnull _Unwind_SjLj_Resume)(void *_Nonnull);
 # else
 	void (*_Nonnull _Unwind_Resume)(void *_Nonnull);
 # endif
+# if defined(__amigaos__) && !defined(__MORPHOS__)
 	void (*_Nonnull __register_frame_info)(const void *_Nonnull,
 	    void *_Nonnull);
 	void *_Nullable (*_Nonnull __deregister_frame_info)(
 	    const void *_Nonnull);
+# endif
 };
 #endif
 
 #ifdef OBJC_COMPILING_AMIGA_LIBRARY
-# if defined(__MORPHOS__)
+# ifdef __MORPHOS__
 #  include <ppcinline/macros.h>
 #  define OBJC_M68K_ARG(type, name, reg) type name = (type)REG_##reg;
 # else
 #  define OBJC_M68K_ARG(type, name, reg)	\
 	register type reg_##name __asm__(#reg);	\