Index: src/amiga-library.h
==================================================================
--- src/amiga-library.h
+++ src/amiga-library.h
@@ -25,10 +25,11 @@
 #  define OF_M68K_ARG(type, name, reg)		\
 	register type reg_##name __asm__(#reg);	\
 	type name = reg_##name;
 # endif
 
+typedef void (*of_sig_t)(int);
 struct of_libc {
 	/*
 	 * Needed by the runtime. Some of them are also used by ObjFW, but we
 	 * need all of them to pass them along to the runtime.
 	 */
@@ -68,13 +69,19 @@
 # endif
 
 	/* Needed only by ObjFW. */
 	int (*_Nonnull vsnprintf)(const char *_Nonnull restrict, size_t,
 	    const char *_Nonnull restrict, va_list);
+# ifdef OF_AMIGAOS_M68K
+	/* strtod() uses sscanf() internally */
+	int (*_Nonnull vsscanf)(const char *_Nonnull restrict,
+	    const char *_Nonnull restrict, va_list);
+# endif
 	void (*_Nonnull exit)(int);
 	char *_Nullable (*_Nonnull setlocale)(int, const char *_Nullable);
 	int (*_Nonnull _Unwind_Backtrace)(int (*_Nonnull)(void *_Nonnull,
 	    void *_Null_unspecified), void *_Null_unspecified);
+	of_sig_t _Nullable (*_Nonnull signal)(int, of_sig_t _Nullable);
 };
 
 extern bool of_init(unsigned int version, struct of_libc *libc, FILE **sF);
 #endif

Index: src/amiga-library.m
==================================================================
--- src/amiga-library.m
+++ src/amiga-library.m
@@ -524,10 +524,25 @@
     va_list args)
 {
 	return libc.vsnprintf(str, size, fmt, args);
 }
 
+#ifdef OF_AMIGAOS_M68K
+int
+sscanf(const char *restrict str, const char *restrict fmt, ...)
+{
+	int ret;
+	va_list args;
+
+	va_start(args, fmt);
+	ret = libc.vsscanf(str, fmt, args);
+	va_end(args);
+
+	return ret;
+}
+#endif
+
 void
 exit(int status)
 {
 	libc.exit(status);
 
@@ -543,10 +558,16 @@
 int
 _Unwind_Backtrace(int (*callback)(void *, void *), void *data)
 {
 	return libc._Unwind_Backtrace(callback, data);
 }
+
+of_sig_t
+signal(int sig, of_sig_t func)
+{
+	return libc.signal(sig, func);
+}
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpedantic"
 static CONST_APTR functionTable[] = {
 #ifdef OF_MORPHOS