extern boolean handle_control_stack_guard_triggered(os_context_t *,void *);
extern boolean interrupt_maybe_gc(int, siginfo_t*, void*);
#ifdef LISP_FEATURE_SB_THREAD
-extern void handle_rt_signal(int, siginfo_t*, void*);
+extern void interrupt_thread_handler(int, siginfo_t*, void*);
extern void sig_stop_for_gc_handler(int, siginfo_t*, void*);
+extern void thread_exit_handler(int, siginfo_t*, void*);
#endif
extern void undoably_install_low_level_interrupt_handler (int signal,
void