* work for SIGSEGV and similar. It is good enough for timers, and
* maybe all deferrables. */
+#ifdef LISP_FEATURE_SB_THREAD
static void
add_handled_signals(sigset_t *sigset)
{
}
void block_signals(sigset_t *what, sigset_t *where, sigset_t *old);
+#endif
static boolean
maybe_resignal_to_lisp_thread(int signal, os_context_t *context)