extern union interrupt_handler interrupt_handlers[NSIG];
/* Set all deferrable signals into *s. */
-void sigaddset_deferrable(sigset_t *s);
+extern void sigaddset_deferrable(sigset_t *s);
/* Set all blockable signals into *s. */
-void sigaddset_blockable(sigset_t *s);
+extern void sigaddset_blockable(sigset_t *s);
extern void block_blockable_signals();