extern SCM scm_handle_by_proc_catching_all SCM_P ((void *, SCM, SCM));
extern SCM scm_handle_by_message SCM_P ((void *, SCM, SCM));
extern SCM scm_handle_by_message_noexit SCM_P ((void *, SCM, SCM));
+extern SCM scm_handle_by_throw SCM_P ((void *, SCM, SCM));
extern int scm_exit_status SCM_P ((SCM args));
extern SCM scm_catch SCM_P ((SCM tag, SCM thunk, SCM handler));