(target_signal_to_name): Ditto.
(target_signal_from_name): Make arg const char *.
* thread-db.c (thread_db_err_str): Make return type const char *.
- * utils.c (perror_with_name): Make arg const char *.
* infrun.c (sig_print_info): Update.
* signals/signals.c (signals): Make array and struct members const.