val rc_ok                              : int
val rc_usage                           : int
val rc_failure                         : int
val rc_invalid_argument                : int
val rc_system_error                    : int
val rc_hygiene                         : int
val rc_circularity                     : int
val rc_solver_failed                   : int
val rc_ocamldep_error                  : int
val rc_lexing_error                    : int
val rc_build_error                     : int
val rc_executor_subcommand_failed      : int
val rc_executor_subcommand_got_signal  : int
val rc_executor_io_error               : int
val rc_executor_excetptional_condition : int