dbg_setup
extern int dbg_setup(Ofl_desc *, const char *, int);
if (dbg_setup(ofl, optarg, 2) == 0)
(void) dbg_setup(ofl, optarg, 3);
extern int dbg_setup(const char *, Dbg_desc *);
if (dbg_setup(rpl_debug, &_dbg_desc) == 0)
(void) dbg_setup(prm_debug, &_dbg_desc);