请大家看看这个错误，谢谢

sundat

freeradius起动时提示的！！没有起动成功

[root@radius sbin]# ./radiusd -x
Starting - reading configuration files ...
Using deprecated naslist file.  Support for this will go away soon.
Module: Loaded exec
rlm_exec: Wait=yes but no output defined. Did you mean output=none?
Module: Instantiated exec (exec)
Module: Loaded expr
Module: Instantiated expr (expr)
Module: Loaded PAP
Module: Instantiated pap (pap)
Module: Loaded CHAP
Module: Instantiated chap (chap)
Module: Loaded MS-CHAP
Module: Instantiated mschap (mschap)
Module: Loaded System
Module: Instantiated unix (unix)
Module: Loaded SQL
rlm_sql (sql): Could not link driver rlm_sql_mysql: file not found
rlm_sql (sql): Make sure it (and all its dependent libraries!) are in the search path of your system's ld.
radiusd.conf[14]: sql: Module instantiation failed.
radiusd.conf[1881] Unknown module "sql".
radiusd.conf[1840] Failed to parse authenticate section.
[root@radius sbin]#