求告知编译错误

*** ERROR L120: CONTENT BELONGS TO ERRONEOUS SEGMENT
    SEGMENT: ?C?LIB_CODE
    MODULE:  C:\KEIL\C51\LIB\C51L.LIB (?C?CLDOPTR)
*** ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
    SYMBOL:  ?C?IMUL
    SEGMENT: ?C?LIB_CODE
*** ERROR L120: CONTENT BELONGS TO ERRONEOUS SEGMENT
    SEGMENT: ?C?LIB_CODE
    MODULE:  C:\KEIL\C51\LIB\C51L.LIB (?C?IMUL)
*** ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
    SYMBOL:  ?C?IILDX
    SEGMENT: ?C?LIB_CODE
*** ERROR L120: CONTENT BELONGS TO ERRONEOUS SEGMENT
    SEGMENT: ?C?LIB_CODE
    MODULE:  C:\KEIL\C51\LIB\C51L.LIB (?C?IILDX)
*** ERROR L105: PUBLIC REFERS TO IGNORED SEGMENT
    SYMBOL:  ?C?OFFXADD
    SEGMENT: ?C?LIB_CODE
*** ERROR L120: CONTENT BELONGS TO ERRONEOUS SEGMENT
    SEGMENT: ?C?LIB_CODE
    MODULE:  C:\KEIL\C51\LIB\C51L.LIB (?C?OFFXADD)
Program Size: data=9.0 xdata=81 code=69511


这和错误代表什么？求高手告知

程序已出  code=69511 /1024  =67.88K    C51 最大可用空间也就63.5K