我STC单片机移植UCOSII，找到一个例子：
例子上有一段：
EXTRN IDATA (OSTCBCur)
EXTRN IDATA (OSTCBHighRdy)
EXTRN IDATA (OSRunning)
EXTRN IDATA (OSPrioCur)
EXTRN IDATA (OSPrioHighRdy)
我移植时，出错，把这段改成：
EXTRN XDATA (OSTCBCur)
EXTRN XDATA (OSTCBHighRdy)
EXTRN XDATA (OSRunning)
EXTRN XDATA (OSPrioCur)
EXTRN XDATA (OSPrioHighRdy)
还是出错，提示：
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
SYMBOL: OSTCBCUR
MODULE: OS_CPU_A.obj (OS_CPU_A)
ADDRESS: 2AB2H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
SYMBOL: OSTCBHIGHRDY
MODULE: OS_CPU_A.obj (OS_CPU_A)
ADDRESS: 2AB4H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
SYMBOL: OSPRIOCUR
MODULE: OS_CPU_A.obj (OS_CPU_A)
ADDRESS: 2AC0H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
SYMBOL: OSPRIOHIGHRDY
MODULE: OS_CPU_A.obj (OS_CPU_A)
ADDRESS: 2AC2H
Program Size: data=75.0 xdata=3433 code=11322
Target not created
请问高手，如何解决？谢谢！
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