求助编译后出现的 问题？

zxcv12345

Clean: Deleting intermediary and output files.
Clean: Deleted file "C:\LQ1\4\pic17.obj".
Clean: Deleted file "C:\LQ1\4\pic17.cce".
Clean: Done.
Executing: "C:\HT-PIC\bin\picc.exe" -C -E"pic17.cce" "pic17.C" -O"pic17.obj" -Zg9 -O -ASMLIST -Q -MPLAB -16F630
Warning[000] C:\LQ1\4\pic17.C 115 : implicit return at end of non-void function
Warning[000] C:\LQ1\4\pic17.C 177 : implicit return at end of non-void function
Executing: "C:\HT-PIC\bin\picc.exe" -E"RR.lde" "C:\LQ1\4\pic17.obj" -M"RR.map" -O"RR.cof" -O"RR.hex" -Q -MPLAB -16F630
Error[000]   : undefined symbols:
Error[000]   : _CSR0 (C:\LQ1\4\pic17.obj)
Error[000]   : _CSR1 (C:\LQ1\4\pic17.obj)
Error[000]   : _CSR2 (C:\LQ1\4\pic17.obj)
Error[000]   : _qk_cnt (C:\LQ1\4\pic17.obj)
Error[000]   : _recieve (C:\LQ1\4\pic17.obj)
BUILD FAILED: Thu Apr 08 10:04:55 2010
我的源文件里根本就没有_CSR0 、_recieve 、 _qk_cnt这些字符，可编译后说出错。是什么原因