请问CCSV7 编译时出现这种 unresolved symbols remain报错该怎么解决

报错的具体内容如下：
undefined                                           first referenced
  symbol                                              in file
---------                                              ----------------
EMIFANANDECCCalculate                ./Basic/Flash/NandFlash.obj
EMIFANANDECCCheckAndCorrect    ./Basic/Flash/NandFlash.obj
EMIFANANDECCDisable                   ./Basic/Flash/NandFlash.obj
EMIFANANDECCEnable                   ./Basic/Flash/NandFlash.obj
EMIFANANDECCInit                         ./Basic/Flash/NandFlash.obj
EMIFANANDECCReadSet                ./Basic/Flash/NandFlash.obj
EMIFANANDECCWriteSet                ./Basic/Flash/NandFlash.obj
EMIFANANDInit                               ./Basic/Flash/NandFlash.obj
EMIFANANDWaitPinStatusGet          ./Basic/Flash/NandFlash.obj
NANDBlockErase                            ./Basic/Flash/NandFlash.obj
NANDOpen                                     ./Basic/Flash/NandFlash.obj
刚接触ccs的新手被这个问题困扰了好久，上网查了各种解决unresolved symbols remain问题的方法都是添加路径，但是不知道该加哪个库的路径， ./Basic/Flash/NandFlash.obj这个文件是在Bebug文件夹下
如果不是路径添加的原因，那该怎么解决呢？谢谢！