Description        Resource        Path        Location        Type
unresolved symbol Tx_FIFO_IndexW, first referenced in ./targetConfigs/UART_FIFO.obj        Copy of Copy of y                         C/C++ Problem

Description        Resource        Path        Location        Type
unresolved symbol Tx_FIFO_IndexR, first referenced in ./targetConfigs/UART_FIFO.obj        Copy of Copy of y                         C/C++ Problem


Description        Resource        Path        Location        Type
#10234-D unresolved symbols remain        Copy of Copy of y                         C/C++ Problem


Description        Resource        Path        Location        Type
#10010 errors encountered during linking; "Copy of Copy of y.out" not built        Copy of Copy of y                         C/C++ Problem


这是怎么回事   ？？？

另外？在grace里面调用库函数也会出现类似的情况   求大神解答      急救   在单片机上投入太多时间了