将libmodbus移植到其他项目过程中报错无法解决。

[libai]

• libmodbus报错
  

  

• 前期移植过程按照视频进行，报错当前无法解决，请大家帮忙解决一下
  .\KeilData\RelInExFlash_Font\obj\2.axf: Error: L6822E: Symbol _sys_close has obsolete ARM/Thumb Synonym definitions (by sys_io.o and startup.o).
  .\KeilData\RelInExFlash_Font\obj\2.axf: Error: L6200E: Symbol _sys_close multiply defined (by sys_io.o and startup.o).
  .\KeilData\RelInExFlash_Font\obj\2.axf: Error: L6822E: Symbol _sys_ensure has obsolete ARM/Thumb Synonym definitions (by sys_io.o and startup.o).
  .\KeilData\RelInExFlash_Font\obj\2.axf: Error: L6200E: Symbol _sys_ensure multiply defined (by sys_io.o and startup.o).
  .\KeilData\RelInExFlash_Font\obj\2.axf: Error: L6822E: Symbol _sys_flen has obsolete ARM/Thumb Synonym definitions (by sys_io.o and startup.o).
  等