RL78_PFDL_Error

新人提问:

使用的e2 studio version: v7.8.0 

编译器CC-RL compiler version: v1.09.00

使用安装好的PFDL库,加入这些文件 后编译出现错误,发现以下函数还没定义,请问是什么问题?

E0562310:Undefined external symbol "_PFDL_Open" referenced in ".\src\r_cg_pfdl.obj"
E0562310:Undefined external symbol "_PFDL_Handler" referenced in ".\src\r_cg_pfdl.obj"
E0562310:Undefined external symbol "_PFDL_Execute" referenced in ".\src\r_cg_pfdl.obj"
E0562310:Undefined external symbol "_PFDL_Close" referenced in ".\src\r_cg_pfdl.obj"