CCS 5.1 build project error

Hi,everyone.

I creat empty project with CCS5.1 .File-New -Ccs project.

the include option is

C:\ti is where I install the CCS5.1

and in the main.c file ,the code is

#include <c6x.h>

#include <stdio.h>

#include <ti/csl/csl_chip.h>

void main(void) {

 uint32_t coreID = CSL_chipReadReg (CSL_CHIP_DNUM);

 return;
}

but there is a error when i build the project.

undefined       first referenced
  symbol             in file    
 ---------       ----------------
 CSL_chipReadReg ./main.obj    

error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "lk.out" not built

why?Do i need to configure the C6000 Linker in the bulid setting?