你好，我是一个DSP新手，正尝试运行一些案例时遇到一点困难，已经该网站TMDSLCDK6748 开发套件 | TI.com.cn安装了CCS_v9和最新版的ti-processor-sdk-rtos-omapl138-lcdk-06.03.00.106-Windows-x86-Install.exe，均安装在默认路径。
当我对工程右键进行build project时，报出以下错误，请问专业人士这些错误代表什么意思，该如何去解决？谢谢。
undefined first referenced
symbol in file
--------- ----------------
GPIOBank6Pin12PinMuxSetup ./gpioCardDetect.obj
GPIODirModeSet ./gpioCardDetect.obj
GPIOPinWrite ./gpioCardDetect.obj
PSCModuleControl ./gpioCardDetect.obj
error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "led2.out" not built
>> Compilation failure
makefile:149: recipe for target 'led2.out' failed
gmake[1]: *** [led2.out] Error 1
makefile:145: recipe for target 'all' failed
gmake: *** [all] Error 2
**** Build Finished ****
