在OMAPL138上跑led Build时出错

在OMAP-l138上运行LED的程序时出现4个错误提示：

1    #10010 errors encountered during linking; "led.out" not built led C/C++ Problem

2    <a href="file:/E:/DSP/CCS5/ccsv5/tools/compiler/dmed/HTML/10234.html">#10234-D</a> unresolved symbols remain led C/C++ Problem

3    unresolved symbol GPIODirModeSet, first referenced in ./main.obj led C/C++ Problem

4    unresolved symbol GPIOPinWrite, first referenced in ./main.obj led C/C++ Problem

不胜感激！