error in openGL

when m trying to execute ehci-0.6 m getting d errors
undefined reference gluprespective n glulookat as follows

/home/niveditha/project/ehci-0.6/samples/6dofhand.cpp:578: undefined reference to gluPerspective' 6dofhand.o: In functionReSizeGLScene(int, int)’:
/home/niveditha/project/ehci-0.6/samples/6dofhand.cpp:482: undefined reference to gluPerspective' 6dofhand.o: In functionDrawGLScene()’:
/home/niveditha/project/ehci-0.6/samples/6dofhand.cpp:436: undefined reference to `gluLookAt’
collect2: ld returned 1 exit status
make[3]: *** [6dofhand] Error 1

can u please help me…