C674x MathLib problem

All,I have a probem about C674x MathLib.

I add header and link lib as user mannul said.

When I use sinsp_v function and build,the error occurs

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

error: unresolved symbols remain

But my sinsp function works fine.

I also found that all the xxxxx_v function can't run.

Thanks for your reply