How to add an external library(e.g. built by msp430-gcc) into IAR system for linkage?

Hi TI,

We are using msp430-gcc provided by TI to build a static library, which is verified under linux enviroment. And Now we hope to link it inside IAR for MSP430.

We right click the group from the project tree window in the workspace, then "Add" -> "Add Files...."  select the libary, and add successfully like many source and header.. 

But when we perform a build then, there would be a lot of "Error[e46]: Undefined external ***** referenced in ...."  and it seems that we failed to add the library de-facto.

Does IAR for MSP support to link external bullt library?  If yes, how we could?

Thanks!