Hi Paul, I'm also trying to compile boost for WM6 ARMV4I with STLPort 5.2.1. I'm stuck still in the STLPort part. What steps did you follow to build STLPort 5.2.1 and then boost? I'm stuck in things like this for example: The configure --help of stlport states for evc9: (*) For these compilers the target processor is determined automatically. You must run the WCE*.BAT file you wish to build STLport for before running configure. But there isn't any WCE*.bat file in stlport zip. Do you (or anyone else) remember what steps did you follow to build? Thanks! -- Daniel Angel Muñoz Trejo