I installed strawberry-perl-5.8.8-alpha-2.exe, and Bit-Vector-6.4 builds and installs cleanly for me. ('cc1.exe' is not in my path.)

I don't know what accounts for the difference that you and I are seeing. (Do you ?) Perhaps someone a little closer to the development of Strawbewrry Perl can provide an understanding.

Cheers,
Rob