[Haskell-cafe] Building static libraries with -fPIC

Hello all, I'm trying to build a shared (.so) library written in Haskell with "foreign export"s, which is statically linked with all needed dependencies. To do this, as far as I understood, I need to build all my dependencies (I use Cabal) with -fPIC flag, and also somehow get RTS static library built with -fPIC. Two questions regarding to this: 1) How can I add a build flag which will be added while building all my dependencies in Cabal. 2) How can I get needed RTS library. 3) How can I deal with "base"? Can I just build it with Cabal, so this question reduces to (1)? Thanks, Nikolay.