my guess (not a windows user) is that 1 - it cannot build libraries because you don't have MSVC installed. so you would have to already have installed libclang and libclang-dev.
2 - using BinDeps debug as described at https://github.com/JuliaLang/BinDeps.jl#diagnostics would help you work out why whatever you do have installed isn't being recognised as liclang and libclang-dev. andrew
