hsc2hs and HsFFI.h

[Claus Reinke]

> Q: is the information that --print-libdir returns available programmatically
> to Haskell code?

    $ ghc --print-libdir
    C:\ghc\ghc-6.11.20090118

    $ ghc -e GHC.Paths.libdir
    "C:\\ghc\\ghc-6.11.20090118"

    $ ghc -e ':browse GHC.Paths'
    docdir :: FilePath
    ghc :: FilePath
    ghc_pkg :: FilePath
    libdir :: FilePath

    $ ghc-pkg find-module GHC.Paths
    c:/ghc/ghc-6.11.20090118\package.conf:
        ghc-paths-0.1.0.5

Claus