#define GHC_PKG_VERSION 6.2.2
-- hackery to convice cpp to splice GHC_PKG_VERSION into a string
version :: String
version = tail "\ 
    \ GHC_PKG_VERSION"

version2 = "GHC_PKG_VERSION"

#define v3 "GHC_PKG_VERSION"
version3 = v3

#define stringify(s) #s
version4 = stringify(GHC_PKG_VERSION)

#define stringify2(s) "s"
version5 = stringify2(GHC_PKG_VERSION)