Hi, While adopting my older program to the newer (GHC 6.6) infrastructure, I came across the issue: OS-dependent functions like exeExtension are missing in the newer version of the FilePath package. I checked with Neil who currently maintains FilePath, and he agreed with me on this idea. I am proposing to add the following to the System.Info module (which seems to be the best place to collect OS-specific things) - the code was found in Distribution.Compat.FilePath and slightly modified (#if directive) in the same way as the current System.FilePath distinguishes between Posix and Windows interfaces: ------------------------------- begin -------------------------------------- -- | Extension for executable files -- (typically @\"\"@ on Unix and @\"exe\"@ on Windows or OS\/2) exeExtension :: String #if defined(mingw32_HOST_OS) || defined(__MINGW32__) exeExtension = "exe" #else exeExtension = "" #endif -- | Extension for object files. For GHC and NHC the extension is @\"o\"@. -- Hugs uses either @\"o\"@ or @\"obj\"@ depending on the used C compiler. objExtension :: String objExtension = "o" -- | Extension for dynamically linked (or shared) libraries -- (typically @\"so\"@ on Unix and @\"dll\"@ on Windows) dllExtension :: String #if defined(mingw32_HOST_OS) || defined(__MINGW32__) dllExtension = "dll" #else dllExtension = "so" #endif ------------------------------- end -------------------------------------- Thanks -- Dimitry Golubovsky Anywhere on the Web