Cyril Schmidt wrote:

Brian Hulley wrote:

...

Thanks. The only problem is that dlltool doesn't work because I don't have cygwin installed.

dlltool usually comes with the Windows distribution of GHC (at least GHC 6.4 and 6.4.1 have it; check gcc-lib directory).

Thanks - I wonder why they didn't put all the binaries in the bin directory? Anyway, I've added gcc-lib to my path and deleted the version of dlltool.exe that I downloaded, but for some reason it won't link. I used the following commands (as per your post): C++ file adapted from default generated by VS DLL project: TestDLL.cpp: // TestDLL.cpp : Defines the entry point for the DLL application. // #include "stdafx.h" BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ) { return TRUE; } int __stdcall cfun(int x){ return x * 3; } I built this with VS, then wrote a def file: TestDLL.def: LIBRARY TestDLL EXPORTS cfun Then I generated the lib using: dlltool -d TestDLL.def -l libTestDLL.a Then I wrote a Haskell program Main.hs: module Main where import GHC.Exts foreign import ccall cfun :: Int# -> Int# main = do let a = cfun 10# putStrLn $ show $ I# a and compiled with ghc -fglasgow-exts --make Main.hs -optl-lTestDLL -optl-L but I now get an error message: Linking ... c:\ghc\ghc-6.4\gcc-lib\ld.exe: cannot find -lTestDLL Any ideas? Thanks, Brian.