I have tried to use FFI on Windows with GHC/HDirect, but the compiled program won't have run: incr.exe: fatal error: resumeThread: thread not found This is my sources and traces. I don't know why such an error has occured (thread, why?). How I force this program to find the thread? (I have made sure `Hello' program can have been compiled normally...) -- SOURCES ------------------------------------- [incr.c] BOOL WINAPI DllMain(args...) { return TRUE; } int __declspec(dllexport) incr(int x) { return x + 1; } [incr.idl] module Incr { [pure]int incr([in]int); } [Main.hs] module Main(main) where main = print (incr 2) -- TRACES --------------------------------------- gcc -mno-cygwin -shared -o incr.dll incr.c -Wl,--out-implib,incr.a ihc incr.idl ghc -fglasgow-exts -package lang -c incr.hs # manually replace `incr@4' into `incr@\NUL\NUL'... # (probably it should be done with .def file :o) ghc -fglasgow-exts -c main.hs ghc -fglasgow-exts -i. -o incr.exe incr.o main.o incr.a -- ENVIRONMENT ----------------------------------- OS : Windows 98 GHC Version : 4.08.2 (Windows InstallShield) with sh.exe in ash-200010425 HDirect Version : 0.60 (Windows InstallShield)