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May 2001

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Hugs FFI : HugsAPIx in GreenCard.h and output .c files
by Kakihara Norihiro 23 May '01

23 May '01

------------------------------------- Environments: [Platform] Windows 98 [Haskell Interpreter] Hugs98 (February 2001; Windows Installer) [C Compiler] lcc-win32 (Version 3.1) ------------------------------------- Trying to use FFI on Hugs98, I prepared two files; `_test.c' and `test.hs'. -------------------------------------- [_test.c] #include <windows.h> BOOL WINAPI LibMain( HINSTANCE hDLL, DWORD Reason, LPVOID Reserved){ return TRUE; } int __declspec(dllexport) incr(int a){ return a + 1; } [test.hs] module Test(incr) where foreign import "Test" "incr" incr :: Int -> Int -------------------------------------- And I invoked Hugs such and got an output file `Test.c'. hugs +G Test.hs Because the header file `GreenCard.h', I got from Green Card 2.01, declared not HugsAPI3 but HugsAPI2, I compiled two .c files into `Test.dll' AFTER REPLACING `HugsAPI3' INTO `HugsAPI2'. Then I load `Test.hs' again. hugs Test.hs But I got such an error: Unable to load GreenCard primitives Because of the difference of the versions of headers? Provided that, where could I get the appropriate version of the GreenCard header file? Thank you for your reading... Yours respectfully, Kakihara N. mailto:YIU04646@nifty.com

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