[Haskell-cafe] Dynamically Linking Foreign Functions

Bulat Ziganshin bulat.ziganshin at gmail.com
Thu Dec 31 07:06:06 EST 2009

Hello Richard,

C/Invoke is another library whose name i forget.

> Thanks a lot.  Though the haskell wiki [0] claims that libffi works on x64.

i don't know, just read yesterday on Lua list:

> A question for Fabio: what are the issues with Alien for 64-bit Windows?

I can answer part of that. Libffi [1] (the C library on top of which
Alien is built) has no support for 64-bit windows. More specifically
there is a need for some runtime generated glue code (mainly for
callbacks), and assembler support for x64 is very poor so far (many
Visual C++ compilers come without assembler and/or lack support for
inline asm).

Python and Java (in the JNA package) have their own port of libffi
specifically for x64. However I never managed to compile any of these
two for Alien (usually because of the lack of assembler).

I tried all this about a year ago, so things may have changed since then.

[1] http://sourceware.org/libffi/

Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com

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