The Haskell 98 Foreign Function Interface 1.0:
An Addendum to the Haskell 98 Report

The Haskell 98 Foreign Function Interface (FFI) adds support for invoking code written in other programming languages from Haskell and vice versa. The FFI is designed as a non-intrusive extension to the Haskell 98 standard. Version 1.0 focuses on interaction with C code, but the basic framework can also be used for interfacing to languages other than C.

Version 1.0 of the FFI Addendum is available in the following forms:

• HTML: browse or download ffi.html.tar.gz
• PostScript: ffi.ps.gz
• PDF: ffi.pdf
• Source: ffi.tar.gz
  [Needs LaTeX and BibTeX to build, and also tex4ht to build HTML.]
• The source is also available via public CVS

System Compliance Status:

• GHC conforms to the standard.
• NHC98 conforms to large parts of the standard; see the release notes for details.
• Hugs conforms to the standard.

Haskell FFI Resources:

• FFI mailing list: archive & info