[...] all opengl true type font renderers are written in C++, no one is written in C.
If I want to write haskell bindings for such a thing, what can I do?
Interfacing to C++ is hard because of the mismatch between the Haskell and C++ typesystems. There are two solutions: 1) Make your C++ interface look like COM and use H/Direct. 2) Make your C++ interface look like C (which is more or less Haskell without the type classes) and use an ffi frontend (or raw ffi). We used to do this at Yale. If doing this with Hugs, you have to be sure to link Hugs with a C++ compiler and may need to use 'export "C" { ... }' in header files and compile generated code with a C++ compiler. (The same may well be required if using H/Direct.) The first is best if you want to preserve some of the type structure present in the original code or if you want to want to/can reuse IDL bindings -- Alastair Reid alastair@reid-consulting-uk.ltd.uk Reid Consulting (UK) Limited http://www.reid-consulting-uk.ltd.uk/alastair/