Fortunately, GHC can build shared libraries on some platforms, which makes it fairly easy to expose Haskell functions to C: - Using the FFI one can specify for

Fortunately, GHC can build shared libraries on some platforms, which makes it fairly easy to expose Haskell functions to C: - Using the FFI one can specify foreign exports. - The runtime and garbage collector can be initialized/deinitialized by adding an object file that uses gcc's constructor/destructor attributes. - Multiple calls to hs_init (one for each library) are allowed, as long as they are balanced by hs_exits. - It's ok to have multiple root modules.