FFI, safe vs unsafe

[Neil Mitchell]

Hi

> - we've been told here that concurrency is just a library
No, its not. The interface to concurrency is just a library, but
internally certain things in the runtime have to change.

> - FFI allows other Haskell' implementations to import that library
If all Haskell' prime implementations depend on "GHC the library",
then do we really have many Haskell' prime implementations, or just a
pile of wrappers around GHC?

Thanks

Neil