libraries under ghc

[Simon Marlow]

On 29 October 2005 22:32, Frederik Eaton wrote:

> Is true that it is currently necessary to reinstall every
> locally-installed package when I upgrade to a new version of ghc, even
> if it is only a new patchlevel?
> 
> Maybe this should only be necessary when the major or minor version
> number changes?

It's true; see FAQ #2:

http://www.haskell.org/ghc/docs/latest/html/users_guide/faq.html

We've never addressed binary compatibility between versions.  GHC's
aggressive cross-module optimisation makes it a little tricky.  I would
like to see us do something in this direction, though.

Cheers,
	Simon