On Sat, 2008-01-19 at 10:47 -0500, Steve Lihn wrote: > Hi, > It appears some of the latest hackages are moving towards 6.8 to take > advantage of the new features, while quite a few remains at 6.6. The > compatibility between the two versions has been problematic. I only > have 6.6 installed, but now thinking to add 6.8 to my account (so I > can switch between them, depending what works where).
It should all work. I've got 3 ghc versions installed. > What is the best practice to make 6.8 co-exist with 6.6 ? Specific > questions are: > 1) I installed 6.6 under prefix=$HOME/ghc. If I install 6.8 to the > same prefix, it will overwrite 6.6. Correct? How do I get around it? That could be ok. Check what the layout if $HOME/ghc is. If it looks like: bin/ lib/ lib/ghc-6.6/ then that's fine and you'll be able to install another ghc to the same prefix, since the sub-dirs are versioned. You'll end up with $HOME/bin/ghc being the latest ghc, and the older version available as $HOME/ghc/bin/ghc-6.6. > 2) I installed additional tools and packages under $HOME/htools using > 6.6. (Which I begin to wonder if that is necessary.) Do I have to use > a different directory for 6.8? I noticed that, for each package, the > path is $HOME/htools/lib/<package-ver>/ghc-6.6.1/ etc etc. It seems > that 6.8 will create subdirectories, so they can co-exist peacefully. > Correct? Yes. The aim is to be able to have multiple haskell implementations, multiple versions of each haskell implementations and multiple versions of each library built for any/all haskell implementation/version and to have them all co-exist peacefully. Duncan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
