Re: [xmonad] GroupNavigation build error

* On Wednesday, May 12 2010, Ivan Lazar Miljenovic wrote:

Adam Vogt writes:

...

containers-0.3.0.0 should build with older GHCs. It would be much easier to manage if we could just require a newer containers: maintaining those macros is a fair amount of work. Is that allowed, or is it too great a concern that this adds one more dependency to fetch for users with older GHCs?

It isn't: Cabal is the only library that comes with GHC that you should upgrade as otherwise you get diamond dependency problems (which is why "cabal upgrade" is currently disabled).

Well supposing that xmonad-core and xmonad-contrib are built with the same containers version, and user's configs are compiled with -package (which isn't done), keeping two versions can work, though there will be issues to use say a Map produced by functions from another library (though I don't believe this happens in user configs). So maybe it could be made to work for most configs, but it looks like conditional compilation (or just sticking to the containers-0.2 subset of the api) will probably cause less trouble. -- Adam