Joachim Breitner wrote: > module dependencies: Data.List.Utils > package dependencies: ghc-prim integer base array-0.2.0.0 > containers-0.2.0.1 bytestring-0.9.1.4 mtl-1.1.0.2 > regex-base-0.93.1 > regex-posix-0.93.2 regex-compat-0.92 > [..] > > Now, the version of missingh in the archive until a few days ago was > built against regex-compat (on which it does depend properly) when that > was built against regex-posix-0.93.1. regex-posix-0.93.2 was then > uploaded, and regex-compat had a binNMU to be installable again. Despite > having the same upstream version, it’s ABI did change, breaking packages > that depend on regex-compat.
This is one of the problems I ran into but I didn't manage to figure out what the real issue was. > The proper solution is, I guess, what I proposed a long while ago and > which is done by the ocaml team: Use virtual packages that reflect the > ABI hash (see above) to guarantee that packages work iff their > dependencies are installed. Definitely the right way to go. > Now, according to http://hackage.haskell.org/trac/ghc/wiki/Status/Oct09, > ghc6-6.12 will provide us with a ABI hash on the package level. I can > probably afford to wait for that, and fix problems manually until then. > We really should make sure we switch to such a system with the package > recompilations for ghc6-6.12! Any chance we could get a 6.12 in experimental so we can experiment with things like this ABI hash? > Any objections? None at all. I think its a great idea. > Anyone willing to step up as the main > driver for this issue (i.e. implementing it in haskell-devscripts in > time)? Whats involved? It might help if you can map out whats required. > We can probably borrow ideas and code from the OCAML team. I have a read of the paper you linked to recently from the Ocaml team. Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
