* Heinrich Apfelmus <apfel...@quantentunnel.de> [2013-03-15 10:38:37+0100] > Duncan Coutts wrote: > >Hi folks, > > > >I want to give you advance notice that I would like to make Cabal depend > >on parsec. The implication is that GHC would therefore depend on parsec > >and thus it would become a core package, rather than just a HP package. > >So this would affect both GHC and the HP, though I hope not too much. > > > >[..] > > > >Why did I choose parsec? Practicality dictates that I can only use > >things in the core libraries, and the nearest thing we have to that is > >the parser lib that is in the HP. I tried to use happy but I could not > >construct a grammar/lexer combo to handle the layout (also, happy is not > >exactly known for its great error messages). > > Reuse is good, but the implication I'm worried about is this: Can I > upgrade the parsec package installed on my system by doing a user > install from hackage ? Without an implementation of more flexible > package installations (multiple versions installed simultaneously), > any dependency of GHC has its version number essentially set into > stone.
We've had that working for a long time. Right now I even have multiple installed versions of Cabal-the-library itself. It's not that Parsec would be automatically linked into each executable. It's just that ghc-the-program would have Parsec linked into it. Roman _______________________________________________ cabal-devel mailing list cabal-devel@haskell.org http://www.haskell.org/mailman/listinfo/cabal-devel
