Currently released cabal-install on hackage doesn't know how to do linkery for ghc head afaik, but I could be wrong
On Sat, Sep 27, 2014 at 12:26 PM, Reid Barton <rwbar...@gmail.com> wrote: > On Fri, Aug 8, 2014 at 8:00 AM, Edward Z. Yang <ezy...@mit.edu> wrote: > >> Hey all, >> >> SPJ pointed out to me today that if you try to run: >> >> cabal install --with-ghc=/path/to/inplace/bin/ghc-stage2 >> >> with the latest GHC HEAD, this probably will not actually work, because >> your system installed version of Cabal is probably too old to deal with >> the new package key stuff in HEAD. So, how do you get a version >> of cabal-install (and Cabal) which is new enough to do what you need >> it to? >> >> The trick is to compile Cabal using your /old/ GHC. Step-by-step, this >> involves cd'ing into libraries/Cabal/Cabal and running `cabal install` >> (or install it in a sandbox, if you like) and then cd'ing to >> libraries/Cabal/cabal-install and cabal install'ing that. >> > > Hi all, > > The new cabal-install I built last month following the instructions above > started failing with recent GHC HEAD with messages like > > ghc: ghc no longer supports single-file style package databases > (dist/package.conf.inplace) use 'ghc-pkg init' to create the database with > the correct format. > > I found that repeating these steps with the latest libraries/Cabal > submodule gave me a cabal-install that, so far, appears to be working with > GHC HEAD. So if your cabal-install has stopped working with HEAD, try > building the latest version as outlined in Edward's email. > > Cabal wizards, any gotchas with current Cabal & GHC HEAD I should be aware > of? > > Regards, > Reid Barton > > _______________________________________________ > ghc-devs mailing list > ghc-d...@haskell.org > http://www.haskell.org/mailman/listinfo/ghc-devs > >
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