duncan.coutts at worc.ox.ac.uk
Fri Aug 17 08:55:56 EDT 2007
On Fri, 2007-08-17 at 11:33 +0100, Malcolm Wallace wrote:
> Duncan Coutts <duncan.coutts at worc.ox.ac.uk> wrote:
> > > Is it still possible to upgrade an older version of Cabal (e.g.
> > > supplied with ghc-6.2) to the latest version, using only the older
> > > version of Cabal itself?
> > We've never supported building with an older version of cabal, but
> > fortunately that's never necessary since it can always self-bootstrap:
> Ah, I see. That's quite clever. So any new version of Cabal will
> always depend on itself to install itself, ignoring any pre-existing
> version of Cabal. So in fact, you do not even need to have Cabal
> installed already, to get started!
Yes, in fact it's actually easier when there's no existing Cabal package
since then it "Just Works"tm to do:
runghc Setup configure
runghc Setup build
although that's a tad slow since runghc has to interpret all the source
modules rather than just Setup.lhs.
IMHO it should also work when there is already a Cabal package
registered rather than us having to specify "-i.". I've not figured out
yet if thats a ghc bug or intended behaviour.
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