Ganesh Sittampalam wrote:
> It seems pressure is growing for darcs 2.8 to support GHC 7.6 - a few
> people have asked about it on IRC and at least one distro has patched
> things themselves.
>
> I've pushed the patches to the 2.8 repo
> (http://darcs.net/releases/branch-2.8/). The changes aren't entirely
> trivial, but I'm reasonably confident they work.
I had a problem building the 2.8 branch with ghc-6.12.3. The build (cabal
install -f-library) chose haskeline-0.6.4.7 which fails to install with
ghc-6.12.3:
[...]
[18 of 27] Compiling System.Console.Haskeline.Backend.Terminfo (
System/Console/Haskeline/Backend/Terminfo.hs,
dist/build/System/Console/Haskeline/Backend/Terminfo.o )
System/Console/Haskeline/Backend/Terminfo.hs:200:9:
Inferred type is less polymorphic than expected
Quantified type variable `m' escapes
In the expression: Writer.tell
In the definition of `output': output = Writer.tell
cabal: Error: some packages failed to install:
darcs-2.8.3 depends on haskeline-0.6.4.7 which failed to install.
haskeline-0.6.4.7 failed during the building phase.
The build succeeds if I make this change:
franksen@aragon:~/ctl/tools/darcs/branch-2.8-issue2199 > darcs whatsnew
hunk ./darcs.cabal 630
+ if impl(ghc<7.4)
+ build-depends: haskeline <= 0.6.3.2
+
(this is in the executable section, something similar will be needed for the
library part)
haskeline-0.6.3.2 is the latest version on hackage that claims to have been
successfully built with ghc-6.12.3. I have not checked building with later
versions.
Cheers
--
Ben Franksen
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