Hi Alex,
The latest version of derive is 2.4.1, which has a number of compile
fixes for newer compilers. Any package I maintain is tested on GHC
6.10.4, 6.12.3 and 7.0.1 - so this bug should not be present in 2.4.1.
Thanks, Neil
On Sun, Dec 12, 2010 at 10:07 PM, Alex
Hi all.
I am trying to install the "yi" editor using cabal-install, which in turns installs the package 'derive-2.3.0.2'. I get the following error during derive's compilation:
[53 of 58] Compiling Data.Derive.Internal.Traversal ( Data/Derive/Internal/Traversal.hs, dist/build/Data/Derive/Internal/Traversal.o )
Data/Derive/Internal/Traversal.hs:34:0: Illegal instance declaration for `Applicative (Writer w)' (All instance types must be of the form (T t1 ... tn) where T is not a synonym. Use -XTypeSynonymInstances if you want to disable this.) In the instance declaration for `Applicative (Writer w)' cabal: Error: some packages failed to install: derive-2.3.0.2 failed during the building phase. The exception was: ExitFailure 1
Of course, I tried to build it with --ghc-option=-XTypeSynonymInstances, which in turn gives another compilation error.
I am using ubuntu maverick 32-bit, with ghc-6.12.1 and cabal-install 0.8.2. The ghc was installed from the package repository. Cabal was installed using:
cabal-install cabal
Alex.
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