L.S., I am trying the prerelease of GHC, version 8.2.0.20170507 I adapted wxHaskell to the new packages that come with the new GHC and it compiles now, but only the first time. If I compile it a second time, even if nothing has changed, the information from the custom-setup section of the wxc.cabal file seems to be forgotten. This section looks like this: custom-setup setup-depends: base, Cabal < 2, containers, bytestring, split, process, directory, filepath (I am using cabal-install 1.24.0.2) Output from the second time I try to install wxHaskell:
cabal install --force-reinstalls --reinstall wxdirect wxc wxcore wx [1 of 1] Compiling Main ( X:\Temp\wxHaskell\wxcore\dist\setup\setup.hs, X:\Temp\wxHaskell\wxcore\dist\setup\Main.o ) Linking X:\Temp\wxHaskell\wxcore\dist\setup\setup.exe ... [1 of 1] Compiling Main ( X:\Temp\wxHaskell\wxc\dist\setup\setup.hs, X:\Temp\wxHaskell\wxc\dist\setup\Main.o )
X:\Temp\wxHaskell\wxc\dist\setup\setup.hs:505:61: error: Variable not in scope: versionBranch :: Version -> [a0] | 505 | full_ver = (concat . intersperse "." . map show . versionBranch) ver | ^^^^^^^^^^^^^ This error message indicates that the wrong version of Cabal (2.0) is used to compile the wxcore setup.hs It looks like a cabal-install bug, but this does not happen when I use GHC 8.0.2; should I write a GHC bug ticket? Regards, Henk-Jan van Tuyl -- Folding@home What if you could share your unused computer power to help find a cure? In just 5 minutes you can join the world's biggest networked computer and get us closer sooner. Watch the video. http://foldingathome.stanford.edu/ http://Van.Tuyl.eu/ http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --