On Tue, Oct 13, 2015 at 03:12:44AM -0600, stef204 wrote:
Hi,
I am learning Haskell, following various tutorials, etc.
Trying to install ghc-vis to help me better understand how Haskell works. "ghc-vis is a tool to visualize live Haskell data structures in GHCi."
And trying to follow this guide to install it, specifically as it relates to Arch: http://felsin9.de/nnis/ghc-vis/#installation
Installation fails.
I have installed haskell-gtk but am unable to find the graphviz haskell bindings haskell-graphviz. (I do have Arch's regular graphviz installed from official repos.)
The package `haskell-graphviz` is no longer in [haskell-core]. Right now I can't recall why I removed it, but most likely it was a lack of upstream updates resulting in other packages being kept back.
During 'cabal install ghc-vis --disable-library-profiling' several libraries fail with messages:
failed to install glib-0.12.5.4 Build log ( /home/($user)/Documents/hs/hswork/projects/101/.cabal-sandbox/logs/glib-0.12.5.4.log ): Failed to install cairo-0.12.5.3 Build log ( /home/($user)/Documents/hs/hswork/projects/101/.cabal-sandbox/logs/cairo-0.12.5.3.log ):
When installing `haskell-gtk` you should have gotten `haskell-glib` and `haskell-cairo` too (as well as `haskell-pango`). `cabal` ought to have picked that up.
The log files above are empty, so no help there.
I have done 'cabal install gtk2hs-buildtools' successfully but does not seem to help above errors.
You can find `gtk2hs-buildtools` in [haskell-core].
I am doing all of the above in a sandbox, which is probably not the best for ghc-vis but since I have no experience with cabal and didn't want to make errors and possibly pollute my system with difficult to track files, I figured I'd try to build in a sandbox, at first--which could be the cause of the problem?
Or possibly I should remove the official haskell-gtk and let cabal take care of this?
In general I try to avoid mixing use of [haskell-core] and `cabal`.
Would very much appreciate some feedback as to how to resolve.
Personally I'm so familiar with the tools we se for [haskell-core] that I often build proper Arch packages for everything :) I very rarely use `cabal` for anything. I've lately had a closer look at `stack` (available in [haskell-core] as `haskell-stack-bin`) and if ghc-vis produces one or more binaries (i.e. no libs that you are interested in) then it might be a good way to build it. /M -- Magnus Therning OpenPGP: 0xAB4DFBA4 email: magnus@therning.org jabber: magnus@therning.org twitter: magthe http://therning.org/magnus Finagle's Sixth Law: Don't believe in miracles -- rely on them.