[Haskell-beginners] LTS is good but...

[emacstheviking]

As requested,

iMac:~ vosabristol$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.8.3

which ghc
/opt/local/bin/ghc

Hmm.... it shows a macports instsallation of GHC... but I am sure that's
how I git it... I *used* to use the OSX installation package but I thought
a clean start using MacPorts would somehow change the mood...

iMac:~ vosabristol$ cabal --version
cabal-install version 1.16.0.2
using version 1.16.0 of the Cabal library

iMac:~ vosabristol$ which cabal
/usr/bin/cabal

So... there is a possible case for *once again* performing a complete and
utter removal of Haskell and its partners in crime and doing a fresh
installation?


Out of frustration I built OCaml and OPAM from sources last night but I'd
still like to go with GHC!

:)


On 3 March 2015 at 20:43, Michael Snoyman <michael at snoyman.com> wrote:

> Funny that there's an issue being discussed in the cabal issue tracker
> right now[1] similar to this. But the report you're giving here is
> particularly strange. Cabal-1.16 implies that you're using GHC 7.6, which
> is supported by the claim that base 4.7 isn't available. I'd recommend
> starting off with running the following commands and pasting the output:
>
> ghc --version
> which ghc
> cabal --version
> which cabal
>
> [1] https://github.com/haskell/cabal/issues/2438
>
> On Tue, Mar 3, 2015 at 10:21 PM emacstheviking <objitsu at gmail.com> wrote:
>
>> Forgot to add that somehow, despite the upgrade, my cabal version has
>> gone backwards from 1.20.0.1 to 1.16.0
>>
>> WTF?
>>
>>
>> On 3 March 2015 at 20:19, emacstheviking <objitsu at gmail.com> wrote:
>>
>>> I started an OpenGL project within an LTS sandbox as guided on another
>>> post and, somewhat foolishly it would see, I did a "cabal install
>>> cabal-install" when prompted that a new version was available.
>>>
>>> The very next time I tried to work on my code.... I got this:
>>>
>>> bash-3.2$ pwd
>>> /Users/seancharles/Documents/Coding/haskell/lts1
>>> bash-3.2$ cabal build
>>> cabal: You need to re-run the 'configure' command. The version of Cabal
>>> being
>>> used has changed (was Cabal-1.20.0.1, now Cabal-1.16.0).
>>> bash-3.2$ cabal configure
>>> Resolving dependencies...
>>> Configuring lts1-0.1.0.0...
>>> cabal: At least the following dependencies are missing:
>>> base ==4.7.*
>>> bash-3.2$ cabal build
>>> cabal: You need to re-run the 'configure' command. The version of Cabal
>>> being
>>> used has changed (was Cabal-1.20.0.1, now Cabal-1.16.0).
>>> bash-3.2$ ls -l
>>> total 112
>>> -rw-r--r--  1 seancharles  staff     19 Mar  2 12:53 LICENCSE
>>> -rw-r--r--  1 seancharles  staff    552 Mar  3 20:09 Main.hs
>>> -rw-r--r--  1 seancharles  staff    477 Mar  3 20:07 Main.hs~
>>> -rw-r--r--  1 seancharles  staff     46 Mar  2 12:52 Setup.hs
>>> -rw-r--r--  1 seancharles  staff  30198 Mar  2 12:51 cabal.config
>>> -rw-r--r--  1 seancharles  staff   1090 Mar  2 12:51 cabal.sandbox.config
>>> drwxr-xr-x  5 seancharles  staff    170 Mar  2 12:53 dist
>>> -rw-r--r--  1 seancharles  staff   1932 Mar  2 12:52 lts1.cabal
>>> bash-3.2$
>>>
>>> So, welcome to a different kind of hell, "cabal version hell" perhaps?
>>>
>>> Can anybody help me get it running again?
>>> Thanks.
>>> Sean.
>>>
>>>
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