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

Wed Mar 4 10:45:39 UTC 2015

I am a 30+ years hacker Boris, building from source might just tempt me
still!! HAHAHA
My machine is now "clean" so I will decide how to play it!

Thanks again everybody.

On 4 March 2015 at 09:31, Boris <d12frosted at icloud.com> wrote:

> Hey,
>
> Little addition to what Michael already sent you.
>
> To get ‘the latest’ you should build from sources :D
>
> But in case it’s ok for you to have ghc 7.8.3 and you don’t want to ./configure;
> make; make install, you might also check this installation script on
> github <https://github.com/yogsototh/install-haskell>.
>
>
>
> On March 4, 2015 at 11:28:50, Michael Snoyman (michael at snoyman.com) wrote:
>
> I'd recommend looking at:
>
> http://www.stackage.org/install#mac-os-x
>  https://github.com/bitemyapp/learnhaskell/blob/master/README.md#mac-os-x
>
> I don't generally recommend using the platform installer, it ends up
> pegging libraries to old versions which causes dependency problems, or in
> some cases have known bugs.
>
> On Wed, Mar 4, 2015 at 11:26 AM emacstheviking <objitsu at gmail.com> wrote:
>
>> Agreed Michael!
>>
>> I am currently wiping all Mac Ports packages and I will perform a clean
>> up of /Library/Haskell etc.
>>
>> What is the *preferred* way to get the lastest for OSX: Using homebrew,
>> macports or the Haskell Platform. I *used* to use the platform installer
>> but for some reason (cabal I expect!) I started trying out other ways...
>>
>> I think actually I will go the platform packager again...
>>
>> On 4 March 2015 at 09:13, Michael Snoyman <michael at snoyman.com> wrote:
>>
>>> I can't really explain the details of what's going on here. It seems
>>> that in some cases different versions of the executables are being found,
>>> but I don't know why. Wiping out your sandbox (cabal sandbox delete) and
>>> starting over may be sufficient to recover.
>>>
>>> On Wed, Mar 4, 2015 at 11:11 AM emacstheviking <objitsu at gmail.com>
>>> wrote:
>>>
>>>>  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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