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

[Boris]

Hey,

Check your $PATH variable. It looks like the macports installation directory has precedence over /user/local/bin/.

But you also might want to remove the old version installed via macports.

~ d12frosted


On March 4, 2015 at 11:11:05, 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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