I've followed the steps here; however, it doesn't replace or supercede an older version of ghci from my Ubuntu 18.04:
12:47:02:~$ which ghci /opt/ghc/8.0.2/bin/ghci 12:47:14:~$ ghci --version The Glorious Glasgow Haskell Compilation System, version 8.0.2 I've tried various removes, but to no avail. The newer version is on my system: 12:50:32:/usr/local/haskell/ghc-8.4.2-x86_64/bin$ ./ghci --version The Glorious Glasgow Haskell Compilation System, version 8.4.2 But I don't know what to do about this old "default" version. LB _______________________________________________ Beginners mailing list [hidden email] http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners |
Hello Lawrence,
On Mon, May 14, 2018 at 12:52:01PM -0400, Lawrence Bottorff wrote: > I've tried various removes, but to no avail. The newer version is on my > system: There should be no need of removing the old version. > 12:50:32:/usr/local/haskell/ghc-8.4.2-x86_64/bin$ ./ghci --version > The Glorious Glasgow Haskell Compilation System, version 8.4.2 What does `echo $PATH` say? -F _______________________________________________ Beginners mailing list [hidden email] http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners |
PATH does indeed have /opt/ghc/8.0.2/bin which is no doubt why my command line call gets version 8.0.2. But since I didn't put it there (I didn't add it in my .bashrc; some older Haskell setup did?), I don't know how to get it out. Also, I need to use Haskell in Emacs org-mode which tends not to go by the $PATH in a Ubuntu GUI environment. So I've installed Emacs haskell-mode (latest from melpa, I believe.) I start it up -- and it gives me this: The next big Haskell project is about to start! If I break, you can: 1. Restart: M-x haskell-process-restart 2. Configure logging: C-h v haskell-process-log (useful for debugging) 3. General config: M-x customize-mode 4. Hide these tips: C-h v haskell-process-show-debug-tips Changed directory: /home/hercynian/Programs/Haskell/ λ> . . . but this doesn't tell me what version. Is there a Haskell REPL command to find out what version? On Mon, May 14, 2018 at 1:57 PM Francesco Ariis <[hidden email]> wrote: Hello Lawrence, _______________________________________________ Beginners mailing list [hidden email] http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners |
On Mon, May 14, 2018 at 04:14:40PM -0400, Lawrence Bottorff wrote:
> Is there a Haskell REPL command to find out what version? Type :t (<>) inside the repl, if it gives an error you are still inside 8.0.2. _______________________________________________ Beginners mailing list [hidden email] http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners |
λ> :t (<>) (<>) :: Semigroup a => a -> a -> a I'm curious what this is. I'm guessing it's something that later versions can do? On Mon, May 14, 2018 at 4:31 PM Francesco Ariis <[hidden email]> wrote: On Mon, May 14, 2018 at 04:14:40PM -0400, Lawrence Bottorff wrote: _______________________________________________ Beginners mailing list [hidden email] http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners |
On Mon, May 14, 2018 at 06:17:33PM -0400, Lawrence Bottorff wrote:
> λ> :t (<>) > (<>) :: Semigroup a => a -> a -> a > > I'm curious what this is. I'm guessing it's something that later versions > can do? Yes, since GHC 8.4 the operator `<>` is part of the Prelude. Congrats on 8.4.2 working! _______________________________________________ Beginners mailing list [hidden email] http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners |
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