Haskellコンパイラを入れる
どうやらHaskellのコンパイラとしてはGHCがメジャーということらしい。もろもろライブラリも使いたいのでHaskell Platformを入れるのがよいそうで。自宅はMacで、パッケージ管理はHomebrewを使っている。
$ brew install haskell-platform Warning: haskell-platform-2013.2.0.0 already installed
ああ、前に分けもわからず入れたんだった。ということでHomebrewの更新もやってしまおう。
$ brew update Cloning into '/usr/local/Library/Taps/homebrew-dupes'... : ==> Deleted Formulae : catdoc haskell-platform mpio texmacs :
あれ?もう一度インストールを試すと
$ brew install haskell-platform Error: No available formula for haskell-platform We no longer package haskell-platform. Consider installing ghc and cabal-install instead: brew install ghc cabal-install :
どうも"haskell-platform"という名前ではパッケージをインストールできなくなってしまっている。。。
指示通り、ghcとcabal-installを入れてみる。
$ brew install ghc cabal-install Error: ghc-7.6.3 already installed To install this version, first `brew unlink ghc' ==> Installing dependencies for cabal-install: gmp, ghc ==> Installing cabal-install dependency: gmp ==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/gmp-6.0.0a. ######################################################################## 100.0% ==> Pouring gmp-6.0.0a.mavericks.bottle.tar.gz 🍺 /usr/local/Cellar/gmp/6.0.0a: 15 files, 3.2M ==> Installing cabal-install dependency: ghc ==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/ghc-7.8.3.m ######################################################################## 100.0% ==> Pouring ghc-7.8.3.mavericks.bottle.1.tar.gz 🍺 /usr/local/Cellar/ghc/7.8.3: 5742 files, 724M ==> Installing cabal-install ==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/cabal-insta ######################################################################## 100.0% ==> Pouring cabal-install-1.20.0.3_1.mavericks.bottle.1.tar.gz ==> Caveats Bash completion has been installed to: /usr/local/etc/bash_completion.d Error: The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local Could not symlink bin/cabal Target /usr/local/bin/cabal is a symlink belonging to haskell-platform. You can unlink it: brew unlink haskell-platform To force the link and overwrite all conflicting files: brew link --overwrite cabal-install To list all files that would be deleted: brew link --overwrite --dry-run cabal-install Possible conflicting files are: /usr/local/bin/cabal -> /usr/local/Cellar/haskell-platform/2013.2.0.0/bin/cabal ==> Summary 🍺 /usr/local/Cellar/cabal-install/1.20.0.3_1: 5 files, 18M $ ghc -v Glasgow Haskell Compiler, Version 7.8.3, stage 2 booted by GHC version 7.8.3 :
何とか入ったらしい。でも、本当にこの手順で良かったのか?