Cabal无法确定GHC版本 [英] Cabal can't determine GHC version

问题描述

我目前正在尝试通过以下方式更新Cabal（1.14.0，版本为4.0的cabal安装）

I am currently trying to update Cabal (1.14.0, cabal-install at version 0.14.0) by doing

cabal install cabal-install

但是，这给我一个带有错误的ExitFailure1

However, this gives me an ExitFailure1 with the error

setup: The program ghc version >=6.4 is required but the 
version of /usr/bin/ghc could not be determined.

但是我肯定运行的是GHC更大的版本。

But I'm definitely running a version of GHC that is greater than that.

$ /usr/bin/ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.4.2

重要的是，我使用的是OSX 10.8，并且要通过Mac上的Haskell Platform下载来安装Haskell。

It might be important that I'm on OSX 10.8 and that I installed Haskell through the Haskell Platform download for Mac.

有人对如何解决此问题有建议吗？我尚未找到有关此问题的任何文档。

Does anyone have advice on how to fix or work around this issue? I haven't been able to find any documentation on this problem.

推荐答案

由于您使用的是Mac，为什么不尝试安装出色的自制软件程序包管理器？将 / usr / local / bin 添加到您的PATH中，然后只需 brew install cabal-install 。

Since you're on a Mac, why not try installing the excellent Homebrew package manager? Add /usr/local/bin to your PATH, and then it's just brew install cabal-install.

您甚至可以酿造ghc haskell平台。

要升级软件包列表，请使用 brew upgrade ，然后您可以查看需要使用 brew过时的更新的内容，并使用酿造更新。

To upgrade the package list, use brew upgrade, then you can see what needs updating with brew outdated and update them with brew update.

当然，您可以命名各个软件包以进行更新，并指定软件包的版本。 Homebrew将食谱（Ruby脚本）保留在其自己的git存储库中（默认情况下在/ usr / local中）。

Of course, you can name individual packages to update also, and specify versions of packages. Homebrew keeps the "recipes" (Ruby scripts) for package management in its own git repository (by default in /usr/local).

然后您可以继续进行操作首先您真的想做...编写一些代码！ （或根据您的情况构建）

Then you can get on with what you really wanted to do in the first place...write some code! (or build, in your case)

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