为Haskell安装Yesod的问题

Question

我正在尝试为Mac安装Haskell和Yesod following this guide。一切顺利，直到最后一步，当我收到此错误消息。我试图手动安装hfsevebts-0.1.4，但它给了我同样的错误。

gcc-4.8: error: language objective-c not recognized
gcc-4.8: error: language objective-c not recognized
cabal: Error: some packages failed to install:
fsnotify-0.0.11 depends on hfsevents-0.1.4 which failed to install.
hfsevents-0.1.4 failed during the building phase. The exception was:
ExitFailure 1
yesod-bin-1.2.3.4 depends on hfsevents-0.1.4 which failed to install.

如何安装Yesod？

Answer 1

我认为这为我解决了这个问题：

   $ brew uninstall gcc48
   $ brew install gcc48 --enable-all-languages

据推测，默认的gcc48不包括Objective-C。

Answer 2

我遇到了同样的错误 - 许多其他人 - 试图在10.8.5上安装yesod。我有幸从Haskell卸载软件包并通过Homebrew安装Haskell。我升级到10.9并且一切仍然有效（但我必须重新安装Xcode命令行工具）

如果您需要详细信息，我会在我的网站上记录installing yesod on os x。