wxHaskell失败，因为它依赖于wx_macu-2.8

Question

我安装与使用MacPorts的wxWidgets然后运行命令：sudo cabal install wx，其中包括输出：

/bin/sh: wxdirect: command not found 
/bin/sh: wxdirect: command not found 
/bin/sh: wxdirect: command not found 
/bin/sh: wxdirect: command not found 
Configuring wxcore-0.12.1.6... 
setup: Missing dependency on a foreign library: 
* Missing C library: wx_macu-2.8 
This problem can usually be solved by installing the system package that 
provides this library (you may need the "-dev" version). If the library is 
already installed but in a non-standard location then you can use the flags 
--extra-include-dirs= and --extra-lib-dirs= to specify where it is. 
cabal: Error: some packages failed to install: 
wx-0.12.1.6 depends on wxcore-0.12.1.6 which failed to install. 
wxcore-0.12.1.6 failed during the configure step. The exception was: 
ExitFailure 1 

我得到了同样的错误，当我使用这个命令：sudo cabal install wx --extra-include-dirs=/opt/local --extra-lib-dirs=/opt/local。我如何安装wx_macu-2.8，或者做我需要做的事来解决这个问题？

Answer 1

这是说你缺少一个C库，而不是一个Haskell库。 Cabal不能安装任意的C库。

检查你的发行版的包管理器，确保你拥有与wxWidgets-2.8相关的所有东西，包括任何开发包。