在Windows中编译Haskell程序:是否可以不下载Cygwin之类的东西? [英] Compiling Haskell programs in Windows: is it possible without downloading something such as Cygwin?

问题描述

我正在阅读向您学习Haskell，以获取极大的好处"，并且已经达到了有关I/O操作的章节.我正在使用Windows，并且已经下载了GHCi和WinGHCi.

I am reading "Learn you a Haskell for great good", and have reached the chapter on I/O actions. I am using Windows, and have downloaded GHCi and WinGHCi.

我正在尝试编译一个简单的程序，并已在emacs上将文件另存为helloworld.hs，其中包含main = putStrLn "hello, world".

I'm trying to compile a simple program and have saved a file on emacs as helloworld.hs with main = putStrLn "hello, world" in it.

这本书说

打开终端，导航到helloworld.hs所在的目录，然后输入以下内容:

Open your terminal, navigate to the directory where helloworld.hs is located, and enter the following:

$ ghc --make helloworld

但是，如果我在GHCi和WinGHCi上输入$ ghc --make helloworld，则会收到诸如以下错误消息，可能是因为我需要在其他位置输入$ ghc --make helloworld:

However, if I enter $ ghc --make helloworld onto GHCi and WinGHCi I receive errors such as the one below, perhaps because I need to enter $ ghc --make helloworld elsewhere:

<interactive>:7:1: error:
    parse error on input ‘$’
    Perhaps you intended to use TemplateHaskell

实际上，在该书的在线版本中(此处: http://learnyouahaskell.com/输入和输出)，作者指出:

In fact, in the online edition of the book (here: http://learnyouahaskell.com/input-and-output), the author remarks that:

在本章中，我将假设您使用的是unix-y环境来学习Haskell.如果您使用的是Windows，建议您下载Cygwin，这是适用于Windows的类似于Linux的环境，也称为A.K.A.正是您所需要的.

For the purposes of this chapter, I'm going to assume you're using a unix-y environment for learning Haskell. If you're in Windows, I'd suggest you download Cygwin, which is a Linux-like environment for Windows, A.K.A. just what you need.

问题1 :为了能够通过输入$ ghc --make helloworld来编译程序，我是否需要下载Cygwin或其他类似的东西?

Question 1: Is it necessary for me to download Cygwin, or some other such thing, in order to be able to compile the program by entering $ ghc --make helloworld?

我问这个问题，因为如果还有其他编译程序的方法，那将非常有用，因为我在大学计算机上，未经许可就无法下载Cygwin之类的内容. (即使获得许可，也可能无法实现，具体取决于Cygwin的要求)

I ask this, since if there were some other way of compiling the program it would be very useful to know, since I am on a university computer and cannot download things like Cygwin without permission. (and even with permission it might not be possible, depending on what Cygwin requires)

问题2 :鉴于只有我大学的技术人员可以参加复活节活动，并且只有他们可以在此计算机上下载内容，我才能继续本章在I/O动作中?是否可以继续，而忽略涉及编译程序的部分?

Question 2: Given that only the technicians of my university are away for Easter, and only they can download things on this computer, how can I proceed with the chapter in I/O actions? Is it possible just to continue, but ignore the sections involving compiling programs?

推荐答案

在许多Unix和Linux外壳程序中(至少在我最熟悉的Bash中)，默认提示符为$.这就是外壳显示的内容.

In many Unix and Linux shells (at least in Bash with which I'm most familiar) the default prompt is $. That's what the shell displays.

在Windows上，当您打开命令提示符时，通常会看到类似以下的内容:

On Windows, when you open a Command Prompt, you'll typically see something like this instead:

C:\Users\mark>

(这是我的提示.)

尽管说明中通常包含$提示符，以指示代码是您希望在命令提示符下输入的内容，但您不应键入$.只需键入ghc --make helloworld并按 Enter .

While instructions often include the $ prompt in order to indicate that the code is something that you're expected to enter at a command prompt, you're not expected to type the $. Just type ghc --make helloworld and hit Enter.

此外，您不希望从GHCi内部执行此操作，而应从命令行执行. ghc是命令行可执行文件(.exe)，例如git.但是，它必须位于您的path中，否则，每次运行该可执行文件时，您都必须键入完整路径.

Also, you're not expected to do this from within GHCi, but from the command line. ghc is a command-line executable (an .exe), just like e.g. git. It has to be in your path, though, or otherwise, you'll have to type the full path the executable every time you want to run it.

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