用堆栈分析 [英] Profiling with Stack

问题描述

我正在尝试在Stack中进行概要分析，以便获得与第25 章。我开始了一个新的Stack项目，如下所示：

I'm trying to get profiling working in Stack, so that I can get the same metrics as the one indicated on Chapter 25 of RWH. I started a new Stack project, as follows:

stack new test

然后，如所示这里我运行了：

Then, as indicated here I ran:

stack install --executable-profiling --library-profiling --ghc-options="-rtsopts"

但是此命令失败，并出现以下错误：

However this command fails with the following error:

    While constructing the BuildPlan the following exceptions were encountered:

--  While attempting to add dependency,
    Could not find package base in known packages

--  Failure when adding dependencies:    
      base: needed (>=4.7 && <5), stack configuration has no specified version (latest applicable is 4.9.0.0)
    needed for package test-0.1.0.0

Recommended action: try adding the following to your extra-deps in /home/damian/test/stack.yaml
- base-4.9.0.0

You may also want to try the 'stack solver' command

我尝试了上面的建议，没有成功。

I've tried the recommendations above, without success.

如果我运行 stack build ，

还有一个问题，我想知道是否无法运行 stack test 或带有上述标志的 stack exec （这似乎比安装可执行文件以进行分析更合乎逻辑）。

As an additional question, I wonder whether is not possible to run stack test or stack exec with the flags above (this seems more logical than installing a the executable in order to profile it).

推荐答案

它适用于 lts-6.4 。对我来说，这表明您没有安装基本配置文件的版本。在安装GHC时，需要进行安装。 stack exec是什么-ghc 说什么？如果ghc不在您的堆栈根目录〜/ .stack / programs 中，则意味着您使用的是自定义GHC安装，该安装可能缺少配置文件版本基地。要解决该问题，请：

It works for me on lts-6.4. To me, this indicates that you don't have a profiling version of base installed. This would need to get installed when installing GHC. What does stack exec -- which ghc say? If ghc isn't located in your stack root, ~/.stack/programs, then this means that you're using a custom GHC install, which may lack a profiling version of base. To resolve, either:

1）删除自定义安装并运行堆栈设置
2）或者，设置 system-ghc： false 并运行堆栈设置

1) Remove custom install and run "stack setup" 2) Alternatively, set system-ghc: false and run "stack setup"

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