如何在cabal-dev安装中启用分析

Question

我正在尝试配置一个程序windingnumber，它有一些依赖关系。根据Aleksander Dmitrov在Profile Haskell中的回答，我使用cabal-dev来(尝试)在启用了分析的情况下构建所有依赖。我试过了

• cabal-dev install --config=./cabal-dev.config，其中cabal-dev。配置是

  library-profiling: True
  executable-profiling: True
  package-db: /home/christopher/school/senior/senior_thesis/windingnumber_integration/cabal-dev/packages-7.6.1.conf
  local-repo: /home/christopher/school/senior/senior_thesis/windingnumber_integration/cabal-dev/packages
  user-install: False
  remote-repo: hackage.haskell.org:http://hackage.haskell.org/packages/archive
  remote-repo-cache: /home/christopher/.cabal/packages
  optimization: True
  build-summary: /home/christopher/school/senior/senior_thesis/windingnumber_integration/cabal-dev/logs/build.log
  remote-build-reporting: anonymous
  optimization: True
  install-dirs user
    prefix: /home/christopher/school/senior/senior_thesis/windingnumber_integration/cabal-dev/
  install-dirs global
  

• cabal-dev install --cabal-install-arg='--enable-library-profiling' --cabal-install-arg='--enable-executable-profiling'

(中间有rm -rf cabal-dev，当然是从原始环境开始。)在每种情况下，我得到:

arch% cabal-dev/bin/windingnumber +RTS -p
cabal-dev/bin/windingnumber +RTS -p
windingnumber: the flag -p requires the program to be built with -prof
windingnumber: 
windingnumber: Usage: <prog> <args> [+RTS <rtsopts> | -RTS <args>] ... --RTS <args>
<snip>

——即。，剖析未启用。我如何启用它?

ETA解决方案:将-prof添加到.cabal文件中的ghc-options中。显然，在cabal-dev配置中设置"executableprofiling: True"并没有做到这一点。感谢Daniel Fischer

Answer 1

看起来cabal-dev每次运行时都会重写./cabal-dev/cabal.config。但是，您可以编辑~/.cabal/share/cabal-dev-$VERSION/admin/cabal-config.in以设置默认值:

$  vim ~/.cabal/share/cabal-dev-0.9.1/admin/cabal-config.in
# Set executable-profiling and library-profiling to True
$ cabal unpack ghc-core
$ cd ghc-core-0.5.6
$ cabal-dev install --dependencies-only
$ cabal-dev configure -p
$ cabal-dev build
$ ./dist/build/ghc-core/ghc-core +RTS -p
# much success

如果您不想为所有使用cabal-dev管理的项目启用分析，请使用--extra-config-file选项(--config只是设置自动生成配置文件的位置):

$ cat cabal-dev.config 
executable-profiling: True
library-profiling: True
$ cabal-dev --extra-config-file='./cabal-dev.config' install
$ ./cabal-dev/bin/ghc-core +RTS -p
# success

不建议使用.cabal文件中的ghc-options字段来启用分析—您不希望每个从Hackage安装您的包的人都使用分析构建。使用cabal-dev configure -p --ghc-options="-fprof-auto"只启用当前构建的分析