问题描述
我的桌面上同时安装了ghc6和ghc7。为了安装新的软件包(针对特定的ghc版本),我使用 cabal
标志 - with-compiler =< ghc-dir>
来指定我希望安装哪个软件包。 我做了 cabal update
之前安装任何新的软件包。但是,如何指定我希望更新哪个ghc?我的意思是,没有 - with-compiler
标志与 cabal install
一样。我认为就像我为ghc7使用 ghc-pkg7
一样,会有 cabal7
。除了 cabal install
命令,我知道它正在应用哪个ghc版本,我不知道哪个ghc受到其他cabal命令的影响。
另外,当我执行 ghc-pkg check
时,发现某些软件包有问题,我不知道如何解决。
在同一台机器上使用多个ghc版本时,我真的很想知道 - 如果有人拥有这些 - 很好的做法。例如如何进行安装,更新等等。 可以创建两个配置文件,比如〜 /.cabal/config
和〜/ .cabal / config7
,并使用un(der)记录的选项 - config-file
在两者之间进行选择。
I got both ghc6 and ghc7 on my desktop. To install new packages (for the specific ghc version), I use cabal
with the flag --with-compiler=<ghc-dir>
to specify for which ghc i want the package installed.
I do cabal update
before installing any new package. But how to I specify for which ghc I want the update? I mean, there is no --with-compiler
flag as with cabal install
. I would think that just like I use ghc-pkg7
for ghc7, there would be cabal7
. Apart from the cabal install
command which I know to which ghc version it is applying, I don't know which ghc is affected with the other cabal commands.
Also, when I do ghc-pkg check
I find problems with some packages and I don't know how to fix.
I would really like to know - if anyone does have - good practices when using multiple ghc versions on the same machine. e.g. how to proceed with installation, updates, etc.
You can create two configuration files, say ~/.cabal/config
and ~/.cabal/config7
, and use the un(der)documented option --config-file
to select between the two.
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