edd*_*dex 9 haskell cabal cabal-install
我想在 Ubuntu 20.04 上安装 Cabal 3.4.0.0。
$ sudo apt install cabal-install
$ cabal --version
cabal-install version 2.4.0.0
$ sudo cabal update
$ sudo cabal install Cabal cabal-install
...
Starting zlib-0.6.2.3
Failed to install zlib-0.6.2.3
Build log ( /root/.cabal/logs/ghc-8.6.5/zlib-0.6.2.3-93Wbo8gIIzI9bg4p2MsNUF.log ):
cabal: Entering directory '/tmp/cabal-tmp-126381/zlib-0.6.2.3'
Configuring zlib-0.6.2.3...
cabal: Missing dependency on a foreign library:
* Missing (or bad) header file: zlib.h
* Missing (or bad) C library: z
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.If the
library file does exist, it may contain errors that are caught by the C
compiler at the preprocessing stage. In this case you can re-run configure
with the verbosity flag -v3 to see the error messages.
If the header file does exist, it may contain errors that are caught by the C
compiler at the preprocessing stage. In this case you can re-run configure
with the verbosity flag -v3 to see the error messages.
...
cabal: Error: some packages failed to install:
cabal-install-3.4.0.0-3glzV3hM64DLoOfz3dHKsn depends on cabal-install-3.4.0.0
which failed to install.
hackage-security-0.6.0.1-KiAyVYLxooJAP3ckeQHnBD depends on
hackage-security-0.6.0.1 which failed to install.
zlib-0.6.2.3-93Wbo8gIIzI9bg4p2MsNUF failed during the configure step. The
exception was:
ExitFailure 1
错误说：
这个问题通常可以通过安装提供这个库的系统包来解决（你可能需要“-dev”版本）。
如何在 Ubuntu 20.04 上安装此软件包？
Wil*_*sem 10
您的目标是安装该cabal-install软件包。该包有一个依赖项，这会产生一个问题：zlib包.
这个包本质上是C 库 [wikipedia] 的zlib一个薄包装。然而，正如错误所示，您没有安装该库，或者至少没有安装可以使用该库进行开发的包。zlibzlibzlib
我们可以通过安装libghc-zlib-dev软件包来安装它，例如：
sudo apt-get install libghc-zlib-dev如果我们检查Debian 上的软件包详细信息，我们会发现本质上这是一个将安装该zlib1g-dev软件包的软件包，即使用该库开发软件的软件包zlib。因此，我们可以决定安装libghc-zlib-dev, 或者zlib1g-dev：
sudo apt-get install zlib1g-dev