我的haskell安装找不到操作系统安装的字节串模块
$ ghci
GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Prelude> :m +Data.ByteString.Lazy
<no location info>:
Could not find module `Data.ByteString.Lazy'
It is not a module in the current program, or in any known package.
但是我已经使用yum安装了这个模块：
$ rpm -ql ghc-bytestring
/usr/lib64/ghc-7.6.3/bytestring-0.10.0.2
/usr/lib64/ghc-7.6.3/bytestring-0.10.0.2/libHSbytestring-0.10.0.2-ghc7.6.3.so
/usr/share/doc/ghc-bytestring
/usr/share/doc/ghc-bytestring/LICENSE
怎么了？
这里的情况类似于C ++，您有在动态链接阶段使用的库和用于编译的标头。在Fedora中，像ghc-bytestring这样的包只是没有头文件的库。要安装标题，我必须安装ghc-bytestring-devel软件包。
关于Fedora 24的示例：
server.hs:7:8:
Could not find module ‘Data.Text’
Perhaps you meant Data.Set (from containers-0.5.5.1)
Locations searched:
Data/Text.hs
Data/Text.lhs
因此，更改为user root，然后：
有什么包装？
# dnf search ghc|grep text
ghc-text.x86_64 : An efficient packed Unicode text type
ghc-boxes.x86_64 : 2D text pretty-printing library
ghc-pango.x86_64 : Binding to the Pango text rendering engine
ghc-css-text.x86_64 : CSS parser and renderer
ghc-hgettext.x86_64 : Haskell binding to libintl
ghc-attoparsec.x86_64 : Fast combinator parsing for bytestrings and text
ghc-text-devel.x86_64 : Haskell text library development files
ghc-blaze-textual.x86_64 : Fast rendering of common datatypes
ghc-css-text-devel.x86_64 : Haskell css-text library development files
ghc-hgettext-devel.x86_64 : Haskell hgettext library development files
ghc-blaze-textual-devel.x86_64 : Haskell blaze-textual library development files
那么安装了什么？
# rpm --query ghc-text
ghc-text-1.1.1.3-3.fc24.x86_64
# rpm --query ghc-text-devel
package ghc-text-devel is not installed
因此，让我们安装devel软件包。
# dnf install ghc-text-devel
Installed:
ghc-text-devel.x86_64 1.1.1.3-3.fc24
...然后编译成功。
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句