我有一个通过cabal安装的软件包：Data.Vector
但是当我尝试编译其中包含import Data.Vector的程序时：
Drews-MacBook-Pro:Blokus-AI drewgross$ ghc --make -O2 -prof -auto-all playGame
Grid.hs:28:8:
Could not find module `Data.Vector'
Perhaps you meant
Data.Tensor (from Tensor-1.0.0.1)
Data.Functor (from base)
Use -v to see a list of the files searched for.
Drews-MacBook-Pro:Blokus-AI drewgross$
我以前安装的命令是：
cabal install -p --reinstall --force-reinstalls vector
我尝试将程序编译成其他各种东西，但没有任何效果。我真的想删除所有内容，回到原点并再次下载包。我怎么能这样做？
编辑：进一步的调查显示可能有2个版本的Data.Vector：0.10.0.1和0.9.1，也许它们有某种冲突？
编辑：ghc-pkg check列出没有错误，但给了我很多警告，如下所示：
Warning: haddock-interfaces: /Users/drewgross/.cabal/share/doc/haskell-lexer-1.0/html/haskell-lexer.haddock doesn't exist or isn't a file
编辑：GCHi也找不到它
λ> import Data.Vector
<no location info>:
Could not find module `Data.Vector'
Perhaps you meant Data.Functor (from base)
λ>
修改：ghc-pkg list vector：
Drews-MacBook-Pro:Blokus-AI drewgross$ ghc-pkg list vector
/Library/Frameworks/GHC.framework/Versions/7.4.2-x86_64/usr/lib/ghc-7.4.2/package.conf.d
/Users/drewgross/.ghc/x86_64-darwin-7.4.2/package.conf.d
vector-0.10.0.1
Drews-MacBook-Pro:Blokus-AI drewgross$
并使用-v标志构建：
Drews-MacBook-Pro:Blokus-AI drewgross$ ghc --make -O2 -prof -auto-all -v playGame
Glasgow Haskell Compiler, Version 7.4.2, stage 2 booted by GHC version 7.4.2
Using binary package database: /usr/local/Cellar/ghc/7.4.2/lib/ghc-7.4.2/package.conf.d/package.cache
Using binary package database: /Users/drewgross/.ghc/x86_64-darwin-7.4.2/package.conf.d/package.cache
package Cabal-1.16.0.3-e689d8e77b2f476229954cd43b1737bd is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd directory-1.1.0.2-72e928d14fc50f31f7e6404839a15691 unix-2.5.1.1-29636eb78541401e8e00393ef5df097e
package Tensor-1.0.0.1-a8f1a59665c3ebc4867678a14fe1460f is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
package binary-0.5.1.1-e62c39c3aba8093e9b9655a4a8d2bce9 is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd bytestring-0.10.0.1-9b03e69060669eabf0b20e150305c7be
package bmp-1.2.3.2-c7572ec2bbb802bfd93fed0953c61d5d is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd binary-0.5.1.1-e62c39c3aba8093e9b9655a4a8d2bce9 bytestring-0.10.0.1-9b03e69060669eabf0b20e150305c7be
package bytestring-0.10.0.1-9b03e69060669eabf0b20e150305c7be is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
package ghc-paths-0.1.0.9-4e6c624a3431a4fa7630e4fb77be4c83 is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
package haskell-lexer-1.0-8fea1c35b626a2de761522690a88c063 is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
package primitive-0.4.1-0007d441db5f4ce1ffd66bd3816c2d4e is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
package split-0.2.1.1-03ec5738edb34f2e8967d25637b9392f is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
package vector-0.10.0.1-3450daae3d9f2092020075d05481123c is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd primitive-0.5.0.1-15cdc8c11a54a78809b647af0c2975b3
wired-in package ghc-prim mapped to ghc-prim-0.2.0.0-7d3c2c69a5e8257a04b2c679c40e2fa7
wired-in package integer-gmp mapped to integer-gmp-0.4.0.0-af3a28fdc4138858e0c7c5ecc2a64f43
wired-in package base mapped to base-4.5.1.0-47f48c3ae7f8256a66a23e9dfe22eefc
wired-in package rts mapped to builtin_rts
wired-in package template-haskell mapped to template-haskell-2.7.0.0-e109822dcbed82c43f9fa60194eb64b5
wired-in package dph-seq not found.
wired-in package dph-par not found.
Hsc static flags: -fscc-profiling -static
*** Chasing dependencies:
Chasing modules from: *playGame.hs
Grid.hs:28:8:
Could not find module `Data.Vector'
Perhaps you meant Data.Functor (from base)
Locations searched:
Data/Vector.hs
Data/Vector.lhs
*** Deleting temp files:
Deleting:
*** Deleting temp dirs:
Deleting:
Drews-MacBook-Pro:Blokus-AI drewgross$
这是shell使用的：
Drews-MacBook-Pro:Blokus-AI drewgross$ which ghc
/usr/bin/ghc
我做了cabal install -v lens，显然有大量的输出，但我认为这是相关部分：
Registering lens-3.7.0.2...
/usr/bin/ghc-pkg update - --global --user
Updating world file...
Drews-MacBook-Pro:Blokus-AI drewgross$
这似乎表明他们使用的是同一版本。如果相关的话，我可以发布更多的cabal安装输出。
编辑：来自cabal install -v
的更多ghc输出Building lens-3.7.0.2...
Preprocessing library lens-3.7.0.2...
Building library...
creating dist/build
/usr/bin/ghc --make -package-name lens-3.7.0.2 -hide-all-packages -fbuilding-cabal-package -i -idist/build -isrc -idist/build/autogen -Idist/build/autogen -Idist/build -optP-DTRUSTWORTHY=1 -optP-DDEFAULT_SIGNATURES=1 -optP-include -optPdist/build/autogen/cabal_macros.h -odir dist/build -hidir dist/build -stubdir dist/build -package-id array-0.4.0.0-0b6c5ca7e879a14d110ca4c001dd9297 -package-id base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd -package-id bytestring-0.9.2.1-0044644a71adfe5e950e6c6f6ca13065 -package-id comonad-3.0.0.2-6ef27fce8536ebdf9c364307a0915f63 -package-id comonad-transformers-3.0-a6df581636b1c9b514cfa6560f17d6a3 -package-id comonads-fd-3.0-b906ed7898871c5d2427052e2eefa62e -package-id containers-0.4.2.1-75f143aa39a3e77a1ce2300025bdd8ce -package-id filepath-1.3.0.0-f998e5510c76a98913f57b14b4f16c57 -package-id ghc-prim-0.2.0.0-7d3c2c69a5e8257a04b2c679c40e2fa7 -package-id hashable-1.1.2.5-14291f3b4e96b5599759ce7daa2bd37c -package-id mtl-2.1.2-02e701f9b1590ee88a0b5b0bd5d93a29 -package-id parallel-3.2.0.3-4cdd6067624f867b253b98d6d9fb9f52 -package-id semigroups-0.8.4.1-4d3a86b037504e6000a0354510588745 -package-id split-0.2.1.1-03ec5738edb34f2e8967d25637b9392f -package-id template-haskell-2.7.0.0-29110cc89a711d6ab3e7ee0e0a8ee949 -package-id text-0.11.2.3-473d9a1761b27c7315f2ef4569d93c3c -package-id transformers-0.3.0.0-8e66ecc7d4dae2b07b2b5406908c70e4 -package-id unordered-containers-0.2.2.1-d70d5ccb1df11dbbbaac89571b1ee46d -package-id vector-0.10.0.1-3450daae3d9f2092020075d05481123c -O -Wall -fwarn-tabs -O2 -fdicts-cheap -funbox-strict-fields -XHaskell98 Control.Lens.TH Language.Haskell.TH.Lens Control.Exception.Lens Control.Lens Control.Lens.Action Control.Lens.Classes Control.Lens.Combinators Control.Lens.Fold Control.Lens.Getter Control.Lens.Indexed Control.Lens.IndexedGetter Control.Lens.IndexedFold Control.Lens.IndexedLens Control.Lens.IndexedSetter Control.Lens.IndexedTraversal Control.Lens.Internal Control.Lens.Internal.Zipper Control.Lens.Iso Control.Lens.Loupe Control.Lens.Plated Control.Lens.Prism Control.Lens.Representable Control.Lens.Setter Control.Lens.Simple Control.Lens.Traversal Control.Lens.Tuple Control.Lens.Type Control.Lens.WithIndex Control.Lens.Wrapped Control.Lens.Zipper Control.Lens.Zoom Data.Bits.Lens Data.ByteString.Lens Data.ByteString.Strict.Lens Data.ByteString.Lazy.Lens Data.Complex.Lens Data.Data.Lens Data.Dynamic.Lens Data.HashSet.Lens Data.IntSet.Lens Data.List.Lens Data.List.Split.Lens Data.Sequence.Lens Data.Set.Lens Data.Text.Lens Data.Text.Strict.Lens Data.Text.Lazy.Lens Data.Tree.Lens Data.Typeable.Lens Data.Vector.Lens Data.Vector.Generic.Lens GHC.Generics.Lens Data.Array.Lens System.FilePath.Lens Control.Parallel.Strategies.Lens Control.Seq.Lens Control.Lens.Internal.Combinators
[ 1 of 57] Compiling Control.Lens.Classes ( src/Control/Lens/Classes.hs, dist/build/Control/Lens/Classes.o )
[ 2 of 57] Compiling Control.Lens.Internal ( src/Control/Lens/Internal.hs, dist/build/Control/Lens/Internal.o )
[ 3 of 57] Compiling Control.Lens.Internal.Combinators ( src/Control/Lens/Internal/Combinators.hs, dist/build/Control/Lens/Internal/Combinators.o )
[ 4 of 57] Compiling Control.Lens.Indexed ( src/Control/Lens/Indexed.hs, dist/build/Control/Lens/Indexed.o )
[ 5 of 57] Compiling Control.Lens.IndexedGetter ( src/Control/Lens/IndexedGetter.hs, dist/build/Control/Lens/IndexedGetter.o )
[ 6 of 57] Compiling Control.Lens.Action ( src/Control/Lens/Action.hs, dist/build/Control/Lens/Action.o )
[ 7 of 57] Compiling Control.Lens.Setter ( src/Control/Lens/Setter.hs, dist/build/Control/Lens/Setter.o )
编辑：ghc-pkg dump
Drews-MacBook-Pro:Blokus-AI drewgross$ ghc-pkg dump | grep "id: base"
id: base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
答案 0 :(得分：6)
您的包数据库严重受损。 ghc -v输出由于缺少或递归依赖性而列出了十个不可用的包，其中包括vector：
package vector-0.10.0.1-3450daae3d9f2092020075d05481123c is unusable due to missing or recursive dependencies:
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd primitive-0.5.0.1-15cdc8c11a54a78809b647af0c2975b3
所有破坏的包有一个共同点是缺少（？）依赖
base-4.5.1.0-81d626fb996bc7e140a3fd4481b338cd
其中
wired-in package base mapped to base-4.5.1.0-47f48c3ae7f8256a66a23e9dfe22eefc
used base有不同的哈希值。
我不确定这是怎么发生的，据我所知，重新安装base是不可能的，但看起来你有两个ghc-7.4.2样本，他们踩到了彼此的脚趾。
ghc-pkg list使用
/Library/Frameworks/GHC.framework/Versions/7.4.2-x86_64/usr/lib/ghc-7.4.2/package.conf.d
表示全局包数据库，而编译使用
Using binary package database: /usr/local/Cellar/ghc/7.4.2/lib/ghc-7.4.2/package.conf.d/package.cache
现在，可能是两个中至少有一个是符号链接，而且它们都指向同一个地方 - 然后你的package.cache不同步 - 但是
Glasgow Haskell Compiler, Version 7.4.2, stage 2 booted by GHC version 7.4.2
由相同版本启动的GHC似乎不寻常。
你能确定你是否确实有两个ghc-7.4.2，命令行使用的是cabal使用的不同的命令行吗？ which ghc告诉您shell使用哪一个，cabal install -v some-package输出命令行cabal使用，包括使用的GHC的完整路径。
答案 1 :(得分：2)
您可以使用ghc-pkg list列出已安装的软件包。例如（显然我需要更新），
$ ghc-pkg list | grep vector
vector-0.9.1
vector-algorithms-0.5.4
vector-algorithms-0.5.4.2
vector-space-0.8.0
vector-strategies-0.3
您可以使用ghc-pkg unregister取消注册。前，
$ ghc-pkg unregister vector-0.9.1
然后cabal update && cabal install vector应该从hackage获取最新版本。
答案 2 :(得分：0)
在我通过现有的（自制的）ghc安装[Mac OS Mavericks 10.9。+]安装Haskell平台之后，我遇到了与另一个模块类似的问题。我用自制软件卸载了之前的ghc
brew uninstall ghc
并重新运行Haskell Platform安装程序（Mac上为.pkg）。然后我不得不
sudo ghc-pkg recache
解决
上的过时警告ghc-pkg list
这解决了我的问题。
答案 3 :(得分：0)
您可能希望将软件包添加到您的.cabal文件中