用Cabal安裝HTF時出現故障

Question

我想安裝HTF。不過我cabal install HTF後，我得到這個：

Resolving dependencies... 
Configuring HTF-0.10.0.7... 
Warning: This package indirectly depends on multiple versions of the same 
package. This is highly likely to cause a compile failure. 
package regex-base-0.93.2 requires mtl-2.0.1.0 
package aeson-0.6.0.2 requires mtl-2.1.2 
package HTF-0.10.0.7 requires mtl-2.1.2 
package mtl-2.0.1.0 requires transformers-0.2.2.0 
package transformers-base-0.4.1 requires transformers-0.3.0.0 
package mtl-2.1.2 requires transformers-0.3.0.0 
package monad-control-0.3.1.4 requires transformers-0.3.0.0 
Building HTF-0.10.0.7... 
Preprocessing library HTF-0.10.0.7... 
ghc: could not execute: cpphs 
cabal: Error: some packages failed to install: 
HTF-0.10.0.7 failed during the building phase. The exception was: 
ExitFailure 1 

我試圖安裝其他版本，但已經得到了不同的問題。例如， 與cabal install 'HTF <= 0.1'我得到如下：

Resolving dependencies... 
Downloading QuickCheck-1.2.0.1... 
Configuring QuickCheck-1.2.0.1... 
Building QuickCheck-1.2.0.1... 
Preprocessing library QuickCheck-1.2.0.1... 
[1 of 8] Compiling Test.QuickCheck (Test/QuickCheck.hs, dist/build/Test/QuickCheck.o) 
[2 of 8] Compiling Test.QuickCheck.Batch (Test/QuickCheck/Batch.hs, dist/build/Test/QuickCheck/Batch.o) 
[3 of 8] Compiling Test.QuickCheck.Utils (Test/QuickCheck/Utils.hs, dist/build/Test/QuickCheck/Utils.o) 
[4 of 8] Compiling Test.QuickCheck.Poly (Test/QuickCheck/Poly.hs, dist/build/Test/QuickCheck/Poly.o) 
[5 of 8] Compiling Debug.QuickCheck.Poly (Debug/QuickCheck/Poly.hs, dist/build/Debug/QuickCheck/Poly.o) 
[6 of 8] Compiling Debug.QuickCheck.Utils (Debug/QuickCheck/Utils.hs, dist/build/Debug/QuickCheck/Utils.o) 
[7 of 8] Compiling Debug.QuickCheck (Debug/QuickCheck.hs, dist/build/Debug/QuickCheck.o) 
[8 of 8] Compiling Debug.QuickCheck.Batch (Debug/QuickCheck/Batch.hs, dist/build/Debug/QuickCheck/Batch.o) 
Registering QuickCheck-1.2.0.1... 
Installing library in /home/xxx/.cabal/lib/QuickCheck-1.2.0.1/ghc-7.4.1 
Registering QuickCheck-1.2.0.1... 
Downloading HTF-0.1... 
Configuring HTF-0.1... 
Building HTF-0.1... 
Preprocessing library HTF-0.1... 
[1 of 8] Compiling Test.Framework.Utils (Test/Framework/Utils.hs, dist/build/Test/Framework/Utils.o) 
[2 of 8] Compiling Test.Framework.Process (Test/Framework/Process.hs, dist/build/Test/Framework/Process.o) 

Test/Framework/Process.hs:45:48: 
    Ambiguous type variable `a0' in the constraints: 
     (Show a0) 
     arising from a use of `show' at Test/Framework/Process.hs:45:48-51 
     (Control.Exception.Exception a0) 
     arising from a use of `Control.Exception.handle' 
     at Test/Framework/Process.hs:45:5-28 
    Probable fix: add a type signature that fixes these type variable(s) 
    In the expression: show e 
    In the first argument of `return', namely 
     `([], show e, error (show e))' 
    In the expression: return ([], show e, error (show e)) 
cabal: Error: some packages failed to install: 
HTF-0.1 failed during the building phase. The exception was: 
ExitFailure 1 

我也得到類似cabal install 'HTF <= 0.9'後的第一個成果。我試過ghc-pkg check，它給了我一個破包的列表。我重新安裝了軟件包，並重復嘗試再次安裝HTF，結果相同。

Answer 1

第一個問題是，你有regex-base建對mtl-2.0.1.0，從而

package regex-base-0.93.2 requires mtl-2.0.1.0 
package aeson-0.6.0.2 requires mtl-2.1.2 

HTF將取決於mtl多個版本。這很少起作用。

解決方案將是$ ghc-pkg unregister regex-base。如果ghc-pkg警告說會破壞其他軟件包，那麼您也必須重建這些軟件包。如果手動執行的太多，可以考慮刪除整個用戶軟件包-db（我希望這些軟件包都是用戶安裝的，如果它們是全局安裝的，則不能刪除整個全局數據庫）並重建所有內容與cabal install world。

在regex-base被刪除後，什麼都不會取決於mtl-2.0.1.0了，並且依賴關係不應該引起衝突;實際安裝HTF之前，您應該檢查與

cabal install HTF --dry-run 

如果仍然會有衝突，應該檢測它們，你可以通過註銷進一步包解決這些問題。

下一個問題是

ghc: could not execute: cpphs 

這看起來就好像你在你的PATH沒有cpphs。要麼您沒有安裝它，在這種情況下，您需要在安裝HTF之前執行此操作，否則需要將其安裝目錄添加到PATH。