在Haskell Platform 2013.2.0.0的Mac OS X上安装stylish Haskell时出错

Question

当我尝试在hackage上安装stylish haskell包时，我得到了相同的错误。安装过程进行得很顺利，直到安装了conduit，这还远没有达到正确安装的地步。

错误消息的结尾：

        17 warnings and 2 errors generated.
        Failed to install conduit-1.0.8
        cabal: Error: some packages failed to install:
        conduit-1.0.8 failed during the building phase. The exception was:
        ExitFailure 1
        stylish-haskell-0.5.8.0 depends on conduit-1.0.8 which failed to install. 
        yaml-0.8.5.1 depends on conduit-1.0.8 which failed to install.

我得到的完整终端输出是：

        Configuring conduit-1.0.8...

        /var/folders/cn/67wph78d62qc1v_lm7z2mb980000gn/T/32054.c:1:12:
             warning: control reaches end of non-void function [-Wreturn-type]
        int foo() {}
                   ^
        1 warning generated.
        Building conduit-1.0.8...
        Preprocessing library conduit-1.0.8...

        Data/Conduit/Binary.hs:165:14:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    let c' = c - S.length bs
                         ^

        Data/Conduit/Binary.hs:166:18:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    assert (c' >= 0) $
                             ^

        Data/Conduit/Binary.hs:171:34:
             warning: missing terminating ' character [-Winvalid-pp-token]
                                pullLimited c'
                                             ^

        Data/Conduit/Binary.hs:281:62:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    await >>= maybe (return $ L.fromChunks $ front []) go'
                                                                         ^

        Data/Conduit/Binary.hs:283:11:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    go' bs =
                      ^

        Data/Conduit/Binary.hs:299:39:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    await >>= maybe (return ()) go'
                                                  ^

        Data/Conduit/Binary.hs:301:11:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    go' bs =
                      ^
        7 warnings generated.

        Data/Conduit/Internal.hs:79:47:
             warning: missing terminating ' character [-Winvalid-pp-token]
        -- * /i/ is the type of values for this @Pipe@'s input stream.
                                                      ^

        Data/Conduit/Internal.hs:81:47:
             warning: missing terminating ' character [-Winvalid-pp-token]
        -- * /o/ is the type of values for this @Pipe@'s output stream.
                                                      ^

        Data/Conduit/Internal.hs:152:64:
             warning: \u used with no following hex digits; treating as '\' followed by identifier [-Wunicode]
                local f (NeedInput p c) = NeedInput (\i -> local f (p i)) (\u -> local f (c u))
                                                                           ^

        Data/Conduit/Internal.hs:170:62:
             warning: \u used with no following hex digits; treating as '\' followed by identifier [-Wunicode]
                listen (NeedInput p c) = NeedInput (\i -> listen (p i)) (\u -> listen (c u))
                                                                         ^

        Data/Conduit/Internal.hs:175:26:
             warning: missing terminating ' character [-Winvalid-pp-token]
                     return $ do (x,w') <- listen p
                                     ^

        Data/Conduit/Internal.hs:176:46:
             warning: missing terminating ' character [-Winvalid-pp-token]
                                 return (x, w `mappend` w')
                                                         ^

        Data/Conduit/Internal.hs:180:58:
             warning: \u used with no following hex digits; treating as '\' followed by identifier [-Wunicode]
                pass (NeedInput p c) = NeedInput (\i -> pass (p i)) (\u -> pass (c u))
                                                                     ^

        Data/Conduit/Internal.hs:197:74:
             warning: \u used with no following hex digits; treating as '\' followed by identifier [-Wunicode]
                catchError (NeedInput p c) f = NeedInput (\i -> catchError (p i) f) (\u -> catchError (c u) f)
                                                                                     ^

        Data/Conduit/Internal.hs:306:50:
             warning: missing terminating ' character [-Winvalid-pp-token]
        awaitForever :: Monad m => (i -> Pipe l i o r m r') -> Pipe l i o r m r
                                                         ^

        Data/Conduit/Internal.hs:338:4:
             error: invalid preprocessing directive
              #-}
               ^

        Data/Conduit/Internal.hs:543:13:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    pipe' <- mpipe
                        ^

        Data/Conduit/Internal.hs:544:18:
             warning: missing terminating ' character [-Winvalid-pp-token]
                    case pipe' of
                             ^

        Data/Conduit/Internal.hs:546:29:
             warning: missing terminating ' character [-Winvalid-pp-token]
                        _ -> return pipe'
                                        ^

        Data/Conduit/Internal.hs:581:83:
             warning: missing terminating ' character [-Winvalid-pp-token]
        mapInput f f' (NeedInput p c)    = NeedInput (mapInput f f' . p . f) (mapInput f f' . c)
                                                                                          ^

        Data/Conduit/Internal.hs:584:82:
             warning: missing terminating ' character [-Winvalid-pp-token]
        mapInput f f' (Leftover p i)     = maybe id (flip Leftover) (f' i) $ mapInput f f' p
                                                                                         ^

        Data/Conduit/Internal.hs:605:4:
             error: invalid preprocessing directive
              #-}
               ^

        Data/Conduit/Internal.hs:650:35:
             warning: \u used with no following hex digits; treating as '\' followed by identifier [-Wunicode]
                    loop = awaitE >>= either (\u -> return (u, r)) (\_ -> loop)
                                              ^

        Data/Conduit/Internal.hs:671:14:
             warning: missing terminating ' character [-Winvalid-pp-token]
                let final' = do
                         ^

        Data/Conduit/Internal.hs:674:58:
             warning: missing terminating ' character [-Winvalid-pp-token]
                return (liftIO (I.writeIORef ref False) >> src, final')
                                                                     ^
        17 warnings and 2 errors generated.
        Failed to install conduit-1.0.8
        cabal: Error: some packages failed to install:
        conduit-1.0.8 failed during the building phase. The exception was:
        ExitFailure 1
        stylish-haskell-0.5.8.0 depends on conduit-1.0.8 which failed to install.
        yaml-0.8.5.1 depends on conduit-1.0.8 which failed to install.

Answer 1

我不是这方面的专家，但我认为这是因为Mavericks用一个带有gcc半兼容包装器的clang版本替换了标准的gcc。它会使GHC不时窒息。您可以通过编辑/usr/local/lib/ghc-7.6.3/settings来修复它，以便"C compiler command"条目指向有效的gcc。

例如，我从Homebrew安装了gcc 4.8，然后将设置行更改为

 ("C compiler command", "/usr/local/bin/gcc-4.9")

Answer 2

正如在其他一些答案中提到的，这是因为至少从Xcode5开始的Clang取代了gcc。

为了支持类似于#something宏的c++，GHC依赖于GHC的预处理器，而且看起来Clang的行为略有不同，这导致编译包含这样的宏的haskell源代码失败。

这个补丁实际上显示在Haskell平台的Mac页面的显著位置：https://www.haskell.org/platform/mac.html

它由一个简单的bash脚本组成，该脚本充当Clang的包装器。

要安装它，请执行以下操作：

通过在终端中运行以下指令，转到https://www.haskell.org/platform/ghc-clang-wrapper.

• Press命令-s，将脚本保存在folder.

• Install
• 中：

cd ~/下载chmod +x ghc-clang-wrapper ./ghc-clang-wrapper

• Then遵循它打印的简单说明。

完成后，只需重新启动cabal install命令，它将运行良好。

Answer 3

此问题可以通过以下解决方法修复工作。

https://github.com/snoyberg/conduit/issues/147