I filed a bug a while back:
http://ghc.haskell.org/trac/ghc/ticket/7752
Someone that understands the API needs to fix the doc. :)
On Thu, Jul 18, 2013 at 7:58 PM, John Blackbox
<blackbox.dev...@gmail.com> wrote:
> Hi!
> Please take a look here: http://www.haskell.org/haskellwiki/GHC/As_a_library
> The examples are not working. Even the simpelst one:
>
> import GHC
>
> import GHC.Paths ( libdir )
>
> import DynFlags ( defaultLogAction )
>
>
>
> main =
>
> defaultErrorHandler defaultLogAction $ do
>
> runGhc (Just libdir) $ do
>
> dflags <- getSessionDynFlags
>
> setSessionDynFlags dflags
>
> target <- guessTarget "test_main.hs" Nothing
>
> setTargets [target]
>
> load LoadAllTargets
>
>
>
> throws:
>
>
> $> ghc -package ghc Main.hs
>
> [1 of 1] Compiling Main ( Main.hs, Main.o )
>
> Main.hs:6:25:
>
> Couldn't match type `DynFlags' with `[Char]'
>
> Expected type: DynFlags.FatalMessager
>
> Actual type: DynFlags.LogAction
>
> In the first argument of `defaultErrorHandler', namely
>
> `defaultLogAction'
>
> In the expression: defaultErrorHandler defaultLogAction
>
> In the expression:
>
> defaultErrorHandler defaultLogAction
>
> $ do { runGhc (Just libdir)
>
> $ do { dflags <- getSessionDynFlags;
>
> setSessionDynFlags dflags;
>
> .... } }
>
> Main.hs:7:7:
>
> Couldn't match expected type `DynFlags.FlushOut'
>
> with actual type `IO SuccessFlag'
>
> In a stmt of a 'do' block:
>
> runGhc (Just libdir)
>
> $ do { dflags <- getSessionDynFlags;
>
> setSessionDynFlags dflags;
>
> target <- guessTarget "test_main.hs" Nothing;
>
> setTargets [target];
>
> .... }
>
> In the second argument of `($)', namely
>
> `do { runGhc (Just libdir)
>
> $ do { dflags <- getSessionDynFlags;
>
> setSessionDynFlags dflags;
>
> .... } }'
>
> In the expression:
>
> defaultErrorHandler defaultLogAction
>
> $ do { runGhc (Just libdir)
>
> $ do { dflags <- getSessionDynFlags;
>
> setSessionDynFlags dflags;
>
> .... } }
>
>
>
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