Also add language options when resolving components

Language/Haskell/GhcMod/CabalHelper.hs

@@ -76,13 +76,18 @@ cabalHelperCache = Cached {
     cacheFile = cabalHelperCacheFile,
     cachedAction = \ _ (progs, root, _) ->
       runQuery' progs root $ do
-        q <- liftM4 join4 ghcOptions ghcSrcOptions entrypoints sourceDirs
-        let cs = flip map q $ \(cn, (opts, (srcOpts, (ep, srcDirs)))) ->
-                   GmComponent cn opts srcOpts ep ep srcDirs mempty
+        q <- liftM5 join5
+               ghcOptions
+               ghcSrcOptions
+               ghcLangOptions
+               entrypoints
+               sourceDirs
+        let cs = flip map q $ \(cn, (opts, (srcOpts, (langOpts, (ep, srcDirs))))) ->
+                   GmComponent cn opts srcOpts langOpts ep ep srcDirs mempty
         return ([setupConfigPath], cs)
   }
  where
-   join4 a b c = join' a . join' b . join' c
+   join5 a b c d = join' a . join' b . join' c . join' d
    join' :: Eq a => [(a,b)] -> [(a,c)] -> [(a,(b,c))]
    join' lb lc = [ (a, (b, c))
                 | (a, b) <- lb

Language/Haskell/GhcMod/PathsAndFiles.hs

@@ -180,6 +180,9 @@ setupConfigFile crdl = cradleRootDir crdl </> setupConfigPath
 setupConfigPath :: FilePath
 setupConfigPath = "dist/setup-config" -- localBuildInfoFile defaultDistPref
 
+macrosHeaderPath :: FilePath
+macrosHeaderPath = "dist/build/autogen/cabal_macros.h"
+
 ghcSandboxPkgDbDir :: String
 ghcSandboxPkgDbDir =
    cabalBuildPlatform ++ "-ghc-" ++ cProjectVersion ++ "-packages.conf.d"

Language/Haskell/GhcMod/Target.hs

@@ -260,18 +260,26 @@ resolveGmComponent :: (IOish m, GmLog m, GmEnv m)
     -> GmComponent GMCRaw (Set ModulePath)
     -> m (GmComponent GMCResolved (Set ModulePath))
 resolveGmComponent mums c@GmComponent {..} = do
-  withLightHscEnv gmcGhcSrcOpts $ \env -> do
+  withLightHscEnv ghcOpts $ \env -> do
     let srcDirs = if null gmcSourceDirs then [""] else gmcSourceDirs
     let mg = gmcHomeModuleGraph
     let simp = gmcEntrypoints
     sump <- case mums of
         Nothing -> return simp
-        Just ums -> Set.fromList . catMaybes <$> mapM (resolveModule env srcDirs) ums
+        Just ums ->
+            Set.fromList . catMaybes <$>
+               mapM (resolveModule env srcDirs) ums
 
     mg' <- canonicalizeModuleGraph =<< updateHomeModuleGraph env mg simp sump
 
     return $ c { gmcEntrypoints = simp, gmcHomeModuleGraph = mg' }
 
+ where ghcOpts = concat [
+           gmcGhcSrcOpts,
+           gmcGhcLangOpts,
+           [ "-optP-include", "-optP" ++ macrosHeaderPath ]
+        ]
+
 resolveEntrypoint :: IOish m
     => Cradle
     -> GmComponent GMCRaw ChEntrypoint

Language/Haskell/GhcMod/Types.hs

@@ -164,7 +164,6 @@ type ModuleString = String
 -- | A Module
 type Module = [String]
 
-
 data GmLogLevel = GmPanic
                 | GmException
                 | GmError
@@ -215,6 +214,7 @@ data GmComponent (t :: GmComponentType) eps = GmComponent {
       gmcName            :: ChComponentName,
       gmcGhcOpts         :: [GHCOption],
       gmcGhcSrcOpts      :: [GHCOption],
+      gmcGhcLangOpts     :: [GHCOption],
       gmcRawEntrypoints  :: ChEntrypoint,
       gmcEntrypoints     :: eps,
       gmcSourceDirs      :: [FilePath],

ghc-mod.cabal

@@ -121,7 +121,7 @@ Library
                       , bytestring
                       , cereal >= 0.4
                       , containers
-                      , cabal-helper >= 0.3.1.0
+                      , cabal-helper >= 0.3.2.0
                       , deepseq
                       , directory
                       , filepath