X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FDriverMkDepend.hs;h=80d906c4a7c0e8b0c91ca2e94029238f877658aa;hb=1187e57fab2b5904a808ac973e5d04b91f880920;hp=f161d6408740d010dc1af72ba0666bd0df708e47;hpb=fb3a22d8d261e67742f92bf26861080ad9b774e9;p=ghc-hetmet.git

diff --git a/ghc/compiler/main/DriverMkDepend.hs b/ghc/compiler/main/DriverMkDepend.hs
index f161d64..80d906c 100644
--- a/ghc/compiler/main/DriverMkDepend.hs
+++ b/ghc/compiler/main/DriverMkDepend.hs
@@ -20,7 +20,7 @@ import HscTypes		( HscEnv, IsBootInterface, msObjFilePath, msHsFilePath )
 import Packages		( PackageIdH(..) )
 import SysTools		( newTempName )
 import qualified SysTools
-import Module		( Module, ModLocation(..), mkModule, moduleUserString,
+import Module		( Module, ModLocation(..), mkModule, 
 			  addBootSuffix_maybe )
 import Digraph		( SCC(..) )
 import Finder		( findModule, FindResult(..) )
@@ -30,19 +30,20 @@ import Panic
 import SrcLoc		( unLoc )
 import CmdLineParser
 
+#if __GLASGOW_HASKELL__ <= 408
+import Panic		( catchJust, ioErrors )
+#endif
+import ErrUtils         ( debugTraceMsg, printErrorsAndWarnings )
+
 import DATA_IOREF	( IORef, readIORef, writeIORef )
 import EXCEPTION
 
+import System		( ExitCode(..), exitWith )
 import Directory
 import IO
 import Monad            ( when )
 import Maybe            ( isJust )
 
-#if __GLASGOW_HASKELL__ <= 408
-import Panic		( catchJust, ioErrors )
-#endif
-import ErrUtils         ( debugTraceMsg )
-
 -----------------------------------------------------------------
 --
 --		The main function
@@ -59,22 +60,24 @@ doMkDependHS session srcs
 	; targets <- mapM (\s -> GHC.guessTarget s Nothing) srcs
 	; GHC.setTargets session targets
 	; excl_mods <- readIORef v_Dep_exclude_mods
-	; GHC.depanal session excl_mods
-	; mod_summaries <- GHC.getModuleGraph session
+	; r <- GHC.depanal session excl_mods True {- Allow dup roots -}
+	; case r of
+ 	    Nothing -> exitWith (ExitFailure 1)
+	    Just mod_summaries -> do {
 
 		-- Sort into dependency order
 		-- There should be no cycles
-	; let sorted = GHC.topSortModuleGraph False mod_summaries Nothing
+	  let sorted = GHC.topSortModuleGraph False mod_summaries Nothing
 
 		-- Print out the dependencies if wanted
-	; debugTraceMsg dflags 2 (showSDoc (text "Module dependencies" $$ ppr sorted))
-		
+	; debugTraceMsg dflags 2 (text "Module dependencies" $$ ppr sorted)
+
 		-- Prcess them one by one, dumping results into makefile
 		-- and complaining about cycles
 	; mapM (processDeps session excl_mods (mkd_tmp_hdl files)) sorted
 
 		-- Tidy up
-	; endMkDependHS dflags files }
+	; endMkDependHS dflags files }}
 
 -----------------------------------------------------------------
 --