X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FMain.hs;h=758451f6f31e2c1a82eb1aaa3c65df5026ef8ffa;hb=80ce44f764633347ea15b570e3f758b6e7aecd63;hp=971eb3500c303e296f48b2d6d8b9eb9882a175af;hpb=ee565d464248078a4f2d46f98667aa4fcdc56db4;p=ghc-hetmet.git

diff --git a/compiler/main/Main.hs b/compiler/main/Main.hs
index 971eb35..758451f 100644
--- a/compiler/main/Main.hs
+++ b/compiler/main/Main.hs
@@ -18,7 +18,8 @@ import GHC		( Session, DynFlags(..), GhcMode(..), HscTarget(..),
 import CmdLineParser
 
 -- Implementations of the various modes (--show-iface, mkdependHS. etc.)
-import MkIface		( showIface )
+import LoadIface	( showIface )
+import HscMain          ( newHscEnv )
 import DriverPipeline	( oneShot, compileFile )
 import DriverMkDepend	( doMkDependHS )
 #ifdef GHCI
@@ -27,26 +28,27 @@ import InteractiveUI	( ghciWelcomeMsg, interactiveUI )
 
 -- Various other random stuff that we need
 import Config		( cProjectVersion, cBooterVersion, cProjectName )
-import Packages		( dumpPackages, initPackages )
+import Packages		( dumpPackages )
 import DriverPhases	( Phase(..), isSourceFilename, anyHsc,
 			  startPhase, isHaskellSrcFilename )
-import StaticFlags	( staticFlags, v_Ld_inputs, parseStaticFlags )
+import StaticFlags
 import DynFlags         ( defaultDynFlags )
 import BasicTypes	( failed )
-import ErrUtils		( Message, debugTraceMsg, putMsg )
+import ErrUtils		( putMsg )
 import FastString	( getFastStringTable, isZEncoded, hasZEncoding )
 import Outputable
 import Util
 import Panic
 
 -- Standard Haskell libraries
-import EXCEPTION	( throwDyn )
-import IO
-import Directory	( doesDirectoryExist )
-import System		( getArgs, exitWith, ExitCode(..) )
-import Monad
-import List
-import Maybe
+import Control.Exception ( throwDyn )
+import System.IO
+import System.Directory	( doesDirectoryExist )
+import System.Environment
+import System.Exit
+import Control.Monad
+import Data.List
+import Data.Maybe
 
 -----------------------------------------------------------------------------
 -- ToDo:
@@ -76,6 +78,18 @@ main =
   -- 2. Parse the "mode" flags (--make, --interactive etc.)
   (cli_mode, argv3) <- parseModeFlags argv2
 
+  -- If all we want to do is to show the version number then do it
+  -- now, before we start a GHC session etc.
+  -- If we do it later then bootstrapping gets confused as it tries
+  -- to find out what version of GHC it's using before package.conf
+  -- exists, so starting the session fails.
+  case cli_mode of
+    ShowVersion     -> do showVersion
+                          exitWith ExitSuccess
+    ShowNumVersion  -> do putStrLn cProjectVersion
+                          exitWith ExitSuccess
+    _               -> return ()
+
   let mode = case cli_mode of
 		DoInteractive	-> Interactive
 		DoEval _	-> Interactive
@@ -143,16 +157,16 @@ main =
 
 	---------------- Do the business -----------
   case cli_mode of
-	ShowUsage       -> showGhcUsage dflags cli_mode
-	PrintLibdir     -> putStrLn (topDir dflags)
-	ShowVersion     -> showVersion
-        ShowNumVersion  -> putStrLn cProjectVersion
-        ShowInterface f -> showIface f
-	DoMake 	        -> doMake session srcs
-	DoMkDependHS    -> doMkDependHS session (map fst srcs)
-	StopBefore p    -> oneShot dflags p srcs
-	DoInteractive   -> interactiveUI session srcs Nothing
-	DoEval expr     -> interactiveUI session srcs (Just expr)
+    ShowUsage       -> showGhcUsage dflags cli_mode
+    PrintLibdir     -> putStrLn (topDir dflags)
+    ShowVersion     -> panic "ShowVersion should already have been handled"
+    ShowNumVersion  -> panic "ShowNumVersion should already have been handled"
+    ShowInterface f -> doShowIface dflags f
+    DoMake          -> doMake session srcs
+    DoMkDependHS    -> doMkDependHS session (map fst srcs)
+    StopBefore p    -> oneShot dflags p srcs
+    DoInteractive   -> interactiveUI session srcs Nothing
+    DoEval expr     -> interactiveUI session srcs (Just expr)
 
   dumpFinalStats dflags
   exitWith ExitSuccess
@@ -211,9 +225,10 @@ checkOptions cli_mode dflags srcs objs = do
    when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
 
 	-- -prof and --interactive are not a good combination
-   when (notNull (wayNames dflags)  && isInterpretiveMode cli_mode) $
+   when (notNull (filter (/= WayThreaded) (wayNames dflags))
+         && isInterpretiveMode cli_mode) $
       do throwDyn (UsageError 
-                   "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
+                   "--interactive can't be used with -prof, -ticky, or -unreg.")
 	-- -ohi sanity check
    if (isJust (outputHi dflags) && 
       (isCompManagerMode cli_mode || srcs `lengthExceeds` 1))
@@ -395,6 +410,15 @@ doMake sess srcs  = do
     when (failed ok_flag) (exitWith (ExitFailure 1))
     return ()
 
+
+-- ---------------------------------------------------------------------------
+-- --show-iface mode
+
+doShowIface :: DynFlags -> FilePath -> IO ()
+doShowIface dflags file = do
+  hsc_env <- newHscEnv dflags
+  showIface hsc_env file
+
 -- ---------------------------------------------------------------------------
 -- Various banners and verbosity output.