X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fmain%2FErrUtils.lhs;h=a0a9f0e3b39369000c92402de5aacec901ee3d5e;hp=b6297a2d6d163da49365c617f6da2fb4d7590e5d;hb=86add45dbfb6f962b65e371143dd467ae783f9e7;hpb=4e6bac1ec5a0546584c945c3232863d117496d90

diff --git a/compiler/main/ErrUtils.lhs b/compiler/main/ErrUtils.lhs
index b6297a2..a0a9f0e 100644
--- a/compiler/main/ErrUtils.lhs
+++ b/compiler/main/ErrUtils.lhs
@@ -41,6 +41,9 @@ import StaticFlags	( opt_ErrorSpans )
 
 import System.Exit	( ExitCode(..), exitWith )
 import Data.List
+import qualified Data.Set as Set
+import Data.IORef
+import Control.Monad
 import System.IO
 
 -- -----------------------------------------------------------------------------
@@ -187,11 +190,11 @@ dumpIfSet_dyn dflags flag hdr doc
   = return ()
 
 dumpIfSet_dyn_or :: DynFlags -> [DynFlag] -> String -> SDoc -> IO ()
-dumpIfSet_dyn_or dflags flags hdr doc
-  | or [dopt flag dflags | flag <- flags]
-  || verbosity dflags >= 4 
-  = printDump (mkDumpDoc hdr doc)
-  | otherwise = return ()
+dumpIfSet_dyn_or _ [] _ _ = return ()
+dumpIfSet_dyn_or dflags (flag : flags) hdr doc
+    = if dopt flag dflags || verbosity dflags >= 4
+      then dumpSDoc dflags flag hdr doc
+      else dumpIfSet_dyn_or dflags flags hdr doc
 
 mkDumpDoc :: String -> SDoc -> SDoc
 mkDumpDoc hdr doc 
@@ -208,19 +211,26 @@ mkDumpDoc hdr doc
 --	otherwise emit to stdout.
 dumpSDoc :: DynFlags -> DynFlag -> String -> SDoc -> IO ()
 dumpSDoc dflags dflag hdr doc
- = do	let mFile	= chooseDumpFile dflags dflag
- 	case mFile of
-		-- write the dump to a file
-		--	don't add the header in this case, we can see what kind
-		--	of dump it is from the filename.
-		Just fileName
-		 -> do	handle	<- openFile fileName AppendMode
-		 	hPrintDump handle doc
-		 	hClose handle
-
-		-- write the dump to stdout
-		Nothing
-		 -> do	printDump (mkDumpDoc hdr doc)
+ = do let mFile = chooseDumpFile dflags dflag
+      case mFile of
+            -- write the dump to a file
+            -- don't add the header in this case, we can see what kind
+            -- of dump it is from the filename.
+            Just fileName
+                 -> do
+                        let gdref = generatedDumps dflags
+                        gd <- readIORef gdref
+                        let append = Set.member fileName gd
+                            mode = if append then AppendMode else WriteMode
+                        when (not append) $
+                            writeIORef gdref (Set.insert fileName gd)
+                        handle <- openFile fileName mode
+                        hPrintDump handle doc
+                        hClose handle
+
+            -- write the dump to stdout
+            Nothing
+                 -> printDump (mkDumpDoc hdr doc)
 
 
 -- | Choose where to put a dump file based on DynFlags