Massive patch for the first months work adding System FC to GHC #35

[ghc-hetmet.git] / utils / hsc2hs / Main.hs

diff --git a/utils/hsc2hs/Main.hs b/utils/hsc2hs/Main.hs
index 9f202fd..75ea57b 100644 (file)
--- a/utils/hsc2hs/Main.hs
+++ b/utils/hsc2hs/Main.hs
@@ -13,7 +13,7 @@
 #include "../../includes/ghcconfig.h"
 #endif
 
-#if __GLASGOW_HASKELL__ >= 504 || __NHC__ >= 114 || __HUGS__
+#if __GLASGOW_HASKELL__ >= 504 || __NHC__ >= 114
 import System.Console.GetOpt
 #else
 import GetOpt
@@ -24,9 +24,9 @@ import Directory     (removeFile,doesFileExist)
 import Monad         (MonadPlus(..), liftM, liftM2, when)
 import Char          (isAlpha, isAlphaNum, isSpace, isDigit, toUpper, intToDigit, ord)
 import List          (intersperse, isSuffixOf)
-import IO            (hPutStr, hPutStrLn, stderr)
+import IO            (hPutStr, hPutStrLn, stderr, bracket_)
 
-#if defined(mingw32_HOST_OS) && !__HUGS__
+#if defined(mingw32_HOST_OS)
 import Foreign
 #if __GLASGOW_HASKELL__ >= 504 || __NHC__ >= 114
 import Foreign.C.String
@@ -44,14 +44,14 @@ import System.IO                ( openFile, IOMode(..), hClose )
 #if defined(__GLASGOW_HASKELL__) && !defined(BUILD_NHC)
 import Compat.RawSystem        ( rawSystem )
 #define HAVE_rawSystem
-#elif __HUGS__ || __NHC__ >= 117
+#elif __NHC__ >= 117
 import System.Cmd              ( rawSystem )
 #define HAVE_rawSystem
 #endif
 
 #if !defined(HAVE_runProcess) || !defined(HAVE_rawSystem)
 -- we need system
-#if __HUGS__ || __NHC__ >= 117 || __GLASGOW_HASKELL__ >= 600
+#if __NHC__ >= 117 || __GLASGOW_HASKELL__ >= 600
 import System.Cmd              ( system )
 #else
 import System                   ( system )
@@ -132,11 +132,7 @@ main = do
     flags_w_tpl <- if any template_flag flags then
                        return flags
                   else
-#ifdef __HUGS__
-                       do mb_path <- getExecDir "/Main.hs"
-#else
                        do mb_path <- getExecDir "/bin/hsc2hs.exe"
-#endif
                           add_opt <-
                            case mb_path of
                              Nothing   -> return id
@@ -548,17 +544,6 @@ output flags name toks = do
             fixChar c | isAlphaNum c = toUpper c
                       | otherwise    = '_'
 
-#ifdef __HUGS__
-    compiler <- case [c | Compiler c <- flags] of
-        []  -> return "gcc"
-        [c] -> return c
-        _   -> onlyOne "compiler"
-
-    linker <- case [l | Linker l <- flags] of
-        []  -> return compiler
-        [l] -> return l
-        _   -> onlyOne "linker"
-#else
         -- Try locating GHC..on Win32, look in the vicinity of hsc2hs.
        -- Returns a native-format path
         locateGhc def = do
@@ -591,7 +576,6 @@ output flags name toks = do
         []  -> locateGhc compiler
         [l] -> return l
         _   -> onlyOne "linker"
-#endif
 
     writeFile cProgName $
         concatMap outFlagHeaderCProg flags++
@@ -613,17 +597,17 @@ output flags name toks = do
         ++ [cProgName]
         ++ ["-o", oProgName]
        )
-    removeFile cProgName
+    finallyRemove cProgName $ do
 
     rawSystemL ("linking " ++ oProgName) beVerbose linker
         (  [f | LinkFlag f <- flags]
         ++ [oProgName]
         ++ ["-o", progName]
        )
-    removeFile oProgName
+    finallyRemove oProgName $ do
 
     rawSystemWithStdOutL ("running " ++ execProgName) beVerbose execProgName [] outName
-    removeFile progName
+    finallyRemove progName $ do
 
     when needsH $ writeFile outHName $
         "#ifndef "++includeGuard++"\n" ++
@@ -675,6 +659,19 @@ rawSystemWithStdOutL action flg prog args outFile = do
     ExitFailure _ -> die $ action ++ " failed\ncommand was: " ++ cmdLine ++ "\n"
     _             -> return ()
 
+
+-- delay the cleanup of generated files until the end; attempts to
+-- get around intermittent failure to delete files which has
+-- just been exec'ed by a sub-process (Win32 only.)
+finallyRemove :: FilePath -> IO a -> IO a
+finallyRemove fp act = 
+  bracket_ (return fp)
+           (const $ noisyRemove fp)
+           act
+ where
+  noisyRemove fpath =
+    catch (removeFile fpath)
+          (\ e -> hPutStrLn stderr ("Failed to remove file " ++ fpath ++ "; error= " ++ show e))
 onlyOne :: String -> IO a
 onlyOne what = die ("Only one "++what++" may be specified\n")
 
@@ -909,9 +906,7 @@ getExecDir cmd =
           removeCmdSuffix = return . Just . initN (length cmd) . unDosifyPath
 
 getExecPath :: IO (Maybe String)
-#if defined(__HUGS__)
-getExecPath = liftM Just getProgName
-#elif defined(mingw32_HOST_OS)
+#if defined(mingw32_HOST_OS)
 getExecPath =
      allocaArray len $ \buf -> do
          ret <- getModuleFileName nullPtr buf len