X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FHeaderInfo.hs;h=4988d2eea1e3ca84e932536d38582ee2de1021cd;hb=f0aa996dfa9e14d25cf1ff579e2c2932f8f63bbe;hp=e124e3755b387ab4b9f6d5cbdf624ecc5eea76ab;hpb=6e2021202c3eec0c95a9d0b7c355559f2630d380;p=ghc-hetmet.git

diff --git a/compiler/main/HeaderInfo.hs b/compiler/main/HeaderInfo.hs
index e124e37..4988d2e 100644
--- a/compiler/main/HeaderInfo.hs
+++ b/compiler/main/HeaderInfo.hs
@@ -22,8 +22,8 @@ import Module		( ModuleName, moduleName )
 import PrelNames        ( gHC_PRIM, mAIN_NAME )
 import StringBuffer	( StringBuffer(..), hGetStringBuffer, hGetStringBufferBlock
                         , appendStringBuffers )
+import Config
 import SrcLoc
-import FastString	( mkFastString )
 import DynFlags
 import ErrUtils
 import Util
@@ -33,8 +33,6 @@ import Panic
 import Maybes
 import Bag		( emptyBag, listToBag )
 
-import Distribution.Compiler
-
 import Control.Exception
 import Control.Monad
 import System.Exit
@@ -177,11 +175,13 @@ getOptions' buf filename
 
 checkExtension :: Located FastString -> Located String
 checkExtension (L l ext)
-    = case reads (unpackFS ext) of
-        [] -> languagePragParseError l
-        (okExt,""):_ -> case extensionsToGHCFlag [okExt] of
-                          ([],[opt]) -> L l opt
-                          _ -> unsupportedExtnError l okExt
+-- Checks if a given extension is valid, and if so returns
+-- its corresponding flag. Otherwise it throws an exception.
+ =  let ext' = unpackFS ext in
+    if ext' `elem` supportedLanguages
+       || ext' `elem` (map ("No"++) supportedLanguages)
+    then L l ("-X"++ext')
+    else unsupportedExtnError l ext'
 
 languagePragParseError loc =
   pgmError (showSDoc (mkLocMessage loc (