Use OPTIONS rather than OPTIONS_GHC for pragmas

[ghc-hetmet.git] / compiler / main / HeaderInfo.hs

diff --git a/compiler/main/HeaderInfo.hs b/compiler/main/HeaderInfo.hs
index 233ed1c..334da82 100644 (file)
--- a/compiler/main/HeaderInfo.hs
+++ b/compiler/main/HeaderInfo.hs
@@ -8,6 +8,13 @@
 --
 -----------------------------------------------------------------------------
 
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+-- for details
+
 module HeaderInfo ( getImportsFromFile, getImports
                   , getOptionsFromFile, getOptions
                   , optionsErrorMsgs ) where
@@ -22,6 +29,7 @@ import Module         ( ModuleName, moduleName )
 import PrelNames        ( gHC_PRIM, mAIN_NAME )
 import StringBuffer    ( StringBuffer(..), hGetStringBuffer, hGetStringBufferBlock
                         , appendStringBuffers )
+import Config
 import SrcLoc
 import DynFlags
 import ErrUtils
@@ -32,8 +40,6 @@ import Panic
 import Maybes
 import Bag             ( emptyBag, listToBag )
 
-import Distribution.Compiler
-
 import Control.Exception
 import Control.Monad
 import System.Exit
@@ -176,11 +182,13 @@ 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 (
@@ -189,7 +197,7 @@ languagePragParseError loc =
 unsupportedExtnError loc unsup =
   pgmError (showSDoc (mkLocMessage loc (
                 text "unsupported extension: " <>
-                (text.show) unsup)))
+                text unsup)))
 
 
 optionsErrorMsgs :: [String] -> [Located String] -> FilePath -> Messages