Merge master into the ghc-new-co branch

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

diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs
index c7e0465..cdbaa53 100644 (file)
--- a/compiler/main/DynFlags.hs
+++ b/compiler/main/DynFlags.hs
@@ -358,6 +358,7 @@ data ExtensionFlag
    | Opt_KindSignatures
    | Opt_ParallelListComp
    | Opt_TransformListComp
+   | Opt_MonadComprehensions
    | Opt_GeneralizedNewtypeDeriving
    | Opt_RecursiveDo
    | Opt_DoRec
@@ -807,7 +808,7 @@ defaultDynFlags mySettings =
                           SevOutput -> printOutput (msg style)
                           SevInfo   -> printErrs (msg style)
                           SevFatal  -> printErrs (msg style)
-                          _         -> do 
+                          _         -> do
                                 hPutChar stderr '\n'
                                 printErrs ((mkLocMessage srcSpan msg) style)
                      -- careful (#2302): printErrs prints in UTF-8, whereas
@@ -1102,12 +1103,13 @@ parseDynamicFlags_ dflags0 args pkg_flags = do
   when (not (null errs)) $ ghcError $ errorsToGhcException errs
 
   let (pic_warns, dflags2)
-        | not (cTargetArch == X86_64 && cTargetOS == Linux) &&
+        | not (cTargetArch == X86_64 && (cTargetOS == Linux || cTargetOS == OSX)) &&
           (not opt_Static || opt_PIC) &&
           hscTarget dflags1 == HscLlvm
-        = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
-                       ++ "dynamic on this platform;\n"
-                       ++ "         using " ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
+        = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and "
+                       ++ "-dynamic on this platform;\n"
+                       ++ "         using "
+                       ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
                 dflags1{ hscTarget = defaultObjectTarget })
         | otherwise = ([], dflags1)
 
@@ -1620,6 +1622,7 @@ xFlags = [
   ( "EmptyDataDecls",                   Opt_EmptyDataDecls, nop ),
   ( "ParallelListComp",                 Opt_ParallelListComp, nop ),
   ( "TransformListComp",                Opt_TransformListComp, nop ),
+  ( "MonadComprehensions",              Opt_MonadComprehensions, nop),
   ( "ForeignFunctionInterface",         Opt_ForeignFunctionInterface, nop ),
   ( "UnliftedFFITypes",                 Opt_UnliftedFFITypes, nop ),
   ( "GHCForeignImportPrim",             Opt_GHCForeignImportPrim, nop ),
@@ -1628,9 +1631,9 @@ xFlags = [
   ( "RankNTypes",                       Opt_RankNTypes, nop ),
   ( "ImpredicativeTypes",               Opt_ImpredicativeTypes, nop), 
   ( "TypeOperators",                    Opt_TypeOperators, nop ),
-  ( "RecursiveDo",                      Opt_RecursiveDo,
+  ( "RecursiveDo",                      Opt_RecursiveDo,     -- Enables 'mdo'
     deprecatedForExtension "DoRec"),
-  ( "DoRec",                            Opt_DoRec, nop ),
+  ( "DoRec",                            Opt_DoRec, nop ),    -- Enables 'rec' keyword 
   ( "Arrows",                           Opt_Arrows, nop ),
   ( "ParallelArrays",                   Opt_ParallelArrays, nop ),
   ( "TemplateHaskell",                  Opt_TemplateHaskell, checkTemplateHaskellOk ),
@@ -1988,14 +1991,13 @@ forceRecompile :: DynP ()
 -- recompiled which probably isn't what you want
 forceRecompile = do { dfs <- liftEwM getCmdLineState
                    ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
-       where
+        where
          force_recomp dfs = isOneShot (ghcMode dfs)
 
 setVerboseCore2Core :: DynP ()
 setVerboseCore2Core = do forceRecompile
                          setDynFlag Opt_D_verbose_core2core 
                          upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
-                        
 
 setDumpSimplPhases :: String -> DynP ()
 setDumpSimplPhases s = do forceRecompile
@@ -2039,11 +2041,28 @@ setTarget l = upd set
 -- not from bytecode to object-code.  The idea is that -fasm/-fllvm
 -- can be safely used in an OPTIONS_GHC pragma.
 setObjTarget :: HscTarget -> DynP ()
-setObjTarget l = upd set
+setObjTarget l = updM set
   where
-   set dfs
-     | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
-     | otherwise = dfs
+   set dflags
+     | isObjectTarget (hscTarget dflags)
+       = case l of
+         HscC
+          | cGhcUnregisterised /= "YES" ->
+             do addWarn ("Compiler not unregisterised, so ignoring " ++
+                         showHscTargetFlag l)
+                return dflags
+         HscAsm
+          | cGhcWithNativeCodeGen /= "YES" ->
+             do addWarn ("Compiler has no native codegen, so ignoring " ++
+                         showHscTargetFlag l)
+                return dflags
+         HscLlvm
+          | cGhcUnregisterised == "YES" ->
+             do addWarn ("Compiler unregisterised, so ignoring " ++
+                         showHscTargetFlag l)
+                return dflags
+         _ -> return $ dflags { hscTarget = l }
+     | otherwise = return dflags
 
 setOptLevel :: Int -> DynFlags -> DynP DynFlags
 setOptLevel n dflags
@@ -2112,7 +2131,6 @@ addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> D
 addImportPath "" = upd (\s -> s{importPaths = []})
 addImportPath p  = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
 
-
 addLibraryPath p =
   upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})