Fix CodingStyle#Warnings URLs
[ghc-hetmet.git] / compiler / main / DynFlags.hs
index 28943ab..13a5cba 100644 (file)
 --
 -----------------------------------------------------------------------------
 
+{-# 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/Commentary/CodingStyle#Warnings
+-- for details
+
 module DynFlags (
        -- Dynamic flags
        DynFlag(..),
@@ -47,12 +54,14 @@ module DynFlags (
         allFlags,
 
        -- misc stuff
-       machdepCCOpts, picCCOpts
+       machdepCCOpts, picCCOpts,
+    supportedLanguages,
+    compilerInfo,
   ) where
 
 #include "HsVersions.h"
 
-import Module          ( Module, mkModuleName, mkModule )
+import Module          ( Module, mkModuleName, mkModule, ModLocation )
 import PackageConfig
 import PrelNames       ( mAIN )
 #ifdef i386_TARGET_ARCH
@@ -67,7 +76,7 @@ import CmdLineParser
 import Constants       ( mAX_CONTEXT_REDUCTION_DEPTH )
 import Panic           ( panic, GhcException(..) )
 import UniqFM           ( UniqFM )
-import Util            ( notNull, splitLongestPrefix, normalisePath )
+import Util
 import Maybes          ( orElse, fromJust )
 import SrcLoc           ( SrcSpan )
 import Outputable
@@ -94,6 +103,13 @@ data DynFlag
    = Opt_D_dump_cmm
    | Opt_D_dump_cps_cmm
    | Opt_D_dump_asm
+   | Opt_D_dump_asm_native
+   | Opt_D_dump_asm_liveness
+   | Opt_D_dump_asm_coalesce
+   | Opt_D_dump_asm_regalloc
+   | Opt_D_dump_asm_regalloc_stages
+   | Opt_D_dump_asm_conflicts
+   | Opt_D_dump_asm_stats
    | Opt_D_dump_cpranal
    | Opt_D_dump_deriv
    | Opt_D_dump_ds
@@ -133,11 +149,12 @@ data DynFlag
    | Opt_D_dump_minimal_imports
    | Opt_D_dump_mod_cycles
    | Opt_D_faststring_stats
+   | Opt_DumpToFile                    -- ^ Append dump output to files instead of stdout.
    | Opt_DoCoreLinting
    | Opt_DoStgLinting
    | Opt_DoCmmLinting
 
-   | Opt_WarnIsError           -- -Werror; makes warnings fatal
+   | Opt_WarnIsError                   -- -Werror; makes warnings fatal
    | Opt_WarnDuplicateExports
    | Opt_WarnHiShadows
    | Opt_WarnImplicitPrelude
@@ -160,17 +177,17 @@ data DynFlag
    | Opt_WarnTabs
 
    -- language opts
-   | Opt_AllowOverlappingInstances
-   | Opt_AllowUndecidableInstances
-   | Opt_AllowIncoherentInstances
+   | Opt_OverlappingInstances
+   | Opt_UndecidableInstances
+   | Opt_IncoherentInstances
    | Opt_MonomorphismRestriction
    | Opt_MonoPatBinds
    | Opt_ExtendedDefaultRules          -- Use GHC's extended rules for defaulting
-   | Opt_FFI
+   | Opt_ForeignFunctionInterface
    | Opt_UnliftedFFITypes
    | Opt_PArr                          -- Syntactic support for parallel arrays
    | Opt_Arrows                                -- Arrow-notation syntax
-   | Opt_TH
+   | Opt_TemplateHaskell
    | Opt_ImplicitParams
    | Opt_Generics
    | Opt_ImplicitPrelude 
@@ -183,7 +200,7 @@ data DynFlag
    | Opt_RecordWildCards
    | Opt_RecordPuns
    | Opt_GADTs
-   | Opt_RelaxedPolyRec                        -- -X=RelaxedPolyRec
+   | Opt_RelaxedPolyRec
    | Opt_StandaloneDeriving
    | Opt_DeriveDataTypeable
    | Opt_TypeSynonymInstances
@@ -227,6 +244,7 @@ data DynFlag
    | Opt_DictsCheap
    | Opt_RewriteRules
    | Opt_Vectorise
+   | Opt_RegsGraph
 
    -- misc opts
    | Opt_Cpp
@@ -244,6 +262,8 @@ data DynFlag
    | Opt_Haddock
    | Opt_Hpc_No_Auto
    | Opt_BreakOnException
+   | Opt_GenManifest
+   | Opt_EmbedManifest
 
    -- keeping stuff
    | Opt_KeepHiDiffs
@@ -252,7 +272,7 @@ data DynFlag
    | Opt_KeepRawSFiles
    | Opt_KeepTmpFiles
 
-   deriving (Eq)
+   deriving (Eq, Show)
  
 data DynFlags = DynFlags {
   ghcMode              :: GhcMode,
@@ -295,6 +315,14 @@ data DynFlags = DynFlags {
   outputFile           :: Maybe String,
   outputHi             :: Maybe String,
 
+  -- | This is set by DriverPipeline.runPipeline based on where
+  --   its output is going.
+  dumpPrefix           :: Maybe FilePath,
+
+  -- | Override the dumpPrefix set by runPipeline.
+  --   Set by -ddump-file-prefix
+  dumpPrefixForce      :: Maybe FilePath,
+
   includePaths         :: [String],
   libraryPaths         :: [String],
   frameworkPaths       :: [String],    -- used on darwin only
@@ -314,8 +342,8 @@ data DynFlags = DynFlags {
   opt_m                        :: [String],
   opt_a                        :: [String],
   opt_l                        :: [String],
-  opt_dll              :: [String],
   opt_dep              :: [String],
+  opt_windres          :: [String],
 
   -- commands for particular phases
   pgm_L                        :: String,
@@ -329,6 +357,7 @@ data DynFlags = DynFlags {
   pgm_dll              :: (String,[Option]),
   pgm_T                 :: String,
   pgm_sysman            :: String,
+  pgm_windres           :: String,
 
   --  Package flags
   extraPkgConfs                :: [FilePath],
@@ -453,6 +482,8 @@ defaultDynFlags =
 
        outputFile              = Nothing,
        outputHi                = Nothing,
+       dumpPrefix              = Nothing,
+       dumpPrefixForce         = Nothing,
        includePaths            = [],
        libraryPaths            = [],
        frameworkPaths          = [],
@@ -462,14 +493,16 @@ defaultDynFlags =
         hpcDir                 = ".hpc",
 
        opt_L                   = [],
-       opt_P                   = [],
+       opt_P                   = (if opt_PIC
+                                  then ["-D__PIC__"]
+                                  else []),
        opt_F                   = [],
        opt_c                   = [],
        opt_a                   = [],
        opt_m                   = [],
        opt_l                   = [],
-       opt_dll                 = [],
        opt_dep                 = [],
+        opt_windres             = [],
        
        extraPkgConfs           = [],
        packageFlags            = [],
@@ -487,6 +520,9 @@ defaultDynFlags =
 
            Opt_DoAsmMangling,
     
+            Opt_GenManifest,
+            Opt_EmbedManifest,
+
            -- on by default:
            Opt_PrintBindResult ]
            ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
@@ -540,6 +576,8 @@ setHcSuf      f d = d{ hcSuf      = f}
 setOutputFile f d = d{ outputFile = f}
 setOutputHi   f d = d{ outputHi   = f}
 
+setDumpPrefixForce f d = d { dumpPrefixForce = f}
+
 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
 -- Config.hs should really use Option.
 setPgmP   f d = let (pgm:args) = words f in d{ pgm_P   = (pgm, map Option args)}
@@ -552,6 +590,7 @@ setPgms   f d = d{ pgm_s   = (f,[])}
 setPgma   f d = d{ pgm_a   = (f,[])}
 setPgml   f d = d{ pgm_l   = (f,[])}
 setPgmdll f d = d{ pgm_dll = (f,[])}
+setPgmwindres f d = d{ pgm_windres = f}
 
 addOptL   f d = d{ opt_L   = f : opt_L d}
 addOptP   f d = d{ opt_P   = f : opt_P d}
@@ -560,8 +599,8 @@ addOptc   f d = d{ opt_c   = f : opt_c d}
 addOptm   f d = d{ opt_m   = f : opt_m d}
 addOpta   f d = d{ opt_a   = f : opt_a d}
 addOptl   f d = d{ opt_l   = f : opt_l d}
-addOptdll f d = d{ opt_dll = f : opt_dll d}
 addOptdep f d = d{ opt_dep = f : opt_dep d}
+addOptwindres f d = d{ opt_windres = f : opt_windres d}
 
 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
 
@@ -650,6 +689,16 @@ minusWallOpts
        Opt_WarnOrphans
       ]
 
+-- minuswRemovesOpts should be every warning option
+minuswRemovesOpts
+    = minusWallOpts ++
+      [Opt_WarnImplicitPrelude,
+       Opt_WarnIncompletePatternsRecUpd,
+       Opt_WarnSimplePatterns,
+       Opt_WarnMonomorphism,
+       Opt_WarnTabs
+      ]
+
 -- -----------------------------------------------------------------------------
 -- CoreToDo:  abstraction of core-to-core passes to run.
 
@@ -892,6 +941,7 @@ dynamic_flags = [
   ,  ( "pgma"           , HasArg (upd . setPgma) )  
   ,  ( "pgml"           , HasArg (upd . setPgml) )  
   ,  ( "pgmdll"                , HasArg (upd . setPgmdll) )
+  ,  ( "pgmwindres"     , HasArg (upd . setPgmwindres) )
 
   ,  ( "optL"          , HasArg (upd . addOptL) )  
   ,  ( "optP"          , HasArg (upd . addOptP) )  
@@ -900,8 +950,8 @@ dynamic_flags = [
   ,  ( "optm"          , HasArg (upd . addOptm) )  
   ,  ( "opta"          , HasArg (upd . addOpta) )  
   ,  ( "optl"          , HasArg (upd . addOptl) )  
-  ,  ( "optdll"                , HasArg (upd . addOptdll) )  
   ,  ( "optdep"                , HasArg (upd . addOptdep) )
+  ,  ( "optwindres"     , HasArg (upd . addOptwindres) )
 
   ,  ( "split-objs"    , NoArg (if can_split
                                    then setDynFlag Opt_SplitObjs
@@ -914,8 +964,7 @@ dynamic_flags = [
 
        ------- Libraries ---------------------------------------------------
   ,  ( "L"             , Prefix addLibraryPath )
-  ,  ( "l"             , AnySuffix (\s -> do upd (addOptl s)
-                                             upd (addOptdll s)))
+  ,  ( "l"             , AnySuffix (\s -> do upd (addOptl s)))
 
        ------- Frameworks --------------------------------------------------
         -- -framework-path should really be -F ...
@@ -932,6 +981,7 @@ dynamic_flags = [
   ,  ( "hidir"         , HasArg (upd . setHiDir . Just))
   ,  ( "tmpdir"                , HasArg (upd . setTmpDir))
   ,  ( "stubdir"       , HasArg (upd . setStubDir . Just))
+  ,  ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
 
        ------- Keeping temporary files -------------------------------------
      -- These can be singular (think ghc -c) or plural (think ghc --make)
@@ -978,6 +1028,14 @@ dynamic_flags = [
   ,  ( "ddump-cmm",             setDumpFlag Opt_D_dump_cmm)
   ,  ( "ddump-cps-cmm",                 setDumpFlag Opt_D_dump_cps_cmm)
   ,  ( "ddump-asm",             setDumpFlag Opt_D_dump_asm)
+  ,  ( "ddump-asm-native",       setDumpFlag Opt_D_dump_asm_native)
+  ,  ( "ddump-asm-liveness",     setDumpFlag Opt_D_dump_asm_liveness)
+  ,  ( "ddump-asm-coalesce",     setDumpFlag Opt_D_dump_asm_coalesce)
+  ,  ( "ddump-asm-regalloc",     setDumpFlag Opt_D_dump_asm_regalloc)
+  ,  ( "ddump-asm-conflicts",    setDumpFlag Opt_D_dump_asm_conflicts)
+  ,  ( "ddump-asm-regalloc-stages",
+                                 setDumpFlag Opt_D_dump_asm_regalloc_stages)
+  ,  ( "ddump-asm-stats",        setDumpFlag Opt_D_dump_asm_stats)
   ,  ( "ddump-cpranal",         setDumpFlag Opt_D_dump_cpranal)
   ,  ( "ddump-deriv",           setDumpFlag Opt_D_dump_deriv)
   ,  ( "ddump-ds",              setDumpFlag Opt_D_dump_ds)
@@ -1015,7 +1073,7 @@ dynamic_flags = [
   ,  ( "ddump-vect",            setDumpFlag Opt_D_dump_vect)
   ,  ( "ddump-hpc",             setDumpFlag Opt_D_dump_hpc)
   ,  ( "ddump-mod-cycles",              setDumpFlag Opt_D_dump_mod_cycles)
-  
+  ,  ( "ddump-to-file",          setDumpFlag Opt_DumpToFile)
   ,  ( "ddump-hi-diffs",         NoArg (setDynFlag Opt_D_dump_hi_diffs))
   ,  ( "dcore-lint",            NoArg (setDynFlag Opt_DoCoreLinting))
   ,  ( "dstg-lint",             NoArg (setDynFlag Opt_DoStgLinting))
@@ -1035,11 +1093,11 @@ dynamic_flags = [
   ,  ( "Werror"                , NoArg (setDynFlag         Opt_WarnIsError) )
   ,  ( "Wall"          , NoArg (mapM_ setDynFlag   minusWallOpts) )
   ,  ( "Wnot"          , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
-  ,  ( "w"             , NoArg (mapM_ unSetDynFlag minusWallOpts) )
+  ,  ( "w"             , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
 
        ------ Optimisation flags ------------------------------------------
   ,  ( "O"     , NoArg (upd (setOptLevel 1)))
-  ,  ( "Onot"  , NoArg (upd (setOptLevel 0)))
+  ,  ( "Onot"  , NoArg (upd (setOptLevel 0))) -- deprecated
   ,  ( "O"     , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
                -- If the number is missing, use 1
 
@@ -1055,80 +1113,117 @@ dynamic_flags = [
 
         ------ Compiler flags -----------------------------------------------
 
-  ,  ( "fasm",         NoArg (setObjTarget HscAsm) )
-  ,  ( "fvia-c",       NoArg (setObjTarget HscC) )
-  ,  ( "fvia-C",       NoArg (setObjTarget HscC) )
+  ,  ( "fasm",             NoArg (setObjTarget HscAsm) )
+  ,  ( "fvia-c",           NoArg (setObjTarget HscC) )
+  ,  ( "fvia-C",           NoArg (setObjTarget HscC) )
 
-  ,  ( "fno-code",     NoArg (setTarget HscNothing))
-  ,  ( "fbyte-code",    NoArg (setTarget HscInterpreted) )
-  ,  ( "fobject-code",  NoArg (setTarget defaultHscTarget) )
+  ,  ( "fno-code",         NoArg (setTarget HscNothing))
+  ,  ( "fbyte-code",       NoArg (setTarget HscInterpreted) )
+  ,  ( "fobject-code",     NoArg (setTarget defaultHscTarget) )
 
   ,  ( "fglasgow-exts",    NoArg (mapM_ setDynFlag   glasgowExtsFlags) )
   ,  ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
 
-       -- the rest of the -f* and -fno-* flags
-  ,  ( "f",            PrefixPred (isFlag fFlags)   (\f -> setDynFlag   (getFlag fFlags f)) )
-  ,  ( "f",            PrefixPred (isNoFlag fFlags) (\f -> unSetDynFlag (getNoFlag fFlags f)) )
-
-       -- For now, allow -X flags with -f; ToDo: report this as deprecated
-  ,  ( "f",            PrefixPred (isFlag xFlags) (\f ->  setDynFlag (getFlag xFlags f)) )
-  ,  ( "f",            PrefixPred (isNoFlag xFlags) (\f -> unSetDynFlag (getNoFlag xFlags f)) )
-
-       -- the rest of the -X* and -Xno-* flags
-  ,  ( "X",            PrefixPred (isFlag xFlags)   (\f -> setDynFlag   (getFlag xFlags f)) )
-  ,  ( "X",            PrefixPred (isNoFlag xFlags) (\f -> unSetDynFlag (getNoFlag xFlags f)) )
+     -- the rest of the -f* and -fno-* flags
+  ,  ( "f",                PrefixPred (isFlag   fFlags)
+                           (\f -> setDynFlag   (getFlag   fFlags f)) )
+  ,  ( "f",                PrefixPred (isPrefFlag "no-" fFlags)
+                           (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
+
+     -- the -X* and -XNo* flags
+  ,  ( "X",                PrefixPred (isFlag   xFlags)
+                           (\f -> setDynFlag   (getFlag   xFlags f)) )
+  ,  ( "X",                PrefixPred (isPrefFlag "No" xFlags)
+                           (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
  ]
 
 -- these -f<blah> flags can all be reversed with -fno-<blah>
 
 fFlags = [
-  ( "warn-dodgy-imports",              Opt_WarnDodgyImports ),
-  ( "warn-duplicate-exports",          Opt_WarnDuplicateExports ),
-  ( "warn-hi-shadowing",               Opt_WarnHiShadows ),
+  ( "warn-dodgy-imports",               Opt_WarnDodgyImports ),
+  ( "warn-duplicate-exports",           Opt_WarnDuplicateExports ),
+  ( "warn-hi-shadowing",                Opt_WarnHiShadows ),
   ( "warn-implicit-prelude",            Opt_WarnImplicitPrelude ),
-  ( "warn-incomplete-patterns",        Opt_WarnIncompletePatterns ),
-  ( "warn-incomplete-record-updates",          Opt_WarnIncompletePatternsRecUpd ),
-  ( "warn-missing-fields",             Opt_WarnMissingFields ),
-  ( "warn-missing-methods",            Opt_WarnMissingMethods ),
-  ( "warn-missing-signatures",         Opt_WarnMissingSigs ),
-  ( "warn-name-shadowing",             Opt_WarnNameShadowing ),
-  ( "warn-overlapping-patterns",       Opt_WarnOverlappingPatterns ),
-  ( "warn-simple-patterns",            Opt_WarnSimplePatterns ),
-  ( "warn-type-defaults",              Opt_WarnTypeDefaults ),
-  ( "warn-monomorphism-restriction",           Opt_WarnMonomorphism ),
-  ( "warn-unused-binds",               Opt_WarnUnusedBinds ),
-  ( "warn-unused-imports",             Opt_WarnUnusedImports ),
-  ( "warn-unused-matches",             Opt_WarnUnusedMatches ),
-  ( "warn-deprecations",               Opt_WarnDeprecations ),
-  ( "warn-orphans",                    Opt_WarnOrphans ),
-  ( "warn-tabs",                       Opt_WarnTabs ),
-  ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
-  ( "strictness",                      Opt_Strictness ),
-  ( "full-laziness",                   Opt_FullLaziness ),
-  ( "liberate-case",                   Opt_LiberateCase ),
-  ( "spec-constr",                     Opt_SpecConstr ),
-  ( "cse",                             Opt_CSE ),
-  ( "ignore-interface-pragmas",                Opt_IgnoreInterfacePragmas ),
-  ( "omit-interface-pragmas",          Opt_OmitInterfacePragmas ),
-  ( "do-lambda-eta-expansion",         Opt_DoLambdaEtaExpansion ),
-  ( "ignore-asserts",                  Opt_IgnoreAsserts ),
+  ( "warn-incomplete-patterns",         Opt_WarnIncompletePatterns ),
+  ( "warn-incomplete-record-updates",   Opt_WarnIncompletePatternsRecUpd ),
+  ( "warn-missing-fields",              Opt_WarnMissingFields ),
+  ( "warn-missing-methods",             Opt_WarnMissingMethods ),
+  ( "warn-missing-signatures",          Opt_WarnMissingSigs ),
+  ( "warn-name-shadowing",              Opt_WarnNameShadowing ),
+  ( "warn-overlapping-patterns",        Opt_WarnOverlappingPatterns ),
+  ( "warn-simple-patterns",             Opt_WarnSimplePatterns ),
+  ( "warn-type-defaults",               Opt_WarnTypeDefaults ),
+  ( "warn-monomorphism-restriction",    Opt_WarnMonomorphism ),
+  ( "warn-unused-binds",                Opt_WarnUnusedBinds ),
+  ( "warn-unused-imports",              Opt_WarnUnusedImports ),
+  ( "warn-unused-matches",              Opt_WarnUnusedMatches ),
+  ( "warn-deprecations",                Opt_WarnDeprecations ),
+  ( "warn-orphans",                     Opt_WarnOrphans ),
+  ( "warn-tabs",                        Opt_WarnTabs ),
+  ( "print-explicit-foralls",           Opt_PrintExplicitForalls ),
+  ( "strictness",                       Opt_Strictness ),
+  ( "full-laziness",                    Opt_FullLaziness ),
+  ( "liberate-case",                    Opt_LiberateCase ),
+  ( "spec-constr",                      Opt_SpecConstr ),
+  ( "cse",                              Opt_CSE ),
+  ( "ignore-interface-pragmas",         Opt_IgnoreInterfacePragmas ),
+  ( "omit-interface-pragmas",           Opt_OmitInterfacePragmas ),
+  ( "do-lambda-eta-expansion",          Opt_DoLambdaEtaExpansion ),
+  ( "ignore-asserts",                   Opt_IgnoreAsserts ),
   ( "ignore-breakpoints",               Opt_IgnoreBreakpoints),
-  ( "do-eta-reduction",                        Opt_DoEtaReduction ),
-  ( "case-merge",                      Opt_CaseMerge ),
-  ( "unbox-strict-fields",             Opt_UnboxStrictFields ),
-  ( "dicts-cheap",                     Opt_DictsCheap ),
-  ( "excess-precision",                        Opt_ExcessPrecision ),
-  ( "asm-mangling",                    Opt_DoAsmMangling ),
-  ( "print-bind-result",               Opt_PrintBindResult ),
-  ( "force-recomp",                    Opt_ForceRecomp ),
-  ( "hpc-no-auto",                     Opt_Hpc_No_Auto ),
-  ( "rewrite-rules",                   Opt_RewriteRules ),
+  ( "do-eta-reduction",                 Opt_DoEtaReduction ),
+  ( "case-merge",                       Opt_CaseMerge ),
+  ( "unbox-strict-fields",              Opt_UnboxStrictFields ),
+  ( "dicts-cheap",                      Opt_DictsCheap ),
+  ( "excess-precision",                 Opt_ExcessPrecision ),
+  ( "asm-mangling",                     Opt_DoAsmMangling ),
+  ( "print-bind-result",                Opt_PrintBindResult ),
+  ( "force-recomp",                     Opt_ForceRecomp ),
+  ( "hpc-no-auto",                      Opt_Hpc_No_Auto ),
+  ( "rewrite-rules",                    Opt_RewriteRules ),
   ( "break-on-exception",               Opt_BreakOnException ),
-  ( "vectorise",                        Opt_Vectorise )
+  ( "vectorise",                        Opt_Vectorise ),
+  ( "regs-graph",                       Opt_RegsGraph),
+  -- Deprecated in favour of -XTemplateHaskell:
+  ( "th",                               Opt_TemplateHaskell ),
+  -- Deprecated in favour of -XForeignFunctionInterface:
+  ( "fi",                               Opt_ForeignFunctionInterface ),
+  -- Deprecated in favour of -XForeignFunctionInterface:
+  ( "ffi",                              Opt_ForeignFunctionInterface ),
+  -- Deprecated in favour of -XArrows:
+  ( "arrows",                           Opt_Arrows ),
+  -- Deprecated in favour of -XGenerics:
+  ( "generics",                         Opt_Generics ),
+  -- Deprecated in favour of -XImplicitPrelude:
+  ( "implicit-prelude",                 Opt_ImplicitPrelude ),
+  -- Deprecated in favour of -XBangPatterns:
+  ( "bang-patterns",                    Opt_BangPatterns ),
+  -- Deprecated in favour of -XMonomorphismRestriction:
+  ( "monomorphism-restriction",         Opt_MonomorphismRestriction ),
+  -- Deprecated in favour of -XMonoPatBinds:
+  ( "mono-pat-binds",                   Opt_MonoPatBinds ),
+  -- Deprecated in favour of -XExtendedDefaultRules:
+  ( "extended-default-rules",           Opt_ExtendedDefaultRules ),
+  -- Deprecated in favour of -XImplicitParams:
+  ( "implicit-params",                  Opt_ImplicitParams ),
+  -- Deprecated in favour of -XScopedTypeVariables:
+  ( "scoped-type-variables",            Opt_ScopedTypeVariables ),
+  -- Deprecated in favour of -XPArr:
+  ( "parr",                             Opt_PArr ),
+  -- Deprecated in favour of -XOverlappingInstances:
+  ( "allow-overlapping-instances",      Opt_OverlappingInstances ),
+  -- Deprecated in favour of -XUndecidableInstances:
+  ( "allow-undecidable-instances",      Opt_UndecidableInstances ),
+  -- Deprecated in favour of -XIncoherentInstances:
+  ( "allow-incoherent-instances",       Opt_IncoherentInstances ),
+  ( "gen-manifest",                     Opt_GenManifest ),
+  ( "embed-manifest",                   Opt_EmbedManifest )
   ]
 
+supportedLanguages :: [String]
+supportedLanguages = map fst xFlags
 
--- These -X<blah> flags can all be reversed with -Xno-<blah>
+-- These -X<blah> flags can all be reversed with -XNo<blah>
 xFlags :: [(String, DynFlag)]
 xFlags = [
   ( "CPP",                              Opt_Cpp ),
@@ -1141,53 +1236,48 @@ xFlags = [
   ( "PatternSignatures",                Opt_PatternSignatures ),
   ( "EmptyDataDecls",                   Opt_EmptyDataDecls ),
   ( "ParallelListComp",                 Opt_ParallelListComp ),
-  ( "FI",                              Opt_FFI ),  -- support `-ffi'...
-  ( "FFI",                             Opt_FFI ),  -- ...and also `-fffi'
-  ( "ForeignFunctionInterface",                Opt_FFI ),
+  ( "ForeignFunctionInterface",         Opt_ForeignFunctionInterface ),
   ( "UnliftedFFITypes",                 Opt_UnliftedFFITypes ),
-
-  ( "PartiallyAppliedClosedTypeSynonyms", Opt_PartiallyAppliedClosedTypeSynonyms ),
+  ( "PartiallyAppliedClosedTypeSynonyms",
+    Opt_PartiallyAppliedClosedTypeSynonyms ),
   ( "Rank2Types",                       Opt_Rank2Types ),
   ( "RankNTypes",                       Opt_RankNTypes ),
   ( "TypeOperators",                    Opt_TypeOperators ),
   ( "RecursiveDo",                      Opt_RecursiveDo ),
-  ( "Arrows",                          Opt_Arrows ), -- arrow syntax
-  ( "Parr",                            Opt_PArr ),
-
-  ( "TH",                              Opt_TH ), -- support -fth
-  ( "TemplateHaskelll",                        Opt_TH ),
-
-  ( "Generics",                        Opt_Generics ),
-
-  ( "ImplicitPrelude",                 Opt_ImplicitPrelude ),  -- On by default
-
-  ( "RecordWildCards",                 Opt_RecordWildCards ),
-  ( "RecordPuns",                      Opt_RecordPuns ),
-  ( "DisambiguateRecordFields",                Opt_DisambiguateRecordFields ),
-
-  ( "OverloadedStrings",               Opt_OverloadedStrings ),
-  ( "GADTs",                           Opt_GADTs ),
-  ( "TypeFamilies",                    Opt_TypeFamilies ),
-  ( "BangPatterns",                    Opt_BangPatterns ),
-  ( "MonomorphismRestriction",         Opt_MonomorphismRestriction ),  -- On by default
-  ( "MonoPatBinds",                    Opt_MonoPatBinds ),             -- On by default (which is not strictly H98)
-  ( "RelaxedPolyRec",                  Opt_RelaxedPolyRec),
-  ( "ExtendedDefaultRules",            Opt_ExtendedDefaultRules ),
-  ( "ImplicitParams",                  Opt_ImplicitParams ),
-  ( "ScopedTypeVariables",             Opt_ScopedTypeVariables ),
-  ( "UnboxedTuples",                Opt_UnboxedTuples ),
-  ( "StandaloneDeriving",           Opt_StandaloneDeriving ),
-  ( "DeriveDataTypeable",           Opt_DeriveDataTypeable ),
-  ( "TypeSynonymInstances",         Opt_TypeSynonymInstances ),
-  ( "FlexibleContexts",             Opt_FlexibleContexts ),
-  ( "FlexibleInstances",            Opt_FlexibleInstances ),
-  ( "ConstrainedClassMethods",      Opt_ConstrainedClassMethods ),
-  ( "MultiParamTypeClasses",        Opt_MultiParamTypeClasses ),
-  ( "FunctionalDependencies",        Opt_FunctionalDependencies ),
-  ( "GeneralizedNewtypeDeriving",   Opt_GeneralizedNewtypeDeriving ),
-  ( "AllowOverlappingInstances",       Opt_AllowOverlappingInstances ),
-  ( "AllowUndecidableInstances",       Opt_AllowUndecidableInstances ),
-  ( "AllowIncoherentInstances",        Opt_AllowIncoherentInstances )
+  ( "Arrows",                           Opt_Arrows ),
+  ( "PArr",                             Opt_PArr ),
+  ( "TemplateHaskell",                  Opt_TemplateHaskell ),
+  ( "Generics",                         Opt_Generics ),
+  -- On by default:
+  ( "ImplicitPrelude",                  Opt_ImplicitPrelude ),
+  ( "RecordWildCards",                  Opt_RecordWildCards ),
+  ( "RecordPuns",                       Opt_RecordPuns ),
+  ( "DisambiguateRecordFields",         Opt_DisambiguateRecordFields ),
+  ( "OverloadedStrings",                Opt_OverloadedStrings ),
+  ( "GADTs",                            Opt_GADTs ),
+  ( "TypeFamilies",                     Opt_TypeFamilies ),
+  ( "BangPatterns",                     Opt_BangPatterns ),
+  -- On by default:
+  ( "MonomorphismRestriction",          Opt_MonomorphismRestriction ),
+  -- On by default (which is not strictly H98):
+  ( "MonoPatBinds",                     Opt_MonoPatBinds ),
+  ( "RelaxedPolyRec",                   Opt_RelaxedPolyRec),
+  ( "ExtendedDefaultRules",             Opt_ExtendedDefaultRules ),
+  ( "ImplicitParams",                   Opt_ImplicitParams ),
+  ( "ScopedTypeVariables",              Opt_ScopedTypeVariables ),
+  ( "UnboxedTuples",                    Opt_UnboxedTuples ),
+  ( "StandaloneDeriving",               Opt_StandaloneDeriving ),
+  ( "DeriveDataTypeable",               Opt_DeriveDataTypeable ),
+  ( "TypeSynonymInstances",             Opt_TypeSynonymInstances ),
+  ( "FlexibleContexts",                 Opt_FlexibleContexts ),
+  ( "FlexibleInstances",                Opt_FlexibleInstances ),
+  ( "ConstrainedClassMethods",          Opt_ConstrainedClassMethods ),
+  ( "MultiParamTypeClasses",            Opt_MultiParamTypeClasses ),
+  ( "FunctionalDependencies",           Opt_FunctionalDependencies ),
+  ( "GeneralizedNewtypeDeriving",       Opt_GeneralizedNewtypeDeriving ),
+  ( "OverlappingInstances",             Opt_OverlappingInstances ),
+  ( "UndecidableInstances",             Opt_UndecidableInstances ),
+  ( "IncoherentInstances",              Opt_IncoherentInstances )
   ]
 
 impliedFlags :: [(DynFlag, [DynFlag])]
@@ -1197,7 +1287,7 @@ impliedFlags = [
 
 glasgowExtsFlags = [
              Opt_PrintExplicitForalls
-                  , Opt_FFI 
+           , Opt_ForeignFunctionInterface
            , Opt_UnliftedFFITypes
                   , Opt_GADTs
                   , Opt_ImplicitParams 
@@ -1228,43 +1318,23 @@ glasgowExtsFlags = [
                   , Opt_TypeFamilies ]
 
 ------------------
-isNoFlag, isFlag :: [(String,a)] -> String -> Bool
+isFlag :: [(String,a)] -> String -> Bool
+isFlag flags f = any (\(ff,_) -> ff == f) flags
 
-isFlag flags f = is_flag flags (normaliseFlag f)
-
-isNoFlag flags no_f
-  | Just f <- noFlag_maybe (normaliseFlag no_f) = is_flag flags f
-  | otherwise                                  = False
-
-is_flag flags nf = any (\(ff,_) -> normaliseFlag ff == nf) flags
-       -- nf is normalised alreadly
+isPrefFlag :: String -> [(String,a)] -> String -> Bool
+isPrefFlag pref flags no_f
+  | Just f <- maybePrefixMatch pref no_f = isFlag flags f
+  | otherwise                            = False
 
 ------------------
-getFlag, getNoFlag :: [(String,a)] -> String -> a
-
-getFlag flags f = get_flag flags (normaliseFlag f)
+getFlag :: [(String,a)] -> String -> a
+getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
+                      (o:os) -> o
+                      []     -> panic ("get_flag " ++ f)
 
-getNoFlag flags f = get_flag flags (fromJust (noFlag_maybe (normaliseFlag f)))
-                       -- The flag should be a no-flag already
-
-get_flag flags nf = case [ opt | (ff, opt) <- flags, normaliseFlag ff == nf] of
-                       (o:os) -> o
-                       []     -> panic ("get_flag " ++ nf)
-
-------------------
-noFlag_maybe :: String -> Maybe String
--- The input is normalised already
-noFlag_maybe ('n' : 'o' : f) = Just f
-noFlag_maybe other          = Nothing
-
-normaliseFlag :: String -> String
--- Normalise a option flag by
---     * map to lower case
---     * removing hyphens
--- Thus: -X=overloaded-strings or -XOverloadedStrings
-normaliseFlag []      = []
-normaliseFlag ('-':s) = normaliseFlag s
-normaliseFlag (c:s)   = toLower c : normaliseFlag s
+getPrefFlag :: String -> [(String,a)] -> String -> a
+getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
+-- We should only be passed flags which match the prefix
 
 -- -----------------------------------------------------------------------------
 -- Parsing the dynamic flags.
@@ -1482,6 +1552,18 @@ setOptHpcDir arg  = upd $ \ d -> d{hpcDir = arg}
 -----------------------------------------------------------------------------
 -- Via-C compilation stuff
 
+-- There are some options that we need to pass to gcc when compiling
+-- Haskell code via C, but are only supported by recent versions of
+-- gcc.  The configure script decides which of these options we need,
+-- and puts them in the file "extra-gcc-opts" in $topdir, which is
+-- read before each via-C compilation.  The advantage of having these
+-- in a separate file is that the file can be created at install-time
+-- depending on the available gcc version, and even re-generated  later
+-- if gcc is upgraded.
+--
+-- The options below are not dependent on the version of gcc, only the
+-- platform.
+
 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
                              [String]) -- for registerised HC compilations
 machdepCCOpts dflags
@@ -1524,20 +1606,6 @@ machdepCCOpts dflags
 --                    , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else "" 
                      ],
                      [ "-fno-defer-pop",
-#ifdef HAVE_GCC_MNO_OMIT_LFPTR
-                       -- Some gccs are configured with
-                       -- -momit-leaf-frame-pointer on by default, and it
-                       -- apparently takes precedence over 
-                       -- -fomit-frame-pointer, so we disable it first here.
-                       "-mno-omit-leaf-frame-pointer",
-#endif
-#ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
-                       "-fno-unit-at-a-time",
-                       -- unit-at-a-time doesn't do us any good, and screws
-                       -- up -split-objs by moving the split markers around.
-                       -- It's only turned on with -O2, but put it here just
-                       -- in case someone uses -optc-O2.
-#endif
                        "-fomit-frame-pointer",
                        -- we want -fno-builtin, because when gcc inlines
                        -- built-in functions like memcpy() it tends to
@@ -1556,13 +1624,6 @@ machdepCCOpts dflags
                        -- and get in the way of -split-objs.  Another option
                        -- would be to throw them away in the mangler, but this
                        -- is easier.
-#ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
-                "-fno-unit-at-a-time",
-                       -- unit-at-a-time doesn't do us any good, and screws
-                       -- up -split-objs by moving the split markers around.
-                       -- It's only turned on with -O2, but put it here just
-                       -- in case someone uses -optc-O2.
-#endif
                 "-fno-builtin"
                        -- calling builtins like strlen() using the FFI can
                        -- cause gcc to run out of regs, so use the external
@@ -1597,15 +1658,18 @@ picCCOpts dflags
       --     in dynamic libraries.
 
     | opt_PIC
-        = ["-fno-common"]
+        = ["-fno-common", "-D__PIC__"]
     | otherwise
         = ["-mdynamic-no-pic"]
 #elif mingw32_TARGET_OS
       -- no -fPIC for Windows
+    | opt_PIC
+        = ["-D__PIC__"]
+    | otherwise
         = []
 #else
     | opt_PIC
-        = ["-fPIC"]
+        = ["-fPIC", "-D__PIC__"]
     | otherwise
         = []
 #endif
@@ -1614,18 +1678,24 @@ picCCOpts dflags
 -- Splitting
 
 can_split :: Bool
-can_split =  
-#if    defined(i386_TARGET_ARCH)     \
-    || defined(x86_64_TARGET_ARCH)   \
-    || defined(alpha_TARGET_ARCH)    \
-    || defined(hppa_TARGET_ARCH)     \
-    || defined(m68k_TARGET_ARCH)     \
-    || defined(mips_TARGET_ARCH)     \
-    || defined(powerpc_TARGET_ARCH)  \
-    || defined(rs6000_TARGET_ARCH)   \
-    || defined(sparc_TARGET_ARCH) 
-   True
-#else
-   False
-#endif
+can_split = cSplitObjs == "YES"
+
+-- -----------------------------------------------------------------------------
+-- Compiler Info
+
+compilerInfo :: [(String, String)]
+compilerInfo = [("Project name",                cProjectName),
+                ("Project version",             cProjectVersion),
+                ("Booter version",              cBooterVersion),
+                ("Stage",                       cStage),
+                ("Interface file version",      cHscIfaceFileVersion),
+                ("Have interpreter",            cGhcWithInterpreter),
+                ("Object splitting",            cSplitObjs),
+                ("Have native code generator",  cGhcWithNativeCodeGen),
+                ("Support SMP",                 cGhcWithSMP),
+                ("Unregisterised",              cGhcUnregisterised),
+                ("Tables next to code",         cGhcEnableTablesNextToCode),
+                ("Win32 DLLs",                  cEnableWin32DLLs),
+                ("RTS ways",                    cGhcRTSWays),
+                ("Leading underscore",          cLeadingUnderscore)]