2 -- Temporary, until rtsIsProfiled is fixed
8 -- (c) The University of Glasgow 2005
11 -- Most flags are dynamic flags, which means they can change from
12 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
13 -- multi-session GHC each session can be using different dynamic
14 -- flags. Dynamic flags can also be set at the prompt in GHCi.
16 -- * Dynamic flags and associated configuration types
21 flattenExtensionFlags,
22 ensureFlattenedExtensionFlags,
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
33 fFlags, fLangFlags, xFlags,
37 -- ** Manipulating DynFlags
38 defaultDynFlags, -- DynFlags
39 initDynFlags, -- DynFlags -> IO DynFlags
41 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
48 -- ** Parsing DynFlags
50 parseDynamicNoPackageFlags,
53 supportedLanguagesAndExtensions,
55 -- ** DynFlag C compiler options
56 machdepCCOpts, picCCOpts,
58 -- * Configuration of the stg-to-stg passes
62 -- * Compiler configuration suitable for display to the user
64 compilerInfo, rtsIsProfiled
67 #include "HsVersions.h"
69 #ifndef OMIT_NATIVE_CODEGEN
74 import PrelNames ( mAIN )
76 import {-# SOURCE #-} Packages (PackageState)
77 import DriverPhases ( Phase(..), phaseInputExt )
80 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
83 import Maybes ( orElse )
88 import Foreign.C ( CInt )
89 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
91 import System.IO.Unsafe ( unsafePerformIO )
93 import Control.Monad ( when )
97 import System.FilePath
98 import System.IO ( stderr, hPutChar )
100 -- -----------------------------------------------------------------------------
103 -- | Enumerates the simple on-or-off dynamic flags
109 | Opt_D_dump_cmmz_pretty
113 | Opt_D_dump_asm_native
114 | Opt_D_dump_asm_liveness
115 | Opt_D_dump_asm_coalesce
116 | Opt_D_dump_asm_regalloc
117 | Opt_D_dump_asm_regalloc_stages
118 | Opt_D_dump_asm_conflicts
119 | Opt_D_dump_asm_stats
120 | Opt_D_dump_asm_expanded
127 | Opt_D_dump_inlinings
128 | Opt_D_dump_rule_firings
129 | Opt_D_dump_occur_anal
133 | Opt_D_dump_simpl_iterations
134 | Opt_D_dump_simpl_phases
143 | Opt_D_dump_worker_wrapper
144 | Opt_D_dump_rn_trace
145 | Opt_D_dump_rn_stats
147 | Opt_D_dump_simpl_stats
148 | Opt_D_dump_tc_trace
149 | Opt_D_dump_if_trace
156 | Opt_D_verbose_core2core
157 | Opt_D_verbose_stg2stg
159 | Opt_D_dump_hi_diffs
160 | Opt_D_dump_minimal_imports
161 | Opt_D_dump_mod_cycles
162 | Opt_D_dump_view_pattern_commoning
163 | Opt_D_faststring_stats
164 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
165 | Opt_D_no_debug_output
171 | Opt_WarnIsError -- -Werror; makes warnings fatal
172 | Opt_WarnDuplicateExports
174 | Opt_WarnImplicitPrelude
175 | Opt_WarnIncompletePatterns
176 | Opt_WarnIncompletePatternsRecUpd
177 | Opt_WarnMissingFields
178 | Opt_WarnMissingImportList
179 | Opt_WarnMissingMethods
180 | Opt_WarnMissingSigs
181 | Opt_WarnNameShadowing
182 | Opt_WarnOverlappingPatterns
183 | Opt_WarnSimplePatterns
184 | Opt_WarnTypeDefaults
185 | Opt_WarnMonomorphism
186 | Opt_WarnUnusedBinds
187 | Opt_WarnUnusedImports
188 | Opt_WarnUnusedMatches
189 | Opt_WarnWarningsDeprecations
190 | Opt_WarnDeprecatedFlags
191 | Opt_WarnDodgyExports
192 | Opt_WarnDodgyImports
195 | Opt_WarnUnrecognisedPragmas
196 | Opt_WarnDodgyForeignImports
197 | Opt_WarnLazyUnliftedBindings
198 | Opt_WarnUnusedDoBind
199 | Opt_WarnWrongDoBind
200 | Opt_WarnAlternativeLayoutRuleTransitional
202 | Opt_PrintExplicitForalls
209 | Opt_StaticArgumentTransformation
213 | Opt_DoLambdaEtaExpansion
217 | Opt_UnboxStrictFields
220 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
222 | Opt_RegsGraph -- do graph coloring register allocation
223 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
226 | Opt_IgnoreInterfacePragmas
227 | Opt_OmitInterfacePragmas
228 | Opt_ExposeAllUnfoldings
231 | Opt_AutoSccsOnAllToplevs
232 | Opt_AutoSccsOnExportedToplevs
233 | Opt_AutoSccsOnIndividualCafs
240 | Opt_ExcessPrecision
241 | Opt_EagerBlackHoling
242 | Opt_ReadUserPackageConf
246 | Opt_HideAllPackages
247 | Opt_PrintBindResult
251 | Opt_BreakOnException
253 | Opt_PrintEvldWithShow
254 | Opt_PrintBindContents
257 | Opt_EmitExternalCore
259 | Opt_BuildingCabalPackage
265 | Opt_ConvertToZipCfgAndBack
266 | Opt_AutoLinkPackages
267 | Opt_ImplicitImportQualified
276 | Opt_KeepRawTokenStream
281 data Language = Haskell98 | Haskell2010
285 | Opt_OverlappingInstances
286 | Opt_UndecidableInstances
287 | Opt_IncoherentInstances
288 | Opt_MonomorphismRestriction
291 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
292 | Opt_ForeignFunctionInterface
293 | Opt_UnliftedFFITypes
294 | Opt_GHCForeignImportPrim
295 | Opt_PArr -- Syntactic support for parallel arrays
296 | Opt_Arrows -- Arrow-notation syntax
297 | Opt_TemplateHaskell
300 | Opt_Generics -- "Derivable type classes"
301 | Opt_ImplicitPrelude
302 | Opt_ScopedTypeVariables
306 | Opt_OverloadedStrings
307 | Opt_DisambiguateRecordFields
308 | Opt_RecordWildCards
314 | Opt_DoAndIfThenElse
316 | Opt_StandaloneDeriving
317 | Opt_DeriveDataTypeable
319 | Opt_DeriveTraversable
322 | Opt_TypeSynonymInstances
323 | Opt_FlexibleContexts
324 | Opt_FlexibleInstances
325 | Opt_ConstrainedClassMethods
326 | Opt_MultiParamTypeClasses
327 | Opt_FunctionalDependencies
329 | Opt_PolymorphicComponents
330 | Opt_ExistentialQuantification
334 | Opt_ParallelListComp
335 | Opt_TransformListComp
336 | Opt_GeneralizedNewtypeDeriving
339 | Opt_PostfixOperators
342 | Opt_LiberalTypeSynonyms
345 | Opt_ImpredicativeTypes
348 | Opt_NewQualifiedOperators
350 | Opt_AlternativeLayoutRule
351 | Opt_AlternativeLayoutRuleTransitional
352 | Opt_DatatypeContexts
355 -- | Contains not only a collection of 'DynFlag's but also a plethora of
356 -- information relating to the compilation of a single file or GHC session
357 data DynFlags = DynFlags {
360 hscTarget :: HscTarget,
361 hscOutName :: String, -- ^ Name of the output file
362 extCoreName :: String, -- ^ Name of the .hcr output file
363 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
364 optLevel :: Int, -- ^ Optimisation level
365 simplPhases :: Int, -- ^ Number of simplifier phases
366 maxSimplIterations :: Int, -- ^ Max simplifier iterations
367 shouldDumpSimplPhase :: Maybe String,
368 ruleCheck :: Maybe String,
369 strictnessBefore :: [Int], -- ^ Additional demand analysis
371 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
372 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
373 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
375 #ifndef OMIT_NATIVE_CODEGEN
376 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
378 stolen_x86_regs :: Int,
379 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
380 importPaths :: [FilePath],
382 mainFunIs :: Maybe String,
383 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
385 dphBackend :: DPHBackend,
387 thisPackage :: PackageId, -- ^ name of package currently being compiled
390 ways :: [Way], -- ^ Way flags from the command line
391 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
392 rtsBuildTag :: String, -- ^ The RTS \"way\"
394 -- For object splitting
395 splitInfo :: Maybe (String,Int),
398 objectDir :: Maybe String,
399 dylibInstallName :: Maybe String,
400 hiDir :: Maybe String,
401 stubDir :: Maybe String,
407 outputFile :: Maybe String,
408 outputHi :: Maybe String,
409 dynLibLoader :: DynLibLoader,
411 -- | This is set by 'DriverPipeline.runPipeline' based on where
412 -- its output is going.
413 dumpPrefix :: Maybe FilePath,
415 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
416 -- Set by @-ddump-file-prefix@
417 dumpPrefixForce :: Maybe FilePath,
419 includePaths :: [String],
420 libraryPaths :: [String],
421 frameworkPaths :: [String], -- used on darwin only
422 cmdlineFrameworks :: [String], -- ditto
423 tmpDir :: String, -- no trailing '/'
425 ghcUsagePath :: FilePath, -- Filled in by SysTools
426 ghciUsagePath :: FilePath, -- ditto
427 rtsOpts :: Maybe String,
428 rtsOptsEnabled :: RtsOptsEnabled,
430 hpcDir :: String, -- ^ Path to store the .mix files
432 -- options for particular phases
440 opt_windres :: [String],
441 opt_lo :: [String], -- LLVM: llvm optimiser
442 opt_lc :: [String], -- LLVM: llc static compiler
444 -- commands for particular phases
446 pgm_P :: (String,[Option]),
448 pgm_c :: (String,[Option]),
449 pgm_m :: (String,[Option]),
450 pgm_s :: (String,[Option]),
451 pgm_a :: (String,[Option]),
452 pgm_l :: (String,[Option]),
453 pgm_dll :: (String,[Option]),
455 pgm_sysman :: String,
456 pgm_windres :: String,
457 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
458 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
461 depMakefile :: FilePath,
462 depIncludePkgDeps :: Bool,
463 depExcludeMods :: [ModuleName],
464 depSuffixes :: [String],
467 extraPkgConfs :: [FilePath],
468 topDir :: FilePath, -- filled in by SysTools
469 systemPackageConfig :: FilePath, -- ditto
470 -- ^ The @-package-conf@ flags given on the command line, in the order
473 packageFlags :: [PackageFlag],
474 -- ^ The @-package@ and @-hide-package@ flags from the command-line
477 -- NB. do not modify this field, it is calculated by
478 -- Packages.initPackages and Packages.updatePackages.
479 pkgDatabase :: Maybe [PackageConfig],
480 pkgState :: PackageState,
483 -- These have to be IORefs, because the defaultCleanupHandler needs to
484 -- know what to clean when an exception happens
485 filesToClean :: IORef [FilePath],
486 dirsToClean :: IORef (FiniteMap FilePath FilePath),
490 language :: Maybe Language,
491 extensionFlags :: Either [OnOff ExtensionFlag]
494 -- | Message output action: use "ErrUtils" instead of this if you can
495 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
497 haddockOptions :: Maybe String
500 wayNames :: DynFlags -> [WayName]
501 wayNames = map wayName . ways
503 -- | The target code type of the compilation (if any).
505 -- Whenever you change the target, also make sure to set 'ghcLink' to
506 -- something sensible.
508 -- 'HscNothing' can be used to avoid generating any output, however, note
511 -- * This will not run the desugaring step, thus no warnings generated in
512 -- this step will be output. In particular, this includes warnings related
513 -- to pattern matching. You can run the desugarer manually using
514 -- 'GHC.desugarModule'.
516 -- * If a program uses Template Haskell the typechecker may try to run code
517 -- from an imported module. This will fail if no code has been generated
518 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
519 -- whether this might be the case and choose to either switch to a
520 -- different target or avoid typechecking such modules. (The latter may
521 -- preferable for security reasons.)
524 = HscC -- ^ Generate C code.
525 | HscAsm -- ^ Generate assembly using the native code generator.
526 | HscLlvm -- ^ Generate assembly using the llvm code generator.
527 | HscJava -- ^ Generate Java bytecode.
528 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
529 | HscNothing -- ^ Don't generate any code. See notes above.
532 -- | Will this target result in an object file on the disk?
533 isObjectTarget :: HscTarget -> Bool
534 isObjectTarget HscC = True
535 isObjectTarget HscAsm = True
536 isObjectTarget HscLlvm = True
537 isObjectTarget _ = False
539 -- | The 'GhcMode' tells us whether we're doing multi-module
540 -- compilation (controlled via the "GHC" API) or one-shot
541 -- (single-module) compilation. This makes a difference primarily to
542 -- the "Finder": in one-shot mode we look for interface files for
543 -- imported modules, but in multi-module mode we look for source files
544 -- in order to check whether they need to be recompiled.
546 = CompManager -- ^ @\-\-make@, GHCi, etc.
547 | OneShot -- ^ @ghc -c Foo.hs@
548 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
551 instance Outputable GhcMode where
552 ppr CompManager = ptext (sLit "CompManager")
553 ppr OneShot = ptext (sLit "OneShot")
554 ppr MkDepend = ptext (sLit "MkDepend")
556 isOneShot :: GhcMode -> Bool
557 isOneShot OneShot = True
558 isOneShot _other = False
560 -- | What to do in the link step, if there is one.
562 = NoLink -- ^ Don't link at all
563 | LinkBinary -- ^ Link object code into a binary
564 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
565 -- bytecode and object code).
566 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
569 isNoLink :: GhcLink -> Bool
570 isNoLink NoLink = True
573 -- Is it worth evaluating this Bool and caching it in the DynFlags value
574 -- during initDynFlags?
575 doingTickyProfiling :: DynFlags -> Bool
576 doingTickyProfiling _ = opt_Ticky
577 -- XXX -ticky is a static flag, because it implies -debug which is also
578 -- static. If the way flags were made dynamic, we could fix this.
581 = ExposePackage String
582 | ExposePackageId String
584 | IgnorePackage String
587 defaultHscTarget :: HscTarget
588 defaultHscTarget = defaultObjectTarget
590 -- | The 'HscTarget' value corresponding to the default way to create
591 -- object files on the current platform.
592 defaultObjectTarget :: HscTarget
594 | cGhcWithNativeCodeGen == "YES" = HscAsm
599 | Wrapped (Maybe String)
603 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
605 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
606 initDynFlags :: DynFlags -> IO DynFlags
607 initDynFlags dflags = do
608 -- someday these will be dynamic flags
609 ways <- readIORef v_Ways
610 refFilesToClean <- newIORef []
611 refDirsToClean <- newIORef emptyFM
614 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
615 rtsBuildTag = mkBuildTag ways,
616 filesToClean = refFilesToClean,
617 dirsToClean = refDirsToClean
620 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
621 -- and must be fully initialized by 'GHC.newSession' first.
622 defaultDynFlags :: DynFlags
625 ghcMode = CompManager,
626 ghcLink = LinkBinary,
627 hscTarget = defaultHscTarget,
633 maxSimplIterations = 4,
634 shouldDumpSimplPhase = Nothing,
636 specConstrThreshold = Just 200,
637 specConstrCount = Just 3,
638 liberateCaseThreshold = Just 200,
639 strictnessBefore = [],
641 #ifndef OMIT_NATIVE_CODEGEN
642 targetPlatform = defaultTargetPlatform,
645 cmdlineHcIncludes = [],
649 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
653 thisPackage = mainPackageId,
656 dylibInstallName = Nothing,
660 objectSuf = phaseInputExt StopLn,
661 hcSuf = phaseInputExt HCc,
664 outputFile = Nothing,
666 dynLibLoader = SystemDependent,
667 dumpPrefix = Nothing,
668 dumpPrefixForce = Nothing,
672 cmdlineFrameworks = [],
673 tmpDir = cDEFAULT_TMPDIR,
675 rtsOptsEnabled = RtsOptsSafeOnly,
681 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
694 pkgDatabase = Nothing,
695 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
696 ways = panic "defaultDynFlags: No ways",
697 buildTag = panic "defaultDynFlags: No buildTag",
698 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
700 -- initSysTools fills all these in
701 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
702 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
703 topDir = panic "defaultDynFlags: No topDir",
704 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
705 pgm_L = panic "defaultDynFlags: No pgm_L",
706 pgm_P = panic "defaultDynFlags: No pgm_P",
707 pgm_F = panic "defaultDynFlags: No pgm_F",
708 pgm_c = panic "defaultDynFlags: No pgm_c",
709 pgm_m = panic "defaultDynFlags: No pgm_m",
710 pgm_s = panic "defaultDynFlags: No pgm_s",
711 pgm_a = panic "defaultDynFlags: No pgm_a",
712 pgm_l = panic "defaultDynFlags: No pgm_l",
713 pgm_dll = panic "defaultDynFlags: No pgm_dll",
714 pgm_T = panic "defaultDynFlags: No pgm_T",
715 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
716 pgm_windres = panic "defaultDynFlags: No pgm_windres",
717 pgm_lo = panic "defaultDynFlags: No pgm_lo",
718 pgm_lc = panic "defaultDynFlags: No pgm_lc",
719 -- end of initSysTools values
721 depMakefile = "Makefile",
722 depIncludePkgDeps = False,
725 -- end of ghc -M values
726 filesToClean = panic "defaultDynFlags: No filesToClean",
727 dirsToClean = panic "defaultDynFlags: No dirsToClean",
728 haddockOptions = Nothing,
730 Opt_AutoLinkPackages,
731 Opt_ReadUserPackageConf,
741 Opt_PrintBindContents
743 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
744 -- The default -O0 options
748 extensionFlags = Left [],
750 log_action = \severity srcSpan style msg ->
752 SevOutput -> printOutput (msg style)
753 SevInfo -> printErrs (msg style)
754 SevFatal -> printErrs (msg style)
757 printErrs ((mkLocMessage srcSpan msg) style)
758 -- careful (#2302): printErrs prints in UTF-8, whereas
759 -- converting to string first and using hPutStr would
760 -- just emit the low 8 bits of each unicode char.
764 Note [Verbosity levels]
765 ~~~~~~~~~~~~~~~~~~~~~~~
766 0 | print errors & warnings only
767 1 | minimal verbosity: print "compiling M ... done." for each module.
768 2 | equivalent to -dshow-passes
769 3 | equivalent to existing "ghc -v"
770 4 | "ghc -v -ddump-most"
771 5 | "ghc -v -ddump-all"
777 flattenExtensionFlags :: DynFlags -> DynFlags
778 flattenExtensionFlags dflags
779 = case extensionFlags dflags of
782 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
785 panic "Flattening already-flattened extension flags"
787 ensureFlattenedExtensionFlags :: DynFlags -> DynFlags
788 ensureFlattenedExtensionFlags dflags
789 = case extensionFlags dflags of
792 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
797 -- OnOffs accumulate in reverse order, so we use foldr in order to
798 -- process them in the right order
799 flattenExtensionFlags' :: Maybe Language -> [OnOff ExtensionFlag]
801 flattenExtensionFlags' ml = foldr f defaultExtensionFlags
802 where f (On f) flags = f : delete f flags
803 f (Off f) flags = delete f flags
804 defaultExtensionFlags = languageExtensions ml
806 languageExtensions :: Maybe Language -> [ExtensionFlag]
807 languageExtensions Nothing
808 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
809 -- behaviour the default, to see if anyone notices
811 : languageExtensions (Just Haskell2010)
812 languageExtensions (Just Haskell98)
813 = [Opt_ImplicitPrelude,
814 Opt_MonomorphismRestriction,
816 Opt_DatatypeContexts]
817 languageExtensions (Just Haskell2010)
818 = [Opt_ImplicitPrelude,
819 Opt_MonomorphismRestriction,
820 Opt_DatatypeContexts,
822 Opt_ForeignFunctionInterface,
827 -- The DOpt class is a temporary workaround, to avoid having to do
828 -- a mass-renaming dopt->lopt at the moment
830 dopt :: a -> DynFlags -> Bool
831 dopt_set :: DynFlags -> a -> DynFlags
832 dopt_unset :: DynFlags -> a -> DynFlags
834 instance DOpt DynFlag where
837 dopt_unset = dopt_unset'
839 instance DOpt ExtensionFlag where
842 dopt_unset = lopt_unset
844 -- | Test whether a 'DynFlag' is set
845 dopt' :: DynFlag -> DynFlags -> Bool
846 dopt' f dflags = f `elem` (flags dflags)
849 dopt_set' :: DynFlags -> DynFlag -> DynFlags
850 dopt_set' dfs f = dfs{ flags = f : flags dfs }
852 -- | Unset a 'DynFlag'
853 dopt_unset' :: DynFlags -> DynFlag -> DynFlags
854 dopt_unset' dfs f = dfs{ flags = filter (/= f) (flags dfs) }
856 -- | Test whether a 'ExtensionFlag' is set
857 lopt :: ExtensionFlag -> DynFlags -> Bool
858 lopt f dflags = case extensionFlags dflags of
859 Left _ -> panic ("Testing for extension flag " ++ show f ++ " before flattening")
860 Right flags -> f `elem` flags
862 -- | Set a 'ExtensionFlag'
863 lopt_set :: DynFlags -> ExtensionFlag -> DynFlags
864 lopt_set dfs f = case extensionFlags dfs of
865 Left onoffs -> dfs { extensionFlags = Left (On f : onoffs) }
866 Right _ -> panic ("Setting extension flag " ++ show f ++ " after flattening")
868 -- | Set a 'ExtensionFlag'
869 lopt_set_flattened :: DynFlags -> ExtensionFlag -> DynFlags
870 lopt_set_flattened dfs f = case extensionFlags dfs of
872 panic ("Setting extension flag " ++ show f ++ " before flattening, but expected flattened")
874 dfs { extensionFlags = Right (f : delete f flags) }
876 -- | Unset a 'ExtensionFlag'
877 lopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
878 lopt_unset dfs f = case extensionFlags dfs of
879 Left onoffs -> dfs { extensionFlags = Left (Off f : onoffs) }
880 Right _ -> panic ("Unsetting extension flag " ++ show f ++ " after flattening")
882 -- | Unset a 'ExtensionFlag'
883 lopt_unset_flattened :: DynFlags -> ExtensionFlag -> DynFlags
884 lopt_unset_flattened dfs f = case extensionFlags dfs of
886 panic ("Unsetting extension flag " ++ show f ++ " before flattening, but expected flattened")
888 dfs { extensionFlags = Right (delete f flags) }
890 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
891 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
892 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
893 -> [a] -- ^ Correctly ordered extracted options
894 getOpts dflags opts = reverse (opts dflags)
895 -- We add to the options from the front, so we need to reverse the list
897 -- | Gets the verbosity flag for the current verbosity level. This is fed to
898 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
899 getVerbFlag :: DynFlags -> String
901 | verbosity dflags >= 3 = "-v"
904 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
905 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
906 setPgmP, addOptl, addOptP,
907 addCmdlineFramework, addHaddockOpts
908 :: String -> DynFlags -> DynFlags
909 setOutputFile, setOutputHi, setDumpPrefixForce
910 :: Maybe String -> DynFlags -> DynFlags
912 setObjectDir f d = d{ objectDir = Just f}
913 setHiDir f d = d{ hiDir = Just f}
914 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
915 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
916 -- \#included from the .hc file when compiling with -fvia-C.
917 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
918 setDylibInstallName f d = d{ dylibInstallName = Just f}
920 setObjectSuf f d = d{ objectSuf = f}
921 setHiSuf f d = d{ hiSuf = f}
922 setHcSuf f d = d{ hcSuf = f}
924 setOutputFile f d = d{ outputFile = f}
925 setOutputHi f d = d{ outputHi = f}
927 parseDynLibLoaderMode f d =
929 ("deploy", "") -> d{ dynLibLoader = Deployable }
930 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
931 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
932 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
933 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
934 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
936 setDumpPrefixForce f d = d { dumpPrefixForce = f}
938 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
939 -- Config.hs should really use Option.
940 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
941 addOptl f d = d{ opt_l = f : opt_l d}
942 addOptP f d = d{ opt_P = f : opt_P d}
945 setDepMakefile :: FilePath -> DynFlags -> DynFlags
946 setDepMakefile f d = d { depMakefile = deOptDep f }
948 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
949 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
951 addDepExcludeMod :: String -> DynFlags -> DynFlags
953 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
955 addDepSuffix :: FilePath -> DynFlags -> DynFlags
956 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
959 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
960 -- we need to strip the "-optdep" off of the arg
961 deOptDep :: String -> String
962 deOptDep x = case stripPrefix "-optdep" x of
966 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
968 addHaddockOpts f d = d{ haddockOptions = Just f}
970 -- -----------------------------------------------------------------------------
971 -- Command-line options
973 -- | When invoking external tools as part of the compilation pipeline, we
974 -- pass these a sequence of options on the command-line. Rather than
975 -- just using a list of Strings, we use a type that allows us to distinguish
976 -- between filepaths and 'other stuff'. The reason for this is that
977 -- this type gives us a handle on transforming filenames, and filenames only,
978 -- to whatever format they're expected to be on a particular platform.
980 = FileOption -- an entry that _contains_ filename(s) / filepaths.
981 String -- a non-filepath prefix that shouldn't be
982 -- transformed (e.g., "/out=")
983 String -- the filepath/filename portion
986 showOpt :: Option -> String
987 showOpt (FileOption pre f) = pre ++ f
988 showOpt (Option s) = s
990 -----------------------------------------------------------------------------
991 -- Setting the optimisation level
993 updOptLevel :: Int -> DynFlags -> DynFlags
994 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
996 = dfs2{ optLevel = final_n }
998 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
999 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1000 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1002 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1003 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1005 optLevelFlags :: [([Int], DynFlag)]
1007 = [ ([0], Opt_IgnoreInterfacePragmas)
1008 , ([0], Opt_OmitInterfacePragmas)
1010 , ([1,2], Opt_IgnoreAsserts)
1011 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1013 , ([1,2], Opt_DoEtaReduction)
1014 , ([1,2], Opt_CaseMerge)
1015 , ([1,2], Opt_Strictness)
1017 , ([1,2], Opt_FullLaziness)
1018 , ([1,2], Opt_Specialise)
1019 , ([1,2], Opt_FloatIn)
1021 , ([2], Opt_LiberateCase)
1022 , ([2], Opt_SpecConstr)
1024 -- , ([2], Opt_StaticArgumentTransformation)
1025 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1026 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1027 -- several improvements to the heuristics, and I'm concerned that without
1028 -- those changes SAT will interfere with some attempts to write "high
1029 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1030 -- this year. In particular, the version in HEAD lacks the tail call
1031 -- criterion, so many things that look like reasonable loops will be
1032 -- turned into functions with extra (unneccesary) thunk creation.
1034 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1035 -- This one is important for a tiresome reason:
1036 -- we want to make sure that the bindings for data
1037 -- constructors are eta-expanded. This is probably
1038 -- a good thing anyway, but it seems fragile.
1041 -- -----------------------------------------------------------------------------
1042 -- Standard sets of warning options
1044 standardWarnings :: [DynFlag]
1046 = [ Opt_WarnWarningsDeprecations,
1047 Opt_WarnDeprecatedFlags,
1048 Opt_WarnUnrecognisedPragmas,
1049 Opt_WarnOverlappingPatterns,
1050 Opt_WarnMissingFields,
1051 Opt_WarnMissingMethods,
1052 Opt_WarnDuplicateExports,
1053 Opt_WarnLazyUnliftedBindings,
1054 Opt_WarnDodgyForeignImports,
1055 Opt_WarnWrongDoBind,
1056 Opt_WarnAlternativeLayoutRuleTransitional
1059 minusWOpts :: [DynFlag]
1061 = standardWarnings ++
1062 [ Opt_WarnUnusedBinds,
1063 Opt_WarnUnusedMatches,
1064 Opt_WarnUnusedImports,
1065 Opt_WarnIncompletePatterns,
1066 Opt_WarnDodgyExports,
1067 Opt_WarnDodgyImports
1070 minusWallOpts :: [DynFlag]
1073 [ Opt_WarnTypeDefaults,
1074 Opt_WarnNameShadowing,
1075 Opt_WarnMissingSigs,
1078 Opt_WarnUnusedDoBind
1081 -- minuswRemovesOpts should be every warning option
1082 minuswRemovesOpts :: [DynFlag]
1085 [Opt_WarnImplicitPrelude,
1086 Opt_WarnIncompletePatternsRecUpd,
1087 Opt_WarnSimplePatterns,
1088 Opt_WarnMonomorphism,
1089 Opt_WarnUnrecognisedPragmas,
1093 -- -----------------------------------------------------------------------------
1094 -- StgToDo: abstraction of stg-to-stg passes to run.
1097 = StgDoMassageForProfiling -- should be (next to) last
1098 -- There's also setStgVarInfo, but its absolute "lastness"
1099 -- is so critical that it is hardwired in (no flag).
1102 getStgToDo :: DynFlags -> [StgToDo]
1106 stg_stats = dopt Opt_StgStats dflags
1108 todo1 = if stg_stats then [D_stg_stats] else []
1110 todo2 | WayProf `elem` wayNames dflags
1111 = StgDoMassageForProfiling : todo1
1115 {- **********************************************************************
1119 %********************************************************************* -}
1121 -- -----------------------------------------------------------------------------
1122 -- Parsing the dynamic flags.
1124 -- | Parse dynamic flags from a list of command line arguments. Returns the
1125 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1126 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1127 -- flags or missing arguments).
1128 parseDynamicFlags :: Monad m =>
1129 DynFlags -> [Located String]
1130 -> m (DynFlags, [Located String], [Located String])
1131 -- ^ Updated 'DynFlags', left-over arguments, and
1132 -- list of warnings.
1133 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1135 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1136 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1137 parseDynamicNoPackageFlags :: Monad m =>
1138 DynFlags -> [Located String]
1139 -> m (DynFlags, [Located String], [Located String])
1140 -- ^ Updated 'DynFlags', left-over arguments, and
1141 -- list of warnings.
1142 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1144 parseDynamicFlags_ :: Monad m =>
1145 DynFlags -> [Located String] -> Bool
1146 -> m (DynFlags, [Located String], [Located String])
1147 parseDynamicFlags_ dflags0 args pkg_flags = do
1148 -- XXX Legacy support code
1149 -- We used to accept things like
1150 -- optdep-f -optdepdepend
1151 -- optdep-f -optdep depend
1152 -- optdep -f -optdepdepend
1153 -- optdep -f -optdep depend
1154 -- but the spaces trip up proper argument handling. So get rid of them.
1155 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1156 f (x : xs) = x : f xs
1160 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1161 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1162 | otherwise = dynamic_flags
1164 let ((leftover, errs, warns), dflags1)
1165 = runCmdLine (processArgs flag_spec args') dflags0
1166 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1168 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1169 -- isn't up to the job. We know that if hscTarget == HscC, then the
1170 -- user has explicitly used -fvia-C, because -fasm is the default,
1171 -- unless there is no NCG on this platform. The latter case is
1172 -- checked when the -fPIC flag is parsed.
1174 let (pic_warns, dflags2)
1175 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1176 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1177 dflags1{ hscTarget = HscAsm })
1178 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1179 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1180 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1181 ++ "dynamic on this platform;\n ignoring -fllvm"],
1182 dflags1{ hscTarget = HscAsm })
1184 | otherwise = ([], dflags1)
1186 return (dflags2, leftover, pic_warns ++ warns)
1189 {- **********************************************************************
1191 DynFlags specifications
1193 %********************************************************************* -}
1195 allFlags :: [String]
1196 allFlags = map ('-':) $
1197 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1198 map ("fno-"++) flags ++
1199 map ("f"++) flags ++
1200 map ("f"++) flags' ++
1201 map ("X"++) supportedExtensions
1202 where ok (PrefixPred _ _) = False
1204 flags = [ name | (name, _, _) <- fFlags ]
1205 flags' = [ name | (name, _, _) <- fLangFlags ]
1207 --------------- The main flags themselves ------------------
1208 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1210 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1211 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1212 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1214 (HasArg (\s -> do { addCmdlineHCInclude s
1215 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1216 , Flag "v" (OptIntSuffix setVerbosity)
1218 ------- Specific phases --------------------------------------------
1219 -- need to appear before -pgmL to be parsed as LLVM flags.
1220 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1221 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1222 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1223 , Flag "pgmP" (hasArg setPgmP)
1224 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1225 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1226 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1227 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1228 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1229 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1230 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1231 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1233 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1234 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1235 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1236 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1237 , Flag "optP" (hasArg addOptP)
1238 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1239 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1240 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1241 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1242 , Flag "optl" (hasArg addOptl)
1243 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1246 (NoArg (if can_split
1247 then setDynFlag Opt_SplitObjs
1248 else addWarn "ignoring -fsplit-objs"))
1250 -------- ghc -M -----------------------------------------------------
1251 , Flag "dep-suffix" (hasArg addDepSuffix)
1252 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1253 , Flag "dep-makefile" (hasArg setDepMakefile)
1254 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1255 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1256 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1257 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1258 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1259 , Flag "exclude-module" (hasArg addDepExcludeMod)
1260 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1261 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1263 -------- Linking ----------------------------------------------------
1264 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1265 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1266 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1267 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1269 ------- Libraries ---------------------------------------------------
1270 , Flag "L" (Prefix addLibraryPath)
1271 , Flag "l" (AnySuffix (upd . addOptl))
1273 ------- Frameworks --------------------------------------------------
1274 -- -framework-path should really be -F ...
1275 , Flag "framework-path" (HasArg addFrameworkPath)
1276 , Flag "framework" (hasArg addCmdlineFramework)
1278 ------- Output Redirection ------------------------------------------
1279 , Flag "odir" (hasArg setObjectDir)
1280 , Flag "o" (SepArg (upd . setOutputFile . Just))
1281 , Flag "ohi" (hasArg (setOutputHi . Just ))
1282 , Flag "osuf" (hasArg setObjectSuf)
1283 , Flag "hcsuf" (hasArg setHcSuf)
1284 , Flag "hisuf" (hasArg setHiSuf)
1285 , Flag "hidir" (hasArg setHiDir)
1286 , Flag "tmpdir" (hasArg setTmpDir)
1287 , Flag "stubdir" (hasArg setStubDir)
1288 , Flag "outputdir" (hasArg setOutputDir)
1289 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1291 ------- Keeping temporary files -------------------------------------
1292 -- These can be singular (think ghc -c) or plural (think ghc --make)
1293 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1294 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1295 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1296 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1297 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1298 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1299 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1300 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1301 -- This only makes sense as plural
1302 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1304 ------- Miscellaneous ----------------------------------------------
1305 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1306 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1307 , Flag "with-rtsopts" (HasArg setRtsOpts)
1308 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1309 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1310 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1311 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1312 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1313 , Flag "main-is" (SepArg setMainIs)
1314 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1315 , Flag "haddock-opts" (hasArg addHaddockOpts)
1316 , Flag "hpcdir" (SepArg setOptHpcDir)
1318 ------- recompilation checker --------------------------------------
1319 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1320 ; deprecate "Use -fno-force-recomp instead" }))
1321 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1322 ; deprecate "Use -fforce-recomp instead" }))
1324 ------ HsCpp opts ---------------------------------------------------
1325 , Flag "D" (AnySuffix (upd . addOptP))
1326 , Flag "U" (AnySuffix (upd . addOptP))
1328 ------- Include/Import Paths ----------------------------------------
1329 , Flag "I" (Prefix addIncludePath)
1330 , Flag "i" (OptPrefix addImportPath)
1332 ------ Debugging ----------------------------------------------------
1333 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1335 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1336 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1337 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1338 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1339 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1340 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1341 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1342 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1343 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1344 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1345 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1346 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1347 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1348 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1349 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1350 ; setDumpFlag' Opt_D_dump_llvm}))
1351 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1352 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1353 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1354 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1355 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1356 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1357 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1358 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1359 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1360 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1361 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1362 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1363 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1364 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1365 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1366 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1367 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1368 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1369 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1370 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1371 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1372 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1373 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1374 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1375 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1376 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1377 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1378 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1379 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1380 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1381 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1382 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1383 ; setVerboseCore2Core }))
1384 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1385 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1386 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1387 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1388 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1389 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1390 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1391 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1392 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1393 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1394 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1395 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1396 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1397 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1398 , Flag "dshow-passes" (NoArg (do forceRecompile
1399 setVerbosity (Just 2)))
1400 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1402 ------ Machine dependant (-m<blah>) stuff ---------------------------
1404 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1405 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1406 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1407 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1409 ------ Warning opts -------------------------------------------------
1410 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1411 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1412 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1413 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1414 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1415 ; deprecate "Use -w instead" }))
1416 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1418 ------ Optimisation flags ------------------------------------------
1419 , Flag "O" (noArg (setOptLevel 1))
1420 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1421 , Flag "Odph" (noArg setDPHOpt)
1422 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1423 -- If the number is missing, use 1
1425 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1426 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1427 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1428 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1429 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1430 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1431 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1432 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1433 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1434 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1435 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1437 ------ Profiling ----------------------------------------------------
1439 -- XXX Should the -f* flags be deprecated?
1440 -- They don't seem to be documented
1441 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1442 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1443 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1444 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1445 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1446 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1447 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1448 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1449 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1451 ------ DPH flags ----------------------------------------------------
1453 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1454 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1455 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1457 ------ Compiler flags -----------------------------------------------
1459 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1460 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1461 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1462 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1463 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1464 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1466 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1467 setTarget HscNothing))
1468 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1469 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1470 , Flag "fglasgow-exts" (NoArg enableGlasgowExts)
1471 , Flag "fno-glasgow-exts" (NoArg disableGlasgowExts)
1473 ++ map (mkFlag True "f" setDynFlag ) fFlags
1474 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1475 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1476 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1477 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1478 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1479 ++ map (mkFlag True "X" setLanguage) languageFlags
1481 package_flags :: [Flag (CmdLineP DynFlags)]
1483 ------- Packages ----------------------------------------------------
1484 Flag "package-conf" (HasArg extraPkgConf_)
1485 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1486 , Flag "package-name" (hasArg setPackageName)
1487 , Flag "package-id" (HasArg exposePackageId)
1488 , Flag "package" (HasArg exposePackage)
1489 , Flag "hide-package" (HasArg hidePackage)
1490 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1491 , Flag "ignore-package" (HasArg ignorePackage)
1492 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1493 ; deprecate "Use -package instead" }))
1497 = ( String -- Flag in string form
1498 , flag -- Flag in internal form
1499 , Bool -> DynP ()) -- Extra action to run when the flag is found
1500 -- Typically, emit a warning or error
1501 -- True <=> we are turning the flag on
1502 -- False <=> we are turning the flag on
1505 mkFlag :: Bool -- ^ True <=> it should be turned on
1506 -> String -- ^ The flag prefix
1507 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1508 -> FlagSpec flag -- ^ Specification of this particular flag
1509 -> Flag (CmdLineP DynFlags)
1510 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1511 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1513 deprecatedForExtension :: String -> Bool -> DynP ()
1514 deprecatedForExtension lang turn_on
1515 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1517 flag | turn_on = lang
1518 | otherwise = "No"++lang
1520 useInstead :: String -> Bool -> DynP ()
1521 useInstead flag turn_on
1522 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1524 no = if turn_on then "" else "no-"
1526 nop :: Bool -> DynP ()
1529 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1530 fFlags :: [FlagSpec DynFlag]
1532 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1533 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1534 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1535 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1536 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1537 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1538 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1539 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1540 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1541 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1542 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1543 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1544 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1545 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1546 ( "warn-simple-patterns", Opt_WarnSimplePatterns, nop ),
1547 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1548 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1549 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1550 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1551 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1552 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1553 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1554 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1555 ( "warn-orphans", Opt_WarnOrphans, nop ),
1556 ( "warn-tabs", Opt_WarnTabs, nop ),
1557 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1558 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1559 \_ -> deprecate "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1560 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1561 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1562 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1563 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1564 ( "strictness", Opt_Strictness, nop ),
1565 ( "specialise", Opt_Specialise, nop ),
1566 ( "float-in", Opt_FloatIn, nop ),
1567 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1568 ( "full-laziness", Opt_FullLaziness, nop ),
1569 ( "liberate-case", Opt_LiberateCase, nop ),
1570 ( "spec-constr", Opt_SpecConstr, nop ),
1571 ( "cse", Opt_CSE, nop ),
1572 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1573 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1574 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1575 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1576 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1577 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1578 ( "case-merge", Opt_CaseMerge, nop ),
1579 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1580 ( "method-sharing", Opt_MethodSharing, nop ),
1581 ( "dicts-cheap", Opt_DictsCheap, nop ),
1582 ( "excess-precision", Opt_ExcessPrecision, nop ),
1583 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1584 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1585 ( "print-bind-result", Opt_PrintBindResult, nop ),
1586 ( "force-recomp", Opt_ForceRecomp, nop ),
1587 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1588 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1589 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1590 ( "break-on-exception", Opt_BreakOnException, nop ),
1591 ( "break-on-error", Opt_BreakOnError, nop ),
1592 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1593 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1594 ( "run-cps", Opt_RunCPS, nop ),
1595 ( "run-cpsz", Opt_RunCPSZ, nop ),
1596 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1597 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1598 ( "vectorise", Opt_Vectorise, nop ),
1599 ( "regs-graph", Opt_RegsGraph, nop ),
1600 ( "regs-iterative", Opt_RegsIterative, nop ),
1601 ( "gen-manifest", Opt_GenManifest, nop ),
1602 ( "embed-manifest", Opt_EmbedManifest, nop ),
1603 ( "ext-core", Opt_EmitExternalCore, nop ),
1604 ( "shared-implib", Opt_SharedImplib, nop ),
1605 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1606 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1609 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1610 fLangFlags :: [FlagSpec ExtensionFlag]
1612 ( "th", Opt_TemplateHaskell,
1613 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1614 ( "fi", Opt_ForeignFunctionInterface,
1615 deprecatedForExtension "ForeignFunctionInterface" ),
1616 ( "ffi", Opt_ForeignFunctionInterface,
1617 deprecatedForExtension "ForeignFunctionInterface" ),
1618 ( "arrows", Opt_Arrows,
1619 deprecatedForExtension "Arrows" ),
1620 ( "generics", Opt_Generics,
1621 deprecatedForExtension "Generics" ),
1622 ( "implicit-prelude", Opt_ImplicitPrelude,
1623 deprecatedForExtension "ImplicitPrelude" ),
1624 ( "bang-patterns", Opt_BangPatterns,
1625 deprecatedForExtension "BangPatterns" ),
1626 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1627 deprecatedForExtension "MonomorphismRestriction" ),
1628 ( "mono-pat-binds", Opt_MonoPatBinds,
1629 deprecatedForExtension "MonoPatBinds" ),
1630 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1631 deprecatedForExtension "ExtendedDefaultRules" ),
1632 ( "implicit-params", Opt_ImplicitParams,
1633 deprecatedForExtension "ImplicitParams" ),
1634 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1635 deprecatedForExtension "ScopedTypeVariables" ),
1637 deprecatedForExtension "PArr" ),
1638 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1639 deprecatedForExtension "OverlappingInstances" ),
1640 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1641 deprecatedForExtension "UndecidableInstances" ),
1642 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1643 deprecatedForExtension "IncoherentInstances" )
1646 supportedLanguages :: [String]
1647 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1649 supportedExtensions :: [String]
1650 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1652 supportedLanguagesAndExtensions :: [String]
1653 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1655 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1656 languageFlags :: [FlagSpec Language]
1658 ( "Haskell98", Haskell98, nop ),
1659 ( "Haskell2010", Haskell2010, nop )
1662 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1663 xFlags :: [FlagSpec ExtensionFlag]
1665 ( "CPP", Opt_Cpp, nop ),
1666 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1667 ( "TupleSections", Opt_TupleSections, nop ),
1668 ( "PatternGuards", Opt_PatternGuards, nop ),
1669 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1670 ( "MagicHash", Opt_MagicHash, nop ),
1671 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1672 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1673 ( "KindSignatures", Opt_KindSignatures, nop ),
1674 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1675 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1676 ( "TransformListComp", Opt_TransformListComp, nop ),
1677 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1678 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1679 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1680 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1681 ( "Rank2Types", Opt_Rank2Types, nop ),
1682 ( "RankNTypes", Opt_RankNTypes, nop ),
1683 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1684 \_ -> deprecate "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1685 ( "TypeOperators", Opt_TypeOperators, nop ),
1686 ( "RecursiveDo", Opt_RecursiveDo,
1687 deprecatedForExtension "DoRec"),
1688 ( "DoRec", Opt_DoRec, nop ),
1689 ( "Arrows", Opt_Arrows, nop ),
1690 ( "PArr", Opt_PArr, nop ),
1691 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1692 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1693 ( "Generics", Opt_Generics, nop ),
1694 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1695 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1696 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1697 ( "RecordPuns", Opt_RecordPuns,
1698 deprecatedForExtension "NamedFieldPuns" ),
1699 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1700 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1701 ( "GADTs", Opt_GADTs, nop ),
1702 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1703 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1704 ( "BangPatterns", Opt_BangPatterns, nop ),
1705 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1706 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1707 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1708 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1709 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1710 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1711 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1712 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1713 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1714 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, nop ),
1715 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1716 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1717 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1719 ( "PatternSignatures", Opt_ScopedTypeVariables,
1720 deprecatedForExtension "ScopedTypeVariables" ),
1722 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1723 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1724 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1725 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1726 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1727 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1728 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1729 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1730 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1731 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1732 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1733 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1734 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1735 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1736 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1737 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1738 ( "PackageImports", Opt_PackageImports, nop ),
1739 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1740 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1743 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1745 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1746 , (Opt_Rank2Types, Opt_ExplicitForAll)
1747 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1748 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1749 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1750 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1752 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1753 -- be completely rigid for GADTs
1755 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1756 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1757 -- all over the place
1759 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1760 -- Note [Scoped tyvars] in TcBinds
1761 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1763 -- Record wild-cards implies field disambiguation
1764 -- Otherwise if you write (C {..}) you may well get
1765 -- stuff like " 'a' not in scope ", which is a bit silly
1766 -- if the compiler has just filled in field 'a' of constructor 'C'
1767 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1770 enableGlasgowExts :: DynP ()
1771 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1772 mapM_ setExtensionFlag glasgowExtsFlags
1774 disableGlasgowExts :: DynP ()
1775 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1776 mapM_ unSetExtensionFlag glasgowExtsFlags
1778 glasgowExtsFlags :: [ExtensionFlag]
1779 glasgowExtsFlags = [
1780 Opt_ForeignFunctionInterface
1781 , Opt_UnliftedFFITypes
1783 , Opt_ImplicitParams
1784 , Opt_ScopedTypeVariables
1786 , Opt_TypeSynonymInstances
1787 , Opt_StandaloneDeriving
1788 , Opt_DeriveDataTypeable
1790 , Opt_DeriveFoldable
1791 , Opt_DeriveTraversable
1792 , Opt_FlexibleContexts
1793 , Opt_FlexibleInstances
1794 , Opt_ConstrainedClassMethods
1795 , Opt_MultiParamTypeClasses
1796 , Opt_FunctionalDependencies
1798 , Opt_PolymorphicComponents
1799 , Opt_ExistentialQuantification
1801 , Opt_PostfixOperators
1803 , Opt_LiberalTypeSynonyms
1807 , Opt_ParallelListComp
1808 , Opt_EmptyDataDecls
1809 , Opt_KindSignatures
1810 , Opt_GeneralizedNewtypeDeriving
1811 , Opt_TypeFamilies ]
1813 -- Consult the RTS to find whether GHC itself has been built profiled
1814 -- If so, you can't use Template Haskell
1815 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1817 rtsIsProfiled :: Bool
1818 rtsIsProfiled = False -- unsafePerformIO rtsIsProfiledIO /= 0
1820 checkTemplateHaskellOk :: Bool -> DynP ()
1821 checkTemplateHaskellOk turn_on
1822 | turn_on && rtsIsProfiled
1823 = addErr "You can't use Template Haskell with a profiled compiler"
1827 {- **********************************************************************
1829 DynFlags constructors
1831 %********************************************************************* -}
1833 type DynP = EwM (CmdLineP DynFlags)
1835 upd :: (DynFlags -> DynFlags) -> DynP ()
1836 upd f = liftEwM (do { dfs <- getCmdLineState
1837 ; putCmdLineState $! (f dfs) })
1839 --------------- Constructor functions for OptKind -----------------
1840 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1841 noArg fn = NoArg (upd fn)
1843 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1844 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1846 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1847 hasArg fn = HasArg (upd . fn)
1849 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1850 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1851 ; deprecate deprec })
1853 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1854 intSuffix fn = IntSuffix (\n -> upd (fn n))
1856 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1857 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1859 --------------------------
1860 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1861 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1862 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1864 --------------------------
1865 setLanguage :: Language -> DynP ()
1866 setLanguage l = upd (\dfs -> dfs { language = Just l })
1868 --------------------------
1869 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1870 setExtensionFlag f = do { upd (\dfs -> lopt_set dfs f)
1871 ; mapM_ setExtensionFlag deps }
1873 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1874 -- When you set f, set the ones it implies
1875 -- NB: use setExtensionFlag recursively, in case the implied flags
1876 -- implies further flags
1877 -- When you un-set f, however, we don't un-set the things it implies
1878 -- (except for -fno-glasgow-exts, which is treated specially)
1880 unSetExtensionFlag f = upd (\dfs -> lopt_unset dfs f)
1882 --------------------------
1883 setDumpFlag' :: DynFlag -> DynP ()
1884 setDumpFlag' dump_flag
1885 = do { setDynFlag dump_flag
1886 ; when want_recomp forceRecompile }
1888 -- Certain dumpy-things are really interested in what's going
1889 -- on during recompilation checking, so in those cases we
1890 -- don't want to turn it off.
1891 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1892 Opt_D_dump_hi_diffs]
1894 forceRecompile :: DynP ()
1895 -- Whenver we -ddump, force recompilation (by switching off the
1896 -- recompilation checker), else you don't see the dump! However,
1897 -- don't switch it off in --make mode, else *everything* gets
1898 -- recompiled which probably isn't what you want
1899 forceRecompile = do { dfs <- liftEwM getCmdLineState
1900 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1902 force_recomp dfs = isOneShot (ghcMode dfs)
1904 setVerboseCore2Core :: DynP ()
1905 setVerboseCore2Core = do forceRecompile
1906 setDynFlag Opt_D_verbose_core2core
1907 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1910 setDumpSimplPhases :: String -> DynP ()
1911 setDumpSimplPhases s = do forceRecompile
1912 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1914 spec = case s of { ('=' : s') -> s'; _ -> s }
1916 setVerbosity :: Maybe Int -> DynP ()
1917 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1919 addCmdlineHCInclude :: String -> DynP ()
1920 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1922 extraPkgConf_ :: FilePath -> DynP ()
1923 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1925 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1927 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1929 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1931 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1933 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1935 setPackageName :: String -> DynFlags -> DynFlags
1936 setPackageName p s = s{ thisPackage = stringToPackageId p }
1938 -- If we're linking a binary, then only targets that produce object
1939 -- code are allowed (requests for other target types are ignored).
1940 setTarget :: HscTarget -> DynP ()
1941 setTarget l = upd set
1944 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1947 -- Changes the target only if we're compiling object code. This is
1948 -- used by -fasm and -fvia-C, which switch from one to the other, but
1949 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1950 -- can be safely used in an OPTIONS_GHC pragma.
1951 setObjTarget :: HscTarget -> DynP ()
1952 setObjTarget l = upd set
1955 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1958 setOptLevel :: Int -> DynFlags -> DynFlags
1959 setOptLevel n dflags
1960 | hscTarget dflags == HscInterpreted && n > 0
1962 -- not in IO any more, oh well:
1963 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1965 = updOptLevel n dflags
1968 -- -Odph is equivalent to
1970 -- -O2 optimise as much as possible
1971 -- -fno-method-sharing sharing specialisation defeats fusion
1973 -- -fdicts-cheap always inline dictionaries
1974 -- -fmax-simplifier-iterations20 this is necessary sometimes
1975 -- -fsimplifier-phases=3 we use an additional simplifier phase
1977 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1978 -- -fno-spec-constr-count SpecConstr as much as possible
1979 -- -finline-enough-args hack to prevent excessive inlining
1981 setDPHOpt :: DynFlags -> DynFlags
1982 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1984 , specConstrThreshold = Nothing
1985 , specConstrCount = Nothing
1987 `dopt_set` Opt_DictsCheap
1988 `dopt_unset` Opt_MethodSharing
1990 data DPHBackend = DPHPar
1993 deriving(Eq, Ord, Enum, Show)
1995 setDPHBackend :: DPHBackend -> DynP ()
1996 setDPHBackend backend
1998 upd $ \dflags -> dflags { dphBackend = backend }
1999 mapM_ exposePackage (dph_packages backend)
2001 dph_packages DPHThis = []
2002 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2003 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2005 dphPackage :: DynFlags -> PackageId
2006 dphPackage dflags = case dphBackend dflags of
2007 DPHPar -> dphParPackageId
2008 DPHSeq -> dphSeqPackageId
2009 DPHThis -> thisPackage dflags
2011 setMainIs :: String -> DynP ()
2013 | not (null main_fn) && isLower (head main_fn)
2014 -- The arg looked like "Foo.Bar.baz"
2015 = upd $ \d -> d{ mainFunIs = Just main_fn,
2016 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2018 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2019 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2021 | otherwise -- The arg looked like "baz"
2022 = upd $ \d -> d{ mainFunIs = Just arg }
2024 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2026 -----------------------------------------------------------------------------
2027 -- Paths & Libraries
2029 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2031 -- -i on its own deletes the import paths
2032 addImportPath "" = upd (\s -> s{importPaths = []})
2033 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2037 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2040 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2042 addFrameworkPath p =
2043 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2045 #ifndef mingw32_TARGET_OS
2046 split_marker :: Char
2047 split_marker = ':' -- not configurable (ToDo)
2050 splitPathList :: String -> [String]
2051 splitPathList s = filter notNull (splitUp s)
2052 -- empty paths are ignored: there might be a trailing
2053 -- ':' in the initial list, for example. Empty paths can
2054 -- cause confusion when they are translated into -I options
2055 -- for passing to gcc.
2057 #ifndef mingw32_TARGET_OS
2058 splitUp xs = split split_marker xs
2060 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2062 -- That is, if "foo:bar:baz" is used, this interpreted as
2063 -- consisting of three entries, 'foo', 'bar', 'baz'.
2064 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2065 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2067 -- Notice that no attempt is made to fully replace the 'standard'
2068 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2069 -- that this will cause too much breakage for users & ':' will
2070 -- work fine even with DOS paths, if you're not insisting on being silly.
2073 splitUp (x:':':div:xs) | div `elem` dir_markers
2074 = ((x:':':div:p): splitUp rs)
2076 (p,rs) = findNextPath xs
2077 -- we used to check for existence of the path here, but that
2078 -- required the IO monad to be threaded through the command-line
2079 -- parser which is quite inconvenient. The
2080 splitUp xs = cons p (splitUp rs)
2082 (p,rs) = findNextPath xs
2087 -- will be called either when we've consumed nought or the
2088 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2089 -- finding the next split marker.
2091 case break (`elem` split_markers) xs of
2092 (p, _:ds) -> (p, ds)
2095 split_markers :: [Char]
2096 split_markers = [':', ';']
2098 dir_markers :: [Char]
2099 dir_markers = ['/', '\\']
2102 -- -----------------------------------------------------------------------------
2103 -- tmpDir, where we store temporary files.
2105 setTmpDir :: FilePath -> DynFlags -> DynFlags
2106 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2107 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2108 -- seem necessary now --SDM 7/2/2008
2110 -----------------------------------------------------------------------------
2113 setRtsOpts :: String -> DynP ()
2114 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2116 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2117 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2119 -----------------------------------------------------------------------------
2122 setOptHpcDir :: String -> DynP ()
2123 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2125 -----------------------------------------------------------------------------
2126 -- Via-C compilation stuff
2128 -- There are some options that we need to pass to gcc when compiling
2129 -- Haskell code via C, but are only supported by recent versions of
2130 -- gcc. The configure script decides which of these options we need,
2131 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2132 -- read before each via-C compilation. The advantage of having these
2133 -- in a separate file is that the file can be created at install-time
2134 -- depending on the available gcc version, and even re-generated later
2135 -- if gcc is upgraded.
2137 -- The options below are not dependent on the version of gcc, only the
2140 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2141 [String]) -- for registerised HC compilations
2142 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2143 in (cCcOpts ++ flagsAll, flagsRegHc)
2145 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2146 [String]) -- for registerised HC compilations
2147 machdepCCOpts' _dflags
2148 #if alpha_TARGET_ARCH
2150 #ifdef HAVE_THREADED_RTS_SUPPORT
2154 -- For now, to suppress the gcc warning "call-clobbered
2155 -- register used for global register variable", we simply
2156 -- disable all warnings altogether using the -w flag. Oh well.
2158 #elif hppa_TARGET_ARCH
2159 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2160 -- (very nice, but too bad the HP /usr/include files don't agree.)
2161 = ( ["-D_HPUX_SOURCE"], [] )
2163 #elif m68k_TARGET_ARCH
2164 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2165 -- popping of args to routines to be explicit; if we let things
2166 -- be deferred 'til after an STGJUMP, imminent death is certain!
2168 -- -fomit-frame-pointer : *don't*
2169 -- It's better to have a6 completely tied up being a frame pointer
2170 -- rather than let GCC pick random things to do with it.
2171 -- (If we want to steal a6, then we would try to do things
2172 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2173 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2175 #elif i386_TARGET_ARCH
2176 -- -fno-defer-pop : basically the same game as for m68k
2178 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2179 -- the fp (%ebp) for our register maps.
2180 = let n_regs = stolen_x86_regs _dflags
2183 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2186 "-fomit-frame-pointer",
2187 -- we want -fno-builtin, because when gcc inlines
2188 -- built-in functions like memcpy() it tends to
2189 -- run out of registers, requiring -monly-n-regs
2191 "-DSTOLEN_X86_REGS="++show n_regs ]
2194 #elif ia64_TARGET_ARCH
2195 = ( [], ["-fomit-frame-pointer", "-G0"] )
2197 #elif x86_64_TARGET_ARCH
2200 ["-fomit-frame-pointer",
2201 "-fno-asynchronous-unwind-tables",
2202 -- the unwind tables are unnecessary for HC code,
2203 -- and get in the way of -split-objs. Another option
2204 -- would be to throw them away in the mangler, but this
2207 -- calling builtins like strlen() using the FFI can
2208 -- cause gcc to run out of regs, so use the external
2212 #elif sparc_TARGET_ARCH
2214 -- For now, to suppress the gcc warning "call-clobbered
2215 -- register used for global register variable", we simply
2216 -- disable all warnings altogether using the -w flag. Oh well.
2218 #elif powerpc_apple_darwin_TARGET
2220 -- Disable Apple's precompiling preprocessor. It's a great thing
2221 -- for "normal" programs, but it doesn't support register variable
2223 = ( [], ["-no-cpp-precomp"] )
2228 picCCOpts :: DynFlags -> [String]
2230 #if darwin_TARGET_OS
2231 -- Apple prefers to do things the other way round.
2232 -- PIC is on by default.
2233 -- -mdynamic-no-pic:
2234 -- Turn off PIC code generation.
2236 -- Don't generate "common" symbols - these are unwanted
2237 -- in dynamic libraries.
2240 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2242 = ["-mdynamic-no-pic"]
2243 #elif mingw32_TARGET_OS
2244 -- no -fPIC for Windows
2246 = ["-U __PIC__","-D__PIC__"]
2250 -- we need -fPIC for C files when we are compiling with -dynamic,
2251 -- otherwise things like stub.c files don't get compiled
2252 -- correctly. They need to reference data in the Haskell
2253 -- objects, but can't without -fPIC. See
2254 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2255 | opt_PIC || not opt_Static
2256 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2261 -- -----------------------------------------------------------------------------
2265 can_split = cSplitObjs == "YES"
2267 -- -----------------------------------------------------------------------------
2270 data Printable = String String
2271 | FromDynFlags (DynFlags -> String)
2273 compilerInfo :: [(String, Printable)]
2274 compilerInfo = [("Project name", String cProjectName),
2275 ("Project version", String cProjectVersion),
2276 ("Booter version", String cBooterVersion),
2277 ("Stage", String cStage),
2278 ("Build platform", String cBuildPlatform),
2279 ("Host platform", String cHostPlatform),
2280 ("Target platform", String cTargetPlatform),
2281 ("Have interpreter", String cGhcWithInterpreter),
2282 ("Object splitting", String cSplitObjs),
2283 ("Have native code generator", String cGhcWithNativeCodeGen),
2284 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2285 ("Support SMP", String cGhcWithSMP),
2286 ("Unregisterised", String cGhcUnregisterised),
2287 ("Tables next to code", String cGhcEnableTablesNextToCode),
2288 ("RTS ways", String cGhcRTSWays),
2289 ("Leading underscore", String cLeadingUnderscore),
2290 ("Debug on", String (show debugIsOn)),
2291 ("LibDir", FromDynFlags topDir),
2292 ("Global Package DB", FromDynFlags systemPackageConfig)