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
20 flattenExtensionFlags,
21 ensureFlattenedExtensionFlags,
32 HscTarget(..), isObjectTarget, defaultObjectTarget,
33 GhcMode(..), isOneShot,
34 GhcLink(..), isNoLink,
38 fFlags, fLangFlags, xFlags,
42 -- ** Manipulating DynFlags
43 defaultDynFlags, -- DynFlags
44 initDynFlags, -- DynFlags -> IO DynFlags
46 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
53 -- ** Parsing DynFlags
55 parseDynamicNoPackageFlags,
58 supportedLanguagesAndExtensions,
60 -- ** DynFlag C compiler options
61 machdepCCOpts, picCCOpts,
63 -- * Configuration of the stg-to-stg passes
67 -- * Compiler configuration suitable for display to the user
71 -- Only in stage 2 can we be sure that the RTS
72 -- exposes the appropriate runtime boolean
77 #include "HsVersions.h"
79 #ifndef OMIT_NATIVE_CODEGEN
84 import PrelNames ( mAIN )
86 import {-# SOURCE #-} Packages (PackageState)
87 import DriverPhases ( Phase(..), phaseInputExt )
90 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
93 import Maybes ( orElse )
97 import Foreign.C ( CInt )
98 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
100 import System.IO.Unsafe ( unsafePerformIO )
102 import Control.Monad ( when )
106 import Data.Map (Map)
107 import qualified Data.Map as Map
108 import System.FilePath
109 import System.IO ( stderr, hPutChar )
111 -- -----------------------------------------------------------------------------
114 -- | Enumerates the simple on-or-off dynamic flags
120 | Opt_D_dump_cmmz_pretty
124 | Opt_D_dump_asm_native
125 | Opt_D_dump_asm_liveness
126 | Opt_D_dump_asm_coalesce
127 | Opt_D_dump_asm_regalloc
128 | Opt_D_dump_asm_regalloc_stages
129 | Opt_D_dump_asm_conflicts
130 | Opt_D_dump_asm_stats
131 | Opt_D_dump_asm_expanded
138 | Opt_D_dump_inlinings
139 | Opt_D_dump_rule_firings
140 | Opt_D_dump_occur_anal
144 | Opt_D_dump_simpl_iterations
145 | Opt_D_dump_simpl_phases
154 | Opt_D_dump_worker_wrapper
155 | Opt_D_dump_rn_trace
156 | Opt_D_dump_rn_stats
158 | Opt_D_dump_simpl_stats
159 | Opt_D_dump_tc_trace
160 | Opt_D_dump_if_trace
167 | Opt_D_verbose_core2core
168 | Opt_D_verbose_stg2stg
170 | Opt_D_dump_hi_diffs
171 | Opt_D_dump_minimal_imports
172 | Opt_D_dump_mod_cycles
173 | Opt_D_dump_view_pattern_commoning
174 | Opt_D_faststring_stats
175 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
176 | Opt_D_no_debug_output
182 | Opt_WarnIsError -- -Werror; makes warnings fatal
183 | Opt_WarnDuplicateExports
185 | Opt_WarnImplicitPrelude
186 | Opt_WarnIncompletePatterns
187 | Opt_WarnIncompletePatternsRecUpd
188 | Opt_WarnMissingFields
189 | Opt_WarnMissingImportList
190 | Opt_WarnMissingMethods
191 | Opt_WarnMissingSigs
192 | Opt_WarnMissingLocalSigs
193 | Opt_WarnNameShadowing
194 | Opt_WarnOverlappingPatterns
195 | Opt_WarnTypeDefaults
196 | Opt_WarnMonomorphism
197 | Opt_WarnUnusedBinds
198 | Opt_WarnUnusedImports
199 | Opt_WarnUnusedMatches
200 | Opt_WarnWarningsDeprecations
201 | Opt_WarnDeprecatedFlags
202 | Opt_WarnDodgyExports
203 | Opt_WarnDodgyImports
205 | Opt_WarnAutoOrphans
207 | Opt_WarnUnrecognisedPragmas
208 | Opt_WarnDodgyForeignImports
209 | Opt_WarnLazyUnliftedBindings
210 | Opt_WarnUnusedDoBind
211 | Opt_WarnWrongDoBind
212 | Opt_WarnAlternativeLayoutRuleTransitional
214 | Opt_PrintExplicitForalls
221 | Opt_StaticArgumentTransformation
225 | Opt_DoLambdaEtaExpansion
229 | Opt_UnboxStrictFields
232 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
234 | Opt_RegsGraph -- do graph coloring register allocation
235 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
238 | Opt_IgnoreInterfacePragmas
239 | Opt_OmitInterfacePragmas
240 | Opt_ExposeAllUnfoldings
243 | Opt_AutoSccsOnAllToplevs
244 | Opt_AutoSccsOnExportedToplevs
245 | Opt_AutoSccsOnIndividualCafs
252 | Opt_ExcessPrecision
253 | Opt_EagerBlackHoling
254 | Opt_ReadUserPackageConf
258 | Opt_HideAllPackages
259 | Opt_PrintBindResult
263 | Opt_BreakOnException
265 | Opt_PrintEvldWithShow
266 | Opt_PrintBindContents
269 | Opt_EmitExternalCore
271 | Opt_BuildingCabalPackage
277 | Opt_ConvertToZipCfgAndBack
278 | Opt_AutoLinkPackages
279 | Opt_ImplicitImportQualified
288 | Opt_KeepRawTokenStream
293 data Language = Haskell98 | Haskell2010
297 | Opt_OverlappingInstances
298 | Opt_UndecidableInstances
299 | Opt_IncoherentInstances
300 | Opt_MonomorphismRestriction
303 | Opt_RelaxedPolyRec -- Deprecated
304 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
305 | Opt_ForeignFunctionInterface
306 | Opt_UnliftedFFITypes
307 | Opt_GHCForeignImportPrim
308 | Opt_PArr -- Syntactic support for parallel arrays
309 | Opt_Arrows -- Arrow-notation syntax
310 | Opt_TemplateHaskell
313 | Opt_Generics -- "Derivable type classes"
314 | Opt_ImplicitPrelude
315 | Opt_ScopedTypeVariables
319 | Opt_OverloadedStrings
320 | Opt_DisambiguateRecordFields
321 | Opt_RecordWildCards
326 | Opt_DoAndIfThenElse
328 | Opt_StandaloneDeriving
329 | Opt_DeriveDataTypeable
331 | Opt_DeriveTraversable
334 | Opt_TypeSynonymInstances
335 | Opt_FlexibleContexts
336 | Opt_FlexibleInstances
337 | Opt_ConstrainedClassMethods
338 | Opt_MultiParamTypeClasses
339 | Opt_FunctionalDependencies
341 | Opt_PolymorphicComponents
342 | Opt_ExistentialQuantification
346 | Opt_ParallelListComp
347 | Opt_TransformListComp
348 | Opt_GeneralizedNewtypeDeriving
351 | Opt_PostfixOperators
354 | Opt_LiberalTypeSynonyms
357 | Opt_ImpredicativeTypes
360 | Opt_NewQualifiedOperators
362 | Opt_AlternativeLayoutRule
363 | Opt_AlternativeLayoutRuleTransitional
364 | Opt_DatatypeContexts
367 -- | Contains not only a collection of 'DynFlag's but also a plethora of
368 -- information relating to the compilation of a single file or GHC session
369 data DynFlags = DynFlags {
372 hscTarget :: HscTarget,
373 hscOutName :: String, -- ^ Name of the output file
374 extCoreName :: String, -- ^ Name of the .hcr output file
375 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
376 optLevel :: Int, -- ^ Optimisation level
377 simplPhases :: Int, -- ^ Number of simplifier phases
378 maxSimplIterations :: Int, -- ^ Max simplifier iterations
379 shouldDumpSimplPhase :: Maybe String,
380 ruleCheck :: Maybe String,
381 strictnessBefore :: [Int], -- ^ Additional demand analysis
383 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
384 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
385 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
387 #ifndef OMIT_NATIVE_CODEGEN
388 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
390 stolen_x86_regs :: Int,
391 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
392 importPaths :: [FilePath],
394 mainFunIs :: Maybe String,
395 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
397 dphBackend :: DPHBackend,
399 thisPackage :: PackageId, -- ^ name of package currently being compiled
402 ways :: [Way], -- ^ Way flags from the command line
403 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
404 rtsBuildTag :: String, -- ^ The RTS \"way\"
406 -- For object splitting
407 splitInfo :: Maybe (String,Int),
410 objectDir :: Maybe String,
411 dylibInstallName :: Maybe String,
412 hiDir :: Maybe String,
413 stubDir :: Maybe String,
419 outputFile :: Maybe String,
420 outputHi :: Maybe String,
421 dynLibLoader :: DynLibLoader,
423 -- | This is set by 'DriverPipeline.runPipeline' based on where
424 -- its output is going.
425 dumpPrefix :: Maybe FilePath,
427 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
428 -- Set by @-ddump-file-prefix@
429 dumpPrefixForce :: Maybe FilePath,
431 includePaths :: [String],
432 libraryPaths :: [String],
433 frameworkPaths :: [String], -- used on darwin only
434 cmdlineFrameworks :: [String], -- ditto
435 tmpDir :: String, -- no trailing '/'
437 ghcUsagePath :: FilePath, -- Filled in by SysTools
438 ghciUsagePath :: FilePath, -- ditto
439 rtsOpts :: Maybe String,
440 rtsOptsEnabled :: RtsOptsEnabled,
442 hpcDir :: String, -- ^ Path to store the .mix files
444 -- options for particular phases
452 opt_windres :: [String],
453 opt_lo :: [String], -- LLVM: llvm optimiser
454 opt_lc :: [String], -- LLVM: llc static compiler
456 -- commands for particular phases
458 pgm_P :: (String,[Option]),
460 pgm_c :: (String,[Option]),
461 pgm_m :: (String,[Option]),
462 pgm_s :: (String,[Option]),
463 pgm_a :: (String,[Option]),
464 pgm_l :: (String,[Option]),
465 pgm_dll :: (String,[Option]),
467 pgm_sysman :: String,
468 pgm_windres :: String,
469 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
470 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
473 depMakefile :: FilePath,
474 depIncludePkgDeps :: Bool,
475 depExcludeMods :: [ModuleName],
476 depSuffixes :: [String],
479 extraPkgConfs :: [FilePath],
480 topDir :: FilePath, -- filled in by SysTools
481 systemPackageConfig :: FilePath, -- ditto
482 -- ^ The @-package-conf@ flags given on the command line, in the order
485 packageFlags :: [PackageFlag],
486 -- ^ The @-package@ and @-hide-package@ flags from the command-line
489 -- NB. do not modify this field, it is calculated by
490 -- Packages.initPackages and Packages.updatePackages.
491 pkgDatabase :: Maybe [PackageConfig],
492 pkgState :: PackageState,
495 -- These have to be IORefs, because the defaultCleanupHandler needs to
496 -- know what to clean when an exception happens
497 filesToClean :: IORef [FilePath],
498 dirsToClean :: IORef (Map FilePath FilePath),
502 language :: Maybe Language,
503 extensionFlags :: Either [OnOff ExtensionFlag]
506 -- | Message output action: use "ErrUtils" instead of this if you can
507 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
509 haddockOptions :: Maybe String
512 wayNames :: DynFlags -> [WayName]
513 wayNames = map wayName . ways
515 -- | The target code type of the compilation (if any).
517 -- Whenever you change the target, also make sure to set 'ghcLink' to
518 -- something sensible.
520 -- 'HscNothing' can be used to avoid generating any output, however, note
523 -- * This will not run the desugaring step, thus no warnings generated in
524 -- this step will be output. In particular, this includes warnings related
525 -- to pattern matching. You can run the desugarer manually using
526 -- 'GHC.desugarModule'.
528 -- * If a program uses Template Haskell the typechecker may try to run code
529 -- from an imported module. This will fail if no code has been generated
530 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
531 -- whether this might be the case and choose to either switch to a
532 -- different target or avoid typechecking such modules. (The latter may
533 -- preferable for security reasons.)
536 = HscC -- ^ Generate C code.
537 | HscAsm -- ^ Generate assembly using the native code generator.
538 | HscLlvm -- ^ Generate assembly using the llvm code generator.
539 | HscJava -- ^ Generate Java bytecode.
540 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
541 | HscNothing -- ^ Don't generate any code. See notes above.
544 -- | Will this target result in an object file on the disk?
545 isObjectTarget :: HscTarget -> Bool
546 isObjectTarget HscC = True
547 isObjectTarget HscAsm = True
548 isObjectTarget HscLlvm = True
549 isObjectTarget _ = False
551 -- | The 'GhcMode' tells us whether we're doing multi-module
552 -- compilation (controlled via the "GHC" API) or one-shot
553 -- (single-module) compilation. This makes a difference primarily to
554 -- the "Finder": in one-shot mode we look for interface files for
555 -- imported modules, but in multi-module mode we look for source files
556 -- in order to check whether they need to be recompiled.
558 = CompManager -- ^ @\-\-make@, GHCi, etc.
559 | OneShot -- ^ @ghc -c Foo.hs@
560 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
563 instance Outputable GhcMode where
564 ppr CompManager = ptext (sLit "CompManager")
565 ppr OneShot = ptext (sLit "OneShot")
566 ppr MkDepend = ptext (sLit "MkDepend")
568 isOneShot :: GhcMode -> Bool
569 isOneShot OneShot = True
570 isOneShot _other = False
572 -- | What to do in the link step, if there is one.
574 = NoLink -- ^ Don't link at all
575 | LinkBinary -- ^ Link object code into a binary
576 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
577 -- bytecode and object code).
578 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
581 isNoLink :: GhcLink -> Bool
582 isNoLink NoLink = True
585 -- Is it worth evaluating this Bool and caching it in the DynFlags value
586 -- during initDynFlags?
587 doingTickyProfiling :: DynFlags -> Bool
588 doingTickyProfiling _ = opt_Ticky
589 -- XXX -ticky is a static flag, because it implies -debug which is also
590 -- static. If the way flags were made dynamic, we could fix this.
593 = ExposePackage String
594 | ExposePackageId String
596 | IgnorePackage String
599 defaultHscTarget :: HscTarget
600 defaultHscTarget = defaultObjectTarget
602 -- | The 'HscTarget' value corresponding to the default way to create
603 -- object files on the current platform.
604 defaultObjectTarget :: HscTarget
606 | cGhcWithNativeCodeGen == "YES" = HscAsm
614 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
616 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
617 initDynFlags :: DynFlags -> IO DynFlags
618 initDynFlags dflags = do
619 -- someday these will be dynamic flags
620 ways <- readIORef v_Ways
621 refFilesToClean <- newIORef []
622 refDirsToClean <- newIORef Map.empty
625 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
626 rtsBuildTag = mkBuildTag ways,
627 filesToClean = refFilesToClean,
628 dirsToClean = refDirsToClean
631 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
632 -- and must be fully initialized by 'GHC.newSession' first.
633 defaultDynFlags :: DynFlags
636 ghcMode = CompManager,
637 ghcLink = LinkBinary,
638 hscTarget = defaultHscTarget,
644 maxSimplIterations = 4,
645 shouldDumpSimplPhase = Nothing,
647 specConstrThreshold = Just 200,
648 specConstrCount = Just 3,
649 liberateCaseThreshold = Just 200,
650 strictnessBefore = [],
652 #ifndef OMIT_NATIVE_CODEGEN
653 targetPlatform = defaultTargetPlatform,
656 cmdlineHcIncludes = [],
660 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
664 thisPackage = mainPackageId,
667 dylibInstallName = Nothing,
671 objectSuf = phaseInputExt StopLn,
672 hcSuf = phaseInputExt HCc,
675 outputFile = Nothing,
677 dynLibLoader = SystemDependent,
678 dumpPrefix = Nothing,
679 dumpPrefixForce = Nothing,
683 cmdlineFrameworks = [],
684 tmpDir = cDEFAULT_TMPDIR,
686 rtsOptsEnabled = RtsOptsSafeOnly,
692 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
705 pkgDatabase = Nothing,
706 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
707 ways = panic "defaultDynFlags: No ways",
708 buildTag = panic "defaultDynFlags: No buildTag",
709 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
711 -- initSysTools fills all these in
712 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
713 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
714 topDir = panic "defaultDynFlags: No topDir",
715 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
716 pgm_L = panic "defaultDynFlags: No pgm_L",
717 pgm_P = panic "defaultDynFlags: No pgm_P",
718 pgm_F = panic "defaultDynFlags: No pgm_F",
719 pgm_c = panic "defaultDynFlags: No pgm_c",
720 pgm_m = panic "defaultDynFlags: No pgm_m",
721 pgm_s = panic "defaultDynFlags: No pgm_s",
722 pgm_a = panic "defaultDynFlags: No pgm_a",
723 pgm_l = panic "defaultDynFlags: No pgm_l",
724 pgm_dll = panic "defaultDynFlags: No pgm_dll",
725 pgm_T = panic "defaultDynFlags: No pgm_T",
726 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
727 pgm_windres = panic "defaultDynFlags: No pgm_windres",
728 pgm_lo = panic "defaultDynFlags: No pgm_lo",
729 pgm_lc = panic "defaultDynFlags: No pgm_lc",
730 -- end of initSysTools values
732 depMakefile = "Makefile",
733 depIncludePkgDeps = False,
736 -- end of ghc -M values
737 filesToClean = panic "defaultDynFlags: No filesToClean",
738 dirsToClean = panic "defaultDynFlags: No dirsToClean",
739 haddockOptions = Nothing,
740 flags = defaultFlags,
742 extensionFlags = Left [],
744 log_action = \severity srcSpan style msg ->
746 SevOutput -> printOutput (msg style)
747 SevInfo -> printErrs (msg style)
748 SevFatal -> printErrs (msg style)
751 printErrs ((mkLocMessage srcSpan msg) style)
752 -- careful (#2302): printErrs prints in UTF-8, whereas
753 -- converting to string first and using hPutStr would
754 -- just emit the low 8 bits of each unicode char.
758 Note [Verbosity levels]
759 ~~~~~~~~~~~~~~~~~~~~~~~
760 0 | print errors & warnings only
761 1 | minimal verbosity: print "compiling M ... done." for each module.
762 2 | equivalent to -dshow-passes
763 3 | equivalent to existing "ghc -v"
764 4 | "ghc -v -ddump-most"
765 5 | "ghc -v -ddump-all"
771 flattenExtensionFlags :: DynFlags -> DynFlags
772 flattenExtensionFlags dflags
773 = case extensionFlags dflags of
776 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
779 panic "Flattening already-flattened extension flags"
781 ensureFlattenedExtensionFlags :: DynFlags -> DynFlags
782 ensureFlattenedExtensionFlags dflags
783 = case extensionFlags dflags of
786 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
791 -- OnOffs accumulate in reverse order, so we use foldr in order to
792 -- process them in the right order
793 flattenExtensionFlags' :: Maybe Language -> [OnOff ExtensionFlag]
795 flattenExtensionFlags' ml = foldr f defaultExtensionFlags
796 where f (On f) flags = f : delete f flags
797 f (Off f) flags = delete f flags
798 defaultExtensionFlags = languageExtensions ml
800 languageExtensions :: Maybe Language -> [ExtensionFlag]
801 languageExtensions Nothing
802 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
803 -- behaviour the default, to see if anyone notices
805 -- In due course I'd like Opt_MonoLocalBinds to be on by default
806 -- But NB it's implied by GADTs etc
807 -- SLPJ September 2010
808 : languageExtensions (Just Haskell2010)
809 languageExtensions (Just Haskell98)
810 = [Opt_ImplicitPrelude,
811 Opt_MonomorphismRestriction,
813 Opt_DatatypeContexts]
814 languageExtensions (Just Haskell2010)
815 = [Opt_ImplicitPrelude,
816 Opt_MonomorphismRestriction,
817 Opt_DatatypeContexts,
819 Opt_ForeignFunctionInterface,
824 -- | Test whether a 'DynFlag' is set
825 dopt :: DynFlag -> DynFlags -> Bool
826 dopt f dflags = f `elem` (flags dflags)
829 dopt_set :: DynFlags -> DynFlag -> DynFlags
830 dopt_set dfs f = dfs{ flags = f : flags dfs }
832 -- | Unset a 'DynFlag'
833 dopt_unset :: DynFlags -> DynFlag -> DynFlags
834 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
836 -- | Test whether a 'ExtensionFlag' is set
837 xopt :: ExtensionFlag -> DynFlags -> Bool
838 xopt f dflags = case extensionFlags dflags of
839 Left _ -> panic ("Testing for extension flag " ++ show f ++ " before flattening")
840 Right flags -> f `elem` flags
842 -- | Set a 'ExtensionFlag'
843 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
844 xopt_set dfs f = case extensionFlags dfs of
845 Left onoffs -> dfs { extensionFlags = Left (On f : onoffs) }
846 Right _ -> panic ("Setting extension flag " ++ show f ++ " after flattening")
848 -- | Set a 'ExtensionFlag'
849 xopt_set_flattened :: DynFlags -> ExtensionFlag -> DynFlags
850 xopt_set_flattened dfs f = case extensionFlags dfs of
852 panic ("Setting extension flag " ++ show f ++ " before flattening, but expected flattened")
854 dfs { extensionFlags = Right (f : delete f flags) }
856 -- | Unset a 'ExtensionFlag'
857 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
858 xopt_unset dfs f = case extensionFlags dfs of
859 Left onoffs -> dfs { extensionFlags = Left (Off f : onoffs) }
860 Right _ -> panic ("Unsetting extension flag " ++ show f ++ " after flattening")
862 -- | Unset a 'ExtensionFlag'
863 xopt_unset_flattened :: DynFlags -> ExtensionFlag -> DynFlags
864 xopt_unset_flattened dfs f = case extensionFlags dfs of
866 panic ("Unsetting extension flag " ++ show f ++ " before flattening, but expected flattened")
868 dfs { extensionFlags = Right (delete f flags) }
870 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
871 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
872 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
873 -> [a] -- ^ Correctly ordered extracted options
874 getOpts dflags opts = reverse (opts dflags)
875 -- We add to the options from the front, so we need to reverse the list
877 -- | Gets the verbosity flag for the current verbosity level. This is fed to
878 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
879 getVerbFlag :: DynFlags -> String
881 | verbosity dflags >= 3 = "-v"
884 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
885 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
886 setPgmP, addOptl, addOptP,
887 addCmdlineFramework, addHaddockOpts
888 :: String -> DynFlags -> DynFlags
889 setOutputFile, setOutputHi, setDumpPrefixForce
890 :: Maybe String -> DynFlags -> DynFlags
892 setObjectDir f d = d{ objectDir = Just f}
893 setHiDir f d = d{ hiDir = Just f}
894 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
895 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
896 -- \#included from the .hc file when compiling with -fvia-C.
897 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
898 setDylibInstallName f d = d{ dylibInstallName = Just f}
900 setObjectSuf f d = d{ objectSuf = f}
901 setHiSuf f d = d{ hiSuf = f}
902 setHcSuf f d = d{ hcSuf = f}
904 setOutputFile f d = d{ outputFile = f}
905 setOutputHi f d = d{ outputHi = f}
907 parseDynLibLoaderMode f d =
909 ("deploy", "") -> d{ dynLibLoader = Deployable }
910 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
911 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
913 setDumpPrefixForce f d = d { dumpPrefixForce = f}
915 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
916 -- Config.hs should really use Option.
917 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
918 addOptl f d = d{ opt_l = f : opt_l d}
919 addOptP f d = d{ opt_P = f : opt_P d}
922 setDepMakefile :: FilePath -> DynFlags -> DynFlags
923 setDepMakefile f d = d { depMakefile = deOptDep f }
925 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
926 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
928 addDepExcludeMod :: String -> DynFlags -> DynFlags
930 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
932 addDepSuffix :: FilePath -> DynFlags -> DynFlags
933 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
936 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
937 -- we need to strip the "-optdep" off of the arg
938 deOptDep :: String -> String
939 deOptDep x = case stripPrefix "-optdep" x of
943 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
945 addHaddockOpts f d = d{ haddockOptions = Just f}
947 -- -----------------------------------------------------------------------------
948 -- Command-line options
950 -- | When invoking external tools as part of the compilation pipeline, we
951 -- pass these a sequence of options on the command-line. Rather than
952 -- just using a list of Strings, we use a type that allows us to distinguish
953 -- between filepaths and 'other stuff'. The reason for this is that
954 -- this type gives us a handle on transforming filenames, and filenames only,
955 -- to whatever format they're expected to be on a particular platform.
957 = FileOption -- an entry that _contains_ filename(s) / filepaths.
958 String -- a non-filepath prefix that shouldn't be
959 -- transformed (e.g., "/out=")
960 String -- the filepath/filename portion
963 showOpt :: Option -> String
964 showOpt (FileOption pre f) = pre ++ f
965 showOpt (Option s) = s
967 -----------------------------------------------------------------------------
968 -- Setting the optimisation level
970 updOptLevel :: Int -> DynFlags -> DynFlags
971 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
973 = dfs2{ optLevel = final_n }
975 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
976 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
977 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
979 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
980 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
982 -- -----------------------------------------------------------------------------
983 -- StgToDo: abstraction of stg-to-stg passes to run.
986 = StgDoMassageForProfiling -- should be (next to) last
987 -- There's also setStgVarInfo, but its absolute "lastness"
988 -- is so critical that it is hardwired in (no flag).
991 getStgToDo :: DynFlags -> [StgToDo]
995 stg_stats = dopt Opt_StgStats dflags
997 todo1 = if stg_stats then [D_stg_stats] else []
999 todo2 | WayProf `elem` wayNames dflags
1000 = StgDoMassageForProfiling : todo1
1004 {- **********************************************************************
1008 %********************************************************************* -}
1010 -- -----------------------------------------------------------------------------
1011 -- Parsing the dynamic flags.
1013 -- | Parse dynamic flags from a list of command line arguments. Returns the
1014 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1015 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1016 -- flags or missing arguments).
1017 parseDynamicFlags :: Monad m =>
1018 DynFlags -> [Located String]
1019 -> m (DynFlags, [Located String], [Located String])
1020 -- ^ Updated 'DynFlags', left-over arguments, and
1021 -- list of warnings.
1022 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1024 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1025 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1026 parseDynamicNoPackageFlags :: Monad m =>
1027 DynFlags -> [Located String]
1028 -> m (DynFlags, [Located String], [Located String])
1029 -- ^ Updated 'DynFlags', left-over arguments, and
1030 -- list of warnings.
1031 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1033 parseDynamicFlags_ :: Monad m =>
1034 DynFlags -> [Located String] -> Bool
1035 -> m (DynFlags, [Located String], [Located String])
1036 parseDynamicFlags_ dflags0 args pkg_flags = do
1037 -- XXX Legacy support code
1038 -- We used to accept things like
1039 -- optdep-f -optdepdepend
1040 -- optdep-f -optdep depend
1041 -- optdep -f -optdepdepend
1042 -- optdep -f -optdep depend
1043 -- but the spaces trip up proper argument handling. So get rid of them.
1044 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1045 f (x : xs) = x : f xs
1049 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1050 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1051 | otherwise = dynamic_flags
1053 let ((leftover, errs, warns), dflags1)
1054 = runCmdLine (processArgs flag_spec args') dflags0
1055 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1057 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1058 -- isn't up to the job. We know that if hscTarget == HscC, then the
1059 -- user has explicitly used -fvia-C, because -fasm is the default,
1060 -- unless there is no NCG on this platform. The latter case is
1061 -- checked when the -fPIC flag is parsed.
1063 let (pic_warns, dflags2)
1064 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1065 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1066 dflags1{ hscTarget = HscAsm })
1067 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1068 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1069 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1070 ++ "dynamic on this platform;\n ignoring -fllvm"],
1071 dflags1{ hscTarget = HscAsm })
1073 | otherwise = ([], dflags1)
1075 return (dflags2, leftover, pic_warns ++ warns)
1078 {- **********************************************************************
1080 DynFlags specifications
1082 %********************************************************************* -}
1084 allFlags :: [String]
1085 allFlags = map ('-':) $
1086 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1087 map ("fno-"++) flags ++
1088 map ("f"++) flags ++
1089 map ("f"++) flags' ++
1090 map ("X"++) supportedExtensions
1091 where ok (PrefixPred _ _) = False
1093 flags = [ name | (name, _, _) <- fFlags ]
1094 flags' = [ name | (name, _, _) <- fLangFlags ]
1096 --------------- The main flags themselves ------------------
1097 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1099 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1100 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1101 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1103 (HasArg (\s -> do { addCmdlineHCInclude s
1104 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1105 , Flag "v" (OptIntSuffix setVerbosity)
1107 ------- Specific phases --------------------------------------------
1108 -- need to appear before -pgmL to be parsed as LLVM flags.
1109 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1110 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1111 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1112 , Flag "pgmP" (hasArg setPgmP)
1113 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1114 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1115 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1116 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1117 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1118 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1119 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1120 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1122 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1123 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1124 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1125 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1126 , Flag "optP" (hasArg addOptP)
1127 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1128 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1129 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1130 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1131 , Flag "optl" (hasArg addOptl)
1132 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1135 (NoArg (if can_split
1136 then setDynFlag Opt_SplitObjs
1137 else addWarn "ignoring -fsplit-objs"))
1139 -------- ghc -M -----------------------------------------------------
1140 , Flag "dep-suffix" (hasArg addDepSuffix)
1141 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1142 , Flag "dep-makefile" (hasArg setDepMakefile)
1143 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1144 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1145 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1146 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1147 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1148 , Flag "exclude-module" (hasArg addDepExcludeMod)
1149 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1150 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1152 -------- Linking ----------------------------------------------------
1153 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1154 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1155 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1156 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1158 ------- Libraries ---------------------------------------------------
1159 , Flag "L" (Prefix addLibraryPath)
1160 , Flag "l" (AnySuffix (upd . addOptl))
1162 ------- Frameworks --------------------------------------------------
1163 -- -framework-path should really be -F ...
1164 , Flag "framework-path" (HasArg addFrameworkPath)
1165 , Flag "framework" (hasArg addCmdlineFramework)
1167 ------- Output Redirection ------------------------------------------
1168 , Flag "odir" (hasArg setObjectDir)
1169 , Flag "o" (SepArg (upd . setOutputFile . Just))
1170 , Flag "ohi" (hasArg (setOutputHi . Just ))
1171 , Flag "osuf" (hasArg setObjectSuf)
1172 , Flag "hcsuf" (hasArg setHcSuf)
1173 , Flag "hisuf" (hasArg setHiSuf)
1174 , Flag "hidir" (hasArg setHiDir)
1175 , Flag "tmpdir" (hasArg setTmpDir)
1176 , Flag "stubdir" (hasArg setStubDir)
1177 , Flag "outputdir" (hasArg setOutputDir)
1178 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1180 ------- Keeping temporary files -------------------------------------
1181 -- These can be singular (think ghc -c) or plural (think ghc --make)
1182 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1183 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1184 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1185 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1186 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1187 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1188 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1189 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1190 -- This only makes sense as plural
1191 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1193 ------- Miscellaneous ----------------------------------------------
1194 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1195 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1196 , Flag "with-rtsopts" (HasArg setRtsOpts)
1197 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1198 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1199 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1200 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1201 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1202 , Flag "main-is" (SepArg setMainIs)
1203 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1204 , Flag "haddock-opts" (hasArg addHaddockOpts)
1205 , Flag "hpcdir" (SepArg setOptHpcDir)
1207 ------- recompilation checker --------------------------------------
1208 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1209 ; deprecate "Use -fno-force-recomp instead" }))
1210 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1211 ; deprecate "Use -fforce-recomp instead" }))
1213 ------ HsCpp opts ---------------------------------------------------
1214 , Flag "D" (AnySuffix (upd . addOptP))
1215 , Flag "U" (AnySuffix (upd . addOptP))
1217 ------- Include/Import Paths ----------------------------------------
1218 , Flag "I" (Prefix addIncludePath)
1219 , Flag "i" (OptPrefix addImportPath)
1221 ------ Debugging ----------------------------------------------------
1222 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1224 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1225 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1226 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1227 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1228 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1229 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1230 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1231 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1232 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1233 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1234 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1235 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1236 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1237 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1238 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1239 ; setDumpFlag' Opt_D_dump_llvm}))
1240 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1241 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1242 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1243 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1244 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1245 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1246 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1247 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1248 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1249 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1250 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1251 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1252 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1253 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1254 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1255 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1256 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1257 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1258 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1259 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1260 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1261 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1262 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1263 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1264 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1265 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1266 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1267 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1268 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1269 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1270 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1271 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1272 ; setVerboseCore2Core }))
1273 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1274 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1275 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1276 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1277 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1278 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1279 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1280 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1281 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1282 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1283 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1284 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1285 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1286 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1287 , Flag "dshow-passes" (NoArg (do forceRecompile
1288 setVerbosity (Just 2)))
1289 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1291 ------ Machine dependant (-m<blah>) stuff ---------------------------
1293 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1294 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1295 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1296 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1298 ------ Warning opts -------------------------------------------------
1299 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1300 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1301 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1302 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1303 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1304 ; deprecate "Use -w instead" }))
1305 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1307 ------ Optimisation flags ------------------------------------------
1308 , Flag "O" (noArg (setOptLevel 1))
1309 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1310 , Flag "Odph" (noArg setDPHOpt)
1311 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1312 -- If the number is missing, use 1
1314 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1315 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1316 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1317 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1318 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1319 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1320 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1321 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1322 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1323 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1324 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1326 ------ Profiling ----------------------------------------------------
1328 -- XXX Should the -f* flags be deprecated?
1329 -- They don't seem to be documented
1330 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1331 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1332 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1333 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1334 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1335 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1336 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1337 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1338 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1340 ------ DPH flags ----------------------------------------------------
1342 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1343 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1344 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1346 ------ Compiler flags -----------------------------------------------
1348 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1349 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1350 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1351 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1352 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1353 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1355 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1356 setTarget HscNothing))
1357 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1358 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1359 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1360 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1362 ++ map (mkFlag True "f" setDynFlag ) fFlags
1363 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1364 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1365 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1366 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1367 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1368 ++ map (mkFlag True "X" setLanguage) languageFlags
1370 package_flags :: [Flag (CmdLineP DynFlags)]
1372 ------- Packages ----------------------------------------------------
1373 Flag "package-conf" (HasArg extraPkgConf_)
1374 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1375 , Flag "package-name" (hasArg setPackageName)
1376 , Flag "package-id" (HasArg exposePackageId)
1377 , Flag "package" (HasArg exposePackage)
1378 , Flag "hide-package" (HasArg hidePackage)
1379 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1380 , Flag "ignore-package" (HasArg ignorePackage)
1381 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1382 ; deprecate "Use -package instead" }))
1386 = ( String -- Flag in string form
1387 , flag -- Flag in internal form
1388 , Bool -> DynP ()) -- Extra action to run when the flag is found
1389 -- Typically, emit a warning or error
1390 -- True <=> we are turning the flag on
1391 -- False <=> we are turning the flag off
1394 mkFlag :: Bool -- ^ True <=> it should be turned on
1395 -> String -- ^ The flag prefix
1396 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1397 -> FlagSpec flag -- ^ Specification of this particular flag
1398 -> Flag (CmdLineP DynFlags)
1399 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1400 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1402 deprecatedForExtension :: String -> Bool -> DynP ()
1403 deprecatedForExtension lang turn_on
1404 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1406 flag | turn_on = lang
1407 | otherwise = "No"++lang
1409 useInstead :: String -> Bool -> DynP ()
1410 useInstead flag turn_on
1411 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1413 no = if turn_on then "" else "no-"
1415 nop :: Bool -> DynP ()
1418 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1419 fFlags :: [FlagSpec DynFlag]
1421 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1422 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1423 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1424 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1425 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1426 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1427 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1428 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1429 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1430 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1431 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1432 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1433 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1434 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1435 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1436 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1437 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1438 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1439 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1440 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1441 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1442 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1443 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1444 ( "warn-orphans", Opt_WarnOrphans, nop ),
1445 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1446 ( "warn-tabs", Opt_WarnTabs, nop ),
1447 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1448 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1449 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1450 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1451 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1452 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1453 ( "strictness", Opt_Strictness, nop ),
1454 ( "specialise", Opt_Specialise, nop ),
1455 ( "float-in", Opt_FloatIn, nop ),
1456 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1457 ( "full-laziness", Opt_FullLaziness, nop ),
1458 ( "liberate-case", Opt_LiberateCase, nop ),
1459 ( "spec-constr", Opt_SpecConstr, nop ),
1460 ( "cse", Opt_CSE, nop ),
1461 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1462 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1463 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1464 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1465 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1466 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1467 ( "case-merge", Opt_CaseMerge, nop ),
1468 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1469 ( "method-sharing", Opt_MethodSharing, nop ),
1470 ( "dicts-cheap", Opt_DictsCheap, nop ),
1471 ( "excess-precision", Opt_ExcessPrecision, nop ),
1472 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1473 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1474 ( "print-bind-result", Opt_PrintBindResult, nop ),
1475 ( "force-recomp", Opt_ForceRecomp, nop ),
1476 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1477 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1478 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1479 ( "break-on-exception", Opt_BreakOnException, nop ),
1480 ( "break-on-error", Opt_BreakOnError, nop ),
1481 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1482 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1483 ( "run-cps", Opt_RunCPS, nop ),
1484 ( "run-cpsz", Opt_RunCPSZ, nop ),
1485 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1486 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1487 ( "vectorise", Opt_Vectorise, nop ),
1488 ( "regs-graph", Opt_RegsGraph, nop ),
1489 ( "regs-iterative", Opt_RegsIterative, nop ),
1490 ( "gen-manifest", Opt_GenManifest, nop ),
1491 ( "embed-manifest", Opt_EmbedManifest, nop ),
1492 ( "ext-core", Opt_EmitExternalCore, nop ),
1493 ( "shared-implib", Opt_SharedImplib, nop ),
1494 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1495 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1498 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1499 fLangFlags :: [FlagSpec ExtensionFlag]
1501 ( "th", Opt_TemplateHaskell,
1502 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1503 ( "fi", Opt_ForeignFunctionInterface,
1504 deprecatedForExtension "ForeignFunctionInterface" ),
1505 ( "ffi", Opt_ForeignFunctionInterface,
1506 deprecatedForExtension "ForeignFunctionInterface" ),
1507 ( "arrows", Opt_Arrows,
1508 deprecatedForExtension "Arrows" ),
1509 ( "generics", Opt_Generics,
1510 deprecatedForExtension "Generics" ),
1511 ( "implicit-prelude", Opt_ImplicitPrelude,
1512 deprecatedForExtension "ImplicitPrelude" ),
1513 ( "bang-patterns", Opt_BangPatterns,
1514 deprecatedForExtension "BangPatterns" ),
1515 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1516 deprecatedForExtension "MonomorphismRestriction" ),
1517 ( "mono-pat-binds", Opt_MonoPatBinds,
1518 deprecatedForExtension "MonoPatBinds" ),
1519 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1520 deprecatedForExtension "ExtendedDefaultRules" ),
1521 ( "implicit-params", Opt_ImplicitParams,
1522 deprecatedForExtension "ImplicitParams" ),
1523 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1524 deprecatedForExtension "ScopedTypeVariables" ),
1526 deprecatedForExtension "PArr" ),
1527 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1528 deprecatedForExtension "OverlappingInstances" ),
1529 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1530 deprecatedForExtension "UndecidableInstances" ),
1531 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1532 deprecatedForExtension "IncoherentInstances" )
1535 supportedLanguages :: [String]
1536 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1538 supportedExtensions :: [String]
1539 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1541 supportedLanguagesAndExtensions :: [String]
1542 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1544 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1545 languageFlags :: [FlagSpec Language]
1547 ( "Haskell98", Haskell98, nop ),
1548 ( "Haskell2010", Haskell2010, nop )
1551 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1552 xFlags :: [FlagSpec ExtensionFlag]
1554 ( "CPP", Opt_Cpp, nop ),
1555 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1556 ( "TupleSections", Opt_TupleSections, nop ),
1557 ( "PatternGuards", Opt_PatternGuards, nop ),
1558 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1559 ( "MagicHash", Opt_MagicHash, nop ),
1560 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1561 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1562 ( "KindSignatures", Opt_KindSignatures, nop ),
1563 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1564 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1565 ( "TransformListComp", Opt_TransformListComp, nop ),
1566 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1567 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1568 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1569 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1570 ( "Rank2Types", Opt_Rank2Types, nop ),
1571 ( "RankNTypes", Opt_RankNTypes, nop ),
1572 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1573 ( "TypeOperators", Opt_TypeOperators, nop ),
1574 ( "RecursiveDo", Opt_RecursiveDo,
1575 deprecatedForExtension "DoRec"),
1576 ( "DoRec", Opt_DoRec, nop ),
1577 ( "Arrows", Opt_Arrows, nop ),
1578 ( "PArr", Opt_PArr, nop ),
1579 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1580 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1581 ( "Generics", Opt_Generics, nop ),
1582 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1583 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1584 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1585 ( "RecordPuns", Opt_RecordPuns,
1586 deprecatedForExtension "NamedFieldPuns" ),
1587 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1588 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1589 ( "GADTs", Opt_GADTs, nop ),
1590 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1591 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1592 ( "BangPatterns", Opt_BangPatterns, nop ),
1593 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1594 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1595 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1596 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1597 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1598 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1599 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1600 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1601 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1602 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1603 \ turn_on -> if not turn_on
1604 then deprecate "You can't turn off RelaxedPolyRec any more"
1606 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1607 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1608 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1610 ( "PatternSignatures", Opt_ScopedTypeVariables,
1611 deprecatedForExtension "ScopedTypeVariables" ),
1613 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1614 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1615 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1616 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1617 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1618 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1619 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1620 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1621 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1622 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1623 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1624 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1625 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1626 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1627 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1628 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1629 ( "PackageImports", Opt_PackageImports, nop ),
1630 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1631 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1634 defaultFlags :: [DynFlag]
1636 = [ Opt_AutoLinkPackages,
1637 Opt_ReadUserPackageConf,
1647 Opt_PrintBindContents
1650 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1651 -- The default -O0 options
1655 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1657 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1658 , (Opt_Rank2Types, Opt_ExplicitForAll)
1659 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1660 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1661 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1662 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1664 , (Opt_GADTs, Opt_MonoLocalBinds)
1665 , (Opt_TypeFamilies, Opt_MonoLocalBinds)
1667 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1668 -- all over the place
1670 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1672 -- Record wild-cards implies field disambiguation
1673 -- Otherwise if you write (C {..}) you may well get
1674 -- stuff like " 'a' not in scope ", which is a bit silly
1675 -- if the compiler has just filled in field 'a' of constructor 'C'
1676 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1679 optLevelFlags :: [([Int], DynFlag)]
1681 = [ ([0], Opt_IgnoreInterfacePragmas)
1682 , ([0], Opt_OmitInterfacePragmas)
1684 , ([1,2], Opt_IgnoreAsserts)
1685 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1687 , ([1,2], Opt_DoEtaReduction)
1688 , ([1,2], Opt_CaseMerge)
1689 , ([1,2], Opt_Strictness)
1691 , ([1,2], Opt_FullLaziness)
1692 , ([1,2], Opt_Specialise)
1693 , ([1,2], Opt_FloatIn)
1695 , ([2], Opt_LiberateCase)
1696 , ([2], Opt_SpecConstr)
1697 , ([2], Opt_RegsGraph)
1699 -- , ([2], Opt_StaticArgumentTransformation)
1700 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1701 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1702 -- several improvements to the heuristics, and I'm concerned that without
1703 -- those changes SAT will interfere with some attempts to write "high
1704 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1705 -- this year. In particular, the version in HEAD lacks the tail call
1706 -- criterion, so many things that look like reasonable loops will be
1707 -- turned into functions with extra (unneccesary) thunk creation.
1709 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1710 -- This one is important for a tiresome reason:
1711 -- we want to make sure that the bindings for data
1712 -- constructors are eta-expanded. This is probably
1713 -- a good thing anyway, but it seems fragile.
1716 -- -----------------------------------------------------------------------------
1717 -- Standard sets of warning options
1719 standardWarnings :: [DynFlag]
1721 = [ Opt_WarnWarningsDeprecations,
1722 Opt_WarnDeprecatedFlags,
1723 Opt_WarnUnrecognisedPragmas,
1724 Opt_WarnOverlappingPatterns,
1725 Opt_WarnMissingFields,
1726 Opt_WarnMissingMethods,
1727 Opt_WarnDuplicateExports,
1728 Opt_WarnLazyUnliftedBindings,
1729 Opt_WarnDodgyForeignImports,
1730 Opt_WarnWrongDoBind,
1731 Opt_WarnAlternativeLayoutRuleTransitional
1734 minusWOpts :: [DynFlag]
1736 = standardWarnings ++
1737 [ Opt_WarnUnusedBinds,
1738 Opt_WarnUnusedMatches,
1739 Opt_WarnUnusedImports,
1740 Opt_WarnIncompletePatterns,
1741 Opt_WarnDodgyExports,
1742 Opt_WarnDodgyImports
1745 minusWallOpts :: [DynFlag]
1748 [ Opt_WarnTypeDefaults,
1749 Opt_WarnNameShadowing,
1750 Opt_WarnMissingSigs,
1753 Opt_WarnUnusedDoBind
1756 -- minuswRemovesOpts should be every warning option
1757 minuswRemovesOpts :: [DynFlag]
1760 [Opt_WarnImplicitPrelude,
1761 Opt_WarnIncompletePatternsRecUpd,
1762 Opt_WarnMonomorphism,
1763 Opt_WarnUnrecognisedPragmas,
1764 Opt_WarnAutoOrphans,
1768 enableGlasgowExts :: DynP ()
1769 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1770 mapM_ setExtensionFlag glasgowExtsFlags
1772 disableGlasgowExts :: DynP ()
1773 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1774 mapM_ unSetExtensionFlag glasgowExtsFlags
1776 glasgowExtsFlags :: [ExtensionFlag]
1777 glasgowExtsFlags = [
1778 Opt_ForeignFunctionInterface
1779 , Opt_UnliftedFFITypes
1780 , Opt_ImplicitParams
1781 , Opt_ScopedTypeVariables
1783 , Opt_TypeSynonymInstances
1784 , Opt_StandaloneDeriving
1785 , Opt_DeriveDataTypeable
1787 , Opt_DeriveFoldable
1788 , Opt_DeriveTraversable
1789 , Opt_FlexibleContexts
1790 , Opt_FlexibleInstances
1791 , Opt_ConstrainedClassMethods
1792 , Opt_MultiParamTypeClasses
1793 , Opt_FunctionalDependencies
1795 , Opt_PolymorphicComponents
1796 , Opt_ExistentialQuantification
1798 , Opt_PostfixOperators
1800 , Opt_LiberalTypeSynonyms
1804 , Opt_ParallelListComp
1805 , Opt_EmptyDataDecls
1806 , Opt_KindSignatures
1807 , Opt_GeneralizedNewtypeDeriving ]
1810 -- Consult the RTS to find whether GHC itself has been built profiled
1811 -- If so, you can't use Template Haskell
1812 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1814 rtsIsProfiled :: Bool
1815 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1817 checkTemplateHaskellOk :: Bool -> DynP ()
1818 checkTemplateHaskellOk turn_on
1819 | turn_on && rtsIsProfiled
1820 = addErr "You can't use Template Haskell with a profiled compiler"
1824 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1825 -- so we simply say "ok". It doesn't matter because TH isn't
1826 -- available in stage 1 anyway.
1827 checkTemplateHaskellOk turn_on = return ()
1830 {- **********************************************************************
1832 DynFlags constructors
1834 %********************************************************************* -}
1836 type DynP = EwM (CmdLineP DynFlags)
1838 upd :: (DynFlags -> DynFlags) -> DynP ()
1839 upd f = liftEwM (do { dfs <- getCmdLineState
1840 ; putCmdLineState $! (f dfs) })
1842 --------------- Constructor functions for OptKind -----------------
1843 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1844 noArg fn = NoArg (upd fn)
1846 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1847 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1849 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1850 hasArg fn = HasArg (upd . fn)
1852 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1853 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1854 ; deprecate deprec })
1856 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1857 intSuffix fn = IntSuffix (\n -> upd (fn n))
1859 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1860 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1862 --------------------------
1863 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1864 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1865 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1867 --------------------------
1868 setLanguage :: Language -> DynP ()
1869 setLanguage l = upd (\dfs -> dfs { language = Just l })
1871 --------------------------
1872 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1873 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1874 ; mapM_ setExtensionFlag deps }
1876 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1877 -- When you set f, set the ones it implies
1878 -- NB: use setExtensionFlag recursively, in case the implied flags
1879 -- implies further flags
1880 -- When you un-set f, however, we don't un-set the things it implies
1881 -- (except for -fno-glasgow-exts, which is treated specially)
1883 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1885 --------------------------
1886 setDumpFlag' :: DynFlag -> DynP ()
1887 setDumpFlag' dump_flag
1888 = do { setDynFlag dump_flag
1889 ; when want_recomp forceRecompile }
1891 -- Certain dumpy-things are really interested in what's going
1892 -- on during recompilation checking, so in those cases we
1893 -- don't want to turn it off.
1894 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1895 Opt_D_dump_hi_diffs]
1897 forceRecompile :: DynP ()
1898 -- Whenver we -ddump, force recompilation (by switching off the
1899 -- recompilation checker), else you don't see the dump! However,
1900 -- don't switch it off in --make mode, else *everything* gets
1901 -- recompiled which probably isn't what you want
1902 forceRecompile = do { dfs <- liftEwM getCmdLineState
1903 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1905 force_recomp dfs = isOneShot (ghcMode dfs)
1907 setVerboseCore2Core :: DynP ()
1908 setVerboseCore2Core = do forceRecompile
1909 setDynFlag Opt_D_verbose_core2core
1910 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1913 setDumpSimplPhases :: String -> DynP ()
1914 setDumpSimplPhases s = do forceRecompile
1915 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1917 spec = case s of { ('=' : s') -> s'; _ -> s }
1919 setVerbosity :: Maybe Int -> DynP ()
1920 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1922 addCmdlineHCInclude :: String -> DynP ()
1923 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1925 extraPkgConf_ :: FilePath -> DynP ()
1926 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1928 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1930 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1932 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1934 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1936 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1938 setPackageName :: String -> DynFlags -> DynFlags
1939 setPackageName p s = s{ thisPackage = stringToPackageId p }
1941 -- If we're linking a binary, then only targets that produce object
1942 -- code are allowed (requests for other target types are ignored).
1943 setTarget :: HscTarget -> DynP ()
1944 setTarget l = upd set
1947 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1950 -- Changes the target only if we're compiling object code. This is
1951 -- used by -fasm and -fvia-C, which switch from one to the other, but
1952 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1953 -- can be safely used in an OPTIONS_GHC pragma.
1954 setObjTarget :: HscTarget -> DynP ()
1955 setObjTarget l = upd set
1958 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1961 setOptLevel :: Int -> DynFlags -> DynFlags
1962 setOptLevel n dflags
1963 | hscTarget dflags == HscInterpreted && n > 0
1965 -- not in IO any more, oh well:
1966 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1968 = updOptLevel n dflags
1971 -- -Odph is equivalent to
1973 -- -O2 optimise as much as possible
1974 -- -fno-method-sharing sharing specialisation defeats fusion
1976 -- -fdicts-cheap always inline dictionaries
1977 -- -fmax-simplifier-iterations20 this is necessary sometimes
1978 -- -fsimplifier-phases=3 we use an additional simplifier phase
1980 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1981 -- -fno-spec-constr-count SpecConstr as much as possible
1982 -- -finline-enough-args hack to prevent excessive inlining
1984 setDPHOpt :: DynFlags -> DynFlags
1985 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1987 , specConstrThreshold = Nothing
1988 , specConstrCount = Nothing
1990 `dopt_set` Opt_DictsCheap
1991 `dopt_unset` Opt_MethodSharing
1993 data DPHBackend = DPHPar
1996 deriving(Eq, Ord, Enum, Show)
1998 setDPHBackend :: DPHBackend -> DynP ()
1999 setDPHBackend backend
2001 upd $ \dflags -> dflags { dphBackend = backend }
2002 mapM_ exposePackage (dph_packages backend)
2004 dph_packages DPHThis = []
2005 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2006 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2008 dphPackage :: DynFlags -> PackageId
2009 dphPackage dflags = case dphBackend dflags of
2010 DPHPar -> dphParPackageId
2011 DPHSeq -> dphSeqPackageId
2012 DPHThis -> thisPackage dflags
2014 setMainIs :: String -> DynP ()
2016 | not (null main_fn) && isLower (head main_fn)
2017 -- The arg looked like "Foo.Bar.baz"
2018 = upd $ \d -> d{ mainFunIs = Just main_fn,
2019 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2021 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2022 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2024 | otherwise -- The arg looked like "baz"
2025 = upd $ \d -> d{ mainFunIs = Just arg }
2027 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2029 -----------------------------------------------------------------------------
2030 -- Paths & Libraries
2032 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2034 -- -i on its own deletes the import paths
2035 addImportPath "" = upd (\s -> s{importPaths = []})
2036 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2040 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2043 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2045 addFrameworkPath p =
2046 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2048 #ifndef mingw32_TARGET_OS
2049 split_marker :: Char
2050 split_marker = ':' -- not configurable (ToDo)
2053 splitPathList :: String -> [String]
2054 splitPathList s = filter notNull (splitUp s)
2055 -- empty paths are ignored: there might be a trailing
2056 -- ':' in the initial list, for example. Empty paths can
2057 -- cause confusion when they are translated into -I options
2058 -- for passing to gcc.
2060 #ifndef mingw32_TARGET_OS
2061 splitUp xs = split split_marker xs
2063 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2065 -- That is, if "foo:bar:baz" is used, this interpreted as
2066 -- consisting of three entries, 'foo', 'bar', 'baz'.
2067 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2068 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2070 -- Notice that no attempt is made to fully replace the 'standard'
2071 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2072 -- that this will cause too much breakage for users & ':' will
2073 -- work fine even with DOS paths, if you're not insisting on being silly.
2076 splitUp (x:':':div:xs) | div `elem` dir_markers
2077 = ((x:':':div:p): splitUp rs)
2079 (p,rs) = findNextPath xs
2080 -- we used to check for existence of the path here, but that
2081 -- required the IO monad to be threaded through the command-line
2082 -- parser which is quite inconvenient. The
2083 splitUp xs = cons p (splitUp rs)
2085 (p,rs) = findNextPath xs
2090 -- will be called either when we've consumed nought or the
2091 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2092 -- finding the next split marker.
2094 case break (`elem` split_markers) xs of
2095 (p, _:ds) -> (p, ds)
2098 split_markers :: [Char]
2099 split_markers = [':', ';']
2101 dir_markers :: [Char]
2102 dir_markers = ['/', '\\']
2105 -- -----------------------------------------------------------------------------
2106 -- tmpDir, where we store temporary files.
2108 setTmpDir :: FilePath -> DynFlags -> DynFlags
2109 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2110 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2111 -- seem necessary now --SDM 7/2/2008
2113 -----------------------------------------------------------------------------
2116 setRtsOpts :: String -> DynP ()
2117 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2119 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2120 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2122 -----------------------------------------------------------------------------
2125 setOptHpcDir :: String -> DynP ()
2126 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2128 -----------------------------------------------------------------------------
2129 -- Via-C compilation stuff
2131 -- There are some options that we need to pass to gcc when compiling
2132 -- Haskell code via C, but are only supported by recent versions of
2133 -- gcc. The configure script decides which of these options we need,
2134 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2135 -- read before each via-C compilation. The advantage of having these
2136 -- in a separate file is that the file can be created at install-time
2137 -- depending on the available gcc version, and even re-generated later
2138 -- if gcc is upgraded.
2140 -- The options below are not dependent on the version of gcc, only the
2143 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2144 [String]) -- for registerised HC compilations
2145 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2146 in (cCcOpts ++ flagsAll, flagsRegHc)
2148 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2149 [String]) -- for registerised HC compilations
2150 machdepCCOpts' _dflags
2151 #if alpha_TARGET_ARCH
2153 #ifdef HAVE_THREADED_RTS_SUPPORT
2157 -- For now, to suppress the gcc warning "call-clobbered
2158 -- register used for global register variable", we simply
2159 -- disable all warnings altogether using the -w flag. Oh well.
2161 #elif hppa_TARGET_ARCH
2162 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2163 -- (very nice, but too bad the HP /usr/include files don't agree.)
2164 = ( ["-D_HPUX_SOURCE"], [] )
2166 #elif m68k_TARGET_ARCH
2167 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2168 -- popping of args to routines to be explicit; if we let things
2169 -- be deferred 'til after an STGJUMP, imminent death is certain!
2171 -- -fomit-frame-pointer : *don't*
2172 -- It's better to have a6 completely tied up being a frame pointer
2173 -- rather than let GCC pick random things to do with it.
2174 -- (If we want to steal a6, then we would try to do things
2175 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2176 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2178 #elif i386_TARGET_ARCH
2179 -- -fno-defer-pop : basically the same game as for m68k
2181 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2182 -- the fp (%ebp) for our register maps.
2183 = let n_regs = stolen_x86_regs _dflags
2186 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2189 "-fomit-frame-pointer",
2190 -- we want -fno-builtin, because when gcc inlines
2191 -- built-in functions like memcpy() it tends to
2192 -- run out of registers, requiring -monly-n-regs
2194 "-DSTOLEN_X86_REGS="++show n_regs ]
2197 #elif ia64_TARGET_ARCH
2198 = ( [], ["-fomit-frame-pointer", "-G0"] )
2200 #elif x86_64_TARGET_ARCH
2203 ["-fomit-frame-pointer",
2204 "-fno-asynchronous-unwind-tables",
2205 -- the unwind tables are unnecessary for HC code,
2206 -- and get in the way of -split-objs. Another option
2207 -- would be to throw them away in the mangler, but this
2210 -- calling builtins like strlen() using the FFI can
2211 -- cause gcc to run out of regs, so use the external
2215 #elif sparc_TARGET_ARCH
2217 -- For now, to suppress the gcc warning "call-clobbered
2218 -- register used for global register variable", we simply
2219 -- disable all warnings altogether using the -w flag. Oh well.
2221 #elif powerpc_apple_darwin_TARGET
2223 -- Disable Apple's precompiling preprocessor. It's a great thing
2224 -- for "normal" programs, but it doesn't support register variable
2226 = ( [], ["-no-cpp-precomp"] )
2231 picCCOpts :: DynFlags -> [String]
2233 #if darwin_TARGET_OS
2234 -- Apple prefers to do things the other way round.
2235 -- PIC is on by default.
2236 -- -mdynamic-no-pic:
2237 -- Turn off PIC code generation.
2239 -- Don't generate "common" symbols - these are unwanted
2240 -- in dynamic libraries.
2243 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2245 = ["-mdynamic-no-pic"]
2246 #elif mingw32_TARGET_OS
2247 -- no -fPIC for Windows
2249 = ["-U __PIC__","-D__PIC__"]
2253 -- we need -fPIC for C files when we are compiling with -dynamic,
2254 -- otherwise things like stub.c files don't get compiled
2255 -- correctly. They need to reference data in the Haskell
2256 -- objects, but can't without -fPIC. See
2257 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2258 | opt_PIC || not opt_Static
2259 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2264 -- -----------------------------------------------------------------------------
2268 can_split = cSplitObjs == "YES"
2270 -- -----------------------------------------------------------------------------
2273 data Printable = String String
2274 | FromDynFlags (DynFlags -> String)
2276 compilerInfo :: [(String, Printable)]
2277 compilerInfo = [("Project name", String cProjectName),
2278 ("Project version", String cProjectVersion),
2279 ("Booter version", String cBooterVersion),
2280 ("Stage", String cStage),
2281 ("Build platform", String cBuildPlatform),
2282 ("Host platform", String cHostPlatform),
2283 ("Target platform", String cTargetPlatform),
2284 ("Have interpreter", String cGhcWithInterpreter),
2285 ("Object splitting", String cSplitObjs),
2286 ("Have native code generator", String cGhcWithNativeCodeGen),
2287 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2288 ("Use archives for ghci", String (show cUseArchivesForGhci)),
2289 ("Support SMP", String cGhcWithSMP),
2290 ("Unregisterised", String cGhcUnregisterised),
2291 ("Tables next to code", String cGhcEnableTablesNextToCode),
2292 ("RTS ways", String cGhcRTSWays),
2293 ("Leading underscore", String cLeadingUnderscore),
2294 ("Debug on", String (show debugIsOn)),
2295 ("LibDir", FromDynFlags topDir),
2296 ("Global Package DB", FromDynFlags systemPackageConfig)