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
66 -- Only in stage 2 can we be sure that the RTS
67 -- exposes the appropriate runtime boolean
72 #include "HsVersions.h"
74 #ifndef OMIT_NATIVE_CODEGEN
79 import PrelNames ( mAIN )
81 import {-# SOURCE #-} Packages (PackageState)
82 import DriverPhases ( Phase(..), phaseInputExt )
85 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
88 import Maybes ( orElse )
93 import Foreign.C ( CInt )
94 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
96 import System.IO.Unsafe ( unsafePerformIO )
98 import Control.Monad ( when )
102 import System.FilePath
103 import System.IO ( stderr, hPutChar )
105 -- -----------------------------------------------------------------------------
108 -- | Enumerates the simple on-or-off dynamic flags
114 | Opt_D_dump_cmmz_pretty
118 | Opt_D_dump_asm_native
119 | Opt_D_dump_asm_liveness
120 | Opt_D_dump_asm_coalesce
121 | Opt_D_dump_asm_regalloc
122 | Opt_D_dump_asm_regalloc_stages
123 | Opt_D_dump_asm_conflicts
124 | Opt_D_dump_asm_stats
125 | Opt_D_dump_asm_expanded
132 | Opt_D_dump_inlinings
133 | Opt_D_dump_rule_firings
134 | Opt_D_dump_occur_anal
138 | Opt_D_dump_simpl_iterations
139 | Opt_D_dump_simpl_phases
148 | Opt_D_dump_worker_wrapper
149 | Opt_D_dump_rn_trace
150 | Opt_D_dump_rn_stats
152 | Opt_D_dump_simpl_stats
153 | Opt_D_dump_tc_trace
154 | Opt_D_dump_if_trace
161 | Opt_D_verbose_core2core
162 | Opt_D_verbose_stg2stg
164 | Opt_D_dump_hi_diffs
165 | Opt_D_dump_minimal_imports
166 | Opt_D_dump_mod_cycles
167 | Opt_D_dump_view_pattern_commoning
168 | Opt_D_faststring_stats
169 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
170 | Opt_D_no_debug_output
176 | Opt_WarnIsError -- -Werror; makes warnings fatal
177 | Opt_WarnDuplicateExports
179 | Opt_WarnImplicitPrelude
180 | Opt_WarnIncompletePatterns
181 | Opt_WarnIncompletePatternsRecUpd
182 | Opt_WarnMissingFields
183 | Opt_WarnMissingImportList
184 | Opt_WarnMissingMethods
185 | Opt_WarnMissingSigs
186 | Opt_WarnNameShadowing
187 | Opt_WarnOverlappingPatterns
188 | Opt_WarnSimplePatterns
189 | Opt_WarnTypeDefaults
190 | Opt_WarnMonomorphism
191 | Opt_WarnUnusedBinds
192 | Opt_WarnUnusedImports
193 | Opt_WarnUnusedMatches
194 | Opt_WarnWarningsDeprecations
195 | Opt_WarnDeprecatedFlags
196 | Opt_WarnDodgyExports
197 | Opt_WarnDodgyImports
200 | Opt_WarnUnrecognisedPragmas
201 | Opt_WarnDodgyForeignImports
202 | Opt_WarnLazyUnliftedBindings
203 | Opt_WarnUnusedDoBind
204 | Opt_WarnWrongDoBind
205 | Opt_WarnAlternativeLayoutRuleTransitional
207 | Opt_PrintExplicitForalls
214 | Opt_StaticArgumentTransformation
218 | Opt_DoLambdaEtaExpansion
222 | Opt_UnboxStrictFields
225 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
227 | Opt_RegsGraph -- do graph coloring register allocation
228 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
231 | Opt_IgnoreInterfacePragmas
232 | Opt_OmitInterfacePragmas
233 | Opt_ExposeAllUnfoldings
236 | Opt_AutoSccsOnAllToplevs
237 | Opt_AutoSccsOnExportedToplevs
238 | Opt_AutoSccsOnIndividualCafs
245 | Opt_ExcessPrecision
246 | Opt_EagerBlackHoling
247 | Opt_ReadUserPackageConf
251 | Opt_HideAllPackages
252 | Opt_PrintBindResult
256 | Opt_BreakOnException
258 | Opt_PrintEvldWithShow
259 | Opt_PrintBindContents
262 | Opt_EmitExternalCore
264 | Opt_BuildingCabalPackage
270 | Opt_ConvertToZipCfgAndBack
271 | Opt_AutoLinkPackages
272 | Opt_ImplicitImportQualified
281 | Opt_KeepRawTokenStream
286 data Language = Haskell98 | Haskell2010
290 | Opt_OverlappingInstances
291 | Opt_UndecidableInstances
292 | Opt_IncoherentInstances
293 | Opt_MonomorphismRestriction
296 | Opt_RelaxedPolyRec -- Deprecated
297 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
298 | Opt_ForeignFunctionInterface
299 | Opt_UnliftedFFITypes
300 | Opt_GHCForeignImportPrim
301 | Opt_PArr -- Syntactic support for parallel arrays
302 | Opt_Arrows -- Arrow-notation syntax
303 | Opt_TemplateHaskell
306 | Opt_Generics -- "Derivable type classes"
307 | Opt_ImplicitPrelude
308 | Opt_ScopedTypeVariables
312 | Opt_OverloadedStrings
313 | Opt_DisambiguateRecordFields
314 | Opt_RecordWildCards
319 | Opt_DoAndIfThenElse
321 | Opt_StandaloneDeriving
322 | Opt_DeriveDataTypeable
324 | Opt_DeriveTraversable
327 | Opt_TypeSynonymInstances
328 | Opt_FlexibleContexts
329 | Opt_FlexibleInstances
330 | Opt_ConstrainedClassMethods
331 | Opt_MultiParamTypeClasses
332 | Opt_FunctionalDependencies
334 | Opt_PolymorphicComponents
335 | Opt_ExistentialQuantification
339 | Opt_ParallelListComp
340 | Opt_TransformListComp
341 | Opt_GeneralizedNewtypeDeriving
344 | Opt_PostfixOperators
347 | Opt_LiberalTypeSynonyms
350 | Opt_ImpredicativeTypes
353 | Opt_NewQualifiedOperators
355 | Opt_AlternativeLayoutRule
356 | Opt_AlternativeLayoutRuleTransitional
357 | Opt_DatatypeContexts
360 -- | Contains not only a collection of 'DynFlag's but also a plethora of
361 -- information relating to the compilation of a single file or GHC session
362 data DynFlags = DynFlags {
365 hscTarget :: HscTarget,
366 hscOutName :: String, -- ^ Name of the output file
367 extCoreName :: String, -- ^ Name of the .hcr output file
368 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
369 optLevel :: Int, -- ^ Optimisation level
370 simplPhases :: Int, -- ^ Number of simplifier phases
371 maxSimplIterations :: Int, -- ^ Max simplifier iterations
372 shouldDumpSimplPhase :: Maybe String,
373 ruleCheck :: Maybe String,
374 strictnessBefore :: [Int], -- ^ Additional demand analysis
376 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
377 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
378 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
380 #ifndef OMIT_NATIVE_CODEGEN
381 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
383 stolen_x86_regs :: Int,
384 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
385 importPaths :: [FilePath],
387 mainFunIs :: Maybe String,
388 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
390 dphBackend :: DPHBackend,
392 thisPackage :: PackageId, -- ^ name of package currently being compiled
395 ways :: [Way], -- ^ Way flags from the command line
396 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
397 rtsBuildTag :: String, -- ^ The RTS \"way\"
399 -- For object splitting
400 splitInfo :: Maybe (String,Int),
403 objectDir :: Maybe String,
404 dylibInstallName :: Maybe String,
405 hiDir :: Maybe String,
406 stubDir :: Maybe String,
412 outputFile :: Maybe String,
413 outputHi :: Maybe String,
414 dynLibLoader :: DynLibLoader,
416 -- | This is set by 'DriverPipeline.runPipeline' based on where
417 -- its output is going.
418 dumpPrefix :: Maybe FilePath,
420 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
421 -- Set by @-ddump-file-prefix@
422 dumpPrefixForce :: Maybe FilePath,
424 includePaths :: [String],
425 libraryPaths :: [String],
426 frameworkPaths :: [String], -- used on darwin only
427 cmdlineFrameworks :: [String], -- ditto
428 tmpDir :: String, -- no trailing '/'
430 ghcUsagePath :: FilePath, -- Filled in by SysTools
431 ghciUsagePath :: FilePath, -- ditto
432 rtsOpts :: Maybe String,
433 rtsOptsEnabled :: RtsOptsEnabled,
435 hpcDir :: String, -- ^ Path to store the .mix files
437 -- options for particular phases
445 opt_windres :: [String],
446 opt_lo :: [String], -- LLVM: llvm optimiser
447 opt_lc :: [String], -- LLVM: llc static compiler
449 -- commands for particular phases
451 pgm_P :: (String,[Option]),
453 pgm_c :: (String,[Option]),
454 pgm_m :: (String,[Option]),
455 pgm_s :: (String,[Option]),
456 pgm_a :: (String,[Option]),
457 pgm_l :: (String,[Option]),
458 pgm_dll :: (String,[Option]),
460 pgm_sysman :: String,
461 pgm_windres :: String,
462 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
463 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
466 depMakefile :: FilePath,
467 depIncludePkgDeps :: Bool,
468 depExcludeMods :: [ModuleName],
469 depSuffixes :: [String],
472 extraPkgConfs :: [FilePath],
473 topDir :: FilePath, -- filled in by SysTools
474 systemPackageConfig :: FilePath, -- ditto
475 -- ^ The @-package-conf@ flags given on the command line, in the order
478 packageFlags :: [PackageFlag],
479 -- ^ The @-package@ and @-hide-package@ flags from the command-line
482 -- NB. do not modify this field, it is calculated by
483 -- Packages.initPackages and Packages.updatePackages.
484 pkgDatabase :: Maybe [PackageConfig],
485 pkgState :: PackageState,
488 -- These have to be IORefs, because the defaultCleanupHandler needs to
489 -- know what to clean when an exception happens
490 filesToClean :: IORef [FilePath],
491 dirsToClean :: IORef (FiniteMap FilePath FilePath),
495 language :: Maybe Language,
496 extensionFlags :: Either [OnOff ExtensionFlag]
499 -- | Message output action: use "ErrUtils" instead of this if you can
500 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
502 haddockOptions :: Maybe String
505 wayNames :: DynFlags -> [WayName]
506 wayNames = map wayName . ways
508 -- | The target code type of the compilation (if any).
510 -- Whenever you change the target, also make sure to set 'ghcLink' to
511 -- something sensible.
513 -- 'HscNothing' can be used to avoid generating any output, however, note
516 -- * This will not run the desugaring step, thus no warnings generated in
517 -- this step will be output. In particular, this includes warnings related
518 -- to pattern matching. You can run the desugarer manually using
519 -- 'GHC.desugarModule'.
521 -- * If a program uses Template Haskell the typechecker may try to run code
522 -- from an imported module. This will fail if no code has been generated
523 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
524 -- whether this might be the case and choose to either switch to a
525 -- different target or avoid typechecking such modules. (The latter may
526 -- preferable for security reasons.)
529 = HscC -- ^ Generate C code.
530 | HscAsm -- ^ Generate assembly using the native code generator.
531 | HscLlvm -- ^ Generate assembly using the llvm code generator.
532 | HscJava -- ^ Generate Java bytecode.
533 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
534 | HscNothing -- ^ Don't generate any code. See notes above.
537 -- | Will this target result in an object file on the disk?
538 isObjectTarget :: HscTarget -> Bool
539 isObjectTarget HscC = True
540 isObjectTarget HscAsm = True
541 isObjectTarget HscLlvm = True
542 isObjectTarget _ = False
544 -- | The 'GhcMode' tells us whether we're doing multi-module
545 -- compilation (controlled via the "GHC" API) or one-shot
546 -- (single-module) compilation. This makes a difference primarily to
547 -- the "Finder": in one-shot mode we look for interface files for
548 -- imported modules, but in multi-module mode we look for source files
549 -- in order to check whether they need to be recompiled.
551 = CompManager -- ^ @\-\-make@, GHCi, etc.
552 | OneShot -- ^ @ghc -c Foo.hs@
553 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
556 instance Outputable GhcMode where
557 ppr CompManager = ptext (sLit "CompManager")
558 ppr OneShot = ptext (sLit "OneShot")
559 ppr MkDepend = ptext (sLit "MkDepend")
561 isOneShot :: GhcMode -> Bool
562 isOneShot OneShot = True
563 isOneShot _other = False
565 -- | What to do in the link step, if there is one.
567 = NoLink -- ^ Don't link at all
568 | LinkBinary -- ^ Link object code into a binary
569 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
570 -- bytecode and object code).
571 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
574 isNoLink :: GhcLink -> Bool
575 isNoLink NoLink = True
578 -- Is it worth evaluating this Bool and caching it in the DynFlags value
579 -- during initDynFlags?
580 doingTickyProfiling :: DynFlags -> Bool
581 doingTickyProfiling _ = opt_Ticky
582 -- XXX -ticky is a static flag, because it implies -debug which is also
583 -- static. If the way flags were made dynamic, we could fix this.
586 = ExposePackage String
587 | ExposePackageId String
589 | IgnorePackage String
592 defaultHscTarget :: HscTarget
593 defaultHscTarget = defaultObjectTarget
595 -- | The 'HscTarget' value corresponding to the default way to create
596 -- object files on the current platform.
597 defaultObjectTarget :: HscTarget
599 | cGhcWithNativeCodeGen == "YES" = HscAsm
607 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
609 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
610 initDynFlags :: DynFlags -> IO DynFlags
611 initDynFlags dflags = do
612 -- someday these will be dynamic flags
613 ways <- readIORef v_Ways
614 refFilesToClean <- newIORef []
615 refDirsToClean <- newIORef emptyFM
618 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
619 rtsBuildTag = mkBuildTag ways,
620 filesToClean = refFilesToClean,
621 dirsToClean = refDirsToClean
624 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
625 -- and must be fully initialized by 'GHC.newSession' first.
626 defaultDynFlags :: DynFlags
629 ghcMode = CompManager,
630 ghcLink = LinkBinary,
631 hscTarget = defaultHscTarget,
637 maxSimplIterations = 4,
638 shouldDumpSimplPhase = Nothing,
640 specConstrThreshold = Just 200,
641 specConstrCount = Just 3,
642 liberateCaseThreshold = Just 200,
643 strictnessBefore = [],
645 #ifndef OMIT_NATIVE_CODEGEN
646 targetPlatform = defaultTargetPlatform,
649 cmdlineHcIncludes = [],
653 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
657 thisPackage = mainPackageId,
660 dylibInstallName = Nothing,
664 objectSuf = phaseInputExt StopLn,
665 hcSuf = phaseInputExt HCc,
668 outputFile = Nothing,
670 dynLibLoader = SystemDependent,
671 dumpPrefix = Nothing,
672 dumpPrefixForce = Nothing,
676 cmdlineFrameworks = [],
677 tmpDir = cDEFAULT_TMPDIR,
679 rtsOptsEnabled = RtsOptsSafeOnly,
685 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
698 pkgDatabase = Nothing,
699 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
700 ways = panic "defaultDynFlags: No ways",
701 buildTag = panic "defaultDynFlags: No buildTag",
702 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
704 -- initSysTools fills all these in
705 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
706 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
707 topDir = panic "defaultDynFlags: No topDir",
708 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
709 pgm_L = panic "defaultDynFlags: No pgm_L",
710 pgm_P = panic "defaultDynFlags: No pgm_P",
711 pgm_F = panic "defaultDynFlags: No pgm_F",
712 pgm_c = panic "defaultDynFlags: No pgm_c",
713 pgm_m = panic "defaultDynFlags: No pgm_m",
714 pgm_s = panic "defaultDynFlags: No pgm_s",
715 pgm_a = panic "defaultDynFlags: No pgm_a",
716 pgm_l = panic "defaultDynFlags: No pgm_l",
717 pgm_dll = panic "defaultDynFlags: No pgm_dll",
718 pgm_T = panic "defaultDynFlags: No pgm_T",
719 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
720 pgm_windres = panic "defaultDynFlags: No pgm_windres",
721 pgm_lo = panic "defaultDynFlags: No pgm_lo",
722 pgm_lc = panic "defaultDynFlags: No pgm_lc",
723 -- end of initSysTools values
725 depMakefile = "Makefile",
726 depIncludePkgDeps = False,
729 -- end of ghc -M values
730 filesToClean = panic "defaultDynFlags: No filesToClean",
731 dirsToClean = panic "defaultDynFlags: No dirsToClean",
732 haddockOptions = Nothing,
733 flags = defaultFlags,
735 extensionFlags = Left [],
737 log_action = \severity srcSpan style msg ->
739 SevOutput -> printOutput (msg style)
740 SevInfo -> printErrs (msg style)
741 SevFatal -> printErrs (msg style)
744 printErrs ((mkLocMessage srcSpan msg) style)
745 -- careful (#2302): printErrs prints in UTF-8, whereas
746 -- converting to string first and using hPutStr would
747 -- just emit the low 8 bits of each unicode char.
751 Note [Verbosity levels]
752 ~~~~~~~~~~~~~~~~~~~~~~~
753 0 | print errors & warnings only
754 1 | minimal verbosity: print "compiling M ... done." for each module.
755 2 | equivalent to -dshow-passes
756 3 | equivalent to existing "ghc -v"
757 4 | "ghc -v -ddump-most"
758 5 | "ghc -v -ddump-all"
764 flattenExtensionFlags :: DynFlags -> DynFlags
765 flattenExtensionFlags dflags
766 = case extensionFlags dflags of
769 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
772 panic "Flattening already-flattened extension flags"
774 ensureFlattenedExtensionFlags :: DynFlags -> DynFlags
775 ensureFlattenedExtensionFlags dflags
776 = case extensionFlags dflags of
779 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
784 -- OnOffs accumulate in reverse order, so we use foldr in order to
785 -- process them in the right order
786 flattenExtensionFlags' :: Maybe Language -> [OnOff ExtensionFlag]
788 flattenExtensionFlags' ml = foldr f defaultExtensionFlags
789 where f (On f) flags = f : delete f flags
790 f (Off f) flags = delete f flags
791 defaultExtensionFlags = languageExtensions ml
793 languageExtensions :: Maybe Language -> [ExtensionFlag]
794 languageExtensions Nothing
795 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
796 -- behaviour the default, to see if anyone notices
798 -- In due course I'd like Opt_MonoLocalBinds to be on by default
799 -- SLPJ September 2010
800 : languageExtensions (Just Haskell2010)
801 languageExtensions (Just Haskell98)
802 = [Opt_ImplicitPrelude,
803 Opt_MonomorphismRestriction,
805 Opt_DatatypeContexts]
806 languageExtensions (Just Haskell2010)
807 = [Opt_ImplicitPrelude,
808 Opt_MonomorphismRestriction,
809 Opt_DatatypeContexts,
811 Opt_ForeignFunctionInterface,
816 -- The DOpt class is a temporary workaround, to avoid having to do
817 -- a mass-renaming dopt->lopt at the moment
819 dopt :: a -> DynFlags -> Bool
820 dopt_set :: DynFlags -> a -> DynFlags
821 dopt_unset :: DynFlags -> a -> DynFlags
823 instance DOpt DynFlag where
826 dopt_unset = dopt_unset'
828 instance DOpt ExtensionFlag where
831 dopt_unset = lopt_unset
833 -- | Test whether a 'DynFlag' is set
834 dopt' :: DynFlag -> DynFlags -> Bool
835 dopt' f dflags = f `elem` (flags dflags)
838 dopt_set' :: DynFlags -> DynFlag -> DynFlags
839 dopt_set' dfs f = dfs{ flags = f : flags dfs }
841 -- | Unset a 'DynFlag'
842 dopt_unset' :: DynFlags -> DynFlag -> DynFlags
843 dopt_unset' dfs f = dfs{ flags = filter (/= f) (flags dfs) }
845 -- | Test whether a 'ExtensionFlag' is set
846 lopt :: ExtensionFlag -> DynFlags -> Bool
847 lopt f dflags = case extensionFlags dflags of
848 Left _ -> panic ("Testing for extension flag " ++ show f ++ " before flattening")
849 Right flags -> f `elem` flags
851 -- | Set a 'ExtensionFlag'
852 lopt_set :: DynFlags -> ExtensionFlag -> DynFlags
853 lopt_set dfs f = case extensionFlags dfs of
854 Left onoffs -> dfs { extensionFlags = Left (On f : onoffs) }
855 Right _ -> panic ("Setting extension flag " ++ show f ++ " after flattening")
857 -- | Set a 'ExtensionFlag'
858 lopt_set_flattened :: DynFlags -> ExtensionFlag -> DynFlags
859 lopt_set_flattened dfs f = case extensionFlags dfs of
861 panic ("Setting extension flag " ++ show f ++ " before flattening, but expected flattened")
863 dfs { extensionFlags = Right (f : delete f flags) }
865 -- | Unset a 'ExtensionFlag'
866 lopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
867 lopt_unset dfs f = case extensionFlags dfs of
868 Left onoffs -> dfs { extensionFlags = Left (Off f : onoffs) }
869 Right _ -> panic ("Unsetting extension flag " ++ show f ++ " after flattening")
871 -- | Unset a 'ExtensionFlag'
872 lopt_unset_flattened :: DynFlags -> ExtensionFlag -> DynFlags
873 lopt_unset_flattened dfs f = case extensionFlags dfs of
875 panic ("Unsetting extension flag " ++ show f ++ " before flattening, but expected flattened")
877 dfs { extensionFlags = Right (delete f flags) }
879 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
880 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
881 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
882 -> [a] -- ^ Correctly ordered extracted options
883 getOpts dflags opts = reverse (opts dflags)
884 -- We add to the options from the front, so we need to reverse the list
886 -- | Gets the verbosity flag for the current verbosity level. This is fed to
887 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
888 getVerbFlag :: DynFlags -> String
890 | verbosity dflags >= 3 = "-v"
893 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
894 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
895 setPgmP, addOptl, addOptP,
896 addCmdlineFramework, addHaddockOpts
897 :: String -> DynFlags -> DynFlags
898 setOutputFile, setOutputHi, setDumpPrefixForce
899 :: Maybe String -> DynFlags -> DynFlags
901 setObjectDir f d = d{ objectDir = Just f}
902 setHiDir f d = d{ hiDir = Just f}
903 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
904 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
905 -- \#included from the .hc file when compiling with -fvia-C.
906 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
907 setDylibInstallName f d = d{ dylibInstallName = Just f}
909 setObjectSuf f d = d{ objectSuf = f}
910 setHiSuf f d = d{ hiSuf = f}
911 setHcSuf f d = d{ hcSuf = f}
913 setOutputFile f d = d{ outputFile = f}
914 setOutputHi f d = d{ outputHi = f}
916 parseDynLibLoaderMode f d =
918 ("deploy", "") -> d{ dynLibLoader = Deployable }
919 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
920 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
922 setDumpPrefixForce f d = d { dumpPrefixForce = f}
924 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
925 -- Config.hs should really use Option.
926 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
927 addOptl f d = d{ opt_l = f : opt_l d}
928 addOptP f d = d{ opt_P = f : opt_P d}
931 setDepMakefile :: FilePath -> DynFlags -> DynFlags
932 setDepMakefile f d = d { depMakefile = deOptDep f }
934 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
935 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
937 addDepExcludeMod :: String -> DynFlags -> DynFlags
939 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
941 addDepSuffix :: FilePath -> DynFlags -> DynFlags
942 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
945 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
946 -- we need to strip the "-optdep" off of the arg
947 deOptDep :: String -> String
948 deOptDep x = case stripPrefix "-optdep" x of
952 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
954 addHaddockOpts f d = d{ haddockOptions = Just f}
956 -- -----------------------------------------------------------------------------
957 -- Command-line options
959 -- | When invoking external tools as part of the compilation pipeline, we
960 -- pass these a sequence of options on the command-line. Rather than
961 -- just using a list of Strings, we use a type that allows us to distinguish
962 -- between filepaths and 'other stuff'. The reason for this is that
963 -- this type gives us a handle on transforming filenames, and filenames only,
964 -- to whatever format they're expected to be on a particular platform.
966 = FileOption -- an entry that _contains_ filename(s) / filepaths.
967 String -- a non-filepath prefix that shouldn't be
968 -- transformed (e.g., "/out=")
969 String -- the filepath/filename portion
972 showOpt :: Option -> String
973 showOpt (FileOption pre f) = pre ++ f
974 showOpt (Option s) = s
976 -----------------------------------------------------------------------------
977 -- Setting the optimisation level
979 updOptLevel :: Int -> DynFlags -> DynFlags
980 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
982 = dfs2{ optLevel = final_n }
984 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
985 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
986 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
988 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
989 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
991 -- -----------------------------------------------------------------------------
992 -- StgToDo: abstraction of stg-to-stg passes to run.
995 = StgDoMassageForProfiling -- should be (next to) last
996 -- There's also setStgVarInfo, but its absolute "lastness"
997 -- is so critical that it is hardwired in (no flag).
1000 getStgToDo :: DynFlags -> [StgToDo]
1004 stg_stats = dopt Opt_StgStats dflags
1006 todo1 = if stg_stats then [D_stg_stats] else []
1008 todo2 | WayProf `elem` wayNames dflags
1009 = StgDoMassageForProfiling : todo1
1013 {- **********************************************************************
1017 %********************************************************************* -}
1019 -- -----------------------------------------------------------------------------
1020 -- Parsing the dynamic flags.
1022 -- | Parse dynamic flags from a list of command line arguments. Returns the
1023 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1024 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1025 -- flags or missing arguments).
1026 parseDynamicFlags :: 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 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1033 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1034 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1035 parseDynamicNoPackageFlags :: Monad m =>
1036 DynFlags -> [Located String]
1037 -> m (DynFlags, [Located String], [Located String])
1038 -- ^ Updated 'DynFlags', left-over arguments, and
1039 -- list of warnings.
1040 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1042 parseDynamicFlags_ :: Monad m =>
1043 DynFlags -> [Located String] -> Bool
1044 -> m (DynFlags, [Located String], [Located String])
1045 parseDynamicFlags_ dflags0 args pkg_flags = do
1046 -- XXX Legacy support code
1047 -- We used to accept things like
1048 -- optdep-f -optdepdepend
1049 -- optdep-f -optdep depend
1050 -- optdep -f -optdepdepend
1051 -- optdep -f -optdep depend
1052 -- but the spaces trip up proper argument handling. So get rid of them.
1053 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1054 f (x : xs) = x : f xs
1058 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1059 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1060 | otherwise = dynamic_flags
1062 let ((leftover, errs, warns), dflags1)
1063 = runCmdLine (processArgs flag_spec args') dflags0
1064 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1066 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1067 -- isn't up to the job. We know that if hscTarget == HscC, then the
1068 -- user has explicitly used -fvia-C, because -fasm is the default,
1069 -- unless there is no NCG on this platform. The latter case is
1070 -- checked when the -fPIC flag is parsed.
1072 let (pic_warns, dflags2)
1073 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1074 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1075 dflags1{ hscTarget = HscAsm })
1076 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1077 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1078 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1079 ++ "dynamic on this platform;\n ignoring -fllvm"],
1080 dflags1{ hscTarget = HscAsm })
1082 | otherwise = ([], dflags1)
1084 return (dflags2, leftover, pic_warns ++ warns)
1087 {- **********************************************************************
1089 DynFlags specifications
1091 %********************************************************************* -}
1093 allFlags :: [String]
1094 allFlags = map ('-':) $
1095 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1096 map ("fno-"++) flags ++
1097 map ("f"++) flags ++
1098 map ("f"++) flags' ++
1099 map ("X"++) supportedExtensions
1100 where ok (PrefixPred _ _) = False
1102 flags = [ name | (name, _, _) <- fFlags ]
1103 flags' = [ name | (name, _, _) <- fLangFlags ]
1105 --------------- The main flags themselves ------------------
1106 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1108 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1109 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1110 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1112 (HasArg (\s -> do { addCmdlineHCInclude s
1113 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1114 , Flag "v" (OptIntSuffix setVerbosity)
1116 ------- Specific phases --------------------------------------------
1117 -- need to appear before -pgmL to be parsed as LLVM flags.
1118 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1119 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1120 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1121 , Flag "pgmP" (hasArg setPgmP)
1122 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1123 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1124 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1125 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1126 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1127 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1128 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1129 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1131 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1132 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1133 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1134 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1135 , Flag "optP" (hasArg addOptP)
1136 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1137 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1138 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1139 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1140 , Flag "optl" (hasArg addOptl)
1141 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1144 (NoArg (if can_split
1145 then setDynFlag Opt_SplitObjs
1146 else addWarn "ignoring -fsplit-objs"))
1148 -------- ghc -M -----------------------------------------------------
1149 , Flag "dep-suffix" (hasArg addDepSuffix)
1150 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1151 , Flag "dep-makefile" (hasArg setDepMakefile)
1152 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1153 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1154 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1155 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1156 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1157 , Flag "exclude-module" (hasArg addDepExcludeMod)
1158 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1159 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1161 -------- Linking ----------------------------------------------------
1162 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1163 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1164 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1165 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1167 ------- Libraries ---------------------------------------------------
1168 , Flag "L" (Prefix addLibraryPath)
1169 , Flag "l" (AnySuffix (upd . addOptl))
1171 ------- Frameworks --------------------------------------------------
1172 -- -framework-path should really be -F ...
1173 , Flag "framework-path" (HasArg addFrameworkPath)
1174 , Flag "framework" (hasArg addCmdlineFramework)
1176 ------- Output Redirection ------------------------------------------
1177 , Flag "odir" (hasArg setObjectDir)
1178 , Flag "o" (SepArg (upd . setOutputFile . Just))
1179 , Flag "ohi" (hasArg (setOutputHi . Just ))
1180 , Flag "osuf" (hasArg setObjectSuf)
1181 , Flag "hcsuf" (hasArg setHcSuf)
1182 , Flag "hisuf" (hasArg setHiSuf)
1183 , Flag "hidir" (hasArg setHiDir)
1184 , Flag "tmpdir" (hasArg setTmpDir)
1185 , Flag "stubdir" (hasArg setStubDir)
1186 , Flag "outputdir" (hasArg setOutputDir)
1187 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1189 ------- Keeping temporary files -------------------------------------
1190 -- These can be singular (think ghc -c) or plural (think ghc --make)
1191 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1192 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1193 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1194 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1195 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1196 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1197 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1198 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1199 -- This only makes sense as plural
1200 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1202 ------- Miscellaneous ----------------------------------------------
1203 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1204 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1205 , Flag "with-rtsopts" (HasArg setRtsOpts)
1206 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1207 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1208 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1209 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1210 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1211 , Flag "main-is" (SepArg setMainIs)
1212 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1213 , Flag "haddock-opts" (hasArg addHaddockOpts)
1214 , Flag "hpcdir" (SepArg setOptHpcDir)
1216 ------- recompilation checker --------------------------------------
1217 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1218 ; deprecate "Use -fno-force-recomp instead" }))
1219 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1220 ; deprecate "Use -fforce-recomp instead" }))
1222 ------ HsCpp opts ---------------------------------------------------
1223 , Flag "D" (AnySuffix (upd . addOptP))
1224 , Flag "U" (AnySuffix (upd . addOptP))
1226 ------- Include/Import Paths ----------------------------------------
1227 , Flag "I" (Prefix addIncludePath)
1228 , Flag "i" (OptPrefix addImportPath)
1230 ------ Debugging ----------------------------------------------------
1231 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1233 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1234 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1235 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1236 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1237 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1238 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1239 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1240 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1241 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1242 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1243 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1244 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1245 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1246 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1247 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1248 ; setDumpFlag' Opt_D_dump_llvm}))
1249 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1250 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1251 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1252 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1253 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1254 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1255 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1256 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1257 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1258 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1259 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1260 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1261 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1262 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1263 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1264 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1265 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1266 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1267 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1268 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1269 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1270 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1271 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1272 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1273 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1274 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1275 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1276 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1277 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1278 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1279 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1280 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1281 ; setVerboseCore2Core }))
1282 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1283 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1284 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1285 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1286 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1287 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1288 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1289 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1290 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1291 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1292 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1293 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1294 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1295 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1296 , Flag "dshow-passes" (NoArg (do forceRecompile
1297 setVerbosity (Just 2)))
1298 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1300 ------ Machine dependant (-m<blah>) stuff ---------------------------
1302 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1303 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1304 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1305 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1307 ------ Warning opts -------------------------------------------------
1308 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1309 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1310 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1311 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1312 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1313 ; deprecate "Use -w instead" }))
1314 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1316 ------ Optimisation flags ------------------------------------------
1317 , Flag "O" (noArg (setOptLevel 1))
1318 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1319 , Flag "Odph" (noArg setDPHOpt)
1320 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1321 -- If the number is missing, use 1
1323 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1324 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1325 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1326 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1327 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1328 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1329 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1330 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1331 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1332 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1333 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1335 ------ Profiling ----------------------------------------------------
1337 -- XXX Should the -f* flags be deprecated?
1338 -- They don't seem to be documented
1339 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1340 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1341 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1342 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1343 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1344 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1345 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1346 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1347 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1349 ------ DPH flags ----------------------------------------------------
1351 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1352 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1353 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1355 ------ Compiler flags -----------------------------------------------
1357 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1358 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1359 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1360 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1361 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1362 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1364 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1365 setTarget HscNothing))
1366 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1367 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1368 , Flag "fglasgow-exts" (NoArg enableGlasgowExts)
1369 , Flag "fno-glasgow-exts" (NoArg disableGlasgowExts)
1371 ++ map (mkFlag True "f" setDynFlag ) fFlags
1372 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1373 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1374 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1375 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1376 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1377 ++ map (mkFlag True "X" setLanguage) languageFlags
1379 package_flags :: [Flag (CmdLineP DynFlags)]
1381 ------- Packages ----------------------------------------------------
1382 Flag "package-conf" (HasArg extraPkgConf_)
1383 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1384 , Flag "package-name" (hasArg setPackageName)
1385 , Flag "package-id" (HasArg exposePackageId)
1386 , Flag "package" (HasArg exposePackage)
1387 , Flag "hide-package" (HasArg hidePackage)
1388 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1389 , Flag "ignore-package" (HasArg ignorePackage)
1390 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1391 ; deprecate "Use -package instead" }))
1395 = ( String -- Flag in string form
1396 , flag -- Flag in internal form
1397 , Bool -> DynP ()) -- Extra action to run when the flag is found
1398 -- Typically, emit a warning or error
1399 -- True <=> we are turning the flag on
1400 -- False <=> we are turning the flag off
1403 mkFlag :: Bool -- ^ True <=> it should be turned on
1404 -> String -- ^ The flag prefix
1405 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1406 -> FlagSpec flag -- ^ Specification of this particular flag
1407 -> Flag (CmdLineP DynFlags)
1408 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1409 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1411 deprecatedForExtension :: String -> Bool -> DynP ()
1412 deprecatedForExtension lang turn_on
1413 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1415 flag | turn_on = lang
1416 | otherwise = "No"++lang
1418 useInstead :: String -> Bool -> DynP ()
1419 useInstead flag turn_on
1420 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1422 no = if turn_on then "" else "no-"
1424 nop :: Bool -> DynP ()
1427 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1428 fFlags :: [FlagSpec DynFlag]
1430 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1431 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1432 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1433 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1434 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1435 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1436 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1437 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1438 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1439 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1440 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1441 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1442 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1443 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1444 ( "warn-simple-patterns", Opt_WarnSimplePatterns, nop ),
1445 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1446 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1447 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1448 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1449 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1450 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1451 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1452 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1453 ( "warn-orphans", Opt_WarnOrphans, nop ),
1454 ( "warn-tabs", Opt_WarnTabs, nop ),
1455 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1456 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1457 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1458 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1459 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1460 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1461 ( "strictness", Opt_Strictness, nop ),
1462 ( "specialise", Opt_Specialise, nop ),
1463 ( "float-in", Opt_FloatIn, nop ),
1464 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1465 ( "full-laziness", Opt_FullLaziness, nop ),
1466 ( "liberate-case", Opt_LiberateCase, nop ),
1467 ( "spec-constr", Opt_SpecConstr, nop ),
1468 ( "cse", Opt_CSE, nop ),
1469 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1470 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1471 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1472 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1473 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1474 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1475 ( "case-merge", Opt_CaseMerge, nop ),
1476 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1477 ( "method-sharing", Opt_MethodSharing, nop ),
1478 ( "dicts-cheap", Opt_DictsCheap, nop ),
1479 ( "excess-precision", Opt_ExcessPrecision, nop ),
1480 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1481 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1482 ( "print-bind-result", Opt_PrintBindResult, nop ),
1483 ( "force-recomp", Opt_ForceRecomp, nop ),
1484 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1485 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1486 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1487 ( "break-on-exception", Opt_BreakOnException, nop ),
1488 ( "break-on-error", Opt_BreakOnError, nop ),
1489 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1490 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1491 ( "run-cps", Opt_RunCPS, nop ),
1492 ( "run-cpsz", Opt_RunCPSZ, nop ),
1493 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1494 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1495 ( "vectorise", Opt_Vectorise, nop ),
1496 ( "regs-graph", Opt_RegsGraph, nop ),
1497 ( "regs-iterative", Opt_RegsIterative, nop ),
1498 ( "gen-manifest", Opt_GenManifest, nop ),
1499 ( "embed-manifest", Opt_EmbedManifest, nop ),
1500 ( "ext-core", Opt_EmitExternalCore, nop ),
1501 ( "shared-implib", Opt_SharedImplib, nop ),
1502 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1503 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1506 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1507 fLangFlags :: [FlagSpec ExtensionFlag]
1509 ( "th", Opt_TemplateHaskell,
1510 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1511 ( "fi", Opt_ForeignFunctionInterface,
1512 deprecatedForExtension "ForeignFunctionInterface" ),
1513 ( "ffi", Opt_ForeignFunctionInterface,
1514 deprecatedForExtension "ForeignFunctionInterface" ),
1515 ( "arrows", Opt_Arrows,
1516 deprecatedForExtension "Arrows" ),
1517 ( "generics", Opt_Generics,
1518 deprecatedForExtension "Generics" ),
1519 ( "implicit-prelude", Opt_ImplicitPrelude,
1520 deprecatedForExtension "ImplicitPrelude" ),
1521 ( "bang-patterns", Opt_BangPatterns,
1522 deprecatedForExtension "BangPatterns" ),
1523 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1524 deprecatedForExtension "MonomorphismRestriction" ),
1525 ( "mono-pat-binds", Opt_MonoPatBinds,
1526 deprecatedForExtension "MonoPatBinds" ),
1527 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1528 deprecatedForExtension "ExtendedDefaultRules" ),
1529 ( "implicit-params", Opt_ImplicitParams,
1530 deprecatedForExtension "ImplicitParams" ),
1531 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1532 deprecatedForExtension "ScopedTypeVariables" ),
1534 deprecatedForExtension "PArr" ),
1535 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1536 deprecatedForExtension "OverlappingInstances" ),
1537 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1538 deprecatedForExtension "UndecidableInstances" ),
1539 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1540 deprecatedForExtension "IncoherentInstances" )
1543 supportedLanguages :: [String]
1544 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1546 supportedExtensions :: [String]
1547 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1549 supportedLanguagesAndExtensions :: [String]
1550 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1552 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1553 languageFlags :: [FlagSpec Language]
1555 ( "Haskell98", Haskell98, nop ),
1556 ( "Haskell2010", Haskell2010, nop )
1559 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1560 xFlags :: [FlagSpec ExtensionFlag]
1562 ( "CPP", Opt_Cpp, nop ),
1563 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1564 ( "TupleSections", Opt_TupleSections, nop ),
1565 ( "PatternGuards", Opt_PatternGuards, nop ),
1566 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1567 ( "MagicHash", Opt_MagicHash, nop ),
1568 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1569 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1570 ( "KindSignatures", Opt_KindSignatures, nop ),
1571 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1572 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1573 ( "TransformListComp", Opt_TransformListComp, nop ),
1574 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1575 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1576 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1577 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1578 ( "Rank2Types", Opt_Rank2Types, nop ),
1579 ( "RankNTypes", Opt_RankNTypes, nop ),
1580 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1581 \_ -> deprecate "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1582 ( "TypeOperators", Opt_TypeOperators, nop ),
1583 ( "RecursiveDo", Opt_RecursiveDo,
1584 deprecatedForExtension "DoRec"),
1585 ( "DoRec", Opt_DoRec, nop ),
1586 ( "Arrows", Opt_Arrows, nop ),
1587 ( "PArr", Opt_PArr, nop ),
1588 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1589 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1590 ( "Generics", Opt_Generics, nop ),
1591 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1592 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1593 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1594 ( "RecordPuns", Opt_RecordPuns,
1595 deprecatedForExtension "NamedFieldPuns" ),
1596 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1597 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1598 ( "GADTs", Opt_GADTs, nop ),
1599 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1600 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1601 ( "BangPatterns", Opt_BangPatterns, nop ),
1602 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1603 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1604 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1605 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1606 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1607 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1608 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1609 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1610 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1611 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1612 \ turn_on -> if not turn_on
1613 then deprecate "You can't turn off RelaxedPolyRec any more"
1615 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1616 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1617 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1619 ( "PatternSignatures", Opt_ScopedTypeVariables,
1620 deprecatedForExtension "ScopedTypeVariables" ),
1622 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1623 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1624 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1625 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1626 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1627 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1628 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1629 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1630 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1631 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1632 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1633 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1634 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1635 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1636 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1637 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1638 ( "PackageImports", Opt_PackageImports, nop ),
1639 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1640 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1643 defaultFlags :: [DynFlag]
1645 = [ Opt_AutoLinkPackages,
1646 Opt_ReadUserPackageConf,
1656 Opt_PrintBindContents
1659 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1660 -- The default -O0 options
1664 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1666 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1667 , (Opt_Rank2Types, Opt_ExplicitForAll)
1668 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1669 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1670 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1671 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1673 , (Opt_GADTs, Opt_MonoLocalBinds)
1674 , (Opt_TypeFamilies, Opt_MonoLocalBinds)
1675 , (Opt_FunctionalDependencies, Opt_MonoLocalBinds)
1677 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1678 -- all over the place
1680 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1682 -- Record wild-cards implies field disambiguation
1683 -- Otherwise if you write (C {..}) you may well get
1684 -- stuff like " 'a' not in scope ", which is a bit silly
1685 -- if the compiler has just filled in field 'a' of constructor 'C'
1686 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1689 optLevelFlags :: [([Int], DynFlag)]
1691 = [ ([0], Opt_IgnoreInterfacePragmas)
1692 , ([0], Opt_OmitInterfacePragmas)
1694 , ([1,2], Opt_IgnoreAsserts)
1695 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1697 , ([1,2], Opt_DoEtaReduction)
1698 , ([1,2], Opt_CaseMerge)
1699 , ([1,2], Opt_Strictness)
1701 , ([1,2], Opt_FullLaziness)
1702 , ([1,2], Opt_Specialise)
1703 , ([1,2], Opt_FloatIn)
1705 , ([2], Opt_LiberateCase)
1706 , ([2], Opt_SpecConstr)
1707 , ([2], Opt_RegsGraph)
1709 -- , ([2], Opt_StaticArgumentTransformation)
1710 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1711 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1712 -- several improvements to the heuristics, and I'm concerned that without
1713 -- those changes SAT will interfere with some attempts to write "high
1714 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1715 -- this year. In particular, the version in HEAD lacks the tail call
1716 -- criterion, so many things that look like reasonable loops will be
1717 -- turned into functions with extra (unneccesary) thunk creation.
1719 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1720 -- This one is important for a tiresome reason:
1721 -- we want to make sure that the bindings for data
1722 -- constructors are eta-expanded. This is probably
1723 -- a good thing anyway, but it seems fragile.
1726 -- -----------------------------------------------------------------------------
1727 -- Standard sets of warning options
1729 standardWarnings :: [DynFlag]
1731 = [ Opt_WarnWarningsDeprecations,
1732 Opt_WarnDeprecatedFlags,
1733 Opt_WarnUnrecognisedPragmas,
1734 Opt_WarnOverlappingPatterns,
1735 Opt_WarnMissingFields,
1736 Opt_WarnMissingMethods,
1737 Opt_WarnDuplicateExports,
1738 Opt_WarnLazyUnliftedBindings,
1739 Opt_WarnDodgyForeignImports,
1740 Opt_WarnWrongDoBind,
1741 Opt_WarnAlternativeLayoutRuleTransitional
1744 minusWOpts :: [DynFlag]
1746 = standardWarnings ++
1747 [ Opt_WarnUnusedBinds,
1748 Opt_WarnUnusedMatches,
1749 Opt_WarnUnusedImports,
1750 Opt_WarnIncompletePatterns,
1751 Opt_WarnDodgyExports,
1752 Opt_WarnDodgyImports
1755 minusWallOpts :: [DynFlag]
1758 [ Opt_WarnTypeDefaults,
1759 Opt_WarnNameShadowing,
1760 Opt_WarnMissingSigs,
1763 Opt_WarnUnusedDoBind
1766 -- minuswRemovesOpts should be every warning option
1767 minuswRemovesOpts :: [DynFlag]
1770 [Opt_WarnImplicitPrelude,
1771 Opt_WarnIncompletePatternsRecUpd,
1772 Opt_WarnSimplePatterns,
1773 Opt_WarnMonomorphism,
1774 Opt_WarnUnrecognisedPragmas,
1778 enableGlasgowExts :: DynP ()
1779 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1780 mapM_ setExtensionFlag glasgowExtsFlags
1782 disableGlasgowExts :: DynP ()
1783 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1784 mapM_ unSetExtensionFlag glasgowExtsFlags
1786 glasgowExtsFlags :: [ExtensionFlag]
1787 glasgowExtsFlags = [
1788 Opt_ForeignFunctionInterface
1789 , Opt_UnliftedFFITypes
1791 , Opt_ImplicitParams
1792 , Opt_ScopedTypeVariables
1794 , Opt_TypeSynonymInstances
1795 , Opt_StandaloneDeriving
1796 , Opt_DeriveDataTypeable
1798 , Opt_DeriveFoldable
1799 , Opt_DeriveTraversable
1800 , Opt_FlexibleContexts
1801 , Opt_FlexibleInstances
1802 , Opt_ConstrainedClassMethods
1803 , Opt_MultiParamTypeClasses
1804 , Opt_FunctionalDependencies
1806 , Opt_PolymorphicComponents
1807 , Opt_ExistentialQuantification
1809 , Opt_PostfixOperators
1811 , Opt_LiberalTypeSynonyms
1815 , Opt_ParallelListComp
1816 , Opt_EmptyDataDecls
1817 , Opt_KindSignatures
1818 , Opt_GeneralizedNewtypeDeriving
1819 , Opt_TypeFamilies ]
1822 -- Consult the RTS to find whether GHC itself has been built profiled
1823 -- If so, you can't use Template Haskell
1824 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1826 rtsIsProfiled :: Bool
1827 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1829 checkTemplateHaskellOk :: Bool -> DynP ()
1830 checkTemplateHaskellOk turn_on
1831 | turn_on && rtsIsProfiled
1832 = addErr "You can't use Template Haskell with a profiled compiler"
1836 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1837 -- so we simply say "ok". It doesn't matter because TH isn't
1838 -- available in stage 1 anyway.
1839 checkTemplateHaskellOk turn_on = return ()
1842 {- **********************************************************************
1844 DynFlags constructors
1846 %********************************************************************* -}
1848 type DynP = EwM (CmdLineP DynFlags)
1850 upd :: (DynFlags -> DynFlags) -> DynP ()
1851 upd f = liftEwM (do { dfs <- getCmdLineState
1852 ; putCmdLineState $! (f dfs) })
1854 --------------- Constructor functions for OptKind -----------------
1855 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1856 noArg fn = NoArg (upd fn)
1858 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1859 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1861 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1862 hasArg fn = HasArg (upd . fn)
1864 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1865 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1866 ; deprecate deprec })
1868 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1869 intSuffix fn = IntSuffix (\n -> upd (fn n))
1871 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1872 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1874 --------------------------
1875 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1876 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1877 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1879 --------------------------
1880 setLanguage :: Language -> DynP ()
1881 setLanguage l = upd (\dfs -> dfs { language = Just l })
1883 --------------------------
1884 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1885 setExtensionFlag f = do { upd (\dfs -> lopt_set dfs f)
1886 ; mapM_ setExtensionFlag deps }
1888 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1889 -- When you set f, set the ones it implies
1890 -- NB: use setExtensionFlag recursively, in case the implied flags
1891 -- implies further flags
1892 -- When you un-set f, however, we don't un-set the things it implies
1893 -- (except for -fno-glasgow-exts, which is treated specially)
1895 unSetExtensionFlag f = upd (\dfs -> lopt_unset dfs f)
1897 --------------------------
1898 setDumpFlag' :: DynFlag -> DynP ()
1899 setDumpFlag' dump_flag
1900 = do { setDynFlag dump_flag
1901 ; when want_recomp forceRecompile }
1903 -- Certain dumpy-things are really interested in what's going
1904 -- on during recompilation checking, so in those cases we
1905 -- don't want to turn it off.
1906 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1907 Opt_D_dump_hi_diffs]
1909 forceRecompile :: DynP ()
1910 -- Whenver we -ddump, force recompilation (by switching off the
1911 -- recompilation checker), else you don't see the dump! However,
1912 -- don't switch it off in --make mode, else *everything* gets
1913 -- recompiled which probably isn't what you want
1914 forceRecompile = do { dfs <- liftEwM getCmdLineState
1915 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1917 force_recomp dfs = isOneShot (ghcMode dfs)
1919 setVerboseCore2Core :: DynP ()
1920 setVerboseCore2Core = do forceRecompile
1921 setDynFlag Opt_D_verbose_core2core
1922 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1925 setDumpSimplPhases :: String -> DynP ()
1926 setDumpSimplPhases s = do forceRecompile
1927 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1929 spec = case s of { ('=' : s') -> s'; _ -> s }
1931 setVerbosity :: Maybe Int -> DynP ()
1932 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1934 addCmdlineHCInclude :: String -> DynP ()
1935 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1937 extraPkgConf_ :: FilePath -> DynP ()
1938 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1940 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1942 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1944 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1946 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1948 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1950 setPackageName :: String -> DynFlags -> DynFlags
1951 setPackageName p s = s{ thisPackage = stringToPackageId p }
1953 -- If we're linking a binary, then only targets that produce object
1954 -- code are allowed (requests for other target types are ignored).
1955 setTarget :: HscTarget -> DynP ()
1956 setTarget l = upd set
1959 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1962 -- Changes the target only if we're compiling object code. This is
1963 -- used by -fasm and -fvia-C, which switch from one to the other, but
1964 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1965 -- can be safely used in an OPTIONS_GHC pragma.
1966 setObjTarget :: HscTarget -> DynP ()
1967 setObjTarget l = upd set
1970 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1973 setOptLevel :: Int -> DynFlags -> DynFlags
1974 setOptLevel n dflags
1975 | hscTarget dflags == HscInterpreted && n > 0
1977 -- not in IO any more, oh well:
1978 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1980 = updOptLevel n dflags
1983 -- -Odph is equivalent to
1985 -- -O2 optimise as much as possible
1986 -- -fno-method-sharing sharing specialisation defeats fusion
1988 -- -fdicts-cheap always inline dictionaries
1989 -- -fmax-simplifier-iterations20 this is necessary sometimes
1990 -- -fsimplifier-phases=3 we use an additional simplifier phase
1992 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1993 -- -fno-spec-constr-count SpecConstr as much as possible
1994 -- -finline-enough-args hack to prevent excessive inlining
1996 setDPHOpt :: DynFlags -> DynFlags
1997 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1999 , specConstrThreshold = Nothing
2000 , specConstrCount = Nothing
2002 `dopt_set` Opt_DictsCheap
2003 `dopt_unset` Opt_MethodSharing
2005 data DPHBackend = DPHPar
2008 deriving(Eq, Ord, Enum, Show)
2010 setDPHBackend :: DPHBackend -> DynP ()
2011 setDPHBackend backend
2013 upd $ \dflags -> dflags { dphBackend = backend }
2014 mapM_ exposePackage (dph_packages backend)
2016 dph_packages DPHThis = []
2017 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2018 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2020 dphPackage :: DynFlags -> PackageId
2021 dphPackage dflags = case dphBackend dflags of
2022 DPHPar -> dphParPackageId
2023 DPHSeq -> dphSeqPackageId
2024 DPHThis -> thisPackage dflags
2026 setMainIs :: String -> DynP ()
2028 | not (null main_fn) && isLower (head main_fn)
2029 -- The arg looked like "Foo.Bar.baz"
2030 = upd $ \d -> d{ mainFunIs = Just main_fn,
2031 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2033 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2034 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2036 | otherwise -- The arg looked like "baz"
2037 = upd $ \d -> d{ mainFunIs = Just arg }
2039 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2041 -----------------------------------------------------------------------------
2042 -- Paths & Libraries
2044 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2046 -- -i on its own deletes the import paths
2047 addImportPath "" = upd (\s -> s{importPaths = []})
2048 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2052 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2055 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2057 addFrameworkPath p =
2058 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2060 #ifndef mingw32_TARGET_OS
2061 split_marker :: Char
2062 split_marker = ':' -- not configurable (ToDo)
2065 splitPathList :: String -> [String]
2066 splitPathList s = filter notNull (splitUp s)
2067 -- empty paths are ignored: there might be a trailing
2068 -- ':' in the initial list, for example. Empty paths can
2069 -- cause confusion when they are translated into -I options
2070 -- for passing to gcc.
2072 #ifndef mingw32_TARGET_OS
2073 splitUp xs = split split_marker xs
2075 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2077 -- That is, if "foo:bar:baz" is used, this interpreted as
2078 -- consisting of three entries, 'foo', 'bar', 'baz'.
2079 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2080 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2082 -- Notice that no attempt is made to fully replace the 'standard'
2083 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2084 -- that this will cause too much breakage for users & ':' will
2085 -- work fine even with DOS paths, if you're not insisting on being silly.
2088 splitUp (x:':':div:xs) | div `elem` dir_markers
2089 = ((x:':':div:p): splitUp rs)
2091 (p,rs) = findNextPath xs
2092 -- we used to check for existence of the path here, but that
2093 -- required the IO monad to be threaded through the command-line
2094 -- parser which is quite inconvenient. The
2095 splitUp xs = cons p (splitUp rs)
2097 (p,rs) = findNextPath xs
2102 -- will be called either when we've consumed nought or the
2103 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2104 -- finding the next split marker.
2106 case break (`elem` split_markers) xs of
2107 (p, _:ds) -> (p, ds)
2110 split_markers :: [Char]
2111 split_markers = [':', ';']
2113 dir_markers :: [Char]
2114 dir_markers = ['/', '\\']
2117 -- -----------------------------------------------------------------------------
2118 -- tmpDir, where we store temporary files.
2120 setTmpDir :: FilePath -> DynFlags -> DynFlags
2121 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2122 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2123 -- seem necessary now --SDM 7/2/2008
2125 -----------------------------------------------------------------------------
2128 setRtsOpts :: String -> DynP ()
2129 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2131 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2132 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2134 -----------------------------------------------------------------------------
2137 setOptHpcDir :: String -> DynP ()
2138 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2140 -----------------------------------------------------------------------------
2141 -- Via-C compilation stuff
2143 -- There are some options that we need to pass to gcc when compiling
2144 -- Haskell code via C, but are only supported by recent versions of
2145 -- gcc. The configure script decides which of these options we need,
2146 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2147 -- read before each via-C compilation. The advantage of having these
2148 -- in a separate file is that the file can be created at install-time
2149 -- depending on the available gcc version, and even re-generated later
2150 -- if gcc is upgraded.
2152 -- The options below are not dependent on the version of gcc, only the
2155 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2156 [String]) -- for registerised HC compilations
2157 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2158 in (cCcOpts ++ flagsAll, flagsRegHc)
2160 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2161 [String]) -- for registerised HC compilations
2162 machdepCCOpts' _dflags
2163 #if alpha_TARGET_ARCH
2165 #ifdef HAVE_THREADED_RTS_SUPPORT
2169 -- For now, to suppress the gcc warning "call-clobbered
2170 -- register used for global register variable", we simply
2171 -- disable all warnings altogether using the -w flag. Oh well.
2173 #elif hppa_TARGET_ARCH
2174 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2175 -- (very nice, but too bad the HP /usr/include files don't agree.)
2176 = ( ["-D_HPUX_SOURCE"], [] )
2178 #elif m68k_TARGET_ARCH
2179 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2180 -- popping of args to routines to be explicit; if we let things
2181 -- be deferred 'til after an STGJUMP, imminent death is certain!
2183 -- -fomit-frame-pointer : *don't*
2184 -- It's better to have a6 completely tied up being a frame pointer
2185 -- rather than let GCC pick random things to do with it.
2186 -- (If we want to steal a6, then we would try to do things
2187 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2188 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2190 #elif i386_TARGET_ARCH
2191 -- -fno-defer-pop : basically the same game as for m68k
2193 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2194 -- the fp (%ebp) for our register maps.
2195 = let n_regs = stolen_x86_regs _dflags
2198 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2201 "-fomit-frame-pointer",
2202 -- we want -fno-builtin, because when gcc inlines
2203 -- built-in functions like memcpy() it tends to
2204 -- run out of registers, requiring -monly-n-regs
2206 "-DSTOLEN_X86_REGS="++show n_regs ]
2209 #elif ia64_TARGET_ARCH
2210 = ( [], ["-fomit-frame-pointer", "-G0"] )
2212 #elif x86_64_TARGET_ARCH
2215 ["-fomit-frame-pointer",
2216 "-fno-asynchronous-unwind-tables",
2217 -- the unwind tables are unnecessary for HC code,
2218 -- and get in the way of -split-objs. Another option
2219 -- would be to throw them away in the mangler, but this
2222 -- calling builtins like strlen() using the FFI can
2223 -- cause gcc to run out of regs, so use the external
2227 #elif sparc_TARGET_ARCH
2229 -- For now, to suppress the gcc warning "call-clobbered
2230 -- register used for global register variable", we simply
2231 -- disable all warnings altogether using the -w flag. Oh well.
2233 #elif powerpc_apple_darwin_TARGET
2235 -- Disable Apple's precompiling preprocessor. It's a great thing
2236 -- for "normal" programs, but it doesn't support register variable
2238 = ( [], ["-no-cpp-precomp"] )
2243 picCCOpts :: DynFlags -> [String]
2245 #if darwin_TARGET_OS
2246 -- Apple prefers to do things the other way round.
2247 -- PIC is on by default.
2248 -- -mdynamic-no-pic:
2249 -- Turn off PIC code generation.
2251 -- Don't generate "common" symbols - these are unwanted
2252 -- in dynamic libraries.
2255 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2257 = ["-mdynamic-no-pic"]
2258 #elif mingw32_TARGET_OS
2259 -- no -fPIC for Windows
2261 = ["-U __PIC__","-D__PIC__"]
2265 -- we need -fPIC for C files when we are compiling with -dynamic,
2266 -- otherwise things like stub.c files don't get compiled
2267 -- correctly. They need to reference data in the Haskell
2268 -- objects, but can't without -fPIC. See
2269 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2270 | opt_PIC || not opt_Static
2271 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2276 -- -----------------------------------------------------------------------------
2280 can_split = cSplitObjs == "YES"
2282 -- -----------------------------------------------------------------------------
2285 data Printable = String String
2286 | FromDynFlags (DynFlags -> String)
2288 compilerInfo :: [(String, Printable)]
2289 compilerInfo = [("Project name", String cProjectName),
2290 ("Project version", String cProjectVersion),
2291 ("Booter version", String cBooterVersion),
2292 ("Stage", String cStage),
2293 ("Build platform", String cBuildPlatform),
2294 ("Host platform", String cHostPlatform),
2295 ("Target platform", String cTargetPlatform),
2296 ("Have interpreter", String cGhcWithInterpreter),
2297 ("Object splitting", String cSplitObjs),
2298 ("Have native code generator", String cGhcWithNativeCodeGen),
2299 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2300 ("Support SMP", String cGhcWithSMP),
2301 ("Unregisterised", String cGhcUnregisterised),
2302 ("Tables next to code", String cGhcEnableTablesNextToCode),
2303 ("RTS ways", String cGhcRTSWays),
2304 ("Leading underscore", String cLeadingUnderscore),
2305 ("Debug on", String (show debugIsOn)),
2306 ("LibDir", FromDynFlags topDir),
2307 ("Global Package DB", FromDynFlags systemPackageConfig)