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_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
297 | Opt_ForeignFunctionInterface
298 | Opt_UnliftedFFITypes
299 | Opt_GHCForeignImportPrim
300 | Opt_PArr -- Syntactic support for parallel arrays
301 | Opt_Arrows -- Arrow-notation syntax
302 | Opt_TemplateHaskell
305 | Opt_Generics -- "Derivable type classes"
306 | Opt_ImplicitPrelude
307 | Opt_ScopedTypeVariables
311 | Opt_OverloadedStrings
312 | Opt_DisambiguateRecordFields
313 | Opt_RecordWildCards
318 | Opt_RelaxedPolyRec -- Deprecated
320 | Opt_DoAndIfThenElse
322 | Opt_StandaloneDeriving
323 | Opt_DeriveDataTypeable
325 | Opt_DeriveTraversable
328 | Opt_TypeSynonymInstances
329 | Opt_FlexibleContexts
330 | Opt_FlexibleInstances
331 | Opt_ConstrainedClassMethods
332 | Opt_MultiParamTypeClasses
333 | Opt_FunctionalDependencies
335 | Opt_PolymorphicComponents
336 | Opt_ExistentialQuantification
340 | Opt_ParallelListComp
341 | Opt_TransformListComp
342 | Opt_GeneralizedNewtypeDeriving
345 | Opt_PostfixOperators
348 | Opt_LiberalTypeSynonyms
351 | Opt_ImpredicativeTypes
354 | Opt_NewQualifiedOperators
356 | Opt_AlternativeLayoutRule
357 | Opt_AlternativeLayoutRuleTransitional
358 | Opt_DatatypeContexts
361 -- | Contains not only a collection of 'DynFlag's but also a plethora of
362 -- information relating to the compilation of a single file or GHC session
363 data DynFlags = DynFlags {
366 hscTarget :: HscTarget,
367 hscOutName :: String, -- ^ Name of the output file
368 extCoreName :: String, -- ^ Name of the .hcr output file
369 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
370 optLevel :: Int, -- ^ Optimisation level
371 simplPhases :: Int, -- ^ Number of simplifier phases
372 maxSimplIterations :: Int, -- ^ Max simplifier iterations
373 shouldDumpSimplPhase :: Maybe String,
374 ruleCheck :: Maybe String,
375 strictnessBefore :: [Int], -- ^ Additional demand analysis
377 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
378 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
379 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
381 #ifndef OMIT_NATIVE_CODEGEN
382 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
384 stolen_x86_regs :: Int,
385 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
386 importPaths :: [FilePath],
388 mainFunIs :: Maybe String,
389 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
391 dphBackend :: DPHBackend,
393 thisPackage :: PackageId, -- ^ name of package currently being compiled
396 ways :: [Way], -- ^ Way flags from the command line
397 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
398 rtsBuildTag :: String, -- ^ The RTS \"way\"
400 -- For object splitting
401 splitInfo :: Maybe (String,Int),
404 objectDir :: Maybe String,
405 dylibInstallName :: Maybe String,
406 hiDir :: Maybe String,
407 stubDir :: Maybe String,
413 outputFile :: Maybe String,
414 outputHi :: Maybe String,
415 dynLibLoader :: DynLibLoader,
417 -- | This is set by 'DriverPipeline.runPipeline' based on where
418 -- its output is going.
419 dumpPrefix :: Maybe FilePath,
421 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
422 -- Set by @-ddump-file-prefix@
423 dumpPrefixForce :: Maybe FilePath,
425 includePaths :: [String],
426 libraryPaths :: [String],
427 frameworkPaths :: [String], -- used on darwin only
428 cmdlineFrameworks :: [String], -- ditto
429 tmpDir :: String, -- no trailing '/'
431 ghcUsagePath :: FilePath, -- Filled in by SysTools
432 ghciUsagePath :: FilePath, -- ditto
433 rtsOpts :: Maybe String,
434 rtsOptsEnabled :: RtsOptsEnabled,
436 hpcDir :: String, -- ^ Path to store the .mix files
438 -- options for particular phases
446 opt_windres :: [String],
447 opt_lo :: [String], -- LLVM: llvm optimiser
448 opt_lc :: [String], -- LLVM: llc static compiler
450 -- commands for particular phases
452 pgm_P :: (String,[Option]),
454 pgm_c :: (String,[Option]),
455 pgm_m :: (String,[Option]),
456 pgm_s :: (String,[Option]),
457 pgm_a :: (String,[Option]),
458 pgm_l :: (String,[Option]),
459 pgm_dll :: (String,[Option]),
461 pgm_sysman :: String,
462 pgm_windres :: String,
463 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
464 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
467 depMakefile :: FilePath,
468 depIncludePkgDeps :: Bool,
469 depExcludeMods :: [ModuleName],
470 depSuffixes :: [String],
473 extraPkgConfs :: [FilePath],
474 topDir :: FilePath, -- filled in by SysTools
475 systemPackageConfig :: FilePath, -- ditto
476 -- ^ The @-package-conf@ flags given on the command line, in the order
479 packageFlags :: [PackageFlag],
480 -- ^ The @-package@ and @-hide-package@ flags from the command-line
483 -- NB. do not modify this field, it is calculated by
484 -- Packages.initPackages and Packages.updatePackages.
485 pkgDatabase :: Maybe [PackageConfig],
486 pkgState :: PackageState,
489 -- These have to be IORefs, because the defaultCleanupHandler needs to
490 -- know what to clean when an exception happens
491 filesToClean :: IORef [FilePath],
492 dirsToClean :: IORef (FiniteMap FilePath FilePath),
496 language :: Maybe Language,
497 extensionFlags :: Either [OnOff ExtensionFlag]
500 -- | Message output action: use "ErrUtils" instead of this if you can
501 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
503 haddockOptions :: Maybe String
506 wayNames :: DynFlags -> [WayName]
507 wayNames = map wayName . ways
509 -- | The target code type of the compilation (if any).
511 -- Whenever you change the target, also make sure to set 'ghcLink' to
512 -- something sensible.
514 -- 'HscNothing' can be used to avoid generating any output, however, note
517 -- * This will not run the desugaring step, thus no warnings generated in
518 -- this step will be output. In particular, this includes warnings related
519 -- to pattern matching. You can run the desugarer manually using
520 -- 'GHC.desugarModule'.
522 -- * If a program uses Template Haskell the typechecker may try to run code
523 -- from an imported module. This will fail if no code has been generated
524 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
525 -- whether this might be the case and choose to either switch to a
526 -- different target or avoid typechecking such modules. (The latter may
527 -- preferable for security reasons.)
530 = HscC -- ^ Generate C code.
531 | HscAsm -- ^ Generate assembly using the native code generator.
532 | HscLlvm -- ^ Generate assembly using the llvm code generator.
533 | HscJava -- ^ Generate Java bytecode.
534 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
535 | HscNothing -- ^ Don't generate any code. See notes above.
538 -- | Will this target result in an object file on the disk?
539 isObjectTarget :: HscTarget -> Bool
540 isObjectTarget HscC = True
541 isObjectTarget HscAsm = True
542 isObjectTarget HscLlvm = True
543 isObjectTarget _ = False
545 -- | The 'GhcMode' tells us whether we're doing multi-module
546 -- compilation (controlled via the "GHC" API) or one-shot
547 -- (single-module) compilation. This makes a difference primarily to
548 -- the "Finder": in one-shot mode we look for interface files for
549 -- imported modules, but in multi-module mode we look for source files
550 -- in order to check whether they need to be recompiled.
552 = CompManager -- ^ @\-\-make@, GHCi, etc.
553 | OneShot -- ^ @ghc -c Foo.hs@
554 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
557 instance Outputable GhcMode where
558 ppr CompManager = ptext (sLit "CompManager")
559 ppr OneShot = ptext (sLit "OneShot")
560 ppr MkDepend = ptext (sLit "MkDepend")
562 isOneShot :: GhcMode -> Bool
563 isOneShot OneShot = True
564 isOneShot _other = False
566 -- | What to do in the link step, if there is one.
568 = NoLink -- ^ Don't link at all
569 | LinkBinary -- ^ Link object code into a binary
570 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
571 -- bytecode and object code).
572 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
575 isNoLink :: GhcLink -> Bool
576 isNoLink NoLink = True
579 -- Is it worth evaluating this Bool and caching it in the DynFlags value
580 -- during initDynFlags?
581 doingTickyProfiling :: DynFlags -> Bool
582 doingTickyProfiling _ = opt_Ticky
583 -- XXX -ticky is a static flag, because it implies -debug which is also
584 -- static. If the way flags were made dynamic, we could fix this.
587 = ExposePackage String
588 | ExposePackageId String
590 | IgnorePackage String
593 defaultHscTarget :: HscTarget
594 defaultHscTarget = defaultObjectTarget
596 -- | The 'HscTarget' value corresponding to the default way to create
597 -- object files on the current platform.
598 defaultObjectTarget :: HscTarget
600 | cGhcWithNativeCodeGen == "YES" = HscAsm
608 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
610 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
611 initDynFlags :: DynFlags -> IO DynFlags
612 initDynFlags dflags = do
613 -- someday these will be dynamic flags
614 ways <- readIORef v_Ways
615 refFilesToClean <- newIORef []
616 refDirsToClean <- newIORef emptyFM
619 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
620 rtsBuildTag = mkBuildTag ways,
621 filesToClean = refFilesToClean,
622 dirsToClean = refDirsToClean
625 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
626 -- and must be fully initialized by 'GHC.newSession' first.
627 defaultDynFlags :: DynFlags
630 ghcMode = CompManager,
631 ghcLink = LinkBinary,
632 hscTarget = defaultHscTarget,
638 maxSimplIterations = 4,
639 shouldDumpSimplPhase = Nothing,
641 specConstrThreshold = Just 200,
642 specConstrCount = Just 3,
643 liberateCaseThreshold = Just 200,
644 strictnessBefore = [],
646 #ifndef OMIT_NATIVE_CODEGEN
647 targetPlatform = defaultTargetPlatform,
650 cmdlineHcIncludes = [],
654 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
658 thisPackage = mainPackageId,
661 dylibInstallName = Nothing,
665 objectSuf = phaseInputExt StopLn,
666 hcSuf = phaseInputExt HCc,
669 outputFile = Nothing,
671 dynLibLoader = SystemDependent,
672 dumpPrefix = Nothing,
673 dumpPrefixForce = Nothing,
677 cmdlineFrameworks = [],
678 tmpDir = cDEFAULT_TMPDIR,
680 rtsOptsEnabled = RtsOptsSafeOnly,
686 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
699 pkgDatabase = Nothing,
700 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
701 ways = panic "defaultDynFlags: No ways",
702 buildTag = panic "defaultDynFlags: No buildTag",
703 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
705 -- initSysTools fills all these in
706 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
707 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
708 topDir = panic "defaultDynFlags: No topDir",
709 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
710 pgm_L = panic "defaultDynFlags: No pgm_L",
711 pgm_P = panic "defaultDynFlags: No pgm_P",
712 pgm_F = panic "defaultDynFlags: No pgm_F",
713 pgm_c = panic "defaultDynFlags: No pgm_c",
714 pgm_m = panic "defaultDynFlags: No pgm_m",
715 pgm_s = panic "defaultDynFlags: No pgm_s",
716 pgm_a = panic "defaultDynFlags: No pgm_a",
717 pgm_l = panic "defaultDynFlags: No pgm_l",
718 pgm_dll = panic "defaultDynFlags: No pgm_dll",
719 pgm_T = panic "defaultDynFlags: No pgm_T",
720 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
721 pgm_windres = panic "defaultDynFlags: No pgm_windres",
722 pgm_lo = panic "defaultDynFlags: No pgm_lo",
723 pgm_lc = panic "defaultDynFlags: No pgm_lc",
724 -- end of initSysTools values
726 depMakefile = "Makefile",
727 depIncludePkgDeps = False,
730 -- end of ghc -M values
731 filesToClean = panic "defaultDynFlags: No filesToClean",
732 dirsToClean = panic "defaultDynFlags: No dirsToClean",
733 haddockOptions = Nothing,
735 Opt_AutoLinkPackages,
736 Opt_ReadUserPackageConf,
746 Opt_PrintBindContents
748 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
749 -- The default -O0 options
753 extensionFlags = Left [],
755 log_action = \severity srcSpan style msg ->
757 SevOutput -> printOutput (msg style)
758 SevInfo -> printErrs (msg style)
759 SevFatal -> printErrs (msg style)
762 printErrs ((mkLocMessage srcSpan msg) style)
763 -- careful (#2302): printErrs prints in UTF-8, whereas
764 -- converting to string first and using hPutStr would
765 -- just emit the low 8 bits of each unicode char.
769 Note [Verbosity levels]
770 ~~~~~~~~~~~~~~~~~~~~~~~
771 0 | print errors & warnings only
772 1 | minimal verbosity: print "compiling M ... done." for each module.
773 2 | equivalent to -dshow-passes
774 3 | equivalent to existing "ghc -v"
775 4 | "ghc -v -ddump-most"
776 5 | "ghc -v -ddump-all"
782 flattenExtensionFlags :: DynFlags -> DynFlags
783 flattenExtensionFlags dflags
784 = case extensionFlags dflags of
787 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
790 panic "Flattening already-flattened extension flags"
792 ensureFlattenedExtensionFlags :: DynFlags -> DynFlags
793 ensureFlattenedExtensionFlags dflags
794 = case extensionFlags dflags of
797 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
802 -- OnOffs accumulate in reverse order, so we use foldr in order to
803 -- process them in the right order
804 flattenExtensionFlags' :: Maybe Language -> [OnOff ExtensionFlag]
806 flattenExtensionFlags' ml = foldr f defaultExtensionFlags
807 where f (On f) flags = f : delete f flags
808 f (Off f) flags = delete f flags
809 defaultExtensionFlags = languageExtensions ml
811 languageExtensions :: Maybe Language -> [ExtensionFlag]
812 languageExtensions Nothing
813 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
814 -- behaviour the default, to see if anyone notices
816 : languageExtensions (Just Haskell2010)
817 languageExtensions (Just Haskell98)
818 = [Opt_ImplicitPrelude,
819 Opt_MonomorphismRestriction,
821 Opt_DatatypeContexts]
822 languageExtensions (Just Haskell2010)
823 = [Opt_ImplicitPrelude,
824 Opt_MonomorphismRestriction,
825 Opt_DatatypeContexts,
827 Opt_ForeignFunctionInterface,
832 -- The DOpt class is a temporary workaround, to avoid having to do
833 -- a mass-renaming dopt->lopt at the moment
835 dopt :: a -> DynFlags -> Bool
836 dopt_set :: DynFlags -> a -> DynFlags
837 dopt_unset :: DynFlags -> a -> DynFlags
839 instance DOpt DynFlag where
842 dopt_unset = dopt_unset'
844 instance DOpt ExtensionFlag where
847 dopt_unset = lopt_unset
849 -- | Test whether a 'DynFlag' is set
850 dopt' :: DynFlag -> DynFlags -> Bool
851 dopt' f dflags = f `elem` (flags dflags)
854 dopt_set' :: DynFlags -> DynFlag -> DynFlags
855 dopt_set' dfs f = dfs{ flags = f : flags dfs }
857 -- | Unset a 'DynFlag'
858 dopt_unset' :: DynFlags -> DynFlag -> DynFlags
859 dopt_unset' dfs f = dfs{ flags = filter (/= f) (flags dfs) }
861 -- | Test whether a 'ExtensionFlag' is set
862 lopt :: ExtensionFlag -> DynFlags -> Bool
863 lopt f dflags = case extensionFlags dflags of
864 Left _ -> panic ("Testing for extension flag " ++ show f ++ " before flattening")
865 Right flags -> f `elem` flags
867 -- | Set a 'ExtensionFlag'
868 lopt_set :: DynFlags -> ExtensionFlag -> DynFlags
869 lopt_set dfs f = case extensionFlags dfs of
870 Left onoffs -> dfs { extensionFlags = Left (On f : onoffs) }
871 Right _ -> panic ("Setting extension flag " ++ show f ++ " after flattening")
873 -- | Set a 'ExtensionFlag'
874 lopt_set_flattened :: DynFlags -> ExtensionFlag -> DynFlags
875 lopt_set_flattened dfs f = case extensionFlags dfs of
877 panic ("Setting extension flag " ++ show f ++ " before flattening, but expected flattened")
879 dfs { extensionFlags = Right (f : delete f flags) }
881 -- | Unset a 'ExtensionFlag'
882 lopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
883 lopt_unset dfs f = case extensionFlags dfs of
884 Left onoffs -> dfs { extensionFlags = Left (Off f : onoffs) }
885 Right _ -> panic ("Unsetting extension flag " ++ show f ++ " after flattening")
887 -- | Unset a 'ExtensionFlag'
888 lopt_unset_flattened :: DynFlags -> ExtensionFlag -> DynFlags
889 lopt_unset_flattened dfs f = case extensionFlags dfs of
891 panic ("Unsetting extension flag " ++ show f ++ " before flattening, but expected flattened")
893 dfs { extensionFlags = Right (delete f flags) }
895 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
896 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
897 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
898 -> [a] -- ^ Correctly ordered extracted options
899 getOpts dflags opts = reverse (opts dflags)
900 -- We add to the options from the front, so we need to reverse the list
902 -- | Gets the verbosity flag for the current verbosity level. This is fed to
903 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
904 getVerbFlag :: DynFlags -> String
906 | verbosity dflags >= 3 = "-v"
909 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
910 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
911 setPgmP, addOptl, addOptP,
912 addCmdlineFramework, addHaddockOpts
913 :: String -> DynFlags -> DynFlags
914 setOutputFile, setOutputHi, setDumpPrefixForce
915 :: Maybe String -> DynFlags -> DynFlags
917 setObjectDir f d = d{ objectDir = Just f}
918 setHiDir f d = d{ hiDir = Just f}
919 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
920 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
921 -- \#included from the .hc file when compiling with -fvia-C.
922 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
923 setDylibInstallName f d = d{ dylibInstallName = Just f}
925 setObjectSuf f d = d{ objectSuf = f}
926 setHiSuf f d = d{ hiSuf = f}
927 setHcSuf f d = d{ hcSuf = f}
929 setOutputFile f d = d{ outputFile = f}
930 setOutputHi f d = d{ outputHi = f}
932 parseDynLibLoaderMode f d =
934 ("deploy", "") -> d{ dynLibLoader = Deployable }
935 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
936 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
938 setDumpPrefixForce f d = d { dumpPrefixForce = f}
940 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
941 -- Config.hs should really use Option.
942 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
943 addOptl f d = d{ opt_l = f : opt_l d}
944 addOptP f d = d{ opt_P = f : opt_P d}
947 setDepMakefile :: FilePath -> DynFlags -> DynFlags
948 setDepMakefile f d = d { depMakefile = deOptDep f }
950 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
951 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
953 addDepExcludeMod :: String -> DynFlags -> DynFlags
955 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
957 addDepSuffix :: FilePath -> DynFlags -> DynFlags
958 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
961 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
962 -- we need to strip the "-optdep" off of the arg
963 deOptDep :: String -> String
964 deOptDep x = case stripPrefix "-optdep" x of
968 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
970 addHaddockOpts f d = d{ haddockOptions = Just f}
972 -- -----------------------------------------------------------------------------
973 -- Command-line options
975 -- | When invoking external tools as part of the compilation pipeline, we
976 -- pass these a sequence of options on the command-line. Rather than
977 -- just using a list of Strings, we use a type that allows us to distinguish
978 -- between filepaths and 'other stuff'. The reason for this is that
979 -- this type gives us a handle on transforming filenames, and filenames only,
980 -- to whatever format they're expected to be on a particular platform.
982 = FileOption -- an entry that _contains_ filename(s) / filepaths.
983 String -- a non-filepath prefix that shouldn't be
984 -- transformed (e.g., "/out=")
985 String -- the filepath/filename portion
988 showOpt :: Option -> String
989 showOpt (FileOption pre f) = pre ++ f
990 showOpt (Option s) = s
992 -----------------------------------------------------------------------------
993 -- Setting the optimisation level
995 updOptLevel :: Int -> DynFlags -> DynFlags
996 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
998 = dfs2{ optLevel = final_n }
1000 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1001 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1002 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1004 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1005 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1007 optLevelFlags :: [([Int], DynFlag)]
1009 = [ ([0], Opt_IgnoreInterfacePragmas)
1010 , ([0], Opt_OmitInterfacePragmas)
1012 , ([1,2], Opt_IgnoreAsserts)
1013 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1015 , ([1,2], Opt_DoEtaReduction)
1016 , ([1,2], Opt_CaseMerge)
1017 , ([1,2], Opt_Strictness)
1019 , ([1,2], Opt_FullLaziness)
1020 , ([1,2], Opt_Specialise)
1021 , ([1,2], Opt_FloatIn)
1023 , ([2], Opt_LiberateCase)
1024 , ([2], Opt_SpecConstr)
1025 , ([2], Opt_RegsGraph)
1027 -- , ([2], Opt_StaticArgumentTransformation)
1028 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1029 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1030 -- several improvements to the heuristics, and I'm concerned that without
1031 -- those changes SAT will interfere with some attempts to write "high
1032 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1033 -- this year. In particular, the version in HEAD lacks the tail call
1034 -- criterion, so many things that look like reasonable loops will be
1035 -- turned into functions with extra (unneccesary) thunk creation.
1037 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1038 -- This one is important for a tiresome reason:
1039 -- we want to make sure that the bindings for data
1040 -- constructors are eta-expanded. This is probably
1041 -- a good thing anyway, but it seems fragile.
1044 -- -----------------------------------------------------------------------------
1045 -- Standard sets of warning options
1047 standardWarnings :: [DynFlag]
1049 = [ Opt_WarnWarningsDeprecations,
1050 Opt_WarnDeprecatedFlags,
1051 Opt_WarnUnrecognisedPragmas,
1052 Opt_WarnOverlappingPatterns,
1053 Opt_WarnMissingFields,
1054 Opt_WarnMissingMethods,
1055 Opt_WarnDuplicateExports,
1056 Opt_WarnLazyUnliftedBindings,
1057 Opt_WarnDodgyForeignImports,
1058 Opt_WarnWrongDoBind,
1059 Opt_WarnAlternativeLayoutRuleTransitional
1062 minusWOpts :: [DynFlag]
1064 = standardWarnings ++
1065 [ Opt_WarnUnusedBinds,
1066 Opt_WarnUnusedMatches,
1067 Opt_WarnUnusedImports,
1068 Opt_WarnIncompletePatterns,
1069 Opt_WarnDodgyExports,
1070 Opt_WarnDodgyImports
1073 minusWallOpts :: [DynFlag]
1076 [ Opt_WarnTypeDefaults,
1077 Opt_WarnNameShadowing,
1078 Opt_WarnMissingSigs,
1081 Opt_WarnUnusedDoBind
1084 -- minuswRemovesOpts should be every warning option
1085 minuswRemovesOpts :: [DynFlag]
1088 [Opt_WarnImplicitPrelude,
1089 Opt_WarnIncompletePatternsRecUpd,
1090 Opt_WarnSimplePatterns,
1091 Opt_WarnMonomorphism,
1092 Opt_WarnUnrecognisedPragmas,
1096 -- -----------------------------------------------------------------------------
1097 -- StgToDo: abstraction of stg-to-stg passes to run.
1100 = StgDoMassageForProfiling -- should be (next to) last
1101 -- There's also setStgVarInfo, but its absolute "lastness"
1102 -- is so critical that it is hardwired in (no flag).
1105 getStgToDo :: DynFlags -> [StgToDo]
1109 stg_stats = dopt Opt_StgStats dflags
1111 todo1 = if stg_stats then [D_stg_stats] else []
1113 todo2 | WayProf `elem` wayNames dflags
1114 = StgDoMassageForProfiling : todo1
1118 {- **********************************************************************
1122 %********************************************************************* -}
1124 -- -----------------------------------------------------------------------------
1125 -- Parsing the dynamic flags.
1127 -- | Parse dynamic flags from a list of command line arguments. Returns the
1128 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1129 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1130 -- flags or missing arguments).
1131 parseDynamicFlags :: Monad m =>
1132 DynFlags -> [Located String]
1133 -> m (DynFlags, [Located String], [Located String])
1134 -- ^ Updated 'DynFlags', left-over arguments, and
1135 -- list of warnings.
1136 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1138 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1139 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1140 parseDynamicNoPackageFlags :: Monad m =>
1141 DynFlags -> [Located String]
1142 -> m (DynFlags, [Located String], [Located String])
1143 -- ^ Updated 'DynFlags', left-over arguments, and
1144 -- list of warnings.
1145 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1147 parseDynamicFlags_ :: Monad m =>
1148 DynFlags -> [Located String] -> Bool
1149 -> m (DynFlags, [Located String], [Located String])
1150 parseDynamicFlags_ dflags0 args pkg_flags = do
1151 -- XXX Legacy support code
1152 -- We used to accept things like
1153 -- optdep-f -optdepdepend
1154 -- optdep-f -optdep depend
1155 -- optdep -f -optdepdepend
1156 -- optdep -f -optdep depend
1157 -- but the spaces trip up proper argument handling. So get rid of them.
1158 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1159 f (x : xs) = x : f xs
1163 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1164 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1165 | otherwise = dynamic_flags
1167 let ((leftover, errs, warns), dflags1)
1168 = runCmdLine (processArgs flag_spec args') dflags0
1169 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1171 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1172 -- isn't up to the job. We know that if hscTarget == HscC, then the
1173 -- user has explicitly used -fvia-C, because -fasm is the default,
1174 -- unless there is no NCG on this platform. The latter case is
1175 -- checked when the -fPIC flag is parsed.
1177 let (pic_warns, dflags2)
1178 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1179 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1180 dflags1{ hscTarget = HscAsm })
1181 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1182 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1183 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1184 ++ "dynamic on this platform;\n ignoring -fllvm"],
1185 dflags1{ hscTarget = HscAsm })
1187 | otherwise = ([], dflags1)
1189 return (dflags2, leftover, pic_warns ++ warns)
1192 {- **********************************************************************
1194 DynFlags specifications
1196 %********************************************************************* -}
1198 allFlags :: [String]
1199 allFlags = map ('-':) $
1200 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1201 map ("fno-"++) flags ++
1202 map ("f"++) flags ++
1203 map ("f"++) flags' ++
1204 map ("X"++) supportedExtensions
1205 where ok (PrefixPred _ _) = False
1207 flags = [ name | (name, _, _) <- fFlags ]
1208 flags' = [ name | (name, _, _) <- fLangFlags ]
1210 --------------- The main flags themselves ------------------
1211 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1213 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1214 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1215 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1217 (HasArg (\s -> do { addCmdlineHCInclude s
1218 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1219 , Flag "v" (OptIntSuffix setVerbosity)
1221 ------- Specific phases --------------------------------------------
1222 -- need to appear before -pgmL to be parsed as LLVM flags.
1223 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1224 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1225 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1226 , Flag "pgmP" (hasArg setPgmP)
1227 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1228 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1229 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1230 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1231 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1232 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1233 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1234 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1236 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1237 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1238 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1239 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1240 , Flag "optP" (hasArg addOptP)
1241 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1242 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1243 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1244 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1245 , Flag "optl" (hasArg addOptl)
1246 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1249 (NoArg (if can_split
1250 then setDynFlag Opt_SplitObjs
1251 else addWarn "ignoring -fsplit-objs"))
1253 -------- ghc -M -----------------------------------------------------
1254 , Flag "dep-suffix" (hasArg addDepSuffix)
1255 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1256 , Flag "dep-makefile" (hasArg setDepMakefile)
1257 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1258 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1259 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1260 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1261 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1262 , Flag "exclude-module" (hasArg addDepExcludeMod)
1263 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1264 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1266 -------- Linking ----------------------------------------------------
1267 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1268 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1269 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1270 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1272 ------- Libraries ---------------------------------------------------
1273 , Flag "L" (Prefix addLibraryPath)
1274 , Flag "l" (AnySuffix (upd . addOptl))
1276 ------- Frameworks --------------------------------------------------
1277 -- -framework-path should really be -F ...
1278 , Flag "framework-path" (HasArg addFrameworkPath)
1279 , Flag "framework" (hasArg addCmdlineFramework)
1281 ------- Output Redirection ------------------------------------------
1282 , Flag "odir" (hasArg setObjectDir)
1283 , Flag "o" (SepArg (upd . setOutputFile . Just))
1284 , Flag "ohi" (hasArg (setOutputHi . Just ))
1285 , Flag "osuf" (hasArg setObjectSuf)
1286 , Flag "hcsuf" (hasArg setHcSuf)
1287 , Flag "hisuf" (hasArg setHiSuf)
1288 , Flag "hidir" (hasArg setHiDir)
1289 , Flag "tmpdir" (hasArg setTmpDir)
1290 , Flag "stubdir" (hasArg setStubDir)
1291 , Flag "outputdir" (hasArg setOutputDir)
1292 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1294 ------- Keeping temporary files -------------------------------------
1295 -- These can be singular (think ghc -c) or plural (think ghc --make)
1296 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1297 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1298 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1299 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1300 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1301 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1302 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1303 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1304 -- This only makes sense as plural
1305 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1307 ------- Miscellaneous ----------------------------------------------
1308 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1309 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1310 , Flag "with-rtsopts" (HasArg setRtsOpts)
1311 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1312 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1313 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1314 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1315 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1316 , Flag "main-is" (SepArg setMainIs)
1317 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1318 , Flag "haddock-opts" (hasArg addHaddockOpts)
1319 , Flag "hpcdir" (SepArg setOptHpcDir)
1321 ------- recompilation checker --------------------------------------
1322 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1323 ; deprecate "Use -fno-force-recomp instead" }))
1324 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1325 ; deprecate "Use -fforce-recomp instead" }))
1327 ------ HsCpp opts ---------------------------------------------------
1328 , Flag "D" (AnySuffix (upd . addOptP))
1329 , Flag "U" (AnySuffix (upd . addOptP))
1331 ------- Include/Import Paths ----------------------------------------
1332 , Flag "I" (Prefix addIncludePath)
1333 , Flag "i" (OptPrefix addImportPath)
1335 ------ Debugging ----------------------------------------------------
1336 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1338 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1339 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1340 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1341 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1342 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1343 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1344 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1345 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1346 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1347 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1348 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1349 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1350 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1351 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1352 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1353 ; setDumpFlag' Opt_D_dump_llvm}))
1354 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1355 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1356 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1357 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1358 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1359 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1360 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1361 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1362 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1363 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1364 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1365 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1366 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1367 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1368 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1369 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1370 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1371 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1372 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1373 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1374 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1375 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1376 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1377 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1378 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1379 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1380 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1381 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1382 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1383 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1384 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1385 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1386 ; setVerboseCore2Core }))
1387 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1388 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1389 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1390 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1391 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1392 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1393 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1394 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1395 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1396 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1397 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1398 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1399 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1400 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1401 , Flag "dshow-passes" (NoArg (do forceRecompile
1402 setVerbosity (Just 2)))
1403 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1405 ------ Machine dependant (-m<blah>) stuff ---------------------------
1407 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1408 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1409 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1410 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1412 ------ Warning opts -------------------------------------------------
1413 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1414 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1415 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1416 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1417 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1418 ; deprecate "Use -w instead" }))
1419 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1421 ------ Optimisation flags ------------------------------------------
1422 , Flag "O" (noArg (setOptLevel 1))
1423 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1424 , Flag "Odph" (noArg setDPHOpt)
1425 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1426 -- If the number is missing, use 1
1428 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1429 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1430 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1431 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1432 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1433 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1434 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1435 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1436 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1437 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1438 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1440 ------ Profiling ----------------------------------------------------
1442 -- XXX Should the -f* flags be deprecated?
1443 -- They don't seem to be documented
1444 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1445 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1446 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1447 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1448 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1449 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1450 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1451 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1452 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1454 ------ DPH flags ----------------------------------------------------
1456 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1457 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1458 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1460 ------ Compiler flags -----------------------------------------------
1462 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1463 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1464 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1465 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1466 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1467 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1469 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1470 setTarget HscNothing))
1471 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1472 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1473 , Flag "fglasgow-exts" (NoArg enableGlasgowExts)
1474 , Flag "fno-glasgow-exts" (NoArg disableGlasgowExts)
1476 ++ map (mkFlag True "f" setDynFlag ) fFlags
1477 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1478 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1479 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1480 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1481 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1482 ++ map (mkFlag True "X" setLanguage) languageFlags
1484 package_flags :: [Flag (CmdLineP DynFlags)]
1486 ------- Packages ----------------------------------------------------
1487 Flag "package-conf" (HasArg extraPkgConf_)
1488 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1489 , Flag "package-name" (hasArg setPackageName)
1490 , Flag "package-id" (HasArg exposePackageId)
1491 , Flag "package" (HasArg exposePackage)
1492 , Flag "hide-package" (HasArg hidePackage)
1493 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1494 , Flag "ignore-package" (HasArg ignorePackage)
1495 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1496 ; deprecate "Use -package instead" }))
1500 = ( String -- Flag in string form
1501 , flag -- Flag in internal form
1502 , Bool -> DynP ()) -- Extra action to run when the flag is found
1503 -- Typically, emit a warning or error
1504 -- True <=> we are turning the flag on
1505 -- False <=> we are turning the flag on
1508 mkFlag :: Bool -- ^ True <=> it should be turned on
1509 -> String -- ^ The flag prefix
1510 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1511 -> FlagSpec flag -- ^ Specification of this particular flag
1512 -> Flag (CmdLineP DynFlags)
1513 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1514 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1516 deprecatedForExtension :: String -> Bool -> DynP ()
1517 deprecatedForExtension lang turn_on
1518 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1520 flag | turn_on = lang
1521 | otherwise = "No"++lang
1523 useInstead :: String -> Bool -> DynP ()
1524 useInstead flag turn_on
1525 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1527 no = if turn_on then "" else "no-"
1529 nop :: Bool -> DynP ()
1532 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1533 fFlags :: [FlagSpec DynFlag]
1535 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1536 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1537 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1538 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1539 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1540 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1541 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1542 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1543 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1544 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1545 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1546 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1547 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1548 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1549 ( "warn-simple-patterns", Opt_WarnSimplePatterns, nop ),
1550 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1551 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1552 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1553 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1554 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1555 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1556 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1557 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1558 ( "warn-orphans", Opt_WarnOrphans, nop ),
1559 ( "warn-tabs", Opt_WarnTabs, nop ),
1560 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1561 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1562 \_ -> deprecate "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1563 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1564 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1565 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1566 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1567 ( "strictness", Opt_Strictness, nop ),
1568 ( "specialise", Opt_Specialise, nop ),
1569 ( "float-in", Opt_FloatIn, nop ),
1570 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1571 ( "full-laziness", Opt_FullLaziness, nop ),
1572 ( "liberate-case", Opt_LiberateCase, nop ),
1573 ( "spec-constr", Opt_SpecConstr, nop ),
1574 ( "cse", Opt_CSE, nop ),
1575 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1576 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1577 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1578 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1579 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1580 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1581 ( "case-merge", Opt_CaseMerge, nop ),
1582 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1583 ( "method-sharing", Opt_MethodSharing, nop ),
1584 ( "dicts-cheap", Opt_DictsCheap, nop ),
1585 ( "excess-precision", Opt_ExcessPrecision, nop ),
1586 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1587 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1588 ( "print-bind-result", Opt_PrintBindResult, nop ),
1589 ( "force-recomp", Opt_ForceRecomp, nop ),
1590 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1591 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1592 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1593 ( "break-on-exception", Opt_BreakOnException, nop ),
1594 ( "break-on-error", Opt_BreakOnError, nop ),
1595 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1596 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1597 ( "run-cps", Opt_RunCPS, nop ),
1598 ( "run-cpsz", Opt_RunCPSZ, nop ),
1599 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1600 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1601 ( "vectorise", Opt_Vectorise, nop ),
1602 ( "regs-graph", Opt_RegsGraph, nop ),
1603 ( "regs-iterative", Opt_RegsIterative, nop ),
1604 ( "gen-manifest", Opt_GenManifest, nop ),
1605 ( "embed-manifest", Opt_EmbedManifest, nop ),
1606 ( "ext-core", Opt_EmitExternalCore, nop ),
1607 ( "shared-implib", Opt_SharedImplib, nop ),
1608 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1609 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1612 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1613 fLangFlags :: [FlagSpec ExtensionFlag]
1615 ( "th", Opt_TemplateHaskell,
1616 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1617 ( "fi", Opt_ForeignFunctionInterface,
1618 deprecatedForExtension "ForeignFunctionInterface" ),
1619 ( "ffi", Opt_ForeignFunctionInterface,
1620 deprecatedForExtension "ForeignFunctionInterface" ),
1621 ( "arrows", Opt_Arrows,
1622 deprecatedForExtension "Arrows" ),
1623 ( "generics", Opt_Generics,
1624 deprecatedForExtension "Generics" ),
1625 ( "implicit-prelude", Opt_ImplicitPrelude,
1626 deprecatedForExtension "ImplicitPrelude" ),
1627 ( "bang-patterns", Opt_BangPatterns,
1628 deprecatedForExtension "BangPatterns" ),
1629 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1630 deprecatedForExtension "MonomorphismRestriction" ),
1631 ( "mono-pat-binds", Opt_MonoPatBinds,
1632 deprecatedForExtension "MonoPatBinds" ),
1633 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1634 deprecatedForExtension "ExtendedDefaultRules" ),
1635 ( "implicit-params", Opt_ImplicitParams,
1636 deprecatedForExtension "ImplicitParams" ),
1637 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1638 deprecatedForExtension "ScopedTypeVariables" ),
1640 deprecatedForExtension "PArr" ),
1641 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1642 deprecatedForExtension "OverlappingInstances" ),
1643 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1644 deprecatedForExtension "UndecidableInstances" ),
1645 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1646 deprecatedForExtension "IncoherentInstances" )
1649 supportedLanguages :: [String]
1650 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1652 supportedExtensions :: [String]
1653 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1655 supportedLanguagesAndExtensions :: [String]
1656 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1658 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1659 languageFlags :: [FlagSpec Language]
1661 ( "Haskell98", Haskell98, nop ),
1662 ( "Haskell2010", Haskell2010, nop )
1665 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1666 xFlags :: [FlagSpec ExtensionFlag]
1668 ( "CPP", Opt_Cpp, nop ),
1669 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1670 ( "TupleSections", Opt_TupleSections, nop ),
1671 ( "PatternGuards", Opt_PatternGuards, nop ),
1672 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1673 ( "MagicHash", Opt_MagicHash, nop ),
1674 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1675 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1676 ( "KindSignatures", Opt_KindSignatures, nop ),
1677 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1678 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1679 ( "TransformListComp", Opt_TransformListComp, nop ),
1680 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1681 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1682 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1683 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1684 ( "Rank2Types", Opt_Rank2Types, nop ),
1685 ( "RankNTypes", Opt_RankNTypes, nop ),
1686 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1687 \_ -> deprecate "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1688 ( "TypeOperators", Opt_TypeOperators, nop ),
1689 ( "RecursiveDo", Opt_RecursiveDo,
1690 deprecatedForExtension "DoRec"),
1691 ( "DoRec", Opt_DoRec, nop ),
1692 ( "Arrows", Opt_Arrows, nop ),
1693 ( "PArr", Opt_PArr, nop ),
1694 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1695 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1696 ( "Generics", Opt_Generics, nop ),
1697 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1698 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1699 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1700 ( "RecordPuns", Opt_RecordPuns,
1701 deprecatedForExtension "NamedFieldPuns" ),
1702 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1703 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1704 ( "GADTs", Opt_GADTs, nop ),
1705 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1706 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1707 ( "BangPatterns", Opt_BangPatterns, nop ),
1708 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1709 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1710 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1711 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1712 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1713 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1714 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1715 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1716 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1717 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, nop ),
1718 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1719 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1720 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1722 ( "PatternSignatures", Opt_ScopedTypeVariables,
1723 deprecatedForExtension "ScopedTypeVariables" ),
1725 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1726 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1727 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1728 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1729 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1730 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1731 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1732 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1733 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1734 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1735 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1736 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1737 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1738 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1739 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1740 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1741 ( "PackageImports", Opt_PackageImports, nop ),
1742 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1743 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1746 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1748 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1749 , (Opt_Rank2Types, Opt_ExplicitForAll)
1750 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1751 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1752 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1753 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1755 , (Opt_GADTs, Opt_OutsideIn) -- We want type-sig variables to
1756 -- be completely rigid for GADTs
1758 , (Opt_TypeFamilies, Opt_OutsideIn) -- Trac #2944 gives a nice example
1759 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1760 -- all over the place
1762 , (Opt_ScopedTypeVariables, Opt_OutsideIn) -- Ditto for scoped type variables; see
1763 -- Note [Scoped tyvars] in TcBinds
1764 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1766 -- Record wild-cards implies field disambiguation
1767 -- Otherwise if you write (C {..}) you may well get
1768 -- stuff like " 'a' not in scope ", which is a bit silly
1769 -- if the compiler has just filled in field 'a' of constructor 'C'
1770 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1773 enableGlasgowExts :: DynP ()
1774 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1775 mapM_ setExtensionFlag glasgowExtsFlags
1777 disableGlasgowExts :: DynP ()
1778 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1779 mapM_ unSetExtensionFlag glasgowExtsFlags
1781 glasgowExtsFlags :: [ExtensionFlag]
1782 glasgowExtsFlags = [
1783 Opt_ForeignFunctionInterface
1784 , Opt_UnliftedFFITypes
1786 , Opt_ImplicitParams
1787 , Opt_ScopedTypeVariables
1789 , Opt_TypeSynonymInstances
1790 , Opt_StandaloneDeriving
1791 , Opt_DeriveDataTypeable
1793 , Opt_DeriveFoldable
1794 , Opt_DeriveTraversable
1795 , Opt_FlexibleContexts
1796 , Opt_FlexibleInstances
1797 , Opt_ConstrainedClassMethods
1798 , Opt_MultiParamTypeClasses
1799 , Opt_FunctionalDependencies
1801 , Opt_PolymorphicComponents
1802 , Opt_ExistentialQuantification
1804 , Opt_PostfixOperators
1806 , Opt_LiberalTypeSynonyms
1810 , Opt_ParallelListComp
1811 , Opt_EmptyDataDecls
1812 , Opt_KindSignatures
1813 , Opt_GeneralizedNewtypeDeriving
1814 , Opt_TypeFamilies ]
1817 -- Consult the RTS to find whether GHC itself has been built profiled
1818 -- If so, you can't use Template Haskell
1819 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1821 rtsIsProfiled :: Bool
1822 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1824 checkTemplateHaskellOk :: Bool -> DynP ()
1825 checkTemplateHaskellOk turn_on
1826 | turn_on && rtsIsProfiled
1827 = addErr "You can't use Template Haskell with a profiled compiler"
1831 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1832 -- so we simply say "ok". It doesn't matter because TH isn't
1833 -- available in stage 1 anyway.
1834 checkTemplateHaskellOk turn_on = return ()
1837 {- **********************************************************************
1839 DynFlags constructors
1841 %********************************************************************* -}
1843 type DynP = EwM (CmdLineP DynFlags)
1845 upd :: (DynFlags -> DynFlags) -> DynP ()
1846 upd f = liftEwM (do { dfs <- getCmdLineState
1847 ; putCmdLineState $! (f dfs) })
1849 --------------- Constructor functions for OptKind -----------------
1850 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1851 noArg fn = NoArg (upd fn)
1853 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1854 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1856 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1857 hasArg fn = HasArg (upd . fn)
1859 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1860 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1861 ; deprecate deprec })
1863 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1864 intSuffix fn = IntSuffix (\n -> upd (fn n))
1866 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1867 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1869 --------------------------
1870 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1871 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1872 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1874 --------------------------
1875 setLanguage :: Language -> DynP ()
1876 setLanguage l = upd (\dfs -> dfs { language = Just l })
1878 --------------------------
1879 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1880 setExtensionFlag f = do { upd (\dfs -> lopt_set dfs f)
1881 ; mapM_ setExtensionFlag deps }
1883 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1884 -- When you set f, set the ones it implies
1885 -- NB: use setExtensionFlag recursively, in case the implied flags
1886 -- implies further flags
1887 -- When you un-set f, however, we don't un-set the things it implies
1888 -- (except for -fno-glasgow-exts, which is treated specially)
1890 unSetExtensionFlag f = upd (\dfs -> lopt_unset dfs f)
1892 --------------------------
1893 setDumpFlag' :: DynFlag -> DynP ()
1894 setDumpFlag' dump_flag
1895 = do { setDynFlag dump_flag
1896 ; when want_recomp forceRecompile }
1898 -- Certain dumpy-things are really interested in what's going
1899 -- on during recompilation checking, so in those cases we
1900 -- don't want to turn it off.
1901 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1902 Opt_D_dump_hi_diffs]
1904 forceRecompile :: DynP ()
1905 -- Whenver we -ddump, force recompilation (by switching off the
1906 -- recompilation checker), else you don't see the dump! However,
1907 -- don't switch it off in --make mode, else *everything* gets
1908 -- recompiled which probably isn't what you want
1909 forceRecompile = do { dfs <- liftEwM getCmdLineState
1910 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1912 force_recomp dfs = isOneShot (ghcMode dfs)
1914 setVerboseCore2Core :: DynP ()
1915 setVerboseCore2Core = do forceRecompile
1916 setDynFlag Opt_D_verbose_core2core
1917 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1920 setDumpSimplPhases :: String -> DynP ()
1921 setDumpSimplPhases s = do forceRecompile
1922 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1924 spec = case s of { ('=' : s') -> s'; _ -> s }
1926 setVerbosity :: Maybe Int -> DynP ()
1927 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1929 addCmdlineHCInclude :: String -> DynP ()
1930 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1932 extraPkgConf_ :: FilePath -> DynP ()
1933 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1935 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1937 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1939 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1941 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1943 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1945 setPackageName :: String -> DynFlags -> DynFlags
1946 setPackageName p s = s{ thisPackage = stringToPackageId p }
1948 -- If we're linking a binary, then only targets that produce object
1949 -- code are allowed (requests for other target types are ignored).
1950 setTarget :: HscTarget -> DynP ()
1951 setTarget l = upd set
1954 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1957 -- Changes the target only if we're compiling object code. This is
1958 -- used by -fasm and -fvia-C, which switch from one to the other, but
1959 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1960 -- can be safely used in an OPTIONS_GHC pragma.
1961 setObjTarget :: HscTarget -> DynP ()
1962 setObjTarget l = upd set
1965 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1968 setOptLevel :: Int -> DynFlags -> DynFlags
1969 setOptLevel n dflags
1970 | hscTarget dflags == HscInterpreted && n > 0
1972 -- not in IO any more, oh well:
1973 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1975 = updOptLevel n dflags
1978 -- -Odph is equivalent to
1980 -- -O2 optimise as much as possible
1981 -- -fno-method-sharing sharing specialisation defeats fusion
1983 -- -fdicts-cheap always inline dictionaries
1984 -- -fmax-simplifier-iterations20 this is necessary sometimes
1985 -- -fsimplifier-phases=3 we use an additional simplifier phase
1987 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1988 -- -fno-spec-constr-count SpecConstr as much as possible
1989 -- -finline-enough-args hack to prevent excessive inlining
1991 setDPHOpt :: DynFlags -> DynFlags
1992 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1994 , specConstrThreshold = Nothing
1995 , specConstrCount = Nothing
1997 `dopt_set` Opt_DictsCheap
1998 `dopt_unset` Opt_MethodSharing
2000 data DPHBackend = DPHPar
2003 deriving(Eq, Ord, Enum, Show)
2005 setDPHBackend :: DPHBackend -> DynP ()
2006 setDPHBackend backend
2008 upd $ \dflags -> dflags { dphBackend = backend }
2009 mapM_ exposePackage (dph_packages backend)
2011 dph_packages DPHThis = []
2012 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2013 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2015 dphPackage :: DynFlags -> PackageId
2016 dphPackage dflags = case dphBackend dflags of
2017 DPHPar -> dphParPackageId
2018 DPHSeq -> dphSeqPackageId
2019 DPHThis -> thisPackage dflags
2021 setMainIs :: String -> DynP ()
2023 | not (null main_fn) && isLower (head main_fn)
2024 -- The arg looked like "Foo.Bar.baz"
2025 = upd $ \d -> d{ mainFunIs = Just main_fn,
2026 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2028 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2029 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2031 | otherwise -- The arg looked like "baz"
2032 = upd $ \d -> d{ mainFunIs = Just arg }
2034 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2036 -----------------------------------------------------------------------------
2037 -- Paths & Libraries
2039 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2041 -- -i on its own deletes the import paths
2042 addImportPath "" = upd (\s -> s{importPaths = []})
2043 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2047 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2050 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2052 addFrameworkPath p =
2053 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2055 #ifndef mingw32_TARGET_OS
2056 split_marker :: Char
2057 split_marker = ':' -- not configurable (ToDo)
2060 splitPathList :: String -> [String]
2061 splitPathList s = filter notNull (splitUp s)
2062 -- empty paths are ignored: there might be a trailing
2063 -- ':' in the initial list, for example. Empty paths can
2064 -- cause confusion when they are translated into -I options
2065 -- for passing to gcc.
2067 #ifndef mingw32_TARGET_OS
2068 splitUp xs = split split_marker xs
2070 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2072 -- That is, if "foo:bar:baz" is used, this interpreted as
2073 -- consisting of three entries, 'foo', 'bar', 'baz'.
2074 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2075 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2077 -- Notice that no attempt is made to fully replace the 'standard'
2078 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2079 -- that this will cause too much breakage for users & ':' will
2080 -- work fine even with DOS paths, if you're not insisting on being silly.
2083 splitUp (x:':':div:xs) | div `elem` dir_markers
2084 = ((x:':':div:p): splitUp rs)
2086 (p,rs) = findNextPath xs
2087 -- we used to check for existence of the path here, but that
2088 -- required the IO monad to be threaded through the command-line
2089 -- parser which is quite inconvenient. The
2090 splitUp xs = cons p (splitUp rs)
2092 (p,rs) = findNextPath xs
2097 -- will be called either when we've consumed nought or the
2098 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2099 -- finding the next split marker.
2101 case break (`elem` split_markers) xs of
2102 (p, _:ds) -> (p, ds)
2105 split_markers :: [Char]
2106 split_markers = [':', ';']
2108 dir_markers :: [Char]
2109 dir_markers = ['/', '\\']
2112 -- -----------------------------------------------------------------------------
2113 -- tmpDir, where we store temporary files.
2115 setTmpDir :: FilePath -> DynFlags -> DynFlags
2116 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2117 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2118 -- seem necessary now --SDM 7/2/2008
2120 -----------------------------------------------------------------------------
2123 setRtsOpts :: String -> DynP ()
2124 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2126 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2127 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2129 -----------------------------------------------------------------------------
2132 setOptHpcDir :: String -> DynP ()
2133 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2135 -----------------------------------------------------------------------------
2136 -- Via-C compilation stuff
2138 -- There are some options that we need to pass to gcc when compiling
2139 -- Haskell code via C, but are only supported by recent versions of
2140 -- gcc. The configure script decides which of these options we need,
2141 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2142 -- read before each via-C compilation. The advantage of having these
2143 -- in a separate file is that the file can be created at install-time
2144 -- depending on the available gcc version, and even re-generated later
2145 -- if gcc is upgraded.
2147 -- The options below are not dependent on the version of gcc, only the
2150 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2151 [String]) -- for registerised HC compilations
2152 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2153 in (cCcOpts ++ flagsAll, flagsRegHc)
2155 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2156 [String]) -- for registerised HC compilations
2157 machdepCCOpts' _dflags
2158 #if alpha_TARGET_ARCH
2160 #ifdef HAVE_THREADED_RTS_SUPPORT
2164 -- For now, to suppress the gcc warning "call-clobbered
2165 -- register used for global register variable", we simply
2166 -- disable all warnings altogether using the -w flag. Oh well.
2168 #elif hppa_TARGET_ARCH
2169 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2170 -- (very nice, but too bad the HP /usr/include files don't agree.)
2171 = ( ["-D_HPUX_SOURCE"], [] )
2173 #elif m68k_TARGET_ARCH
2174 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2175 -- popping of args to routines to be explicit; if we let things
2176 -- be deferred 'til after an STGJUMP, imminent death is certain!
2178 -- -fomit-frame-pointer : *don't*
2179 -- It's better to have a6 completely tied up being a frame pointer
2180 -- rather than let GCC pick random things to do with it.
2181 -- (If we want to steal a6, then we would try to do things
2182 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2183 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2185 #elif i386_TARGET_ARCH
2186 -- -fno-defer-pop : basically the same game as for m68k
2188 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2189 -- the fp (%ebp) for our register maps.
2190 = let n_regs = stolen_x86_regs _dflags
2193 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2196 "-fomit-frame-pointer",
2197 -- we want -fno-builtin, because when gcc inlines
2198 -- built-in functions like memcpy() it tends to
2199 -- run out of registers, requiring -monly-n-regs
2201 "-DSTOLEN_X86_REGS="++show n_regs ]
2204 #elif ia64_TARGET_ARCH
2205 = ( [], ["-fomit-frame-pointer", "-G0"] )
2207 #elif x86_64_TARGET_ARCH
2210 ["-fomit-frame-pointer",
2211 "-fno-asynchronous-unwind-tables",
2212 -- the unwind tables are unnecessary for HC code,
2213 -- and get in the way of -split-objs. Another option
2214 -- would be to throw them away in the mangler, but this
2217 -- calling builtins like strlen() using the FFI can
2218 -- cause gcc to run out of regs, so use the external
2222 #elif sparc_TARGET_ARCH
2224 -- For now, to suppress the gcc warning "call-clobbered
2225 -- register used for global register variable", we simply
2226 -- disable all warnings altogether using the -w flag. Oh well.
2228 #elif powerpc_apple_darwin_TARGET
2230 -- Disable Apple's precompiling preprocessor. It's a great thing
2231 -- for "normal" programs, but it doesn't support register variable
2233 = ( [], ["-no-cpp-precomp"] )
2238 picCCOpts :: DynFlags -> [String]
2240 #if darwin_TARGET_OS
2241 -- Apple prefers to do things the other way round.
2242 -- PIC is on by default.
2243 -- -mdynamic-no-pic:
2244 -- Turn off PIC code generation.
2246 -- Don't generate "common" symbols - these are unwanted
2247 -- in dynamic libraries.
2250 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2252 = ["-mdynamic-no-pic"]
2253 #elif mingw32_TARGET_OS
2254 -- no -fPIC for Windows
2256 = ["-U __PIC__","-D__PIC__"]
2260 -- we need -fPIC for C files when we are compiling with -dynamic,
2261 -- otherwise things like stub.c files don't get compiled
2262 -- correctly. They need to reference data in the Haskell
2263 -- objects, but can't without -fPIC. See
2264 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2265 | opt_PIC || not opt_Static
2266 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2271 -- -----------------------------------------------------------------------------
2275 can_split = cSplitObjs == "YES"
2277 -- -----------------------------------------------------------------------------
2280 data Printable = String String
2281 | FromDynFlags (DynFlags -> String)
2283 compilerInfo :: [(String, Printable)]
2284 compilerInfo = [("Project name", String cProjectName),
2285 ("Project version", String cProjectVersion),
2286 ("Booter version", String cBooterVersion),
2287 ("Stage", String cStage),
2288 ("Build platform", String cBuildPlatform),
2289 ("Host platform", String cHostPlatform),
2290 ("Target platform", String cTargetPlatform),
2291 ("Have interpreter", String cGhcWithInterpreter),
2292 ("Object splitting", String cSplitObjs),
2293 ("Have native code generator", String cGhcWithNativeCodeGen),
2294 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2295 ("Support SMP", String cGhcWithSMP),
2296 ("Unregisterised", String cGhcUnregisterised),
2297 ("Tables next to code", String cGhcEnableTablesNextToCode),
2298 ("RTS ways", String cGhcRTSWays),
2299 ("Leading underscore", String cLeadingUnderscore),
2300 ("Debug on", String (show debugIsOn)),
2301 ("LibDir", FromDynFlags topDir),
2302 ("Global Package DB", FromDynFlags systemPackageConfig)