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 )
92 import Foreign.C ( CInt )
93 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
95 import System.IO.Unsafe ( unsafePerformIO )
97 import Control.Monad ( when )
101 import Data.Map (Map)
102 import qualified Data.Map as Map
103 import System.FilePath
104 import System.IO ( stderr, hPutChar )
106 -- -----------------------------------------------------------------------------
109 -- | Enumerates the simple on-or-off dynamic flags
115 | Opt_D_dump_cmmz_pretty
119 | Opt_D_dump_asm_native
120 | Opt_D_dump_asm_liveness
121 | Opt_D_dump_asm_coalesce
122 | Opt_D_dump_asm_regalloc
123 | Opt_D_dump_asm_regalloc_stages
124 | Opt_D_dump_asm_conflicts
125 | Opt_D_dump_asm_stats
126 | Opt_D_dump_asm_expanded
133 | Opt_D_dump_inlinings
134 | Opt_D_dump_rule_firings
135 | Opt_D_dump_occur_anal
139 | Opt_D_dump_simpl_iterations
140 | Opt_D_dump_simpl_phases
149 | Opt_D_dump_worker_wrapper
150 | Opt_D_dump_rn_trace
151 | Opt_D_dump_rn_stats
153 | Opt_D_dump_simpl_stats
154 | Opt_D_dump_tc_trace
155 | Opt_D_dump_if_trace
162 | Opt_D_verbose_core2core
163 | Opt_D_verbose_stg2stg
165 | Opt_D_dump_hi_diffs
166 | Opt_D_dump_minimal_imports
167 | Opt_D_dump_mod_cycles
168 | Opt_D_dump_view_pattern_commoning
169 | Opt_D_faststring_stats
170 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
171 | Opt_D_no_debug_output
177 | Opt_WarnIsError -- -Werror; makes warnings fatal
178 | Opt_WarnDuplicateExports
180 | Opt_WarnImplicitPrelude
181 | Opt_WarnIncompletePatterns
182 | Opt_WarnIncompletePatternsRecUpd
183 | Opt_WarnMissingFields
184 | Opt_WarnMissingImportList
185 | Opt_WarnMissingMethods
186 | Opt_WarnMissingSigs
187 | Opt_WarnNameShadowing
188 | Opt_WarnOverlappingPatterns
189 | Opt_WarnSimplePatterns
190 | Opt_WarnTypeDefaults
191 | Opt_WarnMonomorphism
192 | Opt_WarnUnusedBinds
193 | Opt_WarnUnusedImports
194 | Opt_WarnUnusedMatches
195 | Opt_WarnWarningsDeprecations
196 | Opt_WarnDeprecatedFlags
197 | Opt_WarnDodgyExports
198 | Opt_WarnDodgyImports
201 | Opt_WarnUnrecognisedPragmas
202 | Opt_WarnDodgyForeignImports
203 | Opt_WarnLazyUnliftedBindings
204 | Opt_WarnUnusedDoBind
205 | Opt_WarnWrongDoBind
206 | Opt_WarnAlternativeLayoutRuleTransitional
208 | Opt_PrintExplicitForalls
215 | Opt_StaticArgumentTransformation
219 | Opt_DoLambdaEtaExpansion
223 | Opt_UnboxStrictFields
226 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
228 | Opt_RegsGraph -- do graph coloring register allocation
229 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
232 | Opt_IgnoreInterfacePragmas
233 | Opt_OmitInterfacePragmas
234 | Opt_ExposeAllUnfoldings
237 | Opt_AutoSccsOnAllToplevs
238 | Opt_AutoSccsOnExportedToplevs
239 | Opt_AutoSccsOnIndividualCafs
246 | Opt_ExcessPrecision
247 | Opt_EagerBlackHoling
248 | Opt_ReadUserPackageConf
252 | Opt_HideAllPackages
253 | Opt_PrintBindResult
257 | Opt_BreakOnException
259 | Opt_PrintEvldWithShow
260 | Opt_PrintBindContents
263 | Opt_EmitExternalCore
265 | Opt_BuildingCabalPackage
271 | Opt_ConvertToZipCfgAndBack
272 | Opt_AutoLinkPackages
273 | Opt_ImplicitImportQualified
282 | Opt_KeepRawTokenStream
287 data Language = Haskell98 | Haskell2010
291 | Opt_OverlappingInstances
292 | Opt_UndecidableInstances
293 | Opt_IncoherentInstances
294 | Opt_MonomorphismRestriction
297 | Opt_RelaxedPolyRec -- Deprecated
298 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
299 | Opt_ForeignFunctionInterface
300 | Opt_UnliftedFFITypes
301 | Opt_GHCForeignImportPrim
302 | Opt_PArr -- Syntactic support for parallel arrays
303 | Opt_Arrows -- Arrow-notation syntax
304 | Opt_TemplateHaskell
307 | Opt_Generics -- "Derivable type classes"
308 | Opt_ImplicitPrelude
309 | Opt_ScopedTypeVariables
313 | Opt_OverloadedStrings
314 | Opt_DisambiguateRecordFields
315 | Opt_RecordWildCards
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 (Map 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 Map.empty
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,
734 flags = defaultFlags,
736 extensionFlags = Left [],
738 log_action = \severity srcSpan style msg ->
740 SevOutput -> printOutput (msg style)
741 SevInfo -> printErrs (msg style)
742 SevFatal -> printErrs (msg style)
745 printErrs ((mkLocMessage srcSpan msg) style)
746 -- careful (#2302): printErrs prints in UTF-8, whereas
747 -- converting to string first and using hPutStr would
748 -- just emit the low 8 bits of each unicode char.
752 Note [Verbosity levels]
753 ~~~~~~~~~~~~~~~~~~~~~~~
754 0 | print errors & warnings only
755 1 | minimal verbosity: print "compiling M ... done." for each module.
756 2 | equivalent to -dshow-passes
757 3 | equivalent to existing "ghc -v"
758 4 | "ghc -v -ddump-most"
759 5 | "ghc -v -ddump-all"
765 flattenExtensionFlags :: DynFlags -> DynFlags
766 flattenExtensionFlags dflags
767 = case extensionFlags dflags of
770 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
773 panic "Flattening already-flattened extension flags"
775 ensureFlattenedExtensionFlags :: DynFlags -> DynFlags
776 ensureFlattenedExtensionFlags dflags
777 = case extensionFlags dflags of
780 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
785 -- OnOffs accumulate in reverse order, so we use foldr in order to
786 -- process them in the right order
787 flattenExtensionFlags' :: Maybe Language -> [OnOff ExtensionFlag]
789 flattenExtensionFlags' ml = foldr f defaultExtensionFlags
790 where f (On f) flags = f : delete f flags
791 f (Off f) flags = delete f flags
792 defaultExtensionFlags = languageExtensions ml
794 languageExtensions :: Maybe Language -> [ExtensionFlag]
795 languageExtensions Nothing
796 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
797 -- behaviour the default, to see if anyone notices
799 -- In due course I'd like Opt_MonoLocalBinds to be on by default
800 -- SLPJ September 2010
801 : languageExtensions (Just Haskell2010)
802 languageExtensions (Just Haskell98)
803 = [Opt_ImplicitPrelude,
804 Opt_MonomorphismRestriction,
806 Opt_DatatypeContexts]
807 languageExtensions (Just Haskell2010)
808 = [Opt_ImplicitPrelude,
809 Opt_MonomorphismRestriction,
810 Opt_DatatypeContexts,
812 Opt_ForeignFunctionInterface,
817 -- The DOpt class is a temporary workaround, to avoid having to do
818 -- a mass-renaming dopt->lopt at the moment
820 dopt :: a -> DynFlags -> Bool
821 dopt_set :: DynFlags -> a -> DynFlags
822 dopt_unset :: DynFlags -> a -> DynFlags
824 instance DOpt DynFlag where
827 dopt_unset = dopt_unset'
829 instance DOpt ExtensionFlag where
832 dopt_unset = lopt_unset
834 -- | Test whether a 'DynFlag' is set
835 dopt' :: DynFlag -> DynFlags -> Bool
836 dopt' f dflags = f `elem` (flags dflags)
839 dopt_set' :: DynFlags -> DynFlag -> DynFlags
840 dopt_set' dfs f = dfs{ flags = f : flags dfs }
842 -- | Unset a 'DynFlag'
843 dopt_unset' :: DynFlags -> DynFlag -> DynFlags
844 dopt_unset' dfs f = dfs{ flags = filter (/= f) (flags dfs) }
846 -- | Test whether a 'ExtensionFlag' is set
847 lopt :: ExtensionFlag -> DynFlags -> Bool
848 lopt f dflags = case extensionFlags dflags of
849 Left _ -> panic ("Testing for extension flag " ++ show f ++ " before flattening")
850 Right flags -> f `elem` flags
852 -- | Set a 'ExtensionFlag'
853 lopt_set :: DynFlags -> ExtensionFlag -> DynFlags
854 lopt_set dfs f = case extensionFlags dfs of
855 Left onoffs -> dfs { extensionFlags = Left (On f : onoffs) }
856 Right _ -> panic ("Setting extension flag " ++ show f ++ " after flattening")
858 -- | Set a 'ExtensionFlag'
859 lopt_set_flattened :: DynFlags -> ExtensionFlag -> DynFlags
860 lopt_set_flattened dfs f = case extensionFlags dfs of
862 panic ("Setting extension flag " ++ show f ++ " before flattening, but expected flattened")
864 dfs { extensionFlags = Right (f : delete f flags) }
866 -- | Unset a 'ExtensionFlag'
867 lopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
868 lopt_unset dfs f = case extensionFlags dfs of
869 Left onoffs -> dfs { extensionFlags = Left (Off f : onoffs) }
870 Right _ -> panic ("Unsetting extension flag " ++ show f ++ " after flattening")
872 -- | Unset a 'ExtensionFlag'
873 lopt_unset_flattened :: DynFlags -> ExtensionFlag -> DynFlags
874 lopt_unset_flattened dfs f = case extensionFlags dfs of
876 panic ("Unsetting extension flag " ++ show f ++ " before flattening, but expected flattened")
878 dfs { extensionFlags = Right (delete f flags) }
880 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
881 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
882 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
883 -> [a] -- ^ Correctly ordered extracted options
884 getOpts dflags opts = reverse (opts dflags)
885 -- We add to the options from the front, so we need to reverse the list
887 -- | Gets the verbosity flag for the current verbosity level. This is fed to
888 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
889 getVerbFlag :: DynFlags -> String
891 | verbosity dflags >= 3 = "-v"
894 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
895 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
896 setPgmP, addOptl, addOptP,
897 addCmdlineFramework, addHaddockOpts
898 :: String -> DynFlags -> DynFlags
899 setOutputFile, setOutputHi, setDumpPrefixForce
900 :: Maybe String -> DynFlags -> DynFlags
902 setObjectDir f d = d{ objectDir = Just f}
903 setHiDir f d = d{ hiDir = Just f}
904 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
905 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
906 -- \#included from the .hc file when compiling with -fvia-C.
907 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
908 setDylibInstallName f d = d{ dylibInstallName = Just f}
910 setObjectSuf f d = d{ objectSuf = f}
911 setHiSuf f d = d{ hiSuf = f}
912 setHcSuf f d = d{ hcSuf = f}
914 setOutputFile f d = d{ outputFile = f}
915 setOutputHi f d = d{ outputHi = f}
917 parseDynLibLoaderMode f d =
919 ("deploy", "") -> d{ dynLibLoader = Deployable }
920 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
921 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
923 setDumpPrefixForce f d = d { dumpPrefixForce = f}
925 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
926 -- Config.hs should really use Option.
927 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
928 addOptl f d = d{ opt_l = f : opt_l d}
929 addOptP f d = d{ opt_P = f : opt_P d}
932 setDepMakefile :: FilePath -> DynFlags -> DynFlags
933 setDepMakefile f d = d { depMakefile = deOptDep f }
935 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
936 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
938 addDepExcludeMod :: String -> DynFlags -> DynFlags
940 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
942 addDepSuffix :: FilePath -> DynFlags -> DynFlags
943 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
946 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
947 -- we need to strip the "-optdep" off of the arg
948 deOptDep :: String -> String
949 deOptDep x = case stripPrefix "-optdep" x of
953 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
955 addHaddockOpts f d = d{ haddockOptions = Just f}
957 -- -----------------------------------------------------------------------------
958 -- Command-line options
960 -- | When invoking external tools as part of the compilation pipeline, we
961 -- pass these a sequence of options on the command-line. Rather than
962 -- just using a list of Strings, we use a type that allows us to distinguish
963 -- between filepaths and 'other stuff'. The reason for this is that
964 -- this type gives us a handle on transforming filenames, and filenames only,
965 -- to whatever format they're expected to be on a particular platform.
967 = FileOption -- an entry that _contains_ filename(s) / filepaths.
968 String -- a non-filepath prefix that shouldn't be
969 -- transformed (e.g., "/out=")
970 String -- the filepath/filename portion
973 showOpt :: Option -> String
974 showOpt (FileOption pre f) = pre ++ f
975 showOpt (Option s) = s
977 -----------------------------------------------------------------------------
978 -- Setting the optimisation level
980 updOptLevel :: Int -> DynFlags -> DynFlags
981 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
983 = dfs2{ optLevel = final_n }
985 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
986 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
987 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
989 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
990 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
992 -- -----------------------------------------------------------------------------
993 -- StgToDo: abstraction of stg-to-stg passes to run.
996 = StgDoMassageForProfiling -- should be (next to) last
997 -- There's also setStgVarInfo, but its absolute "lastness"
998 -- is so critical that it is hardwired in (no flag).
1001 getStgToDo :: DynFlags -> [StgToDo]
1005 stg_stats = dopt Opt_StgStats dflags
1007 todo1 = if stg_stats then [D_stg_stats] else []
1009 todo2 | WayProf `elem` wayNames dflags
1010 = StgDoMassageForProfiling : todo1
1014 {- **********************************************************************
1018 %********************************************************************* -}
1020 -- -----------------------------------------------------------------------------
1021 -- Parsing the dynamic flags.
1023 -- | Parse dynamic flags from a list of command line arguments. Returns the
1024 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1025 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1026 -- flags or missing arguments).
1027 parseDynamicFlags :: Monad m =>
1028 DynFlags -> [Located String]
1029 -> m (DynFlags, [Located String], [Located String])
1030 -- ^ Updated 'DynFlags', left-over arguments, and
1031 -- list of warnings.
1032 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1034 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1035 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1036 parseDynamicNoPackageFlags :: Monad m =>
1037 DynFlags -> [Located String]
1038 -> m (DynFlags, [Located String], [Located String])
1039 -- ^ Updated 'DynFlags', left-over arguments, and
1040 -- list of warnings.
1041 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1043 parseDynamicFlags_ :: Monad m =>
1044 DynFlags -> [Located String] -> Bool
1045 -> m (DynFlags, [Located String], [Located String])
1046 parseDynamicFlags_ dflags0 args pkg_flags = do
1047 -- XXX Legacy support code
1048 -- We used to accept things like
1049 -- optdep-f -optdepdepend
1050 -- optdep-f -optdep depend
1051 -- optdep -f -optdepdepend
1052 -- optdep -f -optdep depend
1053 -- but the spaces trip up proper argument handling. So get rid of them.
1054 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1055 f (x : xs) = x : f xs
1059 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1060 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1061 | otherwise = dynamic_flags
1063 let ((leftover, errs, warns), dflags1)
1064 = runCmdLine (processArgs flag_spec args') dflags0
1065 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1067 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1068 -- isn't up to the job. We know that if hscTarget == HscC, then the
1069 -- user has explicitly used -fvia-C, because -fasm is the default,
1070 -- unless there is no NCG on this platform. The latter case is
1071 -- checked when the -fPIC flag is parsed.
1073 let (pic_warns, dflags2)
1074 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1075 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1076 dflags1{ hscTarget = HscAsm })
1077 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1078 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1079 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1080 ++ "dynamic on this platform;\n ignoring -fllvm"],
1081 dflags1{ hscTarget = HscAsm })
1083 | otherwise = ([], dflags1)
1085 return (dflags2, leftover, pic_warns ++ warns)
1088 {- **********************************************************************
1090 DynFlags specifications
1092 %********************************************************************* -}
1094 allFlags :: [String]
1095 allFlags = map ('-':) $
1096 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1097 map ("fno-"++) flags ++
1098 map ("f"++) flags ++
1099 map ("f"++) flags' ++
1100 map ("X"++) supportedExtensions
1101 where ok (PrefixPred _ _) = False
1103 flags = [ name | (name, _, _) <- fFlags ]
1104 flags' = [ name | (name, _, _) <- fLangFlags ]
1106 --------------- The main flags themselves ------------------
1107 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1109 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1110 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1111 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1113 (HasArg (\s -> do { addCmdlineHCInclude s
1114 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1115 , Flag "v" (OptIntSuffix setVerbosity)
1117 ------- Specific phases --------------------------------------------
1118 -- need to appear before -pgmL to be parsed as LLVM flags.
1119 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1120 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1121 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1122 , Flag "pgmP" (hasArg setPgmP)
1123 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1124 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1125 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1126 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1127 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1128 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1129 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1130 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1132 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1133 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1134 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1135 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1136 , Flag "optP" (hasArg addOptP)
1137 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1138 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1139 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1140 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1141 , Flag "optl" (hasArg addOptl)
1142 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1145 (NoArg (if can_split
1146 then setDynFlag Opt_SplitObjs
1147 else addWarn "ignoring -fsplit-objs"))
1149 -------- ghc -M -----------------------------------------------------
1150 , Flag "dep-suffix" (hasArg addDepSuffix)
1151 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1152 , Flag "dep-makefile" (hasArg setDepMakefile)
1153 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1154 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1155 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1156 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1157 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1158 , Flag "exclude-module" (hasArg addDepExcludeMod)
1159 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1160 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1162 -------- Linking ----------------------------------------------------
1163 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1164 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1165 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1166 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1168 ------- Libraries ---------------------------------------------------
1169 , Flag "L" (Prefix addLibraryPath)
1170 , Flag "l" (AnySuffix (upd . addOptl))
1172 ------- Frameworks --------------------------------------------------
1173 -- -framework-path should really be -F ...
1174 , Flag "framework-path" (HasArg addFrameworkPath)
1175 , Flag "framework" (hasArg addCmdlineFramework)
1177 ------- Output Redirection ------------------------------------------
1178 , Flag "odir" (hasArg setObjectDir)
1179 , Flag "o" (SepArg (upd . setOutputFile . Just))
1180 , Flag "ohi" (hasArg (setOutputHi . Just ))
1181 , Flag "osuf" (hasArg setObjectSuf)
1182 , Flag "hcsuf" (hasArg setHcSuf)
1183 , Flag "hisuf" (hasArg setHiSuf)
1184 , Flag "hidir" (hasArg setHiDir)
1185 , Flag "tmpdir" (hasArg setTmpDir)
1186 , Flag "stubdir" (hasArg setStubDir)
1187 , Flag "outputdir" (hasArg setOutputDir)
1188 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1190 ------- Keeping temporary files -------------------------------------
1191 -- These can be singular (think ghc -c) or plural (think ghc --make)
1192 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1193 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1194 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1195 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1196 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1197 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1198 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1199 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1200 -- This only makes sense as plural
1201 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1203 ------- Miscellaneous ----------------------------------------------
1204 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1205 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1206 , Flag "with-rtsopts" (HasArg setRtsOpts)
1207 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1208 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1209 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1210 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1211 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1212 , Flag "main-is" (SepArg setMainIs)
1213 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1214 , Flag "haddock-opts" (hasArg addHaddockOpts)
1215 , Flag "hpcdir" (SepArg setOptHpcDir)
1217 ------- recompilation checker --------------------------------------
1218 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1219 ; deprecate "Use -fno-force-recomp instead" }))
1220 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1221 ; deprecate "Use -fforce-recomp instead" }))
1223 ------ HsCpp opts ---------------------------------------------------
1224 , Flag "D" (AnySuffix (upd . addOptP))
1225 , Flag "U" (AnySuffix (upd . addOptP))
1227 ------- Include/Import Paths ----------------------------------------
1228 , Flag "I" (Prefix addIncludePath)
1229 , Flag "i" (OptPrefix addImportPath)
1231 ------ Debugging ----------------------------------------------------
1232 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1234 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1235 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1236 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1237 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1238 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1239 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1240 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1241 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1242 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1243 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1244 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1245 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1246 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1247 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1248 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1249 ; setDumpFlag' Opt_D_dump_llvm}))
1250 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1251 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1252 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1253 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1254 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1255 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1256 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1257 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1258 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1259 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1260 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1261 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1262 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1263 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1264 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1265 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1266 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1267 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1268 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1269 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1270 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1271 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1272 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1273 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1274 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1275 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1276 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1277 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1278 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1279 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1280 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1281 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1282 ; setVerboseCore2Core }))
1283 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1284 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1285 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1286 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1287 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1288 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1289 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1290 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1291 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1292 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1293 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1294 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1295 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1296 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1297 , Flag "dshow-passes" (NoArg (do forceRecompile
1298 setVerbosity (Just 2)))
1299 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1301 ------ Machine dependant (-m<blah>) stuff ---------------------------
1303 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1304 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1305 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1306 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1308 ------ Warning opts -------------------------------------------------
1309 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1310 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1311 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1312 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1313 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1314 ; deprecate "Use -w instead" }))
1315 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1317 ------ Optimisation flags ------------------------------------------
1318 , Flag "O" (noArg (setOptLevel 1))
1319 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1320 , Flag "Odph" (noArg setDPHOpt)
1321 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1322 -- If the number is missing, use 1
1324 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1325 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1326 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1327 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1328 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1329 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1330 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1331 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1332 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1333 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1334 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1336 ------ Profiling ----------------------------------------------------
1338 -- XXX Should the -f* flags be deprecated?
1339 -- They don't seem to be documented
1340 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1341 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1342 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1343 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1344 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1345 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1346 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1347 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1348 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1350 ------ DPH flags ----------------------------------------------------
1352 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1353 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1354 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1356 ------ Compiler flags -----------------------------------------------
1358 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1359 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1360 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1361 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1362 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1363 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1365 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1366 setTarget HscNothing))
1367 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1368 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1369 , Flag "fglasgow-exts" (NoArg enableGlasgowExts)
1370 , Flag "fno-glasgow-exts" (NoArg disableGlasgowExts)
1372 ++ map (mkFlag True "f" setDynFlag ) fFlags
1373 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1374 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1375 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1376 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1377 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1378 ++ map (mkFlag True "X" setLanguage) languageFlags
1380 package_flags :: [Flag (CmdLineP DynFlags)]
1382 ------- Packages ----------------------------------------------------
1383 Flag "package-conf" (HasArg extraPkgConf_)
1384 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1385 , Flag "package-name" (hasArg setPackageName)
1386 , Flag "package-id" (HasArg exposePackageId)
1387 , Flag "package" (HasArg exposePackage)
1388 , Flag "hide-package" (HasArg hidePackage)
1389 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1390 , Flag "ignore-package" (HasArg ignorePackage)
1391 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1392 ; deprecate "Use -package instead" }))
1396 = ( String -- Flag in string form
1397 , flag -- Flag in internal form
1398 , Bool -> DynP ()) -- Extra action to run when the flag is found
1399 -- Typically, emit a warning or error
1400 -- True <=> we are turning the flag on
1401 -- False <=> we are turning the flag off
1404 mkFlag :: Bool -- ^ True <=> it should be turned on
1405 -> String -- ^ The flag prefix
1406 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1407 -> FlagSpec flag -- ^ Specification of this particular flag
1408 -> Flag (CmdLineP DynFlags)
1409 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1410 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1412 deprecatedForExtension :: String -> Bool -> DynP ()
1413 deprecatedForExtension lang turn_on
1414 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1416 flag | turn_on = lang
1417 | otherwise = "No"++lang
1419 useInstead :: String -> Bool -> DynP ()
1420 useInstead flag turn_on
1421 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1423 no = if turn_on then "" else "no-"
1425 nop :: Bool -> DynP ()
1428 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1429 fFlags :: [FlagSpec DynFlag]
1431 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1432 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1433 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1434 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1435 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1436 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1437 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1438 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1439 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1440 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1441 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1442 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1443 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1444 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1445 ( "warn-simple-patterns", Opt_WarnSimplePatterns, nop ),
1446 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1447 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1448 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1449 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1450 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1451 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1452 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1453 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1454 ( "warn-orphans", Opt_WarnOrphans, nop ),
1455 ( "warn-tabs", Opt_WarnTabs, nop ),
1456 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1457 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1458 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1459 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1460 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1461 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1462 ( "strictness", Opt_Strictness, nop ),
1463 ( "specialise", Opt_Specialise, nop ),
1464 ( "float-in", Opt_FloatIn, nop ),
1465 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1466 ( "full-laziness", Opt_FullLaziness, nop ),
1467 ( "liberate-case", Opt_LiberateCase, nop ),
1468 ( "spec-constr", Opt_SpecConstr, nop ),
1469 ( "cse", Opt_CSE, nop ),
1470 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1471 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1472 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1473 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1474 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1475 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1476 ( "case-merge", Opt_CaseMerge, nop ),
1477 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1478 ( "method-sharing", Opt_MethodSharing, nop ),
1479 ( "dicts-cheap", Opt_DictsCheap, nop ),
1480 ( "excess-precision", Opt_ExcessPrecision, nop ),
1481 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1482 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1483 ( "print-bind-result", Opt_PrintBindResult, nop ),
1484 ( "force-recomp", Opt_ForceRecomp, nop ),
1485 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1486 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1487 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1488 ( "break-on-exception", Opt_BreakOnException, nop ),
1489 ( "break-on-error", Opt_BreakOnError, nop ),
1490 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1491 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1492 ( "run-cps", Opt_RunCPS, nop ),
1493 ( "run-cpsz", Opt_RunCPSZ, nop ),
1494 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1495 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1496 ( "vectorise", Opt_Vectorise, nop ),
1497 ( "regs-graph", Opt_RegsGraph, nop ),
1498 ( "regs-iterative", Opt_RegsIterative, nop ),
1499 ( "gen-manifest", Opt_GenManifest, nop ),
1500 ( "embed-manifest", Opt_EmbedManifest, nop ),
1501 ( "ext-core", Opt_EmitExternalCore, nop ),
1502 ( "shared-implib", Opt_SharedImplib, nop ),
1503 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1504 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1507 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1508 fLangFlags :: [FlagSpec ExtensionFlag]
1510 ( "th", Opt_TemplateHaskell,
1511 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1512 ( "fi", Opt_ForeignFunctionInterface,
1513 deprecatedForExtension "ForeignFunctionInterface" ),
1514 ( "ffi", Opt_ForeignFunctionInterface,
1515 deprecatedForExtension "ForeignFunctionInterface" ),
1516 ( "arrows", Opt_Arrows,
1517 deprecatedForExtension "Arrows" ),
1518 ( "generics", Opt_Generics,
1519 deprecatedForExtension "Generics" ),
1520 ( "implicit-prelude", Opt_ImplicitPrelude,
1521 deprecatedForExtension "ImplicitPrelude" ),
1522 ( "bang-patterns", Opt_BangPatterns,
1523 deprecatedForExtension "BangPatterns" ),
1524 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1525 deprecatedForExtension "MonomorphismRestriction" ),
1526 ( "mono-pat-binds", Opt_MonoPatBinds,
1527 deprecatedForExtension "MonoPatBinds" ),
1528 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1529 deprecatedForExtension "ExtendedDefaultRules" ),
1530 ( "implicit-params", Opt_ImplicitParams,
1531 deprecatedForExtension "ImplicitParams" ),
1532 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1533 deprecatedForExtension "ScopedTypeVariables" ),
1535 deprecatedForExtension "PArr" ),
1536 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1537 deprecatedForExtension "OverlappingInstances" ),
1538 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1539 deprecatedForExtension "UndecidableInstances" ),
1540 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1541 deprecatedForExtension "IncoherentInstances" )
1544 supportedLanguages :: [String]
1545 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1547 supportedExtensions :: [String]
1548 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1550 supportedLanguagesAndExtensions :: [String]
1551 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1553 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1554 languageFlags :: [FlagSpec Language]
1556 ( "Haskell98", Haskell98, nop ),
1557 ( "Haskell2010", Haskell2010, nop )
1560 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1561 xFlags :: [FlagSpec ExtensionFlag]
1563 ( "CPP", Opt_Cpp, nop ),
1564 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1565 ( "TupleSections", Opt_TupleSections, nop ),
1566 ( "PatternGuards", Opt_PatternGuards, nop ),
1567 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1568 ( "MagicHash", Opt_MagicHash, nop ),
1569 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1570 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1571 ( "KindSignatures", Opt_KindSignatures, nop ),
1572 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1573 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1574 ( "TransformListComp", Opt_TransformListComp, nop ),
1575 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1576 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1577 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1578 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1579 ( "Rank2Types", Opt_Rank2Types, nop ),
1580 ( "RankNTypes", Opt_RankNTypes, nop ),
1581 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1582 \_ -> deprecate "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1583 ( "TypeOperators", Opt_TypeOperators, nop ),
1584 ( "RecursiveDo", Opt_RecursiveDo,
1585 deprecatedForExtension "DoRec"),
1586 ( "DoRec", Opt_DoRec, nop ),
1587 ( "Arrows", Opt_Arrows, nop ),
1588 ( "PArr", Opt_PArr, nop ),
1589 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1590 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1591 ( "Generics", Opt_Generics, nop ),
1592 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1593 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1594 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1595 ( "RecordPuns", Opt_RecordPuns,
1596 deprecatedForExtension "NamedFieldPuns" ),
1597 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1598 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1599 ( "GADTs", Opt_GADTs, nop ),
1600 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1601 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1602 ( "BangPatterns", Opt_BangPatterns, nop ),
1603 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1604 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1605 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1606 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1607 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1608 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1609 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1610 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1611 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1612 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1613 \ turn_on -> if not turn_on
1614 then deprecate "You can't turn off RelaxedPolyRec any more"
1616 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1617 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1618 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1620 ( "PatternSignatures", Opt_ScopedTypeVariables,
1621 deprecatedForExtension "ScopedTypeVariables" ),
1623 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1624 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1625 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1626 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1627 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1628 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1629 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1630 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1631 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1632 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1633 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1634 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1635 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1636 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1637 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1638 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1639 ( "PackageImports", Opt_PackageImports, nop ),
1640 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1641 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1644 defaultFlags :: [DynFlag]
1646 = [ Opt_AutoLinkPackages,
1647 Opt_ReadUserPackageConf,
1657 Opt_PrintBindContents
1660 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1661 -- The default -O0 options
1665 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1667 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1668 , (Opt_Rank2Types, Opt_ExplicitForAll)
1669 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1670 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1671 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1672 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1674 , (Opt_GADTs, Opt_MonoLocalBinds)
1675 , (Opt_TypeFamilies, Opt_MonoLocalBinds)
1676 , (Opt_FunctionalDependencies, Opt_MonoLocalBinds)
1678 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1679 -- all over the place
1681 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1683 -- Record wild-cards implies field disambiguation
1684 -- Otherwise if you write (C {..}) you may well get
1685 -- stuff like " 'a' not in scope ", which is a bit silly
1686 -- if the compiler has just filled in field 'a' of constructor 'C'
1687 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1690 optLevelFlags :: [([Int], DynFlag)]
1692 = [ ([0], Opt_IgnoreInterfacePragmas)
1693 , ([0], Opt_OmitInterfacePragmas)
1695 , ([1,2], Opt_IgnoreAsserts)
1696 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1698 , ([1,2], Opt_DoEtaReduction)
1699 , ([1,2], Opt_CaseMerge)
1700 , ([1,2], Opt_Strictness)
1702 , ([1,2], Opt_FullLaziness)
1703 , ([1,2], Opt_Specialise)
1704 , ([1,2], Opt_FloatIn)
1706 , ([2], Opt_LiberateCase)
1707 , ([2], Opt_SpecConstr)
1708 , ([2], Opt_RegsGraph)
1710 -- , ([2], Opt_StaticArgumentTransformation)
1711 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1712 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1713 -- several improvements to the heuristics, and I'm concerned that without
1714 -- those changes SAT will interfere with some attempts to write "high
1715 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1716 -- this year. In particular, the version in HEAD lacks the tail call
1717 -- criterion, so many things that look like reasonable loops will be
1718 -- turned into functions with extra (unneccesary) thunk creation.
1720 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1721 -- This one is important for a tiresome reason:
1722 -- we want to make sure that the bindings for data
1723 -- constructors are eta-expanded. This is probably
1724 -- a good thing anyway, but it seems fragile.
1727 -- -----------------------------------------------------------------------------
1728 -- Standard sets of warning options
1730 standardWarnings :: [DynFlag]
1732 = [ Opt_WarnWarningsDeprecations,
1733 Opt_WarnDeprecatedFlags,
1734 Opt_WarnUnrecognisedPragmas,
1735 Opt_WarnOverlappingPatterns,
1736 Opt_WarnMissingFields,
1737 Opt_WarnMissingMethods,
1738 Opt_WarnDuplicateExports,
1739 Opt_WarnLazyUnliftedBindings,
1740 Opt_WarnDodgyForeignImports,
1741 Opt_WarnWrongDoBind,
1742 Opt_WarnAlternativeLayoutRuleTransitional
1745 minusWOpts :: [DynFlag]
1747 = standardWarnings ++
1748 [ Opt_WarnUnusedBinds,
1749 Opt_WarnUnusedMatches,
1750 Opt_WarnUnusedImports,
1751 Opt_WarnIncompletePatterns,
1752 Opt_WarnDodgyExports,
1753 Opt_WarnDodgyImports
1756 minusWallOpts :: [DynFlag]
1759 [ Opt_WarnTypeDefaults,
1760 Opt_WarnNameShadowing,
1761 Opt_WarnMissingSigs,
1764 Opt_WarnUnusedDoBind
1767 -- minuswRemovesOpts should be every warning option
1768 minuswRemovesOpts :: [DynFlag]
1771 [Opt_WarnImplicitPrelude,
1772 Opt_WarnIncompletePatternsRecUpd,
1773 Opt_WarnSimplePatterns,
1774 Opt_WarnMonomorphism,
1775 Opt_WarnUnrecognisedPragmas,
1779 enableGlasgowExts :: DynP ()
1780 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1781 mapM_ setExtensionFlag glasgowExtsFlags
1783 disableGlasgowExts :: DynP ()
1784 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1785 mapM_ unSetExtensionFlag glasgowExtsFlags
1787 glasgowExtsFlags :: [ExtensionFlag]
1788 glasgowExtsFlags = [
1789 Opt_ForeignFunctionInterface
1790 , Opt_UnliftedFFITypes
1792 , Opt_ImplicitParams
1793 , Opt_ScopedTypeVariables
1795 , Opt_TypeSynonymInstances
1796 , Opt_StandaloneDeriving
1797 , Opt_DeriveDataTypeable
1799 , Opt_DeriveFoldable
1800 , Opt_DeriveTraversable
1801 , Opt_FlexibleContexts
1802 , Opt_FlexibleInstances
1803 , Opt_ConstrainedClassMethods
1804 , Opt_MultiParamTypeClasses
1805 , Opt_FunctionalDependencies
1807 , Opt_PolymorphicComponents
1808 , Opt_ExistentialQuantification
1810 , Opt_PostfixOperators
1812 , Opt_LiberalTypeSynonyms
1816 , Opt_ParallelListComp
1817 , Opt_EmptyDataDecls
1818 , Opt_KindSignatures
1819 , Opt_GeneralizedNewtypeDeriving
1820 , Opt_TypeFamilies ]
1823 -- Consult the RTS to find whether GHC itself has been built profiled
1824 -- If so, you can't use Template Haskell
1825 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1827 rtsIsProfiled :: Bool
1828 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1830 checkTemplateHaskellOk :: Bool -> DynP ()
1831 checkTemplateHaskellOk turn_on
1832 | turn_on && rtsIsProfiled
1833 = addErr "You can't use Template Haskell with a profiled compiler"
1837 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1838 -- so we simply say "ok". It doesn't matter because TH isn't
1839 -- available in stage 1 anyway.
1840 checkTemplateHaskellOk turn_on = return ()
1843 {- **********************************************************************
1845 DynFlags constructors
1847 %********************************************************************* -}
1849 type DynP = EwM (CmdLineP DynFlags)
1851 upd :: (DynFlags -> DynFlags) -> DynP ()
1852 upd f = liftEwM (do { dfs <- getCmdLineState
1853 ; putCmdLineState $! (f dfs) })
1855 --------------- Constructor functions for OptKind -----------------
1856 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1857 noArg fn = NoArg (upd fn)
1859 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1860 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1862 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1863 hasArg fn = HasArg (upd . fn)
1865 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1866 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1867 ; deprecate deprec })
1869 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1870 intSuffix fn = IntSuffix (\n -> upd (fn n))
1872 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1873 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1875 --------------------------
1876 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1877 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1878 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1880 --------------------------
1881 setLanguage :: Language -> DynP ()
1882 setLanguage l = upd (\dfs -> dfs { language = Just l })
1884 --------------------------
1885 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1886 setExtensionFlag f = do { upd (\dfs -> lopt_set dfs f)
1887 ; mapM_ setExtensionFlag deps }
1889 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1890 -- When you set f, set the ones it implies
1891 -- NB: use setExtensionFlag recursively, in case the implied flags
1892 -- implies further flags
1893 -- When you un-set f, however, we don't un-set the things it implies
1894 -- (except for -fno-glasgow-exts, which is treated specially)
1896 unSetExtensionFlag f = upd (\dfs -> lopt_unset dfs f)
1898 --------------------------
1899 setDumpFlag' :: DynFlag -> DynP ()
1900 setDumpFlag' dump_flag
1901 = do { setDynFlag dump_flag
1902 ; when want_recomp forceRecompile }
1904 -- Certain dumpy-things are really interested in what's going
1905 -- on during recompilation checking, so in those cases we
1906 -- don't want to turn it off.
1907 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1908 Opt_D_dump_hi_diffs]
1910 forceRecompile :: DynP ()
1911 -- Whenver we -ddump, force recompilation (by switching off the
1912 -- recompilation checker), else you don't see the dump! However,
1913 -- don't switch it off in --make mode, else *everything* gets
1914 -- recompiled which probably isn't what you want
1915 forceRecompile = do { dfs <- liftEwM getCmdLineState
1916 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1918 force_recomp dfs = isOneShot (ghcMode dfs)
1920 setVerboseCore2Core :: DynP ()
1921 setVerboseCore2Core = do forceRecompile
1922 setDynFlag Opt_D_verbose_core2core
1923 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1926 setDumpSimplPhases :: String -> DynP ()
1927 setDumpSimplPhases s = do forceRecompile
1928 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1930 spec = case s of { ('=' : s') -> s'; _ -> s }
1932 setVerbosity :: Maybe Int -> DynP ()
1933 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1935 addCmdlineHCInclude :: String -> DynP ()
1936 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1938 extraPkgConf_ :: FilePath -> DynP ()
1939 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1941 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1943 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1945 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1947 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1949 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1951 setPackageName :: String -> DynFlags -> DynFlags
1952 setPackageName p s = s{ thisPackage = stringToPackageId p }
1954 -- If we're linking a binary, then only targets that produce object
1955 -- code are allowed (requests for other target types are ignored).
1956 setTarget :: HscTarget -> DynP ()
1957 setTarget l = upd set
1960 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1963 -- Changes the target only if we're compiling object code. This is
1964 -- used by -fasm and -fvia-C, which switch from one to the other, but
1965 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1966 -- can be safely used in an OPTIONS_GHC pragma.
1967 setObjTarget :: HscTarget -> DynP ()
1968 setObjTarget l = upd set
1971 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1974 setOptLevel :: Int -> DynFlags -> DynFlags
1975 setOptLevel n dflags
1976 | hscTarget dflags == HscInterpreted && n > 0
1978 -- not in IO any more, oh well:
1979 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1981 = updOptLevel n dflags
1984 -- -Odph is equivalent to
1986 -- -O2 optimise as much as possible
1987 -- -fno-method-sharing sharing specialisation defeats fusion
1989 -- -fdicts-cheap always inline dictionaries
1990 -- -fmax-simplifier-iterations20 this is necessary sometimes
1991 -- -fsimplifier-phases=3 we use an additional simplifier phase
1993 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1994 -- -fno-spec-constr-count SpecConstr as much as possible
1995 -- -finline-enough-args hack to prevent excessive inlining
1997 setDPHOpt :: DynFlags -> DynFlags
1998 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2000 , specConstrThreshold = Nothing
2001 , specConstrCount = Nothing
2003 `dopt_set` Opt_DictsCheap
2004 `dopt_unset` Opt_MethodSharing
2006 data DPHBackend = DPHPar
2009 deriving(Eq, Ord, Enum, Show)
2011 setDPHBackend :: DPHBackend -> DynP ()
2012 setDPHBackend backend
2014 upd $ \dflags -> dflags { dphBackend = backend }
2015 mapM_ exposePackage (dph_packages backend)
2017 dph_packages DPHThis = []
2018 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2019 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2021 dphPackage :: DynFlags -> PackageId
2022 dphPackage dflags = case dphBackend dflags of
2023 DPHPar -> dphParPackageId
2024 DPHSeq -> dphSeqPackageId
2025 DPHThis -> thisPackage dflags
2027 setMainIs :: String -> DynP ()
2029 | not (null main_fn) && isLower (head main_fn)
2030 -- The arg looked like "Foo.Bar.baz"
2031 = upd $ \d -> d{ mainFunIs = Just main_fn,
2032 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2034 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2035 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2037 | otherwise -- The arg looked like "baz"
2038 = upd $ \d -> d{ mainFunIs = Just arg }
2040 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2042 -----------------------------------------------------------------------------
2043 -- Paths & Libraries
2045 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2047 -- -i on its own deletes the import paths
2048 addImportPath "" = upd (\s -> s{importPaths = []})
2049 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2053 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2056 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2058 addFrameworkPath p =
2059 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2061 #ifndef mingw32_TARGET_OS
2062 split_marker :: Char
2063 split_marker = ':' -- not configurable (ToDo)
2066 splitPathList :: String -> [String]
2067 splitPathList s = filter notNull (splitUp s)
2068 -- empty paths are ignored: there might be a trailing
2069 -- ':' in the initial list, for example. Empty paths can
2070 -- cause confusion when they are translated into -I options
2071 -- for passing to gcc.
2073 #ifndef mingw32_TARGET_OS
2074 splitUp xs = split split_marker xs
2076 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2078 -- That is, if "foo:bar:baz" is used, this interpreted as
2079 -- consisting of three entries, 'foo', 'bar', 'baz'.
2080 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2081 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2083 -- Notice that no attempt is made to fully replace the 'standard'
2084 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2085 -- that this will cause too much breakage for users & ':' will
2086 -- work fine even with DOS paths, if you're not insisting on being silly.
2089 splitUp (x:':':div:xs) | div `elem` dir_markers
2090 = ((x:':':div:p): splitUp rs)
2092 (p,rs) = findNextPath xs
2093 -- we used to check for existence of the path here, but that
2094 -- required the IO monad to be threaded through the command-line
2095 -- parser which is quite inconvenient. The
2096 splitUp xs = cons p (splitUp rs)
2098 (p,rs) = findNextPath xs
2103 -- will be called either when we've consumed nought or the
2104 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2105 -- finding the next split marker.
2107 case break (`elem` split_markers) xs of
2108 (p, _:ds) -> (p, ds)
2111 split_markers :: [Char]
2112 split_markers = [':', ';']
2114 dir_markers :: [Char]
2115 dir_markers = ['/', '\\']
2118 -- -----------------------------------------------------------------------------
2119 -- tmpDir, where we store temporary files.
2121 setTmpDir :: FilePath -> DynFlags -> DynFlags
2122 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2123 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2124 -- seem necessary now --SDM 7/2/2008
2126 -----------------------------------------------------------------------------
2129 setRtsOpts :: String -> DynP ()
2130 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2132 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2133 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2135 -----------------------------------------------------------------------------
2138 setOptHpcDir :: String -> DynP ()
2139 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2141 -----------------------------------------------------------------------------
2142 -- Via-C compilation stuff
2144 -- There are some options that we need to pass to gcc when compiling
2145 -- Haskell code via C, but are only supported by recent versions of
2146 -- gcc. The configure script decides which of these options we need,
2147 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2148 -- read before each via-C compilation. The advantage of having these
2149 -- in a separate file is that the file can be created at install-time
2150 -- depending on the available gcc version, and even re-generated later
2151 -- if gcc is upgraded.
2153 -- The options below are not dependent on the version of gcc, only the
2156 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2157 [String]) -- for registerised HC compilations
2158 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2159 in (cCcOpts ++ flagsAll, flagsRegHc)
2161 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2162 [String]) -- for registerised HC compilations
2163 machdepCCOpts' _dflags
2164 #if alpha_TARGET_ARCH
2166 #ifdef HAVE_THREADED_RTS_SUPPORT
2170 -- For now, to suppress the gcc warning "call-clobbered
2171 -- register used for global register variable", we simply
2172 -- disable all warnings altogether using the -w flag. Oh well.
2174 #elif hppa_TARGET_ARCH
2175 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2176 -- (very nice, but too bad the HP /usr/include files don't agree.)
2177 = ( ["-D_HPUX_SOURCE"], [] )
2179 #elif m68k_TARGET_ARCH
2180 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2181 -- popping of args to routines to be explicit; if we let things
2182 -- be deferred 'til after an STGJUMP, imminent death is certain!
2184 -- -fomit-frame-pointer : *don't*
2185 -- It's better to have a6 completely tied up being a frame pointer
2186 -- rather than let GCC pick random things to do with it.
2187 -- (If we want to steal a6, then we would try to do things
2188 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2189 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2191 #elif i386_TARGET_ARCH
2192 -- -fno-defer-pop : basically the same game as for m68k
2194 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2195 -- the fp (%ebp) for our register maps.
2196 = let n_regs = stolen_x86_regs _dflags
2199 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2202 "-fomit-frame-pointer",
2203 -- we want -fno-builtin, because when gcc inlines
2204 -- built-in functions like memcpy() it tends to
2205 -- run out of registers, requiring -monly-n-regs
2207 "-DSTOLEN_X86_REGS="++show n_regs ]
2210 #elif ia64_TARGET_ARCH
2211 = ( [], ["-fomit-frame-pointer", "-G0"] )
2213 #elif x86_64_TARGET_ARCH
2216 ["-fomit-frame-pointer",
2217 "-fno-asynchronous-unwind-tables",
2218 -- the unwind tables are unnecessary for HC code,
2219 -- and get in the way of -split-objs. Another option
2220 -- would be to throw them away in the mangler, but this
2223 -- calling builtins like strlen() using the FFI can
2224 -- cause gcc to run out of regs, so use the external
2228 #elif sparc_TARGET_ARCH
2230 -- For now, to suppress the gcc warning "call-clobbered
2231 -- register used for global register variable", we simply
2232 -- disable all warnings altogether using the -w flag. Oh well.
2234 #elif powerpc_apple_darwin_TARGET
2236 -- Disable Apple's precompiling preprocessor. It's a great thing
2237 -- for "normal" programs, but it doesn't support register variable
2239 = ( [], ["-no-cpp-precomp"] )
2244 picCCOpts :: DynFlags -> [String]
2246 #if darwin_TARGET_OS
2247 -- Apple prefers to do things the other way round.
2248 -- PIC is on by default.
2249 -- -mdynamic-no-pic:
2250 -- Turn off PIC code generation.
2252 -- Don't generate "common" symbols - these are unwanted
2253 -- in dynamic libraries.
2256 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2258 = ["-mdynamic-no-pic"]
2259 #elif mingw32_TARGET_OS
2260 -- no -fPIC for Windows
2262 = ["-U __PIC__","-D__PIC__"]
2266 -- we need -fPIC for C files when we are compiling with -dynamic,
2267 -- otherwise things like stub.c files don't get compiled
2268 -- correctly. They need to reference data in the Haskell
2269 -- objects, but can't without -fPIC. See
2270 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2271 | opt_PIC || not opt_Static
2272 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2277 -- -----------------------------------------------------------------------------
2281 can_split = cSplitObjs == "YES"
2283 -- -----------------------------------------------------------------------------
2286 data Printable = String String
2287 | FromDynFlags (DynFlags -> String)
2289 compilerInfo :: [(String, Printable)]
2290 compilerInfo = [("Project name", String cProjectName),
2291 ("Project version", String cProjectVersion),
2292 ("Booter version", String cBooterVersion),
2293 ("Stage", String cStage),
2294 ("Build platform", String cBuildPlatform),
2295 ("Host platform", String cHostPlatform),
2296 ("Target platform", String cTargetPlatform),
2297 ("Have interpreter", String cGhcWithInterpreter),
2298 ("Object splitting", String cSplitObjs),
2299 ("Have native code generator", String cGhcWithNativeCodeGen),
2300 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2301 ("Support SMP", String cGhcWithSMP),
2302 ("Unregisterised", String cGhcUnregisterised),
2303 ("Tables next to code", String cGhcEnableTablesNextToCode),
2304 ("RTS ways", String cGhcRTSWays),
2305 ("Leading underscore", String cLeadingUnderscore),
2306 ("Debug on", String (show debugIsOn)),
2307 ("LibDir", FromDynFlags topDir),
2308 ("Global Package DB", FromDynFlags systemPackageConfig)