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
28 HscTarget(..), isObjectTarget, defaultObjectTarget,
29 GhcMode(..), isOneShot,
30 GhcLink(..), isNoLink,
34 fFlags, fLangFlags, xFlags,
38 -- ** Manipulating DynFlags
39 defaultDynFlags, -- DynFlags
40 initDynFlags, -- DynFlags -> IO DynFlags
42 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
49 -- ** Parsing DynFlags
51 parseDynamicNoPackageFlags,
54 supportedLanguagesAndExtensions,
56 -- ** DynFlag C compiler options
57 machdepCCOpts, picCCOpts,
59 -- * Configuration of the stg-to-stg passes
63 -- * Compiler configuration suitable for display to the user
67 -- Only in stage 2 can we be sure that the RTS
68 -- exposes the appropriate runtime boolean
73 #include "HsVersions.h"
75 #ifndef OMIT_NATIVE_CODEGEN
80 import PrelNames ( mAIN )
82 import {-# SOURCE #-} Packages (PackageState)
83 import DriverPhases ( Phase(..), phaseInputExt )
86 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
89 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 Data.Map (Map)
103 import qualified Data.Map as Map
104 import System.FilePath
105 import System.IO ( stderr, hPutChar )
107 -- -----------------------------------------------------------------------------
110 -- | Enumerates the simple on-or-off dynamic flags
116 | Opt_D_dump_cmmz_pretty
120 | Opt_D_dump_asm_native
121 | Opt_D_dump_asm_liveness
122 | Opt_D_dump_asm_coalesce
123 | Opt_D_dump_asm_regalloc
124 | Opt_D_dump_asm_regalloc_stages
125 | Opt_D_dump_asm_conflicts
126 | Opt_D_dump_asm_stats
127 | Opt_D_dump_asm_expanded
134 | Opt_D_dump_inlinings
135 | Opt_D_dump_rule_firings
136 | Opt_D_dump_rule_rewrites
137 | Opt_D_dump_occur_anal
141 | Opt_D_dump_simpl_iterations
142 | Opt_D_dump_simpl_phases
151 | Opt_D_dump_worker_wrapper
152 | Opt_D_dump_rn_trace
153 | Opt_D_dump_rn_stats
155 | Opt_D_dump_simpl_stats
156 | Opt_D_dump_tc_trace
157 | Opt_D_dump_if_trace
164 | Opt_D_verbose_core2core
165 | Opt_D_verbose_stg2stg
167 | Opt_D_dump_hi_diffs
168 | Opt_D_dump_minimal_imports
169 | Opt_D_dump_mod_cycles
170 | Opt_D_dump_view_pattern_commoning
171 | Opt_D_faststring_stats
172 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
173 | Opt_D_no_debug_output
179 | Opt_WarnIsError -- -Werror; makes warnings fatal
180 | Opt_WarnDuplicateExports
182 | Opt_WarnImplicitPrelude
183 | Opt_WarnIncompletePatterns
184 | Opt_WarnIncompletePatternsRecUpd
185 | Opt_WarnMissingFields
186 | Opt_WarnMissingImportList
187 | Opt_WarnMissingMethods
188 | Opt_WarnMissingSigs
189 | Opt_WarnMissingLocalSigs
190 | Opt_WarnNameShadowing
191 | Opt_WarnOverlappingPatterns
192 | Opt_WarnTypeDefaults
193 | Opt_WarnMonomorphism
194 | Opt_WarnUnusedBinds
195 | Opt_WarnUnusedImports
196 | Opt_WarnUnusedMatches
197 | Opt_WarnWarningsDeprecations
198 | Opt_WarnDeprecatedFlags
199 | Opt_WarnDodgyExports
200 | Opt_WarnDodgyImports
202 | Opt_WarnAutoOrphans
205 | Opt_WarnUnrecognisedPragmas
206 | Opt_WarnDodgyForeignImports
207 | Opt_WarnLazyUnliftedBindings
208 | Opt_WarnUnusedDoBind
209 | Opt_WarnWrongDoBind
210 | Opt_WarnAlternativeLayoutRuleTransitional
212 | Opt_PrintExplicitForalls
219 | Opt_StaticArgumentTransformation
223 | Opt_DoLambdaEtaExpansion
227 | Opt_UnboxStrictFields
228 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
230 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
232 | Opt_RegsGraph -- do graph coloring register allocation
233 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
236 | Opt_IgnoreInterfacePragmas
237 | Opt_OmitInterfacePragmas
238 | Opt_ExposeAllUnfoldings
241 | Opt_AutoSccsOnAllToplevs
242 | Opt_AutoSccsOnExportedToplevs
243 | Opt_AutoSccsOnIndividualCafs
250 | Opt_ExcessPrecision
251 | Opt_EagerBlackHoling
252 | Opt_ReadUserPackageConf
256 | Opt_HideAllPackages
257 | Opt_PrintBindResult
261 | Opt_BreakOnException
263 | Opt_PrintEvldWithShow
264 | Opt_PrintBindContents
267 | Opt_EmitExternalCore
269 | Opt_BuildingCabalPackage
276 | Opt_ConvertToZipCfgAndBack
277 | Opt_AutoLinkPackages
278 | Opt_ImplicitImportQualified
287 | Opt_KeepRawTokenStream
292 data Language = Haskell98 | Haskell2010
296 | Opt_OverlappingInstances
297 | Opt_UndecidableInstances
298 | Opt_IncoherentInstances
299 | Opt_MonomorphismRestriction
302 | Opt_RelaxedPolyRec -- Deprecated
303 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
304 | Opt_ForeignFunctionInterface
305 | Opt_UnliftedFFITypes
306 | Opt_GHCForeignImportPrim
307 | Opt_PArr -- Syntactic support for parallel arrays
308 | Opt_Arrows -- Arrow-notation syntax
309 | Opt_TemplateHaskell
312 | Opt_Generics -- "Derivable type classes"
313 | Opt_ImplicitPrelude
314 | Opt_ScopedTypeVariables
318 | Opt_OverloadedStrings
319 | Opt_DisambiguateRecordFields
320 | Opt_RecordWildCards
325 | Opt_DoAndIfThenElse
326 | Opt_RebindableSyntax
328 | Opt_StandaloneDeriving
329 | Opt_DeriveDataTypeable
331 | Opt_DeriveTraversable
334 | Opt_TypeSynonymInstances
335 | Opt_FlexibleContexts
336 | Opt_FlexibleInstances
337 | Opt_ConstrainedClassMethods
338 | Opt_MultiParamTypeClasses
339 | Opt_FunctionalDependencies
341 | Opt_PolymorphicComponents
342 | Opt_ExistentialQuantification
346 | Opt_ParallelListComp
347 | Opt_TransformListComp
348 | Opt_GeneralizedNewtypeDeriving
351 | Opt_PostfixOperators
354 | Opt_LiberalTypeSynonyms
357 | Opt_ImpredicativeTypes
361 | Opt_AlternativeLayoutRule
362 | Opt_AlternativeLayoutRuleTransitional
363 | Opt_DatatypeContexts
364 | Opt_NondecreasingIndentation
368 -- | Contains not only a collection of 'DynFlag's but also a plethora of
369 -- information relating to the compilation of a single file or GHC session
370 data DynFlags = DynFlags {
373 hscTarget :: HscTarget,
374 hscOutName :: String, -- ^ Name of the output file
375 extCoreName :: String, -- ^ Name of the .hcr output file
376 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
377 optLevel :: Int, -- ^ Optimisation level
378 simplPhases :: Int, -- ^ Number of simplifier phases
379 maxSimplIterations :: Int, -- ^ Max simplifier iterations
380 shouldDumpSimplPhase :: Maybe String,
381 ruleCheck :: Maybe String,
382 strictnessBefore :: [Int], -- ^ Additional demand analysis
384 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
385 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
386 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
387 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
388 -- See CoreMonad.FloatOutSwitches
390 #ifndef OMIT_NATIVE_CODEGEN
391 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
393 stolen_x86_regs :: Int,
394 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
395 importPaths :: [FilePath],
397 mainFunIs :: Maybe String,
398 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
400 dphBackend :: DPHBackend,
402 thisPackage :: PackageId, -- ^ name of package currently being compiled
405 ways :: [Way], -- ^ Way flags from the command line
406 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
407 rtsBuildTag :: String, -- ^ The RTS \"way\"
409 -- For object splitting
410 splitInfo :: Maybe (String,Int),
413 objectDir :: Maybe String,
414 dylibInstallName :: Maybe String,
415 hiDir :: Maybe String,
416 stubDir :: Maybe String,
422 outputFile :: Maybe String,
423 outputHi :: Maybe String,
424 dynLibLoader :: DynLibLoader,
426 -- | This is set by 'DriverPipeline.runPipeline' based on where
427 -- its output is going.
428 dumpPrefix :: Maybe FilePath,
430 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
431 -- Set by @-ddump-file-prefix@
432 dumpPrefixForce :: Maybe FilePath,
434 includePaths :: [String],
435 libraryPaths :: [String],
436 frameworkPaths :: [String], -- used on darwin only
437 cmdlineFrameworks :: [String], -- ditto
438 tmpDir :: String, -- no trailing '/'
440 ghcUsagePath :: FilePath, -- Filled in by SysTools
441 ghciUsagePath :: FilePath, -- ditto
442 rtsOpts :: Maybe String,
443 rtsOptsEnabled :: RtsOptsEnabled,
445 hpcDir :: String, -- ^ Path to store the .mix files
447 -- options for particular phases
455 opt_windres :: [String],
456 opt_lo :: [String], -- LLVM: llvm optimiser
457 opt_lc :: [String], -- LLVM: llc static compiler
459 -- commands for particular phases
461 pgm_P :: (String,[Option]),
463 pgm_c :: (String,[Option]),
464 pgm_m :: (String,[Option]),
465 pgm_s :: (String,[Option]),
466 pgm_a :: (String,[Option]),
467 pgm_l :: (String,[Option]),
468 pgm_dll :: (String,[Option]),
470 pgm_sysman :: String,
471 pgm_windres :: String,
472 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
473 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
476 depMakefile :: FilePath,
477 depIncludePkgDeps :: Bool,
478 depExcludeMods :: [ModuleName],
479 depSuffixes :: [String],
482 extraPkgConfs :: [FilePath],
483 topDir :: FilePath, -- filled in by SysTools
484 systemPackageConfig :: FilePath, -- ditto
485 -- ^ The @-package-conf@ flags given on the command line, in the order
488 packageFlags :: [PackageFlag],
489 -- ^ The @-package@ and @-hide-package@ flags from the command-line
492 -- NB. do not modify this field, it is calculated by
493 -- Packages.initPackages and Packages.updatePackages.
494 pkgDatabase :: Maybe [PackageConfig],
495 pkgState :: PackageState,
498 -- These have to be IORefs, because the defaultCleanupHandler needs to
499 -- know what to clean when an exception happens
500 filesToClean :: IORef [FilePath],
501 dirsToClean :: IORef (Map FilePath FilePath),
505 -- Don't change this without updating extensionFlags:
506 language :: Maybe Language,
507 -- Don't change this without updating extensionFlags:
508 extensions :: [OnOff ExtensionFlag],
509 -- extensionFlags should always be equal to
510 -- flattenExtensionFlags language extensions
511 extensionFlags :: [ExtensionFlag],
513 -- | Message output action: use "ErrUtils" instead of this if you can
514 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
516 haddockOptions :: Maybe String
519 wayNames :: DynFlags -> [WayName]
520 wayNames = map wayName . ways
522 -- | The target code type of the compilation (if any).
524 -- Whenever you change the target, also make sure to set 'ghcLink' to
525 -- something sensible.
527 -- 'HscNothing' can be used to avoid generating any output, however, note
530 -- * This will not run the desugaring step, thus no warnings generated in
531 -- this step will be output. In particular, this includes warnings related
532 -- to pattern matching. You can run the desugarer manually using
533 -- 'GHC.desugarModule'.
535 -- * If a program uses Template Haskell the typechecker may try to run code
536 -- from an imported module. This will fail if no code has been generated
537 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
538 -- whether this might be the case and choose to either switch to a
539 -- different target or avoid typechecking such modules. (The latter may
540 -- preferable for security reasons.)
543 = HscC -- ^ Generate C code.
544 | HscAsm -- ^ Generate assembly using the native code generator.
545 | HscLlvm -- ^ Generate assembly using the llvm code generator.
546 | HscJava -- ^ Generate Java bytecode.
547 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
548 | HscNothing -- ^ Don't generate any code. See notes above.
551 -- | Will this target result in an object file on the disk?
552 isObjectTarget :: HscTarget -> Bool
553 isObjectTarget HscC = True
554 isObjectTarget HscAsm = True
555 isObjectTarget HscLlvm = True
556 isObjectTarget _ = False
558 -- | The 'GhcMode' tells us whether we're doing multi-module
559 -- compilation (controlled via the "GHC" API) or one-shot
560 -- (single-module) compilation. This makes a difference primarily to
561 -- the "Finder": in one-shot mode we look for interface files for
562 -- imported modules, but in multi-module mode we look for source files
563 -- in order to check whether they need to be recompiled.
565 = CompManager -- ^ @\-\-make@, GHCi, etc.
566 | OneShot -- ^ @ghc -c Foo.hs@
567 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
570 instance Outputable GhcMode where
571 ppr CompManager = ptext (sLit "CompManager")
572 ppr OneShot = ptext (sLit "OneShot")
573 ppr MkDepend = ptext (sLit "MkDepend")
575 isOneShot :: GhcMode -> Bool
576 isOneShot OneShot = True
577 isOneShot _other = False
579 -- | What to do in the link step, if there is one.
581 = NoLink -- ^ Don't link at all
582 | LinkBinary -- ^ Link object code into a binary
583 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
584 -- bytecode and object code).
585 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
588 isNoLink :: GhcLink -> Bool
589 isNoLink NoLink = True
592 -- Is it worth evaluating this Bool and caching it in the DynFlags value
593 -- during initDynFlags?
594 doingTickyProfiling :: DynFlags -> Bool
595 doingTickyProfiling _ = opt_Ticky
596 -- XXX -ticky is a static flag, because it implies -debug which is also
597 -- static. If the way flags were made dynamic, we could fix this.
600 = ExposePackage String
601 | ExposePackageId String
603 | IgnorePackage String
606 defaultHscTarget :: HscTarget
607 defaultHscTarget = defaultObjectTarget
609 -- | The 'HscTarget' value corresponding to the default way to create
610 -- object files on the current platform.
611 defaultObjectTarget :: HscTarget
613 | cGhcWithNativeCodeGen == "YES" = HscAsm
621 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
623 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
624 initDynFlags :: DynFlags -> IO DynFlags
625 initDynFlags dflags = do
626 -- someday these will be dynamic flags
627 ways <- readIORef v_Ways
628 refFilesToClean <- newIORef []
629 refDirsToClean <- newIORef Map.empty
632 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
633 rtsBuildTag = mkBuildTag ways,
634 filesToClean = refFilesToClean,
635 dirsToClean = refDirsToClean
638 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
639 -- and must be fully initialized by 'GHC.newSession' first.
640 defaultDynFlags :: DynFlags
643 ghcMode = CompManager,
644 ghcLink = LinkBinary,
645 hscTarget = defaultHscTarget,
651 maxSimplIterations = 4,
652 shouldDumpSimplPhase = Nothing,
654 specConstrThreshold = Just 200,
655 specConstrCount = Just 3,
656 liberateCaseThreshold = Just 200,
657 floatLamArgs = Just 0, -- Default: float only if no fvs
658 strictnessBefore = [],
660 #ifndef OMIT_NATIVE_CODEGEN
661 targetPlatform = defaultTargetPlatform,
664 cmdlineHcIncludes = [],
668 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
672 thisPackage = mainPackageId,
675 dylibInstallName = Nothing,
679 objectSuf = phaseInputExt StopLn,
680 hcSuf = phaseInputExt HCc,
683 outputFile = Nothing,
685 dynLibLoader = SystemDependent,
686 dumpPrefix = Nothing,
687 dumpPrefixForce = Nothing,
691 cmdlineFrameworks = [],
692 tmpDir = cDEFAULT_TMPDIR,
694 rtsOptsEnabled = RtsOptsSafeOnly,
700 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
713 pkgDatabase = Nothing,
714 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
715 ways = panic "defaultDynFlags: No ways",
716 buildTag = panic "defaultDynFlags: No buildTag",
717 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
719 -- initSysTools fills all these in
720 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
721 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
722 topDir = panic "defaultDynFlags: No topDir",
723 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
724 pgm_L = panic "defaultDynFlags: No pgm_L",
725 pgm_P = panic "defaultDynFlags: No pgm_P",
726 pgm_F = panic "defaultDynFlags: No pgm_F",
727 pgm_c = panic "defaultDynFlags: No pgm_c",
728 pgm_m = panic "defaultDynFlags: No pgm_m",
729 pgm_s = panic "defaultDynFlags: No pgm_s",
730 pgm_a = panic "defaultDynFlags: No pgm_a",
731 pgm_l = panic "defaultDynFlags: No pgm_l",
732 pgm_dll = panic "defaultDynFlags: No pgm_dll",
733 pgm_T = panic "defaultDynFlags: No pgm_T",
734 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
735 pgm_windres = panic "defaultDynFlags: No pgm_windres",
736 pgm_lo = panic "defaultDynFlags: No pgm_lo",
737 pgm_lc = panic "defaultDynFlags: No pgm_lc",
738 -- end of initSysTools values
740 depMakefile = "Makefile",
741 depIncludePkgDeps = False,
744 -- end of ghc -M values
745 filesToClean = panic "defaultDynFlags: No filesToClean",
746 dirsToClean = panic "defaultDynFlags: No dirsToClean",
747 haddockOptions = Nothing,
748 flags = defaultFlags,
751 extensionFlags = flattenExtensionFlags Nothing [],
753 log_action = \severity srcSpan style msg ->
755 SevOutput -> printOutput (msg style)
756 SevInfo -> printErrs (msg style)
757 SevFatal -> printErrs (msg style)
760 printErrs ((mkLocMessage srcSpan msg) style)
761 -- careful (#2302): printErrs prints in UTF-8, whereas
762 -- converting to string first and using hPutStr would
763 -- just emit the low 8 bits of each unicode char.
767 Note [Verbosity levels]
768 ~~~~~~~~~~~~~~~~~~~~~~~
769 0 | print errors & warnings only
770 1 | minimal verbosity: print "compiling M ... done." for each module.
771 2 | equivalent to -dshow-passes
772 3 | equivalent to existing "ghc -v"
773 4 | "ghc -v -ddump-most"
774 5 | "ghc -v -ddump-all"
780 -- OnOffs accumulate in reverse order, so we use foldr in order to
781 -- process them in the right order
782 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
784 flattenExtensionFlags ml = foldr f defaultExtensionFlags
785 where f (On f) flags = f : delete f flags
786 f (Off f) flags = delete f flags
787 defaultExtensionFlags = languageExtensions ml
789 languageExtensions :: Maybe Language -> [ExtensionFlag]
791 languageExtensions Nothing
792 -- Nothing => the default case
793 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
794 -- behaviour the default, to see if anyone notices
796 -- In due course I'd like Opt_MonoLocalBinds to be on by default
797 -- But NB it's implied by GADTs etc
798 -- SLPJ September 2010
799 : Opt_NondecreasingIndentation -- This has been on by default for some time
800 : Opt_RelaxedLayout -- This has been on by default for some time
801 : languageExtensions (Just Haskell2010)
803 languageExtensions (Just Haskell98)
804 = [Opt_ImplicitPrelude,
805 Opt_MonomorphismRestriction,
807 Opt_DatatypeContexts]
809 languageExtensions (Just Haskell2010)
810 = [Opt_ImplicitPrelude,
811 Opt_MonomorphismRestriction,
812 Opt_DatatypeContexts,
814 Opt_ForeignFunctionInterface,
819 -- | Test whether a 'DynFlag' is set
820 dopt :: DynFlag -> DynFlags -> Bool
821 dopt f dflags = f `elem` (flags dflags)
824 dopt_set :: DynFlags -> DynFlag -> DynFlags
825 dopt_set dfs f = dfs{ flags = f : flags dfs }
827 -- | Unset a 'DynFlag'
828 dopt_unset :: DynFlags -> DynFlag -> DynFlags
829 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
831 -- | Test whether a 'ExtensionFlag' is set
832 xopt :: ExtensionFlag -> DynFlags -> Bool
833 xopt f dflags = f `elem` extensionFlags dflags
835 -- | Set a 'ExtensionFlag'
836 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
838 = let onoffs = On f : extensions dfs
839 in dfs { extensions = onoffs,
840 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
842 -- | Unset a 'ExtensionFlag'
843 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
845 = let onoffs = Off f : extensions dfs
846 in dfs { extensions = onoffs,
847 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
849 setLanguage :: Language -> DynP ()
850 setLanguage l = upd f
851 where f dfs = let mLang = Just l
852 oneoffs = extensions dfs
855 extensionFlags = flattenExtensionFlags mLang oneoffs
858 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
859 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
860 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
861 -> [a] -- ^ Correctly ordered extracted options
862 getOpts dflags opts = reverse (opts dflags)
863 -- We add to the options from the front, so we need to reverse the list
865 -- | Gets the verbosity flag for the current verbosity level. This is fed to
866 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
867 getVerbFlag :: DynFlags -> String
869 | verbosity dflags >= 3 = "-v"
872 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
873 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
874 setPgmP, addOptl, addOptP,
875 addCmdlineFramework, addHaddockOpts
876 :: String -> DynFlags -> DynFlags
877 setOutputFile, setOutputHi, setDumpPrefixForce
878 :: Maybe String -> DynFlags -> DynFlags
880 setObjectDir f d = d{ objectDir = Just f}
881 setHiDir f d = d{ hiDir = Just f}
882 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
883 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
884 -- \#included from the .hc file when compiling with -fvia-C.
885 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
886 setDylibInstallName f d = d{ dylibInstallName = Just f}
888 setObjectSuf f d = d{ objectSuf = f}
889 setHiSuf f d = d{ hiSuf = f}
890 setHcSuf f d = d{ hcSuf = f}
892 setOutputFile f d = d{ outputFile = f}
893 setOutputHi f d = d{ outputHi = f}
895 parseDynLibLoaderMode f d =
897 ("deploy", "") -> d{ dynLibLoader = Deployable }
898 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
899 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
901 setDumpPrefixForce f d = d { dumpPrefixForce = f}
903 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
904 -- Config.hs should really use Option.
905 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
906 addOptl f d = d{ opt_l = f : opt_l d}
907 addOptP f d = d{ opt_P = f : opt_P d}
910 setDepMakefile :: FilePath -> DynFlags -> DynFlags
911 setDepMakefile f d = d { depMakefile = deOptDep f }
913 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
914 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
916 addDepExcludeMod :: String -> DynFlags -> DynFlags
918 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
920 addDepSuffix :: FilePath -> DynFlags -> DynFlags
921 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
924 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
925 -- we need to strip the "-optdep" off of the arg
926 deOptDep :: String -> String
927 deOptDep x = case stripPrefix "-optdep" x of
931 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
933 addHaddockOpts f d = d{ haddockOptions = Just f}
935 -- -----------------------------------------------------------------------------
936 -- Command-line options
938 -- | When invoking external tools as part of the compilation pipeline, we
939 -- pass these a sequence of options on the command-line. Rather than
940 -- just using a list of Strings, we use a type that allows us to distinguish
941 -- between filepaths and 'other stuff'. The reason for this is that
942 -- this type gives us a handle on transforming filenames, and filenames only,
943 -- to whatever format they're expected to be on a particular platform.
945 = FileOption -- an entry that _contains_ filename(s) / filepaths.
946 String -- a non-filepath prefix that shouldn't be
947 -- transformed (e.g., "/out=")
948 String -- the filepath/filename portion
951 showOpt :: Option -> String
952 showOpt (FileOption pre f) = pre ++ f
953 showOpt (Option s) = s
955 -----------------------------------------------------------------------------
956 -- Setting the optimisation level
958 updOptLevel :: Int -> DynFlags -> DynFlags
959 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
961 = dfs2{ optLevel = final_n }
963 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
964 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
965 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
967 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
968 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
970 -- -----------------------------------------------------------------------------
971 -- StgToDo: abstraction of stg-to-stg passes to run.
974 = StgDoMassageForProfiling -- should be (next to) last
975 -- There's also setStgVarInfo, but its absolute "lastness"
976 -- is so critical that it is hardwired in (no flag).
979 getStgToDo :: DynFlags -> [StgToDo]
983 stg_stats = dopt Opt_StgStats dflags
985 todo1 = if stg_stats then [D_stg_stats] else []
987 todo2 | WayProf `elem` wayNames dflags
988 = StgDoMassageForProfiling : todo1
992 {- **********************************************************************
996 %********************************************************************* -}
998 -- -----------------------------------------------------------------------------
999 -- Parsing the dynamic flags.
1001 -- | Parse dynamic flags from a list of command line arguments. Returns the
1002 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1003 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1004 -- flags or missing arguments).
1005 parseDynamicFlags :: Monad m =>
1006 DynFlags -> [Located String]
1007 -> m (DynFlags, [Located String], [Located String])
1008 -- ^ Updated 'DynFlags', left-over arguments, and
1009 -- list of warnings.
1010 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1012 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1013 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1014 parseDynamicNoPackageFlags :: Monad m =>
1015 DynFlags -> [Located String]
1016 -> m (DynFlags, [Located String], [Located String])
1017 -- ^ Updated 'DynFlags', left-over arguments, and
1018 -- list of warnings.
1019 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1021 parseDynamicFlags_ :: Monad m =>
1022 DynFlags -> [Located String] -> Bool
1023 -> m (DynFlags, [Located String], [Located String])
1024 parseDynamicFlags_ dflags0 args pkg_flags = do
1025 -- XXX Legacy support code
1026 -- We used to accept things like
1027 -- optdep-f -optdepdepend
1028 -- optdep-f -optdep depend
1029 -- optdep -f -optdepdepend
1030 -- optdep -f -optdep depend
1031 -- but the spaces trip up proper argument handling. So get rid of them.
1032 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1033 f (x : xs) = x : f xs
1037 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1038 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1039 | otherwise = dynamic_flags
1041 let ((leftover, errs, warns), dflags1)
1042 = runCmdLine (processArgs flag_spec args') dflags0
1043 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1045 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1046 -- isn't up to the job. We know that if hscTarget == HscC, then the
1047 -- user has explicitly used -fvia-C, because -fasm is the default,
1048 -- unless there is no NCG on this platform. The latter case is
1049 -- checked when the -fPIC flag is parsed.
1051 let (pic_warns, dflags2)
1052 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1053 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1054 dflags1{ hscTarget = HscAsm })
1055 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1056 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1057 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1058 ++ "dynamic on this platform;\n ignoring -fllvm"],
1059 dflags1{ hscTarget = HscAsm })
1061 | otherwise = ([], dflags1)
1063 return (dflags2, leftover, pic_warns ++ warns)
1066 {- **********************************************************************
1068 DynFlags specifications
1070 %********************************************************************* -}
1072 allFlags :: [String]
1073 allFlags = map ('-':) $
1074 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1075 map ("fno-"++) flags ++
1076 map ("f"++) flags ++
1077 map ("f"++) flags' ++
1078 map ("X"++) supportedExtensions
1079 where ok (PrefixPred _ _) = False
1081 flags = [ name | (name, _, _) <- fFlags ]
1082 flags' = [ name | (name, _, _) <- fLangFlags ]
1084 --------------- The main flags themselves ------------------
1085 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1087 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1088 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1089 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1091 (HasArg (\s -> do { addCmdlineHCInclude s
1092 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1093 , Flag "v" (OptIntSuffix setVerbosity)
1095 ------- Specific phases --------------------------------------------
1096 -- need to appear before -pgmL to be parsed as LLVM flags.
1097 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1098 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1099 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1100 , Flag "pgmP" (hasArg setPgmP)
1101 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1102 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1103 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1104 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1105 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1106 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1107 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1108 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1110 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1111 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1112 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1113 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1114 , Flag "optP" (hasArg addOptP)
1115 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1116 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1117 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1118 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1119 , Flag "optl" (hasArg addOptl)
1120 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1123 (NoArg (if can_split
1124 then setDynFlag Opt_SplitObjs
1125 else addWarn "ignoring -fsplit-objs"))
1127 -------- ghc -M -----------------------------------------------------
1128 , Flag "dep-suffix" (hasArg addDepSuffix)
1129 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1130 , Flag "dep-makefile" (hasArg setDepMakefile)
1131 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1132 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1133 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1134 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1135 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1136 , Flag "exclude-module" (hasArg addDepExcludeMod)
1137 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1138 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1140 -------- Linking ----------------------------------------------------
1141 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1142 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1143 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1144 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1146 ------- Libraries ---------------------------------------------------
1147 , Flag "L" (Prefix addLibraryPath)
1148 , Flag "l" (AnySuffix (upd . addOptl))
1150 ------- Frameworks --------------------------------------------------
1151 -- -framework-path should really be -F ...
1152 , Flag "framework-path" (HasArg addFrameworkPath)
1153 , Flag "framework" (hasArg addCmdlineFramework)
1155 ------- Output Redirection ------------------------------------------
1156 , Flag "odir" (hasArg setObjectDir)
1157 , Flag "o" (SepArg (upd . setOutputFile . Just))
1158 , Flag "ohi" (hasArg (setOutputHi . Just ))
1159 , Flag "osuf" (hasArg setObjectSuf)
1160 , Flag "hcsuf" (hasArg setHcSuf)
1161 , Flag "hisuf" (hasArg setHiSuf)
1162 , Flag "hidir" (hasArg setHiDir)
1163 , Flag "tmpdir" (hasArg setTmpDir)
1164 , Flag "stubdir" (hasArg setStubDir)
1165 , Flag "outputdir" (hasArg setOutputDir)
1166 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1168 ------- Keeping temporary files -------------------------------------
1169 -- These can be singular (think ghc -c) or plural (think ghc --make)
1170 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1171 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1172 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1173 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1174 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1175 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1176 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1177 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1178 -- This only makes sense as plural
1179 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1181 ------- Miscellaneous ----------------------------------------------
1182 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1183 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1184 , Flag "with-rtsopts" (HasArg setRtsOpts)
1185 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1186 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1187 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1188 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1189 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1190 , Flag "main-is" (SepArg setMainIs)
1191 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1192 , Flag "haddock-opts" (hasArg addHaddockOpts)
1193 , Flag "hpcdir" (SepArg setOptHpcDir)
1195 ------- recompilation checker --------------------------------------
1196 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1197 ; deprecate "Use -fno-force-recomp instead" }))
1198 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1199 ; deprecate "Use -fforce-recomp instead" }))
1201 ------ HsCpp opts ---------------------------------------------------
1202 , Flag "D" (AnySuffix (upd . addOptP))
1203 , Flag "U" (AnySuffix (upd . addOptP))
1205 ------- Include/Import Paths ----------------------------------------
1206 , Flag "I" (Prefix addIncludePath)
1207 , Flag "i" (OptPrefix addImportPath)
1209 ------ Debugging ----------------------------------------------------
1210 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1212 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1213 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1214 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1215 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1216 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1217 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1218 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1219 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1220 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1221 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1222 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1223 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1224 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1225 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1226 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1227 ; setDumpFlag' Opt_D_dump_llvm}))
1228 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1229 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1230 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1231 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1232 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1233 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1234 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1235 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1236 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1237 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1238 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1239 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1240 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1241 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1242 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1243 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1244 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1245 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1246 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1247 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1248 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1249 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1250 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1251 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1252 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1253 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1254 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1255 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1256 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1257 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1258 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1259 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1260 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1261 ; setVerboseCore2Core }))
1262 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1263 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1264 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1265 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1266 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1267 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1268 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1269 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1270 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1271 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1272 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1273 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1274 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1275 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1276 , Flag "dshow-passes" (NoArg (do forceRecompile
1277 setVerbosity (Just 2)))
1278 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1280 ------ Machine dependant (-m<blah>) stuff ---------------------------
1282 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1283 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1284 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1285 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1287 ------ Warning opts -------------------------------------------------
1288 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1289 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1290 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1291 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1292 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1293 ; deprecate "Use -w instead" }))
1294 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1296 ------ Optimisation flags ------------------------------------------
1297 , Flag "O" (noArg (setOptLevel 1))
1298 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1299 , Flag "Odph" (noArg setDPHOpt)
1300 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1301 -- If the number is missing, use 1
1303 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1304 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1305 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1306 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1307 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1308 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1309 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1310 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1311 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1312 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1313 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1314 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1315 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1317 ------ Profiling ----------------------------------------------------
1319 -- XXX Should the -f* flags be deprecated?
1320 -- They don't seem to be documented
1321 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1322 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1323 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1324 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1325 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1326 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1327 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1328 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1329 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1331 ------ DPH flags ----------------------------------------------------
1333 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1334 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1335 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1337 ------ Compiler flags -----------------------------------------------
1339 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1340 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1341 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1342 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1343 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1344 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1346 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1347 setTarget HscNothing))
1348 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1349 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1350 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1351 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1353 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1354 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1355 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1356 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1357 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1358 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1359 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1361 package_flags :: [Flag (CmdLineP DynFlags)]
1363 ------- Packages ----------------------------------------------------
1364 Flag "package-conf" (HasArg extraPkgConf_)
1365 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1366 , Flag "package-name" (hasArg setPackageName)
1367 , Flag "package-id" (HasArg exposePackageId)
1368 , Flag "package" (HasArg exposePackage)
1369 , Flag "hide-package" (HasArg hidePackage)
1370 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1371 , Flag "ignore-package" (HasArg ignorePackage)
1372 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1373 ; deprecate "Use -package instead" }))
1376 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1377 -- False <=> we are turning the flag off
1378 turnOn :: TurnOnFlag; turnOn = True
1379 turnOff :: TurnOnFlag; turnOff = False
1382 = ( String -- Flag in string form
1383 , flag -- Flag in internal form
1384 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1385 -- Typically, emit a warning or error
1387 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1388 -> String -- ^ The flag prefix
1389 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1390 -> FlagSpec flag -- ^ Specification of this particular flag
1391 -> Flag (CmdLineP DynFlags)
1392 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1393 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1395 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1396 deprecatedForExtension lang turn_on
1397 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1399 flag | turn_on = lang
1400 | otherwise = "No"++lang
1402 useInstead :: String -> TurnOnFlag -> DynP ()
1403 useInstead flag turn_on
1404 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1406 no = if turn_on then "" else "no-"
1408 nop :: TurnOnFlag -> DynP ()
1411 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1412 fFlags :: [FlagSpec DynFlag]
1414 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1415 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1416 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1417 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1418 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1419 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1420 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1421 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1422 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1423 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1424 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1425 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1426 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1427 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1428 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1429 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1430 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1431 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1432 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1433 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1434 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1435 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1436 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1437 ( "warn-orphans", Opt_WarnOrphans, nop ),
1438 ( "warn-identities", Opt_WarnIdentities, nop ),
1439 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1440 ( "warn-tabs", Opt_WarnTabs, nop ),
1441 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1442 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1443 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1444 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1445 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1446 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1447 ( "strictness", Opt_Strictness, nop ),
1448 ( "specialise", Opt_Specialise, nop ),
1449 ( "float-in", Opt_FloatIn, nop ),
1450 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1451 ( "full-laziness", Opt_FullLaziness, nop ),
1452 ( "liberate-case", Opt_LiberateCase, nop ),
1453 ( "spec-constr", Opt_SpecConstr, nop ),
1454 ( "cse", Opt_CSE, nop ),
1455 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1456 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1457 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1458 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1459 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1460 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1461 ( "case-merge", Opt_CaseMerge, nop ),
1462 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1463 ( "method-sharing", Opt_MethodSharing,
1464 \_ -> deprecate "doesn't do anything any more"),
1465 -- Remove altogether in GHC 7.2
1466 ( "dicts-cheap", Opt_DictsCheap, nop ),
1467 ( "excess-precision", Opt_ExcessPrecision, nop ),
1468 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1469 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1470 ( "print-bind-result", Opt_PrintBindResult, nop ),
1471 ( "force-recomp", Opt_ForceRecomp, nop ),
1472 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1473 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1474 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1475 ( "break-on-exception", Opt_BreakOnException, nop ),
1476 ( "break-on-error", Opt_BreakOnError, nop ),
1477 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1478 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1479 ( "run-cps", Opt_RunCPS, nop ),
1480 ( "run-cpsz", Opt_RunCPSZ, nop ),
1481 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1482 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1483 ( "vectorise", Opt_Vectorise, nop ),
1484 ( "regs-graph", Opt_RegsGraph, nop ),
1485 ( "regs-iterative", Opt_RegsIterative, nop ),
1486 ( "gen-manifest", Opt_GenManifest, nop ),
1487 ( "embed-manifest", Opt_EmbedManifest, nop ),
1488 ( "ext-core", Opt_EmitExternalCore, nop ),
1489 ( "shared-implib", Opt_SharedImplib, nop ),
1490 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1491 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1492 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1495 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1496 fLangFlags :: [FlagSpec ExtensionFlag]
1498 ( "th", Opt_TemplateHaskell,
1499 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1500 ( "fi", Opt_ForeignFunctionInterface,
1501 deprecatedForExtension "ForeignFunctionInterface" ),
1502 ( "ffi", Opt_ForeignFunctionInterface,
1503 deprecatedForExtension "ForeignFunctionInterface" ),
1504 ( "arrows", Opt_Arrows,
1505 deprecatedForExtension "Arrows" ),
1506 ( "generics", Opt_Generics,
1507 deprecatedForExtension "Generics" ),
1508 ( "implicit-prelude", Opt_ImplicitPrelude,
1509 deprecatedForExtension "ImplicitPrelude" ),
1510 ( "bang-patterns", Opt_BangPatterns,
1511 deprecatedForExtension "BangPatterns" ),
1512 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1513 deprecatedForExtension "MonomorphismRestriction" ),
1514 ( "mono-pat-binds", Opt_MonoPatBinds,
1515 deprecatedForExtension "MonoPatBinds" ),
1516 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1517 deprecatedForExtension "ExtendedDefaultRules" ),
1518 ( "implicit-params", Opt_ImplicitParams,
1519 deprecatedForExtension "ImplicitParams" ),
1520 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1521 deprecatedForExtension "ScopedTypeVariables" ),
1523 deprecatedForExtension "PArr" ),
1524 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1525 deprecatedForExtension "OverlappingInstances" ),
1526 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1527 deprecatedForExtension "UndecidableInstances" ),
1528 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1529 deprecatedForExtension "IncoherentInstances" )
1532 supportedLanguages :: [String]
1533 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1535 supportedExtensions :: [String]
1536 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1538 supportedLanguagesAndExtensions :: [String]
1539 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1541 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1542 languageFlags :: [FlagSpec Language]
1544 ( "Haskell98", Haskell98, nop ),
1545 ( "Haskell2010", Haskell2010, nop )
1548 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1549 xFlags :: [FlagSpec ExtensionFlag]
1551 ( "CPP", Opt_Cpp, nop ),
1552 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1553 ( "TupleSections", Opt_TupleSections, nop ),
1554 ( "PatternGuards", Opt_PatternGuards, nop ),
1555 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1556 ( "MagicHash", Opt_MagicHash, nop ),
1557 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1558 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1559 ( "KindSignatures", Opt_KindSignatures, nop ),
1560 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1561 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1562 ( "TransformListComp", Opt_TransformListComp, nop ),
1563 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1564 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1565 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1566 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1567 ( "Rank2Types", Opt_Rank2Types, nop ),
1568 ( "RankNTypes", Opt_RankNTypes, nop ),
1569 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1570 ( "TypeOperators", Opt_TypeOperators, nop ),
1571 ( "RecursiveDo", Opt_RecursiveDo,
1572 deprecatedForExtension "DoRec"),
1573 ( "DoRec", Opt_DoRec, nop ),
1574 ( "Arrows", Opt_Arrows, nop ),
1575 ( "PArr", Opt_PArr, nop ),
1576 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1577 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1578 ( "Generics", Opt_Generics, nop ),
1579 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1580 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1581 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1582 ( "RecordPuns", Opt_RecordPuns,
1583 deprecatedForExtension "NamedFieldPuns" ),
1584 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1585 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1586 ( "GADTs", Opt_GADTs, nop ),
1587 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1588 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1589 ( "BangPatterns", Opt_BangPatterns, nop ),
1590 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1591 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1592 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1593 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1594 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1595 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1596 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1597 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1598 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1599 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1600 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1601 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1602 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1603 \ turn_on -> if not turn_on
1604 then deprecate "You can't turn off RelaxedPolyRec any more"
1606 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1607 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1608 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1610 ( "PatternSignatures", Opt_ScopedTypeVariables,
1611 deprecatedForExtension "ScopedTypeVariables" ),
1613 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1614 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1615 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1616 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1617 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1618 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1619 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1620 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1621 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1622 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1623 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1624 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1625 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1626 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1627 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1628 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1629 ( "PackageImports", Opt_PackageImports, nop )
1632 defaultFlags :: [DynFlag]
1634 = [ Opt_AutoLinkPackages,
1635 Opt_ReadUserPackageConf,
1643 Opt_PrintBindContents,
1647 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1648 -- The default -O0 options
1652 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1654 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1655 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1656 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1657 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1658 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1659 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1661 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1663 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1664 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1666 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1667 -- all over the place
1669 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1671 -- Record wild-cards implies field disambiguation
1672 -- Otherwise if you write (C {..}) you may well get
1673 -- stuff like " 'a' not in scope ", which is a bit silly
1674 -- if the compiler has just filled in field 'a' of constructor 'C'
1675 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1678 optLevelFlags :: [([Int], DynFlag)]
1680 = [ ([0], Opt_IgnoreInterfacePragmas)
1681 , ([0], Opt_OmitInterfacePragmas)
1683 , ([1,2], Opt_IgnoreAsserts)
1684 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1686 , ([1,2], Opt_DoEtaReduction)
1687 , ([1,2], Opt_CaseMerge)
1688 , ([1,2], Opt_Strictness)
1690 , ([1,2], Opt_FullLaziness)
1691 , ([1,2], Opt_Specialise)
1692 , ([1,2], Opt_FloatIn)
1694 , ([2], Opt_LiberateCase)
1695 , ([2], Opt_SpecConstr)
1696 , ([2], Opt_RegsGraph)
1698 -- , ([2], Opt_StaticArgumentTransformation)
1699 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1700 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1701 -- several improvements to the heuristics, and I'm concerned that without
1702 -- those changes SAT will interfere with some attempts to write "high
1703 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1704 -- this year. In particular, the version in HEAD lacks the tail call
1705 -- criterion, so many things that look like reasonable loops will be
1706 -- turned into functions with extra (unneccesary) thunk creation.
1708 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1709 -- This one is important for a tiresome reason:
1710 -- we want to make sure that the bindings for data
1711 -- constructors are eta-expanded. This is probably
1712 -- a good thing anyway, but it seems fragile.
1715 -- -----------------------------------------------------------------------------
1716 -- Standard sets of warning options
1718 standardWarnings :: [DynFlag]
1720 = [ Opt_WarnWarningsDeprecations,
1721 Opt_WarnDeprecatedFlags,
1722 Opt_WarnUnrecognisedPragmas,
1723 Opt_WarnOverlappingPatterns,
1724 Opt_WarnMissingFields,
1725 Opt_WarnMissingMethods,
1726 Opt_WarnDuplicateExports,
1727 Opt_WarnLazyUnliftedBindings,
1728 Opt_WarnDodgyForeignImports,
1729 Opt_WarnWrongDoBind,
1730 Opt_WarnAlternativeLayoutRuleTransitional
1733 minusWOpts :: [DynFlag]
1735 = standardWarnings ++
1736 [ Opt_WarnUnusedBinds,
1737 Opt_WarnUnusedMatches,
1738 Opt_WarnUnusedImports,
1739 Opt_WarnIncompletePatterns,
1740 Opt_WarnDodgyExports,
1741 Opt_WarnDodgyImports
1744 minusWallOpts :: [DynFlag]
1747 [ Opt_WarnTypeDefaults,
1748 Opt_WarnNameShadowing,
1749 Opt_WarnMissingSigs,
1752 Opt_WarnUnusedDoBind,
1756 -- minuswRemovesOpts should be every warning option
1757 minuswRemovesOpts :: [DynFlag]
1760 [Opt_WarnImplicitPrelude,
1761 Opt_WarnIncompletePatternsRecUpd,
1762 Opt_WarnMonomorphism,
1763 Opt_WarnUnrecognisedPragmas,
1764 Opt_WarnAutoOrphans,
1768 enableGlasgowExts :: DynP ()
1769 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1770 mapM_ setExtensionFlag glasgowExtsFlags
1772 disableGlasgowExts :: DynP ()
1773 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1774 mapM_ unSetExtensionFlag glasgowExtsFlags
1776 glasgowExtsFlags :: [ExtensionFlag]
1777 glasgowExtsFlags = [
1778 Opt_ForeignFunctionInterface
1779 , Opt_UnliftedFFITypes
1780 , Opt_ImplicitParams
1781 , Opt_ScopedTypeVariables
1783 , Opt_TypeSynonymInstances
1784 , Opt_StandaloneDeriving
1785 , Opt_DeriveDataTypeable
1787 , Opt_DeriveFoldable
1788 , Opt_DeriveTraversable
1789 , Opt_FlexibleContexts
1790 , Opt_FlexibleInstances
1791 , Opt_ConstrainedClassMethods
1792 , Opt_MultiParamTypeClasses
1793 , Opt_FunctionalDependencies
1795 , Opt_PolymorphicComponents
1796 , Opt_ExistentialQuantification
1798 , Opt_PostfixOperators
1800 , Opt_LiberalTypeSynonyms
1804 , Opt_ParallelListComp
1805 , Opt_EmptyDataDecls
1806 , Opt_KindSignatures
1807 , Opt_GeneralizedNewtypeDeriving ]
1810 -- Consult the RTS to find whether GHC itself has been built profiled
1811 -- If so, you can't use Template Haskell
1812 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1814 rtsIsProfiled :: Bool
1815 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1817 checkTemplateHaskellOk :: Bool -> DynP ()
1818 checkTemplateHaskellOk turn_on
1819 | turn_on && rtsIsProfiled
1820 = addErr "You can't use Template Haskell with a profiled compiler"
1824 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1825 -- so we simply say "ok". It doesn't matter because TH isn't
1826 -- available in stage 1 anyway.
1827 checkTemplateHaskellOk turn_on = return ()
1830 {- **********************************************************************
1832 DynFlags constructors
1834 %********************************************************************* -}
1836 type DynP = EwM (CmdLineP DynFlags)
1838 upd :: (DynFlags -> DynFlags) -> DynP ()
1839 upd f = liftEwM (do { dfs <- getCmdLineState
1840 ; putCmdLineState $! (f dfs) })
1842 --------------- Constructor functions for OptKind -----------------
1843 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1844 noArg fn = NoArg (upd fn)
1846 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1847 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1849 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1850 hasArg fn = HasArg (upd . fn)
1852 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1853 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1854 ; deprecate deprec })
1856 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1857 intSuffix fn = IntSuffix (\n -> upd (fn n))
1859 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1860 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1862 --------------------------
1863 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1864 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1865 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1867 --------------------------
1868 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1869 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1872 deps = [ if turn_on then setExtensionFlag d
1873 else unSetExtensionFlag d
1874 | (f', turn_on, d) <- impliedFlags, f' == f ]
1875 -- When you set f, set the ones it implies
1876 -- NB: use setExtensionFlag recursively, in case the implied flags
1877 -- implies further flags
1879 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1880 -- When you un-set f, however, we don't un-set the things it implies
1881 -- (except for -fno-glasgow-exts, which is treated specially)
1883 --------------------------
1884 setDumpFlag' :: DynFlag -> DynP ()
1885 setDumpFlag' dump_flag
1886 = do { setDynFlag dump_flag
1887 ; when want_recomp forceRecompile }
1889 -- Certain dumpy-things are really interested in what's going
1890 -- on during recompilation checking, so in those cases we
1891 -- don't want to turn it off.
1892 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1893 Opt_D_dump_hi_diffs]
1895 forceRecompile :: DynP ()
1896 -- Whenver we -ddump, force recompilation (by switching off the
1897 -- recompilation checker), else you don't see the dump! However,
1898 -- don't switch it off in --make mode, else *everything* gets
1899 -- recompiled which probably isn't what you want
1900 forceRecompile = do { dfs <- liftEwM getCmdLineState
1901 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1903 force_recomp dfs = isOneShot (ghcMode dfs)
1905 setVerboseCore2Core :: DynP ()
1906 setVerboseCore2Core = do forceRecompile
1907 setDynFlag Opt_D_verbose_core2core
1908 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1911 setDumpSimplPhases :: String -> DynP ()
1912 setDumpSimplPhases s = do forceRecompile
1913 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1915 spec = case s of { ('=' : s') -> s'; _ -> s }
1917 setVerbosity :: Maybe Int -> DynP ()
1918 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1920 addCmdlineHCInclude :: String -> DynP ()
1921 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1923 extraPkgConf_ :: FilePath -> DynP ()
1924 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1926 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1928 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1930 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1932 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1934 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1936 setPackageName :: String -> DynFlags -> DynFlags
1937 setPackageName p s = s{ thisPackage = stringToPackageId p }
1939 -- If we're linking a binary, then only targets that produce object
1940 -- code are allowed (requests for other target types are ignored).
1941 setTarget :: HscTarget -> DynP ()
1942 setTarget l = upd set
1945 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1948 -- Changes the target only if we're compiling object code. This is
1949 -- used by -fasm and -fvia-C, which switch from one to the other, but
1950 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1951 -- can be safely used in an OPTIONS_GHC pragma.
1952 setObjTarget :: HscTarget -> DynP ()
1953 setObjTarget l = upd set
1956 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1959 setOptLevel :: Int -> DynFlags -> DynFlags
1960 setOptLevel n dflags
1961 | hscTarget dflags == HscInterpreted && n > 0
1963 -- not in IO any more, oh well:
1964 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1966 = updOptLevel n dflags
1969 -- -Odph is equivalent to
1971 -- -O2 optimise as much as possible
1972 -- -fno-method-sharing sharing specialisation defeats fusion
1974 -- -fdicts-cheap always inline dictionaries
1975 -- -fmax-simplifier-iterations20 this is necessary sometimes
1976 -- -fsimplifier-phases=3 we use an additional simplifier phase
1978 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1979 -- -fno-spec-constr-count SpecConstr as much as possible
1980 -- -finline-enough-args hack to prevent excessive inlining
1982 setDPHOpt :: DynFlags -> DynFlags
1983 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1985 , specConstrThreshold = Nothing
1986 , specConstrCount = Nothing
1988 `dopt_set` Opt_DictsCheap
1990 data DPHBackend = DPHPar
1993 deriving(Eq, Ord, Enum, Show)
1995 setDPHBackend :: DPHBackend -> DynP ()
1996 setDPHBackend backend
1998 upd $ \dflags -> dflags { dphBackend = backend }
1999 mapM_ exposePackage (dph_packages backend)
2001 dph_packages DPHThis = []
2002 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2003 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2005 dphPackage :: DynFlags -> PackageId
2006 dphPackage dflags = case dphBackend dflags of
2007 DPHPar -> dphParPackageId
2008 DPHSeq -> dphSeqPackageId
2009 DPHThis -> thisPackage dflags
2011 setMainIs :: String -> DynP ()
2013 | not (null main_fn) && isLower (head main_fn)
2014 -- The arg looked like "Foo.Bar.baz"
2015 = upd $ \d -> d{ mainFunIs = Just main_fn,
2016 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2018 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2019 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2021 | otherwise -- The arg looked like "baz"
2022 = upd $ \d -> d{ mainFunIs = Just arg }
2024 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2026 -----------------------------------------------------------------------------
2027 -- Paths & Libraries
2029 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2031 -- -i on its own deletes the import paths
2032 addImportPath "" = upd (\s -> s{importPaths = []})
2033 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2037 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2040 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2042 addFrameworkPath p =
2043 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2045 #ifndef mingw32_TARGET_OS
2046 split_marker :: Char
2047 split_marker = ':' -- not configurable (ToDo)
2050 splitPathList :: String -> [String]
2051 splitPathList s = filter notNull (splitUp s)
2052 -- empty paths are ignored: there might be a trailing
2053 -- ':' in the initial list, for example. Empty paths can
2054 -- cause confusion when they are translated into -I options
2055 -- for passing to gcc.
2057 #ifndef mingw32_TARGET_OS
2058 splitUp xs = split split_marker xs
2060 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2062 -- That is, if "foo:bar:baz" is used, this interpreted as
2063 -- consisting of three entries, 'foo', 'bar', 'baz'.
2064 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2065 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2067 -- Notice that no attempt is made to fully replace the 'standard'
2068 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2069 -- that this will cause too much breakage for users & ':' will
2070 -- work fine even with DOS paths, if you're not insisting on being silly.
2073 splitUp (x:':':div:xs) | div `elem` dir_markers
2074 = ((x:':':div:p): splitUp rs)
2076 (p,rs) = findNextPath xs
2077 -- we used to check for existence of the path here, but that
2078 -- required the IO monad to be threaded through the command-line
2079 -- parser which is quite inconvenient. The
2080 splitUp xs = cons p (splitUp rs)
2082 (p,rs) = findNextPath xs
2087 -- will be called either when we've consumed nought or the
2088 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2089 -- finding the next split marker.
2091 case break (`elem` split_markers) xs of
2092 (p, _:ds) -> (p, ds)
2095 split_markers :: [Char]
2096 split_markers = [':', ';']
2098 dir_markers :: [Char]
2099 dir_markers = ['/', '\\']
2102 -- -----------------------------------------------------------------------------
2103 -- tmpDir, where we store temporary files.
2105 setTmpDir :: FilePath -> DynFlags -> DynFlags
2106 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2107 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2108 -- seem necessary now --SDM 7/2/2008
2110 -----------------------------------------------------------------------------
2113 setRtsOpts :: String -> DynP ()
2114 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2116 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2117 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2119 -----------------------------------------------------------------------------
2122 setOptHpcDir :: String -> DynP ()
2123 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2125 -----------------------------------------------------------------------------
2126 -- Via-C compilation stuff
2128 -- There are some options that we need to pass to gcc when compiling
2129 -- Haskell code via C, but are only supported by recent versions of
2130 -- gcc. The configure script decides which of these options we need,
2131 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2132 -- read before each via-C compilation. The advantage of having these
2133 -- in a separate file is that the file can be created at install-time
2134 -- depending on the available gcc version, and even re-generated later
2135 -- if gcc is upgraded.
2137 -- The options below are not dependent on the version of gcc, only the
2140 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2141 [String]) -- for registerised HC compilations
2142 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2143 in (cCcOpts ++ flagsAll, flagsRegHc)
2145 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2146 [String]) -- for registerised HC compilations
2147 machdepCCOpts' _dflags
2148 #if alpha_TARGET_ARCH
2150 #ifdef HAVE_THREADED_RTS_SUPPORT
2154 -- For now, to suppress the gcc warning "call-clobbered
2155 -- register used for global register variable", we simply
2156 -- disable all warnings altogether using the -w flag. Oh well.
2158 #elif hppa_TARGET_ARCH
2159 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2160 -- (very nice, but too bad the HP /usr/include files don't agree.)
2161 = ( ["-D_HPUX_SOURCE"], [] )
2163 #elif m68k_TARGET_ARCH
2164 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2165 -- popping of args to routines to be explicit; if we let things
2166 -- be deferred 'til after an STGJUMP, imminent death is certain!
2168 -- -fomit-frame-pointer : *don't*
2169 -- It's better to have a6 completely tied up being a frame pointer
2170 -- rather than let GCC pick random things to do with it.
2171 -- (If we want to steal a6, then we would try to do things
2172 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2173 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2175 #elif i386_TARGET_ARCH
2176 -- -fno-defer-pop : basically the same game as for m68k
2178 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2179 -- the fp (%ebp) for our register maps.
2180 = let n_regs = stolen_x86_regs _dflags
2183 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2186 "-fomit-frame-pointer",
2187 -- we want -fno-builtin, because when gcc inlines
2188 -- built-in functions like memcpy() it tends to
2189 -- run out of registers, requiring -monly-n-regs
2191 "-DSTOLEN_X86_REGS="++show n_regs ]
2194 #elif ia64_TARGET_ARCH
2195 = ( [], ["-fomit-frame-pointer", "-G0"] )
2197 #elif x86_64_TARGET_ARCH
2200 ["-fomit-frame-pointer",
2201 "-fno-asynchronous-unwind-tables",
2202 -- the unwind tables are unnecessary for HC code,
2203 -- and get in the way of -split-objs. Another option
2204 -- would be to throw them away in the mangler, but this
2207 -- calling builtins like strlen() using the FFI can
2208 -- cause gcc to run out of regs, so use the external
2212 #elif sparc_TARGET_ARCH
2214 -- For now, to suppress the gcc warning "call-clobbered
2215 -- register used for global register variable", we simply
2216 -- disable all warnings altogether using the -w flag. Oh well.
2218 #elif powerpc_apple_darwin_TARGET
2220 -- Disable Apple's precompiling preprocessor. It's a great thing
2221 -- for "normal" programs, but it doesn't support register variable
2223 = ( [], ["-no-cpp-precomp"] )
2228 picCCOpts :: DynFlags -> [String]
2230 #if darwin_TARGET_OS
2231 -- Apple prefers to do things the other way round.
2232 -- PIC is on by default.
2233 -- -mdynamic-no-pic:
2234 -- Turn off PIC code generation.
2236 -- Don't generate "common" symbols - these are unwanted
2237 -- in dynamic libraries.
2240 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2242 = ["-mdynamic-no-pic"]
2243 #elif mingw32_TARGET_OS
2244 -- no -fPIC for Windows
2246 = ["-U __PIC__","-D__PIC__"]
2250 -- we need -fPIC for C files when we are compiling with -dynamic,
2251 -- otherwise things like stub.c files don't get compiled
2252 -- correctly. They need to reference data in the Haskell
2253 -- objects, but can't without -fPIC. See
2254 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2255 | opt_PIC || not opt_Static
2256 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2261 -- -----------------------------------------------------------------------------
2265 can_split = cSplitObjs == "YES"
2267 -- -----------------------------------------------------------------------------
2270 data Printable = String String
2271 | FromDynFlags (DynFlags -> String)
2273 compilerInfo :: [(String, Printable)]
2274 compilerInfo = [("Project name", String cProjectName),
2275 ("Project version", String cProjectVersion),
2276 ("Booter version", String cBooterVersion),
2277 ("Stage", String cStage),
2278 ("Build platform", String cBuildPlatform),
2279 ("Host platform", String cHostPlatform),
2280 ("Target platform", String cTargetPlatform),
2281 ("Have interpreter", String cGhcWithInterpreter),
2282 ("Object splitting", String cSplitObjs),
2283 ("Have native code generator", String cGhcWithNativeCodeGen),
2284 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2285 ("Support SMP", String cGhcWithSMP),
2286 ("Unregisterised", String cGhcUnregisterised),
2287 ("Tables next to code", String cGhcEnableTablesNextToCode),
2288 ("RTS ways", String cGhcRTSWays),
2289 ("Leading underscore", String cLeadingUnderscore),
2290 ("Debug on", String (show debugIsOn)),
2291 ("LibDir", FromDynFlags topDir),
2292 ("Global Package DB", FromDynFlags systemPackageConfig)