2 -- Temporary, until rtsIsProfiled is fixed
8 -- (c) The University of Glasgow 2005
11 -- Most flags are dynamic flags, which means they can change from
12 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
13 -- multi-session GHC each session can be using different dynamic
14 -- flags. Dynamic flags can also be set at the prompt in GHCi.
16 -- * Dynamic flags and associated configuration types
20 flattenExtensionFlags,
21 ensureFlattenedExtensionFlags,
32 HscTarget(..), isObjectTarget, defaultObjectTarget,
33 GhcMode(..), isOneShot,
34 GhcLink(..), isNoLink,
38 fFlags, fLangFlags, xFlags,
42 -- ** Manipulating DynFlags
43 defaultDynFlags, -- DynFlags
44 initDynFlags, -- DynFlags -> IO DynFlags
46 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
53 -- ** Parsing DynFlags
55 parseDynamicNoPackageFlags,
58 supportedLanguagesAndExtensions,
60 -- ** DynFlag C compiler options
61 machdepCCOpts, picCCOpts,
63 -- * Configuration of the stg-to-stg passes
67 -- * Compiler configuration suitable for display to the user
71 -- Only in stage 2 can we be sure that the RTS
72 -- exposes the appropriate runtime boolean
77 #include "HsVersions.h"
79 #ifndef OMIT_NATIVE_CODEGEN
84 import PrelNames ( mAIN )
86 import {-# SOURCE #-} Packages (PackageState)
87 import DriverPhases ( Phase(..), phaseInputExt )
90 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
93 import Maybes ( orElse )
97 import Foreign.C ( CInt )
98 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
100 import System.IO.Unsafe ( unsafePerformIO )
102 import Control.Monad ( when )
106 import Data.Map (Map)
107 import qualified Data.Map as Map
108 import System.FilePath
109 import System.IO ( stderr, hPutChar )
111 -- -----------------------------------------------------------------------------
114 -- | Enumerates the simple on-or-off dynamic flags
120 | Opt_D_dump_cmmz_pretty
124 | Opt_D_dump_asm_native
125 | Opt_D_dump_asm_liveness
126 | Opt_D_dump_asm_coalesce
127 | Opt_D_dump_asm_regalloc
128 | Opt_D_dump_asm_regalloc_stages
129 | Opt_D_dump_asm_conflicts
130 | Opt_D_dump_asm_stats
131 | Opt_D_dump_asm_expanded
138 | Opt_D_dump_inlinings
139 | Opt_D_dump_rule_firings
140 | Opt_D_dump_occur_anal
144 | Opt_D_dump_simpl_iterations
145 | Opt_D_dump_simpl_phases
154 | Opt_D_dump_worker_wrapper
155 | Opt_D_dump_rn_trace
156 | Opt_D_dump_rn_stats
158 | Opt_D_dump_simpl_stats
159 | Opt_D_dump_tc_trace
160 | Opt_D_dump_if_trace
167 | Opt_D_verbose_core2core
168 | Opt_D_verbose_stg2stg
170 | Opt_D_dump_hi_diffs
171 | Opt_D_dump_minimal_imports
172 | Opt_D_dump_mod_cycles
173 | Opt_D_dump_view_pattern_commoning
174 | Opt_D_faststring_stats
175 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
176 | Opt_D_no_debug_output
182 | Opt_WarnIsError -- -Werror; makes warnings fatal
183 | Opt_WarnDuplicateExports
185 | Opt_WarnImplicitPrelude
186 | Opt_WarnIncompletePatterns
187 | Opt_WarnIncompletePatternsRecUpd
188 | Opt_WarnMissingFields
189 | Opt_WarnMissingImportList
190 | Opt_WarnMissingMethods
191 | Opt_WarnMissingSigs
192 | Opt_WarnMissingLocalSigs
193 | Opt_WarnNameShadowing
194 | Opt_WarnOverlappingPatterns
195 | Opt_WarnTypeDefaults
196 | Opt_WarnMonomorphism
197 | Opt_WarnUnusedBinds
198 | Opt_WarnUnusedImports
199 | Opt_WarnUnusedMatches
200 | Opt_WarnWarningsDeprecations
201 | Opt_WarnDeprecatedFlags
202 | Opt_WarnDodgyExports
203 | Opt_WarnDodgyImports
206 | Opt_WarnUnrecognisedPragmas
207 | Opt_WarnDodgyForeignImports
208 | Opt_WarnLazyUnliftedBindings
209 | Opt_WarnUnusedDoBind
210 | Opt_WarnWrongDoBind
211 | Opt_WarnAlternativeLayoutRuleTransitional
213 | Opt_PrintExplicitForalls
220 | Opt_StaticArgumentTransformation
224 | Opt_DoLambdaEtaExpansion
228 | Opt_UnboxStrictFields
231 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
233 | Opt_RegsGraph -- do graph coloring register allocation
234 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
237 | Opt_IgnoreInterfacePragmas
238 | Opt_OmitInterfacePragmas
239 | Opt_ExposeAllUnfoldings
242 | Opt_AutoSccsOnAllToplevs
243 | Opt_AutoSccsOnExportedToplevs
244 | Opt_AutoSccsOnIndividualCafs
251 | Opt_ExcessPrecision
252 | Opt_EagerBlackHoling
253 | Opt_ReadUserPackageConf
257 | Opt_HideAllPackages
258 | Opt_PrintBindResult
262 | Opt_BreakOnException
264 | Opt_PrintEvldWithShow
265 | Opt_PrintBindContents
268 | Opt_EmitExternalCore
270 | 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
327 | Opt_StandaloneDeriving
328 | Opt_DeriveDataTypeable
330 | Opt_DeriveTraversable
333 | Opt_TypeSynonymInstances
334 | Opt_FlexibleContexts
335 | Opt_FlexibleInstances
336 | Opt_ConstrainedClassMethods
337 | Opt_MultiParamTypeClasses
338 | Opt_FunctionalDependencies
340 | Opt_PolymorphicComponents
341 | Opt_ExistentialQuantification
345 | Opt_ParallelListComp
346 | Opt_TransformListComp
347 | Opt_GeneralizedNewtypeDeriving
350 | Opt_PostfixOperators
353 | Opt_LiberalTypeSynonyms
356 | Opt_ImpredicativeTypes
359 | Opt_NewQualifiedOperators
361 | Opt_AlternativeLayoutRule
362 | Opt_AlternativeLayoutRuleTransitional
363 | Opt_DatatypeContexts
366 -- | Contains not only a collection of 'DynFlag's but also a plethora of
367 -- information relating to the compilation of a single file or GHC session
368 data DynFlags = DynFlags {
371 hscTarget :: HscTarget,
372 hscOutName :: String, -- ^ Name of the output file
373 extCoreName :: String, -- ^ Name of the .hcr output file
374 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
375 optLevel :: Int, -- ^ Optimisation level
376 simplPhases :: Int, -- ^ Number of simplifier phases
377 maxSimplIterations :: Int, -- ^ Max simplifier iterations
378 shouldDumpSimplPhase :: Maybe String,
379 ruleCheck :: Maybe String,
380 strictnessBefore :: [Int], -- ^ Additional demand analysis
382 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
383 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
384 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
386 #ifndef OMIT_NATIVE_CODEGEN
387 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
389 stolen_x86_regs :: Int,
390 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
391 importPaths :: [FilePath],
393 mainFunIs :: Maybe String,
394 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
396 dphBackend :: DPHBackend,
398 thisPackage :: PackageId, -- ^ name of package currently being compiled
401 ways :: [Way], -- ^ Way flags from the command line
402 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
403 rtsBuildTag :: String, -- ^ The RTS \"way\"
405 -- For object splitting
406 splitInfo :: Maybe (String,Int),
409 objectDir :: Maybe String,
410 dylibInstallName :: Maybe String,
411 hiDir :: Maybe String,
412 stubDir :: Maybe String,
418 outputFile :: Maybe String,
419 outputHi :: Maybe String,
420 dynLibLoader :: DynLibLoader,
422 -- | This is set by 'DriverPipeline.runPipeline' based on where
423 -- its output is going.
424 dumpPrefix :: Maybe FilePath,
426 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
427 -- Set by @-ddump-file-prefix@
428 dumpPrefixForce :: Maybe FilePath,
430 includePaths :: [String],
431 libraryPaths :: [String],
432 frameworkPaths :: [String], -- used on darwin only
433 cmdlineFrameworks :: [String], -- ditto
434 tmpDir :: String, -- no trailing '/'
436 ghcUsagePath :: FilePath, -- Filled in by SysTools
437 ghciUsagePath :: FilePath, -- ditto
438 rtsOpts :: Maybe String,
439 rtsOptsEnabled :: RtsOptsEnabled,
441 hpcDir :: String, -- ^ Path to store the .mix files
443 -- options for particular phases
451 opt_windres :: [String],
452 opt_lo :: [String], -- LLVM: llvm optimiser
453 opt_lc :: [String], -- LLVM: llc static compiler
455 -- commands for particular phases
457 pgm_P :: (String,[Option]),
459 pgm_c :: (String,[Option]),
460 pgm_m :: (String,[Option]),
461 pgm_s :: (String,[Option]),
462 pgm_a :: (String,[Option]),
463 pgm_l :: (String,[Option]),
464 pgm_dll :: (String,[Option]),
466 pgm_sysman :: String,
467 pgm_windres :: String,
468 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
469 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
472 depMakefile :: FilePath,
473 depIncludePkgDeps :: Bool,
474 depExcludeMods :: [ModuleName],
475 depSuffixes :: [String],
478 extraPkgConfs :: [FilePath],
479 topDir :: FilePath, -- filled in by SysTools
480 systemPackageConfig :: FilePath, -- ditto
481 -- ^ The @-package-conf@ flags given on the command line, in the order
484 packageFlags :: [PackageFlag],
485 -- ^ The @-package@ and @-hide-package@ flags from the command-line
488 -- NB. do not modify this field, it is calculated by
489 -- Packages.initPackages and Packages.updatePackages.
490 pkgDatabase :: Maybe [PackageConfig],
491 pkgState :: PackageState,
494 -- These have to be IORefs, because the defaultCleanupHandler needs to
495 -- know what to clean when an exception happens
496 filesToClean :: IORef [FilePath],
497 dirsToClean :: IORef (Map FilePath FilePath),
501 language :: Maybe Language,
502 extensionFlags :: Either [OnOff ExtensionFlag]
505 -- | Message output action: use "ErrUtils" instead of this if you can
506 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
508 haddockOptions :: Maybe String
511 wayNames :: DynFlags -> [WayName]
512 wayNames = map wayName . ways
514 -- | The target code type of the compilation (if any).
516 -- Whenever you change the target, also make sure to set 'ghcLink' to
517 -- something sensible.
519 -- 'HscNothing' can be used to avoid generating any output, however, note
522 -- * This will not run the desugaring step, thus no warnings generated in
523 -- this step will be output. In particular, this includes warnings related
524 -- to pattern matching. You can run the desugarer manually using
525 -- 'GHC.desugarModule'.
527 -- * If a program uses Template Haskell the typechecker may try to run code
528 -- from an imported module. This will fail if no code has been generated
529 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
530 -- whether this might be the case and choose to either switch to a
531 -- different target or avoid typechecking such modules. (The latter may
532 -- preferable for security reasons.)
535 = HscC -- ^ Generate C code.
536 | HscAsm -- ^ Generate assembly using the native code generator.
537 | HscLlvm -- ^ Generate assembly using the llvm code generator.
538 | HscJava -- ^ Generate Java bytecode.
539 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
540 | HscNothing -- ^ Don't generate any code. See notes above.
543 -- | Will this target result in an object file on the disk?
544 isObjectTarget :: HscTarget -> Bool
545 isObjectTarget HscC = True
546 isObjectTarget HscAsm = True
547 isObjectTarget HscLlvm = True
548 isObjectTarget _ = False
550 -- | The 'GhcMode' tells us whether we're doing multi-module
551 -- compilation (controlled via the "GHC" API) or one-shot
552 -- (single-module) compilation. This makes a difference primarily to
553 -- the "Finder": in one-shot mode we look for interface files for
554 -- imported modules, but in multi-module mode we look for source files
555 -- in order to check whether they need to be recompiled.
557 = CompManager -- ^ @\-\-make@, GHCi, etc.
558 | OneShot -- ^ @ghc -c Foo.hs@
559 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
562 instance Outputable GhcMode where
563 ppr CompManager = ptext (sLit "CompManager")
564 ppr OneShot = ptext (sLit "OneShot")
565 ppr MkDepend = ptext (sLit "MkDepend")
567 isOneShot :: GhcMode -> Bool
568 isOneShot OneShot = True
569 isOneShot _other = False
571 -- | What to do in the link step, if there is one.
573 = NoLink -- ^ Don't link at all
574 | LinkBinary -- ^ Link object code into a binary
575 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
576 -- bytecode and object code).
577 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
580 isNoLink :: GhcLink -> Bool
581 isNoLink NoLink = True
584 -- Is it worth evaluating this Bool and caching it in the DynFlags value
585 -- during initDynFlags?
586 doingTickyProfiling :: DynFlags -> Bool
587 doingTickyProfiling _ = opt_Ticky
588 -- XXX -ticky is a static flag, because it implies -debug which is also
589 -- static. If the way flags were made dynamic, we could fix this.
592 = ExposePackage String
593 | ExposePackageId String
595 | IgnorePackage String
598 defaultHscTarget :: HscTarget
599 defaultHscTarget = defaultObjectTarget
601 -- | The 'HscTarget' value corresponding to the default way to create
602 -- object files on the current platform.
603 defaultObjectTarget :: HscTarget
605 | cGhcWithNativeCodeGen == "YES" = HscAsm
613 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
615 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
616 initDynFlags :: DynFlags -> IO DynFlags
617 initDynFlags dflags = do
618 -- someday these will be dynamic flags
619 ways <- readIORef v_Ways
620 refFilesToClean <- newIORef []
621 refDirsToClean <- newIORef Map.empty
624 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
625 rtsBuildTag = mkBuildTag ways,
626 filesToClean = refFilesToClean,
627 dirsToClean = refDirsToClean
630 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
631 -- and must be fully initialized by 'GHC.newSession' first.
632 defaultDynFlags :: DynFlags
635 ghcMode = CompManager,
636 ghcLink = LinkBinary,
637 hscTarget = defaultHscTarget,
643 maxSimplIterations = 4,
644 shouldDumpSimplPhase = Nothing,
646 specConstrThreshold = Just 200,
647 specConstrCount = Just 3,
648 liberateCaseThreshold = Just 200,
649 strictnessBefore = [],
651 #ifndef OMIT_NATIVE_CODEGEN
652 targetPlatform = defaultTargetPlatform,
655 cmdlineHcIncludes = [],
659 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
663 thisPackage = mainPackageId,
666 dylibInstallName = Nothing,
670 objectSuf = phaseInputExt StopLn,
671 hcSuf = phaseInputExt HCc,
674 outputFile = Nothing,
676 dynLibLoader = SystemDependent,
677 dumpPrefix = Nothing,
678 dumpPrefixForce = Nothing,
682 cmdlineFrameworks = [],
683 tmpDir = cDEFAULT_TMPDIR,
685 rtsOptsEnabled = RtsOptsSafeOnly,
691 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
704 pkgDatabase = Nothing,
705 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
706 ways = panic "defaultDynFlags: No ways",
707 buildTag = panic "defaultDynFlags: No buildTag",
708 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
710 -- initSysTools fills all these in
711 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
712 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
713 topDir = panic "defaultDynFlags: No topDir",
714 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
715 pgm_L = panic "defaultDynFlags: No pgm_L",
716 pgm_P = panic "defaultDynFlags: No pgm_P",
717 pgm_F = panic "defaultDynFlags: No pgm_F",
718 pgm_c = panic "defaultDynFlags: No pgm_c",
719 pgm_m = panic "defaultDynFlags: No pgm_m",
720 pgm_s = panic "defaultDynFlags: No pgm_s",
721 pgm_a = panic "defaultDynFlags: No pgm_a",
722 pgm_l = panic "defaultDynFlags: No pgm_l",
723 pgm_dll = panic "defaultDynFlags: No pgm_dll",
724 pgm_T = panic "defaultDynFlags: No pgm_T",
725 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
726 pgm_windres = panic "defaultDynFlags: No pgm_windres",
727 pgm_lo = panic "defaultDynFlags: No pgm_lo",
728 pgm_lc = panic "defaultDynFlags: No pgm_lc",
729 -- end of initSysTools values
731 depMakefile = "Makefile",
732 depIncludePkgDeps = False,
735 -- end of ghc -M values
736 filesToClean = panic "defaultDynFlags: No filesToClean",
737 dirsToClean = panic "defaultDynFlags: No dirsToClean",
738 haddockOptions = Nothing,
739 flags = defaultFlags,
741 extensionFlags = Left [],
743 log_action = \severity srcSpan style msg ->
745 SevOutput -> printOutput (msg style)
746 SevInfo -> printErrs (msg style)
747 SevFatal -> printErrs (msg style)
750 printErrs ((mkLocMessage srcSpan msg) style)
751 -- careful (#2302): printErrs prints in UTF-8, whereas
752 -- converting to string first and using hPutStr would
753 -- just emit the low 8 bits of each unicode char.
757 Note [Verbosity levels]
758 ~~~~~~~~~~~~~~~~~~~~~~~
759 0 | print errors & warnings only
760 1 | minimal verbosity: print "compiling M ... done." for each module.
761 2 | equivalent to -dshow-passes
762 3 | equivalent to existing "ghc -v"
763 4 | "ghc -v -ddump-most"
764 5 | "ghc -v -ddump-all"
770 flattenExtensionFlags :: DynFlags -> DynFlags
771 flattenExtensionFlags dflags
772 = case extensionFlags dflags of
775 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
778 panic "Flattening already-flattened extension flags"
780 ensureFlattenedExtensionFlags :: DynFlags -> DynFlags
781 ensureFlattenedExtensionFlags dflags
782 = case extensionFlags dflags of
785 extensionFlags = Right $ flattenExtensionFlags' (language dflags) onoffs
790 -- OnOffs accumulate in reverse order, so we use foldr in order to
791 -- process them in the right order
792 flattenExtensionFlags' :: Maybe Language -> [OnOff ExtensionFlag]
794 flattenExtensionFlags' ml = foldr f defaultExtensionFlags
795 where f (On f) flags = f : delete f flags
796 f (Off f) flags = delete f flags
797 defaultExtensionFlags = languageExtensions ml
799 languageExtensions :: Maybe Language -> [ExtensionFlag]
800 languageExtensions Nothing
801 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
802 -- behaviour the default, to see if anyone notices
804 -- In due course I'd like Opt_MonoLocalBinds to be on by default
805 -- But NB it's implied by GADTs etc
806 -- SLPJ September 2010
807 : languageExtensions (Just Haskell2010)
808 languageExtensions (Just Haskell98)
809 = [Opt_ImplicitPrelude,
810 Opt_MonomorphismRestriction,
812 Opt_DatatypeContexts]
813 languageExtensions (Just Haskell2010)
814 = [Opt_ImplicitPrelude,
815 Opt_MonomorphismRestriction,
816 Opt_DatatypeContexts,
818 Opt_ForeignFunctionInterface,
823 -- | Test whether a 'DynFlag' is set
824 dopt :: DynFlag -> DynFlags -> Bool
825 dopt f dflags = f `elem` (flags dflags)
828 dopt_set :: DynFlags -> DynFlag -> DynFlags
829 dopt_set dfs f = dfs{ flags = f : flags dfs }
831 -- | Unset a 'DynFlag'
832 dopt_unset :: DynFlags -> DynFlag -> DynFlags
833 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
835 -- | Test whether a 'ExtensionFlag' is set
836 xopt :: ExtensionFlag -> DynFlags -> Bool
837 xopt f dflags = case extensionFlags dflags of
838 Left _ -> panic ("Testing for extension flag " ++ show f ++ " before flattening")
839 Right flags -> f `elem` flags
841 -- | Set a 'ExtensionFlag'
842 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
843 xopt_set dfs f = case extensionFlags dfs of
844 Left onoffs -> dfs { extensionFlags = Left (On f : onoffs) }
845 Right _ -> panic ("Setting extension flag " ++ show f ++ " after flattening")
847 -- | Set a 'ExtensionFlag'
848 xopt_set_flattened :: DynFlags -> ExtensionFlag -> DynFlags
849 xopt_set_flattened dfs f = case extensionFlags dfs of
851 panic ("Setting extension flag " ++ show f ++ " before flattening, but expected flattened")
853 dfs { extensionFlags = Right (f : delete f flags) }
855 -- | Unset a 'ExtensionFlag'
856 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
857 xopt_unset dfs f = case extensionFlags dfs of
858 Left onoffs -> dfs { extensionFlags = Left (Off f : onoffs) }
859 Right _ -> panic ("Unsetting extension flag " ++ show f ++ " after flattening")
861 -- | Unset a 'ExtensionFlag'
862 xopt_unset_flattened :: DynFlags -> ExtensionFlag -> DynFlags
863 xopt_unset_flattened dfs f = case extensionFlags dfs of
865 panic ("Unsetting extension flag " ++ show f ++ " before flattening, but expected flattened")
867 dfs { extensionFlags = Right (delete f flags) }
869 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
870 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
871 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
872 -> [a] -- ^ Correctly ordered extracted options
873 getOpts dflags opts = reverse (opts dflags)
874 -- We add to the options from the front, so we need to reverse the list
876 -- | Gets the verbosity flag for the current verbosity level. This is fed to
877 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
878 getVerbFlag :: DynFlags -> String
880 | verbosity dflags >= 3 = "-v"
883 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
884 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
885 setPgmP, addOptl, addOptP,
886 addCmdlineFramework, addHaddockOpts
887 :: String -> DynFlags -> DynFlags
888 setOutputFile, setOutputHi, setDumpPrefixForce
889 :: Maybe String -> DynFlags -> DynFlags
891 setObjectDir f d = d{ objectDir = Just f}
892 setHiDir f d = d{ hiDir = Just f}
893 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
894 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
895 -- \#included from the .hc file when compiling with -fvia-C.
896 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
897 setDylibInstallName f d = d{ dylibInstallName = Just f}
899 setObjectSuf f d = d{ objectSuf = f}
900 setHiSuf f d = d{ hiSuf = f}
901 setHcSuf f d = d{ hcSuf = f}
903 setOutputFile f d = d{ outputFile = f}
904 setOutputHi f d = d{ outputHi = f}
906 parseDynLibLoaderMode f d =
908 ("deploy", "") -> d{ dynLibLoader = Deployable }
909 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
910 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
912 setDumpPrefixForce f d = d { dumpPrefixForce = f}
914 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
915 -- Config.hs should really use Option.
916 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
917 addOptl f d = d{ opt_l = f : opt_l d}
918 addOptP f d = d{ opt_P = f : opt_P d}
921 setDepMakefile :: FilePath -> DynFlags -> DynFlags
922 setDepMakefile f d = d { depMakefile = deOptDep f }
924 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
925 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
927 addDepExcludeMod :: String -> DynFlags -> DynFlags
929 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
931 addDepSuffix :: FilePath -> DynFlags -> DynFlags
932 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
935 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
936 -- we need to strip the "-optdep" off of the arg
937 deOptDep :: String -> String
938 deOptDep x = case stripPrefix "-optdep" x of
942 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
944 addHaddockOpts f d = d{ haddockOptions = Just f}
946 -- -----------------------------------------------------------------------------
947 -- Command-line options
949 -- | When invoking external tools as part of the compilation pipeline, we
950 -- pass these a sequence of options on the command-line. Rather than
951 -- just using a list of Strings, we use a type that allows us to distinguish
952 -- between filepaths and 'other stuff'. The reason for this is that
953 -- this type gives us a handle on transforming filenames, and filenames only,
954 -- to whatever format they're expected to be on a particular platform.
956 = FileOption -- an entry that _contains_ filename(s) / filepaths.
957 String -- a non-filepath prefix that shouldn't be
958 -- transformed (e.g., "/out=")
959 String -- the filepath/filename portion
962 showOpt :: Option -> String
963 showOpt (FileOption pre f) = pre ++ f
964 showOpt (Option s) = s
966 -----------------------------------------------------------------------------
967 -- Setting the optimisation level
969 updOptLevel :: Int -> DynFlags -> DynFlags
970 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
972 = dfs2{ optLevel = final_n }
974 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
975 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
976 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
978 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
979 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
981 -- -----------------------------------------------------------------------------
982 -- StgToDo: abstraction of stg-to-stg passes to run.
985 = StgDoMassageForProfiling -- should be (next to) last
986 -- There's also setStgVarInfo, but its absolute "lastness"
987 -- is so critical that it is hardwired in (no flag).
990 getStgToDo :: DynFlags -> [StgToDo]
994 stg_stats = dopt Opt_StgStats dflags
996 todo1 = if stg_stats then [D_stg_stats] else []
998 todo2 | WayProf `elem` wayNames dflags
999 = StgDoMassageForProfiling : todo1
1003 {- **********************************************************************
1007 %********************************************************************* -}
1009 -- -----------------------------------------------------------------------------
1010 -- Parsing the dynamic flags.
1012 -- | Parse dynamic flags from a list of command line arguments. Returns the
1013 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1014 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1015 -- flags or missing arguments).
1016 parseDynamicFlags :: Monad m =>
1017 DynFlags -> [Located String]
1018 -> m (DynFlags, [Located String], [Located String])
1019 -- ^ Updated 'DynFlags', left-over arguments, and
1020 -- list of warnings.
1021 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1023 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1024 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1025 parseDynamicNoPackageFlags :: Monad m =>
1026 DynFlags -> [Located String]
1027 -> m (DynFlags, [Located String], [Located String])
1028 -- ^ Updated 'DynFlags', left-over arguments, and
1029 -- list of warnings.
1030 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1032 parseDynamicFlags_ :: Monad m =>
1033 DynFlags -> [Located String] -> Bool
1034 -> m (DynFlags, [Located String], [Located String])
1035 parseDynamicFlags_ dflags0 args pkg_flags = do
1036 -- XXX Legacy support code
1037 -- We used to accept things like
1038 -- optdep-f -optdepdepend
1039 -- optdep-f -optdep depend
1040 -- optdep -f -optdepdepend
1041 -- optdep -f -optdep depend
1042 -- but the spaces trip up proper argument handling. So get rid of them.
1043 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1044 f (x : xs) = x : f xs
1048 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1049 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1050 | otherwise = dynamic_flags
1052 let ((leftover, errs, warns), dflags1)
1053 = runCmdLine (processArgs flag_spec args') dflags0
1054 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1056 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1057 -- isn't up to the job. We know that if hscTarget == HscC, then the
1058 -- user has explicitly used -fvia-C, because -fasm is the default,
1059 -- unless there is no NCG on this platform. The latter case is
1060 -- checked when the -fPIC flag is parsed.
1062 let (pic_warns, dflags2)
1063 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1064 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1065 dflags1{ hscTarget = HscAsm })
1066 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1067 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1068 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1069 ++ "dynamic on this platform;\n ignoring -fllvm"],
1070 dflags1{ hscTarget = HscAsm })
1072 | otherwise = ([], dflags1)
1074 return (dflags2, leftover, pic_warns ++ warns)
1077 {- **********************************************************************
1079 DynFlags specifications
1081 %********************************************************************* -}
1083 allFlags :: [String]
1084 allFlags = map ('-':) $
1085 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1086 map ("fno-"++) flags ++
1087 map ("f"++) flags ++
1088 map ("f"++) flags' ++
1089 map ("X"++) supportedExtensions
1090 where ok (PrefixPred _ _) = False
1092 flags = [ name | (name, _, _) <- fFlags ]
1093 flags' = [ name | (name, _, _) <- fLangFlags ]
1095 --------------- The main flags themselves ------------------
1096 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1098 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1099 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1100 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1102 (HasArg (\s -> do { addCmdlineHCInclude s
1103 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1104 , Flag "v" (OptIntSuffix setVerbosity)
1106 ------- Specific phases --------------------------------------------
1107 -- need to appear before -pgmL to be parsed as LLVM flags.
1108 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1109 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1110 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1111 , Flag "pgmP" (hasArg setPgmP)
1112 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1113 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1114 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1115 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1116 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1117 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1118 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1119 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1121 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1122 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1123 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1124 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1125 , Flag "optP" (hasArg addOptP)
1126 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1127 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1128 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1129 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1130 , Flag "optl" (hasArg addOptl)
1131 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1134 (NoArg (if can_split
1135 then setDynFlag Opt_SplitObjs
1136 else addWarn "ignoring -fsplit-objs"))
1138 -------- ghc -M -----------------------------------------------------
1139 , Flag "dep-suffix" (hasArg addDepSuffix)
1140 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1141 , Flag "dep-makefile" (hasArg setDepMakefile)
1142 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1143 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1144 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1145 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1146 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1147 , Flag "exclude-module" (hasArg addDepExcludeMod)
1148 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1149 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1151 -------- Linking ----------------------------------------------------
1152 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1153 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1154 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1155 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1157 ------- Libraries ---------------------------------------------------
1158 , Flag "L" (Prefix addLibraryPath)
1159 , Flag "l" (AnySuffix (upd . addOptl))
1161 ------- Frameworks --------------------------------------------------
1162 -- -framework-path should really be -F ...
1163 , Flag "framework-path" (HasArg addFrameworkPath)
1164 , Flag "framework" (hasArg addCmdlineFramework)
1166 ------- Output Redirection ------------------------------------------
1167 , Flag "odir" (hasArg setObjectDir)
1168 , Flag "o" (SepArg (upd . setOutputFile . Just))
1169 , Flag "ohi" (hasArg (setOutputHi . Just ))
1170 , Flag "osuf" (hasArg setObjectSuf)
1171 , Flag "hcsuf" (hasArg setHcSuf)
1172 , Flag "hisuf" (hasArg setHiSuf)
1173 , Flag "hidir" (hasArg setHiDir)
1174 , Flag "tmpdir" (hasArg setTmpDir)
1175 , Flag "stubdir" (hasArg setStubDir)
1176 , Flag "outputdir" (hasArg setOutputDir)
1177 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1179 ------- Keeping temporary files -------------------------------------
1180 -- These can be singular (think ghc -c) or plural (think ghc --make)
1181 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1182 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1183 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1184 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1185 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1186 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1187 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1188 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1189 -- This only makes sense as plural
1190 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1192 ------- Miscellaneous ----------------------------------------------
1193 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1194 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1195 , Flag "with-rtsopts" (HasArg setRtsOpts)
1196 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1197 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1198 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1199 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1200 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1201 , Flag "main-is" (SepArg setMainIs)
1202 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1203 , Flag "haddock-opts" (hasArg addHaddockOpts)
1204 , Flag "hpcdir" (SepArg setOptHpcDir)
1206 ------- recompilation checker --------------------------------------
1207 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1208 ; deprecate "Use -fno-force-recomp instead" }))
1209 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1210 ; deprecate "Use -fforce-recomp instead" }))
1212 ------ HsCpp opts ---------------------------------------------------
1213 , Flag "D" (AnySuffix (upd . addOptP))
1214 , Flag "U" (AnySuffix (upd . addOptP))
1216 ------- Include/Import Paths ----------------------------------------
1217 , Flag "I" (Prefix addIncludePath)
1218 , Flag "i" (OptPrefix addImportPath)
1220 ------ Debugging ----------------------------------------------------
1221 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1223 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1224 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1225 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1226 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1227 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1228 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1229 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1230 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1231 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1232 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1233 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1234 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1235 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1236 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1237 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1238 ; setDumpFlag' Opt_D_dump_llvm}))
1239 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1240 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1241 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1242 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1243 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1244 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1245 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1246 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1247 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1248 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1249 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1250 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1251 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1252 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1253 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1254 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1255 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1256 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1257 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1258 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1259 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1260 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1261 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1262 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1263 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1264 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1265 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1266 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1267 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1268 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1269 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1270 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1271 ; setVerboseCore2Core }))
1272 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1273 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1274 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1275 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1276 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1277 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1278 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1279 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1280 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1281 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1282 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1283 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1284 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1285 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1286 , Flag "dshow-passes" (NoArg (do forceRecompile
1287 setVerbosity (Just 2)))
1288 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1290 ------ Machine dependant (-m<blah>) stuff ---------------------------
1292 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1293 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1294 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1295 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1297 ------ Warning opts -------------------------------------------------
1298 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1299 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1300 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1301 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1302 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1303 ; deprecate "Use -w instead" }))
1304 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1306 ------ Optimisation flags ------------------------------------------
1307 , Flag "O" (noArg (setOptLevel 1))
1308 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1309 , Flag "Odph" (noArg setDPHOpt)
1310 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1311 -- If the number is missing, use 1
1313 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1314 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1315 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1316 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1317 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1318 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1319 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1320 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1321 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1322 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1323 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1325 ------ Profiling ----------------------------------------------------
1327 -- XXX Should the -f* flags be deprecated?
1328 -- They don't seem to be documented
1329 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1330 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1331 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1332 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1333 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1334 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1335 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1336 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1337 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1339 ------ DPH flags ----------------------------------------------------
1341 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1342 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1343 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1345 ------ Compiler flags -----------------------------------------------
1347 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1348 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1349 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1350 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1351 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1352 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1354 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1355 setTarget HscNothing))
1356 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1357 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1358 , Flag "fglasgow-exts" (NoArg enableGlasgowExts)
1359 , Flag "fno-glasgow-exts" (NoArg disableGlasgowExts)
1361 ++ map (mkFlag True "f" setDynFlag ) fFlags
1362 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1363 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1364 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1365 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1366 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1367 ++ map (mkFlag True "X" setLanguage) languageFlags
1369 package_flags :: [Flag (CmdLineP DynFlags)]
1371 ------- Packages ----------------------------------------------------
1372 Flag "package-conf" (HasArg extraPkgConf_)
1373 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1374 , Flag "package-name" (hasArg setPackageName)
1375 , Flag "package-id" (HasArg exposePackageId)
1376 , Flag "package" (HasArg exposePackage)
1377 , Flag "hide-package" (HasArg hidePackage)
1378 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1379 , Flag "ignore-package" (HasArg ignorePackage)
1380 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1381 ; deprecate "Use -package instead" }))
1385 = ( String -- Flag in string form
1386 , flag -- Flag in internal form
1387 , Bool -> DynP ()) -- Extra action to run when the flag is found
1388 -- Typically, emit a warning or error
1389 -- True <=> we are turning the flag on
1390 -- False <=> we are turning the flag off
1393 mkFlag :: Bool -- ^ True <=> it should be turned on
1394 -> String -- ^ The flag prefix
1395 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1396 -> FlagSpec flag -- ^ Specification of this particular flag
1397 -> Flag (CmdLineP DynFlags)
1398 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1399 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1401 deprecatedForExtension :: String -> Bool -> DynP ()
1402 deprecatedForExtension lang turn_on
1403 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1405 flag | turn_on = lang
1406 | otherwise = "No"++lang
1408 useInstead :: String -> Bool -> DynP ()
1409 useInstead flag turn_on
1410 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1412 no = if turn_on then "" else "no-"
1414 nop :: Bool -> DynP ()
1417 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1418 fFlags :: [FlagSpec DynFlag]
1420 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1421 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1422 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1423 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1424 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1425 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1426 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1427 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1428 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1429 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1430 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1431 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1432 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1433 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1434 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1435 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1436 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1437 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1438 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1439 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1440 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1441 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1442 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1443 ( "warn-orphans", Opt_WarnOrphans, nop ),
1444 ( "warn-tabs", Opt_WarnTabs, nop ),
1445 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1446 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1447 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1448 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1449 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1450 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1451 ( "strictness", Opt_Strictness, nop ),
1452 ( "specialise", Opt_Specialise, nop ),
1453 ( "float-in", Opt_FloatIn, nop ),
1454 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1455 ( "full-laziness", Opt_FullLaziness, nop ),
1456 ( "liberate-case", Opt_LiberateCase, nop ),
1457 ( "spec-constr", Opt_SpecConstr, nop ),
1458 ( "cse", Opt_CSE, nop ),
1459 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1460 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1461 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1462 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1463 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1464 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1465 ( "case-merge", Opt_CaseMerge, nop ),
1466 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1467 ( "method-sharing", Opt_MethodSharing, nop ),
1468 ( "dicts-cheap", Opt_DictsCheap, nop ),
1469 ( "excess-precision", Opt_ExcessPrecision, nop ),
1470 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1471 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1472 ( "print-bind-result", Opt_PrintBindResult, nop ),
1473 ( "force-recomp", Opt_ForceRecomp, nop ),
1474 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1475 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1476 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1477 ( "break-on-exception", Opt_BreakOnException, nop ),
1478 ( "break-on-error", Opt_BreakOnError, nop ),
1479 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1480 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1481 ( "run-cps", Opt_RunCPS, nop ),
1482 ( "run-cpsz", Opt_RunCPSZ, nop ),
1483 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1484 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1485 ( "vectorise", Opt_Vectorise, nop ),
1486 ( "regs-graph", Opt_RegsGraph, nop ),
1487 ( "regs-iterative", Opt_RegsIterative, nop ),
1488 ( "gen-manifest", Opt_GenManifest, nop ),
1489 ( "embed-manifest", Opt_EmbedManifest, nop ),
1490 ( "ext-core", Opt_EmitExternalCore, nop ),
1491 ( "shared-implib", Opt_SharedImplib, nop ),
1492 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1493 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1496 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1497 fLangFlags :: [FlagSpec ExtensionFlag]
1499 ( "th", Opt_TemplateHaskell,
1500 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1501 ( "fi", Opt_ForeignFunctionInterface,
1502 deprecatedForExtension "ForeignFunctionInterface" ),
1503 ( "ffi", Opt_ForeignFunctionInterface,
1504 deprecatedForExtension "ForeignFunctionInterface" ),
1505 ( "arrows", Opt_Arrows,
1506 deprecatedForExtension "Arrows" ),
1507 ( "generics", Opt_Generics,
1508 deprecatedForExtension "Generics" ),
1509 ( "implicit-prelude", Opt_ImplicitPrelude,
1510 deprecatedForExtension "ImplicitPrelude" ),
1511 ( "bang-patterns", Opt_BangPatterns,
1512 deprecatedForExtension "BangPatterns" ),
1513 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1514 deprecatedForExtension "MonomorphismRestriction" ),
1515 ( "mono-pat-binds", Opt_MonoPatBinds,
1516 deprecatedForExtension "MonoPatBinds" ),
1517 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1518 deprecatedForExtension "ExtendedDefaultRules" ),
1519 ( "implicit-params", Opt_ImplicitParams,
1520 deprecatedForExtension "ImplicitParams" ),
1521 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1522 deprecatedForExtension "ScopedTypeVariables" ),
1524 deprecatedForExtension "PArr" ),
1525 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1526 deprecatedForExtension "OverlappingInstances" ),
1527 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1528 deprecatedForExtension "UndecidableInstances" ),
1529 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1530 deprecatedForExtension "IncoherentInstances" )
1533 supportedLanguages :: [String]
1534 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1536 supportedExtensions :: [String]
1537 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1539 supportedLanguagesAndExtensions :: [String]
1540 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1542 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1543 languageFlags :: [FlagSpec Language]
1545 ( "Haskell98", Haskell98, nop ),
1546 ( "Haskell2010", Haskell2010, nop )
1549 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1550 xFlags :: [FlagSpec ExtensionFlag]
1552 ( "CPP", Opt_Cpp, nop ),
1553 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1554 ( "TupleSections", Opt_TupleSections, nop ),
1555 ( "PatternGuards", Opt_PatternGuards, nop ),
1556 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1557 ( "MagicHash", Opt_MagicHash, nop ),
1558 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1559 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1560 ( "KindSignatures", Opt_KindSignatures, nop ),
1561 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1562 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1563 ( "TransformListComp", Opt_TransformListComp, nop ),
1564 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1565 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1566 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1567 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1568 ( "Rank2Types", Opt_Rank2Types, nop ),
1569 ( "RankNTypes", Opt_RankNTypes, nop ),
1570 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1571 ( "TypeOperators", Opt_TypeOperators, nop ),
1572 ( "RecursiveDo", Opt_RecursiveDo,
1573 deprecatedForExtension "DoRec"),
1574 ( "DoRec", Opt_DoRec, nop ),
1575 ( "Arrows", Opt_Arrows, nop ),
1576 ( "PArr", Opt_PArr, nop ),
1577 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1578 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1579 ( "Generics", Opt_Generics, nop ),
1580 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1581 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1582 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1583 ( "RecordPuns", Opt_RecordPuns,
1584 deprecatedForExtension "NamedFieldPuns" ),
1585 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1586 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1587 ( "GADTs", Opt_GADTs, nop ),
1588 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1589 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1590 ( "BangPatterns", Opt_BangPatterns, nop ),
1591 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1592 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1593 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, 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 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1600 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1601 \ turn_on -> if not turn_on
1602 then deprecate "You can't turn off RelaxedPolyRec any more"
1604 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1605 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1606 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1608 ( "PatternSignatures", Opt_ScopedTypeVariables,
1609 deprecatedForExtension "ScopedTypeVariables" ),
1611 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1612 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1613 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1614 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1615 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1616 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1617 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1618 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1619 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1620 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1621 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1622 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1623 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1624 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1625 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1626 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1627 ( "PackageImports", Opt_PackageImports, nop ),
1628 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1629 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1632 defaultFlags :: [DynFlag]
1634 = [ Opt_AutoLinkPackages,
1635 Opt_ReadUserPackageConf,
1645 Opt_PrintBindContents
1648 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1649 -- The default -O0 options
1653 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1655 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1656 , (Opt_Rank2Types, Opt_ExplicitForAll)
1657 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1658 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1659 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1660 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1662 , (Opt_GADTs, Opt_MonoLocalBinds)
1663 , (Opt_TypeFamilies, Opt_MonoLocalBinds)
1665 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1666 -- all over the place
1668 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1670 -- Record wild-cards implies field disambiguation
1671 -- Otherwise if you write (C {..}) you may well get
1672 -- stuff like " 'a' not in scope ", which is a bit silly
1673 -- if the compiler has just filled in field 'a' of constructor 'C'
1674 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1677 optLevelFlags :: [([Int], DynFlag)]
1679 = [ ([0], Opt_IgnoreInterfacePragmas)
1680 , ([0], Opt_OmitInterfacePragmas)
1682 , ([1,2], Opt_IgnoreAsserts)
1683 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1685 , ([1,2], Opt_DoEtaReduction)
1686 , ([1,2], Opt_CaseMerge)
1687 , ([1,2], Opt_Strictness)
1689 , ([1,2], Opt_FullLaziness)
1690 , ([1,2], Opt_Specialise)
1691 , ([1,2], Opt_FloatIn)
1693 , ([2], Opt_LiberateCase)
1694 , ([2], Opt_SpecConstr)
1695 , ([2], Opt_RegsGraph)
1697 -- , ([2], Opt_StaticArgumentTransformation)
1698 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1699 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1700 -- several improvements to the heuristics, and I'm concerned that without
1701 -- those changes SAT will interfere with some attempts to write "high
1702 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1703 -- this year. In particular, the version in HEAD lacks the tail call
1704 -- criterion, so many things that look like reasonable loops will be
1705 -- turned into functions with extra (unneccesary) thunk creation.
1707 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1708 -- This one is important for a tiresome reason:
1709 -- we want to make sure that the bindings for data
1710 -- constructors are eta-expanded. This is probably
1711 -- a good thing anyway, but it seems fragile.
1714 -- -----------------------------------------------------------------------------
1715 -- Standard sets of warning options
1717 standardWarnings :: [DynFlag]
1719 = [ Opt_WarnWarningsDeprecations,
1720 Opt_WarnDeprecatedFlags,
1721 Opt_WarnUnrecognisedPragmas,
1722 Opt_WarnOverlappingPatterns,
1723 Opt_WarnMissingFields,
1724 Opt_WarnMissingMethods,
1725 Opt_WarnDuplicateExports,
1726 Opt_WarnLazyUnliftedBindings,
1727 Opt_WarnDodgyForeignImports,
1728 Opt_WarnWrongDoBind,
1729 Opt_WarnAlternativeLayoutRuleTransitional
1732 minusWOpts :: [DynFlag]
1734 = standardWarnings ++
1735 [ Opt_WarnUnusedBinds,
1736 Opt_WarnUnusedMatches,
1737 Opt_WarnUnusedImports,
1738 Opt_WarnIncompletePatterns,
1739 Opt_WarnDodgyExports,
1740 Opt_WarnDodgyImports
1743 minusWallOpts :: [DynFlag]
1746 [ Opt_WarnTypeDefaults,
1747 Opt_WarnNameShadowing,
1748 Opt_WarnMissingSigs,
1751 Opt_WarnUnusedDoBind
1754 -- minuswRemovesOpts should be every warning option
1755 minuswRemovesOpts :: [DynFlag]
1758 [Opt_WarnImplicitPrelude,
1759 Opt_WarnIncompletePatternsRecUpd,
1760 Opt_WarnMonomorphism,
1761 Opt_WarnUnrecognisedPragmas,
1765 enableGlasgowExts :: DynP ()
1766 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1767 mapM_ setExtensionFlag glasgowExtsFlags
1769 disableGlasgowExts :: DynP ()
1770 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1771 mapM_ unSetExtensionFlag glasgowExtsFlags
1773 glasgowExtsFlags :: [ExtensionFlag]
1774 glasgowExtsFlags = [
1775 Opt_ForeignFunctionInterface
1776 , Opt_UnliftedFFITypes
1778 , Opt_ImplicitParams
1779 , Opt_ScopedTypeVariables
1781 , Opt_TypeSynonymInstances
1782 , Opt_StandaloneDeriving
1783 , Opt_DeriveDataTypeable
1785 , Opt_DeriveFoldable
1786 , Opt_DeriveTraversable
1787 , Opt_FlexibleContexts
1788 , Opt_FlexibleInstances
1789 , Opt_ConstrainedClassMethods
1790 , Opt_MultiParamTypeClasses
1791 , Opt_FunctionalDependencies
1793 , Opt_PolymorphicComponents
1794 , Opt_ExistentialQuantification
1796 , Opt_PostfixOperators
1798 , Opt_LiberalTypeSynonyms
1802 , Opt_ParallelListComp
1803 , Opt_EmptyDataDecls
1804 , Opt_KindSignatures
1805 , Opt_GeneralizedNewtypeDeriving
1806 , Opt_TypeFamilies ]
1809 -- Consult the RTS to find whether GHC itself has been built profiled
1810 -- If so, you can't use Template Haskell
1811 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1813 rtsIsProfiled :: Bool
1814 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1816 checkTemplateHaskellOk :: Bool -> DynP ()
1817 checkTemplateHaskellOk turn_on
1818 | turn_on && rtsIsProfiled
1819 = addErr "You can't use Template Haskell with a profiled compiler"
1823 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1824 -- so we simply say "ok". It doesn't matter because TH isn't
1825 -- available in stage 1 anyway.
1826 checkTemplateHaskellOk turn_on = return ()
1829 {- **********************************************************************
1831 DynFlags constructors
1833 %********************************************************************* -}
1835 type DynP = EwM (CmdLineP DynFlags)
1837 upd :: (DynFlags -> DynFlags) -> DynP ()
1838 upd f = liftEwM (do { dfs <- getCmdLineState
1839 ; putCmdLineState $! (f dfs) })
1841 --------------- Constructor functions for OptKind -----------------
1842 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1843 noArg fn = NoArg (upd fn)
1845 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1846 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1848 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1849 hasArg fn = HasArg (upd . fn)
1851 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1852 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1853 ; deprecate deprec })
1855 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1856 intSuffix fn = IntSuffix (\n -> upd (fn n))
1858 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1859 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1861 --------------------------
1862 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1863 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1864 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1866 --------------------------
1867 setLanguage :: Language -> DynP ()
1868 setLanguage l = upd (\dfs -> dfs { language = Just l })
1870 --------------------------
1871 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1872 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1873 ; mapM_ setExtensionFlag deps }
1875 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1876 -- When you set f, set the ones it implies
1877 -- NB: use setExtensionFlag recursively, in case the implied flags
1878 -- implies further flags
1879 -- When you un-set f, however, we don't un-set the things it implies
1880 -- (except for -fno-glasgow-exts, which is treated specially)
1882 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1884 --------------------------
1885 setDumpFlag' :: DynFlag -> DynP ()
1886 setDumpFlag' dump_flag
1887 = do { setDynFlag dump_flag
1888 ; when want_recomp forceRecompile }
1890 -- Certain dumpy-things are really interested in what's going
1891 -- on during recompilation checking, so in those cases we
1892 -- don't want to turn it off.
1893 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1894 Opt_D_dump_hi_diffs]
1896 forceRecompile :: DynP ()
1897 -- Whenver we -ddump, force recompilation (by switching off the
1898 -- recompilation checker), else you don't see the dump! However,
1899 -- don't switch it off in --make mode, else *everything* gets
1900 -- recompiled which probably isn't what you want
1901 forceRecompile = do { dfs <- liftEwM getCmdLineState
1902 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1904 force_recomp dfs = isOneShot (ghcMode dfs)
1906 setVerboseCore2Core :: DynP ()
1907 setVerboseCore2Core = do forceRecompile
1908 setDynFlag Opt_D_verbose_core2core
1909 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1912 setDumpSimplPhases :: String -> DynP ()
1913 setDumpSimplPhases s = do forceRecompile
1914 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1916 spec = case s of { ('=' : s') -> s'; _ -> s }
1918 setVerbosity :: Maybe Int -> DynP ()
1919 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1921 addCmdlineHCInclude :: String -> DynP ()
1922 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1924 extraPkgConf_ :: FilePath -> DynP ()
1925 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1927 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1929 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1931 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1933 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1935 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1937 setPackageName :: String -> DynFlags -> DynFlags
1938 setPackageName p s = s{ thisPackage = stringToPackageId p }
1940 -- If we're linking a binary, then only targets that produce object
1941 -- code are allowed (requests for other target types are ignored).
1942 setTarget :: HscTarget -> DynP ()
1943 setTarget l = upd set
1946 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1949 -- Changes the target only if we're compiling object code. This is
1950 -- used by -fasm and -fvia-C, which switch from one to the other, but
1951 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1952 -- can be safely used in an OPTIONS_GHC pragma.
1953 setObjTarget :: HscTarget -> DynP ()
1954 setObjTarget l = upd set
1957 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1960 setOptLevel :: Int -> DynFlags -> DynFlags
1961 setOptLevel n dflags
1962 | hscTarget dflags == HscInterpreted && n > 0
1964 -- not in IO any more, oh well:
1965 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1967 = updOptLevel n dflags
1970 -- -Odph is equivalent to
1972 -- -O2 optimise as much as possible
1973 -- -fno-method-sharing sharing specialisation defeats fusion
1975 -- -fdicts-cheap always inline dictionaries
1976 -- -fmax-simplifier-iterations20 this is necessary sometimes
1977 -- -fsimplifier-phases=3 we use an additional simplifier phase
1979 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1980 -- -fno-spec-constr-count SpecConstr as much as possible
1981 -- -finline-enough-args hack to prevent excessive inlining
1983 setDPHOpt :: DynFlags -> DynFlags
1984 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1986 , specConstrThreshold = Nothing
1987 , specConstrCount = Nothing
1989 `dopt_set` Opt_DictsCheap
1990 `dopt_unset` Opt_MethodSharing
1992 data DPHBackend = DPHPar
1995 deriving(Eq, Ord, Enum, Show)
1997 setDPHBackend :: DPHBackend -> DynP ()
1998 setDPHBackend backend
2000 upd $ \dflags -> dflags { dphBackend = backend }
2001 mapM_ exposePackage (dph_packages backend)
2003 dph_packages DPHThis = []
2004 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2005 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2007 dphPackage :: DynFlags -> PackageId
2008 dphPackage dflags = case dphBackend dflags of
2009 DPHPar -> dphParPackageId
2010 DPHSeq -> dphSeqPackageId
2011 DPHThis -> thisPackage dflags
2013 setMainIs :: String -> DynP ()
2015 | not (null main_fn) && isLower (head main_fn)
2016 -- The arg looked like "Foo.Bar.baz"
2017 = upd $ \d -> d{ mainFunIs = Just main_fn,
2018 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2020 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2021 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2023 | otherwise -- The arg looked like "baz"
2024 = upd $ \d -> d{ mainFunIs = Just arg }
2026 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2028 -----------------------------------------------------------------------------
2029 -- Paths & Libraries
2031 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2033 -- -i on its own deletes the import paths
2034 addImportPath "" = upd (\s -> s{importPaths = []})
2035 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2039 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2042 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2044 addFrameworkPath p =
2045 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2047 #ifndef mingw32_TARGET_OS
2048 split_marker :: Char
2049 split_marker = ':' -- not configurable (ToDo)
2052 splitPathList :: String -> [String]
2053 splitPathList s = filter notNull (splitUp s)
2054 -- empty paths are ignored: there might be a trailing
2055 -- ':' in the initial list, for example. Empty paths can
2056 -- cause confusion when they are translated into -I options
2057 -- for passing to gcc.
2059 #ifndef mingw32_TARGET_OS
2060 splitUp xs = split split_marker xs
2062 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2064 -- That is, if "foo:bar:baz" is used, this interpreted as
2065 -- consisting of three entries, 'foo', 'bar', 'baz'.
2066 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2067 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2069 -- Notice that no attempt is made to fully replace the 'standard'
2070 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2071 -- that this will cause too much breakage for users & ':' will
2072 -- work fine even with DOS paths, if you're not insisting on being silly.
2075 splitUp (x:':':div:xs) | div `elem` dir_markers
2076 = ((x:':':div:p): splitUp rs)
2078 (p,rs) = findNextPath xs
2079 -- we used to check for existence of the path here, but that
2080 -- required the IO monad to be threaded through the command-line
2081 -- parser which is quite inconvenient. The
2082 splitUp xs = cons p (splitUp rs)
2084 (p,rs) = findNextPath xs
2089 -- will be called either when we've consumed nought or the
2090 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2091 -- finding the next split marker.
2093 case break (`elem` split_markers) xs of
2094 (p, _:ds) -> (p, ds)
2097 split_markers :: [Char]
2098 split_markers = [':', ';']
2100 dir_markers :: [Char]
2101 dir_markers = ['/', '\\']
2104 -- -----------------------------------------------------------------------------
2105 -- tmpDir, where we store temporary files.
2107 setTmpDir :: FilePath -> DynFlags -> DynFlags
2108 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2109 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2110 -- seem necessary now --SDM 7/2/2008
2112 -----------------------------------------------------------------------------
2115 setRtsOpts :: String -> DynP ()
2116 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2118 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2119 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2121 -----------------------------------------------------------------------------
2124 setOptHpcDir :: String -> DynP ()
2125 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2127 -----------------------------------------------------------------------------
2128 -- Via-C compilation stuff
2130 -- There are some options that we need to pass to gcc when compiling
2131 -- Haskell code via C, but are only supported by recent versions of
2132 -- gcc. The configure script decides which of these options we need,
2133 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2134 -- read before each via-C compilation. The advantage of having these
2135 -- in a separate file is that the file can be created at install-time
2136 -- depending on the available gcc version, and even re-generated later
2137 -- if gcc is upgraded.
2139 -- The options below are not dependent on the version of gcc, only the
2142 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2143 [String]) -- for registerised HC compilations
2144 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2145 in (cCcOpts ++ flagsAll, flagsRegHc)
2147 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2148 [String]) -- for registerised HC compilations
2149 machdepCCOpts' _dflags
2150 #if alpha_TARGET_ARCH
2152 #ifdef HAVE_THREADED_RTS_SUPPORT
2156 -- For now, to suppress the gcc warning "call-clobbered
2157 -- register used for global register variable", we simply
2158 -- disable all warnings altogether using the -w flag. Oh well.
2160 #elif hppa_TARGET_ARCH
2161 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2162 -- (very nice, but too bad the HP /usr/include files don't agree.)
2163 = ( ["-D_HPUX_SOURCE"], [] )
2165 #elif m68k_TARGET_ARCH
2166 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2167 -- popping of args to routines to be explicit; if we let things
2168 -- be deferred 'til after an STGJUMP, imminent death is certain!
2170 -- -fomit-frame-pointer : *don't*
2171 -- It's better to have a6 completely tied up being a frame pointer
2172 -- rather than let GCC pick random things to do with it.
2173 -- (If we want to steal a6, then we would try to do things
2174 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2175 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2177 #elif i386_TARGET_ARCH
2178 -- -fno-defer-pop : basically the same game as for m68k
2180 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2181 -- the fp (%ebp) for our register maps.
2182 = let n_regs = stolen_x86_regs _dflags
2185 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2188 "-fomit-frame-pointer",
2189 -- we want -fno-builtin, because when gcc inlines
2190 -- built-in functions like memcpy() it tends to
2191 -- run out of registers, requiring -monly-n-regs
2193 "-DSTOLEN_X86_REGS="++show n_regs ]
2196 #elif ia64_TARGET_ARCH
2197 = ( [], ["-fomit-frame-pointer", "-G0"] )
2199 #elif x86_64_TARGET_ARCH
2202 ["-fomit-frame-pointer",
2203 "-fno-asynchronous-unwind-tables",
2204 -- the unwind tables are unnecessary for HC code,
2205 -- and get in the way of -split-objs. Another option
2206 -- would be to throw them away in the mangler, but this
2209 -- calling builtins like strlen() using the FFI can
2210 -- cause gcc to run out of regs, so use the external
2214 #elif sparc_TARGET_ARCH
2216 -- For now, to suppress the gcc warning "call-clobbered
2217 -- register used for global register variable", we simply
2218 -- disable all warnings altogether using the -w flag. Oh well.
2220 #elif powerpc_apple_darwin_TARGET
2222 -- Disable Apple's precompiling preprocessor. It's a great thing
2223 -- for "normal" programs, but it doesn't support register variable
2225 = ( [], ["-no-cpp-precomp"] )
2230 picCCOpts :: DynFlags -> [String]
2232 #if darwin_TARGET_OS
2233 -- Apple prefers to do things the other way round.
2234 -- PIC is on by default.
2235 -- -mdynamic-no-pic:
2236 -- Turn off PIC code generation.
2238 -- Don't generate "common" symbols - these are unwanted
2239 -- in dynamic libraries.
2242 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2244 = ["-mdynamic-no-pic"]
2245 #elif mingw32_TARGET_OS
2246 -- no -fPIC for Windows
2248 = ["-U __PIC__","-D__PIC__"]
2252 -- we need -fPIC for C files when we are compiling with -dynamic,
2253 -- otherwise things like stub.c files don't get compiled
2254 -- correctly. They need to reference data in the Haskell
2255 -- objects, but can't without -fPIC. See
2256 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2257 | opt_PIC || not opt_Static
2258 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2263 -- -----------------------------------------------------------------------------
2267 can_split = cSplitObjs == "YES"
2269 -- -----------------------------------------------------------------------------
2272 data Printable = String String
2273 | FromDynFlags (DynFlags -> String)
2275 compilerInfo :: [(String, Printable)]
2276 compilerInfo = [("Project name", String cProjectName),
2277 ("Project version", String cProjectVersion),
2278 ("Booter version", String cBooterVersion),
2279 ("Stage", String cStage),
2280 ("Build platform", String cBuildPlatform),
2281 ("Host platform", String cHostPlatform),
2282 ("Target platform", String cTargetPlatform),
2283 ("Have interpreter", String cGhcWithInterpreter),
2284 ("Object splitting", String cSplitObjs),
2285 ("Have native code generator", String cGhcWithNativeCodeGen),
2286 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2287 ("Use archives for ghci", String (show cUseArchivesForGhci)),
2288 ("Support SMP", String cGhcWithSMP),
2289 ("Unregisterised", String cGhcUnregisterised),
2290 ("Tables next to code", String cGhcEnableTablesNextToCode),
2291 ("RTS ways", String cGhcRTSWays),
2292 ("Leading underscore", String cLeadingUnderscore),
2293 ("Debug on", String (show debugIsOn)),
2294 ("LibDir", FromDynFlags topDir),
2295 ("Global Package DB", FromDynFlags systemPackageConfig)