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,
35 DPHBackend(..), dphPackageMaybe,
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
66 -- Only in stage 2 can we be sure that the RTS
67 -- exposes the appropriate runtime boolean
72 #include "HsVersions.h"
74 #ifndef OMIT_NATIVE_CODEGEN
79 import PrelNames ( mAIN )
81 import {-# SOURCE #-} Packages (PackageState)
82 import DriverPhases ( Phase(..), phaseInputExt )
85 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
88 import Maybes ( orElse )
92 import Foreign.C ( CInt )
93 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
95 import System.IO.Unsafe ( unsafePerformIO )
97 import Control.Monad ( when )
101 import Data.Map (Map)
102 import qualified Data.Map as Map
104 import System.FilePath
105 import System.IO ( stderr, hPutChar )
107 -- -----------------------------------------------------------------------------
110 -- | Enumerates the simple on-or-off dynamic flags
117 | Opt_D_dump_cmmz_pretty
121 | Opt_D_dump_asm_native
122 | Opt_D_dump_asm_liveness
123 | Opt_D_dump_asm_coalesce
124 | Opt_D_dump_asm_regalloc
125 | Opt_D_dump_asm_regalloc_stages
126 | Opt_D_dump_asm_conflicts
127 | Opt_D_dump_asm_stats
128 | Opt_D_dump_asm_expanded
130 | Opt_D_dump_core_stats
136 | Opt_D_dump_inlinings
137 | Opt_D_dump_rule_firings
138 | Opt_D_dump_rule_rewrites
139 | Opt_D_dump_occur_anal
143 | Opt_D_dump_simpl_iterations
144 | Opt_D_dump_simpl_phases
153 | Opt_D_dump_worker_wrapper
154 | Opt_D_dump_rn_trace
155 | Opt_D_dump_rn_stats
157 | Opt_D_dump_simpl_stats
158 | Opt_D_dump_cs_trace -- Constraint solver in type checker
159 | Opt_D_dump_tc_trace
160 | Opt_D_dump_if_trace
161 | Opt_D_dump_vt_trace
168 | Opt_D_verbose_core2core
169 | Opt_D_verbose_stg2stg
171 | Opt_D_dump_hi_diffs
172 | Opt_D_dump_minimal_imports
173 | Opt_D_dump_mod_cycles
174 | Opt_D_dump_view_pattern_commoning
175 | Opt_D_faststring_stats
176 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
177 | Opt_D_no_debug_output
183 | Opt_WarnIsError -- -Werror; makes warnings fatal
184 | Opt_WarnDuplicateExports
186 | Opt_WarnImplicitPrelude
187 | Opt_WarnIncompletePatterns
188 | Opt_WarnIncompleteUniPatterns
189 | Opt_WarnIncompletePatternsRecUpd
190 | Opt_WarnMissingFields
191 | Opt_WarnMissingImportList
192 | Opt_WarnMissingMethods
193 | Opt_WarnMissingSigs
194 | Opt_WarnMissingLocalSigs
195 | Opt_WarnNameShadowing
196 | Opt_WarnOverlappingPatterns
197 | Opt_WarnTypeDefaults
198 | Opt_WarnMonomorphism
199 | Opt_WarnUnusedBinds
200 | Opt_WarnUnusedImports
201 | Opt_WarnUnusedMatches
202 | Opt_WarnWarningsDeprecations
203 | Opt_WarnDeprecatedFlags
204 | Opt_WarnDodgyExports
205 | Opt_WarnDodgyImports
207 | Opt_WarnAutoOrphans
210 | Opt_WarnUnrecognisedPragmas
211 | Opt_WarnDodgyForeignImports
212 | Opt_WarnLazyUnliftedBindings
213 | Opt_WarnUnusedDoBind
214 | Opt_WarnWrongDoBind
215 | Opt_WarnAlternativeLayoutRuleTransitional
217 | Opt_PrintExplicitForalls
224 | Opt_StaticArgumentTransformation
228 | Opt_DoLambdaEtaExpansion
232 | Opt_UnboxStrictFields
233 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
235 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
237 | Opt_RegsGraph -- do graph coloring register allocation
238 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
241 | Opt_IgnoreInterfacePragmas
242 | Opt_OmitInterfacePragmas
243 | Opt_ExposeAllUnfoldings
246 | Opt_AutoSccsOnAllToplevs
247 | Opt_AutoSccsOnExportedToplevs
248 | Opt_AutoSccsOnIndividualCafs
254 | Opt_ExcessPrecision
255 | Opt_EagerBlackHoling
256 | Opt_ReadUserPackageConf
260 | Opt_HideAllPackages
261 | Opt_PrintBindResult
265 | Opt_BreakOnException
267 | Opt_PrintEvldWithShow
268 | Opt_PrintBindContents
271 | Opt_EmitExternalCore
273 | Opt_BuildingCabalPackage
281 | Opt_ConvertToZipCfgAndBack
282 | Opt_AutoLinkPackages
283 | Opt_ImplicitImportQualified
291 | Opt_KeepRawTokenStream
296 data Language = Haskell98 | Haskell2010
300 | Opt_OverlappingInstances
301 | Opt_UndecidableInstances
302 | Opt_IncoherentInstances
303 | Opt_MonomorphismRestriction
306 | Opt_RelaxedPolyRec -- Deprecated
307 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
308 | Opt_ForeignFunctionInterface
309 | Opt_UnliftedFFITypes
310 | Opt_GHCForeignImportPrim
311 | Opt_ParallelArrays -- Syntactic support for parallel arrays
312 | Opt_Arrows -- Arrow-notation syntax
313 | Opt_TemplateHaskell
316 | Opt_Generics -- "Derivable type classes"
317 | Opt_ImplicitPrelude
318 | Opt_ScopedTypeVariables
322 | Opt_OverloadedStrings
323 | Opt_DisambiguateRecordFields
324 | Opt_RecordWildCards
330 | Opt_DoAndIfThenElse
331 | Opt_RebindableSyntax
333 | Opt_StandaloneDeriving
334 | Opt_DeriveDataTypeable
336 | Opt_DeriveTraversable
339 | Opt_TypeSynonymInstances
340 | Opt_FlexibleContexts
341 | Opt_FlexibleInstances
342 | Opt_ConstrainedClassMethods
343 | Opt_MultiParamTypeClasses
344 | Opt_FunctionalDependencies
346 | Opt_PolymorphicComponents
347 | Opt_ExistentialQuantification
351 | Opt_ParallelListComp
352 | Opt_TransformListComp
353 | Opt_GeneralizedNewtypeDeriving
356 | Opt_PostfixOperators
359 | Opt_LiberalTypeSynonyms
362 | Opt_ImpredicativeTypes
366 | Opt_AlternativeLayoutRule
367 | Opt_AlternativeLayoutRuleTransitional
368 | Opt_DatatypeContexts
369 | Opt_NondecreasingIndentation
373 -- | Contains not only a collection of 'DynFlag's but also a plethora of
374 -- information relating to the compilation of a single file or GHC session
375 data DynFlags = DynFlags {
378 hscTarget :: HscTarget,
379 hscOutName :: String, -- ^ Name of the output file
380 extCoreName :: String, -- ^ Name of the .hcr output file
381 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
382 optLevel :: Int, -- ^ Optimisation level
383 simplPhases :: Int, -- ^ Number of simplifier phases
384 maxSimplIterations :: Int, -- ^ Max simplifier iterations
385 shouldDumpSimplPhase :: Maybe String,
386 ruleCheck :: Maybe String,
387 strictnessBefore :: [Int], -- ^ Additional demand analysis
389 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
390 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
391 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
392 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
393 -- See CoreMonad.FloatOutSwitches
395 #ifndef OMIT_NATIVE_CODEGEN
396 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
398 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
399 importPaths :: [FilePath],
401 mainFunIs :: Maybe String,
402 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
404 dphBackend :: DPHBackend,
406 thisPackage :: PackageId, -- ^ name of package currently being compiled
409 ways :: [Way], -- ^ Way flags from the command line
410 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
411 rtsBuildTag :: String, -- ^ The RTS \"way\"
413 -- For object splitting
414 splitInfo :: Maybe (String,Int),
417 objectDir :: Maybe String,
418 dylibInstallName :: Maybe String,
419 hiDir :: Maybe String,
420 stubDir :: Maybe String,
426 outputFile :: Maybe String,
427 outputHi :: Maybe String,
428 dynLibLoader :: DynLibLoader,
430 -- | This is set by 'DriverPipeline.runPipeline' based on where
431 -- its output is going.
432 dumpPrefix :: Maybe FilePath,
434 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
435 -- Set by @-ddump-file-prefix@
436 dumpPrefixForce :: Maybe FilePath,
438 includePaths :: [String],
439 libraryPaths :: [String],
440 frameworkPaths :: [String], -- used on darwin only
441 cmdlineFrameworks :: [String], -- ditto
442 tmpDir :: String, -- no trailing '/'
444 ghcUsagePath :: FilePath, -- Filled in by SysTools
445 ghciUsagePath :: FilePath, -- ditto
446 rtsOpts :: Maybe String,
447 rtsOptsEnabled :: RtsOptsEnabled,
449 hpcDir :: String, -- ^ Path to store the .mix files
451 -- options for particular phases
459 opt_windres :: [String],
460 opt_lo :: [String], -- LLVM: llvm optimiser
461 opt_lc :: [String], -- LLVM: llc static compiler
463 -- commands for particular phases
465 pgm_P :: (String,[Option]),
467 pgm_c :: (String,[Option]),
468 pgm_s :: (String,[Option]),
469 pgm_a :: (String,[Option]),
470 pgm_l :: (String,[Option]),
471 pgm_dll :: (String,[Option]),
473 pgm_sysman :: String,
474 pgm_windres :: String,
475 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
476 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
479 depMakefile :: FilePath,
480 depIncludePkgDeps :: Bool,
481 depExcludeMods :: [ModuleName],
482 depSuffixes :: [String],
485 extraPkgConfs :: [FilePath],
486 -- ^ The @-package-conf@ flags given on the command line, in the order
488 topDir :: FilePath, -- filled in by SysTools
489 settings :: [(String, String)], -- filled in by SysTools
490 extraGccViaCFlags :: [String], -- filled in by SysTools
491 systemPackageConfig :: FilePath, -- filled in by SysTools
493 packageFlags :: [PackageFlag],
494 -- ^ The @-package@ and @-hide-package@ flags from the command-line
497 -- NB. do not modify this field, it is calculated by
498 -- Packages.initPackages and Packages.updatePackages.
499 pkgDatabase :: Maybe [PackageConfig],
500 pkgState :: PackageState,
503 -- These have to be IORefs, because the defaultCleanupHandler needs to
504 -- know what to clean when an exception happens
505 filesToClean :: IORef [FilePath],
506 dirsToClean :: IORef (Map FilePath FilePath),
510 -- Don't change this without updating extensionFlags:
511 language :: Maybe Language,
512 -- Don't change this without updating extensionFlags:
513 extensions :: [OnOff ExtensionFlag],
514 -- extensionFlags should always be equal to
515 -- flattenExtensionFlags language extensions
516 extensionFlags :: [ExtensionFlag],
518 -- | Message output action: use "ErrUtils" instead of this if you can
519 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
521 haddockOptions :: Maybe String
524 wayNames :: DynFlags -> [WayName]
525 wayNames = map wayName . ways
527 -- | The target code type of the compilation (if any).
529 -- Whenever you change the target, also make sure to set 'ghcLink' to
530 -- something sensible.
532 -- 'HscNothing' can be used to avoid generating any output, however, note
535 -- * This will not run the desugaring step, thus no warnings generated in
536 -- this step will be output. In particular, this includes warnings related
537 -- to pattern matching. You can run the desugarer manually using
538 -- 'GHC.desugarModule'.
540 -- * If a program uses Template Haskell the typechecker may try to run code
541 -- from an imported module. This will fail if no code has been generated
542 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
543 -- whether this might be the case and choose to either switch to a
544 -- different target or avoid typechecking such modules. (The latter may
545 -- preferable for security reasons.)
548 = HscC -- ^ Generate C code.
549 | HscAsm -- ^ Generate assembly using the native code generator.
550 | HscLlvm -- ^ Generate assembly using the llvm code generator.
551 | HscJava -- ^ Generate Java bytecode.
552 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
553 | HscNothing -- ^ Don't generate any code. See notes above.
556 -- | Will this target result in an object file on the disk?
557 isObjectTarget :: HscTarget -> Bool
558 isObjectTarget HscC = True
559 isObjectTarget HscAsm = True
560 isObjectTarget HscLlvm = True
561 isObjectTarget _ = False
563 -- | The 'GhcMode' tells us whether we're doing multi-module
564 -- compilation (controlled via the "GHC" API) or one-shot
565 -- (single-module) compilation. This makes a difference primarily to
566 -- the "Finder": in one-shot mode we look for interface files for
567 -- imported modules, but in multi-module mode we look for source files
568 -- in order to check whether they need to be recompiled.
570 = CompManager -- ^ @\-\-make@, GHCi, etc.
571 | OneShot -- ^ @ghc -c Foo.hs@
572 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
575 instance Outputable GhcMode where
576 ppr CompManager = ptext (sLit "CompManager")
577 ppr OneShot = ptext (sLit "OneShot")
578 ppr MkDepend = ptext (sLit "MkDepend")
580 isOneShot :: GhcMode -> Bool
581 isOneShot OneShot = True
582 isOneShot _other = False
584 -- | What to do in the link step, if there is one.
586 = NoLink -- ^ Don't link at all
587 | LinkBinary -- ^ Link object code into a binary
588 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
589 -- bytecode and object code).
590 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
593 isNoLink :: GhcLink -> Bool
594 isNoLink NoLink = True
597 -- Is it worth evaluating this Bool and caching it in the DynFlags value
598 -- during initDynFlags?
599 doingTickyProfiling :: DynFlags -> Bool
600 doingTickyProfiling _ = opt_Ticky
601 -- XXX -ticky is a static flag, because it implies -debug which is also
602 -- static. If the way flags were made dynamic, we could fix this.
605 = ExposePackage String
606 | ExposePackageId String
608 | IgnorePackage String
611 defaultHscTarget :: HscTarget
612 defaultHscTarget = defaultObjectTarget
614 -- | The 'HscTarget' value corresponding to the default way to create
615 -- object files on the current platform.
616 defaultObjectTarget :: HscTarget
618 | cGhcWithNativeCodeGen == "YES" = HscAsm
626 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
629 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
630 initDynFlags :: DynFlags -> IO DynFlags
631 initDynFlags dflags = do
632 -- someday these will be dynamic flags
633 ways <- readIORef v_Ways
634 refFilesToClean <- newIORef []
635 refDirsToClean <- newIORef Map.empty
638 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
639 rtsBuildTag = mkBuildTag ways,
640 filesToClean = refFilesToClean,
641 dirsToClean = refDirsToClean
644 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
645 -- and must be fully initialized by 'GHC.newSession' first.
646 defaultDynFlags :: DynFlags
649 ghcMode = CompManager,
650 ghcLink = LinkBinary,
651 hscTarget = defaultHscTarget,
657 maxSimplIterations = 4,
658 shouldDumpSimplPhase = Nothing,
660 specConstrThreshold = Just 200,
661 specConstrCount = Just 3,
662 liberateCaseThreshold = Just 200,
663 floatLamArgs = Just 0, -- Default: float only if no fvs
664 strictnessBefore = [],
666 #ifndef OMIT_NATIVE_CODEGEN
667 targetPlatform = defaultTargetPlatform,
669 cmdlineHcIncludes = [],
673 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
675 dphBackend = DPHNone,
677 thisPackage = mainPackageId,
680 dylibInstallName = Nothing,
684 objectSuf = phaseInputExt StopLn,
685 hcSuf = phaseInputExt HCc,
688 outputFile = Nothing,
690 dynLibLoader = SystemDependent,
691 dumpPrefix = Nothing,
692 dumpPrefixForce = Nothing,
696 cmdlineFrameworks = [],
697 tmpDir = cDEFAULT_TMPDIR,
699 rtsOptsEnabled = RtsOptsSafeOnly,
705 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
718 pkgDatabase = Nothing,
719 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
720 ways = panic "defaultDynFlags: No ways",
721 buildTag = panic "defaultDynFlags: No buildTag",
722 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
724 -- initSysTools fills all these in
725 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
726 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
727 topDir = panic "defaultDynFlags: No topDir",
728 settings = panic "defaultDynFlags: No settings",
729 extraGccViaCFlags = panic "defaultDynFlags: No extraGccViaCFlags",
730 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
731 pgm_L = panic "defaultDynFlags: No pgm_L",
732 pgm_P = panic "defaultDynFlags: No pgm_P",
733 pgm_F = panic "defaultDynFlags: No pgm_F",
734 pgm_c = panic "defaultDynFlags: No pgm_c",
735 pgm_s = panic "defaultDynFlags: No pgm_s",
736 pgm_a = panic "defaultDynFlags: No pgm_a",
737 pgm_l = panic "defaultDynFlags: No pgm_l",
738 pgm_dll = panic "defaultDynFlags: No pgm_dll",
739 pgm_T = panic "defaultDynFlags: No pgm_T",
740 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
741 pgm_windres = panic "defaultDynFlags: No pgm_windres",
742 pgm_lo = panic "defaultDynFlags: No pgm_lo",
743 pgm_lc = panic "defaultDynFlags: No pgm_lc",
744 -- end of initSysTools values
746 depMakefile = "Makefile",
747 depIncludePkgDeps = False,
750 -- end of ghc -M values
751 filesToClean = panic "defaultDynFlags: No filesToClean",
752 dirsToClean = panic "defaultDynFlags: No dirsToClean",
753 haddockOptions = Nothing,
754 flags = defaultFlags,
757 extensionFlags = flattenExtensionFlags Nothing [],
759 log_action = \severity srcSpan style msg ->
761 SevOutput -> printOutput (msg style)
762 SevInfo -> printErrs (msg style)
763 SevFatal -> printErrs (msg style)
766 printErrs ((mkLocMessage srcSpan msg) style)
767 -- careful (#2302): printErrs prints in UTF-8, whereas
768 -- converting to string first and using hPutStr would
769 -- just emit the low 8 bits of each unicode char.
773 Note [Verbosity levels]
774 ~~~~~~~~~~~~~~~~~~~~~~~
775 0 | print errors & warnings only
776 1 | minimal verbosity: print "compiling M ... done." for each module.
777 2 | equivalent to -dshow-passes
778 3 | equivalent to existing "ghc -v"
779 4 | "ghc -v -ddump-most"
780 5 | "ghc -v -ddump-all"
786 -- OnOffs accumulate in reverse order, so we use foldr in order to
787 -- process them in the right order
788 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
790 flattenExtensionFlags ml = foldr f defaultExtensionFlags
791 where f (On f) flags = f : delete f flags
792 f (Off f) flags = delete f flags
793 defaultExtensionFlags = languageExtensions ml
795 languageExtensions :: Maybe Language -> [ExtensionFlag]
797 languageExtensions Nothing
798 -- Nothing => the default case
799 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
800 -- behaviour the default, to see if anyone notices
802 -- In due course I'd like Opt_MonoLocalBinds to be on by default
803 -- But NB it's implied by GADTs etc
804 -- SLPJ September 2010
805 : Opt_NondecreasingIndentation -- This has been on by default for some time
806 : languageExtensions (Just Haskell2010)
808 languageExtensions (Just Haskell98)
809 = [Opt_ImplicitPrelude,
810 Opt_MonomorphismRestriction,
812 Opt_DatatypeContexts,
813 Opt_NondecreasingIndentation
814 -- strictly speaking non-standard, but we always had this
815 -- on implicitly before the option was added in 7.1, and
816 -- turning it off breaks code, so we're keeping it on for
817 -- backwards compatibility. Cabal uses -XHaskell98 by
818 -- default unless you specify another language.
821 languageExtensions (Just Haskell2010)
822 = [Opt_ImplicitPrelude,
823 Opt_MonomorphismRestriction,
824 Opt_DatatypeContexts,
826 Opt_ForeignFunctionInterface,
831 -- | Test whether a 'DynFlag' is set
832 dopt :: DynFlag -> DynFlags -> Bool
833 dopt f dflags = f `elem` (flags dflags)
836 dopt_set :: DynFlags -> DynFlag -> DynFlags
837 dopt_set dfs f = dfs{ flags = f : flags dfs }
839 -- | Unset a 'DynFlag'
840 dopt_unset :: DynFlags -> DynFlag -> DynFlags
841 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
843 -- | Test whether a 'ExtensionFlag' is set
844 xopt :: ExtensionFlag -> DynFlags -> Bool
845 xopt f dflags = f `elem` extensionFlags dflags
847 -- | Set a 'ExtensionFlag'
848 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
850 = let onoffs = On f : extensions dfs
851 in dfs { extensions = onoffs,
852 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
854 -- | Unset a 'ExtensionFlag'
855 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
857 = let onoffs = Off f : extensions dfs
858 in dfs { extensions = onoffs,
859 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
861 setLanguage :: Language -> DynP ()
862 setLanguage l = upd f
863 where f dfs = let mLang = Just l
864 oneoffs = extensions dfs
867 extensionFlags = flattenExtensionFlags mLang oneoffs
870 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
871 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
872 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
873 -> [a] -- ^ Correctly ordered extracted options
874 getOpts dflags opts = reverse (opts dflags)
875 -- We add to the options from the front, so we need to reverse the list
877 -- | Gets the verbosity flag for the current verbosity level. This is fed to
878 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
879 getVerbFlags :: DynFlags -> [String]
881 | verbosity dflags >= 4 = ["-v"]
884 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
885 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
886 setPgmP, addOptl, addOptP,
887 addCmdlineFramework, addHaddockOpts
888 :: String -> DynFlags -> DynFlags
889 setOutputFile, setOutputHi, setDumpPrefixForce
890 :: Maybe String -> DynFlags -> DynFlags
892 setObjectDir f d = d{ objectDir = Just f}
893 setHiDir f d = d{ hiDir = Just f}
894 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
895 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
896 -- \#included from the .hc file when compiling via C (i.e. unregisterised
898 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
899 setDylibInstallName f d = d{ dylibInstallName = Just f}
901 setObjectSuf f d = d{ objectSuf = f}
902 setHiSuf f d = d{ hiSuf = f}
903 setHcSuf f d = d{ hcSuf = f}
905 setOutputFile f d = d{ outputFile = f}
906 setOutputHi f d = d{ outputHi = f}
908 parseDynLibLoaderMode f d =
910 ("deploy", "") -> d{ dynLibLoader = Deployable }
911 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
912 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
914 setDumpPrefixForce f d = d { dumpPrefixForce = f}
916 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
917 -- Config.hs should really use Option.
918 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
919 addOptl f d = d{ opt_l = f : opt_l d}
920 addOptP f d = d{ opt_P = f : opt_P d}
923 setDepMakefile :: FilePath -> DynFlags -> DynFlags
924 setDepMakefile f d = d { depMakefile = deOptDep f }
926 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
927 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
929 addDepExcludeMod :: String -> DynFlags -> DynFlags
931 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
933 addDepSuffix :: FilePath -> DynFlags -> DynFlags
934 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
937 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
938 -- we need to strip the "-optdep" off of the arg
939 deOptDep :: String -> String
940 deOptDep x = case stripPrefix "-optdep" x of
944 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
946 addHaddockOpts f d = d{ haddockOptions = Just f}
948 -- -----------------------------------------------------------------------------
949 -- Command-line options
951 -- | When invoking external tools as part of the compilation pipeline, we
952 -- pass these a sequence of options on the command-line. Rather than
953 -- just using a list of Strings, we use a type that allows us to distinguish
954 -- between filepaths and 'other stuff'. The reason for this is that
955 -- this type gives us a handle on transforming filenames, and filenames only,
956 -- to whatever format they're expected to be on a particular platform.
958 = FileOption -- an entry that _contains_ filename(s) / filepaths.
959 String -- a non-filepath prefix that shouldn't be
960 -- transformed (e.g., "/out=")
961 String -- the filepath/filename portion
964 showOpt :: Option -> String
965 showOpt (FileOption pre f) = pre ++ f
966 showOpt (Option s) = s
968 -----------------------------------------------------------------------------
969 -- Setting the optimisation level
971 updOptLevel :: Int -> DynFlags -> DynFlags
972 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
974 = dfs2{ optLevel = final_n }
976 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
977 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
978 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
980 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
981 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
983 -- -----------------------------------------------------------------------------
984 -- StgToDo: abstraction of stg-to-stg passes to run.
987 = StgDoMassageForProfiling -- should be (next to) last
988 -- There's also setStgVarInfo, but its absolute "lastness"
989 -- is so critical that it is hardwired in (no flag).
992 getStgToDo :: DynFlags -> [StgToDo]
996 stg_stats = dopt Opt_StgStats dflags
998 todo1 = if stg_stats then [D_stg_stats] else []
1000 todo2 | WayProf `elem` wayNames dflags
1001 = StgDoMassageForProfiling : todo1
1005 {- **********************************************************************
1009 %********************************************************************* -}
1011 -- -----------------------------------------------------------------------------
1012 -- Parsing the dynamic flags.
1014 -- | Parse dynamic flags from a list of command line arguments. Returns the
1015 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1016 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1017 -- flags or missing arguments).
1018 parseDynamicFlags :: Monad m =>
1019 DynFlags -> [Located String]
1020 -> m (DynFlags, [Located String], [Located String])
1021 -- ^ Updated 'DynFlags', left-over arguments, and
1022 -- list of warnings.
1023 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1025 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1026 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1027 parseDynamicNoPackageFlags :: Monad m =>
1028 DynFlags -> [Located String]
1029 -> m (DynFlags, [Located String], [Located String])
1030 -- ^ Updated 'DynFlags', left-over arguments, and
1031 -- list of warnings.
1032 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1034 parseDynamicFlags_ :: Monad m =>
1035 DynFlags -> [Located String] -> Bool
1036 -> m (DynFlags, [Located String], [Located String])
1037 parseDynamicFlags_ dflags0 args pkg_flags = do
1038 -- XXX Legacy support code
1039 -- We used to accept things like
1040 -- optdep-f -optdepdepend
1041 -- optdep-f -optdep depend
1042 -- optdep -f -optdepdepend
1043 -- optdep -f -optdep depend
1044 -- but the spaces trip up proper argument handling. So get rid of them.
1045 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1046 f (x : xs) = x : f xs
1050 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1051 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1052 | otherwise = dynamic_flags
1054 let ((leftover, errs, warns), dflags1)
1055 = runCmdLine (processArgs flag_spec args') dflags0
1056 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1058 let (pic_warns, dflags2)
1059 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1060 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1061 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1062 ++ "dynamic on this platform;\n ignoring -fllvm"],
1063 dflags1{ hscTarget = HscAsm })
1065 | otherwise = ([], dflags1)
1067 return (dflags2, leftover, pic_warns ++ warns)
1070 {- **********************************************************************
1072 DynFlags specifications
1074 %********************************************************************* -}
1076 allFlags :: [String]
1077 allFlags = map ('-':) $
1078 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1079 map ("fno-"++) flags ++
1080 map ("f"++) flags ++
1081 map ("f"++) flags' ++
1082 map ("X"++) supportedExtensions
1083 where ok (PrefixPred _ _) = False
1085 flags = [ name | (name, _, _) <- fFlags ]
1086 flags' = [ name | (name, _, _) <- fLangFlags ]
1088 --------------- The main flags themselves ------------------
1089 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1091 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1092 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1093 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1095 (HasArg (\s -> do { addCmdlineHCInclude s
1096 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1097 , Flag "v" (OptIntSuffix setVerbosity)
1099 ------- Specific phases --------------------------------------------
1100 -- need to appear before -pgmL to be parsed as LLVM flags.
1101 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1102 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1103 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1104 , Flag "pgmP" (hasArg setPgmP)
1105 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1106 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1107 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1108 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1109 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1110 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1111 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1112 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1114 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1115 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1116 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1117 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1118 , Flag "optP" (hasArg addOptP)
1119 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1120 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1121 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1122 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1123 , Flag "optl" (hasArg addOptl)
1124 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1127 (NoArg (if can_split
1128 then setDynFlag Opt_SplitObjs
1129 else addWarn "ignoring -fsplit-objs"))
1131 -------- ghc -M -----------------------------------------------------
1132 , Flag "dep-suffix" (hasArg addDepSuffix)
1133 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1134 , Flag "dep-makefile" (hasArg setDepMakefile)
1135 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1136 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1137 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1138 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1139 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1140 , Flag "exclude-module" (hasArg addDepExcludeMod)
1141 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1142 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1144 -------- Linking ----------------------------------------------------
1145 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1146 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1147 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1148 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1150 ------- Libraries ---------------------------------------------------
1151 , Flag "L" (Prefix addLibraryPath)
1152 , Flag "l" (AnySuffix (upd . addOptl))
1154 ------- Frameworks --------------------------------------------------
1155 -- -framework-path should really be -F ...
1156 , Flag "framework-path" (HasArg addFrameworkPath)
1157 , Flag "framework" (hasArg addCmdlineFramework)
1159 ------- Output Redirection ------------------------------------------
1160 , Flag "odir" (hasArg setObjectDir)
1161 , Flag "o" (SepArg (upd . setOutputFile . Just))
1162 , Flag "ohi" (hasArg (setOutputHi . Just ))
1163 , Flag "osuf" (hasArg setObjectSuf)
1164 , Flag "hcsuf" (hasArg setHcSuf)
1165 , Flag "hisuf" (hasArg setHiSuf)
1166 , Flag "hidir" (hasArg setHiDir)
1167 , Flag "tmpdir" (hasArg setTmpDir)
1168 , Flag "stubdir" (hasArg setStubDir)
1169 , Flag "outputdir" (hasArg setOutputDir)
1170 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1172 ------- Keeping temporary files -------------------------------------
1173 -- These can be singular (think ghc -c) or plural (think ghc --make)
1174 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1175 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1176 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1177 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1178 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1179 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1180 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1181 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1182 -- This only makes sense as plural
1183 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1185 ------- Miscellaneous ----------------------------------------------
1186 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1187 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1188 , Flag "with-rtsopts" (HasArg setRtsOpts)
1189 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1190 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1191 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1192 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1193 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1194 , Flag "main-is" (SepArg setMainIs)
1195 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1196 , Flag "haddock-opts" (hasArg addHaddockOpts)
1197 , Flag "hpcdir" (SepArg setOptHpcDir)
1199 ------- recompilation checker --------------------------------------
1200 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1201 ; deprecate "Use -fno-force-recomp instead" }))
1202 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1203 ; deprecate "Use -fforce-recomp instead" }))
1205 ------ HsCpp opts ---------------------------------------------------
1206 , Flag "D" (AnySuffix (upd . addOptP))
1207 , Flag "U" (AnySuffix (upd . addOptP))
1209 ------- Include/Import Paths ----------------------------------------
1210 , Flag "I" (Prefix addIncludePath)
1211 , Flag "i" (OptPrefix addImportPath)
1213 ------ Debugging ----------------------------------------------------
1214 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1216 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1217 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1218 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1219 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1220 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1221 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1222 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1223 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1224 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1225 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1226 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1227 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1228 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1229 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1230 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1231 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1232 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1233 ; setDumpFlag' Opt_D_dump_llvm}))
1234 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1235 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1236 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1237 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1238 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1239 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1240 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1241 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1242 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1243 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1244 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1245 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1246 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1247 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1248 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1249 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1250 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1251 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1252 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1253 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1254 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1255 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1256 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1257 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1258 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1259 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1260 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1261 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1262 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1263 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1264 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1265 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1266 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1267 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1268 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1269 ; setVerboseCore2Core }))
1270 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1271 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1272 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1273 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1274 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1275 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1276 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1277 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1278 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1279 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1280 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1281 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1282 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1283 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1284 , Flag "dshow-passes" (NoArg (do forceRecompile
1285 setVerbosity (Just 2)))
1286 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1288 ------ Machine dependant (-m<blah>) stuff ---------------------------
1290 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1291 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1292 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1293 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1295 ------ Warning opts -------------------------------------------------
1296 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1297 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1298 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1299 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1300 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1301 ; deprecate "Use -w instead" }))
1302 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1304 ------ Optimisation flags ------------------------------------------
1305 , Flag "O" (noArg (setOptLevel 1))
1306 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1307 , Flag "Odph" (noArg setDPHOpt)
1308 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1309 -- If the number is missing, use 1
1311 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1312 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1313 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1314 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1315 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1316 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1317 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1318 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1319 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1320 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1321 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1322 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1323 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
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))
1344 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1346 ------ Compiler flags -----------------------------------------------
1348 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1349 , Flag "fvia-c" (NoArg
1350 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1351 , Flag "fvia-C" (NoArg
1352 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1353 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1355 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1356 setTarget HscNothing))
1357 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1358 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1359 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1360 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1362 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1363 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1364 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1365 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1366 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1367 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1368 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1370 package_flags :: [Flag (CmdLineP DynFlags)]
1372 ------- Packages ----------------------------------------------------
1373 Flag "package-conf" (HasArg extraPkgConf_)
1374 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1375 , Flag "package-name" (hasArg setPackageName)
1376 , Flag "package-id" (HasArg exposePackageId)
1377 , Flag "package" (HasArg exposePackage)
1378 , Flag "hide-package" (HasArg hidePackage)
1379 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1380 , Flag "ignore-package" (HasArg ignorePackage)
1381 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1382 ; deprecate "Use -package instead" }))
1385 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1386 -- False <=> we are turning the flag off
1387 turnOn :: TurnOnFlag; turnOn = True
1388 turnOff :: TurnOnFlag; turnOff = False
1391 = ( String -- Flag in string form
1392 , flag -- Flag in internal form
1393 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1394 -- Typically, emit a warning or error
1396 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1397 -> String -- ^ The flag prefix
1398 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1399 -> FlagSpec flag -- ^ Specification of this particular flag
1400 -> Flag (CmdLineP DynFlags)
1401 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1402 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1404 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1405 deprecatedForExtension lang turn_on
1406 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1408 flag | turn_on = lang
1409 | otherwise = "No"++lang
1411 useInstead :: String -> TurnOnFlag -> DynP ()
1412 useInstead flag turn_on
1413 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1415 no = if turn_on then "" else "no-"
1417 nop :: TurnOnFlag -> DynP ()
1420 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1421 fFlags :: [FlagSpec DynFlag]
1423 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1424 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1425 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1426 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1427 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1428 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1429 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1430 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1431 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1432 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1433 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1434 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1435 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1436 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1437 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1438 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1439 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1440 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1441 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1442 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1443 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1444 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1445 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1446 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1447 ( "warn-orphans", Opt_WarnOrphans, nop ),
1448 ( "warn-identities", Opt_WarnIdentities, nop ),
1449 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1450 ( "warn-tabs", Opt_WarnTabs, nop ),
1451 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1452 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1453 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1454 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1455 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1456 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1457 ( "strictness", Opt_Strictness, nop ),
1458 ( "specialise", Opt_Specialise, nop ),
1459 ( "float-in", Opt_FloatIn, nop ),
1460 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1461 ( "full-laziness", Opt_FullLaziness, nop ),
1462 ( "liberate-case", Opt_LiberateCase, nop ),
1463 ( "spec-constr", Opt_SpecConstr, nop ),
1464 ( "cse", Opt_CSE, nop ),
1465 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1466 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1467 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1468 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1469 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1470 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1471 ( "case-merge", Opt_CaseMerge, nop ),
1472 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1473 ( "method-sharing", Opt_MethodSharing,
1474 \_ -> deprecate "doesn't do anything any more"),
1475 -- Remove altogether in GHC 7.2
1476 ( "dicts-cheap", Opt_DictsCheap, nop ),
1477 ( "excess-precision", Opt_ExcessPrecision, nop ),
1478 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1479 ( "print-bind-result", Opt_PrintBindResult, nop ),
1480 ( "force-recomp", Opt_ForceRecomp, nop ),
1481 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1482 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1483 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1484 ( "break-on-exception", Opt_BreakOnException, nop ),
1485 ( "break-on-error", Opt_BreakOnError, nop ),
1486 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1487 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1488 ( "run-cps", Opt_RunCPS, nop ),
1489 ( "run-cpsz", Opt_RunCPSZ, nop ),
1490 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1491 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1492 ( "vectorise", Opt_Vectorise, nop ),
1493 ( "regs-graph", Opt_RegsGraph, nop ),
1494 ( "regs-iterative", Opt_RegsIterative, nop ),
1495 ( "gen-manifest", Opt_GenManifest, nop ),
1496 ( "embed-manifest", Opt_EmbedManifest, nop ),
1497 ( "ext-core", Opt_EmitExternalCore, nop ),
1498 ( "shared-implib", Opt_SharedImplib, nop ),
1499 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1500 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1501 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1502 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1505 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1506 fLangFlags :: [FlagSpec ExtensionFlag]
1508 ( "th", Opt_TemplateHaskell,
1509 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1510 ( "fi", Opt_ForeignFunctionInterface,
1511 deprecatedForExtension "ForeignFunctionInterface" ),
1512 ( "ffi", Opt_ForeignFunctionInterface,
1513 deprecatedForExtension "ForeignFunctionInterface" ),
1514 ( "arrows", Opt_Arrows,
1515 deprecatedForExtension "Arrows" ),
1516 ( "generics", Opt_Generics,
1517 deprecatedForExtension "Generics" ),
1518 ( "implicit-prelude", Opt_ImplicitPrelude,
1519 deprecatedForExtension "ImplicitPrelude" ),
1520 ( "bang-patterns", Opt_BangPatterns,
1521 deprecatedForExtension "BangPatterns" ),
1522 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1523 deprecatedForExtension "MonomorphismRestriction" ),
1524 ( "mono-pat-binds", Opt_MonoPatBinds,
1525 deprecatedForExtension "MonoPatBinds" ),
1526 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1527 deprecatedForExtension "ExtendedDefaultRules" ),
1528 ( "implicit-params", Opt_ImplicitParams,
1529 deprecatedForExtension "ImplicitParams" ),
1530 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1531 deprecatedForExtension "ScopedTypeVariables" ),
1532 ( "parr", Opt_ParallelArrays,
1533 deprecatedForExtension "ParallelArrays" ),
1534 ( "PArr", Opt_ParallelArrays,
1535 deprecatedForExtension "ParallelArrays" ),
1536 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1537 deprecatedForExtension "OverlappingInstances" ),
1538 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1539 deprecatedForExtension "UndecidableInstances" ),
1540 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1541 deprecatedForExtension "IncoherentInstances" )
1544 supportedLanguages :: [String]
1545 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1547 supportedExtensions :: [String]
1548 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1550 supportedLanguagesAndExtensions :: [String]
1551 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1553 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1554 languageFlags :: [FlagSpec Language]
1556 ( "Haskell98", Haskell98, nop ),
1557 ( "Haskell2010", Haskell2010, nop )
1560 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1561 xFlags :: [FlagSpec ExtensionFlag]
1563 ( "CPP", Opt_Cpp, nop ),
1564 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1565 ( "TupleSections", Opt_TupleSections, nop ),
1566 ( "PatternGuards", Opt_PatternGuards, nop ),
1567 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1568 ( "MagicHash", Opt_MagicHash, nop ),
1569 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1570 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1571 ( "KindSignatures", Opt_KindSignatures, nop ),
1572 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1573 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1574 ( "TransformListComp", Opt_TransformListComp, nop ),
1575 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1576 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1577 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1578 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1579 ( "Rank2Types", Opt_Rank2Types, nop ),
1580 ( "RankNTypes", Opt_RankNTypes, nop ),
1581 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1582 ( "TypeOperators", Opt_TypeOperators, nop ),
1583 ( "RecursiveDo", Opt_RecursiveDo,
1584 deprecatedForExtension "DoRec"),
1585 ( "DoRec", Opt_DoRec, nop ),
1586 ( "Arrows", Opt_Arrows, nop ),
1587 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1588 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1589 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1590 ( "Generics", Opt_Generics, nop ),
1591 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1592 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1593 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1594 ( "RecordPuns", Opt_RecordPuns,
1595 deprecatedForExtension "NamedFieldPuns" ),
1596 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1597 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1598 ( "GADTs", Opt_GADTs, nop ),
1599 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1600 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1601 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1602 ( "BangPatterns", Opt_BangPatterns, nop ),
1603 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1604 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1605 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1606 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1607 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1608 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1609 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1610 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1611 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1612 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1613 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1614 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1615 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1616 \ turn_on -> if not turn_on
1617 then deprecate "You can't turn off RelaxedPolyRec any more"
1619 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1620 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1621 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1623 ( "PatternSignatures", Opt_ScopedTypeVariables,
1624 deprecatedForExtension "ScopedTypeVariables" ),
1626 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1627 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1628 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1629 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1630 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1631 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1632 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1633 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1634 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1635 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1636 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1637 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1638 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1639 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1640 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1641 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1642 ( "PackageImports", Opt_PackageImports, nop )
1645 defaultFlags :: [DynFlag]
1647 = [ Opt_AutoLinkPackages,
1648 Opt_ReadUserPackageConf,
1652 #if GHC_DEFAULT_NEW_CODEGEN
1658 Opt_PrintBindContents,
1663 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1664 -- The default -O0 options
1668 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1670 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1671 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1672 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1673 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1674 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1675 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1676 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1677 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1679 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1681 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1682 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1683 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1685 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1686 -- all over the place
1688 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1690 -- Record wild-cards implies field disambiguation
1691 -- Otherwise if you write (C {..}) you may well get
1692 -- stuff like " 'a' not in scope ", which is a bit silly
1693 -- if the compiler has just filled in field 'a' of constructor 'C'
1694 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1696 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1699 optLevelFlags :: [([Int], DynFlag)]
1701 = [ ([0], Opt_IgnoreInterfacePragmas)
1702 , ([0], Opt_OmitInterfacePragmas)
1704 , ([1,2], Opt_IgnoreAsserts)
1705 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1707 , ([1,2], Opt_DoEtaReduction)
1708 , ([1,2], Opt_CaseMerge)
1709 , ([1,2], Opt_Strictness)
1711 , ([1,2], Opt_FullLaziness)
1712 , ([1,2], Opt_Specialise)
1713 , ([1,2], Opt_FloatIn)
1715 , ([2], Opt_LiberateCase)
1716 , ([2], Opt_SpecConstr)
1717 , ([2], Opt_RegsGraph)
1719 -- , ([2], Opt_StaticArgumentTransformation)
1720 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1721 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1722 -- several improvements to the heuristics, and I'm concerned that without
1723 -- those changes SAT will interfere with some attempts to write "high
1724 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1725 -- this year. In particular, the version in HEAD lacks the tail call
1726 -- criterion, so many things that look like reasonable loops will be
1727 -- turned into functions with extra (unneccesary) thunk creation.
1729 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1730 -- This one is important for a tiresome reason:
1731 -- we want to make sure that the bindings for data
1732 -- constructors are eta-expanded. This is probably
1733 -- a good thing anyway, but it seems fragile.
1736 -- -----------------------------------------------------------------------------
1737 -- Standard sets of warning options
1739 standardWarnings :: [DynFlag]
1741 = [ Opt_WarnWarningsDeprecations,
1742 Opt_WarnDeprecatedFlags,
1743 Opt_WarnUnrecognisedPragmas,
1744 Opt_WarnOverlappingPatterns,
1745 Opt_WarnMissingFields,
1746 Opt_WarnMissingMethods,
1747 Opt_WarnDuplicateExports,
1748 Opt_WarnLazyUnliftedBindings,
1749 Opt_WarnDodgyForeignImports,
1750 Opt_WarnWrongDoBind,
1751 Opt_WarnAlternativeLayoutRuleTransitional
1754 minusWOpts :: [DynFlag]
1755 -- Things you get with -W
1757 = standardWarnings ++
1758 [ Opt_WarnUnusedBinds,
1759 Opt_WarnUnusedMatches,
1760 Opt_WarnUnusedImports,
1761 Opt_WarnIncompletePatterns,
1762 Opt_WarnDodgyExports,
1763 Opt_WarnDodgyImports
1766 minusWallOpts :: [DynFlag]
1767 -- Things you get with -Wall
1770 [ Opt_WarnTypeDefaults,
1771 Opt_WarnNameShadowing,
1772 Opt_WarnMissingSigs,
1775 Opt_WarnUnusedDoBind
1778 minuswRemovesOpts :: [DynFlag]
1779 -- minuswRemovesOpts should be every warning option
1783 Opt_WarnIncompletePatternsRecUpd,
1784 Opt_WarnIncompleteUniPatterns,
1785 Opt_WarnMonomorphism,
1786 Opt_WarnUnrecognisedPragmas,
1787 Opt_WarnAutoOrphans,
1788 Opt_WarnImplicitPrelude
1791 enableGlasgowExts :: DynP ()
1792 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1793 mapM_ setExtensionFlag glasgowExtsFlags
1795 disableGlasgowExts :: DynP ()
1796 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1797 mapM_ unSetExtensionFlag glasgowExtsFlags
1799 glasgowExtsFlags :: [ExtensionFlag]
1800 glasgowExtsFlags = [
1801 Opt_ForeignFunctionInterface
1802 , Opt_UnliftedFFITypes
1803 , Opt_ImplicitParams
1804 , Opt_ScopedTypeVariables
1806 , Opt_TypeSynonymInstances
1807 , Opt_StandaloneDeriving
1808 , Opt_DeriveDataTypeable
1810 , Opt_DeriveFoldable
1811 , Opt_DeriveTraversable
1812 , Opt_FlexibleContexts
1813 , Opt_FlexibleInstances
1814 , Opt_ConstrainedClassMethods
1815 , Opt_MultiParamTypeClasses
1816 , Opt_FunctionalDependencies
1818 , Opt_PolymorphicComponents
1819 , Opt_ExistentialQuantification
1821 , Opt_PostfixOperators
1823 , Opt_LiberalTypeSynonyms
1827 , Opt_ParallelListComp
1828 , Opt_EmptyDataDecls
1829 , Opt_KindSignatures
1830 , Opt_GeneralizedNewtypeDeriving ]
1833 -- Consult the RTS to find whether GHC itself has been built profiled
1834 -- If so, you can't use Template Haskell
1835 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1837 rtsIsProfiled :: Bool
1838 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1840 checkTemplateHaskellOk :: Bool -> DynP ()
1841 checkTemplateHaskellOk turn_on
1842 | turn_on && rtsIsProfiled
1843 = addErr "You can't use Template Haskell with a profiled compiler"
1847 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1848 -- so we simply say "ok". It doesn't matter because TH isn't
1849 -- available in stage 1 anyway.
1850 checkTemplateHaskellOk turn_on = return ()
1853 {- **********************************************************************
1855 DynFlags constructors
1857 %********************************************************************* -}
1859 type DynP = EwM (CmdLineP DynFlags)
1861 upd :: (DynFlags -> DynFlags) -> DynP ()
1862 upd f = liftEwM (do { dfs <- getCmdLineState
1863 ; putCmdLineState $! (f dfs) })
1865 --------------- Constructor functions for OptKind -----------------
1866 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1867 noArg fn = NoArg (upd fn)
1869 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1870 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1872 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1873 hasArg fn = HasArg (upd . fn)
1875 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1876 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1877 ; deprecate deprec })
1879 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1880 intSuffix fn = IntSuffix (\n -> upd (fn n))
1882 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1883 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1885 --------------------------
1886 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1887 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1888 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1890 --------------------------
1891 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1892 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1895 deps = [ if turn_on then setExtensionFlag d
1896 else unSetExtensionFlag d
1897 | (f', turn_on, d) <- impliedFlags, f' == f ]
1898 -- When you set f, set the ones it implies
1899 -- NB: use setExtensionFlag recursively, in case the implied flags
1900 -- implies further flags
1902 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1903 -- When you un-set f, however, we don't un-set the things it implies
1904 -- (except for -fno-glasgow-exts, which is treated specially)
1906 --------------------------
1907 setDumpFlag' :: DynFlag -> DynP ()
1908 setDumpFlag' dump_flag
1909 = do { setDynFlag dump_flag
1910 ; when want_recomp forceRecompile }
1912 -- Certain dumpy-things are really interested in what's going
1913 -- on during recompilation checking, so in those cases we
1914 -- don't want to turn it off.
1915 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1916 Opt_D_dump_hi_diffs]
1918 forceRecompile :: DynP ()
1919 -- Whenver we -ddump, force recompilation (by switching off the
1920 -- recompilation checker), else you don't see the dump! However,
1921 -- don't switch it off in --make mode, else *everything* gets
1922 -- recompiled which probably isn't what you want
1923 forceRecompile = do { dfs <- liftEwM getCmdLineState
1924 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1926 force_recomp dfs = isOneShot (ghcMode dfs)
1928 setVerboseCore2Core :: DynP ()
1929 setVerboseCore2Core = do forceRecompile
1930 setDynFlag Opt_D_verbose_core2core
1931 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1934 setDumpSimplPhases :: String -> DynP ()
1935 setDumpSimplPhases s = do forceRecompile
1936 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1938 spec = case s of { ('=' : s') -> s'; _ -> s }
1940 setVerbosity :: Maybe Int -> DynP ()
1941 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1943 addCmdlineHCInclude :: String -> DynP ()
1944 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1946 extraPkgConf_ :: FilePath -> DynP ()
1947 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1949 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1951 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1953 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1955 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1957 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1959 setPackageName :: String -> DynFlags -> DynFlags
1960 setPackageName p s = s{ thisPackage = stringToPackageId p }
1962 -- If we're linking a binary, then only targets that produce object
1963 -- code are allowed (requests for other target types are ignored).
1964 setTarget :: HscTarget -> DynP ()
1965 setTarget l = upd set
1968 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1971 -- Changes the target only if we're compiling object code. This is
1972 -- used by -fasm and -fllvm, which switch from one to the other, but
1973 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
1974 -- can be safely used in an OPTIONS_GHC pragma.
1975 setObjTarget :: HscTarget -> DynP ()
1976 setObjTarget l = upd set
1979 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1982 setOptLevel :: Int -> DynFlags -> DynFlags
1983 setOptLevel n dflags
1984 | hscTarget dflags == HscInterpreted && n > 0
1986 -- not in IO any more, oh well:
1987 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1989 = updOptLevel n dflags
1992 -- -Odph is equivalent to
1994 -- -O2 optimise as much as possible
1995 -- -fmax-simplifier-iterations20 this is necessary sometimes
1996 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
1998 setDPHOpt :: DynFlags -> DynFlags
1999 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2003 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2004 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2005 -- vectoriser cannot be used.
2007 data DPHBackend = DPHPar -- "dph-par"
2008 | DPHSeq -- "dph-seq"
2009 | DPHThis -- the currently compiled package
2010 | DPHNone -- no DPH library available
2011 deriving(Eq, Ord, Enum, Show)
2013 setDPHBackend :: DPHBackend -> DynP ()
2014 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2016 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2018 dphPackageMaybe :: DynFlags -> Maybe PackageId
2019 dphPackageMaybe dflags
2020 = case dphBackend dflags of
2021 DPHPar -> Just dphParPackageId
2022 DPHSeq -> Just dphSeqPackageId
2023 DPHThis -> Just (thisPackage dflags)
2026 setMainIs :: String -> DynP ()
2028 | not (null main_fn) && isLower (head main_fn)
2029 -- The arg looked like "Foo.Bar.baz"
2030 = upd $ \d -> d{ mainFunIs = Just main_fn,
2031 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2033 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2034 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2036 | otherwise -- The arg looked like "baz"
2037 = upd $ \d -> d{ mainFunIs = Just arg }
2039 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2041 -----------------------------------------------------------------------------
2042 -- Paths & Libraries
2044 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2046 -- -i on its own deletes the import paths
2047 addImportPath "" = upd (\s -> s{importPaths = []})
2048 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2052 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2055 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2057 addFrameworkPath p =
2058 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2060 #ifndef mingw32_TARGET_OS
2061 split_marker :: Char
2062 split_marker = ':' -- not configurable (ToDo)
2065 splitPathList :: String -> [String]
2066 splitPathList s = filter notNull (splitUp s)
2067 -- empty paths are ignored: there might be a trailing
2068 -- ':' in the initial list, for example. Empty paths can
2069 -- cause confusion when they are translated into -I options
2070 -- for passing to gcc.
2072 #ifndef mingw32_TARGET_OS
2073 splitUp xs = split split_marker xs
2075 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2077 -- That is, if "foo:bar:baz" is used, this interpreted as
2078 -- consisting of three entries, 'foo', 'bar', 'baz'.
2079 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2080 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2082 -- Notice that no attempt is made to fully replace the 'standard'
2083 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2084 -- that this will cause too much breakage for users & ':' will
2085 -- work fine even with DOS paths, if you're not insisting on being silly.
2088 splitUp (x:':':div:xs) | div `elem` dir_markers
2089 = ((x:':':div:p): splitUp rs)
2091 (p,rs) = findNextPath xs
2092 -- we used to check for existence of the path here, but that
2093 -- required the IO monad to be threaded through the command-line
2094 -- parser which is quite inconvenient. The
2095 splitUp xs = cons p (splitUp rs)
2097 (p,rs) = findNextPath xs
2102 -- will be called either when we've consumed nought or the
2103 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2104 -- finding the next split marker.
2106 case break (`elem` split_markers) xs of
2107 (p, _:ds) -> (p, ds)
2110 split_markers :: [Char]
2111 split_markers = [':', ';']
2113 dir_markers :: [Char]
2114 dir_markers = ['/', '\\']
2117 -- -----------------------------------------------------------------------------
2118 -- tmpDir, where we store temporary files.
2120 setTmpDir :: FilePath -> DynFlags -> DynFlags
2121 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2122 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2123 -- seem necessary now --SDM 7/2/2008
2125 -----------------------------------------------------------------------------
2128 setRtsOpts :: String -> DynP ()
2129 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2131 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2132 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2134 -----------------------------------------------------------------------------
2137 setOptHpcDir :: String -> DynP ()
2138 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2140 -----------------------------------------------------------------------------
2141 -- Via-C compilation stuff
2143 -- There are some options that we need to pass to gcc when compiling
2144 -- Haskell code via C, but are only supported by recent versions of
2145 -- gcc. The configure script decides which of these options we need,
2146 -- and puts them in the "settings" file in $topdir. The advantage of
2147 -- having these in a separate file is that the file can be created at
2148 -- install-time depending on the available gcc version, and even
2149 -- re-generated later if gcc is upgraded.
2151 -- The options below are not dependent on the version of gcc, only the
2154 machdepCCOpts :: DynFlags -> [String] -- flags for all C compilations
2155 machdepCCOpts dflags = cCcOpts ++ machdepCCOpts'
2157 machdepCCOpts' :: [String] -- flags for all C compilations
2159 #if alpha_TARGET_ARCH
2161 #ifdef HAVE_THREADED_RTS_SUPPORT
2165 -- For now, to suppress the gcc warning "call-clobbered
2166 -- register used for global register variable", we simply
2167 -- disable all warnings altogether using the -w flag. Oh well.
2169 #elif hppa_TARGET_ARCH
2170 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2171 -- (very nice, but too bad the HP /usr/include files don't agree.)
2172 = ["-D_HPUX_SOURCE"]
2174 #elif i386_TARGET_ARCH
2175 -- -fno-defer-pop : basically the same game as for m68k
2177 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2178 -- the fp (%ebp) for our register maps.
2179 = if opt_Static then ["-DDONT_WANT_WIN32_DLL_SUPPORT"] else []
2185 picCCOpts :: DynFlags -> [String]
2187 #if darwin_TARGET_OS
2188 -- Apple prefers to do things the other way round.
2189 -- PIC is on by default.
2190 -- -mdynamic-no-pic:
2191 -- Turn off PIC code generation.
2193 -- Don't generate "common" symbols - these are unwanted
2194 -- in dynamic libraries.
2197 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2199 = ["-mdynamic-no-pic"]
2200 #elif mingw32_TARGET_OS
2201 -- no -fPIC for Windows
2203 = ["-U __PIC__","-D__PIC__"]
2207 -- we need -fPIC for C files when we are compiling with -dynamic,
2208 -- otherwise things like stub.c files don't get compiled
2209 -- correctly. They need to reference data in the Haskell
2210 -- objects, but can't without -fPIC. See
2211 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2212 | opt_PIC || not opt_Static
2213 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2218 -- -----------------------------------------------------------------------------
2222 can_split = cSupportsSplitObjs == "YES"
2224 -- -----------------------------------------------------------------------------
2227 compilerInfo :: DynFlags -> [(String, String)]
2229 = -- We always make "Project name" be first to keep parsing in
2230 -- other languages simple, i.e. when looking for other fields,
2231 -- you don't have to worry whether there is a leading '[' or not
2232 ("Project name", cProjectName)
2233 -- Next come the settings, so anything else can be overridden
2234 -- in the settings file (as "lookup" uses the first match for the
2237 ++ [("Project version", cProjectVersion),
2238 ("Booter version", cBooterVersion),
2240 ("Build platform", cBuildPlatformString),
2241 ("Host platform", cHostPlatformString),
2242 ("Target platform", cTargetPlatformString),
2243 ("Have interpreter", cGhcWithInterpreter),
2244 ("Object splitting supported", cSupportsSplitObjs),
2245 ("Have native code generator", cGhcWithNativeCodeGen),
2246 ("Support SMP", cGhcWithSMP),
2247 ("Unregisterised", cGhcUnregisterised),
2248 ("Tables next to code", cGhcEnableTablesNextToCode),
2249 ("RTS ways", cGhcRTSWays),
2250 ("Leading underscore", cLeadingUnderscore),
2251 ("Debug on", show debugIsOn),
2252 ("LibDir", topDir dflags),
2253 ("Global Package DB", systemPackageConfig dflags),
2254 ("C compiler flags", show cCcOpts),
2255 ("Gcc Linker flags", show cGccLinkerOpts),
2256 ("Ld Linker flags", show cLdLinkerOpts)