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,
39 ghcUsagePath, ghciUsagePath, topDir, tmpDir, rawSettings,
40 extraGccViaCFlags, systemPackageConfig,
41 pgm_L, pgm_P, pgm_F, pgm_c, pgm_s, pgm_a, pgm_l, pgm_dll, pgm_T,
42 pgm_sysman, pgm_windres, pgm_lo, pgm_lc,
45 -- ** Manipulating DynFlags
46 defaultDynFlags, -- Settings -> DynFlags
47 initDynFlags, -- DynFlags -> IO DynFlags
49 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
56 -- ** Parsing DynFlags
58 parseDynamicNoPackageFlags,
61 supportedLanguagesAndExtensions,
63 -- ** DynFlag C compiler options
64 machdepCCOpts, picCCOpts,
66 -- * Configuration of the stg-to-stg passes
70 -- * Compiler configuration suitable for display to the user
73 -- Only in stage 2 can we be sure that the RTS
74 -- exposes the appropriate runtime boolean
79 #include "HsVersions.h"
81 #ifndef OMIT_NATIVE_CODEGEN
86 import PrelNames ( mAIN )
88 import {-# SOURCE #-} Packages (PackageState)
89 import DriverPhases ( Phase(..), phaseInputExt )
92 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
95 import Maybes ( orElse )
99 import Foreign.C ( CInt )
100 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
102 import System.IO.Unsafe ( unsafePerformIO )
104 import Control.Monad ( when )
108 import Data.Map (Map)
109 import qualified Data.Map as Map
111 import System.FilePath
112 import System.IO ( stderr, hPutChar )
114 -- -----------------------------------------------------------------------------
117 -- | Enumerates the simple on-or-off dynamic flags
124 | Opt_D_dump_cmmz_pretty
128 | Opt_D_dump_asm_native
129 | Opt_D_dump_asm_liveness
130 | Opt_D_dump_asm_coalesce
131 | Opt_D_dump_asm_regalloc
132 | Opt_D_dump_asm_regalloc_stages
133 | Opt_D_dump_asm_conflicts
134 | Opt_D_dump_asm_stats
135 | Opt_D_dump_asm_expanded
137 | Opt_D_dump_core_stats
143 | Opt_D_dump_inlinings
144 | Opt_D_dump_rule_firings
145 | Opt_D_dump_rule_rewrites
146 | Opt_D_dump_occur_anal
150 | Opt_D_dump_simpl_iterations
151 | Opt_D_dump_simpl_phases
160 | Opt_D_dump_worker_wrapper
161 | Opt_D_dump_rn_trace
162 | Opt_D_dump_rn_stats
164 | Opt_D_dump_simpl_stats
165 | Opt_D_dump_cs_trace -- Constraint solver in type checker
166 | Opt_D_dump_tc_trace
167 | Opt_D_dump_if_trace
168 | Opt_D_dump_vt_trace
175 | Opt_D_verbose_core2core
176 | Opt_D_verbose_stg2stg
178 | Opt_D_dump_hi_diffs
179 | Opt_D_dump_minimal_imports
180 | Opt_D_dump_mod_cycles
181 | Opt_D_dump_view_pattern_commoning
182 | Opt_D_faststring_stats
183 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
184 | Opt_D_no_debug_output
190 | Opt_WarnIsError -- -Werror; makes warnings fatal
191 | Opt_WarnDuplicateExports
193 | Opt_WarnImplicitPrelude
194 | Opt_WarnIncompletePatterns
195 | Opt_WarnIncompleteUniPatterns
196 | Opt_WarnIncompletePatternsRecUpd
197 | Opt_WarnMissingFields
198 | Opt_WarnMissingImportList
199 | Opt_WarnMissingMethods
200 | Opt_WarnMissingSigs
201 | Opt_WarnMissingLocalSigs
202 | Opt_WarnNameShadowing
203 | Opt_WarnOverlappingPatterns
204 | Opt_WarnTypeDefaults
205 | Opt_WarnMonomorphism
206 | Opt_WarnUnusedBinds
207 | Opt_WarnUnusedImports
208 | Opt_WarnUnusedMatches
209 | Opt_WarnWarningsDeprecations
210 | Opt_WarnDeprecatedFlags
211 | Opt_WarnDodgyExports
212 | Opt_WarnDodgyImports
214 | Opt_WarnAutoOrphans
217 | Opt_WarnUnrecognisedPragmas
218 | Opt_WarnDodgyForeignImports
219 | Opt_WarnLazyUnliftedBindings
220 | Opt_WarnUnusedDoBind
221 | Opt_WarnWrongDoBind
222 | Opt_WarnAlternativeLayoutRuleTransitional
224 | Opt_PrintExplicitForalls
231 | Opt_StaticArgumentTransformation
235 | Opt_DoLambdaEtaExpansion
239 | Opt_UnboxStrictFields
240 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
242 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
244 | Opt_RegsGraph -- do graph coloring register allocation
245 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
248 | Opt_IgnoreInterfacePragmas
249 | Opt_OmitInterfacePragmas
250 | Opt_ExposeAllUnfoldings
253 | Opt_AutoSccsOnAllToplevs
254 | Opt_AutoSccsOnExportedToplevs
255 | Opt_AutoSccsOnIndividualCafs
261 | Opt_ExcessPrecision
262 | Opt_EagerBlackHoling
263 | Opt_ReadUserPackageConf
267 | Opt_HideAllPackages
268 | Opt_PrintBindResult
272 | Opt_BreakOnException
274 | Opt_PrintEvldWithShow
275 | Opt_PrintBindContents
278 | Opt_EmitExternalCore
280 | Opt_BuildingCabalPackage
288 | Opt_ConvertToZipCfgAndBack
289 | Opt_AutoLinkPackages
290 | Opt_ImplicitImportQualified
298 | Opt_KeepRawTokenStream
303 data Language = Haskell98 | Haskell2010
307 | Opt_OverlappingInstances
308 | Opt_UndecidableInstances
309 | Opt_IncoherentInstances
310 | Opt_MonomorphismRestriction
313 | Opt_RelaxedPolyRec -- Deprecated
314 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
315 | Opt_ForeignFunctionInterface
316 | Opt_UnliftedFFITypes
317 | Opt_GHCForeignImportPrim
318 | Opt_ParallelArrays -- Syntactic support for parallel arrays
319 | Opt_Arrows -- Arrow-notation syntax
320 | Opt_TemplateHaskell
323 | Opt_Generics -- "Derivable type classes"
324 | Opt_ImplicitPrelude
325 | Opt_ScopedTypeVariables
329 | Opt_OverloadedStrings
330 | Opt_DisambiguateRecordFields
331 | Opt_RecordWildCards
337 | Opt_DoAndIfThenElse
338 | Opt_RebindableSyntax
340 | Opt_StandaloneDeriving
341 | Opt_DeriveDataTypeable
343 | Opt_DeriveTraversable
346 | Opt_TypeSynonymInstances
347 | Opt_FlexibleContexts
348 | Opt_FlexibleInstances
349 | Opt_ConstrainedClassMethods
350 | Opt_MultiParamTypeClasses
351 | Opt_FunctionalDependencies
353 | Opt_PolymorphicComponents
354 | Opt_ExistentialQuantification
358 | Opt_ParallelListComp
359 | Opt_TransformListComp
360 | Opt_GeneralizedNewtypeDeriving
363 | Opt_PostfixOperators
366 | Opt_LiberalTypeSynonyms
369 | Opt_ImpredicativeTypes
373 | Opt_AlternativeLayoutRule
374 | Opt_AlternativeLayoutRuleTransitional
375 | Opt_DatatypeContexts
376 | Opt_NondecreasingIndentation
380 -- | Contains not only a collection of 'DynFlag's but also a plethora of
381 -- information relating to the compilation of a single file or GHC session
382 data DynFlags = DynFlags {
385 hscTarget :: HscTarget,
386 hscOutName :: String, -- ^ Name of the output file
387 extCoreName :: String, -- ^ Name of the .hcr output file
388 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
389 optLevel :: Int, -- ^ Optimisation level
390 simplPhases :: Int, -- ^ Number of simplifier phases
391 maxSimplIterations :: Int, -- ^ Max simplifier iterations
392 shouldDumpSimplPhase :: Maybe String,
393 ruleCheck :: Maybe String,
394 strictnessBefore :: [Int], -- ^ Additional demand analysis
396 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
397 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
398 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
399 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
400 -- See CoreMonad.FloatOutSwitches
402 #ifndef OMIT_NATIVE_CODEGEN
403 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
405 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
406 importPaths :: [FilePath],
408 mainFunIs :: Maybe String,
409 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
411 dphBackend :: DPHBackend,
413 thisPackage :: PackageId, -- ^ name of package currently being compiled
416 ways :: [Way], -- ^ Way flags from the command line
417 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
418 rtsBuildTag :: String, -- ^ The RTS \"way\"
420 -- For object splitting
421 splitInfo :: Maybe (String,Int),
424 objectDir :: Maybe String,
425 dylibInstallName :: Maybe String,
426 hiDir :: Maybe String,
427 stubDir :: Maybe String,
433 outputFile :: Maybe String,
434 outputHi :: Maybe String,
435 dynLibLoader :: DynLibLoader,
437 -- | This is set by 'DriverPipeline.runPipeline' based on where
438 -- its output is going.
439 dumpPrefix :: Maybe FilePath,
441 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
442 -- Set by @-ddump-file-prefix@
443 dumpPrefixForce :: Maybe FilePath,
445 includePaths :: [String],
446 libraryPaths :: [String],
447 frameworkPaths :: [String], -- used on darwin only
448 cmdlineFrameworks :: [String], -- ditto
450 rtsOpts :: Maybe String,
451 rtsOptsEnabled :: RtsOptsEnabled,
453 hpcDir :: String, -- ^ Path to store the .mix files
455 -- options for particular phases
463 opt_windres :: [String],
464 opt_lo :: [String], -- LLVM: llvm optimiser
465 opt_lc :: [String], -- LLVM: llc static compiler
467 settings :: Settings,
470 depMakefile :: FilePath,
471 depIncludePkgDeps :: Bool,
472 depExcludeMods :: [ModuleName],
473 depSuffixes :: [String],
476 extraPkgConfs :: [FilePath],
477 -- ^ The @-package-conf@ flags given on the command line, in the order
480 packageFlags :: [PackageFlag],
481 -- ^ The @-package@ and @-hide-package@ flags from the command-line
484 -- NB. do not modify this field, it is calculated by
485 -- Packages.initPackages and Packages.updatePackages.
486 pkgDatabase :: Maybe [PackageConfig],
487 pkgState :: PackageState,
490 -- These have to be IORefs, because the defaultCleanupHandler needs to
491 -- know what to clean when an exception happens
492 filesToClean :: IORef [FilePath],
493 dirsToClean :: IORef (Map FilePath FilePath),
497 -- Don't change this without updating extensionFlags:
498 language :: Maybe Language,
499 -- Don't change this without updating extensionFlags:
500 extensions :: [OnOff ExtensionFlag],
501 -- extensionFlags should always be equal to
502 -- flattenExtensionFlags language extensions
503 extensionFlags :: [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 data Settings = Settings {
512 sGhcUsagePath :: FilePath, -- Filled in by SysTools
513 sGhciUsagePath :: FilePath, -- ditto
515 sTmpDir :: String, -- no trailing '/'
516 -- You shouldn't need to look things up in rawSettings directly.
517 -- They should have their own fields instead.
518 sRawSettings :: [(String, String)],
519 sExtraGccViaCFlags :: [String],
520 sSystemPackageConfig :: FilePath,
521 -- commands for particular phases
523 sPgm_P :: (String,[Option]),
525 sPgm_c :: (String,[Option]),
526 sPgm_s :: (String,[Option]),
527 sPgm_a :: (String,[Option]),
528 sPgm_l :: (String,[Option]),
529 sPgm_dll :: (String,[Option]),
531 sPgm_sysman :: String,
532 sPgm_windres :: String,
533 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
534 sPgm_lc :: (String,[Option]) -- LLVM: llc static compiler
537 ghcUsagePath :: DynFlags -> FilePath
538 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
539 ghciUsagePath :: DynFlags -> FilePath
540 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
541 topDir :: DynFlags -> FilePath
542 topDir dflags = sTopDir (settings dflags)
543 tmpDir :: DynFlags -> String
544 tmpDir dflags = sTmpDir (settings dflags)
545 rawSettings :: DynFlags -> [(String, String)]
546 rawSettings dflags = sRawSettings (settings dflags)
547 extraGccViaCFlags :: DynFlags -> [String]
548 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
549 systemPackageConfig :: DynFlags -> FilePath
550 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
551 pgm_L :: DynFlags -> String
552 pgm_L dflags = sPgm_L (settings dflags)
553 pgm_P :: DynFlags -> (String,[Option])
554 pgm_P dflags = sPgm_P (settings dflags)
555 pgm_F :: DynFlags -> String
556 pgm_F dflags = sPgm_F (settings dflags)
557 pgm_c :: DynFlags -> (String,[Option])
558 pgm_c dflags = sPgm_c (settings dflags)
559 pgm_s :: DynFlags -> (String,[Option])
560 pgm_s dflags = sPgm_s (settings dflags)
561 pgm_a :: DynFlags -> (String,[Option])
562 pgm_a dflags = sPgm_a (settings dflags)
563 pgm_l :: DynFlags -> (String,[Option])
564 pgm_l dflags = sPgm_l (settings dflags)
565 pgm_dll :: DynFlags -> (String,[Option])
566 pgm_dll dflags = sPgm_dll (settings dflags)
567 pgm_T :: DynFlags -> String
568 pgm_T dflags = sPgm_T (settings dflags)
569 pgm_sysman :: DynFlags -> String
570 pgm_sysman dflags = sPgm_sysman (settings dflags)
571 pgm_windres :: DynFlags -> String
572 pgm_windres dflags = sPgm_windres (settings dflags)
573 pgm_lo :: DynFlags -> (String,[Option])
574 pgm_lo dflags = sPgm_lo (settings dflags)
575 pgm_lc :: DynFlags -> (String,[Option])
576 pgm_lc dflags = sPgm_lc (settings dflags)
578 wayNames :: DynFlags -> [WayName]
579 wayNames = map wayName . ways
581 -- | The target code type of the compilation (if any).
583 -- Whenever you change the target, also make sure to set 'ghcLink' to
584 -- something sensible.
586 -- 'HscNothing' can be used to avoid generating any output, however, note
589 -- * This will not run the desugaring step, thus no warnings generated in
590 -- this step will be output. In particular, this includes warnings related
591 -- to pattern matching. You can run the desugarer manually using
592 -- 'GHC.desugarModule'.
594 -- * If a program uses Template Haskell the typechecker may try to run code
595 -- from an imported module. This will fail if no code has been generated
596 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
597 -- whether this might be the case and choose to either switch to a
598 -- different target or avoid typechecking such modules. (The latter may
599 -- preferable for security reasons.)
602 = HscC -- ^ Generate C code.
603 | HscAsm -- ^ Generate assembly using the native code generator.
604 | HscLlvm -- ^ Generate assembly using the llvm code generator.
605 | HscJava -- ^ Generate Java bytecode.
606 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
607 | HscNothing -- ^ Don't generate any code. See notes above.
610 -- | Will this target result in an object file on the disk?
611 isObjectTarget :: HscTarget -> Bool
612 isObjectTarget HscC = True
613 isObjectTarget HscAsm = True
614 isObjectTarget HscLlvm = True
615 isObjectTarget _ = False
617 -- | The 'GhcMode' tells us whether we're doing multi-module
618 -- compilation (controlled via the "GHC" API) or one-shot
619 -- (single-module) compilation. This makes a difference primarily to
620 -- the "Finder": in one-shot mode we look for interface files for
621 -- imported modules, but in multi-module mode we look for source files
622 -- in order to check whether they need to be recompiled.
624 = CompManager -- ^ @\-\-make@, GHCi, etc.
625 | OneShot -- ^ @ghc -c Foo.hs@
626 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
629 instance Outputable GhcMode where
630 ppr CompManager = ptext (sLit "CompManager")
631 ppr OneShot = ptext (sLit "OneShot")
632 ppr MkDepend = ptext (sLit "MkDepend")
634 isOneShot :: GhcMode -> Bool
635 isOneShot OneShot = True
636 isOneShot _other = False
638 -- | What to do in the link step, if there is one.
640 = NoLink -- ^ Don't link at all
641 | LinkBinary -- ^ Link object code into a binary
642 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
643 -- bytecode and object code).
644 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
647 isNoLink :: GhcLink -> Bool
648 isNoLink NoLink = True
651 -- Is it worth evaluating this Bool and caching it in the DynFlags value
652 -- during initDynFlags?
653 doingTickyProfiling :: DynFlags -> Bool
654 doingTickyProfiling _ = opt_Ticky
655 -- XXX -ticky is a static flag, because it implies -debug which is also
656 -- static. If the way flags were made dynamic, we could fix this.
659 = ExposePackage String
660 | ExposePackageId String
662 | IgnorePackage String
665 defaultHscTarget :: HscTarget
666 defaultHscTarget = defaultObjectTarget
668 -- | The 'HscTarget' value corresponding to the default way to create
669 -- object files on the current platform.
670 defaultObjectTarget :: HscTarget
672 | cGhcWithNativeCodeGen == "YES" = HscAsm
680 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
683 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
684 initDynFlags :: DynFlags -> IO DynFlags
685 initDynFlags dflags = do
686 -- someday these will be dynamic flags
687 ways <- readIORef v_Ways
688 refFilesToClean <- newIORef []
689 refDirsToClean <- newIORef Map.empty
692 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
693 rtsBuildTag = mkBuildTag ways,
694 filesToClean = refFilesToClean,
695 dirsToClean = refDirsToClean
698 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
699 -- and must be fully initialized by 'GHC.newSession' first.
700 defaultDynFlags :: Settings -> DynFlags
701 defaultDynFlags mySettings =
703 ghcMode = CompManager,
704 ghcLink = LinkBinary,
705 hscTarget = defaultHscTarget,
711 maxSimplIterations = 4,
712 shouldDumpSimplPhase = Nothing,
714 specConstrThreshold = Just 200,
715 specConstrCount = Just 3,
716 liberateCaseThreshold = Just 200,
717 floatLamArgs = Just 0, -- Default: float only if no fvs
718 strictnessBefore = [],
720 #ifndef OMIT_NATIVE_CODEGEN
721 targetPlatform = defaultTargetPlatform,
723 cmdlineHcIncludes = [],
727 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
729 dphBackend = DPHNone,
731 thisPackage = mainPackageId,
734 dylibInstallName = Nothing,
738 objectSuf = phaseInputExt StopLn,
739 hcSuf = phaseInputExt HCc,
742 outputFile = Nothing,
744 dynLibLoader = SystemDependent,
745 dumpPrefix = Nothing,
746 dumpPrefixForce = Nothing,
750 cmdlineFrameworks = [],
752 rtsOptsEnabled = RtsOptsSafeOnly,
758 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
771 pkgDatabase = Nothing,
772 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
773 ways = panic "defaultDynFlags: No ways",
774 buildTag = panic "defaultDynFlags: No buildTag",
775 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
777 settings = mySettings,
779 depMakefile = "Makefile",
780 depIncludePkgDeps = False,
783 -- end of ghc -M values
784 filesToClean = panic "defaultDynFlags: No filesToClean",
785 dirsToClean = panic "defaultDynFlags: No dirsToClean",
786 haddockOptions = Nothing,
787 flags = defaultFlags,
790 extensionFlags = flattenExtensionFlags Nothing [],
792 log_action = \severity srcSpan style msg ->
794 SevOutput -> printOutput (msg style)
795 SevInfo -> printErrs (msg style)
796 SevFatal -> printErrs (msg style)
799 printErrs ((mkLocMessage srcSpan msg) style)
800 -- careful (#2302): printErrs prints in UTF-8, whereas
801 -- converting to string first and using hPutStr would
802 -- just emit the low 8 bits of each unicode char.
806 Note [Verbosity levels]
807 ~~~~~~~~~~~~~~~~~~~~~~~
808 0 | print errors & warnings only
809 1 | minimal verbosity: print "compiling M ... done." for each module.
810 2 | equivalent to -dshow-passes
811 3 | equivalent to existing "ghc -v"
812 4 | "ghc -v -ddump-most"
813 5 | "ghc -v -ddump-all"
819 -- OnOffs accumulate in reverse order, so we use foldr in order to
820 -- process them in the right order
821 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
823 flattenExtensionFlags ml = foldr f defaultExtensionFlags
824 where f (On f) flags = f : delete f flags
825 f (Off f) flags = delete f flags
826 defaultExtensionFlags = languageExtensions ml
828 languageExtensions :: Maybe Language -> [ExtensionFlag]
830 languageExtensions Nothing
831 -- Nothing => the default case
832 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
833 -- behaviour the default, to see if anyone notices
835 -- In due course I'd like Opt_MonoLocalBinds to be on by default
836 -- But NB it's implied by GADTs etc
837 -- SLPJ September 2010
838 : Opt_NondecreasingIndentation -- This has been on by default for some time
839 : languageExtensions (Just Haskell2010)
841 languageExtensions (Just Haskell98)
842 = [Opt_ImplicitPrelude,
843 Opt_MonomorphismRestriction,
845 Opt_DatatypeContexts,
846 Opt_NondecreasingIndentation
847 -- strictly speaking non-standard, but we always had this
848 -- on implicitly before the option was added in 7.1, and
849 -- turning it off breaks code, so we're keeping it on for
850 -- backwards compatibility. Cabal uses -XHaskell98 by
851 -- default unless you specify another language.
854 languageExtensions (Just Haskell2010)
855 = [Opt_ImplicitPrelude,
856 Opt_MonomorphismRestriction,
857 Opt_DatatypeContexts,
859 Opt_ForeignFunctionInterface,
864 -- | Test whether a 'DynFlag' is set
865 dopt :: DynFlag -> DynFlags -> Bool
866 dopt f dflags = f `elem` (flags dflags)
869 dopt_set :: DynFlags -> DynFlag -> DynFlags
870 dopt_set dfs f = dfs{ flags = f : flags dfs }
872 -- | Unset a 'DynFlag'
873 dopt_unset :: DynFlags -> DynFlag -> DynFlags
874 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
876 -- | Test whether a 'ExtensionFlag' is set
877 xopt :: ExtensionFlag -> DynFlags -> Bool
878 xopt f dflags = f `elem` extensionFlags dflags
880 -- | Set a 'ExtensionFlag'
881 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
883 = let onoffs = On f : extensions dfs
884 in dfs { extensions = onoffs,
885 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
887 -- | Unset a 'ExtensionFlag'
888 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
890 = let onoffs = Off f : extensions dfs
891 in dfs { extensions = onoffs,
892 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
894 setLanguage :: Language -> DynP ()
895 setLanguage l = upd f
896 where f dfs = let mLang = Just l
897 oneoffs = extensions dfs
900 extensionFlags = flattenExtensionFlags mLang oneoffs
903 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
904 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
905 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
906 -> [a] -- ^ Correctly ordered extracted options
907 getOpts dflags opts = reverse (opts dflags)
908 -- We add to the options from the front, so we need to reverse the list
910 -- | Gets the verbosity flag for the current verbosity level. This is fed to
911 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
912 getVerbFlags :: DynFlags -> [String]
914 | verbosity dflags >= 4 = ["-v"]
917 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
918 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
919 setPgmP, addOptl, addOptP,
920 addCmdlineFramework, addHaddockOpts
921 :: String -> DynFlags -> DynFlags
922 setOutputFile, setOutputHi, setDumpPrefixForce
923 :: Maybe String -> DynFlags -> DynFlags
925 setObjectDir f d = d{ objectDir = Just f}
926 setHiDir f d = d{ hiDir = Just f}
927 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
928 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
929 -- \#included from the .hc file when compiling via C (i.e. unregisterised
931 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
932 setDylibInstallName f d = d{ dylibInstallName = Just f}
934 setObjectSuf f d = d{ objectSuf = f}
935 setHiSuf f d = d{ hiSuf = f}
936 setHcSuf f d = d{ hcSuf = f}
938 setOutputFile f d = d{ outputFile = f}
939 setOutputHi f d = d{ outputHi = f}
941 parseDynLibLoaderMode f d =
943 ("deploy", "") -> d{ dynLibLoader = Deployable }
944 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
945 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
947 setDumpPrefixForce f d = d { dumpPrefixForce = f}
949 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
950 -- Config.hs should really use Option.
951 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
952 addOptl f d = d{ opt_l = f : opt_l d}
953 addOptP f d = d{ opt_P = f : opt_P d}
956 setDepMakefile :: FilePath -> DynFlags -> DynFlags
957 setDepMakefile f d = d { depMakefile = deOptDep f }
959 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
960 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
962 addDepExcludeMod :: String -> DynFlags -> DynFlags
964 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
966 addDepSuffix :: FilePath -> DynFlags -> DynFlags
967 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
970 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
971 -- we need to strip the "-optdep" off of the arg
972 deOptDep :: String -> String
973 deOptDep x = case stripPrefix "-optdep" x of
977 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
979 addHaddockOpts f d = d{ haddockOptions = Just f}
981 -- -----------------------------------------------------------------------------
982 -- Command-line options
984 -- | When invoking external tools as part of the compilation pipeline, we
985 -- pass these a sequence of options on the command-line. Rather than
986 -- just using a list of Strings, we use a type that allows us to distinguish
987 -- between filepaths and 'other stuff'. The reason for this is that
988 -- this type gives us a handle on transforming filenames, and filenames only,
989 -- to whatever format they're expected to be on a particular platform.
991 = FileOption -- an entry that _contains_ filename(s) / filepaths.
992 String -- a non-filepath prefix that shouldn't be
993 -- transformed (e.g., "/out=")
994 String -- the filepath/filename portion
997 showOpt :: Option -> String
998 showOpt (FileOption pre f) = pre ++ f
999 showOpt (Option s) = s
1001 -----------------------------------------------------------------------------
1002 -- Setting the optimisation level
1004 updOptLevel :: Int -> DynFlags -> DynFlags
1005 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1007 = dfs2{ optLevel = final_n }
1009 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1010 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1011 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1013 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1014 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1016 -- -----------------------------------------------------------------------------
1017 -- StgToDo: abstraction of stg-to-stg passes to run.
1020 = StgDoMassageForProfiling -- should be (next to) last
1021 -- There's also setStgVarInfo, but its absolute "lastness"
1022 -- is so critical that it is hardwired in (no flag).
1025 getStgToDo :: DynFlags -> [StgToDo]
1029 stg_stats = dopt Opt_StgStats dflags
1031 todo1 = if stg_stats then [D_stg_stats] else []
1033 todo2 | WayProf `elem` wayNames dflags
1034 = StgDoMassageForProfiling : todo1
1038 {- **********************************************************************
1042 %********************************************************************* -}
1044 -- -----------------------------------------------------------------------------
1045 -- Parsing the dynamic flags.
1047 -- | Parse dynamic flags from a list of command line arguments. Returns the
1048 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1049 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1050 -- flags or missing arguments).
1051 parseDynamicFlags :: Monad m =>
1052 DynFlags -> [Located String]
1053 -> m (DynFlags, [Located String], [Located String])
1054 -- ^ Updated 'DynFlags', left-over arguments, and
1055 -- list of warnings.
1056 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1058 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1059 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1060 parseDynamicNoPackageFlags :: Monad m =>
1061 DynFlags -> [Located String]
1062 -> m (DynFlags, [Located String], [Located String])
1063 -- ^ Updated 'DynFlags', left-over arguments, and
1064 -- list of warnings.
1065 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1067 parseDynamicFlags_ :: Monad m =>
1068 DynFlags -> [Located String] -> Bool
1069 -> m (DynFlags, [Located String], [Located String])
1070 parseDynamicFlags_ dflags0 args pkg_flags = do
1071 -- XXX Legacy support code
1072 -- We used to accept things like
1073 -- optdep-f -optdepdepend
1074 -- optdep-f -optdep depend
1075 -- optdep -f -optdepdepend
1076 -- optdep -f -optdep depend
1077 -- but the spaces trip up proper argument handling. So get rid of them.
1078 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1079 f (x : xs) = x : f xs
1083 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1084 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1085 | otherwise = dynamic_flags
1087 let ((leftover, errs, warns), dflags1)
1088 = runCmdLine (processArgs flag_spec args') dflags0
1089 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1091 let (pic_warns, dflags2)
1092 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1093 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1094 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1095 ++ "dynamic on this platform;\n ignoring -fllvm"],
1096 dflags1{ hscTarget = HscAsm })
1098 | otherwise = ([], dflags1)
1100 return (dflags2, leftover, pic_warns ++ warns)
1103 {- **********************************************************************
1105 DynFlags specifications
1107 %********************************************************************* -}
1109 allFlags :: [String]
1110 allFlags = map ('-':) $
1111 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1112 map ("fno-"++) flags ++
1113 map ("f"++) flags ++
1114 map ("f"++) flags' ++
1115 map ("X"++) supportedExtensions
1116 where ok (PrefixPred _ _) = False
1118 flags = [ name | (name, _, _) <- fFlags ]
1119 flags' = [ name | (name, _, _) <- fLangFlags ]
1121 --------------- The main flags themselves ------------------
1122 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1124 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1125 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1126 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1128 (HasArg (\s -> do { addCmdlineHCInclude s
1129 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1130 , Flag "v" (OptIntSuffix setVerbosity)
1132 ------- Specific phases --------------------------------------------
1133 -- need to appear before -pgmL to be parsed as LLVM flags.
1134 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1135 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1136 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1137 , Flag "pgmP" (hasArg setPgmP)
1138 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1139 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1140 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1141 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1142 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1143 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1144 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1145 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1147 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1148 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1149 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1150 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1151 , Flag "optP" (hasArg addOptP)
1152 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1153 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1154 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1155 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1156 , Flag "optl" (hasArg addOptl)
1157 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1160 (NoArg (if can_split
1161 then setDynFlag Opt_SplitObjs
1162 else addWarn "ignoring -fsplit-objs"))
1164 -------- ghc -M -----------------------------------------------------
1165 , Flag "dep-suffix" (hasArg addDepSuffix)
1166 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1167 , Flag "dep-makefile" (hasArg setDepMakefile)
1168 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1169 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1170 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1171 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1172 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1173 , Flag "exclude-module" (hasArg addDepExcludeMod)
1174 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1175 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1177 -------- Linking ----------------------------------------------------
1178 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1179 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1180 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1181 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1183 ------- Libraries ---------------------------------------------------
1184 , Flag "L" (Prefix addLibraryPath)
1185 , Flag "l" (AnySuffix (upd . addOptl))
1187 ------- Frameworks --------------------------------------------------
1188 -- -framework-path should really be -F ...
1189 , Flag "framework-path" (HasArg addFrameworkPath)
1190 , Flag "framework" (hasArg addCmdlineFramework)
1192 ------- Output Redirection ------------------------------------------
1193 , Flag "odir" (hasArg setObjectDir)
1194 , Flag "o" (SepArg (upd . setOutputFile . Just))
1195 , Flag "ohi" (hasArg (setOutputHi . Just ))
1196 , Flag "osuf" (hasArg setObjectSuf)
1197 , Flag "hcsuf" (hasArg setHcSuf)
1198 , Flag "hisuf" (hasArg setHiSuf)
1199 , Flag "hidir" (hasArg setHiDir)
1200 , Flag "tmpdir" (hasArg setTmpDir)
1201 , Flag "stubdir" (hasArg setStubDir)
1202 , Flag "outputdir" (hasArg setOutputDir)
1203 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1205 ------- Keeping temporary files -------------------------------------
1206 -- These can be singular (think ghc -c) or plural (think ghc --make)
1207 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1208 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1209 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1210 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1211 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1212 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1213 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1214 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1215 -- This only makes sense as plural
1216 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1218 ------- Miscellaneous ----------------------------------------------
1219 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1220 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1221 , Flag "with-rtsopts" (HasArg setRtsOpts)
1222 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1223 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1224 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1225 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1226 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1227 , Flag "main-is" (SepArg setMainIs)
1228 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1229 , Flag "haddock-opts" (hasArg addHaddockOpts)
1230 , Flag "hpcdir" (SepArg setOptHpcDir)
1232 ------- recompilation checker --------------------------------------
1233 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1234 ; deprecate "Use -fno-force-recomp instead" }))
1235 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1236 ; deprecate "Use -fforce-recomp instead" }))
1238 ------ HsCpp opts ---------------------------------------------------
1239 , Flag "D" (AnySuffix (upd . addOptP))
1240 , Flag "U" (AnySuffix (upd . addOptP))
1242 ------- Include/Import Paths ----------------------------------------
1243 , Flag "I" (Prefix addIncludePath)
1244 , Flag "i" (OptPrefix addImportPath)
1246 ------ Debugging ----------------------------------------------------
1247 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1249 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1250 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1251 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1252 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1253 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1254 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1255 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1256 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1257 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1258 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1259 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1260 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1261 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1262 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1263 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1264 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1265 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1266 ; setDumpFlag' Opt_D_dump_llvm}))
1267 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1268 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1269 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1270 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1271 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1272 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1273 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1274 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1275 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1276 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1277 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1278 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1279 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1280 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1281 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1282 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1283 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1284 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1285 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1286 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1287 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1288 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1289 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1290 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1291 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1292 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1293 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1294 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1295 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1296 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1297 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1298 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1299 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1300 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1301 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1302 ; setVerboseCore2Core }))
1303 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1304 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1305 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1306 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1307 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1308 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1309 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1310 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1311 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1312 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1313 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1314 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1315 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1316 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1317 , Flag "dshow-passes" (NoArg (do forceRecompile
1318 setVerbosity (Just 2)))
1319 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1321 ------ Machine dependant (-m<blah>) stuff ---------------------------
1323 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1324 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1325 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1326 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1328 ------ Warning opts -------------------------------------------------
1329 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1330 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1331 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1332 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1333 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1334 ; deprecate "Use -w instead" }))
1335 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1337 ------ Optimisation flags ------------------------------------------
1338 , Flag "O" (noArg (setOptLevel 1))
1339 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1340 , Flag "Odph" (noArg setDPHOpt)
1341 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1342 -- If the number is missing, use 1
1344 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1345 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1346 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1347 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1348 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1349 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1350 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1351 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1352 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1353 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1354 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1355 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1356 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1358 ------ Profiling ----------------------------------------------------
1360 -- XXX Should the -f* flags be deprecated?
1361 -- They don't seem to be documented
1362 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1363 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1364 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1365 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1366 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1367 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1368 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1369 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1370 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1372 ------ DPH flags ----------------------------------------------------
1374 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1375 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1376 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1377 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1379 ------ Compiler flags -----------------------------------------------
1381 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1382 , Flag "fvia-c" (NoArg
1383 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1384 , Flag "fvia-C" (NoArg
1385 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1386 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1388 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1389 setTarget HscNothing))
1390 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1391 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1392 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1393 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1395 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1396 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1397 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1398 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1399 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1400 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1401 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1403 package_flags :: [Flag (CmdLineP DynFlags)]
1405 ------- Packages ----------------------------------------------------
1406 Flag "package-conf" (HasArg extraPkgConf_)
1407 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1408 , Flag "package-name" (hasArg setPackageName)
1409 , Flag "package-id" (HasArg exposePackageId)
1410 , Flag "package" (HasArg exposePackage)
1411 , Flag "hide-package" (HasArg hidePackage)
1412 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1413 , Flag "ignore-package" (HasArg ignorePackage)
1414 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1415 ; deprecate "Use -package instead" }))
1418 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1419 -- False <=> we are turning the flag off
1420 turnOn :: TurnOnFlag; turnOn = True
1421 turnOff :: TurnOnFlag; turnOff = False
1424 = ( String -- Flag in string form
1425 , flag -- Flag in internal form
1426 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1427 -- Typically, emit a warning or error
1429 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1430 -> String -- ^ The flag prefix
1431 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1432 -> FlagSpec flag -- ^ Specification of this particular flag
1433 -> Flag (CmdLineP DynFlags)
1434 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1435 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1437 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1438 deprecatedForExtension lang turn_on
1439 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1441 flag | turn_on = lang
1442 | otherwise = "No"++lang
1444 useInstead :: String -> TurnOnFlag -> DynP ()
1445 useInstead flag turn_on
1446 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1448 no = if turn_on then "" else "no-"
1450 nop :: TurnOnFlag -> DynP ()
1453 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1454 fFlags :: [FlagSpec DynFlag]
1456 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1457 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1458 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1459 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1460 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1461 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1462 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1463 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1464 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1465 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1466 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1467 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1468 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1469 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1470 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1471 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1472 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1473 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1474 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1475 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1476 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1477 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1478 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1479 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1480 ( "warn-orphans", Opt_WarnOrphans, nop ),
1481 ( "warn-identities", Opt_WarnIdentities, nop ),
1482 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1483 ( "warn-tabs", Opt_WarnTabs, nop ),
1484 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1485 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1486 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1487 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1488 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1489 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1490 ( "strictness", Opt_Strictness, nop ),
1491 ( "specialise", Opt_Specialise, nop ),
1492 ( "float-in", Opt_FloatIn, nop ),
1493 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1494 ( "full-laziness", Opt_FullLaziness, nop ),
1495 ( "liberate-case", Opt_LiberateCase, nop ),
1496 ( "spec-constr", Opt_SpecConstr, nop ),
1497 ( "cse", Opt_CSE, nop ),
1498 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1499 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1500 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1501 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1502 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1503 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1504 ( "case-merge", Opt_CaseMerge, nop ),
1505 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1506 ( "method-sharing", Opt_MethodSharing,
1507 \_ -> deprecate "doesn't do anything any more"),
1508 -- Remove altogether in GHC 7.2
1509 ( "dicts-cheap", Opt_DictsCheap, nop ),
1510 ( "excess-precision", Opt_ExcessPrecision, nop ),
1511 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1512 ( "print-bind-result", Opt_PrintBindResult, nop ),
1513 ( "force-recomp", Opt_ForceRecomp, nop ),
1514 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1515 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1516 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1517 ( "break-on-exception", Opt_BreakOnException, nop ),
1518 ( "break-on-error", Opt_BreakOnError, nop ),
1519 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1520 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1521 ( "run-cps", Opt_RunCPS, nop ),
1522 ( "run-cpsz", Opt_RunCPSZ, nop ),
1523 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1524 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1525 ( "vectorise", Opt_Vectorise, nop ),
1526 ( "regs-graph", Opt_RegsGraph, nop ),
1527 ( "regs-iterative", Opt_RegsIterative, nop ),
1528 ( "gen-manifest", Opt_GenManifest, nop ),
1529 ( "embed-manifest", Opt_EmbedManifest, nop ),
1530 ( "ext-core", Opt_EmitExternalCore, nop ),
1531 ( "shared-implib", Opt_SharedImplib, nop ),
1532 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1533 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1534 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1535 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1538 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1539 fLangFlags :: [FlagSpec ExtensionFlag]
1541 ( "th", Opt_TemplateHaskell,
1542 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1543 ( "fi", Opt_ForeignFunctionInterface,
1544 deprecatedForExtension "ForeignFunctionInterface" ),
1545 ( "ffi", Opt_ForeignFunctionInterface,
1546 deprecatedForExtension "ForeignFunctionInterface" ),
1547 ( "arrows", Opt_Arrows,
1548 deprecatedForExtension "Arrows" ),
1549 ( "generics", Opt_Generics,
1550 deprecatedForExtension "Generics" ),
1551 ( "implicit-prelude", Opt_ImplicitPrelude,
1552 deprecatedForExtension "ImplicitPrelude" ),
1553 ( "bang-patterns", Opt_BangPatterns,
1554 deprecatedForExtension "BangPatterns" ),
1555 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1556 deprecatedForExtension "MonomorphismRestriction" ),
1557 ( "mono-pat-binds", Opt_MonoPatBinds,
1558 deprecatedForExtension "MonoPatBinds" ),
1559 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1560 deprecatedForExtension "ExtendedDefaultRules" ),
1561 ( "implicit-params", Opt_ImplicitParams,
1562 deprecatedForExtension "ImplicitParams" ),
1563 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1564 deprecatedForExtension "ScopedTypeVariables" ),
1565 ( "parr", Opt_ParallelArrays,
1566 deprecatedForExtension "ParallelArrays" ),
1567 ( "PArr", Opt_ParallelArrays,
1568 deprecatedForExtension "ParallelArrays" ),
1569 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1570 deprecatedForExtension "OverlappingInstances" ),
1571 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1572 deprecatedForExtension "UndecidableInstances" ),
1573 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1574 deprecatedForExtension "IncoherentInstances" )
1577 supportedLanguages :: [String]
1578 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1580 supportedExtensions :: [String]
1581 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1583 supportedLanguagesAndExtensions :: [String]
1584 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1586 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1587 languageFlags :: [FlagSpec Language]
1589 ( "Haskell98", Haskell98, nop ),
1590 ( "Haskell2010", Haskell2010, nop )
1593 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1594 xFlags :: [FlagSpec ExtensionFlag]
1596 ( "CPP", Opt_Cpp, nop ),
1597 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1598 ( "TupleSections", Opt_TupleSections, nop ),
1599 ( "PatternGuards", Opt_PatternGuards, nop ),
1600 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1601 ( "MagicHash", Opt_MagicHash, nop ),
1602 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1603 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1604 ( "KindSignatures", Opt_KindSignatures, nop ),
1605 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1606 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1607 ( "TransformListComp", Opt_TransformListComp, nop ),
1608 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1609 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1610 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1611 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1612 ( "Rank2Types", Opt_Rank2Types, nop ),
1613 ( "RankNTypes", Opt_RankNTypes, nop ),
1614 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1615 ( "TypeOperators", Opt_TypeOperators, nop ),
1616 ( "RecursiveDo", Opt_RecursiveDo,
1617 deprecatedForExtension "DoRec"),
1618 ( "DoRec", Opt_DoRec, nop ),
1619 ( "Arrows", Opt_Arrows, nop ),
1620 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1621 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1622 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1623 ( "Generics", Opt_Generics, nop ),
1624 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1625 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1626 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1627 ( "RecordPuns", Opt_RecordPuns,
1628 deprecatedForExtension "NamedFieldPuns" ),
1629 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1630 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1631 ( "GADTs", Opt_GADTs, nop ),
1632 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1633 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1634 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1635 ( "BangPatterns", Opt_BangPatterns, nop ),
1636 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1637 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1638 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1639 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1640 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1641 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1642 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1643 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1644 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1645 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1646 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1647 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1648 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1649 \ turn_on -> if not turn_on
1650 then deprecate "You can't turn off RelaxedPolyRec any more"
1652 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1653 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1654 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1656 ( "PatternSignatures", Opt_ScopedTypeVariables,
1657 deprecatedForExtension "ScopedTypeVariables" ),
1659 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1660 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1661 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1662 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1663 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1664 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1665 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1666 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1667 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1668 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1669 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1670 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1671 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1672 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1673 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1674 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1675 ( "PackageImports", Opt_PackageImports, nop )
1678 defaultFlags :: [DynFlag]
1680 = [ Opt_AutoLinkPackages,
1681 Opt_ReadUserPackageConf,
1685 #if GHC_DEFAULT_NEW_CODEGEN
1691 Opt_PrintBindContents,
1696 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1697 -- The default -O0 options
1701 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1703 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1704 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1705 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1706 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1707 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1708 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1709 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1710 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1712 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1714 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1715 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1716 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1718 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1719 -- all over the place
1721 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1723 -- Record wild-cards implies field disambiguation
1724 -- Otherwise if you write (C {..}) you may well get
1725 -- stuff like " 'a' not in scope ", which is a bit silly
1726 -- if the compiler has just filled in field 'a' of constructor 'C'
1727 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1729 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1732 optLevelFlags :: [([Int], DynFlag)]
1734 = [ ([0], Opt_IgnoreInterfacePragmas)
1735 , ([0], Opt_OmitInterfacePragmas)
1737 , ([1,2], Opt_IgnoreAsserts)
1738 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1740 , ([1,2], Opt_DoEtaReduction)
1741 , ([1,2], Opt_CaseMerge)
1742 , ([1,2], Opt_Strictness)
1744 , ([1,2], Opt_FullLaziness)
1745 , ([1,2], Opt_Specialise)
1746 , ([1,2], Opt_FloatIn)
1748 , ([2], Opt_LiberateCase)
1749 , ([2], Opt_SpecConstr)
1750 , ([2], Opt_RegsGraph)
1752 -- , ([2], Opt_StaticArgumentTransformation)
1753 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1754 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1755 -- several improvements to the heuristics, and I'm concerned that without
1756 -- those changes SAT will interfere with some attempts to write "high
1757 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1758 -- this year. In particular, the version in HEAD lacks the tail call
1759 -- criterion, so many things that look like reasonable loops will be
1760 -- turned into functions with extra (unneccesary) thunk creation.
1762 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1763 -- This one is important for a tiresome reason:
1764 -- we want to make sure that the bindings for data
1765 -- constructors are eta-expanded. This is probably
1766 -- a good thing anyway, but it seems fragile.
1769 -- -----------------------------------------------------------------------------
1770 -- Standard sets of warning options
1772 standardWarnings :: [DynFlag]
1774 = [ Opt_WarnWarningsDeprecations,
1775 Opt_WarnDeprecatedFlags,
1776 Opt_WarnUnrecognisedPragmas,
1777 Opt_WarnOverlappingPatterns,
1778 Opt_WarnMissingFields,
1779 Opt_WarnMissingMethods,
1780 Opt_WarnDuplicateExports,
1781 Opt_WarnLazyUnliftedBindings,
1782 Opt_WarnDodgyForeignImports,
1783 Opt_WarnWrongDoBind,
1784 Opt_WarnAlternativeLayoutRuleTransitional
1787 minusWOpts :: [DynFlag]
1788 -- Things you get with -W
1790 = standardWarnings ++
1791 [ Opt_WarnUnusedBinds,
1792 Opt_WarnUnusedMatches,
1793 Opt_WarnUnusedImports,
1794 Opt_WarnIncompletePatterns,
1795 Opt_WarnDodgyExports,
1796 Opt_WarnDodgyImports
1799 minusWallOpts :: [DynFlag]
1800 -- Things you get with -Wall
1803 [ Opt_WarnTypeDefaults,
1804 Opt_WarnNameShadowing,
1805 Opt_WarnMissingSigs,
1808 Opt_WarnUnusedDoBind
1811 minuswRemovesOpts :: [DynFlag]
1812 -- minuswRemovesOpts should be every warning option
1816 Opt_WarnIncompletePatternsRecUpd,
1817 Opt_WarnIncompleteUniPatterns,
1818 Opt_WarnMonomorphism,
1819 Opt_WarnUnrecognisedPragmas,
1820 Opt_WarnAutoOrphans,
1821 Opt_WarnImplicitPrelude
1824 enableGlasgowExts :: DynP ()
1825 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1826 mapM_ setExtensionFlag glasgowExtsFlags
1828 disableGlasgowExts :: DynP ()
1829 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1830 mapM_ unSetExtensionFlag glasgowExtsFlags
1832 glasgowExtsFlags :: [ExtensionFlag]
1833 glasgowExtsFlags = [
1834 Opt_ForeignFunctionInterface
1835 , Opt_UnliftedFFITypes
1836 , Opt_ImplicitParams
1837 , Opt_ScopedTypeVariables
1839 , Opt_TypeSynonymInstances
1840 , Opt_StandaloneDeriving
1841 , Opt_DeriveDataTypeable
1843 , Opt_DeriveFoldable
1844 , Opt_DeriveTraversable
1845 , Opt_FlexibleContexts
1846 , Opt_FlexibleInstances
1847 , Opt_ConstrainedClassMethods
1848 , Opt_MultiParamTypeClasses
1849 , Opt_FunctionalDependencies
1851 , Opt_PolymorphicComponents
1852 , Opt_ExistentialQuantification
1854 , Opt_PostfixOperators
1856 , Opt_LiberalTypeSynonyms
1860 , Opt_ParallelListComp
1861 , Opt_EmptyDataDecls
1862 , Opt_KindSignatures
1863 , Opt_GeneralizedNewtypeDeriving ]
1866 -- Consult the RTS to find whether GHC itself has been built profiled
1867 -- If so, you can't use Template Haskell
1868 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1870 rtsIsProfiled :: Bool
1871 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1873 checkTemplateHaskellOk :: Bool -> DynP ()
1874 checkTemplateHaskellOk turn_on
1875 | turn_on && rtsIsProfiled
1876 = addErr "You can't use Template Haskell with a profiled compiler"
1880 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1881 -- so we simply say "ok". It doesn't matter because TH isn't
1882 -- available in stage 1 anyway.
1883 checkTemplateHaskellOk turn_on = return ()
1886 {- **********************************************************************
1888 DynFlags constructors
1890 %********************************************************************* -}
1892 type DynP = EwM (CmdLineP DynFlags)
1894 upd :: (DynFlags -> DynFlags) -> DynP ()
1895 upd f = liftEwM (do { dfs <- getCmdLineState
1896 ; putCmdLineState $! (f dfs) })
1898 --------------- Constructor functions for OptKind -----------------
1899 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1900 noArg fn = NoArg (upd fn)
1902 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1903 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1905 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1906 hasArg fn = HasArg (upd . fn)
1908 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1909 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1910 ; deprecate deprec })
1912 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1913 intSuffix fn = IntSuffix (\n -> upd (fn n))
1915 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1916 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1918 --------------------------
1919 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1920 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1921 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1923 --------------------------
1924 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1925 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1928 deps = [ if turn_on then setExtensionFlag d
1929 else unSetExtensionFlag d
1930 | (f', turn_on, d) <- impliedFlags, f' == f ]
1931 -- When you set f, set the ones it implies
1932 -- NB: use setExtensionFlag recursively, in case the implied flags
1933 -- implies further flags
1935 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1936 -- When you un-set f, however, we don't un-set the things it implies
1937 -- (except for -fno-glasgow-exts, which is treated specially)
1939 --------------------------
1940 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
1941 alterSettings f dflags = dflags { settings = f (settings dflags) }
1943 --------------------------
1944 setDumpFlag' :: DynFlag -> DynP ()
1945 setDumpFlag' dump_flag
1946 = do { setDynFlag dump_flag
1947 ; when want_recomp forceRecompile }
1949 -- Certain dumpy-things are really interested in what's going
1950 -- on during recompilation checking, so in those cases we
1951 -- don't want to turn it off.
1952 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1953 Opt_D_dump_hi_diffs]
1955 forceRecompile :: DynP ()
1956 -- Whenver we -ddump, force recompilation (by switching off the
1957 -- recompilation checker), else you don't see the dump! However,
1958 -- don't switch it off in --make mode, else *everything* gets
1959 -- recompiled which probably isn't what you want
1960 forceRecompile = do { dfs <- liftEwM getCmdLineState
1961 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1963 force_recomp dfs = isOneShot (ghcMode dfs)
1965 setVerboseCore2Core :: DynP ()
1966 setVerboseCore2Core = do forceRecompile
1967 setDynFlag Opt_D_verbose_core2core
1968 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1971 setDumpSimplPhases :: String -> DynP ()
1972 setDumpSimplPhases s = do forceRecompile
1973 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1975 spec = case s of { ('=' : s') -> s'; _ -> s }
1977 setVerbosity :: Maybe Int -> DynP ()
1978 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1980 addCmdlineHCInclude :: String -> DynP ()
1981 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1983 extraPkgConf_ :: FilePath -> DynP ()
1984 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1986 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1988 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1990 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1992 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1994 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1996 setPackageName :: String -> DynFlags -> DynFlags
1997 setPackageName p s = s{ thisPackage = stringToPackageId p }
1999 -- If we're linking a binary, then only targets that produce object
2000 -- code are allowed (requests for other target types are ignored).
2001 setTarget :: HscTarget -> DynP ()
2002 setTarget l = upd set
2005 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2008 -- Changes the target only if we're compiling object code. This is
2009 -- used by -fasm and -fllvm, which switch from one to the other, but
2010 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2011 -- can be safely used in an OPTIONS_GHC pragma.
2012 setObjTarget :: HscTarget -> DynP ()
2013 setObjTarget l = upd set
2016 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2019 setOptLevel :: Int -> DynFlags -> DynFlags
2020 setOptLevel n dflags
2021 | hscTarget dflags == HscInterpreted && n > 0
2023 -- not in IO any more, oh well:
2024 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2026 = updOptLevel n dflags
2029 -- -Odph is equivalent to
2031 -- -O2 optimise as much as possible
2032 -- -fmax-simplifier-iterations20 this is necessary sometimes
2033 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2035 setDPHOpt :: DynFlags -> DynFlags
2036 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2040 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2041 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2042 -- vectoriser cannot be used.
2044 data DPHBackend = DPHPar -- "dph-par"
2045 | DPHSeq -- "dph-seq"
2046 | DPHThis -- the currently compiled package
2047 | DPHNone -- no DPH library available
2048 deriving(Eq, Ord, Enum, Show)
2050 setDPHBackend :: DPHBackend -> DynP ()
2051 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2053 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2055 dphPackageMaybe :: DynFlags -> Maybe PackageId
2056 dphPackageMaybe dflags
2057 = case dphBackend dflags of
2058 DPHPar -> Just dphParPackageId
2059 DPHSeq -> Just dphSeqPackageId
2060 DPHThis -> Just (thisPackage dflags)
2063 setMainIs :: String -> DynP ()
2065 | not (null main_fn) && isLower (head main_fn)
2066 -- The arg looked like "Foo.Bar.baz"
2067 = upd $ \d -> d{ mainFunIs = Just main_fn,
2068 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2070 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2071 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2073 | otherwise -- The arg looked like "baz"
2074 = upd $ \d -> d{ mainFunIs = Just arg }
2076 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2078 -----------------------------------------------------------------------------
2079 -- Paths & Libraries
2081 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2083 -- -i on its own deletes the import paths
2084 addImportPath "" = upd (\s -> s{importPaths = []})
2085 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2089 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2092 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2094 addFrameworkPath p =
2095 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2097 #ifndef mingw32_TARGET_OS
2098 split_marker :: Char
2099 split_marker = ':' -- not configurable (ToDo)
2102 splitPathList :: String -> [String]
2103 splitPathList s = filter notNull (splitUp s)
2104 -- empty paths are ignored: there might be a trailing
2105 -- ':' in the initial list, for example. Empty paths can
2106 -- cause confusion when they are translated into -I options
2107 -- for passing to gcc.
2109 #ifndef mingw32_TARGET_OS
2110 splitUp xs = split split_marker xs
2112 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2114 -- That is, if "foo:bar:baz" is used, this interpreted as
2115 -- consisting of three entries, 'foo', 'bar', 'baz'.
2116 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2117 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2119 -- Notice that no attempt is made to fully replace the 'standard'
2120 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2121 -- that this will cause too much breakage for users & ':' will
2122 -- work fine even with DOS paths, if you're not insisting on being silly.
2125 splitUp (x:':':div:xs) | div `elem` dir_markers
2126 = ((x:':':div:p): splitUp rs)
2128 (p,rs) = findNextPath xs
2129 -- we used to check for existence of the path here, but that
2130 -- required the IO monad to be threaded through the command-line
2131 -- parser which is quite inconvenient. The
2132 splitUp xs = cons p (splitUp rs)
2134 (p,rs) = findNextPath xs
2139 -- will be called either when we've consumed nought or the
2140 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2141 -- finding the next split marker.
2143 case break (`elem` split_markers) xs of
2144 (p, _:ds) -> (p, ds)
2147 split_markers :: [Char]
2148 split_markers = [':', ';']
2150 dir_markers :: [Char]
2151 dir_markers = ['/', '\\']
2154 -- -----------------------------------------------------------------------------
2155 -- tmpDir, where we store temporary files.
2157 setTmpDir :: FilePath -> DynFlags -> DynFlags
2158 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2159 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2160 -- seem necessary now --SDM 7/2/2008
2162 -----------------------------------------------------------------------------
2165 setRtsOpts :: String -> DynP ()
2166 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2168 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2169 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2171 -----------------------------------------------------------------------------
2174 setOptHpcDir :: String -> DynP ()
2175 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2177 -----------------------------------------------------------------------------
2178 -- Via-C compilation stuff
2180 -- There are some options that we need to pass to gcc when compiling
2181 -- Haskell code via C, but are only supported by recent versions of
2182 -- gcc. The configure script decides which of these options we need,
2183 -- and puts them in the "settings" file in $topdir. The advantage of
2184 -- having these in a separate file is that the file can be created at
2185 -- install-time depending on the available gcc version, and even
2186 -- re-generated later if gcc is upgraded.
2188 -- The options below are not dependent on the version of gcc, only the
2191 machdepCCOpts :: DynFlags -> [String] -- flags for all C compilations
2192 machdepCCOpts dflags = cCcOpts ++ machdepCCOpts'
2194 machdepCCOpts' :: [String] -- flags for all C compilations
2196 #if alpha_TARGET_ARCH
2198 #ifdef HAVE_THREADED_RTS_SUPPORT
2202 -- For now, to suppress the gcc warning "call-clobbered
2203 -- register used for global register variable", we simply
2204 -- disable all warnings altogether using the -w flag. Oh well.
2206 #elif hppa_TARGET_ARCH
2207 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2208 -- (very nice, but too bad the HP /usr/include files don't agree.)
2209 = ["-D_HPUX_SOURCE"]
2211 #elif i386_TARGET_ARCH
2212 -- -fno-defer-pop : basically the same game as for m68k
2214 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2215 -- the fp (%ebp) for our register maps.
2216 = if opt_Static then ["-DDONT_WANT_WIN32_DLL_SUPPORT"] else []
2222 picCCOpts :: DynFlags -> [String]
2224 #if darwin_TARGET_OS
2225 -- Apple prefers to do things the other way round.
2226 -- PIC is on by default.
2227 -- -mdynamic-no-pic:
2228 -- Turn off PIC code generation.
2230 -- Don't generate "common" symbols - these are unwanted
2231 -- in dynamic libraries.
2234 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2236 = ["-mdynamic-no-pic"]
2237 #elif mingw32_TARGET_OS
2238 -- no -fPIC for Windows
2240 = ["-U __PIC__","-D__PIC__"]
2244 -- we need -fPIC for C files when we are compiling with -dynamic,
2245 -- otherwise things like stub.c files don't get compiled
2246 -- correctly. They need to reference data in the Haskell
2247 -- objects, but can't without -fPIC. See
2248 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2249 | opt_PIC || not opt_Static
2250 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2255 -- -----------------------------------------------------------------------------
2259 can_split = cSupportsSplitObjs == "YES"
2261 -- -----------------------------------------------------------------------------
2264 compilerInfo :: DynFlags -> [(String, String)]
2266 = -- We always make "Project name" be first to keep parsing in
2267 -- other languages simple, i.e. when looking for other fields,
2268 -- you don't have to worry whether there is a leading '[' or not
2269 ("Project name", cProjectName)
2270 -- Next come the settings, so anything else can be overridden
2271 -- in the settings file (as "lookup" uses the first match for the
2273 : rawSettings dflags
2274 ++ [("Project version", cProjectVersion),
2275 ("Booter version", cBooterVersion),
2277 ("Build platform", cBuildPlatformString),
2278 ("Host platform", cHostPlatformString),
2279 ("Target platform", cTargetPlatformString),
2280 ("Have interpreter", cGhcWithInterpreter),
2281 ("Object splitting supported", cSupportsSplitObjs),
2282 ("Have native code generator", cGhcWithNativeCodeGen),
2283 ("Support SMP", cGhcWithSMP),
2284 ("Unregisterised", cGhcUnregisterised),
2285 ("Tables next to code", cGhcEnableTablesNextToCode),
2286 ("RTS ways", cGhcRTSWays),
2287 ("Leading underscore", cLeadingUnderscore),
2288 ("Debug on", show debugIsOn),
2289 ("LibDir", topDir dflags),
2290 ("Global Package DB", systemPackageConfig dflags),
2291 ("C compiler flags", show cCcOpts),
2292 ("Gcc Linker flags", show cGccLinkerOpts),
2293 ("Ld Linker flags", show cLdLinkerOpts)