5 -- (c) The University of Glasgow 2005
8 -- Most flags are dynamic flags, which means they can change from
9 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
10 -- multi-session GHC each session can be using different dynamic
11 -- flags. Dynamic flags can also be set at the prompt in GHCi.
13 -- * Dynamic flags and associated configuration types
25 HscTarget(..), isObjectTarget, defaultObjectTarget,
26 GhcMode(..), isOneShot,
27 GhcLink(..), isNoLink,
31 fFlags, fLangFlags, xFlags,
32 DPHBackend(..), dphPackageMaybe,
36 ghcUsagePath, ghciUsagePath, topDir, tmpDir, rawSettings,
37 extraGccViaCFlags, systemPackageConfig,
38 pgm_L, pgm_P, pgm_F, pgm_c, pgm_s, pgm_a, pgm_l, pgm_dll, pgm_T,
39 pgm_sysman, pgm_windres, pgm_lo, pgm_lc,
40 opt_L, opt_P, opt_F, opt_c, opt_m, opt_a, opt_l,
41 opt_windres, opt_lo, opt_lc,
44 -- ** Manipulating DynFlags
45 defaultDynFlags, -- Settings -> DynFlags
46 initDynFlags, -- DynFlags -> IO DynFlags
48 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
55 -- ** Parsing DynFlags
57 parseDynamicNoPackageFlags,
60 supportedLanguagesAndExtensions,
62 -- ** DynFlag C compiler options
65 -- * Configuration of the stg-to-stg passes
69 -- * Compiler configuration suitable for display to the user
72 -- Only in stage 2 can we be sure that the RTS
73 -- exposes the appropriate runtime boolean
78 #include "HsVersions.h"
83 import PrelNames ( mAIN )
85 import {-# SOURCE #-} Packages (PackageState)
86 import DriverPhases ( Phase(..), phaseInputExt )
89 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
92 import Maybes ( orElse )
97 import Foreign.C ( CInt )
99 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
102 import System.IO.Unsafe ( unsafePerformIO )
105 import Control.Monad ( when )
109 import Data.Map (Map)
110 import qualified Data.Map as Map
111 import Distribution.System
112 import System.FilePath
113 import System.IO ( stderr, hPutChar )
115 -- -----------------------------------------------------------------------------
118 -- | Enumerates the simple on-or-off dynamic flags
125 | Opt_D_dump_cmmz_pretty
129 | Opt_D_dump_asm_native
130 | Opt_D_dump_asm_liveness
131 | Opt_D_dump_asm_coalesce
132 | Opt_D_dump_asm_regalloc
133 | Opt_D_dump_asm_regalloc_stages
134 | Opt_D_dump_asm_conflicts
135 | Opt_D_dump_asm_stats
136 | Opt_D_dump_asm_expanded
138 | Opt_D_dump_core_stats
144 | Opt_D_dump_inlinings
145 | Opt_D_dump_rule_firings
146 | Opt_D_dump_rule_rewrites
147 | Opt_D_dump_occur_anal
151 | Opt_D_dump_simpl_iterations
152 | Opt_D_dump_simpl_phases
161 | Opt_D_dump_worker_wrapper
162 | Opt_D_dump_rn_trace
163 | Opt_D_dump_rn_stats
165 | Opt_D_dump_simpl_stats
166 | Opt_D_dump_cs_trace -- Constraint solver in type checker
167 | Opt_D_dump_tc_trace
168 | Opt_D_dump_if_trace
169 | Opt_D_dump_vt_trace
176 | Opt_D_verbose_core2core
177 | Opt_D_verbose_stg2stg
179 | Opt_D_dump_hi_diffs
180 | Opt_D_dump_minimal_imports
181 | Opt_D_dump_mod_cycles
182 | Opt_D_dump_view_pattern_commoning
183 | Opt_D_faststring_stats
184 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
185 | Opt_D_no_debug_output
191 | Opt_WarnIsError -- -Werror; makes warnings fatal
192 | Opt_WarnDuplicateExports
194 | Opt_WarnImplicitPrelude
195 | Opt_WarnIncompletePatterns
196 | Opt_WarnIncompleteUniPatterns
197 | Opt_WarnIncompletePatternsRecUpd
198 | Opt_WarnMissingFields
199 | Opt_WarnMissingImportList
200 | Opt_WarnMissingMethods
201 | Opt_WarnMissingSigs
202 | Opt_WarnMissingLocalSigs
203 | Opt_WarnNameShadowing
204 | Opt_WarnOverlappingPatterns
205 | Opt_WarnTypeDefaults
206 | Opt_WarnMonomorphism
207 | Opt_WarnUnusedBinds
208 | Opt_WarnUnusedImports
209 | Opt_WarnUnusedMatches
210 | Opt_WarnWarningsDeprecations
211 | Opt_WarnDeprecatedFlags
212 | Opt_WarnDodgyExports
213 | Opt_WarnDodgyImports
215 | Opt_WarnAutoOrphans
218 | Opt_WarnUnrecognisedPragmas
219 | Opt_WarnDodgyForeignImports
220 | Opt_WarnLazyUnliftedBindings
221 | Opt_WarnUnusedDoBind
222 | Opt_WarnWrongDoBind
223 | Opt_WarnAlternativeLayoutRuleTransitional
225 | Opt_PrintExplicitForalls
232 | Opt_StaticArgumentTransformation
236 | Opt_DoLambdaEtaExpansion
240 | Opt_UnboxStrictFields
241 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
243 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
245 | Opt_RegsGraph -- do graph coloring register allocation
246 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
249 | Opt_IgnoreInterfacePragmas
250 | Opt_OmitInterfacePragmas
251 | Opt_ExposeAllUnfoldings
254 | Opt_AutoSccsOnAllToplevs
255 | Opt_AutoSccsOnExportedToplevs
256 | Opt_AutoSccsOnIndividualCafs
262 | Opt_ExcessPrecision
263 | Opt_EagerBlackHoling
264 | Opt_ReadUserPackageConf
268 | Opt_HideAllPackages
269 | Opt_PrintBindResult
273 | Opt_BreakOnException
275 | Opt_PrintEvldWithShow
276 | Opt_PrintBindContents
279 | Opt_EmitExternalCore
281 | Opt_BuildingCabalPackage
289 | Opt_ConvertToZipCfgAndBack
290 | Opt_AutoLinkPackages
291 | Opt_ImplicitImportQualified
299 | Opt_KeepRawTokenStream
304 data Language = Haskell98 | Haskell2010
308 | Opt_OverlappingInstances
309 | Opt_UndecidableInstances
310 | Opt_IncoherentInstances
311 | Opt_MonomorphismRestriction
314 | Opt_RelaxedPolyRec -- Deprecated
315 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
316 | Opt_ForeignFunctionInterface
317 | Opt_UnliftedFFITypes
318 | Opt_GHCForeignImportPrim
319 | Opt_ParallelArrays -- Syntactic support for parallel arrays
320 | Opt_Arrows -- Arrow-notation syntax
321 | Opt_TemplateHaskell
324 | Opt_Generics -- "Derivable type classes"
325 | Opt_ImplicitPrelude
326 | Opt_ScopedTypeVariables
330 | Opt_OverloadedStrings
331 | Opt_DisambiguateRecordFields
332 | Opt_RecordWildCards
338 | Opt_DoAndIfThenElse
339 | Opt_RebindableSyntax
341 | Opt_StandaloneDeriving
342 | Opt_DeriveDataTypeable
344 | Opt_DeriveTraversable
347 | Opt_TypeSynonymInstances
348 | Opt_FlexibleContexts
349 | Opt_FlexibleInstances
350 | Opt_ConstrainedClassMethods
351 | Opt_MultiParamTypeClasses
352 | Opt_FunctionalDependencies
354 | Opt_PolymorphicComponents
355 | Opt_ExistentialQuantification
359 | Opt_ParallelListComp
360 | Opt_TransformListComp
361 | Opt_GeneralizedNewtypeDeriving
364 | Opt_PostfixOperators
367 | Opt_LiberalTypeSynonyms
370 | Opt_ImpredicativeTypes
374 | Opt_AlternativeLayoutRule
375 | Opt_AlternativeLayoutRuleTransitional
376 | Opt_DatatypeContexts
377 | Opt_NondecreasingIndentation
381 -- | Contains not only a collection of 'DynFlag's but also a plethora of
382 -- information relating to the compilation of a single file or GHC session
383 data DynFlags = DynFlags {
386 hscTarget :: HscTarget,
387 hscOutName :: String, -- ^ Name of the output file
388 extCoreName :: String, -- ^ Name of the .hcr output file
389 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
390 optLevel :: Int, -- ^ Optimisation level
391 simplPhases :: Int, -- ^ Number of simplifier phases
392 maxSimplIterations :: Int, -- ^ Max simplifier iterations
393 shouldDumpSimplPhase :: Maybe String,
394 ruleCheck :: Maybe String,
395 strictnessBefore :: [Int], -- ^ Additional demand analysis
397 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
398 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
399 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
400 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
401 -- See CoreMonad.FloatOutSwitches
403 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
404 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
405 importPaths :: [FilePath],
407 mainFunIs :: Maybe String,
408 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
410 dphBackend :: DPHBackend,
412 thisPackage :: PackageId, -- ^ name of package currently being compiled
415 ways :: [Way], -- ^ Way flags from the command line
416 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
417 rtsBuildTag :: String, -- ^ The RTS \"way\"
419 -- For object splitting
420 splitInfo :: Maybe (String,Int),
423 objectDir :: Maybe String,
424 dylibInstallName :: Maybe String,
425 hiDir :: Maybe String,
426 stubDir :: Maybe String,
432 outputFile :: Maybe String,
433 outputHi :: Maybe String,
434 dynLibLoader :: DynLibLoader,
436 -- | This is set by 'DriverPipeline.runPipeline' based on where
437 -- its output is going.
438 dumpPrefix :: Maybe FilePath,
440 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
441 -- Set by @-ddump-file-prefix@
442 dumpPrefixForce :: Maybe FilePath,
444 includePaths :: [String],
445 libraryPaths :: [String],
446 frameworkPaths :: [String], -- used on darwin only
447 cmdlineFrameworks :: [String], -- ditto
449 rtsOpts :: Maybe String,
450 rtsOptsEnabled :: RtsOptsEnabled,
452 hpcDir :: String, -- ^ Path to store the .mix files
454 settings :: Settings,
457 depMakefile :: FilePath,
458 depIncludePkgDeps :: Bool,
459 depExcludeMods :: [ModuleName],
460 depSuffixes :: [String],
463 extraPkgConfs :: [FilePath],
464 -- ^ The @-package-conf@ flags given on the command line, in the order
467 packageFlags :: [PackageFlag],
468 -- ^ The @-package@ and @-hide-package@ flags from the command-line
471 -- NB. do not modify this field, it is calculated by
472 -- Packages.initPackages and Packages.updatePackages.
473 pkgDatabase :: Maybe [PackageConfig],
474 pkgState :: PackageState,
477 -- These have to be IORefs, because the defaultCleanupHandler needs to
478 -- know what to clean when an exception happens
479 filesToClean :: IORef [FilePath],
480 dirsToClean :: IORef (Map FilePath FilePath),
484 -- Don't change this without updating extensionFlags:
485 language :: Maybe Language,
486 -- Don't change this without updating extensionFlags:
487 extensions :: [OnOff ExtensionFlag],
488 -- extensionFlags should always be equal to
489 -- flattenExtensionFlags language extensions
490 extensionFlags :: [ExtensionFlag],
492 -- | Message output action: use "ErrUtils" instead of this if you can
493 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
495 haddockOptions :: Maybe String
498 data Settings = Settings {
499 sGhcUsagePath :: FilePath, -- Filled in by SysTools
500 sGhciUsagePath :: FilePath, -- ditto
502 sTmpDir :: String, -- no trailing '/'
503 -- You shouldn't need to look things up in rawSettings directly.
504 -- They should have their own fields instead.
505 sRawSettings :: [(String, String)],
506 sExtraGccViaCFlags :: [String],
507 sSystemPackageConfig :: FilePath,
508 -- commands for particular phases
510 sPgm_P :: (String,[Option]),
512 sPgm_c :: (String,[Option]),
513 sPgm_s :: (String,[Option]),
514 sPgm_a :: (String,[Option]),
515 sPgm_l :: (String,[Option]),
516 sPgm_dll :: (String,[Option]),
518 sPgm_sysman :: String,
519 sPgm_windres :: String,
520 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
521 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
522 -- options for particular phases
530 sOpt_windres :: [String],
531 sOpt_lo :: [String], -- LLVM: llvm optimiser
532 sOpt_lc :: [String] -- LLVM: llc static compiler
536 ghcUsagePath :: DynFlags -> FilePath
537 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
538 ghciUsagePath :: DynFlags -> FilePath
539 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
540 topDir :: DynFlags -> FilePath
541 topDir dflags = sTopDir (settings dflags)
542 tmpDir :: DynFlags -> String
543 tmpDir dflags = sTmpDir (settings dflags)
544 rawSettings :: DynFlags -> [(String, String)]
545 rawSettings dflags = sRawSettings (settings dflags)
546 extraGccViaCFlags :: DynFlags -> [String]
547 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
548 systemPackageConfig :: DynFlags -> FilePath
549 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
550 pgm_L :: DynFlags -> String
551 pgm_L dflags = sPgm_L (settings dflags)
552 pgm_P :: DynFlags -> (String,[Option])
553 pgm_P dflags = sPgm_P (settings dflags)
554 pgm_F :: DynFlags -> String
555 pgm_F dflags = sPgm_F (settings dflags)
556 pgm_c :: DynFlags -> (String,[Option])
557 pgm_c dflags = sPgm_c (settings dflags)
558 pgm_s :: DynFlags -> (String,[Option])
559 pgm_s dflags = sPgm_s (settings dflags)
560 pgm_a :: DynFlags -> (String,[Option])
561 pgm_a dflags = sPgm_a (settings dflags)
562 pgm_l :: DynFlags -> (String,[Option])
563 pgm_l dflags = sPgm_l (settings dflags)
564 pgm_dll :: DynFlags -> (String,[Option])
565 pgm_dll dflags = sPgm_dll (settings dflags)
566 pgm_T :: DynFlags -> String
567 pgm_T dflags = sPgm_T (settings dflags)
568 pgm_sysman :: DynFlags -> String
569 pgm_sysman dflags = sPgm_sysman (settings dflags)
570 pgm_windres :: DynFlags -> String
571 pgm_windres dflags = sPgm_windres (settings dflags)
572 pgm_lo :: DynFlags -> (String,[Option])
573 pgm_lo dflags = sPgm_lo (settings dflags)
574 pgm_lc :: DynFlags -> (String,[Option])
575 pgm_lc dflags = sPgm_lc (settings dflags)
576 opt_L :: DynFlags -> [String]
577 opt_L dflags = sOpt_L (settings dflags)
578 opt_P :: DynFlags -> [String]
579 opt_P dflags = sOpt_P (settings dflags)
580 opt_F :: DynFlags -> [String]
581 opt_F dflags = sOpt_F (settings dflags)
582 opt_c :: DynFlags -> [String]
583 opt_c dflags = sOpt_c (settings dflags)
584 opt_m :: DynFlags -> [String]
585 opt_m dflags = sOpt_m (settings dflags)
586 opt_a :: DynFlags -> [String]
587 opt_a dflags = sOpt_a (settings dflags)
588 opt_l :: DynFlags -> [String]
589 opt_l dflags = sOpt_l (settings dflags)
590 opt_windres :: DynFlags -> [String]
591 opt_windres dflags = sOpt_windres (settings dflags)
592 opt_lo :: DynFlags -> [String]
593 opt_lo dflags = sOpt_lo (settings dflags)
594 opt_lc :: DynFlags -> [String]
595 opt_lc dflags = sOpt_lc (settings dflags)
597 wayNames :: DynFlags -> [WayName]
598 wayNames = map wayName . ways
600 -- | The target code type of the compilation (if any).
602 -- Whenever you change the target, also make sure to set 'ghcLink' to
603 -- something sensible.
605 -- 'HscNothing' can be used to avoid generating any output, however, note
608 -- * This will not run the desugaring step, thus no warnings generated in
609 -- this step will be output. In particular, this includes warnings related
610 -- to pattern matching. You can run the desugarer manually using
611 -- 'GHC.desugarModule'.
613 -- * If a program uses Template Haskell the typechecker may try to run code
614 -- from an imported module. This will fail if no code has been generated
615 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
616 -- whether this might be the case and choose to either switch to a
617 -- different target or avoid typechecking such modules. (The latter may
618 -- preferable for security reasons.)
621 = HscC -- ^ Generate C code.
622 | HscAsm -- ^ Generate assembly using the native code generator.
623 | HscLlvm -- ^ Generate assembly using the llvm code generator.
624 | HscJava -- ^ Generate Java bytecode.
625 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
626 | HscNothing -- ^ Don't generate any code. See notes above.
629 showHscTargetFlag :: HscTarget -> String
630 showHscTargetFlag HscC = "-fvia-c"
631 showHscTargetFlag HscAsm = "-fasm"
632 showHscTargetFlag HscLlvm = "-fllvm"
633 showHscTargetFlag HscJava = panic "No flag for HscJava"
634 showHscTargetFlag HscInterpreted = "-fbyte-code"
635 showHscTargetFlag HscNothing = "-fno-code"
637 -- | Will this target result in an object file on the disk?
638 isObjectTarget :: HscTarget -> Bool
639 isObjectTarget HscC = True
640 isObjectTarget HscAsm = True
641 isObjectTarget HscLlvm = True
642 isObjectTarget _ = False
644 -- | The 'GhcMode' tells us whether we're doing multi-module
645 -- compilation (controlled via the "GHC" API) or one-shot
646 -- (single-module) compilation. This makes a difference primarily to
647 -- the "Finder": in one-shot mode we look for interface files for
648 -- imported modules, but in multi-module mode we look for source files
649 -- in order to check whether they need to be recompiled.
651 = CompManager -- ^ @\-\-make@, GHCi, etc.
652 | OneShot -- ^ @ghc -c Foo.hs@
653 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
656 instance Outputable GhcMode where
657 ppr CompManager = ptext (sLit "CompManager")
658 ppr OneShot = ptext (sLit "OneShot")
659 ppr MkDepend = ptext (sLit "MkDepend")
661 isOneShot :: GhcMode -> Bool
662 isOneShot OneShot = True
663 isOneShot _other = False
665 -- | What to do in the link step, if there is one.
667 = NoLink -- ^ Don't link at all
668 | LinkBinary -- ^ Link object code into a binary
669 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
670 -- bytecode and object code).
671 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
674 isNoLink :: GhcLink -> Bool
675 isNoLink NoLink = True
678 -- Is it worth evaluating this Bool and caching it in the DynFlags value
679 -- during initDynFlags?
680 doingTickyProfiling :: DynFlags -> Bool
681 doingTickyProfiling _ = opt_Ticky
682 -- XXX -ticky is a static flag, because it implies -debug which is also
683 -- static. If the way flags were made dynamic, we could fix this.
686 = ExposePackage String
687 | ExposePackageId String
689 | IgnorePackage String
692 defaultHscTarget :: HscTarget
693 defaultHscTarget = defaultObjectTarget
695 -- | The 'HscTarget' value corresponding to the default way to create
696 -- object files on the current platform.
697 defaultObjectTarget :: HscTarget
699 | cGhcUnregisterised == "YES" = HscC
700 | cGhcWithNativeCodeGen == "YES" = HscAsm
701 | otherwise = HscLlvm
708 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
711 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
712 initDynFlags :: DynFlags -> IO DynFlags
713 initDynFlags dflags = do
714 -- someday these will be dynamic flags
715 ways <- readIORef v_Ways
716 refFilesToClean <- newIORef []
717 refDirsToClean <- newIORef Map.empty
720 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
721 rtsBuildTag = mkBuildTag ways,
722 filesToClean = refFilesToClean,
723 dirsToClean = refDirsToClean
726 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
727 -- and must be fully initialized by 'GHC.newSession' first.
728 defaultDynFlags :: Settings -> DynFlags
729 defaultDynFlags mySettings =
731 ghcMode = CompManager,
732 ghcLink = LinkBinary,
733 hscTarget = defaultHscTarget,
739 maxSimplIterations = 4,
740 shouldDumpSimplPhase = Nothing,
742 specConstrThreshold = Just 200,
743 specConstrCount = Just 3,
744 liberateCaseThreshold = Just 200,
745 floatLamArgs = Just 0, -- Default: float only if no fvs
746 strictnessBefore = [],
748 targetPlatform = defaultTargetPlatform,
749 cmdlineHcIncludes = [],
753 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
755 dphBackend = DPHNone,
757 thisPackage = mainPackageId,
760 dylibInstallName = Nothing,
764 objectSuf = phaseInputExt StopLn,
765 hcSuf = phaseInputExt HCc,
768 outputFile = Nothing,
770 dynLibLoader = SystemDependent,
771 dumpPrefix = Nothing,
772 dumpPrefixForce = Nothing,
776 cmdlineFrameworks = [],
778 rtsOptsEnabled = RtsOptsSafeOnly,
784 pkgDatabase = Nothing,
785 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
786 ways = panic "defaultDynFlags: No ways",
787 buildTag = panic "defaultDynFlags: No buildTag",
788 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
790 settings = mySettings,
792 depMakefile = "Makefile",
793 depIncludePkgDeps = False,
796 -- end of ghc -M values
797 filesToClean = panic "defaultDynFlags: No filesToClean",
798 dirsToClean = panic "defaultDynFlags: No dirsToClean",
799 haddockOptions = Nothing,
800 flags = defaultFlags,
803 extensionFlags = flattenExtensionFlags Nothing [],
805 log_action = \severity srcSpan style msg ->
807 SevOutput -> printOutput (msg style)
808 SevInfo -> printErrs (msg style)
809 SevFatal -> printErrs (msg style)
812 printErrs ((mkLocMessage srcSpan msg) style)
813 -- careful (#2302): printErrs prints in UTF-8, whereas
814 -- converting to string first and using hPutStr would
815 -- just emit the low 8 bits of each unicode char.
819 Note [Verbosity levels]
820 ~~~~~~~~~~~~~~~~~~~~~~~
821 0 | print errors & warnings only
822 1 | minimal verbosity: print "compiling M ... done." for each module.
823 2 | equivalent to -dshow-passes
824 3 | equivalent to existing "ghc -v"
825 4 | "ghc -v -ddump-most"
826 5 | "ghc -v -ddump-all"
832 -- OnOffs accumulate in reverse order, so we use foldr in order to
833 -- process them in the right order
834 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
836 flattenExtensionFlags ml = foldr f defaultExtensionFlags
837 where f (On f) flags = f : delete f flags
838 f (Off f) flags = delete f flags
839 defaultExtensionFlags = languageExtensions ml
841 languageExtensions :: Maybe Language -> [ExtensionFlag]
843 languageExtensions Nothing
844 -- Nothing => the default case
845 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
846 -- behaviour the default, to see if anyone notices
848 -- In due course I'd like Opt_MonoLocalBinds to be on by default
849 -- But NB it's implied by GADTs etc
850 -- SLPJ September 2010
851 : Opt_NondecreasingIndentation -- This has been on by default for some time
852 : languageExtensions (Just Haskell2010)
854 languageExtensions (Just Haskell98)
855 = [Opt_ImplicitPrelude,
856 Opt_MonomorphismRestriction,
858 Opt_DatatypeContexts,
859 Opt_NondecreasingIndentation
860 -- strictly speaking non-standard, but we always had this
861 -- on implicitly before the option was added in 7.1, and
862 -- turning it off breaks code, so we're keeping it on for
863 -- backwards compatibility. Cabal uses -XHaskell98 by
864 -- default unless you specify another language.
867 languageExtensions (Just Haskell2010)
868 = [Opt_ImplicitPrelude,
869 Opt_MonomorphismRestriction,
870 Opt_DatatypeContexts,
872 Opt_ForeignFunctionInterface,
877 -- | Test whether a 'DynFlag' is set
878 dopt :: DynFlag -> DynFlags -> Bool
879 dopt f dflags = f `elem` (flags dflags)
882 dopt_set :: DynFlags -> DynFlag -> DynFlags
883 dopt_set dfs f = dfs{ flags = f : flags dfs }
885 -- | Unset a 'DynFlag'
886 dopt_unset :: DynFlags -> DynFlag -> DynFlags
887 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
889 -- | Test whether a 'ExtensionFlag' is set
890 xopt :: ExtensionFlag -> DynFlags -> Bool
891 xopt f dflags = f `elem` extensionFlags dflags
893 -- | Set a 'ExtensionFlag'
894 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
896 = let onoffs = On f : extensions dfs
897 in dfs { extensions = onoffs,
898 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
900 -- | Unset a 'ExtensionFlag'
901 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
903 = let onoffs = Off f : extensions dfs
904 in dfs { extensions = onoffs,
905 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
907 setLanguage :: Language -> DynP ()
908 setLanguage l = upd f
909 where f dfs = let mLang = Just l
910 oneoffs = extensions dfs
913 extensionFlags = flattenExtensionFlags mLang oneoffs
916 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
917 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
918 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
919 -> [a] -- ^ Correctly ordered extracted options
920 getOpts dflags opts = reverse (opts dflags)
921 -- We add to the options from the front, so we need to reverse the list
923 -- | Gets the verbosity flag for the current verbosity level. This is fed to
924 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
925 getVerbFlags :: DynFlags -> [String]
927 | verbosity dflags >= 4 = ["-v"]
930 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
931 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
932 setPgmP, addOptl, addOptP,
933 addCmdlineFramework, addHaddockOpts
934 :: String -> DynFlags -> DynFlags
935 setOutputFile, setOutputHi, setDumpPrefixForce
936 :: Maybe String -> DynFlags -> DynFlags
938 setObjectDir f d = d{ objectDir = Just f}
939 setHiDir f d = d{ hiDir = Just f}
940 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
941 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
942 -- \#included from the .hc file when compiling via C (i.e. unregisterised
944 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
945 setDylibInstallName f d = d{ dylibInstallName = Just f}
947 setObjectSuf f d = d{ objectSuf = f}
948 setHiSuf f d = d{ hiSuf = f}
949 setHcSuf f d = d{ hcSuf = f}
951 setOutputFile f d = d{ outputFile = f}
952 setOutputHi f d = d{ outputHi = f}
954 parseDynLibLoaderMode f d =
956 ("deploy", "") -> d{ dynLibLoader = Deployable }
957 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
958 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
960 setDumpPrefixForce f d = d { dumpPrefixForce = f}
962 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
963 -- Config.hs should really use Option.
964 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
965 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
966 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
969 setDepMakefile :: FilePath -> DynFlags -> DynFlags
970 setDepMakefile f d = d { depMakefile = deOptDep f }
972 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
973 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
975 addDepExcludeMod :: String -> DynFlags -> DynFlags
977 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
979 addDepSuffix :: FilePath -> DynFlags -> DynFlags
980 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
983 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
984 -- we need to strip the "-optdep" off of the arg
985 deOptDep :: String -> String
986 deOptDep x = case stripPrefix "-optdep" x of
990 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
992 addHaddockOpts f d = d{ haddockOptions = Just f}
994 -- -----------------------------------------------------------------------------
995 -- Command-line options
997 -- | When invoking external tools as part of the compilation pipeline, we
998 -- pass these a sequence of options on the command-line. Rather than
999 -- just using a list of Strings, we use a type that allows us to distinguish
1000 -- between filepaths and 'other stuff'. The reason for this is that
1001 -- this type gives us a handle on transforming filenames, and filenames only,
1002 -- to whatever format they're expected to be on a particular platform.
1004 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1005 String -- a non-filepath prefix that shouldn't be
1006 -- transformed (e.g., "/out=")
1007 String -- the filepath/filename portion
1010 showOpt :: Option -> String
1011 showOpt (FileOption pre f) = pre ++ f
1012 showOpt (Option s) = s
1014 -----------------------------------------------------------------------------
1015 -- Setting the optimisation level
1017 updOptLevel :: Int -> DynFlags -> DynFlags
1018 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1020 = dfs2{ optLevel = final_n }
1022 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1023 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1024 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1026 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1027 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1029 -- -----------------------------------------------------------------------------
1030 -- StgToDo: abstraction of stg-to-stg passes to run.
1033 = StgDoMassageForProfiling -- should be (next to) last
1034 -- There's also setStgVarInfo, but its absolute "lastness"
1035 -- is so critical that it is hardwired in (no flag).
1038 getStgToDo :: DynFlags -> [StgToDo]
1042 stg_stats = dopt Opt_StgStats dflags
1044 todo1 = if stg_stats then [D_stg_stats] else []
1046 todo2 | WayProf `elem` wayNames dflags
1047 = StgDoMassageForProfiling : todo1
1051 {- **********************************************************************
1055 %********************************************************************* -}
1057 -- -----------------------------------------------------------------------------
1058 -- Parsing the dynamic flags.
1060 -- | Parse dynamic flags from a list of command line arguments. Returns the
1061 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1062 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1063 -- flags or missing arguments).
1064 parseDynamicFlags :: Monad m =>
1065 DynFlags -> [Located String]
1066 -> m (DynFlags, [Located String], [Located String])
1067 -- ^ Updated 'DynFlags', left-over arguments, and
1068 -- list of warnings.
1069 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1071 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1072 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1073 parseDynamicNoPackageFlags :: Monad m =>
1074 DynFlags -> [Located String]
1075 -> m (DynFlags, [Located String], [Located String])
1076 -- ^ Updated 'DynFlags', left-over arguments, and
1077 -- list of warnings.
1078 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1080 parseDynamicFlags_ :: Monad m =>
1081 DynFlags -> [Located String] -> Bool
1082 -> m (DynFlags, [Located String], [Located String])
1083 parseDynamicFlags_ dflags0 args pkg_flags = do
1084 -- XXX Legacy support code
1085 -- We used to accept things like
1086 -- optdep-f -optdepdepend
1087 -- optdep-f -optdep depend
1088 -- optdep -f -optdepdepend
1089 -- optdep -f -optdep depend
1090 -- but the spaces trip up proper argument handling. So get rid of them.
1091 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1092 f (x : xs) = x : f xs
1096 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1097 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1098 | otherwise = dynamic_flags
1100 let ((leftover, errs, warns), dflags1)
1101 = runCmdLine (processArgs flag_spec args') dflags0
1102 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1104 let (pic_warns, dflags2)
1105 | not (cTargetArch == X86_64 && cTargetOS == Linux) &&
1106 (not opt_Static || opt_PIC) &&
1107 hscTarget dflags1 == HscLlvm
1108 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1109 ++ "dynamic on this platform;\n"
1110 ++ " using " ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
1111 dflags1{ hscTarget = defaultObjectTarget })
1112 | otherwise = ([], dflags1)
1114 return (dflags2, leftover, pic_warns ++ warns)
1117 {- **********************************************************************
1119 DynFlags specifications
1121 %********************************************************************* -}
1123 allFlags :: [String]
1124 allFlags = map ('-':) $
1125 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1126 map ("fno-"++) flags ++
1127 map ("f"++) flags ++
1128 map ("f"++) flags' ++
1129 map ("X"++) supportedExtensions
1130 where ok (PrefixPred _ _) = False
1132 flags = [ name | (name, _, _) <- fFlags ]
1133 flags' = [ name | (name, _, _) <- fLangFlags ]
1135 --------------- The main flags themselves ------------------
1136 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1138 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1139 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1140 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1142 (HasArg (\s -> do { addCmdlineHCInclude s
1143 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1144 , Flag "v" (OptIntSuffix setVerbosity)
1146 ------- Specific phases --------------------------------------------
1147 -- need to appear before -pgmL to be parsed as LLVM flags.
1148 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1149 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1150 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1151 , Flag "pgmP" (hasArg setPgmP)
1152 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1153 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1154 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1155 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1156 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1157 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1158 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1159 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1161 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1162 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1163 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1164 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1165 , Flag "optP" (hasArg addOptP)
1166 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1167 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1168 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1169 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1170 , Flag "optl" (hasArg addOptl)
1171 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1174 (NoArg (if can_split
1175 then setDynFlag Opt_SplitObjs
1176 else addWarn "ignoring -fsplit-objs"))
1178 -------- ghc -M -----------------------------------------------------
1179 , Flag "dep-suffix" (hasArg addDepSuffix)
1180 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1181 , Flag "dep-makefile" (hasArg setDepMakefile)
1182 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1183 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1184 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1185 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1186 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1187 , Flag "exclude-module" (hasArg addDepExcludeMod)
1188 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1189 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1191 -------- Linking ----------------------------------------------------
1192 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1193 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1194 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1195 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1197 ------- Libraries ---------------------------------------------------
1198 , Flag "L" (Prefix addLibraryPath)
1199 , Flag "l" (AnySuffix (upd . addOptl))
1201 ------- Frameworks --------------------------------------------------
1202 -- -framework-path should really be -F ...
1203 , Flag "framework-path" (HasArg addFrameworkPath)
1204 , Flag "framework" (hasArg addCmdlineFramework)
1206 ------- Output Redirection ------------------------------------------
1207 , Flag "odir" (hasArg setObjectDir)
1208 , Flag "o" (SepArg (upd . setOutputFile . Just))
1209 , Flag "ohi" (hasArg (setOutputHi . Just ))
1210 , Flag "osuf" (hasArg setObjectSuf)
1211 , Flag "hcsuf" (hasArg setHcSuf)
1212 , Flag "hisuf" (hasArg setHiSuf)
1213 , Flag "hidir" (hasArg setHiDir)
1214 , Flag "tmpdir" (hasArg setTmpDir)
1215 , Flag "stubdir" (hasArg setStubDir)
1216 , Flag "outputdir" (hasArg setOutputDir)
1217 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1219 ------- Keeping temporary files -------------------------------------
1220 -- These can be singular (think ghc -c) or plural (think ghc --make)
1221 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1222 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1223 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1224 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1225 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1226 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1227 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1228 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1229 -- This only makes sense as plural
1230 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1232 ------- Miscellaneous ----------------------------------------------
1233 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1234 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1235 , Flag "with-rtsopts" (HasArg setRtsOpts)
1236 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1237 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1238 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1239 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1240 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1241 , Flag "main-is" (SepArg setMainIs)
1242 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1243 , Flag "haddock-opts" (hasArg addHaddockOpts)
1244 , Flag "hpcdir" (SepArg setOptHpcDir)
1246 ------- recompilation checker --------------------------------------
1247 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1248 ; deprecate "Use -fno-force-recomp instead" }))
1249 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1250 ; deprecate "Use -fforce-recomp instead" }))
1252 ------ HsCpp opts ---------------------------------------------------
1253 , Flag "D" (AnySuffix (upd . addOptP))
1254 , Flag "U" (AnySuffix (upd . addOptP))
1256 ------- Include/Import Paths ----------------------------------------
1257 , Flag "I" (Prefix addIncludePath)
1258 , Flag "i" (OptPrefix addImportPath)
1260 ------ Debugging ----------------------------------------------------
1261 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1263 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1264 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1265 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1266 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1267 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1268 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1269 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1270 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1271 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1272 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1273 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1274 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1275 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1276 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1277 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1278 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1279 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1280 ; setDumpFlag' Opt_D_dump_llvm}))
1281 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1282 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1283 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1284 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1285 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1286 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1287 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1288 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1289 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1290 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1291 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1292 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1293 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1294 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1295 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1296 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1297 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1298 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1299 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1300 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1301 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1302 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1303 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1304 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1305 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1306 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1307 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1308 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1309 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1310 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1311 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1312 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1313 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1314 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1315 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1316 ; setVerboseCore2Core }))
1317 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1318 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1319 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1320 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1321 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1322 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1323 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1324 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1325 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1326 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1327 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1328 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1329 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1330 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1331 , Flag "dshow-passes" (NoArg (do forceRecompile
1332 setVerbosity (Just 2)))
1333 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1335 ------ Machine dependant (-m<blah>) stuff ---------------------------
1337 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1338 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1339 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1340 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1342 ------ Warning opts -------------------------------------------------
1343 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1344 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1345 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1346 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1347 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1348 ; deprecate "Use -w instead" }))
1349 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1351 ------ Optimisation flags ------------------------------------------
1352 , Flag "O" (noArgM (setOptLevel 1))
1353 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1354 setOptLevel 0 dflags))
1355 , Flag "Odph" (noArgM setDPHOpt)
1356 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1357 -- If the number is missing, use 1
1359 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1360 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1361 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1362 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1363 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1364 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1365 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1366 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1367 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1368 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1369 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1370 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1371 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1373 ------ Profiling ----------------------------------------------------
1375 -- XXX Should the -f* flags be deprecated?
1376 -- They don't seem to be documented
1377 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1378 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1379 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1380 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1381 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1382 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1383 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1384 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1385 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1387 ------ DPH flags ----------------------------------------------------
1389 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1390 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1391 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1392 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1394 ------ Compiler flags -----------------------------------------------
1396 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1397 , Flag "fvia-c" (NoArg
1398 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1399 , Flag "fvia-C" (NoArg
1400 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1401 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1403 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1404 setTarget HscNothing))
1405 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1406 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1407 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1408 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1410 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1411 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1412 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1413 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1414 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1415 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1416 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1418 package_flags :: [Flag (CmdLineP DynFlags)]
1420 ------- Packages ----------------------------------------------------
1421 Flag "package-conf" (HasArg extraPkgConf_)
1422 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1423 , Flag "package-name" (hasArg setPackageName)
1424 , Flag "package-id" (HasArg exposePackageId)
1425 , Flag "package" (HasArg exposePackage)
1426 , Flag "hide-package" (HasArg hidePackage)
1427 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1428 , Flag "ignore-package" (HasArg ignorePackage)
1429 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1430 ; deprecate "Use -package instead" }))
1433 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1434 -- False <=> we are turning the flag off
1435 turnOn :: TurnOnFlag; turnOn = True
1436 turnOff :: TurnOnFlag; turnOff = False
1439 = ( String -- Flag in string form
1440 , flag -- Flag in internal form
1441 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1442 -- Typically, emit a warning or error
1444 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1445 -> String -- ^ The flag prefix
1446 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1447 -> FlagSpec flag -- ^ Specification of this particular flag
1448 -> Flag (CmdLineP DynFlags)
1449 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1450 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1452 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1453 deprecatedForExtension lang turn_on
1454 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1456 flag | turn_on = lang
1457 | otherwise = "No"++lang
1459 useInstead :: String -> TurnOnFlag -> DynP ()
1460 useInstead flag turn_on
1461 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1463 no = if turn_on then "" else "no-"
1465 nop :: TurnOnFlag -> DynP ()
1468 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1469 fFlags :: [FlagSpec DynFlag]
1471 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1472 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1473 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1474 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1475 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1476 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1477 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1478 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1479 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1480 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1481 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1482 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1483 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1484 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1485 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1486 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1487 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1488 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1489 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1490 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1491 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1492 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1493 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1494 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1495 ( "warn-orphans", Opt_WarnOrphans, nop ),
1496 ( "warn-identities", Opt_WarnIdentities, nop ),
1497 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1498 ( "warn-tabs", Opt_WarnTabs, nop ),
1499 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1500 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1501 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1502 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1503 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1504 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1505 ( "strictness", Opt_Strictness, nop ),
1506 ( "specialise", Opt_Specialise, nop ),
1507 ( "float-in", Opt_FloatIn, nop ),
1508 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1509 ( "full-laziness", Opt_FullLaziness, nop ),
1510 ( "liberate-case", Opt_LiberateCase, nop ),
1511 ( "spec-constr", Opt_SpecConstr, nop ),
1512 ( "cse", Opt_CSE, nop ),
1513 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1514 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1515 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1516 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1517 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1518 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1519 ( "case-merge", Opt_CaseMerge, nop ),
1520 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1521 ( "method-sharing", Opt_MethodSharing,
1522 \_ -> deprecate "doesn't do anything any more"),
1523 -- Remove altogether in GHC 7.2
1524 ( "dicts-cheap", Opt_DictsCheap, nop ),
1525 ( "excess-precision", Opt_ExcessPrecision, nop ),
1526 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1527 ( "print-bind-result", Opt_PrintBindResult, nop ),
1528 ( "force-recomp", Opt_ForceRecomp, nop ),
1529 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1530 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1531 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1532 ( "break-on-exception", Opt_BreakOnException, nop ),
1533 ( "break-on-error", Opt_BreakOnError, nop ),
1534 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1535 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1536 ( "run-cps", Opt_RunCPS, nop ),
1537 ( "run-cpsz", Opt_RunCPSZ, nop ),
1538 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1539 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1540 ( "vectorise", Opt_Vectorise, nop ),
1541 ( "regs-graph", Opt_RegsGraph, nop ),
1542 ( "regs-iterative", Opt_RegsIterative, nop ),
1543 ( "gen-manifest", Opt_GenManifest, nop ),
1544 ( "embed-manifest", Opt_EmbedManifest, nop ),
1545 ( "ext-core", Opt_EmitExternalCore, nop ),
1546 ( "shared-implib", Opt_SharedImplib, nop ),
1547 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1548 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1549 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1550 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1553 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1554 fLangFlags :: [FlagSpec ExtensionFlag]
1556 ( "th", Opt_TemplateHaskell,
1557 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1558 ( "fi", Opt_ForeignFunctionInterface,
1559 deprecatedForExtension "ForeignFunctionInterface" ),
1560 ( "ffi", Opt_ForeignFunctionInterface,
1561 deprecatedForExtension "ForeignFunctionInterface" ),
1562 ( "arrows", Opt_Arrows,
1563 deprecatedForExtension "Arrows" ),
1564 ( "generics", Opt_Generics,
1565 deprecatedForExtension "Generics" ),
1566 ( "implicit-prelude", Opt_ImplicitPrelude,
1567 deprecatedForExtension "ImplicitPrelude" ),
1568 ( "bang-patterns", Opt_BangPatterns,
1569 deprecatedForExtension "BangPatterns" ),
1570 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1571 deprecatedForExtension "MonomorphismRestriction" ),
1572 ( "mono-pat-binds", Opt_MonoPatBinds,
1573 deprecatedForExtension "MonoPatBinds" ),
1574 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1575 deprecatedForExtension "ExtendedDefaultRules" ),
1576 ( "implicit-params", Opt_ImplicitParams,
1577 deprecatedForExtension "ImplicitParams" ),
1578 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1579 deprecatedForExtension "ScopedTypeVariables" ),
1580 ( "parr", Opt_ParallelArrays,
1581 deprecatedForExtension "ParallelArrays" ),
1582 ( "PArr", Opt_ParallelArrays,
1583 deprecatedForExtension "ParallelArrays" ),
1584 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1585 deprecatedForExtension "OverlappingInstances" ),
1586 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1587 deprecatedForExtension "UndecidableInstances" ),
1588 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1589 deprecatedForExtension "IncoherentInstances" )
1592 supportedLanguages :: [String]
1593 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1595 supportedExtensions :: [String]
1596 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1598 supportedLanguagesAndExtensions :: [String]
1599 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1601 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1602 languageFlags :: [FlagSpec Language]
1604 ( "Haskell98", Haskell98, nop ),
1605 ( "Haskell2010", Haskell2010, nop )
1608 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1609 xFlags :: [FlagSpec ExtensionFlag]
1611 ( "CPP", Opt_Cpp, nop ),
1612 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1613 ( "TupleSections", Opt_TupleSections, nop ),
1614 ( "PatternGuards", Opt_PatternGuards, nop ),
1615 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1616 ( "MagicHash", Opt_MagicHash, nop ),
1617 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1618 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1619 ( "KindSignatures", Opt_KindSignatures, nop ),
1620 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1621 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1622 ( "TransformListComp", Opt_TransformListComp, nop ),
1623 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1624 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1625 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1626 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1627 ( "Rank2Types", Opt_Rank2Types, nop ),
1628 ( "RankNTypes", Opt_RankNTypes, nop ),
1629 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1630 ( "TypeOperators", Opt_TypeOperators, nop ),
1631 ( "RecursiveDo", Opt_RecursiveDo,
1632 deprecatedForExtension "DoRec"),
1633 ( "DoRec", Opt_DoRec, nop ),
1634 ( "Arrows", Opt_Arrows, nop ),
1635 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1636 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1637 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1638 ( "Generics", Opt_Generics, nop ),
1639 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1640 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1641 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1642 ( "RecordPuns", Opt_RecordPuns,
1643 deprecatedForExtension "NamedFieldPuns" ),
1644 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1645 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1646 ( "GADTs", Opt_GADTs, nop ),
1647 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1648 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1649 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1650 ( "BangPatterns", Opt_BangPatterns, nop ),
1651 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1652 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1653 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1654 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1655 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1656 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1657 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1658 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1659 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1660 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1661 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1662 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1663 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1664 \ turn_on -> if not turn_on
1665 then deprecate "You can't turn off RelaxedPolyRec any more"
1667 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1668 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1669 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1671 ( "PatternSignatures", Opt_ScopedTypeVariables,
1672 deprecatedForExtension "ScopedTypeVariables" ),
1674 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1675 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1676 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1677 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1678 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1679 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1680 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1681 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1682 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1683 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1684 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1685 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1686 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1687 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1688 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1689 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1690 ( "PackageImports", Opt_PackageImports, nop )
1693 defaultFlags :: [DynFlag]
1695 = [ Opt_AutoLinkPackages,
1696 Opt_ReadUserPackageConf,
1700 #if GHC_DEFAULT_NEW_CODEGEN
1706 Opt_PrintBindContents,
1711 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1712 -- The default -O0 options
1716 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1718 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1719 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1720 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1721 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1722 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1723 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1724 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1725 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1727 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1729 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1730 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1731 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1733 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1734 -- all over the place
1736 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1738 -- Record wild-cards implies field disambiguation
1739 -- Otherwise if you write (C {..}) you may well get
1740 -- stuff like " 'a' not in scope ", which is a bit silly
1741 -- if the compiler has just filled in field 'a' of constructor 'C'
1742 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1744 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1747 optLevelFlags :: [([Int], DynFlag)]
1749 = [ ([0], Opt_IgnoreInterfacePragmas)
1750 , ([0], Opt_OmitInterfacePragmas)
1752 , ([1,2], Opt_IgnoreAsserts)
1753 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1755 , ([1,2], Opt_DoEtaReduction)
1756 , ([1,2], Opt_CaseMerge)
1757 , ([1,2], Opt_Strictness)
1759 , ([1,2], Opt_FullLaziness)
1760 , ([1,2], Opt_Specialise)
1761 , ([1,2], Opt_FloatIn)
1763 , ([2], Opt_LiberateCase)
1764 , ([2], Opt_SpecConstr)
1765 , ([2], Opt_RegsGraph)
1767 -- , ([2], Opt_StaticArgumentTransformation)
1768 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1769 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1770 -- several improvements to the heuristics, and I'm concerned that without
1771 -- those changes SAT will interfere with some attempts to write "high
1772 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1773 -- this year. In particular, the version in HEAD lacks the tail call
1774 -- criterion, so many things that look like reasonable loops will be
1775 -- turned into functions with extra (unneccesary) thunk creation.
1777 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1778 -- This one is important for a tiresome reason:
1779 -- we want to make sure that the bindings for data
1780 -- constructors are eta-expanded. This is probably
1781 -- a good thing anyway, but it seems fragile.
1784 -- -----------------------------------------------------------------------------
1785 -- Standard sets of warning options
1787 standardWarnings :: [DynFlag]
1789 = [ Opt_WarnWarningsDeprecations,
1790 Opt_WarnDeprecatedFlags,
1791 Opt_WarnUnrecognisedPragmas,
1792 Opt_WarnOverlappingPatterns,
1793 Opt_WarnMissingFields,
1794 Opt_WarnMissingMethods,
1795 Opt_WarnDuplicateExports,
1796 Opt_WarnLazyUnliftedBindings,
1797 Opt_WarnDodgyForeignImports,
1798 Opt_WarnWrongDoBind,
1799 Opt_WarnAlternativeLayoutRuleTransitional
1802 minusWOpts :: [DynFlag]
1803 -- Things you get with -W
1805 = standardWarnings ++
1806 [ Opt_WarnUnusedBinds,
1807 Opt_WarnUnusedMatches,
1808 Opt_WarnUnusedImports,
1809 Opt_WarnIncompletePatterns,
1810 Opt_WarnDodgyExports,
1811 Opt_WarnDodgyImports
1814 minusWallOpts :: [DynFlag]
1815 -- Things you get with -Wall
1818 [ Opt_WarnTypeDefaults,
1819 Opt_WarnNameShadowing,
1820 Opt_WarnMissingSigs,
1823 Opt_WarnUnusedDoBind
1826 minuswRemovesOpts :: [DynFlag]
1827 -- minuswRemovesOpts should be every warning option
1831 Opt_WarnIncompletePatternsRecUpd,
1832 Opt_WarnIncompleteUniPatterns,
1833 Opt_WarnMonomorphism,
1834 Opt_WarnUnrecognisedPragmas,
1835 Opt_WarnAutoOrphans,
1836 Opt_WarnImplicitPrelude
1839 enableGlasgowExts :: DynP ()
1840 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1841 mapM_ setExtensionFlag glasgowExtsFlags
1843 disableGlasgowExts :: DynP ()
1844 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1845 mapM_ unSetExtensionFlag glasgowExtsFlags
1847 glasgowExtsFlags :: [ExtensionFlag]
1848 glasgowExtsFlags = [
1849 Opt_ForeignFunctionInterface
1850 , Opt_UnliftedFFITypes
1851 , Opt_ImplicitParams
1852 , Opt_ScopedTypeVariables
1854 , Opt_TypeSynonymInstances
1855 , Opt_StandaloneDeriving
1856 , Opt_DeriveDataTypeable
1858 , Opt_DeriveFoldable
1859 , Opt_DeriveTraversable
1860 , Opt_FlexibleContexts
1861 , Opt_FlexibleInstances
1862 , Opt_ConstrainedClassMethods
1863 , Opt_MultiParamTypeClasses
1864 , Opt_FunctionalDependencies
1866 , Opt_PolymorphicComponents
1867 , Opt_ExistentialQuantification
1869 , Opt_PostfixOperators
1871 , Opt_LiberalTypeSynonyms
1875 , Opt_ParallelListComp
1876 , Opt_EmptyDataDecls
1877 , Opt_KindSignatures
1878 , Opt_GeneralizedNewtypeDeriving ]
1881 -- Consult the RTS to find whether GHC itself has been built profiled
1882 -- If so, you can't use Template Haskell
1883 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1885 rtsIsProfiled :: Bool
1886 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1889 checkTemplateHaskellOk :: Bool -> DynP ()
1891 checkTemplateHaskellOk turn_on
1892 | turn_on && rtsIsProfiled
1893 = addErr "You can't use Template Haskell with a profiled compiler"
1897 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1898 -- so we simply say "ok". It doesn't matter because TH isn't
1899 -- available in stage 1 anyway.
1900 checkTemplateHaskellOk _ = return ()
1903 {- **********************************************************************
1905 DynFlags constructors
1907 %********************************************************************* -}
1909 type DynP = EwM (CmdLineP DynFlags)
1911 upd :: (DynFlags -> DynFlags) -> DynP ()
1912 upd f = liftEwM (do dflags <- getCmdLineState
1913 putCmdLineState $! f dflags)
1915 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1916 updM f = do dflags <- liftEwM getCmdLineState
1918 liftEwM $ putCmdLineState $! dflags'
1920 --------------- Constructor functions for OptKind -----------------
1921 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1922 noArg fn = NoArg (upd fn)
1924 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1925 noArgM fn = NoArg (updM fn)
1927 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1928 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1930 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1931 hasArg fn = HasArg (upd . fn)
1933 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1934 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1935 ; deprecate deprec })
1937 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1938 intSuffix fn = IntSuffix (\n -> upd (fn n))
1940 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1941 -> OptKind (CmdLineP DynFlags)
1942 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1944 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1945 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1947 --------------------------
1948 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1949 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1950 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1952 --------------------------
1953 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1954 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1957 deps = [ if turn_on then setExtensionFlag d
1958 else unSetExtensionFlag d
1959 | (f', turn_on, d) <- impliedFlags, f' == f ]
1960 -- When you set f, set the ones it implies
1961 -- NB: use setExtensionFlag recursively, in case the implied flags
1962 -- implies further flags
1964 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1965 -- When you un-set f, however, we don't un-set the things it implies
1966 -- (except for -fno-glasgow-exts, which is treated specially)
1968 --------------------------
1969 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
1970 alterSettings f dflags = dflags { settings = f (settings dflags) }
1972 --------------------------
1973 setDumpFlag' :: DynFlag -> DynP ()
1974 setDumpFlag' dump_flag
1975 = do { setDynFlag dump_flag
1976 ; when want_recomp forceRecompile }
1978 -- Certain dumpy-things are really interested in what's going
1979 -- on during recompilation checking, so in those cases we
1980 -- don't want to turn it off.
1981 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1982 Opt_D_dump_hi_diffs]
1984 forceRecompile :: DynP ()
1985 -- Whenver we -ddump, force recompilation (by switching off the
1986 -- recompilation checker), else you don't see the dump! However,
1987 -- don't switch it off in --make mode, else *everything* gets
1988 -- recompiled which probably isn't what you want
1989 forceRecompile = do { dfs <- liftEwM getCmdLineState
1990 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1992 force_recomp dfs = isOneShot (ghcMode dfs)
1994 setVerboseCore2Core :: DynP ()
1995 setVerboseCore2Core = do forceRecompile
1996 setDynFlag Opt_D_verbose_core2core
1997 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2000 setDumpSimplPhases :: String -> DynP ()
2001 setDumpSimplPhases s = do forceRecompile
2002 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2004 spec = case s of { ('=' : s') -> s'; _ -> s }
2006 setVerbosity :: Maybe Int -> DynP ()
2007 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2009 addCmdlineHCInclude :: String -> DynP ()
2010 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2012 extraPkgConf_ :: FilePath -> DynP ()
2013 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2015 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2017 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2019 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2021 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2023 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2025 setPackageName :: String -> DynFlags -> DynFlags
2026 setPackageName p s = s{ thisPackage = stringToPackageId p }
2028 -- If we're linking a binary, then only targets that produce object
2029 -- code are allowed (requests for other target types are ignored).
2030 setTarget :: HscTarget -> DynP ()
2031 setTarget l = upd set
2034 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2037 -- Changes the target only if we're compiling object code. This is
2038 -- used by -fasm and -fllvm, which switch from one to the other, but
2039 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2040 -- can be safely used in an OPTIONS_GHC pragma.
2041 setObjTarget :: HscTarget -> DynP ()
2042 setObjTarget l = upd set
2045 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2048 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2049 setOptLevel n dflags
2050 | hscTarget dflags == HscInterpreted && n > 0
2051 = do addWarn "-O conflicts with --interactive; -O ignored."
2054 = return (updOptLevel n dflags)
2057 -- -Odph is equivalent to
2059 -- -O2 optimise as much as possible
2060 -- -fmax-simplifier-iterations20 this is necessary sometimes
2061 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2063 setDPHOpt :: DynFlags -> DynP DynFlags
2064 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2068 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2069 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2070 -- vectoriser cannot be used.
2072 data DPHBackend = DPHPar -- "dph-par"
2073 | DPHSeq -- "dph-seq"
2074 | DPHThis -- the currently compiled package
2075 | DPHNone -- no DPH library available
2076 deriving(Eq, Ord, Enum, Show)
2078 setDPHBackend :: DPHBackend -> DynP ()
2079 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2081 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2083 dphPackageMaybe :: DynFlags -> Maybe PackageId
2084 dphPackageMaybe dflags
2085 = case dphBackend dflags of
2086 DPHPar -> Just dphParPackageId
2087 DPHSeq -> Just dphSeqPackageId
2088 DPHThis -> Just (thisPackage dflags)
2091 setMainIs :: String -> DynP ()
2093 | not (null main_fn) && isLower (head main_fn)
2094 -- The arg looked like "Foo.Bar.baz"
2095 = upd $ \d -> d{ mainFunIs = Just main_fn,
2096 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2098 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2099 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2101 | otherwise -- The arg looked like "baz"
2102 = upd $ \d -> d{ mainFunIs = Just arg }
2104 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2106 -----------------------------------------------------------------------------
2107 -- Paths & Libraries
2109 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2111 -- -i on its own deletes the import paths
2112 addImportPath "" = upd (\s -> s{importPaths = []})
2113 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2117 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2120 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2122 addFrameworkPath p =
2123 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2125 #ifndef mingw32_TARGET_OS
2126 split_marker :: Char
2127 split_marker = ':' -- not configurable (ToDo)
2130 splitPathList :: String -> [String]
2131 splitPathList s = filter notNull (splitUp s)
2132 -- empty paths are ignored: there might be a trailing
2133 -- ':' in the initial list, for example. Empty paths can
2134 -- cause confusion when they are translated into -I options
2135 -- for passing to gcc.
2137 #ifndef mingw32_TARGET_OS
2138 splitUp xs = split split_marker xs
2140 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2142 -- That is, if "foo:bar:baz" is used, this interpreted as
2143 -- consisting of three entries, 'foo', 'bar', 'baz'.
2144 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2145 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2147 -- Notice that no attempt is made to fully replace the 'standard'
2148 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2149 -- that this will cause too much breakage for users & ':' will
2150 -- work fine even with DOS paths, if you're not insisting on being silly.
2153 splitUp (x:':':div:xs) | div `elem` dir_markers
2154 = ((x:':':div:p): splitUp rs)
2156 (p,rs) = findNextPath xs
2157 -- we used to check for existence of the path here, but that
2158 -- required the IO monad to be threaded through the command-line
2159 -- parser which is quite inconvenient. The
2160 splitUp xs = cons p (splitUp rs)
2162 (p,rs) = findNextPath xs
2167 -- will be called either when we've consumed nought or the
2168 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2169 -- finding the next split marker.
2171 case break (`elem` split_markers) xs of
2172 (p, _:ds) -> (p, ds)
2175 split_markers :: [Char]
2176 split_markers = [':', ';']
2178 dir_markers :: [Char]
2179 dir_markers = ['/', '\\']
2182 -- -----------------------------------------------------------------------------
2183 -- tmpDir, where we store temporary files.
2185 setTmpDir :: FilePath -> DynFlags -> DynFlags
2186 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2187 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2188 -- seem necessary now --SDM 7/2/2008
2190 -----------------------------------------------------------------------------
2193 setRtsOpts :: String -> DynP ()
2194 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2196 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2197 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2199 -----------------------------------------------------------------------------
2202 setOptHpcDir :: String -> DynP ()
2203 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2205 -----------------------------------------------------------------------------
2206 -- Via-C compilation stuff
2208 -- There are some options that we need to pass to gcc when compiling
2209 -- Haskell code via C, but are only supported by recent versions of
2210 -- gcc. The configure script decides which of these options we need,
2211 -- and puts them in the "settings" file in $topdir. The advantage of
2212 -- having these in a separate file is that the file can be created at
2213 -- install-time depending on the available gcc version, and even
2214 -- re-generated later if gcc is upgraded.
2216 -- The options below are not dependent on the version of gcc, only the
2219 picCCOpts :: DynFlags -> [String]
2221 #if darwin_TARGET_OS
2222 -- Apple prefers to do things the other way round.
2223 -- PIC is on by default.
2224 -- -mdynamic-no-pic:
2225 -- Turn off PIC code generation.
2227 -- Don't generate "common" symbols - these are unwanted
2228 -- in dynamic libraries.
2231 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2233 = ["-mdynamic-no-pic"]
2234 #elif mingw32_TARGET_OS
2235 -- no -fPIC for Windows
2237 = ["-U __PIC__","-D__PIC__"]
2241 -- we need -fPIC for C files when we are compiling with -dynamic,
2242 -- otherwise things like stub.c files don't get compiled
2243 -- correctly. They need to reference data in the Haskell
2244 -- objects, but can't without -fPIC. See
2245 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2246 | opt_PIC || not opt_Static
2247 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2252 -- -----------------------------------------------------------------------------
2256 can_split = cSupportsSplitObjs == "YES"
2258 -- -----------------------------------------------------------------------------
2261 compilerInfo :: DynFlags -> [(String, String)]
2263 = -- We always make "Project name" be first to keep parsing in
2264 -- other languages simple, i.e. when looking for other fields,
2265 -- you don't have to worry whether there is a leading '[' or not
2266 ("Project name", cProjectName)
2267 -- Next come the settings, so anything else can be overridden
2268 -- in the settings file (as "lookup" uses the first match for the
2270 : rawSettings dflags
2271 ++ [("Project version", cProjectVersion),
2272 ("Booter version", cBooterVersion),
2274 ("Build platform", cBuildPlatformString),
2275 ("Host platform", cHostPlatformString),
2276 ("Target platform", cTargetPlatformString),
2277 ("Have interpreter", cGhcWithInterpreter),
2278 ("Object splitting supported", cSupportsSplitObjs),
2279 ("Have native code generator", cGhcWithNativeCodeGen),
2280 ("Support SMP", cGhcWithSMP),
2281 ("Unregisterised", cGhcUnregisterised),
2282 ("Tables next to code", cGhcEnableTablesNextToCode),
2283 ("RTS ways", cGhcRTSWays),
2284 ("Leading underscore", cLeadingUnderscore),
2285 ("Debug on", show debugIsOn),
2286 ("LibDir", topDir dflags),
2287 ("Global Package DB", systemPackageConfig dflags),
2288 ("Gcc Linker flags", show cGccLinkerOpts),
2289 ("Ld Linker flags", show cLdLinkerOpts)
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