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_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
345 | Opt_DeriveGeneric -- Allow deriving Generic/1
346 | Opt_DefaultSignatures -- Allow extra signatures for defmeths
347 | Opt_Generics -- Generic deriving mechanism
349 | Opt_TypeSynonymInstances
350 | Opt_FlexibleContexts
351 | Opt_FlexibleInstances
352 | Opt_ConstrainedClassMethods
353 | Opt_MultiParamTypeClasses
354 | Opt_FunctionalDependencies
356 | Opt_PolymorphicComponents
357 | Opt_ExistentialQuantification
361 | Opt_ParallelListComp
362 | Opt_TransformListComp
363 | Opt_MonadComprehensions
364 | Opt_GeneralizedNewtypeDeriving
367 | Opt_PostfixOperators
370 | Opt_LiberalTypeSynonyms
373 | Opt_ImpredicativeTypes
377 | Opt_AlternativeLayoutRule
378 | Opt_AlternativeLayoutRuleTransitional
379 | Opt_DatatypeContexts
380 | Opt_NondecreasingIndentation
384 -- | Contains not only a collection of 'DynFlag's but also a plethora of
385 -- information relating to the compilation of a single file or GHC session
386 data DynFlags = DynFlags {
389 hscTarget :: HscTarget,
390 hscOutName :: String, -- ^ Name of the output file
391 extCoreName :: String, -- ^ Name of the .hcr output file
392 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
393 optLevel :: Int, -- ^ Optimisation level
394 simplPhases :: Int, -- ^ Number of simplifier phases
395 maxSimplIterations :: Int, -- ^ Max simplifier iterations
396 shouldDumpSimplPhase :: Maybe String,
397 ruleCheck :: Maybe String,
398 strictnessBefore :: [Int], -- ^ Additional demand analysis
400 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
401 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
402 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
403 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
404 -- See CoreMonad.FloatOutSwitches
406 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
407 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
408 importPaths :: [FilePath],
410 mainFunIs :: Maybe String,
411 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
413 dphBackend :: DPHBackend,
415 thisPackage :: PackageId, -- ^ name of package currently being compiled
418 ways :: [Way], -- ^ Way flags from the command line
419 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
420 rtsBuildTag :: String, -- ^ The RTS \"way\"
422 -- For object splitting
423 splitInfo :: Maybe (String,Int),
426 objectDir :: Maybe String,
427 dylibInstallName :: Maybe String,
428 hiDir :: Maybe String,
429 stubDir :: Maybe String,
435 outputFile :: Maybe String,
436 outputHi :: Maybe String,
437 dynLibLoader :: DynLibLoader,
439 -- | This is set by 'DriverPipeline.runPipeline' based on where
440 -- its output is going.
441 dumpPrefix :: Maybe FilePath,
443 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
444 -- Set by @-ddump-file-prefix@
445 dumpPrefixForce :: Maybe FilePath,
447 includePaths :: [String],
448 libraryPaths :: [String],
449 frameworkPaths :: [String], -- used on darwin only
450 cmdlineFrameworks :: [String], -- ditto
452 rtsOpts :: Maybe String,
453 rtsOptsEnabled :: RtsOptsEnabled,
455 hpcDir :: String, -- ^ Path to store the .mix files
457 settings :: Settings,
460 depMakefile :: FilePath,
461 depIncludePkgDeps :: Bool,
462 depExcludeMods :: [ModuleName],
463 depSuffixes :: [String],
466 extraPkgConfs :: [FilePath],
467 -- ^ The @-package-conf@ flags given on the command line, in the order
470 packageFlags :: [PackageFlag],
471 -- ^ The @-package@ and @-hide-package@ flags from the command-line
474 -- NB. do not modify this field, it is calculated by
475 -- Packages.initPackages and Packages.updatePackages.
476 pkgDatabase :: Maybe [PackageConfig],
477 pkgState :: PackageState,
480 -- These have to be IORefs, because the defaultCleanupHandler needs to
481 -- know what to clean when an exception happens
482 filesToClean :: IORef [FilePath],
483 dirsToClean :: IORef (Map FilePath FilePath),
487 -- Don't change this without updating extensionFlags:
488 language :: Maybe Language,
489 -- Don't change this without updating extensionFlags:
490 extensions :: [OnOff ExtensionFlag],
491 -- extensionFlags should always be equal to
492 -- flattenExtensionFlags language extensions
493 extensionFlags :: [ExtensionFlag],
495 -- | Message output action: use "ErrUtils" instead of this if you can
496 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
498 haddockOptions :: Maybe String
501 data Settings = Settings {
502 sGhcUsagePath :: FilePath, -- Filled in by SysTools
503 sGhciUsagePath :: FilePath, -- ditto
505 sTmpDir :: String, -- no trailing '/'
506 -- You shouldn't need to look things up in rawSettings directly.
507 -- They should have their own fields instead.
508 sRawSettings :: [(String, String)],
509 sExtraGccViaCFlags :: [String],
510 sSystemPackageConfig :: FilePath,
511 -- commands for particular phases
513 sPgm_P :: (String,[Option]),
515 sPgm_c :: (String,[Option]),
516 sPgm_s :: (String,[Option]),
517 sPgm_a :: (String,[Option]),
518 sPgm_l :: (String,[Option]),
519 sPgm_dll :: (String,[Option]),
521 sPgm_sysman :: String,
522 sPgm_windres :: String,
523 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
524 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
525 -- options for particular phases
533 sOpt_windres :: [String],
534 sOpt_lo :: [String], -- LLVM: llvm optimiser
535 sOpt_lc :: [String] -- LLVM: llc static compiler
539 ghcUsagePath :: DynFlags -> FilePath
540 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
541 ghciUsagePath :: DynFlags -> FilePath
542 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
543 topDir :: DynFlags -> FilePath
544 topDir dflags = sTopDir (settings dflags)
545 tmpDir :: DynFlags -> String
546 tmpDir dflags = sTmpDir (settings dflags)
547 rawSettings :: DynFlags -> [(String, String)]
548 rawSettings dflags = sRawSettings (settings dflags)
549 extraGccViaCFlags :: DynFlags -> [String]
550 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
551 systemPackageConfig :: DynFlags -> FilePath
552 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
553 pgm_L :: DynFlags -> String
554 pgm_L dflags = sPgm_L (settings dflags)
555 pgm_P :: DynFlags -> (String,[Option])
556 pgm_P dflags = sPgm_P (settings dflags)
557 pgm_F :: DynFlags -> String
558 pgm_F dflags = sPgm_F (settings dflags)
559 pgm_c :: DynFlags -> (String,[Option])
560 pgm_c dflags = sPgm_c (settings dflags)
561 pgm_s :: DynFlags -> (String,[Option])
562 pgm_s dflags = sPgm_s (settings dflags)
563 pgm_a :: DynFlags -> (String,[Option])
564 pgm_a dflags = sPgm_a (settings dflags)
565 pgm_l :: DynFlags -> (String,[Option])
566 pgm_l dflags = sPgm_l (settings dflags)
567 pgm_dll :: DynFlags -> (String,[Option])
568 pgm_dll dflags = sPgm_dll (settings dflags)
569 pgm_T :: DynFlags -> String
570 pgm_T dflags = sPgm_T (settings dflags)
571 pgm_sysman :: DynFlags -> String
572 pgm_sysman dflags = sPgm_sysman (settings dflags)
573 pgm_windres :: DynFlags -> String
574 pgm_windres dflags = sPgm_windres (settings dflags)
575 pgm_lo :: DynFlags -> (String,[Option])
576 pgm_lo dflags = sPgm_lo (settings dflags)
577 pgm_lc :: DynFlags -> (String,[Option])
578 pgm_lc dflags = sPgm_lc (settings dflags)
579 opt_L :: DynFlags -> [String]
580 opt_L dflags = sOpt_L (settings dflags)
581 opt_P :: DynFlags -> [String]
582 opt_P dflags = sOpt_P (settings dflags)
583 opt_F :: DynFlags -> [String]
584 opt_F dflags = sOpt_F (settings dflags)
585 opt_c :: DynFlags -> [String]
586 opt_c dflags = sOpt_c (settings dflags)
587 opt_m :: DynFlags -> [String]
588 opt_m dflags = sOpt_m (settings dflags)
589 opt_a :: DynFlags -> [String]
590 opt_a dflags = sOpt_a (settings dflags)
591 opt_l :: DynFlags -> [String]
592 opt_l dflags = sOpt_l (settings dflags)
593 opt_windres :: DynFlags -> [String]
594 opt_windres dflags = sOpt_windres (settings dflags)
595 opt_lo :: DynFlags -> [String]
596 opt_lo dflags = sOpt_lo (settings dflags)
597 opt_lc :: DynFlags -> [String]
598 opt_lc dflags = sOpt_lc (settings dflags)
600 wayNames :: DynFlags -> [WayName]
601 wayNames = map wayName . ways
603 -- | The target code type of the compilation (if any).
605 -- Whenever you change the target, also make sure to set 'ghcLink' to
606 -- something sensible.
608 -- 'HscNothing' can be used to avoid generating any output, however, note
611 -- * This will not run the desugaring step, thus no warnings generated in
612 -- this step will be output. In particular, this includes warnings related
613 -- to pattern matching. You can run the desugarer manually using
614 -- 'GHC.desugarModule'.
616 -- * If a program uses Template Haskell the typechecker may try to run code
617 -- from an imported module. This will fail if no code has been generated
618 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
619 -- whether this might be the case and choose to either switch to a
620 -- different target or avoid typechecking such modules. (The latter may
621 -- preferable for security reasons.)
624 = HscC -- ^ Generate C code.
625 | HscAsm -- ^ Generate assembly using the native code generator.
626 | HscLlvm -- ^ Generate assembly using the llvm code generator.
627 | HscJava -- ^ Generate Java bytecode.
628 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
629 | HscNothing -- ^ Don't generate any code. See notes above.
632 showHscTargetFlag :: HscTarget -> String
633 showHscTargetFlag HscC = "-fvia-c"
634 showHscTargetFlag HscAsm = "-fasm"
635 showHscTargetFlag HscLlvm = "-fllvm"
636 showHscTargetFlag HscJava = panic "No flag for HscJava"
637 showHscTargetFlag HscInterpreted = "-fbyte-code"
638 showHscTargetFlag HscNothing = "-fno-code"
640 -- | Will this target result in an object file on the disk?
641 isObjectTarget :: HscTarget -> Bool
642 isObjectTarget HscC = True
643 isObjectTarget HscAsm = True
644 isObjectTarget HscLlvm = True
645 isObjectTarget _ = False
647 -- | The 'GhcMode' tells us whether we're doing multi-module
648 -- compilation (controlled via the "GHC" API) or one-shot
649 -- (single-module) compilation. This makes a difference primarily to
650 -- the "Finder": in one-shot mode we look for interface files for
651 -- imported modules, but in multi-module mode we look for source files
652 -- in order to check whether they need to be recompiled.
654 = CompManager -- ^ @\-\-make@, GHCi, etc.
655 | OneShot -- ^ @ghc -c Foo.hs@
656 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
659 instance Outputable GhcMode where
660 ppr CompManager = ptext (sLit "CompManager")
661 ppr OneShot = ptext (sLit "OneShot")
662 ppr MkDepend = ptext (sLit "MkDepend")
664 isOneShot :: GhcMode -> Bool
665 isOneShot OneShot = True
666 isOneShot _other = False
668 -- | What to do in the link step, if there is one.
670 = NoLink -- ^ Don't link at all
671 | LinkBinary -- ^ Link object code into a binary
672 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
673 -- bytecode and object code).
674 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
677 isNoLink :: GhcLink -> Bool
678 isNoLink NoLink = True
681 -- Is it worth evaluating this Bool and caching it in the DynFlags value
682 -- during initDynFlags?
683 doingTickyProfiling :: DynFlags -> Bool
684 doingTickyProfiling _ = opt_Ticky
685 -- XXX -ticky is a static flag, because it implies -debug which is also
686 -- static. If the way flags were made dynamic, we could fix this.
689 = ExposePackage String
690 | ExposePackageId String
692 | IgnorePackage String
695 defaultHscTarget :: HscTarget
696 defaultHscTarget = defaultObjectTarget
698 -- | The 'HscTarget' value corresponding to the default way to create
699 -- object files on the current platform.
700 defaultObjectTarget :: HscTarget
702 | cGhcUnregisterised == "YES" = HscC
703 | cGhcWithNativeCodeGen == "YES" = HscAsm
704 | otherwise = HscLlvm
711 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
714 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
715 initDynFlags :: DynFlags -> IO DynFlags
716 initDynFlags dflags = do
717 -- someday these will be dynamic flags
718 ways <- readIORef v_Ways
719 refFilesToClean <- newIORef []
720 refDirsToClean <- newIORef Map.empty
723 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
724 rtsBuildTag = mkBuildTag ways,
725 filesToClean = refFilesToClean,
726 dirsToClean = refDirsToClean
729 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
730 -- and must be fully initialized by 'GHC.newSession' first.
731 defaultDynFlags :: Settings -> DynFlags
732 defaultDynFlags mySettings =
734 ghcMode = CompManager,
735 ghcLink = LinkBinary,
736 hscTarget = defaultHscTarget,
742 maxSimplIterations = 4,
743 shouldDumpSimplPhase = Nothing,
745 specConstrThreshold = Just 200,
746 specConstrCount = Just 3,
747 liberateCaseThreshold = Just 200,
748 floatLamArgs = Just 0, -- Default: float only if no fvs
749 strictnessBefore = [],
751 targetPlatform = defaultTargetPlatform,
752 cmdlineHcIncludes = [],
756 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
758 dphBackend = DPHNone,
760 thisPackage = mainPackageId,
763 dylibInstallName = Nothing,
767 objectSuf = phaseInputExt StopLn,
768 hcSuf = phaseInputExt HCc,
771 outputFile = Nothing,
773 dynLibLoader = SystemDependent,
774 dumpPrefix = Nothing,
775 dumpPrefixForce = Nothing,
779 cmdlineFrameworks = [],
781 rtsOptsEnabled = RtsOptsSafeOnly,
787 pkgDatabase = Nothing,
788 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
789 ways = panic "defaultDynFlags: No ways",
790 buildTag = panic "defaultDynFlags: No buildTag",
791 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
793 settings = mySettings,
795 depMakefile = "Makefile",
796 depIncludePkgDeps = False,
799 -- end of ghc -M values
800 filesToClean = panic "defaultDynFlags: No filesToClean",
801 dirsToClean = panic "defaultDynFlags: No dirsToClean",
802 haddockOptions = Nothing,
803 flags = defaultFlags,
806 extensionFlags = flattenExtensionFlags Nothing [],
808 log_action = \severity srcSpan style msg ->
810 SevOutput -> printOutput (msg style)
811 SevInfo -> printErrs (msg style)
812 SevFatal -> printErrs (msg style)
815 printErrs ((mkLocMessage srcSpan msg) style)
816 -- careful (#2302): printErrs prints in UTF-8, whereas
817 -- converting to string first and using hPutStr would
818 -- just emit the low 8 bits of each unicode char.
822 Note [Verbosity levels]
823 ~~~~~~~~~~~~~~~~~~~~~~~
824 0 | print errors & warnings only
825 1 | minimal verbosity: print "compiling M ... done." for each module.
826 2 | equivalent to -dshow-passes
827 3 | equivalent to existing "ghc -v"
828 4 | "ghc -v -ddump-most"
829 5 | "ghc -v -ddump-all"
835 -- OnOffs accumulate in reverse order, so we use foldr in order to
836 -- process them in the right order
837 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
839 flattenExtensionFlags ml = foldr f defaultExtensionFlags
840 where f (On f) flags = f : delete f flags
841 f (Off f) flags = delete f flags
842 defaultExtensionFlags = languageExtensions ml
844 languageExtensions :: Maybe Language -> [ExtensionFlag]
846 languageExtensions Nothing
847 -- Nothing => the default case
848 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
849 -- behaviour the default, to see if anyone notices
851 -- In due course I'd like Opt_MonoLocalBinds to be on by default
852 -- But NB it's implied by GADTs etc
853 -- SLPJ September 2010
854 : Opt_NondecreasingIndentation -- This has been on by default for some time
855 : languageExtensions (Just Haskell2010)
857 languageExtensions (Just Haskell98)
858 = [Opt_ImplicitPrelude,
859 Opt_MonomorphismRestriction,
861 Opt_DatatypeContexts,
862 Opt_NondecreasingIndentation
863 -- strictly speaking non-standard, but we always had this
864 -- on implicitly before the option was added in 7.1, and
865 -- turning it off breaks code, so we're keeping it on for
866 -- backwards compatibility. Cabal uses -XHaskell98 by
867 -- default unless you specify another language.
870 languageExtensions (Just Haskell2010)
871 = [Opt_ImplicitPrelude,
872 Opt_MonomorphismRestriction,
873 Opt_DatatypeContexts,
875 Opt_ForeignFunctionInterface,
880 -- | Test whether a 'DynFlag' is set
881 dopt :: DynFlag -> DynFlags -> Bool
882 dopt f dflags = f `elem` (flags dflags)
885 dopt_set :: DynFlags -> DynFlag -> DynFlags
886 dopt_set dfs f = dfs{ flags = f : flags dfs }
888 -- | Unset a 'DynFlag'
889 dopt_unset :: DynFlags -> DynFlag -> DynFlags
890 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
892 -- | Test whether a 'ExtensionFlag' is set
893 xopt :: ExtensionFlag -> DynFlags -> Bool
894 xopt f dflags = f `elem` extensionFlags dflags
896 -- | Set a 'ExtensionFlag'
897 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
899 = let onoffs = On f : extensions dfs
900 in dfs { extensions = onoffs,
901 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
903 -- | Unset a 'ExtensionFlag'
904 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
906 = let onoffs = Off f : extensions dfs
907 in dfs { extensions = onoffs,
908 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
910 setLanguage :: Language -> DynP ()
911 setLanguage l = upd f
912 where f dfs = let mLang = Just l
913 oneoffs = extensions dfs
916 extensionFlags = flattenExtensionFlags mLang oneoffs
919 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
920 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
921 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
922 -> [a] -- ^ Correctly ordered extracted options
923 getOpts dflags opts = reverse (opts dflags)
924 -- We add to the options from the front, so we need to reverse the list
926 -- | Gets the verbosity flag for the current verbosity level. This is fed to
927 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
928 getVerbFlags :: DynFlags -> [String]
930 | verbosity dflags >= 4 = ["-v"]
933 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
934 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
935 setPgmP, addOptl, addOptP,
936 addCmdlineFramework, addHaddockOpts
937 :: String -> DynFlags -> DynFlags
938 setOutputFile, setOutputHi, setDumpPrefixForce
939 :: Maybe String -> DynFlags -> DynFlags
941 setObjectDir f d = d{ objectDir = Just f}
942 setHiDir f d = d{ hiDir = Just f}
943 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
944 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
945 -- \#included from the .hc file when compiling via C (i.e. unregisterised
947 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
948 setDylibInstallName f d = d{ dylibInstallName = Just f}
950 setObjectSuf f d = d{ objectSuf = f}
951 setHiSuf f d = d{ hiSuf = f}
952 setHcSuf f d = d{ hcSuf = f}
954 setOutputFile f d = d{ outputFile = f}
955 setOutputHi f d = d{ outputHi = f}
957 parseDynLibLoaderMode f d =
959 ("deploy", "") -> d{ dynLibLoader = Deployable }
960 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
961 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
963 setDumpPrefixForce f d = d { dumpPrefixForce = f}
965 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
966 -- Config.hs should really use Option.
967 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
968 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
969 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
972 setDepMakefile :: FilePath -> DynFlags -> DynFlags
973 setDepMakefile f d = d { depMakefile = deOptDep f }
975 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
976 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
978 addDepExcludeMod :: String -> DynFlags -> DynFlags
980 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
982 addDepSuffix :: FilePath -> DynFlags -> DynFlags
983 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
986 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
987 -- we need to strip the "-optdep" off of the arg
988 deOptDep :: String -> String
989 deOptDep x = case stripPrefix "-optdep" x of
993 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
995 addHaddockOpts f d = d{ haddockOptions = Just f}
997 -- -----------------------------------------------------------------------------
998 -- Command-line options
1000 -- | When invoking external tools as part of the compilation pipeline, we
1001 -- pass these a sequence of options on the command-line. Rather than
1002 -- just using a list of Strings, we use a type that allows us to distinguish
1003 -- between filepaths and 'other stuff'. The reason for this is that
1004 -- this type gives us a handle on transforming filenames, and filenames only,
1005 -- to whatever format they're expected to be on a particular platform.
1007 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1008 String -- a non-filepath prefix that shouldn't be
1009 -- transformed (e.g., "/out=")
1010 String -- the filepath/filename portion
1013 showOpt :: Option -> String
1014 showOpt (FileOption pre f) = pre ++ f
1015 showOpt (Option s) = s
1017 -----------------------------------------------------------------------------
1018 -- Setting the optimisation level
1020 updOptLevel :: Int -> DynFlags -> DynFlags
1021 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1023 = dfs2{ optLevel = final_n }
1025 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1026 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1027 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1029 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1030 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1032 -- -----------------------------------------------------------------------------
1033 -- StgToDo: abstraction of stg-to-stg passes to run.
1036 = StgDoMassageForProfiling -- should be (next to) last
1037 -- There's also setStgVarInfo, but its absolute "lastness"
1038 -- is so critical that it is hardwired in (no flag).
1041 getStgToDo :: DynFlags -> [StgToDo]
1045 stg_stats = dopt Opt_StgStats dflags
1047 todo1 = if stg_stats then [D_stg_stats] else []
1049 todo2 | WayProf `elem` wayNames dflags
1050 = StgDoMassageForProfiling : todo1
1054 {- **********************************************************************
1058 %********************************************************************* -}
1060 -- -----------------------------------------------------------------------------
1061 -- Parsing the dynamic flags.
1063 -- | Parse dynamic flags from a list of command line arguments. Returns the
1064 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1065 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1066 -- flags or missing arguments).
1067 parseDynamicFlags :: Monad m =>
1068 DynFlags -> [Located String]
1069 -> m (DynFlags, [Located String], [Located String])
1070 -- ^ Updated 'DynFlags', left-over arguments, and
1071 -- list of warnings.
1072 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1074 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1075 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1076 parseDynamicNoPackageFlags :: Monad m =>
1077 DynFlags -> [Located String]
1078 -> m (DynFlags, [Located String], [Located String])
1079 -- ^ Updated 'DynFlags', left-over arguments, and
1080 -- list of warnings.
1081 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1083 parseDynamicFlags_ :: Monad m =>
1084 DynFlags -> [Located String] -> Bool
1085 -> m (DynFlags, [Located String], [Located String])
1086 parseDynamicFlags_ dflags0 args pkg_flags = do
1087 -- XXX Legacy support code
1088 -- We used to accept things like
1089 -- optdep-f -optdepdepend
1090 -- optdep-f -optdep depend
1091 -- optdep -f -optdepdepend
1092 -- optdep -f -optdep depend
1093 -- but the spaces trip up proper argument handling. So get rid of them.
1094 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1095 f (x : xs) = x : f xs
1099 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1100 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1101 | otherwise = dynamic_flags
1103 let ((leftover, errs, warns), dflags1)
1104 = runCmdLine (processArgs flag_spec args') dflags0
1105 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1107 let (pic_warns, dflags2)
1108 | not (cTargetArch == X86_64 && (cTargetOS == Linux || cTargetOS == OSX)) &&
1109 (not opt_Static || opt_PIC) &&
1110 hscTarget dflags1 == HscLlvm
1111 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and "
1112 ++ "-dynamic on this platform;\n"
1114 ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
1115 dflags1{ hscTarget = defaultObjectTarget })
1116 | otherwise = ([], dflags1)
1118 return (dflags2, leftover, pic_warns ++ warns)
1121 {- **********************************************************************
1123 DynFlags specifications
1125 %********************************************************************* -}
1127 allFlags :: [String]
1128 allFlags = map ('-':) $
1129 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1130 map ("fno-"++) flags ++
1131 map ("f"++) flags ++
1132 map ("f"++) flags' ++
1133 map ("X"++) supportedExtensions
1134 where ok (PrefixPred _ _) = False
1136 flags = [ name | (name, _, _) <- fFlags ]
1137 flags' = [ name | (name, _, _) <- fLangFlags ]
1139 --------------- The main flags themselves ------------------
1140 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1142 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1143 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1144 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1146 (HasArg (\s -> do { addCmdlineHCInclude s
1147 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1148 , Flag "v" (OptIntSuffix setVerbosity)
1150 ------- Specific phases --------------------------------------------
1151 -- need to appear before -pgmL to be parsed as LLVM flags.
1152 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1153 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1154 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1155 , Flag "pgmP" (hasArg setPgmP)
1156 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1157 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1158 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1159 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1160 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1161 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1162 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1163 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1165 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1166 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1167 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1168 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1169 , Flag "optP" (hasArg addOptP)
1170 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1171 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1172 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1173 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1174 , Flag "optl" (hasArg addOptl)
1175 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1178 (NoArg (if can_split
1179 then setDynFlag Opt_SplitObjs
1180 else addWarn "ignoring -fsplit-objs"))
1182 -------- ghc -M -----------------------------------------------------
1183 , Flag "dep-suffix" (hasArg addDepSuffix)
1184 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1185 , Flag "dep-makefile" (hasArg setDepMakefile)
1186 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1187 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1188 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1189 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1190 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1191 , Flag "exclude-module" (hasArg addDepExcludeMod)
1192 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1193 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1195 -------- Linking ----------------------------------------------------
1196 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1197 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1198 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1199 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1201 ------- Libraries ---------------------------------------------------
1202 , Flag "L" (Prefix addLibraryPath)
1203 , Flag "l" (AnySuffix (upd . addOptl))
1205 ------- Frameworks --------------------------------------------------
1206 -- -framework-path should really be -F ...
1207 , Flag "framework-path" (HasArg addFrameworkPath)
1208 , Flag "framework" (hasArg addCmdlineFramework)
1210 ------- Output Redirection ------------------------------------------
1211 , Flag "odir" (hasArg setObjectDir)
1212 , Flag "o" (SepArg (upd . setOutputFile . Just))
1213 , Flag "ohi" (hasArg (setOutputHi . Just ))
1214 , Flag "osuf" (hasArg setObjectSuf)
1215 , Flag "hcsuf" (hasArg setHcSuf)
1216 , Flag "hisuf" (hasArg setHiSuf)
1217 , Flag "hidir" (hasArg setHiDir)
1218 , Flag "tmpdir" (hasArg setTmpDir)
1219 , Flag "stubdir" (hasArg setStubDir)
1220 , Flag "outputdir" (hasArg setOutputDir)
1221 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1223 ------- Keeping temporary files -------------------------------------
1224 -- These can be singular (think ghc -c) or plural (think ghc --make)
1225 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1226 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1227 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1228 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1229 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1230 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1231 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1232 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1233 -- This only makes sense as plural
1234 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1236 ------- Miscellaneous ----------------------------------------------
1237 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1238 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1239 , Flag "with-rtsopts" (HasArg setRtsOpts)
1240 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1241 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1242 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1243 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1244 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1245 , Flag "main-is" (SepArg setMainIs)
1246 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1247 , Flag "haddock-opts" (hasArg addHaddockOpts)
1248 , Flag "hpcdir" (SepArg setOptHpcDir)
1250 ------- recompilation checker --------------------------------------
1251 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1252 ; deprecate "Use -fno-force-recomp instead" }))
1253 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1254 ; deprecate "Use -fforce-recomp instead" }))
1256 ------ HsCpp opts ---------------------------------------------------
1257 , Flag "D" (AnySuffix (upd . addOptP))
1258 , Flag "U" (AnySuffix (upd . addOptP))
1260 ------- Include/Import Paths ----------------------------------------
1261 , Flag "I" (Prefix addIncludePath)
1262 , Flag "i" (OptPrefix addImportPath)
1264 ------ Debugging ----------------------------------------------------
1265 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1267 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1268 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1269 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1270 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1271 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1272 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1273 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1274 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1275 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1276 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1277 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1278 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1279 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1280 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1281 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1282 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1283 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1284 ; setDumpFlag' Opt_D_dump_llvm}))
1285 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1286 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1287 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1288 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1289 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1290 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1291 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1292 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1293 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1294 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1295 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1296 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1297 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1298 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1299 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1300 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1301 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1302 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1303 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1304 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1305 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1306 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1307 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1308 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1309 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1310 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1311 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1312 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1313 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1314 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1315 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1316 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1317 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1318 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1319 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1320 ; setVerboseCore2Core }))
1321 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1322 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1323 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1324 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1325 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1326 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1327 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1328 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1329 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1330 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1331 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1332 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1333 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1334 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1335 , Flag "dshow-passes" (NoArg (do forceRecompile
1336 setVerbosity (Just 2)))
1337 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1339 ------ Machine dependant (-m<blah>) stuff ---------------------------
1341 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1342 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1343 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1344 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1346 ------ Warning opts -------------------------------------------------
1347 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1348 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1349 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1350 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1351 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1352 ; deprecate "Use -w instead" }))
1353 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1355 ------ Optimisation flags ------------------------------------------
1356 , Flag "O" (noArgM (setOptLevel 1))
1357 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1358 setOptLevel 0 dflags))
1359 , Flag "Odph" (noArgM setDPHOpt)
1360 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1361 -- If the number is missing, use 1
1363 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1364 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1365 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1366 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1367 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1368 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1369 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1370 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1371 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1372 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1373 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1374 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1375 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1377 ------ Profiling ----------------------------------------------------
1379 -- XXX Should the -f* flags be deprecated?
1380 -- They don't seem to be documented
1381 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1382 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1383 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1384 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1385 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1386 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1387 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1388 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1389 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1391 ------ DPH flags ----------------------------------------------------
1393 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1394 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1395 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1396 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1398 ------ Compiler flags -----------------------------------------------
1400 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1401 , Flag "fvia-c" (NoArg
1402 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1403 , Flag "fvia-C" (NoArg
1404 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1405 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1407 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1408 setTarget HscNothing))
1409 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1410 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1411 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1412 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1414 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1415 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1416 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1417 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1418 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1419 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1420 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1422 package_flags :: [Flag (CmdLineP DynFlags)]
1424 ------- Packages ----------------------------------------------------
1425 Flag "package-conf" (HasArg extraPkgConf_)
1426 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1427 , Flag "package-name" (hasArg setPackageName)
1428 , Flag "package-id" (HasArg exposePackageId)
1429 , Flag "package" (HasArg exposePackage)
1430 , Flag "hide-package" (HasArg hidePackage)
1431 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1432 , Flag "ignore-package" (HasArg ignorePackage)
1433 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1434 ; deprecate "Use -package instead" }))
1437 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1438 -- False <=> we are turning the flag off
1439 turnOn :: TurnOnFlag; turnOn = True
1440 turnOff :: TurnOnFlag; turnOff = False
1443 = ( String -- Flag in string form
1444 , flag -- Flag in internal form
1445 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1446 -- Typically, emit a warning or error
1448 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1449 -> String -- ^ The flag prefix
1450 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1451 -> FlagSpec flag -- ^ Specification of this particular flag
1452 -> Flag (CmdLineP DynFlags)
1453 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1454 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1456 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1457 deprecatedForExtension lang turn_on
1458 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1460 flag | turn_on = lang
1461 | otherwise = "No"++lang
1463 useInstead :: String -> TurnOnFlag -> DynP ()
1464 useInstead flag turn_on
1465 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1467 no = if turn_on then "" else "no-"
1469 nop :: TurnOnFlag -> DynP ()
1472 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1473 fFlags :: [FlagSpec DynFlag]
1475 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1476 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1477 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1478 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1479 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1480 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1481 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1482 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1483 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1484 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1485 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1486 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1487 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1488 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1489 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1490 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1491 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1492 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1493 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1494 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1495 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1496 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1497 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1498 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1499 ( "warn-orphans", Opt_WarnOrphans, nop ),
1500 ( "warn-identities", Opt_WarnIdentities, nop ),
1501 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1502 ( "warn-tabs", Opt_WarnTabs, nop ),
1503 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1504 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1505 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1506 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1507 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1508 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1509 ( "strictness", Opt_Strictness, nop ),
1510 ( "specialise", Opt_Specialise, nop ),
1511 ( "float-in", Opt_FloatIn, nop ),
1512 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1513 ( "full-laziness", Opt_FullLaziness, nop ),
1514 ( "liberate-case", Opt_LiberateCase, nop ),
1515 ( "spec-constr", Opt_SpecConstr, nop ),
1516 ( "cse", Opt_CSE, nop ),
1517 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1518 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1519 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1520 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1521 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1522 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1523 ( "case-merge", Opt_CaseMerge, nop ),
1524 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1525 ( "method-sharing", Opt_MethodSharing,
1526 \_ -> deprecate "doesn't do anything any more"),
1527 -- Remove altogether in GHC 7.2
1528 ( "dicts-cheap", Opt_DictsCheap, nop ),
1529 ( "excess-precision", Opt_ExcessPrecision, nop ),
1530 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1531 ( "print-bind-result", Opt_PrintBindResult, nop ),
1532 ( "force-recomp", Opt_ForceRecomp, nop ),
1533 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1534 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1535 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1536 ( "break-on-exception", Opt_BreakOnException, nop ),
1537 ( "break-on-error", Opt_BreakOnError, nop ),
1538 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1539 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1540 ( "run-cps", Opt_RunCPS, nop ),
1541 ( "run-cpsz", Opt_RunCPSZ, nop ),
1542 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1543 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1544 ( "vectorise", Opt_Vectorise, nop ),
1545 ( "regs-graph", Opt_RegsGraph, nop ),
1546 ( "regs-iterative", Opt_RegsIterative, nop ),
1547 ( "gen-manifest", Opt_GenManifest, nop ),
1548 ( "embed-manifest", Opt_EmbedManifest, nop ),
1549 ( "ext-core", Opt_EmitExternalCore, nop ),
1550 ( "shared-implib", Opt_SharedImplib, nop ),
1551 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1552 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1553 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1554 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1557 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1558 fLangFlags :: [FlagSpec ExtensionFlag]
1560 ( "th", Opt_TemplateHaskell,
1561 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1562 ( "fi", Opt_ForeignFunctionInterface,
1563 deprecatedForExtension "ForeignFunctionInterface" ),
1564 ( "ffi", Opt_ForeignFunctionInterface,
1565 deprecatedForExtension "ForeignFunctionInterface" ),
1566 ( "arrows", Opt_Arrows,
1567 deprecatedForExtension "Arrows" ),
1568 ( "generics", Opt_Generics,
1569 deprecatedForExtension "Generics" ),
1570 ( "implicit-prelude", Opt_ImplicitPrelude,
1571 deprecatedForExtension "ImplicitPrelude" ),
1572 ( "bang-patterns", Opt_BangPatterns,
1573 deprecatedForExtension "BangPatterns" ),
1574 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1575 deprecatedForExtension "MonomorphismRestriction" ),
1576 ( "mono-pat-binds", Opt_MonoPatBinds,
1577 deprecatedForExtension "MonoPatBinds" ),
1578 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1579 deprecatedForExtension "ExtendedDefaultRules" ),
1580 ( "implicit-params", Opt_ImplicitParams,
1581 deprecatedForExtension "ImplicitParams" ),
1582 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1583 deprecatedForExtension "ScopedTypeVariables" ),
1584 ( "parr", Opt_ParallelArrays,
1585 deprecatedForExtension "ParallelArrays" ),
1586 ( "PArr", Opt_ParallelArrays,
1587 deprecatedForExtension "ParallelArrays" ),
1588 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1589 deprecatedForExtension "OverlappingInstances" ),
1590 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1591 deprecatedForExtension "UndecidableInstances" ),
1592 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1593 deprecatedForExtension "IncoherentInstances" )
1596 supportedLanguages :: [String]
1597 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1599 supportedExtensions :: [String]
1600 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1602 supportedLanguagesAndExtensions :: [String]
1603 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1605 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1606 languageFlags :: [FlagSpec Language]
1608 ( "Haskell98", Haskell98, nop ),
1609 ( "Haskell2010", Haskell2010, nop )
1612 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1613 xFlags :: [FlagSpec ExtensionFlag]
1615 ( "CPP", Opt_Cpp, nop ),
1616 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1617 ( "TupleSections", Opt_TupleSections, nop ),
1618 ( "PatternGuards", Opt_PatternGuards, nop ),
1619 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1620 ( "MagicHash", Opt_MagicHash, nop ),
1621 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1622 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1623 ( "KindSignatures", Opt_KindSignatures, nop ),
1624 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1625 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1626 ( "TransformListComp", Opt_TransformListComp, nop ),
1627 ( "MonadComprehensions", Opt_MonadComprehensions, nop),
1628 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1629 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1630 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1631 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1632 ( "Rank2Types", Opt_Rank2Types, nop ),
1633 ( "RankNTypes", Opt_RankNTypes, nop ),
1634 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1635 ( "TypeOperators", Opt_TypeOperators, nop ),
1636 ( "RecursiveDo", Opt_RecursiveDo, -- Enables 'mdo'
1637 deprecatedForExtension "DoRec"),
1638 ( "DoRec", Opt_DoRec, nop ), -- Enables 'rec' keyword
1639 ( "Arrows", Opt_Arrows, nop ),
1640 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1641 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1642 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1643 ( "Generics", Opt_Generics, nop ),
1644 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1645 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1646 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1647 ( "RecordPuns", Opt_RecordPuns,
1648 deprecatedForExtension "NamedFieldPuns" ),
1649 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1650 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1651 ( "GADTs", Opt_GADTs, nop ),
1652 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1653 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1654 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1655 ( "BangPatterns", Opt_BangPatterns, nop ),
1656 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1657 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1658 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1659 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1660 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1661 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1662 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1663 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1664 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1665 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1666 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1667 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1668 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1669 \ turn_on -> if not turn_on
1670 then deprecate "You can't turn off RelaxedPolyRec any more"
1672 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1673 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1674 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1676 ( "PatternSignatures", Opt_ScopedTypeVariables,
1677 deprecatedForExtension "ScopedTypeVariables" ),
1679 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1680 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1681 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1682 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1683 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1684 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1685 ( "DeriveGeneric", Opt_DeriveGeneric, nop ),
1686 ( "DefaultSignatures", Opt_DefaultSignatures, nop ),
1687 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1688 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1689 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1690 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1691 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1692 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1693 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1694 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1695 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1696 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1697 ( "PackageImports", Opt_PackageImports, nop )
1700 defaultFlags :: [DynFlag]
1702 = [ Opt_AutoLinkPackages,
1703 Opt_ReadUserPackageConf,
1707 #if GHC_DEFAULT_NEW_CODEGEN
1713 Opt_PrintBindContents,
1718 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1719 -- The default -O0 options
1723 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1725 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1726 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1727 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1728 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1729 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1730 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1731 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1732 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1734 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1736 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1737 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1738 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1740 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1741 -- all over the place
1743 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1745 -- Record wild-cards implies field disambiguation
1746 -- Otherwise if you write (C {..}) you may well get
1747 -- stuff like " 'a' not in scope ", which is a bit silly
1748 -- if the compiler has just filled in field 'a' of constructor 'C'
1749 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1751 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1752 -- The new behavior of the XGenerics flag is just to turn on these two flags
1753 , (Opt_Generics, turnOn, Opt_DefaultSignatures)
1754 , (Opt_Generics, turnOn, Opt_DeriveGeneric)
1757 optLevelFlags :: [([Int], DynFlag)]
1759 = [ ([0], Opt_IgnoreInterfacePragmas)
1760 , ([0], Opt_OmitInterfacePragmas)
1762 , ([1,2], Opt_IgnoreAsserts)
1763 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1765 , ([1,2], Opt_DoEtaReduction)
1766 , ([1,2], Opt_CaseMerge)
1767 , ([1,2], Opt_Strictness)
1769 , ([1,2], Opt_FullLaziness)
1770 , ([1,2], Opt_Specialise)
1771 , ([1,2], Opt_FloatIn)
1773 , ([2], Opt_LiberateCase)
1774 , ([2], Opt_SpecConstr)
1775 , ([2], Opt_RegsGraph)
1777 -- , ([2], Opt_StaticArgumentTransformation)
1778 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1779 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1780 -- several improvements to the heuristics, and I'm concerned that without
1781 -- those changes SAT will interfere with some attempts to write "high
1782 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1783 -- this year. In particular, the version in HEAD lacks the tail call
1784 -- criterion, so many things that look like reasonable loops will be
1785 -- turned into functions with extra (unneccesary) thunk creation.
1787 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1788 -- This one is important for a tiresome reason:
1789 -- we want to make sure that the bindings for data
1790 -- constructors are eta-expanded. This is probably
1791 -- a good thing anyway, but it seems fragile.
1794 -- -----------------------------------------------------------------------------
1795 -- Standard sets of warning options
1797 standardWarnings :: [DynFlag]
1799 = [ Opt_WarnWarningsDeprecations,
1800 Opt_WarnDeprecatedFlags,
1801 Opt_WarnUnrecognisedPragmas,
1802 Opt_WarnOverlappingPatterns,
1803 Opt_WarnMissingFields,
1804 Opt_WarnMissingMethods,
1805 Opt_WarnDuplicateExports,
1806 Opt_WarnLazyUnliftedBindings,
1807 Opt_WarnDodgyForeignImports,
1808 Opt_WarnWrongDoBind,
1809 Opt_WarnAlternativeLayoutRuleTransitional
1812 minusWOpts :: [DynFlag]
1813 -- Things you get with -W
1815 = standardWarnings ++
1816 [ Opt_WarnUnusedBinds,
1817 Opt_WarnUnusedMatches,
1818 Opt_WarnUnusedImports,
1819 Opt_WarnIncompletePatterns,
1820 Opt_WarnDodgyExports,
1821 Opt_WarnDodgyImports
1824 minusWallOpts :: [DynFlag]
1825 -- Things you get with -Wall
1828 [ Opt_WarnTypeDefaults,
1829 Opt_WarnNameShadowing,
1830 Opt_WarnMissingSigs,
1833 Opt_WarnUnusedDoBind
1836 minuswRemovesOpts :: [DynFlag]
1837 -- minuswRemovesOpts should be every warning option
1841 Opt_WarnIncompletePatternsRecUpd,
1842 Opt_WarnIncompleteUniPatterns,
1843 Opt_WarnMonomorphism,
1844 Opt_WarnUnrecognisedPragmas,
1845 Opt_WarnAutoOrphans,
1846 Opt_WarnImplicitPrelude
1849 enableGlasgowExts :: DynP ()
1850 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1851 mapM_ setExtensionFlag glasgowExtsFlags
1853 disableGlasgowExts :: DynP ()
1854 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1855 mapM_ unSetExtensionFlag glasgowExtsFlags
1857 glasgowExtsFlags :: [ExtensionFlag]
1858 glasgowExtsFlags = [
1859 Opt_ForeignFunctionInterface
1860 , Opt_UnliftedFFITypes
1861 , Opt_ImplicitParams
1862 , Opt_ScopedTypeVariables
1864 , Opt_TypeSynonymInstances
1865 , Opt_StandaloneDeriving
1866 , Opt_DeriveDataTypeable
1868 , Opt_DeriveFoldable
1869 , Opt_DeriveTraversable
1871 , Opt_FlexibleContexts
1872 , Opt_FlexibleInstances
1873 , Opt_ConstrainedClassMethods
1874 , Opt_MultiParamTypeClasses
1875 , Opt_FunctionalDependencies
1877 , Opt_PolymorphicComponents
1878 , Opt_ExistentialQuantification
1880 , Opt_PostfixOperators
1882 , Opt_LiberalTypeSynonyms
1886 , Opt_ParallelListComp
1887 , Opt_EmptyDataDecls
1888 , Opt_KindSignatures
1889 , Opt_GeneralizedNewtypeDeriving ]
1892 -- Consult the RTS to find whether GHC itself has been built profiled
1893 -- If so, you can't use Template Haskell
1894 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1896 rtsIsProfiled :: Bool
1897 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1900 checkTemplateHaskellOk :: Bool -> DynP ()
1902 checkTemplateHaskellOk turn_on
1903 | turn_on && rtsIsProfiled
1904 = addErr "You can't use Template Haskell with a profiled compiler"
1908 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1909 -- so we simply say "ok". It doesn't matter because TH isn't
1910 -- available in stage 1 anyway.
1911 checkTemplateHaskellOk _ = return ()
1914 {- **********************************************************************
1916 DynFlags constructors
1918 %********************************************************************* -}
1920 type DynP = EwM (CmdLineP DynFlags)
1922 upd :: (DynFlags -> DynFlags) -> DynP ()
1923 upd f = liftEwM (do dflags <- getCmdLineState
1924 putCmdLineState $! f dflags)
1926 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1927 updM f = do dflags <- liftEwM getCmdLineState
1929 liftEwM $ putCmdLineState $! dflags'
1931 --------------- Constructor functions for OptKind -----------------
1932 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1933 noArg fn = NoArg (upd fn)
1935 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1936 noArgM fn = NoArg (updM fn)
1938 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1939 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1941 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1942 hasArg fn = HasArg (upd . fn)
1944 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1945 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1946 ; deprecate deprec })
1948 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1949 intSuffix fn = IntSuffix (\n -> upd (fn n))
1951 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1952 -> OptKind (CmdLineP DynFlags)
1953 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1955 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1956 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1958 --------------------------
1959 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1960 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1961 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1963 --------------------------
1964 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1965 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1968 deps = [ if turn_on then setExtensionFlag d
1969 else unSetExtensionFlag d
1970 | (f', turn_on, d) <- impliedFlags, f' == f ]
1971 -- When you set f, set the ones it implies
1972 -- NB: use setExtensionFlag recursively, in case the implied flags
1973 -- implies further flags
1975 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1976 -- When you un-set f, however, we don't un-set the things it implies
1977 -- (except for -fno-glasgow-exts, which is treated specially)
1979 --------------------------
1980 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
1981 alterSettings f dflags = dflags { settings = f (settings dflags) }
1983 --------------------------
1984 setDumpFlag' :: DynFlag -> DynP ()
1985 setDumpFlag' dump_flag
1986 = do { setDynFlag dump_flag
1987 ; when want_recomp forceRecompile }
1989 -- Certain dumpy-things are really interested in what's going
1990 -- on during recompilation checking, so in those cases we
1991 -- don't want to turn it off.
1992 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1993 Opt_D_dump_hi_diffs]
1995 forceRecompile :: DynP ()
1996 -- Whenver we -ddump, force recompilation (by switching off the
1997 -- recompilation checker), else you don't see the dump! However,
1998 -- don't switch it off in --make mode, else *everything* gets
1999 -- recompiled which probably isn't what you want
2000 forceRecompile = do { dfs <- liftEwM getCmdLineState
2001 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2003 force_recomp dfs = isOneShot (ghcMode dfs)
2005 setVerboseCore2Core :: DynP ()
2006 setVerboseCore2Core = do forceRecompile
2007 setDynFlag Opt_D_verbose_core2core
2008 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2011 setDumpSimplPhases :: String -> DynP ()
2012 setDumpSimplPhases s = do forceRecompile
2013 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2015 spec = case s of { ('=' : s') -> s'; _ -> s }
2017 setVerbosity :: Maybe Int -> DynP ()
2018 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2020 addCmdlineHCInclude :: String -> DynP ()
2021 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2023 extraPkgConf_ :: FilePath -> DynP ()
2024 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2026 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2028 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2030 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2032 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2034 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2036 setPackageName :: String -> DynFlags -> DynFlags
2037 setPackageName p s = s{ thisPackage = stringToPackageId p }
2039 -- If we're linking a binary, then only targets that produce object
2040 -- code are allowed (requests for other target types are ignored).
2041 setTarget :: HscTarget -> DynP ()
2042 setTarget l = upd set
2045 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2048 -- Changes the target only if we're compiling object code. This is
2049 -- used by -fasm and -fllvm, which switch from one to the other, but
2050 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2051 -- can be safely used in an OPTIONS_GHC pragma.
2052 setObjTarget :: HscTarget -> DynP ()
2053 setObjTarget l = updM set
2056 | isObjectTarget (hscTarget dflags)
2059 | cGhcUnregisterised /= "YES" ->
2060 do addWarn ("Compiler not unregisterised, so ignoring " ++
2061 showHscTargetFlag l)
2064 | cGhcWithNativeCodeGen /= "YES" ->
2065 do addWarn ("Compiler has no native codegen, so ignoring " ++
2066 showHscTargetFlag l)
2069 | cGhcUnregisterised == "YES" ->
2070 do addWarn ("Compiler unregisterised, so ignoring " ++
2071 showHscTargetFlag l)
2073 _ -> return $ dflags { hscTarget = l }
2074 | otherwise = return dflags
2076 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2077 setOptLevel n dflags
2078 | hscTarget dflags == HscInterpreted && n > 0
2079 = do addWarn "-O conflicts with --interactive; -O ignored."
2082 = return (updOptLevel n dflags)
2085 -- -Odph is equivalent to
2087 -- -O2 optimise as much as possible
2088 -- -fmax-simplifier-iterations20 this is necessary sometimes
2089 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2091 setDPHOpt :: DynFlags -> DynP DynFlags
2092 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2096 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2097 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2098 -- vectoriser cannot be used.
2100 data DPHBackend = DPHPar -- "dph-par"
2101 | DPHSeq -- "dph-seq"
2102 | DPHThis -- the currently compiled package
2103 | DPHNone -- no DPH library available
2104 deriving(Eq, Ord, Enum, Show)
2106 setDPHBackend :: DPHBackend -> DynP ()
2107 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2109 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2111 dphPackageMaybe :: DynFlags -> Maybe PackageId
2112 dphPackageMaybe dflags
2113 = case dphBackend dflags of
2114 DPHPar -> Just dphParPackageId
2115 DPHSeq -> Just dphSeqPackageId
2116 DPHThis -> Just (thisPackage dflags)
2119 setMainIs :: String -> DynP ()
2121 | not (null main_fn) && isLower (head main_fn)
2122 -- The arg looked like "Foo.Bar.baz"
2123 = upd $ \d -> d{ mainFunIs = Just main_fn,
2124 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2126 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2127 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2129 | otherwise -- The arg looked like "baz"
2130 = upd $ \d -> d{ mainFunIs = Just arg }
2132 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2134 -----------------------------------------------------------------------------
2135 -- Paths & Libraries
2137 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2139 -- -i on its own deletes the import paths
2140 addImportPath "" = upd (\s -> s{importPaths = []})
2141 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2145 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2148 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2150 addFrameworkPath p =
2151 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2153 #ifndef mingw32_TARGET_OS
2154 split_marker :: Char
2155 split_marker = ':' -- not configurable (ToDo)
2158 splitPathList :: String -> [String]
2159 splitPathList s = filter notNull (splitUp s)
2160 -- empty paths are ignored: there might be a trailing
2161 -- ':' in the initial list, for example. Empty paths can
2162 -- cause confusion when they are translated into -I options
2163 -- for passing to gcc.
2165 #ifndef mingw32_TARGET_OS
2166 splitUp xs = split split_marker xs
2168 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2170 -- That is, if "foo:bar:baz" is used, this interpreted as
2171 -- consisting of three entries, 'foo', 'bar', 'baz'.
2172 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2173 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2175 -- Notice that no attempt is made to fully replace the 'standard'
2176 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2177 -- that this will cause too much breakage for users & ':' will
2178 -- work fine even with DOS paths, if you're not insisting on being silly.
2181 splitUp (x:':':div:xs) | div `elem` dir_markers
2182 = ((x:':':div:p): splitUp rs)
2184 (p,rs) = findNextPath xs
2185 -- we used to check for existence of the path here, but that
2186 -- required the IO monad to be threaded through the command-line
2187 -- parser which is quite inconvenient. The
2188 splitUp xs = cons p (splitUp rs)
2190 (p,rs) = findNextPath xs
2195 -- will be called either when we've consumed nought or the
2196 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2197 -- finding the next split marker.
2199 case break (`elem` split_markers) xs of
2200 (p, _:ds) -> (p, ds)
2203 split_markers :: [Char]
2204 split_markers = [':', ';']
2206 dir_markers :: [Char]
2207 dir_markers = ['/', '\\']
2210 -- -----------------------------------------------------------------------------
2211 -- tmpDir, where we store temporary files.
2213 setTmpDir :: FilePath -> DynFlags -> DynFlags
2214 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2215 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2216 -- seem necessary now --SDM 7/2/2008
2218 -----------------------------------------------------------------------------
2221 setRtsOpts :: String -> DynP ()
2222 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2224 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2225 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2227 -----------------------------------------------------------------------------
2230 setOptHpcDir :: String -> DynP ()
2231 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2233 -----------------------------------------------------------------------------
2234 -- Via-C compilation stuff
2236 -- There are some options that we need to pass to gcc when compiling
2237 -- Haskell code via C, but are only supported by recent versions of
2238 -- gcc. The configure script decides which of these options we need,
2239 -- and puts them in the "settings" file in $topdir. The advantage of
2240 -- having these in a separate file is that the file can be created at
2241 -- install-time depending on the available gcc version, and even
2242 -- re-generated later if gcc is upgraded.
2244 -- The options below are not dependent on the version of gcc, only the
2247 picCCOpts :: DynFlags -> [String]
2249 #if darwin_TARGET_OS
2250 -- Apple prefers to do things the other way round.
2251 -- PIC is on by default.
2252 -- -mdynamic-no-pic:
2253 -- Turn off PIC code generation.
2255 -- Don't generate "common" symbols - these are unwanted
2256 -- in dynamic libraries.
2259 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2261 = ["-mdynamic-no-pic"]
2262 #elif mingw32_TARGET_OS
2263 -- no -fPIC for Windows
2265 = ["-U __PIC__","-D__PIC__"]
2269 -- we need -fPIC for C files when we are compiling with -dynamic,
2270 -- otherwise things like stub.c files don't get compiled
2271 -- correctly. They need to reference data in the Haskell
2272 -- objects, but can't without -fPIC. See
2273 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2274 | opt_PIC || not opt_Static
2275 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2280 -- -----------------------------------------------------------------------------
2284 can_split = cSupportsSplitObjs == "YES"
2286 -- -----------------------------------------------------------------------------
2289 compilerInfo :: DynFlags -> [(String, String)]
2291 = -- We always make "Project name" be first to keep parsing in
2292 -- other languages simple, i.e. when looking for other fields,
2293 -- you don't have to worry whether there is a leading '[' or not
2294 ("Project name", cProjectName)
2295 -- Next come the settings, so anything else can be overridden
2296 -- in the settings file (as "lookup" uses the first match for the
2298 : rawSettings dflags
2299 ++ [("Project version", cProjectVersion),
2300 ("Booter version", cBooterVersion),
2302 ("Build platform", cBuildPlatformString),
2303 ("Host platform", cHostPlatformString),
2304 ("Target platform", cTargetPlatformString),
2305 ("Have interpreter", cGhcWithInterpreter),
2306 ("Object splitting supported", cSupportsSplitObjs),
2307 ("Have native code generator", cGhcWithNativeCodeGen),
2308 ("Support SMP", cGhcWithSMP),
2309 ("Unregisterised", cGhcUnregisterised),
2310 ("Tables next to code", cGhcEnableTablesNextToCode),
2311 ("RTS ways", cGhcRTSWays),
2312 ("Leading underscore", cLeadingUnderscore),
2313 ("Debug on", show debugIsOn),
2314 ("LibDir", topDir dflags),
2315 ("Global Package DB", systemPackageConfig dflags),
2316 ("Gcc Linker flags", show cGccLinkerOpts),
2317 ("Ld Linker flags", show cLdLinkerOpts)