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_MonadComprehensions
362 | Opt_GeneralizedNewtypeDeriving
365 | Opt_PostfixOperators
368 | Opt_LiberalTypeSynonyms
371 | Opt_ImpredicativeTypes
375 | Opt_AlternativeLayoutRule
376 | Opt_AlternativeLayoutRuleTransitional
377 | Opt_DatatypeContexts
378 | Opt_NondecreasingIndentation
382 -- | Contains not only a collection of 'DynFlag's but also a plethora of
383 -- information relating to the compilation of a single file or GHC session
384 data DynFlags = DynFlags {
387 hscTarget :: HscTarget,
388 hscOutName :: String, -- ^ Name of the output file
389 extCoreName :: String, -- ^ Name of the .hcr output file
390 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
391 optLevel :: Int, -- ^ Optimisation level
392 simplPhases :: Int, -- ^ Number of simplifier phases
393 maxSimplIterations :: Int, -- ^ Max simplifier iterations
394 shouldDumpSimplPhase :: Maybe String,
395 ruleCheck :: Maybe String,
396 strictnessBefore :: [Int], -- ^ Additional demand analysis
398 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
399 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
400 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
401 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
402 -- See CoreMonad.FloatOutSwitches
404 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
405 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
406 importPaths :: [FilePath],
408 mainFunIs :: Maybe String,
409 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
411 dphBackend :: DPHBackend,
413 thisPackage :: PackageId, -- ^ name of package currently being compiled
416 ways :: [Way], -- ^ Way flags from the command line
417 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
418 rtsBuildTag :: String, -- ^ The RTS \"way\"
420 -- For object splitting
421 splitInfo :: Maybe (String,Int),
424 objectDir :: Maybe String,
425 dylibInstallName :: Maybe String,
426 hiDir :: Maybe String,
427 stubDir :: Maybe String,
433 outputFile :: Maybe String,
434 outputHi :: Maybe String,
435 dynLibLoader :: DynLibLoader,
437 -- | This is set by 'DriverPipeline.runPipeline' based on where
438 -- its output is going.
439 dumpPrefix :: Maybe FilePath,
441 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
442 -- Set by @-ddump-file-prefix@
443 dumpPrefixForce :: Maybe FilePath,
445 includePaths :: [String],
446 libraryPaths :: [String],
447 frameworkPaths :: [String], -- used on darwin only
448 cmdlineFrameworks :: [String], -- ditto
450 rtsOpts :: Maybe String,
451 rtsOptsEnabled :: RtsOptsEnabled,
453 hpcDir :: String, -- ^ Path to store the .mix files
455 settings :: Settings,
458 depMakefile :: FilePath,
459 depIncludePkgDeps :: Bool,
460 depExcludeMods :: [ModuleName],
461 depSuffixes :: [String],
464 extraPkgConfs :: [FilePath],
465 -- ^ The @-package-conf@ flags given on the command line, in the order
468 packageFlags :: [PackageFlag],
469 -- ^ The @-package@ and @-hide-package@ flags from the command-line
472 -- NB. do not modify this field, it is calculated by
473 -- Packages.initPackages and Packages.updatePackages.
474 pkgDatabase :: Maybe [PackageConfig],
475 pkgState :: PackageState,
478 -- These have to be IORefs, because the defaultCleanupHandler needs to
479 -- know what to clean when an exception happens
480 filesToClean :: IORef [FilePath],
481 dirsToClean :: IORef (Map FilePath FilePath),
485 -- Don't change this without updating extensionFlags:
486 language :: Maybe Language,
487 -- Don't change this without updating extensionFlags:
488 extensions :: [OnOff ExtensionFlag],
489 -- extensionFlags should always be equal to
490 -- flattenExtensionFlags language extensions
491 extensionFlags :: [ExtensionFlag],
493 -- | Message output action: use "ErrUtils" instead of this if you can
494 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
496 haddockOptions :: Maybe String
499 data Settings = Settings {
500 sGhcUsagePath :: FilePath, -- Filled in by SysTools
501 sGhciUsagePath :: FilePath, -- ditto
503 sTmpDir :: String, -- no trailing '/'
504 -- You shouldn't need to look things up in rawSettings directly.
505 -- They should have their own fields instead.
506 sRawSettings :: [(String, String)],
507 sExtraGccViaCFlags :: [String],
508 sSystemPackageConfig :: FilePath,
509 -- commands for particular phases
511 sPgm_P :: (String,[Option]),
513 sPgm_c :: (String,[Option]),
514 sPgm_s :: (String,[Option]),
515 sPgm_a :: (String,[Option]),
516 sPgm_l :: (String,[Option]),
517 sPgm_dll :: (String,[Option]),
519 sPgm_sysman :: String,
520 sPgm_windres :: String,
521 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
522 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
523 -- options for particular phases
531 sOpt_windres :: [String],
532 sOpt_lo :: [String], -- LLVM: llvm optimiser
533 sOpt_lc :: [String] -- LLVM: llc static compiler
537 ghcUsagePath :: DynFlags -> FilePath
538 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
539 ghciUsagePath :: DynFlags -> FilePath
540 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
541 topDir :: DynFlags -> FilePath
542 topDir dflags = sTopDir (settings dflags)
543 tmpDir :: DynFlags -> String
544 tmpDir dflags = sTmpDir (settings dflags)
545 rawSettings :: DynFlags -> [(String, String)]
546 rawSettings dflags = sRawSettings (settings dflags)
547 extraGccViaCFlags :: DynFlags -> [String]
548 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
549 systemPackageConfig :: DynFlags -> FilePath
550 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
551 pgm_L :: DynFlags -> String
552 pgm_L dflags = sPgm_L (settings dflags)
553 pgm_P :: DynFlags -> (String,[Option])
554 pgm_P dflags = sPgm_P (settings dflags)
555 pgm_F :: DynFlags -> String
556 pgm_F dflags = sPgm_F (settings dflags)
557 pgm_c :: DynFlags -> (String,[Option])
558 pgm_c dflags = sPgm_c (settings dflags)
559 pgm_s :: DynFlags -> (String,[Option])
560 pgm_s dflags = sPgm_s (settings dflags)
561 pgm_a :: DynFlags -> (String,[Option])
562 pgm_a dflags = sPgm_a (settings dflags)
563 pgm_l :: DynFlags -> (String,[Option])
564 pgm_l dflags = sPgm_l (settings dflags)
565 pgm_dll :: DynFlags -> (String,[Option])
566 pgm_dll dflags = sPgm_dll (settings dflags)
567 pgm_T :: DynFlags -> String
568 pgm_T dflags = sPgm_T (settings dflags)
569 pgm_sysman :: DynFlags -> String
570 pgm_sysman dflags = sPgm_sysman (settings dflags)
571 pgm_windres :: DynFlags -> String
572 pgm_windres dflags = sPgm_windres (settings dflags)
573 pgm_lo :: DynFlags -> (String,[Option])
574 pgm_lo dflags = sPgm_lo (settings dflags)
575 pgm_lc :: DynFlags -> (String,[Option])
576 pgm_lc dflags = sPgm_lc (settings dflags)
577 opt_L :: DynFlags -> [String]
578 opt_L dflags = sOpt_L (settings dflags)
579 opt_P :: DynFlags -> [String]
580 opt_P dflags = sOpt_P (settings dflags)
581 opt_F :: DynFlags -> [String]
582 opt_F dflags = sOpt_F (settings dflags)
583 opt_c :: DynFlags -> [String]
584 opt_c dflags = sOpt_c (settings dflags)
585 opt_m :: DynFlags -> [String]
586 opt_m dflags = sOpt_m (settings dflags)
587 opt_a :: DynFlags -> [String]
588 opt_a dflags = sOpt_a (settings dflags)
589 opt_l :: DynFlags -> [String]
590 opt_l dflags = sOpt_l (settings dflags)
591 opt_windres :: DynFlags -> [String]
592 opt_windres dflags = sOpt_windres (settings dflags)
593 opt_lo :: DynFlags -> [String]
594 opt_lo dflags = sOpt_lo (settings dflags)
595 opt_lc :: DynFlags -> [String]
596 opt_lc dflags = sOpt_lc (settings dflags)
598 wayNames :: DynFlags -> [WayName]
599 wayNames = map wayName . ways
601 -- | The target code type of the compilation (if any).
603 -- Whenever you change the target, also make sure to set 'ghcLink' to
604 -- something sensible.
606 -- 'HscNothing' can be used to avoid generating any output, however, note
609 -- * This will not run the desugaring step, thus no warnings generated in
610 -- this step will be output. In particular, this includes warnings related
611 -- to pattern matching. You can run the desugarer manually using
612 -- 'GHC.desugarModule'.
614 -- * If a program uses Template Haskell the typechecker may try to run code
615 -- from an imported module. This will fail if no code has been generated
616 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
617 -- whether this might be the case and choose to either switch to a
618 -- different target or avoid typechecking such modules. (The latter may
619 -- preferable for security reasons.)
622 = HscC -- ^ Generate C code.
623 | HscAsm -- ^ Generate assembly using the native code generator.
624 | HscLlvm -- ^ Generate assembly using the llvm code generator.
625 | HscJava -- ^ Generate Java bytecode.
626 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
627 | HscNothing -- ^ Don't generate any code. See notes above.
630 showHscTargetFlag :: HscTarget -> String
631 showHscTargetFlag HscC = "-fvia-c"
632 showHscTargetFlag HscAsm = "-fasm"
633 showHscTargetFlag HscLlvm = "-fllvm"
634 showHscTargetFlag HscJava = panic "No flag for HscJava"
635 showHscTargetFlag HscInterpreted = "-fbyte-code"
636 showHscTargetFlag HscNothing = "-fno-code"
638 -- | Will this target result in an object file on the disk?
639 isObjectTarget :: HscTarget -> Bool
640 isObjectTarget HscC = True
641 isObjectTarget HscAsm = True
642 isObjectTarget HscLlvm = True
643 isObjectTarget _ = False
645 -- | The 'GhcMode' tells us whether we're doing multi-module
646 -- compilation (controlled via the "GHC" API) or one-shot
647 -- (single-module) compilation. This makes a difference primarily to
648 -- the "Finder": in one-shot mode we look for interface files for
649 -- imported modules, but in multi-module mode we look for source files
650 -- in order to check whether they need to be recompiled.
652 = CompManager -- ^ @\-\-make@, GHCi, etc.
653 | OneShot -- ^ @ghc -c Foo.hs@
654 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
657 instance Outputable GhcMode where
658 ppr CompManager = ptext (sLit "CompManager")
659 ppr OneShot = ptext (sLit "OneShot")
660 ppr MkDepend = ptext (sLit "MkDepend")
662 isOneShot :: GhcMode -> Bool
663 isOneShot OneShot = True
664 isOneShot _other = False
666 -- | What to do in the link step, if there is one.
668 = NoLink -- ^ Don't link at all
669 | LinkBinary -- ^ Link object code into a binary
670 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
671 -- bytecode and object code).
672 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
675 isNoLink :: GhcLink -> Bool
676 isNoLink NoLink = True
679 -- Is it worth evaluating this Bool and caching it in the DynFlags value
680 -- during initDynFlags?
681 doingTickyProfiling :: DynFlags -> Bool
682 doingTickyProfiling _ = opt_Ticky
683 -- XXX -ticky is a static flag, because it implies -debug which is also
684 -- static. If the way flags were made dynamic, we could fix this.
687 = ExposePackage String
688 | ExposePackageId String
690 | IgnorePackage String
693 defaultHscTarget :: HscTarget
694 defaultHscTarget = defaultObjectTarget
696 -- | The 'HscTarget' value corresponding to the default way to create
697 -- object files on the current platform.
698 defaultObjectTarget :: HscTarget
700 | cGhcUnregisterised == "YES" = HscC
701 | cGhcWithNativeCodeGen == "YES" = HscAsm
702 | otherwise = HscLlvm
709 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
712 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
713 initDynFlags :: DynFlags -> IO DynFlags
714 initDynFlags dflags = do
715 -- someday these will be dynamic flags
716 ways <- readIORef v_Ways
717 refFilesToClean <- newIORef []
718 refDirsToClean <- newIORef Map.empty
721 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
722 rtsBuildTag = mkBuildTag ways,
723 filesToClean = refFilesToClean,
724 dirsToClean = refDirsToClean
727 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
728 -- and must be fully initialized by 'GHC.newSession' first.
729 defaultDynFlags :: Settings -> DynFlags
730 defaultDynFlags mySettings =
732 ghcMode = CompManager,
733 ghcLink = LinkBinary,
734 hscTarget = defaultHscTarget,
740 maxSimplIterations = 4,
741 shouldDumpSimplPhase = Nothing,
743 specConstrThreshold = Just 200,
744 specConstrCount = Just 3,
745 liberateCaseThreshold = Just 200,
746 floatLamArgs = Just 0, -- Default: float only if no fvs
747 strictnessBefore = [],
749 targetPlatform = defaultTargetPlatform,
750 cmdlineHcIncludes = [],
754 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
756 dphBackend = DPHNone,
758 thisPackage = mainPackageId,
761 dylibInstallName = Nothing,
765 objectSuf = phaseInputExt StopLn,
766 hcSuf = phaseInputExt HCc,
769 outputFile = Nothing,
771 dynLibLoader = SystemDependent,
772 dumpPrefix = Nothing,
773 dumpPrefixForce = Nothing,
777 cmdlineFrameworks = [],
779 rtsOptsEnabled = RtsOptsSafeOnly,
785 pkgDatabase = Nothing,
786 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
787 ways = panic "defaultDynFlags: No ways",
788 buildTag = panic "defaultDynFlags: No buildTag",
789 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
791 settings = mySettings,
793 depMakefile = "Makefile",
794 depIncludePkgDeps = False,
797 -- end of ghc -M values
798 filesToClean = panic "defaultDynFlags: No filesToClean",
799 dirsToClean = panic "defaultDynFlags: No dirsToClean",
800 haddockOptions = Nothing,
801 flags = defaultFlags,
804 extensionFlags = flattenExtensionFlags Nothing [],
806 log_action = \severity srcSpan style msg ->
808 SevOutput -> printOutput (msg style)
809 SevInfo -> printErrs (msg style)
810 SevFatal -> printErrs (msg style)
813 printErrs ((mkLocMessage srcSpan msg) style)
814 -- careful (#2302): printErrs prints in UTF-8, whereas
815 -- converting to string first and using hPutStr would
816 -- just emit the low 8 bits of each unicode char.
820 Note [Verbosity levels]
821 ~~~~~~~~~~~~~~~~~~~~~~~
822 0 | print errors & warnings only
823 1 | minimal verbosity: print "compiling M ... done." for each module.
824 2 | equivalent to -dshow-passes
825 3 | equivalent to existing "ghc -v"
826 4 | "ghc -v -ddump-most"
827 5 | "ghc -v -ddump-all"
833 -- OnOffs accumulate in reverse order, so we use foldr in order to
834 -- process them in the right order
835 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
837 flattenExtensionFlags ml = foldr f defaultExtensionFlags
838 where f (On f) flags = f : delete f flags
839 f (Off f) flags = delete f flags
840 defaultExtensionFlags = languageExtensions ml
842 languageExtensions :: Maybe Language -> [ExtensionFlag]
844 languageExtensions Nothing
845 -- Nothing => the default case
846 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
847 -- behaviour the default, to see if anyone notices
849 -- In due course I'd like Opt_MonoLocalBinds to be on by default
850 -- But NB it's implied by GADTs etc
851 -- SLPJ September 2010
852 : Opt_NondecreasingIndentation -- This has been on by default for some time
853 : languageExtensions (Just Haskell2010)
855 languageExtensions (Just Haskell98)
856 = [Opt_ImplicitPrelude,
857 Opt_MonomorphismRestriction,
859 Opt_DatatypeContexts,
860 Opt_NondecreasingIndentation
861 -- strictly speaking non-standard, but we always had this
862 -- on implicitly before the option was added in 7.1, and
863 -- turning it off breaks code, so we're keeping it on for
864 -- backwards compatibility. Cabal uses -XHaskell98 by
865 -- default unless you specify another language.
868 languageExtensions (Just Haskell2010)
869 = [Opt_ImplicitPrelude,
870 Opt_MonomorphismRestriction,
871 Opt_DatatypeContexts,
873 Opt_ForeignFunctionInterface,
878 -- | Test whether a 'DynFlag' is set
879 dopt :: DynFlag -> DynFlags -> Bool
880 dopt f dflags = f `elem` (flags dflags)
883 dopt_set :: DynFlags -> DynFlag -> DynFlags
884 dopt_set dfs f = dfs{ flags = f : flags dfs }
886 -- | Unset a 'DynFlag'
887 dopt_unset :: DynFlags -> DynFlag -> DynFlags
888 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
890 -- | Test whether a 'ExtensionFlag' is set
891 xopt :: ExtensionFlag -> DynFlags -> Bool
892 xopt f dflags = f `elem` extensionFlags dflags
894 -- | Set a 'ExtensionFlag'
895 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
897 = let onoffs = On f : extensions dfs
898 in dfs { extensions = onoffs,
899 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
901 -- | Unset a 'ExtensionFlag'
902 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
904 = let onoffs = Off f : extensions dfs
905 in dfs { extensions = onoffs,
906 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
908 setLanguage :: Language -> DynP ()
909 setLanguage l = upd f
910 where f dfs = let mLang = Just l
911 oneoffs = extensions dfs
914 extensionFlags = flattenExtensionFlags mLang oneoffs
917 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
918 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
919 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
920 -> [a] -- ^ Correctly ordered extracted options
921 getOpts dflags opts = reverse (opts dflags)
922 -- We add to the options from the front, so we need to reverse the list
924 -- | Gets the verbosity flag for the current verbosity level. This is fed to
925 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
926 getVerbFlags :: DynFlags -> [String]
928 | verbosity dflags >= 4 = ["-v"]
931 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
932 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
933 setPgmP, addOptl, addOptP,
934 addCmdlineFramework, addHaddockOpts
935 :: String -> DynFlags -> DynFlags
936 setOutputFile, setOutputHi, setDumpPrefixForce
937 :: Maybe String -> DynFlags -> DynFlags
939 setObjectDir f d = d{ objectDir = Just f}
940 setHiDir f d = d{ hiDir = Just f}
941 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
942 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
943 -- \#included from the .hc file when compiling via C (i.e. unregisterised
945 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
946 setDylibInstallName f d = d{ dylibInstallName = Just f}
948 setObjectSuf f d = d{ objectSuf = f}
949 setHiSuf f d = d{ hiSuf = f}
950 setHcSuf f d = d{ hcSuf = f}
952 setOutputFile f d = d{ outputFile = f}
953 setOutputHi f d = d{ outputHi = f}
955 parseDynLibLoaderMode f d =
957 ("deploy", "") -> d{ dynLibLoader = Deployable }
958 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
959 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
961 setDumpPrefixForce f d = d { dumpPrefixForce = f}
963 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
964 -- Config.hs should really use Option.
965 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
966 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
967 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
970 setDepMakefile :: FilePath -> DynFlags -> DynFlags
971 setDepMakefile f d = d { depMakefile = deOptDep f }
973 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
974 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
976 addDepExcludeMod :: String -> DynFlags -> DynFlags
978 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
980 addDepSuffix :: FilePath -> DynFlags -> DynFlags
981 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
984 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
985 -- we need to strip the "-optdep" off of the arg
986 deOptDep :: String -> String
987 deOptDep x = case stripPrefix "-optdep" x of
991 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
993 addHaddockOpts f d = d{ haddockOptions = Just f}
995 -- -----------------------------------------------------------------------------
996 -- Command-line options
998 -- | When invoking external tools as part of the compilation pipeline, we
999 -- pass these a sequence of options on the command-line. Rather than
1000 -- just using a list of Strings, we use a type that allows us to distinguish
1001 -- between filepaths and 'other stuff'. The reason for this is that
1002 -- this type gives us a handle on transforming filenames, and filenames only,
1003 -- to whatever format they're expected to be on a particular platform.
1005 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1006 String -- a non-filepath prefix that shouldn't be
1007 -- transformed (e.g., "/out=")
1008 String -- the filepath/filename portion
1011 showOpt :: Option -> String
1012 showOpt (FileOption pre f) = pre ++ f
1013 showOpt (Option s) = s
1015 -----------------------------------------------------------------------------
1016 -- Setting the optimisation level
1018 updOptLevel :: Int -> DynFlags -> DynFlags
1019 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1021 = dfs2{ optLevel = final_n }
1023 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1024 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1025 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1027 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1028 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1030 -- -----------------------------------------------------------------------------
1031 -- StgToDo: abstraction of stg-to-stg passes to run.
1034 = StgDoMassageForProfiling -- should be (next to) last
1035 -- There's also setStgVarInfo, but its absolute "lastness"
1036 -- is so critical that it is hardwired in (no flag).
1039 getStgToDo :: DynFlags -> [StgToDo]
1043 stg_stats = dopt Opt_StgStats dflags
1045 todo1 = if stg_stats then [D_stg_stats] else []
1047 todo2 | WayProf `elem` wayNames dflags
1048 = StgDoMassageForProfiling : todo1
1052 {- **********************************************************************
1056 %********************************************************************* -}
1058 -- -----------------------------------------------------------------------------
1059 -- Parsing the dynamic flags.
1061 -- | Parse dynamic flags from a list of command line arguments. Returns the
1062 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1063 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1064 -- flags or missing arguments).
1065 parseDynamicFlags :: Monad m =>
1066 DynFlags -> [Located String]
1067 -> m (DynFlags, [Located String], [Located String])
1068 -- ^ Updated 'DynFlags', left-over arguments, and
1069 -- list of warnings.
1070 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1072 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1073 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1074 parseDynamicNoPackageFlags :: Monad m =>
1075 DynFlags -> [Located String]
1076 -> m (DynFlags, [Located String], [Located String])
1077 -- ^ Updated 'DynFlags', left-over arguments, and
1078 -- list of warnings.
1079 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1081 parseDynamicFlags_ :: Monad m =>
1082 DynFlags -> [Located String] -> Bool
1083 -> m (DynFlags, [Located String], [Located String])
1084 parseDynamicFlags_ dflags0 args pkg_flags = do
1085 -- XXX Legacy support code
1086 -- We used to accept things like
1087 -- optdep-f -optdepdepend
1088 -- optdep-f -optdep depend
1089 -- optdep -f -optdepdepend
1090 -- optdep -f -optdep depend
1091 -- but the spaces trip up proper argument handling. So get rid of them.
1092 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1093 f (x : xs) = x : f xs
1097 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1098 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1099 | otherwise = dynamic_flags
1101 let ((leftover, errs, warns), dflags1)
1102 = runCmdLine (processArgs flag_spec args') dflags0
1103 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1105 let (pic_warns, dflags2)
1106 | not (cTargetArch == X86_64 && (cTargetOS == Linux || cTargetOS == OSX)) &&
1107 (not opt_Static || opt_PIC) &&
1108 hscTarget dflags1 == HscLlvm
1109 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and "
1110 ++ "-dynamic on this platform;\n"
1112 ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
1113 dflags1{ hscTarget = defaultObjectTarget })
1114 | otherwise = ([], dflags1)
1116 return (dflags2, leftover, pic_warns ++ warns)
1119 {- **********************************************************************
1121 DynFlags specifications
1123 %********************************************************************* -}
1125 allFlags :: [String]
1126 allFlags = map ('-':) $
1127 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1128 map ("fno-"++) flags ++
1129 map ("f"++) flags ++
1130 map ("f"++) flags' ++
1131 map ("X"++) supportedExtensions
1132 where ok (PrefixPred _ _) = False
1134 flags = [ name | (name, _, _) <- fFlags ]
1135 flags' = [ name | (name, _, _) <- fLangFlags ]
1137 --------------- The main flags themselves ------------------
1138 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1140 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1141 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1142 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1144 (HasArg (\s -> do { addCmdlineHCInclude s
1145 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1146 , Flag "v" (OptIntSuffix setVerbosity)
1148 ------- Specific phases --------------------------------------------
1149 -- need to appear before -pgmL to be parsed as LLVM flags.
1150 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1151 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1152 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1153 , Flag "pgmP" (hasArg setPgmP)
1154 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1155 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1156 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1157 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1158 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1159 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1160 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1161 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1163 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1164 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1165 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1166 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1167 , Flag "optP" (hasArg addOptP)
1168 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1169 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1170 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1171 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1172 , Flag "optl" (hasArg addOptl)
1173 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1176 (NoArg (if can_split
1177 then setDynFlag Opt_SplitObjs
1178 else addWarn "ignoring -fsplit-objs"))
1180 -------- ghc -M -----------------------------------------------------
1181 , Flag "dep-suffix" (hasArg addDepSuffix)
1182 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1183 , Flag "dep-makefile" (hasArg setDepMakefile)
1184 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1185 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1186 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1187 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1188 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1189 , Flag "exclude-module" (hasArg addDepExcludeMod)
1190 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1191 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1193 -------- Linking ----------------------------------------------------
1194 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1195 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1196 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1197 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1199 ------- Libraries ---------------------------------------------------
1200 , Flag "L" (Prefix addLibraryPath)
1201 , Flag "l" (AnySuffix (upd . addOptl))
1203 ------- Frameworks --------------------------------------------------
1204 -- -framework-path should really be -F ...
1205 , Flag "framework-path" (HasArg addFrameworkPath)
1206 , Flag "framework" (hasArg addCmdlineFramework)
1208 ------- Output Redirection ------------------------------------------
1209 , Flag "odir" (hasArg setObjectDir)
1210 , Flag "o" (SepArg (upd . setOutputFile . Just))
1211 , Flag "ohi" (hasArg (setOutputHi . Just ))
1212 , Flag "osuf" (hasArg setObjectSuf)
1213 , Flag "hcsuf" (hasArg setHcSuf)
1214 , Flag "hisuf" (hasArg setHiSuf)
1215 , Flag "hidir" (hasArg setHiDir)
1216 , Flag "tmpdir" (hasArg setTmpDir)
1217 , Flag "stubdir" (hasArg setStubDir)
1218 , Flag "outputdir" (hasArg setOutputDir)
1219 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1221 ------- Keeping temporary files -------------------------------------
1222 -- These can be singular (think ghc -c) or plural (think ghc --make)
1223 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1224 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1225 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1226 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1227 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1228 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1229 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1230 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1231 -- This only makes sense as plural
1232 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1234 ------- Miscellaneous ----------------------------------------------
1235 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1236 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1237 , Flag "with-rtsopts" (HasArg setRtsOpts)
1238 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1239 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1240 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1241 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1242 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1243 , Flag "main-is" (SepArg setMainIs)
1244 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1245 , Flag "haddock-opts" (hasArg addHaddockOpts)
1246 , Flag "hpcdir" (SepArg setOptHpcDir)
1248 ------- recompilation checker --------------------------------------
1249 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1250 ; deprecate "Use -fno-force-recomp instead" }))
1251 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1252 ; deprecate "Use -fforce-recomp instead" }))
1254 ------ HsCpp opts ---------------------------------------------------
1255 , Flag "D" (AnySuffix (upd . addOptP))
1256 , Flag "U" (AnySuffix (upd . addOptP))
1258 ------- Include/Import Paths ----------------------------------------
1259 , Flag "I" (Prefix addIncludePath)
1260 , Flag "i" (OptPrefix addImportPath)
1262 ------ Debugging ----------------------------------------------------
1263 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1265 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1266 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1267 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1268 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1269 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1270 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1271 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1272 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1273 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1274 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1275 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1276 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1277 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1278 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1279 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1280 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1281 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1282 ; setDumpFlag' Opt_D_dump_llvm}))
1283 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1284 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1285 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1286 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1287 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1288 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1289 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1290 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1291 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1292 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1293 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1294 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1295 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1296 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1297 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1298 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1299 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1300 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1301 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1302 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1303 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1304 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1305 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1306 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1307 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1308 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1309 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1310 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1311 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1312 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1313 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1314 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1315 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1316 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1317 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1318 ; setVerboseCore2Core }))
1319 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1320 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1321 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1322 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1323 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1324 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1325 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1326 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1327 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1328 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1329 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1330 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1331 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1332 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1333 , Flag "dshow-passes" (NoArg (do forceRecompile
1334 setVerbosity (Just 2)))
1335 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1337 ------ Machine dependant (-m<blah>) stuff ---------------------------
1339 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1340 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1341 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1342 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1344 ------ Warning opts -------------------------------------------------
1345 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1346 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1347 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1348 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1349 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1350 ; deprecate "Use -w instead" }))
1351 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1353 ------ Optimisation flags ------------------------------------------
1354 , Flag "O" (noArgM (setOptLevel 1))
1355 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1356 setOptLevel 0 dflags))
1357 , Flag "Odph" (noArgM setDPHOpt)
1358 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1359 -- If the number is missing, use 1
1361 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1362 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1363 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1364 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1365 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1366 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1367 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1368 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1369 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1370 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1371 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1372 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1373 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1375 ------ Profiling ----------------------------------------------------
1377 -- XXX Should the -f* flags be deprecated?
1378 -- They don't seem to be documented
1379 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1380 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1381 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1382 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1383 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1384 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1385 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1386 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1387 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1389 ------ DPH flags ----------------------------------------------------
1391 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1392 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1393 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1394 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1396 ------ Compiler flags -----------------------------------------------
1398 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1399 , Flag "fvia-c" (NoArg
1400 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1401 , Flag "fvia-C" (NoArg
1402 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1403 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1405 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1406 setTarget HscNothing))
1407 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1408 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1409 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1410 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1412 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1413 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1414 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1415 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1416 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1417 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1418 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1420 package_flags :: [Flag (CmdLineP DynFlags)]
1422 ------- Packages ----------------------------------------------------
1423 Flag "package-conf" (HasArg extraPkgConf_)
1424 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1425 , Flag "package-name" (hasArg setPackageName)
1426 , Flag "package-id" (HasArg exposePackageId)
1427 , Flag "package" (HasArg exposePackage)
1428 , Flag "hide-package" (HasArg hidePackage)
1429 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1430 , Flag "ignore-package" (HasArg ignorePackage)
1431 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1432 ; deprecate "Use -package instead" }))
1435 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1436 -- False <=> we are turning the flag off
1437 turnOn :: TurnOnFlag; turnOn = True
1438 turnOff :: TurnOnFlag; turnOff = False
1441 = ( String -- Flag in string form
1442 , flag -- Flag in internal form
1443 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1444 -- Typically, emit a warning or error
1446 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1447 -> String -- ^ The flag prefix
1448 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1449 -> FlagSpec flag -- ^ Specification of this particular flag
1450 -> Flag (CmdLineP DynFlags)
1451 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1452 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1454 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1455 deprecatedForExtension lang turn_on
1456 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1458 flag | turn_on = lang
1459 | otherwise = "No"++lang
1461 useInstead :: String -> TurnOnFlag -> DynP ()
1462 useInstead flag turn_on
1463 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1465 no = if turn_on then "" else "no-"
1467 nop :: TurnOnFlag -> DynP ()
1470 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1471 fFlags :: [FlagSpec DynFlag]
1473 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1474 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1475 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1476 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1477 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1478 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1479 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1480 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1481 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1482 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1483 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1484 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1485 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1486 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1487 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1488 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1489 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1490 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1491 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1492 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1493 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1494 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1495 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1496 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1497 ( "warn-orphans", Opt_WarnOrphans, nop ),
1498 ( "warn-identities", Opt_WarnIdentities, nop ),
1499 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1500 ( "warn-tabs", Opt_WarnTabs, nop ),
1501 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1502 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1503 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1504 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1505 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1506 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1507 ( "strictness", Opt_Strictness, nop ),
1508 ( "specialise", Opt_Specialise, nop ),
1509 ( "float-in", Opt_FloatIn, nop ),
1510 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1511 ( "full-laziness", Opt_FullLaziness, nop ),
1512 ( "liberate-case", Opt_LiberateCase, nop ),
1513 ( "spec-constr", Opt_SpecConstr, nop ),
1514 ( "cse", Opt_CSE, nop ),
1515 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1516 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1517 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1518 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1519 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1520 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1521 ( "case-merge", Opt_CaseMerge, nop ),
1522 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1523 ( "method-sharing", Opt_MethodSharing,
1524 \_ -> deprecate "doesn't do anything any more"),
1525 -- Remove altogether in GHC 7.2
1526 ( "dicts-cheap", Opt_DictsCheap, nop ),
1527 ( "excess-precision", Opt_ExcessPrecision, nop ),
1528 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1529 ( "print-bind-result", Opt_PrintBindResult, nop ),
1530 ( "force-recomp", Opt_ForceRecomp, nop ),
1531 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1532 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1533 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1534 ( "break-on-exception", Opt_BreakOnException, nop ),
1535 ( "break-on-error", Opt_BreakOnError, nop ),
1536 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1537 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1538 ( "run-cps", Opt_RunCPS, nop ),
1539 ( "run-cpsz", Opt_RunCPSZ, nop ),
1540 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1541 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1542 ( "vectorise", Opt_Vectorise, nop ),
1543 ( "regs-graph", Opt_RegsGraph, nop ),
1544 ( "regs-iterative", Opt_RegsIterative, nop ),
1545 ( "gen-manifest", Opt_GenManifest, nop ),
1546 ( "embed-manifest", Opt_EmbedManifest, nop ),
1547 ( "ext-core", Opt_EmitExternalCore, nop ),
1548 ( "shared-implib", Opt_SharedImplib, nop ),
1549 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1550 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1551 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1552 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1555 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1556 fLangFlags :: [FlagSpec ExtensionFlag]
1558 ( "th", Opt_TemplateHaskell,
1559 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1560 ( "fi", Opt_ForeignFunctionInterface,
1561 deprecatedForExtension "ForeignFunctionInterface" ),
1562 ( "ffi", Opt_ForeignFunctionInterface,
1563 deprecatedForExtension "ForeignFunctionInterface" ),
1564 ( "arrows", Opt_Arrows,
1565 deprecatedForExtension "Arrows" ),
1566 ( "generics", Opt_Generics,
1567 deprecatedForExtension "Generics" ),
1568 ( "implicit-prelude", Opt_ImplicitPrelude,
1569 deprecatedForExtension "ImplicitPrelude" ),
1570 ( "bang-patterns", Opt_BangPatterns,
1571 deprecatedForExtension "BangPatterns" ),
1572 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1573 deprecatedForExtension "MonomorphismRestriction" ),
1574 ( "mono-pat-binds", Opt_MonoPatBinds,
1575 deprecatedForExtension "MonoPatBinds" ),
1576 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1577 deprecatedForExtension "ExtendedDefaultRules" ),
1578 ( "implicit-params", Opt_ImplicitParams,
1579 deprecatedForExtension "ImplicitParams" ),
1580 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1581 deprecatedForExtension "ScopedTypeVariables" ),
1582 ( "parr", Opt_ParallelArrays,
1583 deprecatedForExtension "ParallelArrays" ),
1584 ( "PArr", Opt_ParallelArrays,
1585 deprecatedForExtension "ParallelArrays" ),
1586 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1587 deprecatedForExtension "OverlappingInstances" ),
1588 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1589 deprecatedForExtension "UndecidableInstances" ),
1590 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1591 deprecatedForExtension "IncoherentInstances" )
1594 supportedLanguages :: [String]
1595 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1597 supportedExtensions :: [String]
1598 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1600 supportedLanguagesAndExtensions :: [String]
1601 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1603 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1604 languageFlags :: [FlagSpec Language]
1606 ( "Haskell98", Haskell98, nop ),
1607 ( "Haskell2010", Haskell2010, nop )
1610 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1611 xFlags :: [FlagSpec ExtensionFlag]
1613 ( "CPP", Opt_Cpp, nop ),
1614 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1615 ( "TupleSections", Opt_TupleSections, nop ),
1616 ( "PatternGuards", Opt_PatternGuards, nop ),
1617 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1618 ( "MagicHash", Opt_MagicHash, nop ),
1619 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1620 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1621 ( "KindSignatures", Opt_KindSignatures, nop ),
1622 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1623 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1624 ( "TransformListComp", Opt_TransformListComp, nop ),
1625 ( "MonadComprehensions", Opt_MonadComprehensions, nop),
1626 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1627 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1628 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1629 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1630 ( "Rank2Types", Opt_Rank2Types, nop ),
1631 ( "RankNTypes", Opt_RankNTypes, nop ),
1632 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1633 ( "TypeOperators", Opt_TypeOperators, nop ),
1634 ( "RecursiveDo", Opt_RecursiveDo, -- Enables 'mdo'
1635 deprecatedForExtension "DoRec"),
1636 ( "DoRec", Opt_DoRec, nop ), -- Enables 'rec' keyword
1637 ( "Arrows", Opt_Arrows, nop ),
1638 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1639 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1640 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1641 ( "Generics", Opt_Generics, nop ),
1642 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1643 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1644 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1645 ( "RecordPuns", Opt_RecordPuns,
1646 deprecatedForExtension "NamedFieldPuns" ),
1647 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1648 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1649 ( "GADTs", Opt_GADTs, nop ),
1650 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1651 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1652 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1653 ( "BangPatterns", Opt_BangPatterns, nop ),
1654 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1655 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1656 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1657 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1658 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1659 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1660 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1661 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1662 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1663 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1664 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1665 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1666 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1667 \ turn_on -> if not turn_on
1668 then deprecate "You can't turn off RelaxedPolyRec any more"
1670 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1671 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1672 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1674 ( "PatternSignatures", Opt_ScopedTypeVariables,
1675 deprecatedForExtension "ScopedTypeVariables" ),
1677 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1678 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1679 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1680 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1681 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1682 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1683 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1684 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1685 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1686 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1687 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1688 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1689 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1690 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1691 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1692 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1693 ( "PackageImports", Opt_PackageImports, nop )
1696 defaultFlags :: [DynFlag]
1698 = [ Opt_AutoLinkPackages,
1699 Opt_ReadUserPackageConf,
1703 #if GHC_DEFAULT_NEW_CODEGEN
1709 Opt_PrintBindContents,
1714 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1715 -- The default -O0 options
1719 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1721 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1722 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1723 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1724 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1725 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1726 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1727 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1728 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1730 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1732 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1733 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1734 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1736 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1737 -- all over the place
1739 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1741 -- Record wild-cards implies field disambiguation
1742 -- Otherwise if you write (C {..}) you may well get
1743 -- stuff like " 'a' not in scope ", which is a bit silly
1744 -- if the compiler has just filled in field 'a' of constructor 'C'
1745 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1747 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1750 optLevelFlags :: [([Int], DynFlag)]
1752 = [ ([0], Opt_IgnoreInterfacePragmas)
1753 , ([0], Opt_OmitInterfacePragmas)
1755 , ([1,2], Opt_IgnoreAsserts)
1756 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1758 , ([1,2], Opt_DoEtaReduction)
1759 , ([1,2], Opt_CaseMerge)
1760 , ([1,2], Opt_Strictness)
1762 , ([1,2], Opt_FullLaziness)
1763 , ([1,2], Opt_Specialise)
1764 , ([1,2], Opt_FloatIn)
1766 , ([2], Opt_LiberateCase)
1767 , ([2], Opt_SpecConstr)
1768 , ([2], Opt_RegsGraph)
1770 -- , ([2], Opt_StaticArgumentTransformation)
1771 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1772 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1773 -- several improvements to the heuristics, and I'm concerned that without
1774 -- those changes SAT will interfere with some attempts to write "high
1775 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1776 -- this year. In particular, the version in HEAD lacks the tail call
1777 -- criterion, so many things that look like reasonable loops will be
1778 -- turned into functions with extra (unneccesary) thunk creation.
1780 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1781 -- This one is important for a tiresome reason:
1782 -- we want to make sure that the bindings for data
1783 -- constructors are eta-expanded. This is probably
1784 -- a good thing anyway, but it seems fragile.
1787 -- -----------------------------------------------------------------------------
1788 -- Standard sets of warning options
1790 standardWarnings :: [DynFlag]
1792 = [ Opt_WarnWarningsDeprecations,
1793 Opt_WarnDeprecatedFlags,
1794 Opt_WarnUnrecognisedPragmas,
1795 Opt_WarnOverlappingPatterns,
1796 Opt_WarnMissingFields,
1797 Opt_WarnMissingMethods,
1798 Opt_WarnDuplicateExports,
1799 Opt_WarnLazyUnliftedBindings,
1800 Opt_WarnDodgyForeignImports,
1801 Opt_WarnWrongDoBind,
1802 Opt_WarnAlternativeLayoutRuleTransitional
1805 minusWOpts :: [DynFlag]
1806 -- Things you get with -W
1808 = standardWarnings ++
1809 [ Opt_WarnUnusedBinds,
1810 Opt_WarnUnusedMatches,
1811 Opt_WarnUnusedImports,
1812 Opt_WarnIncompletePatterns,
1813 Opt_WarnDodgyExports,
1814 Opt_WarnDodgyImports
1817 minusWallOpts :: [DynFlag]
1818 -- Things you get with -Wall
1821 [ Opt_WarnTypeDefaults,
1822 Opt_WarnNameShadowing,
1823 Opt_WarnMissingSigs,
1826 Opt_WarnUnusedDoBind
1829 minuswRemovesOpts :: [DynFlag]
1830 -- minuswRemovesOpts should be every warning option
1834 Opt_WarnIncompletePatternsRecUpd,
1835 Opt_WarnIncompleteUniPatterns,
1836 Opt_WarnMonomorphism,
1837 Opt_WarnUnrecognisedPragmas,
1838 Opt_WarnAutoOrphans,
1839 Opt_WarnImplicitPrelude
1842 enableGlasgowExts :: DynP ()
1843 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1844 mapM_ setExtensionFlag glasgowExtsFlags
1846 disableGlasgowExts :: DynP ()
1847 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1848 mapM_ unSetExtensionFlag glasgowExtsFlags
1850 glasgowExtsFlags :: [ExtensionFlag]
1851 glasgowExtsFlags = [
1852 Opt_ForeignFunctionInterface
1853 , Opt_UnliftedFFITypes
1854 , Opt_ImplicitParams
1855 , Opt_ScopedTypeVariables
1857 , Opt_TypeSynonymInstances
1858 , Opt_StandaloneDeriving
1859 , Opt_DeriveDataTypeable
1861 , Opt_DeriveFoldable
1862 , Opt_DeriveTraversable
1863 , Opt_FlexibleContexts
1864 , Opt_FlexibleInstances
1865 , Opt_ConstrainedClassMethods
1866 , Opt_MultiParamTypeClasses
1867 , Opt_FunctionalDependencies
1869 , Opt_PolymorphicComponents
1870 , Opt_ExistentialQuantification
1872 , Opt_PostfixOperators
1874 , Opt_LiberalTypeSynonyms
1878 , Opt_ParallelListComp
1879 , Opt_EmptyDataDecls
1880 , Opt_KindSignatures
1881 , Opt_GeneralizedNewtypeDeriving ]
1884 -- Consult the RTS to find whether GHC itself has been built profiled
1885 -- If so, you can't use Template Haskell
1886 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1888 rtsIsProfiled :: Bool
1889 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1892 checkTemplateHaskellOk :: Bool -> DynP ()
1894 checkTemplateHaskellOk turn_on
1895 | turn_on && rtsIsProfiled
1896 = addErr "You can't use Template Haskell with a profiled compiler"
1900 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1901 -- so we simply say "ok". It doesn't matter because TH isn't
1902 -- available in stage 1 anyway.
1903 checkTemplateHaskellOk _ = return ()
1906 {- **********************************************************************
1908 DynFlags constructors
1910 %********************************************************************* -}
1912 type DynP = EwM (CmdLineP DynFlags)
1914 upd :: (DynFlags -> DynFlags) -> DynP ()
1915 upd f = liftEwM (do dflags <- getCmdLineState
1916 putCmdLineState $! f dflags)
1918 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1919 updM f = do dflags <- liftEwM getCmdLineState
1921 liftEwM $ putCmdLineState $! dflags'
1923 --------------- Constructor functions for OptKind -----------------
1924 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1925 noArg fn = NoArg (upd fn)
1927 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1928 noArgM fn = NoArg (updM fn)
1930 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1931 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1933 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1934 hasArg fn = HasArg (upd . fn)
1936 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1937 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1938 ; deprecate deprec })
1940 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1941 intSuffix fn = IntSuffix (\n -> upd (fn n))
1943 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1944 -> OptKind (CmdLineP DynFlags)
1945 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1947 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1948 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1950 --------------------------
1951 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1952 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1953 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1955 --------------------------
1956 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1957 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1960 deps = [ if turn_on then setExtensionFlag d
1961 else unSetExtensionFlag d
1962 | (f', turn_on, d) <- impliedFlags, f' == f ]
1963 -- When you set f, set the ones it implies
1964 -- NB: use setExtensionFlag recursively, in case the implied flags
1965 -- implies further flags
1967 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1968 -- When you un-set f, however, we don't un-set the things it implies
1969 -- (except for -fno-glasgow-exts, which is treated specially)
1971 --------------------------
1972 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
1973 alterSettings f dflags = dflags { settings = f (settings dflags) }
1975 --------------------------
1976 setDumpFlag' :: DynFlag -> DynP ()
1977 setDumpFlag' dump_flag
1978 = do { setDynFlag dump_flag
1979 ; when want_recomp forceRecompile }
1981 -- Certain dumpy-things are really interested in what's going
1982 -- on during recompilation checking, so in those cases we
1983 -- don't want to turn it off.
1984 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1985 Opt_D_dump_hi_diffs]
1987 forceRecompile :: DynP ()
1988 -- Whenver we -ddump, force recompilation (by switching off the
1989 -- recompilation checker), else you don't see the dump! However,
1990 -- don't switch it off in --make mode, else *everything* gets
1991 -- recompiled which probably isn't what you want
1992 forceRecompile = do { dfs <- liftEwM getCmdLineState
1993 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1995 force_recomp dfs = isOneShot (ghcMode dfs)
1997 setVerboseCore2Core :: DynP ()
1998 setVerboseCore2Core = do forceRecompile
1999 setDynFlag Opt_D_verbose_core2core
2000 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2003 setDumpSimplPhases :: String -> DynP ()
2004 setDumpSimplPhases s = do forceRecompile
2005 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2007 spec = case s of { ('=' : s') -> s'; _ -> s }
2009 setVerbosity :: Maybe Int -> DynP ()
2010 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2012 addCmdlineHCInclude :: String -> DynP ()
2013 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2015 extraPkgConf_ :: FilePath -> DynP ()
2016 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2018 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2020 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2022 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2024 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2026 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2028 setPackageName :: String -> DynFlags -> DynFlags
2029 setPackageName p s = s{ thisPackage = stringToPackageId p }
2031 -- If we're linking a binary, then only targets that produce object
2032 -- code are allowed (requests for other target types are ignored).
2033 setTarget :: HscTarget -> DynP ()
2034 setTarget l = upd set
2037 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2040 -- Changes the target only if we're compiling object code. This is
2041 -- used by -fasm and -fllvm, which switch from one to the other, but
2042 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2043 -- can be safely used in an OPTIONS_GHC pragma.
2044 setObjTarget :: HscTarget -> DynP ()
2045 setObjTarget l = updM set
2048 | isObjectTarget (hscTarget dflags)
2051 | cGhcUnregisterised /= "YES" ->
2052 do addWarn ("Compiler not unregisterised, so ignoring " ++
2053 showHscTargetFlag l)
2056 | cGhcWithNativeCodeGen /= "YES" ->
2057 do addWarn ("Compiler has no native codegen, so ignoring " ++
2058 showHscTargetFlag l)
2061 | cGhcUnregisterised == "YES" ->
2062 do addWarn ("Compiler unregisterised, so ignoring " ++
2063 showHscTargetFlag l)
2065 _ -> return $ dflags { hscTarget = l }
2066 | otherwise = return dflags
2068 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2069 setOptLevel n dflags
2070 | hscTarget dflags == HscInterpreted && n > 0
2071 = do addWarn "-O conflicts with --interactive; -O ignored."
2074 = return (updOptLevel n dflags)
2077 -- -Odph is equivalent to
2079 -- -O2 optimise as much as possible
2080 -- -fmax-simplifier-iterations20 this is necessary sometimes
2081 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2083 setDPHOpt :: DynFlags -> DynP DynFlags
2084 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2088 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2089 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2090 -- vectoriser cannot be used.
2092 data DPHBackend = DPHPar -- "dph-par"
2093 | DPHSeq -- "dph-seq"
2094 | DPHThis -- the currently compiled package
2095 | DPHNone -- no DPH library available
2096 deriving(Eq, Ord, Enum, Show)
2098 setDPHBackend :: DPHBackend -> DynP ()
2099 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2101 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2103 dphPackageMaybe :: DynFlags -> Maybe PackageId
2104 dphPackageMaybe dflags
2105 = case dphBackend dflags of
2106 DPHPar -> Just dphParPackageId
2107 DPHSeq -> Just dphSeqPackageId
2108 DPHThis -> Just (thisPackage dflags)
2111 setMainIs :: String -> DynP ()
2113 | not (null main_fn) && isLower (head main_fn)
2114 -- The arg looked like "Foo.Bar.baz"
2115 = upd $ \d -> d{ mainFunIs = Just main_fn,
2116 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2118 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2119 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2121 | otherwise -- The arg looked like "baz"
2122 = upd $ \d -> d{ mainFunIs = Just arg }
2124 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2126 -----------------------------------------------------------------------------
2127 -- Paths & Libraries
2129 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2131 -- -i on its own deletes the import paths
2132 addImportPath "" = upd (\s -> s{importPaths = []})
2133 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2137 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2140 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2142 addFrameworkPath p =
2143 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2145 #ifndef mingw32_TARGET_OS
2146 split_marker :: Char
2147 split_marker = ':' -- not configurable (ToDo)
2150 splitPathList :: String -> [String]
2151 splitPathList s = filter notNull (splitUp s)
2152 -- empty paths are ignored: there might be a trailing
2153 -- ':' in the initial list, for example. Empty paths can
2154 -- cause confusion when they are translated into -I options
2155 -- for passing to gcc.
2157 #ifndef mingw32_TARGET_OS
2158 splitUp xs = split split_marker xs
2160 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2162 -- That is, if "foo:bar:baz" is used, this interpreted as
2163 -- consisting of three entries, 'foo', 'bar', 'baz'.
2164 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2165 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2167 -- Notice that no attempt is made to fully replace the 'standard'
2168 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2169 -- that this will cause too much breakage for users & ':' will
2170 -- work fine even with DOS paths, if you're not insisting on being silly.
2173 splitUp (x:':':div:xs) | div `elem` dir_markers
2174 = ((x:':':div:p): splitUp rs)
2176 (p,rs) = findNextPath xs
2177 -- we used to check for existence of the path here, but that
2178 -- required the IO monad to be threaded through the command-line
2179 -- parser which is quite inconvenient. The
2180 splitUp xs = cons p (splitUp rs)
2182 (p,rs) = findNextPath xs
2187 -- will be called either when we've consumed nought or the
2188 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2189 -- finding the next split marker.
2191 case break (`elem` split_markers) xs of
2192 (p, _:ds) -> (p, ds)
2195 split_markers :: [Char]
2196 split_markers = [':', ';']
2198 dir_markers :: [Char]
2199 dir_markers = ['/', '\\']
2202 -- -----------------------------------------------------------------------------
2203 -- tmpDir, where we store temporary files.
2205 setTmpDir :: FilePath -> DynFlags -> DynFlags
2206 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2207 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2208 -- seem necessary now --SDM 7/2/2008
2210 -----------------------------------------------------------------------------
2213 setRtsOpts :: String -> DynP ()
2214 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2216 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2217 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2219 -----------------------------------------------------------------------------
2222 setOptHpcDir :: String -> DynP ()
2223 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2225 -----------------------------------------------------------------------------
2226 -- Via-C compilation stuff
2228 -- There are some options that we need to pass to gcc when compiling
2229 -- Haskell code via C, but are only supported by recent versions of
2230 -- gcc. The configure script decides which of these options we need,
2231 -- and puts them in the "settings" file in $topdir. The advantage of
2232 -- having these in a separate file is that the file can be created at
2233 -- install-time depending on the available gcc version, and even
2234 -- re-generated later if gcc is upgraded.
2236 -- The options below are not dependent on the version of gcc, only the
2239 picCCOpts :: DynFlags -> [String]
2241 #if darwin_TARGET_OS
2242 -- Apple prefers to do things the other way round.
2243 -- PIC is on by default.
2244 -- -mdynamic-no-pic:
2245 -- Turn off PIC code generation.
2247 -- Don't generate "common" symbols - these are unwanted
2248 -- in dynamic libraries.
2251 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2253 = ["-mdynamic-no-pic"]
2254 #elif mingw32_TARGET_OS
2255 -- no -fPIC for Windows
2257 = ["-U __PIC__","-D__PIC__"]
2261 -- we need -fPIC for C files when we are compiling with -dynamic,
2262 -- otherwise things like stub.c files don't get compiled
2263 -- correctly. They need to reference data in the Haskell
2264 -- objects, but can't without -fPIC. See
2265 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2266 | opt_PIC || not opt_Static
2267 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2272 -- -----------------------------------------------------------------------------
2276 can_split = cSupportsSplitObjs == "YES"
2278 -- -----------------------------------------------------------------------------
2281 compilerInfo :: DynFlags -> [(String, String)]
2283 = -- We always make "Project name" be first to keep parsing in
2284 -- other languages simple, i.e. when looking for other fields,
2285 -- you don't have to worry whether there is a leading '[' or not
2286 ("Project name", cProjectName)
2287 -- Next come the settings, so anything else can be overridden
2288 -- in the settings file (as "lookup" uses the first match for the
2290 : rawSettings dflags
2291 ++ [("Project version", cProjectVersion),
2292 ("Booter version", cBooterVersion),
2294 ("Build platform", cBuildPlatformString),
2295 ("Host platform", cHostPlatformString),
2296 ("Target platform", cTargetPlatformString),
2297 ("Have interpreter", cGhcWithInterpreter),
2298 ("Object splitting supported", cSupportsSplitObjs),
2299 ("Have native code generator", cGhcWithNativeCodeGen),
2300 ("Support SMP", cGhcWithSMP),
2301 ("Unregisterised", cGhcUnregisterised),
2302 ("Tables next to code", cGhcEnableTablesNextToCode),
2303 ("RTS ways", cGhcRTSWays),
2304 ("Leading underscore", cLeadingUnderscore),
2305 ("Debug on", show debugIsOn),
2306 ("LibDir", topDir dflags),
2307 ("Global Package DB", systemPackageConfig dflags),
2308 ("Gcc Linker flags", show cGccLinkerOpts),
2309 ("Ld Linker flags", show cLdLinkerOpts)