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"
80 #ifndef OMIT_NATIVE_CODEGEN
85 import PrelNames ( mAIN )
87 import {-# SOURCE #-} Packages (PackageState)
88 import DriverPhases ( Phase(..), phaseInputExt )
91 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
94 import Maybes ( orElse )
99 import Foreign.C ( CInt )
101 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
104 import System.IO.Unsafe ( unsafePerformIO )
107 import Control.Monad ( when )
111 import Data.Map (Map)
112 import qualified Data.Map as Map
114 import Distribution.System
115 import System.FilePath
116 import System.IO ( stderr, hPutChar )
118 -- -----------------------------------------------------------------------------
121 -- | Enumerates the simple on-or-off dynamic flags
128 | Opt_D_dump_cmmz_pretty
132 | Opt_D_dump_asm_native
133 | Opt_D_dump_asm_liveness
134 | Opt_D_dump_asm_coalesce
135 | Opt_D_dump_asm_regalloc
136 | Opt_D_dump_asm_regalloc_stages
137 | Opt_D_dump_asm_conflicts
138 | Opt_D_dump_asm_stats
139 | Opt_D_dump_asm_expanded
141 | Opt_D_dump_core_stats
147 | Opt_D_dump_inlinings
148 | Opt_D_dump_rule_firings
149 | Opt_D_dump_rule_rewrites
150 | Opt_D_dump_occur_anal
154 | Opt_D_dump_simpl_iterations
155 | Opt_D_dump_simpl_phases
164 | Opt_D_dump_worker_wrapper
165 | Opt_D_dump_rn_trace
166 | Opt_D_dump_rn_stats
168 | Opt_D_dump_simpl_stats
169 | Opt_D_dump_cs_trace -- Constraint solver in type checker
170 | Opt_D_dump_tc_trace
171 | Opt_D_dump_if_trace
172 | Opt_D_dump_vt_trace
179 | Opt_D_verbose_core2core
180 | Opt_D_verbose_stg2stg
182 | Opt_D_dump_hi_diffs
183 | Opt_D_dump_minimal_imports
184 | Opt_D_dump_mod_cycles
185 | Opt_D_dump_view_pattern_commoning
186 | Opt_D_faststring_stats
187 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
188 | Opt_D_no_debug_output
194 | Opt_WarnIsError -- -Werror; makes warnings fatal
195 | Opt_WarnDuplicateExports
197 | Opt_WarnImplicitPrelude
198 | Opt_WarnIncompletePatterns
199 | Opt_WarnIncompleteUniPatterns
200 | Opt_WarnIncompletePatternsRecUpd
201 | Opt_WarnMissingFields
202 | Opt_WarnMissingImportList
203 | Opt_WarnMissingMethods
204 | Opt_WarnMissingSigs
205 | Opt_WarnMissingLocalSigs
206 | Opt_WarnNameShadowing
207 | Opt_WarnOverlappingPatterns
208 | Opt_WarnTypeDefaults
209 | Opt_WarnMonomorphism
210 | Opt_WarnUnusedBinds
211 | Opt_WarnUnusedImports
212 | Opt_WarnUnusedMatches
213 | Opt_WarnWarningsDeprecations
214 | Opt_WarnDeprecatedFlags
215 | Opt_WarnDodgyExports
216 | Opt_WarnDodgyImports
218 | Opt_WarnAutoOrphans
221 | Opt_WarnUnrecognisedPragmas
222 | Opt_WarnDodgyForeignImports
223 | Opt_WarnLazyUnliftedBindings
224 | Opt_WarnUnusedDoBind
225 | Opt_WarnWrongDoBind
226 | Opt_WarnAlternativeLayoutRuleTransitional
228 | Opt_PrintExplicitForalls
235 | Opt_StaticArgumentTransformation
239 | Opt_DoLambdaEtaExpansion
243 | Opt_UnboxStrictFields
244 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
246 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
248 | Opt_RegsGraph -- do graph coloring register allocation
249 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
252 | Opt_IgnoreInterfacePragmas
253 | Opt_OmitInterfacePragmas
254 | Opt_ExposeAllUnfoldings
257 | Opt_AutoSccsOnAllToplevs
258 | Opt_AutoSccsOnExportedToplevs
259 | Opt_AutoSccsOnIndividualCafs
265 | Opt_ExcessPrecision
266 | Opt_EagerBlackHoling
267 | Opt_ReadUserPackageConf
271 | Opt_HideAllPackages
272 | Opt_PrintBindResult
276 | Opt_BreakOnException
278 | Opt_PrintEvldWithShow
279 | Opt_PrintBindContents
282 | Opt_EmitExternalCore
284 | Opt_BuildingCabalPackage
292 | Opt_ConvertToZipCfgAndBack
293 | Opt_AutoLinkPackages
294 | Opt_ImplicitImportQualified
302 | Opt_KeepRawTokenStream
307 data Language = Haskell98 | Haskell2010
311 | Opt_OverlappingInstances
312 | Opt_UndecidableInstances
313 | Opt_IncoherentInstances
314 | Opt_MonomorphismRestriction
317 | Opt_RelaxedPolyRec -- Deprecated
318 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
319 | Opt_ForeignFunctionInterface
320 | Opt_UnliftedFFITypes
321 | Opt_GHCForeignImportPrim
322 | Opt_ParallelArrays -- Syntactic support for parallel arrays
323 | Opt_Arrows -- Arrow-notation syntax
324 | Opt_TemplateHaskell
327 | Opt_Generics -- "Derivable type classes"
328 | Opt_ImplicitPrelude
329 | Opt_ScopedTypeVariables
333 | Opt_OverloadedStrings
334 | Opt_DisambiguateRecordFields
335 | Opt_RecordWildCards
341 | Opt_DoAndIfThenElse
342 | Opt_RebindableSyntax
344 | Opt_StandaloneDeriving
345 | Opt_DeriveDataTypeable
347 | Opt_DeriveTraversable
350 | Opt_TypeSynonymInstances
351 | Opt_FlexibleContexts
352 | Opt_FlexibleInstances
353 | Opt_ConstrainedClassMethods
354 | Opt_MultiParamTypeClasses
355 | Opt_FunctionalDependencies
357 | Opt_PolymorphicComponents
358 | Opt_ExistentialQuantification
362 | Opt_ParallelListComp
363 | Opt_TransformListComp
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 #ifndef OMIT_NATIVE_CODEGEN
407 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
409 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
410 importPaths :: [FilePath],
412 mainFunIs :: Maybe String,
413 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
415 dphBackend :: DPHBackend,
417 thisPackage :: PackageId, -- ^ name of package currently being compiled
420 ways :: [Way], -- ^ Way flags from the command line
421 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
422 rtsBuildTag :: String, -- ^ The RTS \"way\"
424 -- For object splitting
425 splitInfo :: Maybe (String,Int),
428 objectDir :: Maybe String,
429 dylibInstallName :: Maybe String,
430 hiDir :: Maybe String,
431 stubDir :: Maybe String,
437 outputFile :: Maybe String,
438 outputHi :: Maybe String,
439 dynLibLoader :: DynLibLoader,
441 -- | This is set by 'DriverPipeline.runPipeline' based on where
442 -- its output is going.
443 dumpPrefix :: Maybe FilePath,
445 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
446 -- Set by @-ddump-file-prefix@
447 dumpPrefixForce :: Maybe FilePath,
449 includePaths :: [String],
450 libraryPaths :: [String],
451 frameworkPaths :: [String], -- used on darwin only
452 cmdlineFrameworks :: [String], -- ditto
454 rtsOpts :: Maybe String,
455 rtsOptsEnabled :: RtsOptsEnabled,
457 hpcDir :: String, -- ^ Path to store the .mix files
459 settings :: Settings,
462 depMakefile :: FilePath,
463 depIncludePkgDeps :: Bool,
464 depExcludeMods :: [ModuleName],
465 depSuffixes :: [String],
468 extraPkgConfs :: [FilePath],
469 -- ^ The @-package-conf@ flags given on the command line, in the order
472 packageFlags :: [PackageFlag],
473 -- ^ The @-package@ and @-hide-package@ flags from the command-line
476 -- NB. do not modify this field, it is calculated by
477 -- Packages.initPackages and Packages.updatePackages.
478 pkgDatabase :: Maybe [PackageConfig],
479 pkgState :: PackageState,
482 -- These have to be IORefs, because the defaultCleanupHandler needs to
483 -- know what to clean when an exception happens
484 filesToClean :: IORef [FilePath],
485 dirsToClean :: IORef (Map FilePath FilePath),
489 -- Don't change this without updating extensionFlags:
490 language :: Maybe Language,
491 -- Don't change this without updating extensionFlags:
492 extensions :: [OnOff ExtensionFlag],
493 -- extensionFlags should always be equal to
494 -- flattenExtensionFlags language extensions
495 extensionFlags :: [ExtensionFlag],
497 -- | Message output action: use "ErrUtils" instead of this if you can
498 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
500 haddockOptions :: Maybe String
503 data Settings = Settings {
504 sGhcUsagePath :: FilePath, -- Filled in by SysTools
505 sGhciUsagePath :: FilePath, -- ditto
507 sTmpDir :: String, -- no trailing '/'
508 -- You shouldn't need to look things up in rawSettings directly.
509 -- They should have their own fields instead.
510 sRawSettings :: [(String, String)],
511 sExtraGccViaCFlags :: [String],
512 sSystemPackageConfig :: FilePath,
513 -- commands for particular phases
515 sPgm_P :: (String,[Option]),
517 sPgm_c :: (String,[Option]),
518 sPgm_s :: (String,[Option]),
519 sPgm_a :: (String,[Option]),
520 sPgm_l :: (String,[Option]),
521 sPgm_dll :: (String,[Option]),
523 sPgm_sysman :: String,
524 sPgm_windres :: String,
525 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
526 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
527 -- options for particular phases
535 sOpt_windres :: [String],
536 sOpt_lo :: [String], -- LLVM: llvm optimiser
537 sOpt_lc :: [String] -- LLVM: llc static compiler
541 ghcUsagePath :: DynFlags -> FilePath
542 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
543 ghciUsagePath :: DynFlags -> FilePath
544 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
545 topDir :: DynFlags -> FilePath
546 topDir dflags = sTopDir (settings dflags)
547 tmpDir :: DynFlags -> String
548 tmpDir dflags = sTmpDir (settings dflags)
549 rawSettings :: DynFlags -> [(String, String)]
550 rawSettings dflags = sRawSettings (settings dflags)
551 extraGccViaCFlags :: DynFlags -> [String]
552 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
553 systemPackageConfig :: DynFlags -> FilePath
554 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
555 pgm_L :: DynFlags -> String
556 pgm_L dflags = sPgm_L (settings dflags)
557 pgm_P :: DynFlags -> (String,[Option])
558 pgm_P dflags = sPgm_P (settings dflags)
559 pgm_F :: DynFlags -> String
560 pgm_F dflags = sPgm_F (settings dflags)
561 pgm_c :: DynFlags -> (String,[Option])
562 pgm_c dflags = sPgm_c (settings dflags)
563 pgm_s :: DynFlags -> (String,[Option])
564 pgm_s dflags = sPgm_s (settings dflags)
565 pgm_a :: DynFlags -> (String,[Option])
566 pgm_a dflags = sPgm_a (settings dflags)
567 pgm_l :: DynFlags -> (String,[Option])
568 pgm_l dflags = sPgm_l (settings dflags)
569 pgm_dll :: DynFlags -> (String,[Option])
570 pgm_dll dflags = sPgm_dll (settings dflags)
571 pgm_T :: DynFlags -> String
572 pgm_T dflags = sPgm_T (settings dflags)
573 pgm_sysman :: DynFlags -> String
574 pgm_sysman dflags = sPgm_sysman (settings dflags)
575 pgm_windres :: DynFlags -> String
576 pgm_windres dflags = sPgm_windres (settings dflags)
577 pgm_lo :: DynFlags -> (String,[Option])
578 pgm_lo dflags = sPgm_lo (settings dflags)
579 pgm_lc :: DynFlags -> (String,[Option])
580 pgm_lc dflags = sPgm_lc (settings dflags)
581 opt_L :: DynFlags -> [String]
582 opt_L dflags = sOpt_L (settings dflags)
583 opt_P :: DynFlags -> [String]
584 opt_P dflags = sOpt_P (settings dflags)
585 opt_F :: DynFlags -> [String]
586 opt_F dflags = sOpt_F (settings dflags)
587 opt_c :: DynFlags -> [String]
588 opt_c dflags = sOpt_c (settings dflags)
589 opt_m :: DynFlags -> [String]
590 opt_m dflags = sOpt_m (settings dflags)
591 opt_a :: DynFlags -> [String]
592 opt_a dflags = sOpt_a (settings dflags)
593 opt_l :: DynFlags -> [String]
594 opt_l dflags = sOpt_l (settings dflags)
595 opt_windres :: DynFlags -> [String]
596 opt_windres dflags = sOpt_windres (settings dflags)
597 opt_lo :: DynFlags -> [String]
598 opt_lo dflags = sOpt_lo (settings dflags)
599 opt_lc :: DynFlags -> [String]
600 opt_lc dflags = sOpt_lc (settings dflags)
602 wayNames :: DynFlags -> [WayName]
603 wayNames = map wayName . ways
605 -- | The target code type of the compilation (if any).
607 -- Whenever you change the target, also make sure to set 'ghcLink' to
608 -- something sensible.
610 -- 'HscNothing' can be used to avoid generating any output, however, note
613 -- * This will not run the desugaring step, thus no warnings generated in
614 -- this step will be output. In particular, this includes warnings related
615 -- to pattern matching. You can run the desugarer manually using
616 -- 'GHC.desugarModule'.
618 -- * If a program uses Template Haskell the typechecker may try to run code
619 -- from an imported module. This will fail if no code has been generated
620 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
621 -- whether this might be the case and choose to either switch to a
622 -- different target or avoid typechecking such modules. (The latter may
623 -- preferable for security reasons.)
626 = HscC -- ^ Generate C code.
627 | HscAsm -- ^ Generate assembly using the native code generator.
628 | HscLlvm -- ^ Generate assembly using the llvm code generator.
629 | HscJava -- ^ Generate Java bytecode.
630 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
631 | HscNothing -- ^ Don't generate any code. See notes above.
634 showHscTargetFlag :: HscTarget -> String
635 showHscTargetFlag HscC = "-fvia-c"
636 showHscTargetFlag HscAsm = "-fasm"
637 showHscTargetFlag HscLlvm = "-fllvm"
638 showHscTargetFlag HscJava = panic "No flag for HscJava"
639 showHscTargetFlag HscInterpreted = "-fbyte-code"
640 showHscTargetFlag HscNothing = "-fno-code"
642 -- | Will this target result in an object file on the disk?
643 isObjectTarget :: HscTarget -> Bool
644 isObjectTarget HscC = True
645 isObjectTarget HscAsm = True
646 isObjectTarget HscLlvm = True
647 isObjectTarget _ = False
649 -- | The 'GhcMode' tells us whether we're doing multi-module
650 -- compilation (controlled via the "GHC" API) or one-shot
651 -- (single-module) compilation. This makes a difference primarily to
652 -- the "Finder": in one-shot mode we look for interface files for
653 -- imported modules, but in multi-module mode we look for source files
654 -- in order to check whether they need to be recompiled.
656 = CompManager -- ^ @\-\-make@, GHCi, etc.
657 | OneShot -- ^ @ghc -c Foo.hs@
658 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
661 instance Outputable GhcMode where
662 ppr CompManager = ptext (sLit "CompManager")
663 ppr OneShot = ptext (sLit "OneShot")
664 ppr MkDepend = ptext (sLit "MkDepend")
666 isOneShot :: GhcMode -> Bool
667 isOneShot OneShot = True
668 isOneShot _other = False
670 -- | What to do in the link step, if there is one.
672 = NoLink -- ^ Don't link at all
673 | LinkBinary -- ^ Link object code into a binary
674 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
675 -- bytecode and object code).
676 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
679 isNoLink :: GhcLink -> Bool
680 isNoLink NoLink = True
683 -- Is it worth evaluating this Bool and caching it in the DynFlags value
684 -- during initDynFlags?
685 doingTickyProfiling :: DynFlags -> Bool
686 doingTickyProfiling _ = opt_Ticky
687 -- XXX -ticky is a static flag, because it implies -debug which is also
688 -- static. If the way flags were made dynamic, we could fix this.
691 = ExposePackage String
692 | ExposePackageId String
694 | IgnorePackage String
697 defaultHscTarget :: HscTarget
698 defaultHscTarget = defaultObjectTarget
700 -- | The 'HscTarget' value corresponding to the default way to create
701 -- object files on the current platform.
702 defaultObjectTarget :: HscTarget
704 | cGhcUnregisterised == "YES" = HscC
705 | cGhcWithNativeCodeGen == "YES" = HscAsm
706 | otherwise = HscLlvm
713 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
716 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
717 initDynFlags :: DynFlags -> IO DynFlags
718 initDynFlags dflags = do
719 -- someday these will be dynamic flags
720 ways <- readIORef v_Ways
721 refFilesToClean <- newIORef []
722 refDirsToClean <- newIORef Map.empty
725 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
726 rtsBuildTag = mkBuildTag ways,
727 filesToClean = refFilesToClean,
728 dirsToClean = refDirsToClean
731 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
732 -- and must be fully initialized by 'GHC.newSession' first.
733 defaultDynFlags :: Settings -> DynFlags
734 defaultDynFlags mySettings =
736 ghcMode = CompManager,
737 ghcLink = LinkBinary,
738 hscTarget = defaultHscTarget,
744 maxSimplIterations = 4,
745 shouldDumpSimplPhase = Nothing,
747 specConstrThreshold = Just 200,
748 specConstrCount = Just 3,
749 liberateCaseThreshold = Just 200,
750 floatLamArgs = Just 0, -- Default: float only if no fvs
751 strictnessBefore = [],
753 #ifndef OMIT_NATIVE_CODEGEN
754 targetPlatform = defaultTargetPlatform,
756 cmdlineHcIncludes = [],
760 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
762 dphBackend = DPHNone,
764 thisPackage = mainPackageId,
767 dylibInstallName = Nothing,
771 objectSuf = phaseInputExt StopLn,
772 hcSuf = phaseInputExt HCc,
775 outputFile = Nothing,
777 dynLibLoader = SystemDependent,
778 dumpPrefix = Nothing,
779 dumpPrefixForce = Nothing,
783 cmdlineFrameworks = [],
785 rtsOptsEnabled = RtsOptsSafeOnly,
791 pkgDatabase = Nothing,
792 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
793 ways = panic "defaultDynFlags: No ways",
794 buildTag = panic "defaultDynFlags: No buildTag",
795 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
797 settings = mySettings,
799 depMakefile = "Makefile",
800 depIncludePkgDeps = False,
803 -- end of ghc -M values
804 filesToClean = panic "defaultDynFlags: No filesToClean",
805 dirsToClean = panic "defaultDynFlags: No dirsToClean",
806 haddockOptions = Nothing,
807 flags = defaultFlags,
810 extensionFlags = flattenExtensionFlags Nothing [],
812 log_action = \severity srcSpan style msg ->
814 SevOutput -> printOutput (msg style)
815 SevInfo -> printErrs (msg style)
816 SevFatal -> printErrs (msg style)
819 printErrs ((mkLocMessage srcSpan msg) style)
820 -- careful (#2302): printErrs prints in UTF-8, whereas
821 -- converting to string first and using hPutStr would
822 -- just emit the low 8 bits of each unicode char.
826 Note [Verbosity levels]
827 ~~~~~~~~~~~~~~~~~~~~~~~
828 0 | print errors & warnings only
829 1 | minimal verbosity: print "compiling M ... done." for each module.
830 2 | equivalent to -dshow-passes
831 3 | equivalent to existing "ghc -v"
832 4 | "ghc -v -ddump-most"
833 5 | "ghc -v -ddump-all"
839 -- OnOffs accumulate in reverse order, so we use foldr in order to
840 -- process them in the right order
841 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
843 flattenExtensionFlags ml = foldr f defaultExtensionFlags
844 where f (On f) flags = f : delete f flags
845 f (Off f) flags = delete f flags
846 defaultExtensionFlags = languageExtensions ml
848 languageExtensions :: Maybe Language -> [ExtensionFlag]
850 languageExtensions Nothing
851 -- Nothing => the default case
852 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
853 -- behaviour the default, to see if anyone notices
855 -- In due course I'd like Opt_MonoLocalBinds to be on by default
856 -- But NB it's implied by GADTs etc
857 -- SLPJ September 2010
858 : Opt_NondecreasingIndentation -- This has been on by default for some time
859 : languageExtensions (Just Haskell2010)
861 languageExtensions (Just Haskell98)
862 = [Opt_ImplicitPrelude,
863 Opt_MonomorphismRestriction,
865 Opt_DatatypeContexts,
866 Opt_NondecreasingIndentation
867 -- strictly speaking non-standard, but we always had this
868 -- on implicitly before the option was added in 7.1, and
869 -- turning it off breaks code, so we're keeping it on for
870 -- backwards compatibility. Cabal uses -XHaskell98 by
871 -- default unless you specify another language.
874 languageExtensions (Just Haskell2010)
875 = [Opt_ImplicitPrelude,
876 Opt_MonomorphismRestriction,
877 Opt_DatatypeContexts,
879 Opt_ForeignFunctionInterface,
884 -- | Test whether a 'DynFlag' is set
885 dopt :: DynFlag -> DynFlags -> Bool
886 dopt f dflags = f `elem` (flags dflags)
889 dopt_set :: DynFlags -> DynFlag -> DynFlags
890 dopt_set dfs f = dfs{ flags = f : flags dfs }
892 -- | Unset a 'DynFlag'
893 dopt_unset :: DynFlags -> DynFlag -> DynFlags
894 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
896 -- | Test whether a 'ExtensionFlag' is set
897 xopt :: ExtensionFlag -> DynFlags -> Bool
898 xopt f dflags = f `elem` extensionFlags dflags
900 -- | Set a 'ExtensionFlag'
901 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
903 = let onoffs = On f : extensions dfs
904 in dfs { extensions = onoffs,
905 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
907 -- | Unset a 'ExtensionFlag'
908 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
910 = let onoffs = Off f : extensions dfs
911 in dfs { extensions = onoffs,
912 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
914 setLanguage :: Language -> DynP ()
915 setLanguage l = upd f
916 where f dfs = let mLang = Just l
917 oneoffs = extensions dfs
920 extensionFlags = flattenExtensionFlags mLang oneoffs
923 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
924 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
925 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
926 -> [a] -- ^ Correctly ordered extracted options
927 getOpts dflags opts = reverse (opts dflags)
928 -- We add to the options from the front, so we need to reverse the list
930 -- | Gets the verbosity flag for the current verbosity level. This is fed to
931 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
932 getVerbFlags :: DynFlags -> [String]
934 | verbosity dflags >= 4 = ["-v"]
937 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
938 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
939 setPgmP, addOptl, addOptP,
940 addCmdlineFramework, addHaddockOpts
941 :: String -> DynFlags -> DynFlags
942 setOutputFile, setOutputHi, setDumpPrefixForce
943 :: Maybe String -> DynFlags -> DynFlags
945 setObjectDir f d = d{ objectDir = Just f}
946 setHiDir f d = d{ hiDir = Just f}
947 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
948 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
949 -- \#included from the .hc file when compiling via C (i.e. unregisterised
951 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
952 setDylibInstallName f d = d{ dylibInstallName = Just f}
954 setObjectSuf f d = d{ objectSuf = f}
955 setHiSuf f d = d{ hiSuf = f}
956 setHcSuf f d = d{ hcSuf = f}
958 setOutputFile f d = d{ outputFile = f}
959 setOutputHi f d = d{ outputHi = f}
961 parseDynLibLoaderMode f d =
963 ("deploy", "") -> d{ dynLibLoader = Deployable }
964 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
965 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
967 setDumpPrefixForce f d = d { dumpPrefixForce = f}
969 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
970 -- Config.hs should really use Option.
971 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
972 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
973 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
976 setDepMakefile :: FilePath -> DynFlags -> DynFlags
977 setDepMakefile f d = d { depMakefile = deOptDep f }
979 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
980 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
982 addDepExcludeMod :: String -> DynFlags -> DynFlags
984 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
986 addDepSuffix :: FilePath -> DynFlags -> DynFlags
987 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
990 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
991 -- we need to strip the "-optdep" off of the arg
992 deOptDep :: String -> String
993 deOptDep x = case stripPrefix "-optdep" x of
997 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
999 addHaddockOpts f d = d{ haddockOptions = Just f}
1001 -- -----------------------------------------------------------------------------
1002 -- Command-line options
1004 -- | When invoking external tools as part of the compilation pipeline, we
1005 -- pass these a sequence of options on the command-line. Rather than
1006 -- just using a list of Strings, we use a type that allows us to distinguish
1007 -- between filepaths and 'other stuff'. The reason for this is that
1008 -- this type gives us a handle on transforming filenames, and filenames only,
1009 -- to whatever format they're expected to be on a particular platform.
1011 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1012 String -- a non-filepath prefix that shouldn't be
1013 -- transformed (e.g., "/out=")
1014 String -- the filepath/filename portion
1017 showOpt :: Option -> String
1018 showOpt (FileOption pre f) = pre ++ f
1019 showOpt (Option s) = s
1021 -----------------------------------------------------------------------------
1022 -- Setting the optimisation level
1024 updOptLevel :: Int -> DynFlags -> DynFlags
1025 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1027 = dfs2{ optLevel = final_n }
1029 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1030 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1031 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1033 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1034 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1036 -- -----------------------------------------------------------------------------
1037 -- StgToDo: abstraction of stg-to-stg passes to run.
1040 = StgDoMassageForProfiling -- should be (next to) last
1041 -- There's also setStgVarInfo, but its absolute "lastness"
1042 -- is so critical that it is hardwired in (no flag).
1045 getStgToDo :: DynFlags -> [StgToDo]
1049 stg_stats = dopt Opt_StgStats dflags
1051 todo1 = if stg_stats then [D_stg_stats] else []
1053 todo2 | WayProf `elem` wayNames dflags
1054 = StgDoMassageForProfiling : todo1
1058 {- **********************************************************************
1062 %********************************************************************* -}
1064 -- -----------------------------------------------------------------------------
1065 -- Parsing the dynamic flags.
1067 -- | Parse dynamic flags from a list of command line arguments. Returns the
1068 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1069 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1070 -- flags or missing arguments).
1071 parseDynamicFlags :: Monad m =>
1072 DynFlags -> [Located String]
1073 -> m (DynFlags, [Located String], [Located String])
1074 -- ^ Updated 'DynFlags', left-over arguments, and
1075 -- list of warnings.
1076 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1078 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1079 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1080 parseDynamicNoPackageFlags :: Monad m =>
1081 DynFlags -> [Located String]
1082 -> m (DynFlags, [Located String], [Located String])
1083 -- ^ Updated 'DynFlags', left-over arguments, and
1084 -- list of warnings.
1085 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1087 parseDynamicFlags_ :: Monad m =>
1088 DynFlags -> [Located String] -> Bool
1089 -> m (DynFlags, [Located String], [Located String])
1090 parseDynamicFlags_ dflags0 args pkg_flags = do
1091 -- XXX Legacy support code
1092 -- We used to accept things like
1093 -- optdep-f -optdepdepend
1094 -- optdep-f -optdep depend
1095 -- optdep -f -optdepdepend
1096 -- optdep -f -optdep depend
1097 -- but the spaces trip up proper argument handling. So get rid of them.
1098 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1099 f (x : xs) = x : f xs
1103 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1104 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1105 | otherwise = dynamic_flags
1107 let ((leftover, errs, warns), dflags1)
1108 = runCmdLine (processArgs flag_spec args') dflags0
1109 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1111 let (pic_warns, dflags2)
1112 | not (cTargetArch == X86_64 && cTargetOS == Linux) &&
1113 (not opt_Static || opt_PIC) &&
1114 hscTarget dflags1 == HscLlvm
1115 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1116 ++ "dynamic on this platform;\n"
1117 ++ " using " ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
1118 dflags1{ hscTarget = defaultObjectTarget })
1119 | otherwise = ([], dflags1)
1121 return (dflags2, leftover, pic_warns ++ warns)
1124 {- **********************************************************************
1126 DynFlags specifications
1128 %********************************************************************* -}
1130 allFlags :: [String]
1131 allFlags = map ('-':) $
1132 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1133 map ("fno-"++) flags ++
1134 map ("f"++) flags ++
1135 map ("f"++) flags' ++
1136 map ("X"++) supportedExtensions
1137 where ok (PrefixPred _ _) = False
1139 flags = [ name | (name, _, _) <- fFlags ]
1140 flags' = [ name | (name, _, _) <- fLangFlags ]
1142 --------------- The main flags themselves ------------------
1143 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1145 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1146 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1147 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1149 (HasArg (\s -> do { addCmdlineHCInclude s
1150 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1151 , Flag "v" (OptIntSuffix setVerbosity)
1153 ------- Specific phases --------------------------------------------
1154 -- need to appear before -pgmL to be parsed as LLVM flags.
1155 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1156 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1157 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1158 , Flag "pgmP" (hasArg setPgmP)
1159 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1160 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1161 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1162 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1163 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1164 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1165 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1166 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1168 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1169 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1170 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1171 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1172 , Flag "optP" (hasArg addOptP)
1173 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1174 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1175 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1176 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1177 , Flag "optl" (hasArg addOptl)
1178 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1181 (NoArg (if can_split
1182 then setDynFlag Opt_SplitObjs
1183 else addWarn "ignoring -fsplit-objs"))
1185 -------- ghc -M -----------------------------------------------------
1186 , Flag "dep-suffix" (hasArg addDepSuffix)
1187 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1188 , Flag "dep-makefile" (hasArg setDepMakefile)
1189 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1190 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1191 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1192 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1193 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1194 , Flag "exclude-module" (hasArg addDepExcludeMod)
1195 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1196 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1198 -------- Linking ----------------------------------------------------
1199 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1200 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1201 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1202 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1204 ------- Libraries ---------------------------------------------------
1205 , Flag "L" (Prefix addLibraryPath)
1206 , Flag "l" (AnySuffix (upd . addOptl))
1208 ------- Frameworks --------------------------------------------------
1209 -- -framework-path should really be -F ...
1210 , Flag "framework-path" (HasArg addFrameworkPath)
1211 , Flag "framework" (hasArg addCmdlineFramework)
1213 ------- Output Redirection ------------------------------------------
1214 , Flag "odir" (hasArg setObjectDir)
1215 , Flag "o" (SepArg (upd . setOutputFile . Just))
1216 , Flag "ohi" (hasArg (setOutputHi . Just ))
1217 , Flag "osuf" (hasArg setObjectSuf)
1218 , Flag "hcsuf" (hasArg setHcSuf)
1219 , Flag "hisuf" (hasArg setHiSuf)
1220 , Flag "hidir" (hasArg setHiDir)
1221 , Flag "tmpdir" (hasArg setTmpDir)
1222 , Flag "stubdir" (hasArg setStubDir)
1223 , Flag "outputdir" (hasArg setOutputDir)
1224 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1226 ------- Keeping temporary files -------------------------------------
1227 -- These can be singular (think ghc -c) or plural (think ghc --make)
1228 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1229 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1230 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1231 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1232 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1233 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1234 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1235 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1236 -- This only makes sense as plural
1237 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1239 ------- Miscellaneous ----------------------------------------------
1240 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1241 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1242 , Flag "with-rtsopts" (HasArg setRtsOpts)
1243 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1244 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1245 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1246 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1247 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1248 , Flag "main-is" (SepArg setMainIs)
1249 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1250 , Flag "haddock-opts" (hasArg addHaddockOpts)
1251 , Flag "hpcdir" (SepArg setOptHpcDir)
1253 ------- recompilation checker --------------------------------------
1254 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1255 ; deprecate "Use -fno-force-recomp instead" }))
1256 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1257 ; deprecate "Use -fforce-recomp instead" }))
1259 ------ HsCpp opts ---------------------------------------------------
1260 , Flag "D" (AnySuffix (upd . addOptP))
1261 , Flag "U" (AnySuffix (upd . addOptP))
1263 ------- Include/Import Paths ----------------------------------------
1264 , Flag "I" (Prefix addIncludePath)
1265 , Flag "i" (OptPrefix addImportPath)
1267 ------ Debugging ----------------------------------------------------
1268 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1270 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1271 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1272 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1273 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1274 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1275 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1276 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1277 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1278 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1279 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1280 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1281 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1282 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1283 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1284 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1285 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1286 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1287 ; setDumpFlag' Opt_D_dump_llvm}))
1288 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1289 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1290 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1291 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1292 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1293 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1294 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1295 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1296 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1297 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1298 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1299 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1300 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1301 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1302 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1303 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1304 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1305 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1306 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1307 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1308 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1309 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1310 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1311 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1312 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1313 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1314 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1315 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1316 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1317 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1318 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1319 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1320 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1321 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1322 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1323 ; setVerboseCore2Core }))
1324 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1325 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1326 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1327 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1328 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1329 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1330 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1331 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1332 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1333 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1334 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1335 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1336 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1337 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1338 , Flag "dshow-passes" (NoArg (do forceRecompile
1339 setVerbosity (Just 2)))
1340 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1342 ------ Machine dependant (-m<blah>) stuff ---------------------------
1344 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1345 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1346 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1347 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1349 ------ Warning opts -------------------------------------------------
1350 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1351 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1352 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1353 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1354 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1355 ; deprecate "Use -w instead" }))
1356 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1358 ------ Optimisation flags ------------------------------------------
1359 , Flag "O" (noArgM (setOptLevel 1))
1360 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1361 setOptLevel 0 dflags))
1362 , Flag "Odph" (noArgM setDPHOpt)
1363 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1364 -- If the number is missing, use 1
1366 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1367 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1368 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1369 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1370 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1371 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1372 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1373 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1374 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1375 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1376 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1377 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1378 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1380 ------ Profiling ----------------------------------------------------
1382 -- XXX Should the -f* flags be deprecated?
1383 -- They don't seem to be documented
1384 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1385 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1386 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1387 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1388 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1389 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1390 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1391 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1392 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1394 ------ DPH flags ----------------------------------------------------
1396 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1397 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1398 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1399 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1401 ------ Compiler flags -----------------------------------------------
1403 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1404 , Flag "fvia-c" (NoArg
1405 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1406 , Flag "fvia-C" (NoArg
1407 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1408 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1410 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1411 setTarget HscNothing))
1412 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1413 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1414 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1415 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1417 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1418 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1419 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1420 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1421 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1422 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1423 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1425 package_flags :: [Flag (CmdLineP DynFlags)]
1427 ------- Packages ----------------------------------------------------
1428 Flag "package-conf" (HasArg extraPkgConf_)
1429 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1430 , Flag "package-name" (hasArg setPackageName)
1431 , Flag "package-id" (HasArg exposePackageId)
1432 , Flag "package" (HasArg exposePackage)
1433 , Flag "hide-package" (HasArg hidePackage)
1434 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1435 , Flag "ignore-package" (HasArg ignorePackage)
1436 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1437 ; deprecate "Use -package instead" }))
1440 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1441 -- False <=> we are turning the flag off
1442 turnOn :: TurnOnFlag; turnOn = True
1443 turnOff :: TurnOnFlag; turnOff = False
1446 = ( String -- Flag in string form
1447 , flag -- Flag in internal form
1448 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1449 -- Typically, emit a warning or error
1451 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1452 -> String -- ^ The flag prefix
1453 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1454 -> FlagSpec flag -- ^ Specification of this particular flag
1455 -> Flag (CmdLineP DynFlags)
1456 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1457 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1459 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1460 deprecatedForExtension lang turn_on
1461 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1463 flag | turn_on = lang
1464 | otherwise = "No"++lang
1466 useInstead :: String -> TurnOnFlag -> DynP ()
1467 useInstead flag turn_on
1468 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1470 no = if turn_on then "" else "no-"
1472 nop :: TurnOnFlag -> DynP ()
1475 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1476 fFlags :: [FlagSpec DynFlag]
1478 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1479 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1480 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1481 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1482 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1483 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1484 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1485 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1486 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1487 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1488 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1489 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1490 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1491 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1492 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1493 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1494 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1495 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1496 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1497 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1498 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1499 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1500 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1501 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1502 ( "warn-orphans", Opt_WarnOrphans, nop ),
1503 ( "warn-identities", Opt_WarnIdentities, nop ),
1504 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1505 ( "warn-tabs", Opt_WarnTabs, nop ),
1506 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1507 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1508 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1509 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1510 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1511 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1512 ( "strictness", Opt_Strictness, nop ),
1513 ( "specialise", Opt_Specialise, nop ),
1514 ( "float-in", Opt_FloatIn, nop ),
1515 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1516 ( "full-laziness", Opt_FullLaziness, nop ),
1517 ( "liberate-case", Opt_LiberateCase, nop ),
1518 ( "spec-constr", Opt_SpecConstr, nop ),
1519 ( "cse", Opt_CSE, nop ),
1520 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1521 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1522 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1523 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1524 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1525 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1526 ( "case-merge", Opt_CaseMerge, nop ),
1527 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1528 ( "method-sharing", Opt_MethodSharing,
1529 \_ -> deprecate "doesn't do anything any more"),
1530 -- Remove altogether in GHC 7.2
1531 ( "dicts-cheap", Opt_DictsCheap, nop ),
1532 ( "excess-precision", Opt_ExcessPrecision, nop ),
1533 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1534 ( "print-bind-result", Opt_PrintBindResult, nop ),
1535 ( "force-recomp", Opt_ForceRecomp, nop ),
1536 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1537 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1538 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1539 ( "break-on-exception", Opt_BreakOnException, nop ),
1540 ( "break-on-error", Opt_BreakOnError, nop ),
1541 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1542 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1543 ( "run-cps", Opt_RunCPS, nop ),
1544 ( "run-cpsz", Opt_RunCPSZ, nop ),
1545 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1546 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1547 ( "vectorise", Opt_Vectorise, nop ),
1548 ( "regs-graph", Opt_RegsGraph, nop ),
1549 ( "regs-iterative", Opt_RegsIterative, nop ),
1550 ( "gen-manifest", Opt_GenManifest, nop ),
1551 ( "embed-manifest", Opt_EmbedManifest, nop ),
1552 ( "ext-core", Opt_EmitExternalCore, nop ),
1553 ( "shared-implib", Opt_SharedImplib, nop ),
1554 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1555 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1556 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1557 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1560 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1561 fLangFlags :: [FlagSpec ExtensionFlag]
1563 ( "th", Opt_TemplateHaskell,
1564 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1565 ( "fi", Opt_ForeignFunctionInterface,
1566 deprecatedForExtension "ForeignFunctionInterface" ),
1567 ( "ffi", Opt_ForeignFunctionInterface,
1568 deprecatedForExtension "ForeignFunctionInterface" ),
1569 ( "arrows", Opt_Arrows,
1570 deprecatedForExtension "Arrows" ),
1571 ( "generics", Opt_Generics,
1572 deprecatedForExtension "Generics" ),
1573 ( "implicit-prelude", Opt_ImplicitPrelude,
1574 deprecatedForExtension "ImplicitPrelude" ),
1575 ( "bang-patterns", Opt_BangPatterns,
1576 deprecatedForExtension "BangPatterns" ),
1577 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1578 deprecatedForExtension "MonomorphismRestriction" ),
1579 ( "mono-pat-binds", Opt_MonoPatBinds,
1580 deprecatedForExtension "MonoPatBinds" ),
1581 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1582 deprecatedForExtension "ExtendedDefaultRules" ),
1583 ( "implicit-params", Opt_ImplicitParams,
1584 deprecatedForExtension "ImplicitParams" ),
1585 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1586 deprecatedForExtension "ScopedTypeVariables" ),
1587 ( "parr", Opt_ParallelArrays,
1588 deprecatedForExtension "ParallelArrays" ),
1589 ( "PArr", Opt_ParallelArrays,
1590 deprecatedForExtension "ParallelArrays" ),
1591 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1592 deprecatedForExtension "OverlappingInstances" ),
1593 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1594 deprecatedForExtension "UndecidableInstances" ),
1595 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1596 deprecatedForExtension "IncoherentInstances" )
1599 supportedLanguages :: [String]
1600 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1602 supportedExtensions :: [String]
1603 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1605 supportedLanguagesAndExtensions :: [String]
1606 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1608 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1609 languageFlags :: [FlagSpec Language]
1611 ( "Haskell98", Haskell98, nop ),
1612 ( "Haskell2010", Haskell2010, nop )
1615 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1616 xFlags :: [FlagSpec ExtensionFlag]
1618 ( "CPP", Opt_Cpp, nop ),
1619 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1620 ( "TupleSections", Opt_TupleSections, nop ),
1621 ( "PatternGuards", Opt_PatternGuards, nop ),
1622 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1623 ( "MagicHash", Opt_MagicHash, nop ),
1624 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1625 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1626 ( "KindSignatures", Opt_KindSignatures, nop ),
1627 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1628 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1629 ( "TransformListComp", Opt_TransformListComp, nop ),
1630 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1631 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1632 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1633 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1634 ( "Rank2Types", Opt_Rank2Types, nop ),
1635 ( "RankNTypes", Opt_RankNTypes, nop ),
1636 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1637 ( "TypeOperators", Opt_TypeOperators, nop ),
1638 ( "RecursiveDo", Opt_RecursiveDo,
1639 deprecatedForExtension "DoRec"),
1640 ( "DoRec", Opt_DoRec, nop ),
1641 ( "Arrows", Opt_Arrows, nop ),
1642 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1643 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1644 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1645 ( "Generics", Opt_Generics, nop ),
1646 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1647 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1648 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1649 ( "RecordPuns", Opt_RecordPuns,
1650 deprecatedForExtension "NamedFieldPuns" ),
1651 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1652 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1653 ( "GADTs", Opt_GADTs, nop ),
1654 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1655 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1656 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1657 ( "BangPatterns", Opt_BangPatterns, nop ),
1658 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1659 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1660 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1661 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1662 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1663 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1664 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1665 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1666 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1667 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1668 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1669 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1670 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1671 \ turn_on -> if not turn_on
1672 then deprecate "You can't turn off RelaxedPolyRec any more"
1674 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1675 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1676 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1678 ( "PatternSignatures", Opt_ScopedTypeVariables,
1679 deprecatedForExtension "ScopedTypeVariables" ),
1681 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1682 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1683 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1684 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1685 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1686 ( "DeriveFoldable", Opt_DeriveFoldable, 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)
1754 optLevelFlags :: [([Int], DynFlag)]
1756 = [ ([0], Opt_IgnoreInterfacePragmas)
1757 , ([0], Opt_OmitInterfacePragmas)
1759 , ([1,2], Opt_IgnoreAsserts)
1760 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1762 , ([1,2], Opt_DoEtaReduction)
1763 , ([1,2], Opt_CaseMerge)
1764 , ([1,2], Opt_Strictness)
1766 , ([1,2], Opt_FullLaziness)
1767 , ([1,2], Opt_Specialise)
1768 , ([1,2], Opt_FloatIn)
1770 , ([2], Opt_LiberateCase)
1771 , ([2], Opt_SpecConstr)
1772 , ([2], Opt_RegsGraph)
1774 -- , ([2], Opt_StaticArgumentTransformation)
1775 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1776 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1777 -- several improvements to the heuristics, and I'm concerned that without
1778 -- those changes SAT will interfere with some attempts to write "high
1779 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1780 -- this year. In particular, the version in HEAD lacks the tail call
1781 -- criterion, so many things that look like reasonable loops will be
1782 -- turned into functions with extra (unneccesary) thunk creation.
1784 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1785 -- This one is important for a tiresome reason:
1786 -- we want to make sure that the bindings for data
1787 -- constructors are eta-expanded. This is probably
1788 -- a good thing anyway, but it seems fragile.
1791 -- -----------------------------------------------------------------------------
1792 -- Standard sets of warning options
1794 standardWarnings :: [DynFlag]
1796 = [ Opt_WarnWarningsDeprecations,
1797 Opt_WarnDeprecatedFlags,
1798 Opt_WarnUnrecognisedPragmas,
1799 Opt_WarnOverlappingPatterns,
1800 Opt_WarnMissingFields,
1801 Opt_WarnMissingMethods,
1802 Opt_WarnDuplicateExports,
1803 Opt_WarnLazyUnliftedBindings,
1804 Opt_WarnDodgyForeignImports,
1805 Opt_WarnWrongDoBind,
1806 Opt_WarnAlternativeLayoutRuleTransitional
1809 minusWOpts :: [DynFlag]
1810 -- Things you get with -W
1812 = standardWarnings ++
1813 [ Opt_WarnUnusedBinds,
1814 Opt_WarnUnusedMatches,
1815 Opt_WarnUnusedImports,
1816 Opt_WarnIncompletePatterns,
1817 Opt_WarnDodgyExports,
1818 Opt_WarnDodgyImports
1821 minusWallOpts :: [DynFlag]
1822 -- Things you get with -Wall
1825 [ Opt_WarnTypeDefaults,
1826 Opt_WarnNameShadowing,
1827 Opt_WarnMissingSigs,
1830 Opt_WarnUnusedDoBind
1833 minuswRemovesOpts :: [DynFlag]
1834 -- minuswRemovesOpts should be every warning option
1838 Opt_WarnIncompletePatternsRecUpd,
1839 Opt_WarnIncompleteUniPatterns,
1840 Opt_WarnMonomorphism,
1841 Opt_WarnUnrecognisedPragmas,
1842 Opt_WarnAutoOrphans,
1843 Opt_WarnImplicitPrelude
1846 enableGlasgowExts :: DynP ()
1847 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1848 mapM_ setExtensionFlag glasgowExtsFlags
1850 disableGlasgowExts :: DynP ()
1851 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1852 mapM_ unSetExtensionFlag glasgowExtsFlags
1854 glasgowExtsFlags :: [ExtensionFlag]
1855 glasgowExtsFlags = [
1856 Opt_ForeignFunctionInterface
1857 , Opt_UnliftedFFITypes
1858 , Opt_ImplicitParams
1859 , Opt_ScopedTypeVariables
1861 , Opt_TypeSynonymInstances
1862 , Opt_StandaloneDeriving
1863 , Opt_DeriveDataTypeable
1865 , Opt_DeriveFoldable
1866 , Opt_DeriveTraversable
1867 , Opt_FlexibleContexts
1868 , Opt_FlexibleInstances
1869 , Opt_ConstrainedClassMethods
1870 , Opt_MultiParamTypeClasses
1871 , Opt_FunctionalDependencies
1873 , Opt_PolymorphicComponents
1874 , Opt_ExistentialQuantification
1876 , Opt_PostfixOperators
1878 , Opt_LiberalTypeSynonyms
1882 , Opt_ParallelListComp
1883 , Opt_EmptyDataDecls
1884 , Opt_KindSignatures
1885 , Opt_GeneralizedNewtypeDeriving ]
1888 -- Consult the RTS to find whether GHC itself has been built profiled
1889 -- If so, you can't use Template Haskell
1890 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1892 rtsIsProfiled :: Bool
1893 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1896 checkTemplateHaskellOk :: Bool -> DynP ()
1898 checkTemplateHaskellOk turn_on
1899 | turn_on && rtsIsProfiled
1900 = addErr "You can't use Template Haskell with a profiled compiler"
1904 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1905 -- so we simply say "ok". It doesn't matter because TH isn't
1906 -- available in stage 1 anyway.
1907 checkTemplateHaskellOk _ = return ()
1910 {- **********************************************************************
1912 DynFlags constructors
1914 %********************************************************************* -}
1916 type DynP = EwM (CmdLineP DynFlags)
1918 upd :: (DynFlags -> DynFlags) -> DynP ()
1919 upd f = liftEwM (do dflags <- getCmdLineState
1920 putCmdLineState $! f dflags)
1922 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1923 updM f = do dflags <- liftEwM getCmdLineState
1925 liftEwM $ putCmdLineState $! dflags'
1927 --------------- Constructor functions for OptKind -----------------
1928 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1929 noArg fn = NoArg (upd fn)
1931 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1932 noArgM fn = NoArg (updM fn)
1934 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1935 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1937 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1938 hasArg fn = HasArg (upd . fn)
1940 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1941 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1942 ; deprecate deprec })
1944 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1945 intSuffix fn = IntSuffix (\n -> upd (fn n))
1947 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1948 -> OptKind (CmdLineP DynFlags)
1949 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1951 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1952 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1954 --------------------------
1955 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1956 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1957 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1959 --------------------------
1960 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1961 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1964 deps = [ if turn_on then setExtensionFlag d
1965 else unSetExtensionFlag d
1966 | (f', turn_on, d) <- impliedFlags, f' == f ]
1967 -- When you set f, set the ones it implies
1968 -- NB: use setExtensionFlag recursively, in case the implied flags
1969 -- implies further flags
1971 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1972 -- When you un-set f, however, we don't un-set the things it implies
1973 -- (except for -fno-glasgow-exts, which is treated specially)
1975 --------------------------
1976 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
1977 alterSettings f dflags = dflags { settings = f (settings dflags) }
1979 --------------------------
1980 setDumpFlag' :: DynFlag -> DynP ()
1981 setDumpFlag' dump_flag
1982 = do { setDynFlag dump_flag
1983 ; when want_recomp forceRecompile }
1985 -- Certain dumpy-things are really interested in what's going
1986 -- on during recompilation checking, so in those cases we
1987 -- don't want to turn it off.
1988 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1989 Opt_D_dump_hi_diffs]
1991 forceRecompile :: DynP ()
1992 -- Whenver we -ddump, force recompilation (by switching off the
1993 -- recompilation checker), else you don't see the dump! However,
1994 -- don't switch it off in --make mode, else *everything* gets
1995 -- recompiled which probably isn't what you want
1996 forceRecompile = do { dfs <- liftEwM getCmdLineState
1997 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1999 force_recomp dfs = isOneShot (ghcMode dfs)
2001 setVerboseCore2Core :: DynP ()
2002 setVerboseCore2Core = do forceRecompile
2003 setDynFlag Opt_D_verbose_core2core
2004 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2007 setDumpSimplPhases :: String -> DynP ()
2008 setDumpSimplPhases s = do forceRecompile
2009 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2011 spec = case s of { ('=' : s') -> s'; _ -> s }
2013 setVerbosity :: Maybe Int -> DynP ()
2014 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2016 addCmdlineHCInclude :: String -> DynP ()
2017 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2019 extraPkgConf_ :: FilePath -> DynP ()
2020 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2022 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2024 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2026 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2028 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2030 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2032 setPackageName :: String -> DynFlags -> DynFlags
2033 setPackageName p s = s{ thisPackage = stringToPackageId p }
2035 -- If we're linking a binary, then only targets that produce object
2036 -- code are allowed (requests for other target types are ignored).
2037 setTarget :: HscTarget -> DynP ()
2038 setTarget l = upd set
2041 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2044 -- Changes the target only if we're compiling object code. This is
2045 -- used by -fasm and -fllvm, which switch from one to the other, but
2046 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2047 -- can be safely used in an OPTIONS_GHC pragma.
2048 setObjTarget :: HscTarget -> DynP ()
2049 setObjTarget l = upd set
2052 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2055 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2056 setOptLevel n dflags
2057 | hscTarget dflags == HscInterpreted && n > 0
2058 = do addWarn "-O conflicts with --interactive; -O ignored."
2061 = return (updOptLevel n dflags)
2064 -- -Odph is equivalent to
2066 -- -O2 optimise as much as possible
2067 -- -fmax-simplifier-iterations20 this is necessary sometimes
2068 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2070 setDPHOpt :: DynFlags -> DynP DynFlags
2071 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2075 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2076 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2077 -- vectoriser cannot be used.
2079 data DPHBackend = DPHPar -- "dph-par"
2080 | DPHSeq -- "dph-seq"
2081 | DPHThis -- the currently compiled package
2082 | DPHNone -- no DPH library available
2083 deriving(Eq, Ord, Enum, Show)
2085 setDPHBackend :: DPHBackend -> DynP ()
2086 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2088 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2090 dphPackageMaybe :: DynFlags -> Maybe PackageId
2091 dphPackageMaybe dflags
2092 = case dphBackend dflags of
2093 DPHPar -> Just dphParPackageId
2094 DPHSeq -> Just dphSeqPackageId
2095 DPHThis -> Just (thisPackage dflags)
2098 setMainIs :: String -> DynP ()
2100 | not (null main_fn) && isLower (head main_fn)
2101 -- The arg looked like "Foo.Bar.baz"
2102 = upd $ \d -> d{ mainFunIs = Just main_fn,
2103 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2105 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2106 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2108 | otherwise -- The arg looked like "baz"
2109 = upd $ \d -> d{ mainFunIs = Just arg }
2111 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2113 -----------------------------------------------------------------------------
2114 -- Paths & Libraries
2116 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2118 -- -i on its own deletes the import paths
2119 addImportPath "" = upd (\s -> s{importPaths = []})
2120 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2124 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2127 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2129 addFrameworkPath p =
2130 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2132 #ifndef mingw32_TARGET_OS
2133 split_marker :: Char
2134 split_marker = ':' -- not configurable (ToDo)
2137 splitPathList :: String -> [String]
2138 splitPathList s = filter notNull (splitUp s)
2139 -- empty paths are ignored: there might be a trailing
2140 -- ':' in the initial list, for example. Empty paths can
2141 -- cause confusion when they are translated into -I options
2142 -- for passing to gcc.
2144 #ifndef mingw32_TARGET_OS
2145 splitUp xs = split split_marker xs
2147 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2149 -- That is, if "foo:bar:baz" is used, this interpreted as
2150 -- consisting of three entries, 'foo', 'bar', 'baz'.
2151 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2152 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2154 -- Notice that no attempt is made to fully replace the 'standard'
2155 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2156 -- that this will cause too much breakage for users & ':' will
2157 -- work fine even with DOS paths, if you're not insisting on being silly.
2160 splitUp (x:':':div:xs) | div `elem` dir_markers
2161 = ((x:':':div:p): splitUp rs)
2163 (p,rs) = findNextPath xs
2164 -- we used to check for existence of the path here, but that
2165 -- required the IO monad to be threaded through the command-line
2166 -- parser which is quite inconvenient. The
2167 splitUp xs = cons p (splitUp rs)
2169 (p,rs) = findNextPath xs
2174 -- will be called either when we've consumed nought or the
2175 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2176 -- finding the next split marker.
2178 case break (`elem` split_markers) xs of
2179 (p, _:ds) -> (p, ds)
2182 split_markers :: [Char]
2183 split_markers = [':', ';']
2185 dir_markers :: [Char]
2186 dir_markers = ['/', '\\']
2189 -- -----------------------------------------------------------------------------
2190 -- tmpDir, where we store temporary files.
2192 setTmpDir :: FilePath -> DynFlags -> DynFlags
2193 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2194 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2195 -- seem necessary now --SDM 7/2/2008
2197 -----------------------------------------------------------------------------
2200 setRtsOpts :: String -> DynP ()
2201 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2203 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2204 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2206 -----------------------------------------------------------------------------
2209 setOptHpcDir :: String -> DynP ()
2210 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2212 -----------------------------------------------------------------------------
2213 -- Via-C compilation stuff
2215 -- There are some options that we need to pass to gcc when compiling
2216 -- Haskell code via C, but are only supported by recent versions of
2217 -- gcc. The configure script decides which of these options we need,
2218 -- and puts them in the "settings" file in $topdir. The advantage of
2219 -- having these in a separate file is that the file can be created at
2220 -- install-time depending on the available gcc version, and even
2221 -- re-generated later if gcc is upgraded.
2223 -- The options below are not dependent on the version of gcc, only the
2226 picCCOpts :: DynFlags -> [String]
2228 #if darwin_TARGET_OS
2229 -- Apple prefers to do things the other way round.
2230 -- PIC is on by default.
2231 -- -mdynamic-no-pic:
2232 -- Turn off PIC code generation.
2234 -- Don't generate "common" symbols - these are unwanted
2235 -- in dynamic libraries.
2238 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2240 = ["-mdynamic-no-pic"]
2241 #elif mingw32_TARGET_OS
2242 -- no -fPIC for Windows
2244 = ["-U __PIC__","-D__PIC__"]
2248 -- we need -fPIC for C files when we are compiling with -dynamic,
2249 -- otherwise things like stub.c files don't get compiled
2250 -- correctly. They need to reference data in the Haskell
2251 -- objects, but can't without -fPIC. See
2252 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2253 | opt_PIC || not opt_Static
2254 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2259 -- -----------------------------------------------------------------------------
2263 can_split = cSupportsSplitObjs == "YES"
2265 -- -----------------------------------------------------------------------------
2268 compilerInfo :: DynFlags -> [(String, String)]
2270 = -- We always make "Project name" be first to keep parsing in
2271 -- other languages simple, i.e. when looking for other fields,
2272 -- you don't have to worry whether there is a leading '[' or not
2273 ("Project name", cProjectName)
2274 -- Next come the settings, so anything else can be overridden
2275 -- in the settings file (as "lookup" uses the first match for the
2277 : rawSettings dflags
2278 ++ [("Project version", cProjectVersion),
2279 ("Booter version", cBooterVersion),
2281 ("Build platform", cBuildPlatformString),
2282 ("Host platform", cHostPlatformString),
2283 ("Target platform", cTargetPlatformString),
2284 ("Have interpreter", cGhcWithInterpreter),
2285 ("Object splitting supported", cSupportsSplitObjs),
2286 ("Have native code generator", cGhcWithNativeCodeGen),
2287 ("Support SMP", cGhcWithSMP),
2288 ("Unregisterised", cGhcUnregisterised),
2289 ("Tables next to code", cGhcEnableTablesNextToCode),
2290 ("RTS ways", cGhcRTSWays),
2291 ("Leading underscore", cLeadingUnderscore),
2292 ("Debug on", show debugIsOn),
2293 ("LibDir", topDir dflags),
2294 ("Global Package DB", systemPackageConfig dflags),
2295 ("Gcc Linker flags", show cGccLinkerOpts),
2296 ("Ld Linker flags", show cLdLinkerOpts)
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