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
113 import Distribution.System
114 import System.FilePath
115 import System.IO ( stderr, hPutChar )
117 -- -----------------------------------------------------------------------------
120 -- | Enumerates the simple on-or-off dynamic flags
127 | Opt_D_dump_cmmz_pretty
131 | Opt_D_dump_asm_native
132 | Opt_D_dump_asm_liveness
133 | Opt_D_dump_asm_coalesce
134 | Opt_D_dump_asm_regalloc
135 | Opt_D_dump_asm_regalloc_stages
136 | Opt_D_dump_asm_conflicts
137 | Opt_D_dump_asm_stats
138 | Opt_D_dump_asm_expanded
140 | Opt_D_dump_core_stats
146 | Opt_D_dump_inlinings
147 | Opt_D_dump_rule_firings
148 | Opt_D_dump_rule_rewrites
149 | Opt_D_dump_occur_anal
153 | Opt_D_dump_simpl_iterations
154 | Opt_D_dump_simpl_phases
163 | Opt_D_dump_worker_wrapper
164 | Opt_D_dump_rn_trace
165 | Opt_D_dump_rn_stats
167 | Opt_D_dump_simpl_stats
168 | Opt_D_dump_cs_trace -- Constraint solver in type checker
169 | Opt_D_dump_tc_trace
170 | Opt_D_dump_if_trace
171 | Opt_D_dump_vt_trace
178 | Opt_D_verbose_core2core
179 | Opt_D_verbose_stg2stg
181 | Opt_D_dump_hi_diffs
182 | Opt_D_dump_minimal_imports
183 | Opt_D_dump_mod_cycles
184 | Opt_D_dump_view_pattern_commoning
185 | Opt_D_faststring_stats
186 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
187 | Opt_D_no_debug_output
193 | Opt_WarnIsError -- -Werror; makes warnings fatal
194 | Opt_WarnDuplicateExports
196 | Opt_WarnImplicitPrelude
197 | Opt_WarnIncompletePatterns
198 | Opt_WarnIncompleteUniPatterns
199 | Opt_WarnIncompletePatternsRecUpd
200 | Opt_WarnMissingFields
201 | Opt_WarnMissingImportList
202 | Opt_WarnMissingMethods
203 | Opt_WarnMissingSigs
204 | Opt_WarnMissingLocalSigs
205 | Opt_WarnNameShadowing
206 | Opt_WarnOverlappingPatterns
207 | Opt_WarnTypeDefaults
208 | Opt_WarnMonomorphism
209 | Opt_WarnUnusedBinds
210 | Opt_WarnUnusedImports
211 | Opt_WarnUnusedMatches
212 | Opt_WarnWarningsDeprecations
213 | Opt_WarnDeprecatedFlags
214 | Opt_WarnDodgyExports
215 | Opt_WarnDodgyImports
217 | Opt_WarnAutoOrphans
220 | Opt_WarnUnrecognisedPragmas
221 | Opt_WarnDodgyForeignImports
222 | Opt_WarnLazyUnliftedBindings
223 | Opt_WarnUnusedDoBind
224 | Opt_WarnWrongDoBind
225 | Opt_WarnAlternativeLayoutRuleTransitional
227 | Opt_PrintExplicitForalls
234 | Opt_StaticArgumentTransformation
238 | Opt_DoLambdaEtaExpansion
242 | Opt_UnboxStrictFields
243 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
245 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
247 | Opt_RegsGraph -- do graph coloring register allocation
248 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
251 | Opt_IgnoreInterfacePragmas
252 | Opt_OmitInterfacePragmas
253 | Opt_ExposeAllUnfoldings
256 | Opt_AutoSccsOnAllToplevs
257 | Opt_AutoSccsOnExportedToplevs
258 | Opt_AutoSccsOnIndividualCafs
264 | Opt_ExcessPrecision
265 | Opt_EagerBlackHoling
266 | Opt_ReadUserPackageConf
270 | Opt_HideAllPackages
271 | Opt_PrintBindResult
275 | Opt_BreakOnException
277 | Opt_PrintEvldWithShow
278 | Opt_PrintBindContents
281 | Opt_EmitExternalCore
283 | Opt_BuildingCabalPackage
291 | Opt_ConvertToZipCfgAndBack
292 | Opt_AutoLinkPackages
293 | Opt_ImplicitImportQualified
301 | Opt_KeepRawTokenStream
306 data Language = Haskell98 | Haskell2010
310 | Opt_OverlappingInstances
311 | Opt_UndecidableInstances
312 | Opt_IncoherentInstances
313 | Opt_MonomorphismRestriction
316 | Opt_RelaxedPolyRec -- Deprecated
317 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
318 | Opt_ForeignFunctionInterface
319 | Opt_UnliftedFFITypes
320 | Opt_GHCForeignImportPrim
321 | Opt_ParallelArrays -- Syntactic support for parallel arrays
322 | Opt_Arrows -- Arrow-notation syntax
323 | Opt_TemplateHaskell
326 | Opt_Generics -- "Derivable type classes"
327 | Opt_ImplicitPrelude
328 | Opt_ScopedTypeVariables
332 | Opt_OverloadedStrings
333 | Opt_DisambiguateRecordFields
334 | Opt_RecordWildCards
340 | Opt_DoAndIfThenElse
341 | Opt_RebindableSyntax
343 | Opt_StandaloneDeriving
344 | Opt_DeriveDataTypeable
346 | Opt_DeriveTraversable
349 | Opt_TypeSynonymInstances
350 | Opt_FlexibleContexts
351 | Opt_FlexibleInstances
352 | Opt_ConstrainedClassMethods
353 | Opt_MultiParamTypeClasses
354 | Opt_FunctionalDependencies
356 | Opt_PolymorphicComponents
357 | Opt_ExistentialQuantification
361 | Opt_ParallelListComp
362 | Opt_TransformListComp
363 | Opt_GeneralizedNewtypeDeriving
366 | Opt_PostfixOperators
369 | Opt_LiberalTypeSynonyms
372 | Opt_ImpredicativeTypes
376 | Opt_AlternativeLayoutRule
377 | Opt_AlternativeLayoutRuleTransitional
378 | Opt_DatatypeContexts
379 | Opt_NondecreasingIndentation
383 -- | Contains not only a collection of 'DynFlag's but also a plethora of
384 -- information relating to the compilation of a single file or GHC session
385 data DynFlags = DynFlags {
388 hscTarget :: HscTarget,
389 hscOutName :: String, -- ^ Name of the output file
390 extCoreName :: String, -- ^ Name of the .hcr output file
391 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
392 optLevel :: Int, -- ^ Optimisation level
393 simplPhases :: Int, -- ^ Number of simplifier phases
394 maxSimplIterations :: Int, -- ^ Max simplifier iterations
395 shouldDumpSimplPhase :: Maybe String,
396 ruleCheck :: Maybe String,
397 strictnessBefore :: [Int], -- ^ Additional demand analysis
399 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
400 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
401 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
402 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
403 -- See CoreMonad.FloatOutSwitches
405 #ifndef OMIT_NATIVE_CODEGEN
406 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
408 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
409 importPaths :: [FilePath],
411 mainFunIs :: Maybe String,
412 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
414 dphBackend :: DPHBackend,
416 thisPackage :: PackageId, -- ^ name of package currently being compiled
419 ways :: [Way], -- ^ Way flags from the command line
420 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
421 rtsBuildTag :: String, -- ^ The RTS \"way\"
423 -- For object splitting
424 splitInfo :: Maybe (String,Int),
427 objectDir :: Maybe String,
428 dylibInstallName :: Maybe String,
429 hiDir :: Maybe String,
430 stubDir :: Maybe String,
436 outputFile :: Maybe String,
437 outputHi :: Maybe String,
438 dynLibLoader :: DynLibLoader,
440 -- | This is set by 'DriverPipeline.runPipeline' based on where
441 -- its output is going.
442 dumpPrefix :: Maybe FilePath,
444 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
445 -- Set by @-ddump-file-prefix@
446 dumpPrefixForce :: Maybe FilePath,
448 includePaths :: [String],
449 libraryPaths :: [String],
450 frameworkPaths :: [String], -- used on darwin only
451 cmdlineFrameworks :: [String], -- ditto
453 rtsOpts :: Maybe String,
454 rtsOptsEnabled :: RtsOptsEnabled,
456 hpcDir :: String, -- ^ Path to store the .mix files
458 settings :: Settings,
461 depMakefile :: FilePath,
462 depIncludePkgDeps :: Bool,
463 depExcludeMods :: [ModuleName],
464 depSuffixes :: [String],
467 extraPkgConfs :: [FilePath],
468 -- ^ The @-package-conf@ flags given on the command line, in the order
471 packageFlags :: [PackageFlag],
472 -- ^ The @-package@ and @-hide-package@ flags from the command-line
475 -- NB. do not modify this field, it is calculated by
476 -- Packages.initPackages and Packages.updatePackages.
477 pkgDatabase :: Maybe [PackageConfig],
478 pkgState :: PackageState,
481 -- These have to be IORefs, because the defaultCleanupHandler needs to
482 -- know what to clean when an exception happens
483 filesToClean :: IORef [FilePath],
484 dirsToClean :: IORef (Map FilePath FilePath),
488 -- Don't change this without updating extensionFlags:
489 language :: Maybe Language,
490 -- Don't change this without updating extensionFlags:
491 extensions :: [OnOff ExtensionFlag],
492 -- extensionFlags should always be equal to
493 -- flattenExtensionFlags language extensions
494 extensionFlags :: [ExtensionFlag],
496 -- | Message output action: use "ErrUtils" instead of this if you can
497 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
499 haddockOptions :: Maybe String
502 data Settings = Settings {
503 sGhcUsagePath :: FilePath, -- Filled in by SysTools
504 sGhciUsagePath :: FilePath, -- ditto
506 sTmpDir :: String, -- no trailing '/'
507 -- You shouldn't need to look things up in rawSettings directly.
508 -- They should have their own fields instead.
509 sRawSettings :: [(String, String)],
510 sExtraGccViaCFlags :: [String],
511 sSystemPackageConfig :: FilePath,
512 -- commands for particular phases
514 sPgm_P :: (String,[Option]),
516 sPgm_c :: (String,[Option]),
517 sPgm_s :: (String,[Option]),
518 sPgm_a :: (String,[Option]),
519 sPgm_l :: (String,[Option]),
520 sPgm_dll :: (String,[Option]),
522 sPgm_sysman :: String,
523 sPgm_windres :: String,
524 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
525 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
526 -- options for particular phases
534 sOpt_windres :: [String],
535 sOpt_lo :: [String], -- LLVM: llvm optimiser
536 sOpt_lc :: [String] -- LLVM: llc static compiler
540 ghcUsagePath :: DynFlags -> FilePath
541 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
542 ghciUsagePath :: DynFlags -> FilePath
543 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
544 topDir :: DynFlags -> FilePath
545 topDir dflags = sTopDir (settings dflags)
546 tmpDir :: DynFlags -> String
547 tmpDir dflags = sTmpDir (settings dflags)
548 rawSettings :: DynFlags -> [(String, String)]
549 rawSettings dflags = sRawSettings (settings dflags)
550 extraGccViaCFlags :: DynFlags -> [String]
551 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
552 systemPackageConfig :: DynFlags -> FilePath
553 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
554 pgm_L :: DynFlags -> String
555 pgm_L dflags = sPgm_L (settings dflags)
556 pgm_P :: DynFlags -> (String,[Option])
557 pgm_P dflags = sPgm_P (settings dflags)
558 pgm_F :: DynFlags -> String
559 pgm_F dflags = sPgm_F (settings dflags)
560 pgm_c :: DynFlags -> (String,[Option])
561 pgm_c dflags = sPgm_c (settings dflags)
562 pgm_s :: DynFlags -> (String,[Option])
563 pgm_s dflags = sPgm_s (settings dflags)
564 pgm_a :: DynFlags -> (String,[Option])
565 pgm_a dflags = sPgm_a (settings dflags)
566 pgm_l :: DynFlags -> (String,[Option])
567 pgm_l dflags = sPgm_l (settings dflags)
568 pgm_dll :: DynFlags -> (String,[Option])
569 pgm_dll dflags = sPgm_dll (settings dflags)
570 pgm_T :: DynFlags -> String
571 pgm_T dflags = sPgm_T (settings dflags)
572 pgm_sysman :: DynFlags -> String
573 pgm_sysman dflags = sPgm_sysman (settings dflags)
574 pgm_windres :: DynFlags -> String
575 pgm_windres dflags = sPgm_windres (settings dflags)
576 pgm_lo :: DynFlags -> (String,[Option])
577 pgm_lo dflags = sPgm_lo (settings dflags)
578 pgm_lc :: DynFlags -> (String,[Option])
579 pgm_lc dflags = sPgm_lc (settings dflags)
580 opt_L :: DynFlags -> [String]
581 opt_L dflags = sOpt_L (settings dflags)
582 opt_P :: DynFlags -> [String]
583 opt_P dflags = sOpt_P (settings dflags)
584 opt_F :: DynFlags -> [String]
585 opt_F dflags = sOpt_F (settings dflags)
586 opt_c :: DynFlags -> [String]
587 opt_c dflags = sOpt_c (settings dflags)
588 opt_m :: DynFlags -> [String]
589 opt_m dflags = sOpt_m (settings dflags)
590 opt_a :: DynFlags -> [String]
591 opt_a dflags = sOpt_a (settings dflags)
592 opt_l :: DynFlags -> [String]
593 opt_l dflags = sOpt_l (settings dflags)
594 opt_windres :: DynFlags -> [String]
595 opt_windres dflags = sOpt_windres (settings dflags)
596 opt_lo :: DynFlags -> [String]
597 opt_lo dflags = sOpt_lo (settings dflags)
598 opt_lc :: DynFlags -> [String]
599 opt_lc dflags = sOpt_lc (settings dflags)
601 wayNames :: DynFlags -> [WayName]
602 wayNames = map wayName . ways
604 -- | The target code type of the compilation (if any).
606 -- Whenever you change the target, also make sure to set 'ghcLink' to
607 -- something sensible.
609 -- 'HscNothing' can be used to avoid generating any output, however, note
612 -- * This will not run the desugaring step, thus no warnings generated in
613 -- this step will be output. In particular, this includes warnings related
614 -- to pattern matching. You can run the desugarer manually using
615 -- 'GHC.desugarModule'.
617 -- * If a program uses Template Haskell the typechecker may try to run code
618 -- from an imported module. This will fail if no code has been generated
619 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
620 -- whether this might be the case and choose to either switch to a
621 -- different target or avoid typechecking such modules. (The latter may
622 -- preferable for security reasons.)
625 = HscC -- ^ Generate C code.
626 | HscAsm -- ^ Generate assembly using the native code generator.
627 | HscLlvm -- ^ Generate assembly using the llvm code generator.
628 | HscJava -- ^ Generate Java bytecode.
629 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
630 | HscNothing -- ^ Don't generate any code. See notes above.
633 showHscTargetFlag :: HscTarget -> String
634 showHscTargetFlag HscC = "-fvia-c"
635 showHscTargetFlag HscAsm = "-fasm"
636 showHscTargetFlag HscLlvm = "-fllvm"
637 showHscTargetFlag HscJava = panic "No flag for HscJava"
638 showHscTargetFlag HscInterpreted = "-fbyte-code"
639 showHscTargetFlag HscNothing = "-fno-code"
641 -- | Will this target result in an object file on the disk?
642 isObjectTarget :: HscTarget -> Bool
643 isObjectTarget HscC = True
644 isObjectTarget HscAsm = True
645 isObjectTarget HscLlvm = True
646 isObjectTarget _ = False
648 -- | The 'GhcMode' tells us whether we're doing multi-module
649 -- compilation (controlled via the "GHC" API) or one-shot
650 -- (single-module) compilation. This makes a difference primarily to
651 -- the "Finder": in one-shot mode we look for interface files for
652 -- imported modules, but in multi-module mode we look for source files
653 -- in order to check whether they need to be recompiled.
655 = CompManager -- ^ @\-\-make@, GHCi, etc.
656 | OneShot -- ^ @ghc -c Foo.hs@
657 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
660 instance Outputable GhcMode where
661 ppr CompManager = ptext (sLit "CompManager")
662 ppr OneShot = ptext (sLit "OneShot")
663 ppr MkDepend = ptext (sLit "MkDepend")
665 isOneShot :: GhcMode -> Bool
666 isOneShot OneShot = True
667 isOneShot _other = False
669 -- | What to do in the link step, if there is one.
671 = NoLink -- ^ Don't link at all
672 | LinkBinary -- ^ Link object code into a binary
673 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
674 -- bytecode and object code).
675 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
678 isNoLink :: GhcLink -> Bool
679 isNoLink NoLink = True
682 -- Is it worth evaluating this Bool and caching it in the DynFlags value
683 -- during initDynFlags?
684 doingTickyProfiling :: DynFlags -> Bool
685 doingTickyProfiling _ = opt_Ticky
686 -- XXX -ticky is a static flag, because it implies -debug which is also
687 -- static. If the way flags were made dynamic, we could fix this.
690 = ExposePackage String
691 | ExposePackageId String
693 | IgnorePackage String
696 defaultHscTarget :: HscTarget
697 defaultHscTarget = defaultObjectTarget
699 -- | The 'HscTarget' value corresponding to the default way to create
700 -- object files on the current platform.
701 defaultObjectTarget :: HscTarget
703 | cGhcUnregisterised == "YES" = HscC
704 | cGhcWithNativeCodeGen == "YES" = HscAsm
705 | otherwise = HscLlvm
712 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
715 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
716 initDynFlags :: DynFlags -> IO DynFlags
717 initDynFlags dflags = do
718 -- someday these will be dynamic flags
719 ways <- readIORef v_Ways
720 refFilesToClean <- newIORef []
721 refDirsToClean <- newIORef Map.empty
724 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
725 rtsBuildTag = mkBuildTag ways,
726 filesToClean = refFilesToClean,
727 dirsToClean = refDirsToClean
730 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
731 -- and must be fully initialized by 'GHC.newSession' first.
732 defaultDynFlags :: Settings -> DynFlags
733 defaultDynFlags mySettings =
735 ghcMode = CompManager,
736 ghcLink = LinkBinary,
737 hscTarget = defaultHscTarget,
743 maxSimplIterations = 4,
744 shouldDumpSimplPhase = Nothing,
746 specConstrThreshold = Just 200,
747 specConstrCount = Just 3,
748 liberateCaseThreshold = Just 200,
749 floatLamArgs = Just 0, -- Default: float only if no fvs
750 strictnessBefore = [],
752 #ifndef OMIT_NATIVE_CODEGEN
753 targetPlatform = defaultTargetPlatform,
755 cmdlineHcIncludes = [],
759 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
761 dphBackend = DPHNone,
763 thisPackage = mainPackageId,
766 dylibInstallName = Nothing,
770 objectSuf = phaseInputExt StopLn,
771 hcSuf = phaseInputExt HCc,
774 outputFile = Nothing,
776 dynLibLoader = SystemDependent,
777 dumpPrefix = Nothing,
778 dumpPrefixForce = Nothing,
782 cmdlineFrameworks = [],
784 rtsOptsEnabled = RtsOptsSafeOnly,
790 pkgDatabase = Nothing,
791 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
792 ways = panic "defaultDynFlags: No ways",
793 buildTag = panic "defaultDynFlags: No buildTag",
794 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
796 settings = mySettings,
798 depMakefile = "Makefile",
799 depIncludePkgDeps = False,
802 -- end of ghc -M values
803 filesToClean = panic "defaultDynFlags: No filesToClean",
804 dirsToClean = panic "defaultDynFlags: No dirsToClean",
805 haddockOptions = Nothing,
806 flags = defaultFlags,
809 extensionFlags = flattenExtensionFlags Nothing [],
811 log_action = \severity srcSpan style msg ->
813 SevOutput -> printOutput (msg style)
814 SevInfo -> printErrs (msg style)
815 SevFatal -> printErrs (msg style)
818 printErrs ((mkLocMessage srcSpan msg) style)
819 -- careful (#2302): printErrs prints in UTF-8, whereas
820 -- converting to string first and using hPutStr would
821 -- just emit the low 8 bits of each unicode char.
825 Note [Verbosity levels]
826 ~~~~~~~~~~~~~~~~~~~~~~~
827 0 | print errors & warnings only
828 1 | minimal verbosity: print "compiling M ... done." for each module.
829 2 | equivalent to -dshow-passes
830 3 | equivalent to existing "ghc -v"
831 4 | "ghc -v -ddump-most"
832 5 | "ghc -v -ddump-all"
838 -- OnOffs accumulate in reverse order, so we use foldr in order to
839 -- process them in the right order
840 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
842 flattenExtensionFlags ml = foldr f defaultExtensionFlags
843 where f (On f) flags = f : delete f flags
844 f (Off f) flags = delete f flags
845 defaultExtensionFlags = languageExtensions ml
847 languageExtensions :: Maybe Language -> [ExtensionFlag]
849 languageExtensions Nothing
850 -- Nothing => the default case
851 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
852 -- behaviour the default, to see if anyone notices
854 -- In due course I'd like Opt_MonoLocalBinds to be on by default
855 -- But NB it's implied by GADTs etc
856 -- SLPJ September 2010
857 : Opt_NondecreasingIndentation -- This has been on by default for some time
858 : languageExtensions (Just Haskell2010)
860 languageExtensions (Just Haskell98)
861 = [Opt_ImplicitPrelude,
862 Opt_MonomorphismRestriction,
864 Opt_DatatypeContexts,
865 Opt_NondecreasingIndentation
866 -- strictly speaking non-standard, but we always had this
867 -- on implicitly before the option was added in 7.1, and
868 -- turning it off breaks code, so we're keeping it on for
869 -- backwards compatibility. Cabal uses -XHaskell98 by
870 -- default unless you specify another language.
873 languageExtensions (Just Haskell2010)
874 = [Opt_ImplicitPrelude,
875 Opt_MonomorphismRestriction,
876 Opt_DatatypeContexts,
878 Opt_ForeignFunctionInterface,
883 -- | Test whether a 'DynFlag' is set
884 dopt :: DynFlag -> DynFlags -> Bool
885 dopt f dflags = f `elem` (flags dflags)
888 dopt_set :: DynFlags -> DynFlag -> DynFlags
889 dopt_set dfs f = dfs{ flags = f : flags dfs }
891 -- | Unset a 'DynFlag'
892 dopt_unset :: DynFlags -> DynFlag -> DynFlags
893 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
895 -- | Test whether a 'ExtensionFlag' is set
896 xopt :: ExtensionFlag -> DynFlags -> Bool
897 xopt f dflags = f `elem` extensionFlags dflags
899 -- | Set a 'ExtensionFlag'
900 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
902 = let onoffs = On f : extensions dfs
903 in dfs { extensions = onoffs,
904 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
906 -- | Unset a 'ExtensionFlag'
907 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
909 = let onoffs = Off f : extensions dfs
910 in dfs { extensions = onoffs,
911 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
913 setLanguage :: Language -> DynP ()
914 setLanguage l = upd f
915 where f dfs = let mLang = Just l
916 oneoffs = extensions dfs
919 extensionFlags = flattenExtensionFlags mLang oneoffs
922 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
923 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
924 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
925 -> [a] -- ^ Correctly ordered extracted options
926 getOpts dflags opts = reverse (opts dflags)
927 -- We add to the options from the front, so we need to reverse the list
929 -- | Gets the verbosity flag for the current verbosity level. This is fed to
930 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
931 getVerbFlags :: DynFlags -> [String]
933 | verbosity dflags >= 4 = ["-v"]
936 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
937 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
938 setPgmP, addOptl, addOptP,
939 addCmdlineFramework, addHaddockOpts
940 :: String -> DynFlags -> DynFlags
941 setOutputFile, setOutputHi, setDumpPrefixForce
942 :: Maybe String -> DynFlags -> DynFlags
944 setObjectDir f d = d{ objectDir = Just f}
945 setHiDir f d = d{ hiDir = Just f}
946 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
947 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
948 -- \#included from the .hc file when compiling via C (i.e. unregisterised
950 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
951 setDylibInstallName f d = d{ dylibInstallName = Just f}
953 setObjectSuf f d = d{ objectSuf = f}
954 setHiSuf f d = d{ hiSuf = f}
955 setHcSuf f d = d{ hcSuf = f}
957 setOutputFile f d = d{ outputFile = f}
958 setOutputHi f d = d{ outputHi = f}
960 parseDynLibLoaderMode f d =
962 ("deploy", "") -> d{ dynLibLoader = Deployable }
963 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
964 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
966 setDumpPrefixForce f d = d { dumpPrefixForce = f}
968 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
969 -- Config.hs should really use Option.
970 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
971 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
972 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
975 setDepMakefile :: FilePath -> DynFlags -> DynFlags
976 setDepMakefile f d = d { depMakefile = deOptDep f }
978 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
979 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
981 addDepExcludeMod :: String -> DynFlags -> DynFlags
983 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
985 addDepSuffix :: FilePath -> DynFlags -> DynFlags
986 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
989 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
990 -- we need to strip the "-optdep" off of the arg
991 deOptDep :: String -> String
992 deOptDep x = case stripPrefix "-optdep" x of
996 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
998 addHaddockOpts f d = d{ haddockOptions = Just f}
1000 -- -----------------------------------------------------------------------------
1001 -- Command-line options
1003 -- | When invoking external tools as part of the compilation pipeline, we
1004 -- pass these a sequence of options on the command-line. Rather than
1005 -- just using a list of Strings, we use a type that allows us to distinguish
1006 -- between filepaths and 'other stuff'. The reason for this is that
1007 -- this type gives us a handle on transforming filenames, and filenames only,
1008 -- to whatever format they're expected to be on a particular platform.
1010 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1011 String -- a non-filepath prefix that shouldn't be
1012 -- transformed (e.g., "/out=")
1013 String -- the filepath/filename portion
1016 showOpt :: Option -> String
1017 showOpt (FileOption pre f) = pre ++ f
1018 showOpt (Option s) = s
1020 -----------------------------------------------------------------------------
1021 -- Setting the optimisation level
1023 updOptLevel :: Int -> DynFlags -> DynFlags
1024 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1026 = dfs2{ optLevel = final_n }
1028 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1029 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1030 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1032 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1033 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1035 -- -----------------------------------------------------------------------------
1036 -- StgToDo: abstraction of stg-to-stg passes to run.
1039 = StgDoMassageForProfiling -- should be (next to) last
1040 -- There's also setStgVarInfo, but its absolute "lastness"
1041 -- is so critical that it is hardwired in (no flag).
1044 getStgToDo :: DynFlags -> [StgToDo]
1048 stg_stats = dopt Opt_StgStats dflags
1050 todo1 = if stg_stats then [D_stg_stats] else []
1052 todo2 | WayProf `elem` wayNames dflags
1053 = StgDoMassageForProfiling : todo1
1057 {- **********************************************************************
1061 %********************************************************************* -}
1063 -- -----------------------------------------------------------------------------
1064 -- Parsing the dynamic flags.
1066 -- | Parse dynamic flags from a list of command line arguments. Returns the
1067 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1068 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1069 -- flags or missing arguments).
1070 parseDynamicFlags :: Monad m =>
1071 DynFlags -> [Located String]
1072 -> m (DynFlags, [Located String], [Located String])
1073 -- ^ Updated 'DynFlags', left-over arguments, and
1074 -- list of warnings.
1075 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1077 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1078 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1079 parseDynamicNoPackageFlags :: Monad m =>
1080 DynFlags -> [Located String]
1081 -> m (DynFlags, [Located String], [Located String])
1082 -- ^ Updated 'DynFlags', left-over arguments, and
1083 -- list of warnings.
1084 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1086 parseDynamicFlags_ :: Monad m =>
1087 DynFlags -> [Located String] -> Bool
1088 -> m (DynFlags, [Located String], [Located String])
1089 parseDynamicFlags_ dflags0 args pkg_flags = do
1090 -- XXX Legacy support code
1091 -- We used to accept things like
1092 -- optdep-f -optdepdepend
1093 -- optdep-f -optdep depend
1094 -- optdep -f -optdepdepend
1095 -- optdep -f -optdep depend
1096 -- but the spaces trip up proper argument handling. So get rid of them.
1097 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1098 f (x : xs) = x : f xs
1102 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1103 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1104 | otherwise = dynamic_flags
1106 let ((leftover, errs, warns), dflags1)
1107 = runCmdLine (processArgs flag_spec args') dflags0
1108 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1110 let (pic_warns, dflags2)
1111 | not (cTargetArch == X86_64 && cTargetOS == Linux) &&
1112 (not opt_Static || opt_PIC) &&
1113 hscTarget dflags1 == HscLlvm
1114 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1115 ++ "dynamic on this platform;\n"
1116 ++ " using " ++ showHscTargetFlag defaultObjectTarget ++ " instead"],
1117 dflags1{ hscTarget = defaultObjectTarget })
1118 | otherwise = ([], dflags1)
1120 return (dflags2, leftover, pic_warns ++ warns)
1123 {- **********************************************************************
1125 DynFlags specifications
1127 %********************************************************************* -}
1129 allFlags :: [String]
1130 allFlags = map ('-':) $
1131 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1132 map ("fno-"++) flags ++
1133 map ("f"++) flags ++
1134 map ("f"++) flags' ++
1135 map ("X"++) supportedExtensions
1136 where ok (PrefixPred _ _) = False
1138 flags = [ name | (name, _, _) <- fFlags ]
1139 flags' = [ name | (name, _, _) <- fLangFlags ]
1141 --------------- The main flags themselves ------------------
1142 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1144 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1145 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1146 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1148 (HasArg (\s -> do { addCmdlineHCInclude s
1149 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1150 , Flag "v" (OptIntSuffix setVerbosity)
1152 ------- Specific phases --------------------------------------------
1153 -- need to appear before -pgmL to be parsed as LLVM flags.
1154 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1155 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1156 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1157 , Flag "pgmP" (hasArg setPgmP)
1158 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1159 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1160 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1161 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1162 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1163 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1164 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1165 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1167 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1168 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1169 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1170 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1171 , Flag "optP" (hasArg addOptP)
1172 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1173 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1174 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1175 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1176 , Flag "optl" (hasArg addOptl)
1177 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1180 (NoArg (if can_split
1181 then setDynFlag Opt_SplitObjs
1182 else addWarn "ignoring -fsplit-objs"))
1184 -------- ghc -M -----------------------------------------------------
1185 , Flag "dep-suffix" (hasArg addDepSuffix)
1186 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1187 , Flag "dep-makefile" (hasArg setDepMakefile)
1188 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1189 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1190 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1191 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1192 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1193 , Flag "exclude-module" (hasArg addDepExcludeMod)
1194 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1195 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1197 -------- Linking ----------------------------------------------------
1198 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1199 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1200 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1201 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1203 ------- Libraries ---------------------------------------------------
1204 , Flag "L" (Prefix addLibraryPath)
1205 , Flag "l" (AnySuffix (upd . addOptl))
1207 ------- Frameworks --------------------------------------------------
1208 -- -framework-path should really be -F ...
1209 , Flag "framework-path" (HasArg addFrameworkPath)
1210 , Flag "framework" (hasArg addCmdlineFramework)
1212 ------- Output Redirection ------------------------------------------
1213 , Flag "odir" (hasArg setObjectDir)
1214 , Flag "o" (SepArg (upd . setOutputFile . Just))
1215 , Flag "ohi" (hasArg (setOutputHi . Just ))
1216 , Flag "osuf" (hasArg setObjectSuf)
1217 , Flag "hcsuf" (hasArg setHcSuf)
1218 , Flag "hisuf" (hasArg setHiSuf)
1219 , Flag "hidir" (hasArg setHiDir)
1220 , Flag "tmpdir" (hasArg setTmpDir)
1221 , Flag "stubdir" (hasArg setStubDir)
1222 , Flag "outputdir" (hasArg setOutputDir)
1223 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1225 ------- Keeping temporary files -------------------------------------
1226 -- These can be singular (think ghc -c) or plural (think ghc --make)
1227 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1228 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1229 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1230 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1231 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1232 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1233 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1234 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1235 -- This only makes sense as plural
1236 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1238 ------- Miscellaneous ----------------------------------------------
1239 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1240 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1241 , Flag "with-rtsopts" (HasArg setRtsOpts)
1242 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1243 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1244 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1245 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1246 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1247 , Flag "main-is" (SepArg setMainIs)
1248 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1249 , Flag "haddock-opts" (hasArg addHaddockOpts)
1250 , Flag "hpcdir" (SepArg setOptHpcDir)
1252 ------- recompilation checker --------------------------------------
1253 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1254 ; deprecate "Use -fno-force-recomp instead" }))
1255 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1256 ; deprecate "Use -fforce-recomp instead" }))
1258 ------ HsCpp opts ---------------------------------------------------
1259 , Flag "D" (AnySuffix (upd . addOptP))
1260 , Flag "U" (AnySuffix (upd . addOptP))
1262 ------- Include/Import Paths ----------------------------------------
1263 , Flag "I" (Prefix addIncludePath)
1264 , Flag "i" (OptPrefix addImportPath)
1266 ------ Debugging ----------------------------------------------------
1267 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1269 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1270 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1271 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1272 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1273 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1274 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1275 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1276 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1277 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1278 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1279 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1280 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1281 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1282 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1283 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1284 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1285 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1286 ; setDumpFlag' Opt_D_dump_llvm}))
1287 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1288 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1289 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1290 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1291 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1292 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1293 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1294 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1295 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1296 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1297 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1298 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1299 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1300 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1301 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1302 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1303 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1304 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1305 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1306 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1307 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1308 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1309 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1310 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1311 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1312 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1313 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1314 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1315 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1316 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1317 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1318 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1319 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1320 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1321 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1322 ; setVerboseCore2Core }))
1323 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1324 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1325 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1326 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1327 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1328 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1329 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1330 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1331 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1332 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1333 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1334 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1335 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1336 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1337 , Flag "dshow-passes" (NoArg (do forceRecompile
1338 setVerbosity (Just 2)))
1339 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1341 ------ Machine dependant (-m<blah>) stuff ---------------------------
1343 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1344 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1345 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1346 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1348 ------ Warning opts -------------------------------------------------
1349 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1350 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1351 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1352 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1353 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1354 ; deprecate "Use -w instead" }))
1355 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1357 ------ Optimisation flags ------------------------------------------
1358 , Flag "O" (noArgM (setOptLevel 1))
1359 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1360 setOptLevel 0 dflags))
1361 , Flag "Odph" (noArgM setDPHOpt)
1362 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1363 -- If the number is missing, use 1
1365 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1366 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1367 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1368 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1369 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1370 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1371 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1372 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1373 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1374 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1375 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1376 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1377 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1379 ------ Profiling ----------------------------------------------------
1381 -- XXX Should the -f* flags be deprecated?
1382 -- They don't seem to be documented
1383 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1384 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1385 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1386 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1387 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1388 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1389 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1390 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1391 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1393 ------ DPH flags ----------------------------------------------------
1395 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1396 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1397 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1398 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1400 ------ Compiler flags -----------------------------------------------
1402 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1403 , Flag "fvia-c" (NoArg
1404 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1405 , Flag "fvia-C" (NoArg
1406 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1407 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1409 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1410 setTarget HscNothing))
1411 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1412 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1413 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1414 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1416 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1417 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1418 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1419 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1420 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1421 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1422 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1424 package_flags :: [Flag (CmdLineP DynFlags)]
1426 ------- Packages ----------------------------------------------------
1427 Flag "package-conf" (HasArg extraPkgConf_)
1428 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1429 , Flag "package-name" (hasArg setPackageName)
1430 , Flag "package-id" (HasArg exposePackageId)
1431 , Flag "package" (HasArg exposePackage)
1432 , Flag "hide-package" (HasArg hidePackage)
1433 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1434 , Flag "ignore-package" (HasArg ignorePackage)
1435 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1436 ; deprecate "Use -package instead" }))
1439 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1440 -- False <=> we are turning the flag off
1441 turnOn :: TurnOnFlag; turnOn = True
1442 turnOff :: TurnOnFlag; turnOff = False
1445 = ( String -- Flag in string form
1446 , flag -- Flag in internal form
1447 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1448 -- Typically, emit a warning or error
1450 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1451 -> String -- ^ The flag prefix
1452 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1453 -> FlagSpec flag -- ^ Specification of this particular flag
1454 -> Flag (CmdLineP DynFlags)
1455 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1456 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1458 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1459 deprecatedForExtension lang turn_on
1460 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1462 flag | turn_on = lang
1463 | otherwise = "No"++lang
1465 useInstead :: String -> TurnOnFlag -> DynP ()
1466 useInstead flag turn_on
1467 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1469 no = if turn_on then "" else "no-"
1471 nop :: TurnOnFlag -> DynP ()
1474 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1475 fFlags :: [FlagSpec DynFlag]
1477 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1478 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1479 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1480 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1481 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1482 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1483 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1484 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1485 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1486 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1487 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1488 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1489 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1490 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1491 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1492 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1493 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1494 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1495 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1496 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1497 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1498 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1499 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1500 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1501 ( "warn-orphans", Opt_WarnOrphans, nop ),
1502 ( "warn-identities", Opt_WarnIdentities, nop ),
1503 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1504 ( "warn-tabs", Opt_WarnTabs, nop ),
1505 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1506 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1507 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1508 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1509 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1510 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1511 ( "strictness", Opt_Strictness, nop ),
1512 ( "specialise", Opt_Specialise, nop ),
1513 ( "float-in", Opt_FloatIn, nop ),
1514 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1515 ( "full-laziness", Opt_FullLaziness, nop ),
1516 ( "liberate-case", Opt_LiberateCase, nop ),
1517 ( "spec-constr", Opt_SpecConstr, nop ),
1518 ( "cse", Opt_CSE, nop ),
1519 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1520 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1521 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1522 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1523 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1524 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1525 ( "case-merge", Opt_CaseMerge, nop ),
1526 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1527 ( "method-sharing", Opt_MethodSharing,
1528 \_ -> deprecate "doesn't do anything any more"),
1529 -- Remove altogether in GHC 7.2
1530 ( "dicts-cheap", Opt_DictsCheap, nop ),
1531 ( "excess-precision", Opt_ExcessPrecision, nop ),
1532 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1533 ( "print-bind-result", Opt_PrintBindResult, nop ),
1534 ( "force-recomp", Opt_ForceRecomp, nop ),
1535 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1536 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1537 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1538 ( "break-on-exception", Opt_BreakOnException, nop ),
1539 ( "break-on-error", Opt_BreakOnError, nop ),
1540 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1541 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1542 ( "run-cps", Opt_RunCPS, nop ),
1543 ( "run-cpsz", Opt_RunCPSZ, nop ),
1544 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1545 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1546 ( "vectorise", Opt_Vectorise, nop ),
1547 ( "regs-graph", Opt_RegsGraph, nop ),
1548 ( "regs-iterative", Opt_RegsIterative, nop ),
1549 ( "gen-manifest", Opt_GenManifest, nop ),
1550 ( "embed-manifest", Opt_EmbedManifest, nop ),
1551 ( "ext-core", Opt_EmitExternalCore, nop ),
1552 ( "shared-implib", Opt_SharedImplib, nop ),
1553 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1554 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1555 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1556 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1559 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1560 fLangFlags :: [FlagSpec ExtensionFlag]
1562 ( "th", Opt_TemplateHaskell,
1563 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1564 ( "fi", Opt_ForeignFunctionInterface,
1565 deprecatedForExtension "ForeignFunctionInterface" ),
1566 ( "ffi", Opt_ForeignFunctionInterface,
1567 deprecatedForExtension "ForeignFunctionInterface" ),
1568 ( "arrows", Opt_Arrows,
1569 deprecatedForExtension "Arrows" ),
1570 ( "generics", Opt_Generics,
1571 deprecatedForExtension "Generics" ),
1572 ( "implicit-prelude", Opt_ImplicitPrelude,
1573 deprecatedForExtension "ImplicitPrelude" ),
1574 ( "bang-patterns", Opt_BangPatterns,
1575 deprecatedForExtension "BangPatterns" ),
1576 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1577 deprecatedForExtension "MonomorphismRestriction" ),
1578 ( "mono-pat-binds", Opt_MonoPatBinds,
1579 deprecatedForExtension "MonoPatBinds" ),
1580 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1581 deprecatedForExtension "ExtendedDefaultRules" ),
1582 ( "implicit-params", Opt_ImplicitParams,
1583 deprecatedForExtension "ImplicitParams" ),
1584 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1585 deprecatedForExtension "ScopedTypeVariables" ),
1586 ( "parr", Opt_ParallelArrays,
1587 deprecatedForExtension "ParallelArrays" ),
1588 ( "PArr", Opt_ParallelArrays,
1589 deprecatedForExtension "ParallelArrays" ),
1590 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1591 deprecatedForExtension "OverlappingInstances" ),
1592 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1593 deprecatedForExtension "UndecidableInstances" ),
1594 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1595 deprecatedForExtension "IncoherentInstances" )
1598 supportedLanguages :: [String]
1599 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1601 supportedExtensions :: [String]
1602 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1604 supportedLanguagesAndExtensions :: [String]
1605 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1607 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1608 languageFlags :: [FlagSpec Language]
1610 ( "Haskell98", Haskell98, nop ),
1611 ( "Haskell2010", Haskell2010, nop )
1614 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1615 xFlags :: [FlagSpec ExtensionFlag]
1617 ( "CPP", Opt_Cpp, nop ),
1618 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1619 ( "TupleSections", Opt_TupleSections, nop ),
1620 ( "PatternGuards", Opt_PatternGuards, nop ),
1621 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1622 ( "MagicHash", Opt_MagicHash, nop ),
1623 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1624 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1625 ( "KindSignatures", Opt_KindSignatures, nop ),
1626 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1627 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1628 ( "TransformListComp", Opt_TransformListComp, nop ),
1629 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1630 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1631 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1632 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1633 ( "Rank2Types", Opt_Rank2Types, nop ),
1634 ( "RankNTypes", Opt_RankNTypes, nop ),
1635 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1636 ( "TypeOperators", Opt_TypeOperators, nop ),
1637 ( "RecursiveDo", Opt_RecursiveDo,
1638 deprecatedForExtension "DoRec"),
1639 ( "DoRec", Opt_DoRec, nop ),
1640 ( "Arrows", Opt_Arrows, nop ),
1641 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1642 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1643 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1644 ( "Generics", Opt_Generics, nop ),
1645 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1646 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1647 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1648 ( "RecordPuns", Opt_RecordPuns,
1649 deprecatedForExtension "NamedFieldPuns" ),
1650 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1651 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1652 ( "GADTs", Opt_GADTs, nop ),
1653 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1654 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1655 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1656 ( "BangPatterns", Opt_BangPatterns, nop ),
1657 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1658 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1659 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1660 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1661 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1662 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1663 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1664 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1665 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1666 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1667 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1668 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1669 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1670 \ turn_on -> if not turn_on
1671 then deprecate "You can't turn off RelaxedPolyRec any more"
1673 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1674 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1675 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1677 ( "PatternSignatures", Opt_ScopedTypeVariables,
1678 deprecatedForExtension "ScopedTypeVariables" ),
1680 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1681 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1682 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1683 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1684 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1685 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1686 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1687 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1688 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1689 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1690 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1691 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1692 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1693 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1694 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1695 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1696 ( "PackageImports", Opt_PackageImports, nop )
1699 defaultFlags :: [DynFlag]
1701 = [ Opt_AutoLinkPackages,
1702 Opt_ReadUserPackageConf,
1706 #if GHC_DEFAULT_NEW_CODEGEN
1712 Opt_PrintBindContents,
1717 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1718 -- The default -O0 options
1722 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1724 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1725 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1726 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1727 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1728 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1729 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1730 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1731 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1733 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1735 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1736 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1737 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1739 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1740 -- all over the place
1742 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1744 -- Record wild-cards implies field disambiguation
1745 -- Otherwise if you write (C {..}) you may well get
1746 -- stuff like " 'a' not in scope ", which is a bit silly
1747 -- if the compiler has just filled in field 'a' of constructor 'C'
1748 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1750 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1753 optLevelFlags :: [([Int], DynFlag)]
1755 = [ ([0], Opt_IgnoreInterfacePragmas)
1756 , ([0], Opt_OmitInterfacePragmas)
1758 , ([1,2], Opt_IgnoreAsserts)
1759 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1761 , ([1,2], Opt_DoEtaReduction)
1762 , ([1,2], Opt_CaseMerge)
1763 , ([1,2], Opt_Strictness)
1765 , ([1,2], Opt_FullLaziness)
1766 , ([1,2], Opt_Specialise)
1767 , ([1,2], Opt_FloatIn)
1769 , ([2], Opt_LiberateCase)
1770 , ([2], Opt_SpecConstr)
1771 , ([2], Opt_RegsGraph)
1773 -- , ([2], Opt_StaticArgumentTransformation)
1774 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1775 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1776 -- several improvements to the heuristics, and I'm concerned that without
1777 -- those changes SAT will interfere with some attempts to write "high
1778 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1779 -- this year. In particular, the version in HEAD lacks the tail call
1780 -- criterion, so many things that look like reasonable loops will be
1781 -- turned into functions with extra (unneccesary) thunk creation.
1783 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1784 -- This one is important for a tiresome reason:
1785 -- we want to make sure that the bindings for data
1786 -- constructors are eta-expanded. This is probably
1787 -- a good thing anyway, but it seems fragile.
1790 -- -----------------------------------------------------------------------------
1791 -- Standard sets of warning options
1793 standardWarnings :: [DynFlag]
1795 = [ Opt_WarnWarningsDeprecations,
1796 Opt_WarnDeprecatedFlags,
1797 Opt_WarnUnrecognisedPragmas,
1798 Opt_WarnOverlappingPatterns,
1799 Opt_WarnMissingFields,
1800 Opt_WarnMissingMethods,
1801 Opt_WarnDuplicateExports,
1802 Opt_WarnLazyUnliftedBindings,
1803 Opt_WarnDodgyForeignImports,
1804 Opt_WarnWrongDoBind,
1805 Opt_WarnAlternativeLayoutRuleTransitional
1808 minusWOpts :: [DynFlag]
1809 -- Things you get with -W
1811 = standardWarnings ++
1812 [ Opt_WarnUnusedBinds,
1813 Opt_WarnUnusedMatches,
1814 Opt_WarnUnusedImports,
1815 Opt_WarnIncompletePatterns,
1816 Opt_WarnDodgyExports,
1817 Opt_WarnDodgyImports
1820 minusWallOpts :: [DynFlag]
1821 -- Things you get with -Wall
1824 [ Opt_WarnTypeDefaults,
1825 Opt_WarnNameShadowing,
1826 Opt_WarnMissingSigs,
1829 Opt_WarnUnusedDoBind
1832 minuswRemovesOpts :: [DynFlag]
1833 -- minuswRemovesOpts should be every warning option
1837 Opt_WarnIncompletePatternsRecUpd,
1838 Opt_WarnIncompleteUniPatterns,
1839 Opt_WarnMonomorphism,
1840 Opt_WarnUnrecognisedPragmas,
1841 Opt_WarnAutoOrphans,
1842 Opt_WarnImplicitPrelude
1845 enableGlasgowExts :: DynP ()
1846 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1847 mapM_ setExtensionFlag glasgowExtsFlags
1849 disableGlasgowExts :: DynP ()
1850 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1851 mapM_ unSetExtensionFlag glasgowExtsFlags
1853 glasgowExtsFlags :: [ExtensionFlag]
1854 glasgowExtsFlags = [
1855 Opt_ForeignFunctionInterface
1856 , Opt_UnliftedFFITypes
1857 , Opt_ImplicitParams
1858 , Opt_ScopedTypeVariables
1860 , Opt_TypeSynonymInstances
1861 , Opt_StandaloneDeriving
1862 , Opt_DeriveDataTypeable
1864 , Opt_DeriveFoldable
1865 , Opt_DeriveTraversable
1866 , Opt_FlexibleContexts
1867 , Opt_FlexibleInstances
1868 , Opt_ConstrainedClassMethods
1869 , Opt_MultiParamTypeClasses
1870 , Opt_FunctionalDependencies
1872 , Opt_PolymorphicComponents
1873 , Opt_ExistentialQuantification
1875 , Opt_PostfixOperators
1877 , Opt_LiberalTypeSynonyms
1881 , Opt_ParallelListComp
1882 , Opt_EmptyDataDecls
1883 , Opt_KindSignatures
1884 , Opt_GeneralizedNewtypeDeriving ]
1887 -- Consult the RTS to find whether GHC itself has been built profiled
1888 -- If so, you can't use Template Haskell
1889 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1891 rtsIsProfiled :: Bool
1892 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1895 checkTemplateHaskellOk :: Bool -> DynP ()
1897 checkTemplateHaskellOk turn_on
1898 | turn_on && rtsIsProfiled
1899 = addErr "You can't use Template Haskell with a profiled compiler"
1903 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1904 -- so we simply say "ok". It doesn't matter because TH isn't
1905 -- available in stage 1 anyway.
1906 checkTemplateHaskellOk _ = return ()
1909 {- **********************************************************************
1911 DynFlags constructors
1913 %********************************************************************* -}
1915 type DynP = EwM (CmdLineP DynFlags)
1917 upd :: (DynFlags -> DynFlags) -> DynP ()
1918 upd f = liftEwM (do dflags <- getCmdLineState
1919 putCmdLineState $! f dflags)
1921 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1922 updM f = do dflags <- liftEwM getCmdLineState
1924 liftEwM $ putCmdLineState $! dflags'
1926 --------------- Constructor functions for OptKind -----------------
1927 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1928 noArg fn = NoArg (upd fn)
1930 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1931 noArgM fn = NoArg (updM fn)
1933 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1934 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1936 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1937 hasArg fn = HasArg (upd . fn)
1939 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1940 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1941 ; deprecate deprec })
1943 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1944 intSuffix fn = IntSuffix (\n -> upd (fn n))
1946 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1947 -> OptKind (CmdLineP DynFlags)
1948 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1950 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1951 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1953 --------------------------
1954 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1955 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1956 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1958 --------------------------
1959 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1960 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1963 deps = [ if turn_on then setExtensionFlag d
1964 else unSetExtensionFlag d
1965 | (f', turn_on, d) <- impliedFlags, f' == f ]
1966 -- When you set f, set the ones it implies
1967 -- NB: use setExtensionFlag recursively, in case the implied flags
1968 -- implies further flags
1970 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1971 -- When you un-set f, however, we don't un-set the things it implies
1972 -- (except for -fno-glasgow-exts, which is treated specially)
1974 --------------------------
1975 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
1976 alterSettings f dflags = dflags { settings = f (settings dflags) }
1978 --------------------------
1979 setDumpFlag' :: DynFlag -> DynP ()
1980 setDumpFlag' dump_flag
1981 = do { setDynFlag dump_flag
1982 ; when want_recomp forceRecompile }
1984 -- Certain dumpy-things are really interested in what's going
1985 -- on during recompilation checking, so in those cases we
1986 -- don't want to turn it off.
1987 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1988 Opt_D_dump_hi_diffs]
1990 forceRecompile :: DynP ()
1991 -- Whenver we -ddump, force recompilation (by switching off the
1992 -- recompilation checker), else you don't see the dump! However,
1993 -- don't switch it off in --make mode, else *everything* gets
1994 -- recompiled which probably isn't what you want
1995 forceRecompile = do { dfs <- liftEwM getCmdLineState
1996 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1998 force_recomp dfs = isOneShot (ghcMode dfs)
2000 setVerboseCore2Core :: DynP ()
2001 setVerboseCore2Core = do forceRecompile
2002 setDynFlag Opt_D_verbose_core2core
2003 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2006 setDumpSimplPhases :: String -> DynP ()
2007 setDumpSimplPhases s = do forceRecompile
2008 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2010 spec = case s of { ('=' : s') -> s'; _ -> s }
2012 setVerbosity :: Maybe Int -> DynP ()
2013 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2015 addCmdlineHCInclude :: String -> DynP ()
2016 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2018 extraPkgConf_ :: FilePath -> DynP ()
2019 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2021 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2023 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2025 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2027 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2029 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2031 setPackageName :: String -> DynFlags -> DynFlags
2032 setPackageName p s = s{ thisPackage = stringToPackageId p }
2034 -- If we're linking a binary, then only targets that produce object
2035 -- code are allowed (requests for other target types are ignored).
2036 setTarget :: HscTarget -> DynP ()
2037 setTarget l = upd set
2040 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2043 -- Changes the target only if we're compiling object code. This is
2044 -- used by -fasm and -fllvm, which switch from one to the other, but
2045 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2046 -- can be safely used in an OPTIONS_GHC pragma.
2047 setObjTarget :: HscTarget -> DynP ()
2048 setObjTarget l = upd set
2051 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2054 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2055 setOptLevel n dflags
2056 | hscTarget dflags == HscInterpreted && n > 0
2057 = do addWarn "-O conflicts with --interactive; -O ignored."
2060 = return (updOptLevel n dflags)
2063 -- -Odph is equivalent to
2065 -- -O2 optimise as much as possible
2066 -- -fmax-simplifier-iterations20 this is necessary sometimes
2067 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2069 setDPHOpt :: DynFlags -> DynP DynFlags
2070 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2074 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2075 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2076 -- vectoriser cannot be used.
2078 data DPHBackend = DPHPar -- "dph-par"
2079 | DPHSeq -- "dph-seq"
2080 | DPHThis -- the currently compiled package
2081 | DPHNone -- no DPH library available
2082 deriving(Eq, Ord, Enum, Show)
2084 setDPHBackend :: DPHBackend -> DynP ()
2085 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2087 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2089 dphPackageMaybe :: DynFlags -> Maybe PackageId
2090 dphPackageMaybe dflags
2091 = case dphBackend dflags of
2092 DPHPar -> Just dphParPackageId
2093 DPHSeq -> Just dphSeqPackageId
2094 DPHThis -> Just (thisPackage dflags)
2097 setMainIs :: String -> DynP ()
2099 | not (null main_fn) && isLower (head main_fn)
2100 -- The arg looked like "Foo.Bar.baz"
2101 = upd $ \d -> d{ mainFunIs = Just main_fn,
2102 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2104 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2105 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2107 | otherwise -- The arg looked like "baz"
2108 = upd $ \d -> d{ mainFunIs = Just arg }
2110 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2112 -----------------------------------------------------------------------------
2113 -- Paths & Libraries
2115 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2117 -- -i on its own deletes the import paths
2118 addImportPath "" = upd (\s -> s{importPaths = []})
2119 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2123 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2126 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2128 addFrameworkPath p =
2129 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2131 #ifndef mingw32_TARGET_OS
2132 split_marker :: Char
2133 split_marker = ':' -- not configurable (ToDo)
2136 splitPathList :: String -> [String]
2137 splitPathList s = filter notNull (splitUp s)
2138 -- empty paths are ignored: there might be a trailing
2139 -- ':' in the initial list, for example. Empty paths can
2140 -- cause confusion when they are translated into -I options
2141 -- for passing to gcc.
2143 #ifndef mingw32_TARGET_OS
2144 splitUp xs = split split_marker xs
2146 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2148 -- That is, if "foo:bar:baz" is used, this interpreted as
2149 -- consisting of three entries, 'foo', 'bar', 'baz'.
2150 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2151 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2153 -- Notice that no attempt is made to fully replace the 'standard'
2154 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2155 -- that this will cause too much breakage for users & ':' will
2156 -- work fine even with DOS paths, if you're not insisting on being silly.
2159 splitUp (x:':':div:xs) | div `elem` dir_markers
2160 = ((x:':':div:p): splitUp rs)
2162 (p,rs) = findNextPath xs
2163 -- we used to check for existence of the path here, but that
2164 -- required the IO monad to be threaded through the command-line
2165 -- parser which is quite inconvenient. The
2166 splitUp xs = cons p (splitUp rs)
2168 (p,rs) = findNextPath xs
2173 -- will be called either when we've consumed nought or the
2174 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2175 -- finding the next split marker.
2177 case break (`elem` split_markers) xs of
2178 (p, _:ds) -> (p, ds)
2181 split_markers :: [Char]
2182 split_markers = [':', ';']
2184 dir_markers :: [Char]
2185 dir_markers = ['/', '\\']
2188 -- -----------------------------------------------------------------------------
2189 -- tmpDir, where we store temporary files.
2191 setTmpDir :: FilePath -> DynFlags -> DynFlags
2192 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2193 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2194 -- seem necessary now --SDM 7/2/2008
2196 -----------------------------------------------------------------------------
2199 setRtsOpts :: String -> DynP ()
2200 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2202 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2203 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2205 -----------------------------------------------------------------------------
2208 setOptHpcDir :: String -> DynP ()
2209 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2211 -----------------------------------------------------------------------------
2212 -- Via-C compilation stuff
2214 -- There are some options that we need to pass to gcc when compiling
2215 -- Haskell code via C, but are only supported by recent versions of
2216 -- gcc. The configure script decides which of these options we need,
2217 -- and puts them in the "settings" file in $topdir. The advantage of
2218 -- having these in a separate file is that the file can be created at
2219 -- install-time depending on the available gcc version, and even
2220 -- re-generated later if gcc is upgraded.
2222 -- The options below are not dependent on the version of gcc, only the
2225 picCCOpts :: DynFlags -> [String]
2227 #if darwin_TARGET_OS
2228 -- Apple prefers to do things the other way round.
2229 -- PIC is on by default.
2230 -- -mdynamic-no-pic:
2231 -- Turn off PIC code generation.
2233 -- Don't generate "common" symbols - these are unwanted
2234 -- in dynamic libraries.
2237 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2239 = ["-mdynamic-no-pic"]
2240 #elif mingw32_TARGET_OS
2241 -- no -fPIC for Windows
2243 = ["-U __PIC__","-D__PIC__"]
2247 -- we need -fPIC for C files when we are compiling with -dynamic,
2248 -- otherwise things like stub.c files don't get compiled
2249 -- correctly. They need to reference data in the Haskell
2250 -- objects, but can't without -fPIC. See
2251 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2252 | opt_PIC || not opt_Static
2253 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2258 -- -----------------------------------------------------------------------------
2262 can_split = cSupportsSplitObjs == "YES"
2264 -- -----------------------------------------------------------------------------
2267 compilerInfo :: DynFlags -> [(String, String)]
2269 = -- We always make "Project name" be first to keep parsing in
2270 -- other languages simple, i.e. when looking for other fields,
2271 -- you don't have to worry whether there is a leading '[' or not
2272 ("Project name", cProjectName)
2273 -- Next come the settings, so anything else can be overridden
2274 -- in the settings file (as "lookup" uses the first match for the
2276 : rawSettings dflags
2277 ++ [("Project version", cProjectVersion),
2278 ("Booter version", cBooterVersion),
2280 ("Build platform", cBuildPlatformString),
2281 ("Host platform", cHostPlatformString),
2282 ("Target platform", cTargetPlatformString),
2283 ("Have interpreter", cGhcWithInterpreter),
2284 ("Object splitting supported", cSupportsSplitObjs),
2285 ("Have native code generator", cGhcWithNativeCodeGen),
2286 ("Support SMP", cGhcWithSMP),
2287 ("Unregisterised", cGhcUnregisterised),
2288 ("Tables next to code", cGhcEnableTablesNextToCode),
2289 ("RTS ways", cGhcRTSWays),
2290 ("Leading underscore", cLeadingUnderscore),
2291 ("Debug on", show debugIsOn),
2292 ("LibDir", topDir dflags),
2293 ("Global Package DB", systemPackageConfig dflags),
2294 ("Gcc Linker flags", show cGccLinkerOpts),
2295 ("Ld Linker flags", show cLdLinkerOpts)