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
16 HscTarget(..), isObjectTarget, defaultObjectTarget,
17 GhcMode(..), isOneShot,
18 GhcLink(..), isNoLink,
26 -- ** Manipulating DynFlags
27 defaultDynFlags, -- DynFlags
28 initDynFlags, -- DynFlags -> IO DynFlags
30 dopt, -- DynFlag -> DynFlags -> Bool
31 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
32 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
39 -- ** Parsing DynFlags
41 parseDynamicNoPackageFlags,
44 supportedLanguages, languageOptions,
46 -- ** DynFlag C compiler options
47 machdepCCOpts, picCCOpts,
49 -- * Configuration of the core-to-core passes
56 -- * Configuration of the stg-to-stg passes
60 -- * Compiler configuration suitable for display to the user
65 #include "HsVersions.h"
67 #ifndef OMIT_NATIVE_CODEGEN
72 import PrelNames ( mAIN )
74 import {-# SOURCE #-} Packages (PackageState)
75 import DriverPhases ( Phase(..), phaseInputExt )
78 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
80 import UniqFM ( UniqFM )
82 import Maybes ( orElse )
87 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
90 import Control.Monad ( when )
94 import System.FilePath
95 import System.IO ( stderr, hPutChar )
97 -- -----------------------------------------------------------------------------
100 -- | Enumerates the simple on-or-off dynamic flags
106 | Opt_D_dump_cmmz_pretty
110 | Opt_D_dump_asm_native
111 | Opt_D_dump_asm_liveness
112 | Opt_D_dump_asm_coalesce
113 | Opt_D_dump_asm_regalloc
114 | Opt_D_dump_asm_regalloc_stages
115 | Opt_D_dump_asm_conflicts
116 | Opt_D_dump_asm_stats
117 | Opt_D_dump_asm_expanded
123 | Opt_D_dump_inlinings
124 | Opt_D_dump_rule_firings
125 | Opt_D_dump_occur_anal
129 | Opt_D_dump_simpl_iterations
130 | Opt_D_dump_simpl_phases
139 | Opt_D_dump_worker_wrapper
140 | Opt_D_dump_rn_trace
141 | Opt_D_dump_rn_stats
143 | Opt_D_dump_simpl_stats
144 | Opt_D_dump_tc_trace
145 | Opt_D_dump_if_trace
152 | Opt_D_verbose_core2core
153 | Opt_D_verbose_stg2stg
155 | Opt_D_dump_hi_diffs
156 | Opt_D_dump_minimal_imports
157 | Opt_D_dump_mod_cycles
158 | Opt_D_dump_view_pattern_commoning
159 | Opt_D_faststring_stats
160 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
161 | Opt_D_no_debug_output
167 | Opt_WarnIsError -- -Werror; makes warnings fatal
168 | Opt_WarnDuplicateExports
170 | Opt_WarnImplicitPrelude
171 | Opt_WarnIncompletePatterns
172 | Opt_WarnIncompletePatternsRecUpd
173 | Opt_WarnMissingFields
174 | Opt_WarnMissingMethods
175 | Opt_WarnMissingSigs
176 | Opt_WarnNameShadowing
177 | Opt_WarnOverlappingPatterns
178 | Opt_WarnSimplePatterns
179 | Opt_WarnTypeDefaults
180 | Opt_WarnMonomorphism
181 | Opt_WarnUnusedBinds
182 | Opt_WarnUnusedImports
183 | Opt_WarnUnusedMatches
184 | Opt_WarnWarningsDeprecations
185 | Opt_WarnDeprecatedFlags
186 | Opt_WarnDodgyExports
187 | Opt_WarnDodgyImports
190 | Opt_WarnUnrecognisedPragmas
191 | Opt_WarnDodgyForeignImports
192 | Opt_WarnLazyUnliftedBindings
193 | Opt_WarnUnusedDoBind
194 | Opt_WarnWrongDoBind
198 | Opt_OverlappingInstances
199 | Opt_UndecidableInstances
200 | Opt_IncoherentInstances
201 | Opt_MonomorphismRestriction
204 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
205 | Opt_ForeignFunctionInterface
206 | Opt_UnliftedFFITypes
207 | Opt_GHCForeignImportPrim
208 | Opt_PArr -- Syntactic support for parallel arrays
209 | Opt_Arrows -- Arrow-notation syntax
210 | Opt_TemplateHaskell
213 | Opt_Generics -- "Derivable type classes"
214 | Opt_ImplicitPrelude
215 | Opt_ScopedTypeVariables
219 | Opt_OverloadedStrings
220 | Opt_DisambiguateRecordFields
221 | Opt_RecordWildCards
228 | Opt_StandaloneDeriving
229 | Opt_DeriveDataTypeable
231 | Opt_DeriveTraversable
234 | Opt_TypeSynonymInstances
235 | Opt_FlexibleContexts
236 | Opt_FlexibleInstances
237 | Opt_ConstrainedClassMethods
238 | Opt_MultiParamTypeClasses
239 | Opt_FunctionalDependencies
241 | Opt_PolymorphicComponents
242 | Opt_ExistentialQuantification
246 | Opt_ParallelListComp
247 | Opt_TransformListComp
248 | Opt_GeneralizedNewtypeDeriving
250 | Opt_PostfixOperators
253 | Opt_LiberalTypeSynonyms
256 | Opt_ImpredicativeTypes
259 | Opt_NewQualifiedOperators
261 | Opt_PrintExplicitForalls
266 | Opt_StaticArgumentTransformation
270 | Opt_IgnoreInterfacePragmas
271 | Opt_OmitInterfacePragmas
272 | Opt_DoLambdaEtaExpansion
276 | Opt_UnboxStrictFields
279 | Opt_InlineIfEnoughArgs
280 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
282 | Opt_RegsGraph -- do graph coloring register allocation
283 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
286 | Opt_AutoSccsOnAllToplevs
287 | Opt_AutoSccsOnExportedToplevs
288 | Opt_AutoSccsOnIndividualCafs
296 | Opt_ExcessPrecision
297 | Opt_EagerBlackHoling
298 | Opt_ReadUserPackageConf
302 | Opt_HideAllPackages
303 | Opt_PrintBindResult
307 | Opt_BreakOnException
309 | Opt_PrintEvldWithShow
310 | Opt_PrintBindContents
313 | Opt_EmitExternalCore
315 | Opt_BuildingCabalPackage
320 | Opt_ConvertToZipCfgAndBack
321 | Opt_AutoLinkPackages
322 | Opt_ImplicitImportQualified
331 | Opt_KeepRawTokenStream
335 -- | Contains not only a collection of 'DynFlag's but also a plethora of
336 -- information relating to the compilation of a single file or GHC session
337 data DynFlags = DynFlags {
340 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
341 stgToDo :: Maybe [StgToDo], -- similarly
342 hscTarget :: HscTarget,
343 hscOutName :: String, -- ^ Name of the output file
344 extCoreName :: String, -- ^ Name of the .hcr output file
345 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
346 optLevel :: Int, -- ^ Optimisation level
347 simplPhases :: Int, -- ^ Number of simplifier phases
348 maxSimplIterations :: Int, -- ^ Max simplifier iterations
349 shouldDumpSimplPhase :: SimplifierMode -> Bool,
350 ruleCheck :: Maybe String,
352 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
353 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
354 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
356 #ifndef OMIT_NATIVE_CODEGEN
357 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
359 stolen_x86_regs :: Int,
360 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
361 importPaths :: [FilePath],
363 mainFunIs :: Maybe String,
364 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
366 dphBackend :: DPHBackend,
368 thisPackage :: PackageId, -- ^ name of package currently being compiled
371 ways :: [Way], -- ^ Way flags from the command line
372 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
373 rtsBuildTag :: String, -- ^ The RTS \"way\"
375 -- For object splitting
376 splitInfo :: Maybe (String,Int),
379 objectDir :: Maybe String,
380 hiDir :: Maybe String,
381 stubDir :: Maybe String,
387 outputFile :: Maybe String,
388 outputHi :: Maybe String,
389 dynLibLoader :: DynLibLoader,
391 -- | This is set by 'DriverPipeline.runPipeline' based on where
392 -- its output is going.
393 dumpPrefix :: Maybe FilePath,
395 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
396 -- Set by @-ddump-file-prefix@
397 dumpPrefixForce :: Maybe FilePath,
399 includePaths :: [String],
400 libraryPaths :: [String],
401 frameworkPaths :: [String], -- used on darwin only
402 cmdlineFrameworks :: [String], -- ditto
403 tmpDir :: String, -- no trailing '/'
405 ghcUsagePath :: FilePath, -- Filled in by SysTools
406 ghciUsagePath :: FilePath, -- ditto
408 hpcDir :: String, -- ^ Path to store the .mix files
410 -- options for particular phases
418 opt_windres :: [String],
420 -- commands for particular phases
422 pgm_P :: (String,[Option]),
424 pgm_c :: (String,[Option]),
425 pgm_m :: (String,[Option]),
426 pgm_s :: (String,[Option]),
427 pgm_a :: (String,[Option]),
428 pgm_l :: (String,[Option]),
429 pgm_dll :: (String,[Option]),
431 pgm_sysman :: String,
432 pgm_windres :: String,
435 depMakefile :: FilePath,
436 depIncludePkgDeps :: Bool,
437 depExcludeMods :: [ModuleName],
438 depSuffixes :: [String],
441 extraPkgConfs :: [FilePath],
442 topDir :: FilePath, -- filled in by SysTools
443 systemPackageConfig :: FilePath, -- ditto
444 -- ^ The @-package-conf@ flags given on the command line, in the order
447 packageFlags :: [PackageFlag],
448 -- ^ The @-package@ and @-hide-package@ flags from the command-line
451 -- NB. do not modify this field, it is calculated by
452 -- Packages.initPackages and Packages.updatePackages.
453 pkgDatabase :: Maybe (UniqFM PackageConfig),
454 pkgState :: PackageState,
457 -- These have to be IORefs, because the defaultCleanupHandler needs to
458 -- know what to clean when an exception happens
459 filesToClean :: IORef [FilePath],
460 dirsToClean :: IORef (FiniteMap FilePath FilePath),
465 -- | Message output action: use "ErrUtils" instead of this if you can
466 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
468 haddockOptions :: Maybe String
471 wayNames :: DynFlags -> [WayName]
472 wayNames = map wayName . ways
474 -- | The target code type of the compilation (if any).
476 -- Whenever you change the target, also make sure to set 'ghcLink' to
477 -- something sensible.
479 -- 'HscNothing' can be used to avoid generating any output, however, note
482 -- * This will not run the desugaring step, thus no warnings generated in
483 -- this step will be output. In particular, this includes warnings related
484 -- to pattern matching. You can run the desugarer manually using
485 -- 'GHC.desugarModule'.
487 -- * If a program uses Template Haskell the typechecker may try to run code
488 -- from an imported module. This will fail if no code has been generated
489 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
490 -- whether this might be the case and choose to either switch to a
491 -- different target or avoid typechecking such modules. (The latter may
492 -- preferable for security reasons.)
495 = HscC -- ^ Generate C code.
496 | HscAsm -- ^ Generate assembly using the native code generator.
497 | HscJava -- ^ Generate Java bytecode.
498 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
499 | HscNothing -- ^ Don't generate any code. See notes above.
502 -- | Will this target result in an object file on the disk?
503 isObjectTarget :: HscTarget -> Bool
504 isObjectTarget HscC = True
505 isObjectTarget HscAsm = True
506 isObjectTarget _ = False
508 -- | The 'GhcMode' tells us whether we're doing multi-module
509 -- compilation (controlled via the "GHC" API) or one-shot
510 -- (single-module) compilation. This makes a difference primarily to
511 -- the "Finder": in one-shot mode we look for interface files for
512 -- imported modules, but in multi-module mode we look for source files
513 -- in order to check whether they need to be recompiled.
515 = CompManager -- ^ @\-\-make@, GHCi, etc.
516 | OneShot -- ^ @ghc -c Foo.hs@
517 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
520 instance Outputable GhcMode where
521 ppr CompManager = ptext (sLit "CompManager")
522 ppr OneShot = ptext (sLit "OneShot")
523 ppr MkDepend = ptext (sLit "MkDepend")
525 isOneShot :: GhcMode -> Bool
526 isOneShot OneShot = True
527 isOneShot _other = False
529 -- | What to do in the link step, if there is one.
531 = NoLink -- ^ Don't link at all
532 | LinkBinary -- ^ Link object code into a binary
533 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
534 -- bytecode and object code).
535 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
538 isNoLink :: GhcLink -> Bool
539 isNoLink NoLink = True
542 -- Is it worth evaluating this Bool and caching it in the DynFlags value
543 -- during initDynFlags?
544 doingTickyProfiling :: DynFlags -> Bool
545 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
548 = ExposePackage String
550 | IgnorePackage String
553 defaultHscTarget :: HscTarget
554 defaultHscTarget = defaultObjectTarget
556 -- | The 'HscTarget' value corresponding to the default way to create
557 -- object files on the current platform.
558 defaultObjectTarget :: HscTarget
560 | cGhcWithNativeCodeGen == "YES" = HscAsm
565 | Wrapped (Maybe String)
569 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
570 initDynFlags :: DynFlags -> IO DynFlags
571 initDynFlags dflags = do
572 -- someday these will be dynamic flags
573 ways <- readIORef v_Ways
574 refFilesToClean <- newIORef []
575 refDirsToClean <- newIORef emptyFM
578 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
579 rtsBuildTag = mkBuildTag ways,
580 filesToClean = refFilesToClean,
581 dirsToClean = refDirsToClean
584 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
585 -- and must be fully initialized by 'GHC.newSession' first.
586 defaultDynFlags :: DynFlags
589 ghcMode = CompManager,
590 ghcLink = LinkBinary,
593 hscTarget = defaultHscTarget,
599 maxSimplIterations = 4,
600 shouldDumpSimplPhase = const False,
602 specConstrThreshold = Just 200,
603 specConstrCount = Just 3,
604 liberateCaseThreshold = Just 200,
605 #ifndef OMIT_NATIVE_CODEGEN
606 targetPlatform = defaultTargetPlatform,
609 cmdlineHcIncludes = [],
613 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
617 thisPackage = mainPackageId,
623 objectSuf = phaseInputExt StopLn,
624 hcSuf = phaseInputExt HCc,
627 outputFile = Nothing,
629 dynLibLoader = SystemDependent,
630 dumpPrefix = Nothing,
631 dumpPrefixForce = Nothing,
635 cmdlineFrameworks = [],
636 tmpDir = cDEFAULT_TMPDIR,
642 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
653 pkgDatabase = Nothing,
654 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
655 ways = panic "defaultDynFlags: No ways",
656 buildTag = panic "defaultDynFlags: No buildTag",
657 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
659 -- initSysTools fills all these in
660 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
661 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
662 topDir = panic "defaultDynFlags: No topDir",
663 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
664 pgm_L = panic "defaultDynFlags: No pgm_L",
665 pgm_P = panic "defaultDynFlags: No pgm_P",
666 pgm_F = panic "defaultDynFlags: No pgm_F",
667 pgm_c = panic "defaultDynFlags: No pgm_c",
668 pgm_m = panic "defaultDynFlags: No pgm_m",
669 pgm_s = panic "defaultDynFlags: No pgm_s",
670 pgm_a = panic "defaultDynFlags: No pgm_a",
671 pgm_l = panic "defaultDynFlags: No pgm_l",
672 pgm_dll = panic "defaultDynFlags: No pgm_dll",
673 pgm_T = panic "defaultDynFlags: No pgm_T",
674 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
675 pgm_windres = panic "defaultDynFlags: No pgm_windres",
676 -- end of initSysTools values
678 depMakefile = "Makefile",
679 depIncludePkgDeps = False,
682 -- end of ghc -M values
683 filesToClean = panic "defaultDynFlags: No filesToClean",
684 dirsToClean = panic "defaultDynFlags: No dirsToClean",
685 haddockOptions = Nothing,
687 Opt_AutoLinkPackages,
688 Opt_ReadUserPackageConf,
690 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
691 -- behaviour the default, to see if anyone notices
695 Opt_MonomorphismRestriction,
706 Opt_PrintBindContents
708 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
709 -- The default -O0 options
712 log_action = \severity srcSpan style msg ->
714 SevInfo -> printErrs (msg style)
715 SevFatal -> printErrs (msg style)
718 printErrs ((mkLocMessage srcSpan msg) style)
719 -- careful (#2302): printErrs prints in UTF-8, whereas
720 -- converting to string first and using hPutStr would
721 -- just emit the low 8 bits of each unicode char.
728 0 | print errors & warnings only
729 1 | minimal verbosity: print "compiling M ... done." for each module.
730 2 | equivalent to -dshow-passes
731 3 | equivalent to existing "ghc -v"
732 4 | "ghc -v -ddump-most"
733 5 | "ghc -v -ddump-all"
736 -- | Test whether a 'DynFlag' is set
737 dopt :: DynFlag -> DynFlags -> Bool
738 dopt f dflags = f `elem` (flags dflags)
741 dopt_set :: DynFlags -> DynFlag -> DynFlags
742 dopt_set dfs f = dfs{ flags = f : flags dfs }
744 -- | Unset a 'DynFlag'
745 dopt_unset :: DynFlags -> DynFlag -> DynFlags
746 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
748 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
749 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
750 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
751 -> [a] -- ^ Correctly ordered extracted options
752 getOpts dflags opts = reverse (opts dflags)
753 -- We add to the options from the front, so we need to reverse the list
755 -- | Gets the verbosity flag for the current verbosity level. This is fed to
756 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
757 getVerbFlag :: DynFlags -> String
759 | verbosity dflags >= 3 = "-v"
762 setObjectDir, setHiDir, setStubDir, setOutputDir,
763 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
764 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
765 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
766 addCmdlineFramework, addHaddockOpts
767 :: String -> DynFlags -> DynFlags
768 setOutputFile, setOutputHi, setDumpPrefixForce
769 :: Maybe String -> DynFlags -> DynFlags
771 setObjectDir f d = d{ objectDir = Just f}
772 setHiDir f d = d{ hiDir = Just f}
773 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
774 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
775 -- \#included from the .hc file when compiling with -fvia-C.
776 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
778 setObjectSuf f d = d{ objectSuf = f}
779 setHiSuf f d = d{ hiSuf = f}
780 setHcSuf f d = d{ hcSuf = f}
782 setOutputFile f d = d{ outputFile = f}
783 setOutputHi f d = d{ outputHi = f}
785 parseDynLibLoaderMode f d =
787 ("deploy", "") -> d{ dynLibLoader = Deployable }
788 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
789 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
790 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
791 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
792 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
794 setDumpPrefixForce f d = d { dumpPrefixForce = f}
796 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
797 -- Config.hs should really use Option.
798 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
800 setPgmL f d = d{ pgm_L = f}
801 setPgmF f d = d{ pgm_F = f}
802 setPgmc f d = d{ pgm_c = (f,[])}
803 setPgmm f d = d{ pgm_m = (f,[])}
804 setPgms f d = d{ pgm_s = (f,[])}
805 setPgma f d = d{ pgm_a = (f,[])}
806 setPgml f d = d{ pgm_l = (f,[])}
807 setPgmdll f d = d{ pgm_dll = (f,[])}
808 setPgmwindres f d = d{ pgm_windres = f}
810 addOptL f d = d{ opt_L = f : opt_L d}
811 addOptP f d = d{ opt_P = f : opt_P d}
812 addOptF f d = d{ opt_F = f : opt_F d}
813 addOptc f d = d{ opt_c = f : opt_c d}
814 addOptm f d = d{ opt_m = f : opt_m d}
815 addOpta f d = d{ opt_a = f : opt_a d}
816 addOptl f d = d{ opt_l = f : opt_l d}
817 addOptwindres f d = d{ opt_windres = f : opt_windres d}
819 setDepMakefile :: FilePath -> DynFlags -> DynFlags
820 setDepMakefile f d = d { depMakefile = deOptDep f }
822 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
823 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
825 addDepExcludeMod :: String -> DynFlags -> DynFlags
827 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
829 addDepSuffix :: FilePath -> DynFlags -> DynFlags
830 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
833 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
834 -- we need to strip the "-optdep" off of the arg
835 deOptDep :: String -> String
836 deOptDep x = case stripPrefix "-optdep" x of
840 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
842 addHaddockOpts f d = d{ haddockOptions = Just f}
844 -- -----------------------------------------------------------------------------
845 -- Command-line options
847 -- | When invoking external tools as part of the compilation pipeline, we
848 -- pass these a sequence of options on the command-line. Rather than
849 -- just using a list of Strings, we use a type that allows us to distinguish
850 -- between filepaths and 'other stuff'. The reason for this is that
851 -- this type gives us a handle on transforming filenames, and filenames only,
852 -- to whatever format they're expected to be on a particular platform.
854 = FileOption -- an entry that _contains_ filename(s) / filepaths.
855 String -- a non-filepath prefix that shouldn't be
856 -- transformed (e.g., "/out=")
857 String -- the filepath/filename portion
860 showOpt :: Option -> String
861 showOpt (FileOption pre f) = pre ++ f
862 showOpt (Option s) = s
864 -----------------------------------------------------------------------------
865 -- Setting the optimisation level
867 updOptLevel :: Int -> DynFlags -> DynFlags
868 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
870 = dfs2{ optLevel = final_n }
872 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
873 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
874 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
876 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
877 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
879 optLevelFlags :: [([Int], DynFlag)]
881 = [ ([0], Opt_IgnoreInterfacePragmas)
882 , ([0], Opt_OmitInterfacePragmas)
884 , ([1,2], Opt_IgnoreAsserts)
885 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
887 , ([1,2], Opt_DoEtaReduction)
888 , ([1,2], Opt_CaseMerge)
889 , ([1,2], Opt_Strictness)
891 , ([1,2], Opt_FullLaziness)
893 , ([2], Opt_LiberateCase)
894 , ([2], Opt_SpecConstr)
896 -- , ([2], Opt_StaticArgumentTransformation)
897 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
898 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
899 -- several improvements to the heuristics, and I'm concerned that without
900 -- those changes SAT will interfere with some attempts to write "high
901 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
902 -- this year. In particular, the version in HEAD lacks the tail call
903 -- criterion, so many things that look like reasonable loops will be
904 -- turned into functions with extra (unneccesary) thunk creation.
906 , ([0,1,2], Opt_DoLambdaEtaExpansion)
907 -- This one is important for a tiresome reason:
908 -- we want to make sure that the bindings for data
909 -- constructors are eta-expanded. This is probably
910 -- a good thing anyway, but it seems fragile.
913 -- -----------------------------------------------------------------------------
914 -- Standard sets of warning options
916 standardWarnings :: [DynFlag]
918 = [ Opt_WarnWarningsDeprecations,
919 Opt_WarnDeprecatedFlags,
920 Opt_WarnUnrecognisedPragmas,
921 Opt_WarnOverlappingPatterns,
922 Opt_WarnMissingFields,
923 Opt_WarnMissingMethods,
924 Opt_WarnDuplicateExports,
925 Opt_WarnLazyUnliftedBindings,
926 Opt_WarnDodgyForeignImports,
930 minusWOpts :: [DynFlag]
932 = standardWarnings ++
933 [ Opt_WarnUnusedBinds,
934 Opt_WarnUnusedMatches,
935 Opt_WarnUnusedImports,
936 Opt_WarnIncompletePatterns,
937 Opt_WarnDodgyExports,
941 minusWallOpts :: [DynFlag]
944 [ Opt_WarnTypeDefaults,
945 Opt_WarnNameShadowing,
952 -- minuswRemovesOpts should be every warning option
953 minuswRemovesOpts :: [DynFlag]
956 [Opt_WarnImplicitPrelude,
957 Opt_WarnIncompletePatternsRecUpd,
958 Opt_WarnSimplePatterns,
959 Opt_WarnMonomorphism,
960 Opt_WarnUnrecognisedPragmas,
964 -- -----------------------------------------------------------------------------
965 -- CoreToDo: abstraction of core-to-core passes to run.
967 data CoreToDo -- These are diff core-to-core passes,
968 -- which may be invoked in any order,
969 -- as many times as you like.
971 = CoreDoSimplify -- The core-to-core simplifier.
974 -- Each run of the simplifier can take a different
975 -- set of simplifier-specific flags.
977 | CoreDoFloatOutwards FloatOutSwitches
982 | CoreDoWorkerWrapper
985 | CoreDoOldStrictness
988 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
989 -- matching this string
990 | CoreDoVectorisation PackageId
991 | CoreDoNothing -- Useful when building up
992 | CoreDoPasses [CoreToDo] -- lists of these things
995 data SimplifierMode -- See comments in SimplMonad
997 | SimplPhase Int [String]
999 instance Outputable SimplifierMode where
1000 ppr SimplGently = ptext (sLit "gentle")
1001 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1004 data SimplifierSwitch
1005 = MaxSimplifierIterations Int
1009 data FloatOutSwitches = FloatOutSwitches {
1010 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1011 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1012 -- even if they do not escape a lambda
1015 instance Outputable FloatOutSwitches where
1016 ppr = pprFloatOutSwitches
1018 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1019 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1020 <+> pp_not (floatOutConstants sw) <+> text "constants"
1023 pp_not False = text "not"
1025 -- | Switches that specify the minimum amount of floating out
1026 -- gentleFloatOutSwitches :: FloatOutSwitches
1027 -- gentleFloatOutSwitches = FloatOutSwitches False False
1029 -- | Switches that do not specify floating out of lambdas, just of constants
1030 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1031 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1034 -- The core-to-core pass ordering is derived from the DynFlags:
1035 runWhen :: Bool -> CoreToDo -> CoreToDo
1036 runWhen True do_this = do_this
1037 runWhen False _ = CoreDoNothing
1039 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1040 runMaybe (Just x) f = f x
1041 runMaybe Nothing _ = CoreDoNothing
1043 getCoreToDo :: DynFlags -> [CoreToDo]
1045 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1046 | otherwise = core_todo
1048 opt_level = optLevel dflags
1049 phases = simplPhases dflags
1050 max_iter = maxSimplIterations dflags
1051 strictness = dopt Opt_Strictness dflags
1052 full_laziness = dopt Opt_FullLaziness dflags
1053 cse = dopt Opt_CSE dflags
1054 spec_constr = dopt Opt_SpecConstr dflags
1055 liberate_case = dopt Opt_LiberateCase dflags
1056 rule_check = ruleCheck dflags
1057 static_args = dopt Opt_StaticArgumentTransformation dflags
1059 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1061 simpl_phase phase names iter
1063 [ CoreDoSimplify (SimplPhase phase names) [
1064 MaxSimplifierIterations iter
1066 maybe_rule_check phase
1070 = runWhen (dopt Opt_Vectorise dflags)
1071 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1074 -- By default, we have 2 phases before phase 0.
1076 -- Want to run with inline phase 2 after the specialiser to give
1077 -- maximum chance for fusion to work before we inline build/augment
1078 -- in phase 1. This made a difference in 'ansi' where an
1079 -- overloaded function wasn't inlined till too late.
1081 -- Need phase 1 so that build/augment get
1082 -- inlined. I found that spectral/hartel/genfft lost some useful
1083 -- strictness in the function sumcode' if augment is not inlined
1084 -- before strictness analysis runs
1085 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1086 | phase <- [phases, phases-1 .. 1] ]
1089 -- initial simplify: mk specialiser happy: minimum effort please
1090 simpl_gently = CoreDoSimplify SimplGently [
1091 -- Simplify "gently"
1092 -- Don't inline anything till full laziness has bitten
1093 -- In particular, inlining wrappers inhibits floating
1094 -- e.g. ...(case f x of ...)...
1095 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1096 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1097 -- and now the redex (f x) isn't floatable any more
1098 -- Similarly, don't apply any rules until after full
1099 -- laziness. Notably, list fusion can prevent floating.
1101 NoCaseOfCase, -- Don't do case-of-case transformations.
1102 -- This makes full laziness work better
1103 MaxSimplifierIterations max_iter
1107 if opt_level == 0 then
1109 simpl_phase 0 ["final"] max_iter]
1110 else {- opt_level >= 1 -} [
1112 -- We want to do the static argument transform before full laziness as it
1113 -- may expose extra opportunities to float things outwards. However, to fix
1114 -- up the output of the transformation we need at do at least one simplify
1115 -- after this before anything else
1116 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1118 -- We run vectorisation here for now, but we might also try to run
1122 -- initial simplify: mk specialiser happy: minimum effort please
1125 -- Specialisation is best done before full laziness
1126 -- so that overloaded functions have all their dictionary lambdas manifest
1129 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1130 -- Was: gentleFloatOutSwitches
1131 -- I have no idea why, but not floating constants to top level is
1132 -- very bad in some cases.
1133 -- Notably: p_ident in spectral/rewrite
1134 -- Changing from "gentle" to "constantsOnly" improved
1135 -- rewrite's allocation by 19%, and made 0.0% difference
1136 -- to any other nofib benchmark
1142 -- Phase 0: allow all Ids to be inlined now
1143 -- This gets foldr inlined before strictness analysis
1145 -- At least 3 iterations because otherwise we land up with
1146 -- huge dead expressions because of an infelicity in the
1148 -- let k = BIG in foldr k z xs
1149 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1150 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1152 simpl_phase 0 ["main"] (max max_iter 3),
1155 #ifdef OLD_STRICTNESS
1156 CoreDoOldStrictness,
1158 runWhen strictness (CoreDoPasses [
1160 CoreDoWorkerWrapper,
1162 simpl_phase 0 ["post-worker-wrapper"] max_iter
1165 runWhen full_laziness
1166 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1167 -- nofib/spectral/hartel/wang doubles in speed if you
1168 -- do full laziness late in the day. It only happens
1169 -- after fusion and other stuff, so the early pass doesn't
1170 -- catch it. For the record, the redex is
1171 -- f_el22 (f_el21 r_midblock)
1174 runWhen cse CoreCSE,
1175 -- We want CSE to follow the final full-laziness pass, because it may
1176 -- succeed in commoning up things floated out by full laziness.
1177 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1183 -- Case-liberation for -O2. This should be after
1184 -- strictness analysis and the simplification which follows it.
1185 runWhen liberate_case (CoreDoPasses [
1187 simpl_phase 0 ["post-liberate-case"] max_iter
1188 ]), -- Run the simplifier after LiberateCase to vastly
1189 -- reduce the possiblility of shadowing
1190 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1192 runWhen spec_constr CoreDoSpecConstr,
1196 -- Final clean-up simplification:
1197 simpl_phase 0 ["final"] max_iter
1200 -- -----------------------------------------------------------------------------
1201 -- StgToDo: abstraction of stg-to-stg passes to run.
1204 = StgDoMassageForProfiling -- should be (next to) last
1205 -- There's also setStgVarInfo, but its absolute "lastness"
1206 -- is so critical that it is hardwired in (no flag).
1209 getStgToDo :: DynFlags -> [StgToDo]
1211 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1214 stg_stats = dopt Opt_StgStats dflags
1216 todo1 = if stg_stats then [D_stg_stats] else []
1218 todo2 | WayProf `elem` wayNames dflags
1219 = StgDoMassageForProfiling : todo1
1223 -- -----------------------------------------------------------------------------
1226 allFlags :: [String]
1227 allFlags = map ('-':) $
1228 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1229 map ("fno-"++) flags ++
1230 map ("f"++) flags ++
1231 map ("X"++) supportedLanguages ++
1232 map ("XNo"++) supportedLanguages
1233 where ok (PrefixPred _ _) = False
1235 flags = [ name | (name, _, _) <- fFlags ]
1237 dynamic_flags :: [Flag DynP]
1239 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1240 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1241 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1242 , Flag "#include" (HasArg (addCmdlineHCInclude))
1243 (Deprecated "No longer has any effect")
1244 , Flag "v" (OptIntSuffix setVerbosity) Supported
1246 ------- Specific phases --------------------------------------------
1247 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1248 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1249 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1250 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1251 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1252 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1253 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1254 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1255 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1256 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1258 , Flag "optL" (HasArg (upd . addOptL)) Supported
1259 , Flag "optP" (HasArg (upd . addOptP)) Supported
1260 , Flag "optF" (HasArg (upd . addOptF)) Supported
1261 , Flag "optc" (HasArg (upd . addOptc)) Supported
1262 , Flag "optm" (HasArg (upd . addOptm)) Supported
1263 , Flag "opta" (HasArg (upd . addOpta)) Supported
1264 , Flag "optl" (HasArg (upd . addOptl)) Supported
1265 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1268 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1271 -------- ghc -M -----------------------------------------------------
1272 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1273 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1274 (Deprecated "Use -dep-suffix instead")
1275 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1276 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1277 (Deprecated "Use -dep-makefile instead")
1278 , Flag "optdep-w" (NoArg (return ()))
1279 (Deprecated "-optdep-w doesn't do anything")
1280 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1281 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1282 (Deprecated "Use -include-pkg-deps instead")
1283 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1284 (Deprecated "Use -include-pkg-deps instead")
1285 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1286 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1287 (Deprecated "Use -exclude-module instead")
1288 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1289 (Deprecated "Use -exclude-module instead")
1291 -------- Linking ----------------------------------------------------
1292 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1294 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1295 (Deprecated "Use -c instead")
1296 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1298 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1301 ------- Libraries ---------------------------------------------------
1302 , Flag "L" (Prefix addLibraryPath ) Supported
1303 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1305 ------- Frameworks --------------------------------------------------
1306 -- -framework-path should really be -F ...
1307 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1308 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1310 ------- Output Redirection ------------------------------------------
1311 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1312 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1313 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1314 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1315 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1316 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1317 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1318 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1319 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1320 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1321 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1324 ------- Keeping temporary files -------------------------------------
1325 -- These can be singular (think ghc -c) or plural (think ghc --make)
1326 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1327 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1328 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1329 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1330 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1331 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1332 -- This only makes sense as plural
1333 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1335 ------- Miscellaneous ----------------------------------------------
1336 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1337 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1338 , Flag "main-is" (SepArg setMainIs ) Supported
1339 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1340 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1341 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1343 ------- recompilation checker --------------------------------------
1344 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1345 (Deprecated "Use -fno-force-recomp instead")
1346 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1347 (Deprecated "Use -fforce-recomp instead")
1349 ------ HsCpp opts ---------------------------------------------------
1350 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1351 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1353 ------- Include/Import Paths ----------------------------------------
1354 , Flag "I" (Prefix addIncludePath) Supported
1355 , Flag "i" (OptPrefix addImportPath ) Supported
1357 ------ Debugging ----------------------------------------------------
1358 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1360 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1362 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1364 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1366 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1368 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1370 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1372 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1374 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1376 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1378 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1380 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1382 , Flag "ddump-asm-regalloc-stages"
1383 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1385 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1387 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1389 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1391 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1393 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1395 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1397 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1399 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1401 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1403 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1405 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1407 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1409 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1411 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1413 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1415 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1417 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1419 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1421 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1423 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1425 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1427 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1429 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1431 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1433 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1435 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1437 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1439 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1441 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1443 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1445 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1447 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1449 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1451 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1453 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1455 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1457 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1459 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1461 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1463 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1465 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1467 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1469 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1471 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1474 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1476 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1478 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1480 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1482 , Flag "dshow-passes"
1483 (NoArg (do forceRecompile
1484 setVerbosity (Just 2)))
1486 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1489 ------ Machine dependant (-m<blah>) stuff ---------------------------
1491 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1493 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1495 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1498 ------ Warning opts -------------------------------------------------
1499 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1501 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1503 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1505 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1507 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1508 (Deprecated "Use -w instead")
1509 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1512 ------ Optimisation flags ------------------------------------------
1513 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1514 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1515 (Deprecated "Use -O0 instead")
1516 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1517 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1519 -- If the number is missing, use 1
1521 , Flag "fsimplifier-phases"
1522 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1524 , Flag "fmax-simplifier-iterations"
1525 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1528 , Flag "fspec-constr-threshold"
1529 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1531 , Flag "fno-spec-constr-threshold"
1532 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1534 , Flag "fspec-constr-count"
1535 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1537 , Flag "fno-spec-constr-count"
1538 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1540 , Flag "fliberate-case-threshold"
1541 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1543 , Flag "fno-liberate-case-threshold"
1544 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1547 , Flag "frule-check"
1548 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1550 , Flag "fcontext-stack"
1551 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1554 ------ Profiling ----------------------------------------------------
1556 -- XXX Should the -f* flags be deprecated?
1557 -- They don't seem to be documented
1558 , Flag "fauto-sccs-on-all-toplevs"
1559 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1562 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1564 , Flag "no-auto-all"
1565 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1567 , Flag "fauto-sccs-on-exported-toplevs"
1568 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1571 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1574 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1576 , Flag "fauto-sccs-on-individual-cafs"
1577 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1580 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1583 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1586 ------ DPH flags ----------------------------------------------------
1589 (NoArg (setDPHBackend DPHSeq))
1592 (NoArg (setDPHBackend DPHPar))
1595 (NoArg (setDPHBackend DPHThis))
1598 ------ Compiler flags -----------------------------------------------
1600 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1601 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1602 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1604 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1605 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1606 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1608 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1610 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1613 ++ map (mkFlag True "f" setDynFlag ) fFlags
1614 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1615 ++ map (mkFlag True "X" setDynFlag ) xFlags
1616 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1618 package_flags :: [Flag DynP]
1620 ------- Packages ----------------------------------------------------
1621 Flag "package-conf" (HasArg extraPkgConf_) Supported
1622 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1624 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1625 , Flag "package" (HasArg exposePackage) Supported
1626 , Flag "hide-package" (HasArg hidePackage) Supported
1627 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1629 , Flag "ignore-package" (HasArg ignorePackage)
1631 , Flag "syslib" (HasArg exposePackage)
1632 (Deprecated "Use -package instead")
1635 mkFlag :: Bool -- ^ True <=> it should be turned on
1636 -> String -- ^ The flag prefix
1637 -> (DynFlag -> DynP ())
1638 -> (String, DynFlag, Bool -> Deprecated)
1640 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1641 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1643 deprecatedForLanguage :: String -> Bool -> Deprecated
1644 deprecatedForLanguage lang turn_on
1645 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1647 flag | turn_on = lang
1648 | otherwise = "No"++lang
1650 useInstead :: String -> Bool -> Deprecated
1651 useInstead flag turn_on
1652 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1654 no = if turn_on then "" else "no-"
1656 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1657 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1659 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1660 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1661 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1662 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1663 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1664 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1665 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1666 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1667 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1668 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1669 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1670 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1671 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1672 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1673 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1674 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1675 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1676 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1677 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1678 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1679 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1680 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1681 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1682 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1683 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1684 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1685 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1686 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1687 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1688 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1689 ( "strictness", Opt_Strictness, const Supported ),
1690 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1691 ( "full-laziness", Opt_FullLaziness, const Supported ),
1692 ( "liberate-case", Opt_LiberateCase, const Supported ),
1693 ( "spec-constr", Opt_SpecConstr, const Supported ),
1694 ( "cse", Opt_CSE, const Supported ),
1695 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1696 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1697 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1698 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1699 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1700 ( "case-merge", Opt_CaseMerge, const Supported ),
1701 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1702 ( "method-sharing", Opt_MethodSharing, const Supported ),
1703 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1704 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1705 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1706 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1707 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1708 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1709 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1710 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1711 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1712 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1713 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1714 ( "break-on-error", Opt_BreakOnError, const Supported ),
1715 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1716 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1717 ( "run-cps", Opt_RunCPS, const Supported ),
1718 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1719 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1720 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1721 ( "vectorise", Opt_Vectorise, const Supported ),
1722 ( "regs-graph", Opt_RegsGraph, const Supported ),
1723 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1724 ( "th", Opt_TemplateHaskell,
1725 deprecatedForLanguage "TemplateHaskell" ),
1726 ( "fi", Opt_ForeignFunctionInterface,
1727 deprecatedForLanguage "ForeignFunctionInterface" ),
1728 ( "ffi", Opt_ForeignFunctionInterface,
1729 deprecatedForLanguage "ForeignFunctionInterface" ),
1730 ( "arrows", Opt_Arrows,
1731 deprecatedForLanguage "Arrows" ),
1732 ( "generics", Opt_Generics,
1733 deprecatedForLanguage "Generics" ),
1734 ( "implicit-prelude", Opt_ImplicitPrelude,
1735 deprecatedForLanguage "ImplicitPrelude" ),
1736 ( "bang-patterns", Opt_BangPatterns,
1737 deprecatedForLanguage "BangPatterns" ),
1738 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1739 deprecatedForLanguage "MonomorphismRestriction" ),
1740 ( "mono-pat-binds", Opt_MonoPatBinds,
1741 deprecatedForLanguage "MonoPatBinds" ),
1742 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1743 deprecatedForLanguage "ExtendedDefaultRules" ),
1744 ( "implicit-params", Opt_ImplicitParams,
1745 deprecatedForLanguage "ImplicitParams" ),
1746 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1747 deprecatedForLanguage "ScopedTypeVariables" ),
1749 deprecatedForLanguage "PArr" ),
1750 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1751 deprecatedForLanguage "OverlappingInstances" ),
1752 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1753 deprecatedForLanguage "UndecidableInstances" ),
1754 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1755 deprecatedForLanguage "IncoherentInstances" ),
1756 ( "gen-manifest", Opt_GenManifest, const Supported ),
1757 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1758 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1759 ( "shared-implib", Opt_SharedImplib, const Supported ),
1760 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1761 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1764 supportedLanguages :: [String]
1765 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1767 -- This may contain duplicates
1768 languageOptions :: [DynFlag]
1769 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1771 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1772 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1774 ( "CPP", Opt_Cpp, const Supported ),
1775 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1776 ( "TupleSections", Opt_TupleSections, const Supported ),
1777 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1778 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1779 ( "MagicHash", Opt_MagicHash, const Supported ),
1780 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1781 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1782 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1783 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1784 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1785 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1786 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1787 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1788 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1789 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1790 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1791 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1792 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1793 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1794 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1795 ( "Arrows", Opt_Arrows, const Supported ),
1796 ( "PArr", Opt_PArr, const Supported ),
1797 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1798 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1799 ( "Generics", Opt_Generics, const Supported ),
1801 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1802 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1803 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1804 ( "RecordPuns", Opt_RecordPuns,
1805 deprecatedForLanguage "NamedFieldPuns" ),
1806 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1807 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1808 ( "GADTs", Opt_GADTs, const Supported ),
1809 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1810 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1811 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1813 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1815 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1816 -- On by default (which is not strictly H98):
1817 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1818 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1819 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1820 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1821 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1822 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1824 ( "PatternSignatures", Opt_ScopedTypeVariables,
1825 deprecatedForLanguage "ScopedTypeVariables" ),
1827 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1828 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1829 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1830 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1831 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1832 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1833 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1834 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1835 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1836 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1837 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1838 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1839 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1840 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1841 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1842 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1843 ( "PackageImports", Opt_PackageImports, const Supported ),
1844 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1847 impliedFlags :: [(DynFlag, DynFlag)]
1849 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1850 -- be completely rigid for GADTs
1852 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1853 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1854 -- all over the place
1856 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1857 -- Note [Scoped tyvars] in TcBinds
1858 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1860 -- Record wild-cards implies field disambiguation
1861 -- Otherwise if you write (C {..}) you may well get
1862 -- stuff like " 'a' not in scope ", which is a bit silly
1863 -- if the compiler has just filled in field 'a' of constructor 'C'
1864 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1867 glasgowExtsFlags :: [DynFlag]
1868 glasgowExtsFlags = [
1869 Opt_PrintExplicitForalls
1870 , Opt_ForeignFunctionInterface
1871 , Opt_UnliftedFFITypes
1873 , Opt_ImplicitParams
1874 , Opt_ScopedTypeVariables
1876 , Opt_TypeSynonymInstances
1877 , Opt_StandaloneDeriving
1878 , Opt_DeriveDataTypeable
1880 , Opt_DeriveFoldable
1881 , Opt_DeriveTraversable
1882 , Opt_FlexibleContexts
1883 , Opt_FlexibleInstances
1884 , Opt_ConstrainedClassMethods
1885 , Opt_MultiParamTypeClasses
1886 , Opt_FunctionalDependencies
1888 , Opt_PolymorphicComponents
1889 , Opt_ExistentialQuantification
1891 , Opt_PostfixOperators
1893 , Opt_LiberalTypeSynonyms
1897 , Opt_ParallelListComp
1898 , Opt_EmptyDataDecls
1899 , Opt_KindSignatures
1900 , Opt_GeneralizedNewtypeDeriving
1901 , Opt_TypeFamilies ]
1903 -- -----------------------------------------------------------------------------
1904 -- Parsing the dynamic flags.
1906 -- | Parse dynamic flags from a list of command line arguments. Returns the
1907 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1908 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1909 -- flags or missing arguments).
1910 parseDynamicFlags :: Monad m =>
1911 DynFlags -> [Located String]
1912 -> m (DynFlags, [Located String], [Located String])
1913 -- ^ Updated 'DynFlags', left-over arguments, and
1914 -- list of warnings.
1915 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1917 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1918 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1919 parseDynamicNoPackageFlags :: Monad m =>
1920 DynFlags -> [Located String]
1921 -> m (DynFlags, [Located String], [Located String])
1922 -- ^ Updated 'DynFlags', left-over arguments, and
1923 -- list of warnings.
1924 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1926 parseDynamicFlags_ :: Monad m =>
1927 DynFlags -> [Located String] -> Bool
1928 -> m (DynFlags, [Located String], [Located String])
1929 parseDynamicFlags_ dflags0 args pkg_flags = do
1930 -- XXX Legacy support code
1931 -- We used to accept things like
1932 -- optdep-f -optdepdepend
1933 -- optdep-f -optdep depend
1934 -- optdep -f -optdepdepend
1935 -- optdep -f -optdep depend
1936 -- but the spaces trip up proper argument handling. So get rid of them.
1937 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1938 f (x : xs) = x : f xs
1942 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1943 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1944 | otherwise = dynamic_flags
1946 let ((leftover, errs, warns), dflags1)
1947 = runCmdLine (processArgs flag_spec args') dflags0
1948 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1950 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1951 -- isn't up to the job. We know that if hscTarget == HscC, then the
1952 -- user has explicitly used -fvia-C, because -fasm is the default,
1953 -- unless there is no NCG on this platform. The latter case is
1954 -- checked when the -fPIC flag is parsed.
1956 let (pic_warns, dflags2) =
1957 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1958 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1959 dflags1{ hscTarget = HscAsm })
1962 return (dflags2, leftover, pic_warns ++ warns)
1964 type DynP = CmdLineP DynFlags
1966 upd :: (DynFlags -> DynFlags) -> DynP ()
1968 dfs <- getCmdLineState
1969 putCmdLineState $! (f dfs)
1971 --------------------------
1972 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1973 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1974 ; mapM_ setDynFlag deps }
1976 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1977 -- When you set f, set the ones it implies
1978 -- NB: use setDynFlag recursively, in case the implied flags
1979 -- implies further flags
1980 -- When you un-set f, however, we don't un-set the things it implies
1981 -- (except for -fno-glasgow-exts, which is treated specially)
1983 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1985 --------------------------
1986 setDumpFlag :: DynFlag -> OptKind DynP
1987 setDumpFlag dump_flag
1988 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1990 -- Certain dumpy-things are really interested in what's going
1991 -- on during recompilation checking, so in those cases we
1992 -- don't want to turn it off.
1993 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1994 Opt_D_dump_hi_diffs]
1996 forceRecompile :: DynP ()
1997 -- Whenver we -ddump, force recompilation (by switching off the
1998 -- recompilation checker), else you don't see the dump! However,
1999 -- don't switch it off in --make mode, else *everything* gets
2000 -- recompiled which probably isn't what you want
2001 forceRecompile = do { dfs <- getCmdLineState
2002 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2004 force_recomp dfs = isOneShot (ghcMode dfs)
2006 setVerboseCore2Core :: DynP ()
2007 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
2009 upd (\s -> s { shouldDumpSimplPhase = const True })
2011 setDumpSimplPhases :: String -> DynP ()
2012 setDumpSimplPhases s = do forceRecompile
2013 upd (\s -> s { shouldDumpSimplPhase = spec })
2015 spec :: SimplifierMode -> Bool
2017 . map (join (&&) . map match . split ':')
2023 join :: (Bool -> Bool -> Bool)
2024 -> [SimplifierMode -> Bool]
2025 -> SimplifierMode -> Bool
2026 join _ [] = const True
2027 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2029 match :: String -> SimplifierMode -> Bool
2030 match "" = const True
2031 match s = case reads s of
2032 [(n,"")] -> phase_num n
2035 phase_num :: Int -> SimplifierMode -> Bool
2036 phase_num n (SimplPhase k _) = n == k
2037 phase_num _ _ = False
2039 phase_name :: String -> SimplifierMode -> Bool
2040 phase_name s SimplGently = s == "gentle"
2041 phase_name s (SimplPhase _ ss) = s `elem` ss
2043 setVerbosity :: Maybe Int -> DynP ()
2044 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2046 addCmdlineHCInclude :: String -> DynP ()
2047 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2049 extraPkgConf_ :: FilePath -> DynP ()
2050 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2052 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2054 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2056 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2058 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2060 setPackageName :: String -> DynFlags -> DynFlags
2061 setPackageName p s = s{ thisPackage = stringToPackageId p }
2063 -- If we're linking a binary, then only targets that produce object
2064 -- code are allowed (requests for other target types are ignored).
2065 setTarget :: HscTarget -> DynP ()
2066 setTarget l = upd set
2069 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2072 -- Changes the target only if we're compiling object code. This is
2073 -- used by -fasm and -fvia-C, which switch from one to the other, but
2074 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2075 -- can be safely used in an OPTIONS_GHC pragma.
2076 setObjTarget :: HscTarget -> DynP ()
2077 setObjTarget l = upd set
2080 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2083 setOptLevel :: Int -> DynFlags -> DynFlags
2084 setOptLevel n dflags
2085 | hscTarget dflags == HscInterpreted && n > 0
2087 -- not in IO any more, oh well:
2088 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2090 = updOptLevel n dflags
2093 -- -Odph is equivalent to
2095 -- -O2 optimise as much as possible
2096 -- -fno-method-sharing sharing specialisation defeats fusion
2098 -- -fdicts-cheap always inline dictionaries
2099 -- -fmax-simplifier-iterations20 this is necessary sometimes
2100 -- -fsimplifier-phases=3 we use an additional simplifier phase
2102 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2103 -- -fno-spec-constr-count SpecConstr as much as possible
2104 -- -finline-enough-args hack to prevent excessive inlining
2106 setDPHOpt :: DynFlags -> DynFlags
2107 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2109 , specConstrThreshold = Nothing
2110 , specConstrCount = Nothing
2112 `dopt_set` Opt_DictsCheap
2113 `dopt_unset` Opt_MethodSharing
2114 `dopt_set` Opt_InlineIfEnoughArgs
2116 data DPHBackend = DPHPar
2119 deriving(Eq, Ord, Enum, Show)
2121 setDPHBackend :: DPHBackend -> DynP ()
2122 setDPHBackend backend
2124 upd $ \dflags -> dflags { dphBackend = backend }
2125 mapM_ exposePackage (dph_packages backend)
2127 dph_packages DPHThis = []
2128 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2129 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2131 dphPackage :: DynFlags -> PackageId
2132 dphPackage dflags = case dphBackend dflags of
2133 DPHPar -> dphParPackageId
2134 DPHSeq -> dphSeqPackageId
2135 DPHThis -> thisPackage dflags
2137 setMainIs :: String -> DynP ()
2139 | not (null main_fn) && isLower (head main_fn)
2140 -- The arg looked like "Foo.Bar.baz"
2141 = upd $ \d -> d{ mainFunIs = Just main_fn,
2142 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2144 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2145 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2147 | otherwise -- The arg looked like "baz"
2148 = upd $ \d -> d{ mainFunIs = Just arg }
2150 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2152 -----------------------------------------------------------------------------
2153 -- Paths & Libraries
2155 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2157 -- -i on its own deletes the import paths
2158 addImportPath "" = upd (\s -> s{importPaths = []})
2159 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2163 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2166 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2168 addFrameworkPath p =
2169 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2171 #ifndef mingw32_TARGET_OS
2172 split_marker :: Char
2173 split_marker = ':' -- not configurable (ToDo)
2176 splitPathList :: String -> [String]
2177 splitPathList s = filter notNull (splitUp s)
2178 -- empty paths are ignored: there might be a trailing
2179 -- ':' in the initial list, for example. Empty paths can
2180 -- cause confusion when they are translated into -I options
2181 -- for passing to gcc.
2183 #ifndef mingw32_TARGET_OS
2184 splitUp xs = split split_marker xs
2186 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2188 -- That is, if "foo:bar:baz" is used, this interpreted as
2189 -- consisting of three entries, 'foo', 'bar', 'baz'.
2190 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2191 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2193 -- Notice that no attempt is made to fully replace the 'standard'
2194 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2195 -- that this will cause too much breakage for users & ':' will
2196 -- work fine even with DOS paths, if you're not insisting on being silly.
2199 splitUp (x:':':div:xs) | div `elem` dir_markers
2200 = ((x:':':div:p): splitUp rs)
2202 (p,rs) = findNextPath xs
2203 -- we used to check for existence of the path here, but that
2204 -- required the IO monad to be threaded through the command-line
2205 -- parser which is quite inconvenient. The
2206 splitUp xs = cons p (splitUp rs)
2208 (p,rs) = findNextPath xs
2213 -- will be called either when we've consumed nought or the
2214 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2215 -- finding the next split marker.
2217 case break (`elem` split_markers) xs of
2218 (p, _:ds) -> (p, ds)
2221 split_markers :: [Char]
2222 split_markers = [':', ';']
2224 dir_markers :: [Char]
2225 dir_markers = ['/', '\\']
2228 -- -----------------------------------------------------------------------------
2229 -- tmpDir, where we store temporary files.
2231 setTmpDir :: FilePath -> DynFlags -> DynFlags
2232 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2233 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2234 -- seem necessary now --SDM 7/2/2008
2236 -----------------------------------------------------------------------------
2239 setOptHpcDir :: String -> DynP ()
2240 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2242 -----------------------------------------------------------------------------
2243 -- Via-C compilation stuff
2245 -- There are some options that we need to pass to gcc when compiling
2246 -- Haskell code via C, but are only supported by recent versions of
2247 -- gcc. The configure script decides which of these options we need,
2248 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2249 -- read before each via-C compilation. The advantage of having these
2250 -- in a separate file is that the file can be created at install-time
2251 -- depending on the available gcc version, and even re-generated later
2252 -- if gcc is upgraded.
2254 -- The options below are not dependent on the version of gcc, only the
2257 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2258 [String]) -- for registerised HC compilations
2259 machdepCCOpts _dflags
2260 #if alpha_TARGET_ARCH
2262 #ifdef HAVE_THREADED_RTS_SUPPORT
2266 -- For now, to suppress the gcc warning "call-clobbered
2267 -- register used for global register variable", we simply
2268 -- disable all warnings altogether using the -w flag. Oh well.
2270 #elif hppa_TARGET_ARCH
2271 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2272 -- (very nice, but too bad the HP /usr/include files don't agree.)
2273 = ( ["-D_HPUX_SOURCE"], [] )
2275 #elif m68k_TARGET_ARCH
2276 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2277 -- popping of args to routines to be explicit; if we let things
2278 -- be deferred 'til after an STGJUMP, imminent death is certain!
2280 -- -fomit-frame-pointer : *don't*
2281 -- It's better to have a6 completely tied up being a frame pointer
2282 -- rather than let GCC pick random things to do with it.
2283 -- (If we want to steal a6, then we would try to do things
2284 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2285 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2287 #elif i386_TARGET_ARCH
2288 -- -fno-defer-pop : basically the same game as for m68k
2290 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2291 -- the fp (%ebp) for our register maps.
2292 = let n_regs = stolen_x86_regs _dflags
2295 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2298 "-fomit-frame-pointer",
2299 -- we want -fno-builtin, because when gcc inlines
2300 -- built-in functions like memcpy() it tends to
2301 -- run out of registers, requiring -monly-n-regs
2303 "-DSTOLEN_X86_REGS="++show n_regs ]
2306 #elif ia64_TARGET_ARCH
2307 = ( [], ["-fomit-frame-pointer", "-G0"] )
2309 #elif x86_64_TARGET_ARCH
2311 #if darwin_TARGET_OS
2316 ["-fomit-frame-pointer",
2317 "-fno-asynchronous-unwind-tables",
2318 -- the unwind tables are unnecessary for HC code,
2319 -- and get in the way of -split-objs. Another option
2320 -- would be to throw them away in the mangler, but this
2323 -- calling builtins like strlen() using the FFI can
2324 -- cause gcc to run out of regs, so use the external
2328 #elif sparc_TARGET_ARCH
2330 -- For now, to suppress the gcc warning "call-clobbered
2331 -- register used for global register variable", we simply
2332 -- disable all warnings altogether using the -w flag. Oh well.
2334 #elif powerpc_apple_darwin_TARGET
2336 -- Disable Apple's precompiling preprocessor. It's a great thing
2337 -- for "normal" programs, but it doesn't support register variable
2339 = ( [], ["-no-cpp-precomp"] )
2344 picCCOpts :: DynFlags -> [String]
2346 #if darwin_TARGET_OS
2347 -- Apple prefers to do things the other way round.
2348 -- PIC is on by default.
2349 -- -mdynamic-no-pic:
2350 -- Turn off PIC code generation.
2352 -- Don't generate "common" symbols - these are unwanted
2353 -- in dynamic libraries.
2356 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2358 = ["-mdynamic-no-pic"]
2359 #elif mingw32_TARGET_OS
2360 -- no -fPIC for Windows
2362 = ["-U __PIC__","-D__PIC__"]
2366 | opt_PIC || not opt_Static
2367 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2372 -- -----------------------------------------------------------------------------
2376 can_split = cSplitObjs == "YES"
2378 -- -----------------------------------------------------------------------------
2381 data Printable = String String
2382 | FromDynFlags (DynFlags -> String)
2384 compilerInfo :: [(String, Printable)]
2385 compilerInfo = [("Project name", String cProjectName),
2386 ("Project version", String cProjectVersion),
2387 ("Booter version", String cBooterVersion),
2388 ("Stage", String cStage),
2389 ("Have interpreter", String cGhcWithInterpreter),
2390 ("Object splitting", String cSplitObjs),
2391 ("Have native code generator", String cGhcWithNativeCodeGen),
2392 ("Support SMP", String cGhcWithSMP),
2393 ("Unregisterised", String cGhcUnregisterised),
2394 ("Tables next to code", String cGhcEnableTablesNextToCode),
2395 ("Win32 DLLs", String cEnableWin32DLLs),
2396 ("RTS ways", String cGhcRTSWays),
2397 ("Leading underscore", String cLeadingUnderscore),
2398 ("Debug on", String (show debugIsOn)),
2399 ("LibDir", FromDynFlags topDir)