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 )
81 import Maybes ( orElse )
86 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
89 import Control.Monad ( when )
93 import System.FilePath
94 import System.IO ( stderr, hPutChar )
96 -- -----------------------------------------------------------------------------
99 -- | Enumerates the simple on-or-off dynamic flags
105 | Opt_D_dump_cmmz_pretty
109 | Opt_D_dump_asm_native
110 | Opt_D_dump_asm_liveness
111 | Opt_D_dump_asm_coalesce
112 | Opt_D_dump_asm_regalloc
113 | Opt_D_dump_asm_regalloc_stages
114 | Opt_D_dump_asm_conflicts
115 | Opt_D_dump_asm_stats
116 | Opt_D_dump_asm_expanded
122 | Opt_D_dump_inlinings
123 | Opt_D_dump_rule_firings
124 | Opt_D_dump_occur_anal
128 | Opt_D_dump_simpl_iterations
129 | Opt_D_dump_simpl_phases
138 | Opt_D_dump_worker_wrapper
139 | Opt_D_dump_rn_trace
140 | Opt_D_dump_rn_stats
142 | Opt_D_dump_simpl_stats
143 | Opt_D_dump_tc_trace
144 | Opt_D_dump_if_trace
151 | Opt_D_verbose_core2core
152 | Opt_D_verbose_stg2stg
154 | Opt_D_dump_hi_diffs
155 | Opt_D_dump_minimal_imports
156 | Opt_D_dump_mod_cycles
157 | Opt_D_dump_view_pattern_commoning
158 | Opt_D_faststring_stats
159 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
160 | Opt_D_no_debug_output
166 | Opt_WarnIsError -- -Werror; makes warnings fatal
167 | Opt_WarnDuplicateExports
169 | Opt_WarnImplicitPrelude
170 | Opt_WarnIncompletePatterns
171 | Opt_WarnIncompletePatternsRecUpd
172 | Opt_WarnMissingFields
173 | Opt_WarnMissingMethods
174 | Opt_WarnMissingSigs
175 | Opt_WarnNameShadowing
176 | Opt_WarnOverlappingPatterns
177 | Opt_WarnSimplePatterns
178 | Opt_WarnTypeDefaults
179 | Opt_WarnMonomorphism
180 | Opt_WarnUnusedBinds
181 | Opt_WarnUnusedImports
182 | Opt_WarnUnusedMatches
183 | Opt_WarnWarningsDeprecations
184 | Opt_WarnDeprecatedFlags
185 | Opt_WarnDodgyExports
186 | Opt_WarnDodgyImports
189 | Opt_WarnUnrecognisedPragmas
190 | Opt_WarnDodgyForeignImports
191 | Opt_WarnLazyUnliftedBindings
192 | Opt_WarnUnusedDoBind
193 | Opt_WarnWrongDoBind
197 | Opt_OverlappingInstances
198 | Opt_UndecidableInstances
199 | Opt_IncoherentInstances
200 | Opt_MonomorphismRestriction
203 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
204 | Opt_ForeignFunctionInterface
205 | Opt_UnliftedFFITypes
206 | Opt_GHCForeignImportPrim
207 | Opt_PArr -- Syntactic support for parallel arrays
208 | Opt_Arrows -- Arrow-notation syntax
209 | Opt_TemplateHaskell
212 | Opt_Generics -- "Derivable type classes"
213 | Opt_ImplicitPrelude
214 | Opt_ScopedTypeVariables
218 | Opt_OverloadedStrings
219 | Opt_DisambiguateRecordFields
220 | Opt_RecordWildCards
227 | Opt_StandaloneDeriving
228 | Opt_DeriveDataTypeable
230 | Opt_DeriveTraversable
233 | Opt_TypeSynonymInstances
234 | Opt_FlexibleContexts
235 | Opt_FlexibleInstances
236 | Opt_ConstrainedClassMethods
237 | Opt_MultiParamTypeClasses
238 | Opt_FunctionalDependencies
240 | Opt_PolymorphicComponents
241 | Opt_ExistentialQuantification
245 | Opt_ParallelListComp
246 | Opt_TransformListComp
247 | Opt_GeneralizedNewtypeDeriving
249 | Opt_PostfixOperators
252 | Opt_LiberalTypeSynonyms
255 | Opt_ImpredicativeTypes
258 | Opt_NewQualifiedOperators
261 | Opt_PrintExplicitForalls
268 | Opt_StaticArgumentTransformation
272 | Opt_IgnoreInterfacePragmas
273 | Opt_OmitInterfacePragmas
274 | Opt_DoLambdaEtaExpansion
278 | Opt_UnboxStrictFields
281 | Opt_InlineIfEnoughArgs
282 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
284 | Opt_RegsGraph -- do graph coloring register allocation
285 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
288 | Opt_AutoSccsOnAllToplevs
289 | Opt_AutoSccsOnExportedToplevs
290 | Opt_AutoSccsOnIndividualCafs
298 | Opt_ExcessPrecision
299 | Opt_EagerBlackHoling
300 | Opt_ReadUserPackageConf
304 | Opt_HideAllPackages
305 | Opt_PrintBindResult
309 | Opt_BreakOnException
311 | Opt_PrintEvldWithShow
312 | Opt_PrintBindContents
315 | Opt_EmitExternalCore
317 | Opt_BuildingCabalPackage
322 | Opt_ConvertToZipCfgAndBack
323 | Opt_AutoLinkPackages
324 | Opt_ImplicitImportQualified
333 | Opt_KeepRawTokenStream
337 -- | Contains not only a collection of 'DynFlag's but also a plethora of
338 -- information relating to the compilation of a single file or GHC session
339 data DynFlags = DynFlags {
342 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
343 stgToDo :: Maybe [StgToDo], -- similarly
344 hscTarget :: HscTarget,
345 hscOutName :: String, -- ^ Name of the output file
346 extCoreName :: String, -- ^ Name of the .hcr output file
347 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
348 optLevel :: Int, -- ^ Optimisation level
349 simplPhases :: Int, -- ^ Number of simplifier phases
350 maxSimplIterations :: Int, -- ^ Max simplifier iterations
351 shouldDumpSimplPhase :: SimplifierMode -> Bool,
352 ruleCheck :: Maybe String,
354 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
355 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
356 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
358 #ifndef OMIT_NATIVE_CODEGEN
359 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
361 stolen_x86_regs :: Int,
362 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
363 importPaths :: [FilePath],
365 mainFunIs :: Maybe String,
366 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
368 dphBackend :: DPHBackend,
370 thisPackage :: PackageId, -- ^ name of package currently being compiled
373 ways :: [Way], -- ^ Way flags from the command line
374 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
375 rtsBuildTag :: String, -- ^ The RTS \"way\"
377 -- For object splitting
378 splitInfo :: Maybe (String,Int),
381 objectDir :: Maybe String,
382 hiDir :: Maybe String,
383 stubDir :: Maybe String,
389 outputFile :: Maybe String,
390 outputHi :: Maybe String,
391 dynLibLoader :: DynLibLoader,
393 -- | This is set by 'DriverPipeline.runPipeline' based on where
394 -- its output is going.
395 dumpPrefix :: Maybe FilePath,
397 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
398 -- Set by @-ddump-file-prefix@
399 dumpPrefixForce :: Maybe FilePath,
401 includePaths :: [String],
402 libraryPaths :: [String],
403 frameworkPaths :: [String], -- used on darwin only
404 cmdlineFrameworks :: [String], -- ditto
405 tmpDir :: String, -- no trailing '/'
407 ghcUsagePath :: FilePath, -- Filled in by SysTools
408 ghciUsagePath :: FilePath, -- ditto
410 hpcDir :: String, -- ^ Path to store the .mix files
412 -- options for particular phases
420 opt_windres :: [String],
422 -- commands for particular phases
424 pgm_P :: (String,[Option]),
426 pgm_c :: (String,[Option]),
427 pgm_m :: (String,[Option]),
428 pgm_s :: (String,[Option]),
429 pgm_a :: (String,[Option]),
430 pgm_l :: (String,[Option]),
431 pgm_dll :: (String,[Option]),
433 pgm_sysman :: String,
434 pgm_windres :: String,
437 depMakefile :: FilePath,
438 depIncludePkgDeps :: Bool,
439 depExcludeMods :: [ModuleName],
440 depSuffixes :: [String],
443 extraPkgConfs :: [FilePath],
444 topDir :: FilePath, -- filled in by SysTools
445 systemPackageConfig :: FilePath, -- ditto
446 -- ^ The @-package-conf@ flags given on the command line, in the order
449 packageFlags :: [PackageFlag],
450 -- ^ The @-package@ and @-hide-package@ flags from the command-line
453 -- NB. do not modify this field, it is calculated by
454 -- Packages.initPackages and Packages.updatePackages.
455 pkgDatabase :: Maybe [PackageConfig],
456 pkgState :: PackageState,
459 -- These have to be IORefs, because the defaultCleanupHandler needs to
460 -- know what to clean when an exception happens
461 filesToClean :: IORef [FilePath],
462 dirsToClean :: IORef (FiniteMap FilePath FilePath),
467 -- | Message output action: use "ErrUtils" instead of this if you can
468 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
470 haddockOptions :: Maybe String
473 wayNames :: DynFlags -> [WayName]
474 wayNames = map wayName . ways
476 -- | The target code type of the compilation (if any).
478 -- Whenever you change the target, also make sure to set 'ghcLink' to
479 -- something sensible.
481 -- 'HscNothing' can be used to avoid generating any output, however, note
484 -- * This will not run the desugaring step, thus no warnings generated in
485 -- this step will be output. In particular, this includes warnings related
486 -- to pattern matching. You can run the desugarer manually using
487 -- 'GHC.desugarModule'.
489 -- * If a program uses Template Haskell the typechecker may try to run code
490 -- from an imported module. This will fail if no code has been generated
491 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
492 -- whether this might be the case and choose to either switch to a
493 -- different target or avoid typechecking such modules. (The latter may
494 -- preferable for security reasons.)
497 = HscC -- ^ Generate C code.
498 | HscAsm -- ^ Generate assembly using the native code generator.
499 | HscJava -- ^ Generate Java bytecode.
500 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
501 | HscNothing -- ^ Don't generate any code. See notes above.
504 -- | Will this target result in an object file on the disk?
505 isObjectTarget :: HscTarget -> Bool
506 isObjectTarget HscC = True
507 isObjectTarget HscAsm = True
508 isObjectTarget _ = False
510 -- | The 'GhcMode' tells us whether we're doing multi-module
511 -- compilation (controlled via the "GHC" API) or one-shot
512 -- (single-module) compilation. This makes a difference primarily to
513 -- the "Finder": in one-shot mode we look for interface files for
514 -- imported modules, but in multi-module mode we look for source files
515 -- in order to check whether they need to be recompiled.
517 = CompManager -- ^ @\-\-make@, GHCi, etc.
518 | OneShot -- ^ @ghc -c Foo.hs@
519 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
522 instance Outputable GhcMode where
523 ppr CompManager = ptext (sLit "CompManager")
524 ppr OneShot = ptext (sLit "OneShot")
525 ppr MkDepend = ptext (sLit "MkDepend")
527 isOneShot :: GhcMode -> Bool
528 isOneShot OneShot = True
529 isOneShot _other = False
531 -- | What to do in the link step, if there is one.
533 = NoLink -- ^ Don't link at all
534 | LinkBinary -- ^ Link object code into a binary
535 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
536 -- bytecode and object code).
537 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
540 isNoLink :: GhcLink -> Bool
541 isNoLink NoLink = True
544 -- Is it worth evaluating this Bool and caching it in the DynFlags value
545 -- during initDynFlags?
546 doingTickyProfiling :: DynFlags -> Bool
547 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
550 = ExposePackage String
551 | ExposePackageId String
553 | IgnorePackage String
556 defaultHscTarget :: HscTarget
557 defaultHscTarget = defaultObjectTarget
559 -- | The 'HscTarget' value corresponding to the default way to create
560 -- object files on the current platform.
561 defaultObjectTarget :: HscTarget
563 | cGhcWithNativeCodeGen == "YES" = HscAsm
568 | Wrapped (Maybe String)
572 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
573 initDynFlags :: DynFlags -> IO DynFlags
574 initDynFlags dflags = do
575 -- someday these will be dynamic flags
576 ways <- readIORef v_Ways
577 refFilesToClean <- newIORef []
578 refDirsToClean <- newIORef emptyFM
581 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
582 rtsBuildTag = mkBuildTag ways,
583 filesToClean = refFilesToClean,
584 dirsToClean = refDirsToClean
587 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
588 -- and must be fully initialized by 'GHC.newSession' first.
589 defaultDynFlags :: DynFlags
592 ghcMode = CompManager,
593 ghcLink = LinkBinary,
596 hscTarget = defaultHscTarget,
602 maxSimplIterations = 4,
603 shouldDumpSimplPhase = const False,
605 specConstrThreshold = Just 200,
606 specConstrCount = Just 3,
607 liberateCaseThreshold = Just 200,
608 #ifndef OMIT_NATIVE_CODEGEN
609 targetPlatform = defaultTargetPlatform,
612 cmdlineHcIncludes = [],
616 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
620 thisPackage = mainPackageId,
626 objectSuf = phaseInputExt StopLn,
627 hcSuf = phaseInputExt HCc,
630 outputFile = Nothing,
632 dynLibLoader = SystemDependent,
633 dumpPrefix = Nothing,
634 dumpPrefixForce = Nothing,
638 cmdlineFrameworks = [],
639 tmpDir = cDEFAULT_TMPDIR,
645 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
656 pkgDatabase = Nothing,
657 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
658 ways = panic "defaultDynFlags: No ways",
659 buildTag = panic "defaultDynFlags: No buildTag",
660 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
662 -- initSysTools fills all these in
663 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
664 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
665 topDir = panic "defaultDynFlags: No topDir",
666 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
667 pgm_L = panic "defaultDynFlags: No pgm_L",
668 pgm_P = panic "defaultDynFlags: No pgm_P",
669 pgm_F = panic "defaultDynFlags: No pgm_F",
670 pgm_c = panic "defaultDynFlags: No pgm_c",
671 pgm_m = panic "defaultDynFlags: No pgm_m",
672 pgm_s = panic "defaultDynFlags: No pgm_s",
673 pgm_a = panic "defaultDynFlags: No pgm_a",
674 pgm_l = panic "defaultDynFlags: No pgm_l",
675 pgm_dll = panic "defaultDynFlags: No pgm_dll",
676 pgm_T = panic "defaultDynFlags: No pgm_T",
677 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
678 pgm_windres = panic "defaultDynFlags: No pgm_windres",
679 -- end of initSysTools values
681 depMakefile = "Makefile",
682 depIncludePkgDeps = False,
685 -- end of ghc -M values
686 filesToClean = panic "defaultDynFlags: No filesToClean",
687 dirsToClean = panic "defaultDynFlags: No dirsToClean",
688 haddockOptions = Nothing,
690 Opt_AutoLinkPackages,
691 Opt_ReadUserPackageConf,
693 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
694 -- behaviour the default, to see if anyone notices
698 Opt_MonomorphismRestriction,
709 Opt_PrintBindContents
711 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
712 -- The default -O0 options
715 log_action = \severity srcSpan style msg ->
717 SevInfo -> printErrs (msg style)
718 SevFatal -> printErrs (msg style)
721 printErrs ((mkLocMessage srcSpan msg) style)
722 -- careful (#2302): printErrs prints in UTF-8, whereas
723 -- converting to string first and using hPutStr would
724 -- just emit the low 8 bits of each unicode char.
731 0 | print errors & warnings only
732 1 | minimal verbosity: print "compiling M ... done." for each module.
733 2 | equivalent to -dshow-passes
734 3 | equivalent to existing "ghc -v"
735 4 | "ghc -v -ddump-most"
736 5 | "ghc -v -ddump-all"
739 -- | Test whether a 'DynFlag' is set
740 dopt :: DynFlag -> DynFlags -> Bool
741 dopt f dflags = f `elem` (flags dflags)
744 dopt_set :: DynFlags -> DynFlag -> DynFlags
745 dopt_set dfs f = dfs{ flags = f : flags dfs }
747 -- | Unset a 'DynFlag'
748 dopt_unset :: DynFlags -> DynFlag -> DynFlags
749 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
751 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
752 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
753 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
754 -> [a] -- ^ Correctly ordered extracted options
755 getOpts dflags opts = reverse (opts dflags)
756 -- We add to the options from the front, so we need to reverse the list
758 -- | Gets the verbosity flag for the current verbosity level. This is fed to
759 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
760 getVerbFlag :: DynFlags -> String
762 | verbosity dflags >= 3 = "-v"
765 setObjectDir, setHiDir, setStubDir, setOutputDir,
766 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
767 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
768 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
769 addCmdlineFramework, addHaddockOpts
770 :: String -> DynFlags -> DynFlags
771 setOutputFile, setOutputHi, setDumpPrefixForce
772 :: Maybe String -> DynFlags -> DynFlags
774 setObjectDir f d = d{ objectDir = Just f}
775 setHiDir f d = d{ hiDir = Just f}
776 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
777 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
778 -- \#included from the .hc file when compiling with -fvia-C.
779 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
781 setObjectSuf f d = d{ objectSuf = f}
782 setHiSuf f d = d{ hiSuf = f}
783 setHcSuf f d = d{ hcSuf = f}
785 setOutputFile f d = d{ outputFile = f}
786 setOutputHi f d = d{ outputHi = f}
788 parseDynLibLoaderMode f d =
790 ("deploy", "") -> d{ dynLibLoader = Deployable }
791 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
792 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
793 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
794 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
795 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
797 setDumpPrefixForce f d = d { dumpPrefixForce = f}
799 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
800 -- Config.hs should really use Option.
801 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
803 setPgmL f d = d{ pgm_L = f}
804 setPgmF f d = d{ pgm_F = f}
805 setPgmc f d = d{ pgm_c = (f,[])}
806 setPgmm f d = d{ pgm_m = (f,[])}
807 setPgms f d = d{ pgm_s = (f,[])}
808 setPgma f d = d{ pgm_a = (f,[])}
809 setPgml f d = d{ pgm_l = (f,[])}
810 setPgmdll f d = d{ pgm_dll = (f,[])}
811 setPgmwindres f d = d{ pgm_windres = f}
813 addOptL f d = d{ opt_L = f : opt_L d}
814 addOptP f d = d{ opt_P = f : opt_P d}
815 addOptF f d = d{ opt_F = f : opt_F d}
816 addOptc f d = d{ opt_c = f : opt_c d}
817 addOptm f d = d{ opt_m = f : opt_m d}
818 addOpta f d = d{ opt_a = f : opt_a d}
819 addOptl f d = d{ opt_l = f : opt_l d}
820 addOptwindres f d = d{ opt_windres = f : opt_windres d}
822 setDepMakefile :: FilePath -> DynFlags -> DynFlags
823 setDepMakefile f d = d { depMakefile = deOptDep f }
825 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
826 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
828 addDepExcludeMod :: String -> DynFlags -> DynFlags
830 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
832 addDepSuffix :: FilePath -> DynFlags -> DynFlags
833 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
836 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
837 -- we need to strip the "-optdep" off of the arg
838 deOptDep :: String -> String
839 deOptDep x = case stripPrefix "-optdep" x of
843 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
845 addHaddockOpts f d = d{ haddockOptions = Just f}
847 -- -----------------------------------------------------------------------------
848 -- Command-line options
850 -- | When invoking external tools as part of the compilation pipeline, we
851 -- pass these a sequence of options on the command-line. Rather than
852 -- just using a list of Strings, we use a type that allows us to distinguish
853 -- between filepaths and 'other stuff'. The reason for this is that
854 -- this type gives us a handle on transforming filenames, and filenames only,
855 -- to whatever format they're expected to be on a particular platform.
857 = FileOption -- an entry that _contains_ filename(s) / filepaths.
858 String -- a non-filepath prefix that shouldn't be
859 -- transformed (e.g., "/out=")
860 String -- the filepath/filename portion
863 showOpt :: Option -> String
864 showOpt (FileOption pre f) = pre ++ f
865 showOpt (Option s) = s
867 -----------------------------------------------------------------------------
868 -- Setting the optimisation level
870 updOptLevel :: Int -> DynFlags -> DynFlags
871 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
873 = dfs2{ optLevel = final_n }
875 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
876 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
877 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
879 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
880 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
882 optLevelFlags :: [([Int], DynFlag)]
884 = [ ([0], Opt_IgnoreInterfacePragmas)
885 , ([0], Opt_OmitInterfacePragmas)
887 , ([1,2], Opt_IgnoreAsserts)
888 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
890 , ([1,2], Opt_DoEtaReduction)
891 , ([1,2], Opt_CaseMerge)
892 , ([1,2], Opt_Strictness)
894 , ([1,2], Opt_FullLaziness)
895 , ([1,2], Opt_Specialise)
896 , ([1,2], Opt_FloatIn)
898 , ([2], Opt_LiberateCase)
899 , ([2], Opt_SpecConstr)
901 -- , ([2], Opt_StaticArgumentTransformation)
902 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
903 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
904 -- several improvements to the heuristics, and I'm concerned that without
905 -- those changes SAT will interfere with some attempts to write "high
906 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
907 -- this year. In particular, the version in HEAD lacks the tail call
908 -- criterion, so many things that look like reasonable loops will be
909 -- turned into functions with extra (unneccesary) thunk creation.
911 , ([0,1,2], Opt_DoLambdaEtaExpansion)
912 -- This one is important for a tiresome reason:
913 -- we want to make sure that the bindings for data
914 -- constructors are eta-expanded. This is probably
915 -- a good thing anyway, but it seems fragile.
918 -- -----------------------------------------------------------------------------
919 -- Standard sets of warning options
921 standardWarnings :: [DynFlag]
923 = [ Opt_WarnWarningsDeprecations,
924 Opt_WarnDeprecatedFlags,
925 Opt_WarnUnrecognisedPragmas,
926 Opt_WarnOverlappingPatterns,
927 Opt_WarnMissingFields,
928 Opt_WarnMissingMethods,
929 Opt_WarnDuplicateExports,
930 Opt_WarnLazyUnliftedBindings,
931 Opt_WarnDodgyForeignImports,
935 minusWOpts :: [DynFlag]
937 = standardWarnings ++
938 [ Opt_WarnUnusedBinds,
939 Opt_WarnUnusedMatches,
940 Opt_WarnUnusedImports,
941 Opt_WarnIncompletePatterns,
942 Opt_WarnDodgyExports,
946 minusWallOpts :: [DynFlag]
949 [ Opt_WarnTypeDefaults,
950 Opt_WarnNameShadowing,
957 -- minuswRemovesOpts should be every warning option
958 minuswRemovesOpts :: [DynFlag]
961 [Opt_WarnImplicitPrelude,
962 Opt_WarnIncompletePatternsRecUpd,
963 Opt_WarnSimplePatterns,
964 Opt_WarnMonomorphism,
965 Opt_WarnUnrecognisedPragmas,
969 -- -----------------------------------------------------------------------------
970 -- CoreToDo: abstraction of core-to-core passes to run.
972 data CoreToDo -- These are diff core-to-core passes,
973 -- which may be invoked in any order,
974 -- as many times as you like.
976 = CoreDoSimplify -- The core-to-core simplifier.
979 -- Each run of the simplifier can take a different
980 -- set of simplifier-specific flags.
982 | CoreDoFloatOutwards FloatOutSwitches
987 | CoreDoWorkerWrapper
990 | CoreDoOldStrictness
993 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
994 -- matching this string
995 | CoreDoVectorisation PackageId
996 | CoreDoNothing -- Useful when building up
997 | CoreDoPasses [CoreToDo] -- lists of these things
1000 data SimplifierMode -- See comments in SimplMonad
1002 | SimplPhase Int [String]
1004 instance Outputable SimplifierMode where
1005 ppr SimplGently = ptext (sLit "gentle")
1006 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1009 data SimplifierSwitch
1010 = MaxSimplifierIterations Int
1014 data FloatOutSwitches = FloatOutSwitches {
1015 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1016 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1017 -- even if they do not escape a lambda
1020 instance Outputable FloatOutSwitches where
1021 ppr = pprFloatOutSwitches
1023 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1024 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1025 <+> pp_not (floatOutConstants sw) <+> text "constants"
1028 pp_not False = text "not"
1030 -- | Switches that specify the minimum amount of floating out
1031 -- gentleFloatOutSwitches :: FloatOutSwitches
1032 -- gentleFloatOutSwitches = FloatOutSwitches False False
1034 -- | Switches that do not specify floating out of lambdas, just of constants
1035 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1036 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1039 -- The core-to-core pass ordering is derived from the DynFlags:
1040 runWhen :: Bool -> CoreToDo -> CoreToDo
1041 runWhen True do_this = do_this
1042 runWhen False _ = CoreDoNothing
1044 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1045 runMaybe (Just x) f = f x
1046 runMaybe Nothing _ = CoreDoNothing
1048 getCoreToDo :: DynFlags -> [CoreToDo]
1050 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1051 | otherwise = core_todo
1053 opt_level = optLevel dflags
1054 phases = simplPhases dflags
1055 max_iter = maxSimplIterations dflags
1056 strictness = dopt Opt_Strictness dflags
1057 full_laziness = dopt Opt_FullLaziness dflags
1058 do_specialise = dopt Opt_Specialise dflags
1059 do_float_in = dopt Opt_FloatIn dflags
1060 cse = dopt Opt_CSE dflags
1061 spec_constr = dopt Opt_SpecConstr dflags
1062 liberate_case = dopt Opt_LiberateCase dflags
1063 rule_check = ruleCheck dflags
1064 static_args = dopt Opt_StaticArgumentTransformation dflags
1066 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1068 simpl_phase phase names iter
1070 [ CoreDoSimplify (SimplPhase phase names) [
1071 MaxSimplifierIterations iter
1073 maybe_rule_check phase
1077 = runWhen (dopt Opt_Vectorise dflags)
1078 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1081 -- By default, we have 2 phases before phase 0.
1083 -- Want to run with inline phase 2 after the specialiser to give
1084 -- maximum chance for fusion to work before we inline build/augment
1085 -- in phase 1. This made a difference in 'ansi' where an
1086 -- overloaded function wasn't inlined till too late.
1088 -- Need phase 1 so that build/augment get
1089 -- inlined. I found that spectral/hartel/genfft lost some useful
1090 -- strictness in the function sumcode' if augment is not inlined
1091 -- before strictness analysis runs
1092 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1093 | phase <- [phases, phases-1 .. 1] ]
1096 -- initial simplify: mk specialiser happy: minimum effort please
1097 simpl_gently = CoreDoSimplify SimplGently [
1098 -- Simplify "gently"
1099 -- Don't inline anything till full laziness has bitten
1100 -- In particular, inlining wrappers inhibits floating
1101 -- e.g. ...(case f x of ...)...
1102 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1103 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1104 -- and now the redex (f x) isn't floatable any more
1105 -- Similarly, don't apply any rules until after full
1106 -- laziness. Notably, list fusion can prevent floating.
1108 NoCaseOfCase, -- Don't do case-of-case transformations.
1109 -- This makes full laziness work better
1110 MaxSimplifierIterations max_iter
1114 if opt_level == 0 then
1116 simpl_phase 0 ["final"] max_iter]
1117 else {- opt_level >= 1 -} [
1119 -- We want to do the static argument transform before full laziness as it
1120 -- may expose extra opportunities to float things outwards. However, to fix
1121 -- up the output of the transformation we need at do at least one simplify
1122 -- after this before anything else
1123 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1125 -- We run vectorisation here for now, but we might also try to run
1129 -- initial simplify: mk specialiser happy: minimum effort please
1132 -- Specialisation is best done before full laziness
1133 -- so that overloaded functions have all their dictionary lambdas manifest
1134 runWhen do_specialise CoreDoSpecialising,
1136 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1137 -- Was: gentleFloatOutSwitches
1138 -- I have no idea why, but not floating constants to top level is
1139 -- very bad in some cases.
1140 -- Notably: p_ident in spectral/rewrite
1141 -- Changing from "gentle" to "constantsOnly" improved
1142 -- rewrite's allocation by 19%, and made 0.0% difference
1143 -- to any other nofib benchmark
1145 runWhen do_float_in CoreDoFloatInwards,
1149 -- Phase 0: allow all Ids to be inlined now
1150 -- This gets foldr inlined before strictness analysis
1152 -- At least 3 iterations because otherwise we land up with
1153 -- huge dead expressions because of an infelicity in the
1155 -- let k = BIG in foldr k z xs
1156 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1157 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1159 simpl_phase 0 ["main"] (max max_iter 3),
1162 #ifdef OLD_STRICTNESS
1163 CoreDoOldStrictness,
1165 runWhen strictness (CoreDoPasses [
1167 CoreDoWorkerWrapper,
1169 simpl_phase 0 ["post-worker-wrapper"] max_iter
1172 runWhen full_laziness
1173 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1174 -- nofib/spectral/hartel/wang doubles in speed if you
1175 -- do full laziness late in the day. It only happens
1176 -- after fusion and other stuff, so the early pass doesn't
1177 -- catch it. For the record, the redex is
1178 -- f_el22 (f_el21 r_midblock)
1181 runWhen cse CoreCSE,
1182 -- We want CSE to follow the final full-laziness pass, because it may
1183 -- succeed in commoning up things floated out by full laziness.
1184 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1186 runWhen do_float_in CoreDoFloatInwards,
1190 -- Case-liberation for -O2. This should be after
1191 -- strictness analysis and the simplification which follows it.
1192 runWhen liberate_case (CoreDoPasses [
1194 simpl_phase 0 ["post-liberate-case"] max_iter
1195 ]), -- Run the simplifier after LiberateCase to vastly
1196 -- reduce the possiblility of shadowing
1197 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1199 runWhen spec_constr CoreDoSpecConstr,
1203 -- Final clean-up simplification:
1204 simpl_phase 0 ["final"] max_iter
1207 -- -----------------------------------------------------------------------------
1208 -- StgToDo: abstraction of stg-to-stg passes to run.
1211 = StgDoMassageForProfiling -- should be (next to) last
1212 -- There's also setStgVarInfo, but its absolute "lastness"
1213 -- is so critical that it is hardwired in (no flag).
1216 getStgToDo :: DynFlags -> [StgToDo]
1218 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1221 stg_stats = dopt Opt_StgStats dflags
1223 todo1 = if stg_stats then [D_stg_stats] else []
1225 todo2 | WayProf `elem` wayNames dflags
1226 = StgDoMassageForProfiling : todo1
1230 -- -----------------------------------------------------------------------------
1233 allFlags :: [String]
1234 allFlags = map ('-':) $
1235 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1236 map ("fno-"++) flags ++
1237 map ("f"++) flags ++
1238 map ("X"++) supportedLanguages ++
1239 map ("XNo"++) supportedLanguages
1240 where ok (PrefixPred _ _) = False
1242 flags = [ name | (name, _, _) <- fFlags ]
1244 dynamic_flags :: [Flag DynP]
1246 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1247 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1248 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1249 , Flag "#include" (HasArg (addCmdlineHCInclude))
1250 (Deprecated "No longer has any effect")
1251 , Flag "v" (OptIntSuffix setVerbosity) Supported
1253 ------- Specific phases --------------------------------------------
1254 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1255 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1256 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1257 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1258 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1259 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1260 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1261 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1262 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1263 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1265 , Flag "optL" (HasArg (upd . addOptL)) Supported
1266 , Flag "optP" (HasArg (upd . addOptP)) Supported
1267 , Flag "optF" (HasArg (upd . addOptF)) Supported
1268 , Flag "optc" (HasArg (upd . addOptc)) Supported
1269 , Flag "optm" (HasArg (upd . addOptm)) Supported
1270 , Flag "opta" (HasArg (upd . addOpta)) Supported
1271 , Flag "optl" (HasArg (upd . addOptl)) Supported
1272 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1275 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1278 -------- ghc -M -----------------------------------------------------
1279 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1280 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1281 (Deprecated "Use -dep-suffix instead")
1282 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1283 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1284 (Deprecated "Use -dep-makefile instead")
1285 , Flag "optdep-w" (NoArg (return ()))
1286 (Deprecated "-optdep-w doesn't do anything")
1287 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1288 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1289 (Deprecated "Use -include-pkg-deps instead")
1290 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1291 (Deprecated "Use -include-pkg-deps instead")
1292 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1293 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1294 (Deprecated "Use -exclude-module instead")
1295 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1296 (Deprecated "Use -exclude-module instead")
1298 -------- Linking ----------------------------------------------------
1299 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1301 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1302 (Deprecated "Use -c instead")
1303 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1305 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1308 ------- Libraries ---------------------------------------------------
1309 , Flag "L" (Prefix addLibraryPath ) Supported
1310 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1312 ------- Frameworks --------------------------------------------------
1313 -- -framework-path should really be -F ...
1314 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1315 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1317 ------- Output Redirection ------------------------------------------
1318 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1319 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1320 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1321 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1322 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1323 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1324 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1325 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1326 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1327 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1328 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1331 ------- Keeping temporary files -------------------------------------
1332 -- These can be singular (think ghc -c) or plural (think ghc --make)
1333 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1334 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1335 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1336 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1337 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1338 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1339 -- This only makes sense as plural
1340 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1342 ------- Miscellaneous ----------------------------------------------
1343 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1344 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1345 , Flag "main-is" (SepArg setMainIs ) Supported
1346 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1347 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1348 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1350 ------- recompilation checker --------------------------------------
1351 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1352 (Deprecated "Use -fno-force-recomp instead")
1353 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1354 (Deprecated "Use -fforce-recomp instead")
1356 ------ HsCpp opts ---------------------------------------------------
1357 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1358 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1360 ------- Include/Import Paths ----------------------------------------
1361 , Flag "I" (Prefix addIncludePath) Supported
1362 , Flag "i" (OptPrefix addImportPath ) Supported
1364 ------ Debugging ----------------------------------------------------
1365 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1367 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1369 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1371 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1373 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1375 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1377 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1379 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1381 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1383 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1385 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1387 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1389 , Flag "ddump-asm-regalloc-stages"
1390 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1392 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1394 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1396 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1398 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1400 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1402 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1404 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1406 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1408 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1410 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1412 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1414 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1416 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1418 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1420 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1422 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1424 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1426 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1428 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1430 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1432 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1434 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1436 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1438 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1440 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1442 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1444 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1446 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1448 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1450 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1452 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1454 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1456 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1458 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1460 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1462 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1464 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1466 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1468 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1470 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1472 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1474 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1476 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1478 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1481 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1483 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1485 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1487 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1489 , Flag "dshow-passes"
1490 (NoArg (do forceRecompile
1491 setVerbosity (Just 2)))
1493 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1496 ------ Machine dependant (-m<blah>) stuff ---------------------------
1498 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1500 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1502 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1505 ------ Warning opts -------------------------------------------------
1506 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1508 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1510 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1512 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1514 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1515 (Deprecated "Use -w instead")
1516 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1519 ------ Optimisation flags ------------------------------------------
1520 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1521 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1522 (Deprecated "Use -O0 instead")
1523 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1524 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1526 -- If the number is missing, use 1
1528 , Flag "fsimplifier-phases"
1529 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1531 , Flag "fmax-simplifier-iterations"
1532 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1535 , Flag "fspec-constr-threshold"
1536 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1538 , Flag "fno-spec-constr-threshold"
1539 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1541 , Flag "fspec-constr-count"
1542 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1544 , Flag "fno-spec-constr-count"
1545 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1547 , Flag "fliberate-case-threshold"
1548 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1550 , Flag "fno-liberate-case-threshold"
1551 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1554 , Flag "frule-check"
1555 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1557 , Flag "fcontext-stack"
1558 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1561 ------ Profiling ----------------------------------------------------
1563 -- XXX Should the -f* flags be deprecated?
1564 -- They don't seem to be documented
1565 , Flag "fauto-sccs-on-all-toplevs"
1566 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1569 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1571 , Flag "no-auto-all"
1572 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1574 , Flag "fauto-sccs-on-exported-toplevs"
1575 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1578 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1581 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1583 , Flag "fauto-sccs-on-individual-cafs"
1584 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1587 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1590 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1593 ------ DPH flags ----------------------------------------------------
1596 (NoArg (setDPHBackend DPHSeq))
1599 (NoArg (setDPHBackend DPHPar))
1602 (NoArg (setDPHBackend DPHThis))
1605 ------ Compiler flags -----------------------------------------------
1607 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1608 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1609 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1611 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1612 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1613 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1615 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1617 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1620 ++ map (mkFlag True "f" setDynFlag ) fFlags
1621 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1622 ++ map (mkFlag True "X" setDynFlag ) xFlags
1623 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1625 package_flags :: [Flag DynP]
1627 ------- Packages ----------------------------------------------------
1628 Flag "package-conf" (HasArg extraPkgConf_) Supported
1629 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1631 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1632 , Flag "package-id" (HasArg exposePackageId) Supported
1633 , Flag "package" (HasArg exposePackage) Supported
1634 , Flag "hide-package" (HasArg hidePackage) Supported
1635 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1637 , Flag "ignore-package" (HasArg ignorePackage)
1639 , Flag "syslib" (HasArg exposePackage)
1640 (Deprecated "Use -package instead")
1643 mkFlag :: Bool -- ^ True <=> it should be turned on
1644 -> String -- ^ The flag prefix
1645 -> (DynFlag -> DynP ())
1646 -> (String, DynFlag, Bool -> Deprecated)
1648 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1649 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1651 deprecatedForLanguage :: String -> Bool -> Deprecated
1652 deprecatedForLanguage lang turn_on
1653 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1655 flag | turn_on = lang
1656 | otherwise = "No"++lang
1658 useInstead :: String -> Bool -> Deprecated
1659 useInstead flag turn_on
1660 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1662 no = if turn_on then "" else "no-"
1664 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1665 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1667 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1668 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1669 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1670 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1671 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1672 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1673 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1674 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1675 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1676 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1677 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1678 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1679 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1680 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1681 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1682 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1683 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1684 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1685 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1686 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1687 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1688 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1689 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1690 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1691 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1692 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1693 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1694 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1695 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1696 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1697 ( "strictness", Opt_Strictness, const Supported ),
1698 ( "specialise", Opt_Specialise, const Supported ),
1699 ( "float-in", Opt_FloatIn, const Supported ),
1700 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1701 ( "full-laziness", Opt_FullLaziness, const Supported ),
1702 ( "liberate-case", Opt_LiberateCase, const Supported ),
1703 ( "spec-constr", Opt_SpecConstr, const Supported ),
1704 ( "cse", Opt_CSE, const Supported ),
1705 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1706 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1707 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1708 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1709 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1710 ( "case-merge", Opt_CaseMerge, const Supported ),
1711 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1712 ( "method-sharing", Opt_MethodSharing, const Supported ),
1713 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1714 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1715 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1716 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1717 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1718 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1719 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1720 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1721 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1722 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1723 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1724 ( "break-on-error", Opt_BreakOnError, const Supported ),
1725 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1726 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1727 ( "run-cps", Opt_RunCPS, const Supported ),
1728 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1729 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1730 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1731 ( "vectorise", Opt_Vectorise, const Supported ),
1732 ( "regs-graph", Opt_RegsGraph, const Supported ),
1733 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1734 ( "th", Opt_TemplateHaskell,
1735 deprecatedForLanguage "TemplateHaskell" ),
1736 ( "fi", Opt_ForeignFunctionInterface,
1737 deprecatedForLanguage "ForeignFunctionInterface" ),
1738 ( "ffi", Opt_ForeignFunctionInterface,
1739 deprecatedForLanguage "ForeignFunctionInterface" ),
1740 ( "arrows", Opt_Arrows,
1741 deprecatedForLanguage "Arrows" ),
1742 ( "generics", Opt_Generics,
1743 deprecatedForLanguage "Generics" ),
1744 ( "implicit-prelude", Opt_ImplicitPrelude,
1745 deprecatedForLanguage "ImplicitPrelude" ),
1746 ( "bang-patterns", Opt_BangPatterns,
1747 deprecatedForLanguage "BangPatterns" ),
1748 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1749 deprecatedForLanguage "MonomorphismRestriction" ),
1750 ( "mono-pat-binds", Opt_MonoPatBinds,
1751 deprecatedForLanguage "MonoPatBinds" ),
1752 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1753 deprecatedForLanguage "ExtendedDefaultRules" ),
1754 ( "implicit-params", Opt_ImplicitParams,
1755 deprecatedForLanguage "ImplicitParams" ),
1756 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1757 deprecatedForLanguage "ScopedTypeVariables" ),
1759 deprecatedForLanguage "PArr" ),
1760 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1761 deprecatedForLanguage "OverlappingInstances" ),
1762 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1763 deprecatedForLanguage "UndecidableInstances" ),
1764 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1765 deprecatedForLanguage "IncoherentInstances" ),
1766 ( "gen-manifest", Opt_GenManifest, const Supported ),
1767 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1768 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1769 ( "shared-implib", Opt_SharedImplib, const Supported ),
1770 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1771 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1774 supportedLanguages :: [String]
1775 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1777 -- This may contain duplicates
1778 languageOptions :: [DynFlag]
1779 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1781 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1782 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1784 ( "CPP", Opt_Cpp, const Supported ),
1785 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1786 ( "TupleSections", Opt_TupleSections, const Supported ),
1787 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1788 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1789 ( "MagicHash", Opt_MagicHash, const Supported ),
1790 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1791 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1792 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1793 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1794 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1795 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1796 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1797 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1798 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1799 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1800 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1801 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1802 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1803 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1804 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1805 ( "Arrows", Opt_Arrows, const Supported ),
1806 ( "PArr", Opt_PArr, const Supported ),
1807 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1808 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1809 ( "Generics", Opt_Generics, const Supported ),
1811 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1812 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1813 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1814 ( "RecordPuns", Opt_RecordPuns,
1815 deprecatedForLanguage "NamedFieldPuns" ),
1816 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1817 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1818 ( "GADTs", Opt_GADTs, const Supported ),
1819 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1820 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1821 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1823 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1825 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1826 -- On by default (which is not strictly H98):
1827 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1828 ( "ExplicitForAll", Opt_ExplicitForAll, const Supported ),
1829 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1830 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1831 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1832 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1833 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1835 ( "PatternSignatures", Opt_ScopedTypeVariables,
1836 deprecatedForLanguage "ScopedTypeVariables" ),
1838 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1839 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1840 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1841 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1842 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1843 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1844 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1845 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1846 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1847 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1848 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1849 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1850 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1851 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1852 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1853 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1854 ( "PackageImports", Opt_PackageImports, const Supported ),
1855 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1858 impliedFlags :: [(DynFlag, DynFlag)]
1860 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1861 , (Opt_Rank2Types, Opt_ExplicitForAll)
1862 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1863 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1864 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1865 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1867 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1868 -- be completely rigid for GADTs
1870 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1871 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1872 -- all over the place
1874 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1875 -- Note [Scoped tyvars] in TcBinds
1876 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1878 -- Record wild-cards implies field disambiguation
1879 -- Otherwise if you write (C {..}) you may well get
1880 -- stuff like " 'a' not in scope ", which is a bit silly
1881 -- if the compiler has just filled in field 'a' of constructor 'C'
1882 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1885 glasgowExtsFlags :: [DynFlag]
1886 glasgowExtsFlags = [
1887 Opt_PrintExplicitForalls
1888 , Opt_ForeignFunctionInterface
1889 , Opt_UnliftedFFITypes
1891 , Opt_ImplicitParams
1892 , Opt_ScopedTypeVariables
1894 , Opt_TypeSynonymInstances
1895 , Opt_StandaloneDeriving
1896 , Opt_DeriveDataTypeable
1898 , Opt_DeriveFoldable
1899 , Opt_DeriveTraversable
1900 , Opt_FlexibleContexts
1901 , Opt_FlexibleInstances
1902 , Opt_ConstrainedClassMethods
1903 , Opt_MultiParamTypeClasses
1904 , Opt_FunctionalDependencies
1906 , Opt_PolymorphicComponents
1907 , Opt_ExistentialQuantification
1909 , Opt_PostfixOperators
1911 , Opt_LiberalTypeSynonyms
1915 , Opt_ParallelListComp
1916 , Opt_EmptyDataDecls
1917 , Opt_KindSignatures
1918 , Opt_GeneralizedNewtypeDeriving
1919 , Opt_TypeFamilies ]
1921 -- -----------------------------------------------------------------------------
1922 -- Parsing the dynamic flags.
1924 -- | Parse dynamic flags from a list of command line arguments. Returns the
1925 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1926 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1927 -- flags or missing arguments).
1928 parseDynamicFlags :: Monad m =>
1929 DynFlags -> [Located String]
1930 -> m (DynFlags, [Located String], [Located String])
1931 -- ^ Updated 'DynFlags', left-over arguments, and
1932 -- list of warnings.
1933 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1935 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1936 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1937 parseDynamicNoPackageFlags :: Monad m =>
1938 DynFlags -> [Located String]
1939 -> m (DynFlags, [Located String], [Located String])
1940 -- ^ Updated 'DynFlags', left-over arguments, and
1941 -- list of warnings.
1942 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1944 parseDynamicFlags_ :: Monad m =>
1945 DynFlags -> [Located String] -> Bool
1946 -> m (DynFlags, [Located String], [Located String])
1947 parseDynamicFlags_ dflags0 args pkg_flags = do
1948 -- XXX Legacy support code
1949 -- We used to accept things like
1950 -- optdep-f -optdepdepend
1951 -- optdep-f -optdep depend
1952 -- optdep -f -optdepdepend
1953 -- optdep -f -optdep depend
1954 -- but the spaces trip up proper argument handling. So get rid of them.
1955 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1956 f (x : xs) = x : f xs
1960 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1961 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1962 | otherwise = dynamic_flags
1964 let ((leftover, errs, warns), dflags1)
1965 = runCmdLine (processArgs flag_spec args') dflags0
1966 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1968 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1969 -- isn't up to the job. We know that if hscTarget == HscC, then the
1970 -- user has explicitly used -fvia-C, because -fasm is the default,
1971 -- unless there is no NCG on this platform. The latter case is
1972 -- checked when the -fPIC flag is parsed.
1974 let (pic_warns, dflags2) =
1975 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1976 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1977 dflags1{ hscTarget = HscAsm })
1980 return (dflags2, leftover, pic_warns ++ warns)
1982 type DynP = CmdLineP DynFlags
1984 upd :: (DynFlags -> DynFlags) -> DynP ()
1986 dfs <- getCmdLineState
1987 putCmdLineState $! (f dfs)
1989 --------------------------
1990 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1991 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1992 ; mapM_ setDynFlag deps }
1994 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1995 -- When you set f, set the ones it implies
1996 -- NB: use setDynFlag recursively, in case the implied flags
1997 -- implies further flags
1998 -- When you un-set f, however, we don't un-set the things it implies
1999 -- (except for -fno-glasgow-exts, which is treated specially)
2001 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
2003 --------------------------
2004 setDumpFlag :: DynFlag -> OptKind DynP
2005 setDumpFlag dump_flag
2006 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
2008 -- Certain dumpy-things are really interested in what's going
2009 -- on during recompilation checking, so in those cases we
2010 -- don't want to turn it off.
2011 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
2012 Opt_D_dump_hi_diffs]
2014 forceRecompile :: DynP ()
2015 -- Whenver we -ddump, force recompilation (by switching off the
2016 -- recompilation checker), else you don't see the dump! However,
2017 -- don't switch it off in --make mode, else *everything* gets
2018 -- recompiled which probably isn't what you want
2019 forceRecompile = do { dfs <- getCmdLineState
2020 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2022 force_recomp dfs = isOneShot (ghcMode dfs)
2024 setVerboseCore2Core :: DynP ()
2025 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
2027 upd (\s -> s { shouldDumpSimplPhase = const True })
2029 setDumpSimplPhases :: String -> DynP ()
2030 setDumpSimplPhases s = do forceRecompile
2031 upd (\s -> s { shouldDumpSimplPhase = spec })
2033 spec :: SimplifierMode -> Bool
2035 . map (join (&&) . map match . split ':')
2041 join :: (Bool -> Bool -> Bool)
2042 -> [SimplifierMode -> Bool]
2043 -> SimplifierMode -> Bool
2044 join _ [] = const True
2045 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2047 match :: String -> SimplifierMode -> Bool
2048 match "" = const True
2049 match s = case reads s of
2050 [(n,"")] -> phase_num n
2053 phase_num :: Int -> SimplifierMode -> Bool
2054 phase_num n (SimplPhase k _) = n == k
2055 phase_num _ _ = False
2057 phase_name :: String -> SimplifierMode -> Bool
2058 phase_name s SimplGently = s == "gentle"
2059 phase_name s (SimplPhase _ ss) = s `elem` ss
2061 setVerbosity :: Maybe Int -> DynP ()
2062 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2064 addCmdlineHCInclude :: String -> DynP ()
2065 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2067 extraPkgConf_ :: FilePath -> DynP ()
2068 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2070 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2072 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2074 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2076 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2078 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2080 setPackageName :: String -> DynFlags -> DynFlags
2081 setPackageName p s = s{ thisPackage = stringToPackageId p }
2083 -- If we're linking a binary, then only targets that produce object
2084 -- code are allowed (requests for other target types are ignored).
2085 setTarget :: HscTarget -> DynP ()
2086 setTarget l = upd set
2089 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2092 -- Changes the target only if we're compiling object code. This is
2093 -- used by -fasm and -fvia-C, which switch from one to the other, but
2094 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2095 -- can be safely used in an OPTIONS_GHC pragma.
2096 setObjTarget :: HscTarget -> DynP ()
2097 setObjTarget l = upd set
2100 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2103 setOptLevel :: Int -> DynFlags -> DynFlags
2104 setOptLevel n dflags
2105 | hscTarget dflags == HscInterpreted && n > 0
2107 -- not in IO any more, oh well:
2108 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2110 = updOptLevel n dflags
2113 -- -Odph is equivalent to
2115 -- -O2 optimise as much as possible
2116 -- -fno-method-sharing sharing specialisation defeats fusion
2118 -- -fdicts-cheap always inline dictionaries
2119 -- -fmax-simplifier-iterations20 this is necessary sometimes
2120 -- -fsimplifier-phases=3 we use an additional simplifier phase
2122 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2123 -- -fno-spec-constr-count SpecConstr as much as possible
2124 -- -finline-enough-args hack to prevent excessive inlining
2126 setDPHOpt :: DynFlags -> DynFlags
2127 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2129 , specConstrThreshold = Nothing
2130 , specConstrCount = Nothing
2132 `dopt_set` Opt_DictsCheap
2133 `dopt_unset` Opt_MethodSharing
2134 `dopt_set` Opt_InlineIfEnoughArgs
2136 data DPHBackend = DPHPar
2139 deriving(Eq, Ord, Enum, Show)
2141 setDPHBackend :: DPHBackend -> DynP ()
2142 setDPHBackend backend
2144 upd $ \dflags -> dflags { dphBackend = backend }
2145 mapM_ exposePackage (dph_packages backend)
2147 dph_packages DPHThis = []
2148 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2149 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2151 dphPackage :: DynFlags -> PackageId
2152 dphPackage dflags = case dphBackend dflags of
2153 DPHPar -> dphParPackageId
2154 DPHSeq -> dphSeqPackageId
2155 DPHThis -> thisPackage dflags
2157 setMainIs :: String -> DynP ()
2159 | not (null main_fn) && isLower (head main_fn)
2160 -- The arg looked like "Foo.Bar.baz"
2161 = upd $ \d -> d{ mainFunIs = Just main_fn,
2162 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2164 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2165 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2167 | otherwise -- The arg looked like "baz"
2168 = upd $ \d -> d{ mainFunIs = Just arg }
2170 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2172 -----------------------------------------------------------------------------
2173 -- Paths & Libraries
2175 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2177 -- -i on its own deletes the import paths
2178 addImportPath "" = upd (\s -> s{importPaths = []})
2179 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2183 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2186 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2188 addFrameworkPath p =
2189 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2191 #ifndef mingw32_TARGET_OS
2192 split_marker :: Char
2193 split_marker = ':' -- not configurable (ToDo)
2196 splitPathList :: String -> [String]
2197 splitPathList s = filter notNull (splitUp s)
2198 -- empty paths are ignored: there might be a trailing
2199 -- ':' in the initial list, for example. Empty paths can
2200 -- cause confusion when they are translated into -I options
2201 -- for passing to gcc.
2203 #ifndef mingw32_TARGET_OS
2204 splitUp xs = split split_marker xs
2206 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2208 -- That is, if "foo:bar:baz" is used, this interpreted as
2209 -- consisting of three entries, 'foo', 'bar', 'baz'.
2210 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2211 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2213 -- Notice that no attempt is made to fully replace the 'standard'
2214 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2215 -- that this will cause too much breakage for users & ':' will
2216 -- work fine even with DOS paths, if you're not insisting on being silly.
2219 splitUp (x:':':div:xs) | div `elem` dir_markers
2220 = ((x:':':div:p): splitUp rs)
2222 (p,rs) = findNextPath xs
2223 -- we used to check for existence of the path here, but that
2224 -- required the IO monad to be threaded through the command-line
2225 -- parser which is quite inconvenient. The
2226 splitUp xs = cons p (splitUp rs)
2228 (p,rs) = findNextPath xs
2233 -- will be called either when we've consumed nought or the
2234 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2235 -- finding the next split marker.
2237 case break (`elem` split_markers) xs of
2238 (p, _:ds) -> (p, ds)
2241 split_markers :: [Char]
2242 split_markers = [':', ';']
2244 dir_markers :: [Char]
2245 dir_markers = ['/', '\\']
2248 -- -----------------------------------------------------------------------------
2249 -- tmpDir, where we store temporary files.
2251 setTmpDir :: FilePath -> DynFlags -> DynFlags
2252 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2253 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2254 -- seem necessary now --SDM 7/2/2008
2256 -----------------------------------------------------------------------------
2259 setOptHpcDir :: String -> DynP ()
2260 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2262 -----------------------------------------------------------------------------
2263 -- Via-C compilation stuff
2265 -- There are some options that we need to pass to gcc when compiling
2266 -- Haskell code via C, but are only supported by recent versions of
2267 -- gcc. The configure script decides which of these options we need,
2268 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2269 -- read before each via-C compilation. The advantage of having these
2270 -- in a separate file is that the file can be created at install-time
2271 -- depending on the available gcc version, and even re-generated later
2272 -- if gcc is upgraded.
2274 -- The options below are not dependent on the version of gcc, only the
2277 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2278 [String]) -- for registerised HC compilations
2279 machdepCCOpts _dflags
2280 #if alpha_TARGET_ARCH
2282 #ifdef HAVE_THREADED_RTS_SUPPORT
2286 -- For now, to suppress the gcc warning "call-clobbered
2287 -- register used for global register variable", we simply
2288 -- disable all warnings altogether using the -w flag. Oh well.
2290 #elif hppa_TARGET_ARCH
2291 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2292 -- (very nice, but too bad the HP /usr/include files don't agree.)
2293 = ( ["-D_HPUX_SOURCE"], [] )
2295 #elif m68k_TARGET_ARCH
2296 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2297 -- popping of args to routines to be explicit; if we let things
2298 -- be deferred 'til after an STGJUMP, imminent death is certain!
2300 -- -fomit-frame-pointer : *don't*
2301 -- It's better to have a6 completely tied up being a frame pointer
2302 -- rather than let GCC pick random things to do with it.
2303 -- (If we want to steal a6, then we would try to do things
2304 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2305 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2307 #elif i386_TARGET_ARCH
2308 -- -fno-defer-pop : basically the same game as for m68k
2310 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2311 -- the fp (%ebp) for our register maps.
2312 = let n_regs = stolen_x86_regs _dflags
2315 #if darwin_TARGET_OS
2316 -- By default, gcc on OS X will generate SSE
2317 -- instructions, which need things 16-byte aligned,
2318 -- but we don't 16-byte align things. Thus drop
2319 -- back to generic i686 compatibility. Trac #2983.
2321 -- Since Snow Leopard (10.6), gcc defaults to x86_64.
2322 ["-march=i686", "-m32"],
2324 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2328 "-fomit-frame-pointer",
2329 -- we want -fno-builtin, because when gcc inlines
2330 -- built-in functions like memcpy() it tends to
2331 -- run out of registers, requiring -monly-n-regs
2333 "-DSTOLEN_X86_REGS="++show n_regs ]
2336 #elif ia64_TARGET_ARCH
2337 = ( [], ["-fomit-frame-pointer", "-G0"] )
2339 #elif x86_64_TARGET_ARCH
2341 #if darwin_TARGET_OS
2346 ["-fomit-frame-pointer",
2347 "-fno-asynchronous-unwind-tables",
2348 -- the unwind tables are unnecessary for HC code,
2349 -- and get in the way of -split-objs. Another option
2350 -- would be to throw them away in the mangler, but this
2353 -- calling builtins like strlen() using the FFI can
2354 -- cause gcc to run out of regs, so use the external
2358 #elif sparc_TARGET_ARCH
2360 -- For now, to suppress the gcc warning "call-clobbered
2361 -- register used for global register variable", we simply
2362 -- disable all warnings altogether using the -w flag. Oh well.
2364 #elif powerpc_apple_darwin_TARGET
2366 -- Disable Apple's precompiling preprocessor. It's a great thing
2367 -- for "normal" programs, but it doesn't support register variable
2369 = ( [], ["-no-cpp-precomp"] )
2374 picCCOpts :: DynFlags -> [String]
2376 #if darwin_TARGET_OS
2377 -- Apple prefers to do things the other way round.
2378 -- PIC is on by default.
2379 -- -mdynamic-no-pic:
2380 -- Turn off PIC code generation.
2382 -- Don't generate "common" symbols - these are unwanted
2383 -- in dynamic libraries.
2386 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2388 = ["-mdynamic-no-pic"]
2389 #elif mingw32_TARGET_OS
2390 -- no -fPIC for Windows
2392 = ["-U __PIC__","-D__PIC__"]
2396 | opt_PIC || not opt_Static
2397 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2402 -- -----------------------------------------------------------------------------
2406 can_split = cSplitObjs == "YES"
2408 -- -----------------------------------------------------------------------------
2411 data Printable = String String
2412 | FromDynFlags (DynFlags -> String)
2414 compilerInfo :: [(String, Printable)]
2415 compilerInfo = [("Project name", String cProjectName),
2416 ("Project version", String cProjectVersion),
2417 ("Booter version", String cBooterVersion),
2418 ("Stage", String cStage),
2419 ("Have interpreter", String cGhcWithInterpreter),
2420 ("Object splitting", String cSplitObjs),
2421 ("Have native code generator", String cGhcWithNativeCodeGen),
2422 ("Support SMP", String cGhcWithSMP),
2423 ("Unregisterised", String cGhcUnregisterised),
2424 ("Tables next to code", String cGhcEnableTablesNextToCode),
2425 ("Win32 DLLs", String cEnableWin32DLLs),
2426 ("RTS ways", String cGhcRTSWays),
2427 ("Leading underscore", String cLeadingUnderscore),
2428 ("Debug on", String (show debugIsOn)),
2429 ("LibDir", FromDynFlags topDir)