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
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 [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
549 | ExposePackageId String
551 | IgnorePackage String
554 defaultHscTarget :: HscTarget
555 defaultHscTarget = defaultObjectTarget
557 -- | The 'HscTarget' value corresponding to the default way to create
558 -- object files on the current platform.
559 defaultObjectTarget :: HscTarget
561 | cGhcWithNativeCodeGen == "YES" = HscAsm
566 | Wrapped (Maybe String)
570 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
571 initDynFlags :: DynFlags -> IO DynFlags
572 initDynFlags dflags = do
573 -- someday these will be dynamic flags
574 ways <- readIORef v_Ways
575 refFilesToClean <- newIORef []
576 refDirsToClean <- newIORef emptyFM
579 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
580 rtsBuildTag = mkBuildTag ways,
581 filesToClean = refFilesToClean,
582 dirsToClean = refDirsToClean
585 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
586 -- and must be fully initialized by 'GHC.newSession' first.
587 defaultDynFlags :: DynFlags
590 ghcMode = CompManager,
591 ghcLink = LinkBinary,
594 hscTarget = defaultHscTarget,
600 maxSimplIterations = 4,
601 shouldDumpSimplPhase = const False,
603 specConstrThreshold = Just 200,
604 specConstrCount = Just 3,
605 liberateCaseThreshold = Just 200,
606 #ifndef OMIT_NATIVE_CODEGEN
607 targetPlatform = defaultTargetPlatform,
610 cmdlineHcIncludes = [],
614 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
618 thisPackage = mainPackageId,
624 objectSuf = phaseInputExt StopLn,
625 hcSuf = phaseInputExt HCc,
628 outputFile = Nothing,
630 dynLibLoader = SystemDependent,
631 dumpPrefix = Nothing,
632 dumpPrefixForce = Nothing,
636 cmdlineFrameworks = [],
637 tmpDir = cDEFAULT_TMPDIR,
643 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
654 pkgDatabase = Nothing,
655 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
656 ways = panic "defaultDynFlags: No ways",
657 buildTag = panic "defaultDynFlags: No buildTag",
658 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
660 -- initSysTools fills all these in
661 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
662 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
663 topDir = panic "defaultDynFlags: No topDir",
664 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
665 pgm_L = panic "defaultDynFlags: No pgm_L",
666 pgm_P = panic "defaultDynFlags: No pgm_P",
667 pgm_F = panic "defaultDynFlags: No pgm_F",
668 pgm_c = panic "defaultDynFlags: No pgm_c",
669 pgm_m = panic "defaultDynFlags: No pgm_m",
670 pgm_s = panic "defaultDynFlags: No pgm_s",
671 pgm_a = panic "defaultDynFlags: No pgm_a",
672 pgm_l = panic "defaultDynFlags: No pgm_l",
673 pgm_dll = panic "defaultDynFlags: No pgm_dll",
674 pgm_T = panic "defaultDynFlags: No pgm_T",
675 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
676 pgm_windres = panic "defaultDynFlags: No pgm_windres",
677 -- end of initSysTools values
679 depMakefile = "Makefile",
680 depIncludePkgDeps = False,
683 -- end of ghc -M values
684 filesToClean = panic "defaultDynFlags: No filesToClean",
685 dirsToClean = panic "defaultDynFlags: No dirsToClean",
686 haddockOptions = Nothing,
688 Opt_AutoLinkPackages,
689 Opt_ReadUserPackageConf,
691 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
692 -- behaviour the default, to see if anyone notices
696 Opt_MonomorphismRestriction,
707 Opt_PrintBindContents
709 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
710 -- The default -O0 options
713 log_action = \severity srcSpan style msg ->
715 SevInfo -> printErrs (msg style)
716 SevFatal -> printErrs (msg style)
719 printErrs ((mkLocMessage srcSpan msg) style)
720 -- careful (#2302): printErrs prints in UTF-8, whereas
721 -- converting to string first and using hPutStr would
722 -- just emit the low 8 bits of each unicode char.
729 0 | print errors & warnings only
730 1 | minimal verbosity: print "compiling M ... done." for each module.
731 2 | equivalent to -dshow-passes
732 3 | equivalent to existing "ghc -v"
733 4 | "ghc -v -ddump-most"
734 5 | "ghc -v -ddump-all"
737 -- | Test whether a 'DynFlag' is set
738 dopt :: DynFlag -> DynFlags -> Bool
739 dopt f dflags = f `elem` (flags dflags)
742 dopt_set :: DynFlags -> DynFlag -> DynFlags
743 dopt_set dfs f = dfs{ flags = f : flags dfs }
745 -- | Unset a 'DynFlag'
746 dopt_unset :: DynFlags -> DynFlag -> DynFlags
747 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
749 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
750 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
751 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
752 -> [a] -- ^ Correctly ordered extracted options
753 getOpts dflags opts = reverse (opts dflags)
754 -- We add to the options from the front, so we need to reverse the list
756 -- | Gets the verbosity flag for the current verbosity level. This is fed to
757 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
758 getVerbFlag :: DynFlags -> String
760 | verbosity dflags >= 3 = "-v"
763 setObjectDir, setHiDir, setStubDir, setOutputDir,
764 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
765 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
766 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
767 addCmdlineFramework, addHaddockOpts
768 :: String -> DynFlags -> DynFlags
769 setOutputFile, setOutputHi, setDumpPrefixForce
770 :: Maybe String -> DynFlags -> DynFlags
772 setObjectDir f d = d{ objectDir = Just f}
773 setHiDir f d = d{ hiDir = Just f}
774 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
775 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
776 -- \#included from the .hc file when compiling with -fvia-C.
777 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
779 setObjectSuf f d = d{ objectSuf = f}
780 setHiSuf f d = d{ hiSuf = f}
781 setHcSuf f d = d{ hcSuf = f}
783 setOutputFile f d = d{ outputFile = f}
784 setOutputHi f d = d{ outputHi = f}
786 parseDynLibLoaderMode f d =
788 ("deploy", "") -> d{ dynLibLoader = Deployable }
789 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
790 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
791 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
792 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
793 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
795 setDumpPrefixForce f d = d { dumpPrefixForce = f}
797 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
798 -- Config.hs should really use Option.
799 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
801 setPgmL f d = d{ pgm_L = f}
802 setPgmF f d = d{ pgm_F = f}
803 setPgmc f d = d{ pgm_c = (f,[])}
804 setPgmm f d = d{ pgm_m = (f,[])}
805 setPgms f d = d{ pgm_s = (f,[])}
806 setPgma f d = d{ pgm_a = (f,[])}
807 setPgml f d = d{ pgm_l = (f,[])}
808 setPgmdll f d = d{ pgm_dll = (f,[])}
809 setPgmwindres f d = d{ pgm_windres = f}
811 addOptL f d = d{ opt_L = f : opt_L d}
812 addOptP f d = d{ opt_P = f : opt_P d}
813 addOptF f d = d{ opt_F = f : opt_F d}
814 addOptc f d = d{ opt_c = f : opt_c d}
815 addOptm f d = d{ opt_m = f : opt_m d}
816 addOpta f d = d{ opt_a = f : opt_a d}
817 addOptl f d = d{ opt_l = f : opt_l d}
818 addOptwindres f d = d{ opt_windres = f : opt_windres d}
820 setDepMakefile :: FilePath -> DynFlags -> DynFlags
821 setDepMakefile f d = d { depMakefile = deOptDep f }
823 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
824 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
826 addDepExcludeMod :: String -> DynFlags -> DynFlags
828 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
830 addDepSuffix :: FilePath -> DynFlags -> DynFlags
831 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
834 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
835 -- we need to strip the "-optdep" off of the arg
836 deOptDep :: String -> String
837 deOptDep x = case stripPrefix "-optdep" x of
841 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
843 addHaddockOpts f d = d{ haddockOptions = Just f}
845 -- -----------------------------------------------------------------------------
846 -- Command-line options
848 -- | When invoking external tools as part of the compilation pipeline, we
849 -- pass these a sequence of options on the command-line. Rather than
850 -- just using a list of Strings, we use a type that allows us to distinguish
851 -- between filepaths and 'other stuff'. The reason for this is that
852 -- this type gives us a handle on transforming filenames, and filenames only,
853 -- to whatever format they're expected to be on a particular platform.
855 = FileOption -- an entry that _contains_ filename(s) / filepaths.
856 String -- a non-filepath prefix that shouldn't be
857 -- transformed (e.g., "/out=")
858 String -- the filepath/filename portion
861 showOpt :: Option -> String
862 showOpt (FileOption pre f) = pre ++ f
863 showOpt (Option s) = s
865 -----------------------------------------------------------------------------
866 -- Setting the optimisation level
868 updOptLevel :: Int -> DynFlags -> DynFlags
869 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
871 = dfs2{ optLevel = final_n }
873 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
874 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
875 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
877 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
878 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
880 optLevelFlags :: [([Int], DynFlag)]
882 = [ ([0], Opt_IgnoreInterfacePragmas)
883 , ([0], Opt_OmitInterfacePragmas)
885 , ([1,2], Opt_IgnoreAsserts)
886 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
888 , ([1,2], Opt_DoEtaReduction)
889 , ([1,2], Opt_CaseMerge)
890 , ([1,2], Opt_Strictness)
892 , ([1,2], Opt_FullLaziness)
894 , ([2], Opt_LiberateCase)
895 , ([2], Opt_SpecConstr)
897 -- , ([2], Opt_StaticArgumentTransformation)
898 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
899 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
900 -- several improvements to the heuristics, and I'm concerned that without
901 -- those changes SAT will interfere with some attempts to write "high
902 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
903 -- this year. In particular, the version in HEAD lacks the tail call
904 -- criterion, so many things that look like reasonable loops will be
905 -- turned into functions with extra (unneccesary) thunk creation.
907 , ([0,1,2], Opt_DoLambdaEtaExpansion)
908 -- This one is important for a tiresome reason:
909 -- we want to make sure that the bindings for data
910 -- constructors are eta-expanded. This is probably
911 -- a good thing anyway, but it seems fragile.
914 -- -----------------------------------------------------------------------------
915 -- Standard sets of warning options
917 standardWarnings :: [DynFlag]
919 = [ Opt_WarnWarningsDeprecations,
920 Opt_WarnDeprecatedFlags,
921 Opt_WarnUnrecognisedPragmas,
922 Opt_WarnOverlappingPatterns,
923 Opt_WarnMissingFields,
924 Opt_WarnMissingMethods,
925 Opt_WarnDuplicateExports,
926 Opt_WarnLazyUnliftedBindings,
927 Opt_WarnDodgyForeignImports,
931 minusWOpts :: [DynFlag]
933 = standardWarnings ++
934 [ Opt_WarnUnusedBinds,
935 Opt_WarnUnusedMatches,
936 Opt_WarnUnusedImports,
937 Opt_WarnIncompletePatterns,
938 Opt_WarnDodgyExports,
942 minusWallOpts :: [DynFlag]
945 [ Opt_WarnTypeDefaults,
946 Opt_WarnNameShadowing,
953 -- minuswRemovesOpts should be every warning option
954 minuswRemovesOpts :: [DynFlag]
957 [Opt_WarnImplicitPrelude,
958 Opt_WarnIncompletePatternsRecUpd,
959 Opt_WarnSimplePatterns,
960 Opt_WarnMonomorphism,
961 Opt_WarnUnrecognisedPragmas,
965 -- -----------------------------------------------------------------------------
966 -- CoreToDo: abstraction of core-to-core passes to run.
968 data CoreToDo -- These are diff core-to-core passes,
969 -- which may be invoked in any order,
970 -- as many times as you like.
972 = CoreDoSimplify -- The core-to-core simplifier.
975 -- Each run of the simplifier can take a different
976 -- set of simplifier-specific flags.
978 | CoreDoFloatOutwards FloatOutSwitches
983 | CoreDoWorkerWrapper
986 | CoreDoOldStrictness
989 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
990 -- matching this string
991 | CoreDoVectorisation PackageId
992 | CoreDoNothing -- Useful when building up
993 | CoreDoPasses [CoreToDo] -- lists of these things
996 data SimplifierMode -- See comments in SimplMonad
998 | SimplPhase Int [String]
1000 instance Outputable SimplifierMode where
1001 ppr SimplGently = ptext (sLit "gentle")
1002 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1005 data SimplifierSwitch
1006 = MaxSimplifierIterations Int
1010 data FloatOutSwitches = FloatOutSwitches {
1011 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1012 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1013 -- even if they do not escape a lambda
1016 instance Outputable FloatOutSwitches where
1017 ppr = pprFloatOutSwitches
1019 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1020 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1021 <+> pp_not (floatOutConstants sw) <+> text "constants"
1024 pp_not False = text "not"
1026 -- | Switches that specify the minimum amount of floating out
1027 -- gentleFloatOutSwitches :: FloatOutSwitches
1028 -- gentleFloatOutSwitches = FloatOutSwitches False False
1030 -- | Switches that do not specify floating out of lambdas, just of constants
1031 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1032 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1035 -- The core-to-core pass ordering is derived from the DynFlags:
1036 runWhen :: Bool -> CoreToDo -> CoreToDo
1037 runWhen True do_this = do_this
1038 runWhen False _ = CoreDoNothing
1040 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1041 runMaybe (Just x) f = f x
1042 runMaybe Nothing _ = CoreDoNothing
1044 getCoreToDo :: DynFlags -> [CoreToDo]
1046 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1047 | otherwise = core_todo
1049 opt_level = optLevel dflags
1050 phases = simplPhases dflags
1051 max_iter = maxSimplIterations dflags
1052 strictness = dopt Opt_Strictness dflags
1053 full_laziness = dopt Opt_FullLaziness dflags
1054 cse = dopt Opt_CSE dflags
1055 spec_constr = dopt Opt_SpecConstr dflags
1056 liberate_case = dopt Opt_LiberateCase dflags
1057 rule_check = ruleCheck dflags
1058 static_args = dopt Opt_StaticArgumentTransformation dflags
1060 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1062 simpl_phase phase names iter
1064 [ CoreDoSimplify (SimplPhase phase names) [
1065 MaxSimplifierIterations iter
1067 maybe_rule_check phase
1071 = runWhen (dopt Opt_Vectorise dflags)
1072 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1075 -- By default, we have 2 phases before phase 0.
1077 -- Want to run with inline phase 2 after the specialiser to give
1078 -- maximum chance for fusion to work before we inline build/augment
1079 -- in phase 1. This made a difference in 'ansi' where an
1080 -- overloaded function wasn't inlined till too late.
1082 -- Need phase 1 so that build/augment get
1083 -- inlined. I found that spectral/hartel/genfft lost some useful
1084 -- strictness in the function sumcode' if augment is not inlined
1085 -- before strictness analysis runs
1086 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1087 | phase <- [phases, phases-1 .. 1] ]
1090 -- initial simplify: mk specialiser happy: minimum effort please
1091 simpl_gently = CoreDoSimplify SimplGently [
1092 -- Simplify "gently"
1093 -- Don't inline anything till full laziness has bitten
1094 -- In particular, inlining wrappers inhibits floating
1095 -- e.g. ...(case f x of ...)...
1096 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1097 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1098 -- and now the redex (f x) isn't floatable any more
1099 -- Similarly, don't apply any rules until after full
1100 -- laziness. Notably, list fusion can prevent floating.
1102 NoCaseOfCase, -- Don't do case-of-case transformations.
1103 -- This makes full laziness work better
1104 MaxSimplifierIterations max_iter
1108 if opt_level == 0 then
1110 simpl_phase 0 ["final"] max_iter]
1111 else {- opt_level >= 1 -} [
1113 -- We want to do the static argument transform before full laziness as it
1114 -- may expose extra opportunities to float things outwards. However, to fix
1115 -- up the output of the transformation we need at do at least one simplify
1116 -- after this before anything else
1117 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1119 -- We run vectorisation here for now, but we might also try to run
1123 -- initial simplify: mk specialiser happy: minimum effort please
1126 -- Specialisation is best done before full laziness
1127 -- so that overloaded functions have all their dictionary lambdas manifest
1130 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1131 -- Was: gentleFloatOutSwitches
1132 -- I have no idea why, but not floating constants to top level is
1133 -- very bad in some cases.
1134 -- Notably: p_ident in spectral/rewrite
1135 -- Changing from "gentle" to "constantsOnly" improved
1136 -- rewrite's allocation by 19%, and made 0.0% difference
1137 -- to any other nofib benchmark
1143 -- Phase 0: allow all Ids to be inlined now
1144 -- This gets foldr inlined before strictness analysis
1146 -- At least 3 iterations because otherwise we land up with
1147 -- huge dead expressions because of an infelicity in the
1149 -- let k = BIG in foldr k z xs
1150 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1151 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1153 simpl_phase 0 ["main"] (max max_iter 3),
1156 #ifdef OLD_STRICTNESS
1157 CoreDoOldStrictness,
1159 runWhen strictness (CoreDoPasses [
1161 CoreDoWorkerWrapper,
1163 simpl_phase 0 ["post-worker-wrapper"] max_iter
1166 runWhen full_laziness
1167 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1168 -- nofib/spectral/hartel/wang doubles in speed if you
1169 -- do full laziness late in the day. It only happens
1170 -- after fusion and other stuff, so the early pass doesn't
1171 -- catch it. For the record, the redex is
1172 -- f_el22 (f_el21 r_midblock)
1175 runWhen cse CoreCSE,
1176 -- We want CSE to follow the final full-laziness pass, because it may
1177 -- succeed in commoning up things floated out by full laziness.
1178 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1184 -- Case-liberation for -O2. This should be after
1185 -- strictness analysis and the simplification which follows it.
1186 runWhen liberate_case (CoreDoPasses [
1188 simpl_phase 0 ["post-liberate-case"] max_iter
1189 ]), -- Run the simplifier after LiberateCase to vastly
1190 -- reduce the possiblility of shadowing
1191 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1193 runWhen spec_constr CoreDoSpecConstr,
1197 -- Final clean-up simplification:
1198 simpl_phase 0 ["final"] max_iter
1201 -- -----------------------------------------------------------------------------
1202 -- StgToDo: abstraction of stg-to-stg passes to run.
1205 = StgDoMassageForProfiling -- should be (next to) last
1206 -- There's also setStgVarInfo, but its absolute "lastness"
1207 -- is so critical that it is hardwired in (no flag).
1210 getStgToDo :: DynFlags -> [StgToDo]
1212 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1215 stg_stats = dopt Opt_StgStats dflags
1217 todo1 = if stg_stats then [D_stg_stats] else []
1219 todo2 | WayProf `elem` wayNames dflags
1220 = StgDoMassageForProfiling : todo1
1224 -- -----------------------------------------------------------------------------
1227 allFlags :: [String]
1228 allFlags = map ('-':) $
1229 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1230 map ("fno-"++) flags ++
1231 map ("f"++) flags ++
1232 map ("X"++) supportedLanguages ++
1233 map ("XNo"++) supportedLanguages
1234 where ok (PrefixPred _ _) = False
1236 flags = [ name | (name, _, _) <- fFlags ]
1238 dynamic_flags :: [Flag DynP]
1240 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1241 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1242 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1243 , Flag "#include" (HasArg (addCmdlineHCInclude))
1244 (Deprecated "No longer has any effect")
1245 , Flag "v" (OptIntSuffix setVerbosity) Supported
1247 ------- Specific phases --------------------------------------------
1248 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1249 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1250 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1251 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1252 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1253 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1254 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1255 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1256 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1257 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1259 , Flag "optL" (HasArg (upd . addOptL)) Supported
1260 , Flag "optP" (HasArg (upd . addOptP)) Supported
1261 , Flag "optF" (HasArg (upd . addOptF)) Supported
1262 , Flag "optc" (HasArg (upd . addOptc)) Supported
1263 , Flag "optm" (HasArg (upd . addOptm)) Supported
1264 , Flag "opta" (HasArg (upd . addOpta)) Supported
1265 , Flag "optl" (HasArg (upd . addOptl)) Supported
1266 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1269 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1272 -------- ghc -M -----------------------------------------------------
1273 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1274 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1275 (Deprecated "Use -dep-suffix instead")
1276 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1277 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1278 (Deprecated "Use -dep-makefile instead")
1279 , Flag "optdep-w" (NoArg (return ()))
1280 (Deprecated "-optdep-w doesn't do anything")
1281 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1282 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1283 (Deprecated "Use -include-pkg-deps instead")
1284 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1285 (Deprecated "Use -include-pkg-deps instead")
1286 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1287 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1288 (Deprecated "Use -exclude-module instead")
1289 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1290 (Deprecated "Use -exclude-module instead")
1292 -------- Linking ----------------------------------------------------
1293 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1295 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1296 (Deprecated "Use -c instead")
1297 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1299 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1302 ------- Libraries ---------------------------------------------------
1303 , Flag "L" (Prefix addLibraryPath ) Supported
1304 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1306 ------- Frameworks --------------------------------------------------
1307 -- -framework-path should really be -F ...
1308 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1309 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1311 ------- Output Redirection ------------------------------------------
1312 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1313 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1314 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1315 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1316 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1317 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1318 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1319 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1320 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1321 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1322 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1325 ------- Keeping temporary files -------------------------------------
1326 -- These can be singular (think ghc -c) or plural (think ghc --make)
1327 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1328 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1329 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1330 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1331 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1332 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1333 -- This only makes sense as plural
1334 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1336 ------- Miscellaneous ----------------------------------------------
1337 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1338 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1339 , Flag "main-is" (SepArg setMainIs ) Supported
1340 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1341 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1342 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1344 ------- recompilation checker --------------------------------------
1345 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1346 (Deprecated "Use -fno-force-recomp instead")
1347 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1348 (Deprecated "Use -fforce-recomp instead")
1350 ------ HsCpp opts ---------------------------------------------------
1351 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1352 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1354 ------- Include/Import Paths ----------------------------------------
1355 , Flag "I" (Prefix addIncludePath) Supported
1356 , Flag "i" (OptPrefix addImportPath ) Supported
1358 ------ Debugging ----------------------------------------------------
1359 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1361 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1363 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1365 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1367 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1369 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1371 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1373 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1375 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1377 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1379 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1381 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1383 , Flag "ddump-asm-regalloc-stages"
1384 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1386 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1388 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1390 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1392 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1394 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1396 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1398 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1400 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1402 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1404 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1406 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1408 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1410 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1412 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1414 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1416 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1418 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1420 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1422 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1424 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1426 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1428 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1430 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1432 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1434 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1436 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1438 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1440 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1442 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1444 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1446 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1448 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1450 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1452 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1454 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1456 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1458 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1460 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1462 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1464 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1466 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1468 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1470 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1472 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1475 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1477 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1479 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1481 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1483 , Flag "dshow-passes"
1484 (NoArg (do forceRecompile
1485 setVerbosity (Just 2)))
1487 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1490 ------ Machine dependant (-m<blah>) stuff ---------------------------
1492 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1494 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1496 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1499 ------ Warning opts -------------------------------------------------
1500 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1502 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1504 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1506 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1508 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1509 (Deprecated "Use -w instead")
1510 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1513 ------ Optimisation flags ------------------------------------------
1514 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1515 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1516 (Deprecated "Use -O0 instead")
1517 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1518 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1520 -- If the number is missing, use 1
1522 , Flag "fsimplifier-phases"
1523 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1525 , Flag "fmax-simplifier-iterations"
1526 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1529 , Flag "fspec-constr-threshold"
1530 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1532 , Flag "fno-spec-constr-threshold"
1533 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1535 , Flag "fspec-constr-count"
1536 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1538 , Flag "fno-spec-constr-count"
1539 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1541 , Flag "fliberate-case-threshold"
1542 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1544 , Flag "fno-liberate-case-threshold"
1545 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1548 , Flag "frule-check"
1549 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1551 , Flag "fcontext-stack"
1552 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1555 ------ Profiling ----------------------------------------------------
1557 -- XXX Should the -f* flags be deprecated?
1558 -- They don't seem to be documented
1559 , Flag "fauto-sccs-on-all-toplevs"
1560 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1563 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1565 , Flag "no-auto-all"
1566 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1568 , Flag "fauto-sccs-on-exported-toplevs"
1569 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1572 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1575 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1577 , Flag "fauto-sccs-on-individual-cafs"
1578 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1581 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1584 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1587 ------ DPH flags ----------------------------------------------------
1590 (NoArg (setDPHBackend DPHSeq))
1593 (NoArg (setDPHBackend DPHPar))
1596 (NoArg (setDPHBackend DPHThis))
1599 ------ Compiler flags -----------------------------------------------
1601 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1602 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1603 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1605 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1606 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1607 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1609 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1611 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1614 ++ map (mkFlag True "f" setDynFlag ) fFlags
1615 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1616 ++ map (mkFlag True "X" setDynFlag ) xFlags
1617 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1619 package_flags :: [Flag DynP]
1621 ------- Packages ----------------------------------------------------
1622 Flag "package-conf" (HasArg extraPkgConf_) Supported
1623 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1625 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1626 , Flag "package-id" (HasArg exposePackageId) Supported
1627 , Flag "package" (HasArg exposePackage) Supported
1628 , Flag "hide-package" (HasArg hidePackage) Supported
1629 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1631 , Flag "ignore-package" (HasArg ignorePackage)
1633 , Flag "syslib" (HasArg exposePackage)
1634 (Deprecated "Use -package instead")
1637 mkFlag :: Bool -- ^ True <=> it should be turned on
1638 -> String -- ^ The flag prefix
1639 -> (DynFlag -> DynP ())
1640 -> (String, DynFlag, Bool -> Deprecated)
1642 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1643 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1645 deprecatedForLanguage :: String -> Bool -> Deprecated
1646 deprecatedForLanguage lang turn_on
1647 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1649 flag | turn_on = lang
1650 | otherwise = "No"++lang
1652 useInstead :: String -> Bool -> Deprecated
1653 useInstead flag turn_on
1654 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1656 no = if turn_on then "" else "no-"
1658 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1659 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1661 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1662 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1663 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1664 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1665 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1666 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1667 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1668 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1669 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1670 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1671 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1672 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1673 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1674 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1675 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1676 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1677 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1678 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1679 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1680 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1681 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1682 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1683 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1684 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1685 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1686 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1687 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1688 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1689 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1690 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1691 ( "strictness", Opt_Strictness, const Supported ),
1692 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1693 ( "full-laziness", Opt_FullLaziness, const Supported ),
1694 ( "liberate-case", Opt_LiberateCase, const Supported ),
1695 ( "spec-constr", Opt_SpecConstr, const Supported ),
1696 ( "cse", Opt_CSE, const Supported ),
1697 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1698 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1699 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1700 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1701 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1702 ( "case-merge", Opt_CaseMerge, const Supported ),
1703 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1704 ( "method-sharing", Opt_MethodSharing, const Supported ),
1705 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1706 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1707 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1708 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1709 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1710 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1711 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1712 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1713 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1714 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1715 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1716 ( "break-on-error", Opt_BreakOnError, const Supported ),
1717 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1718 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1719 ( "run-cps", Opt_RunCPS, const Supported ),
1720 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1721 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1722 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1723 ( "vectorise", Opt_Vectorise, const Supported ),
1724 ( "regs-graph", Opt_RegsGraph, const Supported ),
1725 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1726 ( "th", Opt_TemplateHaskell,
1727 deprecatedForLanguage "TemplateHaskell" ),
1728 ( "fi", Opt_ForeignFunctionInterface,
1729 deprecatedForLanguage "ForeignFunctionInterface" ),
1730 ( "ffi", Opt_ForeignFunctionInterface,
1731 deprecatedForLanguage "ForeignFunctionInterface" ),
1732 ( "arrows", Opt_Arrows,
1733 deprecatedForLanguage "Arrows" ),
1734 ( "generics", Opt_Generics,
1735 deprecatedForLanguage "Generics" ),
1736 ( "implicit-prelude", Opt_ImplicitPrelude,
1737 deprecatedForLanguage "ImplicitPrelude" ),
1738 ( "bang-patterns", Opt_BangPatterns,
1739 deprecatedForLanguage "BangPatterns" ),
1740 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1741 deprecatedForLanguage "MonomorphismRestriction" ),
1742 ( "mono-pat-binds", Opt_MonoPatBinds,
1743 deprecatedForLanguage "MonoPatBinds" ),
1744 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1745 deprecatedForLanguage "ExtendedDefaultRules" ),
1746 ( "implicit-params", Opt_ImplicitParams,
1747 deprecatedForLanguage "ImplicitParams" ),
1748 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1749 deprecatedForLanguage "ScopedTypeVariables" ),
1751 deprecatedForLanguage "PArr" ),
1752 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1753 deprecatedForLanguage "OverlappingInstances" ),
1754 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1755 deprecatedForLanguage "UndecidableInstances" ),
1756 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1757 deprecatedForLanguage "IncoherentInstances" ),
1758 ( "gen-manifest", Opt_GenManifest, const Supported ),
1759 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1760 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1761 ( "shared-implib", Opt_SharedImplib, const Supported ),
1762 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1763 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1766 supportedLanguages :: [String]
1767 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1769 -- This may contain duplicates
1770 languageOptions :: [DynFlag]
1771 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1773 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1774 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1776 ( "CPP", Opt_Cpp, const Supported ),
1777 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1778 ( "TupleSections", Opt_TupleSections, const Supported ),
1779 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1780 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1781 ( "MagicHash", Opt_MagicHash, const Supported ),
1782 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1783 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1784 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1785 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1786 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1787 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1788 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1789 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1790 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1791 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1792 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1793 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1794 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1795 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1796 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1797 ( "Arrows", Opt_Arrows, const Supported ),
1798 ( "PArr", Opt_PArr, const Supported ),
1799 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1800 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1801 ( "Generics", Opt_Generics, const Supported ),
1803 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1804 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1805 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1806 ( "RecordPuns", Opt_RecordPuns,
1807 deprecatedForLanguage "NamedFieldPuns" ),
1808 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1809 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1810 ( "GADTs", Opt_GADTs, const Supported ),
1811 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1812 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1813 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1815 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1817 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1818 -- On by default (which is not strictly H98):
1819 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1820 ( "ExplicitForAll", Opt_ExplicitForAll, const Supported ),
1821 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1822 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1823 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1824 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1825 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1827 ( "PatternSignatures", Opt_ScopedTypeVariables,
1828 deprecatedForLanguage "ScopedTypeVariables" ),
1830 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1831 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1832 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1833 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1834 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1835 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1836 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1837 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1838 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1839 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1840 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1841 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1842 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1843 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1844 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1845 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1846 ( "PackageImports", Opt_PackageImports, const Supported ),
1847 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1850 impliedFlags :: [(DynFlag, DynFlag)]
1852 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1853 , (Opt_Rank2Types, Opt_ExplicitForAll)
1854 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1855 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1856 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1857 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1859 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1860 -- be completely rigid for GADTs
1862 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1863 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1864 -- all over the place
1866 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1867 -- Note [Scoped tyvars] in TcBinds
1868 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1870 -- Record wild-cards implies field disambiguation
1871 -- Otherwise if you write (C {..}) you may well get
1872 -- stuff like " 'a' not in scope ", which is a bit silly
1873 -- if the compiler has just filled in field 'a' of constructor 'C'
1874 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1877 glasgowExtsFlags :: [DynFlag]
1878 glasgowExtsFlags = [
1879 Opt_PrintExplicitForalls
1880 , Opt_ForeignFunctionInterface
1881 , Opt_UnliftedFFITypes
1883 , Opt_ImplicitParams
1884 , Opt_ScopedTypeVariables
1886 , Opt_TypeSynonymInstances
1887 , Opt_StandaloneDeriving
1888 , Opt_DeriveDataTypeable
1890 , Opt_DeriveFoldable
1891 , Opt_DeriveTraversable
1892 , Opt_FlexibleContexts
1893 , Opt_FlexibleInstances
1894 , Opt_ConstrainedClassMethods
1895 , Opt_MultiParamTypeClasses
1896 , Opt_FunctionalDependencies
1898 , Opt_PolymorphicComponents
1899 , Opt_ExistentialQuantification
1901 , Opt_PostfixOperators
1903 , Opt_LiberalTypeSynonyms
1907 , Opt_ParallelListComp
1908 , Opt_EmptyDataDecls
1909 , Opt_KindSignatures
1910 , Opt_GeneralizedNewtypeDeriving
1911 , Opt_TypeFamilies ]
1913 -- -----------------------------------------------------------------------------
1914 -- Parsing the dynamic flags.
1916 -- | Parse dynamic flags from a list of command line arguments. Returns the
1917 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1918 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1919 -- flags or missing arguments).
1920 parseDynamicFlags :: Monad m =>
1921 DynFlags -> [Located String]
1922 -> m (DynFlags, [Located String], [Located String])
1923 -- ^ Updated 'DynFlags', left-over arguments, and
1924 -- list of warnings.
1925 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1927 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1928 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1929 parseDynamicNoPackageFlags :: Monad m =>
1930 DynFlags -> [Located String]
1931 -> m (DynFlags, [Located String], [Located String])
1932 -- ^ Updated 'DynFlags', left-over arguments, and
1933 -- list of warnings.
1934 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1936 parseDynamicFlags_ :: Monad m =>
1937 DynFlags -> [Located String] -> Bool
1938 -> m (DynFlags, [Located String], [Located String])
1939 parseDynamicFlags_ dflags0 args pkg_flags = do
1940 -- XXX Legacy support code
1941 -- We used to accept things like
1942 -- optdep-f -optdepdepend
1943 -- optdep-f -optdep depend
1944 -- optdep -f -optdepdepend
1945 -- optdep -f -optdep depend
1946 -- but the spaces trip up proper argument handling. So get rid of them.
1947 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1948 f (x : xs) = x : f xs
1952 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1953 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1954 | otherwise = dynamic_flags
1956 let ((leftover, errs, warns), dflags1)
1957 = runCmdLine (processArgs flag_spec args') dflags0
1958 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1960 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1961 -- isn't up to the job. We know that if hscTarget == HscC, then the
1962 -- user has explicitly used -fvia-C, because -fasm is the default,
1963 -- unless there is no NCG on this platform. The latter case is
1964 -- checked when the -fPIC flag is parsed.
1966 let (pic_warns, dflags2) =
1967 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1968 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1969 dflags1{ hscTarget = HscAsm })
1972 return (dflags2, leftover, pic_warns ++ warns)
1974 type DynP = CmdLineP DynFlags
1976 upd :: (DynFlags -> DynFlags) -> DynP ()
1978 dfs <- getCmdLineState
1979 putCmdLineState $! (f dfs)
1981 --------------------------
1982 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1983 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1984 ; mapM_ setDynFlag deps }
1986 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1987 -- When you set f, set the ones it implies
1988 -- NB: use setDynFlag recursively, in case the implied flags
1989 -- implies further flags
1990 -- When you un-set f, however, we don't un-set the things it implies
1991 -- (except for -fno-glasgow-exts, which is treated specially)
1993 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1995 --------------------------
1996 setDumpFlag :: DynFlag -> OptKind DynP
1997 setDumpFlag dump_flag
1998 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
2000 -- Certain dumpy-things are really interested in what's going
2001 -- on during recompilation checking, so in those cases we
2002 -- don't want to turn it off.
2003 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
2004 Opt_D_dump_hi_diffs]
2006 forceRecompile :: DynP ()
2007 -- Whenver we -ddump, force recompilation (by switching off the
2008 -- recompilation checker), else you don't see the dump! However,
2009 -- don't switch it off in --make mode, else *everything* gets
2010 -- recompiled which probably isn't what you want
2011 forceRecompile = do { dfs <- getCmdLineState
2012 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2014 force_recomp dfs = isOneShot (ghcMode dfs)
2016 setVerboseCore2Core :: DynP ()
2017 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
2019 upd (\s -> s { shouldDumpSimplPhase = const True })
2021 setDumpSimplPhases :: String -> DynP ()
2022 setDumpSimplPhases s = do forceRecompile
2023 upd (\s -> s { shouldDumpSimplPhase = spec })
2025 spec :: SimplifierMode -> Bool
2027 . map (join (&&) . map match . split ':')
2033 join :: (Bool -> Bool -> Bool)
2034 -> [SimplifierMode -> Bool]
2035 -> SimplifierMode -> Bool
2036 join _ [] = const True
2037 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2039 match :: String -> SimplifierMode -> Bool
2040 match "" = const True
2041 match s = case reads s of
2042 [(n,"")] -> phase_num n
2045 phase_num :: Int -> SimplifierMode -> Bool
2046 phase_num n (SimplPhase k _) = n == k
2047 phase_num _ _ = False
2049 phase_name :: String -> SimplifierMode -> Bool
2050 phase_name s SimplGently = s == "gentle"
2051 phase_name s (SimplPhase _ ss) = s `elem` ss
2053 setVerbosity :: Maybe Int -> DynP ()
2054 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2056 addCmdlineHCInclude :: String -> DynP ()
2057 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2059 extraPkgConf_ :: FilePath -> DynP ()
2060 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2062 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2064 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2066 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2068 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2070 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2072 setPackageName :: String -> DynFlags -> DynFlags
2073 setPackageName p s = s{ thisPackage = stringToPackageId p }
2075 -- If we're linking a binary, then only targets that produce object
2076 -- code are allowed (requests for other target types are ignored).
2077 setTarget :: HscTarget -> DynP ()
2078 setTarget l = upd set
2081 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2084 -- Changes the target only if we're compiling object code. This is
2085 -- used by -fasm and -fvia-C, which switch from one to the other, but
2086 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2087 -- can be safely used in an OPTIONS_GHC pragma.
2088 setObjTarget :: HscTarget -> DynP ()
2089 setObjTarget l = upd set
2092 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2095 setOptLevel :: Int -> DynFlags -> DynFlags
2096 setOptLevel n dflags
2097 | hscTarget dflags == HscInterpreted && n > 0
2099 -- not in IO any more, oh well:
2100 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2102 = updOptLevel n dflags
2105 -- -Odph is equivalent to
2107 -- -O2 optimise as much as possible
2108 -- -fno-method-sharing sharing specialisation defeats fusion
2110 -- -fdicts-cheap always inline dictionaries
2111 -- -fmax-simplifier-iterations20 this is necessary sometimes
2112 -- -fsimplifier-phases=3 we use an additional simplifier phase
2114 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2115 -- -fno-spec-constr-count SpecConstr as much as possible
2116 -- -finline-enough-args hack to prevent excessive inlining
2118 setDPHOpt :: DynFlags -> DynFlags
2119 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2121 , specConstrThreshold = Nothing
2122 , specConstrCount = Nothing
2124 `dopt_set` Opt_DictsCheap
2125 `dopt_unset` Opt_MethodSharing
2126 `dopt_set` Opt_InlineIfEnoughArgs
2128 data DPHBackend = DPHPar
2131 deriving(Eq, Ord, Enum, Show)
2133 setDPHBackend :: DPHBackend -> DynP ()
2134 setDPHBackend backend
2136 upd $ \dflags -> dflags { dphBackend = backend }
2137 mapM_ exposePackage (dph_packages backend)
2139 dph_packages DPHThis = []
2140 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2141 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2143 dphPackage :: DynFlags -> PackageId
2144 dphPackage dflags = case dphBackend dflags of
2145 DPHPar -> dphParPackageId
2146 DPHSeq -> dphSeqPackageId
2147 DPHThis -> thisPackage dflags
2149 setMainIs :: String -> DynP ()
2151 | not (null main_fn) && isLower (head main_fn)
2152 -- The arg looked like "Foo.Bar.baz"
2153 = upd $ \d -> d{ mainFunIs = Just main_fn,
2154 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2156 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2157 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2159 | otherwise -- The arg looked like "baz"
2160 = upd $ \d -> d{ mainFunIs = Just arg }
2162 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2164 -----------------------------------------------------------------------------
2165 -- Paths & Libraries
2167 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2169 -- -i on its own deletes the import paths
2170 addImportPath "" = upd (\s -> s{importPaths = []})
2171 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2175 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2178 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2180 addFrameworkPath p =
2181 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2183 #ifndef mingw32_TARGET_OS
2184 split_marker :: Char
2185 split_marker = ':' -- not configurable (ToDo)
2188 splitPathList :: String -> [String]
2189 splitPathList s = filter notNull (splitUp s)
2190 -- empty paths are ignored: there might be a trailing
2191 -- ':' in the initial list, for example. Empty paths can
2192 -- cause confusion when they are translated into -I options
2193 -- for passing to gcc.
2195 #ifndef mingw32_TARGET_OS
2196 splitUp xs = split split_marker xs
2198 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2200 -- That is, if "foo:bar:baz" is used, this interpreted as
2201 -- consisting of three entries, 'foo', 'bar', 'baz'.
2202 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2203 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2205 -- Notice that no attempt is made to fully replace the 'standard'
2206 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2207 -- that this will cause too much breakage for users & ':' will
2208 -- work fine even with DOS paths, if you're not insisting on being silly.
2211 splitUp (x:':':div:xs) | div `elem` dir_markers
2212 = ((x:':':div:p): splitUp rs)
2214 (p,rs) = findNextPath xs
2215 -- we used to check for existence of the path here, but that
2216 -- required the IO monad to be threaded through the command-line
2217 -- parser which is quite inconvenient. The
2218 splitUp xs = cons p (splitUp rs)
2220 (p,rs) = findNextPath xs
2225 -- will be called either when we've consumed nought or the
2226 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2227 -- finding the next split marker.
2229 case break (`elem` split_markers) xs of
2230 (p, _:ds) -> (p, ds)
2233 split_markers :: [Char]
2234 split_markers = [':', ';']
2236 dir_markers :: [Char]
2237 dir_markers = ['/', '\\']
2240 -- -----------------------------------------------------------------------------
2241 -- tmpDir, where we store temporary files.
2243 setTmpDir :: FilePath -> DynFlags -> DynFlags
2244 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2245 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2246 -- seem necessary now --SDM 7/2/2008
2248 -----------------------------------------------------------------------------
2251 setOptHpcDir :: String -> DynP ()
2252 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2254 -----------------------------------------------------------------------------
2255 -- Via-C compilation stuff
2257 -- There are some options that we need to pass to gcc when compiling
2258 -- Haskell code via C, but are only supported by recent versions of
2259 -- gcc. The configure script decides which of these options we need,
2260 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2261 -- read before each via-C compilation. The advantage of having these
2262 -- in a separate file is that the file can be created at install-time
2263 -- depending on the available gcc version, and even re-generated later
2264 -- if gcc is upgraded.
2266 -- The options below are not dependent on the version of gcc, only the
2269 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2270 [String]) -- for registerised HC compilations
2271 machdepCCOpts _dflags
2272 #if alpha_TARGET_ARCH
2274 #ifdef HAVE_THREADED_RTS_SUPPORT
2278 -- For now, to suppress the gcc warning "call-clobbered
2279 -- register used for global register variable", we simply
2280 -- disable all warnings altogether using the -w flag. Oh well.
2282 #elif hppa_TARGET_ARCH
2283 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2284 -- (very nice, but too bad the HP /usr/include files don't agree.)
2285 = ( ["-D_HPUX_SOURCE"], [] )
2287 #elif m68k_TARGET_ARCH
2288 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2289 -- popping of args to routines to be explicit; if we let things
2290 -- be deferred 'til after an STGJUMP, imminent death is certain!
2292 -- -fomit-frame-pointer : *don't*
2293 -- It's better to have a6 completely tied up being a frame pointer
2294 -- rather than let GCC pick random things to do with it.
2295 -- (If we want to steal a6, then we would try to do things
2296 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2297 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2299 #elif i386_TARGET_ARCH
2300 -- -fno-defer-pop : basically the same game as for m68k
2302 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2303 -- the fp (%ebp) for our register maps.
2304 = let n_regs = stolen_x86_regs _dflags
2307 #if darwin_TARGET_OS
2308 -- By default, gcc on OS X will generate SSE
2309 -- instructions, which need things 16-byte aligned,
2310 -- but we don't 16-byte align things. Thus drop
2311 -- back to generic i686 compatibility. Trac #2983.
2313 -- Since Snow Leopard (10.6), gcc defaults to x86_64.
2314 ["-march=i686", "-m32"],
2316 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2320 "-fomit-frame-pointer",
2321 -- we want -fno-builtin, because when gcc inlines
2322 -- built-in functions like memcpy() it tends to
2323 -- run out of registers, requiring -monly-n-regs
2325 "-DSTOLEN_X86_REGS="++show n_regs ]
2328 #elif ia64_TARGET_ARCH
2329 = ( [], ["-fomit-frame-pointer", "-G0"] )
2331 #elif x86_64_TARGET_ARCH
2333 #if darwin_TARGET_OS
2338 ["-fomit-frame-pointer",
2339 "-fno-asynchronous-unwind-tables",
2340 -- the unwind tables are unnecessary for HC code,
2341 -- and get in the way of -split-objs. Another option
2342 -- would be to throw them away in the mangler, but this
2345 -- calling builtins like strlen() using the FFI can
2346 -- cause gcc to run out of regs, so use the external
2350 #elif sparc_TARGET_ARCH
2352 -- For now, to suppress the gcc warning "call-clobbered
2353 -- register used for global register variable", we simply
2354 -- disable all warnings altogether using the -w flag. Oh well.
2356 #elif powerpc_apple_darwin_TARGET
2358 -- Disable Apple's precompiling preprocessor. It's a great thing
2359 -- for "normal" programs, but it doesn't support register variable
2361 = ( [], ["-no-cpp-precomp"] )
2366 picCCOpts :: DynFlags -> [String]
2368 #if darwin_TARGET_OS
2369 -- Apple prefers to do things the other way round.
2370 -- PIC is on by default.
2371 -- -mdynamic-no-pic:
2372 -- Turn off PIC code generation.
2374 -- Don't generate "common" symbols - these are unwanted
2375 -- in dynamic libraries.
2378 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2380 = ["-mdynamic-no-pic"]
2381 #elif mingw32_TARGET_OS
2382 -- no -fPIC for Windows
2384 = ["-U __PIC__","-D__PIC__"]
2388 | opt_PIC || not opt_Static
2389 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2394 -- -----------------------------------------------------------------------------
2398 can_split = cSplitObjs == "YES"
2400 -- -----------------------------------------------------------------------------
2403 data Printable = String String
2404 | FromDynFlags (DynFlags -> String)
2406 compilerInfo :: [(String, Printable)]
2407 compilerInfo = [("Project name", String cProjectName),
2408 ("Project version", String cProjectVersion),
2409 ("Booter version", String cBooterVersion),
2410 ("Stage", String cStage),
2411 ("Have interpreter", String cGhcWithInterpreter),
2412 ("Object splitting", String cSplitObjs),
2413 ("Have native code generator", String cGhcWithNativeCodeGen),
2414 ("Support SMP", String cGhcWithSMP),
2415 ("Unregisterised", String cGhcUnregisterised),
2416 ("Tables next to code", String cGhcEnableTablesNextToCode),
2417 ("Win32 DLLs", String cEnableWin32DLLs),
2418 ("RTS ways", String cGhcRTSWays),
2419 ("Leading underscore", String cLeadingUnderscore),
2420 ("Debug on", String (show debugIsOn)),
2421 ("LibDir", FromDynFlags topDir)