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
260 | Opt_PrintExplicitForalls
265 | Opt_StaticArgumentTransformation
269 | Opt_IgnoreInterfacePragmas
270 | Opt_OmitInterfacePragmas
271 | Opt_DoLambdaEtaExpansion
275 | Opt_UnboxStrictFields
278 | Opt_InlineIfEnoughArgs
279 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
281 | Opt_RegsGraph -- do graph coloring register allocation
282 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
285 | Opt_AutoSccsOnAllToplevs
286 | Opt_AutoSccsOnExportedToplevs
287 | Opt_AutoSccsOnIndividualCafs
295 | Opt_ExcessPrecision
296 | Opt_EagerBlackHoling
297 | Opt_ReadUserPackageConf
301 | Opt_HideAllPackages
302 | Opt_PrintBindResult
306 | Opt_BreakOnException
308 | Opt_PrintEvldWithShow
309 | Opt_PrintBindContents
312 | Opt_EmitExternalCore
314 | Opt_BuildingCabalPackage
319 | Opt_ConvertToZipCfgAndBack
320 | Opt_AutoLinkPackages
321 | Opt_ImplicitImportQualified
330 | Opt_KeepRawTokenStream
334 -- | Contains not only a collection of 'DynFlag's but also a plethora of
335 -- information relating to the compilation of a single file or GHC session
336 data DynFlags = DynFlags {
339 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
340 stgToDo :: Maybe [StgToDo], -- similarly
341 hscTarget :: HscTarget,
342 hscOutName :: String, -- ^ Name of the output file
343 extCoreName :: String, -- ^ Name of the .hcr output file
344 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
345 optLevel :: Int, -- ^ Optimisation level
346 simplPhases :: Int, -- ^ Number of simplifier phases
347 maxSimplIterations :: Int, -- ^ Max simplifier iterations
348 shouldDumpSimplPhase :: SimplifierMode -> Bool,
349 ruleCheck :: Maybe String,
351 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
352 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
353 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
355 #ifndef OMIT_NATIVE_CODEGEN
356 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
358 stolen_x86_regs :: Int,
359 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
360 importPaths :: [FilePath],
362 mainFunIs :: Maybe String,
363 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
365 dphBackend :: DPHBackend,
367 thisPackage :: PackageId, -- ^ name of package currently being compiled
370 ways :: [Way], -- ^ Way flags from the command line
371 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
372 rtsBuildTag :: String, -- ^ The RTS \"way\"
374 -- For object splitting
375 splitInfo :: Maybe (String,Int),
378 objectDir :: Maybe String,
379 hiDir :: Maybe String,
380 stubDir :: Maybe String,
386 outputFile :: Maybe String,
387 outputHi :: Maybe String,
388 dynLibLoader :: DynLibLoader,
390 -- | This is set by 'DriverPipeline.runPipeline' based on where
391 -- its output is going.
392 dumpPrefix :: Maybe FilePath,
394 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
395 -- Set by @-ddump-file-prefix@
396 dumpPrefixForce :: Maybe FilePath,
398 includePaths :: [String],
399 libraryPaths :: [String],
400 frameworkPaths :: [String], -- used on darwin only
401 cmdlineFrameworks :: [String], -- ditto
402 tmpDir :: String, -- no trailing '/'
404 ghcUsagePath :: FilePath, -- Filled in by SysTools
405 ghciUsagePath :: FilePath, -- ditto
407 hpcDir :: String, -- ^ Path to store the .mix files
409 -- options for particular phases
417 opt_windres :: [String],
419 -- commands for particular phases
421 pgm_P :: (String,[Option]),
423 pgm_c :: (String,[Option]),
424 pgm_m :: (String,[Option]),
425 pgm_s :: (String,[Option]),
426 pgm_a :: (String,[Option]),
427 pgm_l :: (String,[Option]),
428 pgm_dll :: (String,[Option]),
430 pgm_sysman :: String,
431 pgm_windres :: String,
434 depMakefile :: FilePath,
435 depIncludePkgDeps :: Bool,
436 depExcludeMods :: [ModuleName],
437 depSuffixes :: [String],
440 extraPkgConfs :: [FilePath],
441 topDir :: FilePath, -- filled in by SysTools
442 systemPackageConfig :: FilePath, -- ditto
443 -- ^ The @-package-conf@ flags given on the command line, in the order
446 packageFlags :: [PackageFlag],
447 -- ^ The @-package@ and @-hide-package@ flags from the command-line
450 -- NB. do not modify this field, it is calculated by
451 -- Packages.initPackages and Packages.updatePackages.
452 pkgDatabase :: Maybe [PackageConfig],
453 pkgState :: PackageState,
456 -- These have to be IORefs, because the defaultCleanupHandler needs to
457 -- know what to clean when an exception happens
458 filesToClean :: IORef [FilePath],
459 dirsToClean :: IORef (FiniteMap FilePath FilePath),
464 -- | Message output action: use "ErrUtils" instead of this if you can
465 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
467 haddockOptions :: Maybe String
470 wayNames :: DynFlags -> [WayName]
471 wayNames = map wayName . ways
473 -- | The target code type of the compilation (if any).
475 -- Whenever you change the target, also make sure to set 'ghcLink' to
476 -- something sensible.
478 -- 'HscNothing' can be used to avoid generating any output, however, note
481 -- * This will not run the desugaring step, thus no warnings generated in
482 -- this step will be output. In particular, this includes warnings related
483 -- to pattern matching. You can run the desugarer manually using
484 -- 'GHC.desugarModule'.
486 -- * If a program uses Template Haskell the typechecker may try to run code
487 -- from an imported module. This will fail if no code has been generated
488 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
489 -- whether this might be the case and choose to either switch to a
490 -- different target or avoid typechecking such modules. (The latter may
491 -- preferable for security reasons.)
494 = HscC -- ^ Generate C code.
495 | HscAsm -- ^ Generate assembly using the native code generator.
496 | HscJava -- ^ Generate Java bytecode.
497 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
498 | HscNothing -- ^ Don't generate any code. See notes above.
501 -- | Will this target result in an object file on the disk?
502 isObjectTarget :: HscTarget -> Bool
503 isObjectTarget HscC = True
504 isObjectTarget HscAsm = True
505 isObjectTarget _ = False
507 -- | The 'GhcMode' tells us whether we're doing multi-module
508 -- compilation (controlled via the "GHC" API) or one-shot
509 -- (single-module) compilation. This makes a difference primarily to
510 -- the "Finder": in one-shot mode we look for interface files for
511 -- imported modules, but in multi-module mode we look for source files
512 -- in order to check whether they need to be recompiled.
514 = CompManager -- ^ @\-\-make@, GHCi, etc.
515 | OneShot -- ^ @ghc -c Foo.hs@
516 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
519 instance Outputable GhcMode where
520 ppr CompManager = ptext (sLit "CompManager")
521 ppr OneShot = ptext (sLit "OneShot")
522 ppr MkDepend = ptext (sLit "MkDepend")
524 isOneShot :: GhcMode -> Bool
525 isOneShot OneShot = True
526 isOneShot _other = False
528 -- | What to do in the link step, if there is one.
530 = NoLink -- ^ Don't link at all
531 | LinkBinary -- ^ Link object code into a binary
532 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
533 -- bytecode and object code).
534 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
537 isNoLink :: GhcLink -> Bool
538 isNoLink NoLink = True
541 -- Is it worth evaluating this Bool and caching it in the DynFlags value
542 -- during initDynFlags?
543 doingTickyProfiling :: DynFlags -> Bool
544 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
547 = ExposePackage String
548 | ExposePackageId String
550 | IgnorePackage String
553 defaultHscTarget :: HscTarget
554 defaultHscTarget = defaultObjectTarget
556 -- | The 'HscTarget' value corresponding to the default way to create
557 -- object files on the current platform.
558 defaultObjectTarget :: HscTarget
560 | cGhcWithNativeCodeGen == "YES" = HscAsm
565 | Wrapped (Maybe String)
569 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
570 initDynFlags :: DynFlags -> IO DynFlags
571 initDynFlags dflags = do
572 -- someday these will be dynamic flags
573 ways <- readIORef v_Ways
574 refFilesToClean <- newIORef []
575 refDirsToClean <- newIORef emptyFM
578 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
579 rtsBuildTag = mkBuildTag ways,
580 filesToClean = refFilesToClean,
581 dirsToClean = refDirsToClean
584 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
585 -- and must be fully initialized by 'GHC.newSession' first.
586 defaultDynFlags :: DynFlags
589 ghcMode = CompManager,
590 ghcLink = LinkBinary,
593 hscTarget = defaultHscTarget,
599 maxSimplIterations = 4,
600 shouldDumpSimplPhase = const False,
602 specConstrThreshold = Just 200,
603 specConstrCount = Just 3,
604 liberateCaseThreshold = Just 200,
605 #ifndef OMIT_NATIVE_CODEGEN
606 targetPlatform = defaultTargetPlatform,
609 cmdlineHcIncludes = [],
613 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
617 thisPackage = mainPackageId,
623 objectSuf = phaseInputExt StopLn,
624 hcSuf = phaseInputExt HCc,
627 outputFile = Nothing,
629 dynLibLoader = SystemDependent,
630 dumpPrefix = Nothing,
631 dumpPrefixForce = Nothing,
635 cmdlineFrameworks = [],
636 tmpDir = cDEFAULT_TMPDIR,
642 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
653 pkgDatabase = Nothing,
654 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
655 ways = panic "defaultDynFlags: No ways",
656 buildTag = panic "defaultDynFlags: No buildTag",
657 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
659 -- initSysTools fills all these in
660 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
661 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
662 topDir = panic "defaultDynFlags: No topDir",
663 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
664 pgm_L = panic "defaultDynFlags: No pgm_L",
665 pgm_P = panic "defaultDynFlags: No pgm_P",
666 pgm_F = panic "defaultDynFlags: No pgm_F",
667 pgm_c = panic "defaultDynFlags: No pgm_c",
668 pgm_m = panic "defaultDynFlags: No pgm_m",
669 pgm_s = panic "defaultDynFlags: No pgm_s",
670 pgm_a = panic "defaultDynFlags: No pgm_a",
671 pgm_l = panic "defaultDynFlags: No pgm_l",
672 pgm_dll = panic "defaultDynFlags: No pgm_dll",
673 pgm_T = panic "defaultDynFlags: No pgm_T",
674 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
675 pgm_windres = panic "defaultDynFlags: No pgm_windres",
676 -- end of initSysTools values
678 depMakefile = "Makefile",
679 depIncludePkgDeps = False,
682 -- end of ghc -M values
683 filesToClean = panic "defaultDynFlags: No filesToClean",
684 dirsToClean = panic "defaultDynFlags: No dirsToClean",
685 haddockOptions = Nothing,
687 Opt_AutoLinkPackages,
688 Opt_ReadUserPackageConf,
690 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
691 -- behaviour the default, to see if anyone notices
695 Opt_MonomorphismRestriction,
706 Opt_PrintBindContents
708 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
709 -- The default -O0 options
712 log_action = \severity srcSpan style msg ->
714 SevInfo -> printErrs (msg style)
715 SevFatal -> printErrs (msg style)
718 printErrs ((mkLocMessage srcSpan msg) style)
719 -- careful (#2302): printErrs prints in UTF-8, whereas
720 -- converting to string first and using hPutStr would
721 -- just emit the low 8 bits of each unicode char.
728 0 | print errors & warnings only
729 1 | minimal verbosity: print "compiling M ... done." for each module.
730 2 | equivalent to -dshow-passes
731 3 | equivalent to existing "ghc -v"
732 4 | "ghc -v -ddump-most"
733 5 | "ghc -v -ddump-all"
736 -- | Test whether a 'DynFlag' is set
737 dopt :: DynFlag -> DynFlags -> Bool
738 dopt f dflags = f `elem` (flags dflags)
741 dopt_set :: DynFlags -> DynFlag -> DynFlags
742 dopt_set dfs f = dfs{ flags = f : flags dfs }
744 -- | Unset a 'DynFlag'
745 dopt_unset :: DynFlags -> DynFlag -> DynFlags
746 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
748 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
749 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
750 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
751 -> [a] -- ^ Correctly ordered extracted options
752 getOpts dflags opts = reverse (opts dflags)
753 -- We add to the options from the front, so we need to reverse the list
755 -- | Gets the verbosity flag for the current verbosity level. This is fed to
756 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
757 getVerbFlag :: DynFlags -> String
759 | verbosity dflags >= 3 = "-v"
762 setObjectDir, setHiDir, setStubDir, setOutputDir,
763 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
764 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
765 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
766 addCmdlineFramework, addHaddockOpts
767 :: String -> DynFlags -> DynFlags
768 setOutputFile, setOutputHi, setDumpPrefixForce
769 :: Maybe String -> DynFlags -> DynFlags
771 setObjectDir f d = d{ objectDir = Just f}
772 setHiDir f d = d{ hiDir = Just f}
773 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
774 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
775 -- \#included from the .hc file when compiling with -fvia-C.
776 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
778 setObjectSuf f d = d{ objectSuf = f}
779 setHiSuf f d = d{ hiSuf = f}
780 setHcSuf f d = d{ hcSuf = f}
782 setOutputFile f d = d{ outputFile = f}
783 setOutputHi f d = d{ outputHi = f}
785 parseDynLibLoaderMode f d =
787 ("deploy", "") -> d{ dynLibLoader = Deployable }
788 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
789 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
790 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
791 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
792 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
794 setDumpPrefixForce f d = d { dumpPrefixForce = f}
796 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
797 -- Config.hs should really use Option.
798 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
800 setPgmL f d = d{ pgm_L = f}
801 setPgmF f d = d{ pgm_F = f}
802 setPgmc f d = d{ pgm_c = (f,[])}
803 setPgmm f d = d{ pgm_m = (f,[])}
804 setPgms f d = d{ pgm_s = (f,[])}
805 setPgma f d = d{ pgm_a = (f,[])}
806 setPgml f d = d{ pgm_l = (f,[])}
807 setPgmdll f d = d{ pgm_dll = (f,[])}
808 setPgmwindres f d = d{ pgm_windres = f}
810 addOptL f d = d{ opt_L = f : opt_L d}
811 addOptP f d = d{ opt_P = f : opt_P d}
812 addOptF f d = d{ opt_F = f : opt_F d}
813 addOptc f d = d{ opt_c = f : opt_c d}
814 addOptm f d = d{ opt_m = f : opt_m d}
815 addOpta f d = d{ opt_a = f : opt_a d}
816 addOptl f d = d{ opt_l = f : opt_l d}
817 addOptwindres f d = d{ opt_windres = f : opt_windres d}
819 setDepMakefile :: FilePath -> DynFlags -> DynFlags
820 setDepMakefile f d = d { depMakefile = deOptDep f }
822 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
823 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
825 addDepExcludeMod :: String -> DynFlags -> DynFlags
827 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
829 addDepSuffix :: FilePath -> DynFlags -> DynFlags
830 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
833 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
834 -- we need to strip the "-optdep" off of the arg
835 deOptDep :: String -> String
836 deOptDep x = case stripPrefix "-optdep" x of
840 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
842 addHaddockOpts f d = d{ haddockOptions = Just f}
844 -- -----------------------------------------------------------------------------
845 -- Command-line options
847 -- | When invoking external tools as part of the compilation pipeline, we
848 -- pass these a sequence of options on the command-line. Rather than
849 -- just using a list of Strings, we use a type that allows us to distinguish
850 -- between filepaths and 'other stuff'. The reason for this is that
851 -- this type gives us a handle on transforming filenames, and filenames only,
852 -- to whatever format they're expected to be on a particular platform.
854 = FileOption -- an entry that _contains_ filename(s) / filepaths.
855 String -- a non-filepath prefix that shouldn't be
856 -- transformed (e.g., "/out=")
857 String -- the filepath/filename portion
860 showOpt :: Option -> String
861 showOpt (FileOption pre f) = pre ++ f
862 showOpt (Option s) = s
864 -----------------------------------------------------------------------------
865 -- Setting the optimisation level
867 updOptLevel :: Int -> DynFlags -> DynFlags
868 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
870 = dfs2{ optLevel = final_n }
872 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
873 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
874 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
876 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
877 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
879 optLevelFlags :: [([Int], DynFlag)]
881 = [ ([0], Opt_IgnoreInterfacePragmas)
882 , ([0], Opt_OmitInterfacePragmas)
884 , ([1,2], Opt_IgnoreAsserts)
885 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
887 , ([1,2], Opt_DoEtaReduction)
888 , ([1,2], Opt_CaseMerge)
889 , ([1,2], Opt_Strictness)
891 , ([1,2], Opt_FullLaziness)
893 , ([2], Opt_LiberateCase)
894 , ([2], Opt_SpecConstr)
896 -- , ([2], Opt_StaticArgumentTransformation)
897 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
898 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
899 -- several improvements to the heuristics, and I'm concerned that without
900 -- those changes SAT will interfere with some attempts to write "high
901 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
902 -- this year. In particular, the version in HEAD lacks the tail call
903 -- criterion, so many things that look like reasonable loops will be
904 -- turned into functions with extra (unneccesary) thunk creation.
906 , ([0,1,2], Opt_DoLambdaEtaExpansion)
907 -- This one is important for a tiresome reason:
908 -- we want to make sure that the bindings for data
909 -- constructors are eta-expanded. This is probably
910 -- a good thing anyway, but it seems fragile.
913 -- -----------------------------------------------------------------------------
914 -- Standard sets of warning options
916 standardWarnings :: [DynFlag]
918 = [ Opt_WarnWarningsDeprecations,
919 Opt_WarnDeprecatedFlags,
920 Opt_WarnUnrecognisedPragmas,
921 Opt_WarnOverlappingPatterns,
922 Opt_WarnMissingFields,
923 Opt_WarnMissingMethods,
924 Opt_WarnDuplicateExports,
925 Opt_WarnLazyUnliftedBindings,
926 Opt_WarnDodgyForeignImports,
930 minusWOpts :: [DynFlag]
932 = standardWarnings ++
933 [ Opt_WarnUnusedBinds,
934 Opt_WarnUnusedMatches,
935 Opt_WarnUnusedImports,
936 Opt_WarnIncompletePatterns,
937 Opt_WarnDodgyExports,
941 minusWallOpts :: [DynFlag]
944 [ Opt_WarnTypeDefaults,
945 Opt_WarnNameShadowing,
952 -- minuswRemovesOpts should be every warning option
953 minuswRemovesOpts :: [DynFlag]
956 [Opt_WarnImplicitPrelude,
957 Opt_WarnIncompletePatternsRecUpd,
958 Opt_WarnSimplePatterns,
959 Opt_WarnMonomorphism,
960 Opt_WarnUnrecognisedPragmas,
964 -- -----------------------------------------------------------------------------
965 -- CoreToDo: abstraction of core-to-core passes to run.
967 data CoreToDo -- These are diff core-to-core passes,
968 -- which may be invoked in any order,
969 -- as many times as you like.
971 = CoreDoSimplify -- The core-to-core simplifier.
974 -- Each run of the simplifier can take a different
975 -- set of simplifier-specific flags.
977 | CoreDoFloatOutwards FloatOutSwitches
982 | CoreDoWorkerWrapper
985 | CoreDoOldStrictness
988 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
989 -- matching this string
990 | CoreDoVectorisation PackageId
991 | CoreDoNothing -- Useful when building up
992 | CoreDoPasses [CoreToDo] -- lists of these things
995 data SimplifierMode -- See comments in SimplMonad
997 | SimplPhase Int [String]
999 instance Outputable SimplifierMode where
1000 ppr SimplGently = ptext (sLit "gentle")
1001 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1004 data SimplifierSwitch
1005 = MaxSimplifierIterations Int
1009 data FloatOutSwitches = FloatOutSwitches {
1010 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1011 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1012 -- even if they do not escape a lambda
1015 instance Outputable FloatOutSwitches where
1016 ppr = pprFloatOutSwitches
1018 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1019 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1020 <+> pp_not (floatOutConstants sw) <+> text "constants"
1023 pp_not False = text "not"
1025 -- | Switches that specify the minimum amount of floating out
1026 -- gentleFloatOutSwitches :: FloatOutSwitches
1027 -- gentleFloatOutSwitches = FloatOutSwitches False False
1029 -- | Switches that do not specify floating out of lambdas, just of constants
1030 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1031 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1034 -- The core-to-core pass ordering is derived from the DynFlags:
1035 runWhen :: Bool -> CoreToDo -> CoreToDo
1036 runWhen True do_this = do_this
1037 runWhen False _ = CoreDoNothing
1039 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1040 runMaybe (Just x) f = f x
1041 runMaybe Nothing _ = CoreDoNothing
1043 getCoreToDo :: DynFlags -> [CoreToDo]
1045 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1046 | otherwise = core_todo
1048 opt_level = optLevel dflags
1049 phases = simplPhases dflags
1050 max_iter = maxSimplIterations dflags
1051 strictness = dopt Opt_Strictness dflags
1052 full_laziness = dopt Opt_FullLaziness dflags
1053 cse = dopt Opt_CSE dflags
1054 spec_constr = dopt Opt_SpecConstr dflags
1055 liberate_case = dopt Opt_LiberateCase dflags
1056 rule_check = ruleCheck dflags
1057 static_args = dopt Opt_StaticArgumentTransformation dflags
1059 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1061 simpl_phase phase names iter
1063 [ CoreDoSimplify (SimplPhase phase names) [
1064 MaxSimplifierIterations iter
1066 maybe_rule_check phase
1070 = runWhen (dopt Opt_Vectorise dflags)
1071 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1074 -- By default, we have 2 phases before phase 0.
1076 -- Want to run with inline phase 2 after the specialiser to give
1077 -- maximum chance for fusion to work before we inline build/augment
1078 -- in phase 1. This made a difference in 'ansi' where an
1079 -- overloaded function wasn't inlined till too late.
1081 -- Need phase 1 so that build/augment get
1082 -- inlined. I found that spectral/hartel/genfft lost some useful
1083 -- strictness in the function sumcode' if augment is not inlined
1084 -- before strictness analysis runs
1085 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1086 | phase <- [phases, phases-1 .. 1] ]
1089 -- initial simplify: mk specialiser happy: minimum effort please
1090 simpl_gently = CoreDoSimplify SimplGently [
1091 -- Simplify "gently"
1092 -- Don't inline anything till full laziness has bitten
1093 -- In particular, inlining wrappers inhibits floating
1094 -- e.g. ...(case f x of ...)...
1095 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1096 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1097 -- and now the redex (f x) isn't floatable any more
1098 -- Similarly, don't apply any rules until after full
1099 -- laziness. Notably, list fusion can prevent floating.
1101 NoCaseOfCase, -- Don't do case-of-case transformations.
1102 -- This makes full laziness work better
1103 MaxSimplifierIterations max_iter
1107 if opt_level == 0 then
1109 simpl_phase 0 ["final"] max_iter]
1110 else {- opt_level >= 1 -} [
1112 -- We want to do the static argument transform before full laziness as it
1113 -- may expose extra opportunities to float things outwards. However, to fix
1114 -- up the output of the transformation we need at do at least one simplify
1115 -- after this before anything else
1116 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1118 -- We run vectorisation here for now, but we might also try to run
1122 -- initial simplify: mk specialiser happy: minimum effort please
1125 -- Specialisation is best done before full laziness
1126 -- so that overloaded functions have all their dictionary lambdas manifest
1129 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1130 -- Was: gentleFloatOutSwitches
1131 -- I have no idea why, but not floating constants to top level is
1132 -- very bad in some cases.
1133 -- Notably: p_ident in spectral/rewrite
1134 -- Changing from "gentle" to "constantsOnly" improved
1135 -- rewrite's allocation by 19%, and made 0.0% difference
1136 -- to any other nofib benchmark
1142 -- Phase 0: allow all Ids to be inlined now
1143 -- This gets foldr inlined before strictness analysis
1145 -- At least 3 iterations because otherwise we land up with
1146 -- huge dead expressions because of an infelicity in the
1148 -- let k = BIG in foldr k z xs
1149 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1150 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1152 simpl_phase 0 ["main"] (max max_iter 3),
1155 #ifdef OLD_STRICTNESS
1156 CoreDoOldStrictness,
1158 runWhen strictness (CoreDoPasses [
1160 CoreDoWorkerWrapper,
1162 simpl_phase 0 ["post-worker-wrapper"] max_iter
1165 runWhen full_laziness
1166 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1167 -- nofib/spectral/hartel/wang doubles in speed if you
1168 -- do full laziness late in the day. It only happens
1169 -- after fusion and other stuff, so the early pass doesn't
1170 -- catch it. For the record, the redex is
1171 -- f_el22 (f_el21 r_midblock)
1174 runWhen cse CoreCSE,
1175 -- We want CSE to follow the final full-laziness pass, because it may
1176 -- succeed in commoning up things floated out by full laziness.
1177 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1183 -- Case-liberation for -O2. This should be after
1184 -- strictness analysis and the simplification which follows it.
1185 runWhen liberate_case (CoreDoPasses [
1187 simpl_phase 0 ["post-liberate-case"] max_iter
1188 ]), -- Run the simplifier after LiberateCase to vastly
1189 -- reduce the possiblility of shadowing
1190 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1192 runWhen spec_constr CoreDoSpecConstr,
1196 -- Final clean-up simplification:
1197 simpl_phase 0 ["final"] max_iter
1200 -- -----------------------------------------------------------------------------
1201 -- StgToDo: abstraction of stg-to-stg passes to run.
1204 = StgDoMassageForProfiling -- should be (next to) last
1205 -- There's also setStgVarInfo, but its absolute "lastness"
1206 -- is so critical that it is hardwired in (no flag).
1209 getStgToDo :: DynFlags -> [StgToDo]
1211 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1214 stg_stats = dopt Opt_StgStats dflags
1216 todo1 = if stg_stats then [D_stg_stats] else []
1218 todo2 | WayProf `elem` wayNames dflags
1219 = StgDoMassageForProfiling : todo1
1223 -- -----------------------------------------------------------------------------
1226 allFlags :: [String]
1227 allFlags = map ('-':) $
1228 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1229 map ("fno-"++) flags ++
1230 map ("f"++) flags ++
1231 map ("X"++) supportedLanguages ++
1232 map ("XNo"++) supportedLanguages
1233 where ok (PrefixPred _ _) = False
1235 flags = [ name | (name, _, _) <- fFlags ]
1237 dynamic_flags :: [Flag DynP]
1239 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1240 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1241 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1242 , Flag "#include" (HasArg (addCmdlineHCInclude))
1243 (Deprecated "No longer has any effect")
1244 , Flag "v" (OptIntSuffix setVerbosity) Supported
1246 ------- Specific phases --------------------------------------------
1247 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1248 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1249 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1250 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1251 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1252 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1253 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1254 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1255 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1256 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1258 , Flag "optL" (HasArg (upd . addOptL)) Supported
1259 , Flag "optP" (HasArg (upd . addOptP)) Supported
1260 , Flag "optF" (HasArg (upd . addOptF)) Supported
1261 , Flag "optc" (HasArg (upd . addOptc)) Supported
1262 , Flag "optm" (HasArg (upd . addOptm)) Supported
1263 , Flag "opta" (HasArg (upd . addOpta)) Supported
1264 , Flag "optl" (HasArg (upd . addOptl)) Supported
1265 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1268 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1271 -------- ghc -M -----------------------------------------------------
1272 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1273 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1274 (Deprecated "Use -dep-suffix instead")
1275 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1276 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1277 (Deprecated "Use -dep-makefile instead")
1278 , Flag "optdep-w" (NoArg (return ()))
1279 (Deprecated "-optdep-w doesn't do anything")
1280 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1281 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1282 (Deprecated "Use -include-pkg-deps instead")
1283 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1284 (Deprecated "Use -include-pkg-deps instead")
1285 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1286 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1287 (Deprecated "Use -exclude-module instead")
1288 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1289 (Deprecated "Use -exclude-module instead")
1291 -------- Linking ----------------------------------------------------
1292 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1294 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1295 (Deprecated "Use -c instead")
1296 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1298 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1301 ------- Libraries ---------------------------------------------------
1302 , Flag "L" (Prefix addLibraryPath ) Supported
1303 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1305 ------- Frameworks --------------------------------------------------
1306 -- -framework-path should really be -F ...
1307 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1308 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1310 ------- Output Redirection ------------------------------------------
1311 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1312 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1313 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1314 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1315 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1316 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1317 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1318 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1319 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1320 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1321 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1324 ------- Keeping temporary files -------------------------------------
1325 -- These can be singular (think ghc -c) or plural (think ghc --make)
1326 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1327 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1328 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1329 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1330 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1331 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1332 -- This only makes sense as plural
1333 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1335 ------- Miscellaneous ----------------------------------------------
1336 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1337 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1338 , Flag "main-is" (SepArg setMainIs ) Supported
1339 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1340 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1341 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1343 ------- recompilation checker --------------------------------------
1344 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1345 (Deprecated "Use -fno-force-recomp instead")
1346 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1347 (Deprecated "Use -fforce-recomp instead")
1349 ------ HsCpp opts ---------------------------------------------------
1350 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1351 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1353 ------- Include/Import Paths ----------------------------------------
1354 , Flag "I" (Prefix addIncludePath) Supported
1355 , Flag "i" (OptPrefix addImportPath ) Supported
1357 ------ Debugging ----------------------------------------------------
1358 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1360 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1362 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1364 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1366 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1368 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1370 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1372 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1374 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1376 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1378 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1380 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1382 , Flag "ddump-asm-regalloc-stages"
1383 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1385 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1387 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1389 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1391 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1393 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1395 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1397 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1399 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1401 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1403 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1405 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1407 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1409 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1411 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1413 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1415 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1417 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1419 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1421 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1423 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1425 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1427 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1429 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1431 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1433 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1435 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1437 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1439 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1441 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1443 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1445 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1447 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1449 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1451 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1453 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1455 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1457 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1459 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1461 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1463 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1465 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1467 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1469 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1471 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1474 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1476 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1478 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1480 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1482 , Flag "dshow-passes"
1483 (NoArg (do forceRecompile
1484 setVerbosity (Just 2)))
1486 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1489 ------ Machine dependant (-m<blah>) stuff ---------------------------
1491 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1493 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1495 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1498 ------ Warning opts -------------------------------------------------
1499 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1501 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1503 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1505 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1507 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1508 (Deprecated "Use -w instead")
1509 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1512 ------ Optimisation flags ------------------------------------------
1513 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1514 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1515 (Deprecated "Use -O0 instead")
1516 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1517 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1519 -- If the number is missing, use 1
1521 , Flag "fsimplifier-phases"
1522 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1524 , Flag "fmax-simplifier-iterations"
1525 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1528 , Flag "fspec-constr-threshold"
1529 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1531 , Flag "fno-spec-constr-threshold"
1532 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1534 , Flag "fspec-constr-count"
1535 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1537 , Flag "fno-spec-constr-count"
1538 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1540 , Flag "fliberate-case-threshold"
1541 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1543 , Flag "fno-liberate-case-threshold"
1544 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1547 , Flag "frule-check"
1548 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1550 , Flag "fcontext-stack"
1551 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1554 ------ Profiling ----------------------------------------------------
1556 -- XXX Should the -f* flags be deprecated?
1557 -- They don't seem to be documented
1558 , Flag "fauto-sccs-on-all-toplevs"
1559 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1562 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1564 , Flag "no-auto-all"
1565 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1567 , Flag "fauto-sccs-on-exported-toplevs"
1568 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1571 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1574 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1576 , Flag "fauto-sccs-on-individual-cafs"
1577 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1580 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1583 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1586 ------ DPH flags ----------------------------------------------------
1589 (NoArg (setDPHBackend DPHSeq))
1592 (NoArg (setDPHBackend DPHPar))
1595 (NoArg (setDPHBackend DPHThis))
1598 ------ Compiler flags -----------------------------------------------
1600 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1601 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1602 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1604 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1605 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1606 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1608 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1610 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1613 ++ map (mkFlag True "f" setDynFlag ) fFlags
1614 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1615 ++ map (mkFlag True "X" setDynFlag ) xFlags
1616 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1618 package_flags :: [Flag DynP]
1620 ------- Packages ----------------------------------------------------
1621 Flag "package-conf" (HasArg extraPkgConf_) Supported
1622 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1624 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1625 , Flag "package-id" (HasArg exposePackageId) Supported
1626 , Flag "package" (HasArg exposePackage) Supported
1627 , Flag "hide-package" (HasArg hidePackage) Supported
1628 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1630 , Flag "ignore-package" (HasArg ignorePackage)
1632 , Flag "syslib" (HasArg exposePackage)
1633 (Deprecated "Use -package instead")
1636 mkFlag :: Bool -- ^ True <=> it should be turned on
1637 -> String -- ^ The flag prefix
1638 -> (DynFlag -> DynP ())
1639 -> (String, DynFlag, Bool -> Deprecated)
1641 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1642 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1644 deprecatedForLanguage :: String -> Bool -> Deprecated
1645 deprecatedForLanguage lang turn_on
1646 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1648 flag | turn_on = lang
1649 | otherwise = "No"++lang
1651 useInstead :: String -> Bool -> Deprecated
1652 useInstead flag turn_on
1653 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1655 no = if turn_on then "" else "no-"
1657 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1658 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1660 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1661 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1662 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1663 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1664 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1665 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1666 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1667 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1668 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1669 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1670 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1671 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1672 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1673 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1674 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1675 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1676 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1677 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1678 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1679 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1680 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1681 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1682 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1683 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1684 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1685 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1686 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1687 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1688 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1689 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1690 ( "strictness", Opt_Strictness, const Supported ),
1691 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1692 ( "full-laziness", Opt_FullLaziness, const Supported ),
1693 ( "liberate-case", Opt_LiberateCase, const Supported ),
1694 ( "spec-constr", Opt_SpecConstr, const Supported ),
1695 ( "cse", Opt_CSE, const Supported ),
1696 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1697 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1698 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1699 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1700 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1701 ( "case-merge", Opt_CaseMerge, const Supported ),
1702 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1703 ( "method-sharing", Opt_MethodSharing, const Supported ),
1704 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1705 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1706 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1707 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1708 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1709 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1710 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1711 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1712 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1713 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1714 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1715 ( "break-on-error", Opt_BreakOnError, const Supported ),
1716 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1717 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1718 ( "run-cps", Opt_RunCPS, const Supported ),
1719 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1720 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1721 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1722 ( "vectorise", Opt_Vectorise, const Supported ),
1723 ( "regs-graph", Opt_RegsGraph, const Supported ),
1724 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1725 ( "th", Opt_TemplateHaskell,
1726 deprecatedForLanguage "TemplateHaskell" ),
1727 ( "fi", Opt_ForeignFunctionInterface,
1728 deprecatedForLanguage "ForeignFunctionInterface" ),
1729 ( "ffi", Opt_ForeignFunctionInterface,
1730 deprecatedForLanguage "ForeignFunctionInterface" ),
1731 ( "arrows", Opt_Arrows,
1732 deprecatedForLanguage "Arrows" ),
1733 ( "generics", Opt_Generics,
1734 deprecatedForLanguage "Generics" ),
1735 ( "implicit-prelude", Opt_ImplicitPrelude,
1736 deprecatedForLanguage "ImplicitPrelude" ),
1737 ( "bang-patterns", Opt_BangPatterns,
1738 deprecatedForLanguage "BangPatterns" ),
1739 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1740 deprecatedForLanguage "MonomorphismRestriction" ),
1741 ( "mono-pat-binds", Opt_MonoPatBinds,
1742 deprecatedForLanguage "MonoPatBinds" ),
1743 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1744 deprecatedForLanguage "ExtendedDefaultRules" ),
1745 ( "implicit-params", Opt_ImplicitParams,
1746 deprecatedForLanguage "ImplicitParams" ),
1747 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1748 deprecatedForLanguage "ScopedTypeVariables" ),
1750 deprecatedForLanguage "PArr" ),
1751 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1752 deprecatedForLanguage "OverlappingInstances" ),
1753 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1754 deprecatedForLanguage "UndecidableInstances" ),
1755 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1756 deprecatedForLanguage "IncoherentInstances" ),
1757 ( "gen-manifest", Opt_GenManifest, const Supported ),
1758 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1759 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1760 ( "shared-implib", Opt_SharedImplib, const Supported ),
1761 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1762 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1765 supportedLanguages :: [String]
1766 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1768 -- This may contain duplicates
1769 languageOptions :: [DynFlag]
1770 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1772 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1773 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1775 ( "CPP", Opt_Cpp, const Supported ),
1776 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1777 ( "TupleSections", Opt_TupleSections, const Supported ),
1778 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1779 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1780 ( "MagicHash", Opt_MagicHash, const Supported ),
1781 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1782 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1783 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1784 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1785 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1786 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1787 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1788 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1789 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1790 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1791 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1792 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1793 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1794 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1795 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1796 ( "Arrows", Opt_Arrows, const Supported ),
1797 ( "PArr", Opt_PArr, const Supported ),
1798 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1799 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1800 ( "Generics", Opt_Generics, const Supported ),
1802 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1803 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1804 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1805 ( "RecordPuns", Opt_RecordPuns,
1806 deprecatedForLanguage "NamedFieldPuns" ),
1807 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1808 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1809 ( "GADTs", Opt_GADTs, const Supported ),
1810 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1811 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1812 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1814 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1816 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1817 -- On by default (which is not strictly H98):
1818 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1819 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1820 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1821 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1822 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1823 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1825 ( "PatternSignatures", Opt_ScopedTypeVariables,
1826 deprecatedForLanguage "ScopedTypeVariables" ),
1828 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1829 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1830 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1831 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1832 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1833 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1834 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1835 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1836 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1837 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1838 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1839 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1840 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1841 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1842 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1843 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1844 ( "PackageImports", Opt_PackageImports, const Supported ),
1845 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1848 impliedFlags :: [(DynFlag, DynFlag)]
1850 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1851 -- be completely rigid for GADTs
1853 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1854 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1855 -- all over the place
1857 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1858 -- Note [Scoped tyvars] in TcBinds
1859 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1861 -- Record wild-cards implies field disambiguation
1862 -- Otherwise if you write (C {..}) you may well get
1863 -- stuff like " 'a' not in scope ", which is a bit silly
1864 -- if the compiler has just filled in field 'a' of constructor 'C'
1865 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1868 glasgowExtsFlags :: [DynFlag]
1869 glasgowExtsFlags = [
1870 Opt_PrintExplicitForalls
1871 , Opt_ForeignFunctionInterface
1872 , Opt_UnliftedFFITypes
1874 , Opt_ImplicitParams
1875 , Opt_ScopedTypeVariables
1877 , Opt_TypeSynonymInstances
1878 , Opt_StandaloneDeriving
1879 , Opt_DeriveDataTypeable
1881 , Opt_DeriveFoldable
1882 , Opt_DeriveTraversable
1883 , Opt_FlexibleContexts
1884 , Opt_FlexibleInstances
1885 , Opt_ConstrainedClassMethods
1886 , Opt_MultiParamTypeClasses
1887 , Opt_FunctionalDependencies
1889 , Opt_PolymorphicComponents
1890 , Opt_ExistentialQuantification
1892 , Opt_PostfixOperators
1894 , Opt_LiberalTypeSynonyms
1898 , Opt_ParallelListComp
1899 , Opt_EmptyDataDecls
1900 , Opt_KindSignatures
1901 , Opt_GeneralizedNewtypeDeriving
1902 , Opt_TypeFamilies ]
1904 -- -----------------------------------------------------------------------------
1905 -- Parsing the dynamic flags.
1907 -- | Parse dynamic flags from a list of command line arguments. Returns the
1908 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1909 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1910 -- flags or missing arguments).
1911 parseDynamicFlags :: Monad m =>
1912 DynFlags -> [Located String]
1913 -> m (DynFlags, [Located String], [Located String])
1914 -- ^ Updated 'DynFlags', left-over arguments, and
1915 -- list of warnings.
1916 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1918 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1919 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1920 parseDynamicNoPackageFlags :: 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 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1927 parseDynamicFlags_ :: Monad m =>
1928 DynFlags -> [Located String] -> Bool
1929 -> m (DynFlags, [Located String], [Located String])
1930 parseDynamicFlags_ dflags0 args pkg_flags = do
1931 -- XXX Legacy support code
1932 -- We used to accept things like
1933 -- optdep-f -optdepdepend
1934 -- optdep-f -optdep depend
1935 -- optdep -f -optdepdepend
1936 -- optdep -f -optdep depend
1937 -- but the spaces trip up proper argument handling. So get rid of them.
1938 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1939 f (x : xs) = x : f xs
1943 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1944 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1945 | otherwise = dynamic_flags
1947 let ((leftover, errs, warns), dflags1)
1948 = runCmdLine (processArgs flag_spec args') dflags0
1949 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1951 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1952 -- isn't up to the job. We know that if hscTarget == HscC, then the
1953 -- user has explicitly used -fvia-C, because -fasm is the default,
1954 -- unless there is no NCG on this platform. The latter case is
1955 -- checked when the -fPIC flag is parsed.
1957 let (pic_warns, dflags2) =
1958 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1959 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1960 dflags1{ hscTarget = HscAsm })
1963 return (dflags2, leftover, pic_warns ++ warns)
1965 type DynP = CmdLineP DynFlags
1967 upd :: (DynFlags -> DynFlags) -> DynP ()
1969 dfs <- getCmdLineState
1970 putCmdLineState $! (f dfs)
1972 --------------------------
1973 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1974 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1975 ; mapM_ setDynFlag deps }
1977 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1978 -- When you set f, set the ones it implies
1979 -- NB: use setDynFlag recursively, in case the implied flags
1980 -- implies further flags
1981 -- When you un-set f, however, we don't un-set the things it implies
1982 -- (except for -fno-glasgow-exts, which is treated specially)
1984 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1986 --------------------------
1987 setDumpFlag :: DynFlag -> OptKind DynP
1988 setDumpFlag dump_flag
1989 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1991 -- Certain dumpy-things are really interested in what's going
1992 -- on during recompilation checking, so in those cases we
1993 -- don't want to turn it off.
1994 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1995 Opt_D_dump_hi_diffs]
1997 forceRecompile :: DynP ()
1998 -- Whenver we -ddump, force recompilation (by switching off the
1999 -- recompilation checker), else you don't see the dump! However,
2000 -- don't switch it off in --make mode, else *everything* gets
2001 -- recompiled which probably isn't what you want
2002 forceRecompile = do { dfs <- getCmdLineState
2003 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2005 force_recomp dfs = isOneShot (ghcMode dfs)
2007 setVerboseCore2Core :: DynP ()
2008 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
2010 upd (\s -> s { shouldDumpSimplPhase = const True })
2012 setDumpSimplPhases :: String -> DynP ()
2013 setDumpSimplPhases s = do forceRecompile
2014 upd (\s -> s { shouldDumpSimplPhase = spec })
2016 spec :: SimplifierMode -> Bool
2018 . map (join (&&) . map match . split ':')
2024 join :: (Bool -> Bool -> Bool)
2025 -> [SimplifierMode -> Bool]
2026 -> SimplifierMode -> Bool
2027 join _ [] = const True
2028 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2030 match :: String -> SimplifierMode -> Bool
2031 match "" = const True
2032 match s = case reads s of
2033 [(n,"")] -> phase_num n
2036 phase_num :: Int -> SimplifierMode -> Bool
2037 phase_num n (SimplPhase k _) = n == k
2038 phase_num _ _ = False
2040 phase_name :: String -> SimplifierMode -> Bool
2041 phase_name s SimplGently = s == "gentle"
2042 phase_name s (SimplPhase _ ss) = s `elem` ss
2044 setVerbosity :: Maybe Int -> DynP ()
2045 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2047 addCmdlineHCInclude :: String -> DynP ()
2048 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2050 extraPkgConf_ :: FilePath -> DynP ()
2051 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2053 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2055 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2057 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2059 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2061 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2063 setPackageName :: String -> DynFlags -> DynFlags
2064 setPackageName p s = s{ thisPackage = stringToPackageId p }
2066 -- If we're linking a binary, then only targets that produce object
2067 -- code are allowed (requests for other target types are ignored).
2068 setTarget :: HscTarget -> DynP ()
2069 setTarget l = upd set
2072 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2075 -- Changes the target only if we're compiling object code. This is
2076 -- used by -fasm and -fvia-C, which switch from one to the other, but
2077 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2078 -- can be safely used in an OPTIONS_GHC pragma.
2079 setObjTarget :: HscTarget -> DynP ()
2080 setObjTarget l = upd set
2083 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2086 setOptLevel :: Int -> DynFlags -> DynFlags
2087 setOptLevel n dflags
2088 | hscTarget dflags == HscInterpreted && n > 0
2090 -- not in IO any more, oh well:
2091 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2093 = updOptLevel n dflags
2096 -- -Odph is equivalent to
2098 -- -O2 optimise as much as possible
2099 -- -fno-method-sharing sharing specialisation defeats fusion
2101 -- -fdicts-cheap always inline dictionaries
2102 -- -fmax-simplifier-iterations20 this is necessary sometimes
2103 -- -fsimplifier-phases=3 we use an additional simplifier phase
2105 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2106 -- -fno-spec-constr-count SpecConstr as much as possible
2107 -- -finline-enough-args hack to prevent excessive inlining
2109 setDPHOpt :: DynFlags -> DynFlags
2110 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2112 , specConstrThreshold = Nothing
2113 , specConstrCount = Nothing
2115 `dopt_set` Opt_DictsCheap
2116 `dopt_unset` Opt_MethodSharing
2117 `dopt_set` Opt_InlineIfEnoughArgs
2119 data DPHBackend = DPHPar
2122 deriving(Eq, Ord, Enum, Show)
2124 setDPHBackend :: DPHBackend -> DynP ()
2125 setDPHBackend backend
2127 upd $ \dflags -> dflags { dphBackend = backend }
2128 mapM_ exposePackage (dph_packages backend)
2130 dph_packages DPHThis = []
2131 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2132 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2134 dphPackage :: DynFlags -> PackageId
2135 dphPackage dflags = case dphBackend dflags of
2136 DPHPar -> dphParPackageId
2137 DPHSeq -> dphSeqPackageId
2138 DPHThis -> thisPackage dflags
2140 setMainIs :: String -> DynP ()
2142 | not (null main_fn) && isLower (head main_fn)
2143 -- The arg looked like "Foo.Bar.baz"
2144 = upd $ \d -> d{ mainFunIs = Just main_fn,
2145 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2147 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2148 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2150 | otherwise -- The arg looked like "baz"
2151 = upd $ \d -> d{ mainFunIs = Just arg }
2153 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2155 -----------------------------------------------------------------------------
2156 -- Paths & Libraries
2158 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2160 -- -i on its own deletes the import paths
2161 addImportPath "" = upd (\s -> s{importPaths = []})
2162 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2166 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2169 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2171 addFrameworkPath p =
2172 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2174 #ifndef mingw32_TARGET_OS
2175 split_marker :: Char
2176 split_marker = ':' -- not configurable (ToDo)
2179 splitPathList :: String -> [String]
2180 splitPathList s = filter notNull (splitUp s)
2181 -- empty paths are ignored: there might be a trailing
2182 -- ':' in the initial list, for example. Empty paths can
2183 -- cause confusion when they are translated into -I options
2184 -- for passing to gcc.
2186 #ifndef mingw32_TARGET_OS
2187 splitUp xs = split split_marker xs
2189 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2191 -- That is, if "foo:bar:baz" is used, this interpreted as
2192 -- consisting of three entries, 'foo', 'bar', 'baz'.
2193 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2194 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2196 -- Notice that no attempt is made to fully replace the 'standard'
2197 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2198 -- that this will cause too much breakage for users & ':' will
2199 -- work fine even with DOS paths, if you're not insisting on being silly.
2202 splitUp (x:':':div:xs) | div `elem` dir_markers
2203 = ((x:':':div:p): splitUp rs)
2205 (p,rs) = findNextPath xs
2206 -- we used to check for existence of the path here, but that
2207 -- required the IO monad to be threaded through the command-line
2208 -- parser which is quite inconvenient. The
2209 splitUp xs = cons p (splitUp rs)
2211 (p,rs) = findNextPath xs
2216 -- will be called either when we've consumed nought or the
2217 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2218 -- finding the next split marker.
2220 case break (`elem` split_markers) xs of
2221 (p, _:ds) -> (p, ds)
2224 split_markers :: [Char]
2225 split_markers = [':', ';']
2227 dir_markers :: [Char]
2228 dir_markers = ['/', '\\']
2231 -- -----------------------------------------------------------------------------
2232 -- tmpDir, where we store temporary files.
2234 setTmpDir :: FilePath -> DynFlags -> DynFlags
2235 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2236 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2237 -- seem necessary now --SDM 7/2/2008
2239 -----------------------------------------------------------------------------
2242 setOptHpcDir :: String -> DynP ()
2243 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2245 -----------------------------------------------------------------------------
2246 -- Via-C compilation stuff
2248 -- There are some options that we need to pass to gcc when compiling
2249 -- Haskell code via C, but are only supported by recent versions of
2250 -- gcc. The configure script decides which of these options we need,
2251 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2252 -- read before each via-C compilation. The advantage of having these
2253 -- in a separate file is that the file can be created at install-time
2254 -- depending on the available gcc version, and even re-generated later
2255 -- if gcc is upgraded.
2257 -- The options below are not dependent on the version of gcc, only the
2260 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2261 [String]) -- for registerised HC compilations
2262 machdepCCOpts _dflags
2263 #if alpha_TARGET_ARCH
2265 #ifdef HAVE_THREADED_RTS_SUPPORT
2269 -- For now, to suppress the gcc warning "call-clobbered
2270 -- register used for global register variable", we simply
2271 -- disable all warnings altogether using the -w flag. Oh well.
2273 #elif hppa_TARGET_ARCH
2274 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2275 -- (very nice, but too bad the HP /usr/include files don't agree.)
2276 = ( ["-D_HPUX_SOURCE"], [] )
2278 #elif m68k_TARGET_ARCH
2279 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2280 -- popping of args to routines to be explicit; if we let things
2281 -- be deferred 'til after an STGJUMP, imminent death is certain!
2283 -- -fomit-frame-pointer : *don't*
2284 -- It's better to have a6 completely tied up being a frame pointer
2285 -- rather than let GCC pick random things to do with it.
2286 -- (If we want to steal a6, then we would try to do things
2287 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2288 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2290 #elif i386_TARGET_ARCH
2291 -- -fno-defer-pop : basically the same game as for m68k
2293 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2294 -- the fp (%ebp) for our register maps.
2295 = let n_regs = stolen_x86_regs _dflags
2298 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2301 "-fomit-frame-pointer",
2302 -- we want -fno-builtin, because when gcc inlines
2303 -- built-in functions like memcpy() it tends to
2304 -- run out of registers, requiring -monly-n-regs
2306 "-DSTOLEN_X86_REGS="++show n_regs ]
2309 #elif ia64_TARGET_ARCH
2310 = ( [], ["-fomit-frame-pointer", "-G0"] )
2312 #elif x86_64_TARGET_ARCH
2314 #if darwin_TARGET_OS
2319 ["-fomit-frame-pointer",
2320 "-fno-asynchronous-unwind-tables",
2321 -- the unwind tables are unnecessary for HC code,
2322 -- and get in the way of -split-objs. Another option
2323 -- would be to throw them away in the mangler, but this
2326 -- calling builtins like strlen() using the FFI can
2327 -- cause gcc to run out of regs, so use the external
2331 #elif sparc_TARGET_ARCH
2333 -- For now, to suppress the gcc warning "call-clobbered
2334 -- register used for global register variable", we simply
2335 -- disable all warnings altogether using the -w flag. Oh well.
2337 #elif powerpc_apple_darwin_TARGET
2339 -- Disable Apple's precompiling preprocessor. It's a great thing
2340 -- for "normal" programs, but it doesn't support register variable
2342 = ( [], ["-no-cpp-precomp"] )
2347 picCCOpts :: DynFlags -> [String]
2349 #if darwin_TARGET_OS
2350 -- Apple prefers to do things the other way round.
2351 -- PIC is on by default.
2352 -- -mdynamic-no-pic:
2353 -- Turn off PIC code generation.
2355 -- Don't generate "common" symbols - these are unwanted
2356 -- in dynamic libraries.
2359 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2361 = ["-mdynamic-no-pic"]
2362 #elif mingw32_TARGET_OS
2363 -- no -fPIC for Windows
2365 = ["-U __PIC__","-D__PIC__"]
2369 | opt_PIC || not opt_Static
2370 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2375 -- -----------------------------------------------------------------------------
2379 can_split = cSplitObjs == "YES"
2381 -- -----------------------------------------------------------------------------
2384 data Printable = String String
2385 | FromDynFlags (DynFlags -> String)
2387 compilerInfo :: [(String, Printable)]
2388 compilerInfo = [("Project name", String cProjectName),
2389 ("Project version", String cProjectVersion),
2390 ("Booter version", String cBooterVersion),
2391 ("Stage", String cStage),
2392 ("Have interpreter", String cGhcWithInterpreter),
2393 ("Object splitting", String cSplitObjs),
2394 ("Have native code generator", String cGhcWithNativeCodeGen),
2395 ("Support SMP", String cGhcWithSMP),
2396 ("Unregisterised", String cGhcUnregisterised),
2397 ("Tables next to code", String cGhcEnableTablesNextToCode),
2398 ("Win32 DLLs", String cEnableWin32DLLs),
2399 ("RTS ways", String cGhcRTSWays),
2400 ("Leading underscore", String cLeadingUnderscore),
2401 ("Debug on", String (show debugIsOn)),
2402 ("LibDir", FromDynFlags topDir)