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
250 | Opt_PostfixOperators
253 | Opt_LiberalTypeSynonyms
256 | Opt_ImpredicativeTypes
259 | Opt_NewQualifiedOperators
262 | Opt_PrintExplicitForalls
269 | Opt_StaticArgumentTransformation
273 | Opt_IgnoreInterfacePragmas
274 | Opt_OmitInterfacePragmas
275 | Opt_DoLambdaEtaExpansion
279 | Opt_UnboxStrictFields
282 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
284 | Opt_RegsGraph -- do graph coloring register allocation
285 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
288 | Opt_AutoSccsOnAllToplevs
289 | Opt_AutoSccsOnExportedToplevs
290 | Opt_AutoSccsOnIndividualCafs
298 | Opt_ExcessPrecision
299 | Opt_EagerBlackHoling
300 | Opt_ReadUserPackageConf
304 | Opt_HideAllPackages
305 | Opt_PrintBindResult
309 | Opt_BreakOnException
311 | Opt_PrintEvldWithShow
312 | Opt_PrintBindContents
315 | Opt_EmitExternalCore
317 | Opt_BuildingCabalPackage
322 | Opt_ConvertToZipCfgAndBack
323 | Opt_AutoLinkPackages
324 | Opt_ImplicitImportQualified
333 | Opt_KeepRawTokenStream
337 -- | Contains not only a collection of 'DynFlag's but also a plethora of
338 -- information relating to the compilation of a single file or GHC session
339 data DynFlags = DynFlags {
342 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
343 stgToDo :: Maybe [StgToDo], -- similarly
344 hscTarget :: HscTarget,
345 hscOutName :: String, -- ^ Name of the output file
346 extCoreName :: String, -- ^ Name of the .hcr output file
347 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
348 optLevel :: Int, -- ^ Optimisation level
349 simplPhases :: Int, -- ^ Number of simplifier phases
350 maxSimplIterations :: Int, -- ^ Max simplifier iterations
351 shouldDumpSimplPhase :: SimplifierMode -> Bool,
352 ruleCheck :: Maybe String,
353 strictnessBefore :: [Int], -- ^ Additional demand analysis
355 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
356 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
357 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
359 #ifndef OMIT_NATIVE_CODEGEN
360 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
362 stolen_x86_regs :: Int,
363 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
364 importPaths :: [FilePath],
366 mainFunIs :: Maybe String,
367 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
369 dphBackend :: DPHBackend,
371 thisPackage :: PackageId, -- ^ name of package currently being compiled
374 ways :: [Way], -- ^ Way flags from the command line
375 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
376 rtsBuildTag :: String, -- ^ The RTS \"way\"
378 -- For object splitting
379 splitInfo :: Maybe (String,Int),
382 objectDir :: Maybe String,
383 hiDir :: Maybe String,
384 stubDir :: Maybe String,
390 outputFile :: Maybe String,
391 outputHi :: Maybe String,
392 dynLibLoader :: DynLibLoader,
394 -- | This is set by 'DriverPipeline.runPipeline' based on where
395 -- its output is going.
396 dumpPrefix :: Maybe FilePath,
398 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
399 -- Set by @-ddump-file-prefix@
400 dumpPrefixForce :: Maybe FilePath,
402 includePaths :: [String],
403 libraryPaths :: [String],
404 frameworkPaths :: [String], -- used on darwin only
405 cmdlineFrameworks :: [String], -- ditto
406 tmpDir :: String, -- no trailing '/'
408 ghcUsagePath :: FilePath, -- Filled in by SysTools
409 ghciUsagePath :: FilePath, -- ditto
411 hpcDir :: String, -- ^ Path to store the .mix files
413 -- options for particular phases
421 opt_windres :: [String],
423 -- commands for particular phases
425 pgm_P :: (String,[Option]),
427 pgm_c :: (String,[Option]),
428 pgm_m :: (String,[Option]),
429 pgm_s :: (String,[Option]),
430 pgm_a :: (String,[Option]),
431 pgm_l :: (String,[Option]),
432 pgm_dll :: (String,[Option]),
434 pgm_sysman :: String,
435 pgm_windres :: String,
438 depMakefile :: FilePath,
439 depIncludePkgDeps :: Bool,
440 depExcludeMods :: [ModuleName],
441 depSuffixes :: [String],
444 extraPkgConfs :: [FilePath],
445 topDir :: FilePath, -- filled in by SysTools
446 systemPackageConfig :: FilePath, -- ditto
447 -- ^ The @-package-conf@ flags given on the command line, in the order
450 packageFlags :: [PackageFlag],
451 -- ^ The @-package@ and @-hide-package@ flags from the command-line
454 -- NB. do not modify this field, it is calculated by
455 -- Packages.initPackages and Packages.updatePackages.
456 pkgDatabase :: Maybe [PackageConfig],
457 pkgState :: PackageState,
460 -- These have to be IORefs, because the defaultCleanupHandler needs to
461 -- know what to clean when an exception happens
462 filesToClean :: IORef [FilePath],
463 dirsToClean :: IORef (FiniteMap FilePath FilePath),
468 -- | Message output action: use "ErrUtils" instead of this if you can
469 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
471 haddockOptions :: Maybe String
474 wayNames :: DynFlags -> [WayName]
475 wayNames = map wayName . ways
477 -- | The target code type of the compilation (if any).
479 -- Whenever you change the target, also make sure to set 'ghcLink' to
480 -- something sensible.
482 -- 'HscNothing' can be used to avoid generating any output, however, note
485 -- * This will not run the desugaring step, thus no warnings generated in
486 -- this step will be output. In particular, this includes warnings related
487 -- to pattern matching. You can run the desugarer manually using
488 -- 'GHC.desugarModule'.
490 -- * If a program uses Template Haskell the typechecker may try to run code
491 -- from an imported module. This will fail if no code has been generated
492 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
493 -- whether this might be the case and choose to either switch to a
494 -- different target or avoid typechecking such modules. (The latter may
495 -- preferable for security reasons.)
498 = HscC -- ^ Generate C code.
499 | HscAsm -- ^ Generate assembly using the native code generator.
500 | HscJava -- ^ Generate Java bytecode.
501 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
502 | HscNothing -- ^ Don't generate any code. See notes above.
505 -- | Will this target result in an object file on the disk?
506 isObjectTarget :: HscTarget -> Bool
507 isObjectTarget HscC = True
508 isObjectTarget HscAsm = True
509 isObjectTarget _ = False
511 -- | The 'GhcMode' tells us whether we're doing multi-module
512 -- compilation (controlled via the "GHC" API) or one-shot
513 -- (single-module) compilation. This makes a difference primarily to
514 -- the "Finder": in one-shot mode we look for interface files for
515 -- imported modules, but in multi-module mode we look for source files
516 -- in order to check whether they need to be recompiled.
518 = CompManager -- ^ @\-\-make@, GHCi, etc.
519 | OneShot -- ^ @ghc -c Foo.hs@
520 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
523 instance Outputable GhcMode where
524 ppr CompManager = ptext (sLit "CompManager")
525 ppr OneShot = ptext (sLit "OneShot")
526 ppr MkDepend = ptext (sLit "MkDepend")
528 isOneShot :: GhcMode -> Bool
529 isOneShot OneShot = True
530 isOneShot _other = False
532 -- | What to do in the link step, if there is one.
534 = NoLink -- ^ Don't link at all
535 | LinkBinary -- ^ Link object code into a binary
536 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
537 -- bytecode and object code).
538 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
541 isNoLink :: GhcLink -> Bool
542 isNoLink NoLink = True
545 -- Is it worth evaluating this Bool and caching it in the DynFlags value
546 -- during initDynFlags?
547 doingTickyProfiling :: DynFlags -> Bool
548 doingTickyProfiling _ = opt_Ticky
549 -- XXX -ticky is a static flag, because it implies -debug which is also
550 -- static. If the way flags were made dynamic, we could fix this.
553 = ExposePackage String
554 | ExposePackageId String
556 | IgnorePackage String
559 defaultHscTarget :: HscTarget
560 defaultHscTarget = defaultObjectTarget
562 -- | The 'HscTarget' value corresponding to the default way to create
563 -- object files on the current platform.
564 defaultObjectTarget :: HscTarget
566 | cGhcWithNativeCodeGen == "YES" = HscAsm
571 | Wrapped (Maybe String)
575 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
576 initDynFlags :: DynFlags -> IO DynFlags
577 initDynFlags dflags = do
578 -- someday these will be dynamic flags
579 ways <- readIORef v_Ways
580 refFilesToClean <- newIORef []
581 refDirsToClean <- newIORef emptyFM
584 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
585 rtsBuildTag = mkBuildTag ways,
586 filesToClean = refFilesToClean,
587 dirsToClean = refDirsToClean
590 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
591 -- and must be fully initialized by 'GHC.newSession' first.
592 defaultDynFlags :: DynFlags
595 ghcMode = CompManager,
596 ghcLink = LinkBinary,
599 hscTarget = defaultHscTarget,
605 maxSimplIterations = 4,
606 shouldDumpSimplPhase = const False,
608 specConstrThreshold = Just 200,
609 specConstrCount = Just 3,
610 liberateCaseThreshold = Just 200,
611 strictnessBefore = [],
613 #ifndef OMIT_NATIVE_CODEGEN
614 targetPlatform = defaultTargetPlatform,
617 cmdlineHcIncludes = [],
621 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
625 thisPackage = mainPackageId,
631 objectSuf = phaseInputExt StopLn,
632 hcSuf = phaseInputExt HCc,
635 outputFile = Nothing,
637 dynLibLoader = SystemDependent,
638 dumpPrefix = Nothing,
639 dumpPrefixForce = Nothing,
643 cmdlineFrameworks = [],
644 tmpDir = cDEFAULT_TMPDIR,
650 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
661 pkgDatabase = Nothing,
662 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
663 ways = panic "defaultDynFlags: No ways",
664 buildTag = panic "defaultDynFlags: No buildTag",
665 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
667 -- initSysTools fills all these in
668 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
669 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
670 topDir = panic "defaultDynFlags: No topDir",
671 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
672 pgm_L = panic "defaultDynFlags: No pgm_L",
673 pgm_P = panic "defaultDynFlags: No pgm_P",
674 pgm_F = panic "defaultDynFlags: No pgm_F",
675 pgm_c = panic "defaultDynFlags: No pgm_c",
676 pgm_m = panic "defaultDynFlags: No pgm_m",
677 pgm_s = panic "defaultDynFlags: No pgm_s",
678 pgm_a = panic "defaultDynFlags: No pgm_a",
679 pgm_l = panic "defaultDynFlags: No pgm_l",
680 pgm_dll = panic "defaultDynFlags: No pgm_dll",
681 pgm_T = panic "defaultDynFlags: No pgm_T",
682 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
683 pgm_windres = panic "defaultDynFlags: No pgm_windres",
684 -- end of initSysTools values
686 depMakefile = "Makefile",
687 depIncludePkgDeps = False,
690 -- end of ghc -M values
691 filesToClean = panic "defaultDynFlags: No filesToClean",
692 dirsToClean = panic "defaultDynFlags: No dirsToClean",
693 haddockOptions = Nothing,
695 Opt_AutoLinkPackages,
696 Opt_ReadUserPackageConf,
698 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
699 -- behaviour the default, to see if anyone notices
703 Opt_MonomorphismRestriction,
714 Opt_PrintBindContents
716 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
717 -- The default -O0 options
720 log_action = \severity srcSpan style msg ->
722 SevInfo -> printErrs (msg style)
723 SevFatal -> printErrs (msg style)
726 printErrs ((mkLocMessage srcSpan msg) style)
727 -- careful (#2302): printErrs prints in UTF-8, whereas
728 -- converting to string first and using hPutStr would
729 -- just emit the low 8 bits of each unicode char.
736 0 | print errors & warnings only
737 1 | minimal verbosity: print "compiling M ... done." for each module.
738 2 | equivalent to -dshow-passes
739 3 | equivalent to existing "ghc -v"
740 4 | "ghc -v -ddump-most"
741 5 | "ghc -v -ddump-all"
744 -- | Test whether a 'DynFlag' is set
745 dopt :: DynFlag -> DynFlags -> Bool
746 dopt f dflags = f `elem` (flags dflags)
749 dopt_set :: DynFlags -> DynFlag -> DynFlags
750 dopt_set dfs f = dfs{ flags = f : flags dfs }
752 -- | Unset a 'DynFlag'
753 dopt_unset :: DynFlags -> DynFlag -> DynFlags
754 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
756 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
757 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
758 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
759 -> [a] -- ^ Correctly ordered extracted options
760 getOpts dflags opts = reverse (opts dflags)
761 -- We add to the options from the front, so we need to reverse the list
763 -- | Gets the verbosity flag for the current verbosity level. This is fed to
764 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
765 getVerbFlag :: DynFlags -> String
767 | verbosity dflags >= 3 = "-v"
770 setObjectDir, setHiDir, setStubDir, setOutputDir,
771 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
772 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
773 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
774 addCmdlineFramework, addHaddockOpts
775 :: String -> DynFlags -> DynFlags
776 setOutputFile, setOutputHi, setDumpPrefixForce
777 :: Maybe String -> DynFlags -> DynFlags
779 setObjectDir f d = d{ objectDir = Just f}
780 setHiDir f d = d{ hiDir = Just f}
781 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
782 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
783 -- \#included from the .hc file when compiling with -fvia-C.
784 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
786 setObjectSuf f d = d{ objectSuf = f}
787 setHiSuf f d = d{ hiSuf = f}
788 setHcSuf f d = d{ hcSuf = f}
790 setOutputFile f d = d{ outputFile = f}
791 setOutputHi f d = d{ outputHi = f}
793 parseDynLibLoaderMode f d =
795 ("deploy", "") -> d{ dynLibLoader = Deployable }
796 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
797 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
798 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
799 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
800 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
802 setDumpPrefixForce f d = d { dumpPrefixForce = f}
804 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
805 -- Config.hs should really use Option.
806 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
808 setPgmL f d = d{ pgm_L = f}
809 setPgmF f d = d{ pgm_F = f}
810 setPgmc f d = d{ pgm_c = (f,[])}
811 setPgmm f d = d{ pgm_m = (f,[])}
812 setPgms f d = d{ pgm_s = (f,[])}
813 setPgma f d = d{ pgm_a = (f,[])}
814 setPgml f d = d{ pgm_l = (f,[])}
815 setPgmdll f d = d{ pgm_dll = (f,[])}
816 setPgmwindres f d = d{ pgm_windres = f}
818 addOptL f d = d{ opt_L = f : opt_L d}
819 addOptP f d = d{ opt_P = f : opt_P d}
820 addOptF f d = d{ opt_F = f : opt_F d}
821 addOptc f d = d{ opt_c = f : opt_c d}
822 addOptm f d = d{ opt_m = f : opt_m d}
823 addOpta f d = d{ opt_a = f : opt_a d}
824 addOptl f d = d{ opt_l = f : opt_l d}
825 addOptwindres f d = d{ opt_windres = f : opt_windres d}
827 setDepMakefile :: FilePath -> DynFlags -> DynFlags
828 setDepMakefile f d = d { depMakefile = deOptDep f }
830 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
831 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
833 addDepExcludeMod :: String -> DynFlags -> DynFlags
835 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
837 addDepSuffix :: FilePath -> DynFlags -> DynFlags
838 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
841 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
842 -- we need to strip the "-optdep" off of the arg
843 deOptDep :: String -> String
844 deOptDep x = case stripPrefix "-optdep" x of
848 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
850 addHaddockOpts f d = d{ haddockOptions = Just f}
852 -- -----------------------------------------------------------------------------
853 -- Command-line options
855 -- | When invoking external tools as part of the compilation pipeline, we
856 -- pass these a sequence of options on the command-line. Rather than
857 -- just using a list of Strings, we use a type that allows us to distinguish
858 -- between filepaths and 'other stuff'. The reason for this is that
859 -- this type gives us a handle on transforming filenames, and filenames only,
860 -- to whatever format they're expected to be on a particular platform.
862 = FileOption -- an entry that _contains_ filename(s) / filepaths.
863 String -- a non-filepath prefix that shouldn't be
864 -- transformed (e.g., "/out=")
865 String -- the filepath/filename portion
868 showOpt :: Option -> String
869 showOpt (FileOption pre f) = pre ++ f
870 showOpt (Option s) = s
872 -----------------------------------------------------------------------------
873 -- Setting the optimisation level
875 updOptLevel :: Int -> DynFlags -> DynFlags
876 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
878 = dfs2{ optLevel = final_n }
880 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
881 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
882 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
884 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
885 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
887 optLevelFlags :: [([Int], DynFlag)]
889 = [ ([0], Opt_IgnoreInterfacePragmas)
890 , ([0], Opt_OmitInterfacePragmas)
892 , ([1,2], Opt_IgnoreAsserts)
893 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
895 , ([1,2], Opt_DoEtaReduction)
896 , ([1,2], Opt_CaseMerge)
897 , ([1,2], Opt_Strictness)
899 , ([1,2], Opt_FullLaziness)
900 , ([1,2], Opt_Specialise)
901 , ([1,2], Opt_FloatIn)
903 , ([2], Opt_LiberateCase)
904 , ([2], Opt_SpecConstr)
906 -- , ([2], Opt_StaticArgumentTransformation)
907 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
908 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
909 -- several improvements to the heuristics, and I'm concerned that without
910 -- those changes SAT will interfere with some attempts to write "high
911 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
912 -- this year. In particular, the version in HEAD lacks the tail call
913 -- criterion, so many things that look like reasonable loops will be
914 -- turned into functions with extra (unneccesary) thunk creation.
916 , ([0,1,2], Opt_DoLambdaEtaExpansion)
917 -- This one is important for a tiresome reason:
918 -- we want to make sure that the bindings for data
919 -- constructors are eta-expanded. This is probably
920 -- a good thing anyway, but it seems fragile.
923 -- -----------------------------------------------------------------------------
924 -- Standard sets of warning options
926 standardWarnings :: [DynFlag]
928 = [ Opt_WarnWarningsDeprecations,
929 Opt_WarnDeprecatedFlags,
930 Opt_WarnUnrecognisedPragmas,
931 Opt_WarnOverlappingPatterns,
932 Opt_WarnMissingFields,
933 Opt_WarnMissingMethods,
934 Opt_WarnDuplicateExports,
935 Opt_WarnLazyUnliftedBindings,
936 Opt_WarnDodgyForeignImports,
940 minusWOpts :: [DynFlag]
942 = standardWarnings ++
943 [ Opt_WarnUnusedBinds,
944 Opt_WarnUnusedMatches,
945 Opt_WarnUnusedImports,
946 Opt_WarnIncompletePatterns,
947 Opt_WarnDodgyExports,
951 minusWallOpts :: [DynFlag]
954 [ Opt_WarnTypeDefaults,
955 Opt_WarnNameShadowing,
962 -- minuswRemovesOpts should be every warning option
963 minuswRemovesOpts :: [DynFlag]
966 [Opt_WarnImplicitPrelude,
967 Opt_WarnIncompletePatternsRecUpd,
968 Opt_WarnSimplePatterns,
969 Opt_WarnMonomorphism,
970 Opt_WarnUnrecognisedPragmas,
974 -- -----------------------------------------------------------------------------
975 -- CoreToDo: abstraction of core-to-core passes to run.
977 data CoreToDo -- These are diff core-to-core passes,
978 -- which may be invoked in any order,
979 -- as many times as you like.
981 = CoreDoSimplify -- The core-to-core simplifier.
984 -- Each run of the simplifier can take a different
985 -- set of simplifier-specific flags.
987 | CoreDoFloatOutwards FloatOutSwitches
992 | CoreDoWorkerWrapper
995 | CoreDoOldStrictness
998 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
999 -- matching this string
1000 | CoreDoVectorisation PackageId
1001 | CoreDoNothing -- Useful when building up
1002 | CoreDoPasses [CoreToDo] -- lists of these things
1005 data SimplifierMode -- See comments in SimplMonad
1007 { sm_rules :: Bool -- Whether RULES are enabled
1008 , sm_inline :: Bool } -- Whether inlining is enabled
1011 { sm_num :: Int -- Phase number; counts downward so 0 is last phase
1012 , sm_names :: [String] } -- Name(s) of the phase
1014 instance Outputable SimplifierMode where
1015 ppr (SimplPhase { sm_num = n, sm_names = ss })
1016 = int n <+> brackets (text (concat $ intersperse "," ss))
1017 ppr (SimplGently { sm_rules = r, sm_inline = i })
1018 = ptext (sLit "gentle") <>
1019 brackets (pp_flag r (sLit "rules") <> comma <>
1020 pp_flag i (sLit "inline"))
1022 pp_flag f s = ppUnless f (ptext (sLit "no")) <+> ptext s
1024 data SimplifierSwitch
1025 = MaxSimplifierIterations Int
1028 data FloatOutSwitches = FloatOutSwitches {
1029 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1030 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1031 -- even if they do not escape a lambda
1034 instance Outputable FloatOutSwitches where
1035 ppr = pprFloatOutSwitches
1037 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1038 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1039 <+> pp_not (floatOutConstants sw) <+> text "constants"
1042 pp_not False = text "not"
1044 -- | Switches that specify the minimum amount of floating out
1045 -- gentleFloatOutSwitches :: FloatOutSwitches
1046 -- gentleFloatOutSwitches = FloatOutSwitches False False
1048 -- | Switches that do not specify floating out of lambdas, just of constants
1049 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1050 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1053 -- The core-to-core pass ordering is derived from the DynFlags:
1054 runWhen :: Bool -> CoreToDo -> CoreToDo
1055 runWhen True do_this = do_this
1056 runWhen False _ = CoreDoNothing
1058 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1059 runMaybe (Just x) f = f x
1060 runMaybe Nothing _ = CoreDoNothing
1062 getCoreToDo :: DynFlags -> [CoreToDo]
1064 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1065 | otherwise = core_todo
1067 opt_level = optLevel dflags
1068 phases = simplPhases dflags
1069 max_iter = maxSimplIterations dflags
1070 strictness = dopt Opt_Strictness dflags
1071 full_laziness = dopt Opt_FullLaziness dflags
1072 do_specialise = dopt Opt_Specialise dflags
1073 do_float_in = dopt Opt_FloatIn dflags
1074 cse = dopt Opt_CSE dflags
1075 spec_constr = dopt Opt_SpecConstr dflags
1076 liberate_case = dopt Opt_LiberateCase dflags
1077 rule_check = ruleCheck dflags
1078 static_args = dopt Opt_StaticArgumentTransformation dflags
1080 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1082 maybe_strictness_before phase
1083 = runWhen (phase `elem` strictnessBefore dflags) CoreDoStrictness
1085 simpl_phase phase names iter
1087 [ maybe_strictness_before phase,
1088 CoreDoSimplify (SimplPhase phase names) [
1089 MaxSimplifierIterations iter
1091 maybe_rule_check phase
1095 = runWhen (dopt Opt_Vectorise dflags)
1096 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1099 -- By default, we have 2 phases before phase 0.
1101 -- Want to run with inline phase 2 after the specialiser to give
1102 -- maximum chance for fusion to work before we inline build/augment
1103 -- in phase 1. This made a difference in 'ansi' where an
1104 -- overloaded function wasn't inlined till too late.
1106 -- Need phase 1 so that build/augment get
1107 -- inlined. I found that spectral/hartel/genfft lost some useful
1108 -- strictness in the function sumcode' if augment is not inlined
1109 -- before strictness analysis runs
1110 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1111 | phase <- [phases, phases-1 .. 1] ]
1114 -- initial simplify: mk specialiser happy: minimum effort please
1115 simpl_gently = CoreDoSimplify
1116 (SimplGently { sm_rules = True, sm_inline = False })
1118 -- Simplify "gently"
1119 -- Don't inline anything till full laziness has bitten
1120 -- In particular, inlining wrappers inhibits floating
1121 -- e.g. ...(case f x of ...)...
1122 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1123 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1124 -- and now the redex (f x) isn't floatable any more
1125 -- Similarly, don't apply any rules until after full
1126 -- laziness. Notably, list fusion can prevent floating.
1128 NoCaseOfCase, -- Don't do case-of-case transformations.
1129 -- This makes full laziness work better
1130 MaxSimplifierIterations max_iter
1134 if opt_level == 0 then
1136 simpl_phase 0 ["final"] max_iter]
1137 else {- opt_level >= 1 -} [
1139 -- We want to do the static argument transform before full laziness as it
1140 -- may expose extra opportunities to float things outwards. However, to fix
1141 -- up the output of the transformation we need at do at least one simplify
1142 -- after this before anything else
1143 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1145 -- We run vectorisation here for now, but we might also try to run
1149 -- initial simplify: mk specialiser happy: minimum effort please
1152 -- Specialisation is best done before full laziness
1153 -- so that overloaded functions have all their dictionary lambdas manifest
1154 runWhen do_specialise CoreDoSpecialising,
1156 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1157 -- Was: gentleFloatOutSwitches
1158 -- I have no idea why, but not floating constants to top level is
1159 -- very bad in some cases.
1160 -- Notably: p_ident in spectral/rewrite
1161 -- Changing from "gentle" to "constantsOnly" improved
1162 -- rewrite's allocation by 19%, and made 0.0% difference
1163 -- to any other nofib benchmark
1165 runWhen do_float_in CoreDoFloatInwards,
1169 -- Phase 0: allow all Ids to be inlined now
1170 -- This gets foldr inlined before strictness analysis
1172 -- At least 3 iterations because otherwise we land up with
1173 -- huge dead expressions because of an infelicity in the
1175 -- let k = BIG in foldr k z xs
1176 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1177 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1179 simpl_phase 0 ["main"] (max max_iter 3),
1182 #ifdef OLD_STRICTNESS
1183 CoreDoOldStrictness,
1185 runWhen strictness (CoreDoPasses [
1187 CoreDoWorkerWrapper,
1189 simpl_phase 0 ["post-worker-wrapper"] max_iter
1192 runWhen full_laziness
1193 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1194 -- nofib/spectral/hartel/wang doubles in speed if you
1195 -- do full laziness late in the day. It only happens
1196 -- after fusion and other stuff, so the early pass doesn't
1197 -- catch it. For the record, the redex is
1198 -- f_el22 (f_el21 r_midblock)
1201 runWhen cse CoreCSE,
1202 -- We want CSE to follow the final full-laziness pass, because it may
1203 -- succeed in commoning up things floated out by full laziness.
1204 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1206 runWhen do_float_in CoreDoFloatInwards,
1210 -- Case-liberation for -O2. This should be after
1211 -- strictness analysis and the simplification which follows it.
1212 runWhen liberate_case (CoreDoPasses [
1214 simpl_phase 0 ["post-liberate-case"] max_iter
1215 ]), -- Run the simplifier after LiberateCase to vastly
1216 -- reduce the possiblility of shadowing
1217 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1219 runWhen spec_constr CoreDoSpecConstr,
1223 -- Final clean-up simplification:
1224 simpl_phase 0 ["final"] max_iter
1227 -- -----------------------------------------------------------------------------
1228 -- StgToDo: abstraction of stg-to-stg passes to run.
1231 = StgDoMassageForProfiling -- should be (next to) last
1232 -- There's also setStgVarInfo, but its absolute "lastness"
1233 -- is so critical that it is hardwired in (no flag).
1236 getStgToDo :: DynFlags -> [StgToDo]
1238 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1241 stg_stats = dopt Opt_StgStats dflags
1243 todo1 = if stg_stats then [D_stg_stats] else []
1245 todo2 | WayProf `elem` wayNames dflags
1246 = StgDoMassageForProfiling : todo1
1250 -- -----------------------------------------------------------------------------
1253 allFlags :: [String]
1254 allFlags = map ('-':) $
1255 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1256 map ("fno-"++) flags ++
1257 map ("f"++) flags ++
1258 map ("X"++) supportedLanguages ++
1259 map ("XNo"++) supportedLanguages
1260 where ok (PrefixPred _ _) = False
1262 flags = [ name | (name, _, _) <- fFlags ]
1264 dynamic_flags :: [Flag DynP]
1266 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1267 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1268 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1269 , Flag "#include" (HasArg (addCmdlineHCInclude))
1270 (Deprecated "No longer has any effect")
1271 , Flag "v" (OptIntSuffix setVerbosity) Supported
1273 ------- Specific phases --------------------------------------------
1274 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1275 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1276 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1277 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1278 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1279 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1280 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1281 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1282 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1283 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1285 , Flag "optL" (HasArg (upd . addOptL)) Supported
1286 , Flag "optP" (HasArg (upd . addOptP)) Supported
1287 , Flag "optF" (HasArg (upd . addOptF)) Supported
1288 , Flag "optc" (HasArg (upd . addOptc)) Supported
1289 , Flag "optm" (HasArg (upd . addOptm)) Supported
1290 , Flag "opta" (HasArg (upd . addOpta)) Supported
1291 , Flag "optl" (HasArg (upd . addOptl)) Supported
1292 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1295 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1298 -------- ghc -M -----------------------------------------------------
1299 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1300 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1301 (Deprecated "Use -dep-suffix instead")
1302 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1303 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1304 (Deprecated "Use -dep-makefile instead")
1305 , Flag "optdep-w" (NoArg (return ()))
1306 (Deprecated "-optdep-w doesn't do anything")
1307 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1308 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1309 (Deprecated "Use -include-pkg-deps instead")
1310 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1311 (Deprecated "Use -include-pkg-deps instead")
1312 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1313 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1314 (Deprecated "Use -exclude-module instead")
1315 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1316 (Deprecated "Use -exclude-module instead")
1318 -------- Linking ----------------------------------------------------
1319 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1321 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1322 (Deprecated "Use -c instead")
1323 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1325 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1328 ------- Libraries ---------------------------------------------------
1329 , Flag "L" (Prefix addLibraryPath ) Supported
1330 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1332 ------- Frameworks --------------------------------------------------
1333 -- -framework-path should really be -F ...
1334 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1335 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1337 ------- Output Redirection ------------------------------------------
1338 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1339 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1340 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1341 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1342 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1343 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1344 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1345 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1346 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1347 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1348 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1351 ------- Keeping temporary files -------------------------------------
1352 -- These can be singular (think ghc -c) or plural (think ghc --make)
1353 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1354 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1355 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1356 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1357 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1358 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1359 -- This only makes sense as plural
1360 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1362 ------- Miscellaneous ----------------------------------------------
1363 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1364 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1365 , Flag "main-is" (SepArg setMainIs ) Supported
1366 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1367 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1368 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1370 ------- recompilation checker --------------------------------------
1371 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1372 (Deprecated "Use -fno-force-recomp instead")
1373 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1374 (Deprecated "Use -fforce-recomp instead")
1376 ------ HsCpp opts ---------------------------------------------------
1377 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1378 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1380 ------- Include/Import Paths ----------------------------------------
1381 , Flag "I" (Prefix addIncludePath) Supported
1382 , Flag "i" (OptPrefix addImportPath ) Supported
1384 ------ Debugging ----------------------------------------------------
1385 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1387 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1389 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1391 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1393 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1395 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1397 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1399 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1401 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1403 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1405 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1407 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1409 , Flag "ddump-asm-regalloc-stages"
1410 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1412 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1414 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1416 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1418 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1420 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1422 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1424 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1426 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1428 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1430 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1432 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1434 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1436 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1438 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1440 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1442 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1444 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1446 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1448 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1450 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1452 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1454 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1456 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1458 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1460 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1462 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1464 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1466 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1468 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1470 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1472 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1474 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1476 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1478 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1480 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1482 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1484 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1486 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1488 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1490 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1492 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1494 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1496 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1498 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1501 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1503 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1505 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1507 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1509 , Flag "dshow-passes"
1510 (NoArg (do forceRecompile
1511 setVerbosity (Just 2)))
1513 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1516 ------ Machine dependant (-m<blah>) stuff ---------------------------
1518 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1520 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1522 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1525 ------ Warning opts -------------------------------------------------
1526 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1528 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1530 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1532 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1534 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1535 (Deprecated "Use -w instead")
1536 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1539 ------ Optimisation flags ------------------------------------------
1540 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1541 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1542 (Deprecated "Use -O0 instead")
1543 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1544 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1546 -- If the number is missing, use 1
1548 , Flag "fsimplifier-phases"
1549 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1551 , Flag "fmax-simplifier-iterations"
1552 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1555 , Flag "fspec-constr-threshold"
1556 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1558 , Flag "fno-spec-constr-threshold"
1559 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1561 , Flag "fspec-constr-count"
1562 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1564 , Flag "fno-spec-constr-count"
1565 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1567 , Flag "fliberate-case-threshold"
1568 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1570 , Flag "fno-liberate-case-threshold"
1571 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1574 , Flag "frule-check"
1575 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1577 , Flag "fcontext-stack"
1578 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1581 , Flag "fstrictness-before"
1582 (IntSuffix (\n -> upd (\dfs -> dfs{ strictnessBefore = n : strictnessBefore dfs })))
1585 ------ Profiling ----------------------------------------------------
1587 -- XXX Should the -f* flags be deprecated?
1588 -- They don't seem to be documented
1589 , Flag "fauto-sccs-on-all-toplevs"
1590 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1593 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1595 , Flag "no-auto-all"
1596 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1598 , Flag "fauto-sccs-on-exported-toplevs"
1599 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1602 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1605 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1607 , Flag "fauto-sccs-on-individual-cafs"
1608 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1611 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1614 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1617 ------ DPH flags ----------------------------------------------------
1620 (NoArg (setDPHBackend DPHSeq))
1623 (NoArg (setDPHBackend DPHPar))
1626 (NoArg (setDPHBackend DPHThis))
1629 ------ Compiler flags -----------------------------------------------
1631 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1632 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1633 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1635 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1636 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1637 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1639 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1641 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1644 ++ map (mkFlag True "f" setDynFlag ) fFlags
1645 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1646 ++ map (mkFlag True "X" setDynFlag ) xFlags
1647 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1649 package_flags :: [Flag DynP]
1651 ------- Packages ----------------------------------------------------
1652 Flag "package-conf" (HasArg extraPkgConf_) Supported
1653 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1655 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1656 , Flag "package-id" (HasArg exposePackageId) Supported
1657 , Flag "package" (HasArg exposePackage) Supported
1658 , Flag "hide-package" (HasArg hidePackage) Supported
1659 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1661 , Flag "ignore-package" (HasArg ignorePackage)
1663 , Flag "syslib" (HasArg exposePackage)
1664 (Deprecated "Use -package instead")
1667 mkFlag :: Bool -- ^ True <=> it should be turned on
1668 -> String -- ^ The flag prefix
1669 -> (DynFlag -> DynP ())
1670 -> (String, DynFlag, Bool -> Deprecated)
1672 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1673 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1675 deprecatedForLanguage :: String -> Bool -> Deprecated
1676 deprecatedForLanguage lang turn_on
1677 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1679 flag | turn_on = lang
1680 | otherwise = "No"++lang
1682 useInstead :: String -> Bool -> Deprecated
1683 useInstead flag turn_on
1684 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1686 no = if turn_on then "" else "no-"
1688 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1689 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1691 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1692 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1693 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1694 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1695 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1696 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1697 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1698 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1699 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1700 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1701 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1702 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1703 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1704 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1705 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1706 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1707 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1708 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1709 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1710 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1711 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1712 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1713 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1714 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1715 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1716 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1717 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1718 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1719 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1720 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1721 ( "strictness", Opt_Strictness, const Supported ),
1722 ( "specialise", Opt_Specialise, const Supported ),
1723 ( "float-in", Opt_FloatIn, const Supported ),
1724 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1725 ( "full-laziness", Opt_FullLaziness, const Supported ),
1726 ( "liberate-case", Opt_LiberateCase, const Supported ),
1727 ( "spec-constr", Opt_SpecConstr, const Supported ),
1728 ( "cse", Opt_CSE, const Supported ),
1729 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1730 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1731 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1732 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1733 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1734 ( "case-merge", Opt_CaseMerge, const Supported ),
1735 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1736 ( "method-sharing", Opt_MethodSharing, const Supported ),
1737 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1738 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1739 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1740 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1741 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1742 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1743 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1744 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1745 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1746 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1747 ( "break-on-error", Opt_BreakOnError, const Supported ),
1748 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1749 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1750 ( "run-cps", Opt_RunCPS, const Supported ),
1751 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1752 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1753 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1754 ( "vectorise", Opt_Vectorise, const Supported ),
1755 ( "regs-graph", Opt_RegsGraph, const Supported ),
1756 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1757 ( "th", Opt_TemplateHaskell,
1758 deprecatedForLanguage "TemplateHaskell" ),
1759 ( "fi", Opt_ForeignFunctionInterface,
1760 deprecatedForLanguage "ForeignFunctionInterface" ),
1761 ( "ffi", Opt_ForeignFunctionInterface,
1762 deprecatedForLanguage "ForeignFunctionInterface" ),
1763 ( "arrows", Opt_Arrows,
1764 deprecatedForLanguage "Arrows" ),
1765 ( "generics", Opt_Generics,
1766 deprecatedForLanguage "Generics" ),
1767 ( "implicit-prelude", Opt_ImplicitPrelude,
1768 deprecatedForLanguage "ImplicitPrelude" ),
1769 ( "bang-patterns", Opt_BangPatterns,
1770 deprecatedForLanguage "BangPatterns" ),
1771 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1772 deprecatedForLanguage "MonomorphismRestriction" ),
1773 ( "mono-pat-binds", Opt_MonoPatBinds,
1774 deprecatedForLanguage "MonoPatBinds" ),
1775 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1776 deprecatedForLanguage "ExtendedDefaultRules" ),
1777 ( "implicit-params", Opt_ImplicitParams,
1778 deprecatedForLanguage "ImplicitParams" ),
1779 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1780 deprecatedForLanguage "ScopedTypeVariables" ),
1782 deprecatedForLanguage "PArr" ),
1783 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1784 deprecatedForLanguage "OverlappingInstances" ),
1785 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1786 deprecatedForLanguage "UndecidableInstances" ),
1787 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1788 deprecatedForLanguage "IncoherentInstances" ),
1789 ( "gen-manifest", Opt_GenManifest, const Supported ),
1790 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1791 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1792 ( "shared-implib", Opt_SharedImplib, const Supported ),
1793 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1794 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1797 supportedLanguages :: [String]
1798 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1800 -- This may contain duplicates
1801 languageOptions :: [DynFlag]
1802 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1804 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1805 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1807 ( "CPP", Opt_Cpp, const Supported ),
1808 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1809 ( "TupleSections", Opt_TupleSections, const Supported ),
1810 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1811 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1812 ( "MagicHash", Opt_MagicHash, const Supported ),
1813 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1814 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1815 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1816 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1817 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1818 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1819 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1820 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1821 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1822 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1823 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1824 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1825 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1826 const $ Deprecated "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1827 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1828 ( "RecursiveDo", Opt_RecursiveDo,
1829 deprecatedForLanguage "DoRec"),
1830 ( "DoRec", Opt_DoRec, const Supported ),
1831 ( "Arrows", Opt_Arrows, const Supported ),
1832 ( "PArr", Opt_PArr, const Supported ),
1833 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1834 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1835 ( "Generics", Opt_Generics, const Supported ),
1837 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1838 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1839 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1840 ( "RecordPuns", Opt_RecordPuns,
1841 deprecatedForLanguage "NamedFieldPuns" ),
1842 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1843 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1844 ( "GADTs", Opt_GADTs, const Supported ),
1845 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1846 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1847 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1849 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1851 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1852 -- On by default (which is not strictly H98):
1853 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1854 ( "ExplicitForAll", Opt_ExplicitForAll, const Supported ),
1855 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1856 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1857 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1858 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1859 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1861 ( "PatternSignatures", Opt_ScopedTypeVariables,
1862 deprecatedForLanguage "ScopedTypeVariables" ),
1864 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1865 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1866 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1867 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1868 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1869 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1870 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1871 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1872 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1873 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1874 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1875 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1876 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1877 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1878 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1879 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1880 ( "PackageImports", Opt_PackageImports, const Supported ),
1881 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1884 impliedFlags :: [(DynFlag, DynFlag)]
1886 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1887 , (Opt_Rank2Types, Opt_ExplicitForAll)
1888 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1889 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1890 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1891 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1893 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1894 -- be completely rigid for GADTs
1896 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1897 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1898 -- all over the place
1900 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1901 -- Note [Scoped tyvars] in TcBinds
1902 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1904 -- Record wild-cards implies field disambiguation
1905 -- Otherwise if you write (C {..}) you may well get
1906 -- stuff like " 'a' not in scope ", which is a bit silly
1907 -- if the compiler has just filled in field 'a' of constructor 'C'
1908 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1911 glasgowExtsFlags :: [DynFlag]
1912 glasgowExtsFlags = [
1913 Opt_PrintExplicitForalls
1914 , Opt_ForeignFunctionInterface
1915 , Opt_UnliftedFFITypes
1917 , Opt_ImplicitParams
1918 , Opt_ScopedTypeVariables
1920 , Opt_TypeSynonymInstances
1921 , Opt_StandaloneDeriving
1922 , Opt_DeriveDataTypeable
1924 , Opt_DeriveFoldable
1925 , Opt_DeriveTraversable
1926 , Opt_FlexibleContexts
1927 , Opt_FlexibleInstances
1928 , Opt_ConstrainedClassMethods
1929 , Opt_MultiParamTypeClasses
1930 , Opt_FunctionalDependencies
1932 , Opt_PolymorphicComponents
1933 , Opt_ExistentialQuantification
1935 , Opt_PostfixOperators
1937 , Opt_LiberalTypeSynonyms
1941 , Opt_ParallelListComp
1942 , Opt_EmptyDataDecls
1943 , Opt_KindSignatures
1944 , Opt_GeneralizedNewtypeDeriving
1945 , Opt_TypeFamilies ]
1947 -- -----------------------------------------------------------------------------
1948 -- Parsing the dynamic flags.
1950 -- | Parse dynamic flags from a list of command line arguments. Returns the
1951 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1952 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1953 -- flags or missing arguments).
1954 parseDynamicFlags :: Monad m =>
1955 DynFlags -> [Located String]
1956 -> m (DynFlags, [Located String], [Located String])
1957 -- ^ Updated 'DynFlags', left-over arguments, and
1958 -- list of warnings.
1959 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1961 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1962 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1963 parseDynamicNoPackageFlags :: Monad m =>
1964 DynFlags -> [Located String]
1965 -> m (DynFlags, [Located String], [Located String])
1966 -- ^ Updated 'DynFlags', left-over arguments, and
1967 -- list of warnings.
1968 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1970 parseDynamicFlags_ :: Monad m =>
1971 DynFlags -> [Located String] -> Bool
1972 -> m (DynFlags, [Located String], [Located String])
1973 parseDynamicFlags_ dflags0 args pkg_flags = do
1974 -- XXX Legacy support code
1975 -- We used to accept things like
1976 -- optdep-f -optdepdepend
1977 -- optdep-f -optdep depend
1978 -- optdep -f -optdepdepend
1979 -- optdep -f -optdep depend
1980 -- but the spaces trip up proper argument handling. So get rid of them.
1981 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1982 f (x : xs) = x : f xs
1986 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1987 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1988 | otherwise = dynamic_flags
1990 let ((leftover, errs, warns), dflags1)
1991 = runCmdLine (processArgs flag_spec args') dflags0
1992 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1994 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1995 -- isn't up to the job. We know that if hscTarget == HscC, then the
1996 -- user has explicitly used -fvia-C, because -fasm is the default,
1997 -- unless there is no NCG on this platform. The latter case is
1998 -- checked when the -fPIC flag is parsed.
2000 let (pic_warns, dflags2) =
2001 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
2002 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
2003 dflags1{ hscTarget = HscAsm })
2006 return (dflags2, leftover, pic_warns ++ warns)
2008 type DynP = CmdLineP DynFlags
2010 upd :: (DynFlags -> DynFlags) -> DynP ()
2012 dfs <- getCmdLineState
2013 putCmdLineState $! (f dfs)
2015 --------------------------
2016 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
2017 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
2018 ; mapM_ setDynFlag deps }
2020 deps = [ d | (f', d) <- impliedFlags, f' == f ]
2021 -- When you set f, set the ones it implies
2022 -- NB: use setDynFlag recursively, in case the implied flags
2023 -- implies further flags
2024 -- When you un-set f, however, we don't un-set the things it implies
2025 -- (except for -fno-glasgow-exts, which is treated specially)
2027 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
2029 --------------------------
2030 setDumpFlag :: DynFlag -> OptKind DynP
2031 setDumpFlag dump_flag
2032 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
2034 -- Certain dumpy-things are really interested in what's going
2035 -- on during recompilation checking, so in those cases we
2036 -- don't want to turn it off.
2037 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
2038 Opt_D_dump_hi_diffs]
2040 forceRecompile :: DynP ()
2041 -- Whenver we -ddump, force recompilation (by switching off the
2042 -- recompilation checker), else you don't see the dump! However,
2043 -- don't switch it off in --make mode, else *everything* gets
2044 -- recompiled which probably isn't what you want
2045 forceRecompile = do { dfs <- getCmdLineState
2046 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2048 force_recomp dfs = isOneShot (ghcMode dfs)
2050 setVerboseCore2Core :: DynP ()
2051 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
2053 upd (\s -> s { shouldDumpSimplPhase = const True })
2055 setDumpSimplPhases :: String -> DynP ()
2056 setDumpSimplPhases s = do forceRecompile
2057 upd (\s -> s { shouldDumpSimplPhase = spec })
2059 spec :: SimplifierMode -> Bool
2061 . map (join (&&) . map match . split ':')
2067 join :: (Bool -> Bool -> Bool)
2068 -> [SimplifierMode -> Bool]
2069 -> SimplifierMode -> Bool
2070 join _ [] = const True
2071 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2073 match :: String -> SimplifierMode -> Bool
2074 match "" = const True
2075 match s = case reads s of
2076 [(n,"")] -> phase_num n
2079 phase_num :: Int -> SimplifierMode -> Bool
2080 phase_num n (SimplPhase k _) = n == k
2081 phase_num _ _ = False
2083 phase_name :: String -> SimplifierMode -> Bool
2084 phase_name s (SimplGently {}) = s == "gentle"
2085 phase_name s (SimplPhase { sm_names = ss }) = s `elem` ss
2087 setVerbosity :: Maybe Int -> DynP ()
2088 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2090 addCmdlineHCInclude :: String -> DynP ()
2091 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2093 extraPkgConf_ :: FilePath -> DynP ()
2094 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2096 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2098 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2100 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2102 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2104 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2106 setPackageName :: String -> DynFlags -> DynFlags
2107 setPackageName p s = s{ thisPackage = stringToPackageId p }
2109 -- If we're linking a binary, then only targets that produce object
2110 -- code are allowed (requests for other target types are ignored).
2111 setTarget :: HscTarget -> DynP ()
2112 setTarget l = upd set
2115 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2118 -- Changes the target only if we're compiling object code. This is
2119 -- used by -fasm and -fvia-C, which switch from one to the other, but
2120 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2121 -- can be safely used in an OPTIONS_GHC pragma.
2122 setObjTarget :: HscTarget -> DynP ()
2123 setObjTarget l = upd set
2126 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2129 setOptLevel :: Int -> DynFlags -> DynFlags
2130 setOptLevel n dflags
2131 | hscTarget dflags == HscInterpreted && n > 0
2133 -- not in IO any more, oh well:
2134 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2136 = updOptLevel n dflags
2139 -- -Odph is equivalent to
2141 -- -O2 optimise as much as possible
2142 -- -fno-method-sharing sharing specialisation defeats fusion
2144 -- -fdicts-cheap always inline dictionaries
2145 -- -fmax-simplifier-iterations20 this is necessary sometimes
2146 -- -fsimplifier-phases=3 we use an additional simplifier phase
2148 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2149 -- -fno-spec-constr-count SpecConstr as much as possible
2150 -- -finline-enough-args hack to prevent excessive inlining
2152 setDPHOpt :: DynFlags -> DynFlags
2153 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2155 , specConstrThreshold = Nothing
2156 , specConstrCount = Nothing
2158 `dopt_set` Opt_DictsCheap
2159 `dopt_unset` Opt_MethodSharing
2161 data DPHBackend = DPHPar
2164 deriving(Eq, Ord, Enum, Show)
2166 setDPHBackend :: DPHBackend -> DynP ()
2167 setDPHBackend backend
2169 upd $ \dflags -> dflags { dphBackend = backend }
2170 mapM_ exposePackage (dph_packages backend)
2172 dph_packages DPHThis = []
2173 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2174 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2176 dphPackage :: DynFlags -> PackageId
2177 dphPackage dflags = case dphBackend dflags of
2178 DPHPar -> dphParPackageId
2179 DPHSeq -> dphSeqPackageId
2180 DPHThis -> thisPackage dflags
2182 setMainIs :: String -> DynP ()
2184 | not (null main_fn) && isLower (head main_fn)
2185 -- The arg looked like "Foo.Bar.baz"
2186 = upd $ \d -> d{ mainFunIs = Just main_fn,
2187 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2189 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2190 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2192 | otherwise -- The arg looked like "baz"
2193 = upd $ \d -> d{ mainFunIs = Just arg }
2195 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2197 -----------------------------------------------------------------------------
2198 -- Paths & Libraries
2200 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2202 -- -i on its own deletes the import paths
2203 addImportPath "" = upd (\s -> s{importPaths = []})
2204 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2208 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2211 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2213 addFrameworkPath p =
2214 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2216 #ifndef mingw32_TARGET_OS
2217 split_marker :: Char
2218 split_marker = ':' -- not configurable (ToDo)
2221 splitPathList :: String -> [String]
2222 splitPathList s = filter notNull (splitUp s)
2223 -- empty paths are ignored: there might be a trailing
2224 -- ':' in the initial list, for example. Empty paths can
2225 -- cause confusion when they are translated into -I options
2226 -- for passing to gcc.
2228 #ifndef mingw32_TARGET_OS
2229 splitUp xs = split split_marker xs
2231 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2233 -- That is, if "foo:bar:baz" is used, this interpreted as
2234 -- consisting of three entries, 'foo', 'bar', 'baz'.
2235 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2236 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2238 -- Notice that no attempt is made to fully replace the 'standard'
2239 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2240 -- that this will cause too much breakage for users & ':' will
2241 -- work fine even with DOS paths, if you're not insisting on being silly.
2244 splitUp (x:':':div:xs) | div `elem` dir_markers
2245 = ((x:':':div:p): splitUp rs)
2247 (p,rs) = findNextPath xs
2248 -- we used to check for existence of the path here, but that
2249 -- required the IO monad to be threaded through the command-line
2250 -- parser which is quite inconvenient. The
2251 splitUp xs = cons p (splitUp rs)
2253 (p,rs) = findNextPath xs
2258 -- will be called either when we've consumed nought or the
2259 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2260 -- finding the next split marker.
2262 case break (`elem` split_markers) xs of
2263 (p, _:ds) -> (p, ds)
2266 split_markers :: [Char]
2267 split_markers = [':', ';']
2269 dir_markers :: [Char]
2270 dir_markers = ['/', '\\']
2273 -- -----------------------------------------------------------------------------
2274 -- tmpDir, where we store temporary files.
2276 setTmpDir :: FilePath -> DynFlags -> DynFlags
2277 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2278 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2279 -- seem necessary now --SDM 7/2/2008
2281 -----------------------------------------------------------------------------
2284 setOptHpcDir :: String -> DynP ()
2285 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2287 -----------------------------------------------------------------------------
2288 -- Via-C compilation stuff
2290 -- There are some options that we need to pass to gcc when compiling
2291 -- Haskell code via C, but are only supported by recent versions of
2292 -- gcc. The configure script decides which of these options we need,
2293 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2294 -- read before each via-C compilation. The advantage of having these
2295 -- in a separate file is that the file can be created at install-time
2296 -- depending on the available gcc version, and even re-generated later
2297 -- if gcc is upgraded.
2299 -- The options below are not dependent on the version of gcc, only the
2302 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2303 [String]) -- for registerised HC compilations
2304 machdepCCOpts _dflags
2305 #if alpha_TARGET_ARCH
2307 #ifdef HAVE_THREADED_RTS_SUPPORT
2311 -- For now, to suppress the gcc warning "call-clobbered
2312 -- register used for global register variable", we simply
2313 -- disable all warnings altogether using the -w flag. Oh well.
2315 #elif hppa_TARGET_ARCH
2316 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2317 -- (very nice, but too bad the HP /usr/include files don't agree.)
2318 = ( ["-D_HPUX_SOURCE"], [] )
2320 #elif m68k_TARGET_ARCH
2321 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2322 -- popping of args to routines to be explicit; if we let things
2323 -- be deferred 'til after an STGJUMP, imminent death is certain!
2325 -- -fomit-frame-pointer : *don't*
2326 -- It's better to have a6 completely tied up being a frame pointer
2327 -- rather than let GCC pick random things to do with it.
2328 -- (If we want to steal a6, then we would try to do things
2329 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2330 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2332 #elif i386_TARGET_ARCH
2333 -- -fno-defer-pop : basically the same game as for m68k
2335 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2336 -- the fp (%ebp) for our register maps.
2337 = let n_regs = stolen_x86_regs _dflags
2340 #if darwin_TARGET_OS
2341 -- By default, gcc on OS X will generate SSE
2342 -- instructions, which need things 16-byte aligned,
2343 -- but we don't 16-byte align things. Thus drop
2344 -- back to generic i686 compatibility. Trac #2983.
2346 -- Since Snow Leopard (10.6), gcc defaults to x86_64.
2347 ["-march=i686", "-m32"],
2349 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2353 "-fomit-frame-pointer",
2354 -- we want -fno-builtin, because when gcc inlines
2355 -- built-in functions like memcpy() it tends to
2356 -- run out of registers, requiring -monly-n-regs
2358 "-DSTOLEN_X86_REGS="++show n_regs ]
2361 #elif ia64_TARGET_ARCH
2362 = ( [], ["-fomit-frame-pointer", "-G0"] )
2364 #elif x86_64_TARGET_ARCH
2366 #if darwin_TARGET_OS
2371 ["-fomit-frame-pointer",
2372 "-fno-asynchronous-unwind-tables",
2373 -- the unwind tables are unnecessary for HC code,
2374 -- and get in the way of -split-objs. Another option
2375 -- would be to throw them away in the mangler, but this
2378 -- calling builtins like strlen() using the FFI can
2379 -- cause gcc to run out of regs, so use the external
2383 #elif sparc_TARGET_ARCH
2385 -- For now, to suppress the gcc warning "call-clobbered
2386 -- register used for global register variable", we simply
2387 -- disable all warnings altogether using the -w flag. Oh well.
2389 #elif powerpc_apple_darwin_TARGET
2391 -- Disable Apple's precompiling preprocessor. It's a great thing
2392 -- for "normal" programs, but it doesn't support register variable
2394 = ( [], ["-no-cpp-precomp"] )
2399 picCCOpts :: DynFlags -> [String]
2401 #if darwin_TARGET_OS
2402 -- Apple prefers to do things the other way round.
2403 -- PIC is on by default.
2404 -- -mdynamic-no-pic:
2405 -- Turn off PIC code generation.
2407 -- Don't generate "common" symbols - these are unwanted
2408 -- in dynamic libraries.
2411 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2413 = ["-mdynamic-no-pic"]
2414 #elif mingw32_TARGET_OS
2415 -- no -fPIC for Windows
2417 = ["-U __PIC__","-D__PIC__"]
2421 | opt_PIC || not opt_Static
2422 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2427 -- -----------------------------------------------------------------------------
2431 can_split = cSplitObjs == "YES"
2433 -- -----------------------------------------------------------------------------
2436 data Printable = String String
2437 | FromDynFlags (DynFlags -> String)
2439 compilerInfo :: [(String, Printable)]
2440 compilerInfo = [("Project name", String cProjectName),
2441 ("Project version", String cProjectVersion),
2442 ("Booter version", String cBooterVersion),
2443 ("Stage", String cStage),
2444 ("Have interpreter", String cGhcWithInterpreter),
2445 ("Object splitting", String cSplitObjs),
2446 ("Have native code generator", String cGhcWithNativeCodeGen),
2447 ("Support SMP", String cGhcWithSMP),
2448 ("Unregisterised", String cGhcUnregisterised),
2449 ("Tables next to code", String cGhcEnableTablesNextToCode),
2450 ("Win32 DLLs", String cEnableWin32DLLs),
2451 ("RTS ways", String cGhcRTSWays),
2452 ("Leading underscore", String cLeadingUnderscore),
2453 ("Debug on", String (show debugIsOn)),
2454 ("LibDir", FromDynFlags topDir)