6 -- (c) The University of Glasgow 2005
9 -- Most flags are dynamic flags, which means they can change from
10 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
11 -- multi-session GHC each session can be using different dynamic
12 -- flags. Dynamic flags can also be set at the prompt in GHCi.
14 -- * Dynamic flags and associated configuration types
17 HscTarget(..), isObjectTarget, defaultObjectTarget,
18 GhcMode(..), isOneShot,
19 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
64 #include "HsVersions.h"
66 #ifndef OMIT_NATIVE_CODEGEN
71 import PrelNames ( mAIN )
72 #if defined(i386_TARGET_ARCH) || (!defined(mingw32_TARGET_OS) && !defined(darwin_TARGET_OS))
73 import StaticFlags ( opt_Static )
75 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
77 import {-# SOURCE #-} Packages (PackageState)
78 import DriverPhases ( Phase(..), phaseInputExt )
81 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
83 import UniqFM ( UniqFM )
85 import Maybes ( orElse )
90 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
93 import Control.Monad ( when )
96 import Data.List ( intersperse )
97 import System.FilePath
98 import System.IO ( stderr, hPutChar )
100 -- -----------------------------------------------------------------------------
103 -- | Enumerates the simple on-or-off dynamic flags
109 | Opt_D_dump_cmmz_pretty
113 | Opt_D_dump_asm_native
114 | Opt_D_dump_asm_liveness
115 | Opt_D_dump_asm_coalesce
116 | Opt_D_dump_asm_regalloc
117 | Opt_D_dump_asm_regalloc_stages
118 | Opt_D_dump_asm_conflicts
119 | Opt_D_dump_asm_stats
120 | Opt_D_dump_asm_expanded
126 | Opt_D_dump_inlinings
127 | Opt_D_dump_rule_firings
128 | Opt_D_dump_occur_anal
132 | Opt_D_dump_simpl_iterations
133 | Opt_D_dump_simpl_phases
142 | Opt_D_dump_worker_wrapper
143 | Opt_D_dump_rn_trace
144 | Opt_D_dump_rn_stats
146 | Opt_D_dump_simpl_stats
147 | Opt_D_dump_tc_trace
148 | Opt_D_dump_if_trace
155 | Opt_D_verbose_core2core
156 | Opt_D_verbose_stg2stg
158 | Opt_D_dump_hi_diffs
159 | Opt_D_dump_minimal_imports
160 | Opt_D_dump_mod_cycles
161 | Opt_D_dump_view_pattern_commoning
162 | Opt_D_faststring_stats
163 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
164 | Opt_D_no_debug_output
170 | Opt_WarnIsError -- -Werror; makes warnings fatal
171 | Opt_WarnDuplicateExports
173 | Opt_WarnImplicitPrelude
174 | Opt_WarnIncompletePatterns
175 | Opt_WarnIncompletePatternsRecUpd
176 | Opt_WarnMissingFields
177 | Opt_WarnMissingMethods
178 | Opt_WarnMissingSigs
179 | Opt_WarnNameShadowing
180 | Opt_WarnOverlappingPatterns
181 | Opt_WarnSimplePatterns
182 | Opt_WarnTypeDefaults
183 | Opt_WarnMonomorphism
184 | Opt_WarnUnusedBinds
185 | Opt_WarnUnusedImports
186 | Opt_WarnUnusedMatches
187 | Opt_WarnWarningsDeprecations
188 | Opt_WarnDeprecatedFlags
189 | Opt_WarnDodgyImports
192 | Opt_WarnUnrecognisedPragmas
193 | Opt_WarnDodgyForeignImports
194 | Opt_WarnLazyUnliftedBindings
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_PArr -- Syntactic support for parallel arrays
207 | Opt_Arrows -- Arrow-notation syntax
208 | Opt_TemplateHaskell
211 | Opt_Generics -- "Derivable type classes"
212 | Opt_ImplicitPrelude
213 | Opt_ScopedTypeVariables
217 | Opt_OverloadedStrings
218 | Opt_DisambiguateRecordFields
219 | Opt_RecordWildCards
225 | Opt_StandaloneDeriving
226 | Opt_DeriveDataTypeable
228 | Opt_DeriveTraversable
231 | Opt_TypeSynonymInstances
232 | Opt_FlexibleContexts
233 | Opt_FlexibleInstances
234 | Opt_ConstrainedClassMethods
235 | Opt_MultiParamTypeClasses
236 | Opt_FunctionalDependencies
238 | Opt_PolymorphicComponents
239 | Opt_ExistentialQuantification
243 | Opt_ParallelListComp
244 | Opt_TransformListComp
245 | Opt_GeneralizedNewtypeDeriving
247 | Opt_PostfixOperators
249 | Opt_LiberalTypeSynonyms
252 | Opt_ImpredicativeTypes
255 | Opt_NewQualifiedOperators
257 | Opt_PrintExplicitForalls
262 | Opt_StaticArgumentTransformation
266 | Opt_IgnoreInterfacePragmas
267 | Opt_OmitInterfacePragmas
268 | Opt_DoLambdaEtaExpansion
272 | Opt_UnboxStrictFields
275 | Opt_InlineIfEnoughArgs
276 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
278 | Opt_RegsGraph -- do graph coloring register allocation
279 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
282 | Opt_AutoSccsOnAllToplevs
283 | Opt_AutoSccsOnExportedToplevs
284 | Opt_AutoSccsOnIndividualCafs
292 | Opt_ExcessPrecision
293 | Opt_EagerBlackHoling
294 | Opt_ReadUserPackageConf
298 | Opt_HideAllPackages
299 | Opt_PrintBindResult
303 | Opt_BreakOnException
305 | Opt_PrintEvldWithShow
306 | Opt_PrintBindContents
313 | Opt_ConvertToZipCfgAndBack
314 | Opt_AutoLinkPackages
315 | Opt_ImplicitImportQualified
324 | Opt_KeepRawTokenStream
328 -- | Contains not only a collection of 'DynFlag's but also a plethora of
329 -- information relating to the compilation of a single file or GHC session
330 data DynFlags = DynFlags {
333 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
334 stgToDo :: Maybe [StgToDo], -- similarly
335 hscTarget :: HscTarget,
336 hscOutName :: String, -- ^ Name of the output file
337 extCoreName :: String, -- ^ Name of the .hcr output file
338 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
339 optLevel :: Int, -- ^ Optimisation level
340 simplPhases :: Int, -- ^ Number of simplifier phases
341 maxSimplIterations :: Int, -- ^ Max simplifier iterations
342 shouldDumpSimplPhase :: SimplifierMode -> Bool,
343 ruleCheck :: Maybe String,
345 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
346 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
347 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
349 #ifndef OMIT_NATIVE_CODEGEN
350 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
352 stolen_x86_regs :: Int,
353 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
354 importPaths :: [FilePath],
356 mainFunIs :: Maybe String,
357 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
359 dphBackend :: DPHBackend,
361 thisPackage :: PackageId, -- ^ name of package currently being compiled
364 wayNames :: [WayName], -- ^ Way flags from the command line
365 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
366 rtsBuildTag :: String, -- ^ The RTS \"way\"
368 -- For object splitting
369 splitInfo :: Maybe (String,Int),
372 objectDir :: Maybe String,
373 hiDir :: Maybe String,
374 stubDir :: Maybe String,
380 outputFile :: Maybe String,
381 outputHi :: Maybe String,
382 dynLibLoader :: DynLibLoader,
384 -- | This is set by 'DriverPipeline.runPipeline' based on where
385 -- its output is going.
386 dumpPrefix :: Maybe FilePath,
388 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
389 -- Set by @-ddump-file-prefix@
390 dumpPrefixForce :: Maybe FilePath,
392 includePaths :: [String],
393 libraryPaths :: [String],
394 frameworkPaths :: [String], -- used on darwin only
395 cmdlineFrameworks :: [String], -- ditto
396 tmpDir :: String, -- no trailing '/'
398 ghcUsagePath :: FilePath, -- Filled in by SysTools
399 ghciUsagePath :: FilePath, -- ditto
401 hpcDir :: String, -- ^ Path to store the .mix files
403 -- options for particular phases
411 opt_windres :: [String],
413 -- commands for particular phases
415 pgm_P :: (String,[Option]),
417 pgm_c :: (String,[Option]),
418 pgm_m :: (String,[Option]),
419 pgm_s :: (String,[Option]),
420 pgm_a :: (String,[Option]),
421 pgm_l :: (String,[Option]),
422 pgm_dll :: (String,[Option]),
424 pgm_sysman :: String,
425 pgm_windres :: String,
428 depMakefile :: FilePath,
429 depIncludePkgDeps :: Bool,
430 depExcludeMods :: [ModuleName],
431 depSuffixes :: [String],
434 extraPkgConfs :: [FilePath],
435 topDir :: FilePath, -- filled in by SysTools
436 systemPackageConfig :: FilePath, -- ditto
437 -- ^ The @-package-conf@ flags given on the command line, in the order
440 packageFlags :: [PackageFlag],
441 -- ^ The @-package@ and @-hide-package@ flags from the command-line
444 -- NB. do not modify this field, it is calculated by
445 -- Packages.initPackages and Packages.updatePackages.
446 pkgDatabase :: Maybe (UniqFM PackageConfig),
447 pkgState :: PackageState,
450 -- These have to be IORefs, because the defaultCleanupHandler needs to
451 -- know what to clean when an exception happens
452 filesToClean :: IORef [FilePath],
453 dirsToClean :: IORef (FiniteMap FilePath FilePath),
458 -- | Message output action: use "ErrUtils" instead of this if you can
459 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
461 haddockOptions :: Maybe String
464 -- | The target code type of the compilation (if any).
466 -- Whenever you change the target, also make sure to set 'ghcLink' to
467 -- something sensible.
469 -- 'HscNothing' can be used to avoid generating any output, however, note
472 -- * This will not run the desugaring step, thus no warnings generated in
473 -- this step will be output. In particular, this includes warnings related
474 -- to pattern matching. You can run the desugarer manually using
475 -- 'GHC.desugarModule'.
477 -- * If a program uses Template Haskell the typechecker may try to run code
478 -- from an imported module. This will fail if no code has been generated
479 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
480 -- whether this might be the case and choose to either switch to a
481 -- different target or avoid typechecking such modules. (The latter may
482 -- preferable for security reasons.)
485 = HscC -- ^ Generate C code.
486 | HscAsm -- ^ Generate assembly using the native code generator.
487 | HscJava -- ^ Generate Java bytecode.
488 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
489 | HscNothing -- ^ Don't generate any code. See notes above.
492 -- | Will this target result in an object file on the disk?
493 isObjectTarget :: HscTarget -> Bool
494 isObjectTarget HscC = True
495 isObjectTarget HscAsm = True
496 isObjectTarget _ = False
498 -- | The 'GhcMode' tells us whether we're doing multi-module
499 -- compilation (controlled via the "GHC" API) or one-shot
500 -- (single-module) compilation. This makes a difference primarily to
501 -- the "Finder": in one-shot mode we look for interface files for
502 -- imported modules, but in multi-module mode we look for source files
503 -- in order to check whether they need to be recompiled.
505 = CompManager -- ^ @\-\-make@, GHCi, etc.
506 | OneShot -- ^ @ghc -c Foo.hs@
507 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
510 instance Outputable GhcMode where
511 ppr CompManager = ptext (sLit "CompManager")
512 ppr OneShot = ptext (sLit "OneShot")
513 ppr MkDepend = ptext (sLit "MkDepend")
515 isOneShot :: GhcMode -> Bool
516 isOneShot OneShot = True
517 isOneShot _other = False
519 -- | What to do in the link step, if there is one.
521 = NoLink -- ^ Don't link at all
522 | LinkBinary -- ^ Link object code into a binary
523 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
524 -- bytecode and object code).
525 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
528 isNoLink :: GhcLink -> Bool
529 isNoLink NoLink = True
532 -- Is it worth evaluating this Bool and caching it in the DynFlags value
533 -- during initDynFlags?
534 doingTickyProfiling :: DynFlags -> Bool
535 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
538 = ExposePackage String
540 | IgnorePackage String
543 defaultHscTarget :: HscTarget
544 defaultHscTarget = defaultObjectTarget
546 -- | The 'HscTarget' value corresponding to the default way to create
547 -- object files on the current platform.
548 defaultObjectTarget :: HscTarget
550 | cGhcWithNativeCodeGen == "YES" = HscAsm
555 | Wrapped (Maybe String)
559 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
560 initDynFlags :: DynFlags -> IO DynFlags
561 initDynFlags dflags = do
562 -- someday these will be dynamic flags
563 ways <- readIORef v_Ways
564 build_tag <- readIORef v_Build_tag
565 rts_build_tag <- readIORef v_RTS_Build_tag
566 refFilesToClean <- newIORef []
567 refDirsToClean <- newIORef emptyFM
570 buildTag = build_tag,
571 rtsBuildTag = rts_build_tag,
572 filesToClean = refFilesToClean,
573 dirsToClean = refDirsToClean
576 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
577 -- and must be fully initialized by 'GHC.newSession' first.
578 defaultDynFlags :: DynFlags
581 ghcMode = CompManager,
582 ghcLink = LinkBinary,
585 hscTarget = defaultHscTarget,
591 maxSimplIterations = 4,
592 shouldDumpSimplPhase = const False,
594 specConstrThreshold = Just 200,
595 specConstrCount = Just 3,
596 liberateCaseThreshold = Just 200,
597 #ifndef OMIT_NATIVE_CODEGEN
598 targetPlatform = defaultTargetPlatform,
601 cmdlineHcIncludes = [],
605 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
609 thisPackage = mainPackageId,
615 objectSuf = phaseInputExt StopLn,
616 hcSuf = phaseInputExt HCc,
619 outputFile = Nothing,
621 dynLibLoader = SystemDependent,
622 dumpPrefix = Nothing,
623 dumpPrefixForce = Nothing,
627 cmdlineFrameworks = [],
628 tmpDir = cDEFAULT_TMPDIR,
634 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
645 pkgDatabase = Nothing,
646 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
647 wayNames = panic "defaultDynFlags: No wayNames",
648 buildTag = panic "defaultDynFlags: No buildTag",
649 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
651 -- initSysTools fills all these in
652 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
653 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
654 topDir = panic "defaultDynFlags: No topDir",
655 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
656 pgm_L = panic "defaultDynFlags: No pgm_L",
657 pgm_P = panic "defaultDynFlags: No pgm_P",
658 pgm_F = panic "defaultDynFlags: No pgm_F",
659 pgm_c = panic "defaultDynFlags: No pgm_c",
660 pgm_m = panic "defaultDynFlags: No pgm_m",
661 pgm_s = panic "defaultDynFlags: No pgm_s",
662 pgm_a = panic "defaultDynFlags: No pgm_a",
663 pgm_l = panic "defaultDynFlags: No pgm_l",
664 pgm_dll = panic "defaultDynFlags: No pgm_dll",
665 pgm_T = panic "defaultDynFlags: No pgm_T",
666 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
667 pgm_windres = panic "defaultDynFlags: No pgm_windres",
668 -- end of initSysTools values
670 depMakefile = "Makefile",
671 depIncludePkgDeps = False,
674 -- end of ghc -M values
675 filesToClean = panic "defaultDynFlags: No filesToClean",
676 dirsToClean = panic "defaultDynFlags: No dirsToClean",
677 haddockOptions = Nothing,
679 Opt_AutoLinkPackages,
680 Opt_ReadUserPackageConf,
682 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
683 -- behaviour the default, to see if anyone notices
687 Opt_MonomorphismRestriction,
695 Opt_PrintBindContents
697 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
698 -- The default -O0 options
701 log_action = \severity srcSpan style msg ->
703 SevInfo -> printErrs (msg style)
704 SevFatal -> printErrs (msg style)
707 printErrs ((mkLocMessage srcSpan msg) style)
708 -- careful (#2302): printErrs prints in UTF-8, whereas
709 -- converting to string first and using hPutStr would
710 -- just emit the low 8 bits of each unicode char.
717 0 | print errors & warnings only
718 1 | minimal verbosity: print "compiling M ... done." for each module.
719 2 | equivalent to -dshow-passes
720 3 | equivalent to existing "ghc -v"
721 4 | "ghc -v -ddump-most"
722 5 | "ghc -v -ddump-all"
725 -- | Test whether a 'DynFlag' is set
726 dopt :: DynFlag -> DynFlags -> Bool
727 dopt f dflags = f `elem` (flags dflags)
730 dopt_set :: DynFlags -> DynFlag -> DynFlags
731 dopt_set dfs f = dfs{ flags = f : flags dfs }
733 -- | Unset a 'DynFlag'
734 dopt_unset :: DynFlags -> DynFlag -> DynFlags
735 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
737 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
738 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
739 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
740 -> [a] -- ^ Correctly ordered extracted options
741 getOpts dflags opts = reverse (opts dflags)
742 -- We add to the options from the front, so we need to reverse the list
744 -- | Gets the verbosity flag for the current verbosity level. This is fed to
745 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
746 getVerbFlag :: DynFlags -> String
748 | verbosity dflags >= 3 = "-v"
751 setObjectDir, setHiDir, setStubDir, setOutputDir,
752 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
753 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
754 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
755 addCmdlineFramework, addHaddockOpts
756 :: String -> DynFlags -> DynFlags
757 setOutputFile, setOutputHi, setDumpPrefixForce
758 :: Maybe String -> DynFlags -> DynFlags
760 setObjectDir f d = d{ objectDir = Just f}
761 setHiDir f d = d{ hiDir = Just f}
762 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
763 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
764 -- \#included from the .hc file when compiling with -fvia-C.
765 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
767 setObjectSuf f d = d{ objectSuf = f}
768 setHiSuf f d = d{ hiSuf = f}
769 setHcSuf f d = d{ hcSuf = f}
771 setOutputFile f d = d{ outputFile = f}
772 setOutputHi f d = d{ outputHi = f}
774 parseDynLibLoaderMode f d =
776 ("deploy", "") -> d{ dynLibLoader = Deployable }
777 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
778 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
779 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
780 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
781 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
783 setDumpPrefixForce f d = d { dumpPrefixForce = f}
785 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
786 -- Config.hs should really use Option.
787 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
789 setPgmL f d = d{ pgm_L = f}
790 setPgmF f d = d{ pgm_F = f}
791 setPgmc f d = d{ pgm_c = (f,[])}
792 setPgmm f d = d{ pgm_m = (f,[])}
793 setPgms f d = d{ pgm_s = (f,[])}
794 setPgma f d = d{ pgm_a = (f,[])}
795 setPgml f d = d{ pgm_l = (f,[])}
796 setPgmdll f d = d{ pgm_dll = (f,[])}
797 setPgmwindres f d = d{ pgm_windres = f}
799 addOptL f d = d{ opt_L = f : opt_L d}
800 addOptP f d = d{ opt_P = f : opt_P d}
801 addOptF f d = d{ opt_F = f : opt_F d}
802 addOptc f d = d{ opt_c = f : opt_c d}
803 addOptm f d = d{ opt_m = f : opt_m d}
804 addOpta f d = d{ opt_a = f : opt_a d}
805 addOptl f d = d{ opt_l = f : opt_l d}
806 addOptwindres f d = d{ opt_windres = f : opt_windres d}
808 setDepMakefile :: FilePath -> DynFlags -> DynFlags
809 setDepMakefile f d = d { depMakefile = deOptDep f }
811 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
812 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
814 addDepExcludeMod :: String -> DynFlags -> DynFlags
816 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
818 addDepSuffix :: FilePath -> DynFlags -> DynFlags
819 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
822 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
823 -- we need to strip the "-optdep" off of the arg
824 deOptDep :: String -> String
825 deOptDep x = case maybePrefixMatch "-optdep" x of
829 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
831 addHaddockOpts f d = d{ haddockOptions = Just f}
833 -- -----------------------------------------------------------------------------
834 -- Command-line options
836 -- | When invoking external tools as part of the compilation pipeline, we
837 -- pass these a sequence of options on the command-line. Rather than
838 -- just using a list of Strings, we use a type that allows us to distinguish
839 -- between filepaths and 'other stuff'. The reason for this is that
840 -- this type gives us a handle on transforming filenames, and filenames only,
841 -- to whatever format they're expected to be on a particular platform.
843 = FileOption -- an entry that _contains_ filename(s) / filepaths.
844 String -- a non-filepath prefix that shouldn't be
845 -- transformed (e.g., "/out=")
846 String -- the filepath/filename portion
849 -----------------------------------------------------------------------------
850 -- Setting the optimisation level
852 updOptLevel :: Int -> DynFlags -> DynFlags
853 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
855 = dfs2{ optLevel = final_n }
857 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
858 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
859 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
861 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
862 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
864 optLevelFlags :: [([Int], DynFlag)]
866 = [ ([0], Opt_IgnoreInterfacePragmas)
867 , ([0], Opt_OmitInterfacePragmas)
869 , ([1,2], Opt_IgnoreAsserts)
870 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
872 , ([1,2], Opt_DoEtaReduction)
873 , ([1,2], Opt_CaseMerge)
874 , ([1,2], Opt_Strictness)
876 , ([1,2], Opt_FullLaziness)
878 , ([2], Opt_LiberateCase)
879 , ([2], Opt_SpecConstr)
881 -- , ([2], Opt_StaticArgumentTransformation)
882 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
883 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
884 -- several improvements to the heuristics, and I'm concerned that without
885 -- those changes SAT will interfere with some attempts to write "high
886 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
887 -- this year. In particular, the version in HEAD lacks the tail call
888 -- criterion, so many things that look like reasonable loops will be
889 -- turned into functions with extra (unneccesary) thunk creation.
891 , ([0,1,2], Opt_DoLambdaEtaExpansion)
892 -- This one is important for a tiresome reason:
893 -- we want to make sure that the bindings for data
894 -- constructors are eta-expanded. This is probably
895 -- a good thing anyway, but it seems fragile.
898 -- -----------------------------------------------------------------------------
899 -- Standard sets of warning options
901 standardWarnings :: [DynFlag]
903 = [ Opt_WarnWarningsDeprecations,
904 Opt_WarnDeprecatedFlags,
905 Opt_WarnUnrecognisedPragmas,
906 Opt_WarnOverlappingPatterns,
907 Opt_WarnMissingFields,
908 Opt_WarnMissingMethods,
909 Opt_WarnDuplicateExports,
910 Opt_WarnLazyUnliftedBindings,
911 Opt_WarnDodgyForeignImports
914 minusWOpts :: [DynFlag]
916 = standardWarnings ++
917 [ Opt_WarnUnusedBinds,
918 Opt_WarnUnusedMatches,
919 Opt_WarnUnusedImports,
920 Opt_WarnIncompletePatterns,
924 minusWallOpts :: [DynFlag]
927 [ Opt_WarnTypeDefaults,
928 Opt_WarnNameShadowing,
934 -- minuswRemovesOpts should be every warning option
935 minuswRemovesOpts :: [DynFlag]
938 [Opt_WarnImplicitPrelude,
939 Opt_WarnIncompletePatternsRecUpd,
940 Opt_WarnSimplePatterns,
941 Opt_WarnMonomorphism,
942 Opt_WarnUnrecognisedPragmas,
946 -- -----------------------------------------------------------------------------
947 -- CoreToDo: abstraction of core-to-core passes to run.
949 data CoreToDo -- These are diff core-to-core passes,
950 -- which may be invoked in any order,
951 -- as many times as you like.
953 = CoreDoSimplify -- The core-to-core simplifier.
956 -- Each run of the simplifier can take a different
957 -- set of simplifier-specific flags.
959 | CoreDoFloatOutwards FloatOutSwitches
964 | CoreDoWorkerWrapper
967 | CoreDoOldStrictness
970 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
971 -- matching this string
972 | CoreDoVectorisation PackageId
973 | CoreDoNothing -- Useful when building up
974 | CoreDoPasses [CoreToDo] -- lists of these things
977 data SimplifierMode -- See comments in SimplMonad
979 | SimplPhase Int [String]
981 instance Outputable SimplifierMode where
982 ppr SimplGently = ptext (sLit "gentle")
983 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
986 data SimplifierSwitch
987 = MaxSimplifierIterations Int
991 data FloatOutSwitches = FloatOutSwitches {
992 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
993 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
994 -- even if they do not escape a lambda
997 instance Outputable FloatOutSwitches where
998 ppr = pprFloatOutSwitches
1000 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1001 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1002 <+> pp_not (floatOutConstants sw) <+> text "constants"
1005 pp_not False = text "not"
1007 -- | Switches that specify the minimum amount of floating out
1008 -- gentleFloatOutSwitches :: FloatOutSwitches
1009 -- gentleFloatOutSwitches = FloatOutSwitches False False
1011 -- | Switches that do not specify floating out of lambdas, just of constants
1012 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1013 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1016 -- The core-to-core pass ordering is derived from the DynFlags:
1017 runWhen :: Bool -> CoreToDo -> CoreToDo
1018 runWhen True do_this = do_this
1019 runWhen False _ = CoreDoNothing
1021 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1022 runMaybe (Just x) f = f x
1023 runMaybe Nothing _ = CoreDoNothing
1025 getCoreToDo :: DynFlags -> [CoreToDo]
1027 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1028 | otherwise = core_todo
1030 opt_level = optLevel dflags
1031 phases = simplPhases dflags
1032 max_iter = maxSimplIterations dflags
1033 strictness = dopt Opt_Strictness dflags
1034 full_laziness = dopt Opt_FullLaziness dflags
1035 cse = dopt Opt_CSE dflags
1036 spec_constr = dopt Opt_SpecConstr dflags
1037 liberate_case = dopt Opt_LiberateCase dflags
1038 rule_check = ruleCheck dflags
1039 static_args = dopt Opt_StaticArgumentTransformation dflags
1041 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1043 simpl_phase phase names iter
1045 [ CoreDoSimplify (SimplPhase phase names) [
1046 MaxSimplifierIterations iter
1048 maybe_rule_check phase
1052 = runWhen (dopt Opt_Vectorise dflags)
1053 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1056 -- By default, we have 2 phases before phase 0.
1058 -- Want to run with inline phase 2 after the specialiser to give
1059 -- maximum chance for fusion to work before we inline build/augment
1060 -- in phase 1. This made a difference in 'ansi' where an
1061 -- overloaded function wasn't inlined till too late.
1063 -- Need phase 1 so that build/augment get
1064 -- inlined. I found that spectral/hartel/genfft lost some useful
1065 -- strictness in the function sumcode' if augment is not inlined
1066 -- before strictness analysis runs
1067 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1068 | phase <- [phases, phases-1 .. 1] ]
1071 -- initial simplify: mk specialiser happy: minimum effort please
1072 simpl_gently = CoreDoSimplify SimplGently [
1073 -- Simplify "gently"
1074 -- Don't inline anything till full laziness has bitten
1075 -- In particular, inlining wrappers inhibits floating
1076 -- e.g. ...(case f x of ...)...
1077 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1078 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1079 -- and now the redex (f x) isn't floatable any more
1080 -- Similarly, don't apply any rules until after full
1081 -- laziness. Notably, list fusion can prevent floating.
1083 NoCaseOfCase, -- Don't do case-of-case transformations.
1084 -- This makes full laziness work better
1085 MaxSimplifierIterations max_iter
1089 if opt_level == 0 then
1091 simpl_phase 0 ["final"] max_iter]
1092 else {- opt_level >= 1 -} [
1094 -- We want to do the static argument transform before full laziness as it
1095 -- may expose extra opportunities to float things outwards. However, to fix
1096 -- up the output of the transformation we need at do at least one simplify
1097 -- after this before anything else
1098 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1100 -- We run vectorisation here for now, but we might also try to run
1104 -- initial simplify: mk specialiser happy: minimum effort please
1107 -- Specialisation is best done before full laziness
1108 -- so that overloaded functions have all their dictionary lambdas manifest
1111 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1112 -- Was: gentleFloatOutSwitches
1113 -- I have no idea why, but not floating constants to top level is
1114 -- very bad in some cases.
1115 -- Notably: p_ident in spectral/rewrite
1116 -- Changing from "gentle" to "constantsOnly" improved
1117 -- rewrite's allocation by 19%, and made 0.0% difference
1118 -- to any other nofib benchmark
1124 -- Phase 0: allow all Ids to be inlined now
1125 -- This gets foldr inlined before strictness analysis
1127 -- At least 3 iterations because otherwise we land up with
1128 -- huge dead expressions because of an infelicity in the
1130 -- let k = BIG in foldr k z xs
1131 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1132 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1134 simpl_phase 0 ["main"] (max max_iter 3),
1137 #ifdef OLD_STRICTNESS
1138 CoreDoOldStrictness,
1140 runWhen strictness (CoreDoPasses [
1142 CoreDoWorkerWrapper,
1144 simpl_phase 0 ["post-worker-wrapper"] max_iter
1147 runWhen full_laziness
1148 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1149 -- nofib/spectral/hartel/wang doubles in speed if you
1150 -- do full laziness late in the day. It only happens
1151 -- after fusion and other stuff, so the early pass doesn't
1152 -- catch it. For the record, the redex is
1153 -- f_el22 (f_el21 r_midblock)
1156 runWhen cse CoreCSE,
1157 -- We want CSE to follow the final full-laziness pass, because it may
1158 -- succeed in commoning up things floated out by full laziness.
1159 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1165 -- Case-liberation for -O2. This should be after
1166 -- strictness analysis and the simplification which follows it.
1167 runWhen liberate_case (CoreDoPasses [
1169 simpl_phase 0 ["post-liberate-case"] max_iter
1170 ]), -- Run the simplifier after LiberateCase to vastly
1171 -- reduce the possiblility of shadowing
1172 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1174 runWhen spec_constr CoreDoSpecConstr,
1178 -- Final clean-up simplification:
1179 simpl_phase 0 ["final"] max_iter
1182 -- -----------------------------------------------------------------------------
1183 -- StgToDo: abstraction of stg-to-stg passes to run.
1186 = StgDoMassageForProfiling -- should be (next to) last
1187 -- There's also setStgVarInfo, but its absolute "lastness"
1188 -- is so critical that it is hardwired in (no flag).
1191 getStgToDo :: DynFlags -> [StgToDo]
1193 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1196 stg_stats = dopt Opt_StgStats dflags
1198 todo1 = if stg_stats then [D_stg_stats] else []
1200 todo2 | WayProf `elem` wayNames dflags
1201 = StgDoMassageForProfiling : todo1
1205 -- -----------------------------------------------------------------------------
1208 allFlags :: [String]
1209 allFlags = map ('-':) $
1210 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1211 map ("fno-"++) flags ++
1212 map ("f"++) flags ++
1213 map ("X"++) supportedLanguages ++
1214 map ("XNo"++) supportedLanguages
1215 where ok (PrefixPred _ _) = False
1217 flags = [ name | (name, _, _) <- fFlags ]
1219 dynamic_flags :: [Flag DynP]
1221 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1222 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1223 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1224 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1225 , Flag "v" (OptIntSuffix setVerbosity) Supported
1227 ------- Specific phases --------------------------------------------
1228 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1229 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1230 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1231 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1232 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1233 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1234 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1235 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1236 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1237 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1239 , Flag "optL" (HasArg (upd . addOptL)) Supported
1240 , Flag "optP" (HasArg (upd . addOptP)) Supported
1241 , Flag "optF" (HasArg (upd . addOptF)) Supported
1242 , Flag "optc" (HasArg (upd . addOptc)) Supported
1243 , Flag "optm" (HasArg (upd . addOptm)) Supported
1244 , Flag "opta" (HasArg (upd . addOpta)) Supported
1245 , Flag "optl" (HasArg (upd . addOptl)) Supported
1246 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1249 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1252 -------- ghc -M -----------------------------------------------------
1253 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1254 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1255 (Deprecated "Use -dep-suffix instead")
1256 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1257 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1258 (Deprecated "Use -dep-makefile instead")
1259 , Flag "optdep-w" (NoArg (return ()))
1260 (Deprecated "-optdep-w doesn't do anything")
1261 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1262 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1263 (Deprecated "Use -include-pkg-deps instead")
1264 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1265 (Deprecated "Use -include-pkg-deps instead")
1266 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1267 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1268 (Deprecated "Use -exclude-module instead")
1269 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1270 (Deprecated "Use -exclude-module instead")
1272 -------- Linking ----------------------------------------------------
1273 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1275 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1276 (Deprecated "Use -c instead")
1277 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1279 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1282 ------- Libraries ---------------------------------------------------
1283 , Flag "L" (Prefix addLibraryPath ) Supported
1284 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1286 ------- Frameworks --------------------------------------------------
1287 -- -framework-path should really be -F ...
1288 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1289 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1291 ------- Output Redirection ------------------------------------------
1292 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1293 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1294 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1295 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1296 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1297 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1298 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1299 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1300 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1301 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1302 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1305 ------- Keeping temporary files -------------------------------------
1306 -- These can be singular (think ghc -c) or plural (think ghc --make)
1307 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1308 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1309 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1310 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1311 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1312 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1313 -- This only makes sense as plural
1314 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1316 ------- Miscellaneous ----------------------------------------------
1317 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1318 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1319 , Flag "main-is" (SepArg setMainIs ) Supported
1320 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1321 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1322 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1324 ------- recompilation checker --------------------------------------
1325 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1326 (Deprecated "Use -fno-force-recomp instead")
1327 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1328 (Deprecated "Use -fforce-recomp instead")
1330 ------ HsCpp opts ---------------------------------------------------
1331 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1332 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1334 ------- Include/Import Paths ----------------------------------------
1335 , Flag "I" (Prefix addIncludePath) Supported
1336 , Flag "i" (OptPrefix addImportPath ) Supported
1338 ------ Debugging ----------------------------------------------------
1339 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1341 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1343 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1345 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1347 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1349 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1351 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1353 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1355 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1357 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1359 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1361 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1363 , Flag "ddump-asm-regalloc-stages"
1364 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1366 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1368 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1370 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1372 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1374 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1376 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1378 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1380 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1382 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1384 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1386 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1388 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1390 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1392 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1394 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1396 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1398 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1400 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1402 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1404 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1406 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1408 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1410 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1412 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1414 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1416 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1418 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1420 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1422 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1424 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1426 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1428 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1430 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1432 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1434 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1436 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1438 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1440 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1442 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1444 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1446 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1448 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1450 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1452 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1455 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1457 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1459 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1461 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1463 , Flag "dshow-passes"
1464 (NoArg (do forceRecompile
1465 setVerbosity (Just 2)))
1467 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1470 ------ Machine dependant (-m<blah>) stuff ---------------------------
1472 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1474 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1476 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1479 ------ Warning opts -------------------------------------------------
1480 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1482 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1484 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1486 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1488 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1489 (Deprecated "Use -w instead")
1490 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1493 ------ Optimisation flags ------------------------------------------
1494 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1495 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1496 (Deprecated "Use -O0 instead")
1497 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1498 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1500 -- If the number is missing, use 1
1502 , Flag "fsimplifier-phases"
1503 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1505 , Flag "fmax-simplifier-iterations"
1506 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1509 , Flag "fspec-constr-threshold"
1510 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1512 , Flag "fno-spec-constr-threshold"
1513 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1515 , Flag "fspec-constr-count"
1516 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1518 , Flag "fno-spec-constr-count"
1519 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1521 , Flag "fliberate-case-threshold"
1522 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1524 , Flag "fno-liberate-case-threshold"
1525 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1528 , Flag "frule-check"
1529 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1531 , Flag "fcontext-stack"
1532 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1535 ------ Profiling ----------------------------------------------------
1537 -- XXX Should the -f* flags be deprecated?
1538 -- They don't seem to be documented
1539 , Flag "fauto-sccs-on-all-toplevs"
1540 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1543 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1545 , Flag "no-auto-all"
1546 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1548 , Flag "fauto-sccs-on-exported-toplevs"
1549 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1552 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1555 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1557 , Flag "fauto-sccs-on-individual-cafs"
1558 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1561 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1564 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1567 ------ DPH flags ----------------------------------------------------
1570 (NoArg (setDPHBackend DPHSeq))
1573 (NoArg (setDPHBackend DPHPar))
1576 (NoArg (setDPHBackend DPHThis))
1579 ------ Compiler flags -----------------------------------------------
1581 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1582 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1583 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1585 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1586 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1587 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1589 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1591 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1594 ++ map (mkFlag True "f" setDynFlag ) fFlags
1595 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1596 ++ map (mkFlag True "X" setDynFlag ) xFlags
1597 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1599 package_flags :: [Flag DynP]
1601 ------- Packages ----------------------------------------------------
1602 Flag "package-conf" (HasArg extraPkgConf_) Supported
1603 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1605 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1606 , Flag "package" (HasArg exposePackage) Supported
1607 , Flag "hide-package" (HasArg hidePackage) Supported
1608 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1610 , Flag "ignore-package" (HasArg ignorePackage)
1612 , Flag "syslib" (HasArg exposePackage)
1613 (Deprecated "Use -package instead")
1616 mkFlag :: Bool -- ^ True <=> it should be turned on
1617 -> String -- ^ The flag prefix
1618 -> (DynFlag -> DynP ())
1619 -> (String, DynFlag, Bool -> Deprecated)
1621 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1622 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1624 deprecatedForLanguage :: String -> Bool -> Deprecated
1625 deprecatedForLanguage lang turn_on
1626 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1628 flag | turn_on = lang
1629 | otherwise = "No"++lang
1631 useInstead :: String -> Bool -> Deprecated
1632 useInstead flag turn_on
1633 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1635 no = if turn_on then "" else "no-"
1637 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1638 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1640 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1641 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1642 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1643 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1644 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1645 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1646 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1647 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1648 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1649 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1650 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1651 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1652 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1653 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1654 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1655 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1656 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1657 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1658 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1659 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1660 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1661 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1662 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1663 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1664 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1665 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1666 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1667 ( "strictness", Opt_Strictness, const Supported ),
1668 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1669 ( "full-laziness", Opt_FullLaziness, const Supported ),
1670 ( "liberate-case", Opt_LiberateCase, const Supported ),
1671 ( "spec-constr", Opt_SpecConstr, const Supported ),
1672 ( "cse", Opt_CSE, const Supported ),
1673 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1674 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1675 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1676 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1677 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1678 ( "case-merge", Opt_CaseMerge, const Supported ),
1679 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1680 ( "method-sharing", Opt_MethodSharing, const Supported ),
1681 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1682 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1683 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1684 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1685 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1686 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1687 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1688 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1689 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1690 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1691 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1692 ( "break-on-error", Opt_BreakOnError, const Supported ),
1693 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1694 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1695 ( "run-cps", Opt_RunCPS, const Supported ),
1696 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1697 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1698 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1699 ( "vectorise", Opt_Vectorise, const Supported ),
1700 ( "regs-graph", Opt_RegsGraph, const Supported ),
1701 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1702 ( "th", Opt_TemplateHaskell,
1703 deprecatedForLanguage "TemplateHaskell" ),
1704 ( "fi", Opt_ForeignFunctionInterface,
1705 deprecatedForLanguage "ForeignFunctionInterface" ),
1706 ( "ffi", Opt_ForeignFunctionInterface,
1707 deprecatedForLanguage "ForeignFunctionInterface" ),
1708 ( "arrows", Opt_Arrows,
1709 deprecatedForLanguage "Arrows" ),
1710 ( "generics", Opt_Generics,
1711 deprecatedForLanguage "Generics" ),
1712 ( "implicit-prelude", Opt_ImplicitPrelude,
1713 deprecatedForLanguage "ImplicitPrelude" ),
1714 ( "bang-patterns", Opt_BangPatterns,
1715 deprecatedForLanguage "BangPatterns" ),
1716 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1717 deprecatedForLanguage "MonomorphismRestriction" ),
1718 ( "mono-pat-binds", Opt_MonoPatBinds,
1719 deprecatedForLanguage "MonoPatBinds" ),
1720 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1721 deprecatedForLanguage "ExtendedDefaultRules" ),
1722 ( "implicit-params", Opt_ImplicitParams,
1723 deprecatedForLanguage "ImplicitParams" ),
1724 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1725 deprecatedForLanguage "ScopedTypeVariables" ),
1727 deprecatedForLanguage "PArr" ),
1728 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1729 deprecatedForLanguage "OverlappingInstances" ),
1730 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1731 deprecatedForLanguage "UndecidableInstances" ),
1732 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1733 deprecatedForLanguage "IncoherentInstances" ),
1734 ( "gen-manifest", Opt_GenManifest, const Supported ),
1735 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1736 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1739 supportedLanguages :: [String]
1740 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1742 -- This may contain duplicates
1743 languageOptions :: [DynFlag]
1744 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1746 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1747 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1749 ( "CPP", Opt_Cpp, const Supported ),
1750 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1751 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1752 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1753 ( "MagicHash", Opt_MagicHash, const Supported ),
1754 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1755 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1756 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1757 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1758 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1759 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1760 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1761 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1762 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1763 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1764 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1765 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1766 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1767 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1768 ( "Arrows", Opt_Arrows, const Supported ),
1769 ( "PArr", Opt_PArr, const Supported ),
1770 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1771 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1772 ( "Generics", Opt_Generics, const Supported ),
1774 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1775 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1776 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1777 ( "RecordPuns", Opt_RecordPuns,
1778 deprecatedForLanguage "NamedFieldPuns" ),
1779 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1780 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1781 ( "GADTs", Opt_GADTs, const Supported ),
1782 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1783 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1784 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1786 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1787 -- On by default (which is not strictly H98):
1788 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1789 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1790 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1791 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1792 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1793 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1795 ( "PatternSignatures", Opt_ScopedTypeVariables,
1796 deprecatedForLanguage "ScopedTypeVariables" ),
1798 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1799 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1800 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1801 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1802 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1803 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1804 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1805 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1806 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1807 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1808 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1809 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1810 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1811 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1812 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1813 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1814 ( "PackageImports", Opt_PackageImports, const Supported ),
1815 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1818 impliedFlags :: [(DynFlag, DynFlag)]
1820 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1821 -- be completely rigid for GADTs
1823 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1824 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1825 -- all over the place
1827 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1828 -- Note [Scoped tyvars] in TcBinds
1829 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1832 glasgowExtsFlags :: [DynFlag]
1833 glasgowExtsFlags = [
1834 Opt_PrintExplicitForalls
1835 , Opt_ForeignFunctionInterface
1836 , Opt_UnliftedFFITypes
1838 , Opt_ImplicitParams
1839 , Opt_ScopedTypeVariables
1841 , Opt_TypeSynonymInstances
1842 , Opt_StandaloneDeriving
1843 , Opt_DeriveDataTypeable
1845 , Opt_DeriveFoldable
1846 , Opt_DeriveTraversable
1847 , Opt_FlexibleContexts
1848 , Opt_FlexibleInstances
1849 , Opt_ConstrainedClassMethods
1850 , Opt_MultiParamTypeClasses
1851 , Opt_FunctionalDependencies
1853 , Opt_PolymorphicComponents
1854 , Opt_ExistentialQuantification
1856 , Opt_PostfixOperators
1858 , Opt_LiberalTypeSynonyms
1862 , Opt_ParallelListComp
1863 , Opt_EmptyDataDecls
1864 , Opt_KindSignatures
1865 , Opt_GeneralizedNewtypeDeriving
1866 , Opt_TypeFamilies ]
1868 -- -----------------------------------------------------------------------------
1869 -- Parsing the dynamic flags.
1871 -- | Parse dynamic flags from a list of command line arguments. Returns the
1872 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1873 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1874 -- flags or missing arguments).
1875 parseDynamicFlags :: Monad m =>
1876 DynFlags -> [Located String]
1877 -> m (DynFlags, [Located String], [Located String])
1878 -- ^ Updated 'DynFlags', left-over arguments, and
1879 -- list of warnings.
1880 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1882 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1883 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1884 parseDynamicNoPackageFlags :: Monad m =>
1885 DynFlags -> [Located String]
1886 -> m (DynFlags, [Located String], [Located String])
1887 -- ^ Updated 'DynFlags', left-over arguments, and
1888 -- list of warnings.
1889 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1891 parseDynamicFlags_ :: Monad m =>
1892 DynFlags -> [Located String] -> Bool
1893 -> m (DynFlags, [Located String], [Located String])
1894 parseDynamicFlags_ dflags args pkg_flags = do
1895 -- XXX Legacy support code
1896 -- We used to accept things like
1897 -- optdep-f -optdepdepend
1898 -- optdep-f -optdep depend
1899 -- optdep -f -optdepdepend
1900 -- optdep -f -optdep depend
1901 -- but the spaces trip up proper argument handling. So get rid of them.
1902 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1903 f (x : xs) = x : f xs
1907 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1908 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1909 | otherwise = dynamic_flags
1911 let ((leftover, errs, warns), dflags')
1912 = runCmdLine (processArgs flag_spec args') dflags
1913 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1914 return (dflags', leftover, warns)
1916 type DynP = CmdLineP DynFlags
1918 upd :: (DynFlags -> DynFlags) -> DynP ()
1920 dfs <- getCmdLineState
1921 putCmdLineState $! (f dfs)
1923 --------------------------
1924 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1925 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1926 ; mapM_ setDynFlag deps }
1928 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1929 -- When you set f, set the ones it implies
1930 -- NB: use setDynFlag recursively, in case the implied flags
1931 -- implies further flags
1932 -- When you un-set f, however, we don't un-set the things it implies
1933 -- (except for -fno-glasgow-exts, which is treated specially)
1935 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1937 --------------------------
1938 setDumpFlag :: DynFlag -> OptKind DynP
1939 setDumpFlag dump_flag
1940 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1942 -- Certain dumpy-things are really interested in what's going
1943 -- on during recompilation checking, so in those cases we
1944 -- don't want to turn it off.
1945 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1946 Opt_D_dump_hi_diffs]
1948 forceRecompile :: DynP ()
1949 -- Whenver we -ddump, force recompilation (by switching off the
1950 -- recompilation checker), else you don't see the dump! However,
1951 -- don't switch it off in --make mode, else *everything* gets
1952 -- recompiled which probably isn't what you want
1953 forceRecompile = do { dfs <- getCmdLineState
1954 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1956 force_recomp dfs = isOneShot (ghcMode dfs)
1958 setVerboseCore2Core :: DynP ()
1959 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1961 upd (\s -> s { shouldDumpSimplPhase = const True })
1963 setDumpSimplPhases :: String -> DynP ()
1964 setDumpSimplPhases s = do forceRecompile
1965 upd (\s -> s { shouldDumpSimplPhase = spec })
1967 spec :: SimplifierMode -> Bool
1969 . map (join (&&) . map match . split ':')
1975 join :: (Bool -> Bool -> Bool)
1976 -> [SimplifierMode -> Bool]
1977 -> SimplifierMode -> Bool
1978 join _ [] = const True
1979 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1981 match :: String -> SimplifierMode -> Bool
1982 match "" = const True
1983 match s = case reads s of
1984 [(n,"")] -> phase_num n
1987 phase_num :: Int -> SimplifierMode -> Bool
1988 phase_num n (SimplPhase k _) = n == k
1989 phase_num _ _ = False
1991 phase_name :: String -> SimplifierMode -> Bool
1992 phase_name s SimplGently = s == "gentle"
1993 phase_name s (SimplPhase _ ss) = s `elem` ss
1995 setVerbosity :: Maybe Int -> DynP ()
1996 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1998 addCmdlineHCInclude :: String -> DynP ()
1999 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2001 extraPkgConf_ :: FilePath -> DynP ()
2002 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2004 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2006 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2008 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2010 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2012 setPackageName :: String -> DynFlags -> DynFlags
2014 | Nothing <- unpackPackageId pid
2015 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2017 = \s -> s{ thisPackage = pid }
2019 pid = stringToPackageId p
2021 -- If we're linking a binary, then only targets that produce object
2022 -- code are allowed (requests for other target types are ignored).
2023 setTarget :: HscTarget -> DynP ()
2024 setTarget l = upd set
2027 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2030 -- Changes the target only if we're compiling object code. This is
2031 -- used by -fasm and -fvia-C, which switch from one to the other, but
2032 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2033 -- can be safely used in an OPTIONS_GHC pragma.
2034 setObjTarget :: HscTarget -> DynP ()
2035 setObjTarget l = upd set
2038 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2041 setOptLevel :: Int -> DynFlags -> DynFlags
2042 setOptLevel n dflags
2043 | hscTarget dflags == HscInterpreted && n > 0
2045 -- not in IO any more, oh well:
2046 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2048 = updOptLevel n dflags
2051 -- -Odph is equivalent to
2053 -- -O2 optimise as much as possible
2054 -- -fno-method-sharing sharing specialisation defeats fusion
2056 -- -fdicts-cheap always inline dictionaries
2057 -- -fmax-simplifier-iterations20 this is necessary sometimes
2058 -- -fsimplifier-phases=3 we use an additional simplifier phase
2060 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2061 -- -fno-spec-constr-count SpecConstr as much as possible
2062 -- -finline-enough-args hack to prevent excessive inlining
2064 setDPHOpt :: DynFlags -> DynFlags
2065 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2067 , specConstrThreshold = Nothing
2068 , specConstrCount = Nothing
2070 `dopt_set` Opt_DictsCheap
2071 `dopt_unset` Opt_MethodSharing
2072 `dopt_set` Opt_InlineIfEnoughArgs
2074 data DPHBackend = DPHPar
2077 deriving(Eq, Ord, Enum, Show)
2079 setDPHBackend :: DPHBackend -> DynP ()
2080 setDPHBackend backend
2082 upd $ \dflags -> dflags { dphBackend = backend }
2083 mapM_ exposePackage (dph_packages backend)
2085 dph_packages DPHThis = []
2086 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2087 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2089 dphPackage :: DynFlags -> PackageId
2090 dphPackage dflags = case dphBackend dflags of
2091 DPHPar -> dphParPackageId
2092 DPHSeq -> dphSeqPackageId
2093 DPHThis -> thisPackage dflags
2095 setMainIs :: String -> DynP ()
2097 | not (null main_fn) && isLower (head main_fn)
2098 -- The arg looked like "Foo.Bar.baz"
2099 = upd $ \d -> d{ mainFunIs = Just main_fn,
2100 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2102 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2103 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2105 | otherwise -- The arg looked like "baz"
2106 = upd $ \d -> d{ mainFunIs = Just arg }
2108 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2110 -----------------------------------------------------------------------------
2111 -- Paths & Libraries
2113 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2115 -- -i on its own deletes the import paths
2116 addImportPath "" = upd (\s -> s{importPaths = []})
2117 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2121 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2124 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2126 addFrameworkPath p =
2127 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2129 #ifndef mingw32_TARGET_OS
2130 split_marker :: Char
2131 split_marker = ':' -- not configurable (ToDo)
2134 splitPathList :: String -> [String]
2135 splitPathList s = filter notNull (splitUp s)
2136 -- empty paths are ignored: there might be a trailing
2137 -- ':' in the initial list, for example. Empty paths can
2138 -- cause confusion when they are translated into -I options
2139 -- for passing to gcc.
2141 #ifndef mingw32_TARGET_OS
2142 splitUp xs = split split_marker xs
2144 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2146 -- That is, if "foo:bar:baz" is used, this interpreted as
2147 -- consisting of three entries, 'foo', 'bar', 'baz'.
2148 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2149 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2151 -- Notice that no attempt is made to fully replace the 'standard'
2152 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2153 -- that this will cause too much breakage for users & ':' will
2154 -- work fine even with DOS paths, if you're not insisting on being silly.
2157 splitUp (x:':':div:xs) | div `elem` dir_markers
2158 = ((x:':':div:p): splitUp rs)
2160 (p,rs) = findNextPath xs
2161 -- we used to check for existence of the path here, but that
2162 -- required the IO monad to be threaded through the command-line
2163 -- parser which is quite inconvenient. The
2164 splitUp xs = cons p (splitUp rs)
2166 (p,rs) = findNextPath xs
2171 -- will be called either when we've consumed nought or the
2172 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2173 -- finding the next split marker.
2175 case break (`elem` split_markers) xs of
2176 (p, _:ds) -> (p, ds)
2179 split_markers :: [Char]
2180 split_markers = [':', ';']
2182 dir_markers :: [Char]
2183 dir_markers = ['/', '\\']
2186 -- -----------------------------------------------------------------------------
2187 -- tmpDir, where we store temporary files.
2189 setTmpDir :: FilePath -> DynFlags -> DynFlags
2190 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2191 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2192 -- seem necessary now --SDM 7/2/2008
2194 -----------------------------------------------------------------------------
2197 setOptHpcDir :: String -> DynP ()
2198 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2200 -----------------------------------------------------------------------------
2201 -- Via-C compilation stuff
2203 -- There are some options that we need to pass to gcc when compiling
2204 -- Haskell code via C, but are only supported by recent versions of
2205 -- gcc. The configure script decides which of these options we need,
2206 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2207 -- read before each via-C compilation. The advantage of having these
2208 -- in a separate file is that the file can be created at install-time
2209 -- depending on the available gcc version, and even re-generated later
2210 -- if gcc is upgraded.
2212 -- The options below are not dependent on the version of gcc, only the
2215 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2216 [String]) -- for registerised HC compilations
2217 machdepCCOpts _dflags
2218 #if alpha_TARGET_ARCH
2220 #ifdef HAVE_THREADED_RTS_SUPPORT
2224 -- For now, to suppress the gcc warning "call-clobbered
2225 -- register used for global register variable", we simply
2226 -- disable all warnings altogether using the -w flag. Oh well.
2228 #elif hppa_TARGET_ARCH
2229 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2230 -- (very nice, but too bad the HP /usr/include files don't agree.)
2231 = ( ["-D_HPUX_SOURCE"], [] )
2233 #elif m68k_TARGET_ARCH
2234 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2235 -- popping of args to routines to be explicit; if we let things
2236 -- be deferred 'til after an STGJUMP, imminent death is certain!
2238 -- -fomit-frame-pointer : *don't*
2239 -- It's better to have a6 completely tied up being a frame pointer
2240 -- rather than let GCC pick random things to do with it.
2241 -- (If we want to steal a6, then we would try to do things
2242 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2243 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2245 #elif i386_TARGET_ARCH
2246 -- -fno-defer-pop : basically the same game as for m68k
2248 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2249 -- the fp (%ebp) for our register maps.
2250 = let n_regs = stolen_x86_regs _dflags
2253 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2256 "-fomit-frame-pointer",
2257 -- we want -fno-builtin, because when gcc inlines
2258 -- built-in functions like memcpy() it tends to
2259 -- run out of registers, requiring -monly-n-regs
2261 "-DSTOLEN_X86_REGS="++show n_regs ]
2264 #elif ia64_TARGET_ARCH
2265 = ( [], ["-fomit-frame-pointer", "-G0"] )
2267 #elif x86_64_TARGET_ARCH
2269 #if darwin_TARGET_OS
2274 ["-fomit-frame-pointer",
2275 "-fno-asynchronous-unwind-tables",
2276 -- the unwind tables are unnecessary for HC code,
2277 -- and get in the way of -split-objs. Another option
2278 -- would be to throw them away in the mangler, but this
2281 -- calling builtins like strlen() using the FFI can
2282 -- cause gcc to run out of regs, so use the external
2286 #elif sparc_TARGET_ARCH
2288 -- For now, to suppress the gcc warning "call-clobbered
2289 -- register used for global register variable", we simply
2290 -- disable all warnings altogether using the -w flag. Oh well.
2292 #elif powerpc_apple_darwin_TARGET
2294 -- Disable Apple's precompiling preprocessor. It's a great thing
2295 -- for "normal" programs, but it doesn't support register variable
2297 = ( [], ["-no-cpp-precomp"] )
2302 picCCOpts :: DynFlags -> [String]
2304 #if darwin_TARGET_OS
2305 -- Apple prefers to do things the other way round.
2306 -- PIC is on by default.
2307 -- -mdynamic-no-pic:
2308 -- Turn off PIC code generation.
2310 -- Don't generate "common" symbols - these are unwanted
2311 -- in dynamic libraries.
2314 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2316 = ["-mdynamic-no-pic"]
2317 #elif mingw32_TARGET_OS
2318 -- no -fPIC for Windows
2320 = ["-U __PIC__","-D__PIC__"]
2324 | opt_PIC || not opt_Static
2325 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2330 -- -----------------------------------------------------------------------------
2334 can_split = cSplitObjs == "YES"
2336 -- -----------------------------------------------------------------------------
2339 compilerInfo :: [(String, String)]
2340 compilerInfo = [("Project name", cProjectName),
2341 ("Project version", cProjectVersion),
2342 ("Booter version", cBooterVersion),
2344 ("Interface file version", cHscIfaceFileVersion),
2345 ("Have interpreter", cGhcWithInterpreter),
2346 ("Object splitting", cSplitObjs),
2347 ("Have native code generator", cGhcWithNativeCodeGen),
2348 ("Support SMP", cGhcWithSMP),
2349 ("Unregisterised", cGhcUnregisterised),
2350 ("Tables next to code", cGhcEnableTablesNextToCode),
2351 ("Win32 DLLs", cEnableWin32DLLs),
2352 ("RTS ways", cGhcRTSWays),
2353 ("Leading underscore", cLeadingUnderscore),
2354 ("Debug on", show debugIsOn)