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,
25 -- ** Manipulating DynFlags
26 defaultDynFlags, -- DynFlags
27 initDynFlags, -- DynFlags -> IO DynFlags
29 dopt, -- DynFlag -> DynFlags -> Bool
30 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
31 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
38 -- ** Parsing DynFlags
40 parseDynamicNoPackageFlags,
43 supportedLanguages, languageOptions,
45 -- ** DynFlag C compiler options
46 machdepCCOpts, picCCOpts,
48 -- * Configuration of the core-to-core passes
55 -- * Configuration of the stg-to-stg passes
59 -- * 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 )
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_WarnDodgyExports
190 | Opt_WarnDodgyImports
193 | Opt_WarnUnrecognisedPragmas
194 | Opt_WarnDodgyForeignImports
195 | Opt_WarnLazyUnliftedBindings
196 | Opt_WarnUnusedDoBind
197 | Opt_WarnWrongDoBind
201 | Opt_OverlappingInstances
202 | Opt_UndecidableInstances
203 | Opt_IncoherentInstances
204 | Opt_MonomorphismRestriction
207 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
208 | Opt_ForeignFunctionInterface
209 | Opt_UnliftedFFITypes
210 | Opt_GHCForeignImportPrim
211 | Opt_PArr -- Syntactic support for parallel arrays
212 | Opt_Arrows -- Arrow-notation syntax
213 | Opt_TemplateHaskell
216 | Opt_Generics -- "Derivable type classes"
217 | Opt_ImplicitPrelude
218 | Opt_ScopedTypeVariables
222 | Opt_OverloadedStrings
223 | Opt_DisambiguateRecordFields
224 | Opt_RecordWildCards
231 | Opt_StandaloneDeriving
232 | Opt_DeriveDataTypeable
234 | Opt_DeriveTraversable
237 | Opt_TypeSynonymInstances
238 | Opt_FlexibleContexts
239 | Opt_FlexibleInstances
240 | Opt_ConstrainedClassMethods
241 | Opt_MultiParamTypeClasses
242 | Opt_FunctionalDependencies
244 | Opt_PolymorphicComponents
245 | Opt_ExistentialQuantification
249 | Opt_ParallelListComp
250 | Opt_TransformListComp
251 | Opt_GeneralizedNewtypeDeriving
253 | Opt_PostfixOperators
256 | Opt_LiberalTypeSynonyms
259 | Opt_ImpredicativeTypes
262 | Opt_NewQualifiedOperators
264 | Opt_PrintExplicitForalls
269 | Opt_StaticArgumentTransformation
273 | Opt_IgnoreInterfacePragmas
274 | Opt_OmitInterfacePragmas
275 | Opt_DoLambdaEtaExpansion
279 | Opt_UnboxStrictFields
282 | Opt_InlineIfEnoughArgs
283 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
285 | Opt_RegsGraph -- do graph coloring register allocation
286 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
289 | Opt_AutoSccsOnAllToplevs
290 | Opt_AutoSccsOnExportedToplevs
291 | Opt_AutoSccsOnIndividualCafs
299 | Opt_ExcessPrecision
300 | Opt_EagerBlackHoling
301 | Opt_ReadUserPackageConf
305 | Opt_HideAllPackages
306 | Opt_PrintBindResult
310 | Opt_BreakOnException
312 | Opt_PrintEvldWithShow
313 | Opt_PrintBindContents
316 | Opt_EmitExternalCore
318 | Opt_BuildingCabalPackage
323 | Opt_ConvertToZipCfgAndBack
324 | Opt_AutoLinkPackages
325 | Opt_ImplicitImportQualified
334 | Opt_KeepRawTokenStream
338 -- | Contains not only a collection of 'DynFlag's but also a plethora of
339 -- information relating to the compilation of a single file or GHC session
340 data DynFlags = DynFlags {
343 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
344 stgToDo :: Maybe [StgToDo], -- similarly
345 hscTarget :: HscTarget,
346 hscOutName :: String, -- ^ Name of the output file
347 extCoreName :: String, -- ^ Name of the .hcr output file
348 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
349 optLevel :: Int, -- ^ Optimisation level
350 simplPhases :: Int, -- ^ Number of simplifier phases
351 maxSimplIterations :: Int, -- ^ Max simplifier iterations
352 shouldDumpSimplPhase :: SimplifierMode -> Bool,
353 ruleCheck :: Maybe String,
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 wayNames :: [WayName], -- ^ 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 (UniqFM 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 -- | The target code type of the compilation (if any).
476 -- Whenever you change the target, also make sure to set 'ghcLink' to
477 -- something sensible.
479 -- 'HscNothing' can be used to avoid generating any output, however, note
482 -- * This will not run the desugaring step, thus no warnings generated in
483 -- this step will be output. In particular, this includes warnings related
484 -- to pattern matching. You can run the desugarer manually using
485 -- 'GHC.desugarModule'.
487 -- * If a program uses Template Haskell the typechecker may try to run code
488 -- from an imported module. This will fail if no code has been generated
489 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
490 -- whether this might be the case and choose to either switch to a
491 -- different target or avoid typechecking such modules. (The latter may
492 -- preferable for security reasons.)
495 = HscC -- ^ Generate C code.
496 | HscAsm -- ^ Generate assembly using the native code generator.
497 | HscJava -- ^ Generate Java bytecode.
498 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
499 | HscNothing -- ^ Don't generate any code. See notes above.
502 -- | Will this target result in an object file on the disk?
503 isObjectTarget :: HscTarget -> Bool
504 isObjectTarget HscC = True
505 isObjectTarget HscAsm = True
506 isObjectTarget _ = False
508 -- | The 'GhcMode' tells us whether we're doing multi-module
509 -- compilation (controlled via the "GHC" API) or one-shot
510 -- (single-module) compilation. This makes a difference primarily to
511 -- the "Finder": in one-shot mode we look for interface files for
512 -- imported modules, but in multi-module mode we look for source files
513 -- in order to check whether they need to be recompiled.
515 = CompManager -- ^ @\-\-make@, GHCi, etc.
516 | OneShot -- ^ @ghc -c Foo.hs@
517 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
520 instance Outputable GhcMode where
521 ppr CompManager = ptext (sLit "CompManager")
522 ppr OneShot = ptext (sLit "OneShot")
523 ppr MkDepend = ptext (sLit "MkDepend")
525 isOneShot :: GhcMode -> Bool
526 isOneShot OneShot = True
527 isOneShot _other = False
529 -- | What to do in the link step, if there is one.
531 = NoLink -- ^ Don't link at all
532 | LinkBinary -- ^ Link object code into a binary
533 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
534 -- bytecode and object code).
535 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
538 isNoLink :: GhcLink -> Bool
539 isNoLink NoLink = True
542 -- Is it worth evaluating this Bool and caching it in the DynFlags value
543 -- during initDynFlags?
544 doingTickyProfiling :: DynFlags -> Bool
545 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
548 = ExposePackage String
550 | IgnorePackage String
553 defaultHscTarget :: HscTarget
554 defaultHscTarget = defaultObjectTarget
556 -- | The 'HscTarget' value corresponding to the default way to create
557 -- object files on the current platform.
558 defaultObjectTarget :: HscTarget
560 | cGhcWithNativeCodeGen == "YES" = HscAsm
565 | Wrapped (Maybe String)
569 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
570 initDynFlags :: DynFlags -> IO DynFlags
571 initDynFlags dflags = do
572 -- someday these will be dynamic flags
573 ways <- readIORef v_Ways
574 build_tag <- readIORef v_Build_tag
575 rts_build_tag <- readIORef v_RTS_Build_tag
576 refFilesToClean <- newIORef []
577 refDirsToClean <- newIORef emptyFM
580 buildTag = build_tag,
581 rtsBuildTag = rts_build_tag,
582 filesToClean = refFilesToClean,
583 dirsToClean = refDirsToClean
586 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
587 -- and must be fully initialized by 'GHC.newSession' first.
588 defaultDynFlags :: DynFlags
591 ghcMode = CompManager,
592 ghcLink = LinkBinary,
595 hscTarget = defaultHscTarget,
601 maxSimplIterations = 4,
602 shouldDumpSimplPhase = const False,
604 specConstrThreshold = Just 200,
605 specConstrCount = Just 3,
606 liberateCaseThreshold = Just 200,
607 #ifndef OMIT_NATIVE_CODEGEN
608 targetPlatform = defaultTargetPlatform,
611 cmdlineHcIncludes = [],
615 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
619 thisPackage = mainPackageId,
625 objectSuf = phaseInputExt StopLn,
626 hcSuf = phaseInputExt HCc,
629 outputFile = Nothing,
631 dynLibLoader = SystemDependent,
632 dumpPrefix = Nothing,
633 dumpPrefixForce = Nothing,
637 cmdlineFrameworks = [],
638 tmpDir = cDEFAULT_TMPDIR,
644 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
655 pkgDatabase = Nothing,
656 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
657 wayNames = panic "defaultDynFlags: No wayNames",
658 buildTag = panic "defaultDynFlags: No buildTag",
659 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
661 -- initSysTools fills all these in
662 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
663 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
664 topDir = panic "defaultDynFlags: No topDir",
665 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
666 pgm_L = panic "defaultDynFlags: No pgm_L",
667 pgm_P = panic "defaultDynFlags: No pgm_P",
668 pgm_F = panic "defaultDynFlags: No pgm_F",
669 pgm_c = panic "defaultDynFlags: No pgm_c",
670 pgm_m = panic "defaultDynFlags: No pgm_m",
671 pgm_s = panic "defaultDynFlags: No pgm_s",
672 pgm_a = panic "defaultDynFlags: No pgm_a",
673 pgm_l = panic "defaultDynFlags: No pgm_l",
674 pgm_dll = panic "defaultDynFlags: No pgm_dll",
675 pgm_T = panic "defaultDynFlags: No pgm_T",
676 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
677 pgm_windres = panic "defaultDynFlags: No pgm_windres",
678 -- end of initSysTools values
680 depMakefile = "Makefile",
681 depIncludePkgDeps = False,
684 -- end of ghc -M values
685 filesToClean = panic "defaultDynFlags: No filesToClean",
686 dirsToClean = panic "defaultDynFlags: No dirsToClean",
687 haddockOptions = Nothing,
689 Opt_AutoLinkPackages,
690 Opt_ReadUserPackageConf,
692 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
693 -- behaviour the default, to see if anyone notices
697 Opt_MonomorphismRestriction,
708 Opt_PrintBindContents
710 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
711 -- The default -O0 options
714 log_action = \severity srcSpan style msg ->
716 SevInfo -> printErrs (msg style)
717 SevFatal -> printErrs (msg style)
720 printErrs ((mkLocMessage srcSpan msg) style)
721 -- careful (#2302): printErrs prints in UTF-8, whereas
722 -- converting to string first and using hPutStr would
723 -- just emit the low 8 bits of each unicode char.
730 0 | print errors & warnings only
731 1 | minimal verbosity: print "compiling M ... done." for each module.
732 2 | equivalent to -dshow-passes
733 3 | equivalent to existing "ghc -v"
734 4 | "ghc -v -ddump-most"
735 5 | "ghc -v -ddump-all"
738 -- | Test whether a 'DynFlag' is set
739 dopt :: DynFlag -> DynFlags -> Bool
740 dopt f dflags = f `elem` (flags dflags)
743 dopt_set :: DynFlags -> DynFlag -> DynFlags
744 dopt_set dfs f = dfs{ flags = f : flags dfs }
746 -- | Unset a 'DynFlag'
747 dopt_unset :: DynFlags -> DynFlag -> DynFlags
748 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
750 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
751 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
752 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
753 -> [a] -- ^ Correctly ordered extracted options
754 getOpts dflags opts = reverse (opts dflags)
755 -- We add to the options from the front, so we need to reverse the list
757 -- | Gets the verbosity flag for the current verbosity level. This is fed to
758 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
759 getVerbFlag :: DynFlags -> String
761 | verbosity dflags >= 3 = "-v"
764 setObjectDir, setHiDir, setStubDir, setOutputDir,
765 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
766 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
767 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
768 addCmdlineFramework, addHaddockOpts
769 :: String -> DynFlags -> DynFlags
770 setOutputFile, setOutputHi, setDumpPrefixForce
771 :: Maybe String -> DynFlags -> DynFlags
773 setObjectDir f d = d{ objectDir = Just f}
774 setHiDir f d = d{ hiDir = Just f}
775 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
776 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
777 -- \#included from the .hc file when compiling with -fvia-C.
778 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
780 setObjectSuf f d = d{ objectSuf = f}
781 setHiSuf f d = d{ hiSuf = f}
782 setHcSuf f d = d{ hcSuf = f}
784 setOutputFile f d = d{ outputFile = f}
785 setOutputHi f d = d{ outputHi = f}
787 parseDynLibLoaderMode f d =
789 ("deploy", "") -> d{ dynLibLoader = Deployable }
790 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
791 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
792 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
793 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
794 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
796 setDumpPrefixForce f d = d { dumpPrefixForce = f}
798 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
799 -- Config.hs should really use Option.
800 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
802 setPgmL f d = d{ pgm_L = f}
803 setPgmF f d = d{ pgm_F = f}
804 setPgmc f d = d{ pgm_c = (f,[])}
805 setPgmm f d = d{ pgm_m = (f,[])}
806 setPgms f d = d{ pgm_s = (f,[])}
807 setPgma f d = d{ pgm_a = (f,[])}
808 setPgml f d = d{ pgm_l = (f,[])}
809 setPgmdll f d = d{ pgm_dll = (f,[])}
810 setPgmwindres f d = d{ pgm_windres = f}
812 addOptL f d = d{ opt_L = f : opt_L d}
813 addOptP f d = d{ opt_P = f : opt_P d}
814 addOptF f d = d{ opt_F = f : opt_F d}
815 addOptc f d = d{ opt_c = f : opt_c d}
816 addOptm f d = d{ opt_m = f : opt_m d}
817 addOpta f d = d{ opt_a = f : opt_a d}
818 addOptl f d = d{ opt_l = f : opt_l d}
819 addOptwindres f d = d{ opt_windres = f : opt_windres d}
821 setDepMakefile :: FilePath -> DynFlags -> DynFlags
822 setDepMakefile f d = d { depMakefile = deOptDep f }
824 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
825 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
827 addDepExcludeMod :: String -> DynFlags -> DynFlags
829 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
831 addDepSuffix :: FilePath -> DynFlags -> DynFlags
832 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
835 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
836 -- we need to strip the "-optdep" off of the arg
837 deOptDep :: String -> String
838 deOptDep x = case stripPrefix "-optdep" x of
842 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
844 addHaddockOpts f d = d{ haddockOptions = Just f}
846 -- -----------------------------------------------------------------------------
847 -- Command-line options
849 -- | When invoking external tools as part of the compilation pipeline, we
850 -- pass these a sequence of options on the command-line. Rather than
851 -- just using a list of Strings, we use a type that allows us to distinguish
852 -- between filepaths and 'other stuff'. The reason for this is that
853 -- this type gives us a handle on transforming filenames, and filenames only,
854 -- to whatever format they're expected to be on a particular platform.
856 = FileOption -- an entry that _contains_ filename(s) / filepaths.
857 String -- a non-filepath prefix that shouldn't be
858 -- transformed (e.g., "/out=")
859 String -- the filepath/filename portion
862 showOpt :: Option -> String
863 showOpt (FileOption pre f) = pre ++ f
864 showOpt (Option s) = s
866 -----------------------------------------------------------------------------
867 -- Setting the optimisation level
869 updOptLevel :: Int -> DynFlags -> DynFlags
870 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
872 = dfs2{ optLevel = final_n }
874 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
875 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
876 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
878 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
879 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
881 optLevelFlags :: [([Int], DynFlag)]
883 = [ ([0], Opt_IgnoreInterfacePragmas)
884 , ([0], Opt_OmitInterfacePragmas)
886 , ([1,2], Opt_IgnoreAsserts)
887 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
889 , ([1,2], Opt_DoEtaReduction)
890 , ([1,2], Opt_CaseMerge)
891 , ([1,2], Opt_Strictness)
893 , ([1,2], Opt_FullLaziness)
895 , ([2], Opt_LiberateCase)
896 , ([2], Opt_SpecConstr)
898 -- , ([2], Opt_StaticArgumentTransformation)
899 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
900 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
901 -- several improvements to the heuristics, and I'm concerned that without
902 -- those changes SAT will interfere with some attempts to write "high
903 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
904 -- this year. In particular, the version in HEAD lacks the tail call
905 -- criterion, so many things that look like reasonable loops will be
906 -- turned into functions with extra (unneccesary) thunk creation.
908 , ([0,1,2], Opt_DoLambdaEtaExpansion)
909 -- This one is important for a tiresome reason:
910 -- we want to make sure that the bindings for data
911 -- constructors are eta-expanded. This is probably
912 -- a good thing anyway, but it seems fragile.
915 -- -----------------------------------------------------------------------------
916 -- Standard sets of warning options
918 standardWarnings :: [DynFlag]
920 = [ Opt_WarnWarningsDeprecations,
921 Opt_WarnDeprecatedFlags,
922 Opt_WarnUnrecognisedPragmas,
923 Opt_WarnOverlappingPatterns,
924 Opt_WarnMissingFields,
925 Opt_WarnMissingMethods,
926 Opt_WarnDuplicateExports,
927 Opt_WarnLazyUnliftedBindings,
928 Opt_WarnDodgyForeignImports,
932 minusWOpts :: [DynFlag]
934 = standardWarnings ++
935 [ Opt_WarnUnusedBinds,
936 Opt_WarnUnusedMatches,
937 Opt_WarnUnusedImports,
938 Opt_WarnIncompletePatterns,
939 Opt_WarnDodgyExports,
943 minusWallOpts :: [DynFlag]
946 [ Opt_WarnTypeDefaults,
947 Opt_WarnNameShadowing,
954 -- minuswRemovesOpts should be every warning option
955 minuswRemovesOpts :: [DynFlag]
958 [Opt_WarnImplicitPrelude,
959 Opt_WarnIncompletePatternsRecUpd,
960 Opt_WarnSimplePatterns,
961 Opt_WarnMonomorphism,
962 Opt_WarnUnrecognisedPragmas,
966 -- -----------------------------------------------------------------------------
967 -- CoreToDo: abstraction of core-to-core passes to run.
969 data CoreToDo -- These are diff core-to-core passes,
970 -- which may be invoked in any order,
971 -- as many times as you like.
973 = CoreDoSimplify -- The core-to-core simplifier.
976 -- Each run of the simplifier can take a different
977 -- set of simplifier-specific flags.
979 | CoreDoFloatOutwards FloatOutSwitches
984 | CoreDoWorkerWrapper
987 | CoreDoOldStrictness
990 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
991 -- matching this string
992 | CoreDoVectorisation PackageId
993 | CoreDoNothing -- Useful when building up
994 | CoreDoPasses [CoreToDo] -- lists of these things
997 data SimplifierMode -- See comments in SimplMonad
999 | SimplPhase Int [String]
1001 instance Outputable SimplifierMode where
1002 ppr SimplGently = ptext (sLit "gentle")
1003 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1006 data SimplifierSwitch
1007 = MaxSimplifierIterations Int
1011 data FloatOutSwitches = FloatOutSwitches {
1012 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1013 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1014 -- even if they do not escape a lambda
1017 instance Outputable FloatOutSwitches where
1018 ppr = pprFloatOutSwitches
1020 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1021 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1022 <+> pp_not (floatOutConstants sw) <+> text "constants"
1025 pp_not False = text "not"
1027 -- | Switches that specify the minimum amount of floating out
1028 -- gentleFloatOutSwitches :: FloatOutSwitches
1029 -- gentleFloatOutSwitches = FloatOutSwitches False False
1031 -- | Switches that do not specify floating out of lambdas, just of constants
1032 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1033 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1036 -- The core-to-core pass ordering is derived from the DynFlags:
1037 runWhen :: Bool -> CoreToDo -> CoreToDo
1038 runWhen True do_this = do_this
1039 runWhen False _ = CoreDoNothing
1041 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1042 runMaybe (Just x) f = f x
1043 runMaybe Nothing _ = CoreDoNothing
1045 getCoreToDo :: DynFlags -> [CoreToDo]
1047 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1048 | otherwise = core_todo
1050 opt_level = optLevel dflags
1051 phases = simplPhases dflags
1052 max_iter = maxSimplIterations dflags
1053 strictness = dopt Opt_Strictness dflags
1054 full_laziness = dopt Opt_FullLaziness dflags
1055 cse = dopt Opt_CSE dflags
1056 spec_constr = dopt Opt_SpecConstr dflags
1057 liberate_case = dopt Opt_LiberateCase dflags
1058 rule_check = ruleCheck dflags
1059 static_args = dopt Opt_StaticArgumentTransformation dflags
1061 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1063 simpl_phase phase names iter
1065 [ CoreDoSimplify (SimplPhase phase names) [
1066 MaxSimplifierIterations iter
1068 maybe_rule_check phase
1072 = runWhen (dopt Opt_Vectorise dflags)
1073 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1076 -- By default, we have 2 phases before phase 0.
1078 -- Want to run with inline phase 2 after the specialiser to give
1079 -- maximum chance for fusion to work before we inline build/augment
1080 -- in phase 1. This made a difference in 'ansi' where an
1081 -- overloaded function wasn't inlined till too late.
1083 -- Need phase 1 so that build/augment get
1084 -- inlined. I found that spectral/hartel/genfft lost some useful
1085 -- strictness in the function sumcode' if augment is not inlined
1086 -- before strictness analysis runs
1087 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1088 | phase <- [phases, phases-1 .. 1] ]
1091 -- initial simplify: mk specialiser happy: minimum effort please
1092 simpl_gently = CoreDoSimplify SimplGently [
1093 -- Simplify "gently"
1094 -- Don't inline anything till full laziness has bitten
1095 -- In particular, inlining wrappers inhibits floating
1096 -- e.g. ...(case f x of ...)...
1097 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1098 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1099 -- and now the redex (f x) isn't floatable any more
1100 -- Similarly, don't apply any rules until after full
1101 -- laziness. Notably, list fusion can prevent floating.
1103 NoCaseOfCase, -- Don't do case-of-case transformations.
1104 -- This makes full laziness work better
1105 MaxSimplifierIterations max_iter
1109 if opt_level == 0 then
1111 simpl_phase 0 ["final"] max_iter]
1112 else {- opt_level >= 1 -} [
1114 -- We want to do the static argument transform before full laziness as it
1115 -- may expose extra opportunities to float things outwards. However, to fix
1116 -- up the output of the transformation we need at do at least one simplify
1117 -- after this before anything else
1118 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1120 -- We run vectorisation here for now, but we might also try to run
1124 -- initial simplify: mk specialiser happy: minimum effort please
1127 -- Specialisation is best done before full laziness
1128 -- so that overloaded functions have all their dictionary lambdas manifest
1131 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1132 -- Was: gentleFloatOutSwitches
1133 -- I have no idea why, but not floating constants to top level is
1134 -- very bad in some cases.
1135 -- Notably: p_ident in spectral/rewrite
1136 -- Changing from "gentle" to "constantsOnly" improved
1137 -- rewrite's allocation by 19%, and made 0.0% difference
1138 -- to any other nofib benchmark
1144 -- Phase 0: allow all Ids to be inlined now
1145 -- This gets foldr inlined before strictness analysis
1147 -- At least 3 iterations because otherwise we land up with
1148 -- huge dead expressions because of an infelicity in the
1150 -- let k = BIG in foldr k z xs
1151 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1152 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1154 simpl_phase 0 ["main"] (max max_iter 3),
1157 #ifdef OLD_STRICTNESS
1158 CoreDoOldStrictness,
1160 runWhen strictness (CoreDoPasses [
1162 CoreDoWorkerWrapper,
1164 simpl_phase 0 ["post-worker-wrapper"] max_iter
1167 runWhen full_laziness
1168 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1169 -- nofib/spectral/hartel/wang doubles in speed if you
1170 -- do full laziness late in the day. It only happens
1171 -- after fusion and other stuff, so the early pass doesn't
1172 -- catch it. For the record, the redex is
1173 -- f_el22 (f_el21 r_midblock)
1176 runWhen cse CoreCSE,
1177 -- We want CSE to follow the final full-laziness pass, because it may
1178 -- succeed in commoning up things floated out by full laziness.
1179 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1185 -- Case-liberation for -O2. This should be after
1186 -- strictness analysis and the simplification which follows it.
1187 runWhen liberate_case (CoreDoPasses [
1189 simpl_phase 0 ["post-liberate-case"] max_iter
1190 ]), -- Run the simplifier after LiberateCase to vastly
1191 -- reduce the possiblility of shadowing
1192 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1194 runWhen spec_constr CoreDoSpecConstr,
1198 -- Final clean-up simplification:
1199 simpl_phase 0 ["final"] max_iter
1202 -- -----------------------------------------------------------------------------
1203 -- StgToDo: abstraction of stg-to-stg passes to run.
1206 = StgDoMassageForProfiling -- should be (next to) last
1207 -- There's also setStgVarInfo, but its absolute "lastness"
1208 -- is so critical that it is hardwired in (no flag).
1211 getStgToDo :: DynFlags -> [StgToDo]
1213 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1216 stg_stats = dopt Opt_StgStats dflags
1218 todo1 = if stg_stats then [D_stg_stats] else []
1220 todo2 | WayProf `elem` wayNames dflags
1221 = StgDoMassageForProfiling : todo1
1225 -- -----------------------------------------------------------------------------
1228 allFlags :: [String]
1229 allFlags = map ('-':) $
1230 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1231 map ("fno-"++) flags ++
1232 map ("f"++) flags ++
1233 map ("X"++) supportedLanguages ++
1234 map ("XNo"++) supportedLanguages
1235 where ok (PrefixPred _ _) = False
1237 flags = [ name | (name, _, _) <- fFlags ]
1239 dynamic_flags :: [Flag DynP]
1241 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1242 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1243 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1244 , Flag "#include" (HasArg (addCmdlineHCInclude))
1245 (Deprecated "No longer has any effect")
1246 , Flag "v" (OptIntSuffix setVerbosity) Supported
1248 ------- Specific phases --------------------------------------------
1249 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1250 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1251 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1252 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1253 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1254 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1255 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1256 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1257 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1258 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1260 , Flag "optL" (HasArg (upd . addOptL)) Supported
1261 , Flag "optP" (HasArg (upd . addOptP)) Supported
1262 , Flag "optF" (HasArg (upd . addOptF)) Supported
1263 , Flag "optc" (HasArg (upd . addOptc)) Supported
1264 , Flag "optm" (HasArg (upd . addOptm)) Supported
1265 , Flag "opta" (HasArg (upd . addOpta)) Supported
1266 , Flag "optl" (HasArg (upd . addOptl)) Supported
1267 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1270 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1273 -------- ghc -M -----------------------------------------------------
1274 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1275 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1276 (Deprecated "Use -dep-suffix instead")
1277 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1278 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1279 (Deprecated "Use -dep-makefile instead")
1280 , Flag "optdep-w" (NoArg (return ()))
1281 (Deprecated "-optdep-w doesn't do anything")
1282 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1283 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1284 (Deprecated "Use -include-pkg-deps instead")
1285 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1286 (Deprecated "Use -include-pkg-deps instead")
1287 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1288 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1289 (Deprecated "Use -exclude-module instead")
1290 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1291 (Deprecated "Use -exclude-module instead")
1293 -------- Linking ----------------------------------------------------
1294 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1296 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1297 (Deprecated "Use -c instead")
1298 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1300 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1303 ------- Libraries ---------------------------------------------------
1304 , Flag "L" (Prefix addLibraryPath ) Supported
1305 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1307 ------- Frameworks --------------------------------------------------
1308 -- -framework-path should really be -F ...
1309 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1310 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1312 ------- Output Redirection ------------------------------------------
1313 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1314 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1315 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1316 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1317 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1318 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1319 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1320 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1321 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1322 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1323 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1326 ------- Keeping temporary files -------------------------------------
1327 -- These can be singular (think ghc -c) or plural (think ghc --make)
1328 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1329 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1330 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1331 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1332 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1333 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1334 -- This only makes sense as plural
1335 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1337 ------- Miscellaneous ----------------------------------------------
1338 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1339 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1340 , Flag "main-is" (SepArg setMainIs ) Supported
1341 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1342 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1343 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1345 ------- recompilation checker --------------------------------------
1346 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1347 (Deprecated "Use -fno-force-recomp instead")
1348 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1349 (Deprecated "Use -fforce-recomp instead")
1351 ------ HsCpp opts ---------------------------------------------------
1352 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1353 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1355 ------- Include/Import Paths ----------------------------------------
1356 , Flag "I" (Prefix addIncludePath) Supported
1357 , Flag "i" (OptPrefix addImportPath ) Supported
1359 ------ Debugging ----------------------------------------------------
1360 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1362 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1364 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1366 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1368 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1370 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1372 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1374 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1376 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1378 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1380 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1382 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1384 , Flag "ddump-asm-regalloc-stages"
1385 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1387 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1389 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1391 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1393 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1395 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1397 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1399 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1401 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1403 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1405 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1407 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1409 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1411 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1413 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1415 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1417 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1419 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1421 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1423 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1425 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1427 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1429 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1431 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1433 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1435 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1437 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1439 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1441 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1443 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1445 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1447 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1449 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1451 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1453 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1455 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1457 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1459 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1461 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1463 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1465 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1467 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1469 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1471 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1473 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1476 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1478 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1480 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1482 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1484 , Flag "dshow-passes"
1485 (NoArg (do forceRecompile
1486 setVerbosity (Just 2)))
1488 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1491 ------ Machine dependant (-m<blah>) stuff ---------------------------
1493 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1495 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1497 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1500 ------ Warning opts -------------------------------------------------
1501 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1503 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1505 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1507 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1509 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1510 (Deprecated "Use -w instead")
1511 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1514 ------ Optimisation flags ------------------------------------------
1515 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1516 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1517 (Deprecated "Use -O0 instead")
1518 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1519 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1521 -- If the number is missing, use 1
1523 , Flag "fsimplifier-phases"
1524 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1526 , Flag "fmax-simplifier-iterations"
1527 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1530 , Flag "fspec-constr-threshold"
1531 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1533 , Flag "fno-spec-constr-threshold"
1534 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1536 , Flag "fspec-constr-count"
1537 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1539 , Flag "fno-spec-constr-count"
1540 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1542 , Flag "fliberate-case-threshold"
1543 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1545 , Flag "fno-liberate-case-threshold"
1546 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1549 , Flag "frule-check"
1550 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1552 , Flag "fcontext-stack"
1553 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1556 ------ Profiling ----------------------------------------------------
1558 -- XXX Should the -f* flags be deprecated?
1559 -- They don't seem to be documented
1560 , Flag "fauto-sccs-on-all-toplevs"
1561 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1564 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1566 , Flag "no-auto-all"
1567 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1569 , Flag "fauto-sccs-on-exported-toplevs"
1570 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1573 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1576 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1578 , Flag "fauto-sccs-on-individual-cafs"
1579 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1582 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1585 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1588 ------ DPH flags ----------------------------------------------------
1591 (NoArg (setDPHBackend DPHSeq))
1594 (NoArg (setDPHBackend DPHPar))
1597 (NoArg (setDPHBackend DPHThis))
1600 ------ Compiler flags -----------------------------------------------
1602 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1603 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1604 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1606 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1607 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1608 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1610 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1612 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1615 ++ map (mkFlag True "f" setDynFlag ) fFlags
1616 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1617 ++ map (mkFlag True "X" setDynFlag ) xFlags
1618 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1620 package_flags :: [Flag DynP]
1622 ------- Packages ----------------------------------------------------
1623 Flag "package-conf" (HasArg extraPkgConf_) Supported
1624 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1626 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1627 , Flag "package" (HasArg exposePackage) Supported
1628 , Flag "hide-package" (HasArg hidePackage) Supported
1629 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1631 , Flag "ignore-package" (HasArg ignorePackage)
1633 , Flag "syslib" (HasArg exposePackage)
1634 (Deprecated "Use -package instead")
1637 mkFlag :: Bool -- ^ True <=> it should be turned on
1638 -> String -- ^ The flag prefix
1639 -> (DynFlag -> DynP ())
1640 -> (String, DynFlag, Bool -> Deprecated)
1642 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1643 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1645 deprecatedForLanguage :: String -> Bool -> Deprecated
1646 deprecatedForLanguage lang turn_on
1647 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1649 flag | turn_on = lang
1650 | otherwise = "No"++lang
1652 useInstead :: String -> Bool -> Deprecated
1653 useInstead flag turn_on
1654 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1656 no = if turn_on then "" else "no-"
1658 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1659 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1661 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1662 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1663 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1664 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1665 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1666 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1667 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1668 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1669 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1670 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1671 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1672 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1673 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1674 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1675 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1676 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1677 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1678 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1679 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1680 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1681 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1682 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1683 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1684 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1685 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1686 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1687 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1688 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1689 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1690 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1691 ( "strictness", Opt_Strictness, const Supported ),
1692 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1693 ( "full-laziness", Opt_FullLaziness, const Supported ),
1694 ( "liberate-case", Opt_LiberateCase, const Supported ),
1695 ( "spec-constr", Opt_SpecConstr, const Supported ),
1696 ( "cse", Opt_CSE, const Supported ),
1697 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1698 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1699 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1700 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1701 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1702 ( "case-merge", Opt_CaseMerge, const Supported ),
1703 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1704 ( "method-sharing", Opt_MethodSharing, const Supported ),
1705 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1706 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1707 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1708 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1709 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1710 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1711 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1712 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1713 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1714 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1715 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1716 ( "break-on-error", Opt_BreakOnError, const Supported ),
1717 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1718 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1719 ( "run-cps", Opt_RunCPS, const Supported ),
1720 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1721 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1722 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1723 ( "vectorise", Opt_Vectorise, const Supported ),
1724 ( "regs-graph", Opt_RegsGraph, const Supported ),
1725 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1726 ( "th", Opt_TemplateHaskell,
1727 deprecatedForLanguage "TemplateHaskell" ),
1728 ( "fi", Opt_ForeignFunctionInterface,
1729 deprecatedForLanguage "ForeignFunctionInterface" ),
1730 ( "ffi", Opt_ForeignFunctionInterface,
1731 deprecatedForLanguage "ForeignFunctionInterface" ),
1732 ( "arrows", Opt_Arrows,
1733 deprecatedForLanguage "Arrows" ),
1734 ( "generics", Opt_Generics,
1735 deprecatedForLanguage "Generics" ),
1736 ( "implicit-prelude", Opt_ImplicitPrelude,
1737 deprecatedForLanguage "ImplicitPrelude" ),
1738 ( "bang-patterns", Opt_BangPatterns,
1739 deprecatedForLanguage "BangPatterns" ),
1740 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1741 deprecatedForLanguage "MonomorphismRestriction" ),
1742 ( "mono-pat-binds", Opt_MonoPatBinds,
1743 deprecatedForLanguage "MonoPatBinds" ),
1744 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1745 deprecatedForLanguage "ExtendedDefaultRules" ),
1746 ( "implicit-params", Opt_ImplicitParams,
1747 deprecatedForLanguage "ImplicitParams" ),
1748 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1749 deprecatedForLanguage "ScopedTypeVariables" ),
1751 deprecatedForLanguage "PArr" ),
1752 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1753 deprecatedForLanguage "OverlappingInstances" ),
1754 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1755 deprecatedForLanguage "UndecidableInstances" ),
1756 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1757 deprecatedForLanguage "IncoherentInstances" ),
1758 ( "gen-manifest", Opt_GenManifest, const Supported ),
1759 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1760 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1761 ( "shared-implib", Opt_SharedImplib, const Supported ),
1762 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1763 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1766 supportedLanguages :: [String]
1767 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1769 -- This may contain duplicates
1770 languageOptions :: [DynFlag]
1771 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1773 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1774 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1776 ( "CPP", Opt_Cpp, const Supported ),
1777 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1778 ( "TupleSections", Opt_TupleSections, const Supported ),
1779 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1780 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1781 ( "MagicHash", Opt_MagicHash, const Supported ),
1782 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1783 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1784 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1785 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1786 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1787 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1788 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1789 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1790 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1791 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1792 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1793 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1794 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1795 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1796 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1797 ( "Arrows", Opt_Arrows, const Supported ),
1798 ( "PArr", Opt_PArr, const Supported ),
1799 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1800 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1801 ( "Generics", Opt_Generics, const Supported ),
1803 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1804 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1805 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1806 ( "RecordPuns", Opt_RecordPuns,
1807 deprecatedForLanguage "NamedFieldPuns" ),
1808 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1809 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1810 ( "GADTs", Opt_GADTs, const Supported ),
1811 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1812 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1813 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1815 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1817 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1818 -- On by default (which is not strictly H98):
1819 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1820 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1821 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1822 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1823 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1824 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1826 ( "PatternSignatures", Opt_ScopedTypeVariables,
1827 deprecatedForLanguage "ScopedTypeVariables" ),
1829 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1830 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1831 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1832 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1833 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1834 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1835 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1836 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1837 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1838 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1839 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1840 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1841 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1842 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1843 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1844 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1845 ( "PackageImports", Opt_PackageImports, const Supported ),
1846 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1849 impliedFlags :: [(DynFlag, DynFlag)]
1851 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1852 -- be completely rigid for GADTs
1854 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1855 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1856 -- all over the place
1858 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1859 -- Note [Scoped tyvars] in TcBinds
1860 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1863 glasgowExtsFlags :: [DynFlag]
1864 glasgowExtsFlags = [
1865 Opt_PrintExplicitForalls
1866 , Opt_ForeignFunctionInterface
1867 , Opt_UnliftedFFITypes
1869 , Opt_ImplicitParams
1870 , Opt_ScopedTypeVariables
1872 , Opt_TypeSynonymInstances
1873 , Opt_StandaloneDeriving
1874 , Opt_DeriveDataTypeable
1876 , Opt_DeriveFoldable
1877 , Opt_DeriveTraversable
1878 , Opt_FlexibleContexts
1879 , Opt_FlexibleInstances
1880 , Opt_ConstrainedClassMethods
1881 , Opt_MultiParamTypeClasses
1882 , Opt_FunctionalDependencies
1884 , Opt_PolymorphicComponents
1885 , Opt_ExistentialQuantification
1887 , Opt_PostfixOperators
1889 , Opt_LiberalTypeSynonyms
1893 , Opt_ParallelListComp
1894 , Opt_EmptyDataDecls
1895 , Opt_KindSignatures
1896 , Opt_GeneralizedNewtypeDeriving
1897 , Opt_TypeFamilies ]
1899 -- -----------------------------------------------------------------------------
1900 -- Parsing the dynamic flags.
1902 -- | Parse dynamic flags from a list of command line arguments. Returns the
1903 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1904 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1905 -- flags or missing arguments).
1906 parseDynamicFlags :: Monad m =>
1907 DynFlags -> [Located String]
1908 -> m (DynFlags, [Located String], [Located String])
1909 -- ^ Updated 'DynFlags', left-over arguments, and
1910 -- list of warnings.
1911 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1913 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1914 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1915 parseDynamicNoPackageFlags :: Monad m =>
1916 DynFlags -> [Located String]
1917 -> m (DynFlags, [Located String], [Located String])
1918 -- ^ Updated 'DynFlags', left-over arguments, and
1919 -- list of warnings.
1920 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1922 parseDynamicFlags_ :: Monad m =>
1923 DynFlags -> [Located String] -> Bool
1924 -> m (DynFlags, [Located String], [Located String])
1925 parseDynamicFlags_ dflags args pkg_flags = do
1926 -- XXX Legacy support code
1927 -- We used to accept things like
1928 -- optdep-f -optdepdepend
1929 -- optdep-f -optdep depend
1930 -- optdep -f -optdepdepend
1931 -- optdep -f -optdep depend
1932 -- but the spaces trip up proper argument handling. So get rid of them.
1933 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1934 f (x : xs) = x : f xs
1938 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1939 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1940 | otherwise = dynamic_flags
1942 let ((leftover, errs, warns), dflags')
1943 = runCmdLine (processArgs flag_spec args') dflags
1944 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1945 return (dflags', leftover, warns)
1947 type DynP = CmdLineP DynFlags
1949 upd :: (DynFlags -> DynFlags) -> DynP ()
1951 dfs <- getCmdLineState
1952 putCmdLineState $! (f dfs)
1954 --------------------------
1955 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1956 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1957 ; mapM_ setDynFlag deps }
1959 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1960 -- When you set f, set the ones it implies
1961 -- NB: use setDynFlag recursively, in case the implied flags
1962 -- implies further flags
1963 -- When you un-set f, however, we don't un-set the things it implies
1964 -- (except for -fno-glasgow-exts, which is treated specially)
1966 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1968 --------------------------
1969 setDumpFlag :: DynFlag -> OptKind DynP
1970 setDumpFlag dump_flag
1971 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1973 -- Certain dumpy-things are really interested in what's going
1974 -- on during recompilation checking, so in those cases we
1975 -- don't want to turn it off.
1976 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1977 Opt_D_dump_hi_diffs]
1979 forceRecompile :: DynP ()
1980 -- Whenver we -ddump, force recompilation (by switching off the
1981 -- recompilation checker), else you don't see the dump! However,
1982 -- don't switch it off in --make mode, else *everything* gets
1983 -- recompiled which probably isn't what you want
1984 forceRecompile = do { dfs <- getCmdLineState
1985 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1987 force_recomp dfs = isOneShot (ghcMode dfs)
1989 setVerboseCore2Core :: DynP ()
1990 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1992 upd (\s -> s { shouldDumpSimplPhase = const True })
1994 setDumpSimplPhases :: String -> DynP ()
1995 setDumpSimplPhases s = do forceRecompile
1996 upd (\s -> s { shouldDumpSimplPhase = spec })
1998 spec :: SimplifierMode -> Bool
2000 . map (join (&&) . map match . split ':')
2006 join :: (Bool -> Bool -> Bool)
2007 -> [SimplifierMode -> Bool]
2008 -> SimplifierMode -> Bool
2009 join _ [] = const True
2010 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2012 match :: String -> SimplifierMode -> Bool
2013 match "" = const True
2014 match s = case reads s of
2015 [(n,"")] -> phase_num n
2018 phase_num :: Int -> SimplifierMode -> Bool
2019 phase_num n (SimplPhase k _) = n == k
2020 phase_num _ _ = False
2022 phase_name :: String -> SimplifierMode -> Bool
2023 phase_name s SimplGently = s == "gentle"
2024 phase_name s (SimplPhase _ ss) = s `elem` ss
2026 setVerbosity :: Maybe Int -> DynP ()
2027 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2029 addCmdlineHCInclude :: String -> DynP ()
2030 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2032 extraPkgConf_ :: FilePath -> DynP ()
2033 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2035 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2037 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2039 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2041 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2043 setPackageName :: String -> DynFlags -> DynFlags
2045 | Nothing <- unpackPackageId pid
2046 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2048 = \s -> s{ thisPackage = pid }
2050 pid = stringToPackageId p
2052 -- If we're linking a binary, then only targets that produce object
2053 -- code are allowed (requests for other target types are ignored).
2054 setTarget :: HscTarget -> DynP ()
2055 setTarget l = upd set
2058 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2061 -- Changes the target only if we're compiling object code. This is
2062 -- used by -fasm and -fvia-C, which switch from one to the other, but
2063 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2064 -- can be safely used in an OPTIONS_GHC pragma.
2065 setObjTarget :: HscTarget -> DynP ()
2066 setObjTarget l = upd set
2069 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2072 setOptLevel :: Int -> DynFlags -> DynFlags
2073 setOptLevel n dflags
2074 | hscTarget dflags == HscInterpreted && n > 0
2076 -- not in IO any more, oh well:
2077 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2079 = updOptLevel n dflags
2082 -- -Odph is equivalent to
2084 -- -O2 optimise as much as possible
2085 -- -fno-method-sharing sharing specialisation defeats fusion
2087 -- -fdicts-cheap always inline dictionaries
2088 -- -fmax-simplifier-iterations20 this is necessary sometimes
2089 -- -fsimplifier-phases=3 we use an additional simplifier phase
2091 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2092 -- -fno-spec-constr-count SpecConstr as much as possible
2093 -- -finline-enough-args hack to prevent excessive inlining
2095 setDPHOpt :: DynFlags -> DynFlags
2096 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2098 , specConstrThreshold = Nothing
2099 , specConstrCount = Nothing
2101 `dopt_set` Opt_DictsCheap
2102 `dopt_unset` Opt_MethodSharing
2103 `dopt_set` Opt_InlineIfEnoughArgs
2105 data DPHBackend = DPHPar
2108 deriving(Eq, Ord, Enum, Show)
2110 setDPHBackend :: DPHBackend -> DynP ()
2111 setDPHBackend backend
2113 upd $ \dflags -> dflags { dphBackend = backend }
2114 mapM_ exposePackage (dph_packages backend)
2116 dph_packages DPHThis = []
2117 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2118 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2120 dphPackage :: DynFlags -> PackageId
2121 dphPackage dflags = case dphBackend dflags of
2122 DPHPar -> dphParPackageId
2123 DPHSeq -> dphSeqPackageId
2124 DPHThis -> thisPackage dflags
2126 setMainIs :: String -> DynP ()
2128 | not (null main_fn) && isLower (head main_fn)
2129 -- The arg looked like "Foo.Bar.baz"
2130 = upd $ \d -> d{ mainFunIs = Just main_fn,
2131 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2133 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2134 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2136 | otherwise -- The arg looked like "baz"
2137 = upd $ \d -> d{ mainFunIs = Just arg }
2139 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2141 -----------------------------------------------------------------------------
2142 -- Paths & Libraries
2144 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2146 -- -i on its own deletes the import paths
2147 addImportPath "" = upd (\s -> s{importPaths = []})
2148 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2152 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2155 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2157 addFrameworkPath p =
2158 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2160 #ifndef mingw32_TARGET_OS
2161 split_marker :: Char
2162 split_marker = ':' -- not configurable (ToDo)
2165 splitPathList :: String -> [String]
2166 splitPathList s = filter notNull (splitUp s)
2167 -- empty paths are ignored: there might be a trailing
2168 -- ':' in the initial list, for example. Empty paths can
2169 -- cause confusion when they are translated into -I options
2170 -- for passing to gcc.
2172 #ifndef mingw32_TARGET_OS
2173 splitUp xs = split split_marker xs
2175 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2177 -- That is, if "foo:bar:baz" is used, this interpreted as
2178 -- consisting of three entries, 'foo', 'bar', 'baz'.
2179 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2180 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2182 -- Notice that no attempt is made to fully replace the 'standard'
2183 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2184 -- that this will cause too much breakage for users & ':' will
2185 -- work fine even with DOS paths, if you're not insisting on being silly.
2188 splitUp (x:':':div:xs) | div `elem` dir_markers
2189 = ((x:':':div:p): splitUp rs)
2191 (p,rs) = findNextPath xs
2192 -- we used to check for existence of the path here, but that
2193 -- required the IO monad to be threaded through the command-line
2194 -- parser which is quite inconvenient. The
2195 splitUp xs = cons p (splitUp rs)
2197 (p,rs) = findNextPath xs
2202 -- will be called either when we've consumed nought or the
2203 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2204 -- finding the next split marker.
2206 case break (`elem` split_markers) xs of
2207 (p, _:ds) -> (p, ds)
2210 split_markers :: [Char]
2211 split_markers = [':', ';']
2213 dir_markers :: [Char]
2214 dir_markers = ['/', '\\']
2217 -- -----------------------------------------------------------------------------
2218 -- tmpDir, where we store temporary files.
2220 setTmpDir :: FilePath -> DynFlags -> DynFlags
2221 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2222 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2223 -- seem necessary now --SDM 7/2/2008
2225 -----------------------------------------------------------------------------
2228 setOptHpcDir :: String -> DynP ()
2229 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2231 -----------------------------------------------------------------------------
2232 -- Via-C compilation stuff
2234 -- There are some options that we need to pass to gcc when compiling
2235 -- Haskell code via C, but are only supported by recent versions of
2236 -- gcc. The configure script decides which of these options we need,
2237 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2238 -- read before each via-C compilation. The advantage of having these
2239 -- in a separate file is that the file can be created at install-time
2240 -- depending on the available gcc version, and even re-generated later
2241 -- if gcc is upgraded.
2243 -- The options below are not dependent on the version of gcc, only the
2246 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2247 [String]) -- for registerised HC compilations
2248 machdepCCOpts _dflags
2249 #if alpha_TARGET_ARCH
2251 #ifdef HAVE_THREADED_RTS_SUPPORT
2255 -- For now, to suppress the gcc warning "call-clobbered
2256 -- register used for global register variable", we simply
2257 -- disable all warnings altogether using the -w flag. Oh well.
2259 #elif hppa_TARGET_ARCH
2260 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2261 -- (very nice, but too bad the HP /usr/include files don't agree.)
2262 = ( ["-D_HPUX_SOURCE"], [] )
2264 #elif m68k_TARGET_ARCH
2265 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2266 -- popping of args to routines to be explicit; if we let things
2267 -- be deferred 'til after an STGJUMP, imminent death is certain!
2269 -- -fomit-frame-pointer : *don't*
2270 -- It's better to have a6 completely tied up being a frame pointer
2271 -- rather than let GCC pick random things to do with it.
2272 -- (If we want to steal a6, then we would try to do things
2273 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2274 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2276 #elif i386_TARGET_ARCH
2277 -- -fno-defer-pop : basically the same game as for m68k
2279 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2280 -- the fp (%ebp) for our register maps.
2281 = let n_regs = stolen_x86_regs _dflags
2284 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2287 "-fomit-frame-pointer",
2288 -- we want -fno-builtin, because when gcc inlines
2289 -- built-in functions like memcpy() it tends to
2290 -- run out of registers, requiring -monly-n-regs
2292 "-DSTOLEN_X86_REGS="++show n_regs ]
2295 #elif ia64_TARGET_ARCH
2296 = ( [], ["-fomit-frame-pointer", "-G0"] )
2298 #elif x86_64_TARGET_ARCH
2300 #if darwin_TARGET_OS
2305 ["-fomit-frame-pointer",
2306 "-fno-asynchronous-unwind-tables",
2307 -- the unwind tables are unnecessary for HC code,
2308 -- and get in the way of -split-objs. Another option
2309 -- would be to throw them away in the mangler, but this
2312 -- calling builtins like strlen() using the FFI can
2313 -- cause gcc to run out of regs, so use the external
2317 #elif sparc_TARGET_ARCH
2319 -- For now, to suppress the gcc warning "call-clobbered
2320 -- register used for global register variable", we simply
2321 -- disable all warnings altogether using the -w flag. Oh well.
2323 #elif powerpc_apple_darwin_TARGET
2325 -- Disable Apple's precompiling preprocessor. It's a great thing
2326 -- for "normal" programs, but it doesn't support register variable
2328 = ( [], ["-no-cpp-precomp"] )
2333 picCCOpts :: DynFlags -> [String]
2335 #if darwin_TARGET_OS
2336 -- Apple prefers to do things the other way round.
2337 -- PIC is on by default.
2338 -- -mdynamic-no-pic:
2339 -- Turn off PIC code generation.
2341 -- Don't generate "common" symbols - these are unwanted
2342 -- in dynamic libraries.
2345 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2347 = ["-mdynamic-no-pic"]
2348 #elif mingw32_TARGET_OS
2349 -- no -fPIC for Windows
2351 = ["-U __PIC__","-D__PIC__"]
2355 | opt_PIC || not opt_Static
2356 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2361 -- -----------------------------------------------------------------------------
2365 can_split = cSplitObjs == "YES"
2367 -- -----------------------------------------------------------------------------
2370 data Printable = String String
2371 | FromDynFlags (DynFlags -> String)
2373 compilerInfo :: [(String, Printable)]
2374 compilerInfo = [("Project name", String cProjectName),
2375 ("Project version", String cProjectVersion),
2376 ("Booter version", String cBooterVersion),
2377 ("Stage", String cStage),
2378 ("Have interpreter", String cGhcWithInterpreter),
2379 ("Object splitting", String cSplitObjs),
2380 ("Have native code generator", String cGhcWithNativeCodeGen),
2381 ("Support SMP", String cGhcWithSMP),
2382 ("Unregisterised", String cGhcUnregisterised),
2383 ("Tables next to code", String cGhcEnableTablesNextToCode),
2384 ("Win32 DLLs", String cEnableWin32DLLs),
2385 ("RTS ways", String cGhcRTSWays),
2386 ("Leading underscore", String cLeadingUnderscore),
2387 ("Debug on", String (show debugIsOn)),
2388 ("LibDir", FromDynFlags topDir)