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_GHCForeignImportPrim
207 | Opt_PArr -- Syntactic support for parallel arrays
208 | Opt_Arrows -- Arrow-notation syntax
209 | Opt_TemplateHaskell
212 | Opt_Generics -- "Derivable type classes"
213 | Opt_ImplicitPrelude
214 | Opt_ScopedTypeVariables
218 | Opt_OverloadedStrings
219 | Opt_DisambiguateRecordFields
220 | Opt_RecordWildCards
226 | Opt_StandaloneDeriving
227 | Opt_DeriveDataTypeable
229 | Opt_DeriveTraversable
232 | Opt_TypeSynonymInstances
233 | Opt_FlexibleContexts
234 | Opt_FlexibleInstances
235 | Opt_ConstrainedClassMethods
236 | Opt_MultiParamTypeClasses
237 | Opt_FunctionalDependencies
239 | Opt_PolymorphicComponents
240 | Opt_ExistentialQuantification
244 | Opt_ParallelListComp
245 | Opt_TransformListComp
246 | Opt_GeneralizedNewtypeDeriving
248 | Opt_PostfixOperators
250 | Opt_LiberalTypeSynonyms
253 | Opt_ImpredicativeTypes
256 | Opt_NewQualifiedOperators
258 | Opt_PrintExplicitForalls
263 | Opt_StaticArgumentTransformation
267 | Opt_IgnoreInterfacePragmas
268 | Opt_OmitInterfacePragmas
269 | Opt_DoLambdaEtaExpansion
273 | Opt_UnboxStrictFields
276 | Opt_InlineIfEnoughArgs
277 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
279 | Opt_RegsGraph -- do graph coloring register allocation
280 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
283 | Opt_AutoSccsOnAllToplevs
284 | Opt_AutoSccsOnExportedToplevs
285 | Opt_AutoSccsOnIndividualCafs
293 | Opt_ExcessPrecision
294 | Opt_EagerBlackHoling
295 | Opt_ReadUserPackageConf
299 | Opt_HideAllPackages
300 | Opt_PrintBindResult
304 | Opt_BreakOnException
306 | Opt_PrintEvldWithShow
307 | Opt_PrintBindContents
314 | Opt_ConvertToZipCfgAndBack
315 | Opt_AutoLinkPackages
316 | Opt_ImplicitImportQualified
325 | Opt_KeepRawTokenStream
329 -- | Contains not only a collection of 'DynFlag's but also a plethora of
330 -- information relating to the compilation of a single file or GHC session
331 data DynFlags = DynFlags {
334 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
335 stgToDo :: Maybe [StgToDo], -- similarly
336 hscTarget :: HscTarget,
337 hscOutName :: String, -- ^ Name of the output file
338 extCoreName :: String, -- ^ Name of the .hcr output file
339 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
340 optLevel :: Int, -- ^ Optimisation level
341 simplPhases :: Int, -- ^ Number of simplifier phases
342 maxSimplIterations :: Int, -- ^ Max simplifier iterations
343 shouldDumpSimplPhase :: SimplifierMode -> Bool,
344 ruleCheck :: Maybe String,
346 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
347 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
348 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
350 #ifndef OMIT_NATIVE_CODEGEN
351 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
353 stolen_x86_regs :: Int,
354 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
355 importPaths :: [FilePath],
357 mainFunIs :: Maybe String,
358 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
360 dphBackend :: DPHBackend,
362 thisPackage :: PackageId, -- ^ name of package currently being compiled
365 wayNames :: [WayName], -- ^ Way flags from the command line
366 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
367 rtsBuildTag :: String, -- ^ The RTS \"way\"
369 -- For object splitting
370 splitInfo :: Maybe (String,Int),
373 objectDir :: Maybe String,
374 hiDir :: Maybe String,
375 stubDir :: Maybe String,
381 outputFile :: Maybe String,
382 outputHi :: Maybe String,
383 dynLibLoader :: DynLibLoader,
385 -- | This is set by 'DriverPipeline.runPipeline' based on where
386 -- its output is going.
387 dumpPrefix :: Maybe FilePath,
389 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
390 -- Set by @-ddump-file-prefix@
391 dumpPrefixForce :: Maybe FilePath,
393 includePaths :: [String],
394 libraryPaths :: [String],
395 frameworkPaths :: [String], -- used on darwin only
396 cmdlineFrameworks :: [String], -- ditto
397 tmpDir :: String, -- no trailing '/'
399 ghcUsagePath :: FilePath, -- Filled in by SysTools
400 ghciUsagePath :: FilePath, -- ditto
402 hpcDir :: String, -- ^ Path to store the .mix files
404 -- options for particular phases
412 opt_windres :: [String],
414 -- commands for particular phases
416 pgm_P :: (String,[Option]),
418 pgm_c :: (String,[Option]),
419 pgm_m :: (String,[Option]),
420 pgm_s :: (String,[Option]),
421 pgm_a :: (String,[Option]),
422 pgm_l :: (String,[Option]),
423 pgm_dll :: (String,[Option]),
425 pgm_sysman :: String,
426 pgm_windres :: String,
429 depMakefile :: FilePath,
430 depIncludePkgDeps :: Bool,
431 depExcludeMods :: [ModuleName],
432 depSuffixes :: [String],
435 extraPkgConfs :: [FilePath],
436 topDir :: FilePath, -- filled in by SysTools
437 systemPackageConfig :: FilePath, -- ditto
438 -- ^ The @-package-conf@ flags given on the command line, in the order
441 packageFlags :: [PackageFlag],
442 -- ^ The @-package@ and @-hide-package@ flags from the command-line
445 -- NB. do not modify this field, it is calculated by
446 -- Packages.initPackages and Packages.updatePackages.
447 pkgDatabase :: Maybe (UniqFM PackageConfig),
448 pkgState :: PackageState,
451 -- These have to be IORefs, because the defaultCleanupHandler needs to
452 -- know what to clean when an exception happens
453 filesToClean :: IORef [FilePath],
454 dirsToClean :: IORef (FiniteMap FilePath FilePath),
459 -- | Message output action: use "ErrUtils" instead of this if you can
460 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
462 haddockOptions :: Maybe String
465 -- | The target code type of the compilation (if any).
467 -- Whenever you change the target, also make sure to set 'ghcLink' to
468 -- something sensible.
470 -- 'HscNothing' can be used to avoid generating any output, however, note
473 -- * This will not run the desugaring step, thus no warnings generated in
474 -- this step will be output. In particular, this includes warnings related
475 -- to pattern matching. You can run the desugarer manually using
476 -- 'GHC.desugarModule'.
478 -- * If a program uses Template Haskell the typechecker may try to run code
479 -- from an imported module. This will fail if no code has been generated
480 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
481 -- whether this might be the case and choose to either switch to a
482 -- different target or avoid typechecking such modules. (The latter may
483 -- preferable for security reasons.)
486 = HscC -- ^ Generate C code.
487 | HscAsm -- ^ Generate assembly using the native code generator.
488 | HscJava -- ^ Generate Java bytecode.
489 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
490 | HscNothing -- ^ Don't generate any code. See notes above.
493 -- | Will this target result in an object file on the disk?
494 isObjectTarget :: HscTarget -> Bool
495 isObjectTarget HscC = True
496 isObjectTarget HscAsm = True
497 isObjectTarget _ = False
499 -- | The 'GhcMode' tells us whether we're doing multi-module
500 -- compilation (controlled via the "GHC" API) or one-shot
501 -- (single-module) compilation. This makes a difference primarily to
502 -- the "Finder": in one-shot mode we look for interface files for
503 -- imported modules, but in multi-module mode we look for source files
504 -- in order to check whether they need to be recompiled.
506 = CompManager -- ^ @\-\-make@, GHCi, etc.
507 | OneShot -- ^ @ghc -c Foo.hs@
508 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
511 instance Outputable GhcMode where
512 ppr CompManager = ptext (sLit "CompManager")
513 ppr OneShot = ptext (sLit "OneShot")
514 ppr MkDepend = ptext (sLit "MkDepend")
516 isOneShot :: GhcMode -> Bool
517 isOneShot OneShot = True
518 isOneShot _other = False
520 -- | What to do in the link step, if there is one.
522 = NoLink -- ^ Don't link at all
523 | LinkBinary -- ^ Link object code into a binary
524 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
525 -- bytecode and object code).
526 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
529 isNoLink :: GhcLink -> Bool
530 isNoLink NoLink = True
533 -- Is it worth evaluating this Bool and caching it in the DynFlags value
534 -- during initDynFlags?
535 doingTickyProfiling :: DynFlags -> Bool
536 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
539 = ExposePackage String
541 | IgnorePackage String
544 defaultHscTarget :: HscTarget
545 defaultHscTarget = defaultObjectTarget
547 -- | The 'HscTarget' value corresponding to the default way to create
548 -- object files on the current platform.
549 defaultObjectTarget :: HscTarget
551 | cGhcWithNativeCodeGen == "YES" = HscAsm
556 | Wrapped (Maybe String)
560 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
561 initDynFlags :: DynFlags -> IO DynFlags
562 initDynFlags dflags = do
563 -- someday these will be dynamic flags
564 ways <- readIORef v_Ways
565 build_tag <- readIORef v_Build_tag
566 rts_build_tag <- readIORef v_RTS_Build_tag
567 refFilesToClean <- newIORef []
568 refDirsToClean <- newIORef emptyFM
571 buildTag = build_tag,
572 rtsBuildTag = rts_build_tag,
573 filesToClean = refFilesToClean,
574 dirsToClean = refDirsToClean
577 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
578 -- and must be fully initialized by 'GHC.newSession' first.
579 defaultDynFlags :: DynFlags
582 ghcMode = CompManager,
583 ghcLink = LinkBinary,
586 hscTarget = defaultHscTarget,
592 maxSimplIterations = 4,
593 shouldDumpSimplPhase = const False,
595 specConstrThreshold = Just 200,
596 specConstrCount = Just 3,
597 liberateCaseThreshold = Just 200,
598 #ifndef OMIT_NATIVE_CODEGEN
599 targetPlatform = defaultTargetPlatform,
602 cmdlineHcIncludes = [],
606 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
610 thisPackage = mainPackageId,
616 objectSuf = phaseInputExt StopLn,
617 hcSuf = phaseInputExt HCc,
620 outputFile = Nothing,
622 dynLibLoader = SystemDependent,
623 dumpPrefix = Nothing,
624 dumpPrefixForce = Nothing,
628 cmdlineFrameworks = [],
629 tmpDir = cDEFAULT_TMPDIR,
635 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
646 pkgDatabase = Nothing,
647 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
648 wayNames = panic "defaultDynFlags: No wayNames",
649 buildTag = panic "defaultDynFlags: No buildTag",
650 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
652 -- initSysTools fills all these in
653 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
654 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
655 topDir = panic "defaultDynFlags: No topDir",
656 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
657 pgm_L = panic "defaultDynFlags: No pgm_L",
658 pgm_P = panic "defaultDynFlags: No pgm_P",
659 pgm_F = panic "defaultDynFlags: No pgm_F",
660 pgm_c = panic "defaultDynFlags: No pgm_c",
661 pgm_m = panic "defaultDynFlags: No pgm_m",
662 pgm_s = panic "defaultDynFlags: No pgm_s",
663 pgm_a = panic "defaultDynFlags: No pgm_a",
664 pgm_l = panic "defaultDynFlags: No pgm_l",
665 pgm_dll = panic "defaultDynFlags: No pgm_dll",
666 pgm_T = panic "defaultDynFlags: No pgm_T",
667 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
668 pgm_windres = panic "defaultDynFlags: No pgm_windres",
669 -- end of initSysTools values
671 depMakefile = "Makefile",
672 depIncludePkgDeps = False,
675 -- end of ghc -M values
676 filesToClean = panic "defaultDynFlags: No filesToClean",
677 dirsToClean = panic "defaultDynFlags: No dirsToClean",
678 haddockOptions = Nothing,
680 Opt_AutoLinkPackages,
681 Opt_ReadUserPackageConf,
683 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
684 -- behaviour the default, to see if anyone notices
688 Opt_MonomorphismRestriction,
696 Opt_PrintBindContents
698 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
699 -- The default -O0 options
702 log_action = \severity srcSpan style msg ->
704 SevInfo -> printErrs (msg style)
705 SevFatal -> printErrs (msg style)
708 printErrs ((mkLocMessage srcSpan msg) style)
709 -- careful (#2302): printErrs prints in UTF-8, whereas
710 -- converting to string first and using hPutStr would
711 -- just emit the low 8 bits of each unicode char.
718 0 | print errors & warnings only
719 1 | minimal verbosity: print "compiling M ... done." for each module.
720 2 | equivalent to -dshow-passes
721 3 | equivalent to existing "ghc -v"
722 4 | "ghc -v -ddump-most"
723 5 | "ghc -v -ddump-all"
726 -- | Test whether a 'DynFlag' is set
727 dopt :: DynFlag -> DynFlags -> Bool
728 dopt f dflags = f `elem` (flags dflags)
731 dopt_set :: DynFlags -> DynFlag -> DynFlags
732 dopt_set dfs f = dfs{ flags = f : flags dfs }
734 -- | Unset a 'DynFlag'
735 dopt_unset :: DynFlags -> DynFlag -> DynFlags
736 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
738 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
739 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
740 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
741 -> [a] -- ^ Correctly ordered extracted options
742 getOpts dflags opts = reverse (opts dflags)
743 -- We add to the options from the front, so we need to reverse the list
745 -- | Gets the verbosity flag for the current verbosity level. This is fed to
746 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
747 getVerbFlag :: DynFlags -> String
749 | verbosity dflags >= 3 = "-v"
752 setObjectDir, setHiDir, setStubDir, setOutputDir,
753 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
754 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
755 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
756 addCmdlineFramework, addHaddockOpts
757 :: String -> DynFlags -> DynFlags
758 setOutputFile, setOutputHi, setDumpPrefixForce
759 :: Maybe String -> DynFlags -> DynFlags
761 setObjectDir f d = d{ objectDir = Just f}
762 setHiDir f d = d{ hiDir = Just f}
763 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
764 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
765 -- \#included from the .hc file when compiling with -fvia-C.
766 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
768 setObjectSuf f d = d{ objectSuf = f}
769 setHiSuf f d = d{ hiSuf = f}
770 setHcSuf f d = d{ hcSuf = f}
772 setOutputFile f d = d{ outputFile = f}
773 setOutputHi f d = d{ outputHi = f}
775 parseDynLibLoaderMode f d =
777 ("deploy", "") -> d{ dynLibLoader = Deployable }
778 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
779 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
780 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
781 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
782 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
784 setDumpPrefixForce f d = d { dumpPrefixForce = f}
786 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
787 -- Config.hs should really use Option.
788 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
790 setPgmL f d = d{ pgm_L = f}
791 setPgmF f d = d{ pgm_F = f}
792 setPgmc f d = d{ pgm_c = (f,[])}
793 setPgmm f d = d{ pgm_m = (f,[])}
794 setPgms f d = d{ pgm_s = (f,[])}
795 setPgma f d = d{ pgm_a = (f,[])}
796 setPgml f d = d{ pgm_l = (f,[])}
797 setPgmdll f d = d{ pgm_dll = (f,[])}
798 setPgmwindres f d = d{ pgm_windres = f}
800 addOptL f d = d{ opt_L = f : opt_L d}
801 addOptP f d = d{ opt_P = f : opt_P d}
802 addOptF f d = d{ opt_F = f : opt_F d}
803 addOptc f d = d{ opt_c = f : opt_c d}
804 addOptm f d = d{ opt_m = f : opt_m d}
805 addOpta f d = d{ opt_a = f : opt_a d}
806 addOptl f d = d{ opt_l = f : opt_l d}
807 addOptwindres f d = d{ opt_windres = f : opt_windres d}
809 setDepMakefile :: FilePath -> DynFlags -> DynFlags
810 setDepMakefile f d = d { depMakefile = deOptDep f }
812 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
813 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
815 addDepExcludeMod :: String -> DynFlags -> DynFlags
817 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
819 addDepSuffix :: FilePath -> DynFlags -> DynFlags
820 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
823 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
824 -- we need to strip the "-optdep" off of the arg
825 deOptDep :: String -> String
826 deOptDep x = case maybePrefixMatch "-optdep" x of
830 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
832 addHaddockOpts f d = d{ haddockOptions = Just f}
834 -- -----------------------------------------------------------------------------
835 -- Command-line options
837 -- | When invoking external tools as part of the compilation pipeline, we
838 -- pass these a sequence of options on the command-line. Rather than
839 -- just using a list of Strings, we use a type that allows us to distinguish
840 -- between filepaths and 'other stuff'. The reason for this is that
841 -- this type gives us a handle on transforming filenames, and filenames only,
842 -- to whatever format they're expected to be on a particular platform.
844 = FileOption -- an entry that _contains_ filename(s) / filepaths.
845 String -- a non-filepath prefix that shouldn't be
846 -- transformed (e.g., "/out=")
847 String -- the filepath/filename portion
850 -----------------------------------------------------------------------------
851 -- Setting the optimisation level
853 updOptLevel :: Int -> DynFlags -> DynFlags
854 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
856 = dfs2{ optLevel = final_n }
858 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
859 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
860 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
862 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
863 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
865 optLevelFlags :: [([Int], DynFlag)]
867 = [ ([0], Opt_IgnoreInterfacePragmas)
868 , ([0], Opt_OmitInterfacePragmas)
870 , ([1,2], Opt_IgnoreAsserts)
871 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
873 , ([1,2], Opt_DoEtaReduction)
874 , ([1,2], Opt_CaseMerge)
875 , ([1,2], Opt_Strictness)
877 , ([1,2], Opt_FullLaziness)
879 , ([2], Opt_LiberateCase)
880 , ([2], Opt_SpecConstr)
882 -- , ([2], Opt_StaticArgumentTransformation)
883 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
884 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
885 -- several improvements to the heuristics, and I'm concerned that without
886 -- those changes SAT will interfere with some attempts to write "high
887 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
888 -- this year. In particular, the version in HEAD lacks the tail call
889 -- criterion, so many things that look like reasonable loops will be
890 -- turned into functions with extra (unneccesary) thunk creation.
892 , ([0,1,2], Opt_DoLambdaEtaExpansion)
893 -- This one is important for a tiresome reason:
894 -- we want to make sure that the bindings for data
895 -- constructors are eta-expanded. This is probably
896 -- a good thing anyway, but it seems fragile.
899 -- -----------------------------------------------------------------------------
900 -- Standard sets of warning options
902 standardWarnings :: [DynFlag]
904 = [ Opt_WarnWarningsDeprecations,
905 Opt_WarnDeprecatedFlags,
906 Opt_WarnUnrecognisedPragmas,
907 Opt_WarnOverlappingPatterns,
908 Opt_WarnMissingFields,
909 Opt_WarnMissingMethods,
910 Opt_WarnDuplicateExports,
911 Opt_WarnLazyUnliftedBindings,
912 Opt_WarnDodgyForeignImports
915 minusWOpts :: [DynFlag]
917 = standardWarnings ++
918 [ Opt_WarnUnusedBinds,
919 Opt_WarnUnusedMatches,
920 Opt_WarnUnusedImports,
921 Opt_WarnIncompletePatterns,
925 minusWallOpts :: [DynFlag]
928 [ Opt_WarnTypeDefaults,
929 Opt_WarnNameShadowing,
935 -- minuswRemovesOpts should be every warning option
936 minuswRemovesOpts :: [DynFlag]
939 [Opt_WarnImplicitPrelude,
940 Opt_WarnIncompletePatternsRecUpd,
941 Opt_WarnSimplePatterns,
942 Opt_WarnMonomorphism,
943 Opt_WarnUnrecognisedPragmas,
947 -- -----------------------------------------------------------------------------
948 -- CoreToDo: abstraction of core-to-core passes to run.
950 data CoreToDo -- These are diff core-to-core passes,
951 -- which may be invoked in any order,
952 -- as many times as you like.
954 = CoreDoSimplify -- The core-to-core simplifier.
957 -- Each run of the simplifier can take a different
958 -- set of simplifier-specific flags.
960 | CoreDoFloatOutwards FloatOutSwitches
965 | CoreDoWorkerWrapper
968 | CoreDoOldStrictness
971 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
972 -- matching this string
973 | CoreDoVectorisation PackageId
974 | CoreDoNothing -- Useful when building up
975 | CoreDoPasses [CoreToDo] -- lists of these things
978 data SimplifierMode -- See comments in SimplMonad
980 | SimplPhase Int [String]
982 instance Outputable SimplifierMode where
983 ppr SimplGently = ptext (sLit "gentle")
984 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
987 data SimplifierSwitch
988 = MaxSimplifierIterations Int
992 data FloatOutSwitches = FloatOutSwitches {
993 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
994 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
995 -- even if they do not escape a lambda
998 instance Outputable FloatOutSwitches where
999 ppr = pprFloatOutSwitches
1001 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1002 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1003 <+> pp_not (floatOutConstants sw) <+> text "constants"
1006 pp_not False = text "not"
1008 -- | Switches that specify the minimum amount of floating out
1009 -- gentleFloatOutSwitches :: FloatOutSwitches
1010 -- gentleFloatOutSwitches = FloatOutSwitches False False
1012 -- | Switches that do not specify floating out of lambdas, just of constants
1013 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1014 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1017 -- The core-to-core pass ordering is derived from the DynFlags:
1018 runWhen :: Bool -> CoreToDo -> CoreToDo
1019 runWhen True do_this = do_this
1020 runWhen False _ = CoreDoNothing
1022 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1023 runMaybe (Just x) f = f x
1024 runMaybe Nothing _ = CoreDoNothing
1026 getCoreToDo :: DynFlags -> [CoreToDo]
1028 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1029 | otherwise = core_todo
1031 opt_level = optLevel dflags
1032 phases = simplPhases dflags
1033 max_iter = maxSimplIterations dflags
1034 strictness = dopt Opt_Strictness dflags
1035 full_laziness = dopt Opt_FullLaziness dflags
1036 cse = dopt Opt_CSE dflags
1037 spec_constr = dopt Opt_SpecConstr dflags
1038 liberate_case = dopt Opt_LiberateCase dflags
1039 rule_check = ruleCheck dflags
1040 static_args = dopt Opt_StaticArgumentTransformation dflags
1042 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1044 simpl_phase phase names iter
1046 [ CoreDoSimplify (SimplPhase phase names) [
1047 MaxSimplifierIterations iter
1049 maybe_rule_check phase
1053 = runWhen (dopt Opt_Vectorise dflags)
1054 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1057 -- By default, we have 2 phases before phase 0.
1059 -- Want to run with inline phase 2 after the specialiser to give
1060 -- maximum chance for fusion to work before we inline build/augment
1061 -- in phase 1. This made a difference in 'ansi' where an
1062 -- overloaded function wasn't inlined till too late.
1064 -- Need phase 1 so that build/augment get
1065 -- inlined. I found that spectral/hartel/genfft lost some useful
1066 -- strictness in the function sumcode' if augment is not inlined
1067 -- before strictness analysis runs
1068 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1069 | phase <- [phases, phases-1 .. 1] ]
1072 -- initial simplify: mk specialiser happy: minimum effort please
1073 simpl_gently = CoreDoSimplify SimplGently [
1074 -- Simplify "gently"
1075 -- Don't inline anything till full laziness has bitten
1076 -- In particular, inlining wrappers inhibits floating
1077 -- e.g. ...(case f x of ...)...
1078 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1079 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1080 -- and now the redex (f x) isn't floatable any more
1081 -- Similarly, don't apply any rules until after full
1082 -- laziness. Notably, list fusion can prevent floating.
1084 NoCaseOfCase, -- Don't do case-of-case transformations.
1085 -- This makes full laziness work better
1086 MaxSimplifierIterations max_iter
1090 if opt_level == 0 then
1092 simpl_phase 0 ["final"] max_iter]
1093 else {- opt_level >= 1 -} [
1095 -- We want to do the static argument transform before full laziness as it
1096 -- may expose extra opportunities to float things outwards. However, to fix
1097 -- up the output of the transformation we need at do at least one simplify
1098 -- after this before anything else
1099 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1101 -- We run vectorisation here for now, but we might also try to run
1105 -- initial simplify: mk specialiser happy: minimum effort please
1108 -- Specialisation is best done before full laziness
1109 -- so that overloaded functions have all their dictionary lambdas manifest
1112 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1113 -- Was: gentleFloatOutSwitches
1114 -- I have no idea why, but not floating constants to top level is
1115 -- very bad in some cases.
1116 -- Notably: p_ident in spectral/rewrite
1117 -- Changing from "gentle" to "constantsOnly" improved
1118 -- rewrite's allocation by 19%, and made 0.0% difference
1119 -- to any other nofib benchmark
1125 -- Phase 0: allow all Ids to be inlined now
1126 -- This gets foldr inlined before strictness analysis
1128 -- At least 3 iterations because otherwise we land up with
1129 -- huge dead expressions because of an infelicity in the
1131 -- let k = BIG in foldr k z xs
1132 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1133 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1135 simpl_phase 0 ["main"] (max max_iter 3),
1138 #ifdef OLD_STRICTNESS
1139 CoreDoOldStrictness,
1141 runWhen strictness (CoreDoPasses [
1143 CoreDoWorkerWrapper,
1145 simpl_phase 0 ["post-worker-wrapper"] max_iter
1148 runWhen full_laziness
1149 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1150 -- nofib/spectral/hartel/wang doubles in speed if you
1151 -- do full laziness late in the day. It only happens
1152 -- after fusion and other stuff, so the early pass doesn't
1153 -- catch it. For the record, the redex is
1154 -- f_el22 (f_el21 r_midblock)
1157 runWhen cse CoreCSE,
1158 -- We want CSE to follow the final full-laziness pass, because it may
1159 -- succeed in commoning up things floated out by full laziness.
1160 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1166 -- Case-liberation for -O2. This should be after
1167 -- strictness analysis and the simplification which follows it.
1168 runWhen liberate_case (CoreDoPasses [
1170 simpl_phase 0 ["post-liberate-case"] max_iter
1171 ]), -- Run the simplifier after LiberateCase to vastly
1172 -- reduce the possiblility of shadowing
1173 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1175 runWhen spec_constr CoreDoSpecConstr,
1179 -- Final clean-up simplification:
1180 simpl_phase 0 ["final"] max_iter
1183 -- -----------------------------------------------------------------------------
1184 -- StgToDo: abstraction of stg-to-stg passes to run.
1187 = StgDoMassageForProfiling -- should be (next to) last
1188 -- There's also setStgVarInfo, but its absolute "lastness"
1189 -- is so critical that it is hardwired in (no flag).
1192 getStgToDo :: DynFlags -> [StgToDo]
1194 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1197 stg_stats = dopt Opt_StgStats dflags
1199 todo1 = if stg_stats then [D_stg_stats] else []
1201 todo2 | WayProf `elem` wayNames dflags
1202 = StgDoMassageForProfiling : todo1
1206 -- -----------------------------------------------------------------------------
1209 allFlags :: [String]
1210 allFlags = map ('-':) $
1211 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1212 map ("fno-"++) flags ++
1213 map ("f"++) flags ++
1214 map ("X"++) supportedLanguages ++
1215 map ("XNo"++) supportedLanguages
1216 where ok (PrefixPred _ _) = False
1218 flags = [ name | (name, _, _) <- fFlags ]
1220 dynamic_flags :: [Flag DynP]
1222 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1223 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1224 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1225 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1226 , Flag "v" (OptIntSuffix setVerbosity) Supported
1228 ------- Specific phases --------------------------------------------
1229 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1230 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1231 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1232 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1233 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1234 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1235 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1236 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1237 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1238 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1240 , Flag "optL" (HasArg (upd . addOptL)) Supported
1241 , Flag "optP" (HasArg (upd . addOptP)) Supported
1242 , Flag "optF" (HasArg (upd . addOptF)) Supported
1243 , Flag "optc" (HasArg (upd . addOptc)) Supported
1244 , Flag "optm" (HasArg (upd . addOptm)) Supported
1245 , Flag "opta" (HasArg (upd . addOpta)) Supported
1246 , Flag "optl" (HasArg (upd . addOptl)) Supported
1247 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1250 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1253 -------- ghc -M -----------------------------------------------------
1254 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1255 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1256 (Deprecated "Use -dep-suffix instead")
1257 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1258 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1259 (Deprecated "Use -dep-makefile instead")
1260 , Flag "optdep-w" (NoArg (return ()))
1261 (Deprecated "-optdep-w doesn't do anything")
1262 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1263 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1264 (Deprecated "Use -include-pkg-deps instead")
1265 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1266 (Deprecated "Use -include-pkg-deps instead")
1267 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1268 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1269 (Deprecated "Use -exclude-module instead")
1270 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1271 (Deprecated "Use -exclude-module instead")
1273 -------- Linking ----------------------------------------------------
1274 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1276 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1277 (Deprecated "Use -c instead")
1278 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1280 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1283 ------- Libraries ---------------------------------------------------
1284 , Flag "L" (Prefix addLibraryPath ) Supported
1285 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1287 ------- Frameworks --------------------------------------------------
1288 -- -framework-path should really be -F ...
1289 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1290 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1292 ------- Output Redirection ------------------------------------------
1293 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1294 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1295 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1296 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1297 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1298 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1299 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1300 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1301 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1302 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1303 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1306 ------- Keeping temporary files -------------------------------------
1307 -- These can be singular (think ghc -c) or plural (think ghc --make)
1308 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1309 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1310 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1311 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1312 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1313 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1314 -- This only makes sense as plural
1315 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1317 ------- Miscellaneous ----------------------------------------------
1318 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1319 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1320 , Flag "main-is" (SepArg setMainIs ) Supported
1321 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1322 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1323 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1325 ------- recompilation checker --------------------------------------
1326 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1327 (Deprecated "Use -fno-force-recomp instead")
1328 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1329 (Deprecated "Use -fforce-recomp instead")
1331 ------ HsCpp opts ---------------------------------------------------
1332 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1333 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1335 ------- Include/Import Paths ----------------------------------------
1336 , Flag "I" (Prefix addIncludePath) Supported
1337 , Flag "i" (OptPrefix addImportPath ) Supported
1339 ------ Debugging ----------------------------------------------------
1340 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1342 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1344 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1346 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1348 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1350 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1352 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1354 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1356 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1358 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1360 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1362 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1364 , Flag "ddump-asm-regalloc-stages"
1365 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1367 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1369 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1371 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1373 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1375 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1377 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1379 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1381 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1383 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1385 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1387 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1389 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1391 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1393 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1395 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1397 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1399 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1401 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1403 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1405 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1407 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1409 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1411 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1413 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1415 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1417 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1419 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1421 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1423 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1425 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1427 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1429 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1431 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1433 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1435 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1437 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1439 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1441 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1443 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1445 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1447 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1449 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1451 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1453 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1456 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1458 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1460 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1462 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1464 , Flag "dshow-passes"
1465 (NoArg (do forceRecompile
1466 setVerbosity (Just 2)))
1468 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1471 ------ Machine dependant (-m<blah>) stuff ---------------------------
1473 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1475 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1477 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1480 ------ Warning opts -------------------------------------------------
1481 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1483 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1485 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1487 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1489 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1490 (Deprecated "Use -w instead")
1491 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1494 ------ Optimisation flags ------------------------------------------
1495 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1496 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1497 (Deprecated "Use -O0 instead")
1498 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1499 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1501 -- If the number is missing, use 1
1503 , Flag "fsimplifier-phases"
1504 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1506 , Flag "fmax-simplifier-iterations"
1507 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1510 , Flag "fspec-constr-threshold"
1511 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1513 , Flag "fno-spec-constr-threshold"
1514 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1516 , Flag "fspec-constr-count"
1517 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1519 , Flag "fno-spec-constr-count"
1520 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1522 , Flag "fliberate-case-threshold"
1523 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1525 , Flag "fno-liberate-case-threshold"
1526 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1529 , Flag "frule-check"
1530 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1532 , Flag "fcontext-stack"
1533 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1536 ------ Profiling ----------------------------------------------------
1538 -- XXX Should the -f* flags be deprecated?
1539 -- They don't seem to be documented
1540 , Flag "fauto-sccs-on-all-toplevs"
1541 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1544 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1546 , Flag "no-auto-all"
1547 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1549 , Flag "fauto-sccs-on-exported-toplevs"
1550 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1553 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1556 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1558 , Flag "fauto-sccs-on-individual-cafs"
1559 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1562 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1565 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1568 ------ DPH flags ----------------------------------------------------
1571 (NoArg (setDPHBackend DPHSeq))
1574 (NoArg (setDPHBackend DPHPar))
1577 (NoArg (setDPHBackend DPHThis))
1580 ------ Compiler flags -----------------------------------------------
1582 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1583 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1584 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1586 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1587 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1588 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1590 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1592 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1595 ++ map (mkFlag True "f" setDynFlag ) fFlags
1596 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1597 ++ map (mkFlag True "X" setDynFlag ) xFlags
1598 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1600 package_flags :: [Flag DynP]
1602 ------- Packages ----------------------------------------------------
1603 Flag "package-conf" (HasArg extraPkgConf_) Supported
1604 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1606 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1607 , Flag "package" (HasArg exposePackage) Supported
1608 , Flag "hide-package" (HasArg hidePackage) Supported
1609 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1611 , Flag "ignore-package" (HasArg ignorePackage)
1613 , Flag "syslib" (HasArg exposePackage)
1614 (Deprecated "Use -package instead")
1617 mkFlag :: Bool -- ^ True <=> it should be turned on
1618 -> String -- ^ The flag prefix
1619 -> (DynFlag -> DynP ())
1620 -> (String, DynFlag, Bool -> Deprecated)
1622 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1623 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1625 deprecatedForLanguage :: String -> Bool -> Deprecated
1626 deprecatedForLanguage lang turn_on
1627 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1629 flag | turn_on = lang
1630 | otherwise = "No"++lang
1632 useInstead :: String -> Bool -> Deprecated
1633 useInstead flag turn_on
1634 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1636 no = if turn_on then "" else "no-"
1638 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1639 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1641 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1642 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1643 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1644 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1645 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1646 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1647 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1648 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1649 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1650 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1651 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1652 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1653 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1654 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1655 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1656 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1657 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1658 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1659 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1660 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1661 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1662 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1663 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1664 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1665 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1666 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1667 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1668 ( "strictness", Opt_Strictness, const Supported ),
1669 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1670 ( "full-laziness", Opt_FullLaziness, const Supported ),
1671 ( "liberate-case", Opt_LiberateCase, const Supported ),
1672 ( "spec-constr", Opt_SpecConstr, const Supported ),
1673 ( "cse", Opt_CSE, const Supported ),
1674 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1675 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1676 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1677 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1678 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1679 ( "case-merge", Opt_CaseMerge, const Supported ),
1680 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1681 ( "method-sharing", Opt_MethodSharing, const Supported ),
1682 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1683 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1684 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1685 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1686 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1687 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1688 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1689 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1690 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1691 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1692 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1693 ( "break-on-error", Opt_BreakOnError, const Supported ),
1694 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1695 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1696 ( "run-cps", Opt_RunCPS, const Supported ),
1697 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1698 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1699 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1700 ( "vectorise", Opt_Vectorise, const Supported ),
1701 ( "regs-graph", Opt_RegsGraph, const Supported ),
1702 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1703 ( "th", Opt_TemplateHaskell,
1704 deprecatedForLanguage "TemplateHaskell" ),
1705 ( "fi", Opt_ForeignFunctionInterface,
1706 deprecatedForLanguage "ForeignFunctionInterface" ),
1707 ( "ffi", Opt_ForeignFunctionInterface,
1708 deprecatedForLanguage "ForeignFunctionInterface" ),
1709 ( "arrows", Opt_Arrows,
1710 deprecatedForLanguage "Arrows" ),
1711 ( "generics", Opt_Generics,
1712 deprecatedForLanguage "Generics" ),
1713 ( "implicit-prelude", Opt_ImplicitPrelude,
1714 deprecatedForLanguage "ImplicitPrelude" ),
1715 ( "bang-patterns", Opt_BangPatterns,
1716 deprecatedForLanguage "BangPatterns" ),
1717 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1718 deprecatedForLanguage "MonomorphismRestriction" ),
1719 ( "mono-pat-binds", Opt_MonoPatBinds,
1720 deprecatedForLanguage "MonoPatBinds" ),
1721 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1722 deprecatedForLanguage "ExtendedDefaultRules" ),
1723 ( "implicit-params", Opt_ImplicitParams,
1724 deprecatedForLanguage "ImplicitParams" ),
1725 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1726 deprecatedForLanguage "ScopedTypeVariables" ),
1728 deprecatedForLanguage "PArr" ),
1729 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1730 deprecatedForLanguage "OverlappingInstances" ),
1731 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1732 deprecatedForLanguage "UndecidableInstances" ),
1733 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1734 deprecatedForLanguage "IncoherentInstances" ),
1735 ( "gen-manifest", Opt_GenManifest, const Supported ),
1736 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1737 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1740 supportedLanguages :: [String]
1741 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1743 -- This may contain duplicates
1744 languageOptions :: [DynFlag]
1745 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1747 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1748 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1750 ( "CPP", Opt_Cpp, const Supported ),
1751 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1752 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1753 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1754 ( "MagicHash", Opt_MagicHash, const Supported ),
1755 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1756 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1757 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1758 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1759 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1760 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1761 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1762 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1763 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1764 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1765 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1766 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1767 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1768 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1769 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1770 ( "Arrows", Opt_Arrows, const Supported ),
1771 ( "PArr", Opt_PArr, const Supported ),
1772 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1773 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1774 ( "Generics", Opt_Generics, const Supported ),
1776 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1777 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1778 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1779 ( "RecordPuns", Opt_RecordPuns,
1780 deprecatedForLanguage "NamedFieldPuns" ),
1781 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1782 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1783 ( "GADTs", Opt_GADTs, const Supported ),
1784 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1785 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1786 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1788 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1789 -- On by default (which is not strictly H98):
1790 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1791 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1792 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1793 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1794 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1795 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1797 ( "PatternSignatures", Opt_ScopedTypeVariables,
1798 deprecatedForLanguage "ScopedTypeVariables" ),
1800 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1801 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1802 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1803 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1804 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1805 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1806 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1807 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1808 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1809 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1810 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1811 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1812 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1813 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1814 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1815 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1816 ( "PackageImports", Opt_PackageImports, const Supported ),
1817 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1820 impliedFlags :: [(DynFlag, DynFlag)]
1822 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1823 -- be completely rigid for GADTs
1825 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1826 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1827 -- all over the place
1829 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1830 -- Note [Scoped tyvars] in TcBinds
1831 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1834 glasgowExtsFlags :: [DynFlag]
1835 glasgowExtsFlags = [
1836 Opt_PrintExplicitForalls
1837 , Opt_ForeignFunctionInterface
1838 , Opt_UnliftedFFITypes
1840 , Opt_ImplicitParams
1841 , Opt_ScopedTypeVariables
1843 , Opt_TypeSynonymInstances
1844 , Opt_StandaloneDeriving
1845 , Opt_DeriveDataTypeable
1847 , Opt_DeriveFoldable
1848 , Opt_DeriveTraversable
1849 , Opt_FlexibleContexts
1850 , Opt_FlexibleInstances
1851 , Opt_ConstrainedClassMethods
1852 , Opt_MultiParamTypeClasses
1853 , Opt_FunctionalDependencies
1855 , Opt_PolymorphicComponents
1856 , Opt_ExistentialQuantification
1858 , Opt_PostfixOperators
1860 , Opt_LiberalTypeSynonyms
1864 , Opt_ParallelListComp
1865 , Opt_EmptyDataDecls
1866 , Opt_KindSignatures
1867 , Opt_GeneralizedNewtypeDeriving
1868 , Opt_TypeFamilies ]
1870 -- -----------------------------------------------------------------------------
1871 -- Parsing the dynamic flags.
1873 -- | Parse dynamic flags from a list of command line arguments. Returns the
1874 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1875 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1876 -- flags or missing arguments).
1877 parseDynamicFlags :: Monad m =>
1878 DynFlags -> [Located String]
1879 -> m (DynFlags, [Located String], [Located String])
1880 -- ^ Updated 'DynFlags', left-over arguments, and
1881 -- list of warnings.
1882 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1884 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1885 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1886 parseDynamicNoPackageFlags :: Monad m =>
1887 DynFlags -> [Located String]
1888 -> m (DynFlags, [Located String], [Located String])
1889 -- ^ Updated 'DynFlags', left-over arguments, and
1890 -- list of warnings.
1891 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1893 parseDynamicFlags_ :: Monad m =>
1894 DynFlags -> [Located String] -> Bool
1895 -> m (DynFlags, [Located String], [Located String])
1896 parseDynamicFlags_ dflags args pkg_flags = do
1897 -- XXX Legacy support code
1898 -- We used to accept things like
1899 -- optdep-f -optdepdepend
1900 -- optdep-f -optdep depend
1901 -- optdep -f -optdepdepend
1902 -- optdep -f -optdep depend
1903 -- but the spaces trip up proper argument handling. So get rid of them.
1904 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1905 f (x : xs) = x : f xs
1909 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1910 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1911 | otherwise = dynamic_flags
1913 let ((leftover, errs, warns), dflags')
1914 = runCmdLine (processArgs flag_spec args') dflags
1915 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1916 return (dflags', leftover, warns)
1918 type DynP = CmdLineP DynFlags
1920 upd :: (DynFlags -> DynFlags) -> DynP ()
1922 dfs <- getCmdLineState
1923 putCmdLineState $! (f dfs)
1925 --------------------------
1926 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1927 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1928 ; mapM_ setDynFlag deps }
1930 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1931 -- When you set f, set the ones it implies
1932 -- NB: use setDynFlag recursively, in case the implied flags
1933 -- implies further flags
1934 -- When you un-set f, however, we don't un-set the things it implies
1935 -- (except for -fno-glasgow-exts, which is treated specially)
1937 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1939 --------------------------
1940 setDumpFlag :: DynFlag -> OptKind DynP
1941 setDumpFlag dump_flag
1942 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1944 -- Certain dumpy-things are really interested in what's going
1945 -- on during recompilation checking, so in those cases we
1946 -- don't want to turn it off.
1947 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1948 Opt_D_dump_hi_diffs]
1950 forceRecompile :: DynP ()
1951 -- Whenver we -ddump, force recompilation (by switching off the
1952 -- recompilation checker), else you don't see the dump! However,
1953 -- don't switch it off in --make mode, else *everything* gets
1954 -- recompiled which probably isn't what you want
1955 forceRecompile = do { dfs <- getCmdLineState
1956 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1958 force_recomp dfs = isOneShot (ghcMode dfs)
1960 setVerboseCore2Core :: DynP ()
1961 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1963 upd (\s -> s { shouldDumpSimplPhase = const True })
1965 setDumpSimplPhases :: String -> DynP ()
1966 setDumpSimplPhases s = do forceRecompile
1967 upd (\s -> s { shouldDumpSimplPhase = spec })
1969 spec :: SimplifierMode -> Bool
1971 . map (join (&&) . map match . split ':')
1977 join :: (Bool -> Bool -> Bool)
1978 -> [SimplifierMode -> Bool]
1979 -> SimplifierMode -> Bool
1980 join _ [] = const True
1981 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1983 match :: String -> SimplifierMode -> Bool
1984 match "" = const True
1985 match s = case reads s of
1986 [(n,"")] -> phase_num n
1989 phase_num :: Int -> SimplifierMode -> Bool
1990 phase_num n (SimplPhase k _) = n == k
1991 phase_num _ _ = False
1993 phase_name :: String -> SimplifierMode -> Bool
1994 phase_name s SimplGently = s == "gentle"
1995 phase_name s (SimplPhase _ ss) = s `elem` ss
1997 setVerbosity :: Maybe Int -> DynP ()
1998 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2000 addCmdlineHCInclude :: String -> DynP ()
2001 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2003 extraPkgConf_ :: FilePath -> DynP ()
2004 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2006 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2008 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2010 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2012 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2014 setPackageName :: String -> DynFlags -> DynFlags
2016 | Nothing <- unpackPackageId pid
2017 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2019 = \s -> s{ thisPackage = pid }
2021 pid = stringToPackageId p
2023 -- If we're linking a binary, then only targets that produce object
2024 -- code are allowed (requests for other target types are ignored).
2025 setTarget :: HscTarget -> DynP ()
2026 setTarget l = upd set
2029 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2032 -- Changes the target only if we're compiling object code. This is
2033 -- used by -fasm and -fvia-C, which switch from one to the other, but
2034 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2035 -- can be safely used in an OPTIONS_GHC pragma.
2036 setObjTarget :: HscTarget -> DynP ()
2037 setObjTarget l = upd set
2040 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2043 setOptLevel :: Int -> DynFlags -> DynFlags
2044 setOptLevel n dflags
2045 | hscTarget dflags == HscInterpreted && n > 0
2047 -- not in IO any more, oh well:
2048 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2050 = updOptLevel n dflags
2053 -- -Odph is equivalent to
2055 -- -O2 optimise as much as possible
2056 -- -fno-method-sharing sharing specialisation defeats fusion
2058 -- -fdicts-cheap always inline dictionaries
2059 -- -fmax-simplifier-iterations20 this is necessary sometimes
2060 -- -fsimplifier-phases=3 we use an additional simplifier phase
2062 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2063 -- -fno-spec-constr-count SpecConstr as much as possible
2064 -- -finline-enough-args hack to prevent excessive inlining
2066 setDPHOpt :: DynFlags -> DynFlags
2067 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2069 , specConstrThreshold = Nothing
2070 , specConstrCount = Nothing
2072 `dopt_set` Opt_DictsCheap
2073 `dopt_unset` Opt_MethodSharing
2074 `dopt_set` Opt_InlineIfEnoughArgs
2076 data DPHBackend = DPHPar
2079 deriving(Eq, Ord, Enum, Show)
2081 setDPHBackend :: DPHBackend -> DynP ()
2082 setDPHBackend backend
2084 upd $ \dflags -> dflags { dphBackend = backend }
2085 mapM_ exposePackage (dph_packages backend)
2087 dph_packages DPHThis = []
2088 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2089 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2091 dphPackage :: DynFlags -> PackageId
2092 dphPackage dflags = case dphBackend dflags of
2093 DPHPar -> dphParPackageId
2094 DPHSeq -> dphSeqPackageId
2095 DPHThis -> thisPackage dflags
2097 setMainIs :: String -> DynP ()
2099 | not (null main_fn) && isLower (head main_fn)
2100 -- The arg looked like "Foo.Bar.baz"
2101 = upd $ \d -> d{ mainFunIs = Just main_fn,
2102 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2104 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2105 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2107 | otherwise -- The arg looked like "baz"
2108 = upd $ \d -> d{ mainFunIs = Just arg }
2110 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2112 -----------------------------------------------------------------------------
2113 -- Paths & Libraries
2115 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2117 -- -i on its own deletes the import paths
2118 addImportPath "" = upd (\s -> s{importPaths = []})
2119 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2123 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2126 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2128 addFrameworkPath p =
2129 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2131 #ifndef mingw32_TARGET_OS
2132 split_marker :: Char
2133 split_marker = ':' -- not configurable (ToDo)
2136 splitPathList :: String -> [String]
2137 splitPathList s = filter notNull (splitUp s)
2138 -- empty paths are ignored: there might be a trailing
2139 -- ':' in the initial list, for example. Empty paths can
2140 -- cause confusion when they are translated into -I options
2141 -- for passing to gcc.
2143 #ifndef mingw32_TARGET_OS
2144 splitUp xs = split split_marker xs
2146 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2148 -- That is, if "foo:bar:baz" is used, this interpreted as
2149 -- consisting of three entries, 'foo', 'bar', 'baz'.
2150 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2151 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2153 -- Notice that no attempt is made to fully replace the 'standard'
2154 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2155 -- that this will cause too much breakage for users & ':' will
2156 -- work fine even with DOS paths, if you're not insisting on being silly.
2159 splitUp (x:':':div:xs) | div `elem` dir_markers
2160 = ((x:':':div:p): splitUp rs)
2162 (p,rs) = findNextPath xs
2163 -- we used to check for existence of the path here, but that
2164 -- required the IO monad to be threaded through the command-line
2165 -- parser which is quite inconvenient. The
2166 splitUp xs = cons p (splitUp rs)
2168 (p,rs) = findNextPath xs
2173 -- will be called either when we've consumed nought or the
2174 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2175 -- finding the next split marker.
2177 case break (`elem` split_markers) xs of
2178 (p, _:ds) -> (p, ds)
2181 split_markers :: [Char]
2182 split_markers = [':', ';']
2184 dir_markers :: [Char]
2185 dir_markers = ['/', '\\']
2188 -- -----------------------------------------------------------------------------
2189 -- tmpDir, where we store temporary files.
2191 setTmpDir :: FilePath -> DynFlags -> DynFlags
2192 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2193 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2194 -- seem necessary now --SDM 7/2/2008
2196 -----------------------------------------------------------------------------
2199 setOptHpcDir :: String -> DynP ()
2200 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2202 -----------------------------------------------------------------------------
2203 -- Via-C compilation stuff
2205 -- There are some options that we need to pass to gcc when compiling
2206 -- Haskell code via C, but are only supported by recent versions of
2207 -- gcc. The configure script decides which of these options we need,
2208 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2209 -- read before each via-C compilation. The advantage of having these
2210 -- in a separate file is that the file can be created at install-time
2211 -- depending on the available gcc version, and even re-generated later
2212 -- if gcc is upgraded.
2214 -- The options below are not dependent on the version of gcc, only the
2217 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2218 [String]) -- for registerised HC compilations
2219 machdepCCOpts _dflags
2220 #if alpha_TARGET_ARCH
2222 #ifdef HAVE_THREADED_RTS_SUPPORT
2226 -- For now, to suppress the gcc warning "call-clobbered
2227 -- register used for global register variable", we simply
2228 -- disable all warnings altogether using the -w flag. Oh well.
2230 #elif hppa_TARGET_ARCH
2231 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2232 -- (very nice, but too bad the HP /usr/include files don't agree.)
2233 = ( ["-D_HPUX_SOURCE"], [] )
2235 #elif m68k_TARGET_ARCH
2236 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2237 -- popping of args to routines to be explicit; if we let things
2238 -- be deferred 'til after an STGJUMP, imminent death is certain!
2240 -- -fomit-frame-pointer : *don't*
2241 -- It's better to have a6 completely tied up being a frame pointer
2242 -- rather than let GCC pick random things to do with it.
2243 -- (If we want to steal a6, then we would try to do things
2244 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2245 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2247 #elif i386_TARGET_ARCH
2248 -- -fno-defer-pop : basically the same game as for m68k
2250 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2251 -- the fp (%ebp) for our register maps.
2252 = let n_regs = stolen_x86_regs _dflags
2255 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2258 "-fomit-frame-pointer",
2259 -- we want -fno-builtin, because when gcc inlines
2260 -- built-in functions like memcpy() it tends to
2261 -- run out of registers, requiring -monly-n-regs
2263 "-DSTOLEN_X86_REGS="++show n_regs ]
2266 #elif ia64_TARGET_ARCH
2267 = ( [], ["-fomit-frame-pointer", "-G0"] )
2269 #elif x86_64_TARGET_ARCH
2271 #if darwin_TARGET_OS
2276 ["-fomit-frame-pointer",
2277 "-fno-asynchronous-unwind-tables",
2278 -- the unwind tables are unnecessary for HC code,
2279 -- and get in the way of -split-objs. Another option
2280 -- would be to throw them away in the mangler, but this
2283 -- calling builtins like strlen() using the FFI can
2284 -- cause gcc to run out of regs, so use the external
2288 #elif sparc_TARGET_ARCH
2290 -- For now, to suppress the gcc warning "call-clobbered
2291 -- register used for global register variable", we simply
2292 -- disable all warnings altogether using the -w flag. Oh well.
2294 #elif powerpc_apple_darwin_TARGET
2296 -- Disable Apple's precompiling preprocessor. It's a great thing
2297 -- for "normal" programs, but it doesn't support register variable
2299 = ( [], ["-no-cpp-precomp"] )
2304 picCCOpts :: DynFlags -> [String]
2306 #if darwin_TARGET_OS
2307 -- Apple prefers to do things the other way round.
2308 -- PIC is on by default.
2309 -- -mdynamic-no-pic:
2310 -- Turn off PIC code generation.
2312 -- Don't generate "common" symbols - these are unwanted
2313 -- in dynamic libraries.
2316 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2318 = ["-mdynamic-no-pic"]
2319 #elif mingw32_TARGET_OS
2320 -- no -fPIC for Windows
2322 = ["-U __PIC__","-D__PIC__"]
2326 | opt_PIC || not opt_Static
2327 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2332 -- -----------------------------------------------------------------------------
2336 can_split = cSplitObjs == "YES"
2338 -- -----------------------------------------------------------------------------
2341 compilerInfo :: [(String, String)]
2342 compilerInfo = [("Project name", cProjectName),
2343 ("Project version", cProjectVersion),
2344 ("Booter version", cBooterVersion),
2346 ("Interface file version", cHscIfaceFileVersion),
2347 ("Have interpreter", cGhcWithInterpreter),
2348 ("Object splitting", cSplitObjs),
2349 ("Have native code generator", cGhcWithNativeCodeGen),
2350 ("Support SMP", cGhcWithSMP),
2351 ("Unregisterised", cGhcUnregisterised),
2352 ("Tables next to code", cGhcEnableTablesNextToCode),
2353 ("Win32 DLLs", cEnableWin32DLLs),
2354 ("RTS ways", cGhcRTSWays),
2355 ("Leading underscore", cLeadingUnderscore),
2356 ("Debug on", show debugIsOn)