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_WarnDodgyImports
192 | Opt_WarnUnrecognisedPragmas
193 | Opt_WarnDodgyForeignImports
194 | Opt_WarnLazyUnliftedBindings
195 | Opt_WarnUnusedDoBind
196 | Opt_WarnWrongDoBind
200 | Opt_OverlappingInstances
201 | Opt_UndecidableInstances
202 | Opt_IncoherentInstances
203 | Opt_MonomorphismRestriction
206 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
207 | Opt_ForeignFunctionInterface
208 | Opt_UnliftedFFITypes
209 | Opt_GHCForeignImportPrim
210 | Opt_PArr -- Syntactic support for parallel arrays
211 | Opt_Arrows -- Arrow-notation syntax
212 | Opt_TemplateHaskell
215 | Opt_Generics -- "Derivable type classes"
216 | Opt_ImplicitPrelude
217 | Opt_ScopedTypeVariables
221 | Opt_OverloadedStrings
222 | Opt_DisambiguateRecordFields
223 | Opt_RecordWildCards
229 | Opt_StandaloneDeriving
230 | Opt_DeriveDataTypeable
232 | Opt_DeriveTraversable
235 | Opt_TypeSynonymInstances
236 | Opt_FlexibleContexts
237 | Opt_FlexibleInstances
238 | Opt_ConstrainedClassMethods
239 | Opt_MultiParamTypeClasses
240 | Opt_FunctionalDependencies
242 | Opt_PolymorphicComponents
243 | Opt_ExistentialQuantification
247 | Opt_ParallelListComp
248 | Opt_TransformListComp
249 | Opt_GeneralizedNewtypeDeriving
251 | Opt_PostfixOperators
253 | Opt_LiberalTypeSynonyms
256 | Opt_ImpredicativeTypes
259 | Opt_NewQualifiedOperators
261 | Opt_PrintExplicitForalls
266 | Opt_StaticArgumentTransformation
270 | Opt_IgnoreInterfacePragmas
271 | Opt_OmitInterfacePragmas
272 | Opt_DoLambdaEtaExpansion
276 | Opt_UnboxStrictFields
279 | Opt_InlineIfEnoughArgs
280 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
282 | Opt_RegsGraph -- do graph coloring register allocation
283 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
286 | Opt_AutoSccsOnAllToplevs
287 | Opt_AutoSccsOnExportedToplevs
288 | Opt_AutoSccsOnIndividualCafs
296 | Opt_ExcessPrecision
297 | Opt_EagerBlackHoling
298 | Opt_ReadUserPackageConf
302 | Opt_HideAllPackages
303 | Opt_PrintBindResult
307 | Opt_BreakOnException
309 | Opt_PrintEvldWithShow
310 | Opt_PrintBindContents
313 | Opt_EmitExternalCore
319 | Opt_ConvertToZipCfgAndBack
320 | Opt_AutoLinkPackages
321 | Opt_ImplicitImportQualified
330 | Opt_KeepRawTokenStream
334 -- | Contains not only a collection of 'DynFlag's but also a plethora of
335 -- information relating to the compilation of a single file or GHC session
336 data DynFlags = DynFlags {
339 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
340 stgToDo :: Maybe [StgToDo], -- similarly
341 hscTarget :: HscTarget,
342 hscOutName :: String, -- ^ Name of the output file
343 extCoreName :: String, -- ^ Name of the .hcr output file
344 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
345 optLevel :: Int, -- ^ Optimisation level
346 simplPhases :: Int, -- ^ Number of simplifier phases
347 maxSimplIterations :: Int, -- ^ Max simplifier iterations
348 shouldDumpSimplPhase :: SimplifierMode -> Bool,
349 ruleCheck :: Maybe String,
351 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
352 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
353 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
355 #ifndef OMIT_NATIVE_CODEGEN
356 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
358 stolen_x86_regs :: Int,
359 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
360 importPaths :: [FilePath],
362 mainFunIs :: Maybe String,
363 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
365 dphBackend :: DPHBackend,
367 thisPackage :: PackageId, -- ^ name of package currently being compiled
370 wayNames :: [WayName], -- ^ Way flags from the command line
371 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
372 rtsBuildTag :: String, -- ^ The RTS \"way\"
374 -- For object splitting
375 splitInfo :: Maybe (String,Int),
378 objectDir :: Maybe String,
379 hiDir :: Maybe String,
380 stubDir :: Maybe String,
386 outputFile :: Maybe String,
387 outputHi :: Maybe String,
388 dynLibLoader :: DynLibLoader,
390 -- | This is set by 'DriverPipeline.runPipeline' based on where
391 -- its output is going.
392 dumpPrefix :: Maybe FilePath,
394 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
395 -- Set by @-ddump-file-prefix@
396 dumpPrefixForce :: Maybe FilePath,
398 includePaths :: [String],
399 libraryPaths :: [String],
400 frameworkPaths :: [String], -- used on darwin only
401 cmdlineFrameworks :: [String], -- ditto
402 tmpDir :: String, -- no trailing '/'
404 ghcUsagePath :: FilePath, -- Filled in by SysTools
405 ghciUsagePath :: FilePath, -- ditto
407 hpcDir :: String, -- ^ Path to store the .mix files
409 -- options for particular phases
417 opt_windres :: [String],
419 -- commands for particular phases
421 pgm_P :: (String,[Option]),
423 pgm_c :: (String,[Option]),
424 pgm_m :: (String,[Option]),
425 pgm_s :: (String,[Option]),
426 pgm_a :: (String,[Option]),
427 pgm_l :: (String,[Option]),
428 pgm_dll :: (String,[Option]),
430 pgm_sysman :: String,
431 pgm_windres :: String,
434 depMakefile :: FilePath,
435 depIncludePkgDeps :: Bool,
436 depExcludeMods :: [ModuleName],
437 depSuffixes :: [String],
440 extraPkgConfs :: [FilePath],
441 topDir :: FilePath, -- filled in by SysTools
442 systemPackageConfig :: FilePath, -- ditto
443 -- ^ The @-package-conf@ flags given on the command line, in the order
446 packageFlags :: [PackageFlag],
447 -- ^ The @-package@ and @-hide-package@ flags from the command-line
450 -- NB. do not modify this field, it is calculated by
451 -- Packages.initPackages and Packages.updatePackages.
452 pkgDatabase :: Maybe (UniqFM PackageConfig),
453 pkgState :: PackageState,
456 -- These have to be IORefs, because the defaultCleanupHandler needs to
457 -- know what to clean when an exception happens
458 filesToClean :: IORef [FilePath],
459 dirsToClean :: IORef (FiniteMap FilePath FilePath),
464 -- | Message output action: use "ErrUtils" instead of this if you can
465 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
467 haddockOptions :: Maybe String
470 -- | The target code type of the compilation (if any).
472 -- Whenever you change the target, also make sure to set 'ghcLink' to
473 -- something sensible.
475 -- 'HscNothing' can be used to avoid generating any output, however, note
478 -- * This will not run the desugaring step, thus no warnings generated in
479 -- this step will be output. In particular, this includes warnings related
480 -- to pattern matching. You can run the desugarer manually using
481 -- 'GHC.desugarModule'.
483 -- * If a program uses Template Haskell the typechecker may try to run code
484 -- from an imported module. This will fail if no code has been generated
485 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
486 -- whether this might be the case and choose to either switch to a
487 -- different target or avoid typechecking such modules. (The latter may
488 -- preferable for security reasons.)
491 = HscC -- ^ Generate C code.
492 | HscAsm -- ^ Generate assembly using the native code generator.
493 | HscJava -- ^ Generate Java bytecode.
494 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
495 | HscNothing -- ^ Don't generate any code. See notes above.
498 -- | Will this target result in an object file on the disk?
499 isObjectTarget :: HscTarget -> Bool
500 isObjectTarget HscC = True
501 isObjectTarget HscAsm = True
502 isObjectTarget _ = False
504 -- | The 'GhcMode' tells us whether we're doing multi-module
505 -- compilation (controlled via the "GHC" API) or one-shot
506 -- (single-module) compilation. This makes a difference primarily to
507 -- the "Finder": in one-shot mode we look for interface files for
508 -- imported modules, but in multi-module mode we look for source files
509 -- in order to check whether they need to be recompiled.
511 = CompManager -- ^ @\-\-make@, GHCi, etc.
512 | OneShot -- ^ @ghc -c Foo.hs@
513 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
516 instance Outputable GhcMode where
517 ppr CompManager = ptext (sLit "CompManager")
518 ppr OneShot = ptext (sLit "OneShot")
519 ppr MkDepend = ptext (sLit "MkDepend")
521 isOneShot :: GhcMode -> Bool
522 isOneShot OneShot = True
523 isOneShot _other = False
525 -- | What to do in the link step, if there is one.
527 = NoLink -- ^ Don't link at all
528 | LinkBinary -- ^ Link object code into a binary
529 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
530 -- bytecode and object code).
531 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
534 isNoLink :: GhcLink -> Bool
535 isNoLink NoLink = True
538 -- Is it worth evaluating this Bool and caching it in the DynFlags value
539 -- during initDynFlags?
540 doingTickyProfiling :: DynFlags -> Bool
541 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
544 = ExposePackage String
546 | IgnorePackage String
549 defaultHscTarget :: HscTarget
550 defaultHscTarget = defaultObjectTarget
552 -- | The 'HscTarget' value corresponding to the default way to create
553 -- object files on the current platform.
554 defaultObjectTarget :: HscTarget
556 | cGhcWithNativeCodeGen == "YES" = HscAsm
561 | Wrapped (Maybe String)
565 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
566 initDynFlags :: DynFlags -> IO DynFlags
567 initDynFlags dflags = do
568 -- someday these will be dynamic flags
569 ways <- readIORef v_Ways
570 build_tag <- readIORef v_Build_tag
571 rts_build_tag <- readIORef v_RTS_Build_tag
572 refFilesToClean <- newIORef []
573 refDirsToClean <- newIORef emptyFM
576 buildTag = build_tag,
577 rtsBuildTag = rts_build_tag,
578 filesToClean = refFilesToClean,
579 dirsToClean = refDirsToClean
582 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
583 -- and must be fully initialized by 'GHC.newSession' first.
584 defaultDynFlags :: DynFlags
587 ghcMode = CompManager,
588 ghcLink = LinkBinary,
591 hscTarget = defaultHscTarget,
597 maxSimplIterations = 4,
598 shouldDumpSimplPhase = const False,
600 specConstrThreshold = Just 200,
601 specConstrCount = Just 3,
602 liberateCaseThreshold = Just 200,
603 #ifndef OMIT_NATIVE_CODEGEN
604 targetPlatform = defaultTargetPlatform,
607 cmdlineHcIncludes = [],
611 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
615 thisPackage = mainPackageId,
621 objectSuf = phaseInputExt StopLn,
622 hcSuf = phaseInputExt HCc,
625 outputFile = Nothing,
627 dynLibLoader = SystemDependent,
628 dumpPrefix = Nothing,
629 dumpPrefixForce = Nothing,
633 cmdlineFrameworks = [],
634 tmpDir = cDEFAULT_TMPDIR,
640 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
651 pkgDatabase = Nothing,
652 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
653 wayNames = panic "defaultDynFlags: No wayNames",
654 buildTag = panic "defaultDynFlags: No buildTag",
655 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
657 -- initSysTools fills all these in
658 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
659 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
660 topDir = panic "defaultDynFlags: No topDir",
661 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
662 pgm_L = panic "defaultDynFlags: No pgm_L",
663 pgm_P = panic "defaultDynFlags: No pgm_P",
664 pgm_F = panic "defaultDynFlags: No pgm_F",
665 pgm_c = panic "defaultDynFlags: No pgm_c",
666 pgm_m = panic "defaultDynFlags: No pgm_m",
667 pgm_s = panic "defaultDynFlags: No pgm_s",
668 pgm_a = panic "defaultDynFlags: No pgm_a",
669 pgm_l = panic "defaultDynFlags: No pgm_l",
670 pgm_dll = panic "defaultDynFlags: No pgm_dll",
671 pgm_T = panic "defaultDynFlags: No pgm_T",
672 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
673 pgm_windres = panic "defaultDynFlags: No pgm_windres",
674 -- end of initSysTools values
676 depMakefile = "Makefile",
677 depIncludePkgDeps = False,
680 -- end of ghc -M values
681 filesToClean = panic "defaultDynFlags: No filesToClean",
682 dirsToClean = panic "defaultDynFlags: No dirsToClean",
683 haddockOptions = Nothing,
685 Opt_AutoLinkPackages,
686 Opt_ReadUserPackageConf,
688 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
689 -- behaviour the default, to see if anyone notices
693 Opt_MonomorphismRestriction,
703 Opt_PrintBindContents
705 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
706 -- The default -O0 options
709 log_action = \severity srcSpan style msg ->
711 SevInfo -> printErrs (msg style)
712 SevFatal -> printErrs (msg style)
715 printErrs ((mkLocMessage srcSpan msg) style)
716 -- careful (#2302): printErrs prints in UTF-8, whereas
717 -- converting to string first and using hPutStr would
718 -- just emit the low 8 bits of each unicode char.
725 0 | print errors & warnings only
726 1 | minimal verbosity: print "compiling M ... done." for each module.
727 2 | equivalent to -dshow-passes
728 3 | equivalent to existing "ghc -v"
729 4 | "ghc -v -ddump-most"
730 5 | "ghc -v -ddump-all"
733 -- | Test whether a 'DynFlag' is set
734 dopt :: DynFlag -> DynFlags -> Bool
735 dopt f dflags = f `elem` (flags dflags)
738 dopt_set :: DynFlags -> DynFlag -> DynFlags
739 dopt_set dfs f = dfs{ flags = f : flags dfs }
741 -- | Unset a 'DynFlag'
742 dopt_unset :: DynFlags -> DynFlag -> DynFlags
743 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
745 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
746 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
747 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
748 -> [a] -- ^ Correctly ordered extracted options
749 getOpts dflags opts = reverse (opts dflags)
750 -- We add to the options from the front, so we need to reverse the list
752 -- | Gets the verbosity flag for the current verbosity level. This is fed to
753 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
754 getVerbFlag :: DynFlags -> String
756 | verbosity dflags >= 3 = "-v"
759 setObjectDir, setHiDir, setStubDir, setOutputDir,
760 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
761 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
762 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
763 addCmdlineFramework, addHaddockOpts
764 :: String -> DynFlags -> DynFlags
765 setOutputFile, setOutputHi, setDumpPrefixForce
766 :: Maybe String -> DynFlags -> DynFlags
768 setObjectDir f d = d{ objectDir = Just f}
769 setHiDir f d = d{ hiDir = Just f}
770 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
771 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
772 -- \#included from the .hc file when compiling with -fvia-C.
773 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
775 setObjectSuf f d = d{ objectSuf = f}
776 setHiSuf f d = d{ hiSuf = f}
777 setHcSuf f d = d{ hcSuf = f}
779 setOutputFile f d = d{ outputFile = f}
780 setOutputHi f d = d{ outputHi = f}
782 parseDynLibLoaderMode f d =
784 ("deploy", "") -> d{ dynLibLoader = Deployable }
785 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
786 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
787 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
788 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
789 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
791 setDumpPrefixForce f d = d { dumpPrefixForce = f}
793 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
794 -- Config.hs should really use Option.
795 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
797 setPgmL f d = d{ pgm_L = f}
798 setPgmF f d = d{ pgm_F = f}
799 setPgmc f d = d{ pgm_c = (f,[])}
800 setPgmm f d = d{ pgm_m = (f,[])}
801 setPgms f d = d{ pgm_s = (f,[])}
802 setPgma f d = d{ pgm_a = (f,[])}
803 setPgml f d = d{ pgm_l = (f,[])}
804 setPgmdll f d = d{ pgm_dll = (f,[])}
805 setPgmwindres f d = d{ pgm_windres = f}
807 addOptL f d = d{ opt_L = f : opt_L d}
808 addOptP f d = d{ opt_P = f : opt_P d}
809 addOptF f d = d{ opt_F = f : opt_F d}
810 addOptc f d = d{ opt_c = f : opt_c d}
811 addOptm f d = d{ opt_m = f : opt_m d}
812 addOpta f d = d{ opt_a = f : opt_a d}
813 addOptl f d = d{ opt_l = f : opt_l d}
814 addOptwindres f d = d{ opt_windres = f : opt_windres d}
816 setDepMakefile :: FilePath -> DynFlags -> DynFlags
817 setDepMakefile f d = d { depMakefile = deOptDep f }
819 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
820 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
822 addDepExcludeMod :: String -> DynFlags -> DynFlags
824 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
826 addDepSuffix :: FilePath -> DynFlags -> DynFlags
827 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
830 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
831 -- we need to strip the "-optdep" off of the arg
832 deOptDep :: String -> String
833 deOptDep x = case stripPrefix "-optdep" x of
837 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
839 addHaddockOpts f d = d{ haddockOptions = Just f}
841 -- -----------------------------------------------------------------------------
842 -- Command-line options
844 -- | When invoking external tools as part of the compilation pipeline, we
845 -- pass these a sequence of options on the command-line. Rather than
846 -- just using a list of Strings, we use a type that allows us to distinguish
847 -- between filepaths and 'other stuff'. The reason for this is that
848 -- this type gives us a handle on transforming filenames, and filenames only,
849 -- to whatever format they're expected to be on a particular platform.
851 = FileOption -- an entry that _contains_ filename(s) / filepaths.
852 String -- a non-filepath prefix that shouldn't be
853 -- transformed (e.g., "/out=")
854 String -- the filepath/filename portion
857 -----------------------------------------------------------------------------
858 -- Setting the optimisation level
860 updOptLevel :: Int -> DynFlags -> DynFlags
861 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
863 = dfs2{ optLevel = final_n }
865 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
866 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
867 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
869 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
870 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
872 optLevelFlags :: [([Int], DynFlag)]
874 = [ ([0], Opt_IgnoreInterfacePragmas)
875 , ([0], Opt_OmitInterfacePragmas)
877 , ([1,2], Opt_IgnoreAsserts)
878 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
880 , ([1,2], Opt_DoEtaReduction)
881 , ([1,2], Opt_CaseMerge)
882 , ([1,2], Opt_Strictness)
884 , ([1,2], Opt_FullLaziness)
886 , ([2], Opt_LiberateCase)
887 , ([2], Opt_SpecConstr)
889 -- , ([2], Opt_StaticArgumentTransformation)
890 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
891 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
892 -- several improvements to the heuristics, and I'm concerned that without
893 -- those changes SAT will interfere with some attempts to write "high
894 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
895 -- this year. In particular, the version in HEAD lacks the tail call
896 -- criterion, so many things that look like reasonable loops will be
897 -- turned into functions with extra (unneccesary) thunk creation.
899 , ([0,1,2], Opt_DoLambdaEtaExpansion)
900 -- This one is important for a tiresome reason:
901 -- we want to make sure that the bindings for data
902 -- constructors are eta-expanded. This is probably
903 -- a good thing anyway, but it seems fragile.
906 -- -----------------------------------------------------------------------------
907 -- Standard sets of warning options
909 standardWarnings :: [DynFlag]
911 = [ Opt_WarnWarningsDeprecations,
912 Opt_WarnDeprecatedFlags,
913 Opt_WarnUnrecognisedPragmas,
914 Opt_WarnOverlappingPatterns,
915 Opt_WarnMissingFields,
916 Opt_WarnMissingMethods,
917 Opt_WarnDuplicateExports,
918 Opt_WarnLazyUnliftedBindings,
919 Opt_WarnDodgyForeignImports,
923 minusWOpts :: [DynFlag]
925 = standardWarnings ++
926 [ Opt_WarnUnusedBinds,
927 Opt_WarnUnusedMatches,
928 Opt_WarnUnusedImports,
929 Opt_WarnIncompletePatterns,
933 minusWallOpts :: [DynFlag]
936 [ Opt_WarnTypeDefaults,
937 Opt_WarnNameShadowing,
944 -- minuswRemovesOpts should be every warning option
945 minuswRemovesOpts :: [DynFlag]
948 [Opt_WarnImplicitPrelude,
949 Opt_WarnIncompletePatternsRecUpd,
950 Opt_WarnSimplePatterns,
951 Opt_WarnMonomorphism,
952 Opt_WarnUnrecognisedPragmas,
956 -- -----------------------------------------------------------------------------
957 -- CoreToDo: abstraction of core-to-core passes to run.
959 data CoreToDo -- These are diff core-to-core passes,
960 -- which may be invoked in any order,
961 -- as many times as you like.
963 = CoreDoSimplify -- The core-to-core simplifier.
966 -- Each run of the simplifier can take a different
967 -- set of simplifier-specific flags.
969 | CoreDoFloatOutwards FloatOutSwitches
974 | CoreDoWorkerWrapper
977 | CoreDoOldStrictness
980 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
981 -- matching this string
982 | CoreDoVectorisation PackageId
983 | CoreDoNothing -- Useful when building up
984 | CoreDoPasses [CoreToDo] -- lists of these things
987 data SimplifierMode -- See comments in SimplMonad
989 | SimplPhase Int [String]
991 instance Outputable SimplifierMode where
992 ppr SimplGently = ptext (sLit "gentle")
993 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
996 data SimplifierSwitch
997 = MaxSimplifierIterations Int
1001 data FloatOutSwitches = FloatOutSwitches {
1002 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1003 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1004 -- even if they do not escape a lambda
1007 instance Outputable FloatOutSwitches where
1008 ppr = pprFloatOutSwitches
1010 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1011 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1012 <+> pp_not (floatOutConstants sw) <+> text "constants"
1015 pp_not False = text "not"
1017 -- | Switches that specify the minimum amount of floating out
1018 -- gentleFloatOutSwitches :: FloatOutSwitches
1019 -- gentleFloatOutSwitches = FloatOutSwitches False False
1021 -- | Switches that do not specify floating out of lambdas, just of constants
1022 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1023 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1026 -- The core-to-core pass ordering is derived from the DynFlags:
1027 runWhen :: Bool -> CoreToDo -> CoreToDo
1028 runWhen True do_this = do_this
1029 runWhen False _ = CoreDoNothing
1031 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1032 runMaybe (Just x) f = f x
1033 runMaybe Nothing _ = CoreDoNothing
1035 getCoreToDo :: DynFlags -> [CoreToDo]
1037 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1038 | otherwise = core_todo
1040 opt_level = optLevel dflags
1041 phases = simplPhases dflags
1042 max_iter = maxSimplIterations dflags
1043 strictness = dopt Opt_Strictness dflags
1044 full_laziness = dopt Opt_FullLaziness dflags
1045 cse = dopt Opt_CSE dflags
1046 spec_constr = dopt Opt_SpecConstr dflags
1047 liberate_case = dopt Opt_LiberateCase dflags
1048 rule_check = ruleCheck dflags
1049 static_args = dopt Opt_StaticArgumentTransformation dflags
1051 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1053 simpl_phase phase names iter
1055 [ CoreDoSimplify (SimplPhase phase names) [
1056 MaxSimplifierIterations iter
1058 maybe_rule_check phase
1062 = runWhen (dopt Opt_Vectorise dflags)
1063 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1066 -- By default, we have 2 phases before phase 0.
1068 -- Want to run with inline phase 2 after the specialiser to give
1069 -- maximum chance for fusion to work before we inline build/augment
1070 -- in phase 1. This made a difference in 'ansi' where an
1071 -- overloaded function wasn't inlined till too late.
1073 -- Need phase 1 so that build/augment get
1074 -- inlined. I found that spectral/hartel/genfft lost some useful
1075 -- strictness in the function sumcode' if augment is not inlined
1076 -- before strictness analysis runs
1077 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1078 | phase <- [phases, phases-1 .. 1] ]
1081 -- initial simplify: mk specialiser happy: minimum effort please
1082 simpl_gently = CoreDoSimplify SimplGently [
1083 -- Simplify "gently"
1084 -- Don't inline anything till full laziness has bitten
1085 -- In particular, inlining wrappers inhibits floating
1086 -- e.g. ...(case f x of ...)...
1087 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1088 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1089 -- and now the redex (f x) isn't floatable any more
1090 -- Similarly, don't apply any rules until after full
1091 -- laziness. Notably, list fusion can prevent floating.
1093 NoCaseOfCase, -- Don't do case-of-case transformations.
1094 -- This makes full laziness work better
1095 MaxSimplifierIterations max_iter
1099 if opt_level == 0 then
1101 simpl_phase 0 ["final"] max_iter]
1102 else {- opt_level >= 1 -} [
1104 -- We want to do the static argument transform before full laziness as it
1105 -- may expose extra opportunities to float things outwards. However, to fix
1106 -- up the output of the transformation we need at do at least one simplify
1107 -- after this before anything else
1108 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1110 -- We run vectorisation here for now, but we might also try to run
1114 -- initial simplify: mk specialiser happy: minimum effort please
1117 -- Specialisation is best done before full laziness
1118 -- so that overloaded functions have all their dictionary lambdas manifest
1121 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1122 -- Was: gentleFloatOutSwitches
1123 -- I have no idea why, but not floating constants to top level is
1124 -- very bad in some cases.
1125 -- Notably: p_ident in spectral/rewrite
1126 -- Changing from "gentle" to "constantsOnly" improved
1127 -- rewrite's allocation by 19%, and made 0.0% difference
1128 -- to any other nofib benchmark
1134 -- Phase 0: allow all Ids to be inlined now
1135 -- This gets foldr inlined before strictness analysis
1137 -- At least 3 iterations because otherwise we land up with
1138 -- huge dead expressions because of an infelicity in the
1140 -- let k = BIG in foldr k z xs
1141 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1142 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1144 simpl_phase 0 ["main"] (max max_iter 3),
1147 #ifdef OLD_STRICTNESS
1148 CoreDoOldStrictness,
1150 runWhen strictness (CoreDoPasses [
1152 CoreDoWorkerWrapper,
1154 simpl_phase 0 ["post-worker-wrapper"] max_iter
1157 runWhen full_laziness
1158 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1159 -- nofib/spectral/hartel/wang doubles in speed if you
1160 -- do full laziness late in the day. It only happens
1161 -- after fusion and other stuff, so the early pass doesn't
1162 -- catch it. For the record, the redex is
1163 -- f_el22 (f_el21 r_midblock)
1166 runWhen cse CoreCSE,
1167 -- We want CSE to follow the final full-laziness pass, because it may
1168 -- succeed in commoning up things floated out by full laziness.
1169 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1175 -- Case-liberation for -O2. This should be after
1176 -- strictness analysis and the simplification which follows it.
1177 runWhen liberate_case (CoreDoPasses [
1179 simpl_phase 0 ["post-liberate-case"] max_iter
1180 ]), -- Run the simplifier after LiberateCase to vastly
1181 -- reduce the possiblility of shadowing
1182 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1184 runWhen spec_constr CoreDoSpecConstr,
1188 -- Final clean-up simplification:
1189 simpl_phase 0 ["final"] max_iter
1192 -- -----------------------------------------------------------------------------
1193 -- StgToDo: abstraction of stg-to-stg passes to run.
1196 = StgDoMassageForProfiling -- should be (next to) last
1197 -- There's also setStgVarInfo, but its absolute "lastness"
1198 -- is so critical that it is hardwired in (no flag).
1201 getStgToDo :: DynFlags -> [StgToDo]
1203 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1206 stg_stats = dopt Opt_StgStats dflags
1208 todo1 = if stg_stats then [D_stg_stats] else []
1210 todo2 | WayProf `elem` wayNames dflags
1211 = StgDoMassageForProfiling : todo1
1215 -- -----------------------------------------------------------------------------
1218 allFlags :: [String]
1219 allFlags = map ('-':) $
1220 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1221 map ("fno-"++) flags ++
1222 map ("f"++) flags ++
1223 map ("X"++) supportedLanguages ++
1224 map ("XNo"++) supportedLanguages
1225 where ok (PrefixPred _ _) = False
1227 flags = [ name | (name, _, _) <- fFlags ]
1229 dynamic_flags :: [Flag DynP]
1231 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1232 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1233 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1234 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1235 , Flag "v" (OptIntSuffix setVerbosity) Supported
1237 ------- Specific phases --------------------------------------------
1238 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1239 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1240 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1241 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1242 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1243 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1244 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1245 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1246 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1247 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1249 , Flag "optL" (HasArg (upd . addOptL)) Supported
1250 , Flag "optP" (HasArg (upd . addOptP)) Supported
1251 , Flag "optF" (HasArg (upd . addOptF)) Supported
1252 , Flag "optc" (HasArg (upd . addOptc)) Supported
1253 , Flag "optm" (HasArg (upd . addOptm)) Supported
1254 , Flag "opta" (HasArg (upd . addOpta)) Supported
1255 , Flag "optl" (HasArg (upd . addOptl)) Supported
1256 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1259 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1262 -------- ghc -M -----------------------------------------------------
1263 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1264 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1265 (Deprecated "Use -dep-suffix instead")
1266 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1267 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1268 (Deprecated "Use -dep-makefile instead")
1269 , Flag "optdep-w" (NoArg (return ()))
1270 (Deprecated "-optdep-w doesn't do anything")
1271 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1272 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1273 (Deprecated "Use -include-pkg-deps instead")
1274 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1275 (Deprecated "Use -include-pkg-deps instead")
1276 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1277 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1278 (Deprecated "Use -exclude-module instead")
1279 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1280 (Deprecated "Use -exclude-module instead")
1282 -------- Linking ----------------------------------------------------
1283 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1285 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1286 (Deprecated "Use -c instead")
1287 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1289 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1292 ------- Libraries ---------------------------------------------------
1293 , Flag "L" (Prefix addLibraryPath ) Supported
1294 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1296 ------- Frameworks --------------------------------------------------
1297 -- -framework-path should really be -F ...
1298 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1299 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1301 ------- Output Redirection ------------------------------------------
1302 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1303 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1304 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1305 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1306 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1307 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1308 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1309 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1310 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1311 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1312 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1315 ------- Keeping temporary files -------------------------------------
1316 -- These can be singular (think ghc -c) or plural (think ghc --make)
1317 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1318 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1319 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1320 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1321 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1322 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1323 -- This only makes sense as plural
1324 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1326 ------- Miscellaneous ----------------------------------------------
1327 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1328 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1329 , Flag "main-is" (SepArg setMainIs ) Supported
1330 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1331 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1332 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1334 ------- recompilation checker --------------------------------------
1335 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1336 (Deprecated "Use -fno-force-recomp instead")
1337 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1338 (Deprecated "Use -fforce-recomp instead")
1340 ------ HsCpp opts ---------------------------------------------------
1341 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1342 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1344 ------- Include/Import Paths ----------------------------------------
1345 , Flag "I" (Prefix addIncludePath) Supported
1346 , Flag "i" (OptPrefix addImportPath ) Supported
1348 ------ Debugging ----------------------------------------------------
1349 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1351 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1353 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1355 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1357 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1359 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1361 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1363 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1365 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1367 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1369 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1371 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1373 , Flag "ddump-asm-regalloc-stages"
1374 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1376 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1378 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1380 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1382 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1384 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1386 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1388 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1390 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1392 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1394 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1396 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1398 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1400 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1402 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1404 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1406 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1408 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1410 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1412 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1414 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1416 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1418 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1420 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1422 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1424 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1426 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1428 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1430 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1432 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1434 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1436 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1438 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1440 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1442 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1444 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1446 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1448 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1450 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1452 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1454 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1456 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1458 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1460 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1462 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1465 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1467 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1469 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1471 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1473 , Flag "dshow-passes"
1474 (NoArg (do forceRecompile
1475 setVerbosity (Just 2)))
1477 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1480 ------ Machine dependant (-m<blah>) stuff ---------------------------
1482 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1484 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1486 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1489 ------ Warning opts -------------------------------------------------
1490 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1492 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1494 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1496 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1498 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1499 (Deprecated "Use -w instead")
1500 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1503 ------ Optimisation flags ------------------------------------------
1504 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1505 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1506 (Deprecated "Use -O0 instead")
1507 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1508 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1510 -- If the number is missing, use 1
1512 , Flag "fsimplifier-phases"
1513 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1515 , Flag "fmax-simplifier-iterations"
1516 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1519 , Flag "fspec-constr-threshold"
1520 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1522 , Flag "fno-spec-constr-threshold"
1523 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1525 , Flag "fspec-constr-count"
1526 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1528 , Flag "fno-spec-constr-count"
1529 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1531 , Flag "fliberate-case-threshold"
1532 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1534 , Flag "fno-liberate-case-threshold"
1535 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1538 , Flag "frule-check"
1539 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1541 , Flag "fcontext-stack"
1542 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1545 ------ Profiling ----------------------------------------------------
1547 -- XXX Should the -f* flags be deprecated?
1548 -- They don't seem to be documented
1549 , Flag "fauto-sccs-on-all-toplevs"
1550 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1553 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1555 , Flag "no-auto-all"
1556 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1558 , Flag "fauto-sccs-on-exported-toplevs"
1559 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1562 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1565 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1567 , Flag "fauto-sccs-on-individual-cafs"
1568 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1571 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1574 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1577 ------ DPH flags ----------------------------------------------------
1580 (NoArg (setDPHBackend DPHSeq))
1583 (NoArg (setDPHBackend DPHPar))
1586 (NoArg (setDPHBackend DPHThis))
1589 ------ Compiler flags -----------------------------------------------
1591 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1592 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1593 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1595 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1596 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1597 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1599 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1601 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1604 ++ map (mkFlag True "f" setDynFlag ) fFlags
1605 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1606 ++ map (mkFlag True "X" setDynFlag ) xFlags
1607 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1609 package_flags :: [Flag DynP]
1611 ------- Packages ----------------------------------------------------
1612 Flag "package-conf" (HasArg extraPkgConf_) Supported
1613 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1615 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1616 , Flag "package" (HasArg exposePackage) Supported
1617 , Flag "hide-package" (HasArg hidePackage) Supported
1618 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1620 , Flag "ignore-package" (HasArg ignorePackage)
1622 , Flag "syslib" (HasArg exposePackage)
1623 (Deprecated "Use -package instead")
1626 mkFlag :: Bool -- ^ True <=> it should be turned on
1627 -> String -- ^ The flag prefix
1628 -> (DynFlag -> DynP ())
1629 -> (String, DynFlag, Bool -> Deprecated)
1631 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1632 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1634 deprecatedForLanguage :: String -> Bool -> Deprecated
1635 deprecatedForLanguage lang turn_on
1636 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1638 flag | turn_on = lang
1639 | otherwise = "No"++lang
1641 useInstead :: String -> Bool -> Deprecated
1642 useInstead flag turn_on
1643 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1645 no = if turn_on then "" else "no-"
1647 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1648 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1650 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1651 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1652 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1653 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1654 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1655 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1656 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1657 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1658 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1659 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1660 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1661 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1662 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1663 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1664 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1665 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1666 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1667 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1668 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1669 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1670 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1671 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1672 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1673 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1674 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1675 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1676 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1677 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1678 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1679 ( "strictness", Opt_Strictness, const Supported ),
1680 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1681 ( "full-laziness", Opt_FullLaziness, const Supported ),
1682 ( "liberate-case", Opt_LiberateCase, const Supported ),
1683 ( "spec-constr", Opt_SpecConstr, const Supported ),
1684 ( "cse", Opt_CSE, const Supported ),
1685 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1686 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1687 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1688 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1689 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1690 ( "case-merge", Opt_CaseMerge, const Supported ),
1691 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1692 ( "method-sharing", Opt_MethodSharing, const Supported ),
1693 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1694 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1695 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1696 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1697 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1698 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1699 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1700 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1701 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1702 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1703 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1704 ( "break-on-error", Opt_BreakOnError, const Supported ),
1705 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1706 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1707 ( "run-cps", Opt_RunCPS, const Supported ),
1708 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1709 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1710 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1711 ( "vectorise", Opt_Vectorise, const Supported ),
1712 ( "regs-graph", Opt_RegsGraph, const Supported ),
1713 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1714 ( "th", Opt_TemplateHaskell,
1715 deprecatedForLanguage "TemplateHaskell" ),
1716 ( "fi", Opt_ForeignFunctionInterface,
1717 deprecatedForLanguage "ForeignFunctionInterface" ),
1718 ( "ffi", Opt_ForeignFunctionInterface,
1719 deprecatedForLanguage "ForeignFunctionInterface" ),
1720 ( "arrows", Opt_Arrows,
1721 deprecatedForLanguage "Arrows" ),
1722 ( "generics", Opt_Generics,
1723 deprecatedForLanguage "Generics" ),
1724 ( "implicit-prelude", Opt_ImplicitPrelude,
1725 deprecatedForLanguage "ImplicitPrelude" ),
1726 ( "bang-patterns", Opt_BangPatterns,
1727 deprecatedForLanguage "BangPatterns" ),
1728 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1729 deprecatedForLanguage "MonomorphismRestriction" ),
1730 ( "mono-pat-binds", Opt_MonoPatBinds,
1731 deprecatedForLanguage "MonoPatBinds" ),
1732 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1733 deprecatedForLanguage "ExtendedDefaultRules" ),
1734 ( "implicit-params", Opt_ImplicitParams,
1735 deprecatedForLanguage "ImplicitParams" ),
1736 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1737 deprecatedForLanguage "ScopedTypeVariables" ),
1739 deprecatedForLanguage "PArr" ),
1740 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1741 deprecatedForLanguage "OverlappingInstances" ),
1742 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1743 deprecatedForLanguage "UndecidableInstances" ),
1744 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1745 deprecatedForLanguage "IncoherentInstances" ),
1746 ( "gen-manifest", Opt_GenManifest, const Supported ),
1747 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1748 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1749 ( "shared-implib", Opt_SharedImplib, const Supported ),
1750 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1753 supportedLanguages :: [String]
1754 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1756 -- This may contain duplicates
1757 languageOptions :: [DynFlag]
1758 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1760 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1761 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1763 ( "CPP", Opt_Cpp, const Supported ),
1764 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1765 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1766 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1767 ( "MagicHash", Opt_MagicHash, const Supported ),
1768 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1769 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1770 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1771 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1772 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1773 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1774 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1775 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1776 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1777 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1778 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1779 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1780 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1781 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1782 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1783 ( "Arrows", Opt_Arrows, const Supported ),
1784 ( "PArr", Opt_PArr, const Supported ),
1785 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1786 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1787 ( "Generics", Opt_Generics, const Supported ),
1789 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1790 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1791 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1792 ( "RecordPuns", Opt_RecordPuns,
1793 deprecatedForLanguage "NamedFieldPuns" ),
1794 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1795 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1796 ( "GADTs", Opt_GADTs, const Supported ),
1797 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1798 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1799 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1801 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1802 -- On by default (which is not strictly H98):
1803 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1804 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1805 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1806 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1807 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1808 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1810 ( "PatternSignatures", Opt_ScopedTypeVariables,
1811 deprecatedForLanguage "ScopedTypeVariables" ),
1813 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1814 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1815 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1816 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1817 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1818 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1819 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1820 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1821 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1822 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1823 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1824 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1825 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1826 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1827 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1828 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1829 ( "PackageImports", Opt_PackageImports, const Supported ),
1830 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1833 impliedFlags :: [(DynFlag, DynFlag)]
1835 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1836 -- be completely rigid for GADTs
1838 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1839 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1840 -- all over the place
1842 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1843 -- Note [Scoped tyvars] in TcBinds
1844 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1847 glasgowExtsFlags :: [DynFlag]
1848 glasgowExtsFlags = [
1849 Opt_PrintExplicitForalls
1850 , Opt_ForeignFunctionInterface
1851 , Opt_UnliftedFFITypes
1853 , Opt_ImplicitParams
1854 , Opt_ScopedTypeVariables
1856 , Opt_TypeSynonymInstances
1857 , Opt_StandaloneDeriving
1858 , Opt_DeriveDataTypeable
1860 , Opt_DeriveFoldable
1861 , Opt_DeriveTraversable
1862 , Opt_FlexibleContexts
1863 , Opt_FlexibleInstances
1864 , Opt_ConstrainedClassMethods
1865 , Opt_MultiParamTypeClasses
1866 , Opt_FunctionalDependencies
1868 , Opt_PolymorphicComponents
1869 , Opt_ExistentialQuantification
1871 , Opt_PostfixOperators
1873 , Opt_LiberalTypeSynonyms
1877 , Opt_ParallelListComp
1878 , Opt_EmptyDataDecls
1879 , Opt_KindSignatures
1880 , Opt_GeneralizedNewtypeDeriving
1881 , Opt_TypeFamilies ]
1883 -- -----------------------------------------------------------------------------
1884 -- Parsing the dynamic flags.
1886 -- | Parse dynamic flags from a list of command line arguments. Returns the
1887 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1888 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1889 -- flags or missing arguments).
1890 parseDynamicFlags :: Monad m =>
1891 DynFlags -> [Located String]
1892 -> m (DynFlags, [Located String], [Located String])
1893 -- ^ Updated 'DynFlags', left-over arguments, and
1894 -- list of warnings.
1895 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1897 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1898 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1899 parseDynamicNoPackageFlags :: Monad m =>
1900 DynFlags -> [Located String]
1901 -> m (DynFlags, [Located String], [Located String])
1902 -- ^ Updated 'DynFlags', left-over arguments, and
1903 -- list of warnings.
1904 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1906 parseDynamicFlags_ :: Monad m =>
1907 DynFlags -> [Located String] -> Bool
1908 -> m (DynFlags, [Located String], [Located String])
1909 parseDynamicFlags_ dflags args pkg_flags = do
1910 -- XXX Legacy support code
1911 -- We used to accept things like
1912 -- optdep-f -optdepdepend
1913 -- optdep-f -optdep depend
1914 -- optdep -f -optdepdepend
1915 -- optdep -f -optdep depend
1916 -- but the spaces trip up proper argument handling. So get rid of them.
1917 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1918 f (x : xs) = x : f xs
1922 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1923 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1924 | otherwise = dynamic_flags
1926 let ((leftover, errs, warns), dflags')
1927 = runCmdLine (processArgs flag_spec args') dflags
1928 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1929 return (dflags', leftover, warns)
1931 type DynP = CmdLineP DynFlags
1933 upd :: (DynFlags -> DynFlags) -> DynP ()
1935 dfs <- getCmdLineState
1936 putCmdLineState $! (f dfs)
1938 --------------------------
1939 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1940 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1941 ; mapM_ setDynFlag deps }
1943 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1944 -- When you set f, set the ones it implies
1945 -- NB: use setDynFlag recursively, in case the implied flags
1946 -- implies further flags
1947 -- When you un-set f, however, we don't un-set the things it implies
1948 -- (except for -fno-glasgow-exts, which is treated specially)
1950 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1952 --------------------------
1953 setDumpFlag :: DynFlag -> OptKind DynP
1954 setDumpFlag dump_flag
1955 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1957 -- Certain dumpy-things are really interested in what's going
1958 -- on during recompilation checking, so in those cases we
1959 -- don't want to turn it off.
1960 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1961 Opt_D_dump_hi_diffs]
1963 forceRecompile :: DynP ()
1964 -- Whenver we -ddump, force recompilation (by switching off the
1965 -- recompilation checker), else you don't see the dump! However,
1966 -- don't switch it off in --make mode, else *everything* gets
1967 -- recompiled which probably isn't what you want
1968 forceRecompile = do { dfs <- getCmdLineState
1969 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1971 force_recomp dfs = isOneShot (ghcMode dfs)
1973 setVerboseCore2Core :: DynP ()
1974 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1976 upd (\s -> s { shouldDumpSimplPhase = const True })
1978 setDumpSimplPhases :: String -> DynP ()
1979 setDumpSimplPhases s = do forceRecompile
1980 upd (\s -> s { shouldDumpSimplPhase = spec })
1982 spec :: SimplifierMode -> Bool
1984 . map (join (&&) . map match . split ':')
1990 join :: (Bool -> Bool -> Bool)
1991 -> [SimplifierMode -> Bool]
1992 -> SimplifierMode -> Bool
1993 join _ [] = const True
1994 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1996 match :: String -> SimplifierMode -> Bool
1997 match "" = const True
1998 match s = case reads s of
1999 [(n,"")] -> phase_num n
2002 phase_num :: Int -> SimplifierMode -> Bool
2003 phase_num n (SimplPhase k _) = n == k
2004 phase_num _ _ = False
2006 phase_name :: String -> SimplifierMode -> Bool
2007 phase_name s SimplGently = s == "gentle"
2008 phase_name s (SimplPhase _ ss) = s `elem` ss
2010 setVerbosity :: Maybe Int -> DynP ()
2011 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2013 addCmdlineHCInclude :: String -> DynP ()
2014 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2016 extraPkgConf_ :: FilePath -> DynP ()
2017 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2019 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2021 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2023 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2025 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2027 setPackageName :: String -> DynFlags -> DynFlags
2029 | Nothing <- unpackPackageId pid
2030 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2032 = \s -> s{ thisPackage = pid }
2034 pid = stringToPackageId p
2036 -- If we're linking a binary, then only targets that produce object
2037 -- code are allowed (requests for other target types are ignored).
2038 setTarget :: HscTarget -> DynP ()
2039 setTarget l = upd set
2042 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2045 -- Changes the target only if we're compiling object code. This is
2046 -- used by -fasm and -fvia-C, which switch from one to the other, but
2047 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2048 -- can be safely used in an OPTIONS_GHC pragma.
2049 setObjTarget :: HscTarget -> DynP ()
2050 setObjTarget l = upd set
2053 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2056 setOptLevel :: Int -> DynFlags -> DynFlags
2057 setOptLevel n dflags
2058 | hscTarget dflags == HscInterpreted && n > 0
2060 -- not in IO any more, oh well:
2061 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2063 = updOptLevel n dflags
2066 -- -Odph is equivalent to
2068 -- -O2 optimise as much as possible
2069 -- -fno-method-sharing sharing specialisation defeats fusion
2071 -- -fdicts-cheap always inline dictionaries
2072 -- -fmax-simplifier-iterations20 this is necessary sometimes
2073 -- -fsimplifier-phases=3 we use an additional simplifier phase
2075 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2076 -- -fno-spec-constr-count SpecConstr as much as possible
2077 -- -finline-enough-args hack to prevent excessive inlining
2079 setDPHOpt :: DynFlags -> DynFlags
2080 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2082 , specConstrThreshold = Nothing
2083 , specConstrCount = Nothing
2085 `dopt_set` Opt_DictsCheap
2086 `dopt_unset` Opt_MethodSharing
2087 `dopt_set` Opt_InlineIfEnoughArgs
2089 data DPHBackend = DPHPar
2092 deriving(Eq, Ord, Enum, Show)
2094 setDPHBackend :: DPHBackend -> DynP ()
2095 setDPHBackend backend
2097 upd $ \dflags -> dflags { dphBackend = backend }
2098 mapM_ exposePackage (dph_packages backend)
2100 dph_packages DPHThis = []
2101 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2102 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2104 dphPackage :: DynFlags -> PackageId
2105 dphPackage dflags = case dphBackend dflags of
2106 DPHPar -> dphParPackageId
2107 DPHSeq -> dphSeqPackageId
2108 DPHThis -> thisPackage dflags
2110 setMainIs :: String -> DynP ()
2112 | not (null main_fn) && isLower (head main_fn)
2113 -- The arg looked like "Foo.Bar.baz"
2114 = upd $ \d -> d{ mainFunIs = Just main_fn,
2115 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2117 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2118 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2120 | otherwise -- The arg looked like "baz"
2121 = upd $ \d -> d{ mainFunIs = Just arg }
2123 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2125 -----------------------------------------------------------------------------
2126 -- Paths & Libraries
2128 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2130 -- -i on its own deletes the import paths
2131 addImportPath "" = upd (\s -> s{importPaths = []})
2132 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2136 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2139 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2141 addFrameworkPath p =
2142 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2144 #ifndef mingw32_TARGET_OS
2145 split_marker :: Char
2146 split_marker = ':' -- not configurable (ToDo)
2149 splitPathList :: String -> [String]
2150 splitPathList s = filter notNull (splitUp s)
2151 -- empty paths are ignored: there might be a trailing
2152 -- ':' in the initial list, for example. Empty paths can
2153 -- cause confusion when they are translated into -I options
2154 -- for passing to gcc.
2156 #ifndef mingw32_TARGET_OS
2157 splitUp xs = split split_marker xs
2159 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2161 -- That is, if "foo:bar:baz" is used, this interpreted as
2162 -- consisting of three entries, 'foo', 'bar', 'baz'.
2163 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2164 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2166 -- Notice that no attempt is made to fully replace the 'standard'
2167 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2168 -- that this will cause too much breakage for users & ':' will
2169 -- work fine even with DOS paths, if you're not insisting on being silly.
2172 splitUp (x:':':div:xs) | div `elem` dir_markers
2173 = ((x:':':div:p): splitUp rs)
2175 (p,rs) = findNextPath xs
2176 -- we used to check for existence of the path here, but that
2177 -- required the IO monad to be threaded through the command-line
2178 -- parser which is quite inconvenient. The
2179 splitUp xs = cons p (splitUp rs)
2181 (p,rs) = findNextPath xs
2186 -- will be called either when we've consumed nought or the
2187 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2188 -- finding the next split marker.
2190 case break (`elem` split_markers) xs of
2191 (p, _:ds) -> (p, ds)
2194 split_markers :: [Char]
2195 split_markers = [':', ';']
2197 dir_markers :: [Char]
2198 dir_markers = ['/', '\\']
2201 -- -----------------------------------------------------------------------------
2202 -- tmpDir, where we store temporary files.
2204 setTmpDir :: FilePath -> DynFlags -> DynFlags
2205 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2206 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2207 -- seem necessary now --SDM 7/2/2008
2209 -----------------------------------------------------------------------------
2212 setOptHpcDir :: String -> DynP ()
2213 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2215 -----------------------------------------------------------------------------
2216 -- Via-C compilation stuff
2218 -- There are some options that we need to pass to gcc when compiling
2219 -- Haskell code via C, but are only supported by recent versions of
2220 -- gcc. The configure script decides which of these options we need,
2221 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2222 -- read before each via-C compilation. The advantage of having these
2223 -- in a separate file is that the file can be created at install-time
2224 -- depending on the available gcc version, and even re-generated later
2225 -- if gcc is upgraded.
2227 -- The options below are not dependent on the version of gcc, only the
2230 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2231 [String]) -- for registerised HC compilations
2232 machdepCCOpts _dflags
2233 #if alpha_TARGET_ARCH
2235 #ifdef HAVE_THREADED_RTS_SUPPORT
2239 -- For now, to suppress the gcc warning "call-clobbered
2240 -- register used for global register variable", we simply
2241 -- disable all warnings altogether using the -w flag. Oh well.
2243 #elif hppa_TARGET_ARCH
2244 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2245 -- (very nice, but too bad the HP /usr/include files don't agree.)
2246 = ( ["-D_HPUX_SOURCE"], [] )
2248 #elif m68k_TARGET_ARCH
2249 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2250 -- popping of args to routines to be explicit; if we let things
2251 -- be deferred 'til after an STGJUMP, imminent death is certain!
2253 -- -fomit-frame-pointer : *don't*
2254 -- It's better to have a6 completely tied up being a frame pointer
2255 -- rather than let GCC pick random things to do with it.
2256 -- (If we want to steal a6, then we would try to do things
2257 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2258 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2260 #elif i386_TARGET_ARCH
2261 -- -fno-defer-pop : basically the same game as for m68k
2263 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2264 -- the fp (%ebp) for our register maps.
2265 = let n_regs = stolen_x86_regs _dflags
2268 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2271 "-fomit-frame-pointer",
2272 -- we want -fno-builtin, because when gcc inlines
2273 -- built-in functions like memcpy() it tends to
2274 -- run out of registers, requiring -monly-n-regs
2276 "-DSTOLEN_X86_REGS="++show n_regs ]
2279 #elif ia64_TARGET_ARCH
2280 = ( [], ["-fomit-frame-pointer", "-G0"] )
2282 #elif x86_64_TARGET_ARCH
2284 #if darwin_TARGET_OS
2289 ["-fomit-frame-pointer",
2290 "-fno-asynchronous-unwind-tables",
2291 -- the unwind tables are unnecessary for HC code,
2292 -- and get in the way of -split-objs. Another option
2293 -- would be to throw them away in the mangler, but this
2296 -- calling builtins like strlen() using the FFI can
2297 -- cause gcc to run out of regs, so use the external
2301 #elif sparc_TARGET_ARCH
2303 -- For now, to suppress the gcc warning "call-clobbered
2304 -- register used for global register variable", we simply
2305 -- disable all warnings altogether using the -w flag. Oh well.
2307 #elif powerpc_apple_darwin_TARGET
2309 -- Disable Apple's precompiling preprocessor. It's a great thing
2310 -- for "normal" programs, but it doesn't support register variable
2312 = ( [], ["-no-cpp-precomp"] )
2317 picCCOpts :: DynFlags -> [String]
2319 #if darwin_TARGET_OS
2320 -- Apple prefers to do things the other way round.
2321 -- PIC is on by default.
2322 -- -mdynamic-no-pic:
2323 -- Turn off PIC code generation.
2325 -- Don't generate "common" symbols - these are unwanted
2326 -- in dynamic libraries.
2329 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2331 = ["-mdynamic-no-pic"]
2332 #elif mingw32_TARGET_OS
2333 -- no -fPIC for Windows
2335 = ["-U __PIC__","-D__PIC__"]
2339 | opt_PIC || not opt_Static
2340 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2345 -- -----------------------------------------------------------------------------
2349 can_split = cSplitObjs == "YES"
2351 -- -----------------------------------------------------------------------------
2354 data Printable = String String
2355 | FromDynFlags (DynFlags -> String)
2357 compilerInfo :: [(String, Printable)]
2358 compilerInfo = [("Project name", String cProjectName),
2359 ("Project version", String cProjectVersion),
2360 ("Booter version", String cBooterVersion),
2361 ("Stage", String cStage),
2362 ("Interface file version", String cHscIfaceFileVersion),
2363 ("Have interpreter", String cGhcWithInterpreter),
2364 ("Object splitting", String cSplitObjs),
2365 ("Have native code generator", String cGhcWithNativeCodeGen),
2366 ("Support SMP", String cGhcWithSMP),
2367 ("Unregisterised", String cGhcUnregisterised),
2368 ("Tables next to code", String cGhcEnableTablesNextToCode),
2369 ("Win32 DLLs", String cEnableWin32DLLs),
2370 ("RTS ways", String cGhcRTSWays),
2371 ("Leading underscore", String cLeadingUnderscore),
2372 ("Debug on", String (show debugIsOn)),
2373 ("LibDir", FromDynFlags topDir)