5 -- (c) The University of Glasgow 2005
8 -- Most flags are dynamic flags, which means they can change from
9 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
10 -- multi-session GHC each session can be using different dynamic
11 -- flags. Dynamic flags can also be set at the prompt in GHCi.
13 -- * Dynamic flags and associated configuration types
16 HscTarget(..), isObjectTarget, defaultObjectTarget,
17 GhcMode(..), isOneShot,
18 GhcLink(..), isNoLink,
25 -- ** Manipulating DynFlags
26 defaultDynFlags, -- DynFlags
27 initDynFlags, -- DynFlags -> IO DynFlags
29 dopt, -- DynFlag -> DynFlags -> Bool
30 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
31 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
38 -- ** Parsing DynFlags
40 parseDynamicNoPackageFlags,
43 supportedLanguages, languageOptions,
45 -- ** DynFlag C compiler options
46 machdepCCOpts, picCCOpts,
48 -- * Configuration of the core-to-core passes
55 -- * Configuration of the stg-to-stg passes
59 -- * Compiler configuration suitable for display to the user
64 #include "HsVersions.h"
66 #ifndef OMIT_NATIVE_CODEGEN
71 import PrelNames ( mAIN )
72 #if defined(i386_TARGET_ARCH) || (!defined(mingw32_TARGET_OS) && !defined(darwin_TARGET_OS))
73 import StaticFlags ( opt_Static )
75 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
77 import {-# SOURCE #-} Packages (PackageState)
78 import DriverPhases ( Phase(..), phaseInputExt )
81 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
83 import UniqFM ( UniqFM )
85 import Maybes ( orElse )
90 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
93 import Control.Monad ( when )
97 import System.FilePath
98 import System.IO ( stderr, hPutChar )
100 -- -----------------------------------------------------------------------------
103 -- | Enumerates the simple on-or-off dynamic flags
109 | Opt_D_dump_cmmz_pretty
113 | Opt_D_dump_asm_native
114 | Opt_D_dump_asm_liveness
115 | Opt_D_dump_asm_coalesce
116 | Opt_D_dump_asm_regalloc
117 | Opt_D_dump_asm_regalloc_stages
118 | Opt_D_dump_asm_conflicts
119 | Opt_D_dump_asm_stats
120 | Opt_D_dump_asm_expanded
126 | Opt_D_dump_inlinings
127 | Opt_D_dump_rule_firings
128 | Opt_D_dump_occur_anal
132 | Opt_D_dump_simpl_iterations
133 | Opt_D_dump_simpl_phases
142 | Opt_D_dump_worker_wrapper
143 | Opt_D_dump_rn_trace
144 | Opt_D_dump_rn_stats
146 | Opt_D_dump_simpl_stats
147 | Opt_D_dump_tc_trace
148 | Opt_D_dump_if_trace
155 | Opt_D_verbose_core2core
156 | Opt_D_verbose_stg2stg
158 | Opt_D_dump_hi_diffs
159 | Opt_D_dump_minimal_imports
160 | Opt_D_dump_mod_cycles
161 | Opt_D_dump_view_pattern_commoning
162 | Opt_D_faststring_stats
163 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
164 | Opt_D_no_debug_output
170 | Opt_WarnIsError -- -Werror; makes warnings fatal
171 | Opt_WarnDuplicateExports
173 | Opt_WarnImplicitPrelude
174 | Opt_WarnIncompletePatterns
175 | Opt_WarnIncompletePatternsRecUpd
176 | Opt_WarnMissingFields
177 | Opt_WarnMissingMethods
178 | Opt_WarnMissingSigs
179 | Opt_WarnNameShadowing
180 | Opt_WarnOverlappingPatterns
181 | Opt_WarnSimplePatterns
182 | Opt_WarnTypeDefaults
183 | Opt_WarnMonomorphism
184 | Opt_WarnUnusedBinds
185 | Opt_WarnUnusedImports
186 | Opt_WarnUnusedMatches
187 | Opt_WarnWarningsDeprecations
188 | Opt_WarnDeprecatedFlags
189 | Opt_WarnDodgyExports
190 | Opt_WarnDodgyImports
193 | Opt_WarnUnrecognisedPragmas
194 | Opt_WarnDodgyForeignImports
195 | Opt_WarnLazyUnliftedBindings
196 | Opt_WarnUnusedDoBind
197 | Opt_WarnWrongDoBind
201 | Opt_OverlappingInstances
202 | Opt_UndecidableInstances
203 | Opt_IncoherentInstances
204 | Opt_MonomorphismRestriction
207 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
208 | Opt_ForeignFunctionInterface
209 | Opt_UnliftedFFITypes
210 | Opt_GHCForeignImportPrim
211 | Opt_PArr -- Syntactic support for parallel arrays
212 | Opt_Arrows -- Arrow-notation syntax
213 | Opt_TemplateHaskell
216 | Opt_Generics -- "Derivable type classes"
217 | Opt_ImplicitPrelude
218 | Opt_ScopedTypeVariables
222 | Opt_OverloadedStrings
223 | Opt_DisambiguateRecordFields
224 | Opt_RecordWildCards
230 | Opt_StandaloneDeriving
231 | Opt_DeriveDataTypeable
233 | Opt_DeriveTraversable
236 | Opt_TypeSynonymInstances
237 | Opt_FlexibleContexts
238 | Opt_FlexibleInstances
239 | Opt_ConstrainedClassMethods
240 | Opt_MultiParamTypeClasses
241 | Opt_FunctionalDependencies
243 | Opt_PolymorphicComponents
244 | Opt_ExistentialQuantification
248 | Opt_ParallelListComp
249 | Opt_TransformListComp
250 | Opt_GeneralizedNewtypeDeriving
252 | Opt_PostfixOperators
255 | Opt_LiberalTypeSynonyms
258 | Opt_ImpredicativeTypes
261 | Opt_NewQualifiedOperators
263 | Opt_PrintExplicitForalls
268 | Opt_StaticArgumentTransformation
272 | Opt_IgnoreInterfacePragmas
273 | Opt_OmitInterfacePragmas
274 | Opt_DoLambdaEtaExpansion
278 | Opt_UnboxStrictFields
281 | Opt_InlineIfEnoughArgs
282 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
284 | Opt_RegsGraph -- do graph coloring register allocation
285 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
288 | Opt_AutoSccsOnAllToplevs
289 | Opt_AutoSccsOnExportedToplevs
290 | Opt_AutoSccsOnIndividualCafs
298 | Opt_ExcessPrecision
299 | Opt_EagerBlackHoling
300 | Opt_ReadUserPackageConf
304 | Opt_HideAllPackages
305 | Opt_PrintBindResult
309 | Opt_BreakOnException
311 | Opt_PrintEvldWithShow
312 | Opt_PrintBindContents
315 | Opt_EmitExternalCore
321 | Opt_ConvertToZipCfgAndBack
322 | Opt_AutoLinkPackages
323 | Opt_ImplicitImportQualified
332 | Opt_KeepRawTokenStream
336 -- | Contains not only a collection of 'DynFlag's but also a plethora of
337 -- information relating to the compilation of a single file or GHC session
338 data DynFlags = DynFlags {
341 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
342 stgToDo :: Maybe [StgToDo], -- similarly
343 hscTarget :: HscTarget,
344 hscOutName :: String, -- ^ Name of the output file
345 extCoreName :: String, -- ^ Name of the .hcr output file
346 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
347 optLevel :: Int, -- ^ Optimisation level
348 simplPhases :: Int, -- ^ Number of simplifier phases
349 maxSimplIterations :: Int, -- ^ Max simplifier iterations
350 shouldDumpSimplPhase :: SimplifierMode -> Bool,
351 ruleCheck :: Maybe String,
353 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
354 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
355 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
357 #ifndef OMIT_NATIVE_CODEGEN
358 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
360 stolen_x86_regs :: Int,
361 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
362 importPaths :: [FilePath],
364 mainFunIs :: Maybe String,
365 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
367 dphBackend :: DPHBackend,
369 thisPackage :: PackageId, -- ^ name of package currently being compiled
372 wayNames :: [WayName], -- ^ Way flags from the command line
373 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
374 rtsBuildTag :: String, -- ^ The RTS \"way\"
376 -- For object splitting
377 splitInfo :: Maybe (String,Int),
380 objectDir :: Maybe String,
381 hiDir :: Maybe String,
382 stubDir :: Maybe String,
388 outputFile :: Maybe String,
389 outputHi :: Maybe String,
390 dynLibLoader :: DynLibLoader,
392 -- | This is set by 'DriverPipeline.runPipeline' based on where
393 -- its output is going.
394 dumpPrefix :: Maybe FilePath,
396 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
397 -- Set by @-ddump-file-prefix@
398 dumpPrefixForce :: Maybe FilePath,
400 includePaths :: [String],
401 libraryPaths :: [String],
402 frameworkPaths :: [String], -- used on darwin only
403 cmdlineFrameworks :: [String], -- ditto
404 tmpDir :: String, -- no trailing '/'
406 ghcUsagePath :: FilePath, -- Filled in by SysTools
407 ghciUsagePath :: FilePath, -- ditto
409 hpcDir :: String, -- ^ Path to store the .mix files
411 -- options for particular phases
419 opt_windres :: [String],
421 -- commands for particular phases
423 pgm_P :: (String,[Option]),
425 pgm_c :: (String,[Option]),
426 pgm_m :: (String,[Option]),
427 pgm_s :: (String,[Option]),
428 pgm_a :: (String,[Option]),
429 pgm_l :: (String,[Option]),
430 pgm_dll :: (String,[Option]),
432 pgm_sysman :: String,
433 pgm_windres :: String,
436 depMakefile :: FilePath,
437 depIncludePkgDeps :: Bool,
438 depExcludeMods :: [ModuleName],
439 depSuffixes :: [String],
442 extraPkgConfs :: [FilePath],
443 topDir :: FilePath, -- filled in by SysTools
444 systemPackageConfig :: FilePath, -- ditto
445 -- ^ The @-package-conf@ flags given on the command line, in the order
448 packageFlags :: [PackageFlag],
449 -- ^ The @-package@ and @-hide-package@ flags from the command-line
452 -- NB. do not modify this field, it is calculated by
453 -- Packages.initPackages and Packages.updatePackages.
454 pkgDatabase :: Maybe (UniqFM PackageConfig),
455 pkgState :: PackageState,
458 -- These have to be IORefs, because the defaultCleanupHandler needs to
459 -- know what to clean when an exception happens
460 filesToClean :: IORef [FilePath],
461 dirsToClean :: IORef (FiniteMap FilePath FilePath),
466 -- | Message output action: use "ErrUtils" instead of this if you can
467 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
469 haddockOptions :: Maybe String
472 -- | The target code type of the compilation (if any).
474 -- Whenever you change the target, also make sure to set 'ghcLink' to
475 -- something sensible.
477 -- 'HscNothing' can be used to avoid generating any output, however, note
480 -- * This will not run the desugaring step, thus no warnings generated in
481 -- this step will be output. In particular, this includes warnings related
482 -- to pattern matching. You can run the desugarer manually using
483 -- 'GHC.desugarModule'.
485 -- * If a program uses Template Haskell the typechecker may try to run code
486 -- from an imported module. This will fail if no code has been generated
487 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
488 -- whether this might be the case and choose to either switch to a
489 -- different target or avoid typechecking such modules. (The latter may
490 -- preferable for security reasons.)
493 = HscC -- ^ Generate C code.
494 | HscAsm -- ^ Generate assembly using the native code generator.
495 | HscJava -- ^ Generate Java bytecode.
496 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
497 | HscNothing -- ^ Don't generate any code. See notes above.
500 -- | Will this target result in an object file on the disk?
501 isObjectTarget :: HscTarget -> Bool
502 isObjectTarget HscC = True
503 isObjectTarget HscAsm = True
504 isObjectTarget _ = False
506 -- | The 'GhcMode' tells us whether we're doing multi-module
507 -- compilation (controlled via the "GHC" API) or one-shot
508 -- (single-module) compilation. This makes a difference primarily to
509 -- the "Finder": in one-shot mode we look for interface files for
510 -- imported modules, but in multi-module mode we look for source files
511 -- in order to check whether they need to be recompiled.
513 = CompManager -- ^ @\-\-make@, GHCi, etc.
514 | OneShot -- ^ @ghc -c Foo.hs@
515 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
518 instance Outputable GhcMode where
519 ppr CompManager = ptext (sLit "CompManager")
520 ppr OneShot = ptext (sLit "OneShot")
521 ppr MkDepend = ptext (sLit "MkDepend")
523 isOneShot :: GhcMode -> Bool
524 isOneShot OneShot = True
525 isOneShot _other = False
527 -- | What to do in the link step, if there is one.
529 = NoLink -- ^ Don't link at all
530 | LinkBinary -- ^ Link object code into a binary
531 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
532 -- bytecode and object code).
533 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
536 isNoLink :: GhcLink -> Bool
537 isNoLink NoLink = True
540 -- Is it worth evaluating this Bool and caching it in the DynFlags value
541 -- during initDynFlags?
542 doingTickyProfiling :: DynFlags -> Bool
543 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
546 = ExposePackage String
548 | IgnorePackage String
551 defaultHscTarget :: HscTarget
552 defaultHscTarget = defaultObjectTarget
554 -- | The 'HscTarget' value corresponding to the default way to create
555 -- object files on the current platform.
556 defaultObjectTarget :: HscTarget
558 | cGhcWithNativeCodeGen == "YES" = HscAsm
563 | Wrapped (Maybe String)
567 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
568 initDynFlags :: DynFlags -> IO DynFlags
569 initDynFlags dflags = do
570 -- someday these will be dynamic flags
571 ways <- readIORef v_Ways
572 build_tag <- readIORef v_Build_tag
573 rts_build_tag <- readIORef v_RTS_Build_tag
574 refFilesToClean <- newIORef []
575 refDirsToClean <- newIORef emptyFM
578 buildTag = build_tag,
579 rtsBuildTag = rts_build_tag,
580 filesToClean = refFilesToClean,
581 dirsToClean = refDirsToClean
584 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
585 -- and must be fully initialized by 'GHC.newSession' first.
586 defaultDynFlags :: DynFlags
589 ghcMode = CompManager,
590 ghcLink = LinkBinary,
593 hscTarget = defaultHscTarget,
599 maxSimplIterations = 4,
600 shouldDumpSimplPhase = const False,
602 specConstrThreshold = Just 200,
603 specConstrCount = Just 3,
604 liberateCaseThreshold = Just 200,
605 #ifndef OMIT_NATIVE_CODEGEN
606 targetPlatform = defaultTargetPlatform,
609 cmdlineHcIncludes = [],
613 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
617 thisPackage = mainPackageId,
623 objectSuf = phaseInputExt StopLn,
624 hcSuf = phaseInputExt HCc,
627 outputFile = Nothing,
629 dynLibLoader = SystemDependent,
630 dumpPrefix = Nothing,
631 dumpPrefixForce = Nothing,
635 cmdlineFrameworks = [],
636 tmpDir = cDEFAULT_TMPDIR,
642 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
653 pkgDatabase = Nothing,
654 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
655 wayNames = panic "defaultDynFlags: No wayNames",
656 buildTag = panic "defaultDynFlags: No buildTag",
657 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
659 -- initSysTools fills all these in
660 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
661 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
662 topDir = panic "defaultDynFlags: No topDir",
663 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
664 pgm_L = panic "defaultDynFlags: No pgm_L",
665 pgm_P = panic "defaultDynFlags: No pgm_P",
666 pgm_F = panic "defaultDynFlags: No pgm_F",
667 pgm_c = panic "defaultDynFlags: No pgm_c",
668 pgm_m = panic "defaultDynFlags: No pgm_m",
669 pgm_s = panic "defaultDynFlags: No pgm_s",
670 pgm_a = panic "defaultDynFlags: No pgm_a",
671 pgm_l = panic "defaultDynFlags: No pgm_l",
672 pgm_dll = panic "defaultDynFlags: No pgm_dll",
673 pgm_T = panic "defaultDynFlags: No pgm_T",
674 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
675 pgm_windres = panic "defaultDynFlags: No pgm_windres",
676 -- end of initSysTools values
678 depMakefile = "Makefile",
679 depIncludePkgDeps = False,
682 -- end of ghc -M values
683 filesToClean = panic "defaultDynFlags: No filesToClean",
684 dirsToClean = panic "defaultDynFlags: No dirsToClean",
685 haddockOptions = Nothing,
687 Opt_AutoLinkPackages,
688 Opt_ReadUserPackageConf,
690 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
691 -- behaviour the default, to see if anyone notices
695 Opt_MonomorphismRestriction,
705 Opt_PrintBindContents
707 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
708 -- The default -O0 options
711 log_action = \severity srcSpan style msg ->
713 SevInfo -> printErrs (msg style)
714 SevFatal -> printErrs (msg style)
717 printErrs ((mkLocMessage srcSpan msg) style)
718 -- careful (#2302): printErrs prints in UTF-8, whereas
719 -- converting to string first and using hPutStr would
720 -- just emit the low 8 bits of each unicode char.
727 0 | print errors & warnings only
728 1 | minimal verbosity: print "compiling M ... done." for each module.
729 2 | equivalent to -dshow-passes
730 3 | equivalent to existing "ghc -v"
731 4 | "ghc -v -ddump-most"
732 5 | "ghc -v -ddump-all"
735 -- | Test whether a 'DynFlag' is set
736 dopt :: DynFlag -> DynFlags -> Bool
737 dopt f dflags = f `elem` (flags dflags)
740 dopt_set :: DynFlags -> DynFlag -> DynFlags
741 dopt_set dfs f = dfs{ flags = f : flags dfs }
743 -- | Unset a 'DynFlag'
744 dopt_unset :: DynFlags -> DynFlag -> DynFlags
745 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
747 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
748 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
749 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
750 -> [a] -- ^ Correctly ordered extracted options
751 getOpts dflags opts = reverse (opts dflags)
752 -- We add to the options from the front, so we need to reverse the list
754 -- | Gets the verbosity flag for the current verbosity level. This is fed to
755 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
756 getVerbFlag :: DynFlags -> String
758 | verbosity dflags >= 3 = "-v"
761 setObjectDir, setHiDir, setStubDir, setOutputDir,
762 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
763 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
764 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
765 addCmdlineFramework, addHaddockOpts
766 :: String -> DynFlags -> DynFlags
767 setOutputFile, setOutputHi, setDumpPrefixForce
768 :: Maybe String -> DynFlags -> DynFlags
770 setObjectDir f d = d{ objectDir = Just f}
771 setHiDir f d = d{ hiDir = Just f}
772 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
773 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
774 -- \#included from the .hc file when compiling with -fvia-C.
775 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
777 setObjectSuf f d = d{ objectSuf = f}
778 setHiSuf f d = d{ hiSuf = f}
779 setHcSuf f d = d{ hcSuf = f}
781 setOutputFile f d = d{ outputFile = f}
782 setOutputHi f d = d{ outputHi = f}
784 parseDynLibLoaderMode f d =
786 ("deploy", "") -> d{ dynLibLoader = Deployable }
787 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
788 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
789 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
790 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
791 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
793 setDumpPrefixForce f d = d { dumpPrefixForce = f}
795 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
796 -- Config.hs should really use Option.
797 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
799 setPgmL f d = d{ pgm_L = f}
800 setPgmF f d = d{ pgm_F = f}
801 setPgmc f d = d{ pgm_c = (f,[])}
802 setPgmm f d = d{ pgm_m = (f,[])}
803 setPgms f d = d{ pgm_s = (f,[])}
804 setPgma f d = d{ pgm_a = (f,[])}
805 setPgml f d = d{ pgm_l = (f,[])}
806 setPgmdll f d = d{ pgm_dll = (f,[])}
807 setPgmwindres f d = d{ pgm_windres = f}
809 addOptL f d = d{ opt_L = f : opt_L d}
810 addOptP f d = d{ opt_P = f : opt_P d}
811 addOptF f d = d{ opt_F = f : opt_F d}
812 addOptc f d = d{ opt_c = f : opt_c d}
813 addOptm f d = d{ opt_m = f : opt_m d}
814 addOpta f d = d{ opt_a = f : opt_a d}
815 addOptl f d = d{ opt_l = f : opt_l d}
816 addOptwindres f d = d{ opt_windres = f : opt_windres d}
818 setDepMakefile :: FilePath -> DynFlags -> DynFlags
819 setDepMakefile f d = d { depMakefile = deOptDep f }
821 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
822 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
824 addDepExcludeMod :: String -> DynFlags -> DynFlags
826 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
828 addDepSuffix :: FilePath -> DynFlags -> DynFlags
829 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
832 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
833 -- we need to strip the "-optdep" off of the arg
834 deOptDep :: String -> String
835 deOptDep x = case stripPrefix "-optdep" x of
839 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
841 addHaddockOpts f d = d{ haddockOptions = Just f}
843 -- -----------------------------------------------------------------------------
844 -- Command-line options
846 -- | When invoking external tools as part of the compilation pipeline, we
847 -- pass these a sequence of options on the command-line. Rather than
848 -- just using a list of Strings, we use a type that allows us to distinguish
849 -- between filepaths and 'other stuff'. The reason for this is that
850 -- this type gives us a handle on transforming filenames, and filenames only,
851 -- to whatever format they're expected to be on a particular platform.
853 = FileOption -- an entry that _contains_ filename(s) / filepaths.
854 String -- a non-filepath prefix that shouldn't be
855 -- transformed (e.g., "/out=")
856 String -- the filepath/filename portion
859 showOpt :: Option -> String
860 showOpt (FileOption pre f) = pre ++ f
861 showOpt (Option s) = s
863 -----------------------------------------------------------------------------
864 -- Setting the optimisation level
866 updOptLevel :: Int -> DynFlags -> DynFlags
867 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
869 = dfs2{ optLevel = final_n }
871 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
872 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
873 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
875 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
876 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
878 optLevelFlags :: [([Int], DynFlag)]
880 = [ ([0], Opt_IgnoreInterfacePragmas)
881 , ([0], Opt_OmitInterfacePragmas)
883 , ([1,2], Opt_IgnoreAsserts)
884 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
886 , ([1,2], Opt_DoEtaReduction)
887 , ([1,2], Opt_CaseMerge)
888 , ([1,2], Opt_Strictness)
890 , ([1,2], Opt_FullLaziness)
892 , ([2], Opt_LiberateCase)
893 , ([2], Opt_SpecConstr)
895 -- , ([2], Opt_StaticArgumentTransformation)
896 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
897 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
898 -- several improvements to the heuristics, and I'm concerned that without
899 -- those changes SAT will interfere with some attempts to write "high
900 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
901 -- this year. In particular, the version in HEAD lacks the tail call
902 -- criterion, so many things that look like reasonable loops will be
903 -- turned into functions with extra (unneccesary) thunk creation.
905 , ([0,1,2], Opt_DoLambdaEtaExpansion)
906 -- This one is important for a tiresome reason:
907 -- we want to make sure that the bindings for data
908 -- constructors are eta-expanded. This is probably
909 -- a good thing anyway, but it seems fragile.
912 -- -----------------------------------------------------------------------------
913 -- Standard sets of warning options
915 standardWarnings :: [DynFlag]
917 = [ Opt_WarnWarningsDeprecations,
918 Opt_WarnDeprecatedFlags,
919 Opt_WarnUnrecognisedPragmas,
920 Opt_WarnOverlappingPatterns,
921 Opt_WarnMissingFields,
922 Opt_WarnMissingMethods,
923 Opt_WarnDuplicateExports,
924 Opt_WarnLazyUnliftedBindings,
925 Opt_WarnDodgyForeignImports,
929 minusWOpts :: [DynFlag]
931 = standardWarnings ++
932 [ Opt_WarnUnusedBinds,
933 Opt_WarnUnusedMatches,
934 Opt_WarnUnusedImports,
935 Opt_WarnIncompletePatterns,
936 Opt_WarnDodgyExports,
940 minusWallOpts :: [DynFlag]
943 [ Opt_WarnTypeDefaults,
944 Opt_WarnNameShadowing,
951 -- minuswRemovesOpts should be every warning option
952 minuswRemovesOpts :: [DynFlag]
955 [Opt_WarnImplicitPrelude,
956 Opt_WarnIncompletePatternsRecUpd,
957 Opt_WarnSimplePatterns,
958 Opt_WarnMonomorphism,
959 Opt_WarnUnrecognisedPragmas,
963 -- -----------------------------------------------------------------------------
964 -- CoreToDo: abstraction of core-to-core passes to run.
966 data CoreToDo -- These are diff core-to-core passes,
967 -- which may be invoked in any order,
968 -- as many times as you like.
970 = CoreDoSimplify -- The core-to-core simplifier.
973 -- Each run of the simplifier can take a different
974 -- set of simplifier-specific flags.
976 | CoreDoFloatOutwards FloatOutSwitches
981 | CoreDoWorkerWrapper
984 | CoreDoOldStrictness
987 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
988 -- matching this string
989 | CoreDoVectorisation PackageId
990 | CoreDoNothing -- Useful when building up
991 | CoreDoPasses [CoreToDo] -- lists of these things
994 data SimplifierMode -- See comments in SimplMonad
996 | SimplPhase Int [String]
998 instance Outputable SimplifierMode where
999 ppr SimplGently = ptext (sLit "gentle")
1000 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1003 data SimplifierSwitch
1004 = MaxSimplifierIterations Int
1008 data FloatOutSwitches = FloatOutSwitches {
1009 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1010 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1011 -- even if they do not escape a lambda
1014 instance Outputable FloatOutSwitches where
1015 ppr = pprFloatOutSwitches
1017 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1018 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1019 <+> pp_not (floatOutConstants sw) <+> text "constants"
1022 pp_not False = text "not"
1024 -- | Switches that specify the minimum amount of floating out
1025 -- gentleFloatOutSwitches :: FloatOutSwitches
1026 -- gentleFloatOutSwitches = FloatOutSwitches False False
1028 -- | Switches that do not specify floating out of lambdas, just of constants
1029 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1030 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1033 -- The core-to-core pass ordering is derived from the DynFlags:
1034 runWhen :: Bool -> CoreToDo -> CoreToDo
1035 runWhen True do_this = do_this
1036 runWhen False _ = CoreDoNothing
1038 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1039 runMaybe (Just x) f = f x
1040 runMaybe Nothing _ = CoreDoNothing
1042 getCoreToDo :: DynFlags -> [CoreToDo]
1044 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1045 | otherwise = core_todo
1047 opt_level = optLevel dflags
1048 phases = simplPhases dflags
1049 max_iter = maxSimplIterations dflags
1050 strictness = dopt Opt_Strictness dflags
1051 full_laziness = dopt Opt_FullLaziness dflags
1052 cse = dopt Opt_CSE dflags
1053 spec_constr = dopt Opt_SpecConstr dflags
1054 liberate_case = dopt Opt_LiberateCase dflags
1055 rule_check = ruleCheck dflags
1056 static_args = dopt Opt_StaticArgumentTransformation dflags
1058 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1060 simpl_phase phase names iter
1062 [ CoreDoSimplify (SimplPhase phase names) [
1063 MaxSimplifierIterations iter
1065 maybe_rule_check phase
1069 = runWhen (dopt Opt_Vectorise dflags)
1070 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1073 -- By default, we have 2 phases before phase 0.
1075 -- Want to run with inline phase 2 after the specialiser to give
1076 -- maximum chance for fusion to work before we inline build/augment
1077 -- in phase 1. This made a difference in 'ansi' where an
1078 -- overloaded function wasn't inlined till too late.
1080 -- Need phase 1 so that build/augment get
1081 -- inlined. I found that spectral/hartel/genfft lost some useful
1082 -- strictness in the function sumcode' if augment is not inlined
1083 -- before strictness analysis runs
1084 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1085 | phase <- [phases, phases-1 .. 1] ]
1088 -- initial simplify: mk specialiser happy: minimum effort please
1089 simpl_gently = CoreDoSimplify SimplGently [
1090 -- Simplify "gently"
1091 -- Don't inline anything till full laziness has bitten
1092 -- In particular, inlining wrappers inhibits floating
1093 -- e.g. ...(case f x of ...)...
1094 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1095 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1096 -- and now the redex (f x) isn't floatable any more
1097 -- Similarly, don't apply any rules until after full
1098 -- laziness. Notably, list fusion can prevent floating.
1100 NoCaseOfCase, -- Don't do case-of-case transformations.
1101 -- This makes full laziness work better
1102 MaxSimplifierIterations max_iter
1106 if opt_level == 0 then
1108 simpl_phase 0 ["final"] max_iter]
1109 else {- opt_level >= 1 -} [
1111 -- We want to do the static argument transform before full laziness as it
1112 -- may expose extra opportunities to float things outwards. However, to fix
1113 -- up the output of the transformation we need at do at least one simplify
1114 -- after this before anything else
1115 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1117 -- We run vectorisation here for now, but we might also try to run
1121 -- initial simplify: mk specialiser happy: minimum effort please
1124 -- Specialisation is best done before full laziness
1125 -- so that overloaded functions have all their dictionary lambdas manifest
1128 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1129 -- Was: gentleFloatOutSwitches
1130 -- I have no idea why, but not floating constants to top level is
1131 -- very bad in some cases.
1132 -- Notably: p_ident in spectral/rewrite
1133 -- Changing from "gentle" to "constantsOnly" improved
1134 -- rewrite's allocation by 19%, and made 0.0% difference
1135 -- to any other nofib benchmark
1141 -- Phase 0: allow all Ids to be inlined now
1142 -- This gets foldr inlined before strictness analysis
1144 -- At least 3 iterations because otherwise we land up with
1145 -- huge dead expressions because of an infelicity in the
1147 -- let k = BIG in foldr k z xs
1148 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1149 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1151 simpl_phase 0 ["main"] (max max_iter 3),
1154 #ifdef OLD_STRICTNESS
1155 CoreDoOldStrictness,
1157 runWhen strictness (CoreDoPasses [
1159 CoreDoWorkerWrapper,
1161 simpl_phase 0 ["post-worker-wrapper"] max_iter
1164 runWhen full_laziness
1165 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1166 -- nofib/spectral/hartel/wang doubles in speed if you
1167 -- do full laziness late in the day. It only happens
1168 -- after fusion and other stuff, so the early pass doesn't
1169 -- catch it. For the record, the redex is
1170 -- f_el22 (f_el21 r_midblock)
1173 runWhen cse CoreCSE,
1174 -- We want CSE to follow the final full-laziness pass, because it may
1175 -- succeed in commoning up things floated out by full laziness.
1176 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1182 -- Case-liberation for -O2. This should be after
1183 -- strictness analysis and the simplification which follows it.
1184 runWhen liberate_case (CoreDoPasses [
1186 simpl_phase 0 ["post-liberate-case"] max_iter
1187 ]), -- Run the simplifier after LiberateCase to vastly
1188 -- reduce the possiblility of shadowing
1189 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1191 runWhen spec_constr CoreDoSpecConstr,
1195 -- Final clean-up simplification:
1196 simpl_phase 0 ["final"] max_iter
1199 -- -----------------------------------------------------------------------------
1200 -- StgToDo: abstraction of stg-to-stg passes to run.
1203 = StgDoMassageForProfiling -- should be (next to) last
1204 -- There's also setStgVarInfo, but its absolute "lastness"
1205 -- is so critical that it is hardwired in (no flag).
1208 getStgToDo :: DynFlags -> [StgToDo]
1210 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1213 stg_stats = dopt Opt_StgStats dflags
1215 todo1 = if stg_stats then [D_stg_stats] else []
1217 todo2 | WayProf `elem` wayNames dflags
1218 = StgDoMassageForProfiling : todo1
1222 -- -----------------------------------------------------------------------------
1225 allFlags :: [String]
1226 allFlags = map ('-':) $
1227 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1228 map ("fno-"++) flags ++
1229 map ("f"++) flags ++
1230 map ("X"++) supportedLanguages ++
1231 map ("XNo"++) supportedLanguages
1232 where ok (PrefixPred _ _) = False
1234 flags = [ name | (name, _, _) <- fFlags ]
1236 dynamic_flags :: [Flag DynP]
1238 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1239 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1240 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1241 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1242 , Flag "v" (OptIntSuffix setVerbosity) Supported
1244 ------- Specific phases --------------------------------------------
1245 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1246 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1247 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1248 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1249 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1250 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1251 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1252 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1253 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1254 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1256 , Flag "optL" (HasArg (upd . addOptL)) Supported
1257 , Flag "optP" (HasArg (upd . addOptP)) Supported
1258 , Flag "optF" (HasArg (upd . addOptF)) Supported
1259 , Flag "optc" (HasArg (upd . addOptc)) Supported
1260 , Flag "optm" (HasArg (upd . addOptm)) Supported
1261 , Flag "opta" (HasArg (upd . addOpta)) Supported
1262 , Flag "optl" (HasArg (upd . addOptl)) Supported
1263 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1266 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1269 -------- ghc -M -----------------------------------------------------
1270 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1271 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1272 (Deprecated "Use -dep-suffix instead")
1273 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1274 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1275 (Deprecated "Use -dep-makefile instead")
1276 , Flag "optdep-w" (NoArg (return ()))
1277 (Deprecated "-optdep-w doesn't do anything")
1278 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1279 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1280 (Deprecated "Use -include-pkg-deps instead")
1281 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1282 (Deprecated "Use -include-pkg-deps instead")
1283 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1284 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1285 (Deprecated "Use -exclude-module instead")
1286 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1287 (Deprecated "Use -exclude-module instead")
1289 -------- Linking ----------------------------------------------------
1290 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1292 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1293 (Deprecated "Use -c instead")
1294 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1296 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1299 ------- Libraries ---------------------------------------------------
1300 , Flag "L" (Prefix addLibraryPath ) Supported
1301 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1303 ------- Frameworks --------------------------------------------------
1304 -- -framework-path should really be -F ...
1305 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1306 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1308 ------- Output Redirection ------------------------------------------
1309 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1310 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1311 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1312 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1313 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1314 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1315 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1316 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1317 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1318 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1319 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1322 ------- Keeping temporary files -------------------------------------
1323 -- These can be singular (think ghc -c) or plural (think ghc --make)
1324 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1325 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1326 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1327 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1328 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1329 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1330 -- This only makes sense as plural
1331 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1333 ------- Miscellaneous ----------------------------------------------
1334 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1335 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1336 , Flag "main-is" (SepArg setMainIs ) Supported
1337 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1338 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1339 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1341 ------- recompilation checker --------------------------------------
1342 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1343 (Deprecated "Use -fno-force-recomp instead")
1344 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1345 (Deprecated "Use -fforce-recomp instead")
1347 ------ HsCpp opts ---------------------------------------------------
1348 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1349 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1351 ------- Include/Import Paths ----------------------------------------
1352 , Flag "I" (Prefix addIncludePath) Supported
1353 , Flag "i" (OptPrefix addImportPath ) Supported
1355 ------ Debugging ----------------------------------------------------
1356 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1358 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1360 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1362 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1364 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1366 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1368 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1370 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1372 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1374 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1376 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1378 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1380 , Flag "ddump-asm-regalloc-stages"
1381 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1383 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1385 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1387 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1389 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1391 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1393 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1395 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1397 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1399 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1401 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1403 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1405 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1407 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1409 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1411 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1413 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1415 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1417 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1419 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1421 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1423 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1425 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1427 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1429 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1431 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1433 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1435 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1437 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1439 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1441 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1443 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1445 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1447 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1449 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1451 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1453 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1455 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1457 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1459 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1461 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1463 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1465 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1467 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1469 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1472 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1474 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1476 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1478 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1480 , Flag "dshow-passes"
1481 (NoArg (do forceRecompile
1482 setVerbosity (Just 2)))
1484 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1487 ------ Machine dependant (-m<blah>) stuff ---------------------------
1489 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1491 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1493 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1496 ------ Warning opts -------------------------------------------------
1497 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1499 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1501 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1503 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1505 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1506 (Deprecated "Use -w instead")
1507 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1510 ------ Optimisation flags ------------------------------------------
1511 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1512 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1513 (Deprecated "Use -O0 instead")
1514 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1515 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1517 -- If the number is missing, use 1
1519 , Flag "fsimplifier-phases"
1520 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1522 , Flag "fmax-simplifier-iterations"
1523 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1526 , Flag "fspec-constr-threshold"
1527 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1529 , Flag "fno-spec-constr-threshold"
1530 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1532 , Flag "fspec-constr-count"
1533 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1535 , Flag "fno-spec-constr-count"
1536 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1538 , Flag "fliberate-case-threshold"
1539 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1541 , Flag "fno-liberate-case-threshold"
1542 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1545 , Flag "frule-check"
1546 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1548 , Flag "fcontext-stack"
1549 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1552 ------ Profiling ----------------------------------------------------
1554 -- XXX Should the -f* flags be deprecated?
1555 -- They don't seem to be documented
1556 , Flag "fauto-sccs-on-all-toplevs"
1557 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1560 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1562 , Flag "no-auto-all"
1563 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1565 , Flag "fauto-sccs-on-exported-toplevs"
1566 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1569 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1572 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1574 , Flag "fauto-sccs-on-individual-cafs"
1575 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1578 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1581 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1584 ------ DPH flags ----------------------------------------------------
1587 (NoArg (setDPHBackend DPHSeq))
1590 (NoArg (setDPHBackend DPHPar))
1593 (NoArg (setDPHBackend DPHThis))
1596 ------ Compiler flags -----------------------------------------------
1598 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1599 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1600 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1602 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1603 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1604 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1606 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1608 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1611 ++ map (mkFlag True "f" setDynFlag ) fFlags
1612 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1613 ++ map (mkFlag True "X" setDynFlag ) xFlags
1614 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1616 package_flags :: [Flag DynP]
1618 ------- Packages ----------------------------------------------------
1619 Flag "package-conf" (HasArg extraPkgConf_) Supported
1620 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1622 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1623 , Flag "package" (HasArg exposePackage) Supported
1624 , Flag "hide-package" (HasArg hidePackage) Supported
1625 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1627 , Flag "ignore-package" (HasArg ignorePackage)
1629 , Flag "syslib" (HasArg exposePackage)
1630 (Deprecated "Use -package instead")
1633 mkFlag :: Bool -- ^ True <=> it should be turned on
1634 -> String -- ^ The flag prefix
1635 -> (DynFlag -> DynP ())
1636 -> (String, DynFlag, Bool -> Deprecated)
1638 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1639 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1641 deprecatedForLanguage :: String -> Bool -> Deprecated
1642 deprecatedForLanguage lang turn_on
1643 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1645 flag | turn_on = lang
1646 | otherwise = "No"++lang
1648 useInstead :: String -> Bool -> Deprecated
1649 useInstead flag turn_on
1650 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1652 no = if turn_on then "" else "no-"
1654 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1655 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1657 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1658 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1659 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1660 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1661 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1662 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1663 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1664 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1665 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1666 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1667 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1668 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1669 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1670 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1671 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1672 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1673 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1674 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1675 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1676 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1677 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1678 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1679 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1680 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1681 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1682 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1683 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1684 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1685 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1686 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1687 ( "strictness", Opt_Strictness, const Supported ),
1688 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1689 ( "full-laziness", Opt_FullLaziness, const Supported ),
1690 ( "liberate-case", Opt_LiberateCase, const Supported ),
1691 ( "spec-constr", Opt_SpecConstr, const Supported ),
1692 ( "cse", Opt_CSE, const Supported ),
1693 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1694 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1695 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1696 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1697 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1698 ( "case-merge", Opt_CaseMerge, const Supported ),
1699 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1700 ( "method-sharing", Opt_MethodSharing, const Supported ),
1701 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1702 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1703 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1704 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1705 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1706 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1707 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1708 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1709 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1710 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1711 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1712 ( "break-on-error", Opt_BreakOnError, const Supported ),
1713 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1714 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1715 ( "run-cps", Opt_RunCPS, const Supported ),
1716 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1717 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1718 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1719 ( "vectorise", Opt_Vectorise, const Supported ),
1720 ( "regs-graph", Opt_RegsGraph, const Supported ),
1721 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1722 ( "th", Opt_TemplateHaskell,
1723 deprecatedForLanguage "TemplateHaskell" ),
1724 ( "fi", Opt_ForeignFunctionInterface,
1725 deprecatedForLanguage "ForeignFunctionInterface" ),
1726 ( "ffi", Opt_ForeignFunctionInterface,
1727 deprecatedForLanguage "ForeignFunctionInterface" ),
1728 ( "arrows", Opt_Arrows,
1729 deprecatedForLanguage "Arrows" ),
1730 ( "generics", Opt_Generics,
1731 deprecatedForLanguage "Generics" ),
1732 ( "implicit-prelude", Opt_ImplicitPrelude,
1733 deprecatedForLanguage "ImplicitPrelude" ),
1734 ( "bang-patterns", Opt_BangPatterns,
1735 deprecatedForLanguage "BangPatterns" ),
1736 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1737 deprecatedForLanguage "MonomorphismRestriction" ),
1738 ( "mono-pat-binds", Opt_MonoPatBinds,
1739 deprecatedForLanguage "MonoPatBinds" ),
1740 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1741 deprecatedForLanguage "ExtendedDefaultRules" ),
1742 ( "implicit-params", Opt_ImplicitParams,
1743 deprecatedForLanguage "ImplicitParams" ),
1744 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1745 deprecatedForLanguage "ScopedTypeVariables" ),
1747 deprecatedForLanguage "PArr" ),
1748 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1749 deprecatedForLanguage "OverlappingInstances" ),
1750 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1751 deprecatedForLanguage "UndecidableInstances" ),
1752 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1753 deprecatedForLanguage "IncoherentInstances" ),
1754 ( "gen-manifest", Opt_GenManifest, const Supported ),
1755 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1756 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1757 ( "shared-implib", Opt_SharedImplib, const Supported ),
1758 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1761 supportedLanguages :: [String]
1762 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1764 -- This may contain duplicates
1765 languageOptions :: [DynFlag]
1766 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1768 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1769 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1771 ( "CPP", Opt_Cpp, const Supported ),
1772 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1773 ( "TupleSections", Opt_TupleSections, const Supported ),
1774 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1775 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1776 ( "MagicHash", Opt_MagicHash, const Supported ),
1777 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1778 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1779 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1780 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1781 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1782 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1783 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1784 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1785 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1786 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1787 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1788 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1789 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1790 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1791 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1792 ( "Arrows", Opt_Arrows, const Supported ),
1793 ( "PArr", Opt_PArr, const Supported ),
1794 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1795 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1796 ( "Generics", Opt_Generics, const Supported ),
1798 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1799 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1800 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1801 ( "RecordPuns", Opt_RecordPuns,
1802 deprecatedForLanguage "NamedFieldPuns" ),
1803 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1804 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1805 ( "GADTs", Opt_GADTs, const Supported ),
1806 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1807 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1808 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1810 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1811 -- On by default (which is not strictly H98):
1812 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1813 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1814 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1815 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1816 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1817 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1819 ( "PatternSignatures", Opt_ScopedTypeVariables,
1820 deprecatedForLanguage "ScopedTypeVariables" ),
1822 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1823 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1824 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1825 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1826 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1827 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1828 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1829 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1830 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1831 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1832 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1833 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1834 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1835 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1836 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1837 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1838 ( "PackageImports", Opt_PackageImports, const Supported ),
1839 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1842 impliedFlags :: [(DynFlag, DynFlag)]
1844 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1845 -- be completely rigid for GADTs
1847 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1848 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1849 -- all over the place
1851 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1852 -- Note [Scoped tyvars] in TcBinds
1853 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1856 glasgowExtsFlags :: [DynFlag]
1857 glasgowExtsFlags = [
1858 Opt_PrintExplicitForalls
1859 , Opt_ForeignFunctionInterface
1860 , Opt_UnliftedFFITypes
1862 , Opt_ImplicitParams
1863 , Opt_ScopedTypeVariables
1865 , Opt_TypeSynonymInstances
1866 , Opt_StandaloneDeriving
1867 , Opt_DeriveDataTypeable
1869 , Opt_DeriveFoldable
1870 , Opt_DeriveTraversable
1871 , Opt_FlexibleContexts
1872 , Opt_FlexibleInstances
1873 , Opt_ConstrainedClassMethods
1874 , Opt_MultiParamTypeClasses
1875 , Opt_FunctionalDependencies
1877 , Opt_PolymorphicComponents
1878 , Opt_ExistentialQuantification
1880 , Opt_PostfixOperators
1882 , Opt_LiberalTypeSynonyms
1886 , Opt_ParallelListComp
1887 , Opt_EmptyDataDecls
1888 , Opt_KindSignatures
1889 , Opt_GeneralizedNewtypeDeriving
1890 , Opt_TypeFamilies ]
1892 -- -----------------------------------------------------------------------------
1893 -- Parsing the dynamic flags.
1895 -- | Parse dynamic flags from a list of command line arguments. Returns the
1896 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1897 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1898 -- flags or missing arguments).
1899 parseDynamicFlags :: 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 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1906 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1907 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1908 parseDynamicNoPackageFlags :: Monad m =>
1909 DynFlags -> [Located String]
1910 -> m (DynFlags, [Located String], [Located String])
1911 -- ^ Updated 'DynFlags', left-over arguments, and
1912 -- list of warnings.
1913 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1915 parseDynamicFlags_ :: Monad m =>
1916 DynFlags -> [Located String] -> Bool
1917 -> m (DynFlags, [Located String], [Located String])
1918 parseDynamicFlags_ dflags args pkg_flags = do
1919 -- XXX Legacy support code
1920 -- We used to accept things like
1921 -- optdep-f -optdepdepend
1922 -- optdep-f -optdep depend
1923 -- optdep -f -optdepdepend
1924 -- optdep -f -optdep depend
1925 -- but the spaces trip up proper argument handling. So get rid of them.
1926 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1927 f (x : xs) = x : f xs
1931 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1932 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1933 | otherwise = dynamic_flags
1935 let ((leftover, errs, warns), dflags')
1936 = runCmdLine (processArgs flag_spec args') dflags
1937 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1938 return (dflags', leftover, warns)
1940 type DynP = CmdLineP DynFlags
1942 upd :: (DynFlags -> DynFlags) -> DynP ()
1944 dfs <- getCmdLineState
1945 putCmdLineState $! (f dfs)
1947 --------------------------
1948 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1949 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1950 ; mapM_ setDynFlag deps }
1952 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1953 -- When you set f, set the ones it implies
1954 -- NB: use setDynFlag recursively, in case the implied flags
1955 -- implies further flags
1956 -- When you un-set f, however, we don't un-set the things it implies
1957 -- (except for -fno-glasgow-exts, which is treated specially)
1959 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1961 --------------------------
1962 setDumpFlag :: DynFlag -> OptKind DynP
1963 setDumpFlag dump_flag
1964 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1966 -- Certain dumpy-things are really interested in what's going
1967 -- on during recompilation checking, so in those cases we
1968 -- don't want to turn it off.
1969 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1970 Opt_D_dump_hi_diffs]
1972 forceRecompile :: DynP ()
1973 -- Whenver we -ddump, force recompilation (by switching off the
1974 -- recompilation checker), else you don't see the dump! However,
1975 -- don't switch it off in --make mode, else *everything* gets
1976 -- recompiled which probably isn't what you want
1977 forceRecompile = do { dfs <- getCmdLineState
1978 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1980 force_recomp dfs = isOneShot (ghcMode dfs)
1982 setVerboseCore2Core :: DynP ()
1983 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1985 upd (\s -> s { shouldDumpSimplPhase = const True })
1987 setDumpSimplPhases :: String -> DynP ()
1988 setDumpSimplPhases s = do forceRecompile
1989 upd (\s -> s { shouldDumpSimplPhase = spec })
1991 spec :: SimplifierMode -> Bool
1993 . map (join (&&) . map match . split ':')
1999 join :: (Bool -> Bool -> Bool)
2000 -> [SimplifierMode -> Bool]
2001 -> SimplifierMode -> Bool
2002 join _ [] = const True
2003 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2005 match :: String -> SimplifierMode -> Bool
2006 match "" = const True
2007 match s = case reads s of
2008 [(n,"")] -> phase_num n
2011 phase_num :: Int -> SimplifierMode -> Bool
2012 phase_num n (SimplPhase k _) = n == k
2013 phase_num _ _ = False
2015 phase_name :: String -> SimplifierMode -> Bool
2016 phase_name s SimplGently = s == "gentle"
2017 phase_name s (SimplPhase _ ss) = s `elem` ss
2019 setVerbosity :: Maybe Int -> DynP ()
2020 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2022 addCmdlineHCInclude :: String -> DynP ()
2023 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2025 extraPkgConf_ :: FilePath -> DynP ()
2026 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2028 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2030 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2032 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2034 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2036 setPackageName :: String -> DynFlags -> DynFlags
2038 | Nothing <- unpackPackageId pid
2039 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2041 = \s -> s{ thisPackage = pid }
2043 pid = stringToPackageId p
2045 -- If we're linking a binary, then only targets that produce object
2046 -- code are allowed (requests for other target types are ignored).
2047 setTarget :: HscTarget -> DynP ()
2048 setTarget l = upd set
2051 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2054 -- Changes the target only if we're compiling object code. This is
2055 -- used by -fasm and -fvia-C, which switch from one to the other, but
2056 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2057 -- can be safely used in an OPTIONS_GHC pragma.
2058 setObjTarget :: HscTarget -> DynP ()
2059 setObjTarget l = upd set
2062 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2065 setOptLevel :: Int -> DynFlags -> DynFlags
2066 setOptLevel n dflags
2067 | hscTarget dflags == HscInterpreted && n > 0
2069 -- not in IO any more, oh well:
2070 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2072 = updOptLevel n dflags
2075 -- -Odph is equivalent to
2077 -- -O2 optimise as much as possible
2078 -- -fno-method-sharing sharing specialisation defeats fusion
2080 -- -fdicts-cheap always inline dictionaries
2081 -- -fmax-simplifier-iterations20 this is necessary sometimes
2082 -- -fsimplifier-phases=3 we use an additional simplifier phase
2084 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2085 -- -fno-spec-constr-count SpecConstr as much as possible
2086 -- -finline-enough-args hack to prevent excessive inlining
2088 setDPHOpt :: DynFlags -> DynFlags
2089 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2091 , specConstrThreshold = Nothing
2092 , specConstrCount = Nothing
2094 `dopt_set` Opt_DictsCheap
2095 `dopt_unset` Opt_MethodSharing
2096 `dopt_set` Opt_InlineIfEnoughArgs
2098 data DPHBackend = DPHPar
2101 deriving(Eq, Ord, Enum, Show)
2103 setDPHBackend :: DPHBackend -> DynP ()
2104 setDPHBackend backend
2106 upd $ \dflags -> dflags { dphBackend = backend }
2107 mapM_ exposePackage (dph_packages backend)
2109 dph_packages DPHThis = []
2110 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2111 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2113 dphPackage :: DynFlags -> PackageId
2114 dphPackage dflags = case dphBackend dflags of
2115 DPHPar -> dphParPackageId
2116 DPHSeq -> dphSeqPackageId
2117 DPHThis -> thisPackage dflags
2119 setMainIs :: String -> DynP ()
2121 | not (null main_fn) && isLower (head main_fn)
2122 -- The arg looked like "Foo.Bar.baz"
2123 = upd $ \d -> d{ mainFunIs = Just main_fn,
2124 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2126 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2127 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2129 | otherwise -- The arg looked like "baz"
2130 = upd $ \d -> d{ mainFunIs = Just arg }
2132 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2134 -----------------------------------------------------------------------------
2135 -- Paths & Libraries
2137 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2139 -- -i on its own deletes the import paths
2140 addImportPath "" = upd (\s -> s{importPaths = []})
2141 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2145 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2148 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2150 addFrameworkPath p =
2151 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2153 #ifndef mingw32_TARGET_OS
2154 split_marker :: Char
2155 split_marker = ':' -- not configurable (ToDo)
2158 splitPathList :: String -> [String]
2159 splitPathList s = filter notNull (splitUp s)
2160 -- empty paths are ignored: there might be a trailing
2161 -- ':' in the initial list, for example. Empty paths can
2162 -- cause confusion when they are translated into -I options
2163 -- for passing to gcc.
2165 #ifndef mingw32_TARGET_OS
2166 splitUp xs = split split_marker xs
2168 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2170 -- That is, if "foo:bar:baz" is used, this interpreted as
2171 -- consisting of three entries, 'foo', 'bar', 'baz'.
2172 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2173 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2175 -- Notice that no attempt is made to fully replace the 'standard'
2176 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2177 -- that this will cause too much breakage for users & ':' will
2178 -- work fine even with DOS paths, if you're not insisting on being silly.
2181 splitUp (x:':':div:xs) | div `elem` dir_markers
2182 = ((x:':':div:p): splitUp rs)
2184 (p,rs) = findNextPath xs
2185 -- we used to check for existence of the path here, but that
2186 -- required the IO monad to be threaded through the command-line
2187 -- parser which is quite inconvenient. The
2188 splitUp xs = cons p (splitUp rs)
2190 (p,rs) = findNextPath xs
2195 -- will be called either when we've consumed nought or the
2196 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2197 -- finding the next split marker.
2199 case break (`elem` split_markers) xs of
2200 (p, _:ds) -> (p, ds)
2203 split_markers :: [Char]
2204 split_markers = [':', ';']
2206 dir_markers :: [Char]
2207 dir_markers = ['/', '\\']
2210 -- -----------------------------------------------------------------------------
2211 -- tmpDir, where we store temporary files.
2213 setTmpDir :: FilePath -> DynFlags -> DynFlags
2214 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2215 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2216 -- seem necessary now --SDM 7/2/2008
2218 -----------------------------------------------------------------------------
2221 setOptHpcDir :: String -> DynP ()
2222 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2224 -----------------------------------------------------------------------------
2225 -- Via-C compilation stuff
2227 -- There are some options that we need to pass to gcc when compiling
2228 -- Haskell code via C, but are only supported by recent versions of
2229 -- gcc. The configure script decides which of these options we need,
2230 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2231 -- read before each via-C compilation. The advantage of having these
2232 -- in a separate file is that the file can be created at install-time
2233 -- depending on the available gcc version, and even re-generated later
2234 -- if gcc is upgraded.
2236 -- The options below are not dependent on the version of gcc, only the
2239 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2240 [String]) -- for registerised HC compilations
2241 machdepCCOpts _dflags
2242 #if alpha_TARGET_ARCH
2244 #ifdef HAVE_THREADED_RTS_SUPPORT
2248 -- For now, to suppress the gcc warning "call-clobbered
2249 -- register used for global register variable", we simply
2250 -- disable all warnings altogether using the -w flag. Oh well.
2252 #elif hppa_TARGET_ARCH
2253 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2254 -- (very nice, but too bad the HP /usr/include files don't agree.)
2255 = ( ["-D_HPUX_SOURCE"], [] )
2257 #elif m68k_TARGET_ARCH
2258 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2259 -- popping of args to routines to be explicit; if we let things
2260 -- be deferred 'til after an STGJUMP, imminent death is certain!
2262 -- -fomit-frame-pointer : *don't*
2263 -- It's better to have a6 completely tied up being a frame pointer
2264 -- rather than let GCC pick random things to do with it.
2265 -- (If we want to steal a6, then we would try to do things
2266 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2267 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2269 #elif i386_TARGET_ARCH
2270 -- -fno-defer-pop : basically the same game as for m68k
2272 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2273 -- the fp (%ebp) for our register maps.
2274 = let n_regs = stolen_x86_regs _dflags
2277 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2280 "-fomit-frame-pointer",
2281 -- we want -fno-builtin, because when gcc inlines
2282 -- built-in functions like memcpy() it tends to
2283 -- run out of registers, requiring -monly-n-regs
2285 "-DSTOLEN_X86_REGS="++show n_regs ]
2288 #elif ia64_TARGET_ARCH
2289 = ( [], ["-fomit-frame-pointer", "-G0"] )
2291 #elif x86_64_TARGET_ARCH
2293 #if darwin_TARGET_OS
2298 ["-fomit-frame-pointer",
2299 "-fno-asynchronous-unwind-tables",
2300 -- the unwind tables are unnecessary for HC code,
2301 -- and get in the way of -split-objs. Another option
2302 -- would be to throw them away in the mangler, but this
2305 -- calling builtins like strlen() using the FFI can
2306 -- cause gcc to run out of regs, so use the external
2310 #elif sparc_TARGET_ARCH
2312 -- For now, to suppress the gcc warning "call-clobbered
2313 -- register used for global register variable", we simply
2314 -- disable all warnings altogether using the -w flag. Oh well.
2316 #elif powerpc_apple_darwin_TARGET
2318 -- Disable Apple's precompiling preprocessor. It's a great thing
2319 -- for "normal" programs, but it doesn't support register variable
2321 = ( [], ["-no-cpp-precomp"] )
2326 picCCOpts :: DynFlags -> [String]
2328 #if darwin_TARGET_OS
2329 -- Apple prefers to do things the other way round.
2330 -- PIC is on by default.
2331 -- -mdynamic-no-pic:
2332 -- Turn off PIC code generation.
2334 -- Don't generate "common" symbols - these are unwanted
2335 -- in dynamic libraries.
2338 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2340 = ["-mdynamic-no-pic"]
2341 #elif mingw32_TARGET_OS
2342 -- no -fPIC for Windows
2344 = ["-U __PIC__","-D__PIC__"]
2348 | opt_PIC || not opt_Static
2349 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2354 -- -----------------------------------------------------------------------------
2358 can_split = cSplitObjs == "YES"
2360 -- -----------------------------------------------------------------------------
2363 data Printable = String String
2364 | FromDynFlags (DynFlags -> String)
2366 compilerInfo :: [(String, Printable)]
2367 compilerInfo = [("Project name", String cProjectName),
2368 ("Project version", String cProjectVersion),
2369 ("Booter version", String cBooterVersion),
2370 ("Stage", String cStage),
2371 ("Have interpreter", String cGhcWithInterpreter),
2372 ("Object splitting", String cSplitObjs),
2373 ("Have native code generator", String cGhcWithNativeCodeGen),
2374 ("Support SMP", String cGhcWithSMP),
2375 ("Unregisterised", String cGhcUnregisterised),
2376 ("Tables next to code", String cGhcEnableTablesNextToCode),
2377 ("Win32 DLLs", String cEnableWin32DLLs),
2378 ("RTS ways", String cGhcRTSWays),
2379 ("Leading underscore", String cLeadingUnderscore),
2380 ("Debug on", String (show debugIsOn)),
2381 ("LibDir", FromDynFlags topDir)