5 -- (c) The University of Glasgow 2005
8 -- Most flags are dynamic flags, which means they can change from
9 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
10 -- multi-session GHC each session can be using different dynamic
11 -- flags. Dynamic flags can also be set at the prompt in GHCi.
13 -- * Dynamic flags and associated configuration types
16 HscTarget(..), isObjectTarget, defaultObjectTarget,
17 GhcMode(..), isOneShot,
18 GhcLink(..), isNoLink,
25 -- ** Manipulating DynFlags
26 defaultDynFlags, -- DynFlags
27 initDynFlags, -- DynFlags -> IO DynFlags
29 dopt, -- DynFlag -> DynFlags -> Bool
30 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
31 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
38 -- ** Parsing DynFlags
40 parseDynamicNoPackageFlags,
43 supportedLanguages, languageOptions,
45 -- ** DynFlag C compiler options
46 machdepCCOpts, picCCOpts,
48 -- * Configuration of the core-to-core passes
55 -- * Configuration of the stg-to-stg passes
59 -- * Compiler configuration suitable for display to the user
64 #include "HsVersions.h"
66 #ifndef OMIT_NATIVE_CODEGEN
71 import PrelNames ( mAIN )
72 #if defined(i386_TARGET_ARCH) || (!defined(mingw32_TARGET_OS) && !defined(darwin_TARGET_OS))
73 import StaticFlags ( opt_Static )
75 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
77 import {-# SOURCE #-} Packages (PackageState)
78 import DriverPhases ( Phase(..), phaseInputExt )
81 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
83 import UniqFM ( UniqFM )
85 import Maybes ( orElse )
90 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
93 import Control.Monad ( when )
97 import System.FilePath
98 import System.IO ( stderr, hPutChar )
100 -- -----------------------------------------------------------------------------
103 -- | Enumerates the simple on-or-off dynamic flags
109 | Opt_D_dump_cmmz_pretty
113 | Opt_D_dump_asm_native
114 | Opt_D_dump_asm_liveness
115 | Opt_D_dump_asm_coalesce
116 | Opt_D_dump_asm_regalloc
117 | Opt_D_dump_asm_regalloc_stages
118 | Opt_D_dump_asm_conflicts
119 | Opt_D_dump_asm_stats
120 | Opt_D_dump_asm_expanded
126 | Opt_D_dump_inlinings
127 | Opt_D_dump_rule_firings
128 | Opt_D_dump_occur_anal
132 | Opt_D_dump_simpl_iterations
133 | Opt_D_dump_simpl_phases
142 | Opt_D_dump_worker_wrapper
143 | Opt_D_dump_rn_trace
144 | Opt_D_dump_rn_stats
146 | Opt_D_dump_simpl_stats
147 | Opt_D_dump_tc_trace
148 | Opt_D_dump_if_trace
155 | Opt_D_verbose_core2core
156 | Opt_D_verbose_stg2stg
158 | Opt_D_dump_hi_diffs
159 | Opt_D_dump_minimal_imports
160 | Opt_D_dump_mod_cycles
161 | Opt_D_dump_view_pattern_commoning
162 | Opt_D_faststring_stats
163 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
164 | Opt_D_no_debug_output
170 | Opt_WarnIsError -- -Werror; makes warnings fatal
171 | Opt_WarnDuplicateExports
173 | Opt_WarnImplicitPrelude
174 | Opt_WarnIncompletePatterns
175 | Opt_WarnIncompletePatternsRecUpd
176 | Opt_WarnMissingFields
177 | Opt_WarnMissingMethods
178 | Opt_WarnMissingSigs
179 | Opt_WarnNameShadowing
180 | Opt_WarnOverlappingPatterns
181 | Opt_WarnSimplePatterns
182 | Opt_WarnTypeDefaults
183 | Opt_WarnMonomorphism
184 | Opt_WarnUnusedBinds
185 | Opt_WarnUnusedImports
186 | Opt_WarnUnusedMatches
187 | Opt_WarnWarningsDeprecations
188 | Opt_WarnDeprecatedFlags
189 | Opt_WarnDodgyExports
190 | Opt_WarnDodgyImports
193 | Opt_WarnUnrecognisedPragmas
194 | Opt_WarnDodgyForeignImports
195 | Opt_WarnLazyUnliftedBindings
196 | Opt_WarnUnusedDoBind
197 | Opt_WarnWrongDoBind
201 | Opt_OverlappingInstances
202 | Opt_UndecidableInstances
203 | Opt_IncoherentInstances
204 | Opt_MonomorphismRestriction
207 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
208 | Opt_ForeignFunctionInterface
209 | Opt_UnliftedFFITypes
210 | Opt_GHCForeignImportPrim
211 | Opt_PArr -- Syntactic support for parallel arrays
212 | Opt_Arrows -- Arrow-notation syntax
213 | Opt_TemplateHaskell
216 | Opt_Generics -- "Derivable type classes"
217 | Opt_ImplicitPrelude
218 | Opt_ScopedTypeVariables
222 | Opt_OverloadedStrings
223 | Opt_DisambiguateRecordFields
224 | Opt_RecordWildCards
231 | Opt_StandaloneDeriving
232 | Opt_DeriveDataTypeable
234 | Opt_DeriveTraversable
237 | Opt_TypeSynonymInstances
238 | Opt_FlexibleContexts
239 | Opt_FlexibleInstances
240 | Opt_ConstrainedClassMethods
241 | Opt_MultiParamTypeClasses
242 | Opt_FunctionalDependencies
244 | Opt_PolymorphicComponents
245 | Opt_ExistentialQuantification
249 | Opt_ParallelListComp
250 | Opt_TransformListComp
251 | Opt_GeneralizedNewtypeDeriving
253 | Opt_PostfixOperators
256 | Opt_LiberalTypeSynonyms
259 | Opt_ImpredicativeTypes
262 | Opt_NewQualifiedOperators
264 | Opt_PrintExplicitForalls
269 | Opt_StaticArgumentTransformation
273 | Opt_IgnoreInterfacePragmas
274 | Opt_OmitInterfacePragmas
275 | Opt_DoLambdaEtaExpansion
279 | Opt_UnboxStrictFields
282 | Opt_InlineIfEnoughArgs
283 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
285 | Opt_RegsGraph -- do graph coloring register allocation
286 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
289 | Opt_AutoSccsOnAllToplevs
290 | Opt_AutoSccsOnExportedToplevs
291 | Opt_AutoSccsOnIndividualCafs
299 | Opt_ExcessPrecision
300 | Opt_EagerBlackHoling
301 | Opt_ReadUserPackageConf
305 | Opt_HideAllPackages
306 | Opt_PrintBindResult
310 | Opt_BreakOnException
312 | Opt_PrintEvldWithShow
313 | Opt_PrintBindContents
316 | Opt_EmitExternalCore
322 | Opt_ConvertToZipCfgAndBack
323 | Opt_AutoLinkPackages
324 | Opt_ImplicitImportQualified
333 | Opt_KeepRawTokenStream
337 -- | Contains not only a collection of 'DynFlag's but also a plethora of
338 -- information relating to the compilation of a single file or GHC session
339 data DynFlags = DynFlags {
342 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
343 stgToDo :: Maybe [StgToDo], -- similarly
344 hscTarget :: HscTarget,
345 hscOutName :: String, -- ^ Name of the output file
346 extCoreName :: String, -- ^ Name of the .hcr output file
347 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
348 optLevel :: Int, -- ^ Optimisation level
349 simplPhases :: Int, -- ^ Number of simplifier phases
350 maxSimplIterations :: Int, -- ^ Max simplifier iterations
351 shouldDumpSimplPhase :: SimplifierMode -> Bool,
352 ruleCheck :: Maybe String,
354 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
355 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
356 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
358 #ifndef OMIT_NATIVE_CODEGEN
359 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
361 stolen_x86_regs :: Int,
362 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
363 importPaths :: [FilePath],
365 mainFunIs :: Maybe String,
366 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
368 dphBackend :: DPHBackend,
370 thisPackage :: PackageId, -- ^ name of package currently being compiled
373 wayNames :: [WayName], -- ^ Way flags from the command line
374 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
375 rtsBuildTag :: String, -- ^ The RTS \"way\"
377 -- For object splitting
378 splitInfo :: Maybe (String,Int),
381 objectDir :: Maybe String,
382 hiDir :: Maybe String,
383 stubDir :: Maybe String,
389 outputFile :: Maybe String,
390 outputHi :: Maybe String,
391 dynLibLoader :: DynLibLoader,
393 -- | This is set by 'DriverPipeline.runPipeline' based on where
394 -- its output is going.
395 dumpPrefix :: Maybe FilePath,
397 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
398 -- Set by @-ddump-file-prefix@
399 dumpPrefixForce :: Maybe FilePath,
401 includePaths :: [String],
402 libraryPaths :: [String],
403 frameworkPaths :: [String], -- used on darwin only
404 cmdlineFrameworks :: [String], -- ditto
405 tmpDir :: String, -- no trailing '/'
407 ghcUsagePath :: FilePath, -- Filled in by SysTools
408 ghciUsagePath :: FilePath, -- ditto
410 hpcDir :: String, -- ^ Path to store the .mix files
412 -- options for particular phases
420 opt_windres :: [String],
422 -- commands for particular phases
424 pgm_P :: (String,[Option]),
426 pgm_c :: (String,[Option]),
427 pgm_m :: (String,[Option]),
428 pgm_s :: (String,[Option]),
429 pgm_a :: (String,[Option]),
430 pgm_l :: (String,[Option]),
431 pgm_dll :: (String,[Option]),
433 pgm_sysman :: String,
434 pgm_windres :: String,
437 depMakefile :: FilePath,
438 depIncludePkgDeps :: Bool,
439 depExcludeMods :: [ModuleName],
440 depSuffixes :: [String],
443 extraPkgConfs :: [FilePath],
444 topDir :: FilePath, -- filled in by SysTools
445 systemPackageConfig :: FilePath, -- ditto
446 -- ^ The @-package-conf@ flags given on the command line, in the order
449 packageFlags :: [PackageFlag],
450 -- ^ The @-package@ and @-hide-package@ flags from the command-line
453 -- NB. do not modify this field, it is calculated by
454 -- Packages.initPackages and Packages.updatePackages.
455 pkgDatabase :: Maybe (UniqFM PackageConfig),
456 pkgState :: PackageState,
459 -- These have to be IORefs, because the defaultCleanupHandler needs to
460 -- know what to clean when an exception happens
461 filesToClean :: IORef [FilePath],
462 dirsToClean :: IORef (FiniteMap FilePath FilePath),
467 -- | Message output action: use "ErrUtils" instead of this if you can
468 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
470 haddockOptions :: Maybe String
473 -- | The target code type of the compilation (if any).
475 -- Whenever you change the target, also make sure to set 'ghcLink' to
476 -- something sensible.
478 -- 'HscNothing' can be used to avoid generating any output, however, note
481 -- * This will not run the desugaring step, thus no warnings generated in
482 -- this step will be output. In particular, this includes warnings related
483 -- to pattern matching. You can run the desugarer manually using
484 -- 'GHC.desugarModule'.
486 -- * If a program uses Template Haskell the typechecker may try to run code
487 -- from an imported module. This will fail if no code has been generated
488 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
489 -- whether this might be the case and choose to either switch to a
490 -- different target or avoid typechecking such modules. (The latter may
491 -- preferable for security reasons.)
494 = HscC -- ^ Generate C code.
495 | HscAsm -- ^ Generate assembly using the native code generator.
496 | HscJava -- ^ Generate Java bytecode.
497 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
498 | HscNothing -- ^ Don't generate any code. See notes above.
501 -- | Will this target result in an object file on the disk?
502 isObjectTarget :: HscTarget -> Bool
503 isObjectTarget HscC = True
504 isObjectTarget HscAsm = True
505 isObjectTarget _ = False
507 -- | The 'GhcMode' tells us whether we're doing multi-module
508 -- compilation (controlled via the "GHC" API) or one-shot
509 -- (single-module) compilation. This makes a difference primarily to
510 -- the "Finder": in one-shot mode we look for interface files for
511 -- imported modules, but in multi-module mode we look for source files
512 -- in order to check whether they need to be recompiled.
514 = CompManager -- ^ @\-\-make@, GHCi, etc.
515 | OneShot -- ^ @ghc -c Foo.hs@
516 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
519 instance Outputable GhcMode where
520 ppr CompManager = ptext (sLit "CompManager")
521 ppr OneShot = ptext (sLit "OneShot")
522 ppr MkDepend = ptext (sLit "MkDepend")
524 isOneShot :: GhcMode -> Bool
525 isOneShot OneShot = True
526 isOneShot _other = False
528 -- | What to do in the link step, if there is one.
530 = NoLink -- ^ Don't link at all
531 | LinkBinary -- ^ Link object code into a binary
532 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
533 -- bytecode and object code).
534 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
537 isNoLink :: GhcLink -> Bool
538 isNoLink NoLink = True
541 -- Is it worth evaluating this Bool and caching it in the DynFlags value
542 -- during initDynFlags?
543 doingTickyProfiling :: DynFlags -> Bool
544 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
547 = ExposePackage String
549 | IgnorePackage String
552 defaultHscTarget :: HscTarget
553 defaultHscTarget = defaultObjectTarget
555 -- | The 'HscTarget' value corresponding to the default way to create
556 -- object files on the current platform.
557 defaultObjectTarget :: HscTarget
559 | cGhcWithNativeCodeGen == "YES" = HscAsm
564 | Wrapped (Maybe String)
568 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
569 initDynFlags :: DynFlags -> IO DynFlags
570 initDynFlags dflags = do
571 -- someday these will be dynamic flags
572 ways <- readIORef v_Ways
573 build_tag <- readIORef v_Build_tag
574 rts_build_tag <- readIORef v_RTS_Build_tag
575 refFilesToClean <- newIORef []
576 refDirsToClean <- newIORef emptyFM
579 buildTag = build_tag,
580 rtsBuildTag = rts_build_tag,
581 filesToClean = refFilesToClean,
582 dirsToClean = refDirsToClean
585 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
586 -- and must be fully initialized by 'GHC.newSession' first.
587 defaultDynFlags :: DynFlags
590 ghcMode = CompManager,
591 ghcLink = LinkBinary,
594 hscTarget = defaultHscTarget,
600 maxSimplIterations = 4,
601 shouldDumpSimplPhase = const False,
603 specConstrThreshold = Just 200,
604 specConstrCount = Just 3,
605 liberateCaseThreshold = Just 200,
606 #ifndef OMIT_NATIVE_CODEGEN
607 targetPlatform = defaultTargetPlatform,
610 cmdlineHcIncludes = [],
614 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
618 thisPackage = mainPackageId,
624 objectSuf = phaseInputExt StopLn,
625 hcSuf = phaseInputExt HCc,
628 outputFile = Nothing,
630 dynLibLoader = SystemDependent,
631 dumpPrefix = Nothing,
632 dumpPrefixForce = Nothing,
636 cmdlineFrameworks = [],
637 tmpDir = cDEFAULT_TMPDIR,
643 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
654 pkgDatabase = Nothing,
655 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
656 wayNames = panic "defaultDynFlags: No wayNames",
657 buildTag = panic "defaultDynFlags: No buildTag",
658 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
660 -- initSysTools fills all these in
661 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
662 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
663 topDir = panic "defaultDynFlags: No topDir",
664 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
665 pgm_L = panic "defaultDynFlags: No pgm_L",
666 pgm_P = panic "defaultDynFlags: No pgm_P",
667 pgm_F = panic "defaultDynFlags: No pgm_F",
668 pgm_c = panic "defaultDynFlags: No pgm_c",
669 pgm_m = panic "defaultDynFlags: No pgm_m",
670 pgm_s = panic "defaultDynFlags: No pgm_s",
671 pgm_a = panic "defaultDynFlags: No pgm_a",
672 pgm_l = panic "defaultDynFlags: No pgm_l",
673 pgm_dll = panic "defaultDynFlags: No pgm_dll",
674 pgm_T = panic "defaultDynFlags: No pgm_T",
675 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
676 pgm_windres = panic "defaultDynFlags: No pgm_windres",
677 -- end of initSysTools values
679 depMakefile = "Makefile",
680 depIncludePkgDeps = False,
683 -- end of ghc -M values
684 filesToClean = panic "defaultDynFlags: No filesToClean",
685 dirsToClean = panic "defaultDynFlags: No dirsToClean",
686 haddockOptions = Nothing,
688 Opt_AutoLinkPackages,
689 Opt_ReadUserPackageConf,
691 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
692 -- behaviour the default, to see if anyone notices
696 Opt_MonomorphismRestriction,
707 Opt_PrintBindContents
709 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
710 -- The default -O0 options
713 log_action = \severity srcSpan style msg ->
715 SevInfo -> printErrs (msg style)
716 SevFatal -> printErrs (msg style)
719 printErrs ((mkLocMessage srcSpan msg) style)
720 -- careful (#2302): printErrs prints in UTF-8, whereas
721 -- converting to string first and using hPutStr would
722 -- just emit the low 8 bits of each unicode char.
729 0 | print errors & warnings only
730 1 | minimal verbosity: print "compiling M ... done." for each module.
731 2 | equivalent to -dshow-passes
732 3 | equivalent to existing "ghc -v"
733 4 | "ghc -v -ddump-most"
734 5 | "ghc -v -ddump-all"
737 -- | Test whether a 'DynFlag' is set
738 dopt :: DynFlag -> DynFlags -> Bool
739 dopt f dflags = f `elem` (flags dflags)
742 dopt_set :: DynFlags -> DynFlag -> DynFlags
743 dopt_set dfs f = dfs{ flags = f : flags dfs }
745 -- | Unset a 'DynFlag'
746 dopt_unset :: DynFlags -> DynFlag -> DynFlags
747 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
749 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
750 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
751 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
752 -> [a] -- ^ Correctly ordered extracted options
753 getOpts dflags opts = reverse (opts dflags)
754 -- We add to the options from the front, so we need to reverse the list
756 -- | Gets the verbosity flag for the current verbosity level. This is fed to
757 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
758 getVerbFlag :: DynFlags -> String
760 | verbosity dflags >= 3 = "-v"
763 setObjectDir, setHiDir, setStubDir, setOutputDir,
764 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
765 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
766 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
767 addCmdlineFramework, addHaddockOpts
768 :: String -> DynFlags -> DynFlags
769 setOutputFile, setOutputHi, setDumpPrefixForce
770 :: Maybe String -> DynFlags -> DynFlags
772 setObjectDir f d = d{ objectDir = Just f}
773 setHiDir f d = d{ hiDir = Just f}
774 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
775 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
776 -- \#included from the .hc file when compiling with -fvia-C.
777 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
779 setObjectSuf f d = d{ objectSuf = f}
780 setHiSuf f d = d{ hiSuf = f}
781 setHcSuf f d = d{ hcSuf = f}
783 setOutputFile f d = d{ outputFile = f}
784 setOutputHi f d = d{ outputHi = f}
786 parseDynLibLoaderMode f d =
788 ("deploy", "") -> d{ dynLibLoader = Deployable }
789 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
790 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
791 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
792 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
793 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
795 setDumpPrefixForce f d = d { dumpPrefixForce = f}
797 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
798 -- Config.hs should really use Option.
799 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
801 setPgmL f d = d{ pgm_L = f}
802 setPgmF f d = d{ pgm_F = f}
803 setPgmc f d = d{ pgm_c = (f,[])}
804 setPgmm f d = d{ pgm_m = (f,[])}
805 setPgms f d = d{ pgm_s = (f,[])}
806 setPgma f d = d{ pgm_a = (f,[])}
807 setPgml f d = d{ pgm_l = (f,[])}
808 setPgmdll f d = d{ pgm_dll = (f,[])}
809 setPgmwindres f d = d{ pgm_windres = f}
811 addOptL f d = d{ opt_L = f : opt_L d}
812 addOptP f d = d{ opt_P = f : opt_P d}
813 addOptF f d = d{ opt_F = f : opt_F d}
814 addOptc f d = d{ opt_c = f : opt_c d}
815 addOptm f d = d{ opt_m = f : opt_m d}
816 addOpta f d = d{ opt_a = f : opt_a d}
817 addOptl f d = d{ opt_l = f : opt_l d}
818 addOptwindres f d = d{ opt_windres = f : opt_windres d}
820 setDepMakefile :: FilePath -> DynFlags -> DynFlags
821 setDepMakefile f d = d { depMakefile = deOptDep f }
823 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
824 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
826 addDepExcludeMod :: String -> DynFlags -> DynFlags
828 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
830 addDepSuffix :: FilePath -> DynFlags -> DynFlags
831 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
834 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
835 -- we need to strip the "-optdep" off of the arg
836 deOptDep :: String -> String
837 deOptDep x = case stripPrefix "-optdep" x of
841 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
843 addHaddockOpts f d = d{ haddockOptions = Just f}
845 -- -----------------------------------------------------------------------------
846 -- Command-line options
848 -- | When invoking external tools as part of the compilation pipeline, we
849 -- pass these a sequence of options on the command-line. Rather than
850 -- just using a list of Strings, we use a type that allows us to distinguish
851 -- between filepaths and 'other stuff'. The reason for this is that
852 -- this type gives us a handle on transforming filenames, and filenames only,
853 -- to whatever format they're expected to be on a particular platform.
855 = FileOption -- an entry that _contains_ filename(s) / filepaths.
856 String -- a non-filepath prefix that shouldn't be
857 -- transformed (e.g., "/out=")
858 String -- the filepath/filename portion
861 showOpt :: Option -> String
862 showOpt (FileOption pre f) = pre ++ f
863 showOpt (Option s) = s
865 -----------------------------------------------------------------------------
866 -- Setting the optimisation level
868 updOptLevel :: Int -> DynFlags -> DynFlags
869 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
871 = dfs2{ optLevel = final_n }
873 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
874 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
875 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
877 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
878 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
880 optLevelFlags :: [([Int], DynFlag)]
882 = [ ([0], Opt_IgnoreInterfacePragmas)
883 , ([0], Opt_OmitInterfacePragmas)
885 , ([1,2], Opt_IgnoreAsserts)
886 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
888 , ([1,2], Opt_DoEtaReduction)
889 , ([1,2], Opt_CaseMerge)
890 , ([1,2], Opt_Strictness)
892 , ([1,2], Opt_FullLaziness)
894 , ([2], Opt_LiberateCase)
895 , ([2], Opt_SpecConstr)
897 -- , ([2], Opt_StaticArgumentTransformation)
898 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
899 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
900 -- several improvements to the heuristics, and I'm concerned that without
901 -- those changes SAT will interfere with some attempts to write "high
902 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
903 -- this year. In particular, the version in HEAD lacks the tail call
904 -- criterion, so many things that look like reasonable loops will be
905 -- turned into functions with extra (unneccesary) thunk creation.
907 , ([0,1,2], Opt_DoLambdaEtaExpansion)
908 -- This one is important for a tiresome reason:
909 -- we want to make sure that the bindings for data
910 -- constructors are eta-expanded. This is probably
911 -- a good thing anyway, but it seems fragile.
914 -- -----------------------------------------------------------------------------
915 -- Standard sets of warning options
917 standardWarnings :: [DynFlag]
919 = [ Opt_WarnWarningsDeprecations,
920 Opt_WarnDeprecatedFlags,
921 Opt_WarnUnrecognisedPragmas,
922 Opt_WarnOverlappingPatterns,
923 Opt_WarnMissingFields,
924 Opt_WarnMissingMethods,
925 Opt_WarnDuplicateExports,
926 Opt_WarnLazyUnliftedBindings,
927 Opt_WarnDodgyForeignImports,
931 minusWOpts :: [DynFlag]
933 = standardWarnings ++
934 [ Opt_WarnUnusedBinds,
935 Opt_WarnUnusedMatches,
936 Opt_WarnUnusedImports,
937 Opt_WarnIncompletePatterns,
938 Opt_WarnDodgyExports,
942 minusWallOpts :: [DynFlag]
945 [ Opt_WarnTypeDefaults,
946 Opt_WarnNameShadowing,
953 -- minuswRemovesOpts should be every warning option
954 minuswRemovesOpts :: [DynFlag]
957 [Opt_WarnImplicitPrelude,
958 Opt_WarnIncompletePatternsRecUpd,
959 Opt_WarnSimplePatterns,
960 Opt_WarnMonomorphism,
961 Opt_WarnUnrecognisedPragmas,
965 -- -----------------------------------------------------------------------------
966 -- CoreToDo: abstraction of core-to-core passes to run.
968 data CoreToDo -- These are diff core-to-core passes,
969 -- which may be invoked in any order,
970 -- as many times as you like.
972 = CoreDoSimplify -- The core-to-core simplifier.
975 -- Each run of the simplifier can take a different
976 -- set of simplifier-specific flags.
978 | CoreDoFloatOutwards FloatOutSwitches
983 | CoreDoWorkerWrapper
986 | CoreDoOldStrictness
989 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
990 -- matching this string
991 | CoreDoVectorisation PackageId
992 | CoreDoNothing -- Useful when building up
993 | CoreDoPasses [CoreToDo] -- lists of these things
996 data SimplifierMode -- See comments in SimplMonad
998 | SimplPhase Int [String]
1000 instance Outputable SimplifierMode where
1001 ppr SimplGently = ptext (sLit "gentle")
1002 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1005 data SimplifierSwitch
1006 = MaxSimplifierIterations Int
1010 data FloatOutSwitches = FloatOutSwitches {
1011 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1012 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1013 -- even if they do not escape a lambda
1016 instance Outputable FloatOutSwitches where
1017 ppr = pprFloatOutSwitches
1019 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1020 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1021 <+> pp_not (floatOutConstants sw) <+> text "constants"
1024 pp_not False = text "not"
1026 -- | Switches that specify the minimum amount of floating out
1027 -- gentleFloatOutSwitches :: FloatOutSwitches
1028 -- gentleFloatOutSwitches = FloatOutSwitches False False
1030 -- | Switches that do not specify floating out of lambdas, just of constants
1031 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1032 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1035 -- The core-to-core pass ordering is derived from the DynFlags:
1036 runWhen :: Bool -> CoreToDo -> CoreToDo
1037 runWhen True do_this = do_this
1038 runWhen False _ = CoreDoNothing
1040 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1041 runMaybe (Just x) f = f x
1042 runMaybe Nothing _ = CoreDoNothing
1044 getCoreToDo :: DynFlags -> [CoreToDo]
1046 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1047 | otherwise = core_todo
1049 opt_level = optLevel dflags
1050 phases = simplPhases dflags
1051 max_iter = maxSimplIterations dflags
1052 strictness = dopt Opt_Strictness dflags
1053 full_laziness = dopt Opt_FullLaziness dflags
1054 cse = dopt Opt_CSE dflags
1055 spec_constr = dopt Opt_SpecConstr dflags
1056 liberate_case = dopt Opt_LiberateCase dflags
1057 rule_check = ruleCheck dflags
1058 static_args = dopt Opt_StaticArgumentTransformation dflags
1060 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1062 simpl_phase phase names iter
1064 [ CoreDoSimplify (SimplPhase phase names) [
1065 MaxSimplifierIterations iter
1067 maybe_rule_check phase
1071 = runWhen (dopt Opt_Vectorise dflags)
1072 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1075 -- By default, we have 2 phases before phase 0.
1077 -- Want to run with inline phase 2 after the specialiser to give
1078 -- maximum chance for fusion to work before we inline build/augment
1079 -- in phase 1. This made a difference in 'ansi' where an
1080 -- overloaded function wasn't inlined till too late.
1082 -- Need phase 1 so that build/augment get
1083 -- inlined. I found that spectral/hartel/genfft lost some useful
1084 -- strictness in the function sumcode' if augment is not inlined
1085 -- before strictness analysis runs
1086 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1087 | phase <- [phases, phases-1 .. 1] ]
1090 -- initial simplify: mk specialiser happy: minimum effort please
1091 simpl_gently = CoreDoSimplify SimplGently [
1092 -- Simplify "gently"
1093 -- Don't inline anything till full laziness has bitten
1094 -- In particular, inlining wrappers inhibits floating
1095 -- e.g. ...(case f x of ...)...
1096 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1097 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1098 -- and now the redex (f x) isn't floatable any more
1099 -- Similarly, don't apply any rules until after full
1100 -- laziness. Notably, list fusion can prevent floating.
1102 NoCaseOfCase, -- Don't do case-of-case transformations.
1103 -- This makes full laziness work better
1104 MaxSimplifierIterations max_iter
1108 if opt_level == 0 then
1110 simpl_phase 0 ["final"] max_iter]
1111 else {- opt_level >= 1 -} [
1113 -- We want to do the static argument transform before full laziness as it
1114 -- may expose extra opportunities to float things outwards. However, to fix
1115 -- up the output of the transformation we need at do at least one simplify
1116 -- after this before anything else
1117 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1119 -- We run vectorisation here for now, but we might also try to run
1123 -- initial simplify: mk specialiser happy: minimum effort please
1126 -- Specialisation is best done before full laziness
1127 -- so that overloaded functions have all their dictionary lambdas manifest
1130 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1131 -- Was: gentleFloatOutSwitches
1132 -- I have no idea why, but not floating constants to top level is
1133 -- very bad in some cases.
1134 -- Notably: p_ident in spectral/rewrite
1135 -- Changing from "gentle" to "constantsOnly" improved
1136 -- rewrite's allocation by 19%, and made 0.0% difference
1137 -- to any other nofib benchmark
1143 -- Phase 0: allow all Ids to be inlined now
1144 -- This gets foldr inlined before strictness analysis
1146 -- At least 3 iterations because otherwise we land up with
1147 -- huge dead expressions because of an infelicity in the
1149 -- let k = BIG in foldr k z xs
1150 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1151 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1153 simpl_phase 0 ["main"] (max max_iter 3),
1156 #ifdef OLD_STRICTNESS
1157 CoreDoOldStrictness,
1159 runWhen strictness (CoreDoPasses [
1161 CoreDoWorkerWrapper,
1163 simpl_phase 0 ["post-worker-wrapper"] max_iter
1166 runWhen full_laziness
1167 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1168 -- nofib/spectral/hartel/wang doubles in speed if you
1169 -- do full laziness late in the day. It only happens
1170 -- after fusion and other stuff, so the early pass doesn't
1171 -- catch it. For the record, the redex is
1172 -- f_el22 (f_el21 r_midblock)
1175 runWhen cse CoreCSE,
1176 -- We want CSE to follow the final full-laziness pass, because it may
1177 -- succeed in commoning up things floated out by full laziness.
1178 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1184 -- Case-liberation for -O2. This should be after
1185 -- strictness analysis and the simplification which follows it.
1186 runWhen liberate_case (CoreDoPasses [
1188 simpl_phase 0 ["post-liberate-case"] max_iter
1189 ]), -- Run the simplifier after LiberateCase to vastly
1190 -- reduce the possiblility of shadowing
1191 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1193 runWhen spec_constr CoreDoSpecConstr,
1197 -- Final clean-up simplification:
1198 simpl_phase 0 ["final"] max_iter
1201 -- -----------------------------------------------------------------------------
1202 -- StgToDo: abstraction of stg-to-stg passes to run.
1205 = StgDoMassageForProfiling -- should be (next to) last
1206 -- There's also setStgVarInfo, but its absolute "lastness"
1207 -- is so critical that it is hardwired in (no flag).
1210 getStgToDo :: DynFlags -> [StgToDo]
1212 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1215 stg_stats = dopt Opt_StgStats dflags
1217 todo1 = if stg_stats then [D_stg_stats] else []
1219 todo2 | WayProf `elem` wayNames dflags
1220 = StgDoMassageForProfiling : todo1
1224 -- -----------------------------------------------------------------------------
1227 allFlags :: [String]
1228 allFlags = map ('-':) $
1229 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1230 map ("fno-"++) flags ++
1231 map ("f"++) flags ++
1232 map ("X"++) supportedLanguages ++
1233 map ("XNo"++) supportedLanguages
1234 where ok (PrefixPred _ _) = False
1236 flags = [ name | (name, _, _) <- fFlags ]
1238 dynamic_flags :: [Flag DynP]
1240 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1241 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1242 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1243 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1244 , Flag "v" (OptIntSuffix setVerbosity) Supported
1246 ------- Specific phases --------------------------------------------
1247 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1248 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1249 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1250 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1251 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1252 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1253 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1254 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1255 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1256 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1258 , Flag "optL" (HasArg (upd . addOptL)) Supported
1259 , Flag "optP" (HasArg (upd . addOptP)) Supported
1260 , Flag "optF" (HasArg (upd . addOptF)) Supported
1261 , Flag "optc" (HasArg (upd . addOptc)) Supported
1262 , Flag "optm" (HasArg (upd . addOptm)) Supported
1263 , Flag "opta" (HasArg (upd . addOpta)) Supported
1264 , Flag "optl" (HasArg (upd . addOptl)) Supported
1265 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1268 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1271 -------- ghc -M -----------------------------------------------------
1272 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1273 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1274 (Deprecated "Use -dep-suffix instead")
1275 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1276 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1277 (Deprecated "Use -dep-makefile instead")
1278 , Flag "optdep-w" (NoArg (return ()))
1279 (Deprecated "-optdep-w doesn't do anything")
1280 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1281 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1282 (Deprecated "Use -include-pkg-deps instead")
1283 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1284 (Deprecated "Use -include-pkg-deps instead")
1285 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1286 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1287 (Deprecated "Use -exclude-module instead")
1288 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1289 (Deprecated "Use -exclude-module instead")
1291 -------- Linking ----------------------------------------------------
1292 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1294 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1295 (Deprecated "Use -c instead")
1296 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1298 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1301 ------- Libraries ---------------------------------------------------
1302 , Flag "L" (Prefix addLibraryPath ) Supported
1303 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1305 ------- Frameworks --------------------------------------------------
1306 -- -framework-path should really be -F ...
1307 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1308 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1310 ------- Output Redirection ------------------------------------------
1311 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1312 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1313 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1314 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1315 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1316 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1317 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1318 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1319 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1320 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1321 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1324 ------- Keeping temporary files -------------------------------------
1325 -- These can be singular (think ghc -c) or plural (think ghc --make)
1326 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1327 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1328 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1329 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1330 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1331 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1332 -- This only makes sense as plural
1333 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1335 ------- Miscellaneous ----------------------------------------------
1336 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1337 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1338 , Flag "main-is" (SepArg setMainIs ) Supported
1339 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1340 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1341 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1343 ------- recompilation checker --------------------------------------
1344 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1345 (Deprecated "Use -fno-force-recomp instead")
1346 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1347 (Deprecated "Use -fforce-recomp instead")
1349 ------ HsCpp opts ---------------------------------------------------
1350 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1351 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1353 ------- Include/Import Paths ----------------------------------------
1354 , Flag "I" (Prefix addIncludePath) Supported
1355 , Flag "i" (OptPrefix addImportPath ) Supported
1357 ------ Debugging ----------------------------------------------------
1358 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1360 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1362 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1364 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1366 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1368 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1370 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1372 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1374 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1376 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1378 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1380 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1382 , Flag "ddump-asm-regalloc-stages"
1383 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1385 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1387 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1389 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1391 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1393 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1395 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1397 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1399 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1401 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1403 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1405 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1407 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1409 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1411 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1413 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1415 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1417 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1419 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1421 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1423 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1425 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1427 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1429 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1431 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1433 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1435 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1437 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1439 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1441 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1443 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1445 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1447 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1449 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1451 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1453 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1455 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1457 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1459 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1461 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1463 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1465 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1467 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1469 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1471 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1474 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1476 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1478 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1480 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1482 , Flag "dshow-passes"
1483 (NoArg (do forceRecompile
1484 setVerbosity (Just 2)))
1486 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1489 ------ Machine dependant (-m<blah>) stuff ---------------------------
1491 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1493 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1495 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1498 ------ Warning opts -------------------------------------------------
1499 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1501 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1503 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1505 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1507 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1508 (Deprecated "Use -w instead")
1509 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1512 ------ Optimisation flags ------------------------------------------
1513 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1514 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1515 (Deprecated "Use -O0 instead")
1516 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1517 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1519 -- If the number is missing, use 1
1521 , Flag "fsimplifier-phases"
1522 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1524 , Flag "fmax-simplifier-iterations"
1525 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1528 , Flag "fspec-constr-threshold"
1529 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1531 , Flag "fno-spec-constr-threshold"
1532 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1534 , Flag "fspec-constr-count"
1535 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1537 , Flag "fno-spec-constr-count"
1538 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1540 , Flag "fliberate-case-threshold"
1541 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1543 , Flag "fno-liberate-case-threshold"
1544 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1547 , Flag "frule-check"
1548 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1550 , Flag "fcontext-stack"
1551 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1554 ------ Profiling ----------------------------------------------------
1556 -- XXX Should the -f* flags be deprecated?
1557 -- They don't seem to be documented
1558 , Flag "fauto-sccs-on-all-toplevs"
1559 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1562 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1564 , Flag "no-auto-all"
1565 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1567 , Flag "fauto-sccs-on-exported-toplevs"
1568 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1571 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1574 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1576 , Flag "fauto-sccs-on-individual-cafs"
1577 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1580 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1583 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1586 ------ DPH flags ----------------------------------------------------
1589 (NoArg (setDPHBackend DPHSeq))
1592 (NoArg (setDPHBackend DPHPar))
1595 (NoArg (setDPHBackend DPHThis))
1598 ------ Compiler flags -----------------------------------------------
1600 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1601 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1602 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1604 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1605 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1606 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1608 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1610 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1613 ++ map (mkFlag True "f" setDynFlag ) fFlags
1614 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1615 ++ map (mkFlag True "X" setDynFlag ) xFlags
1616 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1618 package_flags :: [Flag DynP]
1620 ------- Packages ----------------------------------------------------
1621 Flag "package-conf" (HasArg extraPkgConf_) Supported
1622 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1624 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1625 , Flag "package" (HasArg exposePackage) Supported
1626 , Flag "hide-package" (HasArg hidePackage) Supported
1627 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1629 , Flag "ignore-package" (HasArg ignorePackage)
1631 , Flag "syslib" (HasArg exposePackage)
1632 (Deprecated "Use -package instead")
1635 mkFlag :: Bool -- ^ True <=> it should be turned on
1636 -> String -- ^ The flag prefix
1637 -> (DynFlag -> DynP ())
1638 -> (String, DynFlag, Bool -> Deprecated)
1640 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1641 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1643 deprecatedForLanguage :: String -> Bool -> Deprecated
1644 deprecatedForLanguage lang turn_on
1645 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1647 flag | turn_on = lang
1648 | otherwise = "No"++lang
1650 useInstead :: String -> Bool -> Deprecated
1651 useInstead flag turn_on
1652 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1654 no = if turn_on then "" else "no-"
1656 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1657 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1659 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1660 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1661 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1662 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1663 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1664 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1665 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1666 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1667 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1668 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1669 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1670 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1671 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1672 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1673 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1674 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1675 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1676 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1677 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1678 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1679 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1680 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1681 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1682 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1683 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1684 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1685 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1686 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1687 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1688 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1689 ( "strictness", Opt_Strictness, const Supported ),
1690 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1691 ( "full-laziness", Opt_FullLaziness, const Supported ),
1692 ( "liberate-case", Opt_LiberateCase, const Supported ),
1693 ( "spec-constr", Opt_SpecConstr, const Supported ),
1694 ( "cse", Opt_CSE, const Supported ),
1695 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1696 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1697 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1698 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1699 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1700 ( "case-merge", Opt_CaseMerge, const Supported ),
1701 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1702 ( "method-sharing", Opt_MethodSharing, const Supported ),
1703 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1704 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1705 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1706 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1707 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1708 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1709 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1710 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1711 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1712 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1713 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1714 ( "break-on-error", Opt_BreakOnError, const Supported ),
1715 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1716 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1717 ( "run-cps", Opt_RunCPS, const Supported ),
1718 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1719 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1720 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1721 ( "vectorise", Opt_Vectorise, const Supported ),
1722 ( "regs-graph", Opt_RegsGraph, const Supported ),
1723 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1724 ( "th", Opt_TemplateHaskell,
1725 deprecatedForLanguage "TemplateHaskell" ),
1726 ( "fi", Opt_ForeignFunctionInterface,
1727 deprecatedForLanguage "ForeignFunctionInterface" ),
1728 ( "ffi", Opt_ForeignFunctionInterface,
1729 deprecatedForLanguage "ForeignFunctionInterface" ),
1730 ( "arrows", Opt_Arrows,
1731 deprecatedForLanguage "Arrows" ),
1732 ( "generics", Opt_Generics,
1733 deprecatedForLanguage "Generics" ),
1734 ( "implicit-prelude", Opt_ImplicitPrelude,
1735 deprecatedForLanguage "ImplicitPrelude" ),
1736 ( "bang-patterns", Opt_BangPatterns,
1737 deprecatedForLanguage "BangPatterns" ),
1738 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1739 deprecatedForLanguage "MonomorphismRestriction" ),
1740 ( "mono-pat-binds", Opt_MonoPatBinds,
1741 deprecatedForLanguage "MonoPatBinds" ),
1742 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1743 deprecatedForLanguage "ExtendedDefaultRules" ),
1744 ( "implicit-params", Opt_ImplicitParams,
1745 deprecatedForLanguage "ImplicitParams" ),
1746 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1747 deprecatedForLanguage "ScopedTypeVariables" ),
1749 deprecatedForLanguage "PArr" ),
1750 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1751 deprecatedForLanguage "OverlappingInstances" ),
1752 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1753 deprecatedForLanguage "UndecidableInstances" ),
1754 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1755 deprecatedForLanguage "IncoherentInstances" ),
1756 ( "gen-manifest", Opt_GenManifest, const Supported ),
1757 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1758 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1759 ( "shared-implib", Opt_SharedImplib, const Supported ),
1760 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1763 supportedLanguages :: [String]
1764 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1766 -- This may contain duplicates
1767 languageOptions :: [DynFlag]
1768 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1770 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1771 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1773 ( "CPP", Opt_Cpp, const Supported ),
1774 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1775 ( "TupleSections", Opt_TupleSections, const Supported ),
1776 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1777 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1778 ( "MagicHash", Opt_MagicHash, const Supported ),
1779 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1780 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1781 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1782 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1783 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1784 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1785 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1786 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1787 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1788 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1789 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1790 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1791 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1792 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1793 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1794 ( "Arrows", Opt_Arrows, const Supported ),
1795 ( "PArr", Opt_PArr, const Supported ),
1796 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1797 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1798 ( "Generics", Opt_Generics, const Supported ),
1800 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1801 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1802 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1803 ( "RecordPuns", Opt_RecordPuns,
1804 deprecatedForLanguage "NamedFieldPuns" ),
1805 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1806 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1807 ( "GADTs", Opt_GADTs, const Supported ),
1808 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1809 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1810 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1812 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1814 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1815 -- On by default (which is not strictly H98):
1816 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1817 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1818 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1819 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1820 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1821 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1823 ( "PatternSignatures", Opt_ScopedTypeVariables,
1824 deprecatedForLanguage "ScopedTypeVariables" ),
1826 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1827 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1828 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1829 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1830 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1831 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1832 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1833 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1834 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1835 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1836 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1837 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1838 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1839 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1840 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1841 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1842 ( "PackageImports", Opt_PackageImports, const Supported ),
1843 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1846 impliedFlags :: [(DynFlag, DynFlag)]
1848 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1849 -- be completely rigid for GADTs
1851 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1852 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1853 -- all over the place
1855 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1856 -- Note [Scoped tyvars] in TcBinds
1857 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1860 glasgowExtsFlags :: [DynFlag]
1861 glasgowExtsFlags = [
1862 Opt_PrintExplicitForalls
1863 , Opt_ForeignFunctionInterface
1864 , Opt_UnliftedFFITypes
1866 , Opt_ImplicitParams
1867 , Opt_ScopedTypeVariables
1869 , Opt_TypeSynonymInstances
1870 , Opt_StandaloneDeriving
1871 , Opt_DeriveDataTypeable
1873 , Opt_DeriveFoldable
1874 , Opt_DeriveTraversable
1875 , Opt_FlexibleContexts
1876 , Opt_FlexibleInstances
1877 , Opt_ConstrainedClassMethods
1878 , Opt_MultiParamTypeClasses
1879 , Opt_FunctionalDependencies
1881 , Opt_PolymorphicComponents
1882 , Opt_ExistentialQuantification
1884 , Opt_PostfixOperators
1886 , Opt_LiberalTypeSynonyms
1890 , Opt_ParallelListComp
1891 , Opt_EmptyDataDecls
1892 , Opt_KindSignatures
1893 , Opt_GeneralizedNewtypeDeriving
1894 , Opt_TypeFamilies ]
1896 -- -----------------------------------------------------------------------------
1897 -- Parsing the dynamic flags.
1899 -- | Parse dynamic flags from a list of command line arguments. Returns the
1900 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1901 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1902 -- flags or missing arguments).
1903 parseDynamicFlags :: Monad m =>
1904 DynFlags -> [Located String]
1905 -> m (DynFlags, [Located String], [Located String])
1906 -- ^ Updated 'DynFlags', left-over arguments, and
1907 -- list of warnings.
1908 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1910 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1911 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1912 parseDynamicNoPackageFlags :: Monad m =>
1913 DynFlags -> [Located String]
1914 -> m (DynFlags, [Located String], [Located String])
1915 -- ^ Updated 'DynFlags', left-over arguments, and
1916 -- list of warnings.
1917 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1919 parseDynamicFlags_ :: Monad m =>
1920 DynFlags -> [Located String] -> Bool
1921 -> m (DynFlags, [Located String], [Located String])
1922 parseDynamicFlags_ dflags args pkg_flags = do
1923 -- XXX Legacy support code
1924 -- We used to accept things like
1925 -- optdep-f -optdepdepend
1926 -- optdep-f -optdep depend
1927 -- optdep -f -optdepdepend
1928 -- optdep -f -optdep depend
1929 -- but the spaces trip up proper argument handling. So get rid of them.
1930 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1931 f (x : xs) = x : f xs
1935 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1936 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1937 | otherwise = dynamic_flags
1939 let ((leftover, errs, warns), dflags')
1940 = runCmdLine (processArgs flag_spec args') dflags
1941 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1942 return (dflags', leftover, warns)
1944 type DynP = CmdLineP DynFlags
1946 upd :: (DynFlags -> DynFlags) -> DynP ()
1948 dfs <- getCmdLineState
1949 putCmdLineState $! (f dfs)
1951 --------------------------
1952 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1953 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1954 ; mapM_ setDynFlag deps }
1956 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1957 -- When you set f, set the ones it implies
1958 -- NB: use setDynFlag recursively, in case the implied flags
1959 -- implies further flags
1960 -- When you un-set f, however, we don't un-set the things it implies
1961 -- (except for -fno-glasgow-exts, which is treated specially)
1963 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1965 --------------------------
1966 setDumpFlag :: DynFlag -> OptKind DynP
1967 setDumpFlag dump_flag
1968 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1970 -- Certain dumpy-things are really interested in what's going
1971 -- on during recompilation checking, so in those cases we
1972 -- don't want to turn it off.
1973 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1974 Opt_D_dump_hi_diffs]
1976 forceRecompile :: DynP ()
1977 -- Whenver we -ddump, force recompilation (by switching off the
1978 -- recompilation checker), else you don't see the dump! However,
1979 -- don't switch it off in --make mode, else *everything* gets
1980 -- recompiled which probably isn't what you want
1981 forceRecompile = do { dfs <- getCmdLineState
1982 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1984 force_recomp dfs = isOneShot (ghcMode dfs)
1986 setVerboseCore2Core :: DynP ()
1987 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1989 upd (\s -> s { shouldDumpSimplPhase = const True })
1991 setDumpSimplPhases :: String -> DynP ()
1992 setDumpSimplPhases s = do forceRecompile
1993 upd (\s -> s { shouldDumpSimplPhase = spec })
1995 spec :: SimplifierMode -> Bool
1997 . map (join (&&) . map match . split ':')
2003 join :: (Bool -> Bool -> Bool)
2004 -> [SimplifierMode -> Bool]
2005 -> SimplifierMode -> Bool
2006 join _ [] = const True
2007 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2009 match :: String -> SimplifierMode -> Bool
2010 match "" = const True
2011 match s = case reads s of
2012 [(n,"")] -> phase_num n
2015 phase_num :: Int -> SimplifierMode -> Bool
2016 phase_num n (SimplPhase k _) = n == k
2017 phase_num _ _ = False
2019 phase_name :: String -> SimplifierMode -> Bool
2020 phase_name s SimplGently = s == "gentle"
2021 phase_name s (SimplPhase _ ss) = s `elem` ss
2023 setVerbosity :: Maybe Int -> DynP ()
2024 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2026 addCmdlineHCInclude :: String -> DynP ()
2027 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2029 extraPkgConf_ :: FilePath -> DynP ()
2030 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2032 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2034 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2036 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2038 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2040 setPackageName :: String -> DynFlags -> DynFlags
2042 | Nothing <- unpackPackageId pid
2043 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2045 = \s -> s{ thisPackage = pid }
2047 pid = stringToPackageId p
2049 -- If we're linking a binary, then only targets that produce object
2050 -- code are allowed (requests for other target types are ignored).
2051 setTarget :: HscTarget -> DynP ()
2052 setTarget l = upd set
2055 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2058 -- Changes the target only if we're compiling object code. This is
2059 -- used by -fasm and -fvia-C, which switch from one to the other, but
2060 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2061 -- can be safely used in an OPTIONS_GHC pragma.
2062 setObjTarget :: HscTarget -> DynP ()
2063 setObjTarget l = upd set
2066 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2069 setOptLevel :: Int -> DynFlags -> DynFlags
2070 setOptLevel n dflags
2071 | hscTarget dflags == HscInterpreted && n > 0
2073 -- not in IO any more, oh well:
2074 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2076 = updOptLevel n dflags
2079 -- -Odph is equivalent to
2081 -- -O2 optimise as much as possible
2082 -- -fno-method-sharing sharing specialisation defeats fusion
2084 -- -fdicts-cheap always inline dictionaries
2085 -- -fmax-simplifier-iterations20 this is necessary sometimes
2086 -- -fsimplifier-phases=3 we use an additional simplifier phase
2088 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2089 -- -fno-spec-constr-count SpecConstr as much as possible
2090 -- -finline-enough-args hack to prevent excessive inlining
2092 setDPHOpt :: DynFlags -> DynFlags
2093 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2095 , specConstrThreshold = Nothing
2096 , specConstrCount = Nothing
2098 `dopt_set` Opt_DictsCheap
2099 `dopt_unset` Opt_MethodSharing
2100 `dopt_set` Opt_InlineIfEnoughArgs
2102 data DPHBackend = DPHPar
2105 deriving(Eq, Ord, Enum, Show)
2107 setDPHBackend :: DPHBackend -> DynP ()
2108 setDPHBackend backend
2110 upd $ \dflags -> dflags { dphBackend = backend }
2111 mapM_ exposePackage (dph_packages backend)
2113 dph_packages DPHThis = []
2114 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2115 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2117 dphPackage :: DynFlags -> PackageId
2118 dphPackage dflags = case dphBackend dflags of
2119 DPHPar -> dphParPackageId
2120 DPHSeq -> dphSeqPackageId
2121 DPHThis -> thisPackage dflags
2123 setMainIs :: String -> DynP ()
2125 | not (null main_fn) && isLower (head main_fn)
2126 -- The arg looked like "Foo.Bar.baz"
2127 = upd $ \d -> d{ mainFunIs = Just main_fn,
2128 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2130 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2131 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2133 | otherwise -- The arg looked like "baz"
2134 = upd $ \d -> d{ mainFunIs = Just arg }
2136 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2138 -----------------------------------------------------------------------------
2139 -- Paths & Libraries
2141 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2143 -- -i on its own deletes the import paths
2144 addImportPath "" = upd (\s -> s{importPaths = []})
2145 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2149 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2152 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2154 addFrameworkPath p =
2155 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2157 #ifndef mingw32_TARGET_OS
2158 split_marker :: Char
2159 split_marker = ':' -- not configurable (ToDo)
2162 splitPathList :: String -> [String]
2163 splitPathList s = filter notNull (splitUp s)
2164 -- empty paths are ignored: there might be a trailing
2165 -- ':' in the initial list, for example. Empty paths can
2166 -- cause confusion when they are translated into -I options
2167 -- for passing to gcc.
2169 #ifndef mingw32_TARGET_OS
2170 splitUp xs = split split_marker xs
2172 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2174 -- That is, if "foo:bar:baz" is used, this interpreted as
2175 -- consisting of three entries, 'foo', 'bar', 'baz'.
2176 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2177 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2179 -- Notice that no attempt is made to fully replace the 'standard'
2180 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2181 -- that this will cause too much breakage for users & ':' will
2182 -- work fine even with DOS paths, if you're not insisting on being silly.
2185 splitUp (x:':':div:xs) | div `elem` dir_markers
2186 = ((x:':':div:p): splitUp rs)
2188 (p,rs) = findNextPath xs
2189 -- we used to check for existence of the path here, but that
2190 -- required the IO monad to be threaded through the command-line
2191 -- parser which is quite inconvenient. The
2192 splitUp xs = cons p (splitUp rs)
2194 (p,rs) = findNextPath xs
2199 -- will be called either when we've consumed nought or the
2200 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2201 -- finding the next split marker.
2203 case break (`elem` split_markers) xs of
2204 (p, _:ds) -> (p, ds)
2207 split_markers :: [Char]
2208 split_markers = [':', ';']
2210 dir_markers :: [Char]
2211 dir_markers = ['/', '\\']
2214 -- -----------------------------------------------------------------------------
2215 -- tmpDir, where we store temporary files.
2217 setTmpDir :: FilePath -> DynFlags -> DynFlags
2218 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2219 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2220 -- seem necessary now --SDM 7/2/2008
2222 -----------------------------------------------------------------------------
2225 setOptHpcDir :: String -> DynP ()
2226 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2228 -----------------------------------------------------------------------------
2229 -- Via-C compilation stuff
2231 -- There are some options that we need to pass to gcc when compiling
2232 -- Haskell code via C, but are only supported by recent versions of
2233 -- gcc. The configure script decides which of these options we need,
2234 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2235 -- read before each via-C compilation. The advantage of having these
2236 -- in a separate file is that the file can be created at install-time
2237 -- depending on the available gcc version, and even re-generated later
2238 -- if gcc is upgraded.
2240 -- The options below are not dependent on the version of gcc, only the
2243 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2244 [String]) -- for registerised HC compilations
2245 machdepCCOpts _dflags
2246 #if alpha_TARGET_ARCH
2248 #ifdef HAVE_THREADED_RTS_SUPPORT
2252 -- For now, to suppress the gcc warning "call-clobbered
2253 -- register used for global register variable", we simply
2254 -- disable all warnings altogether using the -w flag. Oh well.
2256 #elif hppa_TARGET_ARCH
2257 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2258 -- (very nice, but too bad the HP /usr/include files don't agree.)
2259 = ( ["-D_HPUX_SOURCE"], [] )
2261 #elif m68k_TARGET_ARCH
2262 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2263 -- popping of args to routines to be explicit; if we let things
2264 -- be deferred 'til after an STGJUMP, imminent death is certain!
2266 -- -fomit-frame-pointer : *don't*
2267 -- It's better to have a6 completely tied up being a frame pointer
2268 -- rather than let GCC pick random things to do with it.
2269 -- (If we want to steal a6, then we would try to do things
2270 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2271 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2273 #elif i386_TARGET_ARCH
2274 -- -fno-defer-pop : basically the same game as for m68k
2276 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2277 -- the fp (%ebp) for our register maps.
2278 = let n_regs = stolen_x86_regs _dflags
2281 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2284 "-fomit-frame-pointer",
2285 -- we want -fno-builtin, because when gcc inlines
2286 -- built-in functions like memcpy() it tends to
2287 -- run out of registers, requiring -monly-n-regs
2289 "-DSTOLEN_X86_REGS="++show n_regs ]
2292 #elif ia64_TARGET_ARCH
2293 = ( [], ["-fomit-frame-pointer", "-G0"] )
2295 #elif x86_64_TARGET_ARCH
2297 #if darwin_TARGET_OS
2302 ["-fomit-frame-pointer",
2303 "-fno-asynchronous-unwind-tables",
2304 -- the unwind tables are unnecessary for HC code,
2305 -- and get in the way of -split-objs. Another option
2306 -- would be to throw them away in the mangler, but this
2309 -- calling builtins like strlen() using the FFI can
2310 -- cause gcc to run out of regs, so use the external
2314 #elif sparc_TARGET_ARCH
2316 -- For now, to suppress the gcc warning "call-clobbered
2317 -- register used for global register variable", we simply
2318 -- disable all warnings altogether using the -w flag. Oh well.
2320 #elif powerpc_apple_darwin_TARGET
2322 -- Disable Apple's precompiling preprocessor. It's a great thing
2323 -- for "normal" programs, but it doesn't support register variable
2325 = ( [], ["-no-cpp-precomp"] )
2330 picCCOpts :: DynFlags -> [String]
2332 #if darwin_TARGET_OS
2333 -- Apple prefers to do things the other way round.
2334 -- PIC is on by default.
2335 -- -mdynamic-no-pic:
2336 -- Turn off PIC code generation.
2338 -- Don't generate "common" symbols - these are unwanted
2339 -- in dynamic libraries.
2342 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2344 = ["-mdynamic-no-pic"]
2345 #elif mingw32_TARGET_OS
2346 -- no -fPIC for Windows
2348 = ["-U __PIC__","-D__PIC__"]
2352 | opt_PIC || not opt_Static
2353 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2358 -- -----------------------------------------------------------------------------
2362 can_split = cSplitObjs == "YES"
2364 -- -----------------------------------------------------------------------------
2367 data Printable = String String
2368 | FromDynFlags (DynFlags -> String)
2370 compilerInfo :: [(String, Printable)]
2371 compilerInfo = [("Project name", String cProjectName),
2372 ("Project version", String cProjectVersion),
2373 ("Booter version", String cBooterVersion),
2374 ("Stage", String cStage),
2375 ("Have interpreter", String cGhcWithInterpreter),
2376 ("Object splitting", String cSplitObjs),
2377 ("Have native code generator", String cGhcWithNativeCodeGen),
2378 ("Support SMP", String cGhcWithSMP),
2379 ("Unregisterised", String cGhcUnregisterised),
2380 ("Tables next to code", String cGhcEnableTablesNextToCode),
2381 ("Win32 DLLs", String cEnableWin32DLLs),
2382 ("RTS ways", String cGhcRTSWays),
2383 ("Leading underscore", String cLeadingUnderscore),
2384 ("Debug on", String (show debugIsOn)),
2385 ("LibDir", FromDynFlags topDir)