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
254 | Opt_LiberalTypeSynonyms
257 | Opt_ImpredicativeTypes
260 | Opt_NewQualifiedOperators
262 | Opt_PrintExplicitForalls
267 | Opt_StaticArgumentTransformation
271 | Opt_IgnoreInterfacePragmas
272 | Opt_OmitInterfacePragmas
273 | Opt_DoLambdaEtaExpansion
277 | Opt_UnboxStrictFields
280 | Opt_InlineIfEnoughArgs
281 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
283 | Opt_RegsGraph -- do graph coloring register allocation
284 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
287 | Opt_AutoSccsOnAllToplevs
288 | Opt_AutoSccsOnExportedToplevs
289 | Opt_AutoSccsOnIndividualCafs
297 | Opt_ExcessPrecision
298 | Opt_EagerBlackHoling
299 | Opt_ReadUserPackageConf
303 | Opt_HideAllPackages
304 | Opt_PrintBindResult
308 | Opt_BreakOnException
310 | Opt_PrintEvldWithShow
311 | Opt_PrintBindContents
314 | Opt_EmitExternalCore
320 | Opt_ConvertToZipCfgAndBack
321 | Opt_AutoLinkPackages
322 | Opt_ImplicitImportQualified
331 | Opt_KeepRawTokenStream
335 -- | Contains not only a collection of 'DynFlag's but also a plethora of
336 -- information relating to the compilation of a single file or GHC session
337 data DynFlags = DynFlags {
340 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
341 stgToDo :: Maybe [StgToDo], -- similarly
342 hscTarget :: HscTarget,
343 hscOutName :: String, -- ^ Name of the output file
344 extCoreName :: String, -- ^ Name of the .hcr output file
345 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
346 optLevel :: Int, -- ^ Optimisation level
347 simplPhases :: Int, -- ^ Number of simplifier phases
348 maxSimplIterations :: Int, -- ^ Max simplifier iterations
349 shouldDumpSimplPhase :: SimplifierMode -> Bool,
350 ruleCheck :: Maybe String,
352 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
353 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
354 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
356 #ifndef OMIT_NATIVE_CODEGEN
357 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
359 stolen_x86_regs :: Int,
360 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
361 importPaths :: [FilePath],
363 mainFunIs :: Maybe String,
364 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
366 dphBackend :: DPHBackend,
368 thisPackage :: PackageId, -- ^ name of package currently being compiled
371 wayNames :: [WayName], -- ^ Way flags from the command line
372 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
373 rtsBuildTag :: String, -- ^ The RTS \"way\"
375 -- For object splitting
376 splitInfo :: Maybe (String,Int),
379 objectDir :: Maybe String,
380 hiDir :: Maybe String,
381 stubDir :: Maybe String,
387 outputFile :: Maybe String,
388 outputHi :: Maybe String,
389 dynLibLoader :: DynLibLoader,
391 -- | This is set by 'DriverPipeline.runPipeline' based on where
392 -- its output is going.
393 dumpPrefix :: Maybe FilePath,
395 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
396 -- Set by @-ddump-file-prefix@
397 dumpPrefixForce :: Maybe FilePath,
399 includePaths :: [String],
400 libraryPaths :: [String],
401 frameworkPaths :: [String], -- used on darwin only
402 cmdlineFrameworks :: [String], -- ditto
403 tmpDir :: String, -- no trailing '/'
405 ghcUsagePath :: FilePath, -- Filled in by SysTools
406 ghciUsagePath :: FilePath, -- ditto
408 hpcDir :: String, -- ^ Path to store the .mix files
410 -- options for particular phases
418 opt_windres :: [String],
420 -- commands for particular phases
422 pgm_P :: (String,[Option]),
424 pgm_c :: (String,[Option]),
425 pgm_m :: (String,[Option]),
426 pgm_s :: (String,[Option]),
427 pgm_a :: (String,[Option]),
428 pgm_l :: (String,[Option]),
429 pgm_dll :: (String,[Option]),
431 pgm_sysman :: String,
432 pgm_windres :: String,
435 depMakefile :: FilePath,
436 depIncludePkgDeps :: Bool,
437 depExcludeMods :: [ModuleName],
438 depSuffixes :: [String],
441 extraPkgConfs :: [FilePath],
442 topDir :: FilePath, -- filled in by SysTools
443 systemPackageConfig :: FilePath, -- ditto
444 -- ^ The @-package-conf@ flags given on the command line, in the order
447 packageFlags :: [PackageFlag],
448 -- ^ The @-package@ and @-hide-package@ flags from the command-line
451 -- NB. do not modify this field, it is calculated by
452 -- Packages.initPackages and Packages.updatePackages.
453 pkgDatabase :: Maybe (UniqFM PackageConfig),
454 pkgState :: PackageState,
457 -- These have to be IORefs, because the defaultCleanupHandler needs to
458 -- know what to clean when an exception happens
459 filesToClean :: IORef [FilePath],
460 dirsToClean :: IORef (FiniteMap FilePath FilePath),
465 -- | Message output action: use "ErrUtils" instead of this if you can
466 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
468 haddockOptions :: Maybe String
471 -- | The target code type of the compilation (if any).
473 -- Whenever you change the target, also make sure to set 'ghcLink' to
474 -- something sensible.
476 -- 'HscNothing' can be used to avoid generating any output, however, note
479 -- * This will not run the desugaring step, thus no warnings generated in
480 -- this step will be output. In particular, this includes warnings related
481 -- to pattern matching. You can run the desugarer manually using
482 -- 'GHC.desugarModule'.
484 -- * If a program uses Template Haskell the typechecker may try to run code
485 -- from an imported module. This will fail if no code has been generated
486 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
487 -- whether this might be the case and choose to either switch to a
488 -- different target or avoid typechecking such modules. (The latter may
489 -- preferable for security reasons.)
492 = HscC -- ^ Generate C code.
493 | HscAsm -- ^ Generate assembly using the native code generator.
494 | HscJava -- ^ Generate Java bytecode.
495 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
496 | HscNothing -- ^ Don't generate any code. See notes above.
499 -- | Will this target result in an object file on the disk?
500 isObjectTarget :: HscTarget -> Bool
501 isObjectTarget HscC = True
502 isObjectTarget HscAsm = True
503 isObjectTarget _ = False
505 -- | The 'GhcMode' tells us whether we're doing multi-module
506 -- compilation (controlled via the "GHC" API) or one-shot
507 -- (single-module) compilation. This makes a difference primarily to
508 -- the "Finder": in one-shot mode we look for interface files for
509 -- imported modules, but in multi-module mode we look for source files
510 -- in order to check whether they need to be recompiled.
512 = CompManager -- ^ @\-\-make@, GHCi, etc.
513 | OneShot -- ^ @ghc -c Foo.hs@
514 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
517 instance Outputable GhcMode where
518 ppr CompManager = ptext (sLit "CompManager")
519 ppr OneShot = ptext (sLit "OneShot")
520 ppr MkDepend = ptext (sLit "MkDepend")
522 isOneShot :: GhcMode -> Bool
523 isOneShot OneShot = True
524 isOneShot _other = False
526 -- | What to do in the link step, if there is one.
528 = NoLink -- ^ Don't link at all
529 | LinkBinary -- ^ Link object code into a binary
530 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
531 -- bytecode and object code).
532 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
535 isNoLink :: GhcLink -> Bool
536 isNoLink NoLink = True
539 -- Is it worth evaluating this Bool and caching it in the DynFlags value
540 -- during initDynFlags?
541 doingTickyProfiling :: DynFlags -> Bool
542 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
545 = ExposePackage String
547 | IgnorePackage String
550 defaultHscTarget :: HscTarget
551 defaultHscTarget = defaultObjectTarget
553 -- | The 'HscTarget' value corresponding to the default way to create
554 -- object files on the current platform.
555 defaultObjectTarget :: HscTarget
557 | cGhcWithNativeCodeGen == "YES" = HscAsm
562 | Wrapped (Maybe String)
566 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
567 initDynFlags :: DynFlags -> IO DynFlags
568 initDynFlags dflags = do
569 -- someday these will be dynamic flags
570 ways <- readIORef v_Ways
571 build_tag <- readIORef v_Build_tag
572 rts_build_tag <- readIORef v_RTS_Build_tag
573 refFilesToClean <- newIORef []
574 refDirsToClean <- newIORef emptyFM
577 buildTag = build_tag,
578 rtsBuildTag = rts_build_tag,
579 filesToClean = refFilesToClean,
580 dirsToClean = refDirsToClean
583 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
584 -- and must be fully initialized by 'GHC.newSession' first.
585 defaultDynFlags :: DynFlags
588 ghcMode = CompManager,
589 ghcLink = LinkBinary,
592 hscTarget = defaultHscTarget,
598 maxSimplIterations = 4,
599 shouldDumpSimplPhase = const False,
601 specConstrThreshold = Just 200,
602 specConstrCount = Just 3,
603 liberateCaseThreshold = Just 200,
604 #ifndef OMIT_NATIVE_CODEGEN
605 targetPlatform = defaultTargetPlatform,
608 cmdlineHcIncludes = [],
612 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
616 thisPackage = mainPackageId,
622 objectSuf = phaseInputExt StopLn,
623 hcSuf = phaseInputExt HCc,
626 outputFile = Nothing,
628 dynLibLoader = SystemDependent,
629 dumpPrefix = Nothing,
630 dumpPrefixForce = Nothing,
634 cmdlineFrameworks = [],
635 tmpDir = cDEFAULT_TMPDIR,
641 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
652 pkgDatabase = Nothing,
653 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
654 wayNames = panic "defaultDynFlags: No wayNames",
655 buildTag = panic "defaultDynFlags: No buildTag",
656 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
658 -- initSysTools fills all these in
659 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
660 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
661 topDir = panic "defaultDynFlags: No topDir",
662 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
663 pgm_L = panic "defaultDynFlags: No pgm_L",
664 pgm_P = panic "defaultDynFlags: No pgm_P",
665 pgm_F = panic "defaultDynFlags: No pgm_F",
666 pgm_c = panic "defaultDynFlags: No pgm_c",
667 pgm_m = panic "defaultDynFlags: No pgm_m",
668 pgm_s = panic "defaultDynFlags: No pgm_s",
669 pgm_a = panic "defaultDynFlags: No pgm_a",
670 pgm_l = panic "defaultDynFlags: No pgm_l",
671 pgm_dll = panic "defaultDynFlags: No pgm_dll",
672 pgm_T = panic "defaultDynFlags: No pgm_T",
673 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
674 pgm_windres = panic "defaultDynFlags: No pgm_windres",
675 -- end of initSysTools values
677 depMakefile = "Makefile",
678 depIncludePkgDeps = False,
681 -- end of ghc -M values
682 filesToClean = panic "defaultDynFlags: No filesToClean",
683 dirsToClean = panic "defaultDynFlags: No dirsToClean",
684 haddockOptions = Nothing,
686 Opt_AutoLinkPackages,
687 Opt_ReadUserPackageConf,
689 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
690 -- behaviour the default, to see if anyone notices
694 Opt_MonomorphismRestriction,
704 Opt_PrintBindContents
706 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
707 -- The default -O0 options
710 log_action = \severity srcSpan style msg ->
712 SevInfo -> printErrs (msg style)
713 SevFatal -> printErrs (msg style)
716 printErrs ((mkLocMessage srcSpan msg) style)
717 -- careful (#2302): printErrs prints in UTF-8, whereas
718 -- converting to string first and using hPutStr would
719 -- just emit the low 8 bits of each unicode char.
726 0 | print errors & warnings only
727 1 | minimal verbosity: print "compiling M ... done." for each module.
728 2 | equivalent to -dshow-passes
729 3 | equivalent to existing "ghc -v"
730 4 | "ghc -v -ddump-most"
731 5 | "ghc -v -ddump-all"
734 -- | Test whether a 'DynFlag' is set
735 dopt :: DynFlag -> DynFlags -> Bool
736 dopt f dflags = f `elem` (flags dflags)
739 dopt_set :: DynFlags -> DynFlag -> DynFlags
740 dopt_set dfs f = dfs{ flags = f : flags dfs }
742 -- | Unset a 'DynFlag'
743 dopt_unset :: DynFlags -> DynFlag -> DynFlags
744 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
746 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
747 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
748 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
749 -> [a] -- ^ Correctly ordered extracted options
750 getOpts dflags opts = reverse (opts dflags)
751 -- We add to the options from the front, so we need to reverse the list
753 -- | Gets the verbosity flag for the current verbosity level. This is fed to
754 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
755 getVerbFlag :: DynFlags -> String
757 | verbosity dflags >= 3 = "-v"
760 setObjectDir, setHiDir, setStubDir, setOutputDir,
761 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
762 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
763 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
764 addCmdlineFramework, addHaddockOpts
765 :: String -> DynFlags -> DynFlags
766 setOutputFile, setOutputHi, setDumpPrefixForce
767 :: Maybe String -> DynFlags -> DynFlags
769 setObjectDir f d = d{ objectDir = Just f}
770 setHiDir f d = d{ hiDir = Just f}
771 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
772 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
773 -- \#included from the .hc file when compiling with -fvia-C.
774 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
776 setObjectSuf f d = d{ objectSuf = f}
777 setHiSuf f d = d{ hiSuf = f}
778 setHcSuf f d = d{ hcSuf = f}
780 setOutputFile f d = d{ outputFile = f}
781 setOutputHi f d = d{ outputHi = f}
783 parseDynLibLoaderMode f d =
785 ("deploy", "") -> d{ dynLibLoader = Deployable }
786 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
787 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
788 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
789 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
790 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
792 setDumpPrefixForce f d = d { dumpPrefixForce = f}
794 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
795 -- Config.hs should really use Option.
796 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
798 setPgmL f d = d{ pgm_L = f}
799 setPgmF f d = d{ pgm_F = f}
800 setPgmc f d = d{ pgm_c = (f,[])}
801 setPgmm f d = d{ pgm_m = (f,[])}
802 setPgms f d = d{ pgm_s = (f,[])}
803 setPgma f d = d{ pgm_a = (f,[])}
804 setPgml f d = d{ pgm_l = (f,[])}
805 setPgmdll f d = d{ pgm_dll = (f,[])}
806 setPgmwindres f d = d{ pgm_windres = f}
808 addOptL f d = d{ opt_L = f : opt_L d}
809 addOptP f d = d{ opt_P = f : opt_P d}
810 addOptF f d = d{ opt_F = f : opt_F d}
811 addOptc f d = d{ opt_c = f : opt_c d}
812 addOptm f d = d{ opt_m = f : opt_m d}
813 addOpta f d = d{ opt_a = f : opt_a d}
814 addOptl f d = d{ opt_l = f : opt_l d}
815 addOptwindres f d = d{ opt_windres = f : opt_windres d}
817 setDepMakefile :: FilePath -> DynFlags -> DynFlags
818 setDepMakefile f d = d { depMakefile = deOptDep f }
820 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
821 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
823 addDepExcludeMod :: String -> DynFlags -> DynFlags
825 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
827 addDepSuffix :: FilePath -> DynFlags -> DynFlags
828 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
831 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
832 -- we need to strip the "-optdep" off of the arg
833 deOptDep :: String -> String
834 deOptDep x = case stripPrefix "-optdep" x of
838 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
840 addHaddockOpts f d = d{ haddockOptions = Just f}
842 -- -----------------------------------------------------------------------------
843 -- Command-line options
845 -- | When invoking external tools as part of the compilation pipeline, we
846 -- pass these a sequence of options on the command-line. Rather than
847 -- just using a list of Strings, we use a type that allows us to distinguish
848 -- between filepaths and 'other stuff'. The reason for this is that
849 -- this type gives us a handle on transforming filenames, and filenames only,
850 -- to whatever format they're expected to be on a particular platform.
852 = FileOption -- an entry that _contains_ filename(s) / filepaths.
853 String -- a non-filepath prefix that shouldn't be
854 -- transformed (e.g., "/out=")
855 String -- the filepath/filename portion
858 showOpt :: Option -> String
859 showOpt (FileOption pre f) = pre ++ f
860 showOpt (Option s) = s
862 -----------------------------------------------------------------------------
863 -- Setting the optimisation level
865 updOptLevel :: Int -> DynFlags -> DynFlags
866 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
868 = dfs2{ optLevel = final_n }
870 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
871 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
872 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
874 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
875 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
877 optLevelFlags :: [([Int], DynFlag)]
879 = [ ([0], Opt_IgnoreInterfacePragmas)
880 , ([0], Opt_OmitInterfacePragmas)
882 , ([1,2], Opt_IgnoreAsserts)
883 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
885 , ([1,2], Opt_DoEtaReduction)
886 , ([1,2], Opt_CaseMerge)
887 , ([1,2], Opt_Strictness)
889 , ([1,2], Opt_FullLaziness)
891 , ([2], Opt_LiberateCase)
892 , ([2], Opt_SpecConstr)
894 -- , ([2], Opt_StaticArgumentTransformation)
895 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
896 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
897 -- several improvements to the heuristics, and I'm concerned that without
898 -- those changes SAT will interfere with some attempts to write "high
899 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
900 -- this year. In particular, the version in HEAD lacks the tail call
901 -- criterion, so many things that look like reasonable loops will be
902 -- turned into functions with extra (unneccesary) thunk creation.
904 , ([0,1,2], Opt_DoLambdaEtaExpansion)
905 -- This one is important for a tiresome reason:
906 -- we want to make sure that the bindings for data
907 -- constructors are eta-expanded. This is probably
908 -- a good thing anyway, but it seems fragile.
911 -- -----------------------------------------------------------------------------
912 -- Standard sets of warning options
914 standardWarnings :: [DynFlag]
916 = [ Opt_WarnWarningsDeprecations,
917 Opt_WarnDeprecatedFlags,
918 Opt_WarnUnrecognisedPragmas,
919 Opt_WarnOverlappingPatterns,
920 Opt_WarnMissingFields,
921 Opt_WarnMissingMethods,
922 Opt_WarnDuplicateExports,
923 Opt_WarnLazyUnliftedBindings,
924 Opt_WarnDodgyForeignImports,
928 minusWOpts :: [DynFlag]
930 = standardWarnings ++
931 [ Opt_WarnUnusedBinds,
932 Opt_WarnUnusedMatches,
933 Opt_WarnUnusedImports,
934 Opt_WarnIncompletePatterns,
935 Opt_WarnDodgyExports,
939 minusWallOpts :: [DynFlag]
942 [ Opt_WarnTypeDefaults,
943 Opt_WarnNameShadowing,
950 -- minuswRemovesOpts should be every warning option
951 minuswRemovesOpts :: [DynFlag]
954 [Opt_WarnImplicitPrelude,
955 Opt_WarnIncompletePatternsRecUpd,
956 Opt_WarnSimplePatterns,
957 Opt_WarnMonomorphism,
958 Opt_WarnUnrecognisedPragmas,
962 -- -----------------------------------------------------------------------------
963 -- CoreToDo: abstraction of core-to-core passes to run.
965 data CoreToDo -- These are diff core-to-core passes,
966 -- which may be invoked in any order,
967 -- as many times as you like.
969 = CoreDoSimplify -- The core-to-core simplifier.
972 -- Each run of the simplifier can take a different
973 -- set of simplifier-specific flags.
975 | CoreDoFloatOutwards FloatOutSwitches
980 | CoreDoWorkerWrapper
983 | CoreDoOldStrictness
986 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
987 -- matching this string
988 | CoreDoVectorisation PackageId
989 | CoreDoNothing -- Useful when building up
990 | CoreDoPasses [CoreToDo] -- lists of these things
993 data SimplifierMode -- See comments in SimplMonad
995 | SimplPhase Int [String]
997 instance Outputable SimplifierMode where
998 ppr SimplGently = ptext (sLit "gentle")
999 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
1002 data SimplifierSwitch
1003 = MaxSimplifierIterations Int
1007 data FloatOutSwitches = FloatOutSwitches {
1008 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
1009 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
1010 -- even if they do not escape a lambda
1013 instance Outputable FloatOutSwitches where
1014 ppr = pprFloatOutSwitches
1016 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1017 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1018 <+> pp_not (floatOutConstants sw) <+> text "constants"
1021 pp_not False = text "not"
1023 -- | Switches that specify the minimum amount of floating out
1024 -- gentleFloatOutSwitches :: FloatOutSwitches
1025 -- gentleFloatOutSwitches = FloatOutSwitches False False
1027 -- | Switches that do not specify floating out of lambdas, just of constants
1028 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1029 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1032 -- The core-to-core pass ordering is derived from the DynFlags:
1033 runWhen :: Bool -> CoreToDo -> CoreToDo
1034 runWhen True do_this = do_this
1035 runWhen False _ = CoreDoNothing
1037 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1038 runMaybe (Just x) f = f x
1039 runMaybe Nothing _ = CoreDoNothing
1041 getCoreToDo :: DynFlags -> [CoreToDo]
1043 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1044 | otherwise = core_todo
1046 opt_level = optLevel dflags
1047 phases = simplPhases dflags
1048 max_iter = maxSimplIterations dflags
1049 strictness = dopt Opt_Strictness dflags
1050 full_laziness = dopt Opt_FullLaziness dflags
1051 cse = dopt Opt_CSE dflags
1052 spec_constr = dopt Opt_SpecConstr dflags
1053 liberate_case = dopt Opt_LiberateCase dflags
1054 rule_check = ruleCheck dflags
1055 static_args = dopt Opt_StaticArgumentTransformation dflags
1057 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1059 simpl_phase phase names iter
1061 [ CoreDoSimplify (SimplPhase phase names) [
1062 MaxSimplifierIterations iter
1064 maybe_rule_check phase
1068 = runWhen (dopt Opt_Vectorise dflags)
1069 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1072 -- By default, we have 2 phases before phase 0.
1074 -- Want to run with inline phase 2 after the specialiser to give
1075 -- maximum chance for fusion to work before we inline build/augment
1076 -- in phase 1. This made a difference in 'ansi' where an
1077 -- overloaded function wasn't inlined till too late.
1079 -- Need phase 1 so that build/augment get
1080 -- inlined. I found that spectral/hartel/genfft lost some useful
1081 -- strictness in the function sumcode' if augment is not inlined
1082 -- before strictness analysis runs
1083 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1084 | phase <- [phases, phases-1 .. 1] ]
1087 -- initial simplify: mk specialiser happy: minimum effort please
1088 simpl_gently = CoreDoSimplify SimplGently [
1089 -- Simplify "gently"
1090 -- Don't inline anything till full laziness has bitten
1091 -- In particular, inlining wrappers inhibits floating
1092 -- e.g. ...(case f x of ...)...
1093 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1094 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1095 -- and now the redex (f x) isn't floatable any more
1096 -- Similarly, don't apply any rules until after full
1097 -- laziness. Notably, list fusion can prevent floating.
1099 NoCaseOfCase, -- Don't do case-of-case transformations.
1100 -- This makes full laziness work better
1101 MaxSimplifierIterations max_iter
1105 if opt_level == 0 then
1107 simpl_phase 0 ["final"] max_iter]
1108 else {- opt_level >= 1 -} [
1110 -- We want to do the static argument transform before full laziness as it
1111 -- may expose extra opportunities to float things outwards. However, to fix
1112 -- up the output of the transformation we need at do at least one simplify
1113 -- after this before anything else
1114 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1116 -- We run vectorisation here for now, but we might also try to run
1120 -- initial simplify: mk specialiser happy: minimum effort please
1123 -- Specialisation is best done before full laziness
1124 -- so that overloaded functions have all their dictionary lambdas manifest
1127 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1128 -- Was: gentleFloatOutSwitches
1129 -- I have no idea why, but not floating constants to top level is
1130 -- very bad in some cases.
1131 -- Notably: p_ident in spectral/rewrite
1132 -- Changing from "gentle" to "constantsOnly" improved
1133 -- rewrite's allocation by 19%, and made 0.0% difference
1134 -- to any other nofib benchmark
1140 -- Phase 0: allow all Ids to be inlined now
1141 -- This gets foldr inlined before strictness analysis
1143 -- At least 3 iterations because otherwise we land up with
1144 -- huge dead expressions because of an infelicity in the
1146 -- let k = BIG in foldr k z xs
1147 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1148 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1150 simpl_phase 0 ["main"] (max max_iter 3),
1153 #ifdef OLD_STRICTNESS
1154 CoreDoOldStrictness,
1156 runWhen strictness (CoreDoPasses [
1158 CoreDoWorkerWrapper,
1160 simpl_phase 0 ["post-worker-wrapper"] max_iter
1163 runWhen full_laziness
1164 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1165 -- nofib/spectral/hartel/wang doubles in speed if you
1166 -- do full laziness late in the day. It only happens
1167 -- after fusion and other stuff, so the early pass doesn't
1168 -- catch it. For the record, the redex is
1169 -- f_el22 (f_el21 r_midblock)
1172 runWhen cse CoreCSE,
1173 -- We want CSE to follow the final full-laziness pass, because it may
1174 -- succeed in commoning up things floated out by full laziness.
1175 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1181 -- Case-liberation for -O2. This should be after
1182 -- strictness analysis and the simplification which follows it.
1183 runWhen liberate_case (CoreDoPasses [
1185 simpl_phase 0 ["post-liberate-case"] max_iter
1186 ]), -- Run the simplifier after LiberateCase to vastly
1187 -- reduce the possiblility of shadowing
1188 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1190 runWhen spec_constr CoreDoSpecConstr,
1194 -- Final clean-up simplification:
1195 simpl_phase 0 ["final"] max_iter
1198 -- -----------------------------------------------------------------------------
1199 -- StgToDo: abstraction of stg-to-stg passes to run.
1202 = StgDoMassageForProfiling -- should be (next to) last
1203 -- There's also setStgVarInfo, but its absolute "lastness"
1204 -- is so critical that it is hardwired in (no flag).
1207 getStgToDo :: DynFlags -> [StgToDo]
1209 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1212 stg_stats = dopt Opt_StgStats dflags
1214 todo1 = if stg_stats then [D_stg_stats] else []
1216 todo2 | WayProf `elem` wayNames dflags
1217 = StgDoMassageForProfiling : todo1
1221 -- -----------------------------------------------------------------------------
1224 allFlags :: [String]
1225 allFlags = map ('-':) $
1226 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1227 map ("fno-"++) flags ++
1228 map ("f"++) flags ++
1229 map ("X"++) supportedLanguages ++
1230 map ("XNo"++) supportedLanguages
1231 where ok (PrefixPred _ _) = False
1233 flags = [ name | (name, _, _) <- fFlags ]
1235 dynamic_flags :: [Flag DynP]
1237 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1238 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1239 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1240 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1241 , Flag "v" (OptIntSuffix setVerbosity) Supported
1243 ------- Specific phases --------------------------------------------
1244 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1245 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1246 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1247 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1248 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1249 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1250 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1251 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1252 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1253 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1255 , Flag "optL" (HasArg (upd . addOptL)) Supported
1256 , Flag "optP" (HasArg (upd . addOptP)) Supported
1257 , Flag "optF" (HasArg (upd . addOptF)) Supported
1258 , Flag "optc" (HasArg (upd . addOptc)) Supported
1259 , Flag "optm" (HasArg (upd . addOptm)) Supported
1260 , Flag "opta" (HasArg (upd . addOpta)) Supported
1261 , Flag "optl" (HasArg (upd . addOptl)) Supported
1262 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1265 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1268 -------- ghc -M -----------------------------------------------------
1269 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1270 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1271 (Deprecated "Use -dep-suffix instead")
1272 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1273 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1274 (Deprecated "Use -dep-makefile instead")
1275 , Flag "optdep-w" (NoArg (return ()))
1276 (Deprecated "-optdep-w doesn't do anything")
1277 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1278 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1279 (Deprecated "Use -include-pkg-deps instead")
1280 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1281 (Deprecated "Use -include-pkg-deps instead")
1282 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1283 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1284 (Deprecated "Use -exclude-module instead")
1285 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1286 (Deprecated "Use -exclude-module instead")
1288 -------- Linking ----------------------------------------------------
1289 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1291 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1292 (Deprecated "Use -c instead")
1293 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1295 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1298 ------- Libraries ---------------------------------------------------
1299 , Flag "L" (Prefix addLibraryPath ) Supported
1300 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1302 ------- Frameworks --------------------------------------------------
1303 -- -framework-path should really be -F ...
1304 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1305 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1307 ------- Output Redirection ------------------------------------------
1308 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1309 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1310 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1311 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1312 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1313 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1314 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1315 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1316 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1317 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1318 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1321 ------- Keeping temporary files -------------------------------------
1322 -- These can be singular (think ghc -c) or plural (think ghc --make)
1323 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1324 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1325 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1326 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1327 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1328 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1329 -- This only makes sense as plural
1330 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1332 ------- Miscellaneous ----------------------------------------------
1333 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1334 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1335 , Flag "main-is" (SepArg setMainIs ) Supported
1336 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1337 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1338 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1340 ------- recompilation checker --------------------------------------
1341 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1342 (Deprecated "Use -fno-force-recomp instead")
1343 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1344 (Deprecated "Use -fforce-recomp instead")
1346 ------ HsCpp opts ---------------------------------------------------
1347 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1348 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1350 ------- Include/Import Paths ----------------------------------------
1351 , Flag "I" (Prefix addIncludePath) Supported
1352 , Flag "i" (OptPrefix addImportPath ) Supported
1354 ------ Debugging ----------------------------------------------------
1355 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1357 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1359 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1361 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1363 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1365 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1367 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1369 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1371 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1373 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1375 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1377 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1379 , Flag "ddump-asm-regalloc-stages"
1380 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1382 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1384 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1386 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1388 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1390 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1392 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1394 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1396 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1398 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1400 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1402 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1404 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1406 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1408 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1410 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1412 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1414 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1416 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1418 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1420 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1422 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1424 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1426 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1428 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1430 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1432 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1434 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1436 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1438 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1440 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1442 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1444 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1446 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1448 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1450 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1452 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1454 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1456 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1458 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1460 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1462 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1464 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1466 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1468 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1471 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1473 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1475 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1477 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1479 , Flag "dshow-passes"
1480 (NoArg (do forceRecompile
1481 setVerbosity (Just 2)))
1483 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1486 ------ Machine dependant (-m<blah>) stuff ---------------------------
1488 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1490 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1492 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1495 ------ Warning opts -------------------------------------------------
1496 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1498 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1500 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1502 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1504 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1505 (Deprecated "Use -w instead")
1506 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1509 ------ Optimisation flags ------------------------------------------
1510 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1511 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1512 (Deprecated "Use -O0 instead")
1513 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1514 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1516 -- If the number is missing, use 1
1518 , Flag "fsimplifier-phases"
1519 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1521 , Flag "fmax-simplifier-iterations"
1522 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1525 , Flag "fspec-constr-threshold"
1526 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1528 , Flag "fno-spec-constr-threshold"
1529 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1531 , Flag "fspec-constr-count"
1532 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1534 , Flag "fno-spec-constr-count"
1535 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1537 , Flag "fliberate-case-threshold"
1538 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1540 , Flag "fno-liberate-case-threshold"
1541 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1544 , Flag "frule-check"
1545 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1547 , Flag "fcontext-stack"
1548 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1551 ------ Profiling ----------------------------------------------------
1553 -- XXX Should the -f* flags be deprecated?
1554 -- They don't seem to be documented
1555 , Flag "fauto-sccs-on-all-toplevs"
1556 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1559 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1561 , Flag "no-auto-all"
1562 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1564 , Flag "fauto-sccs-on-exported-toplevs"
1565 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1568 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1571 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1573 , Flag "fauto-sccs-on-individual-cafs"
1574 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1577 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1580 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1583 ------ DPH flags ----------------------------------------------------
1586 (NoArg (setDPHBackend DPHSeq))
1589 (NoArg (setDPHBackend DPHPar))
1592 (NoArg (setDPHBackend DPHThis))
1595 ------ Compiler flags -----------------------------------------------
1597 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1598 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1599 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1601 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1602 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1603 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1605 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1607 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1610 ++ map (mkFlag True "f" setDynFlag ) fFlags
1611 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1612 ++ map (mkFlag True "X" setDynFlag ) xFlags
1613 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1615 package_flags :: [Flag DynP]
1617 ------- Packages ----------------------------------------------------
1618 Flag "package-conf" (HasArg extraPkgConf_) Supported
1619 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1621 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1622 , Flag "package" (HasArg exposePackage) Supported
1623 , Flag "hide-package" (HasArg hidePackage) Supported
1624 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1626 , Flag "ignore-package" (HasArg ignorePackage)
1628 , Flag "syslib" (HasArg exposePackage)
1629 (Deprecated "Use -package instead")
1632 mkFlag :: Bool -- ^ True <=> it should be turned on
1633 -> String -- ^ The flag prefix
1634 -> (DynFlag -> DynP ())
1635 -> (String, DynFlag, Bool -> Deprecated)
1637 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1638 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1640 deprecatedForLanguage :: String -> Bool -> Deprecated
1641 deprecatedForLanguage lang turn_on
1642 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1644 flag | turn_on = lang
1645 | otherwise = "No"++lang
1647 useInstead :: String -> Bool -> Deprecated
1648 useInstead flag turn_on
1649 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1651 no = if turn_on then "" else "no-"
1653 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1654 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1656 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1657 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1658 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1659 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1660 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1661 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1662 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1663 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1664 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1665 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1666 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1667 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1668 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1669 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1670 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1671 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1672 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1673 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1674 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1675 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1676 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1677 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1678 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1679 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1680 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1681 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1682 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1683 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1684 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1685 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1686 ( "strictness", Opt_Strictness, const Supported ),
1687 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1688 ( "full-laziness", Opt_FullLaziness, const Supported ),
1689 ( "liberate-case", Opt_LiberateCase, const Supported ),
1690 ( "spec-constr", Opt_SpecConstr, const Supported ),
1691 ( "cse", Opt_CSE, const Supported ),
1692 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1693 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1694 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1695 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1696 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1697 ( "case-merge", Opt_CaseMerge, const Supported ),
1698 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1699 ( "method-sharing", Opt_MethodSharing, const Supported ),
1700 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1701 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1702 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1703 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1704 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1705 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1706 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1707 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1708 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1709 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1710 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1711 ( "break-on-error", Opt_BreakOnError, const Supported ),
1712 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1713 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1714 ( "run-cps", Opt_RunCPS, const Supported ),
1715 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1716 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1717 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1718 ( "vectorise", Opt_Vectorise, const Supported ),
1719 ( "regs-graph", Opt_RegsGraph, const Supported ),
1720 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1721 ( "th", Opt_TemplateHaskell,
1722 deprecatedForLanguage "TemplateHaskell" ),
1723 ( "fi", Opt_ForeignFunctionInterface,
1724 deprecatedForLanguage "ForeignFunctionInterface" ),
1725 ( "ffi", Opt_ForeignFunctionInterface,
1726 deprecatedForLanguage "ForeignFunctionInterface" ),
1727 ( "arrows", Opt_Arrows,
1728 deprecatedForLanguage "Arrows" ),
1729 ( "generics", Opt_Generics,
1730 deprecatedForLanguage "Generics" ),
1731 ( "implicit-prelude", Opt_ImplicitPrelude,
1732 deprecatedForLanguage "ImplicitPrelude" ),
1733 ( "bang-patterns", Opt_BangPatterns,
1734 deprecatedForLanguage "BangPatterns" ),
1735 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1736 deprecatedForLanguage "MonomorphismRestriction" ),
1737 ( "mono-pat-binds", Opt_MonoPatBinds,
1738 deprecatedForLanguage "MonoPatBinds" ),
1739 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1740 deprecatedForLanguage "ExtendedDefaultRules" ),
1741 ( "implicit-params", Opt_ImplicitParams,
1742 deprecatedForLanguage "ImplicitParams" ),
1743 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1744 deprecatedForLanguage "ScopedTypeVariables" ),
1746 deprecatedForLanguage "PArr" ),
1747 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1748 deprecatedForLanguage "OverlappingInstances" ),
1749 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1750 deprecatedForLanguage "UndecidableInstances" ),
1751 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1752 deprecatedForLanguage "IncoherentInstances" ),
1753 ( "gen-manifest", Opt_GenManifest, const Supported ),
1754 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1755 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1756 ( "shared-implib", Opt_SharedImplib, const Supported ),
1757 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1760 supportedLanguages :: [String]
1761 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1763 -- This may contain duplicates
1764 languageOptions :: [DynFlag]
1765 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1767 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1768 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1770 ( "CPP", Opt_Cpp, const Supported ),
1771 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1772 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1773 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1774 ( "MagicHash", Opt_MagicHash, const Supported ),
1775 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1776 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1777 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1778 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1779 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1780 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1781 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1782 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1783 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1784 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1785 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1786 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1787 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1788 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1789 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1790 ( "Arrows", Opt_Arrows, const Supported ),
1791 ( "PArr", Opt_PArr, const Supported ),
1792 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1793 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1794 ( "Generics", Opt_Generics, const Supported ),
1796 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1797 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1798 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1799 ( "RecordPuns", Opt_RecordPuns,
1800 deprecatedForLanguage "NamedFieldPuns" ),
1801 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1802 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1803 ( "GADTs", Opt_GADTs, const Supported ),
1804 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1805 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1806 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1808 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1809 -- On by default (which is not strictly H98):
1810 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1811 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1812 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1813 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1814 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1815 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1817 ( "PatternSignatures", Opt_ScopedTypeVariables,
1818 deprecatedForLanguage "ScopedTypeVariables" ),
1820 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1821 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1822 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1823 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1824 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1825 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1826 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1827 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1828 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1829 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1830 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1831 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1832 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1833 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1834 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1835 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1836 ( "PackageImports", Opt_PackageImports, const Supported ),
1837 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1840 impliedFlags :: [(DynFlag, DynFlag)]
1842 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1843 -- be completely rigid for GADTs
1845 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1846 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1847 -- all over the place
1849 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1850 -- Note [Scoped tyvars] in TcBinds
1851 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1854 glasgowExtsFlags :: [DynFlag]
1855 glasgowExtsFlags = [
1856 Opt_PrintExplicitForalls
1857 , Opt_ForeignFunctionInterface
1858 , Opt_UnliftedFFITypes
1860 , Opt_ImplicitParams
1861 , Opt_ScopedTypeVariables
1863 , Opt_TypeSynonymInstances
1864 , Opt_StandaloneDeriving
1865 , Opt_DeriveDataTypeable
1867 , Opt_DeriveFoldable
1868 , Opt_DeriveTraversable
1869 , Opt_FlexibleContexts
1870 , Opt_FlexibleInstances
1871 , Opt_ConstrainedClassMethods
1872 , Opt_MultiParamTypeClasses
1873 , Opt_FunctionalDependencies
1875 , Opt_PolymorphicComponents
1876 , Opt_ExistentialQuantification
1878 , Opt_PostfixOperators
1880 , Opt_LiberalTypeSynonyms
1884 , Opt_ParallelListComp
1885 , Opt_EmptyDataDecls
1886 , Opt_KindSignatures
1887 , Opt_GeneralizedNewtypeDeriving
1888 , Opt_TypeFamilies ]
1890 -- -----------------------------------------------------------------------------
1891 -- Parsing the dynamic flags.
1893 -- | Parse dynamic flags from a list of command line arguments. Returns the
1894 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1895 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1896 -- flags or missing arguments).
1897 parseDynamicFlags :: Monad m =>
1898 DynFlags -> [Located String]
1899 -> m (DynFlags, [Located String], [Located String])
1900 -- ^ Updated 'DynFlags', left-over arguments, and
1901 -- list of warnings.
1902 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1904 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1905 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1906 parseDynamicNoPackageFlags :: Monad m =>
1907 DynFlags -> [Located String]
1908 -> m (DynFlags, [Located String], [Located String])
1909 -- ^ Updated 'DynFlags', left-over arguments, and
1910 -- list of warnings.
1911 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1913 parseDynamicFlags_ :: Monad m =>
1914 DynFlags -> [Located String] -> Bool
1915 -> m (DynFlags, [Located String], [Located String])
1916 parseDynamicFlags_ dflags args pkg_flags = do
1917 -- XXX Legacy support code
1918 -- We used to accept things like
1919 -- optdep-f -optdepdepend
1920 -- optdep-f -optdep depend
1921 -- optdep -f -optdepdepend
1922 -- optdep -f -optdep depend
1923 -- but the spaces trip up proper argument handling. So get rid of them.
1924 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1925 f (x : xs) = x : f xs
1929 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1930 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1931 | otherwise = dynamic_flags
1933 let ((leftover, errs, warns), dflags')
1934 = runCmdLine (processArgs flag_spec args') dflags
1935 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1936 return (dflags', leftover, warns)
1938 type DynP = CmdLineP DynFlags
1940 upd :: (DynFlags -> DynFlags) -> DynP ()
1942 dfs <- getCmdLineState
1943 putCmdLineState $! (f dfs)
1945 --------------------------
1946 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1947 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1948 ; mapM_ setDynFlag deps }
1950 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1951 -- When you set f, set the ones it implies
1952 -- NB: use setDynFlag recursively, in case the implied flags
1953 -- implies further flags
1954 -- When you un-set f, however, we don't un-set the things it implies
1955 -- (except for -fno-glasgow-exts, which is treated specially)
1957 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1959 --------------------------
1960 setDumpFlag :: DynFlag -> OptKind DynP
1961 setDumpFlag dump_flag
1962 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1964 -- Certain dumpy-things are really interested in what's going
1965 -- on during recompilation checking, so in those cases we
1966 -- don't want to turn it off.
1967 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1968 Opt_D_dump_hi_diffs]
1970 forceRecompile :: DynP ()
1971 -- Whenver we -ddump, force recompilation (by switching off the
1972 -- recompilation checker), else you don't see the dump! However,
1973 -- don't switch it off in --make mode, else *everything* gets
1974 -- recompiled which probably isn't what you want
1975 forceRecompile = do { dfs <- getCmdLineState
1976 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1978 force_recomp dfs = isOneShot (ghcMode dfs)
1980 setVerboseCore2Core :: DynP ()
1981 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1983 upd (\s -> s { shouldDumpSimplPhase = const True })
1985 setDumpSimplPhases :: String -> DynP ()
1986 setDumpSimplPhases s = do forceRecompile
1987 upd (\s -> s { shouldDumpSimplPhase = spec })
1989 spec :: SimplifierMode -> Bool
1991 . map (join (&&) . map match . split ':')
1997 join :: (Bool -> Bool -> Bool)
1998 -> [SimplifierMode -> Bool]
1999 -> SimplifierMode -> Bool
2000 join _ [] = const True
2001 join op ss = foldr1 (\f g x -> f x `op` g x) ss
2003 match :: String -> SimplifierMode -> Bool
2004 match "" = const True
2005 match s = case reads s of
2006 [(n,"")] -> phase_num n
2009 phase_num :: Int -> SimplifierMode -> Bool
2010 phase_num n (SimplPhase k _) = n == k
2011 phase_num _ _ = False
2013 phase_name :: String -> SimplifierMode -> Bool
2014 phase_name s SimplGently = s == "gentle"
2015 phase_name s (SimplPhase _ ss) = s `elem` ss
2017 setVerbosity :: Maybe Int -> DynP ()
2018 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2020 addCmdlineHCInclude :: String -> DynP ()
2021 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2023 extraPkgConf_ :: FilePath -> DynP ()
2024 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2026 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2028 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2030 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2032 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2034 setPackageName :: String -> DynFlags -> DynFlags
2036 | Nothing <- unpackPackageId pid
2037 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2039 = \s -> s{ thisPackage = pid }
2041 pid = stringToPackageId p
2043 -- If we're linking a binary, then only targets that produce object
2044 -- code are allowed (requests for other target types are ignored).
2045 setTarget :: HscTarget -> DynP ()
2046 setTarget l = upd set
2049 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2052 -- Changes the target only if we're compiling object code. This is
2053 -- used by -fasm and -fvia-C, which switch from one to the other, but
2054 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2055 -- can be safely used in an OPTIONS_GHC pragma.
2056 setObjTarget :: HscTarget -> DynP ()
2057 setObjTarget l = upd set
2060 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2063 setOptLevel :: Int -> DynFlags -> DynFlags
2064 setOptLevel n dflags
2065 | hscTarget dflags == HscInterpreted && n > 0
2067 -- not in IO any more, oh well:
2068 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2070 = updOptLevel n dflags
2073 -- -Odph is equivalent to
2075 -- -O2 optimise as much as possible
2076 -- -fno-method-sharing sharing specialisation defeats fusion
2078 -- -fdicts-cheap always inline dictionaries
2079 -- -fmax-simplifier-iterations20 this is necessary sometimes
2080 -- -fsimplifier-phases=3 we use an additional simplifier phase
2082 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2083 -- -fno-spec-constr-count SpecConstr as much as possible
2084 -- -finline-enough-args hack to prevent excessive inlining
2086 setDPHOpt :: DynFlags -> DynFlags
2087 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2089 , specConstrThreshold = Nothing
2090 , specConstrCount = Nothing
2092 `dopt_set` Opt_DictsCheap
2093 `dopt_unset` Opt_MethodSharing
2094 `dopt_set` Opt_InlineIfEnoughArgs
2096 data DPHBackend = DPHPar
2099 deriving(Eq, Ord, Enum, Show)
2101 setDPHBackend :: DPHBackend -> DynP ()
2102 setDPHBackend backend
2104 upd $ \dflags -> dflags { dphBackend = backend }
2105 mapM_ exposePackage (dph_packages backend)
2107 dph_packages DPHThis = []
2108 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2109 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2111 dphPackage :: DynFlags -> PackageId
2112 dphPackage dflags = case dphBackend dflags of
2113 DPHPar -> dphParPackageId
2114 DPHSeq -> dphSeqPackageId
2115 DPHThis -> thisPackage dflags
2117 setMainIs :: String -> DynP ()
2119 | not (null main_fn) && isLower (head main_fn)
2120 -- The arg looked like "Foo.Bar.baz"
2121 = upd $ \d -> d{ mainFunIs = Just main_fn,
2122 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2124 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2125 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2127 | otherwise -- The arg looked like "baz"
2128 = upd $ \d -> d{ mainFunIs = Just arg }
2130 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2132 -----------------------------------------------------------------------------
2133 -- Paths & Libraries
2135 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2137 -- -i on its own deletes the import paths
2138 addImportPath "" = upd (\s -> s{importPaths = []})
2139 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2143 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2146 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2148 addFrameworkPath p =
2149 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2151 #ifndef mingw32_TARGET_OS
2152 split_marker :: Char
2153 split_marker = ':' -- not configurable (ToDo)
2156 splitPathList :: String -> [String]
2157 splitPathList s = filter notNull (splitUp s)
2158 -- empty paths are ignored: there might be a trailing
2159 -- ':' in the initial list, for example. Empty paths can
2160 -- cause confusion when they are translated into -I options
2161 -- for passing to gcc.
2163 #ifndef mingw32_TARGET_OS
2164 splitUp xs = split split_marker xs
2166 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2168 -- That is, if "foo:bar:baz" is used, this interpreted as
2169 -- consisting of three entries, 'foo', 'bar', 'baz'.
2170 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2171 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2173 -- Notice that no attempt is made to fully replace the 'standard'
2174 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2175 -- that this will cause too much breakage for users & ':' will
2176 -- work fine even with DOS paths, if you're not insisting on being silly.
2179 splitUp (x:':':div:xs) | div `elem` dir_markers
2180 = ((x:':':div:p): splitUp rs)
2182 (p,rs) = findNextPath xs
2183 -- we used to check for existence of the path here, but that
2184 -- required the IO monad to be threaded through the command-line
2185 -- parser which is quite inconvenient. The
2186 splitUp xs = cons p (splitUp rs)
2188 (p,rs) = findNextPath xs
2193 -- will be called either when we've consumed nought or the
2194 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2195 -- finding the next split marker.
2197 case break (`elem` split_markers) xs of
2198 (p, _:ds) -> (p, ds)
2201 split_markers :: [Char]
2202 split_markers = [':', ';']
2204 dir_markers :: [Char]
2205 dir_markers = ['/', '\\']
2208 -- -----------------------------------------------------------------------------
2209 -- tmpDir, where we store temporary files.
2211 setTmpDir :: FilePath -> DynFlags -> DynFlags
2212 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2213 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2214 -- seem necessary now --SDM 7/2/2008
2216 -----------------------------------------------------------------------------
2219 setOptHpcDir :: String -> DynP ()
2220 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2222 -----------------------------------------------------------------------------
2223 -- Via-C compilation stuff
2225 -- There are some options that we need to pass to gcc when compiling
2226 -- Haskell code via C, but are only supported by recent versions of
2227 -- gcc. The configure script decides which of these options we need,
2228 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2229 -- read before each via-C compilation. The advantage of having these
2230 -- in a separate file is that the file can be created at install-time
2231 -- depending on the available gcc version, and even re-generated later
2232 -- if gcc is upgraded.
2234 -- The options below are not dependent on the version of gcc, only the
2237 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2238 [String]) -- for registerised HC compilations
2239 machdepCCOpts _dflags
2240 #if alpha_TARGET_ARCH
2242 #ifdef HAVE_THREADED_RTS_SUPPORT
2246 -- For now, to suppress the gcc warning "call-clobbered
2247 -- register used for global register variable", we simply
2248 -- disable all warnings altogether using the -w flag. Oh well.
2250 #elif hppa_TARGET_ARCH
2251 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2252 -- (very nice, but too bad the HP /usr/include files don't agree.)
2253 = ( ["-D_HPUX_SOURCE"], [] )
2255 #elif m68k_TARGET_ARCH
2256 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2257 -- popping of args to routines to be explicit; if we let things
2258 -- be deferred 'til after an STGJUMP, imminent death is certain!
2260 -- -fomit-frame-pointer : *don't*
2261 -- It's better to have a6 completely tied up being a frame pointer
2262 -- rather than let GCC pick random things to do with it.
2263 -- (If we want to steal a6, then we would try to do things
2264 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2265 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2267 #elif i386_TARGET_ARCH
2268 -- -fno-defer-pop : basically the same game as for m68k
2270 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2271 -- the fp (%ebp) for our register maps.
2272 = let n_regs = stolen_x86_regs _dflags
2275 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2278 "-fomit-frame-pointer",
2279 -- we want -fno-builtin, because when gcc inlines
2280 -- built-in functions like memcpy() it tends to
2281 -- run out of registers, requiring -monly-n-regs
2283 "-DSTOLEN_X86_REGS="++show n_regs ]
2286 #elif ia64_TARGET_ARCH
2287 = ( [], ["-fomit-frame-pointer", "-G0"] )
2289 #elif x86_64_TARGET_ARCH
2291 #if darwin_TARGET_OS
2296 ["-fomit-frame-pointer",
2297 "-fno-asynchronous-unwind-tables",
2298 -- the unwind tables are unnecessary for HC code,
2299 -- and get in the way of -split-objs. Another option
2300 -- would be to throw them away in the mangler, but this
2303 -- calling builtins like strlen() using the FFI can
2304 -- cause gcc to run out of regs, so use the external
2308 #elif sparc_TARGET_ARCH
2310 -- For now, to suppress the gcc warning "call-clobbered
2311 -- register used for global register variable", we simply
2312 -- disable all warnings altogether using the -w flag. Oh well.
2314 #elif powerpc_apple_darwin_TARGET
2316 -- Disable Apple's precompiling preprocessor. It's a great thing
2317 -- for "normal" programs, but it doesn't support register variable
2319 = ( [], ["-no-cpp-precomp"] )
2324 picCCOpts :: DynFlags -> [String]
2326 #if darwin_TARGET_OS
2327 -- Apple prefers to do things the other way round.
2328 -- PIC is on by default.
2329 -- -mdynamic-no-pic:
2330 -- Turn off PIC code generation.
2332 -- Don't generate "common" symbols - these are unwanted
2333 -- in dynamic libraries.
2336 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2338 = ["-mdynamic-no-pic"]
2339 #elif mingw32_TARGET_OS
2340 -- no -fPIC for Windows
2342 = ["-U __PIC__","-D__PIC__"]
2346 | opt_PIC || not opt_Static
2347 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2352 -- -----------------------------------------------------------------------------
2356 can_split = cSplitObjs == "YES"
2358 -- -----------------------------------------------------------------------------
2361 data Printable = String String
2362 | FromDynFlags (DynFlags -> String)
2364 compilerInfo :: [(String, Printable)]
2365 compilerInfo = [("Project name", String cProjectName),
2366 ("Project version", String cProjectVersion),
2367 ("Booter version", String cBooterVersion),
2368 ("Stage", String cStage),
2369 ("Have interpreter", String cGhcWithInterpreter),
2370 ("Object splitting", String cSplitObjs),
2371 ("Have native code generator", String cGhcWithNativeCodeGen),
2372 ("Support SMP", String cGhcWithSMP),
2373 ("Unregisterised", String cGhcUnregisterised),
2374 ("Tables next to code", String cGhcEnableTablesNextToCode),
2375 ("Win32 DLLs", String cEnableWin32DLLs),
2376 ("RTS ways", String cGhcRTSWays),
2377 ("Leading underscore", String cLeadingUnderscore),
2378 ("Debug on", String (show debugIsOn)),
2379 ("LibDir", FromDynFlags topDir)