6 -- (c) The University of Glasgow 2005
9 -- Most flags are dynamic flags, which means they can change from
10 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
11 -- multi-session GHC each session can be using different dynamic
12 -- flags. Dynamic flags can also be set at the prompt in GHCi.
14 -- * Dynamic flags and associated configuration types
17 HscTarget(..), isObjectTarget, defaultObjectTarget,
18 GhcMode(..), isOneShot,
19 GhcLink(..), isNoLink,
26 -- ** Manipulating DynFlags
27 defaultDynFlags, -- DynFlags
28 initDynFlags, -- DynFlags -> IO DynFlags
30 dopt, -- DynFlag -> DynFlags -> Bool
31 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
32 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
40 -- ** Parsing DynFlags
42 parseDynamicNoPackageFlags,
45 supportedLanguages, languageOptions,
47 -- ** DynFlag C compiler options
48 machdepCCOpts, picCCOpts,
50 -- * Configuration of the core-to-core passes
57 -- * Configuration of the stg-to-stg passes
61 -- * Compiler configuration suitable for display to the user
65 #include "HsVersions.h"
67 #ifndef OMIT_NATIVE_CODEGEN
72 import PrelNames ( mAIN, main_RDR_Unqual )
73 import RdrName ( RdrName, mkRdrUnqual )
74 import OccName ( mkVarOccFS )
75 #if defined(i386_TARGET_ARCH) || (!defined(mingw32_TARGET_OS) && !defined(darwin_TARGET_OS))
76 import StaticFlags ( opt_Static )
78 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
80 import {-# SOURCE #-} Packages (PackageState)
81 import DriverPhases ( Phase(..), phaseInputExt )
84 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
86 import UniqFM ( UniqFM )
88 import Maybes ( orElse )
93 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
96 import Control.Monad ( when )
99 import Data.List ( intersperse )
100 import System.FilePath
101 import System.IO ( stderr, hPutChar )
103 -- -----------------------------------------------------------------------------
106 -- | Enumerates the simple on-or-off dynamic flags
112 | Opt_D_dump_cmmz_pretty
116 | Opt_D_dump_asm_native
117 | Opt_D_dump_asm_liveness
118 | Opt_D_dump_asm_coalesce
119 | Opt_D_dump_asm_regalloc
120 | Opt_D_dump_asm_regalloc_stages
121 | Opt_D_dump_asm_conflicts
122 | Opt_D_dump_asm_stats
123 | Opt_D_dump_asm_expanded
129 | Opt_D_dump_inlinings
130 | Opt_D_dump_rule_firings
131 | Opt_D_dump_occur_anal
135 | Opt_D_dump_simpl_iterations
136 | Opt_D_dump_simpl_phases
145 | Opt_D_dump_worker_wrapper
146 | Opt_D_dump_rn_trace
147 | Opt_D_dump_rn_stats
149 | Opt_D_dump_simpl_stats
150 | Opt_D_dump_tc_trace
151 | Opt_D_dump_if_trace
158 | Opt_D_verbose_core2core
159 | Opt_D_verbose_stg2stg
161 | Opt_D_dump_hi_diffs
162 | Opt_D_dump_minimal_imports
163 | Opt_D_dump_mod_cycles
164 | Opt_D_dump_view_pattern_commoning
165 | Opt_D_faststring_stats
166 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
167 | Opt_D_no_debug_output
173 | Opt_WarnIsError -- -Werror; makes warnings fatal
174 | Opt_WarnDuplicateExports
176 | Opt_WarnImplicitPrelude
177 | Opt_WarnIncompletePatterns
178 | Opt_WarnIncompletePatternsRecUpd
179 | Opt_WarnMissingFields
180 | Opt_WarnMissingMethods
181 | Opt_WarnMissingSigs
182 | Opt_WarnNameShadowing
183 | Opt_WarnOverlappingPatterns
184 | Opt_WarnSimplePatterns
185 | Opt_WarnTypeDefaults
186 | Opt_WarnMonomorphism
187 | Opt_WarnUnusedBinds
188 | Opt_WarnUnusedImports
189 | Opt_WarnUnusedMatches
190 | Opt_WarnWarningsDeprecations
191 | Opt_WarnDeprecatedFlags
192 | Opt_WarnDodgyImports
195 | Opt_WarnUnrecognisedPragmas
196 | Opt_WarnDodgyForeignImports
199 | Opt_OverlappingInstances
200 | Opt_UndecidableInstances
201 | Opt_IncoherentInstances
202 | Opt_MonomorphismRestriction
204 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
205 | Opt_ForeignFunctionInterface
206 | Opt_UnliftedFFITypes
207 | Opt_PArr -- Syntactic support for parallel arrays
208 | Opt_Arrows -- Arrow-notation syntax
209 | Opt_TemplateHaskell
212 | Opt_Generics -- "Derivable type classes"
213 | Opt_ImplicitPrelude
214 | Opt_ScopedTypeVariables
218 | Opt_OverloadedStrings
219 | Opt_DisambiguateRecordFields
220 | Opt_RecordWildCards
226 | Opt_StandaloneDeriving
227 | Opt_DeriveDataTypeable
229 | Opt_DeriveTraversable
232 | Opt_TypeSynonymInstances
233 | Opt_FlexibleContexts
234 | Opt_FlexibleInstances
235 | Opt_ConstrainedClassMethods
236 | Opt_MultiParamTypeClasses
237 | Opt_FunctionalDependencies
239 | Opt_PolymorphicComponents
240 | Opt_ExistentialQuantification
244 | Opt_ParallelListComp
245 | Opt_TransformListComp
246 | Opt_GeneralizedNewtypeDeriving
248 | Opt_PostfixOperators
250 | Opt_LiberalTypeSynonyms
253 | Opt_ImpredicativeTypes
256 | Opt_NewQualifiedOperators
258 | Opt_PrintExplicitForalls
263 | Opt_StaticArgumentTransformation
267 | Opt_IgnoreInterfacePragmas
268 | Opt_OmitInterfacePragmas
269 | Opt_DoLambdaEtaExpansion
273 | Opt_UnboxStrictFields
276 | Opt_InlineIfEnoughArgs
277 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
279 | Opt_RegsGraph -- do graph coloring register allocation
280 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
283 | Opt_AutoSccsOnAllToplevs
284 | Opt_AutoSccsOnExportedToplevs
285 | Opt_AutoSccsOnIndividualCafs
293 | Opt_ExcessPrecision
294 | Opt_EagerBlackHoling
295 | Opt_ReadUserPackageConf
299 | Opt_HideAllPackages
300 | Opt_PrintBindResult
304 | Opt_BreakOnException
306 | Opt_PrintEvldWithShow
307 | Opt_PrintBindContents
314 | Opt_ConvertToZipCfgAndBack
315 | Opt_AutoLinkPackages
316 | Opt_ImplicitImportQualified
325 | Opt_KeepRawTokenStream
329 -- | Contains not only a collection of 'DynFlag's but also a plethora of
330 -- information relating to the compilation of a single file or GHC session
331 data DynFlags = DynFlags {
334 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
335 stgToDo :: Maybe [StgToDo], -- similarly
336 hscTarget :: HscTarget,
337 hscOutName :: String, -- ^ Name of the output file
338 extCoreName :: String, -- ^ Name of the .hcr output file
339 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
340 optLevel :: Int, -- ^ Optimisation level
341 simplPhases :: Int, -- ^ Number of simplifier phases
342 maxSimplIterations :: Int, -- ^ Max simplifier iterations
343 shouldDumpSimplPhase :: SimplifierMode -> Bool,
344 ruleCheck :: Maybe String,
346 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
347 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
348 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
350 #ifndef OMIT_NATIVE_CODEGEN
351 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
353 stolen_x86_regs :: Int,
354 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
355 importPaths :: [FilePath],
357 mainFunIs :: Maybe String,
358 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
360 dphBackend :: DPHBackend,
362 thisPackage :: PackageId, -- ^ name of package currently being compiled
365 wayNames :: [WayName], -- ^ Way flags from the command line
366 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
367 rtsBuildTag :: String, -- ^ The RTS \"way\"
369 -- For object splitting
370 splitInfo :: Maybe (String,Int),
373 objectDir :: Maybe String,
374 hiDir :: Maybe String,
375 stubDir :: Maybe String,
381 outputFile :: Maybe String,
382 outputHi :: Maybe String,
383 dynLibLoader :: DynLibLoader,
385 -- | This is set by 'DriverPipeline.runPipeline' based on where
386 -- its output is going.
387 dumpPrefix :: Maybe FilePath,
389 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
390 -- Set by @-ddump-file-prefix@
391 dumpPrefixForce :: Maybe FilePath,
393 includePaths :: [String],
394 libraryPaths :: [String],
395 frameworkPaths :: [String], -- used on darwin only
396 cmdlineFrameworks :: [String], -- ditto
397 tmpDir :: String, -- no trailing '/'
399 ghcUsagePath :: FilePath, -- Filled in by SysTools
400 ghciUsagePath :: FilePath, -- ditto
402 hpcDir :: String, -- ^ Path to store the .mix files
404 -- options for particular phases
412 opt_windres :: [String],
414 -- commands for particular phases
416 pgm_P :: (String,[Option]),
418 pgm_c :: (String,[Option]),
419 pgm_m :: (String,[Option]),
420 pgm_s :: (String,[Option]),
421 pgm_a :: (String,[Option]),
422 pgm_l :: (String,[Option]),
423 pgm_dll :: (String,[Option]),
425 pgm_sysman :: String,
426 pgm_windres :: String,
429 depMakefile :: FilePath,
430 depIncludePkgDeps :: Bool,
431 depExcludeMods :: [ModuleName],
432 depSuffixes :: [String],
435 extraPkgConfs :: [FilePath],
436 topDir :: FilePath, -- filled in by SysTools
437 systemPackageConfig :: FilePath, -- ditto
438 -- ^ The @-package-conf@ flags given on the command line, in the order
441 packageFlags :: [PackageFlag],
442 -- ^ The @-package@ and @-hide-package@ flags from the command-line
445 -- NB. do not modify this field, it is calculated by
446 -- Packages.initPackages and Packages.updatePackages.
447 pkgDatabase :: Maybe (UniqFM PackageConfig),
448 pkgState :: PackageState,
451 -- These have to be IORefs, because the defaultCleanupHandler needs to
452 -- know what to clean when an exception happens
453 filesToClean :: IORef [FilePath],
454 dirsToClean :: IORef (FiniteMap FilePath FilePath),
459 -- | Message output action: use "ErrUtils" instead of this if you can
460 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
462 haddockOptions :: Maybe String
465 -- | The target code type of the compilation (if any).
467 -- Whenever you change the target, also make sure to set 'ghcLink' to
468 -- something sensible.
470 -- 'HscNothing' can be used to avoid generating any output, however, note
473 -- * This will not run the desugaring step, thus no warnings generated in
474 -- this step will be output. In particular, this includes warnings related
475 -- to pattern matching. You can run the desugarer manually using
476 -- 'GHC.desugarModule'.
478 -- * If a program uses Template Haskell the typechecker may try to run code
479 -- from an imported module. This will fail if no code has been generated
480 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
481 -- whether this might be the case and choose to either switch to a
482 -- different target or avoid typechecking such modules. (The latter may
483 -- preferable for security reasons.)
486 = HscC -- ^ Generate C code.
487 | HscAsm -- ^ Generate assembly using the native code generator.
488 | HscJava -- ^ Generate Java bytecode.
489 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
490 | HscNothing -- ^ Don't generate any code. See notes above.
493 -- | Will this target result in an object file on the disk?
494 isObjectTarget :: HscTarget -> Bool
495 isObjectTarget HscC = True
496 isObjectTarget HscAsm = True
497 isObjectTarget _ = False
499 -- | The 'GhcMode' tells us whether we're doing multi-module
500 -- compilation (controlled via the "GHC" API) or one-shot
501 -- (single-module) compilation. This makes a difference primarily to
502 -- the "Finder": in one-shot mode we look for interface files for
503 -- imported modules, but in multi-module mode we look for source files
504 -- in order to check whether they need to be recompiled.
506 = CompManager -- ^ @\-\-make@, GHCi, etc.
507 | OneShot -- ^ @ghc -c Foo.hs@
508 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
511 instance Outputable GhcMode where
512 ppr CompManager = ptext (sLit "CompManager")
513 ppr OneShot = ptext (sLit "OneShot")
514 ppr MkDepend = ptext (sLit "MkDepend")
516 isOneShot :: GhcMode -> Bool
517 isOneShot OneShot = True
518 isOneShot _other = False
520 -- | What to do in the link step, if there is one.
522 = NoLink -- ^ Don't link at all
523 | LinkBinary -- ^ Link object code into a binary
524 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
525 -- bytecode and object code).
526 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
529 isNoLink :: GhcLink -> Bool
530 isNoLink NoLink = True
533 -- Is it worth evaluating this Bool and caching it in the DynFlags value
534 -- during initDynFlags?
535 doingTickyProfiling :: DynFlags -> Bool
536 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
539 = ExposePackage String
541 | IgnorePackage String
544 defaultHscTarget :: HscTarget
545 defaultHscTarget = defaultObjectTarget
547 -- | The 'HscTarget' value corresponding to the default way to create
548 -- object files on the current platform.
549 defaultObjectTarget :: HscTarget
551 | cGhcWithNativeCodeGen == "YES" = HscAsm
556 | Wrapped (Maybe String)
560 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
561 initDynFlags :: DynFlags -> IO DynFlags
562 initDynFlags dflags = do
563 -- someday these will be dynamic flags
564 ways <- readIORef v_Ways
565 build_tag <- readIORef v_Build_tag
566 rts_build_tag <- readIORef v_RTS_Build_tag
567 refFilesToClean <- newIORef []
568 refDirsToClean <- newIORef emptyFM
571 buildTag = build_tag,
572 rtsBuildTag = rts_build_tag,
573 filesToClean = refFilesToClean,
574 dirsToClean = refDirsToClean
577 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
578 -- and must be fully initialized by 'GHC.newSession' first.
579 defaultDynFlags :: DynFlags
582 ghcMode = CompManager,
583 ghcLink = LinkBinary,
586 hscTarget = defaultHscTarget,
592 maxSimplIterations = 4,
593 shouldDumpSimplPhase = const False,
595 specConstrThreshold = Just 200,
596 specConstrCount = Just 3,
597 liberateCaseThreshold = Just 200,
598 #ifndef OMIT_NATIVE_CODEGEN
599 targetPlatform = defaultTargetPlatform,
602 cmdlineHcIncludes = [],
606 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
610 thisPackage = mainPackageId,
616 objectSuf = phaseInputExt StopLn,
617 hcSuf = phaseInputExt HCc,
620 outputFile = Nothing,
622 dynLibLoader = SystemDependent,
623 dumpPrefix = Nothing,
624 dumpPrefixForce = Nothing,
628 cmdlineFrameworks = [],
629 tmpDir = cDEFAULT_TMPDIR,
635 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
646 pkgDatabase = Nothing,
647 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
648 wayNames = panic "defaultDynFlags: No wayNames",
649 buildTag = panic "defaultDynFlags: No buildTag",
650 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
652 -- initSysTools fills all these in
653 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
654 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
655 topDir = panic "defaultDynFlags: No topDir",
656 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
657 pgm_L = panic "defaultDynFlags: No pgm_L",
658 pgm_P = panic "defaultDynFlags: No pgm_P",
659 pgm_F = panic "defaultDynFlags: No pgm_F",
660 pgm_c = panic "defaultDynFlags: No pgm_c",
661 pgm_m = panic "defaultDynFlags: No pgm_m",
662 pgm_s = panic "defaultDynFlags: No pgm_s",
663 pgm_a = panic "defaultDynFlags: No pgm_a",
664 pgm_l = panic "defaultDynFlags: No pgm_l",
665 pgm_dll = panic "defaultDynFlags: No pgm_dll",
666 pgm_T = panic "defaultDynFlags: No pgm_T",
667 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
668 pgm_windres = panic "defaultDynFlags: No pgm_windres",
669 -- end of initSysTools values
671 depMakefile = "Makefile",
672 depIncludePkgDeps = False,
675 -- end of ghc -M values
676 filesToClean = panic "defaultDynFlags: No filesToClean",
677 dirsToClean = panic "defaultDynFlags: No dirsToClean",
678 haddockOptions = Nothing,
680 Opt_AutoLinkPackages,
681 Opt_ReadUserPackageConf,
683 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
684 -- behaviour the default, to see if anyone notices
688 Opt_MonomorphismRestriction,
696 Opt_PrintBindContents
698 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
699 -- The default -O0 options
702 log_action = \severity srcSpan style msg ->
704 SevInfo -> printErrs (msg style)
705 SevFatal -> printErrs (msg style)
708 printErrs ((mkLocMessage srcSpan msg) style)
709 -- careful (#2302): printErrs prints in UTF-8, whereas
710 -- converting to string first and using hPutStr would
711 -- just emit the low 8 bits of each unicode char.
718 0 | print errors & warnings only
719 1 | minimal verbosity: print "compiling M ... done." for each module.
720 2 | equivalent to -dshow-passes
721 3 | equivalent to existing "ghc -v"
722 4 | "ghc -v -ddump-most"
723 5 | "ghc -v -ddump-all"
726 -- | Test whether a 'DynFlag' is set
727 dopt :: DynFlag -> DynFlags -> Bool
728 dopt f dflags = f `elem` (flags dflags)
731 dopt_set :: DynFlags -> DynFlag -> DynFlags
732 dopt_set dfs f = dfs{ flags = f : flags dfs }
734 -- | Unset a 'DynFlag'
735 dopt_unset :: DynFlags -> DynFlag -> DynFlags
736 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
738 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
739 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
740 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
741 -> [a] -- ^ Correctly ordered extracted options
742 getOpts dflags opts = reverse (opts dflags)
743 -- We add to the options from the front, so we need to reverse the list
745 -- | Gets the verbosity flag for the current verbosity level. This is fed to
746 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
747 getVerbFlag :: DynFlags -> String
749 | verbosity dflags >= 3 = "-v"
752 setObjectDir, setHiDir, setStubDir, setOutputDir,
753 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
754 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
755 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
756 addCmdlineFramework, addHaddockOpts
757 :: String -> DynFlags -> DynFlags
758 setOutputFile, setOutputHi, setDumpPrefixForce
759 :: Maybe String -> DynFlags -> DynFlags
761 setObjectDir f d = d{ objectDir = Just f}
762 setHiDir f d = d{ hiDir = Just f}
763 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
764 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
765 -- \#included from the .hc file when compiling with -fvia-C.
766 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
768 setObjectSuf f d = d{ objectSuf = f}
769 setHiSuf f d = d{ hiSuf = f}
770 setHcSuf f d = d{ hcSuf = f}
772 setOutputFile f d = d{ outputFile = f}
773 setOutputHi f d = d{ outputHi = f}
775 parseDynLibLoaderMode f d =
777 ("deploy", "") -> d{ dynLibLoader = Deployable }
778 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
779 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
780 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
781 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
782 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
784 setDumpPrefixForce f d = d { dumpPrefixForce = f}
786 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
787 -- Config.hs should really use Option.
788 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
790 setPgmL f d = d{ pgm_L = f}
791 setPgmF f d = d{ pgm_F = f}
792 setPgmc f d = d{ pgm_c = (f,[])}
793 setPgmm f d = d{ pgm_m = (f,[])}
794 setPgms f d = d{ pgm_s = (f,[])}
795 setPgma f d = d{ pgm_a = (f,[])}
796 setPgml f d = d{ pgm_l = (f,[])}
797 setPgmdll f d = d{ pgm_dll = (f,[])}
798 setPgmwindres f d = d{ pgm_windres = f}
800 addOptL f d = d{ opt_L = f : opt_L d}
801 addOptP f d = d{ opt_P = f : opt_P d}
802 addOptF f d = d{ opt_F = f : opt_F d}
803 addOptc f d = d{ opt_c = f : opt_c d}
804 addOptm f d = d{ opt_m = f : opt_m d}
805 addOpta f d = d{ opt_a = f : opt_a d}
806 addOptl f d = d{ opt_l = f : opt_l d}
807 addOptwindres f d = d{ opt_windres = f : opt_windres d}
809 setDepMakefile :: FilePath -> DynFlags -> DynFlags
810 setDepMakefile f d = d { depMakefile = deOptDep f }
812 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
813 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
815 addDepExcludeMod :: String -> DynFlags -> DynFlags
817 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
819 addDepSuffix :: FilePath -> DynFlags -> DynFlags
820 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
823 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
824 -- we need to strip the "-optdep" off of the arg
825 deOptDep :: String -> String
826 deOptDep x = case maybePrefixMatch "-optdep" x of
830 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
832 addHaddockOpts f d = d{ haddockOptions = Just f}
834 -- -----------------------------------------------------------------------------
835 -- Command-line options
837 -- | When invoking external tools as part of the compilation pipeline, we
838 -- pass these a sequence of options on the command-line. Rather than
839 -- just using a list of Strings, we use a type that allows us to distinguish
840 -- between filepaths and 'other stuff'. The reason for this is that
841 -- this type gives us a handle on transforming filenames, and filenames only,
842 -- to whatever format they're expected to be on a particular platform.
844 = FileOption -- an entry that _contains_ filename(s) / filepaths.
845 String -- a non-filepath prefix that shouldn't be
846 -- transformed (e.g., "/out=")
847 String -- the filepath/filename portion
850 -----------------------------------------------------------------------------
851 -- Setting the optimisation level
853 updOptLevel :: Int -> DynFlags -> DynFlags
854 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
856 = dfs2{ optLevel = final_n }
858 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
859 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
860 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
862 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
863 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
865 optLevelFlags :: [([Int], DynFlag)]
867 = [ ([0], Opt_IgnoreInterfacePragmas)
868 , ([0], Opt_OmitInterfacePragmas)
870 , ([1,2], Opt_IgnoreAsserts)
871 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
873 , ([1,2], Opt_DoEtaReduction)
874 , ([1,2], Opt_CaseMerge)
875 , ([1,2], Opt_Strictness)
877 , ([1,2], Opt_FullLaziness)
879 , ([2], Opt_LiberateCase)
880 , ([2], Opt_SpecConstr)
882 -- , ([2], Opt_StaticArgumentTransformation)
883 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
884 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
885 -- several improvements to the heuristics, and I'm concerned that without
886 -- those changes SAT will interfere with some attempts to write "high
887 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
888 -- this year. In particular, the version in HEAD lacks the tail call
889 -- criterion, so many things that look like reasonable loops will be
890 -- turned into functions with extra (unneccesary) thunk creation.
892 , ([0,1,2], Opt_DoLambdaEtaExpansion)
893 -- This one is important for a tiresome reason:
894 -- we want to make sure that the bindings for data
895 -- constructors are eta-expanded. This is probably
896 -- a good thing anyway, but it seems fragile.
899 -- -----------------------------------------------------------------------------
900 -- Standard sets of warning options
902 standardWarnings :: [DynFlag]
904 = [ Opt_WarnWarningsDeprecations,
905 Opt_WarnDeprecatedFlags,
906 Opt_WarnUnrecognisedPragmas,
907 Opt_WarnOverlappingPatterns,
908 Opt_WarnMissingFields,
909 Opt_WarnMissingMethods,
910 Opt_WarnDuplicateExports,
911 Opt_WarnDodgyForeignImports
914 minusWOpts :: [DynFlag]
916 = standardWarnings ++
917 [ Opt_WarnUnusedBinds,
918 Opt_WarnUnusedMatches,
919 Opt_WarnUnusedImports,
920 Opt_WarnIncompletePatterns,
924 minusWallOpts :: [DynFlag]
927 [ Opt_WarnTypeDefaults,
928 Opt_WarnNameShadowing,
934 -- minuswRemovesOpts should be every warning option
935 minuswRemovesOpts :: [DynFlag]
938 [Opt_WarnImplicitPrelude,
939 Opt_WarnIncompletePatternsRecUpd,
940 Opt_WarnSimplePatterns,
941 Opt_WarnMonomorphism,
942 Opt_WarnUnrecognisedPragmas,
946 -- -----------------------------------------------------------------------------
947 -- CoreToDo: abstraction of core-to-core passes to run.
949 data CoreToDo -- These are diff core-to-core passes,
950 -- which may be invoked in any order,
951 -- as many times as you like.
953 = CoreDoSimplify -- The core-to-core simplifier.
956 -- Each run of the simplifier can take a different
957 -- set of simplifier-specific flags.
959 | CoreDoFloatOutwards FloatOutSwitches
964 | CoreDoWorkerWrapper
967 | CoreDoOldStrictness
970 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
971 -- matching this string
972 | CoreDoVectorisation PackageId
973 | CoreDoNothing -- Useful when building up
974 | CoreDoPasses [CoreToDo] -- lists of these things
977 data SimplifierMode -- See comments in SimplMonad
979 | SimplPhase Int [String]
981 instance Outputable SimplifierMode where
982 ppr SimplGently = ptext (sLit "gentle")
983 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
986 data SimplifierSwitch
987 = MaxSimplifierIterations Int
991 data FloatOutSwitches = FloatOutSwitches {
992 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
993 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
994 -- even if they do not escape a lambda
997 instance Outputable FloatOutSwitches where
998 ppr = pprFloatOutSwitches
1000 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
1001 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
1002 <+> pp_not (floatOutConstants sw) <+> text "constants"
1005 pp_not False = text "not"
1007 -- | Switches that specify the minimum amount of floating out
1008 -- gentleFloatOutSwitches :: FloatOutSwitches
1009 -- gentleFloatOutSwitches = FloatOutSwitches False False
1011 -- | Switches that do not specify floating out of lambdas, just of constants
1012 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1013 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1016 -- The core-to-core pass ordering is derived from the DynFlags:
1017 runWhen :: Bool -> CoreToDo -> CoreToDo
1018 runWhen True do_this = do_this
1019 runWhen False _ = CoreDoNothing
1021 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1022 runMaybe (Just x) f = f x
1023 runMaybe Nothing _ = CoreDoNothing
1025 getCoreToDo :: DynFlags -> [CoreToDo]
1027 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1028 | otherwise = core_todo
1030 opt_level = optLevel dflags
1031 phases = simplPhases dflags
1032 max_iter = maxSimplIterations dflags
1033 strictness = dopt Opt_Strictness dflags
1034 full_laziness = dopt Opt_FullLaziness dflags
1035 cse = dopt Opt_CSE dflags
1036 spec_constr = dopt Opt_SpecConstr dflags
1037 liberate_case = dopt Opt_LiberateCase dflags
1038 rule_check = ruleCheck dflags
1039 static_args = dopt Opt_StaticArgumentTransformation dflags
1041 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1043 simpl_phase phase names iter
1045 [ CoreDoSimplify (SimplPhase phase names) [
1046 MaxSimplifierIterations iter
1048 maybe_rule_check phase
1052 = runWhen (dopt Opt_Vectorise dflags)
1053 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1056 -- By default, we have 2 phases before phase 0.
1058 -- Want to run with inline phase 2 after the specialiser to give
1059 -- maximum chance for fusion to work before we inline build/augment
1060 -- in phase 1. This made a difference in 'ansi' where an
1061 -- overloaded function wasn't inlined till too late.
1063 -- Need phase 1 so that build/augment get
1064 -- inlined. I found that spectral/hartel/genfft lost some useful
1065 -- strictness in the function sumcode' if augment is not inlined
1066 -- before strictness analysis runs
1067 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1068 | phase <- [phases, phases-1 .. 1] ]
1071 -- initial simplify: mk specialiser happy: minimum effort please
1072 simpl_gently = CoreDoSimplify SimplGently [
1073 -- Simplify "gently"
1074 -- Don't inline anything till full laziness has bitten
1075 -- In particular, inlining wrappers inhibits floating
1076 -- e.g. ...(case f x of ...)...
1077 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1078 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1079 -- and now the redex (f x) isn't floatable any more
1080 -- Similarly, don't apply any rules until after full
1081 -- laziness. Notably, list fusion can prevent floating.
1083 NoCaseOfCase, -- Don't do case-of-case transformations.
1084 -- This makes full laziness work better
1085 MaxSimplifierIterations max_iter
1089 if opt_level == 0 then
1091 simpl_phase 0 ["final"] max_iter]
1092 else {- opt_level >= 1 -} [
1094 -- We want to do the static argument transform before full laziness as it
1095 -- may expose extra opportunities to float things outwards. However, to fix
1096 -- up the output of the transformation we need at do at least one simplify
1097 -- after this before anything else
1098 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1100 -- We run vectorisation here for now, but we might also try to run
1104 -- initial simplify: mk specialiser happy: minimum effort please
1107 -- Specialisation is best done before full laziness
1108 -- so that overloaded functions have all their dictionary lambdas manifest
1111 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1112 -- Was: gentleFloatOutSwitches
1113 -- I have no idea why, but not floating constants to top level is
1114 -- very bad in some cases.
1115 -- Notably: p_ident in spectral/rewrite
1116 -- Changing from "gentle" to "constantsOnly" improved
1117 -- rewrite's allocation by 19%, and made 0.0% difference
1118 -- to any other nofib benchmark
1124 -- Phase 0: allow all Ids to be inlined now
1125 -- This gets foldr inlined before strictness analysis
1127 -- At least 3 iterations because otherwise we land up with
1128 -- huge dead expressions because of an infelicity in the
1130 -- let k = BIG in foldr k z xs
1131 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1132 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1134 simpl_phase 0 ["main"] (max max_iter 3),
1137 #ifdef OLD_STRICTNESS
1138 CoreDoOldStrictness,
1140 runWhen strictness (CoreDoPasses [
1142 CoreDoWorkerWrapper,
1144 simpl_phase 0 ["post-worker-wrapper"] max_iter
1147 runWhen full_laziness
1148 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1149 -- nofib/spectral/hartel/wang doubles in speed if you
1150 -- do full laziness late in the day. It only happens
1151 -- after fusion and other stuff, so the early pass doesn't
1152 -- catch it. For the record, the redex is
1153 -- f_el22 (f_el21 r_midblock)
1156 runWhen cse CoreCSE,
1157 -- We want CSE to follow the final full-laziness pass, because it may
1158 -- succeed in commoning up things floated out by full laziness.
1159 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1165 -- Case-liberation for -O2. This should be after
1166 -- strictness analysis and the simplification which follows it.
1167 runWhen liberate_case (CoreDoPasses [
1169 simpl_phase 0 ["post-liberate-case"] max_iter
1170 ]), -- Run the simplifier after LiberateCase to vastly
1171 -- reduce the possiblility of shadowing
1172 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1174 runWhen spec_constr CoreDoSpecConstr,
1178 -- Final clean-up simplification:
1179 simpl_phase 0 ["final"] max_iter
1182 -- -----------------------------------------------------------------------------
1183 -- StgToDo: abstraction of stg-to-stg passes to run.
1186 = StgDoMassageForProfiling -- should be (next to) last
1187 -- There's also setStgVarInfo, but its absolute "lastness"
1188 -- is so critical that it is hardwired in (no flag).
1191 getStgToDo :: DynFlags -> [StgToDo]
1193 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1196 stg_stats = dopt Opt_StgStats dflags
1198 todo1 = if stg_stats then [D_stg_stats] else []
1200 todo2 | WayProf `elem` wayNames dflags
1201 = StgDoMassageForProfiling : todo1
1205 -- -----------------------------------------------------------------------------
1208 allFlags :: [String]
1209 allFlags = map ('-':) $
1210 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1211 map ("fno-"++) flags ++
1212 map ("f"++) flags ++
1213 map ("X"++) supportedLanguages ++
1214 map ("XNo"++) supportedLanguages
1215 where ok (PrefixPred _ _) = False
1217 flags = [ name | (name, _, _) <- fFlags ]
1219 dynamic_flags :: [Flag DynP]
1221 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1222 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1223 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1224 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1225 , Flag "v" (OptIntSuffix setVerbosity) Supported
1227 ------- Specific phases --------------------------------------------
1228 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1229 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1230 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1231 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1232 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1233 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1234 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1235 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1236 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1237 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1239 , Flag "optL" (HasArg (upd . addOptL)) Supported
1240 , Flag "optP" (HasArg (upd . addOptP)) Supported
1241 , Flag "optF" (HasArg (upd . addOptF)) Supported
1242 , Flag "optc" (HasArg (upd . addOptc)) Supported
1243 , Flag "optm" (HasArg (upd . addOptm)) Supported
1244 , Flag "opta" (HasArg (upd . addOpta)) Supported
1245 , Flag "optl" (HasArg (upd . addOptl)) Supported
1246 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1249 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1252 -------- ghc -M -----------------------------------------------------
1253 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1254 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1255 (Deprecated "Use -dep-suffix instead")
1256 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1257 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1258 (Deprecated "Use -dep-makefile instead")
1259 , Flag "optdep-w" (NoArg (return ()))
1260 (Deprecated "-optdep-w doesn't do anything")
1261 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1262 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1263 (Deprecated "Use -include-pkg-deps instead")
1264 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1265 (Deprecated "Use -include-pkg-deps instead")
1266 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1267 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1268 (Deprecated "Use -exclude-module instead")
1269 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1270 (Deprecated "Use -exclude-module instead")
1272 -------- Linking ----------------------------------------------------
1273 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1275 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1276 (Deprecated "Use -c instead")
1277 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1279 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1282 ------- Libraries ---------------------------------------------------
1283 , Flag "L" (Prefix addLibraryPath ) Supported
1284 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1286 ------- Frameworks --------------------------------------------------
1287 -- -framework-path should really be -F ...
1288 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1289 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1291 ------- Output Redirection ------------------------------------------
1292 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1293 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1294 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1295 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1296 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1297 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1298 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1299 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1300 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1301 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1302 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1305 ------- Keeping temporary files -------------------------------------
1306 -- These can be singular (think ghc -c) or plural (think ghc --make)
1307 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1308 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1309 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1310 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1311 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1312 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1313 -- This only makes sense as plural
1314 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1316 ------- Miscellaneous ----------------------------------------------
1317 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1318 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1319 , Flag "main-is" (SepArg setMainIs ) Supported
1320 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1321 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1322 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1324 ------- recompilation checker --------------------------------------
1325 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1326 (Deprecated "Use -fno-force-recomp instead")
1327 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1328 (Deprecated "Use -fforce-recomp instead")
1330 ------ HsCpp opts ---------------------------------------------------
1331 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1332 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1334 ------- Include/Import Paths ----------------------------------------
1335 , Flag "I" (Prefix addIncludePath) Supported
1336 , Flag "i" (OptPrefix addImportPath ) Supported
1338 ------ Debugging ----------------------------------------------------
1339 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1341 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1343 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1345 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1347 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1349 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1351 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1353 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1355 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1357 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1359 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1361 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1363 , Flag "ddump-asm-regalloc-stages"
1364 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1366 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1368 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1370 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1372 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1374 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1376 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1378 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1380 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1382 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1384 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1386 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1388 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1390 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1392 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1394 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1396 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1398 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1400 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1402 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1404 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1406 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1408 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1410 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1412 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1414 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1416 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1418 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1420 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1422 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1424 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1426 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1428 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1430 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1432 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1434 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1436 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1438 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1440 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1442 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1444 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1446 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1448 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1450 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1452 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1455 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1457 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1459 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1461 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1463 , Flag "dshow-passes"
1464 (NoArg (do forceRecompile
1465 setVerbosity (Just 2)))
1467 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1470 ------ Machine dependant (-m<blah>) stuff ---------------------------
1472 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1474 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1476 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1479 ------ Warning opts -------------------------------------------------
1480 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1482 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1484 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1486 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1488 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1489 (Deprecated "Use -w instead")
1490 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1493 ------ Optimisation flags ------------------------------------------
1494 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1495 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1496 (Deprecated "Use -O0 instead")
1497 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1498 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1500 -- If the number is missing, use 1
1502 , Flag "fsimplifier-phases"
1503 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1505 , Flag "fmax-simplifier-iterations"
1506 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1509 , Flag "fspec-constr-threshold"
1510 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1512 , Flag "fno-spec-constr-threshold"
1513 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1515 , Flag "fspec-constr-count"
1516 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1518 , Flag "fno-spec-constr-count"
1519 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1521 , Flag "fliberate-case-threshold"
1522 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1524 , Flag "fno-liberate-case-threshold"
1525 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1528 , Flag "frule-check"
1529 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1531 , Flag "fcontext-stack"
1532 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1535 ------ Profiling ----------------------------------------------------
1537 -- XXX Should the -f* flags be deprecated?
1538 -- They don't seem to be documented
1539 , Flag "fauto-sccs-on-all-toplevs"
1540 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1543 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1545 , Flag "no-auto-all"
1546 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1548 , Flag "fauto-sccs-on-exported-toplevs"
1549 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1552 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1555 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1557 , Flag "fauto-sccs-on-individual-cafs"
1558 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1561 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1564 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1567 ------ DPH flags ----------------------------------------------------
1570 (NoArg (setDPHBackend DPHSeq))
1573 (NoArg (setDPHBackend DPHPar))
1576 (NoArg (setDPHBackend DPHThis))
1579 ------ Compiler flags -----------------------------------------------
1581 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1582 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1583 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1585 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1586 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1587 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1589 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1591 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1594 ++ map (mkFlag True "f" setDynFlag ) fFlags
1595 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1596 ++ map (mkFlag True "X" setDynFlag ) xFlags
1597 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1599 package_flags :: [Flag DynP]
1601 ------- Packages ----------------------------------------------------
1602 Flag "package-conf" (HasArg extraPkgConf_) Supported
1603 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1605 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1606 , Flag "package" (HasArg exposePackage) Supported
1607 , Flag "hide-package" (HasArg hidePackage) Supported
1608 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1610 , Flag "ignore-package" (HasArg ignorePackage)
1612 , Flag "syslib" (HasArg exposePackage)
1613 (Deprecated "Use -package instead")
1616 mkFlag :: Bool -- ^ True <=> it should be turned on
1617 -> String -- ^ The flag prefix
1618 -> (DynFlag -> DynP ())
1619 -> (String, DynFlag, Bool -> Deprecated)
1621 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1622 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1624 deprecatedForLanguage :: String -> Bool -> Deprecated
1625 deprecatedForLanguage lang turn_on
1626 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1628 flag | turn_on = lang
1629 | otherwise = "No"++lang
1631 useInstead :: String -> Bool -> Deprecated
1632 useInstead flag turn_on
1633 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1635 no = if turn_on then "" else "no-"
1637 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1638 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1640 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1641 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1642 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1643 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1644 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1645 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1646 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1647 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1648 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1649 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1650 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1651 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1652 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1653 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1654 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1655 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1656 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1657 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1658 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1659 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1660 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1661 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1662 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1663 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1664 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1665 ( "strictness", Opt_Strictness, const Supported ),
1666 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1667 ( "full-laziness", Opt_FullLaziness, const Supported ),
1668 ( "liberate-case", Opt_LiberateCase, const Supported ),
1669 ( "spec-constr", Opt_SpecConstr, const Supported ),
1670 ( "cse", Opt_CSE, const Supported ),
1671 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1672 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1673 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1674 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1675 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1676 ( "case-merge", Opt_CaseMerge, const Supported ),
1677 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1678 ( "method-sharing", Opt_MethodSharing, const Supported ),
1679 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1680 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1681 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1682 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1683 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1684 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1685 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1686 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1687 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1688 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1689 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1690 ( "break-on-error", Opt_BreakOnError, const Supported ),
1691 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1692 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1693 ( "run-cps", Opt_RunCPS, const Supported ),
1694 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1695 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1696 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1697 ( "vectorise", Opt_Vectorise, const Supported ),
1698 ( "regs-graph", Opt_RegsGraph, const Supported ),
1699 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1700 ( "th", Opt_TemplateHaskell,
1701 deprecatedForLanguage "TemplateHaskell" ),
1702 ( "fi", Opt_ForeignFunctionInterface,
1703 deprecatedForLanguage "ForeignFunctionInterface" ),
1704 ( "ffi", Opt_ForeignFunctionInterface,
1705 deprecatedForLanguage "ForeignFunctionInterface" ),
1706 ( "arrows", Opt_Arrows,
1707 deprecatedForLanguage "Arrows" ),
1708 ( "generics", Opt_Generics,
1709 deprecatedForLanguage "Generics" ),
1710 ( "implicit-prelude", Opt_ImplicitPrelude,
1711 deprecatedForLanguage "ImplicitPrelude" ),
1712 ( "bang-patterns", Opt_BangPatterns,
1713 deprecatedForLanguage "BangPatterns" ),
1714 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1715 deprecatedForLanguage "MonomorphismRestriction" ),
1716 ( "mono-pat-binds", Opt_MonoPatBinds,
1717 deprecatedForLanguage "MonoPatBinds" ),
1718 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1719 deprecatedForLanguage "ExtendedDefaultRules" ),
1720 ( "implicit-params", Opt_ImplicitParams,
1721 deprecatedForLanguage "ImplicitParams" ),
1722 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1723 deprecatedForLanguage "ScopedTypeVariables" ),
1725 deprecatedForLanguage "PArr" ),
1726 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1727 deprecatedForLanguage "OverlappingInstances" ),
1728 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1729 deprecatedForLanguage "UndecidableInstances" ),
1730 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1731 deprecatedForLanguage "IncoherentInstances" ),
1732 ( "gen-manifest", Opt_GenManifest, const Supported ),
1733 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1734 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1737 supportedLanguages :: [String]
1738 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1740 -- This may contain duplicates
1741 languageOptions :: [DynFlag]
1742 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1744 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1745 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1747 ( "CPP", Opt_Cpp, const Supported ),
1748 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1749 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1750 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1751 ( "MagicHash", Opt_MagicHash, const Supported ),
1752 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1753 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1754 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1755 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1756 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1757 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1758 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1759 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1760 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1761 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1762 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1763 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1764 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1765 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1766 ( "Arrows", Opt_Arrows, const Supported ),
1767 ( "PArr", Opt_PArr, const Supported ),
1768 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1769 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1770 ( "Generics", Opt_Generics, const Supported ),
1772 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1773 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1774 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1775 ( "RecordPuns", Opt_RecordPuns,
1776 deprecatedForLanguage "NamedFieldPuns" ),
1777 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1778 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1779 ( "GADTs", Opt_GADTs, const Supported ),
1780 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1781 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1782 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1784 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1785 -- On by default (which is not strictly H98):
1786 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1787 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1788 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1789 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1790 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1792 ( "PatternSignatures", Opt_ScopedTypeVariables,
1793 deprecatedForLanguage "ScopedTypeVariables" ),
1795 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1796 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1797 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1798 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1799 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1800 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1801 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1802 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1803 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1804 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1805 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1806 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1807 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1808 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1809 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1810 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1811 ( "PackageImports", Opt_PackageImports, const Supported ),
1812 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1815 impliedFlags :: [(DynFlag, DynFlag)]
1817 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1818 -- be completely rigid for GADTs
1820 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1821 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1822 -- all over the place
1824 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1825 -- Note [Scoped tyvars] in TcBinds
1826 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1829 glasgowExtsFlags :: [DynFlag]
1830 glasgowExtsFlags = [
1831 Opt_PrintExplicitForalls
1832 , Opt_ForeignFunctionInterface
1833 , Opt_UnliftedFFITypes
1835 , Opt_ImplicitParams
1836 , Opt_ScopedTypeVariables
1838 , Opt_TypeSynonymInstances
1839 , Opt_StandaloneDeriving
1840 , Opt_DeriveDataTypeable
1842 , Opt_DeriveFoldable
1843 , Opt_DeriveTraversable
1844 , Opt_FlexibleContexts
1845 , Opt_FlexibleInstances
1846 , Opt_ConstrainedClassMethods
1847 , Opt_MultiParamTypeClasses
1848 , Opt_FunctionalDependencies
1850 , Opt_PolymorphicComponents
1851 , Opt_ExistentialQuantification
1853 , Opt_PostfixOperators
1855 , Opt_LiberalTypeSynonyms
1859 , Opt_ParallelListComp
1860 , Opt_EmptyDataDecls
1861 , Opt_KindSignatures
1862 , Opt_GeneralizedNewtypeDeriving
1863 , Opt_TypeFamilies ]
1865 -- -----------------------------------------------------------------------------
1866 -- Parsing the dynamic flags.
1868 -- | Parse dynamic flags from a list of command line arguments. Returns the
1869 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1870 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1871 -- flags or missing arguments).
1872 parseDynamicFlags :: Monad m =>
1873 DynFlags -> [Located String]
1874 -> m (DynFlags, [Located String], [Located String])
1875 -- ^ Updated 'DynFlags', left-over arguments, and
1876 -- list of warnings.
1877 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1879 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1880 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1881 parseDynamicNoPackageFlags :: Monad m =>
1882 DynFlags -> [Located String]
1883 -> m (DynFlags, [Located String], [Located String])
1884 -- ^ Updated 'DynFlags', left-over arguments, and
1885 -- list of warnings.
1886 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1888 parseDynamicFlags_ :: Monad m =>
1889 DynFlags -> [Located String] -> Bool
1890 -> m (DynFlags, [Located String], [Located String])
1891 parseDynamicFlags_ dflags args pkg_flags = do
1892 -- XXX Legacy support code
1893 -- We used to accept things like
1894 -- optdep-f -optdepdepend
1895 -- optdep-f -optdep depend
1896 -- optdep -f -optdepdepend
1897 -- optdep -f -optdep depend
1898 -- but the spaces trip up proper argument handling. So get rid of them.
1899 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1900 f (x : xs) = x : f xs
1904 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1905 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1906 | otherwise = dynamic_flags
1908 let ((leftover, errs, warns), dflags')
1909 = runCmdLine (processArgs flag_spec args') dflags
1910 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1911 return (dflags', leftover, warns)
1913 type DynP = CmdLineP DynFlags
1915 upd :: (DynFlags -> DynFlags) -> DynP ()
1917 dfs <- getCmdLineState
1918 putCmdLineState $! (f dfs)
1920 --------------------------
1921 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1922 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1923 ; mapM_ setDynFlag deps }
1925 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1926 -- When you set f, set the ones it implies
1927 -- NB: use setDynFlag recursively, in case the implied flags
1928 -- implies further flags
1929 -- When you un-set f, however, we don't un-set the things it implies
1930 -- (except for -fno-glasgow-exts, which is treated specially)
1932 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1934 --------------------------
1935 setDumpFlag :: DynFlag -> OptKind DynP
1936 setDumpFlag dump_flag
1937 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1939 -- Certain dumpy-things are really interested in what's going
1940 -- on during recompilation checking, so in those cases we
1941 -- don't want to turn it off.
1942 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1943 Opt_D_dump_hi_diffs]
1945 forceRecompile :: DynP ()
1946 -- Whenver we -ddump, force recompilation (by switching off the
1947 -- recompilation checker), else you don't see the dump! However,
1948 -- don't switch it off in --make mode, else *everything* gets
1949 -- recompiled which probably isn't what you want
1950 forceRecompile = do { dfs <- getCmdLineState
1951 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1953 force_recomp dfs = isOneShot (ghcMode dfs)
1955 setVerboseCore2Core :: DynP ()
1956 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1958 upd (\s -> s { shouldDumpSimplPhase = const True })
1960 setDumpSimplPhases :: String -> DynP ()
1961 setDumpSimplPhases s = do forceRecompile
1962 upd (\s -> s { shouldDumpSimplPhase = spec })
1964 spec :: SimplifierMode -> Bool
1966 . map (join (&&) . map match . split ':')
1972 join :: (Bool -> Bool -> Bool)
1973 -> [SimplifierMode -> Bool]
1974 -> SimplifierMode -> Bool
1975 join _ [] = const True
1976 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1978 match :: String -> SimplifierMode -> Bool
1979 match "" = const True
1980 match s = case reads s of
1981 [(n,"")] -> phase_num n
1984 phase_num :: Int -> SimplifierMode -> Bool
1985 phase_num n (SimplPhase k _) = n == k
1986 phase_num _ _ = False
1988 phase_name :: String -> SimplifierMode -> Bool
1989 phase_name s SimplGently = s == "gentle"
1990 phase_name s (SimplPhase _ ss) = s `elem` ss
1992 setVerbosity :: Maybe Int -> DynP ()
1993 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1995 addCmdlineHCInclude :: String -> DynP ()
1996 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1998 extraPkgConf_ :: FilePath -> DynP ()
1999 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2001 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2003 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2005 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2007 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2009 setPackageName :: String -> DynFlags -> DynFlags
2011 | Nothing <- unpackPackageId pid
2012 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2014 = \s -> s{ thisPackage = pid }
2016 pid = stringToPackageId p
2018 -- If we're linking a binary, then only targets that produce object
2019 -- code are allowed (requests for other target types are ignored).
2020 setTarget :: HscTarget -> DynP ()
2021 setTarget l = upd set
2024 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2027 -- Changes the target only if we're compiling object code. This is
2028 -- used by -fasm and -fvia-C, which switch from one to the other, but
2029 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2030 -- can be safely used in an OPTIONS_GHC pragma.
2031 setObjTarget :: HscTarget -> DynP ()
2032 setObjTarget l = upd set
2035 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2038 setOptLevel :: Int -> DynFlags -> DynFlags
2039 setOptLevel n dflags
2040 | hscTarget dflags == HscInterpreted && n > 0
2042 -- not in IO any more, oh well:
2043 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2045 = updOptLevel n dflags
2048 -- -Odph is equivalent to
2050 -- -O2 optimise as much as possible
2051 -- -fno-method-sharing sharing specialisation defeats fusion
2053 -- -fdicts-cheap always inline dictionaries
2054 -- -fmax-simplifier-iterations20 this is necessary sometimes
2055 -- -fsimplifier-phases=3 we use an additional simplifier phase
2057 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2058 -- -fno-spec-constr-count SpecConstr as much as possible
2059 -- -finline-enough-args hack to prevent excessive inlining
2061 setDPHOpt :: DynFlags -> DynFlags
2062 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2064 , specConstrThreshold = Nothing
2065 , specConstrCount = Nothing
2067 `dopt_set` Opt_DictsCheap
2068 `dopt_unset` Opt_MethodSharing
2069 `dopt_set` Opt_InlineIfEnoughArgs
2071 data DPHBackend = DPHPar
2074 deriving(Eq, Ord, Enum, Show)
2076 setDPHBackend :: DPHBackend -> DynP ()
2077 setDPHBackend backend
2079 upd $ \dflags -> dflags { dphBackend = backend }
2080 mapM_ exposePackage (dph_packages backend)
2082 dph_packages DPHThis = []
2083 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2084 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2086 dphPackage :: DynFlags -> PackageId
2087 dphPackage dflags = case dphBackend dflags of
2088 DPHPar -> dphParPackageId
2089 DPHSeq -> dphSeqPackageId
2090 DPHThis -> thisPackage dflags
2092 setMainIs :: String -> DynP ()
2094 | not (null main_fn) && isLower (head main_fn)
2095 -- The arg looked like "Foo.Bar.baz"
2096 = upd $ \d -> d{ mainFunIs = Just main_fn,
2097 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2099 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2100 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2102 | otherwise -- The arg looked like "baz"
2103 = upd $ \d -> d{ mainFunIs = Just arg }
2105 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2107 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
2108 -- Either returns the default name or the one configured on the command line with -main-is
2109 getMainFun :: DynFlags -> RdrName
2110 getMainFun dflags = case (mainFunIs dflags) of
2111 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
2112 Nothing -> main_RDR_Unqual
2114 -----------------------------------------------------------------------------
2115 -- Paths & Libraries
2117 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2119 -- -i on its own deletes the import paths
2120 addImportPath "" = upd (\s -> s{importPaths = []})
2121 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2125 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2128 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2130 addFrameworkPath p =
2131 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2133 #ifndef mingw32_TARGET_OS
2134 split_marker :: Char
2135 split_marker = ':' -- not configurable (ToDo)
2138 splitPathList :: String -> [String]
2139 splitPathList s = filter notNull (splitUp s)
2140 -- empty paths are ignored: there might be a trailing
2141 -- ':' in the initial list, for example. Empty paths can
2142 -- cause confusion when they are translated into -I options
2143 -- for passing to gcc.
2145 #ifndef mingw32_TARGET_OS
2146 splitUp xs = split split_marker xs
2148 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2150 -- That is, if "foo:bar:baz" is used, this interpreted as
2151 -- consisting of three entries, 'foo', 'bar', 'baz'.
2152 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2153 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2155 -- Notice that no attempt is made to fully replace the 'standard'
2156 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2157 -- that this will cause too much breakage for users & ':' will
2158 -- work fine even with DOS paths, if you're not insisting on being silly.
2161 splitUp (x:':':div:xs) | div `elem` dir_markers
2162 = ((x:':':div:p): splitUp rs)
2164 (p,rs) = findNextPath xs
2165 -- we used to check for existence of the path here, but that
2166 -- required the IO monad to be threaded through the command-line
2167 -- parser which is quite inconvenient. The
2168 splitUp xs = cons p (splitUp rs)
2170 (p,rs) = findNextPath xs
2175 -- will be called either when we've consumed nought or the
2176 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2177 -- finding the next split marker.
2179 case break (`elem` split_markers) xs of
2180 (p, _:ds) -> (p, ds)
2183 split_markers :: [Char]
2184 split_markers = [':', ';']
2186 dir_markers :: [Char]
2187 dir_markers = ['/', '\\']
2190 -- -----------------------------------------------------------------------------
2191 -- tmpDir, where we store temporary files.
2193 setTmpDir :: FilePath -> DynFlags -> DynFlags
2194 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2195 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2196 -- seem necessary now --SDM 7/2/2008
2198 -----------------------------------------------------------------------------
2201 setOptHpcDir :: String -> DynP ()
2202 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2204 -----------------------------------------------------------------------------
2205 -- Via-C compilation stuff
2207 -- There are some options that we need to pass to gcc when compiling
2208 -- Haskell code via C, but are only supported by recent versions of
2209 -- gcc. The configure script decides which of these options we need,
2210 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2211 -- read before each via-C compilation. The advantage of having these
2212 -- in a separate file is that the file can be created at install-time
2213 -- depending on the available gcc version, and even re-generated later
2214 -- if gcc is upgraded.
2216 -- The options below are not dependent on the version of gcc, only the
2219 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2220 [String]) -- for registerised HC compilations
2221 machdepCCOpts _dflags
2222 #if alpha_TARGET_ARCH
2224 #ifdef HAVE_THREADED_RTS_SUPPORT
2228 -- For now, to suppress the gcc warning "call-clobbered
2229 -- register used for global register variable", we simply
2230 -- disable all warnings altogether using the -w flag. Oh well.
2232 #elif hppa_TARGET_ARCH
2233 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2234 -- (very nice, but too bad the HP /usr/include files don't agree.)
2235 = ( ["-D_HPUX_SOURCE"], [] )
2237 #elif m68k_TARGET_ARCH
2238 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2239 -- popping of args to routines to be explicit; if we let things
2240 -- be deferred 'til after an STGJUMP, imminent death is certain!
2242 -- -fomit-frame-pointer : *don't*
2243 -- It's better to have a6 completely tied up being a frame pointer
2244 -- rather than let GCC pick random things to do with it.
2245 -- (If we want to steal a6, then we would try to do things
2246 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2247 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2249 #elif i386_TARGET_ARCH
2250 -- -fno-defer-pop : basically the same game as for m68k
2252 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2253 -- the fp (%ebp) for our register maps.
2254 = let n_regs = stolen_x86_regs _dflags
2257 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2260 "-fomit-frame-pointer",
2261 -- we want -fno-builtin, because when gcc inlines
2262 -- built-in functions like memcpy() it tends to
2263 -- run out of registers, requiring -monly-n-regs
2265 "-DSTOLEN_X86_REGS="++show n_regs ]
2268 #elif ia64_TARGET_ARCH
2269 = ( [], ["-fomit-frame-pointer", "-G0"] )
2271 #elif x86_64_TARGET_ARCH
2273 #if darwin_TARGET_OS
2278 ["-fomit-frame-pointer",
2279 "-fno-asynchronous-unwind-tables",
2280 -- the unwind tables are unnecessary for HC code,
2281 -- and get in the way of -split-objs. Another option
2282 -- would be to throw them away in the mangler, but this
2285 -- calling builtins like strlen() using the FFI can
2286 -- cause gcc to run out of regs, so use the external
2290 #elif sparc_TARGET_ARCH
2292 -- For now, to suppress the gcc warning "call-clobbered
2293 -- register used for global register variable", we simply
2294 -- disable all warnings altogether using the -w flag. Oh well.
2296 #elif powerpc_apple_darwin_TARGET
2298 -- Disable Apple's precompiling preprocessor. It's a great thing
2299 -- for "normal" programs, but it doesn't support register variable
2301 = ( [], ["-no-cpp-precomp"] )
2306 picCCOpts :: DynFlags -> [String]
2308 #if darwin_TARGET_OS
2309 -- Apple prefers to do things the other way round.
2310 -- PIC is on by default.
2311 -- -mdynamic-no-pic:
2312 -- Turn off PIC code generation.
2314 -- Don't generate "common" symbols - these are unwanted
2315 -- in dynamic libraries.
2318 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2320 = ["-mdynamic-no-pic"]
2321 #elif mingw32_TARGET_OS
2322 -- no -fPIC for Windows
2324 = ["-U __PIC__","-D__PIC__"]
2328 | opt_PIC || not opt_Static
2329 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2334 -- -----------------------------------------------------------------------------
2338 can_split = cSplitObjs == "YES"
2340 -- -----------------------------------------------------------------------------
2343 compilerInfo :: [(String, String)]
2344 compilerInfo = [("Project name", cProjectName),
2345 ("Project version", cProjectVersion),
2346 ("Booter version", cBooterVersion),
2348 ("Interface file version", cHscIfaceFileVersion),
2349 ("Have interpreter", cGhcWithInterpreter),
2350 ("Object splitting", cSplitObjs),
2351 ("Have native code generator", cGhcWithNativeCodeGen),
2352 ("Support SMP", cGhcWithSMP),
2353 ("Unregisterised", cGhcUnregisterised),
2354 ("Tables next to code", cGhcEnableTablesNextToCode),
2355 ("Win32 DLLs", cEnableWin32DLLs),
2356 ("RTS ways", cGhcRTSWays),
2357 ("Leading underscore", cLeadingUnderscore),
2358 ("Debug on", show debugIsOn)