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,
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]
39 -- ** Parsing DynFlags
41 parseDynamicNoPackageFlags,
44 supportedLanguages, languageOptions,
46 -- ** DynFlag C compiler options
47 machdepCCOpts, picCCOpts,
49 -- * Configuration of the stg-to-stg passes
53 -- * Compiler configuration suitable for display to the user
58 #include "HsVersions.h"
60 #ifndef OMIT_NATIVE_CODEGEN
65 import PrelNames ( mAIN )
67 import {-# SOURCE #-} Packages (PackageState)
68 import DriverPhases ( Phase(..), phaseInputExt )
71 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
74 import Maybes ( orElse )
79 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
82 import Control.Monad ( when )
86 import System.FilePath
87 import System.IO ( stderr, hPutChar )
89 -- -----------------------------------------------------------------------------
92 -- | Enumerates the simple on-or-off dynamic flags
98 | Opt_D_dump_cmmz_pretty
102 | Opt_D_dump_asm_native
103 | Opt_D_dump_asm_liveness
104 | Opt_D_dump_asm_coalesce
105 | Opt_D_dump_asm_regalloc
106 | Opt_D_dump_asm_regalloc_stages
107 | Opt_D_dump_asm_conflicts
108 | Opt_D_dump_asm_stats
109 | Opt_D_dump_asm_expanded
115 | Opt_D_dump_inlinings
116 | Opt_D_dump_rule_firings
117 | Opt_D_dump_occur_anal
121 | Opt_D_dump_simpl_iterations
122 | Opt_D_dump_simpl_phases
131 | Opt_D_dump_worker_wrapper
132 | Opt_D_dump_rn_trace
133 | Opt_D_dump_rn_stats
135 | Opt_D_dump_simpl_stats
136 | Opt_D_dump_tc_trace
137 | Opt_D_dump_if_trace
144 | Opt_D_verbose_core2core
145 | Opt_D_verbose_stg2stg
147 | Opt_D_dump_hi_diffs
148 | Opt_D_dump_minimal_imports
149 | Opt_D_dump_mod_cycles
150 | Opt_D_dump_view_pattern_commoning
151 | Opt_D_faststring_stats
152 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
153 | Opt_D_no_debug_output
159 | Opt_WarnIsError -- -Werror; makes warnings fatal
160 | Opt_WarnDuplicateExports
162 | Opt_WarnImplicitPrelude
163 | Opt_WarnIncompletePatterns
164 | Opt_WarnIncompletePatternsRecUpd
165 | Opt_WarnMissingFields
166 | Opt_WarnMissingMethods
167 | Opt_WarnMissingSigs
168 | Opt_WarnNameShadowing
169 | Opt_WarnOverlappingPatterns
170 | Opt_WarnSimplePatterns
171 | Opt_WarnTypeDefaults
172 | Opt_WarnMonomorphism
173 | Opt_WarnUnusedBinds
174 | Opt_WarnUnusedImports
175 | Opt_WarnUnusedMatches
176 | Opt_WarnWarningsDeprecations
177 | Opt_WarnDeprecatedFlags
178 | Opt_WarnDodgyExports
179 | Opt_WarnDodgyImports
182 | Opt_WarnUnrecognisedPragmas
183 | Opt_WarnDodgyForeignImports
184 | Opt_WarnLazyUnliftedBindings
185 | Opt_WarnUnusedDoBind
186 | Opt_WarnWrongDoBind
187 | Opt_WarnAlternativeLayoutRuleTransitional
191 | Opt_OverlappingInstances
192 | Opt_UndecidableInstances
193 | Opt_IncoherentInstances
194 | Opt_MonomorphismRestriction
197 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
198 | Opt_ForeignFunctionInterface
199 | Opt_UnliftedFFITypes
200 | Opt_GHCForeignImportPrim
201 | Opt_PArr -- Syntactic support for parallel arrays
202 | Opt_Arrows -- Arrow-notation syntax
203 | Opt_TemplateHaskell
206 | Opt_Generics -- "Derivable type classes"
207 | Opt_ImplicitPrelude
208 | Opt_ScopedTypeVariables
212 | Opt_OverloadedStrings
213 | Opt_DisambiguateRecordFields
214 | Opt_RecordWildCards
221 | Opt_StandaloneDeriving
222 | Opt_DeriveDataTypeable
224 | Opt_DeriveTraversable
227 | Opt_TypeSynonymInstances
228 | Opt_FlexibleContexts
229 | Opt_FlexibleInstances
230 | Opt_ConstrainedClassMethods
231 | Opt_MultiParamTypeClasses
232 | Opt_FunctionalDependencies
234 | Opt_PolymorphicComponents
235 | Opt_ExistentialQuantification
239 | Opt_ParallelListComp
240 | Opt_TransformListComp
241 | Opt_GeneralizedNewtypeDeriving
244 | Opt_PostfixOperators
247 | Opt_LiberalTypeSynonyms
250 | Opt_ImpredicativeTypes
253 | Opt_NewQualifiedOperators
255 | Opt_AlternativeLayoutRule
256 | Opt_AlternativeLayoutRuleTransitional
258 | Opt_PrintExplicitForalls
265 | Opt_StaticArgumentTransformation
269 | Opt_DoLambdaEtaExpansion
273 | Opt_UnboxStrictFields
276 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
278 | Opt_RegsGraph -- do graph coloring register allocation
279 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
282 | Opt_IgnoreInterfacePragmas
283 | Opt_OmitInterfacePragmas
284 | Opt_ExposeAllUnfoldings
287 | Opt_AutoSccsOnAllToplevs
288 | Opt_AutoSccsOnExportedToplevs
289 | Opt_AutoSccsOnIndividualCafs
297 | Opt_ExcessPrecision
298 | Opt_EagerBlackHoling
299 | Opt_ReadUserPackageConf
304 | Opt_HideAllPackages
305 | Opt_PrintBindResult
309 | Opt_BreakOnException
311 | Opt_PrintEvldWithShow
312 | Opt_PrintBindContents
315 | Opt_EmitExternalCore
317 | Opt_BuildingCabalPackage
323 | Opt_ConvertToZipCfgAndBack
324 | Opt_AutoLinkPackages
325 | Opt_ImplicitImportQualified
334 | Opt_KeepRawTokenStream
338 -- | Contains not only a collection of 'DynFlag's but also a plethora of
339 -- information relating to the compilation of a single file or GHC session
340 data DynFlags = DynFlags {
343 hscTarget :: HscTarget,
344 hscOutName :: String, -- ^ Name of the output file
345 extCoreName :: String, -- ^ Name of the .hcr output file
346 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
347 optLevel :: Int, -- ^ Optimisation level
348 simplPhases :: Int, -- ^ Number of simplifier phases
349 maxSimplIterations :: Int, -- ^ Max simplifier iterations
350 shouldDumpSimplPhase :: Maybe String,
351 ruleCheck :: Maybe String,
352 strictnessBefore :: [Int], -- ^ Additional demand analysis
354 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
355 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
356 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
358 #ifndef OMIT_NATIVE_CODEGEN
359 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
361 stolen_x86_regs :: Int,
362 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
363 importPaths :: [FilePath],
365 mainFunIs :: Maybe String,
366 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
368 dphBackend :: DPHBackend,
370 thisPackage :: PackageId, -- ^ name of package currently being compiled
373 ways :: [Way], -- ^ Way flags from the command line
374 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
375 rtsBuildTag :: String, -- ^ The RTS \"way\"
377 -- For object splitting
378 splitInfo :: Maybe (String,Int),
381 objectDir :: Maybe String,
382 dylibInstallName :: Maybe String,
383 hiDir :: Maybe String,
384 stubDir :: Maybe String,
390 outputFile :: Maybe String,
391 outputHi :: Maybe String,
392 dynLibLoader :: DynLibLoader,
394 -- | This is set by 'DriverPipeline.runPipeline' based on where
395 -- its output is going.
396 dumpPrefix :: Maybe FilePath,
398 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
399 -- Set by @-ddump-file-prefix@
400 dumpPrefixForce :: Maybe FilePath,
402 includePaths :: [String],
403 libraryPaths :: [String],
404 frameworkPaths :: [String], -- used on darwin only
405 cmdlineFrameworks :: [String], -- ditto
406 tmpDir :: String, -- no trailing '/'
408 ghcUsagePath :: FilePath, -- Filled in by SysTools
409 ghciUsagePath :: FilePath, -- ditto
411 hpcDir :: String, -- ^ Path to store the .mix files
413 -- options for particular phases
421 opt_windres :: [String],
423 -- commands for particular phases
425 pgm_P :: (String,[Option]),
427 pgm_c :: (String,[Option]),
428 pgm_m :: (String,[Option]),
429 pgm_s :: (String,[Option]),
430 pgm_a :: (String,[Option]),
431 pgm_l :: (String,[Option]),
432 pgm_dll :: (String,[Option]),
434 pgm_sysman :: String,
435 pgm_windres :: String,
438 depMakefile :: FilePath,
439 depIncludePkgDeps :: Bool,
440 depExcludeMods :: [ModuleName],
441 depSuffixes :: [String],
444 extraPkgConfs :: [FilePath],
445 topDir :: FilePath, -- filled in by SysTools
446 systemPackageConfig :: FilePath, -- ditto
447 -- ^ The @-package-conf@ flags given on the command line, in the order
450 packageFlags :: [PackageFlag],
451 -- ^ The @-package@ and @-hide-package@ flags from the command-line
454 -- NB. do not modify this field, it is calculated by
455 -- Packages.initPackages and Packages.updatePackages.
456 pkgDatabase :: Maybe [PackageConfig],
457 pkgState :: PackageState,
460 -- These have to be IORefs, because the defaultCleanupHandler needs to
461 -- know what to clean when an exception happens
462 filesToClean :: IORef [FilePath],
463 dirsToClean :: IORef (FiniteMap FilePath FilePath),
468 -- | Message output action: use "ErrUtils" instead of this if you can
469 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
471 haddockOptions :: Maybe String
474 wayNames :: DynFlags -> [WayName]
475 wayNames = map wayName . ways
477 -- | The target code type of the compilation (if any).
479 -- Whenever you change the target, also make sure to set 'ghcLink' to
480 -- something sensible.
482 -- 'HscNothing' can be used to avoid generating any output, however, note
485 -- * This will not run the desugaring step, thus no warnings generated in
486 -- this step will be output. In particular, this includes warnings related
487 -- to pattern matching. You can run the desugarer manually using
488 -- 'GHC.desugarModule'.
490 -- * If a program uses Template Haskell the typechecker may try to run code
491 -- from an imported module. This will fail if no code has been generated
492 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
493 -- whether this might be the case and choose to either switch to a
494 -- different target or avoid typechecking such modules. (The latter may
495 -- preferable for security reasons.)
498 = HscC -- ^ Generate C code.
499 | HscAsm -- ^ Generate assembly using the native code generator.
500 | HscJava -- ^ Generate Java bytecode.
501 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
502 | HscNothing -- ^ Don't generate any code. See notes above.
505 -- | Will this target result in an object file on the disk?
506 isObjectTarget :: HscTarget -> Bool
507 isObjectTarget HscC = True
508 isObjectTarget HscAsm = True
509 isObjectTarget _ = False
511 -- | The 'GhcMode' tells us whether we're doing multi-module
512 -- compilation (controlled via the "GHC" API) or one-shot
513 -- (single-module) compilation. This makes a difference primarily to
514 -- the "Finder": in one-shot mode we look for interface files for
515 -- imported modules, but in multi-module mode we look for source files
516 -- in order to check whether they need to be recompiled.
518 = CompManager -- ^ @\-\-make@, GHCi, etc.
519 | OneShot -- ^ @ghc -c Foo.hs@
520 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
523 instance Outputable GhcMode where
524 ppr CompManager = ptext (sLit "CompManager")
525 ppr OneShot = ptext (sLit "OneShot")
526 ppr MkDepend = ptext (sLit "MkDepend")
528 isOneShot :: GhcMode -> Bool
529 isOneShot OneShot = True
530 isOneShot _other = False
532 -- | What to do in the link step, if there is one.
534 = NoLink -- ^ Don't link at all
535 | LinkBinary -- ^ Link object code into a binary
536 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
537 -- bytecode and object code).
538 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
541 isNoLink :: GhcLink -> Bool
542 isNoLink NoLink = True
545 -- Is it worth evaluating this Bool and caching it in the DynFlags value
546 -- during initDynFlags?
547 doingTickyProfiling :: DynFlags -> Bool
548 doingTickyProfiling _ = opt_Ticky
549 -- XXX -ticky is a static flag, because it implies -debug which is also
550 -- static. If the way flags were made dynamic, we could fix this.
553 = ExposePackage String
554 | ExposePackageId String
556 | IgnorePackage String
559 defaultHscTarget :: HscTarget
560 defaultHscTarget = defaultObjectTarget
562 -- | The 'HscTarget' value corresponding to the default way to create
563 -- object files on the current platform.
564 defaultObjectTarget :: HscTarget
566 | cGhcWithNativeCodeGen == "YES" = HscAsm
571 | Wrapped (Maybe String)
575 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
576 initDynFlags :: DynFlags -> IO DynFlags
577 initDynFlags dflags = do
578 -- someday these will be dynamic flags
579 ways <- readIORef v_Ways
580 refFilesToClean <- newIORef []
581 refDirsToClean <- newIORef emptyFM
584 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
585 rtsBuildTag = mkBuildTag ways,
586 filesToClean = refFilesToClean,
587 dirsToClean = refDirsToClean
590 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
591 -- and must be fully initialized by 'GHC.newSession' first.
592 defaultDynFlags :: DynFlags
595 ghcMode = CompManager,
596 ghcLink = LinkBinary,
597 hscTarget = defaultHscTarget,
603 maxSimplIterations = 4,
604 shouldDumpSimplPhase = Nothing,
606 specConstrThreshold = Just 200,
607 specConstrCount = Just 3,
608 liberateCaseThreshold = Just 200,
609 strictnessBefore = [],
611 #ifndef OMIT_NATIVE_CODEGEN
612 targetPlatform = defaultTargetPlatform,
615 cmdlineHcIncludes = [],
619 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
623 thisPackage = mainPackageId,
626 dylibInstallName = Nothing,
630 objectSuf = phaseInputExt StopLn,
631 hcSuf = phaseInputExt HCc,
634 outputFile = Nothing,
636 dynLibLoader = SystemDependent,
637 dumpPrefix = Nothing,
638 dumpPrefixForce = Nothing,
642 cmdlineFrameworks = [],
643 tmpDir = cDEFAULT_TMPDIR,
649 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
660 pkgDatabase = Nothing,
661 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
662 ways = panic "defaultDynFlags: No ways",
663 buildTag = panic "defaultDynFlags: No buildTag",
664 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
666 -- initSysTools fills all these in
667 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
668 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
669 topDir = panic "defaultDynFlags: No topDir",
670 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
671 pgm_L = panic "defaultDynFlags: No pgm_L",
672 pgm_P = panic "defaultDynFlags: No pgm_P",
673 pgm_F = panic "defaultDynFlags: No pgm_F",
674 pgm_c = panic "defaultDynFlags: No pgm_c",
675 pgm_m = panic "defaultDynFlags: No pgm_m",
676 pgm_s = panic "defaultDynFlags: No pgm_s",
677 pgm_a = panic "defaultDynFlags: No pgm_a",
678 pgm_l = panic "defaultDynFlags: No pgm_l",
679 pgm_dll = panic "defaultDynFlags: No pgm_dll",
680 pgm_T = panic "defaultDynFlags: No pgm_T",
681 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
682 pgm_windres = panic "defaultDynFlags: No pgm_windres",
683 -- end of initSysTools values
685 depMakefile = "Makefile",
686 depIncludePkgDeps = False,
689 -- end of ghc -M values
690 filesToClean = panic "defaultDynFlags: No filesToClean",
691 dirsToClean = panic "defaultDynFlags: No dirsToClean",
692 haddockOptions = Nothing,
695 Opt_AutoLinkPackages,
696 Opt_ReadUserPackageConf,
698 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
699 -- behaviour the default, to see if anyone notices
703 Opt_MonomorphismRestriction,
714 Opt_PrintBindContents
716 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
717 -- The default -O0 options
720 log_action = \severity srcSpan style msg ->
722 SevInfo -> printErrs (msg style)
723 SevFatal -> printErrs (msg style)
726 printErrs ((mkLocMessage srcSpan msg) style)
727 -- careful (#2302): printErrs prints in UTF-8, whereas
728 -- converting to string first and using hPutStr would
729 -- just emit the low 8 bits of each unicode char.
733 Note [Verbosity levels]
734 ~~~~~~~~~~~~~~~~~~~~~~~
735 0 | print errors & warnings only
736 1 | minimal verbosity: print "compiling M ... done." for each module.
737 2 | equivalent to -dshow-passes
738 3 | equivalent to existing "ghc -v"
739 4 | "ghc -v -ddump-most"
740 5 | "ghc -v -ddump-all"
743 -- | Test whether a 'DynFlag' is set
744 dopt :: DynFlag -> DynFlags -> Bool
745 dopt f dflags = f `elem` (flags dflags)
748 dopt_set :: DynFlags -> DynFlag -> DynFlags
749 dopt_set dfs f = dfs{ flags = f : flags dfs }
751 -- | Unset a 'DynFlag'
752 dopt_unset :: DynFlags -> DynFlag -> DynFlags
753 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
755 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
756 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
757 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
758 -> [a] -- ^ Correctly ordered extracted options
759 getOpts dflags opts = reverse (opts dflags)
760 -- We add to the options from the front, so we need to reverse the list
762 -- | Gets the verbosity flag for the current verbosity level. This is fed to
763 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
764 getVerbFlag :: DynFlags -> String
766 | verbosity dflags >= 3 = "-v"
769 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
770 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
771 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
772 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
773 addCmdlineFramework, addHaddockOpts
774 :: String -> DynFlags -> DynFlags
775 setOutputFile, setOutputHi, setDumpPrefixForce
776 :: Maybe String -> DynFlags -> DynFlags
778 setObjectDir f d = d{ objectDir = Just f}
779 setHiDir f d = d{ hiDir = Just f}
780 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
781 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
782 -- \#included from the .hc file when compiling with -fvia-C.
783 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
784 setDylibInstallName f d = d{ dylibInstallName = Just f}
786 setObjectSuf f d = d{ objectSuf = f}
787 setHiSuf f d = d{ hiSuf = f}
788 setHcSuf f d = d{ hcSuf = f}
790 setOutputFile f d = d{ outputFile = f}
791 setOutputHi f d = d{ outputHi = f}
793 parseDynLibLoaderMode f d =
795 ("deploy", "") -> d{ dynLibLoader = Deployable }
796 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
797 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
798 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
799 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
800 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
802 setDumpPrefixForce f d = d { dumpPrefixForce = f}
804 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
805 -- Config.hs should really use Option.
806 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
808 setPgmL f d = d{ pgm_L = f}
809 setPgmF f d = d{ pgm_F = f}
810 setPgmc f d = d{ pgm_c = (f,[])}
811 setPgmm f d = d{ pgm_m = (f,[])}
812 setPgms f d = d{ pgm_s = (f,[])}
813 setPgma f d = d{ pgm_a = (f,[])}
814 setPgml f d = d{ pgm_l = (f,[])}
815 setPgmdll f d = d{ pgm_dll = (f,[])}
816 setPgmwindres f d = d{ pgm_windres = f}
818 addOptL f d = d{ opt_L = f : opt_L d}
819 addOptP f d = d{ opt_P = f : opt_P d}
820 addOptF f d = d{ opt_F = f : opt_F d}
821 addOptc f d = d{ opt_c = f : opt_c d}
822 addOptm f d = d{ opt_m = f : opt_m d}
823 addOpta f d = d{ opt_a = f : opt_a d}
824 addOptl f d = d{ opt_l = f : opt_l d}
825 addOptwindres f d = d{ opt_windres = f : opt_windres d}
827 setDepMakefile :: FilePath -> DynFlags -> DynFlags
828 setDepMakefile f d = d { depMakefile = deOptDep f }
830 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
831 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
833 addDepExcludeMod :: String -> DynFlags -> DynFlags
835 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
837 addDepSuffix :: FilePath -> DynFlags -> DynFlags
838 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
841 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
842 -- we need to strip the "-optdep" off of the arg
843 deOptDep :: String -> String
844 deOptDep x = case stripPrefix "-optdep" x of
848 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
850 addHaddockOpts f d = d{ haddockOptions = Just f}
852 -- -----------------------------------------------------------------------------
853 -- Command-line options
855 -- | When invoking external tools as part of the compilation pipeline, we
856 -- pass these a sequence of options on the command-line. Rather than
857 -- just using a list of Strings, we use a type that allows us to distinguish
858 -- between filepaths and 'other stuff'. The reason for this is that
859 -- this type gives us a handle on transforming filenames, and filenames only,
860 -- to whatever format they're expected to be on a particular platform.
862 = FileOption -- an entry that _contains_ filename(s) / filepaths.
863 String -- a non-filepath prefix that shouldn't be
864 -- transformed (e.g., "/out=")
865 String -- the filepath/filename portion
868 showOpt :: Option -> String
869 showOpt (FileOption pre f) = pre ++ f
870 showOpt (Option s) = s
872 -----------------------------------------------------------------------------
873 -- Setting the optimisation level
875 updOptLevel :: Int -> DynFlags -> DynFlags
876 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
878 = dfs2{ optLevel = final_n }
880 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
881 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
882 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
884 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
885 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
887 optLevelFlags :: [([Int], DynFlag)]
889 = [ ([0], Opt_IgnoreInterfacePragmas)
890 , ([0], Opt_OmitInterfacePragmas)
892 , ([1,2], Opt_IgnoreAsserts)
893 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
895 , ([1,2], Opt_DoEtaReduction)
896 , ([1,2], Opt_CaseMerge)
897 , ([1,2], Opt_Strictness)
899 , ([1,2], Opt_FullLaziness)
900 , ([1,2], Opt_Specialise)
901 , ([1,2], Opt_FloatIn)
903 , ([2], Opt_LiberateCase)
904 , ([2], Opt_SpecConstr)
906 -- , ([2], Opt_StaticArgumentTransformation)
907 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
908 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
909 -- several improvements to the heuristics, and I'm concerned that without
910 -- those changes SAT will interfere with some attempts to write "high
911 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
912 -- this year. In particular, the version in HEAD lacks the tail call
913 -- criterion, so many things that look like reasonable loops will be
914 -- turned into functions with extra (unneccesary) thunk creation.
916 , ([0,1,2], Opt_DoLambdaEtaExpansion)
917 -- This one is important for a tiresome reason:
918 -- we want to make sure that the bindings for data
919 -- constructors are eta-expanded. This is probably
920 -- a good thing anyway, but it seems fragile.
923 -- -----------------------------------------------------------------------------
924 -- Standard sets of warning options
926 standardWarnings :: [DynFlag]
928 = [ Opt_WarnWarningsDeprecations,
929 Opt_WarnDeprecatedFlags,
930 Opt_WarnUnrecognisedPragmas,
931 Opt_WarnOverlappingPatterns,
932 Opt_WarnMissingFields,
933 Opt_WarnMissingMethods,
934 Opt_WarnDuplicateExports,
935 Opt_WarnLazyUnliftedBindings,
936 Opt_WarnDodgyForeignImports,
938 Opt_WarnAlternativeLayoutRuleTransitional
941 minusWOpts :: [DynFlag]
943 = standardWarnings ++
944 [ Opt_WarnUnusedBinds,
945 Opt_WarnUnusedMatches,
946 Opt_WarnUnusedImports,
947 Opt_WarnIncompletePatterns,
948 Opt_WarnDodgyExports,
952 minusWallOpts :: [DynFlag]
955 [ Opt_WarnTypeDefaults,
956 Opt_WarnNameShadowing,
963 -- minuswRemovesOpts should be every warning option
964 minuswRemovesOpts :: [DynFlag]
967 [Opt_WarnImplicitPrelude,
968 Opt_WarnIncompletePatternsRecUpd,
969 Opt_WarnSimplePatterns,
970 Opt_WarnMonomorphism,
971 Opt_WarnUnrecognisedPragmas,
975 -- -----------------------------------------------------------------------------
976 -- StgToDo: abstraction of stg-to-stg passes to run.
979 = StgDoMassageForProfiling -- should be (next to) last
980 -- There's also setStgVarInfo, but its absolute "lastness"
981 -- is so critical that it is hardwired in (no flag).
984 getStgToDo :: DynFlags -> [StgToDo]
988 stg_stats = dopt Opt_StgStats dflags
990 todo1 = if stg_stats then [D_stg_stats] else []
992 todo2 | WayProf `elem` wayNames dflags
993 = StgDoMassageForProfiling : todo1
997 -- -----------------------------------------------------------------------------
1000 allFlags :: [String]
1001 allFlags = map ('-':) $
1002 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1003 map ("fno-"++) flags ++
1004 map ("f"++) flags ++
1005 map ("X"++) supportedLanguages ++
1006 map ("XNo"++) supportedLanguages
1007 where ok (PrefixPred _ _) = False
1009 flags = [ name | (name, _, _) <- fFlags ]
1011 dynamic_flags :: [Flag DynP]
1013 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1014 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1015 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1016 , Flag "#include" (HasArg (addCmdlineHCInclude))
1017 (Deprecated "No longer has any effect")
1018 , Flag "v" (OptIntSuffix setVerbosity) Supported
1020 ------- Specific phases --------------------------------------------
1021 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1022 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1023 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1024 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1025 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1026 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1027 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1028 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1029 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1030 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1032 , Flag "optL" (HasArg (upd . addOptL)) Supported
1033 , Flag "optP" (HasArg (upd . addOptP)) Supported
1034 , Flag "optF" (HasArg (upd . addOptF)) Supported
1035 , Flag "optc" (HasArg (upd . addOptc)) Supported
1036 , Flag "optm" (HasArg (upd . addOptm)) Supported
1037 , Flag "opta" (HasArg (upd . addOpta)) Supported
1038 , Flag "optl" (HasArg (upd . addOptl)) Supported
1039 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1042 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1045 -------- ghc -M -----------------------------------------------------
1046 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1047 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1048 (Deprecated "Use -dep-suffix instead")
1049 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1050 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1051 (Deprecated "Use -dep-makefile instead")
1052 , Flag "optdep-w" (NoArg (return ()))
1053 (Deprecated "-optdep-w doesn't do anything")
1054 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1055 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1056 (Deprecated "Use -include-pkg-deps instead")
1057 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1058 (Deprecated "Use -include-pkg-deps instead")
1059 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1060 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1061 (Deprecated "Use -exclude-module instead")
1062 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1063 (Deprecated "Use -exclude-module instead")
1065 -------- Linking ----------------------------------------------------
1066 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1068 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1069 (Deprecated "Use -c instead")
1070 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1072 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1074 , Flag "dylib-install-name" (HasArg (upd . setDylibInstallName)) Supported
1076 ------- Libraries ---------------------------------------------------
1077 , Flag "L" (Prefix addLibraryPath ) Supported
1078 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1080 ------- Frameworks --------------------------------------------------
1081 -- -framework-path should really be -F ...
1082 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1083 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1085 ------- Output Redirection ------------------------------------------
1086 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1087 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1088 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1089 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1090 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1091 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1092 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1093 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1094 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1095 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1096 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1099 ------- Keeping temporary files -------------------------------------
1100 -- These can be singular (think ghc -c) or plural (think ghc --make)
1101 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1102 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1103 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1104 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1105 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1106 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1107 -- This only makes sense as plural
1108 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1110 ------- Miscellaneous ----------------------------------------------
1111 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1112 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1113 , Flag "rtsopts" (NoArg (setDynFlag Opt_RtsOptsEnabled)) Supported
1114 , Flag "no-rtsopts" (NoArg (unSetDynFlag Opt_RtsOptsEnabled)) Supported
1115 , Flag "main-is" (SepArg setMainIs ) Supported
1116 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1117 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1118 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1120 ------- recompilation checker --------------------------------------
1121 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1122 (Deprecated "Use -fno-force-recomp instead")
1123 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1124 (Deprecated "Use -fforce-recomp instead")
1126 ------ HsCpp opts ---------------------------------------------------
1127 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1128 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1130 ------- Include/Import Paths ----------------------------------------
1131 , Flag "I" (Prefix addIncludePath) Supported
1132 , Flag "i" (OptPrefix addImportPath ) Supported
1134 ------ Debugging ----------------------------------------------------
1135 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1137 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1139 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1141 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1143 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1145 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1147 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1149 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1151 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1153 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1155 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1157 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1159 , Flag "ddump-asm-regalloc-stages"
1160 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1162 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1164 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1166 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1168 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1170 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1172 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1174 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1176 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1178 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1180 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1182 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1184 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1186 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1188 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1190 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1192 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1194 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1196 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1198 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1200 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1202 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1204 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1206 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1208 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1210 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1212 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1214 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1216 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1218 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1220 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1222 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1224 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1226 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1228 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1229 ; setVerboseCore2Core }))
1231 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1233 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1235 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1237 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1239 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1241 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1243 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1245 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1247 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1249 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1252 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1254 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1256 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1258 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1260 , Flag "dshow-passes"
1261 (NoArg (do forceRecompile
1262 setVerbosity (Just 2)))
1264 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1267 ------ Machine dependant (-m<blah>) stuff ---------------------------
1269 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1271 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1273 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1276 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1279 ------ Warning opts -------------------------------------------------
1280 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1282 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1284 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1286 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1288 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1289 (Deprecated "Use -w instead")
1290 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1293 ------ Optimisation flags ------------------------------------------
1294 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1295 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1296 (Deprecated "Use -O0 instead")
1297 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1298 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1300 -- If the number is missing, use 1
1302 , Flag "fsimplifier-phases"
1303 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1305 , Flag "fmax-simplifier-iterations"
1306 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1309 , Flag "fspec-constr-threshold"
1310 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1312 , Flag "fno-spec-constr-threshold"
1313 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1315 , Flag "fspec-constr-count"
1316 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1318 , Flag "fno-spec-constr-count"
1319 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1321 , Flag "fliberate-case-threshold"
1322 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1324 , Flag "fno-liberate-case-threshold"
1325 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1328 , Flag "frule-check"
1329 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1331 , Flag "fcontext-stack"
1332 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1335 , Flag "fstrictness-before"
1336 (IntSuffix (\n -> upd (\dfs -> dfs{ strictnessBefore = n : strictnessBefore dfs })))
1339 ------ Profiling ----------------------------------------------------
1341 -- XXX Should the -f* flags be deprecated?
1342 -- They don't seem to be documented
1343 , Flag "fauto-sccs-on-all-toplevs"
1344 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1347 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1349 , Flag "no-auto-all"
1350 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1352 , Flag "fauto-sccs-on-exported-toplevs"
1353 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1356 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1359 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1361 , Flag "fauto-sccs-on-individual-cafs"
1362 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1365 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1368 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1371 ------ DPH flags ----------------------------------------------------
1374 (NoArg (setDPHBackend DPHSeq))
1377 (NoArg (setDPHBackend DPHPar))
1380 (NoArg (setDPHBackend DPHThis))
1383 ------ Compiler flags -----------------------------------------------
1385 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1386 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1387 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1389 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1390 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1391 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1393 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1395 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1398 ++ map (mkFlag True "f" setDynFlag ) fFlags
1399 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1400 ++ map (mkFlag True "X" setDynFlag ) xFlags
1401 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1403 package_flags :: [Flag DynP]
1405 ------- Packages ----------------------------------------------------
1406 Flag "package-conf" (HasArg extraPkgConf_) Supported
1407 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1409 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1410 , Flag "package-id" (HasArg exposePackageId) Supported
1411 , Flag "package" (HasArg exposePackage) Supported
1412 , Flag "hide-package" (HasArg hidePackage) Supported
1413 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1415 , Flag "ignore-package" (HasArg ignorePackage)
1417 , Flag "syslib" (HasArg exposePackage)
1418 (Deprecated "Use -package instead")
1421 mkFlag :: Bool -- ^ True <=> it should be turned on
1422 -> String -- ^ The flag prefix
1423 -> (DynFlag -> DynP ())
1424 -> (String, DynFlag, Bool -> Deprecated)
1426 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1427 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1429 deprecatedForLanguage :: String -> Bool -> Deprecated
1430 deprecatedForLanguage lang turn_on
1431 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1433 flag | turn_on = lang
1434 | otherwise = "No"++lang
1436 useInstead :: String -> Bool -> Deprecated
1437 useInstead flag turn_on
1438 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1440 no = if turn_on then "" else "no-"
1442 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1443 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1445 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1446 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1447 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1448 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1449 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1450 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1451 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1452 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1453 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1454 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1455 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1456 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1457 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1458 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1459 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1460 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1461 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1462 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1463 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1464 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1465 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1466 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1467 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1468 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1469 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1470 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1471 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1472 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1473 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1474 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, const Supported ),
1475 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1476 ( "strictness", Opt_Strictness, const Supported ),
1477 ( "specialise", Opt_Specialise, const Supported ),
1478 ( "float-in", Opt_FloatIn, const Supported ),
1479 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1480 ( "full-laziness", Opt_FullLaziness, const Supported ),
1481 ( "liberate-case", Opt_LiberateCase, const Supported ),
1482 ( "spec-constr", Opt_SpecConstr, const Supported ),
1483 ( "cse", Opt_CSE, const Supported ),
1484 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1485 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1486 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, const Supported ),
1487 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1488 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1489 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1490 ( "case-merge", Opt_CaseMerge, const Supported ),
1491 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1492 ( "method-sharing", Opt_MethodSharing, const Supported ),
1493 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1494 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1495 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1496 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1497 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1498 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1499 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1500 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1501 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1502 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1503 ( "break-on-error", Opt_BreakOnError, const Supported ),
1504 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1505 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1506 ( "run-cps", Opt_RunCPS, const Supported ),
1507 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1508 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1509 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1510 ( "vectorise", Opt_Vectorise, const Supported ),
1511 ( "regs-graph", Opt_RegsGraph, const Supported ),
1512 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1513 ( "th", Opt_TemplateHaskell,
1514 deprecatedForLanguage "TemplateHaskell" ),
1515 ( "fi", Opt_ForeignFunctionInterface,
1516 deprecatedForLanguage "ForeignFunctionInterface" ),
1517 ( "ffi", Opt_ForeignFunctionInterface,
1518 deprecatedForLanguage "ForeignFunctionInterface" ),
1519 ( "arrows", Opt_Arrows,
1520 deprecatedForLanguage "Arrows" ),
1521 ( "generics", Opt_Generics,
1522 deprecatedForLanguage "Generics" ),
1523 ( "implicit-prelude", Opt_ImplicitPrelude,
1524 deprecatedForLanguage "ImplicitPrelude" ),
1525 ( "bang-patterns", Opt_BangPatterns,
1526 deprecatedForLanguage "BangPatterns" ),
1527 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1528 deprecatedForLanguage "MonomorphismRestriction" ),
1529 ( "mono-pat-binds", Opt_MonoPatBinds,
1530 deprecatedForLanguage "MonoPatBinds" ),
1531 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1532 deprecatedForLanguage "ExtendedDefaultRules" ),
1533 ( "implicit-params", Opt_ImplicitParams,
1534 deprecatedForLanguage "ImplicitParams" ),
1535 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1536 deprecatedForLanguage "ScopedTypeVariables" ),
1538 deprecatedForLanguage "PArr" ),
1539 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1540 deprecatedForLanguage "OverlappingInstances" ),
1541 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1542 deprecatedForLanguage "UndecidableInstances" ),
1543 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1544 deprecatedForLanguage "IncoherentInstances" ),
1545 ( "gen-manifest", Opt_GenManifest, const Supported ),
1546 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1547 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1548 ( "shared-implib", Opt_SharedImplib, const Supported ),
1549 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1550 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1553 supportedLanguages :: [String]
1554 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1556 -- This may contain duplicates
1557 languageOptions :: [DynFlag]
1558 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1560 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1561 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1563 ( "CPP", Opt_Cpp, const Supported ),
1564 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1565 ( "TupleSections", Opt_TupleSections, const Supported ),
1566 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1567 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1568 ( "MagicHash", Opt_MagicHash, const Supported ),
1569 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1570 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1571 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1572 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1573 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1574 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1575 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1576 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1577 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1578 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1579 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1580 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1581 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1582 const $ Deprecated "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1583 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1584 ( "RecursiveDo", Opt_RecursiveDo,
1585 deprecatedForLanguage "DoRec"),
1586 ( "DoRec", Opt_DoRec, const Supported ),
1587 ( "Arrows", Opt_Arrows, const Supported ),
1588 ( "PArr", Opt_PArr, const Supported ),
1589 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1590 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1591 ( "Generics", Opt_Generics, const Supported ),
1593 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1594 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1595 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1596 ( "RecordPuns", Opt_RecordPuns,
1597 deprecatedForLanguage "NamedFieldPuns" ),
1598 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1599 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1600 ( "GADTs", Opt_GADTs, const Supported ),
1601 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1602 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1603 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1605 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1607 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1608 -- On by default (which is not strictly H98):
1609 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1610 ( "ExplicitForAll", Opt_ExplicitForAll, const Supported ),
1611 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, const Supported ),
1612 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, const Supported ),
1613 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1614 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1615 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1616 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1617 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1619 ( "PatternSignatures", Opt_ScopedTypeVariables,
1620 deprecatedForLanguage "ScopedTypeVariables" ),
1622 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1623 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1624 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1625 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1626 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1627 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1628 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1629 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1630 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1631 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1632 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1633 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1634 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1635 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1636 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1637 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1638 ( "PackageImports", Opt_PackageImports, const Supported ),
1639 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1642 impliedFlags :: [(DynFlag, DynFlag)]
1644 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1645 , (Opt_Rank2Types, Opt_ExplicitForAll)
1646 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1647 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1648 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1649 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1651 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1652 -- be completely rigid for GADTs
1654 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1655 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1656 -- all over the place
1658 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1659 -- Note [Scoped tyvars] in TcBinds
1660 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1662 -- Record wild-cards implies field disambiguation
1663 -- Otherwise if you write (C {..}) you may well get
1664 -- stuff like " 'a' not in scope ", which is a bit silly
1665 -- if the compiler has just filled in field 'a' of constructor 'C'
1666 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1669 glasgowExtsFlags :: [DynFlag]
1670 glasgowExtsFlags = [
1671 Opt_PrintExplicitForalls
1672 , Opt_ForeignFunctionInterface
1673 , Opt_UnliftedFFITypes
1675 , Opt_ImplicitParams
1676 , Opt_ScopedTypeVariables
1678 , Opt_TypeSynonymInstances
1679 , Opt_StandaloneDeriving
1680 , Opt_DeriveDataTypeable
1682 , Opt_DeriveFoldable
1683 , Opt_DeriveTraversable
1684 , Opt_FlexibleContexts
1685 , Opt_FlexibleInstances
1686 , Opt_ConstrainedClassMethods
1687 , Opt_MultiParamTypeClasses
1688 , Opt_FunctionalDependencies
1690 , Opt_PolymorphicComponents
1691 , Opt_ExistentialQuantification
1693 , Opt_PostfixOperators
1695 , Opt_LiberalTypeSynonyms
1699 , Opt_ParallelListComp
1700 , Opt_EmptyDataDecls
1701 , Opt_KindSignatures
1702 , Opt_GeneralizedNewtypeDeriving
1703 , Opt_TypeFamilies ]
1705 -- -----------------------------------------------------------------------------
1706 -- Parsing the dynamic flags.
1708 -- | Parse dynamic flags from a list of command line arguments. Returns the
1709 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1710 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1711 -- flags or missing arguments).
1712 parseDynamicFlags :: Monad m =>
1713 DynFlags -> [Located String]
1714 -> m (DynFlags, [Located String], [Located String])
1715 -- ^ Updated 'DynFlags', left-over arguments, and
1716 -- list of warnings.
1717 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1719 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1720 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1721 parseDynamicNoPackageFlags :: Monad m =>
1722 DynFlags -> [Located String]
1723 -> m (DynFlags, [Located String], [Located String])
1724 -- ^ Updated 'DynFlags', left-over arguments, and
1725 -- list of warnings.
1726 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1728 parseDynamicFlags_ :: Monad m =>
1729 DynFlags -> [Located String] -> Bool
1730 -> m (DynFlags, [Located String], [Located String])
1731 parseDynamicFlags_ dflags0 args pkg_flags = do
1732 -- XXX Legacy support code
1733 -- We used to accept things like
1734 -- optdep-f -optdepdepend
1735 -- optdep-f -optdep depend
1736 -- optdep -f -optdepdepend
1737 -- optdep -f -optdep depend
1738 -- but the spaces trip up proper argument handling. So get rid of them.
1739 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1740 f (x : xs) = x : f xs
1744 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1745 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1746 | otherwise = dynamic_flags
1748 let ((leftover, errs, warns), dflags1)
1749 = runCmdLine (processArgs flag_spec args') dflags0
1750 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1752 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1753 -- isn't up to the job. We know that if hscTarget == HscC, then the
1754 -- user has explicitly used -fvia-C, because -fasm is the default,
1755 -- unless there is no NCG on this platform. The latter case is
1756 -- checked when the -fPIC flag is parsed.
1758 let (pic_warns, dflags2) =
1759 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1760 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1761 dflags1{ hscTarget = HscAsm })
1764 return (dflags2, leftover, pic_warns ++ warns)
1766 type DynP = CmdLineP DynFlags
1768 upd :: (DynFlags -> DynFlags) -> DynP ()
1770 dfs <- getCmdLineState
1771 putCmdLineState $! (f dfs)
1773 --------------------------
1774 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1775 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1776 ; mapM_ setDynFlag deps }
1778 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1779 -- When you set f, set the ones it implies
1780 -- NB: use setDynFlag recursively, in case the implied flags
1781 -- implies further flags
1782 -- When you un-set f, however, we don't un-set the things it implies
1783 -- (except for -fno-glasgow-exts, which is treated specially)
1785 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1787 --------------------------
1788 setDumpFlag :: DynFlag -> OptKind DynP
1789 setDumpFlag dump_flag
1790 = NoArg (do { setDynFlag dump_flag
1791 ; when want_recomp forceRecompile })
1793 -- Certain dumpy-things are really interested in what's going
1794 -- on during recompilation checking, so in those cases we
1795 -- don't want to turn it off.
1796 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1797 Opt_D_dump_hi_diffs]
1799 forceRecompile :: DynP ()
1800 -- Whenver we -ddump, force recompilation (by switching off the
1801 -- recompilation checker), else you don't see the dump! However,
1802 -- don't switch it off in --make mode, else *everything* gets
1803 -- recompiled which probably isn't what you want
1804 forceRecompile = do { dfs <- getCmdLineState
1805 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1807 force_recomp dfs = isOneShot (ghcMode dfs)
1809 setVerboseCore2Core :: DynP ()
1810 setVerboseCore2Core = do forceRecompile
1811 setDynFlag Opt_D_verbose_core2core
1812 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1815 setDumpSimplPhases :: String -> DynP ()
1816 setDumpSimplPhases s = do forceRecompile
1817 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1819 spec = case s of { ('=' : s') -> s'; _ -> s }
1821 setVerbosity :: Maybe Int -> DynP ()
1822 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1824 addCmdlineHCInclude :: String -> DynP ()
1825 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1827 extraPkgConf_ :: FilePath -> DynP ()
1828 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1830 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1832 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1834 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1836 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1838 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1840 setPackageName :: String -> DynFlags -> DynFlags
1841 setPackageName p s = s{ thisPackage = stringToPackageId p }
1843 -- If we're linking a binary, then only targets that produce object
1844 -- code are allowed (requests for other target types are ignored).
1845 setTarget :: HscTarget -> DynP ()
1846 setTarget l = upd set
1849 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1852 -- Changes the target only if we're compiling object code. This is
1853 -- used by -fasm and -fvia-C, which switch from one to the other, but
1854 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1855 -- can be safely used in an OPTIONS_GHC pragma.
1856 setObjTarget :: HscTarget -> DynP ()
1857 setObjTarget l = upd set
1860 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1863 setOptLevel :: Int -> DynFlags -> DynFlags
1864 setOptLevel n dflags
1865 | hscTarget dflags == HscInterpreted && n > 0
1867 -- not in IO any more, oh well:
1868 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1870 = updOptLevel n dflags
1873 -- -Odph is equivalent to
1875 -- -O2 optimise as much as possible
1876 -- -fno-method-sharing sharing specialisation defeats fusion
1878 -- -fdicts-cheap always inline dictionaries
1879 -- -fmax-simplifier-iterations20 this is necessary sometimes
1880 -- -fsimplifier-phases=3 we use an additional simplifier phase
1882 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1883 -- -fno-spec-constr-count SpecConstr as much as possible
1884 -- -finline-enough-args hack to prevent excessive inlining
1886 setDPHOpt :: DynFlags -> DynFlags
1887 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1889 , specConstrThreshold = Nothing
1890 , specConstrCount = Nothing
1892 `dopt_set` Opt_DictsCheap
1893 `dopt_unset` Opt_MethodSharing
1895 data DPHBackend = DPHPar
1898 deriving(Eq, Ord, Enum, Show)
1900 setDPHBackend :: DPHBackend -> DynP ()
1901 setDPHBackend backend
1903 upd $ \dflags -> dflags { dphBackend = backend }
1904 mapM_ exposePackage (dph_packages backend)
1906 dph_packages DPHThis = []
1907 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1908 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1910 dphPackage :: DynFlags -> PackageId
1911 dphPackage dflags = case dphBackend dflags of
1912 DPHPar -> dphParPackageId
1913 DPHSeq -> dphSeqPackageId
1914 DPHThis -> thisPackage dflags
1916 setMainIs :: String -> DynP ()
1918 | not (null main_fn) && isLower (head main_fn)
1919 -- The arg looked like "Foo.Bar.baz"
1920 = upd $ \d -> d{ mainFunIs = Just main_fn,
1921 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1923 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1924 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1926 | otherwise -- The arg looked like "baz"
1927 = upd $ \d -> d{ mainFunIs = Just arg }
1929 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1931 -----------------------------------------------------------------------------
1932 -- Paths & Libraries
1934 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1936 -- -i on its own deletes the import paths
1937 addImportPath "" = upd (\s -> s{importPaths = []})
1938 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1942 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1945 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1947 addFrameworkPath p =
1948 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1950 #ifndef mingw32_TARGET_OS
1951 split_marker :: Char
1952 split_marker = ':' -- not configurable (ToDo)
1955 splitPathList :: String -> [String]
1956 splitPathList s = filter notNull (splitUp s)
1957 -- empty paths are ignored: there might be a trailing
1958 -- ':' in the initial list, for example. Empty paths can
1959 -- cause confusion when they are translated into -I options
1960 -- for passing to gcc.
1962 #ifndef mingw32_TARGET_OS
1963 splitUp xs = split split_marker xs
1965 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1967 -- That is, if "foo:bar:baz" is used, this interpreted as
1968 -- consisting of three entries, 'foo', 'bar', 'baz'.
1969 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1970 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1972 -- Notice that no attempt is made to fully replace the 'standard'
1973 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1974 -- that this will cause too much breakage for users & ':' will
1975 -- work fine even with DOS paths, if you're not insisting on being silly.
1978 splitUp (x:':':div:xs) | div `elem` dir_markers
1979 = ((x:':':div:p): splitUp rs)
1981 (p,rs) = findNextPath xs
1982 -- we used to check for existence of the path here, but that
1983 -- required the IO monad to be threaded through the command-line
1984 -- parser which is quite inconvenient. The
1985 splitUp xs = cons p (splitUp rs)
1987 (p,rs) = findNextPath xs
1992 -- will be called either when we've consumed nought or the
1993 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1994 -- finding the next split marker.
1996 case break (`elem` split_markers) xs of
1997 (p, _:ds) -> (p, ds)
2000 split_markers :: [Char]
2001 split_markers = [':', ';']
2003 dir_markers :: [Char]
2004 dir_markers = ['/', '\\']
2007 -- -----------------------------------------------------------------------------
2008 -- tmpDir, where we store temporary files.
2010 setTmpDir :: FilePath -> DynFlags -> DynFlags
2011 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2012 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2013 -- seem necessary now --SDM 7/2/2008
2015 -----------------------------------------------------------------------------
2018 setOptHpcDir :: String -> DynP ()
2019 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2021 -----------------------------------------------------------------------------
2022 -- Via-C compilation stuff
2024 -- There are some options that we need to pass to gcc when compiling
2025 -- Haskell code via C, but are only supported by recent versions of
2026 -- gcc. The configure script decides which of these options we need,
2027 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2028 -- read before each via-C compilation. The advantage of having these
2029 -- in a separate file is that the file can be created at install-time
2030 -- depending on the available gcc version, and even re-generated later
2031 -- if gcc is upgraded.
2033 -- The options below are not dependent on the version of gcc, only the
2036 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2037 [String]) -- for registerised HC compilations
2038 machdepCCOpts _dflags
2039 #if alpha_TARGET_ARCH
2041 #ifdef HAVE_THREADED_RTS_SUPPORT
2045 -- For now, to suppress the gcc warning "call-clobbered
2046 -- register used for global register variable", we simply
2047 -- disable all warnings altogether using the -w flag. Oh well.
2049 #elif hppa_TARGET_ARCH
2050 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2051 -- (very nice, but too bad the HP /usr/include files don't agree.)
2052 = ( ["-D_HPUX_SOURCE"], [] )
2054 #elif m68k_TARGET_ARCH
2055 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2056 -- popping of args to routines to be explicit; if we let things
2057 -- be deferred 'til after an STGJUMP, imminent death is certain!
2059 -- -fomit-frame-pointer : *don't*
2060 -- It's better to have a6 completely tied up being a frame pointer
2061 -- rather than let GCC pick random things to do with it.
2062 -- (If we want to steal a6, then we would try to do things
2063 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2064 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2066 #elif i386_TARGET_ARCH
2067 -- -fno-defer-pop : basically the same game as for m68k
2069 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2070 -- the fp (%ebp) for our register maps.
2071 = let n_regs = stolen_x86_regs _dflags
2074 #if darwin_TARGET_OS
2075 -- By default, gcc on OS X will generate SSE
2076 -- instructions, which need things 16-byte aligned,
2077 -- but we don't 16-byte align things. Thus drop
2078 -- back to generic i686 compatibility. Trac #2983.
2080 -- Since Snow Leopard (10.6), gcc defaults to x86_64.
2081 ["-march=i686", "-m32"],
2083 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2087 "-fomit-frame-pointer",
2088 -- we want -fno-builtin, because when gcc inlines
2089 -- built-in functions like memcpy() it tends to
2090 -- run out of registers, requiring -monly-n-regs
2092 "-DSTOLEN_X86_REGS="++show n_regs ]
2095 #elif ia64_TARGET_ARCH
2096 = ( [], ["-fomit-frame-pointer", "-G0"] )
2098 #elif x86_64_TARGET_ARCH
2100 #if darwin_TARGET_OS
2105 ["-fomit-frame-pointer",
2106 "-fno-asynchronous-unwind-tables",
2107 -- the unwind tables are unnecessary for HC code,
2108 -- and get in the way of -split-objs. Another option
2109 -- would be to throw them away in the mangler, but this
2112 -- calling builtins like strlen() using the FFI can
2113 -- cause gcc to run out of regs, so use the external
2117 #elif sparc_TARGET_ARCH
2119 -- For now, to suppress the gcc warning "call-clobbered
2120 -- register used for global register variable", we simply
2121 -- disable all warnings altogether using the -w flag. Oh well.
2123 #elif powerpc_apple_darwin_TARGET
2125 -- Disable Apple's precompiling preprocessor. It's a great thing
2126 -- for "normal" programs, but it doesn't support register variable
2128 = ( [], ["-no-cpp-precomp"] )
2133 picCCOpts :: DynFlags -> [String]
2135 #if darwin_TARGET_OS
2136 -- Apple prefers to do things the other way round.
2137 -- PIC is on by default.
2138 -- -mdynamic-no-pic:
2139 -- Turn off PIC code generation.
2141 -- Don't generate "common" symbols - these are unwanted
2142 -- in dynamic libraries.
2145 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2147 = ["-mdynamic-no-pic"]
2148 #elif mingw32_TARGET_OS
2149 -- no -fPIC for Windows
2151 = ["-U __PIC__","-D__PIC__"]
2155 | opt_PIC || not opt_Static
2156 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2161 -- -----------------------------------------------------------------------------
2165 can_split = cSplitObjs == "YES"
2167 -- -----------------------------------------------------------------------------
2170 data Printable = String String
2171 | FromDynFlags (DynFlags -> String)
2173 compilerInfo :: [(String, Printable)]
2174 compilerInfo = [("Project name", String cProjectName),
2175 ("Project version", String cProjectVersion),
2176 ("Booter version", String cBooterVersion),
2177 ("Stage", String cStage),
2178 ("Have interpreter", String cGhcWithInterpreter),
2179 ("Object splitting", String cSplitObjs),
2180 ("Have native code generator", String cGhcWithNativeCodeGen),
2181 ("Support SMP", String cGhcWithSMP),
2182 ("Unregisterised", String cGhcUnregisterised),
2183 ("Tables next to code", String cGhcEnableTablesNextToCode),
2184 ("Win32 DLLs", String cEnableWin32DLLs),
2185 ("RTS ways", String cGhcRTSWays),
2186 ("Leading underscore", String cLeadingUnderscore),
2187 ("Debug on", String (show debugIsOn)),
2188 ("LibDir", FromDynFlags topDir)