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
410 rtsOpts :: Maybe String,
412 hpcDir :: String, -- ^ Path to store the .mix files
414 -- options for particular phases
422 opt_windres :: [String],
424 -- commands for particular phases
426 pgm_P :: (String,[Option]),
428 pgm_c :: (String,[Option]),
429 pgm_m :: (String,[Option]),
430 pgm_s :: (String,[Option]),
431 pgm_a :: (String,[Option]),
432 pgm_l :: (String,[Option]),
433 pgm_dll :: (String,[Option]),
435 pgm_sysman :: String,
436 pgm_windres :: String,
439 depMakefile :: FilePath,
440 depIncludePkgDeps :: Bool,
441 depExcludeMods :: [ModuleName],
442 depSuffixes :: [String],
445 extraPkgConfs :: [FilePath],
446 topDir :: FilePath, -- filled in by SysTools
447 systemPackageConfig :: FilePath, -- ditto
448 -- ^ The @-package-conf@ flags given on the command line, in the order
451 packageFlags :: [PackageFlag],
452 -- ^ The @-package@ and @-hide-package@ flags from the command-line
455 -- NB. do not modify this field, it is calculated by
456 -- Packages.initPackages and Packages.updatePackages.
457 pkgDatabase :: Maybe [PackageConfig],
458 pkgState :: PackageState,
461 -- These have to be IORefs, because the defaultCleanupHandler needs to
462 -- know what to clean when an exception happens
463 filesToClean :: IORef [FilePath],
464 dirsToClean :: IORef (FiniteMap FilePath FilePath),
469 -- | Message output action: use "ErrUtils" instead of this if you can
470 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
472 haddockOptions :: Maybe String
475 wayNames :: DynFlags -> [WayName]
476 wayNames = map wayName . ways
478 -- | The target code type of the compilation (if any).
480 -- Whenever you change the target, also make sure to set 'ghcLink' to
481 -- something sensible.
483 -- 'HscNothing' can be used to avoid generating any output, however, note
486 -- * This will not run the desugaring step, thus no warnings generated in
487 -- this step will be output. In particular, this includes warnings related
488 -- to pattern matching. You can run the desugarer manually using
489 -- 'GHC.desugarModule'.
491 -- * If a program uses Template Haskell the typechecker may try to run code
492 -- from an imported module. This will fail if no code has been generated
493 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
494 -- whether this might be the case and choose to either switch to a
495 -- different target or avoid typechecking such modules. (The latter may
496 -- preferable for security reasons.)
499 = HscC -- ^ Generate C code.
500 | HscAsm -- ^ Generate assembly using the native code generator.
501 | HscJava -- ^ Generate Java bytecode.
502 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
503 | HscNothing -- ^ Don't generate any code. See notes above.
506 -- | Will this target result in an object file on the disk?
507 isObjectTarget :: HscTarget -> Bool
508 isObjectTarget HscC = True
509 isObjectTarget HscAsm = True
510 isObjectTarget _ = False
512 -- | The 'GhcMode' tells us whether we're doing multi-module
513 -- compilation (controlled via the "GHC" API) or one-shot
514 -- (single-module) compilation. This makes a difference primarily to
515 -- the "Finder": in one-shot mode we look for interface files for
516 -- imported modules, but in multi-module mode we look for source files
517 -- in order to check whether they need to be recompiled.
519 = CompManager -- ^ @\-\-make@, GHCi, etc.
520 | OneShot -- ^ @ghc -c Foo.hs@
521 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
524 instance Outputable GhcMode where
525 ppr CompManager = ptext (sLit "CompManager")
526 ppr OneShot = ptext (sLit "OneShot")
527 ppr MkDepend = ptext (sLit "MkDepend")
529 isOneShot :: GhcMode -> Bool
530 isOneShot OneShot = True
531 isOneShot _other = False
533 -- | What to do in the link step, if there is one.
535 = NoLink -- ^ Don't link at all
536 | LinkBinary -- ^ Link object code into a binary
537 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
538 -- bytecode and object code).
539 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
542 isNoLink :: GhcLink -> Bool
543 isNoLink NoLink = True
546 -- Is it worth evaluating this Bool and caching it in the DynFlags value
547 -- during initDynFlags?
548 doingTickyProfiling :: DynFlags -> Bool
549 doingTickyProfiling _ = opt_Ticky
550 -- XXX -ticky is a static flag, because it implies -debug which is also
551 -- static. If the way flags were made dynamic, we could fix this.
554 = ExposePackage String
555 | ExposePackageId String
557 | IgnorePackage String
560 defaultHscTarget :: HscTarget
561 defaultHscTarget = defaultObjectTarget
563 -- | The 'HscTarget' value corresponding to the default way to create
564 -- object files on the current platform.
565 defaultObjectTarget :: HscTarget
567 | cGhcWithNativeCodeGen == "YES" = HscAsm
572 | Wrapped (Maybe String)
576 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
577 initDynFlags :: DynFlags -> IO DynFlags
578 initDynFlags dflags = do
579 -- someday these will be dynamic flags
580 ways <- readIORef v_Ways
581 refFilesToClean <- newIORef []
582 refDirsToClean <- newIORef emptyFM
585 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
586 rtsBuildTag = mkBuildTag ways,
587 filesToClean = refFilesToClean,
588 dirsToClean = refDirsToClean
591 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
592 -- and must be fully initialized by 'GHC.newSession' first.
593 defaultDynFlags :: DynFlags
596 ghcMode = CompManager,
597 ghcLink = LinkBinary,
598 hscTarget = defaultHscTarget,
604 maxSimplIterations = 4,
605 shouldDumpSimplPhase = Nothing,
607 specConstrThreshold = Just 200,
608 specConstrCount = Just 3,
609 liberateCaseThreshold = Just 200,
610 strictnessBefore = [],
612 #ifndef OMIT_NATIVE_CODEGEN
613 targetPlatform = defaultTargetPlatform,
616 cmdlineHcIncludes = [],
620 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
624 thisPackage = mainPackageId,
627 dylibInstallName = Nothing,
631 objectSuf = phaseInputExt StopLn,
632 hcSuf = phaseInputExt HCc,
635 outputFile = Nothing,
637 dynLibLoader = SystemDependent,
638 dumpPrefix = Nothing,
639 dumpPrefixForce = Nothing,
643 cmdlineFrameworks = [],
644 tmpDir = cDEFAULT_TMPDIR,
651 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
662 pkgDatabase = Nothing,
663 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
664 ways = panic "defaultDynFlags: No ways",
665 buildTag = panic "defaultDynFlags: No buildTag",
666 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
668 -- initSysTools fills all these in
669 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
670 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
671 topDir = panic "defaultDynFlags: No topDir",
672 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
673 pgm_L = panic "defaultDynFlags: No pgm_L",
674 pgm_P = panic "defaultDynFlags: No pgm_P",
675 pgm_F = panic "defaultDynFlags: No pgm_F",
676 pgm_c = panic "defaultDynFlags: No pgm_c",
677 pgm_m = panic "defaultDynFlags: No pgm_m",
678 pgm_s = panic "defaultDynFlags: No pgm_s",
679 pgm_a = panic "defaultDynFlags: No pgm_a",
680 pgm_l = panic "defaultDynFlags: No pgm_l",
681 pgm_dll = panic "defaultDynFlags: No pgm_dll",
682 pgm_T = panic "defaultDynFlags: No pgm_T",
683 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
684 pgm_windres = panic "defaultDynFlags: No pgm_windres",
685 -- end of initSysTools values
687 depMakefile = "Makefile",
688 depIncludePkgDeps = False,
691 -- end of ghc -M values
692 filesToClean = panic "defaultDynFlags: No filesToClean",
693 dirsToClean = panic "defaultDynFlags: No dirsToClean",
694 haddockOptions = Nothing,
696 Opt_AutoLinkPackages,
697 Opt_ReadUserPackageConf,
699 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
700 -- behaviour the default, to see if anyone notices
704 Opt_MonomorphismRestriction,
715 Opt_PrintBindContents
717 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
718 -- The default -O0 options
721 log_action = \severity srcSpan style msg ->
723 SevInfo -> printErrs (msg style)
724 SevFatal -> printErrs (msg style)
727 printErrs ((mkLocMessage srcSpan msg) style)
728 -- careful (#2302): printErrs prints in UTF-8, whereas
729 -- converting to string first and using hPutStr would
730 -- just emit the low 8 bits of each unicode char.
734 Note [Verbosity levels]
735 ~~~~~~~~~~~~~~~~~~~~~~~
736 0 | print errors & warnings only
737 1 | minimal verbosity: print "compiling M ... done." for each module.
738 2 | equivalent to -dshow-passes
739 3 | equivalent to existing "ghc -v"
740 4 | "ghc -v -ddump-most"
741 5 | "ghc -v -ddump-all"
744 -- | Test whether a 'DynFlag' is set
745 dopt :: DynFlag -> DynFlags -> Bool
746 dopt f dflags = f `elem` (flags dflags)
749 dopt_set :: DynFlags -> DynFlag -> DynFlags
750 dopt_set dfs f = dfs{ flags = f : flags dfs }
752 -- | Unset a 'DynFlag'
753 dopt_unset :: DynFlags -> DynFlag -> DynFlags
754 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
756 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
757 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
758 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
759 -> [a] -- ^ Correctly ordered extracted options
760 getOpts dflags opts = reverse (opts dflags)
761 -- We add to the options from the front, so we need to reverse the list
763 -- | Gets the verbosity flag for the current verbosity level. This is fed to
764 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
765 getVerbFlag :: DynFlags -> String
767 | verbosity dflags >= 3 = "-v"
770 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
771 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
772 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
773 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
774 addCmdlineFramework, addHaddockOpts
775 :: String -> DynFlags -> DynFlags
776 setOutputFile, setOutputHi, setDumpPrefixForce
777 :: Maybe String -> DynFlags -> DynFlags
779 setObjectDir f d = d{ objectDir = Just f}
780 setHiDir f d = d{ hiDir = Just f}
781 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
782 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
783 -- \#included from the .hc file when compiling with -fvia-C.
784 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
785 setDylibInstallName f d = d{ dylibInstallName = Just f}
787 setObjectSuf f d = d{ objectSuf = f}
788 setHiSuf f d = d{ hiSuf = f}
789 setHcSuf f d = d{ hcSuf = f}
791 setOutputFile f d = d{ outputFile = f}
792 setOutputHi f d = d{ outputHi = f}
794 parseDynLibLoaderMode f d =
796 ("deploy", "") -> d{ dynLibLoader = Deployable }
797 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
798 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
799 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
800 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
801 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
803 setDumpPrefixForce f d = d { dumpPrefixForce = f}
805 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
806 -- Config.hs should really use Option.
807 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
809 setPgmL f d = d{ pgm_L = f}
810 setPgmF f d = d{ pgm_F = f}
811 setPgmc f d = d{ pgm_c = (f,[])}
812 setPgmm f d = d{ pgm_m = (f,[])}
813 setPgms f d = d{ pgm_s = (f,[])}
814 setPgma f d = d{ pgm_a = (f,[])}
815 setPgml f d = d{ pgm_l = (f,[])}
816 setPgmdll f d = d{ pgm_dll = (f,[])}
817 setPgmwindres f d = d{ pgm_windres = f}
819 addOptL f d = d{ opt_L = f : opt_L d}
820 addOptP f d = d{ opt_P = f : opt_P d}
821 addOptF f d = d{ opt_F = f : opt_F d}
822 addOptc f d = d{ opt_c = f : opt_c d}
823 addOptm f d = d{ opt_m = f : opt_m d}
824 addOpta f d = d{ opt_a = f : opt_a d}
825 addOptl f d = d{ opt_l = f : opt_l d}
826 addOptwindres f d = d{ opt_windres = f : opt_windres d}
828 setDepMakefile :: FilePath -> DynFlags -> DynFlags
829 setDepMakefile f d = d { depMakefile = deOptDep f }
831 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
832 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
834 addDepExcludeMod :: String -> DynFlags -> DynFlags
836 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
838 addDepSuffix :: FilePath -> DynFlags -> DynFlags
839 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
842 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
843 -- we need to strip the "-optdep" off of the arg
844 deOptDep :: String -> String
845 deOptDep x = case stripPrefix "-optdep" x of
849 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
851 addHaddockOpts f d = d{ haddockOptions = Just f}
853 -- -----------------------------------------------------------------------------
854 -- Command-line options
856 -- | When invoking external tools as part of the compilation pipeline, we
857 -- pass these a sequence of options on the command-line. Rather than
858 -- just using a list of Strings, we use a type that allows us to distinguish
859 -- between filepaths and 'other stuff'. The reason for this is that
860 -- this type gives us a handle on transforming filenames, and filenames only,
861 -- to whatever format they're expected to be on a particular platform.
863 = FileOption -- an entry that _contains_ filename(s) / filepaths.
864 String -- a non-filepath prefix that shouldn't be
865 -- transformed (e.g., "/out=")
866 String -- the filepath/filename portion
869 showOpt :: Option -> String
870 showOpt (FileOption pre f) = pre ++ f
871 showOpt (Option s) = s
873 -----------------------------------------------------------------------------
874 -- Setting the optimisation level
876 updOptLevel :: Int -> DynFlags -> DynFlags
877 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
879 = dfs2{ optLevel = final_n }
881 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
882 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
883 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
885 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
886 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
888 optLevelFlags :: [([Int], DynFlag)]
890 = [ ([0], Opt_IgnoreInterfacePragmas)
891 , ([0], Opt_OmitInterfacePragmas)
893 , ([1,2], Opt_IgnoreAsserts)
894 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
896 , ([1,2], Opt_DoEtaReduction)
897 , ([1,2], Opt_CaseMerge)
898 , ([1,2], Opt_Strictness)
900 , ([1,2], Opt_FullLaziness)
901 , ([1,2], Opt_Specialise)
902 , ([1,2], Opt_FloatIn)
904 , ([2], Opt_LiberateCase)
905 , ([2], Opt_SpecConstr)
907 -- , ([2], Opt_StaticArgumentTransformation)
908 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
909 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
910 -- several improvements to the heuristics, and I'm concerned that without
911 -- those changes SAT will interfere with some attempts to write "high
912 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
913 -- this year. In particular, the version in HEAD lacks the tail call
914 -- criterion, so many things that look like reasonable loops will be
915 -- turned into functions with extra (unneccesary) thunk creation.
917 , ([0,1,2], Opt_DoLambdaEtaExpansion)
918 -- This one is important for a tiresome reason:
919 -- we want to make sure that the bindings for data
920 -- constructors are eta-expanded. This is probably
921 -- a good thing anyway, but it seems fragile.
924 -- -----------------------------------------------------------------------------
925 -- Standard sets of warning options
927 standardWarnings :: [DynFlag]
929 = [ Opt_WarnWarningsDeprecations,
930 Opt_WarnDeprecatedFlags,
931 Opt_WarnUnrecognisedPragmas,
932 Opt_WarnOverlappingPatterns,
933 Opt_WarnMissingFields,
934 Opt_WarnMissingMethods,
935 Opt_WarnDuplicateExports,
936 Opt_WarnLazyUnliftedBindings,
937 Opt_WarnDodgyForeignImports,
939 Opt_WarnAlternativeLayoutRuleTransitional
942 minusWOpts :: [DynFlag]
944 = standardWarnings ++
945 [ Opt_WarnUnusedBinds,
946 Opt_WarnUnusedMatches,
947 Opt_WarnUnusedImports,
948 Opt_WarnIncompletePatterns,
949 Opt_WarnDodgyExports,
953 minusWallOpts :: [DynFlag]
956 [ Opt_WarnTypeDefaults,
957 Opt_WarnNameShadowing,
964 -- minuswRemovesOpts should be every warning option
965 minuswRemovesOpts :: [DynFlag]
968 [Opt_WarnImplicitPrelude,
969 Opt_WarnIncompletePatternsRecUpd,
970 Opt_WarnSimplePatterns,
971 Opt_WarnMonomorphism,
972 Opt_WarnUnrecognisedPragmas,
976 -- -----------------------------------------------------------------------------
977 -- StgToDo: abstraction of stg-to-stg passes to run.
980 = StgDoMassageForProfiling -- should be (next to) last
981 -- There's also setStgVarInfo, but its absolute "lastness"
982 -- is so critical that it is hardwired in (no flag).
985 getStgToDo :: DynFlags -> [StgToDo]
989 stg_stats = dopt Opt_StgStats dflags
991 todo1 = if stg_stats then [D_stg_stats] else []
993 todo2 | WayProf `elem` wayNames dflags
994 = StgDoMassageForProfiling : todo1
998 -- -----------------------------------------------------------------------------
1001 allFlags :: [String]
1002 allFlags = map ('-':) $
1003 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1004 map ("fno-"++) flags ++
1005 map ("f"++) flags ++
1006 map ("X"++) supportedLanguages ++
1007 map ("XNo"++) supportedLanguages
1008 where ok (PrefixPred _ _) = False
1010 flags = [ name | (name, _, _) <- fFlags ]
1012 dynamic_flags :: [Flag DynP]
1014 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1015 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1016 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1017 , Flag "#include" (HasArg (addCmdlineHCInclude))
1018 (Deprecated "No longer has any effect")
1019 , Flag "v" (OptIntSuffix setVerbosity) Supported
1021 ------- Specific phases --------------------------------------------
1022 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1023 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1024 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1025 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1026 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1027 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1028 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1029 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1030 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1031 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1033 , Flag "optL" (HasArg (upd . addOptL)) Supported
1034 , Flag "optP" (HasArg (upd . addOptP)) Supported
1035 , Flag "optF" (HasArg (upd . addOptF)) Supported
1036 , Flag "optc" (HasArg (upd . addOptc)) Supported
1037 , Flag "optm" (HasArg (upd . addOptm)) Supported
1038 , Flag "opta" (HasArg (upd . addOpta)) Supported
1039 , Flag "optl" (HasArg (upd . addOptl)) Supported
1040 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1043 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1046 -------- ghc -M -----------------------------------------------------
1047 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1048 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1049 (Deprecated "Use -dep-suffix instead")
1050 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1051 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1052 (Deprecated "Use -dep-makefile instead")
1053 , Flag "optdep-w" (NoArg (return ()))
1054 (Deprecated "-optdep-w doesn't do anything")
1055 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1056 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1057 (Deprecated "Use -include-pkg-deps instead")
1058 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1059 (Deprecated "Use -include-pkg-deps instead")
1060 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1061 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1062 (Deprecated "Use -exclude-module instead")
1063 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1064 (Deprecated "Use -exclude-module instead")
1066 -------- Linking ----------------------------------------------------
1067 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1069 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1070 (Deprecated "Use -c instead")
1071 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1073 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1075 , Flag "dylib-install-name" (HasArg (upd . setDylibInstallName)) Supported
1077 ------- Libraries ---------------------------------------------------
1078 , Flag "L" (Prefix addLibraryPath ) Supported
1079 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1081 ------- Frameworks --------------------------------------------------
1082 -- -framework-path should really be -F ...
1083 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1084 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1086 ------- Output Redirection ------------------------------------------
1087 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1088 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1089 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1090 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1091 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1092 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1093 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1094 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1095 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1096 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1097 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1100 ------- Keeping temporary files -------------------------------------
1101 -- These can be singular (think ghc -c) or plural (think ghc --make)
1102 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1103 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1104 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1105 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1106 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1107 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1108 -- This only makes sense as plural
1109 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1111 ------- Miscellaneous ----------------------------------------------
1112 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1113 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1114 , Flag "with-rtsopts" (HasArg setRtsOpts) Supported
1115 , Flag "rtsopts" (NoArg (setDynFlag Opt_RtsOptsEnabled)) Supported
1116 , Flag "no-rtsopts" (NoArg (unSetDynFlag Opt_RtsOptsEnabled)) Supported
1117 , Flag "main-is" (SepArg setMainIs ) Supported
1118 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1119 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1120 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1122 ------- recompilation checker --------------------------------------
1123 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1124 (Deprecated "Use -fno-force-recomp instead")
1125 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1126 (Deprecated "Use -fforce-recomp instead")
1128 ------ HsCpp opts ---------------------------------------------------
1129 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1130 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1132 ------- Include/Import Paths ----------------------------------------
1133 , Flag "I" (Prefix addIncludePath) Supported
1134 , Flag "i" (OptPrefix addImportPath ) Supported
1136 ------ Debugging ----------------------------------------------------
1137 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1139 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1141 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1143 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1145 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1147 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1149 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1151 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1153 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1155 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1157 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1159 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1161 , Flag "ddump-asm-regalloc-stages"
1162 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1164 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1166 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1168 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1170 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1172 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1174 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1176 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1178 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1180 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1182 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1184 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1186 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1188 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1190 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1192 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1194 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1196 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1198 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1200 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1202 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1204 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1206 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1208 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1210 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1212 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1214 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1216 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1218 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1220 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1222 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1224 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1226 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1228 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1230 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1231 ; setVerboseCore2Core }))
1233 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1235 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1237 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1239 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1241 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1243 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1245 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1247 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1249 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1251 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1254 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1256 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1258 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1260 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1262 , Flag "dshow-passes"
1263 (NoArg (do forceRecompile
1264 setVerbosity (Just 2)))
1266 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1269 ------ Machine dependant (-m<blah>) stuff ---------------------------
1271 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1273 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1275 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1278 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1281 ------ Warning opts -------------------------------------------------
1282 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1284 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1286 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1288 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1290 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1291 (Deprecated "Use -w instead")
1292 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1295 ------ Optimisation flags ------------------------------------------
1296 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1297 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1298 (Deprecated "Use -O0 instead")
1299 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1300 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1302 -- If the number is missing, use 1
1304 , Flag "fsimplifier-phases"
1305 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1307 , Flag "fmax-simplifier-iterations"
1308 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1311 , Flag "fspec-constr-threshold"
1312 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1314 , Flag "fno-spec-constr-threshold"
1315 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1317 , Flag "fspec-constr-count"
1318 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1320 , Flag "fno-spec-constr-count"
1321 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1323 , Flag "fliberate-case-threshold"
1324 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1326 , Flag "fno-liberate-case-threshold"
1327 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1330 , Flag "frule-check"
1331 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1333 , Flag "fcontext-stack"
1334 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1337 , Flag "fstrictness-before"
1338 (IntSuffix (\n -> upd (\dfs -> dfs{ strictnessBefore = n : strictnessBefore dfs })))
1341 ------ Profiling ----------------------------------------------------
1343 -- XXX Should the -f* flags be deprecated?
1344 -- They don't seem to be documented
1345 , Flag "fauto-sccs-on-all-toplevs"
1346 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1349 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1351 , Flag "no-auto-all"
1352 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1354 , Flag "fauto-sccs-on-exported-toplevs"
1355 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1358 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1361 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1363 , Flag "fauto-sccs-on-individual-cafs"
1364 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1367 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1370 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1373 ------ DPH flags ----------------------------------------------------
1376 (NoArg (setDPHBackend DPHSeq))
1379 (NoArg (setDPHBackend DPHPar))
1382 (NoArg (setDPHBackend DPHThis))
1385 ------ Compiler flags -----------------------------------------------
1387 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1388 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1389 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1391 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1392 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1393 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1395 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1397 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1400 ++ map (mkFlag True "f" setDynFlag ) fFlags
1401 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1402 ++ map (mkFlag True "X" setDynFlag ) xFlags
1403 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1405 package_flags :: [Flag DynP]
1407 ------- Packages ----------------------------------------------------
1408 Flag "package-conf" (HasArg extraPkgConf_) Supported
1409 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1411 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1412 , Flag "package-id" (HasArg exposePackageId) Supported
1413 , Flag "package" (HasArg exposePackage) Supported
1414 , Flag "hide-package" (HasArg hidePackage) Supported
1415 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1417 , Flag "ignore-package" (HasArg ignorePackage)
1419 , Flag "syslib" (HasArg exposePackage)
1420 (Deprecated "Use -package instead")
1423 mkFlag :: Bool -- ^ True <=> it should be turned on
1424 -> String -- ^ The flag prefix
1425 -> (DynFlag -> DynP ())
1426 -> (String, DynFlag, Bool -> Deprecated)
1428 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1429 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1431 deprecatedForLanguage :: String -> Bool -> Deprecated
1432 deprecatedForLanguage lang turn_on
1433 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1435 flag | turn_on = lang
1436 | otherwise = "No"++lang
1438 useInstead :: String -> Bool -> Deprecated
1439 useInstead flag turn_on
1440 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1442 no = if turn_on then "" else "no-"
1444 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1445 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1447 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1448 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1449 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1450 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1451 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1452 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1453 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1454 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1455 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1456 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1457 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1458 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1459 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1460 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1461 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1462 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1463 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1464 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1465 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1466 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1467 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1468 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1469 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1470 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1471 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1472 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1473 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1474 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1475 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1476 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, const Supported ),
1477 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1478 ( "strictness", Opt_Strictness, const Supported ),
1479 ( "specialise", Opt_Specialise, const Supported ),
1480 ( "float-in", Opt_FloatIn, const Supported ),
1481 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1482 ( "full-laziness", Opt_FullLaziness, const Supported ),
1483 ( "liberate-case", Opt_LiberateCase, const Supported ),
1484 ( "spec-constr", Opt_SpecConstr, const Supported ),
1485 ( "cse", Opt_CSE, const Supported ),
1486 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1487 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1488 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, const Supported ),
1489 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1490 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1491 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1492 ( "case-merge", Opt_CaseMerge, const Supported ),
1493 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1494 ( "method-sharing", Opt_MethodSharing, const Supported ),
1495 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1496 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1497 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1498 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1499 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1500 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1501 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1502 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1503 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1504 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1505 ( "break-on-error", Opt_BreakOnError, const Supported ),
1506 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1507 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1508 ( "run-cps", Opt_RunCPS, const Supported ),
1509 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1510 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1511 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1512 ( "vectorise", Opt_Vectorise, const Supported ),
1513 ( "regs-graph", Opt_RegsGraph, const Supported ),
1514 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1515 ( "th", Opt_TemplateHaskell,
1516 deprecatedForLanguage "TemplateHaskell" ),
1517 ( "fi", Opt_ForeignFunctionInterface,
1518 deprecatedForLanguage "ForeignFunctionInterface" ),
1519 ( "ffi", Opt_ForeignFunctionInterface,
1520 deprecatedForLanguage "ForeignFunctionInterface" ),
1521 ( "arrows", Opt_Arrows,
1522 deprecatedForLanguage "Arrows" ),
1523 ( "generics", Opt_Generics,
1524 deprecatedForLanguage "Generics" ),
1525 ( "implicit-prelude", Opt_ImplicitPrelude,
1526 deprecatedForLanguage "ImplicitPrelude" ),
1527 ( "bang-patterns", Opt_BangPatterns,
1528 deprecatedForLanguage "BangPatterns" ),
1529 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1530 deprecatedForLanguage "MonomorphismRestriction" ),
1531 ( "mono-pat-binds", Opt_MonoPatBinds,
1532 deprecatedForLanguage "MonoPatBinds" ),
1533 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1534 deprecatedForLanguage "ExtendedDefaultRules" ),
1535 ( "implicit-params", Opt_ImplicitParams,
1536 deprecatedForLanguage "ImplicitParams" ),
1537 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1538 deprecatedForLanguage "ScopedTypeVariables" ),
1540 deprecatedForLanguage "PArr" ),
1541 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1542 deprecatedForLanguage "OverlappingInstances" ),
1543 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1544 deprecatedForLanguage "UndecidableInstances" ),
1545 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1546 deprecatedForLanguage "IncoherentInstances" ),
1547 ( "gen-manifest", Opt_GenManifest, const Supported ),
1548 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1549 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1550 ( "shared-implib", Opt_SharedImplib, const Supported ),
1551 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1552 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1555 supportedLanguages :: [String]
1556 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1558 -- This may contain duplicates
1559 languageOptions :: [DynFlag]
1560 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1562 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1563 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1565 ( "CPP", Opt_Cpp, const Supported ),
1566 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1567 ( "TupleSections", Opt_TupleSections, const Supported ),
1568 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1569 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1570 ( "MagicHash", Opt_MagicHash, const Supported ),
1571 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1572 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1573 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1574 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1575 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1576 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1577 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1578 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1579 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1580 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1581 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1582 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1583 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1584 const $ Deprecated "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1585 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1586 ( "RecursiveDo", Opt_RecursiveDo,
1587 deprecatedForLanguage "DoRec"),
1588 ( "DoRec", Opt_DoRec, const Supported ),
1589 ( "Arrows", Opt_Arrows, const Supported ),
1590 ( "PArr", Opt_PArr, const Supported ),
1591 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1592 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1593 ( "Generics", Opt_Generics, const Supported ),
1595 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1596 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1597 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1598 ( "RecordPuns", Opt_RecordPuns,
1599 deprecatedForLanguage "NamedFieldPuns" ),
1600 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1601 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1602 ( "GADTs", Opt_GADTs, const Supported ),
1603 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1604 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1605 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1607 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1609 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1610 -- On by default (which is not strictly H98):
1611 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1612 ( "ExplicitForAll", Opt_ExplicitForAll, const Supported ),
1613 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, const Supported ),
1614 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, const Supported ),
1615 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1616 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1617 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1618 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1619 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1621 ( "PatternSignatures", Opt_ScopedTypeVariables,
1622 deprecatedForLanguage "ScopedTypeVariables" ),
1624 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1625 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1626 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1627 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1628 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1629 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1630 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1631 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1632 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1633 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1634 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1635 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1636 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1637 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1638 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1639 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1640 ( "PackageImports", Opt_PackageImports, const Supported ),
1641 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1644 impliedFlags :: [(DynFlag, DynFlag)]
1646 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1647 , (Opt_Rank2Types, Opt_ExplicitForAll)
1648 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1649 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1650 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1651 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1653 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1654 -- be completely rigid for GADTs
1656 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1657 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1658 -- all over the place
1660 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1661 -- Note [Scoped tyvars] in TcBinds
1662 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1664 -- Record wild-cards implies field disambiguation
1665 -- Otherwise if you write (C {..}) you may well get
1666 -- stuff like " 'a' not in scope ", which is a bit silly
1667 -- if the compiler has just filled in field 'a' of constructor 'C'
1668 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1671 glasgowExtsFlags :: [DynFlag]
1672 glasgowExtsFlags = [
1673 Opt_PrintExplicitForalls
1674 , Opt_ForeignFunctionInterface
1675 , Opt_UnliftedFFITypes
1677 , Opt_ImplicitParams
1678 , Opt_ScopedTypeVariables
1680 , Opt_TypeSynonymInstances
1681 , Opt_StandaloneDeriving
1682 , Opt_DeriveDataTypeable
1684 , Opt_DeriveFoldable
1685 , Opt_DeriveTraversable
1686 , Opt_FlexibleContexts
1687 , Opt_FlexibleInstances
1688 , Opt_ConstrainedClassMethods
1689 , Opt_MultiParamTypeClasses
1690 , Opt_FunctionalDependencies
1692 , Opt_PolymorphicComponents
1693 , Opt_ExistentialQuantification
1695 , Opt_PostfixOperators
1697 , Opt_LiberalTypeSynonyms
1701 , Opt_ParallelListComp
1702 , Opt_EmptyDataDecls
1703 , Opt_KindSignatures
1704 , Opt_GeneralizedNewtypeDeriving
1705 , Opt_TypeFamilies ]
1707 -- -----------------------------------------------------------------------------
1708 -- Parsing the dynamic flags.
1710 -- | Parse dynamic flags from a list of command line arguments. Returns the
1711 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1712 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1713 -- flags or missing arguments).
1714 parseDynamicFlags :: Monad m =>
1715 DynFlags -> [Located String]
1716 -> m (DynFlags, [Located String], [Located String])
1717 -- ^ Updated 'DynFlags', left-over arguments, and
1718 -- list of warnings.
1719 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1721 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1722 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1723 parseDynamicNoPackageFlags :: Monad m =>
1724 DynFlags -> [Located String]
1725 -> m (DynFlags, [Located String], [Located String])
1726 -- ^ Updated 'DynFlags', left-over arguments, and
1727 -- list of warnings.
1728 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1730 parseDynamicFlags_ :: Monad m =>
1731 DynFlags -> [Located String] -> Bool
1732 -> m (DynFlags, [Located String], [Located String])
1733 parseDynamicFlags_ dflags0 args pkg_flags = do
1734 -- XXX Legacy support code
1735 -- We used to accept things like
1736 -- optdep-f -optdepdepend
1737 -- optdep-f -optdep depend
1738 -- optdep -f -optdepdepend
1739 -- optdep -f -optdep depend
1740 -- but the spaces trip up proper argument handling. So get rid of them.
1741 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1742 f (x : xs) = x : f xs
1746 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1747 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1748 | otherwise = dynamic_flags
1750 let ((leftover, errs, warns), dflags1)
1751 = runCmdLine (processArgs flag_spec args') dflags0
1752 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1754 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1755 -- isn't up to the job. We know that if hscTarget == HscC, then the
1756 -- user has explicitly used -fvia-C, because -fasm is the default,
1757 -- unless there is no NCG on this platform. The latter case is
1758 -- checked when the -fPIC flag is parsed.
1760 let (pic_warns, dflags2) =
1761 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1762 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1763 dflags1{ hscTarget = HscAsm })
1766 return (dflags2, leftover, pic_warns ++ warns)
1768 type DynP = CmdLineP DynFlags
1770 upd :: (DynFlags -> DynFlags) -> DynP ()
1772 dfs <- getCmdLineState
1773 putCmdLineState $! (f dfs)
1775 --------------------------
1776 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1777 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1778 ; mapM_ setDynFlag deps }
1780 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1781 -- When you set f, set the ones it implies
1782 -- NB: use setDynFlag recursively, in case the implied flags
1783 -- implies further flags
1784 -- When you un-set f, however, we don't un-set the things it implies
1785 -- (except for -fno-glasgow-exts, which is treated specially)
1787 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1789 --------------------------
1790 setDumpFlag :: DynFlag -> OptKind DynP
1791 setDumpFlag dump_flag
1792 = NoArg (do { setDynFlag dump_flag
1793 ; when want_recomp forceRecompile })
1795 -- Certain dumpy-things are really interested in what's going
1796 -- on during recompilation checking, so in those cases we
1797 -- don't want to turn it off.
1798 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1799 Opt_D_dump_hi_diffs]
1801 forceRecompile :: DynP ()
1802 -- Whenver we -ddump, force recompilation (by switching off the
1803 -- recompilation checker), else you don't see the dump! However,
1804 -- don't switch it off in --make mode, else *everything* gets
1805 -- recompiled which probably isn't what you want
1806 forceRecompile = do { dfs <- getCmdLineState
1807 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1809 force_recomp dfs = isOneShot (ghcMode dfs)
1811 setVerboseCore2Core :: DynP ()
1812 setVerboseCore2Core = do forceRecompile
1813 setDynFlag Opt_D_verbose_core2core
1814 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1817 setDumpSimplPhases :: String -> DynP ()
1818 setDumpSimplPhases s = do forceRecompile
1819 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1821 spec = case s of { ('=' : s') -> s'; _ -> s }
1823 setVerbosity :: Maybe Int -> DynP ()
1824 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1826 addCmdlineHCInclude :: String -> DynP ()
1827 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1829 extraPkgConf_ :: FilePath -> DynP ()
1830 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1832 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1834 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1836 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1838 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1840 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1842 setPackageName :: String -> DynFlags -> DynFlags
1843 setPackageName p s = s{ thisPackage = stringToPackageId p }
1845 -- If we're linking a binary, then only targets that produce object
1846 -- code are allowed (requests for other target types are ignored).
1847 setTarget :: HscTarget -> DynP ()
1848 setTarget l = upd set
1851 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1854 -- Changes the target only if we're compiling object code. This is
1855 -- used by -fasm and -fvia-C, which switch from one to the other, but
1856 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1857 -- can be safely used in an OPTIONS_GHC pragma.
1858 setObjTarget :: HscTarget -> DynP ()
1859 setObjTarget l = upd set
1862 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1865 setOptLevel :: Int -> DynFlags -> DynFlags
1866 setOptLevel n dflags
1867 | hscTarget dflags == HscInterpreted && n > 0
1869 -- not in IO any more, oh well:
1870 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1872 = updOptLevel n dflags
1875 -- -Odph is equivalent to
1877 -- -O2 optimise as much as possible
1878 -- -fno-method-sharing sharing specialisation defeats fusion
1880 -- -fdicts-cheap always inline dictionaries
1881 -- -fmax-simplifier-iterations20 this is necessary sometimes
1882 -- -fsimplifier-phases=3 we use an additional simplifier phase
1884 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1885 -- -fno-spec-constr-count SpecConstr as much as possible
1886 -- -finline-enough-args hack to prevent excessive inlining
1888 setDPHOpt :: DynFlags -> DynFlags
1889 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1891 , specConstrThreshold = Nothing
1892 , specConstrCount = Nothing
1894 `dopt_set` Opt_DictsCheap
1895 `dopt_unset` Opt_MethodSharing
1897 data DPHBackend = DPHPar
1900 deriving(Eq, Ord, Enum, Show)
1902 setDPHBackend :: DPHBackend -> DynP ()
1903 setDPHBackend backend
1905 upd $ \dflags -> dflags { dphBackend = backend }
1906 mapM_ exposePackage (dph_packages backend)
1908 dph_packages DPHThis = []
1909 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1910 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1912 dphPackage :: DynFlags -> PackageId
1913 dphPackage dflags = case dphBackend dflags of
1914 DPHPar -> dphParPackageId
1915 DPHSeq -> dphSeqPackageId
1916 DPHThis -> thisPackage dflags
1918 setMainIs :: String -> DynP ()
1920 | not (null main_fn) && isLower (head main_fn)
1921 -- The arg looked like "Foo.Bar.baz"
1922 = upd $ \d -> d{ mainFunIs = Just main_fn,
1923 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1925 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1926 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1928 | otherwise -- The arg looked like "baz"
1929 = upd $ \d -> d{ mainFunIs = Just arg }
1931 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1933 -----------------------------------------------------------------------------
1934 -- Paths & Libraries
1936 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1938 -- -i on its own deletes the import paths
1939 addImportPath "" = upd (\s -> s{importPaths = []})
1940 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1944 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1947 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1949 addFrameworkPath p =
1950 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1952 #ifndef mingw32_TARGET_OS
1953 split_marker :: Char
1954 split_marker = ':' -- not configurable (ToDo)
1957 splitPathList :: String -> [String]
1958 splitPathList s = filter notNull (splitUp s)
1959 -- empty paths are ignored: there might be a trailing
1960 -- ':' in the initial list, for example. Empty paths can
1961 -- cause confusion when they are translated into -I options
1962 -- for passing to gcc.
1964 #ifndef mingw32_TARGET_OS
1965 splitUp xs = split split_marker xs
1967 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1969 -- That is, if "foo:bar:baz" is used, this interpreted as
1970 -- consisting of three entries, 'foo', 'bar', 'baz'.
1971 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1972 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1974 -- Notice that no attempt is made to fully replace the 'standard'
1975 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1976 -- that this will cause too much breakage for users & ':' will
1977 -- work fine even with DOS paths, if you're not insisting on being silly.
1980 splitUp (x:':':div:xs) | div `elem` dir_markers
1981 = ((x:':':div:p): splitUp rs)
1983 (p,rs) = findNextPath xs
1984 -- we used to check for existence of the path here, but that
1985 -- required the IO monad to be threaded through the command-line
1986 -- parser which is quite inconvenient. The
1987 splitUp xs = cons p (splitUp rs)
1989 (p,rs) = findNextPath xs
1994 -- will be called either when we've consumed nought or the
1995 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1996 -- finding the next split marker.
1998 case break (`elem` split_markers) xs of
1999 (p, _:ds) -> (p, ds)
2002 split_markers :: [Char]
2003 split_markers = [':', ';']
2005 dir_markers :: [Char]
2006 dir_markers = ['/', '\\']
2009 -- -----------------------------------------------------------------------------
2010 -- tmpDir, where we store temporary files.
2012 setTmpDir :: FilePath -> DynFlags -> DynFlags
2013 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2014 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2015 -- seem necessary now --SDM 7/2/2008
2017 -----------------------------------------------------------------------------
2020 setRtsOpts :: String -> DynP ()
2021 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2023 -----------------------------------------------------------------------------
2026 setOptHpcDir :: String -> DynP ()
2027 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2029 -----------------------------------------------------------------------------
2030 -- Via-C compilation stuff
2032 -- There are some options that we need to pass to gcc when compiling
2033 -- Haskell code via C, but are only supported by recent versions of
2034 -- gcc. The configure script decides which of these options we need,
2035 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2036 -- read before each via-C compilation. The advantage of having these
2037 -- in a separate file is that the file can be created at install-time
2038 -- depending on the available gcc version, and even re-generated later
2039 -- if gcc is upgraded.
2041 -- The options below are not dependent on the version of gcc, only the
2044 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2045 [String]) -- for registerised HC compilations
2046 machdepCCOpts _dflags
2047 #if alpha_TARGET_ARCH
2049 #ifdef HAVE_THREADED_RTS_SUPPORT
2053 -- For now, to suppress the gcc warning "call-clobbered
2054 -- register used for global register variable", we simply
2055 -- disable all warnings altogether using the -w flag. Oh well.
2057 #elif hppa_TARGET_ARCH
2058 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2059 -- (very nice, but too bad the HP /usr/include files don't agree.)
2060 = ( ["-D_HPUX_SOURCE"], [] )
2062 #elif m68k_TARGET_ARCH
2063 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2064 -- popping of args to routines to be explicit; if we let things
2065 -- be deferred 'til after an STGJUMP, imminent death is certain!
2067 -- -fomit-frame-pointer : *don't*
2068 -- It's better to have a6 completely tied up being a frame pointer
2069 -- rather than let GCC pick random things to do with it.
2070 -- (If we want to steal a6, then we would try to do things
2071 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2072 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2074 #elif i386_TARGET_ARCH
2075 -- -fno-defer-pop : basically the same game as for m68k
2077 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2078 -- the fp (%ebp) for our register maps.
2079 = let n_regs = stolen_x86_regs _dflags
2082 #if darwin_TARGET_OS
2083 -- By default, gcc on OS X will generate SSE
2084 -- instructions, which need things 16-byte aligned,
2085 -- but we don't 16-byte align things. Thus drop
2086 -- back to generic i686 compatibility. Trac #2983.
2088 -- Since Snow Leopard (10.6), gcc defaults to x86_64.
2089 ["-march=i686", "-m32"],
2091 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2095 "-fomit-frame-pointer",
2096 -- we want -fno-builtin, because when gcc inlines
2097 -- built-in functions like memcpy() it tends to
2098 -- run out of registers, requiring -monly-n-regs
2100 "-DSTOLEN_X86_REGS="++show n_regs ]
2103 #elif ia64_TARGET_ARCH
2104 = ( [], ["-fomit-frame-pointer", "-G0"] )
2106 #elif x86_64_TARGET_ARCH
2108 #if darwin_TARGET_OS
2113 ["-fomit-frame-pointer",
2114 "-fno-asynchronous-unwind-tables",
2115 -- the unwind tables are unnecessary for HC code,
2116 -- and get in the way of -split-objs. Another option
2117 -- would be to throw them away in the mangler, but this
2120 -- calling builtins like strlen() using the FFI can
2121 -- cause gcc to run out of regs, so use the external
2125 #elif sparc_TARGET_ARCH
2127 -- For now, to suppress the gcc warning "call-clobbered
2128 -- register used for global register variable", we simply
2129 -- disable all warnings altogether using the -w flag. Oh well.
2131 #elif powerpc_apple_darwin_TARGET
2133 -- Disable Apple's precompiling preprocessor. It's a great thing
2134 -- for "normal" programs, but it doesn't support register variable
2136 = ( [], ["-no-cpp-precomp"] )
2141 picCCOpts :: DynFlags -> [String]
2143 #if darwin_TARGET_OS
2144 -- Apple prefers to do things the other way round.
2145 -- PIC is on by default.
2146 -- -mdynamic-no-pic:
2147 -- Turn off PIC code generation.
2149 -- Don't generate "common" symbols - these are unwanted
2150 -- in dynamic libraries.
2153 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2155 = ["-mdynamic-no-pic"]
2156 #elif mingw32_TARGET_OS
2157 -- no -fPIC for Windows
2159 = ["-U __PIC__","-D__PIC__"]
2163 | opt_PIC || not opt_Static
2164 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2169 -- -----------------------------------------------------------------------------
2173 can_split = cSplitObjs == "YES"
2175 -- -----------------------------------------------------------------------------
2178 data Printable = String String
2179 | FromDynFlags (DynFlags -> String)
2181 compilerInfo :: [(String, Printable)]
2182 compilerInfo = [("Project name", String cProjectName),
2183 ("Project version", String cProjectVersion),
2184 ("Booter version", String cBooterVersion),
2185 ("Stage", String cStage),
2186 ("Have interpreter", String cGhcWithInterpreter),
2187 ("Object splitting", String cSplitObjs),
2188 ("Have native code generator", String cGhcWithNativeCodeGen),
2189 ("Support SMP", String cGhcWithSMP),
2190 ("Unregisterised", String cGhcUnregisterised),
2191 ("Tables next to code", String cGhcEnableTablesNextToCode),
2192 ("RTS ways", String cGhcRTSWays),
2193 ("Leading underscore", String cLeadingUnderscore),
2194 ("Debug on", String (show debugIsOn)),
2195 ("LibDir", FromDynFlags topDir)