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,
697 Opt_AutoLinkPackages,
698 Opt_ReadUserPackageConf,
700 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
701 -- behaviour the default, to see if anyone notices
705 Opt_MonomorphismRestriction,
716 Opt_PrintBindContents
718 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
719 -- The default -O0 options
722 log_action = \severity srcSpan style msg ->
724 SevInfo -> printErrs (msg style)
725 SevFatal -> printErrs (msg style)
728 printErrs ((mkLocMessage srcSpan msg) style)
729 -- careful (#2302): printErrs prints in UTF-8, whereas
730 -- converting to string first and using hPutStr would
731 -- just emit the low 8 bits of each unicode char.
735 Note [Verbosity levels]
736 ~~~~~~~~~~~~~~~~~~~~~~~
737 0 | print errors & warnings only
738 1 | minimal verbosity: print "compiling M ... done." for each module.
739 2 | equivalent to -dshow-passes
740 3 | equivalent to existing "ghc -v"
741 4 | "ghc -v -ddump-most"
742 5 | "ghc -v -ddump-all"
745 -- | Test whether a 'DynFlag' is set
746 dopt :: DynFlag -> DynFlags -> Bool
747 dopt f dflags = f `elem` (flags dflags)
750 dopt_set :: DynFlags -> DynFlag -> DynFlags
751 dopt_set dfs f = dfs{ flags = f : flags dfs }
753 -- | Unset a 'DynFlag'
754 dopt_unset :: DynFlags -> DynFlag -> DynFlags
755 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
757 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
758 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
759 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
760 -> [a] -- ^ Correctly ordered extracted options
761 getOpts dflags opts = reverse (opts dflags)
762 -- We add to the options from the front, so we need to reverse the list
764 -- | Gets the verbosity flag for the current verbosity level. This is fed to
765 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
766 getVerbFlag :: DynFlags -> String
768 | verbosity dflags >= 3 = "-v"
771 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
772 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
773 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
774 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
775 addCmdlineFramework, addHaddockOpts
776 :: String -> DynFlags -> DynFlags
777 setOutputFile, setOutputHi, setDumpPrefixForce
778 :: Maybe String -> DynFlags -> DynFlags
780 setObjectDir f d = d{ objectDir = Just f}
781 setHiDir f d = d{ hiDir = Just f}
782 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
783 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
784 -- \#included from the .hc file when compiling with -fvia-C.
785 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
786 setDylibInstallName f d = d{ dylibInstallName = Just f}
788 setObjectSuf f d = d{ objectSuf = f}
789 setHiSuf f d = d{ hiSuf = f}
790 setHcSuf f d = d{ hcSuf = f}
792 setOutputFile f d = d{ outputFile = f}
793 setOutputHi f d = d{ outputHi = f}
795 parseDynLibLoaderMode f d =
797 ("deploy", "") -> d{ dynLibLoader = Deployable }
798 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
799 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
800 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
801 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
802 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
804 setDumpPrefixForce f d = d { dumpPrefixForce = f}
806 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
807 -- Config.hs should really use Option.
808 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
810 setPgmL f d = d{ pgm_L = f}
811 setPgmF f d = d{ pgm_F = f}
812 setPgmc f d = d{ pgm_c = (f,[])}
813 setPgmm f d = d{ pgm_m = (f,[])}
814 setPgms f d = d{ pgm_s = (f,[])}
815 setPgma f d = d{ pgm_a = (f,[])}
816 setPgml f d = d{ pgm_l = (f,[])}
817 setPgmdll f d = d{ pgm_dll = (f,[])}
818 setPgmwindres f d = d{ pgm_windres = f}
820 addOptL f d = d{ opt_L = f : opt_L d}
821 addOptP f d = d{ opt_P = f : opt_P d}
822 addOptF f d = d{ opt_F = f : opt_F d}
823 addOptc f d = d{ opt_c = f : opt_c d}
824 addOptm f d = d{ opt_m = f : opt_m d}
825 addOpta f d = d{ opt_a = f : opt_a d}
826 addOptl f d = d{ opt_l = f : opt_l d}
827 addOptwindres f d = d{ opt_windres = f : opt_windres d}
829 setDepMakefile :: FilePath -> DynFlags -> DynFlags
830 setDepMakefile f d = d { depMakefile = deOptDep f }
832 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
833 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
835 addDepExcludeMod :: String -> DynFlags -> DynFlags
837 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
839 addDepSuffix :: FilePath -> DynFlags -> DynFlags
840 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
843 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
844 -- we need to strip the "-optdep" off of the arg
845 deOptDep :: String -> String
846 deOptDep x = case stripPrefix "-optdep" x of
850 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
852 addHaddockOpts f d = d{ haddockOptions = Just f}
854 -- -----------------------------------------------------------------------------
855 -- Command-line options
857 -- | When invoking external tools as part of the compilation pipeline, we
858 -- pass these a sequence of options on the command-line. Rather than
859 -- just using a list of Strings, we use a type that allows us to distinguish
860 -- between filepaths and 'other stuff'. The reason for this is that
861 -- this type gives us a handle on transforming filenames, and filenames only,
862 -- to whatever format they're expected to be on a particular platform.
864 = FileOption -- an entry that _contains_ filename(s) / filepaths.
865 String -- a non-filepath prefix that shouldn't be
866 -- transformed (e.g., "/out=")
867 String -- the filepath/filename portion
870 showOpt :: Option -> String
871 showOpt (FileOption pre f) = pre ++ f
872 showOpt (Option s) = s
874 -----------------------------------------------------------------------------
875 -- Setting the optimisation level
877 updOptLevel :: Int -> DynFlags -> DynFlags
878 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
880 = dfs2{ optLevel = final_n }
882 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
883 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
884 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
886 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
887 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
889 optLevelFlags :: [([Int], DynFlag)]
891 = [ ([0], Opt_IgnoreInterfacePragmas)
892 , ([0], Opt_OmitInterfacePragmas)
894 , ([1,2], Opt_IgnoreAsserts)
895 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
897 , ([1,2], Opt_DoEtaReduction)
898 , ([1,2], Opt_CaseMerge)
899 , ([1,2], Opt_Strictness)
901 , ([1,2], Opt_FullLaziness)
902 , ([1,2], Opt_Specialise)
903 , ([1,2], Opt_FloatIn)
905 , ([2], Opt_LiberateCase)
906 , ([2], Opt_SpecConstr)
908 -- , ([2], Opt_StaticArgumentTransformation)
909 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
910 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
911 -- several improvements to the heuristics, and I'm concerned that without
912 -- those changes SAT will interfere with some attempts to write "high
913 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
914 -- this year. In particular, the version in HEAD lacks the tail call
915 -- criterion, so many things that look like reasonable loops will be
916 -- turned into functions with extra (unneccesary) thunk creation.
918 , ([0,1,2], Opt_DoLambdaEtaExpansion)
919 -- This one is important for a tiresome reason:
920 -- we want to make sure that the bindings for data
921 -- constructors are eta-expanded. This is probably
922 -- a good thing anyway, but it seems fragile.
925 -- -----------------------------------------------------------------------------
926 -- Standard sets of warning options
928 standardWarnings :: [DynFlag]
930 = [ Opt_WarnWarningsDeprecations,
931 Opt_WarnDeprecatedFlags,
932 Opt_WarnUnrecognisedPragmas,
933 Opt_WarnOverlappingPatterns,
934 Opt_WarnMissingFields,
935 Opt_WarnMissingMethods,
936 Opt_WarnDuplicateExports,
937 Opt_WarnLazyUnliftedBindings,
938 Opt_WarnDodgyForeignImports,
940 Opt_WarnAlternativeLayoutRuleTransitional
943 minusWOpts :: [DynFlag]
945 = standardWarnings ++
946 [ Opt_WarnUnusedBinds,
947 Opt_WarnUnusedMatches,
948 Opt_WarnUnusedImports,
949 Opt_WarnIncompletePatterns,
950 Opt_WarnDodgyExports,
954 minusWallOpts :: [DynFlag]
957 [ Opt_WarnTypeDefaults,
958 Opt_WarnNameShadowing,
965 -- minuswRemovesOpts should be every warning option
966 minuswRemovesOpts :: [DynFlag]
969 [Opt_WarnImplicitPrelude,
970 Opt_WarnIncompletePatternsRecUpd,
971 Opt_WarnSimplePatterns,
972 Opt_WarnMonomorphism,
973 Opt_WarnUnrecognisedPragmas,
977 -- -----------------------------------------------------------------------------
978 -- StgToDo: abstraction of stg-to-stg passes to run.
981 = StgDoMassageForProfiling -- should be (next to) last
982 -- There's also setStgVarInfo, but its absolute "lastness"
983 -- is so critical that it is hardwired in (no flag).
986 getStgToDo :: DynFlags -> [StgToDo]
990 stg_stats = dopt Opt_StgStats dflags
992 todo1 = if stg_stats then [D_stg_stats] else []
994 todo2 | WayProf `elem` wayNames dflags
995 = StgDoMassageForProfiling : todo1
999 -- -----------------------------------------------------------------------------
1002 allFlags :: [String]
1003 allFlags = map ('-':) $
1004 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1005 map ("fno-"++) flags ++
1006 map ("f"++) flags ++
1007 map ("X"++) supportedLanguages ++
1008 map ("XNo"++) supportedLanguages
1009 where ok (PrefixPred _ _) = False
1011 flags = [ name | (name, _, _) <- fFlags ]
1013 dynamic_flags :: [Flag DynP]
1015 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1016 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1017 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1018 , Flag "#include" (HasArg (addCmdlineHCInclude))
1019 (Deprecated "No longer has any effect")
1020 , Flag "v" (OptIntSuffix setVerbosity) Supported
1022 ------- Specific phases --------------------------------------------
1023 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1024 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1025 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1026 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1027 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1028 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1029 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1030 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1031 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1032 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1034 , Flag "optL" (HasArg (upd . addOptL)) Supported
1035 , Flag "optP" (HasArg (upd . addOptP)) Supported
1036 , Flag "optF" (HasArg (upd . addOptF)) Supported
1037 , Flag "optc" (HasArg (upd . addOptc)) Supported
1038 , Flag "optm" (HasArg (upd . addOptm)) Supported
1039 , Flag "opta" (HasArg (upd . addOpta)) Supported
1040 , Flag "optl" (HasArg (upd . addOptl)) Supported
1041 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1044 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1047 -------- ghc -M -----------------------------------------------------
1048 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1049 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1050 (Deprecated "Use -dep-suffix instead")
1051 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1052 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1053 (Deprecated "Use -dep-makefile instead")
1054 , Flag "optdep-w" (NoArg (return ()))
1055 (Deprecated "-optdep-w doesn't do anything")
1056 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1057 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1058 (Deprecated "Use -include-pkg-deps instead")
1059 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1060 (Deprecated "Use -include-pkg-deps instead")
1061 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1062 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1063 (Deprecated "Use -exclude-module instead")
1064 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1065 (Deprecated "Use -exclude-module instead")
1067 -------- Linking ----------------------------------------------------
1068 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1070 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1071 (Deprecated "Use -c instead")
1072 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1074 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1076 , Flag "dylib-install-name" (HasArg (upd . setDylibInstallName)) Supported
1078 ------- Libraries ---------------------------------------------------
1079 , Flag "L" (Prefix addLibraryPath ) Supported
1080 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1082 ------- Frameworks --------------------------------------------------
1083 -- -framework-path should really be -F ...
1084 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1085 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1087 ------- Output Redirection ------------------------------------------
1088 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1089 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1090 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1091 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1092 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1093 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1094 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1095 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1096 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1097 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1098 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1101 ------- Keeping temporary files -------------------------------------
1102 -- These can be singular (think ghc -c) or plural (think ghc --make)
1103 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1104 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1105 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1106 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1107 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1108 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1109 -- This only makes sense as plural
1110 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1112 ------- Miscellaneous ----------------------------------------------
1113 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1114 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1115 , Flag "with-rtsopts" (HasArg setRtsOpts) Supported
1116 , Flag "rtsopts" (NoArg (setDynFlag Opt_RtsOptsEnabled)) Supported
1117 , Flag "no-rtsopts" (NoArg (unSetDynFlag Opt_RtsOptsEnabled)) Supported
1118 , Flag "main-is" (SepArg setMainIs ) Supported
1119 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1120 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1121 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1123 ------- recompilation checker --------------------------------------
1124 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1125 (Deprecated "Use -fno-force-recomp instead")
1126 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1127 (Deprecated "Use -fforce-recomp instead")
1129 ------ HsCpp opts ---------------------------------------------------
1130 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1131 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1133 ------- Include/Import Paths ----------------------------------------
1134 , Flag "I" (Prefix addIncludePath) Supported
1135 , Flag "i" (OptPrefix addImportPath ) Supported
1137 ------ Debugging ----------------------------------------------------
1138 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1140 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1142 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1144 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1146 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1148 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1150 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1152 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1154 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1156 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1158 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1160 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1162 , Flag "ddump-asm-regalloc-stages"
1163 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1165 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1167 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1169 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1171 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1173 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1175 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1177 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1179 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1181 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1183 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1185 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1187 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1189 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1191 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1193 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1195 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1197 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1199 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1201 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1203 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1205 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1207 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1209 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1211 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1213 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1215 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1217 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1219 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1221 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1223 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1225 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1227 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1229 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1231 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1232 ; setVerboseCore2Core }))
1234 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1236 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1238 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1240 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1242 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1244 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1246 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1248 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1250 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1252 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1255 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1257 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1259 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1261 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1263 , Flag "dshow-passes"
1264 (NoArg (do forceRecompile
1265 setVerbosity (Just 2)))
1267 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1270 ------ Machine dependant (-m<blah>) stuff ---------------------------
1272 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1274 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1276 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1279 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1282 ------ Warning opts -------------------------------------------------
1283 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1285 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1287 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1289 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1291 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1292 (Deprecated "Use -w instead")
1293 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1296 ------ Optimisation flags ------------------------------------------
1297 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1298 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1299 (Deprecated "Use -O0 instead")
1300 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1301 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1303 -- If the number is missing, use 1
1305 , Flag "fsimplifier-phases"
1306 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1308 , Flag "fmax-simplifier-iterations"
1309 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1312 , Flag "fspec-constr-threshold"
1313 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1315 , Flag "fno-spec-constr-threshold"
1316 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1318 , Flag "fspec-constr-count"
1319 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1321 , Flag "fno-spec-constr-count"
1322 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1324 , Flag "fliberate-case-threshold"
1325 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1327 , Flag "fno-liberate-case-threshold"
1328 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1331 , Flag "frule-check"
1332 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1334 , Flag "fcontext-stack"
1335 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1338 , Flag "fstrictness-before"
1339 (IntSuffix (\n -> upd (\dfs -> dfs{ strictnessBefore = n : strictnessBefore dfs })))
1342 ------ Profiling ----------------------------------------------------
1344 -- XXX Should the -f* flags be deprecated?
1345 -- They don't seem to be documented
1346 , Flag "fauto-sccs-on-all-toplevs"
1347 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1350 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1352 , Flag "no-auto-all"
1353 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1355 , Flag "fauto-sccs-on-exported-toplevs"
1356 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1359 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1362 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1364 , Flag "fauto-sccs-on-individual-cafs"
1365 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1368 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1371 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1374 ------ DPH flags ----------------------------------------------------
1377 (NoArg (setDPHBackend DPHSeq))
1380 (NoArg (setDPHBackend DPHPar))
1383 (NoArg (setDPHBackend DPHThis))
1386 ------ Compiler flags -----------------------------------------------
1388 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1389 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1390 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1392 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1393 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1394 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1396 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1398 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1401 ++ map (mkFlag True "f" setDynFlag ) fFlags
1402 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1403 ++ map (mkFlag True "X" setDynFlag ) xFlags
1404 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1406 package_flags :: [Flag DynP]
1408 ------- Packages ----------------------------------------------------
1409 Flag "package-conf" (HasArg extraPkgConf_) Supported
1410 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1412 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1413 , Flag "package-id" (HasArg exposePackageId) Supported
1414 , Flag "package" (HasArg exposePackage) Supported
1415 , Flag "hide-package" (HasArg hidePackage) Supported
1416 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1418 , Flag "ignore-package" (HasArg ignorePackage)
1420 , Flag "syslib" (HasArg exposePackage)
1421 (Deprecated "Use -package instead")
1424 mkFlag :: Bool -- ^ True <=> it should be turned on
1425 -> String -- ^ The flag prefix
1426 -> (DynFlag -> DynP ())
1427 -> (String, DynFlag, Bool -> Deprecated)
1429 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1430 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1432 deprecatedForLanguage :: String -> Bool -> Deprecated
1433 deprecatedForLanguage lang turn_on
1434 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1436 flag | turn_on = lang
1437 | otherwise = "No"++lang
1439 useInstead :: String -> Bool -> Deprecated
1440 useInstead flag turn_on
1441 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1443 no = if turn_on then "" else "no-"
1445 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1446 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1448 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1449 ( "warn-dodgy-exports", Opt_WarnDodgyExports, const Supported ),
1450 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1451 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1452 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1453 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1454 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1455 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1456 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1457 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1458 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1459 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1460 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1461 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1462 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1463 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1464 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1465 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1466 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1467 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1468 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1469 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1470 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1471 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1472 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1473 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings,
1474 const $ Deprecated "lazy unlifted bindings will be an error in GHC 6.14, and this flag will no longer exist"),
1475 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, const Supported ),
1476 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, const Supported ),
1477 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, const Supported ),
1478 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1479 ( "strictness", Opt_Strictness, const Supported ),
1480 ( "specialise", Opt_Specialise, const Supported ),
1481 ( "float-in", Opt_FloatIn, const Supported ),
1482 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1483 ( "full-laziness", Opt_FullLaziness, const Supported ),
1484 ( "liberate-case", Opt_LiberateCase, const Supported ),
1485 ( "spec-constr", Opt_SpecConstr, const Supported ),
1486 ( "cse", Opt_CSE, const Supported ),
1487 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1488 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1489 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, const Supported ),
1490 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1491 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1492 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1493 ( "case-merge", Opt_CaseMerge, const Supported ),
1494 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1495 ( "method-sharing", Opt_MethodSharing, const Supported ),
1496 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1497 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1498 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1499 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1500 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1501 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1502 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1503 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1504 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1505 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1506 ( "break-on-error", Opt_BreakOnError, const Supported ),
1507 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1508 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1509 ( "run-cps", Opt_RunCPS, const Supported ),
1510 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1511 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1512 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1513 ( "vectorise", Opt_Vectorise, const Supported ),
1514 ( "regs-graph", Opt_RegsGraph, const Supported ),
1515 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1516 ( "th", Opt_TemplateHaskell,
1517 deprecatedForLanguage "TemplateHaskell" ),
1518 ( "fi", Opt_ForeignFunctionInterface,
1519 deprecatedForLanguage "ForeignFunctionInterface" ),
1520 ( "ffi", Opt_ForeignFunctionInterface,
1521 deprecatedForLanguage "ForeignFunctionInterface" ),
1522 ( "arrows", Opt_Arrows,
1523 deprecatedForLanguage "Arrows" ),
1524 ( "generics", Opt_Generics,
1525 deprecatedForLanguage "Generics" ),
1526 ( "implicit-prelude", Opt_ImplicitPrelude,
1527 deprecatedForLanguage "ImplicitPrelude" ),
1528 ( "bang-patterns", Opt_BangPatterns,
1529 deprecatedForLanguage "BangPatterns" ),
1530 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1531 deprecatedForLanguage "MonomorphismRestriction" ),
1532 ( "mono-pat-binds", Opt_MonoPatBinds,
1533 deprecatedForLanguage "MonoPatBinds" ),
1534 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1535 deprecatedForLanguage "ExtendedDefaultRules" ),
1536 ( "implicit-params", Opt_ImplicitParams,
1537 deprecatedForLanguage "ImplicitParams" ),
1538 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1539 deprecatedForLanguage "ScopedTypeVariables" ),
1541 deprecatedForLanguage "PArr" ),
1542 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1543 deprecatedForLanguage "OverlappingInstances" ),
1544 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1545 deprecatedForLanguage "UndecidableInstances" ),
1546 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1547 deprecatedForLanguage "IncoherentInstances" ),
1548 ( "gen-manifest", Opt_GenManifest, const Supported ),
1549 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1550 ( "ext-core", Opt_EmitExternalCore, const Supported ),
1551 ( "shared-implib", Opt_SharedImplib, const Supported ),
1552 ( "building-cabal-package", Opt_BuildingCabalPackage, const Supported ),
1553 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1556 supportedLanguages :: [String]
1557 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1559 -- This may contain duplicates
1560 languageOptions :: [DynFlag]
1561 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1563 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1564 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1566 ( "CPP", Opt_Cpp, const Supported ),
1567 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1568 ( "TupleSections", Opt_TupleSections, const Supported ),
1569 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1570 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1571 ( "MagicHash", Opt_MagicHash, const Supported ),
1572 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1573 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1574 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1575 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1576 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1577 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1578 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1579 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1580 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, const Supported ),
1581 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1582 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1583 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1584 ( "ImpredicativeTypes", Opt_ImpredicativeTypes,
1585 const $ Deprecated "impredicative polymorphism will be simplified or removed in GHC 6.14" ),
1586 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1587 ( "RecursiveDo", Opt_RecursiveDo,
1588 deprecatedForLanguage "DoRec"),
1589 ( "DoRec", Opt_DoRec, const Supported ),
1590 ( "Arrows", Opt_Arrows, const Supported ),
1591 ( "PArr", Opt_PArr, const Supported ),
1592 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1593 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1594 ( "Generics", Opt_Generics, const Supported ),
1596 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1597 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1598 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1599 ( "RecordPuns", Opt_RecordPuns,
1600 deprecatedForLanguage "NamedFieldPuns" ),
1601 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1602 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1603 ( "GADTs", Opt_GADTs, const Supported ),
1604 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1605 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1606 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1608 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1610 ( "NPlusKPatterns", Opt_NPlusKPatterns, const Supported ),
1611 -- On by default (which is not strictly H98):
1612 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1613 ( "ExplicitForAll", Opt_ExplicitForAll, const Supported ),
1614 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, const Supported ),
1615 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, const Supported ),
1616 ( "MonoLocalBinds", Opt_MonoLocalBinds, const Supported ),
1617 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1618 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1619 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1620 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1622 ( "PatternSignatures", Opt_ScopedTypeVariables,
1623 deprecatedForLanguage "ScopedTypeVariables" ),
1625 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1626 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1627 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1628 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1629 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1630 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1631 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1632 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1633 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1634 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1635 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1636 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1637 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1638 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1639 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1640 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1641 ( "PackageImports", Opt_PackageImports, const Supported ),
1642 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1645 impliedFlags :: [(DynFlag, DynFlag)]
1647 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1648 , (Opt_Rank2Types, Opt_ExplicitForAll)
1649 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1650 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1651 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1652 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1654 , (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1655 -- be completely rigid for GADTs
1657 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1658 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1659 -- all over the place
1661 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1662 -- Note [Scoped tyvars] in TcBinds
1663 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1665 -- Record wild-cards implies field disambiguation
1666 -- Otherwise if you write (C {..}) you may well get
1667 -- stuff like " 'a' not in scope ", which is a bit silly
1668 -- if the compiler has just filled in field 'a' of constructor 'C'
1669 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1672 glasgowExtsFlags :: [DynFlag]
1673 glasgowExtsFlags = [
1674 Opt_PrintExplicitForalls
1675 , Opt_ForeignFunctionInterface
1676 , Opt_UnliftedFFITypes
1678 , Opt_ImplicitParams
1679 , Opt_ScopedTypeVariables
1681 , Opt_TypeSynonymInstances
1682 , Opt_StandaloneDeriving
1683 , Opt_DeriveDataTypeable
1685 , Opt_DeriveFoldable
1686 , Opt_DeriveTraversable
1687 , Opt_FlexibleContexts
1688 , Opt_FlexibleInstances
1689 , Opt_ConstrainedClassMethods
1690 , Opt_MultiParamTypeClasses
1691 , Opt_FunctionalDependencies
1693 , Opt_PolymorphicComponents
1694 , Opt_ExistentialQuantification
1696 , Opt_PostfixOperators
1698 , Opt_LiberalTypeSynonyms
1702 , Opt_ParallelListComp
1703 , Opt_EmptyDataDecls
1704 , Opt_KindSignatures
1705 , Opt_GeneralizedNewtypeDeriving
1706 , Opt_TypeFamilies ]
1708 -- -----------------------------------------------------------------------------
1709 -- Parsing the dynamic flags.
1711 -- | Parse dynamic flags from a list of command line arguments. Returns the
1712 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1713 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1714 -- flags or missing arguments).
1715 parseDynamicFlags :: Monad m =>
1716 DynFlags -> [Located String]
1717 -> m (DynFlags, [Located String], [Located String])
1718 -- ^ Updated 'DynFlags', left-over arguments, and
1719 -- list of warnings.
1720 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1722 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1723 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1724 parseDynamicNoPackageFlags :: Monad m =>
1725 DynFlags -> [Located String]
1726 -> m (DynFlags, [Located String], [Located String])
1727 -- ^ Updated 'DynFlags', left-over arguments, and
1728 -- list of warnings.
1729 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1731 parseDynamicFlags_ :: Monad m =>
1732 DynFlags -> [Located String] -> Bool
1733 -> m (DynFlags, [Located String], [Located String])
1734 parseDynamicFlags_ dflags0 args pkg_flags = do
1735 -- XXX Legacy support code
1736 -- We used to accept things like
1737 -- optdep-f -optdepdepend
1738 -- optdep-f -optdep depend
1739 -- optdep -f -optdepdepend
1740 -- optdep -f -optdep depend
1741 -- but the spaces trip up proper argument handling. So get rid of them.
1742 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1743 f (x : xs) = x : f xs
1747 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1748 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1749 | otherwise = dynamic_flags
1751 let ((leftover, errs, warns), dflags1)
1752 = runCmdLine (processArgs flag_spec args') dflags0
1753 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1755 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1756 -- isn't up to the job. We know that if hscTarget == HscC, then the
1757 -- user has explicitly used -fvia-C, because -fasm is the default,
1758 -- unless there is no NCG on this platform. The latter case is
1759 -- checked when the -fPIC flag is parsed.
1761 let (pic_warns, dflags2) =
1762 if opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1763 then ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1764 dflags1{ hscTarget = HscAsm })
1767 return (dflags2, leftover, pic_warns ++ warns)
1769 type DynP = CmdLineP DynFlags
1771 upd :: (DynFlags -> DynFlags) -> DynP ()
1773 dfs <- getCmdLineState
1774 putCmdLineState $! (f dfs)
1776 --------------------------
1777 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1778 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1779 ; mapM_ setDynFlag deps }
1781 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1782 -- When you set f, set the ones it implies
1783 -- NB: use setDynFlag recursively, in case the implied flags
1784 -- implies further flags
1785 -- When you un-set f, however, we don't un-set the things it implies
1786 -- (except for -fno-glasgow-exts, which is treated specially)
1788 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1790 --------------------------
1791 setDumpFlag :: DynFlag -> OptKind DynP
1792 setDumpFlag dump_flag
1793 = NoArg (do { setDynFlag dump_flag
1794 ; when want_recomp forceRecompile })
1796 -- Certain dumpy-things are really interested in what's going
1797 -- on during recompilation checking, so in those cases we
1798 -- don't want to turn it off.
1799 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1800 Opt_D_dump_hi_diffs]
1802 forceRecompile :: DynP ()
1803 -- Whenver we -ddump, force recompilation (by switching off the
1804 -- recompilation checker), else you don't see the dump! However,
1805 -- don't switch it off in --make mode, else *everything* gets
1806 -- recompiled which probably isn't what you want
1807 forceRecompile = do { dfs <- getCmdLineState
1808 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1810 force_recomp dfs = isOneShot (ghcMode dfs)
1812 setVerboseCore2Core :: DynP ()
1813 setVerboseCore2Core = do forceRecompile
1814 setDynFlag Opt_D_verbose_core2core
1815 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1818 setDumpSimplPhases :: String -> DynP ()
1819 setDumpSimplPhases s = do forceRecompile
1820 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1822 spec = case s of { ('=' : s') -> s'; _ -> s }
1824 setVerbosity :: Maybe Int -> DynP ()
1825 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1827 addCmdlineHCInclude :: String -> DynP ()
1828 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1830 extraPkgConf_ :: FilePath -> DynP ()
1831 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1833 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1835 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1837 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1839 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1841 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1843 setPackageName :: String -> DynFlags -> DynFlags
1844 setPackageName p s = s{ thisPackage = stringToPackageId p }
1846 -- If we're linking a binary, then only targets that produce object
1847 -- code are allowed (requests for other target types are ignored).
1848 setTarget :: HscTarget -> DynP ()
1849 setTarget l = upd set
1852 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1855 -- Changes the target only if we're compiling object code. This is
1856 -- used by -fasm and -fvia-C, which switch from one to the other, but
1857 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1858 -- can be safely used in an OPTIONS_GHC pragma.
1859 setObjTarget :: HscTarget -> DynP ()
1860 setObjTarget l = upd set
1863 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1866 setOptLevel :: Int -> DynFlags -> DynFlags
1867 setOptLevel n dflags
1868 | hscTarget dflags == HscInterpreted && n > 0
1870 -- not in IO any more, oh well:
1871 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1873 = updOptLevel n dflags
1876 -- -Odph is equivalent to
1878 -- -O2 optimise as much as possible
1879 -- -fno-method-sharing sharing specialisation defeats fusion
1881 -- -fdicts-cheap always inline dictionaries
1882 -- -fmax-simplifier-iterations20 this is necessary sometimes
1883 -- -fsimplifier-phases=3 we use an additional simplifier phase
1885 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1886 -- -fno-spec-constr-count SpecConstr as much as possible
1887 -- -finline-enough-args hack to prevent excessive inlining
1889 setDPHOpt :: DynFlags -> DynFlags
1890 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1892 , specConstrThreshold = Nothing
1893 , specConstrCount = Nothing
1895 `dopt_set` Opt_DictsCheap
1896 `dopt_unset` Opt_MethodSharing
1898 data DPHBackend = DPHPar
1901 deriving(Eq, Ord, Enum, Show)
1903 setDPHBackend :: DPHBackend -> DynP ()
1904 setDPHBackend backend
1906 upd $ \dflags -> dflags { dphBackend = backend }
1907 mapM_ exposePackage (dph_packages backend)
1909 dph_packages DPHThis = []
1910 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1911 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1913 dphPackage :: DynFlags -> PackageId
1914 dphPackage dflags = case dphBackend dflags of
1915 DPHPar -> dphParPackageId
1916 DPHSeq -> dphSeqPackageId
1917 DPHThis -> thisPackage dflags
1919 setMainIs :: String -> DynP ()
1921 | not (null main_fn) && isLower (head main_fn)
1922 -- The arg looked like "Foo.Bar.baz"
1923 = upd $ \d -> d{ mainFunIs = Just main_fn,
1924 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1926 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1927 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1929 | otherwise -- The arg looked like "baz"
1930 = upd $ \d -> d{ mainFunIs = Just arg }
1932 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1934 -----------------------------------------------------------------------------
1935 -- Paths & Libraries
1937 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1939 -- -i on its own deletes the import paths
1940 addImportPath "" = upd (\s -> s{importPaths = []})
1941 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1945 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1948 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1950 addFrameworkPath p =
1951 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1953 #ifndef mingw32_TARGET_OS
1954 split_marker :: Char
1955 split_marker = ':' -- not configurable (ToDo)
1958 splitPathList :: String -> [String]
1959 splitPathList s = filter notNull (splitUp s)
1960 -- empty paths are ignored: there might be a trailing
1961 -- ':' in the initial list, for example. Empty paths can
1962 -- cause confusion when they are translated into -I options
1963 -- for passing to gcc.
1965 #ifndef mingw32_TARGET_OS
1966 splitUp xs = split split_marker xs
1968 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1970 -- That is, if "foo:bar:baz" is used, this interpreted as
1971 -- consisting of three entries, 'foo', 'bar', 'baz'.
1972 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1973 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1975 -- Notice that no attempt is made to fully replace the 'standard'
1976 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1977 -- that this will cause too much breakage for users & ':' will
1978 -- work fine even with DOS paths, if you're not insisting on being silly.
1981 splitUp (x:':':div:xs) | div `elem` dir_markers
1982 = ((x:':':div:p): splitUp rs)
1984 (p,rs) = findNextPath xs
1985 -- we used to check for existence of the path here, but that
1986 -- required the IO monad to be threaded through the command-line
1987 -- parser which is quite inconvenient. The
1988 splitUp xs = cons p (splitUp rs)
1990 (p,rs) = findNextPath xs
1995 -- will be called either when we've consumed nought or the
1996 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1997 -- finding the next split marker.
1999 case break (`elem` split_markers) xs of
2000 (p, _:ds) -> (p, ds)
2003 split_markers :: [Char]
2004 split_markers = [':', ';']
2006 dir_markers :: [Char]
2007 dir_markers = ['/', '\\']
2010 -- -----------------------------------------------------------------------------
2011 -- tmpDir, where we store temporary files.
2013 setTmpDir :: FilePath -> DynFlags -> DynFlags
2014 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2015 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2016 -- seem necessary now --SDM 7/2/2008
2018 -----------------------------------------------------------------------------
2021 setRtsOpts :: String -> DynP ()
2022 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2024 -----------------------------------------------------------------------------
2027 setOptHpcDir :: String -> DynP ()
2028 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2030 -----------------------------------------------------------------------------
2031 -- Via-C compilation stuff
2033 -- There are some options that we need to pass to gcc when compiling
2034 -- Haskell code via C, but are only supported by recent versions of
2035 -- gcc. The configure script decides which of these options we need,
2036 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2037 -- read before each via-C compilation. The advantage of having these
2038 -- in a separate file is that the file can be created at install-time
2039 -- depending on the available gcc version, and even re-generated later
2040 -- if gcc is upgraded.
2042 -- The options below are not dependent on the version of gcc, only the
2045 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2046 [String]) -- for registerised HC compilations
2047 machdepCCOpts _dflags
2048 #if alpha_TARGET_ARCH
2050 #ifdef HAVE_THREADED_RTS_SUPPORT
2054 -- For now, to suppress the gcc warning "call-clobbered
2055 -- register used for global register variable", we simply
2056 -- disable all warnings altogether using the -w flag. Oh well.
2058 #elif hppa_TARGET_ARCH
2059 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2060 -- (very nice, but too bad the HP /usr/include files don't agree.)
2061 = ( ["-D_HPUX_SOURCE"], [] )
2063 #elif m68k_TARGET_ARCH
2064 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2065 -- popping of args to routines to be explicit; if we let things
2066 -- be deferred 'til after an STGJUMP, imminent death is certain!
2068 -- -fomit-frame-pointer : *don't*
2069 -- It's better to have a6 completely tied up being a frame pointer
2070 -- rather than let GCC pick random things to do with it.
2071 -- (If we want to steal a6, then we would try to do things
2072 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2073 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2075 #elif i386_TARGET_ARCH
2076 -- -fno-defer-pop : basically the same game as for m68k
2078 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2079 -- the fp (%ebp) for our register maps.
2080 = let n_regs = stolen_x86_regs _dflags
2083 #if darwin_TARGET_OS
2084 -- By default, gcc on OS X will generate SSE
2085 -- instructions, which need things 16-byte aligned,
2086 -- but we don't 16-byte align things. Thus drop
2087 -- back to generic i686 compatibility. Trac #2983.
2089 -- Since Snow Leopard (10.6), gcc defaults to x86_64.
2090 ["-march=i686", "-m32"],
2092 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2096 "-fomit-frame-pointer",
2097 -- we want -fno-builtin, because when gcc inlines
2098 -- built-in functions like memcpy() it tends to
2099 -- run out of registers, requiring -monly-n-regs
2101 "-DSTOLEN_X86_REGS="++show n_regs ]
2104 #elif ia64_TARGET_ARCH
2105 = ( [], ["-fomit-frame-pointer", "-G0"] )
2107 #elif x86_64_TARGET_ARCH
2109 #if darwin_TARGET_OS
2114 ["-fomit-frame-pointer",
2115 "-fno-asynchronous-unwind-tables",
2116 -- the unwind tables are unnecessary for HC code,
2117 -- and get in the way of -split-objs. Another option
2118 -- would be to throw them away in the mangler, but this
2121 -- calling builtins like strlen() using the FFI can
2122 -- cause gcc to run out of regs, so use the external
2126 #elif sparc_TARGET_ARCH
2128 -- For now, to suppress the gcc warning "call-clobbered
2129 -- register used for global register variable", we simply
2130 -- disable all warnings altogether using the -w flag. Oh well.
2132 #elif powerpc_apple_darwin_TARGET
2134 -- Disable Apple's precompiling preprocessor. It's a great thing
2135 -- for "normal" programs, but it doesn't support register variable
2137 = ( [], ["-no-cpp-precomp"] )
2142 picCCOpts :: DynFlags -> [String]
2144 #if darwin_TARGET_OS
2145 -- Apple prefers to do things the other way round.
2146 -- PIC is on by default.
2147 -- -mdynamic-no-pic:
2148 -- Turn off PIC code generation.
2150 -- Don't generate "common" symbols - these are unwanted
2151 -- in dynamic libraries.
2154 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2156 = ["-mdynamic-no-pic"]
2157 #elif mingw32_TARGET_OS
2158 -- no -fPIC for Windows
2160 = ["-U __PIC__","-D__PIC__"]
2164 | opt_PIC || not opt_Static
2165 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2170 -- -----------------------------------------------------------------------------
2174 can_split = cSplitObjs == "YES"
2176 -- -----------------------------------------------------------------------------
2179 data Printable = String String
2180 | FromDynFlags (DynFlags -> String)
2182 compilerInfo :: [(String, Printable)]
2183 compilerInfo = [("Project name", String cProjectName),
2184 ("Project version", String cProjectVersion),
2185 ("Booter version", String cBooterVersion),
2186 ("Stage", String cStage),
2187 ("Have interpreter", String cGhcWithInterpreter),
2188 ("Object splitting", String cSplitObjs),
2189 ("Have native code generator", String cGhcWithNativeCodeGen),
2190 ("Support SMP", String cGhcWithSMP),
2191 ("Unregisterised", String cGhcUnregisterised),
2192 ("Tables next to code", String cGhcEnableTablesNextToCode),
2193 ("Win32 DLLs", String cEnableWin32DLLs),
2194 ("RTS ways", String cGhcRTSWays),
2195 ("Leading underscore", String cLeadingUnderscore),
2196 ("Debug on", String (show debugIsOn)),
2197 ("LibDir", FromDynFlags topDir)