2 -- Temporary, until rtsIsProfiled is fixed
8 -- (c) The University of Glasgow 2005
11 -- Most flags are dynamic flags, which means they can change from
12 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
13 -- multi-session GHC each session can be using different dynamic
14 -- flags. Dynamic flags can also be set at the prompt in GHCi.
16 -- * Dynamic flags and associated configuration types
28 HscTarget(..), isObjectTarget, defaultObjectTarget,
29 GhcMode(..), isOneShot,
30 GhcLink(..), isNoLink,
34 fFlags, fLangFlags, xFlags,
35 DPHBackend(..), dphPackageMaybe,
38 -- ** Manipulating DynFlags
39 defaultDynFlags, -- DynFlags
40 initDynFlags, -- DynFlags -> IO DynFlags
42 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
49 -- ** Parsing DynFlags
51 parseDynamicNoPackageFlags,
54 supportedLanguagesAndExtensions,
56 -- ** DynFlag C compiler options
57 machdepCCOpts, picCCOpts,
59 -- * Configuration of the stg-to-stg passes
63 -- * Compiler configuration suitable for display to the user
67 -- Only in stage 2 can we be sure that the RTS
68 -- exposes the appropriate runtime boolean
73 #include "HsVersions.h"
75 #ifndef OMIT_NATIVE_CODEGEN
80 import PrelNames ( mAIN )
82 import {-# SOURCE #-} Packages (PackageState)
83 import DriverPhases ( Phase(..), phaseInputExt )
86 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
89 import Maybes ( orElse )
93 import Foreign.C ( CInt )
94 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
96 import System.IO.Unsafe ( unsafePerformIO )
98 import Control.Monad ( when )
102 import Data.Map (Map)
103 import qualified Data.Map as Map
105 import System.FilePath
106 import System.IO ( stderr, hPutChar )
108 -- -----------------------------------------------------------------------------
111 -- | Enumerates the simple on-or-off dynamic flags
117 | Opt_D_dump_cmmz_pretty
121 | Opt_D_dump_asm_native
122 | Opt_D_dump_asm_liveness
123 | Opt_D_dump_asm_coalesce
124 | Opt_D_dump_asm_regalloc
125 | Opt_D_dump_asm_regalloc_stages
126 | Opt_D_dump_asm_conflicts
127 | Opt_D_dump_asm_stats
128 | Opt_D_dump_asm_expanded
135 | Opt_D_dump_inlinings
136 | Opt_D_dump_rule_firings
137 | Opt_D_dump_rule_rewrites
138 | Opt_D_dump_occur_anal
142 | Opt_D_dump_simpl_iterations
143 | Opt_D_dump_simpl_phases
152 | Opt_D_dump_worker_wrapper
153 | Opt_D_dump_rn_trace
154 | Opt_D_dump_rn_stats
156 | Opt_D_dump_simpl_stats
157 | Opt_D_dump_cs_trace -- Constraint solver in type checker
158 | Opt_D_dump_tc_trace
159 | Opt_D_dump_if_trace
160 | Opt_D_dump_vt_trace
167 | Opt_D_verbose_core2core
168 | Opt_D_verbose_stg2stg
170 | Opt_D_dump_hi_diffs
171 | Opt_D_dump_minimal_imports
172 | Opt_D_dump_mod_cycles
173 | Opt_D_dump_view_pattern_commoning
174 | Opt_D_faststring_stats
175 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
176 | Opt_D_no_debug_output
182 | Opt_WarnIsError -- -Werror; makes warnings fatal
183 | Opt_WarnDuplicateExports
185 | Opt_WarnImplicitPrelude
186 | Opt_WarnIncompletePatterns
187 | Opt_WarnIncompleteUniPatterns
188 | Opt_WarnIncompletePatternsRecUpd
189 | Opt_WarnMissingFields
190 | Opt_WarnMissingImportList
191 | Opt_WarnMissingMethods
192 | Opt_WarnMissingSigs
193 | Opt_WarnMissingLocalSigs
194 | Opt_WarnNameShadowing
195 | Opt_WarnOverlappingPatterns
196 | Opt_WarnTypeDefaults
197 | Opt_WarnMonomorphism
198 | Opt_WarnUnusedBinds
199 | Opt_WarnUnusedImports
200 | Opt_WarnUnusedMatches
201 | Opt_WarnWarningsDeprecations
202 | Opt_WarnDeprecatedFlags
203 | Opt_WarnDodgyExports
204 | Opt_WarnDodgyImports
206 | Opt_WarnAutoOrphans
209 | Opt_WarnUnrecognisedPragmas
210 | Opt_WarnDodgyForeignImports
211 | Opt_WarnLazyUnliftedBindings
212 | Opt_WarnUnusedDoBind
213 | Opt_WarnWrongDoBind
214 | Opt_WarnAlternativeLayoutRuleTransitional
216 | Opt_PrintExplicitForalls
223 | Opt_StaticArgumentTransformation
227 | Opt_DoLambdaEtaExpansion
231 | Opt_UnboxStrictFields
232 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
234 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
236 | Opt_RegsGraph -- do graph coloring register allocation
237 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
240 | Opt_IgnoreInterfacePragmas
241 | Opt_OmitInterfacePragmas
242 | Opt_ExposeAllUnfoldings
245 | Opt_AutoSccsOnAllToplevs
246 | Opt_AutoSccsOnExportedToplevs
247 | Opt_AutoSccsOnIndividualCafs
254 | Opt_ExcessPrecision
255 | Opt_EagerBlackHoling
256 | Opt_ReadUserPackageConf
260 | Opt_HideAllPackages
261 | Opt_PrintBindResult
265 | Opt_BreakOnException
267 | Opt_PrintEvldWithShow
268 | Opt_PrintBindContents
271 | Opt_EmitExternalCore
273 | Opt_BuildingCabalPackage
281 | Opt_ConvertToZipCfgAndBack
282 | Opt_AutoLinkPackages
283 | Opt_ImplicitImportQualified
292 | Opt_KeepRawTokenStream
297 data Language = Haskell98 | Haskell2010
301 | Opt_OverlappingInstances
302 | Opt_UndecidableInstances
303 | Opt_IncoherentInstances
304 | Opt_MonomorphismRestriction
307 | Opt_RelaxedPolyRec -- Deprecated
308 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
309 | Opt_ForeignFunctionInterface
310 | Opt_UnliftedFFITypes
311 | Opt_GHCForeignImportPrim
312 | Opt_ParallelArrays -- Syntactic support for parallel arrays
313 | Opt_Arrows -- Arrow-notation syntax
314 | Opt_TemplateHaskell
317 | Opt_Generics -- "Derivable type classes"
318 | Opt_ImplicitPrelude
319 | Opt_ScopedTypeVariables
323 | Opt_OverloadedStrings
324 | Opt_DisambiguateRecordFields
325 | Opt_RecordWildCards
331 | Opt_DoAndIfThenElse
332 | Opt_RebindableSyntax
334 | Opt_StandaloneDeriving
335 | Opt_DeriveDataTypeable
337 | Opt_DeriveTraversable
340 | Opt_TypeSynonymInstances
341 | Opt_FlexibleContexts
342 | Opt_FlexibleInstances
343 | Opt_ConstrainedClassMethods
344 | Opt_MultiParamTypeClasses
345 | Opt_FunctionalDependencies
347 | Opt_PolymorphicComponents
348 | Opt_ExistentialQuantification
352 | Opt_ParallelListComp
353 | Opt_TransformListComp
354 | Opt_GeneralizedNewtypeDeriving
357 | Opt_PostfixOperators
360 | Opt_LiberalTypeSynonyms
363 | Opt_ImpredicativeTypes
367 | Opt_AlternativeLayoutRule
368 | Opt_AlternativeLayoutRuleTransitional
369 | Opt_DatatypeContexts
370 | Opt_NondecreasingIndentation
374 -- | Contains not only a collection of 'DynFlag's but also a plethora of
375 -- information relating to the compilation of a single file or GHC session
376 data DynFlags = DynFlags {
379 hscTarget :: HscTarget,
380 hscOutName :: String, -- ^ Name of the output file
381 extCoreName :: String, -- ^ Name of the .hcr output file
382 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
383 optLevel :: Int, -- ^ Optimisation level
384 simplPhases :: Int, -- ^ Number of simplifier phases
385 maxSimplIterations :: Int, -- ^ Max simplifier iterations
386 shouldDumpSimplPhase :: Maybe String,
387 ruleCheck :: Maybe String,
388 strictnessBefore :: [Int], -- ^ Additional demand analysis
390 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
391 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
392 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
393 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
394 -- See CoreMonad.FloatOutSwitches
396 #ifndef OMIT_NATIVE_CODEGEN
397 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
399 stolen_x86_regs :: Int,
400 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
401 importPaths :: [FilePath],
403 mainFunIs :: Maybe String,
404 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
406 dphBackend :: DPHBackend,
408 thisPackage :: PackageId, -- ^ name of package currently being compiled
411 ways :: [Way], -- ^ Way flags from the command line
412 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
413 rtsBuildTag :: String, -- ^ The RTS \"way\"
415 -- For object splitting
416 splitInfo :: Maybe (String,Int),
419 objectDir :: Maybe String,
420 dylibInstallName :: Maybe String,
421 hiDir :: Maybe String,
422 stubDir :: Maybe String,
428 outputFile :: Maybe String,
429 outputHi :: Maybe String,
430 dynLibLoader :: DynLibLoader,
432 -- | This is set by 'DriverPipeline.runPipeline' based on where
433 -- its output is going.
434 dumpPrefix :: Maybe FilePath,
436 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
437 -- Set by @-ddump-file-prefix@
438 dumpPrefixForce :: Maybe FilePath,
440 includePaths :: [String],
441 libraryPaths :: [String],
442 frameworkPaths :: [String], -- used on darwin only
443 cmdlineFrameworks :: [String], -- ditto
444 tmpDir :: String, -- no trailing '/'
446 ghcUsagePath :: FilePath, -- Filled in by SysTools
447 ghciUsagePath :: FilePath, -- ditto
448 rtsOpts :: Maybe String,
449 rtsOptsEnabled :: RtsOptsEnabled,
451 hpcDir :: String, -- ^ Path to store the .mix files
453 -- options for particular phases
461 opt_windres :: [String],
462 opt_lo :: [String], -- LLVM: llvm optimiser
463 opt_lc :: [String], -- LLVM: llc static compiler
465 -- commands for particular phases
467 pgm_P :: (String,[Option]),
469 pgm_c :: (String,[Option]),
470 pgm_m :: (String,[Option]),
471 pgm_s :: (String,[Option]),
472 pgm_a :: (String,[Option]),
473 pgm_l :: (String,[Option]),
474 pgm_dll :: (String,[Option]),
476 pgm_sysman :: String,
477 pgm_windres :: String,
478 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
479 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
482 depMakefile :: FilePath,
483 depIncludePkgDeps :: Bool,
484 depExcludeMods :: [ModuleName],
485 depSuffixes :: [String],
488 extraPkgConfs :: [FilePath],
489 topDir :: FilePath, -- filled in by SysTools
490 systemPackageConfig :: FilePath, -- ditto
491 -- ^ The @-package-conf@ flags given on the command line, in the order
494 packageFlags :: [PackageFlag],
495 -- ^ The @-package@ and @-hide-package@ flags from the command-line
498 -- NB. do not modify this field, it is calculated by
499 -- Packages.initPackages and Packages.updatePackages.
500 pkgDatabase :: Maybe [PackageConfig],
501 pkgState :: PackageState,
504 -- These have to be IORefs, because the defaultCleanupHandler needs to
505 -- know what to clean when an exception happens
506 filesToClean :: IORef [FilePath],
507 dirsToClean :: IORef (Map FilePath FilePath),
511 -- Don't change this without updating extensionFlags:
512 language :: Maybe Language,
513 -- Don't change this without updating extensionFlags:
514 extensions :: [OnOff ExtensionFlag],
515 -- extensionFlags should always be equal to
516 -- flattenExtensionFlags language extensions
517 extensionFlags :: [ExtensionFlag],
519 -- | Message output action: use "ErrUtils" instead of this if you can
520 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
522 haddockOptions :: Maybe String
525 wayNames :: DynFlags -> [WayName]
526 wayNames = map wayName . ways
528 -- | The target code type of the compilation (if any).
530 -- Whenever you change the target, also make sure to set 'ghcLink' to
531 -- something sensible.
533 -- 'HscNothing' can be used to avoid generating any output, however, note
536 -- * This will not run the desugaring step, thus no warnings generated in
537 -- this step will be output. In particular, this includes warnings related
538 -- to pattern matching. You can run the desugarer manually using
539 -- 'GHC.desugarModule'.
541 -- * If a program uses Template Haskell the typechecker may try to run code
542 -- from an imported module. This will fail if no code has been generated
543 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
544 -- whether this might be the case and choose to either switch to a
545 -- different target or avoid typechecking such modules. (The latter may
546 -- preferable for security reasons.)
549 = HscC -- ^ Generate C code.
550 | HscAsm -- ^ Generate assembly using the native code generator.
551 | HscLlvm -- ^ Generate assembly using the llvm code generator.
552 | HscJava -- ^ Generate Java bytecode.
553 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
554 | HscNothing -- ^ Don't generate any code. See notes above.
557 -- | Will this target result in an object file on the disk?
558 isObjectTarget :: HscTarget -> Bool
559 isObjectTarget HscC = True
560 isObjectTarget HscAsm = True
561 isObjectTarget HscLlvm = True
562 isObjectTarget _ = False
564 -- | The 'GhcMode' tells us whether we're doing multi-module
565 -- compilation (controlled via the "GHC" API) or one-shot
566 -- (single-module) compilation. This makes a difference primarily to
567 -- the "Finder": in one-shot mode we look for interface files for
568 -- imported modules, but in multi-module mode we look for source files
569 -- in order to check whether they need to be recompiled.
571 = CompManager -- ^ @\-\-make@, GHCi, etc.
572 | OneShot -- ^ @ghc -c Foo.hs@
573 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
576 instance Outputable GhcMode where
577 ppr CompManager = ptext (sLit "CompManager")
578 ppr OneShot = ptext (sLit "OneShot")
579 ppr MkDepend = ptext (sLit "MkDepend")
581 isOneShot :: GhcMode -> Bool
582 isOneShot OneShot = True
583 isOneShot _other = False
585 -- | What to do in the link step, if there is one.
587 = NoLink -- ^ Don't link at all
588 | LinkBinary -- ^ Link object code into a binary
589 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
590 -- bytecode and object code).
591 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
594 isNoLink :: GhcLink -> Bool
595 isNoLink NoLink = True
598 -- Is it worth evaluating this Bool and caching it in the DynFlags value
599 -- during initDynFlags?
600 doingTickyProfiling :: DynFlags -> Bool
601 doingTickyProfiling _ = opt_Ticky
602 -- XXX -ticky is a static flag, because it implies -debug which is also
603 -- static. If the way flags were made dynamic, we could fix this.
606 = ExposePackage String
607 | ExposePackageId String
609 | IgnorePackage String
612 defaultHscTarget :: HscTarget
613 defaultHscTarget = defaultObjectTarget
615 -- | The 'HscTarget' value corresponding to the default way to create
616 -- object files on the current platform.
617 defaultObjectTarget :: HscTarget
619 | cGhcWithNativeCodeGen == "YES" = HscAsm
627 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
629 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
630 initDynFlags :: DynFlags -> IO DynFlags
631 initDynFlags dflags = do
632 -- someday these will be dynamic flags
633 ways <- readIORef v_Ways
634 refFilesToClean <- newIORef []
635 refDirsToClean <- newIORef Map.empty
638 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
639 rtsBuildTag = mkBuildTag ways,
640 filesToClean = refFilesToClean,
641 dirsToClean = refDirsToClean
644 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
645 -- and must be fully initialized by 'GHC.newSession' first.
646 defaultDynFlags :: DynFlags
649 ghcMode = CompManager,
650 ghcLink = LinkBinary,
651 hscTarget = defaultHscTarget,
657 maxSimplIterations = 4,
658 shouldDumpSimplPhase = Nothing,
660 specConstrThreshold = Just 200,
661 specConstrCount = Just 3,
662 liberateCaseThreshold = Just 200,
663 floatLamArgs = Just 0, -- Default: float only if no fvs
664 strictnessBefore = [],
666 #ifndef OMIT_NATIVE_CODEGEN
667 targetPlatform = defaultTargetPlatform,
670 cmdlineHcIncludes = [],
674 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
676 dphBackend = DPHNone,
678 thisPackage = mainPackageId,
681 dylibInstallName = Nothing,
685 objectSuf = phaseInputExt StopLn,
686 hcSuf = phaseInputExt HCc,
689 outputFile = Nothing,
691 dynLibLoader = SystemDependent,
692 dumpPrefix = Nothing,
693 dumpPrefixForce = Nothing,
697 cmdlineFrameworks = [],
698 tmpDir = cDEFAULT_TMPDIR,
700 rtsOptsEnabled = RtsOptsSafeOnly,
706 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
719 pkgDatabase = Nothing,
720 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
721 ways = panic "defaultDynFlags: No ways",
722 buildTag = panic "defaultDynFlags: No buildTag",
723 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
725 -- initSysTools fills all these in
726 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
727 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
728 topDir = panic "defaultDynFlags: No topDir",
729 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
730 pgm_L = panic "defaultDynFlags: No pgm_L",
731 pgm_P = panic "defaultDynFlags: No pgm_P",
732 pgm_F = panic "defaultDynFlags: No pgm_F",
733 pgm_c = panic "defaultDynFlags: No pgm_c",
734 pgm_m = panic "defaultDynFlags: No pgm_m",
735 pgm_s = panic "defaultDynFlags: No pgm_s",
736 pgm_a = panic "defaultDynFlags: No pgm_a",
737 pgm_l = panic "defaultDynFlags: No pgm_l",
738 pgm_dll = panic "defaultDynFlags: No pgm_dll",
739 pgm_T = panic "defaultDynFlags: No pgm_T",
740 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
741 pgm_windres = panic "defaultDynFlags: No pgm_windres",
742 pgm_lo = panic "defaultDynFlags: No pgm_lo",
743 pgm_lc = panic "defaultDynFlags: No pgm_lc",
744 -- end of initSysTools values
746 depMakefile = "Makefile",
747 depIncludePkgDeps = False,
750 -- end of ghc -M values
751 filesToClean = panic "defaultDynFlags: No filesToClean",
752 dirsToClean = panic "defaultDynFlags: No dirsToClean",
753 haddockOptions = Nothing,
754 flags = defaultFlags,
757 extensionFlags = flattenExtensionFlags Nothing [],
759 log_action = \severity srcSpan style msg ->
761 SevOutput -> printOutput (msg style)
762 SevInfo -> printErrs (msg style)
763 SevFatal -> printErrs (msg style)
766 printErrs ((mkLocMessage srcSpan msg) style)
767 -- careful (#2302): printErrs prints in UTF-8, whereas
768 -- converting to string first and using hPutStr would
769 -- just emit the low 8 bits of each unicode char.
773 Note [Verbosity levels]
774 ~~~~~~~~~~~~~~~~~~~~~~~
775 0 | print errors & warnings only
776 1 | minimal verbosity: print "compiling M ... done." for each module.
777 2 | equivalent to -dshow-passes
778 3 | equivalent to existing "ghc -v"
779 4 | "ghc -v -ddump-most"
780 5 | "ghc -v -ddump-all"
786 -- OnOffs accumulate in reverse order, so we use foldr in order to
787 -- process them in the right order
788 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
790 flattenExtensionFlags ml = foldr f defaultExtensionFlags
791 where f (On f) flags = f : delete f flags
792 f (Off f) flags = delete f flags
793 defaultExtensionFlags = languageExtensions ml
795 languageExtensions :: Maybe Language -> [ExtensionFlag]
797 languageExtensions Nothing
798 -- Nothing => the default case
799 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
800 -- behaviour the default, to see if anyone notices
802 -- In due course I'd like Opt_MonoLocalBinds to be on by default
803 -- But NB it's implied by GADTs etc
804 -- SLPJ September 2010
805 : Opt_NondecreasingIndentation -- This has been on by default for some time
806 : languageExtensions (Just Haskell2010)
808 languageExtensions (Just Haskell98)
809 = [Opt_ImplicitPrelude,
810 Opt_MonomorphismRestriction,
812 Opt_DatatypeContexts,
813 Opt_NondecreasingIndentation
814 -- strictly speaking non-standard, but we always had this
815 -- on implicitly before the option was added in 7.1, and
816 -- turning it off breaks code, so we're keeping it on for
817 -- backwards compatibility. Cabal uses -XHaskell98 by
818 -- default unless you specify another language.
821 languageExtensions (Just Haskell2010)
822 = [Opt_ImplicitPrelude,
823 Opt_MonomorphismRestriction,
824 Opt_DatatypeContexts,
826 Opt_ForeignFunctionInterface,
831 -- | Test whether a 'DynFlag' is set
832 dopt :: DynFlag -> DynFlags -> Bool
833 dopt f dflags = f `elem` (flags dflags)
836 dopt_set :: DynFlags -> DynFlag -> DynFlags
837 dopt_set dfs f = dfs{ flags = f : flags dfs }
839 -- | Unset a 'DynFlag'
840 dopt_unset :: DynFlags -> DynFlag -> DynFlags
841 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
843 -- | Test whether a 'ExtensionFlag' is set
844 xopt :: ExtensionFlag -> DynFlags -> Bool
845 xopt f dflags = f `elem` extensionFlags dflags
847 -- | Set a 'ExtensionFlag'
848 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
850 = let onoffs = On f : extensions dfs
851 in dfs { extensions = onoffs,
852 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
854 -- | Unset a 'ExtensionFlag'
855 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
857 = let onoffs = Off f : extensions dfs
858 in dfs { extensions = onoffs,
859 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
861 setLanguage :: Language -> DynP ()
862 setLanguage l = upd f
863 where f dfs = let mLang = Just l
864 oneoffs = extensions dfs
867 extensionFlags = flattenExtensionFlags mLang oneoffs
870 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
871 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
872 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
873 -> [a] -- ^ Correctly ordered extracted options
874 getOpts dflags opts = reverse (opts dflags)
875 -- We add to the options from the front, so we need to reverse the list
877 -- | Gets the verbosity flag for the current verbosity level. This is fed to
878 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
879 getVerbFlag :: DynFlags -> String
881 | verbosity dflags >= 3 = "-v"
884 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
885 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
886 setPgmP, addOptl, addOptP,
887 addCmdlineFramework, addHaddockOpts
888 :: String -> DynFlags -> DynFlags
889 setOutputFile, setOutputHi, setDumpPrefixForce
890 :: Maybe String -> DynFlags -> DynFlags
892 setObjectDir f d = d{ objectDir = Just f}
893 setHiDir f d = d{ hiDir = Just f}
894 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
895 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
896 -- \#included from the .hc file when compiling with -fvia-C.
897 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
898 setDylibInstallName f d = d{ dylibInstallName = Just f}
900 setObjectSuf f d = d{ objectSuf = f}
901 setHiSuf f d = d{ hiSuf = f}
902 setHcSuf f d = d{ hcSuf = f}
904 setOutputFile f d = d{ outputFile = f}
905 setOutputHi f d = d{ outputHi = f}
907 parseDynLibLoaderMode f d =
909 ("deploy", "") -> d{ dynLibLoader = Deployable }
910 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
911 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
913 setDumpPrefixForce f d = d { dumpPrefixForce = f}
915 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
916 -- Config.hs should really use Option.
917 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
918 addOptl f d = d{ opt_l = f : opt_l d}
919 addOptP f d = d{ opt_P = f : opt_P d}
922 setDepMakefile :: FilePath -> DynFlags -> DynFlags
923 setDepMakefile f d = d { depMakefile = deOptDep f }
925 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
926 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
928 addDepExcludeMod :: String -> DynFlags -> DynFlags
930 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
932 addDepSuffix :: FilePath -> DynFlags -> DynFlags
933 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
936 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
937 -- we need to strip the "-optdep" off of the arg
938 deOptDep :: String -> String
939 deOptDep x = case stripPrefix "-optdep" x of
943 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
945 addHaddockOpts f d = d{ haddockOptions = Just f}
947 -- -----------------------------------------------------------------------------
948 -- Command-line options
950 -- | When invoking external tools as part of the compilation pipeline, we
951 -- pass these a sequence of options on the command-line. Rather than
952 -- just using a list of Strings, we use a type that allows us to distinguish
953 -- between filepaths and 'other stuff'. The reason for this is that
954 -- this type gives us a handle on transforming filenames, and filenames only,
955 -- to whatever format they're expected to be on a particular platform.
957 = FileOption -- an entry that _contains_ filename(s) / filepaths.
958 String -- a non-filepath prefix that shouldn't be
959 -- transformed (e.g., "/out=")
960 String -- the filepath/filename portion
963 showOpt :: Option -> String
964 showOpt (FileOption pre f) = pre ++ f
965 showOpt (Option s) = s
967 -----------------------------------------------------------------------------
968 -- Setting the optimisation level
970 updOptLevel :: Int -> DynFlags -> DynFlags
971 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
973 = dfs2{ optLevel = final_n }
975 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
976 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
977 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
979 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
980 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
982 -- -----------------------------------------------------------------------------
983 -- StgToDo: abstraction of stg-to-stg passes to run.
986 = StgDoMassageForProfiling -- should be (next to) last
987 -- There's also setStgVarInfo, but its absolute "lastness"
988 -- is so critical that it is hardwired in (no flag).
991 getStgToDo :: DynFlags -> [StgToDo]
995 stg_stats = dopt Opt_StgStats dflags
997 todo1 = if stg_stats then [D_stg_stats] else []
999 todo2 | WayProf `elem` wayNames dflags
1000 = StgDoMassageForProfiling : todo1
1004 {- **********************************************************************
1008 %********************************************************************* -}
1010 -- -----------------------------------------------------------------------------
1011 -- Parsing the dynamic flags.
1013 -- | Parse dynamic flags from a list of command line arguments. Returns the
1014 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1015 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1016 -- flags or missing arguments).
1017 parseDynamicFlags :: Monad m =>
1018 DynFlags -> [Located String]
1019 -> m (DynFlags, [Located String], [Located String])
1020 -- ^ Updated 'DynFlags', left-over arguments, and
1021 -- list of warnings.
1022 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1024 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1025 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1026 parseDynamicNoPackageFlags :: Monad m =>
1027 DynFlags -> [Located String]
1028 -> m (DynFlags, [Located String], [Located String])
1029 -- ^ Updated 'DynFlags', left-over arguments, and
1030 -- list of warnings.
1031 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1033 parseDynamicFlags_ :: Monad m =>
1034 DynFlags -> [Located String] -> Bool
1035 -> m (DynFlags, [Located String], [Located String])
1036 parseDynamicFlags_ dflags0 args pkg_flags = do
1037 -- XXX Legacy support code
1038 -- We used to accept things like
1039 -- optdep-f -optdepdepend
1040 -- optdep-f -optdep depend
1041 -- optdep -f -optdepdepend
1042 -- optdep -f -optdep depend
1043 -- but the spaces trip up proper argument handling. So get rid of them.
1044 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1045 f (x : xs) = x : f xs
1049 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1050 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1051 | otherwise = dynamic_flags
1053 let ((leftover, errs, warns), dflags1)
1054 = runCmdLine (processArgs flag_spec args') dflags0
1055 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1057 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1058 -- isn't up to the job. We know that if hscTarget == HscC, then the
1059 -- user has explicitly used -fvia-C, because -fasm is the default,
1060 -- unless there is no NCG on this platform. The latter case is
1061 -- checked when the -fPIC flag is parsed.
1063 let (pic_warns, dflags2)
1064 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1065 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1066 dflags1{ hscTarget = HscAsm })
1067 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1068 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1069 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1070 ++ "dynamic on this platform;\n ignoring -fllvm"],
1071 dflags1{ hscTarget = HscAsm })
1073 | otherwise = ([], dflags1)
1075 return (dflags2, leftover, pic_warns ++ warns)
1078 {- **********************************************************************
1080 DynFlags specifications
1082 %********************************************************************* -}
1084 allFlags :: [String]
1085 allFlags = map ('-':) $
1086 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1087 map ("fno-"++) flags ++
1088 map ("f"++) flags ++
1089 map ("f"++) flags' ++
1090 map ("X"++) supportedExtensions
1091 where ok (PrefixPred _ _) = False
1093 flags = [ name | (name, _, _) <- fFlags ]
1094 flags' = [ name | (name, _, _) <- fLangFlags ]
1096 --------------- The main flags themselves ------------------
1097 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1099 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1100 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1101 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1103 (HasArg (\s -> do { addCmdlineHCInclude s
1104 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1105 , Flag "v" (OptIntSuffix setVerbosity)
1107 ------- Specific phases --------------------------------------------
1108 -- need to appear before -pgmL to be parsed as LLVM flags.
1109 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1110 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1111 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1112 , Flag "pgmP" (hasArg setPgmP)
1113 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1114 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1115 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1116 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1117 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1118 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1119 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1120 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1122 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1123 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1124 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1125 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1126 , Flag "optP" (hasArg addOptP)
1127 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1128 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1129 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1130 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1131 , Flag "optl" (hasArg addOptl)
1132 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1135 (NoArg (if can_split
1136 then setDynFlag Opt_SplitObjs
1137 else addWarn "ignoring -fsplit-objs"))
1139 -------- ghc -M -----------------------------------------------------
1140 , Flag "dep-suffix" (hasArg addDepSuffix)
1141 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1142 , Flag "dep-makefile" (hasArg setDepMakefile)
1143 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1144 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1145 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1146 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1147 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1148 , Flag "exclude-module" (hasArg addDepExcludeMod)
1149 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1150 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1152 -------- Linking ----------------------------------------------------
1153 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1154 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1155 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1156 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1158 ------- Libraries ---------------------------------------------------
1159 , Flag "L" (Prefix addLibraryPath)
1160 , Flag "l" (AnySuffix (upd . addOptl))
1162 ------- Frameworks --------------------------------------------------
1163 -- -framework-path should really be -F ...
1164 , Flag "framework-path" (HasArg addFrameworkPath)
1165 , Flag "framework" (hasArg addCmdlineFramework)
1167 ------- Output Redirection ------------------------------------------
1168 , Flag "odir" (hasArg setObjectDir)
1169 , Flag "o" (SepArg (upd . setOutputFile . Just))
1170 , Flag "ohi" (hasArg (setOutputHi . Just ))
1171 , Flag "osuf" (hasArg setObjectSuf)
1172 , Flag "hcsuf" (hasArg setHcSuf)
1173 , Flag "hisuf" (hasArg setHiSuf)
1174 , Flag "hidir" (hasArg setHiDir)
1175 , Flag "tmpdir" (hasArg setTmpDir)
1176 , Flag "stubdir" (hasArg setStubDir)
1177 , Flag "outputdir" (hasArg setOutputDir)
1178 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1180 ------- Keeping temporary files -------------------------------------
1181 -- These can be singular (think ghc -c) or plural (think ghc --make)
1182 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1183 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1184 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1185 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1186 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1187 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1188 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1189 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1190 -- This only makes sense as plural
1191 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1193 ------- Miscellaneous ----------------------------------------------
1194 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1195 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1196 , Flag "with-rtsopts" (HasArg setRtsOpts)
1197 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1198 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1199 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1200 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1201 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1202 , Flag "main-is" (SepArg setMainIs)
1203 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1204 , Flag "haddock-opts" (hasArg addHaddockOpts)
1205 , Flag "hpcdir" (SepArg setOptHpcDir)
1207 ------- recompilation checker --------------------------------------
1208 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1209 ; deprecate "Use -fno-force-recomp instead" }))
1210 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1211 ; deprecate "Use -fforce-recomp instead" }))
1213 ------ HsCpp opts ---------------------------------------------------
1214 , Flag "D" (AnySuffix (upd . addOptP))
1215 , Flag "U" (AnySuffix (upd . addOptP))
1217 ------- Include/Import Paths ----------------------------------------
1218 , Flag "I" (Prefix addIncludePath)
1219 , Flag "i" (OptPrefix addImportPath)
1221 ------ Debugging ----------------------------------------------------
1222 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1224 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1225 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1226 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1227 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1228 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1229 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1230 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1231 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1232 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1233 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1234 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1235 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1236 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1237 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1238 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1239 ; setDumpFlag' Opt_D_dump_llvm}))
1240 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1241 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1242 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1243 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1244 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1245 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1246 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1247 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1248 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1249 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1250 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1251 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1252 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1253 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1254 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1255 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1256 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1257 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1258 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1259 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1260 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1261 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1262 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1263 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1264 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1265 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1266 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1267 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1268 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1269 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1270 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1271 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1272 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1273 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1274 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1275 ; setVerboseCore2Core }))
1276 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1277 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1278 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1279 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1280 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1281 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1282 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1283 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1284 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1285 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1286 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1287 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1288 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1289 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1290 , Flag "dshow-passes" (NoArg (do forceRecompile
1291 setVerbosity (Just 2)))
1292 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1294 ------ Machine dependant (-m<blah>) stuff ---------------------------
1296 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1297 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1298 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1299 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1301 ------ Warning opts -------------------------------------------------
1302 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1303 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1304 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1305 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1306 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1307 ; deprecate "Use -w instead" }))
1308 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1310 ------ Optimisation flags ------------------------------------------
1311 , Flag "O" (noArg (setOptLevel 1))
1312 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1313 , Flag "Odph" (noArg setDPHOpt)
1314 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1315 -- If the number is missing, use 1
1317 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1318 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1319 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1320 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1321 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1322 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1323 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1324 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1325 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1326 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1327 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1328 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1329 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1331 ------ Profiling ----------------------------------------------------
1333 -- XXX Should the -f* flags be deprecated?
1334 -- They don't seem to be documented
1335 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1336 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1337 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1338 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1339 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1340 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1341 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1342 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1343 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1345 ------ DPH flags ----------------------------------------------------
1347 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1348 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1349 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1350 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1352 ------ Compiler flags -----------------------------------------------
1354 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1355 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1356 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1357 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1358 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1359 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1361 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1362 setTarget HscNothing))
1363 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1364 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1365 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1366 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1368 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1369 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1370 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1371 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1372 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1373 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1374 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1376 package_flags :: [Flag (CmdLineP DynFlags)]
1378 ------- Packages ----------------------------------------------------
1379 Flag "package-conf" (HasArg extraPkgConf_)
1380 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1381 , Flag "package-name" (hasArg setPackageName)
1382 , Flag "package-id" (HasArg exposePackageId)
1383 , Flag "package" (HasArg exposePackage)
1384 , Flag "hide-package" (HasArg hidePackage)
1385 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1386 , Flag "ignore-package" (HasArg ignorePackage)
1387 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1388 ; deprecate "Use -package instead" }))
1391 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1392 -- False <=> we are turning the flag off
1393 turnOn :: TurnOnFlag; turnOn = True
1394 turnOff :: TurnOnFlag; turnOff = False
1397 = ( String -- Flag in string form
1398 , flag -- Flag in internal form
1399 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1400 -- Typically, emit a warning or error
1402 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1403 -> String -- ^ The flag prefix
1404 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1405 -> FlagSpec flag -- ^ Specification of this particular flag
1406 -> Flag (CmdLineP DynFlags)
1407 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1408 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1410 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1411 deprecatedForExtension lang turn_on
1412 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1414 flag | turn_on = lang
1415 | otherwise = "No"++lang
1417 useInstead :: String -> TurnOnFlag -> DynP ()
1418 useInstead flag turn_on
1419 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1421 no = if turn_on then "" else "no-"
1423 nop :: TurnOnFlag -> DynP ()
1426 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1427 fFlags :: [FlagSpec DynFlag]
1429 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1430 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1431 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1432 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1433 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1434 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1435 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1436 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1437 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1438 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1439 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1440 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1441 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1442 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1443 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1444 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1445 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1446 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1447 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1448 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1449 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1450 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1451 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1452 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1453 ( "warn-orphans", Opt_WarnOrphans, nop ),
1454 ( "warn-identities", Opt_WarnIdentities, nop ),
1455 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1456 ( "warn-tabs", Opt_WarnTabs, nop ),
1457 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1458 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1459 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1460 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1461 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1462 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1463 ( "strictness", Opt_Strictness, nop ),
1464 ( "specialise", Opt_Specialise, nop ),
1465 ( "float-in", Opt_FloatIn, nop ),
1466 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1467 ( "full-laziness", Opt_FullLaziness, nop ),
1468 ( "liberate-case", Opt_LiberateCase, nop ),
1469 ( "spec-constr", Opt_SpecConstr, nop ),
1470 ( "cse", Opt_CSE, nop ),
1471 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1472 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1473 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1474 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1475 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1476 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1477 ( "case-merge", Opt_CaseMerge, nop ),
1478 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1479 ( "method-sharing", Opt_MethodSharing,
1480 \_ -> deprecate "doesn't do anything any more"),
1481 -- Remove altogether in GHC 7.2
1482 ( "dicts-cheap", Opt_DictsCheap, nop ),
1483 ( "excess-precision", Opt_ExcessPrecision, nop ),
1484 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1485 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1486 ( "print-bind-result", Opt_PrintBindResult, nop ),
1487 ( "force-recomp", Opt_ForceRecomp, nop ),
1488 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1489 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1490 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1491 ( "break-on-exception", Opt_BreakOnException, nop ),
1492 ( "break-on-error", Opt_BreakOnError, nop ),
1493 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1494 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1495 ( "run-cps", Opt_RunCPS, nop ),
1496 ( "run-cpsz", Opt_RunCPSZ, nop ),
1497 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1498 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1499 ( "vectorise", Opt_Vectorise, nop ),
1500 ( "regs-graph", Opt_RegsGraph, nop ),
1501 ( "regs-iterative", Opt_RegsIterative, nop ),
1502 ( "gen-manifest", Opt_GenManifest, nop ),
1503 ( "embed-manifest", Opt_EmbedManifest, nop ),
1504 ( "ext-core", Opt_EmitExternalCore, nop ),
1505 ( "shared-implib", Opt_SharedImplib, nop ),
1506 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1507 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1508 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1509 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1512 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1513 fLangFlags :: [FlagSpec ExtensionFlag]
1515 ( "th", Opt_TemplateHaskell,
1516 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1517 ( "fi", Opt_ForeignFunctionInterface,
1518 deprecatedForExtension "ForeignFunctionInterface" ),
1519 ( "ffi", Opt_ForeignFunctionInterface,
1520 deprecatedForExtension "ForeignFunctionInterface" ),
1521 ( "arrows", Opt_Arrows,
1522 deprecatedForExtension "Arrows" ),
1523 ( "generics", Opt_Generics,
1524 deprecatedForExtension "Generics" ),
1525 ( "implicit-prelude", Opt_ImplicitPrelude,
1526 deprecatedForExtension "ImplicitPrelude" ),
1527 ( "bang-patterns", Opt_BangPatterns,
1528 deprecatedForExtension "BangPatterns" ),
1529 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1530 deprecatedForExtension "MonomorphismRestriction" ),
1531 ( "mono-pat-binds", Opt_MonoPatBinds,
1532 deprecatedForExtension "MonoPatBinds" ),
1533 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1534 deprecatedForExtension "ExtendedDefaultRules" ),
1535 ( "implicit-params", Opt_ImplicitParams,
1536 deprecatedForExtension "ImplicitParams" ),
1537 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1538 deprecatedForExtension "ScopedTypeVariables" ),
1539 ( "parr", Opt_ParallelArrays,
1540 deprecatedForExtension "ParallelArrays" ),
1541 ( "PArr", Opt_ParallelArrays,
1542 deprecatedForExtension "ParallelArrays" ),
1543 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1544 deprecatedForExtension "OverlappingInstances" ),
1545 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1546 deprecatedForExtension "UndecidableInstances" ),
1547 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1548 deprecatedForExtension "IncoherentInstances" )
1551 supportedLanguages :: [String]
1552 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1554 supportedExtensions :: [String]
1555 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1557 supportedLanguagesAndExtensions :: [String]
1558 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1560 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1561 languageFlags :: [FlagSpec Language]
1563 ( "Haskell98", Haskell98, nop ),
1564 ( "Haskell2010", Haskell2010, nop )
1567 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1568 xFlags :: [FlagSpec ExtensionFlag]
1570 ( "CPP", Opt_Cpp, nop ),
1571 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1572 ( "TupleSections", Opt_TupleSections, nop ),
1573 ( "PatternGuards", Opt_PatternGuards, nop ),
1574 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1575 ( "MagicHash", Opt_MagicHash, nop ),
1576 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1577 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1578 ( "KindSignatures", Opt_KindSignatures, nop ),
1579 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1580 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1581 ( "TransformListComp", Opt_TransformListComp, nop ),
1582 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1583 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1584 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1585 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1586 ( "Rank2Types", Opt_Rank2Types, nop ),
1587 ( "RankNTypes", Opt_RankNTypes, nop ),
1588 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1589 ( "TypeOperators", Opt_TypeOperators, nop ),
1590 ( "RecursiveDo", Opt_RecursiveDo,
1591 deprecatedForExtension "DoRec"),
1592 ( "DoRec", Opt_DoRec, nop ),
1593 ( "Arrows", Opt_Arrows, nop ),
1594 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1595 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1596 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1597 ( "Generics", Opt_Generics, nop ),
1598 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1599 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1600 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1601 ( "RecordPuns", Opt_RecordPuns,
1602 deprecatedForExtension "NamedFieldPuns" ),
1603 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1604 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1605 ( "GADTs", Opt_GADTs, nop ),
1606 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1607 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1608 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1609 ( "BangPatterns", Opt_BangPatterns, nop ),
1610 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1611 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1612 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1613 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1614 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1615 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1616 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1617 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1618 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1619 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1620 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1621 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1622 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1623 \ turn_on -> if not turn_on
1624 then deprecate "You can't turn off RelaxedPolyRec any more"
1626 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1627 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1628 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1630 ( "PatternSignatures", Opt_ScopedTypeVariables,
1631 deprecatedForExtension "ScopedTypeVariables" ),
1633 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1634 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1635 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1636 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1637 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1638 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1639 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1640 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1641 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1642 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1643 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1644 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1645 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1646 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1647 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1648 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1649 ( "PackageImports", Opt_PackageImports, nop )
1652 defaultFlags :: [DynFlag]
1654 = [ Opt_AutoLinkPackages,
1655 Opt_ReadUserPackageConf,
1663 Opt_PrintBindContents,
1668 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1669 -- The default -O0 options
1673 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1675 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1676 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1677 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1678 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1679 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1680 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1681 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1683 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1685 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1686 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1687 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1689 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1690 -- all over the place
1692 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1694 -- Record wild-cards implies field disambiguation
1695 -- Otherwise if you write (C {..}) you may well get
1696 -- stuff like " 'a' not in scope ", which is a bit silly
1697 -- if the compiler has just filled in field 'a' of constructor 'C'
1698 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1700 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1703 optLevelFlags :: [([Int], DynFlag)]
1705 = [ ([0], Opt_IgnoreInterfacePragmas)
1706 , ([0], Opt_OmitInterfacePragmas)
1708 , ([1,2], Opt_IgnoreAsserts)
1709 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1711 , ([1,2], Opt_DoEtaReduction)
1712 , ([1,2], Opt_CaseMerge)
1713 , ([1,2], Opt_Strictness)
1715 , ([1,2], Opt_FullLaziness)
1716 , ([1,2], Opt_Specialise)
1717 , ([1,2], Opt_FloatIn)
1719 , ([2], Opt_LiberateCase)
1720 , ([2], Opt_SpecConstr)
1721 , ([2], Opt_RegsGraph)
1723 -- , ([2], Opt_StaticArgumentTransformation)
1724 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1725 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1726 -- several improvements to the heuristics, and I'm concerned that without
1727 -- those changes SAT will interfere with some attempts to write "high
1728 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1729 -- this year. In particular, the version in HEAD lacks the tail call
1730 -- criterion, so many things that look like reasonable loops will be
1731 -- turned into functions with extra (unneccesary) thunk creation.
1733 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1734 -- This one is important for a tiresome reason:
1735 -- we want to make sure that the bindings for data
1736 -- constructors are eta-expanded. This is probably
1737 -- a good thing anyway, but it seems fragile.
1740 -- -----------------------------------------------------------------------------
1741 -- Standard sets of warning options
1743 standardWarnings :: [DynFlag]
1745 = [ Opt_WarnWarningsDeprecations,
1746 Opt_WarnDeprecatedFlags,
1747 Opt_WarnUnrecognisedPragmas,
1748 Opt_WarnOverlappingPatterns,
1749 Opt_WarnMissingFields,
1750 Opt_WarnMissingMethods,
1751 Opt_WarnDuplicateExports,
1752 Opt_WarnLazyUnliftedBindings,
1753 Opt_WarnDodgyForeignImports,
1754 Opt_WarnWrongDoBind,
1755 Opt_WarnAlternativeLayoutRuleTransitional
1758 minusWOpts :: [DynFlag]
1759 -- Things you get with -W
1761 = standardWarnings ++
1762 [ Opt_WarnUnusedBinds,
1763 Opt_WarnUnusedMatches,
1764 Opt_WarnUnusedImports,
1765 Opt_WarnIncompletePatterns,
1766 Opt_WarnDodgyExports,
1767 Opt_WarnDodgyImports
1770 minusWallOpts :: [DynFlag]
1771 -- Things you get with -Wall
1774 [ Opt_WarnTypeDefaults,
1775 Opt_WarnNameShadowing,
1776 Opt_WarnMissingSigs,
1779 Opt_WarnUnusedDoBind
1782 minuswRemovesOpts :: [DynFlag]
1783 -- minuswRemovesOpts should be every warning option
1787 Opt_WarnIncompletePatternsRecUpd,
1788 Opt_WarnIncompleteUniPatterns,
1789 Opt_WarnMonomorphism,
1790 Opt_WarnUnrecognisedPragmas,
1791 Opt_WarnAutoOrphans,
1792 Opt_WarnImplicitPrelude
1795 enableGlasgowExts :: DynP ()
1796 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1797 mapM_ setExtensionFlag glasgowExtsFlags
1799 disableGlasgowExts :: DynP ()
1800 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1801 mapM_ unSetExtensionFlag glasgowExtsFlags
1803 glasgowExtsFlags :: [ExtensionFlag]
1804 glasgowExtsFlags = [
1805 Opt_ForeignFunctionInterface
1806 , Opt_UnliftedFFITypes
1807 , Opt_ImplicitParams
1808 , Opt_ScopedTypeVariables
1810 , Opt_TypeSynonymInstances
1811 , Opt_StandaloneDeriving
1812 , Opt_DeriveDataTypeable
1814 , Opt_DeriveFoldable
1815 , Opt_DeriveTraversable
1816 , Opt_FlexibleContexts
1817 , Opt_FlexibleInstances
1818 , Opt_ConstrainedClassMethods
1819 , Opt_MultiParamTypeClasses
1820 , Opt_FunctionalDependencies
1822 , Opt_PolymorphicComponents
1823 , Opt_ExistentialQuantification
1825 , Opt_PostfixOperators
1827 , Opt_LiberalTypeSynonyms
1831 , Opt_ParallelListComp
1832 , Opt_EmptyDataDecls
1833 , Opt_KindSignatures
1834 , Opt_GeneralizedNewtypeDeriving ]
1837 -- Consult the RTS to find whether GHC itself has been built profiled
1838 -- If so, you can't use Template Haskell
1839 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1841 rtsIsProfiled :: Bool
1842 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1844 checkTemplateHaskellOk :: Bool -> DynP ()
1845 checkTemplateHaskellOk turn_on
1846 | turn_on && rtsIsProfiled
1847 = addErr "You can't use Template Haskell with a profiled compiler"
1851 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1852 -- so we simply say "ok". It doesn't matter because TH isn't
1853 -- available in stage 1 anyway.
1854 checkTemplateHaskellOk turn_on = return ()
1857 {- **********************************************************************
1859 DynFlags constructors
1861 %********************************************************************* -}
1863 type DynP = EwM (CmdLineP DynFlags)
1865 upd :: (DynFlags -> DynFlags) -> DynP ()
1866 upd f = liftEwM (do { dfs <- getCmdLineState
1867 ; putCmdLineState $! (f dfs) })
1869 --------------- Constructor functions for OptKind -----------------
1870 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1871 noArg fn = NoArg (upd fn)
1873 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1874 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1876 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1877 hasArg fn = HasArg (upd . fn)
1879 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1880 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1881 ; deprecate deprec })
1883 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1884 intSuffix fn = IntSuffix (\n -> upd (fn n))
1886 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1887 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1889 --------------------------
1890 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1891 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1892 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1894 --------------------------
1895 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1896 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1899 deps = [ if turn_on then setExtensionFlag d
1900 else unSetExtensionFlag d
1901 | (f', turn_on, d) <- impliedFlags, f' == f ]
1902 -- When you set f, set the ones it implies
1903 -- NB: use setExtensionFlag recursively, in case the implied flags
1904 -- implies further flags
1906 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1907 -- When you un-set f, however, we don't un-set the things it implies
1908 -- (except for -fno-glasgow-exts, which is treated specially)
1910 --------------------------
1911 setDumpFlag' :: DynFlag -> DynP ()
1912 setDumpFlag' dump_flag
1913 = do { setDynFlag dump_flag
1914 ; when want_recomp forceRecompile }
1916 -- Certain dumpy-things are really interested in what's going
1917 -- on during recompilation checking, so in those cases we
1918 -- don't want to turn it off.
1919 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1920 Opt_D_dump_hi_diffs]
1922 forceRecompile :: DynP ()
1923 -- Whenver we -ddump, force recompilation (by switching off the
1924 -- recompilation checker), else you don't see the dump! However,
1925 -- don't switch it off in --make mode, else *everything* gets
1926 -- recompiled which probably isn't what you want
1927 forceRecompile = do { dfs <- liftEwM getCmdLineState
1928 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1930 force_recomp dfs = isOneShot (ghcMode dfs)
1932 setVerboseCore2Core :: DynP ()
1933 setVerboseCore2Core = do forceRecompile
1934 setDynFlag Opt_D_verbose_core2core
1935 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1938 setDumpSimplPhases :: String -> DynP ()
1939 setDumpSimplPhases s = do forceRecompile
1940 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1942 spec = case s of { ('=' : s') -> s'; _ -> s }
1944 setVerbosity :: Maybe Int -> DynP ()
1945 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1947 addCmdlineHCInclude :: String -> DynP ()
1948 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1950 extraPkgConf_ :: FilePath -> DynP ()
1951 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1953 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1955 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1957 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1959 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1961 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1963 setPackageName :: String -> DynFlags -> DynFlags
1964 setPackageName p s = s{ thisPackage = stringToPackageId p }
1966 -- If we're linking a binary, then only targets that produce object
1967 -- code are allowed (requests for other target types are ignored).
1968 setTarget :: HscTarget -> DynP ()
1969 setTarget l = upd set
1972 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1975 -- Changes the target only if we're compiling object code. This is
1976 -- used by -fasm and -fvia-C, which switch from one to the other, but
1977 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1978 -- can be safely used in an OPTIONS_GHC pragma.
1979 setObjTarget :: HscTarget -> DynP ()
1980 setObjTarget l = upd set
1983 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1986 setOptLevel :: Int -> DynFlags -> DynFlags
1987 setOptLevel n dflags
1988 | hscTarget dflags == HscInterpreted && n > 0
1990 -- not in IO any more, oh well:
1991 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1993 = updOptLevel n dflags
1996 -- -Odph is equivalent to
1998 -- -O2 optimise as much as possible
1999 -- -fmax-simplifier-iterations20 this is necessary sometimes
2000 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2002 setDPHOpt :: DynFlags -> DynFlags
2003 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2007 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2008 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2009 -- vectoriser cannot be used.
2011 data DPHBackend = DPHPar -- "dph-par"
2012 | DPHSeq -- "dph-seq"
2013 | DPHThis -- the currently compiled package
2014 | DPHNone -- no DPH library available
2015 deriving(Eq, Ord, Enum, Show)
2017 setDPHBackend :: DPHBackend -> DynP ()
2018 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2020 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2022 dphPackageMaybe :: DynFlags -> Maybe PackageId
2023 dphPackageMaybe dflags
2024 = case dphBackend dflags of
2025 DPHPar -> Just dphParPackageId
2026 DPHSeq -> Just dphSeqPackageId
2027 DPHThis -> Just (thisPackage dflags)
2030 setMainIs :: String -> DynP ()
2032 | not (null main_fn) && isLower (head main_fn)
2033 -- The arg looked like "Foo.Bar.baz"
2034 = upd $ \d -> d{ mainFunIs = Just main_fn,
2035 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2037 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2038 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2040 | otherwise -- The arg looked like "baz"
2041 = upd $ \d -> d{ mainFunIs = Just arg }
2043 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2045 -----------------------------------------------------------------------------
2046 -- Paths & Libraries
2048 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2050 -- -i on its own deletes the import paths
2051 addImportPath "" = upd (\s -> s{importPaths = []})
2052 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2056 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2059 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2061 addFrameworkPath p =
2062 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2064 #ifndef mingw32_TARGET_OS
2065 split_marker :: Char
2066 split_marker = ':' -- not configurable (ToDo)
2069 splitPathList :: String -> [String]
2070 splitPathList s = filter notNull (splitUp s)
2071 -- empty paths are ignored: there might be a trailing
2072 -- ':' in the initial list, for example. Empty paths can
2073 -- cause confusion when they are translated into -I options
2074 -- for passing to gcc.
2076 #ifndef mingw32_TARGET_OS
2077 splitUp xs = split split_marker xs
2079 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2081 -- That is, if "foo:bar:baz" is used, this interpreted as
2082 -- consisting of three entries, 'foo', 'bar', 'baz'.
2083 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2084 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2086 -- Notice that no attempt is made to fully replace the 'standard'
2087 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2088 -- that this will cause too much breakage for users & ':' will
2089 -- work fine even with DOS paths, if you're not insisting on being silly.
2092 splitUp (x:':':div:xs) | div `elem` dir_markers
2093 = ((x:':':div:p): splitUp rs)
2095 (p,rs) = findNextPath xs
2096 -- we used to check for existence of the path here, but that
2097 -- required the IO monad to be threaded through the command-line
2098 -- parser which is quite inconvenient. The
2099 splitUp xs = cons p (splitUp rs)
2101 (p,rs) = findNextPath xs
2106 -- will be called either when we've consumed nought or the
2107 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2108 -- finding the next split marker.
2110 case break (`elem` split_markers) xs of
2111 (p, _:ds) -> (p, ds)
2114 split_markers :: [Char]
2115 split_markers = [':', ';']
2117 dir_markers :: [Char]
2118 dir_markers = ['/', '\\']
2121 -- -----------------------------------------------------------------------------
2122 -- tmpDir, where we store temporary files.
2124 setTmpDir :: FilePath -> DynFlags -> DynFlags
2125 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2126 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2127 -- seem necessary now --SDM 7/2/2008
2129 -----------------------------------------------------------------------------
2132 setRtsOpts :: String -> DynP ()
2133 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2135 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2136 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2138 -----------------------------------------------------------------------------
2141 setOptHpcDir :: String -> DynP ()
2142 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2144 -----------------------------------------------------------------------------
2145 -- Via-C compilation stuff
2147 -- There are some options that we need to pass to gcc when compiling
2148 -- Haskell code via C, but are only supported by recent versions of
2149 -- gcc. The configure script decides which of these options we need,
2150 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2151 -- read before each via-C compilation. The advantage of having these
2152 -- in a separate file is that the file can be created at install-time
2153 -- depending on the available gcc version, and even re-generated later
2154 -- if gcc is upgraded.
2156 -- The options below are not dependent on the version of gcc, only the
2159 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2160 [String]) -- for registerised HC compilations
2161 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2162 in (cCcOpts ++ flagsAll, flagsRegHc)
2164 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2165 [String]) -- for registerised HC compilations
2166 machdepCCOpts' _dflags
2167 #if alpha_TARGET_ARCH
2169 #ifdef HAVE_THREADED_RTS_SUPPORT
2173 -- For now, to suppress the gcc warning "call-clobbered
2174 -- register used for global register variable", we simply
2175 -- disable all warnings altogether using the -w flag. Oh well.
2177 #elif hppa_TARGET_ARCH
2178 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2179 -- (very nice, but too bad the HP /usr/include files don't agree.)
2180 = ( ["-D_HPUX_SOURCE"], [] )
2182 #elif m68k_TARGET_ARCH
2183 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2184 -- popping of args to routines to be explicit; if we let things
2185 -- be deferred 'til after an STGJUMP, imminent death is certain!
2187 -- -fomit-frame-pointer : *don't*
2188 -- It's better to have a6 completely tied up being a frame pointer
2189 -- rather than let GCC pick random things to do with it.
2190 -- (If we want to steal a6, then we would try to do things
2191 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2192 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2194 #elif i386_TARGET_ARCH
2195 -- -fno-defer-pop : basically the same game as for m68k
2197 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2198 -- the fp (%ebp) for our register maps.
2199 = let n_regs = stolen_x86_regs _dflags
2202 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2205 "-fomit-frame-pointer",
2206 -- we want -fno-builtin, because when gcc inlines
2207 -- built-in functions like memcpy() it tends to
2208 -- run out of registers, requiring -monly-n-regs
2210 "-DSTOLEN_X86_REGS="++show n_regs ]
2213 #elif ia64_TARGET_ARCH
2214 = ( [], ["-fomit-frame-pointer", "-G0"] )
2216 #elif x86_64_TARGET_ARCH
2219 ["-fomit-frame-pointer",
2220 "-fno-asynchronous-unwind-tables",
2221 -- the unwind tables are unnecessary for HC code,
2222 -- and get in the way of -split-objs. Another option
2223 -- would be to throw them away in the mangler, but this
2226 -- calling builtins like strlen() using the FFI can
2227 -- cause gcc to run out of regs, so use the external
2231 #elif sparc_TARGET_ARCH
2233 -- For now, to suppress the gcc warning "call-clobbered
2234 -- register used for global register variable", we simply
2235 -- disable all warnings altogether using the -w flag. Oh well.
2237 #elif powerpc_apple_darwin_TARGET
2239 -- Disable Apple's precompiling preprocessor. It's a great thing
2240 -- for "normal" programs, but it doesn't support register variable
2242 = ( [], ["-no-cpp-precomp"] )
2247 picCCOpts :: DynFlags -> [String]
2249 #if darwin_TARGET_OS
2250 -- Apple prefers to do things the other way round.
2251 -- PIC is on by default.
2252 -- -mdynamic-no-pic:
2253 -- Turn off PIC code generation.
2255 -- Don't generate "common" symbols - these are unwanted
2256 -- in dynamic libraries.
2259 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2261 = ["-mdynamic-no-pic"]
2262 #elif mingw32_TARGET_OS
2263 -- no -fPIC for Windows
2265 = ["-U __PIC__","-D__PIC__"]
2269 -- we need -fPIC for C files when we are compiling with -dynamic,
2270 -- otherwise things like stub.c files don't get compiled
2271 -- correctly. They need to reference data in the Haskell
2272 -- objects, but can't without -fPIC. See
2273 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2274 | opt_PIC || not opt_Static
2275 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2280 -- -----------------------------------------------------------------------------
2284 can_split = cSupportsSplitObjs == "YES"
2286 -- -----------------------------------------------------------------------------
2289 data Printable = String String
2290 | FromDynFlags (DynFlags -> String)
2292 compilerInfo :: [(String, Printable)]
2293 compilerInfo = [("Project name", String cProjectName),
2294 ("Project version", String cProjectVersion),
2295 ("Booter version", String cBooterVersion),
2296 ("Stage", String cStage),
2297 ("Build platform", String cBuildPlatformString),
2298 ("Host platform", String cHostPlatformString),
2299 ("Target platform", String cTargetPlatformString),
2300 ("Have interpreter", String cGhcWithInterpreter),
2301 ("Object splitting supported", String cSupportsSplitObjs),
2302 ("Have native code generator", String cGhcWithNativeCodeGen),
2303 ("Support SMP", String cGhcWithSMP),
2304 ("Unregisterised", String cGhcUnregisterised),
2305 ("Tables next to code", String cGhcEnableTablesNextToCode),
2306 ("RTS ways", String cGhcRTSWays),
2307 ("Leading underscore", String cLeadingUnderscore),
2308 ("Debug on", String (show debugIsOn)),
2309 ("LibDir", FromDynFlags topDir),
2310 ("Global Package DB", FromDynFlags systemPackageConfig),
2311 ("C compiler flags", String (show cCcOpts)),
2312 ("Gcc Linker flags", String (show cGccLinkerOpts)),
2313 ("Ld Linker flags", String (show cLdLinkerOpts))