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(..), dphPackage,
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
104 import System.FilePath
105 import System.IO ( stderr, hPutChar )
107 -- -----------------------------------------------------------------------------
110 -- | Enumerates the simple on-or-off dynamic flags
116 | Opt_D_dump_cmmz_pretty
120 | Opt_D_dump_asm_native
121 | Opt_D_dump_asm_liveness
122 | Opt_D_dump_asm_coalesce
123 | Opt_D_dump_asm_regalloc
124 | Opt_D_dump_asm_regalloc_stages
125 | Opt_D_dump_asm_conflicts
126 | Opt_D_dump_asm_stats
127 | Opt_D_dump_asm_expanded
134 | Opt_D_dump_inlinings
135 | Opt_D_dump_rule_firings
136 | Opt_D_dump_rule_rewrites
137 | Opt_D_dump_occur_anal
141 | Opt_D_dump_simpl_iterations
142 | Opt_D_dump_simpl_phases
151 | Opt_D_dump_worker_wrapper
152 | Opt_D_dump_rn_trace
153 | Opt_D_dump_rn_stats
155 | Opt_D_dump_simpl_stats
156 | Opt_D_dump_cs_trace -- Constraint solver in type checker
157 | Opt_D_dump_tc_trace
158 | Opt_D_dump_if_trace
165 | Opt_D_verbose_core2core
166 | Opt_D_verbose_stg2stg
168 | Opt_D_dump_hi_diffs
169 | Opt_D_dump_minimal_imports
170 | Opt_D_dump_mod_cycles
171 | Opt_D_dump_view_pattern_commoning
172 | Opt_D_faststring_stats
173 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
174 | Opt_D_no_debug_output
180 | Opt_WarnIsError -- -Werror; makes warnings fatal
181 | Opt_WarnDuplicateExports
183 | Opt_WarnImplicitPrelude
184 | Opt_WarnIncompletePatterns
185 | Opt_WarnIncompleteUniPatterns
186 | Opt_WarnIncompletePatternsRecUpd
187 | Opt_WarnMissingFields
188 | Opt_WarnMissingImportList
189 | Opt_WarnMissingMethods
190 | Opt_WarnMissingSigs
191 | Opt_WarnMissingLocalSigs
192 | Opt_WarnNameShadowing
193 | Opt_WarnOverlappingPatterns
194 | Opt_WarnTypeDefaults
195 | Opt_WarnMonomorphism
196 | Opt_WarnUnusedBinds
197 | Opt_WarnUnusedImports
198 | Opt_WarnUnusedMatches
199 | Opt_WarnWarningsDeprecations
200 | Opt_WarnDeprecatedFlags
201 | Opt_WarnDodgyExports
202 | Opt_WarnDodgyImports
204 | Opt_WarnAutoOrphans
207 | Opt_WarnUnrecognisedPragmas
208 | Opt_WarnDodgyForeignImports
209 | Opt_WarnLazyUnliftedBindings
210 | Opt_WarnUnusedDoBind
211 | Opt_WarnWrongDoBind
212 | Opt_WarnAlternativeLayoutRuleTransitional
214 | Opt_PrintExplicitForalls
221 | Opt_StaticArgumentTransformation
225 | Opt_DoLambdaEtaExpansion
229 | Opt_UnboxStrictFields
230 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
232 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
234 | Opt_RegsGraph -- do graph coloring register allocation
235 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
238 | Opt_IgnoreInterfacePragmas
239 | Opt_OmitInterfacePragmas
240 | Opt_ExposeAllUnfoldings
243 | Opt_AutoSccsOnAllToplevs
244 | Opt_AutoSccsOnExportedToplevs
245 | Opt_AutoSccsOnIndividualCafs
252 | Opt_ExcessPrecision
253 | Opt_EagerBlackHoling
254 | Opt_ReadUserPackageConf
258 | Opt_HideAllPackages
259 | Opt_PrintBindResult
263 | Opt_BreakOnException
265 | Opt_PrintEvldWithShow
266 | Opt_PrintBindContents
269 | Opt_EmitExternalCore
271 | Opt_BuildingCabalPackage
279 | Opt_ConvertToZipCfgAndBack
280 | Opt_AutoLinkPackages
281 | Opt_ImplicitImportQualified
290 | Opt_KeepRawTokenStream
295 data Language = Haskell98 | Haskell2010
299 | Opt_OverlappingInstances
300 | Opt_UndecidableInstances
301 | Opt_IncoherentInstances
302 | Opt_MonomorphismRestriction
305 | Opt_RelaxedPolyRec -- Deprecated
306 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
307 | Opt_ForeignFunctionInterface
308 | Opt_UnliftedFFITypes
309 | Opt_GHCForeignImportPrim
310 | Opt_ParallelArrays -- Syntactic support for parallel arrays
311 | Opt_Arrows -- Arrow-notation syntax
312 | Opt_TemplateHaskell
315 | Opt_Generics -- "Derivable type classes"
316 | Opt_ImplicitPrelude
317 | Opt_ScopedTypeVariables
321 | Opt_OverloadedStrings
322 | Opt_DisambiguateRecordFields
323 | Opt_RecordWildCards
329 | Opt_DoAndIfThenElse
330 | Opt_RebindableSyntax
332 | Opt_StandaloneDeriving
333 | Opt_DeriveDataTypeable
335 | Opt_DeriveTraversable
338 | Opt_TypeSynonymInstances
339 | Opt_FlexibleContexts
340 | Opt_FlexibleInstances
341 | Opt_ConstrainedClassMethods
342 | Opt_MultiParamTypeClasses
343 | Opt_FunctionalDependencies
345 | Opt_PolymorphicComponents
346 | Opt_ExistentialQuantification
350 | Opt_ParallelListComp
351 | Opt_TransformListComp
352 | Opt_GeneralizedNewtypeDeriving
355 | Opt_PostfixOperators
358 | Opt_LiberalTypeSynonyms
361 | Opt_ImpredicativeTypes
365 | Opt_AlternativeLayoutRule
366 | Opt_AlternativeLayoutRuleTransitional
367 | Opt_DatatypeContexts
368 | Opt_NondecreasingIndentation
372 -- | Contains not only a collection of 'DynFlag's but also a plethora of
373 -- information relating to the compilation of a single file or GHC session
374 data DynFlags = DynFlags {
377 hscTarget :: HscTarget,
378 hscOutName :: String, -- ^ Name of the output file
379 extCoreName :: String, -- ^ Name of the .hcr output file
380 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
381 optLevel :: Int, -- ^ Optimisation level
382 simplPhases :: Int, -- ^ Number of simplifier phases
383 maxSimplIterations :: Int, -- ^ Max simplifier iterations
384 shouldDumpSimplPhase :: Maybe String,
385 ruleCheck :: Maybe String,
386 strictnessBefore :: [Int], -- ^ Additional demand analysis
388 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
389 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
390 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
391 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
392 -- See CoreMonad.FloatOutSwitches
394 #ifndef OMIT_NATIVE_CODEGEN
395 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
397 stolen_x86_regs :: Int,
398 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
399 importPaths :: [FilePath],
401 mainFunIs :: Maybe String,
402 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
404 dphBackend :: DPHBackend,
406 thisPackage :: PackageId, -- ^ name of package currently being compiled
409 ways :: [Way], -- ^ Way flags from the command line
410 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
411 rtsBuildTag :: String, -- ^ The RTS \"way\"
413 -- For object splitting
414 splitInfo :: Maybe (String,Int),
417 objectDir :: Maybe String,
418 dylibInstallName :: Maybe String,
419 hiDir :: Maybe String,
420 stubDir :: Maybe String,
426 outputFile :: Maybe String,
427 outputHi :: Maybe String,
428 dynLibLoader :: DynLibLoader,
430 -- | This is set by 'DriverPipeline.runPipeline' based on where
431 -- its output is going.
432 dumpPrefix :: Maybe FilePath,
434 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
435 -- Set by @-ddump-file-prefix@
436 dumpPrefixForce :: Maybe FilePath,
438 includePaths :: [String],
439 libraryPaths :: [String],
440 frameworkPaths :: [String], -- used on darwin only
441 cmdlineFrameworks :: [String], -- ditto
442 tmpDir :: String, -- no trailing '/'
444 ghcUsagePath :: FilePath, -- Filled in by SysTools
445 ghciUsagePath :: FilePath, -- ditto
446 rtsOpts :: Maybe String,
447 rtsOptsEnabled :: RtsOptsEnabled,
449 hpcDir :: String, -- ^ Path to store the .mix files
451 -- options for particular phases
459 opt_windres :: [String],
460 opt_lo :: [String], -- LLVM: llvm optimiser
461 opt_lc :: [String], -- LLVM: llc static compiler
463 -- commands for particular phases
465 pgm_P :: (String,[Option]),
467 pgm_c :: (String,[Option]),
468 pgm_m :: (String,[Option]),
469 pgm_s :: (String,[Option]),
470 pgm_a :: (String,[Option]),
471 pgm_l :: (String,[Option]),
472 pgm_dll :: (String,[Option]),
474 pgm_sysman :: String,
475 pgm_windres :: String,
476 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
477 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
480 depMakefile :: FilePath,
481 depIncludePkgDeps :: Bool,
482 depExcludeMods :: [ModuleName],
483 depSuffixes :: [String],
486 extraPkgConfs :: [FilePath],
487 topDir :: FilePath, -- filled in by SysTools
488 systemPackageConfig :: FilePath, -- ditto
489 -- ^ The @-package-conf@ flags given on the command line, in the order
492 packageFlags :: [PackageFlag],
493 -- ^ The @-package@ and @-hide-package@ flags from the command-line
496 -- NB. do not modify this field, it is calculated by
497 -- Packages.initPackages and Packages.updatePackages.
498 pkgDatabase :: Maybe [PackageConfig],
499 pkgState :: PackageState,
502 -- These have to be IORefs, because the defaultCleanupHandler needs to
503 -- know what to clean when an exception happens
504 filesToClean :: IORef [FilePath],
505 dirsToClean :: IORef (Map FilePath FilePath),
509 -- Don't change this without updating extensionFlags:
510 language :: Maybe Language,
511 -- Don't change this without updating extensionFlags:
512 extensions :: [OnOff ExtensionFlag],
513 -- extensionFlags should always be equal to
514 -- flattenExtensionFlags language extensions
515 extensionFlags :: [ExtensionFlag],
517 -- | Message output action: use "ErrUtils" instead of this if you can
518 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
520 haddockOptions :: Maybe String
523 wayNames :: DynFlags -> [WayName]
524 wayNames = map wayName . ways
526 -- | The target code type of the compilation (if any).
528 -- Whenever you change the target, also make sure to set 'ghcLink' to
529 -- something sensible.
531 -- 'HscNothing' can be used to avoid generating any output, however, note
534 -- * This will not run the desugaring step, thus no warnings generated in
535 -- this step will be output. In particular, this includes warnings related
536 -- to pattern matching. You can run the desugarer manually using
537 -- 'GHC.desugarModule'.
539 -- * If a program uses Template Haskell the typechecker may try to run code
540 -- from an imported module. This will fail if no code has been generated
541 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
542 -- whether this might be the case and choose to either switch to a
543 -- different target or avoid typechecking such modules. (The latter may
544 -- preferable for security reasons.)
547 = HscC -- ^ Generate C code.
548 | HscAsm -- ^ Generate assembly using the native code generator.
549 | HscLlvm -- ^ Generate assembly using the llvm code generator.
550 | HscJava -- ^ Generate Java bytecode.
551 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
552 | HscNothing -- ^ Don't generate any code. See notes above.
555 -- | Will this target result in an object file on the disk?
556 isObjectTarget :: HscTarget -> Bool
557 isObjectTarget HscC = True
558 isObjectTarget HscAsm = True
559 isObjectTarget HscLlvm = True
560 isObjectTarget _ = False
562 -- | The 'GhcMode' tells us whether we're doing multi-module
563 -- compilation (controlled via the "GHC" API) or one-shot
564 -- (single-module) compilation. This makes a difference primarily to
565 -- the "Finder": in one-shot mode we look for interface files for
566 -- imported modules, but in multi-module mode we look for source files
567 -- in order to check whether they need to be recompiled.
569 = CompManager -- ^ @\-\-make@, GHCi, etc.
570 | OneShot -- ^ @ghc -c Foo.hs@
571 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
574 instance Outputable GhcMode where
575 ppr CompManager = ptext (sLit "CompManager")
576 ppr OneShot = ptext (sLit "OneShot")
577 ppr MkDepend = ptext (sLit "MkDepend")
579 isOneShot :: GhcMode -> Bool
580 isOneShot OneShot = True
581 isOneShot _other = False
583 -- | What to do in the link step, if there is one.
585 = NoLink -- ^ Don't link at all
586 | LinkBinary -- ^ Link object code into a binary
587 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
588 -- bytecode and object code).
589 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
592 isNoLink :: GhcLink -> Bool
593 isNoLink NoLink = True
596 -- Is it worth evaluating this Bool and caching it in the DynFlags value
597 -- during initDynFlags?
598 doingTickyProfiling :: DynFlags -> Bool
599 doingTickyProfiling _ = opt_Ticky
600 -- XXX -ticky is a static flag, because it implies -debug which is also
601 -- static. If the way flags were made dynamic, we could fix this.
604 = ExposePackage String
605 | ExposePackageId String
607 | IgnorePackage String
610 defaultHscTarget :: HscTarget
611 defaultHscTarget = defaultObjectTarget
613 -- | The 'HscTarget' value corresponding to the default way to create
614 -- object files on the current platform.
615 defaultObjectTarget :: HscTarget
617 | cGhcWithNativeCodeGen == "YES" = HscAsm
625 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
627 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
628 initDynFlags :: DynFlags -> IO DynFlags
629 initDynFlags dflags = do
630 -- someday these will be dynamic flags
631 ways <- readIORef v_Ways
632 refFilesToClean <- newIORef []
633 refDirsToClean <- newIORef Map.empty
636 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
637 rtsBuildTag = mkBuildTag ways,
638 filesToClean = refFilesToClean,
639 dirsToClean = refDirsToClean
642 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
643 -- and must be fully initialized by 'GHC.newSession' first.
644 defaultDynFlags :: DynFlags
647 ghcMode = CompManager,
648 ghcLink = LinkBinary,
649 hscTarget = defaultHscTarget,
655 maxSimplIterations = 4,
656 shouldDumpSimplPhase = Nothing,
658 specConstrThreshold = Just 200,
659 specConstrCount = Just 3,
660 liberateCaseThreshold = Just 200,
661 floatLamArgs = Just 0, -- Default: float only if no fvs
662 strictnessBefore = [],
664 #ifndef OMIT_NATIVE_CODEGEN
665 targetPlatform = defaultTargetPlatform,
668 cmdlineHcIncludes = [],
672 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
674 dphBackend = DPHNone,
676 thisPackage = mainPackageId,
679 dylibInstallName = Nothing,
683 objectSuf = phaseInputExt StopLn,
684 hcSuf = phaseInputExt HCc,
687 outputFile = Nothing,
689 dynLibLoader = SystemDependent,
690 dumpPrefix = Nothing,
691 dumpPrefixForce = Nothing,
695 cmdlineFrameworks = [],
696 tmpDir = cDEFAULT_TMPDIR,
698 rtsOptsEnabled = RtsOptsSafeOnly,
704 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
717 pkgDatabase = Nothing,
718 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
719 ways = panic "defaultDynFlags: No ways",
720 buildTag = panic "defaultDynFlags: No buildTag",
721 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
723 -- initSysTools fills all these in
724 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
725 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
726 topDir = panic "defaultDynFlags: No topDir",
727 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
728 pgm_L = panic "defaultDynFlags: No pgm_L",
729 pgm_P = panic "defaultDynFlags: No pgm_P",
730 pgm_F = panic "defaultDynFlags: No pgm_F",
731 pgm_c = panic "defaultDynFlags: No pgm_c",
732 pgm_m = panic "defaultDynFlags: No pgm_m",
733 pgm_s = panic "defaultDynFlags: No pgm_s",
734 pgm_a = panic "defaultDynFlags: No pgm_a",
735 pgm_l = panic "defaultDynFlags: No pgm_l",
736 pgm_dll = panic "defaultDynFlags: No pgm_dll",
737 pgm_T = panic "defaultDynFlags: No pgm_T",
738 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
739 pgm_windres = panic "defaultDynFlags: No pgm_windres",
740 pgm_lo = panic "defaultDynFlags: No pgm_lo",
741 pgm_lc = panic "defaultDynFlags: No pgm_lc",
742 -- end of initSysTools values
744 depMakefile = "Makefile",
745 depIncludePkgDeps = False,
748 -- end of ghc -M values
749 filesToClean = panic "defaultDynFlags: No filesToClean",
750 dirsToClean = panic "defaultDynFlags: No dirsToClean",
751 haddockOptions = Nothing,
752 flags = defaultFlags,
755 extensionFlags = flattenExtensionFlags Nothing [],
757 log_action = \severity srcSpan style msg ->
759 SevOutput -> printOutput (msg style)
760 SevInfo -> printErrs (msg style)
761 SevFatal -> printErrs (msg style)
764 printErrs ((mkLocMessage srcSpan msg) style)
765 -- careful (#2302): printErrs prints in UTF-8, whereas
766 -- converting to string first and using hPutStr would
767 -- just emit the low 8 bits of each unicode char.
771 Note [Verbosity levels]
772 ~~~~~~~~~~~~~~~~~~~~~~~
773 0 | print errors & warnings only
774 1 | minimal verbosity: print "compiling M ... done." for each module.
775 2 | equivalent to -dshow-passes
776 3 | equivalent to existing "ghc -v"
777 4 | "ghc -v -ddump-most"
778 5 | "ghc -v -ddump-all"
784 -- OnOffs accumulate in reverse order, so we use foldr in order to
785 -- process them in the right order
786 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
788 flattenExtensionFlags ml = foldr f defaultExtensionFlags
789 where f (On f) flags = f : delete f flags
790 f (Off f) flags = delete f flags
791 defaultExtensionFlags = languageExtensions ml
793 languageExtensions :: Maybe Language -> [ExtensionFlag]
795 languageExtensions Nothing
796 -- Nothing => the default case
797 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
798 -- behaviour the default, to see if anyone notices
800 -- In due course I'd like Opt_MonoLocalBinds to be on by default
801 -- But NB it's implied by GADTs etc
802 -- SLPJ September 2010
803 : Opt_NondecreasingIndentation -- This has been on by default for some time
804 : languageExtensions (Just Haskell2010)
806 languageExtensions (Just Haskell98)
807 = [Opt_ImplicitPrelude,
808 Opt_MonomorphismRestriction,
810 Opt_DatatypeContexts,
811 Opt_NondecreasingIndentation
812 -- strictly speaking non-standard, but we always had this
813 -- on implicitly before the option was added in 7.1, and
814 -- turning it off breaks code, so we're keeping it on for
815 -- backwards compatibility. Cabal uses -XHaskell98 by
816 -- default unless you specify another language.
819 languageExtensions (Just Haskell2010)
820 = [Opt_ImplicitPrelude,
821 Opt_MonomorphismRestriction,
822 Opt_DatatypeContexts,
824 Opt_ForeignFunctionInterface,
829 -- | Test whether a 'DynFlag' is set
830 dopt :: DynFlag -> DynFlags -> Bool
831 dopt f dflags = f `elem` (flags dflags)
834 dopt_set :: DynFlags -> DynFlag -> DynFlags
835 dopt_set dfs f = dfs{ flags = f : flags dfs }
837 -- | Unset a 'DynFlag'
838 dopt_unset :: DynFlags -> DynFlag -> DynFlags
839 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
841 -- | Test whether a 'ExtensionFlag' is set
842 xopt :: ExtensionFlag -> DynFlags -> Bool
843 xopt f dflags = f `elem` extensionFlags dflags
845 -- | Set a 'ExtensionFlag'
846 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
848 = let onoffs = On f : extensions dfs
849 in dfs { extensions = onoffs,
850 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
852 -- | Unset a 'ExtensionFlag'
853 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
855 = let onoffs = Off f : extensions dfs
856 in dfs { extensions = onoffs,
857 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
859 setLanguage :: Language -> DynP ()
860 setLanguage l = upd f
861 where f dfs = let mLang = Just l
862 oneoffs = extensions dfs
865 extensionFlags = flattenExtensionFlags mLang oneoffs
868 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
869 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
870 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
871 -> [a] -- ^ Correctly ordered extracted options
872 getOpts dflags opts = reverse (opts dflags)
873 -- We add to the options from the front, so we need to reverse the list
875 -- | Gets the verbosity flag for the current verbosity level. This is fed to
876 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
877 getVerbFlag :: DynFlags -> String
879 | verbosity dflags >= 3 = "-v"
882 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
883 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
884 setPgmP, addOptl, addOptP,
885 addCmdlineFramework, addHaddockOpts
886 :: String -> DynFlags -> DynFlags
887 setOutputFile, setOutputHi, setDumpPrefixForce
888 :: Maybe String -> DynFlags -> DynFlags
890 setObjectDir f d = d{ objectDir = Just f}
891 setHiDir f d = d{ hiDir = Just f}
892 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
893 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
894 -- \#included from the .hc file when compiling with -fvia-C.
895 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
896 setDylibInstallName f d = d{ dylibInstallName = Just f}
898 setObjectSuf f d = d{ objectSuf = f}
899 setHiSuf f d = d{ hiSuf = f}
900 setHcSuf f d = d{ hcSuf = f}
902 setOutputFile f d = d{ outputFile = f}
903 setOutputHi f d = d{ outputHi = f}
905 parseDynLibLoaderMode f d =
907 ("deploy", "") -> d{ dynLibLoader = Deployable }
908 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
909 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
911 setDumpPrefixForce f d = d { dumpPrefixForce = f}
913 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
914 -- Config.hs should really use Option.
915 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
916 addOptl f d = d{ opt_l = f : opt_l d}
917 addOptP f d = d{ opt_P = f : opt_P d}
920 setDepMakefile :: FilePath -> DynFlags -> DynFlags
921 setDepMakefile f d = d { depMakefile = deOptDep f }
923 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
924 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
926 addDepExcludeMod :: String -> DynFlags -> DynFlags
928 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
930 addDepSuffix :: FilePath -> DynFlags -> DynFlags
931 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
934 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
935 -- we need to strip the "-optdep" off of the arg
936 deOptDep :: String -> String
937 deOptDep x = case stripPrefix "-optdep" x of
941 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
943 addHaddockOpts f d = d{ haddockOptions = Just f}
945 -- -----------------------------------------------------------------------------
946 -- Command-line options
948 -- | When invoking external tools as part of the compilation pipeline, we
949 -- pass these a sequence of options on the command-line. Rather than
950 -- just using a list of Strings, we use a type that allows us to distinguish
951 -- between filepaths and 'other stuff'. The reason for this is that
952 -- this type gives us a handle on transforming filenames, and filenames only,
953 -- to whatever format they're expected to be on a particular platform.
955 = FileOption -- an entry that _contains_ filename(s) / filepaths.
956 String -- a non-filepath prefix that shouldn't be
957 -- transformed (e.g., "/out=")
958 String -- the filepath/filename portion
961 showOpt :: Option -> String
962 showOpt (FileOption pre f) = pre ++ f
963 showOpt (Option s) = s
965 -----------------------------------------------------------------------------
966 -- Setting the optimisation level
968 updOptLevel :: Int -> DynFlags -> DynFlags
969 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
971 = dfs2{ optLevel = final_n }
973 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
974 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
975 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
977 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
978 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
980 -- -----------------------------------------------------------------------------
981 -- StgToDo: abstraction of stg-to-stg passes to run.
984 = StgDoMassageForProfiling -- should be (next to) last
985 -- There's also setStgVarInfo, but its absolute "lastness"
986 -- is so critical that it is hardwired in (no flag).
989 getStgToDo :: DynFlags -> [StgToDo]
993 stg_stats = dopt Opt_StgStats dflags
995 todo1 = if stg_stats then [D_stg_stats] else []
997 todo2 | WayProf `elem` wayNames dflags
998 = StgDoMassageForProfiling : todo1
1002 {- **********************************************************************
1006 %********************************************************************* -}
1008 -- -----------------------------------------------------------------------------
1009 -- Parsing the dynamic flags.
1011 -- | Parse dynamic flags from a list of command line arguments. Returns the
1012 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1013 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1014 -- flags or missing arguments).
1015 parseDynamicFlags :: Monad m =>
1016 DynFlags -> [Located String]
1017 -> m (DynFlags, [Located String], [Located String])
1018 -- ^ Updated 'DynFlags', left-over arguments, and
1019 -- list of warnings.
1020 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1022 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1023 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1024 parseDynamicNoPackageFlags :: Monad m =>
1025 DynFlags -> [Located String]
1026 -> m (DynFlags, [Located String], [Located String])
1027 -- ^ Updated 'DynFlags', left-over arguments, and
1028 -- list of warnings.
1029 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1031 parseDynamicFlags_ :: Monad m =>
1032 DynFlags -> [Located String] -> Bool
1033 -> m (DynFlags, [Located String], [Located String])
1034 parseDynamicFlags_ dflags0 args pkg_flags = do
1035 -- XXX Legacy support code
1036 -- We used to accept things like
1037 -- optdep-f -optdepdepend
1038 -- optdep-f -optdep depend
1039 -- optdep -f -optdepdepend
1040 -- optdep -f -optdep depend
1041 -- but the spaces trip up proper argument handling. So get rid of them.
1042 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1043 f (x : xs) = x : f xs
1047 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1048 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1049 | otherwise = dynamic_flags
1051 let ((leftover, errs, warns), dflags1)
1052 = runCmdLine (processArgs flag_spec args') dflags0
1053 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1055 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1056 -- isn't up to the job. We know that if hscTarget == HscC, then the
1057 -- user has explicitly used -fvia-C, because -fasm is the default,
1058 -- unless there is no NCG on this platform. The latter case is
1059 -- checked when the -fPIC flag is parsed.
1061 let (pic_warns, dflags2)
1062 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1063 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1064 dflags1{ hscTarget = HscAsm })
1065 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1066 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1067 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1068 ++ "dynamic on this platform;\n ignoring -fllvm"],
1069 dflags1{ hscTarget = HscAsm })
1071 | otherwise = ([], dflags1)
1073 return (dflags2, leftover, pic_warns ++ warns)
1076 {- **********************************************************************
1078 DynFlags specifications
1080 %********************************************************************* -}
1082 allFlags :: [String]
1083 allFlags = map ('-':) $
1084 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1085 map ("fno-"++) flags ++
1086 map ("f"++) flags ++
1087 map ("f"++) flags' ++
1088 map ("X"++) supportedExtensions
1089 where ok (PrefixPred _ _) = False
1091 flags = [ name | (name, _, _) <- fFlags ]
1092 flags' = [ name | (name, _, _) <- fLangFlags ]
1094 --------------- The main flags themselves ------------------
1095 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1097 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1098 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1099 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1101 (HasArg (\s -> do { addCmdlineHCInclude s
1102 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1103 , Flag "v" (OptIntSuffix setVerbosity)
1105 ------- Specific phases --------------------------------------------
1106 -- need to appear before -pgmL to be parsed as LLVM flags.
1107 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1108 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1109 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1110 , Flag "pgmP" (hasArg setPgmP)
1111 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1112 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1113 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1114 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1115 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1116 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1117 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1118 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1120 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1121 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1122 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1123 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1124 , Flag "optP" (hasArg addOptP)
1125 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1126 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1127 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1128 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1129 , Flag "optl" (hasArg addOptl)
1130 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1133 (NoArg (if can_split
1134 then setDynFlag Opt_SplitObjs
1135 else addWarn "ignoring -fsplit-objs"))
1137 -------- ghc -M -----------------------------------------------------
1138 , Flag "dep-suffix" (hasArg addDepSuffix)
1139 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1140 , Flag "dep-makefile" (hasArg setDepMakefile)
1141 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1142 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1143 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1144 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1145 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1146 , Flag "exclude-module" (hasArg addDepExcludeMod)
1147 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1148 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1150 -------- Linking ----------------------------------------------------
1151 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1152 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1153 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1154 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1156 ------- Libraries ---------------------------------------------------
1157 , Flag "L" (Prefix addLibraryPath)
1158 , Flag "l" (AnySuffix (upd . addOptl))
1160 ------- Frameworks --------------------------------------------------
1161 -- -framework-path should really be -F ...
1162 , Flag "framework-path" (HasArg addFrameworkPath)
1163 , Flag "framework" (hasArg addCmdlineFramework)
1165 ------- Output Redirection ------------------------------------------
1166 , Flag "odir" (hasArg setObjectDir)
1167 , Flag "o" (SepArg (upd . setOutputFile . Just))
1168 , Flag "ohi" (hasArg (setOutputHi . Just ))
1169 , Flag "osuf" (hasArg setObjectSuf)
1170 , Flag "hcsuf" (hasArg setHcSuf)
1171 , Flag "hisuf" (hasArg setHiSuf)
1172 , Flag "hidir" (hasArg setHiDir)
1173 , Flag "tmpdir" (hasArg setTmpDir)
1174 , Flag "stubdir" (hasArg setStubDir)
1175 , Flag "outputdir" (hasArg setOutputDir)
1176 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1178 ------- Keeping temporary files -------------------------------------
1179 -- These can be singular (think ghc -c) or plural (think ghc --make)
1180 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1181 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1182 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1183 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1184 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1185 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1186 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1187 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1188 -- This only makes sense as plural
1189 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1191 ------- Miscellaneous ----------------------------------------------
1192 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1193 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1194 , Flag "with-rtsopts" (HasArg setRtsOpts)
1195 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1196 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1197 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1198 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1199 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1200 , Flag "main-is" (SepArg setMainIs)
1201 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1202 , Flag "haddock-opts" (hasArg addHaddockOpts)
1203 , Flag "hpcdir" (SepArg setOptHpcDir)
1205 ------- recompilation checker --------------------------------------
1206 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1207 ; deprecate "Use -fno-force-recomp instead" }))
1208 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1209 ; deprecate "Use -fforce-recomp instead" }))
1211 ------ HsCpp opts ---------------------------------------------------
1212 , Flag "D" (AnySuffix (upd . addOptP))
1213 , Flag "U" (AnySuffix (upd . addOptP))
1215 ------- Include/Import Paths ----------------------------------------
1216 , Flag "I" (Prefix addIncludePath)
1217 , Flag "i" (OptPrefix addImportPath)
1219 ------ Debugging ----------------------------------------------------
1220 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1222 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1223 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1224 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1225 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1226 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1227 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1228 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1229 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1230 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1231 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1232 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1233 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1234 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1235 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1236 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1237 ; setDumpFlag' Opt_D_dump_llvm}))
1238 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1239 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1240 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1241 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1242 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1243 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1244 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1245 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1246 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1247 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1248 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1249 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1250 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1251 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1252 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1253 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1254 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1255 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1256 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1257 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1258 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1259 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1260 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1261 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1262 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1263 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1264 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1265 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1266 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1267 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1268 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1269 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1270 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1271 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1272 ; setVerboseCore2Core }))
1273 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1274 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1275 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1276 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1277 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1278 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1279 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1280 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1281 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1282 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1283 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1284 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1285 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1286 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1287 , Flag "dshow-passes" (NoArg (do forceRecompile
1288 setVerbosity (Just 2)))
1289 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1291 ------ Machine dependant (-m<blah>) stuff ---------------------------
1293 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1294 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1295 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1296 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1298 ------ Warning opts -------------------------------------------------
1299 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1300 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1301 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1302 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1303 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1304 ; deprecate "Use -w instead" }))
1305 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1307 ------ Optimisation flags ------------------------------------------
1308 , Flag "O" (noArg (setOptLevel 1))
1309 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1310 , Flag "Odph" (noArg setDPHOpt)
1311 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1312 -- If the number is missing, use 1
1314 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1315 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1316 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1317 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1318 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1319 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1320 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1321 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1322 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1323 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1324 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1325 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1326 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1328 ------ Profiling ----------------------------------------------------
1330 -- XXX Should the -f* flags be deprecated?
1331 -- They don't seem to be documented
1332 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1333 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1334 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1335 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1336 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1337 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1338 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1339 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1340 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1342 ------ DPH flags ----------------------------------------------------
1344 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1345 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1346 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1347 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1349 ------ Compiler flags -----------------------------------------------
1351 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1352 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1353 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1354 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1355 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1356 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1358 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1359 setTarget HscNothing))
1360 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1361 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1362 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1363 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1365 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1366 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1367 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1368 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1369 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1370 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1371 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1373 package_flags :: [Flag (CmdLineP DynFlags)]
1375 ------- Packages ----------------------------------------------------
1376 Flag "package-conf" (HasArg extraPkgConf_)
1377 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1378 , Flag "package-name" (hasArg setPackageName)
1379 , Flag "package-id" (HasArg exposePackageId)
1380 , Flag "package" (HasArg exposePackage)
1381 , Flag "hide-package" (HasArg hidePackage)
1382 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1383 , Flag "ignore-package" (HasArg ignorePackage)
1384 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1385 ; deprecate "Use -package instead" }))
1388 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1389 -- False <=> we are turning the flag off
1390 turnOn :: TurnOnFlag; turnOn = True
1391 turnOff :: TurnOnFlag; turnOff = False
1394 = ( String -- Flag in string form
1395 , flag -- Flag in internal form
1396 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1397 -- Typically, emit a warning or error
1399 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1400 -> String -- ^ The flag prefix
1401 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1402 -> FlagSpec flag -- ^ Specification of this particular flag
1403 -> Flag (CmdLineP DynFlags)
1404 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1405 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1407 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1408 deprecatedForExtension lang turn_on
1409 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1411 flag | turn_on = lang
1412 | otherwise = "No"++lang
1414 useInstead :: String -> TurnOnFlag -> DynP ()
1415 useInstead flag turn_on
1416 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1418 no = if turn_on then "" else "no-"
1420 nop :: TurnOnFlag -> DynP ()
1423 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1424 fFlags :: [FlagSpec DynFlag]
1426 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1427 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1428 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1429 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1430 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1431 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1432 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1433 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1434 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1435 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1436 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1437 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1438 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1439 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1440 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1441 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1442 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1443 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1444 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1445 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1446 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1447 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1448 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1449 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1450 ( "warn-orphans", Opt_WarnOrphans, nop ),
1451 ( "warn-identities", Opt_WarnIdentities, nop ),
1452 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1453 ( "warn-tabs", Opt_WarnTabs, nop ),
1454 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1455 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1456 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1457 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1458 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1459 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1460 ( "strictness", Opt_Strictness, nop ),
1461 ( "specialise", Opt_Specialise, nop ),
1462 ( "float-in", Opt_FloatIn, nop ),
1463 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1464 ( "full-laziness", Opt_FullLaziness, nop ),
1465 ( "liberate-case", Opt_LiberateCase, nop ),
1466 ( "spec-constr", Opt_SpecConstr, nop ),
1467 ( "cse", Opt_CSE, nop ),
1468 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1469 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1470 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1471 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1472 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1473 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1474 ( "case-merge", Opt_CaseMerge, nop ),
1475 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1476 ( "method-sharing", Opt_MethodSharing,
1477 \_ -> deprecate "doesn't do anything any more"),
1478 -- Remove altogether in GHC 7.2
1479 ( "dicts-cheap", Opt_DictsCheap, nop ),
1480 ( "excess-precision", Opt_ExcessPrecision, nop ),
1481 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1482 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1483 ( "print-bind-result", Opt_PrintBindResult, nop ),
1484 ( "force-recomp", Opt_ForceRecomp, nop ),
1485 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1486 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1487 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1488 ( "break-on-exception", Opt_BreakOnException, nop ),
1489 ( "break-on-error", Opt_BreakOnError, nop ),
1490 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1491 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1492 ( "run-cps", Opt_RunCPS, nop ),
1493 ( "run-cpsz", Opt_RunCPSZ, nop ),
1494 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1495 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1496 ( "vectorise", Opt_Vectorise, nop ),
1497 ( "regs-graph", Opt_RegsGraph, nop ),
1498 ( "regs-iterative", Opt_RegsIterative, nop ),
1499 ( "gen-manifest", Opt_GenManifest, nop ),
1500 ( "embed-manifest", Opt_EmbedManifest, nop ),
1501 ( "ext-core", Opt_EmitExternalCore, nop ),
1502 ( "shared-implib", Opt_SharedImplib, nop ),
1503 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1504 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1505 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1506 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1509 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1510 fLangFlags :: [FlagSpec ExtensionFlag]
1512 ( "th", Opt_TemplateHaskell,
1513 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1514 ( "fi", Opt_ForeignFunctionInterface,
1515 deprecatedForExtension "ForeignFunctionInterface" ),
1516 ( "ffi", Opt_ForeignFunctionInterface,
1517 deprecatedForExtension "ForeignFunctionInterface" ),
1518 ( "arrows", Opt_Arrows,
1519 deprecatedForExtension "Arrows" ),
1520 ( "generics", Opt_Generics,
1521 deprecatedForExtension "Generics" ),
1522 ( "implicit-prelude", Opt_ImplicitPrelude,
1523 deprecatedForExtension "ImplicitPrelude" ),
1524 ( "bang-patterns", Opt_BangPatterns,
1525 deprecatedForExtension "BangPatterns" ),
1526 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1527 deprecatedForExtension "MonomorphismRestriction" ),
1528 ( "mono-pat-binds", Opt_MonoPatBinds,
1529 deprecatedForExtension "MonoPatBinds" ),
1530 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1531 deprecatedForExtension "ExtendedDefaultRules" ),
1532 ( "implicit-params", Opt_ImplicitParams,
1533 deprecatedForExtension "ImplicitParams" ),
1534 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1535 deprecatedForExtension "ScopedTypeVariables" ),
1536 ( "parr", Opt_ParallelArrays,
1537 deprecatedForExtension "ParallelArrays" ),
1538 ( "PArr", Opt_ParallelArrays,
1539 deprecatedForExtension "ParallelArrays" ),
1540 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1541 deprecatedForExtension "OverlappingInstances" ),
1542 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1543 deprecatedForExtension "UndecidableInstances" ),
1544 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1545 deprecatedForExtension "IncoherentInstances" )
1548 supportedLanguages :: [String]
1549 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1551 supportedExtensions :: [String]
1552 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1554 supportedLanguagesAndExtensions :: [String]
1555 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1557 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1558 languageFlags :: [FlagSpec Language]
1560 ( "Haskell98", Haskell98, nop ),
1561 ( "Haskell2010", Haskell2010, nop )
1564 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1565 xFlags :: [FlagSpec ExtensionFlag]
1567 ( "CPP", Opt_Cpp, nop ),
1568 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1569 ( "TupleSections", Opt_TupleSections, nop ),
1570 ( "PatternGuards", Opt_PatternGuards, nop ),
1571 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1572 ( "MagicHash", Opt_MagicHash, nop ),
1573 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1574 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1575 ( "KindSignatures", Opt_KindSignatures, nop ),
1576 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1577 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1578 ( "TransformListComp", Opt_TransformListComp, nop ),
1579 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1580 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1581 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1582 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1583 ( "Rank2Types", Opt_Rank2Types, nop ),
1584 ( "RankNTypes", Opt_RankNTypes, nop ),
1585 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1586 ( "TypeOperators", Opt_TypeOperators, nop ),
1587 ( "RecursiveDo", Opt_RecursiveDo,
1588 deprecatedForExtension "DoRec"),
1589 ( "DoRec", Opt_DoRec, nop ),
1590 ( "Arrows", Opt_Arrows, nop ),
1591 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1592 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1593 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1594 ( "Generics", Opt_Generics, nop ),
1595 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1596 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1597 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1598 ( "RecordPuns", Opt_RecordPuns,
1599 deprecatedForExtension "NamedFieldPuns" ),
1600 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1601 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1602 ( "GADTs", Opt_GADTs, nop ),
1603 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1604 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1605 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1606 ( "BangPatterns", Opt_BangPatterns, nop ),
1607 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1608 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1609 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1610 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1611 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1612 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1613 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1614 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1615 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1616 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1617 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1618 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1619 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1620 \ turn_on -> if not turn_on
1621 then deprecate "You can't turn off RelaxedPolyRec any more"
1623 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1624 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1625 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1627 ( "PatternSignatures", Opt_ScopedTypeVariables,
1628 deprecatedForExtension "ScopedTypeVariables" ),
1630 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1631 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1632 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1633 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1634 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1635 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1636 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1637 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1638 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1639 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1640 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1641 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1642 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1643 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1644 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1645 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1646 ( "PackageImports", Opt_PackageImports, nop )
1649 defaultFlags :: [DynFlag]
1651 = [ Opt_AutoLinkPackages,
1652 Opt_ReadUserPackageConf,
1660 Opt_PrintBindContents,
1665 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1666 -- The default -O0 options
1670 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1672 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1673 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1674 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1675 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1676 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1677 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1678 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1680 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1682 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1683 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1684 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1686 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1687 -- all over the place
1689 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1691 -- Record wild-cards implies field disambiguation
1692 -- Otherwise if you write (C {..}) you may well get
1693 -- stuff like " 'a' not in scope ", which is a bit silly
1694 -- if the compiler has just filled in field 'a' of constructor 'C'
1695 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1697 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1700 optLevelFlags :: [([Int], DynFlag)]
1702 = [ ([0], Opt_IgnoreInterfacePragmas)
1703 , ([0], Opt_OmitInterfacePragmas)
1705 , ([1,2], Opt_IgnoreAsserts)
1706 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1708 , ([1,2], Opt_DoEtaReduction)
1709 , ([1,2], Opt_CaseMerge)
1710 , ([1,2], Opt_Strictness)
1712 , ([1,2], Opt_FullLaziness)
1713 , ([1,2], Opt_Specialise)
1714 , ([1,2], Opt_FloatIn)
1716 , ([2], Opt_LiberateCase)
1717 , ([2], Opt_SpecConstr)
1718 , ([2], Opt_RegsGraph)
1720 -- , ([2], Opt_StaticArgumentTransformation)
1721 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1722 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1723 -- several improvements to the heuristics, and I'm concerned that without
1724 -- those changes SAT will interfere with some attempts to write "high
1725 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1726 -- this year. In particular, the version in HEAD lacks the tail call
1727 -- criterion, so many things that look like reasonable loops will be
1728 -- turned into functions with extra (unneccesary) thunk creation.
1730 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1731 -- This one is important for a tiresome reason:
1732 -- we want to make sure that the bindings for data
1733 -- constructors are eta-expanded. This is probably
1734 -- a good thing anyway, but it seems fragile.
1737 -- -----------------------------------------------------------------------------
1738 -- Standard sets of warning options
1740 standardWarnings :: [DynFlag]
1742 = [ Opt_WarnWarningsDeprecations,
1743 Opt_WarnDeprecatedFlags,
1744 Opt_WarnUnrecognisedPragmas,
1745 Opt_WarnOverlappingPatterns,
1746 Opt_WarnMissingFields,
1747 Opt_WarnMissingMethods,
1748 Opt_WarnDuplicateExports,
1749 Opt_WarnLazyUnliftedBindings,
1750 Opt_WarnDodgyForeignImports,
1751 Opt_WarnWrongDoBind,
1752 Opt_WarnAlternativeLayoutRuleTransitional
1755 minusWOpts :: [DynFlag]
1756 -- Things you get with -W
1758 = standardWarnings ++
1759 [ Opt_WarnUnusedBinds,
1760 Opt_WarnUnusedMatches,
1761 Opt_WarnUnusedImports,
1762 Opt_WarnIncompletePatterns,
1763 Opt_WarnDodgyExports,
1764 Opt_WarnDodgyImports
1767 minusWallOpts :: [DynFlag]
1768 -- Things you get with -Wall
1771 [ Opt_WarnTypeDefaults,
1772 Opt_WarnNameShadowing,
1773 Opt_WarnMissingSigs,
1776 Opt_WarnUnusedDoBind
1779 minuswRemovesOpts :: [DynFlag]
1780 -- minuswRemovesOpts should be every warning option
1784 Opt_WarnIncompletePatternsRecUpd,
1785 Opt_WarnIncompleteUniPatterns,
1786 Opt_WarnMonomorphism,
1787 Opt_WarnUnrecognisedPragmas,
1788 Opt_WarnAutoOrphans,
1789 Opt_WarnImplicitPrelude
1792 enableGlasgowExts :: DynP ()
1793 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1794 mapM_ setExtensionFlag glasgowExtsFlags
1796 disableGlasgowExts :: DynP ()
1797 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1798 mapM_ unSetExtensionFlag glasgowExtsFlags
1800 glasgowExtsFlags :: [ExtensionFlag]
1801 glasgowExtsFlags = [
1802 Opt_ForeignFunctionInterface
1803 , Opt_UnliftedFFITypes
1804 , Opt_ImplicitParams
1805 , Opt_ScopedTypeVariables
1807 , Opt_TypeSynonymInstances
1808 , Opt_StandaloneDeriving
1809 , Opt_DeriveDataTypeable
1811 , Opt_DeriveFoldable
1812 , Opt_DeriveTraversable
1813 , Opt_FlexibleContexts
1814 , Opt_FlexibleInstances
1815 , Opt_ConstrainedClassMethods
1816 , Opt_MultiParamTypeClasses
1817 , Opt_FunctionalDependencies
1819 , Opt_PolymorphicComponents
1820 , Opt_ExistentialQuantification
1822 , Opt_PostfixOperators
1824 , Opt_LiberalTypeSynonyms
1828 , Opt_ParallelListComp
1829 , Opt_EmptyDataDecls
1830 , Opt_KindSignatures
1831 , Opt_GeneralizedNewtypeDeriving ]
1834 -- Consult the RTS to find whether GHC itself has been built profiled
1835 -- If so, you can't use Template Haskell
1836 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1838 rtsIsProfiled :: Bool
1839 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1841 checkTemplateHaskellOk :: Bool -> DynP ()
1842 checkTemplateHaskellOk turn_on
1843 | turn_on && rtsIsProfiled
1844 = addErr "You can't use Template Haskell with a profiled compiler"
1848 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1849 -- so we simply say "ok". It doesn't matter because TH isn't
1850 -- available in stage 1 anyway.
1851 checkTemplateHaskellOk turn_on = return ()
1854 {- **********************************************************************
1856 DynFlags constructors
1858 %********************************************************************* -}
1860 type DynP = EwM (CmdLineP DynFlags)
1862 upd :: (DynFlags -> DynFlags) -> DynP ()
1863 upd f = liftEwM (do { dfs <- getCmdLineState
1864 ; putCmdLineState $! (f dfs) })
1866 --------------- Constructor functions for OptKind -----------------
1867 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1868 noArg fn = NoArg (upd fn)
1870 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1871 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1873 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1874 hasArg fn = HasArg (upd . fn)
1876 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1877 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1878 ; deprecate deprec })
1880 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1881 intSuffix fn = IntSuffix (\n -> upd (fn n))
1883 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1884 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1886 --------------------------
1887 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1888 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1889 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1891 --------------------------
1892 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1893 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1896 deps = [ if turn_on then setExtensionFlag d
1897 else unSetExtensionFlag d
1898 | (f', turn_on, d) <- impliedFlags, f' == f ]
1899 -- When you set f, set the ones it implies
1900 -- NB: use setExtensionFlag recursively, in case the implied flags
1901 -- implies further flags
1903 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1904 -- When you un-set f, however, we don't un-set the things it implies
1905 -- (except for -fno-glasgow-exts, which is treated specially)
1907 --------------------------
1908 setDumpFlag' :: DynFlag -> DynP ()
1909 setDumpFlag' dump_flag
1910 = do { setDynFlag dump_flag
1911 ; when want_recomp forceRecompile }
1913 -- Certain dumpy-things are really interested in what's going
1914 -- on during recompilation checking, so in those cases we
1915 -- don't want to turn it off.
1916 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1917 Opt_D_dump_hi_diffs]
1919 forceRecompile :: DynP ()
1920 -- Whenver we -ddump, force recompilation (by switching off the
1921 -- recompilation checker), else you don't see the dump! However,
1922 -- don't switch it off in --make mode, else *everything* gets
1923 -- recompiled which probably isn't what you want
1924 forceRecompile = do { dfs <- liftEwM getCmdLineState
1925 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1927 force_recomp dfs = isOneShot (ghcMode dfs)
1929 setVerboseCore2Core :: DynP ()
1930 setVerboseCore2Core = do forceRecompile
1931 setDynFlag Opt_D_verbose_core2core
1932 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1935 setDumpSimplPhases :: String -> DynP ()
1936 setDumpSimplPhases s = do forceRecompile
1937 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1939 spec = case s of { ('=' : s') -> s'; _ -> s }
1941 setVerbosity :: Maybe Int -> DynP ()
1942 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1944 addCmdlineHCInclude :: String -> DynP ()
1945 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1947 extraPkgConf_ :: FilePath -> DynP ()
1948 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1950 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1952 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1954 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1956 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1958 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1960 setPackageName :: String -> DynFlags -> DynFlags
1961 setPackageName p s = s{ thisPackage = stringToPackageId p }
1963 -- If we're linking a binary, then only targets that produce object
1964 -- code are allowed (requests for other target types are ignored).
1965 setTarget :: HscTarget -> DynP ()
1966 setTarget l = upd set
1969 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1972 -- Changes the target only if we're compiling object code. This is
1973 -- used by -fasm and -fvia-C, which switch from one to the other, but
1974 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1975 -- can be safely used in an OPTIONS_GHC pragma.
1976 setObjTarget :: HscTarget -> DynP ()
1977 setObjTarget l = upd set
1980 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1983 setOptLevel :: Int -> DynFlags -> DynFlags
1984 setOptLevel n dflags
1985 | hscTarget dflags == HscInterpreted && n > 0
1987 -- not in IO any more, oh well:
1988 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1990 = updOptLevel n dflags
1993 -- -Odph is equivalent to
1995 -- -O2 optimise as much as possible
1996 -- -fmax-simplifier-iterations20 this is necessary sometimes
1997 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
1999 setDPHOpt :: DynFlags -> DynFlags
2000 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2004 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2005 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2006 -- vectoriser cannot be used.
2008 data DPHBackend = DPHPar -- "dph-par"
2009 | DPHSeq -- "dph-seq"
2010 | DPHThis -- the currently compiled package
2011 | DPHNone -- no DPH library available
2012 deriving(Eq, Ord, Enum, Show)
2014 setDPHBackend :: DPHBackend -> DynP ()
2015 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2017 -- Query the DPH backend package to be used by the vectoriser.
2019 dphPackage :: DynFlags -> PackageId
2021 = case dphBackend dflags of
2022 DPHPar -> dphParPackageId
2023 DPHSeq -> dphSeqPackageId
2024 DPHThis -> thisPackage dflags
2025 DPHNone -> ghcError (CmdLineError dphBackendError)
2027 dphBackendError :: String
2028 dphBackendError = "To use -fvectorise select a DPH backend with -fdph-par or -fdph-seq"
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))