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_ModalTypes -- Heterogeneous Metaprogramming (modal types, brackets, escape, CSP)
315 | Opt_TemplateHaskell
318 | Opt_Generics -- "Derivable type classes"
319 | Opt_ImplicitPrelude
320 | Opt_ScopedTypeVariables
324 | Opt_OverloadedStrings
325 | Opt_DisambiguateRecordFields
326 | Opt_RecordWildCards
332 | Opt_DoAndIfThenElse
333 | Opt_RebindableSyntax
335 | Opt_StandaloneDeriving
336 | Opt_DeriveDataTypeable
338 | Opt_DeriveTraversable
341 | Opt_TypeSynonymInstances
342 | Opt_FlexibleContexts
343 | Opt_FlexibleInstances
344 | Opt_ConstrainedClassMethods
345 | Opt_MultiParamTypeClasses
346 | Opt_FunctionalDependencies
348 | Opt_PolymorphicComponents
349 | Opt_ExistentialQuantification
353 | Opt_ParallelListComp
354 | Opt_TransformListComp
355 | Opt_GeneralizedNewtypeDeriving
358 | Opt_PostfixOperators
361 | Opt_LiberalTypeSynonyms
364 | Opt_ImpredicativeTypes
368 | Opt_AlternativeLayoutRule
369 | Opt_AlternativeLayoutRuleTransitional
370 | Opt_DatatypeContexts
371 | Opt_NondecreasingIndentation
375 -- | Contains not only a collection of 'DynFlag's but also a plethora of
376 -- information relating to the compilation of a single file or GHC session
377 data DynFlags = DynFlags {
380 hscTarget :: HscTarget,
381 hscOutName :: String, -- ^ Name of the output file
382 extCoreName :: String, -- ^ Name of the .hcr output file
383 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
384 optLevel :: Int, -- ^ Optimisation level
385 simplPhases :: Int, -- ^ Number of simplifier phases
386 maxSimplIterations :: Int, -- ^ Max simplifier iterations
387 shouldDumpSimplPhase :: Maybe String,
388 ruleCheck :: Maybe String,
389 strictnessBefore :: [Int], -- ^ Additional demand analysis
391 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
392 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
393 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
394 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
395 -- See CoreMonad.FloatOutSwitches
397 #ifndef OMIT_NATIVE_CODEGEN
398 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
400 stolen_x86_regs :: Int,
401 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
402 importPaths :: [FilePath],
404 mainFunIs :: Maybe String,
405 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
407 dphBackend :: DPHBackend,
409 thisPackage :: PackageId, -- ^ name of package currently being compiled
412 ways :: [Way], -- ^ Way flags from the command line
413 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
414 rtsBuildTag :: String, -- ^ The RTS \"way\"
416 -- For object splitting
417 splitInfo :: Maybe (String,Int),
420 objectDir :: Maybe String,
421 dylibInstallName :: Maybe String,
422 hiDir :: Maybe String,
423 stubDir :: Maybe String,
429 outputFile :: Maybe String,
430 outputHi :: Maybe String,
431 dynLibLoader :: DynLibLoader,
433 -- | This is set by 'DriverPipeline.runPipeline' based on where
434 -- its output is going.
435 dumpPrefix :: Maybe FilePath,
437 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
438 -- Set by @-ddump-file-prefix@
439 dumpPrefixForce :: Maybe FilePath,
441 includePaths :: [String],
442 libraryPaths :: [String],
443 frameworkPaths :: [String], -- used on darwin only
444 cmdlineFrameworks :: [String], -- ditto
445 tmpDir :: String, -- no trailing '/'
447 ghcUsagePath :: FilePath, -- Filled in by SysTools
448 ghciUsagePath :: FilePath, -- ditto
449 rtsOpts :: Maybe String,
450 rtsOptsEnabled :: RtsOptsEnabled,
452 hpcDir :: String, -- ^ Path to store the .mix files
454 -- options for particular phases
462 opt_windres :: [String],
463 opt_lo :: [String], -- LLVM: llvm optimiser
464 opt_lc :: [String], -- LLVM: llc static compiler
466 -- commands for particular phases
468 pgm_P :: (String,[Option]),
470 pgm_c :: (String,[Option]),
471 pgm_m :: (String,[Option]),
472 pgm_s :: (String,[Option]),
473 pgm_a :: (String,[Option]),
474 pgm_l :: (String,[Option]),
475 pgm_dll :: (String,[Option]),
477 pgm_sysman :: String,
478 pgm_windres :: String,
479 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
480 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
483 depMakefile :: FilePath,
484 depIncludePkgDeps :: Bool,
485 depExcludeMods :: [ModuleName],
486 depSuffixes :: [String],
489 extraPkgConfs :: [FilePath],
490 topDir :: FilePath, -- filled in by SysTools
491 systemPackageConfig :: FilePath, -- ditto
492 -- ^ The @-package-conf@ flags given on the command line, in the order
495 packageFlags :: [PackageFlag],
496 -- ^ The @-package@ and @-hide-package@ flags from the command-line
499 -- NB. do not modify this field, it is calculated by
500 -- Packages.initPackages and Packages.updatePackages.
501 pkgDatabase :: Maybe [PackageConfig],
502 pkgState :: PackageState,
505 -- These have to be IORefs, because the defaultCleanupHandler needs to
506 -- know what to clean when an exception happens
507 filesToClean :: IORef [FilePath],
508 dirsToClean :: IORef (Map FilePath FilePath),
512 -- Don't change this without updating extensionFlags:
513 language :: Maybe Language,
514 -- Don't change this without updating extensionFlags:
515 extensions :: [OnOff ExtensionFlag],
516 -- extensionFlags should always be equal to
517 -- flattenExtensionFlags language extensions
518 extensionFlags :: [ExtensionFlag],
520 -- | Message output action: use "ErrUtils" instead of this if you can
521 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
523 haddockOptions :: Maybe String
526 wayNames :: DynFlags -> [WayName]
527 wayNames = map wayName . ways
529 -- | The target code type of the compilation (if any).
531 -- Whenever you change the target, also make sure to set 'ghcLink' to
532 -- something sensible.
534 -- 'HscNothing' can be used to avoid generating any output, however, note
537 -- * This will not run the desugaring step, thus no warnings generated in
538 -- this step will be output. In particular, this includes warnings related
539 -- to pattern matching. You can run the desugarer manually using
540 -- 'GHC.desugarModule'.
542 -- * If a program uses Template Haskell the typechecker may try to run code
543 -- from an imported module. This will fail if no code has been generated
544 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
545 -- whether this might be the case and choose to either switch to a
546 -- different target or avoid typechecking such modules. (The latter may
547 -- preferable for security reasons.)
550 = HscC -- ^ Generate C code.
551 | HscAsm -- ^ Generate assembly using the native code generator.
552 | HscLlvm -- ^ Generate assembly using the llvm code generator.
553 | HscJava -- ^ Generate Java bytecode.
554 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
555 | HscNothing -- ^ Don't generate any code. See notes above.
558 -- | Will this target result in an object file on the disk?
559 isObjectTarget :: HscTarget -> Bool
560 isObjectTarget HscC = True
561 isObjectTarget HscAsm = True
562 isObjectTarget HscLlvm = True
563 isObjectTarget _ = False
565 -- | The 'GhcMode' tells us whether we're doing multi-module
566 -- compilation (controlled via the "GHC" API) or one-shot
567 -- (single-module) compilation. This makes a difference primarily to
568 -- the "Finder": in one-shot mode we look for interface files for
569 -- imported modules, but in multi-module mode we look for source files
570 -- in order to check whether they need to be recompiled.
572 = CompManager -- ^ @\-\-make@, GHCi, etc.
573 | OneShot -- ^ @ghc -c Foo.hs@
574 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
577 instance Outputable GhcMode where
578 ppr CompManager = ptext (sLit "CompManager")
579 ppr OneShot = ptext (sLit "OneShot")
580 ppr MkDepend = ptext (sLit "MkDepend")
582 isOneShot :: GhcMode -> Bool
583 isOneShot OneShot = True
584 isOneShot _other = False
586 -- | What to do in the link step, if there is one.
588 = NoLink -- ^ Don't link at all
589 | LinkBinary -- ^ Link object code into a binary
590 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
591 -- bytecode and object code).
592 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
595 isNoLink :: GhcLink -> Bool
596 isNoLink NoLink = True
599 -- Is it worth evaluating this Bool and caching it in the DynFlags value
600 -- during initDynFlags?
601 doingTickyProfiling :: DynFlags -> Bool
602 doingTickyProfiling _ = opt_Ticky
603 -- XXX -ticky is a static flag, because it implies -debug which is also
604 -- static. If the way flags were made dynamic, we could fix this.
607 = ExposePackage String
608 | ExposePackageId String
610 | IgnorePackage String
613 defaultHscTarget :: HscTarget
614 defaultHscTarget = defaultObjectTarget
616 -- | The 'HscTarget' value corresponding to the default way to create
617 -- object files on the current platform.
618 defaultObjectTarget :: HscTarget
620 | cGhcWithNativeCodeGen == "YES" = HscAsm
628 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
630 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
631 initDynFlags :: DynFlags -> IO DynFlags
632 initDynFlags dflags = do
633 -- someday these will be dynamic flags
634 ways <- readIORef v_Ways
635 refFilesToClean <- newIORef []
636 refDirsToClean <- newIORef Map.empty
639 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
640 rtsBuildTag = mkBuildTag ways,
641 filesToClean = refFilesToClean,
642 dirsToClean = refDirsToClean
645 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
646 -- and must be fully initialized by 'GHC.newSession' first.
647 defaultDynFlags :: DynFlags
650 ghcMode = CompManager,
651 ghcLink = LinkBinary,
652 hscTarget = defaultHscTarget,
658 maxSimplIterations = 4,
659 shouldDumpSimplPhase = Nothing,
661 specConstrThreshold = Just 200,
662 specConstrCount = Just 3,
663 liberateCaseThreshold = Just 200,
664 floatLamArgs = Just 0, -- Default: float only if no fvs
665 strictnessBefore = [],
667 #ifndef OMIT_NATIVE_CODEGEN
668 targetPlatform = defaultTargetPlatform,
671 cmdlineHcIncludes = [],
675 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
677 dphBackend = DPHNone,
679 thisPackage = mainPackageId,
682 dylibInstallName = Nothing,
686 objectSuf = phaseInputExt StopLn,
687 hcSuf = phaseInputExt HCc,
690 outputFile = Nothing,
692 dynLibLoader = SystemDependent,
693 dumpPrefix = Nothing,
694 dumpPrefixForce = Nothing,
698 cmdlineFrameworks = [],
699 tmpDir = cDEFAULT_TMPDIR,
701 rtsOptsEnabled = RtsOptsSafeOnly,
707 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
720 pkgDatabase = Nothing,
721 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
722 ways = panic "defaultDynFlags: No ways",
723 buildTag = panic "defaultDynFlags: No buildTag",
724 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
726 -- initSysTools fills all these in
727 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
728 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
729 topDir = panic "defaultDynFlags: No topDir",
730 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
731 pgm_L = panic "defaultDynFlags: No pgm_L",
732 pgm_P = panic "defaultDynFlags: No pgm_P",
733 pgm_F = panic "defaultDynFlags: No pgm_F",
734 pgm_c = panic "defaultDynFlags: No pgm_c",
735 pgm_m = panic "defaultDynFlags: No pgm_m",
736 pgm_s = panic "defaultDynFlags: No pgm_s",
737 pgm_a = panic "defaultDynFlags: No pgm_a",
738 pgm_l = panic "defaultDynFlags: No pgm_l",
739 pgm_dll = panic "defaultDynFlags: No pgm_dll",
740 pgm_T = panic "defaultDynFlags: No pgm_T",
741 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
742 pgm_windres = panic "defaultDynFlags: No pgm_windres",
743 pgm_lo = panic "defaultDynFlags: No pgm_lo",
744 pgm_lc = panic "defaultDynFlags: No pgm_lc",
745 -- end of initSysTools values
747 depMakefile = "Makefile",
748 depIncludePkgDeps = False,
751 -- end of ghc -M values
752 filesToClean = panic "defaultDynFlags: No filesToClean",
753 dirsToClean = panic "defaultDynFlags: No dirsToClean",
754 haddockOptions = Nothing,
755 flags = defaultFlags,
758 extensionFlags = flattenExtensionFlags Nothing [],
760 log_action = \severity srcSpan style msg ->
762 SevOutput -> printOutput (msg style)
763 SevInfo -> printErrs (msg style)
764 SevFatal -> printErrs (msg style)
767 printErrs ((mkLocMessage srcSpan msg) style)
768 -- careful (#2302): printErrs prints in UTF-8, whereas
769 -- converting to string first and using hPutStr would
770 -- just emit the low 8 bits of each unicode char.
774 Note [Verbosity levels]
775 ~~~~~~~~~~~~~~~~~~~~~~~
776 0 | print errors & warnings only
777 1 | minimal verbosity: print "compiling M ... done." for each module.
778 2 | equivalent to -dshow-passes
779 3 | equivalent to existing "ghc -v"
780 4 | "ghc -v -ddump-most"
781 5 | "ghc -v -ddump-all"
787 -- OnOffs accumulate in reverse order, so we use foldr in order to
788 -- process them in the right order
789 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
791 flattenExtensionFlags ml = foldr f defaultExtensionFlags
792 where f (On f) flags = f : delete f flags
793 f (Off f) flags = delete f flags
794 defaultExtensionFlags = languageExtensions ml
796 languageExtensions :: Maybe Language -> [ExtensionFlag]
798 languageExtensions Nothing
799 -- Nothing => the default case
800 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
801 -- behaviour the default, to see if anyone notices
803 -- In due course I'd like Opt_MonoLocalBinds to be on by default
804 -- But NB it's implied by GADTs etc
805 -- SLPJ September 2010
806 : Opt_NondecreasingIndentation -- This has been on by default for some time
807 : languageExtensions (Just Haskell2010)
809 languageExtensions (Just Haskell98)
810 = [Opt_ImplicitPrelude,
811 Opt_MonomorphismRestriction,
813 Opt_DatatypeContexts,
814 Opt_NondecreasingIndentation
815 -- strictly speaking non-standard, but we always had this
816 -- on implicitly before the option was added in 7.1, and
817 -- turning it off breaks code, so we're keeping it on for
818 -- backwards compatibility. Cabal uses -XHaskell98 by
819 -- default unless you specify another language.
822 languageExtensions (Just Haskell2010)
823 = [Opt_ImplicitPrelude,
824 Opt_MonomorphismRestriction,
825 Opt_DatatypeContexts,
827 Opt_ForeignFunctionInterface,
832 -- | Test whether a 'DynFlag' is set
833 dopt :: DynFlag -> DynFlags -> Bool
834 dopt f dflags = f `elem` (flags dflags)
837 dopt_set :: DynFlags -> DynFlag -> DynFlags
838 dopt_set dfs f = dfs{ flags = f : flags dfs }
840 -- | Unset a 'DynFlag'
841 dopt_unset :: DynFlags -> DynFlag -> DynFlags
842 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
844 -- | Test whether a 'ExtensionFlag' is set
845 xopt :: ExtensionFlag -> DynFlags -> Bool
846 xopt f dflags = f `elem` extensionFlags dflags
848 -- | Set a 'ExtensionFlag'
849 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
851 = let onoffs = On f : extensions dfs
852 in dfs { extensions = onoffs,
853 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
855 -- | Unset a 'ExtensionFlag'
856 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
858 = let onoffs = Off f : extensions dfs
859 in dfs { extensions = onoffs,
860 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
862 setLanguage :: Language -> DynP ()
863 setLanguage l = upd f
864 where f dfs = let mLang = Just l
865 oneoffs = extensions dfs
868 extensionFlags = flattenExtensionFlags mLang oneoffs
871 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
872 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
873 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
874 -> [a] -- ^ Correctly ordered extracted options
875 getOpts dflags opts = reverse (opts dflags)
876 -- We add to the options from the front, so we need to reverse the list
878 -- | Gets the verbosity flag for the current verbosity level. This is fed to
879 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
880 getVerbFlag :: DynFlags -> String
882 | verbosity dflags >= 3 = "-v"
885 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
886 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
887 setPgmP, addOptl, addOptP,
888 addCmdlineFramework, addHaddockOpts
889 :: String -> DynFlags -> DynFlags
890 setOutputFile, setOutputHi, setDumpPrefixForce
891 :: Maybe String -> DynFlags -> DynFlags
893 setObjectDir f d = d{ objectDir = Just f}
894 setHiDir f d = d{ hiDir = Just f}
895 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
896 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
897 -- \#included from the .hc file when compiling with -fvia-C.
898 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
899 setDylibInstallName f d = d{ dylibInstallName = Just f}
901 setObjectSuf f d = d{ objectSuf = f}
902 setHiSuf f d = d{ hiSuf = f}
903 setHcSuf f d = d{ hcSuf = f}
905 setOutputFile f d = d{ outputFile = f}
906 setOutputHi f d = d{ outputHi = f}
908 parseDynLibLoaderMode f d =
910 ("deploy", "") -> d{ dynLibLoader = Deployable }
911 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
912 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
914 setDumpPrefixForce f d = d { dumpPrefixForce = f}
916 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
917 -- Config.hs should really use Option.
918 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
919 addOptl f d = d{ opt_l = f : opt_l d}
920 addOptP f d = d{ opt_P = f : opt_P d}
923 setDepMakefile :: FilePath -> DynFlags -> DynFlags
924 setDepMakefile f d = d { depMakefile = deOptDep f }
926 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
927 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
929 addDepExcludeMod :: String -> DynFlags -> DynFlags
931 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
933 addDepSuffix :: FilePath -> DynFlags -> DynFlags
934 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
937 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
938 -- we need to strip the "-optdep" off of the arg
939 deOptDep :: String -> String
940 deOptDep x = case stripPrefix "-optdep" x of
944 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
946 addHaddockOpts f d = d{ haddockOptions = Just f}
948 -- -----------------------------------------------------------------------------
949 -- Command-line options
951 -- | When invoking external tools as part of the compilation pipeline, we
952 -- pass these a sequence of options on the command-line. Rather than
953 -- just using a list of Strings, we use a type that allows us to distinguish
954 -- between filepaths and 'other stuff'. The reason for this is that
955 -- this type gives us a handle on transforming filenames, and filenames only,
956 -- to whatever format they're expected to be on a particular platform.
958 = FileOption -- an entry that _contains_ filename(s) / filepaths.
959 String -- a non-filepath prefix that shouldn't be
960 -- transformed (e.g., "/out=")
961 String -- the filepath/filename portion
964 showOpt :: Option -> String
965 showOpt (FileOption pre f) = pre ++ f
966 showOpt (Option s) = s
968 -----------------------------------------------------------------------------
969 -- Setting the optimisation level
971 updOptLevel :: Int -> DynFlags -> DynFlags
972 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
974 = dfs2{ optLevel = final_n }
976 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
977 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
978 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
980 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
981 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
983 -- -----------------------------------------------------------------------------
984 -- StgToDo: abstraction of stg-to-stg passes to run.
987 = StgDoMassageForProfiling -- should be (next to) last
988 -- There's also setStgVarInfo, but its absolute "lastness"
989 -- is so critical that it is hardwired in (no flag).
992 getStgToDo :: DynFlags -> [StgToDo]
996 stg_stats = dopt Opt_StgStats dflags
998 todo1 = if stg_stats then [D_stg_stats] else []
1000 todo2 | WayProf `elem` wayNames dflags
1001 = StgDoMassageForProfiling : todo1
1005 {- **********************************************************************
1009 %********************************************************************* -}
1011 -- -----------------------------------------------------------------------------
1012 -- Parsing the dynamic flags.
1014 -- | Parse dynamic flags from a list of command line arguments. Returns the
1015 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1016 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1017 -- flags or missing arguments).
1018 parseDynamicFlags :: Monad m =>
1019 DynFlags -> [Located String]
1020 -> m (DynFlags, [Located String], [Located String])
1021 -- ^ Updated 'DynFlags', left-over arguments, and
1022 -- list of warnings.
1023 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1025 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1026 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1027 parseDynamicNoPackageFlags :: Monad m =>
1028 DynFlags -> [Located String]
1029 -> m (DynFlags, [Located String], [Located String])
1030 -- ^ Updated 'DynFlags', left-over arguments, and
1031 -- list of warnings.
1032 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1034 parseDynamicFlags_ :: Monad m =>
1035 DynFlags -> [Located String] -> Bool
1036 -> m (DynFlags, [Located String], [Located String])
1037 parseDynamicFlags_ dflags0 args pkg_flags = do
1038 -- XXX Legacy support code
1039 -- We used to accept things like
1040 -- optdep-f -optdepdepend
1041 -- optdep-f -optdep depend
1042 -- optdep -f -optdepdepend
1043 -- optdep -f -optdep depend
1044 -- but the spaces trip up proper argument handling. So get rid of them.
1045 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1046 f (x : xs) = x : f xs
1050 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1051 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1052 | otherwise = dynamic_flags
1054 let ((leftover, errs, warns), dflags1)
1055 = runCmdLine (processArgs flag_spec args') dflags0
1056 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1058 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1059 -- isn't up to the job. We know that if hscTarget == HscC, then the
1060 -- user has explicitly used -fvia-C, because -fasm is the default,
1061 -- unless there is no NCG on this platform. The latter case is
1062 -- checked when the -fPIC flag is parsed.
1064 let (pic_warns, dflags2)
1065 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1066 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1067 dflags1{ hscTarget = HscAsm })
1068 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1069 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1070 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1071 ++ "dynamic on this platform;\n ignoring -fllvm"],
1072 dflags1{ hscTarget = HscAsm })
1074 | otherwise = ([], dflags1)
1076 return (dflags2, leftover, pic_warns ++ warns)
1079 {- **********************************************************************
1081 DynFlags specifications
1083 %********************************************************************* -}
1085 allFlags :: [String]
1086 allFlags = map ('-':) $
1087 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1088 map ("fno-"++) flags ++
1089 map ("f"++) flags ++
1090 map ("f"++) flags' ++
1091 map ("X"++) supportedExtensions
1092 where ok (PrefixPred _ _) = False
1094 flags = [ name | (name, _, _) <- fFlags ]
1095 flags' = [ name | (name, _, _) <- fLangFlags ]
1097 --------------- The main flags themselves ------------------
1098 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1100 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1101 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1102 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1104 (HasArg (\s -> do { addCmdlineHCInclude s
1105 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1106 , Flag "v" (OptIntSuffix setVerbosity)
1108 ------- Specific phases --------------------------------------------
1109 -- need to appear before -pgmL to be parsed as LLVM flags.
1110 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1111 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1112 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1113 , Flag "pgmP" (hasArg setPgmP)
1114 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1115 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1116 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1117 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1118 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1119 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1120 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1121 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1123 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1124 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1125 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1126 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1127 , Flag "optP" (hasArg addOptP)
1128 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1129 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1130 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1131 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1132 , Flag "optl" (hasArg addOptl)
1133 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1136 (NoArg (if can_split
1137 then setDynFlag Opt_SplitObjs
1138 else addWarn "ignoring -fsplit-objs"))
1140 -------- ghc -M -----------------------------------------------------
1141 , Flag "dep-suffix" (hasArg addDepSuffix)
1142 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1143 , Flag "dep-makefile" (hasArg setDepMakefile)
1144 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1145 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1146 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1147 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1148 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1149 , Flag "exclude-module" (hasArg addDepExcludeMod)
1150 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1151 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1153 -------- Linking ----------------------------------------------------
1154 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1155 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1156 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1157 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1159 ------- Libraries ---------------------------------------------------
1160 , Flag "L" (Prefix addLibraryPath)
1161 , Flag "l" (AnySuffix (upd . addOptl))
1163 ------- Frameworks --------------------------------------------------
1164 -- -framework-path should really be -F ...
1165 , Flag "framework-path" (HasArg addFrameworkPath)
1166 , Flag "framework" (hasArg addCmdlineFramework)
1168 ------- Output Redirection ------------------------------------------
1169 , Flag "odir" (hasArg setObjectDir)
1170 , Flag "o" (SepArg (upd . setOutputFile . Just))
1171 , Flag "ohi" (hasArg (setOutputHi . Just ))
1172 , Flag "osuf" (hasArg setObjectSuf)
1173 , Flag "hcsuf" (hasArg setHcSuf)
1174 , Flag "hisuf" (hasArg setHiSuf)
1175 , Flag "hidir" (hasArg setHiDir)
1176 , Flag "tmpdir" (hasArg setTmpDir)
1177 , Flag "stubdir" (hasArg setStubDir)
1178 , Flag "outputdir" (hasArg setOutputDir)
1179 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1181 ------- Keeping temporary files -------------------------------------
1182 -- These can be singular (think ghc -c) or plural (think ghc --make)
1183 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1184 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1185 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1186 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1187 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1188 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1189 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1190 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1191 -- This only makes sense as plural
1192 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1194 ------- Miscellaneous ----------------------------------------------
1195 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1196 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1197 , Flag "with-rtsopts" (HasArg setRtsOpts)
1198 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1199 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1200 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1201 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1202 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1203 , Flag "main-is" (SepArg setMainIs)
1204 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1205 , Flag "haddock-opts" (hasArg addHaddockOpts)
1206 , Flag "hpcdir" (SepArg setOptHpcDir)
1208 ------- recompilation checker --------------------------------------
1209 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1210 ; deprecate "Use -fno-force-recomp instead" }))
1211 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1212 ; deprecate "Use -fforce-recomp instead" }))
1214 ------ HsCpp opts ---------------------------------------------------
1215 , Flag "D" (AnySuffix (upd . addOptP))
1216 , Flag "U" (AnySuffix (upd . addOptP))
1218 ------- Include/Import Paths ----------------------------------------
1219 , Flag "I" (Prefix addIncludePath)
1220 , Flag "i" (OptPrefix addImportPath)
1222 ------ Debugging ----------------------------------------------------
1223 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1225 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1226 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1227 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1228 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1229 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1230 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1231 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1232 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1233 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1234 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1235 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1236 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1237 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1238 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1239 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1240 ; setDumpFlag' Opt_D_dump_llvm}))
1241 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1242 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1243 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1244 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1245 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1246 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1247 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1248 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1249 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1250 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1251 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1252 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1253 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1254 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1255 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1256 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1257 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1258 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1259 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1260 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1261 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1262 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1263 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1264 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1265 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1266 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1267 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1268 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1269 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1270 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1271 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1272 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1273 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1274 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1275 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1276 ; setVerboseCore2Core }))
1277 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1278 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1279 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1280 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1281 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1282 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1283 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1284 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1285 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1286 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1287 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1288 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1289 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1290 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1291 , Flag "dshow-passes" (NoArg (do forceRecompile
1292 setVerbosity (Just 2)))
1293 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1295 ------ Machine dependant (-m<blah>) stuff ---------------------------
1297 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1298 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1299 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1300 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1302 ------ Warning opts -------------------------------------------------
1303 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1304 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1305 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1306 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1307 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1308 ; deprecate "Use -w instead" }))
1309 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1311 ------ Optimisation flags ------------------------------------------
1312 , Flag "O" (noArg (setOptLevel 1))
1313 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1314 , Flag "Odph" (noArg setDPHOpt)
1315 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1316 -- If the number is missing, use 1
1318 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1319 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1320 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1321 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1322 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1323 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1324 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1325 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1326 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1327 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1328 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1329 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1330 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1332 ------ Profiling ----------------------------------------------------
1334 -- XXX Should the -f* flags be deprecated?
1335 -- They don't seem to be documented
1336 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1337 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1338 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1339 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1340 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1341 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1342 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1343 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1344 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1346 ------ DPH flags ----------------------------------------------------
1348 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1349 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1350 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1351 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1353 ------ Compiler flags -----------------------------------------------
1355 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1356 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1357 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1358 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1359 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1360 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1362 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1363 setTarget HscNothing))
1364 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1365 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1366 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1367 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1369 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1370 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1371 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1372 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1373 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1374 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1375 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1377 package_flags :: [Flag (CmdLineP DynFlags)]
1379 ------- Packages ----------------------------------------------------
1380 Flag "package-conf" (HasArg extraPkgConf_)
1381 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1382 , Flag "package-name" (hasArg setPackageName)
1383 , Flag "package-id" (HasArg exposePackageId)
1384 , Flag "package" (HasArg exposePackage)
1385 , Flag "hide-package" (HasArg hidePackage)
1386 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1387 , Flag "ignore-package" (HasArg ignorePackage)
1388 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1389 ; deprecate "Use -package instead" }))
1392 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1393 -- False <=> we are turning the flag off
1394 turnOn :: TurnOnFlag; turnOn = True
1395 turnOff :: TurnOnFlag; turnOff = False
1398 = ( String -- Flag in string form
1399 , flag -- Flag in internal form
1400 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1401 -- Typically, emit a warning or error
1403 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1404 -> String -- ^ The flag prefix
1405 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1406 -> FlagSpec flag -- ^ Specification of this particular flag
1407 -> Flag (CmdLineP DynFlags)
1408 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1409 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1411 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1412 deprecatedForExtension lang turn_on
1413 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1415 flag | turn_on = lang
1416 | otherwise = "No"++lang
1418 useInstead :: String -> TurnOnFlag -> DynP ()
1419 useInstead flag turn_on
1420 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1422 no = if turn_on then "" else "no-"
1424 nop :: TurnOnFlag -> DynP ()
1427 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1428 fFlags :: [FlagSpec DynFlag]
1430 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1431 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1432 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1433 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1434 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1435 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1436 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1437 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1438 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1439 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1440 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1441 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1442 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1443 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1444 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1445 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1446 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1447 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1448 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1449 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1450 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1451 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1452 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1453 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1454 ( "warn-orphans", Opt_WarnOrphans, nop ),
1455 ( "warn-identities", Opt_WarnIdentities, nop ),
1456 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1457 ( "warn-tabs", Opt_WarnTabs, nop ),
1458 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1459 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1460 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1461 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1462 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1463 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1464 ( "strictness", Opt_Strictness, nop ),
1465 ( "specialise", Opt_Specialise, nop ),
1466 ( "float-in", Opt_FloatIn, nop ),
1467 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1468 ( "full-laziness", Opt_FullLaziness, nop ),
1469 ( "liberate-case", Opt_LiberateCase, nop ),
1470 ( "spec-constr", Opt_SpecConstr, nop ),
1471 ( "cse", Opt_CSE, nop ),
1472 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1473 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1474 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1475 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1476 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1477 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1478 ( "case-merge", Opt_CaseMerge, nop ),
1479 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1480 ( "method-sharing", Opt_MethodSharing,
1481 \_ -> deprecate "doesn't do anything any more"),
1482 -- Remove altogether in GHC 7.2
1483 ( "dicts-cheap", Opt_DictsCheap, nop ),
1484 ( "excess-precision", Opt_ExcessPrecision, nop ),
1485 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1486 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1487 ( "print-bind-result", Opt_PrintBindResult, nop ),
1488 ( "force-recomp", Opt_ForceRecomp, nop ),
1489 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1490 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1491 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1492 ( "break-on-exception", Opt_BreakOnException, nop ),
1493 ( "break-on-error", Opt_BreakOnError, nop ),
1494 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1495 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1496 ( "run-cps", Opt_RunCPS, nop ),
1497 ( "run-cpsz", Opt_RunCPSZ, nop ),
1498 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1499 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1500 ( "vectorise", Opt_Vectorise, nop ),
1501 ( "regs-graph", Opt_RegsGraph, nop ),
1502 ( "regs-iterative", Opt_RegsIterative, nop ),
1503 ( "gen-manifest", Opt_GenManifest, nop ),
1504 ( "embed-manifest", Opt_EmbedManifest, nop ),
1505 ( "ext-core", Opt_EmitExternalCore, nop ),
1506 ( "shared-implib", Opt_SharedImplib, nop ),
1507 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1508 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1509 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1510 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1513 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1514 fLangFlags :: [FlagSpec ExtensionFlag]
1516 ( "th", Opt_TemplateHaskell,
1517 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1518 ( "fi", Opt_ForeignFunctionInterface,
1519 deprecatedForExtension "ForeignFunctionInterface" ),
1520 ( "ffi", Opt_ForeignFunctionInterface,
1521 deprecatedForExtension "ForeignFunctionInterface" ),
1522 ( "arrows", Opt_Arrows,
1523 deprecatedForExtension "Arrows" ),
1524 ( "generics", Opt_Generics,
1525 deprecatedForExtension "Generics" ),
1526 ( "implicit-prelude", Opt_ImplicitPrelude,
1527 deprecatedForExtension "ImplicitPrelude" ),
1528 ( "bang-patterns", Opt_BangPatterns,
1529 deprecatedForExtension "BangPatterns" ),
1530 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1531 deprecatedForExtension "MonomorphismRestriction" ),
1532 ( "mono-pat-binds", Opt_MonoPatBinds,
1533 deprecatedForExtension "MonoPatBinds" ),
1534 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1535 deprecatedForExtension "ExtendedDefaultRules" ),
1536 ( "implicit-params", Opt_ImplicitParams,
1537 deprecatedForExtension "ImplicitParams" ),
1538 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1539 deprecatedForExtension "ScopedTypeVariables" ),
1540 ( "parr", Opt_ParallelArrays,
1541 deprecatedForExtension "ParallelArrays" ),
1542 ( "PArr", Opt_ParallelArrays,
1543 deprecatedForExtension "ParallelArrays" ),
1544 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1545 deprecatedForExtension "OverlappingInstances" ),
1546 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1547 deprecatedForExtension "UndecidableInstances" ),
1548 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1549 deprecatedForExtension "IncoherentInstances" )
1552 supportedLanguages :: [String]
1553 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1555 supportedExtensions :: [String]
1556 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1558 supportedLanguagesAndExtensions :: [String]
1559 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1561 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1562 languageFlags :: [FlagSpec Language]
1564 ( "Haskell98", Haskell98, nop ),
1565 ( "Haskell2010", Haskell2010, nop )
1568 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1569 xFlags :: [FlagSpec ExtensionFlag]
1571 ( "CPP", Opt_Cpp, nop ),
1572 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1573 ( "TupleSections", Opt_TupleSections, nop ),
1574 ( "PatternGuards", Opt_PatternGuards, nop ),
1575 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1576 ( "MagicHash", Opt_MagicHash, nop ),
1577 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1578 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1579 ( "KindSignatures", Opt_KindSignatures, nop ),
1580 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1581 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1582 ( "TransformListComp", Opt_TransformListComp, nop ),
1583 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1584 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1585 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1586 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1587 ( "Rank2Types", Opt_Rank2Types, nop ),
1588 ( "RankNTypes", Opt_RankNTypes, nop ),
1589 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1590 ( "TypeOperators", Opt_TypeOperators, nop ),
1591 ( "RecursiveDo", Opt_RecursiveDo,
1592 deprecatedForExtension "DoRec"),
1593 ( "DoRec", Opt_DoRec, nop ),
1594 ( "Arrows", Opt_Arrows, nop ),
1595 ( "ModalTypes", Opt_ModalTypes, nop ),
1596 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1597 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1598 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1599 ( "Generics", Opt_Generics, nop ),
1600 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1601 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1602 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1603 ( "RecordPuns", Opt_RecordPuns,
1604 deprecatedForExtension "NamedFieldPuns" ),
1605 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1606 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1607 ( "GADTs", Opt_GADTs, nop ),
1608 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1609 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1610 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1611 ( "BangPatterns", Opt_BangPatterns, nop ),
1612 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1613 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1614 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1615 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1616 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1617 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1618 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1619 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1620 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1621 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1622 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1623 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1624 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1625 \ turn_on -> if not turn_on
1626 then deprecate "You can't turn off RelaxedPolyRec any more"
1628 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1629 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1630 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1632 ( "PatternSignatures", Opt_ScopedTypeVariables,
1633 deprecatedForExtension "ScopedTypeVariables" ),
1635 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1636 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1637 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1638 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1639 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1640 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1641 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1642 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1643 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1644 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1645 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1646 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1647 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1648 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1649 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1650 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1651 ( "PackageImports", Opt_PackageImports, nop )
1654 defaultFlags :: [DynFlag]
1656 = [ Opt_AutoLinkPackages,
1657 Opt_ReadUserPackageConf,
1665 Opt_PrintBindContents,
1670 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1671 -- The default -O0 options
1675 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1677 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1678 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1679 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1680 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1681 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1682 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1683 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1685 , (Opt_ModalTypes, turnOn, Opt_RankNTypes)
1686 , (Opt_ModalTypes, turnOn, Opt_ExplicitForAll)
1687 , (Opt_ModalTypes, turnOn, Opt_RebindableSyntax)
1688 , (Opt_ModalTypes, turnOff, Opt_MonomorphismRestriction)
1690 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1692 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1693 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1694 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1696 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1697 -- all over the place
1699 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1701 -- Record wild-cards implies field disambiguation
1702 -- Otherwise if you write (C {..}) you may well get
1703 -- stuff like " 'a' not in scope ", which is a bit silly
1704 -- if the compiler has just filled in field 'a' of constructor 'C'
1705 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1707 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1710 optLevelFlags :: [([Int], DynFlag)]
1712 = [ ([0], Opt_IgnoreInterfacePragmas)
1713 , ([0], Opt_OmitInterfacePragmas)
1715 , ([1,2], Opt_IgnoreAsserts)
1716 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1718 , ([1,2], Opt_DoEtaReduction)
1719 , ([1,2], Opt_CaseMerge)
1720 , ([1,2], Opt_Strictness)
1722 , ([1,2], Opt_FullLaziness)
1723 , ([1,2], Opt_Specialise)
1724 , ([1,2], Opt_FloatIn)
1726 , ([2], Opt_LiberateCase)
1727 , ([2], Opt_SpecConstr)
1728 , ([2], Opt_RegsGraph)
1730 -- , ([2], Opt_StaticArgumentTransformation)
1731 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1732 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1733 -- several improvements to the heuristics, and I'm concerned that without
1734 -- those changes SAT will interfere with some attempts to write "high
1735 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1736 -- this year. In particular, the version in HEAD lacks the tail call
1737 -- criterion, so many things that look like reasonable loops will be
1738 -- turned into functions with extra (unneccesary) thunk creation.
1740 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1741 -- This one is important for a tiresome reason:
1742 -- we want to make sure that the bindings for data
1743 -- constructors are eta-expanded. This is probably
1744 -- a good thing anyway, but it seems fragile.
1747 -- -----------------------------------------------------------------------------
1748 -- Standard sets of warning options
1750 standardWarnings :: [DynFlag]
1752 = [ Opt_WarnWarningsDeprecations,
1753 Opt_WarnDeprecatedFlags,
1754 Opt_WarnUnrecognisedPragmas,
1755 Opt_WarnOverlappingPatterns,
1756 Opt_WarnMissingFields,
1757 Opt_WarnMissingMethods,
1758 Opt_WarnDuplicateExports,
1759 Opt_WarnLazyUnliftedBindings,
1760 Opt_WarnDodgyForeignImports,
1761 Opt_WarnWrongDoBind,
1762 Opt_WarnAlternativeLayoutRuleTransitional
1765 minusWOpts :: [DynFlag]
1766 -- Things you get with -W
1768 = standardWarnings ++
1769 [ Opt_WarnUnusedBinds,
1770 Opt_WarnUnusedMatches,
1771 Opt_WarnUnusedImports,
1772 Opt_WarnIncompletePatterns,
1773 Opt_WarnDodgyExports,
1774 Opt_WarnDodgyImports
1777 minusWallOpts :: [DynFlag]
1778 -- Things you get with -Wall
1781 [ Opt_WarnTypeDefaults,
1782 Opt_WarnNameShadowing,
1783 Opt_WarnMissingSigs,
1786 Opt_WarnUnusedDoBind
1789 minuswRemovesOpts :: [DynFlag]
1790 -- minuswRemovesOpts should be every warning option
1794 Opt_WarnIncompletePatternsRecUpd,
1795 Opt_WarnIncompleteUniPatterns,
1796 Opt_WarnMonomorphism,
1797 Opt_WarnUnrecognisedPragmas,
1798 Opt_WarnAutoOrphans,
1799 Opt_WarnImplicitPrelude
1802 enableGlasgowExts :: DynP ()
1803 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1804 mapM_ setExtensionFlag glasgowExtsFlags
1806 disableGlasgowExts :: DynP ()
1807 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1808 mapM_ unSetExtensionFlag glasgowExtsFlags
1810 glasgowExtsFlags :: [ExtensionFlag]
1811 glasgowExtsFlags = [
1812 Opt_ForeignFunctionInterface
1813 , Opt_UnliftedFFITypes
1814 , Opt_ImplicitParams
1815 , Opt_ScopedTypeVariables
1817 , Opt_TypeSynonymInstances
1818 , Opt_StandaloneDeriving
1819 , Opt_DeriveDataTypeable
1821 , Opt_DeriveFoldable
1822 , Opt_DeriveTraversable
1823 , Opt_FlexibleContexts
1824 , Opt_FlexibleInstances
1825 , Opt_ConstrainedClassMethods
1826 , Opt_MultiParamTypeClasses
1827 , Opt_FunctionalDependencies
1829 , Opt_PolymorphicComponents
1830 , Opt_ExistentialQuantification
1832 , Opt_PostfixOperators
1834 , Opt_LiberalTypeSynonyms
1838 , Opt_ParallelListComp
1839 , Opt_EmptyDataDecls
1840 , Opt_KindSignatures
1841 , Opt_GeneralizedNewtypeDeriving ]
1844 -- Consult the RTS to find whether GHC itself has been built profiled
1845 -- If so, you can't use Template Haskell
1846 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1848 rtsIsProfiled :: Bool
1849 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1851 checkTemplateHaskellOk :: Bool -> DynP ()
1852 checkTemplateHaskellOk turn_on
1853 | turn_on && rtsIsProfiled
1854 = addErr "You can't use Template Haskell with a profiled compiler"
1858 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1859 -- so we simply say "ok". It doesn't matter because TH isn't
1860 -- available in stage 1 anyway.
1861 checkTemplateHaskellOk turn_on = return ()
1864 {- **********************************************************************
1866 DynFlags constructors
1868 %********************************************************************* -}
1870 type DynP = EwM (CmdLineP DynFlags)
1872 upd :: (DynFlags -> DynFlags) -> DynP ()
1873 upd f = liftEwM (do { dfs <- getCmdLineState
1874 ; putCmdLineState $! (f dfs) })
1876 --------------- Constructor functions for OptKind -----------------
1877 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1878 noArg fn = NoArg (upd fn)
1880 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1881 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1883 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1884 hasArg fn = HasArg (upd . fn)
1886 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1887 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1888 ; deprecate deprec })
1890 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1891 intSuffix fn = IntSuffix (\n -> upd (fn n))
1893 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1894 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1896 --------------------------
1897 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1898 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1899 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1901 --------------------------
1902 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1903 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1906 deps = [ if turn_on then setExtensionFlag d
1907 else unSetExtensionFlag d
1908 | (f', turn_on, d) <- impliedFlags, f' == f ]
1909 -- When you set f, set the ones it implies
1910 -- NB: use setExtensionFlag recursively, in case the implied flags
1911 -- implies further flags
1913 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1914 -- When you un-set f, however, we don't un-set the things it implies
1915 -- (except for -fno-glasgow-exts, which is treated specially)
1917 --------------------------
1918 setDumpFlag' :: DynFlag -> DynP ()
1919 setDumpFlag' dump_flag
1920 = do { setDynFlag dump_flag
1921 ; when want_recomp forceRecompile }
1923 -- Certain dumpy-things are really interested in what's going
1924 -- on during recompilation checking, so in those cases we
1925 -- don't want to turn it off.
1926 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1927 Opt_D_dump_hi_diffs]
1929 forceRecompile :: DynP ()
1930 -- Whenver we -ddump, force recompilation (by switching off the
1931 -- recompilation checker), else you don't see the dump! However,
1932 -- don't switch it off in --make mode, else *everything* gets
1933 -- recompiled which probably isn't what you want
1934 forceRecompile = do { dfs <- liftEwM getCmdLineState
1935 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1937 force_recomp dfs = isOneShot (ghcMode dfs)
1939 setVerboseCore2Core :: DynP ()
1940 setVerboseCore2Core = do forceRecompile
1941 setDynFlag Opt_D_verbose_core2core
1942 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1945 setDumpSimplPhases :: String -> DynP ()
1946 setDumpSimplPhases s = do forceRecompile
1947 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1949 spec = case s of { ('=' : s') -> s'; _ -> s }
1951 setVerbosity :: Maybe Int -> DynP ()
1952 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1954 addCmdlineHCInclude :: String -> DynP ()
1955 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1957 extraPkgConf_ :: FilePath -> DynP ()
1958 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1960 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1962 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1964 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1966 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1968 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1970 setPackageName :: String -> DynFlags -> DynFlags
1971 setPackageName p s = s{ thisPackage = stringToPackageId p }
1973 -- If we're linking a binary, then only targets that produce object
1974 -- code are allowed (requests for other target types are ignored).
1975 setTarget :: HscTarget -> DynP ()
1976 setTarget l = upd set
1979 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1982 -- Changes the target only if we're compiling object code. This is
1983 -- used by -fasm and -fvia-C, which switch from one to the other, but
1984 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1985 -- can be safely used in an OPTIONS_GHC pragma.
1986 setObjTarget :: HscTarget -> DynP ()
1987 setObjTarget l = upd set
1990 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1993 setOptLevel :: Int -> DynFlags -> DynFlags
1994 setOptLevel n dflags
1995 | hscTarget dflags == HscInterpreted && n > 0
1997 -- not in IO any more, oh well:
1998 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2000 = updOptLevel n dflags
2003 -- -Odph is equivalent to
2005 -- -O2 optimise as much as possible
2006 -- -fmax-simplifier-iterations20 this is necessary sometimes
2007 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2009 setDPHOpt :: DynFlags -> DynFlags
2010 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2014 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2015 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2016 -- vectoriser cannot be used.
2018 data DPHBackend = DPHPar -- "dph-par"
2019 | DPHSeq -- "dph-seq"
2020 | DPHThis -- the currently compiled package
2021 | DPHNone -- no DPH library available
2022 deriving(Eq, Ord, Enum, Show)
2024 setDPHBackend :: DPHBackend -> DynP ()
2025 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2027 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2029 dphPackageMaybe :: DynFlags -> Maybe PackageId
2030 dphPackageMaybe dflags
2031 = case dphBackend dflags of
2032 DPHPar -> Just dphParPackageId
2033 DPHSeq -> Just dphSeqPackageId
2034 DPHThis -> Just (thisPackage dflags)
2037 setMainIs :: String -> DynP ()
2039 | not (null main_fn) && isLower (head main_fn)
2040 -- The arg looked like "Foo.Bar.baz"
2041 = upd $ \d -> d{ mainFunIs = Just main_fn,
2042 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2044 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2045 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2047 | otherwise -- The arg looked like "baz"
2048 = upd $ \d -> d{ mainFunIs = Just arg }
2050 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2052 -----------------------------------------------------------------------------
2053 -- Paths & Libraries
2055 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2057 -- -i on its own deletes the import paths
2058 addImportPath "" = upd (\s -> s{importPaths = []})
2059 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2063 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2066 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2068 addFrameworkPath p =
2069 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2071 #ifndef mingw32_TARGET_OS
2072 split_marker :: Char
2073 split_marker = ':' -- not configurable (ToDo)
2076 splitPathList :: String -> [String]
2077 splitPathList s = filter notNull (splitUp s)
2078 -- empty paths are ignored: there might be a trailing
2079 -- ':' in the initial list, for example. Empty paths can
2080 -- cause confusion when they are translated into -I options
2081 -- for passing to gcc.
2083 #ifndef mingw32_TARGET_OS
2084 splitUp xs = split split_marker xs
2086 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2088 -- That is, if "foo:bar:baz" is used, this interpreted as
2089 -- consisting of three entries, 'foo', 'bar', 'baz'.
2090 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2091 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2093 -- Notice that no attempt is made to fully replace the 'standard'
2094 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2095 -- that this will cause too much breakage for users & ':' will
2096 -- work fine even with DOS paths, if you're not insisting on being silly.
2099 splitUp (x:':':div:xs) | div `elem` dir_markers
2100 = ((x:':':div:p): splitUp rs)
2102 (p,rs) = findNextPath xs
2103 -- we used to check for existence of the path here, but that
2104 -- required the IO monad to be threaded through the command-line
2105 -- parser which is quite inconvenient. The
2106 splitUp xs = cons p (splitUp rs)
2108 (p,rs) = findNextPath xs
2113 -- will be called either when we've consumed nought or the
2114 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2115 -- finding the next split marker.
2117 case break (`elem` split_markers) xs of
2118 (p, _:ds) -> (p, ds)
2121 split_markers :: [Char]
2122 split_markers = [':', ';']
2124 dir_markers :: [Char]
2125 dir_markers = ['/', '\\']
2128 -- -----------------------------------------------------------------------------
2129 -- tmpDir, where we store temporary files.
2131 setTmpDir :: FilePath -> DynFlags -> DynFlags
2132 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2133 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2134 -- seem necessary now --SDM 7/2/2008
2136 -----------------------------------------------------------------------------
2139 setRtsOpts :: String -> DynP ()
2140 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2142 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2143 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2145 -----------------------------------------------------------------------------
2148 setOptHpcDir :: String -> DynP ()
2149 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2151 -----------------------------------------------------------------------------
2152 -- Via-C compilation stuff
2154 -- There are some options that we need to pass to gcc when compiling
2155 -- Haskell code via C, but are only supported by recent versions of
2156 -- gcc. The configure script decides which of these options we need,
2157 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2158 -- read before each via-C compilation. The advantage of having these
2159 -- in a separate file is that the file can be created at install-time
2160 -- depending on the available gcc version, and even re-generated later
2161 -- if gcc is upgraded.
2163 -- The options below are not dependent on the version of gcc, only the
2166 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2167 [String]) -- for registerised HC compilations
2168 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2169 in (cCcOpts ++ flagsAll, flagsRegHc)
2171 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2172 [String]) -- for registerised HC compilations
2173 machdepCCOpts' _dflags
2174 #if alpha_TARGET_ARCH
2176 #ifdef HAVE_THREADED_RTS_SUPPORT
2180 -- For now, to suppress the gcc warning "call-clobbered
2181 -- register used for global register variable", we simply
2182 -- disable all warnings altogether using the -w flag. Oh well.
2184 #elif hppa_TARGET_ARCH
2185 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2186 -- (very nice, but too bad the HP /usr/include files don't agree.)
2187 = ( ["-D_HPUX_SOURCE"], [] )
2189 #elif m68k_TARGET_ARCH
2190 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2191 -- popping of args to routines to be explicit; if we let things
2192 -- be deferred 'til after an STGJUMP, imminent death is certain!
2194 -- -fomit-frame-pointer : *don't*
2195 -- It's better to have a6 completely tied up being a frame pointer
2196 -- rather than let GCC pick random things to do with it.
2197 -- (If we want to steal a6, then we would try to do things
2198 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2199 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2201 #elif i386_TARGET_ARCH
2202 -- -fno-defer-pop : basically the same game as for m68k
2204 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2205 -- the fp (%ebp) for our register maps.
2206 = let n_regs = stolen_x86_regs _dflags
2209 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2212 "-fomit-frame-pointer",
2213 -- we want -fno-builtin, because when gcc inlines
2214 -- built-in functions like memcpy() it tends to
2215 -- run out of registers, requiring -monly-n-regs
2217 "-DSTOLEN_X86_REGS="++show n_regs ]
2220 #elif ia64_TARGET_ARCH
2221 = ( [], ["-fomit-frame-pointer", "-G0"] )
2223 #elif x86_64_TARGET_ARCH
2226 ["-fomit-frame-pointer",
2227 "-fno-asynchronous-unwind-tables",
2228 -- the unwind tables are unnecessary for HC code,
2229 -- and get in the way of -split-objs. Another option
2230 -- would be to throw them away in the mangler, but this
2233 -- calling builtins like strlen() using the FFI can
2234 -- cause gcc to run out of regs, so use the external
2238 #elif sparc_TARGET_ARCH
2240 -- For now, to suppress the gcc warning "call-clobbered
2241 -- register used for global register variable", we simply
2242 -- disable all warnings altogether using the -w flag. Oh well.
2244 #elif powerpc_apple_darwin_TARGET
2246 -- Disable Apple's precompiling preprocessor. It's a great thing
2247 -- for "normal" programs, but it doesn't support register variable
2249 = ( [], ["-no-cpp-precomp"] )
2254 picCCOpts :: DynFlags -> [String]
2256 #if darwin_TARGET_OS
2257 -- Apple prefers to do things the other way round.
2258 -- PIC is on by default.
2259 -- -mdynamic-no-pic:
2260 -- Turn off PIC code generation.
2262 -- Don't generate "common" symbols - these are unwanted
2263 -- in dynamic libraries.
2266 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2268 = ["-mdynamic-no-pic"]
2269 #elif mingw32_TARGET_OS
2270 -- no -fPIC for Windows
2272 = ["-U __PIC__","-D__PIC__"]
2276 -- we need -fPIC for C files when we are compiling with -dynamic,
2277 -- otherwise things like stub.c files don't get compiled
2278 -- correctly. They need to reference data in the Haskell
2279 -- objects, but can't without -fPIC. See
2280 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2281 | opt_PIC || not opt_Static
2282 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2287 -- -----------------------------------------------------------------------------
2291 can_split = cSupportsSplitObjs == "YES"
2293 -- -----------------------------------------------------------------------------
2296 data Printable = String String
2297 | FromDynFlags (DynFlags -> String)
2299 compilerInfo :: [(String, Printable)]
2300 compilerInfo = [("Project name", String cProjectName),
2301 ("Project version", String cProjectVersion),
2302 ("Booter version", String cBooterVersion),
2303 ("Stage", String cStage),
2304 ("Build platform", String cBuildPlatformString),
2305 ("Host platform", String cHostPlatformString),
2306 ("Target platform", String cTargetPlatformString),
2307 ("Have interpreter", String cGhcWithInterpreter),
2308 ("Object splitting supported", String cSupportsSplitObjs),
2309 ("Have native code generator", String cGhcWithNativeCodeGen),
2310 ("Support SMP", String cGhcWithSMP),
2311 ("Unregisterised", String cGhcUnregisterised),
2312 ("Tables next to code", String cGhcEnableTablesNextToCode),
2313 ("RTS ways", String cGhcRTSWays),
2314 ("Leading underscore", String cLeadingUnderscore),
2315 ("Debug on", String (show debugIsOn)),
2316 ("LibDir", FromDynFlags topDir),
2317 ("Global Package DB", FromDynFlags systemPackageConfig),
2318 ("C compiler flags", String (show cCcOpts)),
2319 ("Gcc Linker flags", String (show cGccLinkerOpts)),
2320 ("Ld Linker flags", String (show cLdLinkerOpts))