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
118 | Opt_D_dump_cmmz_pretty
122 | Opt_D_dump_asm_native
123 | Opt_D_dump_asm_liveness
124 | Opt_D_dump_asm_coalesce
125 | Opt_D_dump_asm_regalloc
126 | Opt_D_dump_asm_regalloc_stages
127 | Opt_D_dump_asm_conflicts
128 | Opt_D_dump_asm_stats
129 | Opt_D_dump_asm_expanded
136 | Opt_D_dump_inlinings
137 | Opt_D_dump_rule_firings
138 | Opt_D_dump_rule_rewrites
139 | Opt_D_dump_occur_anal
143 | Opt_D_dump_simpl_iterations
144 | Opt_D_dump_simpl_phases
153 | Opt_D_dump_worker_wrapper
154 | Opt_D_dump_rn_trace
155 | Opt_D_dump_rn_stats
157 | Opt_D_dump_simpl_stats
158 | Opt_D_dump_cs_trace -- Constraint solver in type checker
159 | Opt_D_dump_tc_trace
160 | Opt_D_dump_if_trace
161 | Opt_D_dump_vt_trace
168 | Opt_D_verbose_core2core
169 | Opt_D_verbose_stg2stg
171 | Opt_D_dump_hi_diffs
172 | Opt_D_dump_minimal_imports
173 | Opt_D_dump_mod_cycles
174 | Opt_D_dump_view_pattern_commoning
175 | Opt_D_faststring_stats
176 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
177 | Opt_D_no_debug_output
183 | Opt_WarnIsError -- -Werror; makes warnings fatal
184 | Opt_WarnDuplicateExports
186 | Opt_WarnImplicitPrelude
187 | Opt_WarnIncompletePatterns
188 | Opt_WarnIncompleteUniPatterns
189 | Opt_WarnIncompletePatternsRecUpd
190 | Opt_WarnMissingFields
191 | Opt_WarnMissingImportList
192 | Opt_WarnMissingMethods
193 | Opt_WarnMissingSigs
194 | Opt_WarnMissingLocalSigs
195 | Opt_WarnNameShadowing
196 | Opt_WarnOverlappingPatterns
197 | Opt_WarnTypeDefaults
198 | Opt_WarnMonomorphism
199 | Opt_WarnUnusedBinds
200 | Opt_WarnUnusedImports
201 | Opt_WarnUnusedMatches
202 | Opt_WarnWarningsDeprecations
203 | Opt_WarnDeprecatedFlags
204 | Opt_WarnDodgyExports
205 | Opt_WarnDodgyImports
207 | Opt_WarnAutoOrphans
210 | Opt_WarnUnrecognisedPragmas
211 | Opt_WarnDodgyForeignImports
212 | Opt_WarnLazyUnliftedBindings
213 | Opt_WarnUnusedDoBind
214 | Opt_WarnWrongDoBind
215 | Opt_WarnAlternativeLayoutRuleTransitional
217 | Opt_PrintExplicitForalls
224 | Opt_StaticArgumentTransformation
228 | Opt_DoLambdaEtaExpansion
232 | Opt_UnboxStrictFields
233 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
235 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
237 | Opt_RegsGraph -- do graph coloring register allocation
238 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
241 | Opt_IgnoreInterfacePragmas
242 | Opt_OmitInterfacePragmas
243 | Opt_ExposeAllUnfoldings
246 | Opt_AutoSccsOnAllToplevs
247 | Opt_AutoSccsOnExportedToplevs
248 | Opt_AutoSccsOnIndividualCafs
255 | Opt_ExcessPrecision
256 | Opt_EagerBlackHoling
257 | Opt_ReadUserPackageConf
261 | Opt_HideAllPackages
262 | Opt_PrintBindResult
266 | Opt_BreakOnException
268 | Opt_PrintEvldWithShow
269 | Opt_PrintBindContents
272 | Opt_EmitExternalCore
274 | Opt_BuildingCabalPackage
282 | Opt_ConvertToZipCfgAndBack
283 | Opt_AutoLinkPackages
284 | Opt_ImplicitImportQualified
293 | Opt_KeepRawTokenStream
298 data Language = Haskell98 | Haskell2010
302 | Opt_OverlappingInstances
303 | Opt_UndecidableInstances
304 | Opt_IncoherentInstances
305 | Opt_MonomorphismRestriction
308 | Opt_RelaxedPolyRec -- Deprecated
309 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
310 | Opt_ForeignFunctionInterface
311 | Opt_UnliftedFFITypes
312 | Opt_GHCForeignImportPrim
313 | Opt_ParallelArrays -- Syntactic support for parallel arrays
314 | Opt_Arrows -- Arrow-notation syntax
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 via C (i.e. unregisterised
899 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
900 setDylibInstallName f d = d{ dylibInstallName = Just f}
902 setObjectSuf f d = d{ objectSuf = f}
903 setHiSuf f d = d{ hiSuf = f}
904 setHcSuf f d = d{ hcSuf = f}
906 setOutputFile f d = d{ outputFile = f}
907 setOutputHi f d = d{ outputHi = f}
909 parseDynLibLoaderMode f d =
911 ("deploy", "") -> d{ dynLibLoader = Deployable }
912 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
913 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
915 setDumpPrefixForce f d = d { dumpPrefixForce = f}
917 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
918 -- Config.hs should really use Option.
919 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
920 addOptl f d = d{ opt_l = f : opt_l d}
921 addOptP f d = d{ opt_P = f : opt_P d}
924 setDepMakefile :: FilePath -> DynFlags -> DynFlags
925 setDepMakefile f d = d { depMakefile = deOptDep f }
927 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
928 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
930 addDepExcludeMod :: String -> DynFlags -> DynFlags
932 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
934 addDepSuffix :: FilePath -> DynFlags -> DynFlags
935 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
938 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
939 -- we need to strip the "-optdep" off of the arg
940 deOptDep :: String -> String
941 deOptDep x = case stripPrefix "-optdep" x of
945 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
947 addHaddockOpts f d = d{ haddockOptions = Just f}
949 -- -----------------------------------------------------------------------------
950 -- Command-line options
952 -- | When invoking external tools as part of the compilation pipeline, we
953 -- pass these a sequence of options on the command-line. Rather than
954 -- just using a list of Strings, we use a type that allows us to distinguish
955 -- between filepaths and 'other stuff'. The reason for this is that
956 -- this type gives us a handle on transforming filenames, and filenames only,
957 -- to whatever format they're expected to be on a particular platform.
959 = FileOption -- an entry that _contains_ filename(s) / filepaths.
960 String -- a non-filepath prefix that shouldn't be
961 -- transformed (e.g., "/out=")
962 String -- the filepath/filename portion
965 showOpt :: Option -> String
966 showOpt (FileOption pre f) = pre ++ f
967 showOpt (Option s) = s
969 -----------------------------------------------------------------------------
970 -- Setting the optimisation level
972 updOptLevel :: Int -> DynFlags -> DynFlags
973 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
975 = dfs2{ optLevel = final_n }
977 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
978 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
979 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
981 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
982 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
984 -- -----------------------------------------------------------------------------
985 -- StgToDo: abstraction of stg-to-stg passes to run.
988 = StgDoMassageForProfiling -- should be (next to) last
989 -- There's also setStgVarInfo, but its absolute "lastness"
990 -- is so critical that it is hardwired in (no flag).
993 getStgToDo :: DynFlags -> [StgToDo]
997 stg_stats = dopt Opt_StgStats dflags
999 todo1 = if stg_stats then [D_stg_stats] else []
1001 todo2 | WayProf `elem` wayNames dflags
1002 = StgDoMassageForProfiling : todo1
1006 {- **********************************************************************
1010 %********************************************************************* -}
1012 -- -----------------------------------------------------------------------------
1013 -- Parsing the dynamic flags.
1015 -- | Parse dynamic flags from a list of command line arguments. Returns the
1016 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1017 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1018 -- flags or missing arguments).
1019 parseDynamicFlags :: Monad m =>
1020 DynFlags -> [Located String]
1021 -> m (DynFlags, [Located String], [Located String])
1022 -- ^ Updated 'DynFlags', left-over arguments, and
1023 -- list of warnings.
1024 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1026 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1027 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1028 parseDynamicNoPackageFlags :: Monad m =>
1029 DynFlags -> [Located String]
1030 -> m (DynFlags, [Located String], [Located String])
1031 -- ^ Updated 'DynFlags', left-over arguments, and
1032 -- list of warnings.
1033 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1035 parseDynamicFlags_ :: Monad m =>
1036 DynFlags -> [Located String] -> Bool
1037 -> m (DynFlags, [Located String], [Located String])
1038 parseDynamicFlags_ dflags0 args pkg_flags = do
1039 -- XXX Legacy support code
1040 -- We used to accept things like
1041 -- optdep-f -optdepdepend
1042 -- optdep-f -optdep depend
1043 -- optdep -f -optdepdepend
1044 -- optdep -f -optdep depend
1045 -- but the spaces trip up proper argument handling. So get rid of them.
1046 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1047 f (x : xs) = x : f xs
1051 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1052 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1053 | otherwise = dynamic_flags
1055 let ((leftover, errs, warns), dflags1)
1056 = runCmdLine (processArgs flag_spec args') dflags0
1057 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1059 let (pic_warns, dflags2)
1060 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1061 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1062 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1063 ++ "dynamic on this platform;\n ignoring -fllvm"],
1064 dflags1{ hscTarget = HscAsm })
1066 | otherwise = ([], dflags1)
1068 return (dflags2, leftover, pic_warns ++ warns)
1071 {- **********************************************************************
1073 DynFlags specifications
1075 %********************************************************************* -}
1077 allFlags :: [String]
1078 allFlags = map ('-':) $
1079 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1080 map ("fno-"++) flags ++
1081 map ("f"++) flags ++
1082 map ("f"++) flags' ++
1083 map ("X"++) supportedExtensions
1084 where ok (PrefixPred _ _) = False
1086 flags = [ name | (name, _, _) <- fFlags ]
1087 flags' = [ name | (name, _, _) <- fLangFlags ]
1089 --------------- The main flags themselves ------------------
1090 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1092 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1093 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1094 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1096 (HasArg (\s -> do { addCmdlineHCInclude s
1097 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1098 , Flag "v" (OptIntSuffix setVerbosity)
1100 ------- Specific phases --------------------------------------------
1101 -- need to appear before -pgmL to be parsed as LLVM flags.
1102 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1103 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1104 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1105 , Flag "pgmP" (hasArg setPgmP)
1106 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1107 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1108 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1109 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1110 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1111 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1112 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1113 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1115 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1116 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1117 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1118 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1119 , Flag "optP" (hasArg addOptP)
1120 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1121 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1122 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1123 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1124 , Flag "optl" (hasArg addOptl)
1125 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1128 (NoArg (if can_split
1129 then setDynFlag Opt_SplitObjs
1130 else addWarn "ignoring -fsplit-objs"))
1132 -------- ghc -M -----------------------------------------------------
1133 , Flag "dep-suffix" (hasArg addDepSuffix)
1134 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1135 , Flag "dep-makefile" (hasArg setDepMakefile)
1136 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1137 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1138 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1139 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1140 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1141 , Flag "exclude-module" (hasArg addDepExcludeMod)
1142 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1143 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1145 -------- Linking ----------------------------------------------------
1146 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1147 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1148 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1149 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1151 ------- Libraries ---------------------------------------------------
1152 , Flag "L" (Prefix addLibraryPath)
1153 , Flag "l" (AnySuffix (upd . addOptl))
1155 ------- Frameworks --------------------------------------------------
1156 -- -framework-path should really be -F ...
1157 , Flag "framework-path" (HasArg addFrameworkPath)
1158 , Flag "framework" (hasArg addCmdlineFramework)
1160 ------- Output Redirection ------------------------------------------
1161 , Flag "odir" (hasArg setObjectDir)
1162 , Flag "o" (SepArg (upd . setOutputFile . Just))
1163 , Flag "ohi" (hasArg (setOutputHi . Just ))
1164 , Flag "osuf" (hasArg setObjectSuf)
1165 , Flag "hcsuf" (hasArg setHcSuf)
1166 , Flag "hisuf" (hasArg setHiSuf)
1167 , Flag "hidir" (hasArg setHiDir)
1168 , Flag "tmpdir" (hasArg setTmpDir)
1169 , Flag "stubdir" (hasArg setStubDir)
1170 , Flag "outputdir" (hasArg setOutputDir)
1171 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1173 ------- Keeping temporary files -------------------------------------
1174 -- These can be singular (think ghc -c) or plural (think ghc --make)
1175 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1176 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1177 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1178 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1179 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1180 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1181 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1182 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1183 -- This only makes sense as plural
1184 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1186 ------- Miscellaneous ----------------------------------------------
1187 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1188 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1189 , Flag "with-rtsopts" (HasArg setRtsOpts)
1190 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1191 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1192 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1193 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1194 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1195 , Flag "main-is" (SepArg setMainIs)
1196 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1197 , Flag "haddock-opts" (hasArg addHaddockOpts)
1198 , Flag "hpcdir" (SepArg setOptHpcDir)
1200 ------- recompilation checker --------------------------------------
1201 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1202 ; deprecate "Use -fno-force-recomp instead" }))
1203 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1204 ; deprecate "Use -fforce-recomp instead" }))
1206 ------ HsCpp opts ---------------------------------------------------
1207 , Flag "D" (AnySuffix (upd . addOptP))
1208 , Flag "U" (AnySuffix (upd . addOptP))
1210 ------- Include/Import Paths ----------------------------------------
1211 , Flag "I" (Prefix addIncludePath)
1212 , Flag "i" (OptPrefix addImportPath)
1214 ------ Debugging ----------------------------------------------------
1215 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1217 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1218 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1219 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1220 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1221 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1222 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1223 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1224 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1225 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1226 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1227 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1228 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1229 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1230 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1231 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1232 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1233 ; setDumpFlag' Opt_D_dump_llvm}))
1234 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1235 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1236 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1237 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1238 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1239 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1240 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1241 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1242 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1243 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1244 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1245 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1246 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1247 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1248 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1249 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1250 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1251 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1252 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1253 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1254 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1255 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1256 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1257 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1258 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1259 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1260 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1261 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1262 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1263 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1264 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1265 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1266 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1267 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1268 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1269 ; setVerboseCore2Core }))
1270 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1271 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1272 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1273 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1274 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1275 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1276 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1277 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1278 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1279 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1280 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1281 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1282 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1283 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1284 , Flag "dshow-passes" (NoArg (do forceRecompile
1285 setVerbosity (Just 2)))
1286 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1288 ------ Machine dependant (-m<blah>) stuff ---------------------------
1290 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1291 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1292 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1293 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1295 ------ Warning opts -------------------------------------------------
1296 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1297 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1298 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1299 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1300 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1301 ; deprecate "Use -w instead" }))
1302 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1304 ------ Optimisation flags ------------------------------------------
1305 , Flag "O" (noArg (setOptLevel 1))
1306 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1307 , Flag "Odph" (noArg setDPHOpt)
1308 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1309 -- If the number is missing, use 1
1311 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1312 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1313 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1314 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1315 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1316 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1317 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1318 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1319 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1320 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1321 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1322 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1323 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1325 ------ Profiling ----------------------------------------------------
1327 -- XXX Should the -f* flags be deprecated?
1328 -- They don't seem to be documented
1329 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1330 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1331 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1332 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1333 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1334 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1335 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1336 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1337 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1339 ------ DPH flags ----------------------------------------------------
1341 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1342 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1343 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1344 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1346 ------ Compiler flags -----------------------------------------------
1348 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1349 , Flag "fvia-c" (NoArg
1350 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1351 , Flag "fvia-C" (NoArg
1352 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1353 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1355 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1356 setTarget HscNothing))
1357 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1358 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1359 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1360 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1362 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1363 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1364 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1365 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1366 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1367 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1368 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1370 package_flags :: [Flag (CmdLineP DynFlags)]
1372 ------- Packages ----------------------------------------------------
1373 Flag "package-conf" (HasArg extraPkgConf_)
1374 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1375 , Flag "package-name" (hasArg setPackageName)
1376 , Flag "package-id" (HasArg exposePackageId)
1377 , Flag "package" (HasArg exposePackage)
1378 , Flag "hide-package" (HasArg hidePackage)
1379 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1380 , Flag "ignore-package" (HasArg ignorePackage)
1381 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1382 ; deprecate "Use -package instead" }))
1385 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1386 -- False <=> we are turning the flag off
1387 turnOn :: TurnOnFlag; turnOn = True
1388 turnOff :: TurnOnFlag; turnOff = False
1391 = ( String -- Flag in string form
1392 , flag -- Flag in internal form
1393 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1394 -- Typically, emit a warning or error
1396 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1397 -> String -- ^ The flag prefix
1398 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1399 -> FlagSpec flag -- ^ Specification of this particular flag
1400 -> Flag (CmdLineP DynFlags)
1401 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1402 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1404 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1405 deprecatedForExtension lang turn_on
1406 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1408 flag | turn_on = lang
1409 | otherwise = "No"++lang
1411 useInstead :: String -> TurnOnFlag -> DynP ()
1412 useInstead flag turn_on
1413 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1415 no = if turn_on then "" else "no-"
1417 nop :: TurnOnFlag -> DynP ()
1420 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1421 fFlags :: [FlagSpec DynFlag]
1423 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1424 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1425 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1426 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1427 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1428 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1429 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1430 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1431 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1432 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1433 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1434 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1435 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1436 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1437 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1438 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1439 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1440 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1441 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1442 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1443 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1444 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1445 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1446 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1447 ( "warn-orphans", Opt_WarnOrphans, nop ),
1448 ( "warn-identities", Opt_WarnIdentities, nop ),
1449 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1450 ( "warn-tabs", Opt_WarnTabs, nop ),
1451 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1452 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1453 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1454 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1455 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1456 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1457 ( "strictness", Opt_Strictness, nop ),
1458 ( "specialise", Opt_Specialise, nop ),
1459 ( "float-in", Opt_FloatIn, nop ),
1460 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1461 ( "full-laziness", Opt_FullLaziness, nop ),
1462 ( "liberate-case", Opt_LiberateCase, nop ),
1463 ( "spec-constr", Opt_SpecConstr, nop ),
1464 ( "cse", Opt_CSE, nop ),
1465 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1466 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1467 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1468 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1469 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1470 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1471 ( "case-merge", Opt_CaseMerge, nop ),
1472 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1473 ( "method-sharing", Opt_MethodSharing,
1474 \_ -> deprecate "doesn't do anything any more"),
1475 -- Remove altogether in GHC 7.2
1476 ( "dicts-cheap", Opt_DictsCheap, nop ),
1477 ( "excess-precision", Opt_ExcessPrecision, nop ),
1478 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1479 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1480 ( "print-bind-result", Opt_PrintBindResult, nop ),
1481 ( "force-recomp", Opt_ForceRecomp, nop ),
1482 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1483 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1484 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1485 ( "break-on-exception", Opt_BreakOnException, nop ),
1486 ( "break-on-error", Opt_BreakOnError, nop ),
1487 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1488 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1489 ( "run-cps", Opt_RunCPS, nop ),
1490 ( "run-cpsz", Opt_RunCPSZ, nop ),
1491 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1492 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1493 ( "vectorise", Opt_Vectorise, nop ),
1494 ( "regs-graph", Opt_RegsGraph, nop ),
1495 ( "regs-iterative", Opt_RegsIterative, nop ),
1496 ( "gen-manifest", Opt_GenManifest, nop ),
1497 ( "embed-manifest", Opt_EmbedManifest, nop ),
1498 ( "ext-core", Opt_EmitExternalCore, nop ),
1499 ( "shared-implib", Opt_SharedImplib, nop ),
1500 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1501 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1502 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1503 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1506 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1507 fLangFlags :: [FlagSpec ExtensionFlag]
1509 ( "th", Opt_TemplateHaskell,
1510 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1511 ( "fi", Opt_ForeignFunctionInterface,
1512 deprecatedForExtension "ForeignFunctionInterface" ),
1513 ( "ffi", Opt_ForeignFunctionInterface,
1514 deprecatedForExtension "ForeignFunctionInterface" ),
1515 ( "arrows", Opt_Arrows,
1516 deprecatedForExtension "Arrows" ),
1517 ( "generics", Opt_Generics,
1518 deprecatedForExtension "Generics" ),
1519 ( "implicit-prelude", Opt_ImplicitPrelude,
1520 deprecatedForExtension "ImplicitPrelude" ),
1521 ( "bang-patterns", Opt_BangPatterns,
1522 deprecatedForExtension "BangPatterns" ),
1523 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1524 deprecatedForExtension "MonomorphismRestriction" ),
1525 ( "mono-pat-binds", Opt_MonoPatBinds,
1526 deprecatedForExtension "MonoPatBinds" ),
1527 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1528 deprecatedForExtension "ExtendedDefaultRules" ),
1529 ( "implicit-params", Opt_ImplicitParams,
1530 deprecatedForExtension "ImplicitParams" ),
1531 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1532 deprecatedForExtension "ScopedTypeVariables" ),
1533 ( "parr", Opt_ParallelArrays,
1534 deprecatedForExtension "ParallelArrays" ),
1535 ( "PArr", Opt_ParallelArrays,
1536 deprecatedForExtension "ParallelArrays" ),
1537 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1538 deprecatedForExtension "OverlappingInstances" ),
1539 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1540 deprecatedForExtension "UndecidableInstances" ),
1541 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1542 deprecatedForExtension "IncoherentInstances" )
1545 supportedLanguages :: [String]
1546 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1548 supportedExtensions :: [String]
1549 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1551 supportedLanguagesAndExtensions :: [String]
1552 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1554 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1555 languageFlags :: [FlagSpec Language]
1557 ( "Haskell98", Haskell98, nop ),
1558 ( "Haskell2010", Haskell2010, nop )
1561 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1562 xFlags :: [FlagSpec ExtensionFlag]
1564 ( "CPP", Opt_Cpp, nop ),
1565 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1566 ( "TupleSections", Opt_TupleSections, nop ),
1567 ( "PatternGuards", Opt_PatternGuards, nop ),
1568 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1569 ( "MagicHash", Opt_MagicHash, nop ),
1570 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1571 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1572 ( "KindSignatures", Opt_KindSignatures, nop ),
1573 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1574 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1575 ( "TransformListComp", Opt_TransformListComp, nop ),
1576 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1577 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1578 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1579 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1580 ( "Rank2Types", Opt_Rank2Types, nop ),
1581 ( "RankNTypes", Opt_RankNTypes, nop ),
1582 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1583 ( "TypeOperators", Opt_TypeOperators, nop ),
1584 ( "RecursiveDo", Opt_RecursiveDo,
1585 deprecatedForExtension "DoRec"),
1586 ( "DoRec", Opt_DoRec, nop ),
1587 ( "Arrows", Opt_Arrows, nop ),
1588 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1589 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1590 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1591 ( "Generics", Opt_Generics, nop ),
1592 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1593 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1594 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1595 ( "RecordPuns", Opt_RecordPuns,
1596 deprecatedForExtension "NamedFieldPuns" ),
1597 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1598 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1599 ( "GADTs", Opt_GADTs, nop ),
1600 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1601 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1602 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1603 ( "BangPatterns", Opt_BangPatterns, nop ),
1604 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1605 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1606 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1607 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1608 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1609 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1610 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1611 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1612 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1613 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1614 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1615 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1616 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1617 \ turn_on -> if not turn_on
1618 then deprecate "You can't turn off RelaxedPolyRec any more"
1620 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1621 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1622 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1624 ( "PatternSignatures", Opt_ScopedTypeVariables,
1625 deprecatedForExtension "ScopedTypeVariables" ),
1627 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1628 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1629 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1630 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1631 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1632 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1633 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1634 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1635 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1636 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1637 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1638 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1639 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1640 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1641 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1642 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1643 ( "PackageImports", Opt_PackageImports, nop )
1646 defaultFlags :: [DynFlag]
1648 = [ Opt_AutoLinkPackages,
1649 Opt_ReadUserPackageConf,
1657 Opt_PrintBindContents,
1662 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1663 -- The default -O0 options
1667 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1669 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1670 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1671 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1672 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1673 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1674 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1675 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1676 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1678 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1680 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1681 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1682 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1684 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1685 -- all over the place
1687 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1689 -- Record wild-cards implies field disambiguation
1690 -- Otherwise if you write (C {..}) you may well get
1691 -- stuff like " 'a' not in scope ", which is a bit silly
1692 -- if the compiler has just filled in field 'a' of constructor 'C'
1693 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1695 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1698 optLevelFlags :: [([Int], DynFlag)]
1700 = [ ([0], Opt_IgnoreInterfacePragmas)
1701 , ([0], Opt_OmitInterfacePragmas)
1703 , ([1,2], Opt_IgnoreAsserts)
1704 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1706 , ([1,2], Opt_DoEtaReduction)
1707 , ([1,2], Opt_CaseMerge)
1708 , ([1,2], Opt_Strictness)
1710 , ([1,2], Opt_FullLaziness)
1711 , ([1,2], Opt_Specialise)
1712 , ([1,2], Opt_FloatIn)
1714 , ([2], Opt_LiberateCase)
1715 , ([2], Opt_SpecConstr)
1716 , ([2], Opt_RegsGraph)
1718 -- , ([2], Opt_StaticArgumentTransformation)
1719 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1720 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1721 -- several improvements to the heuristics, and I'm concerned that without
1722 -- those changes SAT will interfere with some attempts to write "high
1723 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1724 -- this year. In particular, the version in HEAD lacks the tail call
1725 -- criterion, so many things that look like reasonable loops will be
1726 -- turned into functions with extra (unneccesary) thunk creation.
1728 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1729 -- This one is important for a tiresome reason:
1730 -- we want to make sure that the bindings for data
1731 -- constructors are eta-expanded. This is probably
1732 -- a good thing anyway, but it seems fragile.
1735 -- -----------------------------------------------------------------------------
1736 -- Standard sets of warning options
1738 standardWarnings :: [DynFlag]
1740 = [ Opt_WarnWarningsDeprecations,
1741 Opt_WarnDeprecatedFlags,
1742 Opt_WarnUnrecognisedPragmas,
1743 Opt_WarnOverlappingPatterns,
1744 Opt_WarnMissingFields,
1745 Opt_WarnMissingMethods,
1746 Opt_WarnDuplicateExports,
1747 Opt_WarnLazyUnliftedBindings,
1748 Opt_WarnDodgyForeignImports,
1749 Opt_WarnWrongDoBind,
1750 Opt_WarnAlternativeLayoutRuleTransitional
1753 minusWOpts :: [DynFlag]
1754 -- Things you get with -W
1756 = standardWarnings ++
1757 [ Opt_WarnUnusedBinds,
1758 Opt_WarnUnusedMatches,
1759 Opt_WarnUnusedImports,
1760 Opt_WarnIncompletePatterns,
1761 Opt_WarnDodgyExports,
1762 Opt_WarnDodgyImports
1765 minusWallOpts :: [DynFlag]
1766 -- Things you get with -Wall
1769 [ Opt_WarnTypeDefaults,
1770 Opt_WarnNameShadowing,
1771 Opt_WarnMissingSigs,
1774 Opt_WarnUnusedDoBind
1777 minuswRemovesOpts :: [DynFlag]
1778 -- minuswRemovesOpts should be every warning option
1782 Opt_WarnIncompletePatternsRecUpd,
1783 Opt_WarnIncompleteUniPatterns,
1784 Opt_WarnMonomorphism,
1785 Opt_WarnUnrecognisedPragmas,
1786 Opt_WarnAutoOrphans,
1787 Opt_WarnImplicitPrelude
1790 enableGlasgowExts :: DynP ()
1791 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1792 mapM_ setExtensionFlag glasgowExtsFlags
1794 disableGlasgowExts :: DynP ()
1795 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1796 mapM_ unSetExtensionFlag glasgowExtsFlags
1798 glasgowExtsFlags :: [ExtensionFlag]
1799 glasgowExtsFlags = [
1800 Opt_ForeignFunctionInterface
1801 , Opt_UnliftedFFITypes
1802 , Opt_ImplicitParams
1803 , Opt_ScopedTypeVariables
1805 , Opt_TypeSynonymInstances
1806 , Opt_StandaloneDeriving
1807 , Opt_DeriveDataTypeable
1809 , Opt_DeriveFoldable
1810 , Opt_DeriveTraversable
1811 , Opt_FlexibleContexts
1812 , Opt_FlexibleInstances
1813 , Opt_ConstrainedClassMethods
1814 , Opt_MultiParamTypeClasses
1815 , Opt_FunctionalDependencies
1817 , Opt_PolymorphicComponents
1818 , Opt_ExistentialQuantification
1820 , Opt_PostfixOperators
1822 , Opt_LiberalTypeSynonyms
1826 , Opt_ParallelListComp
1827 , Opt_EmptyDataDecls
1828 , Opt_KindSignatures
1829 , Opt_GeneralizedNewtypeDeriving ]
1832 -- Consult the RTS to find whether GHC itself has been built profiled
1833 -- If so, you can't use Template Haskell
1834 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1836 rtsIsProfiled :: Bool
1837 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1839 checkTemplateHaskellOk :: Bool -> DynP ()
1840 checkTemplateHaskellOk turn_on
1841 | turn_on && rtsIsProfiled
1842 = addErr "You can't use Template Haskell with a profiled compiler"
1846 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1847 -- so we simply say "ok". It doesn't matter because TH isn't
1848 -- available in stage 1 anyway.
1849 checkTemplateHaskellOk turn_on = return ()
1852 {- **********************************************************************
1854 DynFlags constructors
1856 %********************************************************************* -}
1858 type DynP = EwM (CmdLineP DynFlags)
1860 upd :: (DynFlags -> DynFlags) -> DynP ()
1861 upd f = liftEwM (do { dfs <- getCmdLineState
1862 ; putCmdLineState $! (f dfs) })
1864 --------------- Constructor functions for OptKind -----------------
1865 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1866 noArg fn = NoArg (upd fn)
1868 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1869 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1871 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1872 hasArg fn = HasArg (upd . fn)
1874 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1875 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1876 ; deprecate deprec })
1878 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1879 intSuffix fn = IntSuffix (\n -> upd (fn n))
1881 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1882 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1884 --------------------------
1885 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1886 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1887 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1889 --------------------------
1890 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1891 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1894 deps = [ if turn_on then setExtensionFlag d
1895 else unSetExtensionFlag d
1896 | (f', turn_on, d) <- impliedFlags, f' == f ]
1897 -- When you set f, set the ones it implies
1898 -- NB: use setExtensionFlag recursively, in case the implied flags
1899 -- implies further flags
1901 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1902 -- When you un-set f, however, we don't un-set the things it implies
1903 -- (except for -fno-glasgow-exts, which is treated specially)
1905 --------------------------
1906 setDumpFlag' :: DynFlag -> DynP ()
1907 setDumpFlag' dump_flag
1908 = do { setDynFlag dump_flag
1909 ; when want_recomp forceRecompile }
1911 -- Certain dumpy-things are really interested in what's going
1912 -- on during recompilation checking, so in those cases we
1913 -- don't want to turn it off.
1914 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1915 Opt_D_dump_hi_diffs]
1917 forceRecompile :: DynP ()
1918 -- Whenver we -ddump, force recompilation (by switching off the
1919 -- recompilation checker), else you don't see the dump! However,
1920 -- don't switch it off in --make mode, else *everything* gets
1921 -- recompiled which probably isn't what you want
1922 forceRecompile = do { dfs <- liftEwM getCmdLineState
1923 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1925 force_recomp dfs = isOneShot (ghcMode dfs)
1927 setVerboseCore2Core :: DynP ()
1928 setVerboseCore2Core = do forceRecompile
1929 setDynFlag Opt_D_verbose_core2core
1930 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1933 setDumpSimplPhases :: String -> DynP ()
1934 setDumpSimplPhases s = do forceRecompile
1935 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1937 spec = case s of { ('=' : s') -> s'; _ -> s }
1939 setVerbosity :: Maybe Int -> DynP ()
1940 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1942 addCmdlineHCInclude :: String -> DynP ()
1943 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1945 extraPkgConf_ :: FilePath -> DynP ()
1946 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1948 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1950 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1952 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1954 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1956 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1958 setPackageName :: String -> DynFlags -> DynFlags
1959 setPackageName p s = s{ thisPackage = stringToPackageId p }
1961 -- If we're linking a binary, then only targets that produce object
1962 -- code are allowed (requests for other target types are ignored).
1963 setTarget :: HscTarget -> DynP ()
1964 setTarget l = upd set
1967 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1970 -- Changes the target only if we're compiling object code. This is
1971 -- used by -fasm and -fllvm, which switch from one to the other, but
1972 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
1973 -- can be safely used in an OPTIONS_GHC pragma.
1974 setObjTarget :: HscTarget -> DynP ()
1975 setObjTarget l = upd set
1978 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1981 setOptLevel :: Int -> DynFlags -> DynFlags
1982 setOptLevel n dflags
1983 | hscTarget dflags == HscInterpreted && n > 0
1985 -- not in IO any more, oh well:
1986 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1988 = updOptLevel n dflags
1991 -- -Odph is equivalent to
1993 -- -O2 optimise as much as possible
1994 -- -fmax-simplifier-iterations20 this is necessary sometimes
1995 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
1997 setDPHOpt :: DynFlags -> DynFlags
1998 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2002 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2003 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2004 -- vectoriser cannot be used.
2006 data DPHBackend = DPHPar -- "dph-par"
2007 | DPHSeq -- "dph-seq"
2008 | DPHThis -- the currently compiled package
2009 | DPHNone -- no DPH library available
2010 deriving(Eq, Ord, Enum, Show)
2012 setDPHBackend :: DPHBackend -> DynP ()
2013 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2015 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2017 dphPackageMaybe :: DynFlags -> Maybe PackageId
2018 dphPackageMaybe dflags
2019 = case dphBackend dflags of
2020 DPHPar -> Just dphParPackageId
2021 DPHSeq -> Just dphSeqPackageId
2022 DPHThis -> Just (thisPackage dflags)
2025 setMainIs :: String -> DynP ()
2027 | not (null main_fn) && isLower (head main_fn)
2028 -- The arg looked like "Foo.Bar.baz"
2029 = upd $ \d -> d{ mainFunIs = Just main_fn,
2030 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2032 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2033 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2035 | otherwise -- The arg looked like "baz"
2036 = upd $ \d -> d{ mainFunIs = Just arg }
2038 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2040 -----------------------------------------------------------------------------
2041 -- Paths & Libraries
2043 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2045 -- -i on its own deletes the import paths
2046 addImportPath "" = upd (\s -> s{importPaths = []})
2047 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2051 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2054 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2056 addFrameworkPath p =
2057 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2059 #ifndef mingw32_TARGET_OS
2060 split_marker :: Char
2061 split_marker = ':' -- not configurable (ToDo)
2064 splitPathList :: String -> [String]
2065 splitPathList s = filter notNull (splitUp s)
2066 -- empty paths are ignored: there might be a trailing
2067 -- ':' in the initial list, for example. Empty paths can
2068 -- cause confusion when they are translated into -I options
2069 -- for passing to gcc.
2071 #ifndef mingw32_TARGET_OS
2072 splitUp xs = split split_marker xs
2074 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2076 -- That is, if "foo:bar:baz" is used, this interpreted as
2077 -- consisting of three entries, 'foo', 'bar', 'baz'.
2078 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2079 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2081 -- Notice that no attempt is made to fully replace the 'standard'
2082 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2083 -- that this will cause too much breakage for users & ':' will
2084 -- work fine even with DOS paths, if you're not insisting on being silly.
2087 splitUp (x:':':div:xs) | div `elem` dir_markers
2088 = ((x:':':div:p): splitUp rs)
2090 (p,rs) = findNextPath xs
2091 -- we used to check for existence of the path here, but that
2092 -- required the IO monad to be threaded through the command-line
2093 -- parser which is quite inconvenient. The
2094 splitUp xs = cons p (splitUp rs)
2096 (p,rs) = findNextPath xs
2101 -- will be called either when we've consumed nought or the
2102 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2103 -- finding the next split marker.
2105 case break (`elem` split_markers) xs of
2106 (p, _:ds) -> (p, ds)
2109 split_markers :: [Char]
2110 split_markers = [':', ';']
2112 dir_markers :: [Char]
2113 dir_markers = ['/', '\\']
2116 -- -----------------------------------------------------------------------------
2117 -- tmpDir, where we store temporary files.
2119 setTmpDir :: FilePath -> DynFlags -> DynFlags
2120 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2121 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2122 -- seem necessary now --SDM 7/2/2008
2124 -----------------------------------------------------------------------------
2127 setRtsOpts :: String -> DynP ()
2128 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2130 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2131 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2133 -----------------------------------------------------------------------------
2136 setOptHpcDir :: String -> DynP ()
2137 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2139 -----------------------------------------------------------------------------
2140 -- Via-C compilation stuff
2142 -- There are some options that we need to pass to gcc when compiling
2143 -- Haskell code via C, but are only supported by recent versions of
2144 -- gcc. The configure script decides which of these options we need,
2145 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2146 -- read before each via-C compilation. The advantage of having these
2147 -- in a separate file is that the file can be created at install-time
2148 -- depending on the available gcc version, and even re-generated later
2149 -- if gcc is upgraded.
2151 -- The options below are not dependent on the version of gcc, only the
2154 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2155 [String]) -- for registerised HC compilations
2156 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2157 in (cCcOpts ++ flagsAll, flagsRegHc)
2159 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2160 [String]) -- for registerised HC compilations
2161 machdepCCOpts' _dflags
2162 #if alpha_TARGET_ARCH
2164 #ifdef HAVE_THREADED_RTS_SUPPORT
2168 -- For now, to suppress the gcc warning "call-clobbered
2169 -- register used for global register variable", we simply
2170 -- disable all warnings altogether using the -w flag. Oh well.
2172 #elif hppa_TARGET_ARCH
2173 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2174 -- (very nice, but too bad the HP /usr/include files don't agree.)
2175 = ( ["-D_HPUX_SOURCE"], [] )
2177 #elif m68k_TARGET_ARCH
2178 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2179 -- popping of args to routines to be explicit; if we let things
2180 -- be deferred 'til after an STGJUMP, imminent death is certain!
2182 -- -fomit-frame-pointer : *don't*
2183 -- It's better to have a6 completely tied up being a frame pointer
2184 -- rather than let GCC pick random things to do with it.
2185 -- (If we want to steal a6, then we would try to do things
2186 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2187 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2189 #elif i386_TARGET_ARCH
2190 -- -fno-defer-pop : basically the same game as for m68k
2192 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2193 -- the fp (%ebp) for our register maps.
2194 = let n_regs = stolen_x86_regs _dflags
2197 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2200 "-fomit-frame-pointer",
2201 -- we want -fno-builtin, because when gcc inlines
2202 -- built-in functions like memcpy() it tends to
2203 -- run out of registers, requiring -monly-n-regs
2205 "-DSTOLEN_X86_REGS="++show n_regs ]
2208 #elif ia64_TARGET_ARCH
2209 = ( [], ["-fomit-frame-pointer", "-G0"] )
2211 #elif x86_64_TARGET_ARCH
2214 ["-fomit-frame-pointer",
2215 "-fno-asynchronous-unwind-tables",
2216 -- the unwind tables are unnecessary for HC code,
2217 -- and get in the way of -split-objs. Another option
2218 -- would be to throw them away in the mangler, but this
2221 -- calling builtins like strlen() using the FFI can
2222 -- cause gcc to run out of regs, so use the external
2226 #elif sparc_TARGET_ARCH
2228 -- For now, to suppress the gcc warning "call-clobbered
2229 -- register used for global register variable", we simply
2230 -- disable all warnings altogether using the -w flag. Oh well.
2232 #elif powerpc_apple_darwin_TARGET
2234 -- Disable Apple's precompiling preprocessor. It's a great thing
2235 -- for "normal" programs, but it doesn't support register variable
2237 = ( [], ["-no-cpp-precomp"] )
2242 picCCOpts :: DynFlags -> [String]
2244 #if darwin_TARGET_OS
2245 -- Apple prefers to do things the other way round.
2246 -- PIC is on by default.
2247 -- -mdynamic-no-pic:
2248 -- Turn off PIC code generation.
2250 -- Don't generate "common" symbols - these are unwanted
2251 -- in dynamic libraries.
2254 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2256 = ["-mdynamic-no-pic"]
2257 #elif mingw32_TARGET_OS
2258 -- no -fPIC for Windows
2260 = ["-U __PIC__","-D__PIC__"]
2264 -- we need -fPIC for C files when we are compiling with -dynamic,
2265 -- otherwise things like stub.c files don't get compiled
2266 -- correctly. They need to reference data in the Haskell
2267 -- objects, but can't without -fPIC. See
2268 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2269 | opt_PIC || not opt_Static
2270 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2275 -- -----------------------------------------------------------------------------
2279 can_split = cSupportsSplitObjs == "YES"
2281 -- -----------------------------------------------------------------------------
2284 data Printable = String String
2285 | FromDynFlags (DynFlags -> String)
2287 compilerInfo :: [(String, Printable)]
2288 compilerInfo = [("Project name", String cProjectName),
2289 ("Project version", String cProjectVersion),
2290 ("Booter version", String cBooterVersion),
2291 ("Stage", String cStage),
2292 ("Build platform", String cBuildPlatformString),
2293 ("Host platform", String cHostPlatformString),
2294 ("Target platform", String cTargetPlatformString),
2295 ("Have interpreter", String cGhcWithInterpreter),
2296 ("Object splitting supported", String cSupportsSplitObjs),
2297 ("Have native code generator", String cGhcWithNativeCodeGen),
2298 ("Support SMP", String cGhcWithSMP),
2299 ("Unregisterised", String cGhcUnregisterised),
2300 ("Tables next to code", String cGhcEnableTablesNextToCode),
2301 ("RTS ways", String cGhcRTSWays),
2302 ("Leading underscore", String cLeadingUnderscore),
2303 ("Debug on", String (show debugIsOn)),
2304 ("LibDir", FromDynFlags topDir),
2305 ("Global Package DB", FromDynFlags systemPackageConfig),
2306 ("C compiler flags", String (show cCcOpts)),
2307 ("Gcc Linker flags", String (show cGccLinkerOpts)),
2308 ("Ld Linker flags", String (show cLdLinkerOpts))