5 -- (c) The University of Glasgow 2005
8 -- Most flags are dynamic flags, which means they can change from
9 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
10 -- multi-session GHC each session can be using different dynamic
11 -- flags. Dynamic flags can also be set at the prompt in GHCi.
13 -- * Dynamic flags and associated configuration types
25 HscTarget(..), isObjectTarget, defaultObjectTarget,
26 GhcMode(..), isOneShot,
27 GhcLink(..), isNoLink,
31 fFlags, fLangFlags, xFlags,
32 DPHBackend(..), dphPackageMaybe,
36 ghcUsagePath, ghciUsagePath, topDir, tmpDir, rawSettings,
37 extraGccViaCFlags, systemPackageConfig,
38 pgm_L, pgm_P, pgm_F, pgm_c, pgm_s, pgm_a, pgm_l, pgm_dll, pgm_T,
39 pgm_sysman, pgm_windres, pgm_lo, pgm_lc,
40 opt_L, opt_P, opt_F, opt_c, opt_m, opt_a, opt_l,
41 opt_windres, opt_lo, opt_lc,
44 -- ** Manipulating DynFlags
45 defaultDynFlags, -- Settings -> DynFlags
46 initDynFlags, -- DynFlags -> IO DynFlags
48 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
55 -- ** Parsing DynFlags
57 parseDynamicNoPackageFlags,
60 supportedLanguagesAndExtensions,
62 -- ** DynFlag C compiler options
65 -- * Configuration of the stg-to-stg passes
69 -- * Compiler configuration suitable for display to the user
72 -- Only in stage 2 can we be sure that the RTS
73 -- exposes the appropriate runtime boolean
78 #include "HsVersions.h"
83 import PrelNames ( mAIN )
85 import {-# SOURCE #-} Packages (PackageState)
86 import DriverPhases ( Phase(..), phaseInputExt )
89 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
92 import Maybes ( orElse )
97 import Foreign.C ( CInt )
99 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
102 import System.IO.Unsafe ( unsafePerformIO )
105 import Control.Monad ( when )
109 import Data.Map (Map)
110 import qualified Data.Map as Map
111 import Data.Set (Set)
112 import qualified Data.Set as Set
113 import System.FilePath
114 import System.IO ( stderr, hPutChar )
116 -- -----------------------------------------------------------------------------
119 -- | Enumerates the simple on-or-off dynamic flags
126 | Opt_D_dump_cmmz_pretty
127 -- All of the cmmz subflags (there are a lot!) Automatically
128 -- enabled if you run -ddump-cmmz
129 | Opt_D_dump_cmmz_cbe
130 | Opt_D_dump_cmmz_proc
131 | Opt_D_dump_cmmz_spills
132 | Opt_D_dump_cmmz_rewrite
133 | Opt_D_dump_cmmz_dead
134 | Opt_D_dump_cmmz_stub
136 | Opt_D_dump_cmmz_procmap
137 | Opt_D_dump_cmmz_split
138 | Opt_D_dump_cmmz_lower
139 | Opt_D_dump_cmmz_info
140 | Opt_D_dump_cmmz_cafs
145 | Opt_D_dump_asm_native
146 | Opt_D_dump_asm_liveness
147 | Opt_D_dump_asm_coalesce
148 | Opt_D_dump_asm_regalloc
149 | Opt_D_dump_asm_regalloc_stages
150 | Opt_D_dump_asm_conflicts
151 | Opt_D_dump_asm_stats
152 | Opt_D_dump_asm_expanded
154 | Opt_D_dump_core_stats
160 | Opt_D_dump_inlinings
161 | Opt_D_dump_rule_firings
162 | Opt_D_dump_rule_rewrites
163 | Opt_D_dump_occur_anal
167 | Opt_D_dump_simpl_iterations
168 | Opt_D_dump_simpl_phases
177 | Opt_D_dump_worker_wrapper
178 | Opt_D_dump_rn_trace
179 | Opt_D_dump_rn_stats
181 | Opt_D_dump_simpl_stats
182 | Opt_D_dump_cs_trace -- Constraint solver in type checker
183 | Opt_D_dump_tc_trace
184 | Opt_D_dump_if_trace
185 | Opt_D_dump_vt_trace
192 | Opt_D_verbose_core2core
193 | Opt_D_verbose_stg2stg
195 | Opt_D_dump_hi_diffs
196 | Opt_D_dump_minimal_imports
197 | Opt_D_dump_mod_cycles
198 | Opt_D_dump_view_pattern_commoning
199 | Opt_D_faststring_stats
200 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
201 | Opt_D_no_debug_output
207 | Opt_WarnIsError -- -Werror; makes warnings fatal
208 | Opt_WarnDuplicateExports
210 | Opt_WarnImplicitPrelude
211 | Opt_WarnIncompletePatterns
212 | Opt_WarnIncompleteUniPatterns
213 | Opt_WarnIncompletePatternsRecUpd
214 | Opt_WarnMissingFields
215 | Opt_WarnMissingImportList
216 | Opt_WarnMissingMethods
217 | Opt_WarnMissingSigs
218 | Opt_WarnMissingLocalSigs
219 | Opt_WarnNameShadowing
220 | Opt_WarnOverlappingPatterns
221 | Opt_WarnTypeDefaults
222 | Opt_WarnMonomorphism
223 | Opt_WarnUnusedBinds
224 | Opt_WarnUnusedImports
225 | Opt_WarnUnusedMatches
226 | Opt_WarnWarningsDeprecations
227 | Opt_WarnDeprecatedFlags
228 | Opt_WarnDodgyExports
229 | Opt_WarnDodgyImports
231 | Opt_WarnAutoOrphans
234 | Opt_WarnUnrecognisedPragmas
235 | Opt_WarnDodgyForeignImports
236 | Opt_WarnLazyUnliftedBindings
237 | Opt_WarnUnusedDoBind
238 | Opt_WarnWrongDoBind
239 | Opt_WarnAlternativeLayoutRuleTransitional
241 | Opt_PrintExplicitForalls
248 | Opt_StaticArgumentTransformation
252 | Opt_DoLambdaEtaExpansion
256 | Opt_UnboxStrictFields
257 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
259 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
261 | Opt_RegsGraph -- do graph coloring register allocation
262 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
265 | Opt_IgnoreInterfacePragmas
266 | Opt_OmitInterfacePragmas
267 | Opt_ExposeAllUnfoldings
270 | Opt_AutoSccsOnAllToplevs
271 | Opt_AutoSccsOnExportedToplevs
272 | Opt_AutoSccsOnIndividualCafs
277 | Opt_ExcessPrecision
278 | Opt_EagerBlackHoling
279 | Opt_ReadUserPackageConf
283 | Opt_HideAllPackages
284 | Opt_PrintBindResult
288 | Opt_BreakOnException
290 | Opt_PrintEvldWithShow
291 | Opt_PrintBindContents
294 | Opt_EmitExternalCore
296 | Opt_BuildingCabalPackage
304 | Opt_ConvertToZipCfgAndBack
305 | Opt_AutoLinkPackages
306 | Opt_ImplicitImportQualified
314 | Opt_KeepRawTokenStream
319 data Language = Haskell98 | Haskell2010
323 | Opt_OverlappingInstances
324 | Opt_UndecidableInstances
325 | Opt_IncoherentInstances
326 | Opt_MonomorphismRestriction
329 | Opt_RelaxedPolyRec -- Deprecated
330 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
331 | Opt_ForeignFunctionInterface
332 | Opt_UnliftedFFITypes
333 | Opt_GHCForeignImportPrim
334 | Opt_ParallelArrays -- Syntactic support for parallel arrays
335 | Opt_Arrows -- Arrow-notation syntax
336 | Opt_TemplateHaskell
339 | Opt_Generics -- "Derivable type classes"
340 | Opt_ImplicitPrelude
341 | Opt_ScopedTypeVariables
345 | Opt_OverloadedStrings
346 | Opt_DisambiguateRecordFields
347 | Opt_RecordWildCards
353 | Opt_DoAndIfThenElse
354 | Opt_RebindableSyntax
356 | Opt_StandaloneDeriving
357 | Opt_DeriveDataTypeable
359 | Opt_DeriveTraversable
362 | Opt_TypeSynonymInstances
363 | Opt_FlexibleContexts
364 | Opt_FlexibleInstances
365 | Opt_ConstrainedClassMethods
366 | Opt_MultiParamTypeClasses
367 | Opt_FunctionalDependencies
369 | Opt_PolymorphicComponents
370 | Opt_ExistentialQuantification
374 | Opt_ParallelListComp
375 | Opt_TransformListComp
376 | Opt_MonadComprehensions
377 | Opt_GeneralizedNewtypeDeriving
380 | Opt_PostfixOperators
383 | Opt_LiberalTypeSynonyms
386 | Opt_ImpredicativeTypes
390 | Opt_AlternativeLayoutRule
391 | Opt_AlternativeLayoutRuleTransitional
392 | Opt_DatatypeContexts
393 | Opt_NondecreasingIndentation
397 -- | Contains not only a collection of 'DynFlag's but also a plethora of
398 -- information relating to the compilation of a single file or GHC session
399 data DynFlags = DynFlags {
402 hscTarget :: HscTarget,
403 hscOutName :: String, -- ^ Name of the output file
404 extCoreName :: String, -- ^ Name of the .hcr output file
405 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
406 optLevel :: Int, -- ^ Optimisation level
407 simplPhases :: Int, -- ^ Number of simplifier phases
408 maxSimplIterations :: Int, -- ^ Max simplifier iterations
409 shouldDumpSimplPhase :: Maybe String,
410 ruleCheck :: Maybe String,
411 strictnessBefore :: [Int], -- ^ Additional demand analysis
413 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
414 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
415 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
416 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
417 -- See CoreMonad.FloatOutSwitches
419 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
420 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
421 importPaths :: [FilePath],
423 mainFunIs :: Maybe String,
424 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
426 dphBackend :: DPHBackend,
428 thisPackage :: PackageId, -- ^ name of package currently being compiled
431 ways :: [Way], -- ^ Way flags from the command line
432 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
433 rtsBuildTag :: String, -- ^ The RTS \"way\"
435 -- For object splitting
436 splitInfo :: Maybe (String,Int),
439 objectDir :: Maybe String,
440 dylibInstallName :: Maybe String,
441 hiDir :: Maybe String,
442 stubDir :: Maybe String,
448 outputFile :: Maybe String,
449 outputHi :: Maybe String,
450 dynLibLoader :: DynLibLoader,
452 -- | This is set by 'DriverPipeline.runPipeline' based on where
453 -- its output is going.
454 dumpPrefix :: Maybe FilePath,
456 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
457 -- Set by @-ddump-file-prefix@
458 dumpPrefixForce :: Maybe FilePath,
460 includePaths :: [String],
461 libraryPaths :: [String],
462 frameworkPaths :: [String], -- used on darwin only
463 cmdlineFrameworks :: [String], -- ditto
465 rtsOpts :: Maybe String,
466 rtsOptsEnabled :: RtsOptsEnabled,
468 hpcDir :: String, -- ^ Path to store the .mix files
470 settings :: Settings,
473 depMakefile :: FilePath,
474 depIncludePkgDeps :: Bool,
475 depExcludeMods :: [ModuleName],
476 depSuffixes :: [String],
479 extraPkgConfs :: [FilePath],
480 -- ^ The @-package-conf@ flags given on the command line, in the order
483 packageFlags :: [PackageFlag],
484 -- ^ The @-package@ and @-hide-package@ flags from the command-line
487 -- NB. do not modify this field, it is calculated by
488 -- Packages.initPackages and Packages.updatePackages.
489 pkgDatabase :: Maybe [PackageConfig],
490 pkgState :: PackageState,
493 -- These have to be IORefs, because the defaultCleanupHandler needs to
494 -- know what to clean when an exception happens
495 filesToClean :: IORef [FilePath],
496 dirsToClean :: IORef (Map FilePath FilePath),
498 -- Names of files which were generated from -ddump-to-file; used to
499 -- track which ones we need to truncate because it's our first run
501 generatedDumps :: IORef (Set FilePath),
505 -- Don't change this without updating extensionFlags:
506 language :: Maybe Language,
507 -- Don't change this without updating extensionFlags:
508 extensions :: [OnOff ExtensionFlag],
509 -- extensionFlags should always be equal to
510 -- flattenExtensionFlags language extensions
511 extensionFlags :: [ExtensionFlag],
513 -- | Message output action: use "ErrUtils" instead of this if you can
514 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
516 haddockOptions :: Maybe String
519 data Settings = Settings {
520 sGhcUsagePath :: FilePath, -- Filled in by SysTools
521 sGhciUsagePath :: FilePath, -- ditto
523 sTmpDir :: String, -- no trailing '/'
524 -- You shouldn't need to look things up in rawSettings directly.
525 -- They should have their own fields instead.
526 sRawSettings :: [(String, String)],
527 sExtraGccViaCFlags :: [String],
528 sSystemPackageConfig :: FilePath,
529 -- commands for particular phases
531 sPgm_P :: (String,[Option]),
533 sPgm_c :: (String,[Option]),
534 sPgm_s :: (String,[Option]),
535 sPgm_a :: (String,[Option]),
536 sPgm_l :: (String,[Option]),
537 sPgm_dll :: (String,[Option]),
539 sPgm_sysman :: String,
540 sPgm_windres :: String,
541 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
542 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
543 -- options for particular phases
551 sOpt_windres :: [String],
552 sOpt_lo :: [String], -- LLVM: llvm optimiser
553 sOpt_lc :: [String] -- LLVM: llc static compiler
557 ghcUsagePath :: DynFlags -> FilePath
558 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
559 ghciUsagePath :: DynFlags -> FilePath
560 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
561 topDir :: DynFlags -> FilePath
562 topDir dflags = sTopDir (settings dflags)
563 tmpDir :: DynFlags -> String
564 tmpDir dflags = sTmpDir (settings dflags)
565 rawSettings :: DynFlags -> [(String, String)]
566 rawSettings dflags = sRawSettings (settings dflags)
567 extraGccViaCFlags :: DynFlags -> [String]
568 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
569 systemPackageConfig :: DynFlags -> FilePath
570 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
571 pgm_L :: DynFlags -> String
572 pgm_L dflags = sPgm_L (settings dflags)
573 pgm_P :: DynFlags -> (String,[Option])
574 pgm_P dflags = sPgm_P (settings dflags)
575 pgm_F :: DynFlags -> String
576 pgm_F dflags = sPgm_F (settings dflags)
577 pgm_c :: DynFlags -> (String,[Option])
578 pgm_c dflags = sPgm_c (settings dflags)
579 pgm_s :: DynFlags -> (String,[Option])
580 pgm_s dflags = sPgm_s (settings dflags)
581 pgm_a :: DynFlags -> (String,[Option])
582 pgm_a dflags = sPgm_a (settings dflags)
583 pgm_l :: DynFlags -> (String,[Option])
584 pgm_l dflags = sPgm_l (settings dflags)
585 pgm_dll :: DynFlags -> (String,[Option])
586 pgm_dll dflags = sPgm_dll (settings dflags)
587 pgm_T :: DynFlags -> String
588 pgm_T dflags = sPgm_T (settings dflags)
589 pgm_sysman :: DynFlags -> String
590 pgm_sysman dflags = sPgm_sysman (settings dflags)
591 pgm_windres :: DynFlags -> String
592 pgm_windres dflags = sPgm_windres (settings dflags)
593 pgm_lo :: DynFlags -> (String,[Option])
594 pgm_lo dflags = sPgm_lo (settings dflags)
595 pgm_lc :: DynFlags -> (String,[Option])
596 pgm_lc dflags = sPgm_lc (settings dflags)
597 opt_L :: DynFlags -> [String]
598 opt_L dflags = sOpt_L (settings dflags)
599 opt_P :: DynFlags -> [String]
600 opt_P dflags = sOpt_P (settings dflags)
601 opt_F :: DynFlags -> [String]
602 opt_F dflags = sOpt_F (settings dflags)
603 opt_c :: DynFlags -> [String]
604 opt_c dflags = sOpt_c (settings dflags)
605 opt_m :: DynFlags -> [String]
606 opt_m dflags = sOpt_m (settings dflags)
607 opt_a :: DynFlags -> [String]
608 opt_a dflags = sOpt_a (settings dflags)
609 opt_l :: DynFlags -> [String]
610 opt_l dflags = sOpt_l (settings dflags)
611 opt_windres :: DynFlags -> [String]
612 opt_windres dflags = sOpt_windres (settings dflags)
613 opt_lo :: DynFlags -> [String]
614 opt_lo dflags = sOpt_lo (settings dflags)
615 opt_lc :: DynFlags -> [String]
616 opt_lc dflags = sOpt_lc (settings dflags)
618 wayNames :: DynFlags -> [WayName]
619 wayNames = map wayName . ways
621 -- | The target code type of the compilation (if any).
623 -- Whenever you change the target, also make sure to set 'ghcLink' to
624 -- something sensible.
626 -- 'HscNothing' can be used to avoid generating any output, however, note
629 -- * This will not run the desugaring step, thus no warnings generated in
630 -- this step will be output. In particular, this includes warnings related
631 -- to pattern matching. You can run the desugarer manually using
632 -- 'GHC.desugarModule'.
634 -- * If a program uses Template Haskell the typechecker may try to run code
635 -- from an imported module. This will fail if no code has been generated
636 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
637 -- whether this might be the case and choose to either switch to a
638 -- different target or avoid typechecking such modules. (The latter may
639 -- preferable for security reasons.)
642 = HscC -- ^ Generate C code.
643 | HscAsm -- ^ Generate assembly using the native code generator.
644 | HscLlvm -- ^ Generate assembly using the llvm code generator.
645 | HscJava -- ^ Generate Java bytecode.
646 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
647 | HscNothing -- ^ Don't generate any code. See notes above.
650 showHscTargetFlag :: HscTarget -> String
651 showHscTargetFlag HscC = "-fvia-c"
652 showHscTargetFlag HscAsm = "-fasm"
653 showHscTargetFlag HscLlvm = "-fllvm"
654 showHscTargetFlag HscJava = panic "No flag for HscJava"
655 showHscTargetFlag HscInterpreted = "-fbyte-code"
656 showHscTargetFlag HscNothing = "-fno-code"
658 -- | Will this target result in an object file on the disk?
659 isObjectTarget :: HscTarget -> Bool
660 isObjectTarget HscC = True
661 isObjectTarget HscAsm = True
662 isObjectTarget HscLlvm = True
663 isObjectTarget _ = False
665 -- | The 'GhcMode' tells us whether we're doing multi-module
666 -- compilation (controlled via the "GHC" API) or one-shot
667 -- (single-module) compilation. This makes a difference primarily to
668 -- the "Finder": in one-shot mode we look for interface files for
669 -- imported modules, but in multi-module mode we look for source files
670 -- in order to check whether they need to be recompiled.
672 = CompManager -- ^ @\-\-make@, GHCi, etc.
673 | OneShot -- ^ @ghc -c Foo.hs@
674 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
677 instance Outputable GhcMode where
678 ppr CompManager = ptext (sLit "CompManager")
679 ppr OneShot = ptext (sLit "OneShot")
680 ppr MkDepend = ptext (sLit "MkDepend")
682 isOneShot :: GhcMode -> Bool
683 isOneShot OneShot = True
684 isOneShot _other = False
686 -- | What to do in the link step, if there is one.
688 = NoLink -- ^ Don't link at all
689 | LinkBinary -- ^ Link object code into a binary
690 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
691 -- bytecode and object code).
692 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
695 isNoLink :: GhcLink -> Bool
696 isNoLink NoLink = True
699 -- Is it worth evaluating this Bool and caching it in the DynFlags value
700 -- during initDynFlags?
701 doingTickyProfiling :: DynFlags -> Bool
702 doingTickyProfiling _ = opt_Ticky
703 -- XXX -ticky is a static flag, because it implies -debug which is also
704 -- static. If the way flags were made dynamic, we could fix this.
707 = ExposePackage String
708 | ExposePackageId String
710 | IgnorePackage String
713 defaultHscTarget :: HscTarget
714 defaultHscTarget = defaultObjectTarget
716 -- | The 'HscTarget' value corresponding to the default way to create
717 -- object files on the current platform.
718 defaultObjectTarget :: HscTarget
720 | cGhcUnregisterised == "YES" = HscC
721 | cGhcWithNativeCodeGen == "YES" = HscAsm
722 | otherwise = HscLlvm
729 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
732 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
733 initDynFlags :: DynFlags -> IO DynFlags
734 initDynFlags dflags = do
735 -- someday these will be dynamic flags
736 ways <- readIORef v_Ways
737 refFilesToClean <- newIORef []
738 refDirsToClean <- newIORef Map.empty
739 refGeneratedDumps <- newIORef Set.empty
742 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
743 rtsBuildTag = mkBuildTag ways,
744 filesToClean = refFilesToClean,
745 dirsToClean = refDirsToClean,
746 generatedDumps = refGeneratedDumps
749 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
750 -- and must be fully initialized by 'GHC.newSession' first.
751 defaultDynFlags :: Settings -> DynFlags
752 defaultDynFlags mySettings =
754 ghcMode = CompManager,
755 ghcLink = LinkBinary,
756 hscTarget = defaultHscTarget,
762 maxSimplIterations = 4,
763 shouldDumpSimplPhase = Nothing,
765 specConstrThreshold = Just 2000,
766 specConstrCount = Just 3,
767 liberateCaseThreshold = Just 2000,
768 floatLamArgs = Just 0, -- Default: float only if no fvs
769 strictnessBefore = [],
771 targetPlatform = defaultTargetPlatform,
772 cmdlineHcIncludes = [],
776 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
778 dphBackend = DPHNone,
780 thisPackage = mainPackageId,
783 dylibInstallName = Nothing,
787 objectSuf = phaseInputExt StopLn,
788 hcSuf = phaseInputExt HCc,
791 outputFile = Nothing,
793 dynLibLoader = SystemDependent,
794 dumpPrefix = Nothing,
795 dumpPrefixForce = Nothing,
799 cmdlineFrameworks = [],
801 rtsOptsEnabled = RtsOptsSafeOnly,
807 pkgDatabase = Nothing,
808 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
809 ways = panic "defaultDynFlags: No ways",
810 buildTag = panic "defaultDynFlags: No buildTag",
811 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
813 settings = mySettings,
815 depMakefile = "Makefile",
816 depIncludePkgDeps = False,
819 -- end of ghc -M values
820 filesToClean = panic "defaultDynFlags: No filesToClean",
821 dirsToClean = panic "defaultDynFlags: No dirsToClean",
822 generatedDumps = panic "defaultDynFlags: No generatedDumps",
823 haddockOptions = Nothing,
824 flags = defaultFlags,
827 extensionFlags = flattenExtensionFlags Nothing [],
829 log_action = \severity srcSpan style msg ->
831 SevOutput -> printSDoc msg style
832 SevInfo -> printErrs msg style
833 SevFatal -> printErrs msg style
836 printErrs (mkLocMessage srcSpan msg) style
837 -- careful (#2302): printErrs prints in UTF-8, whereas
838 -- converting to string first and using hPutStr would
839 -- just emit the low 8 bits of each unicode char.
843 Note [Verbosity levels]
844 ~~~~~~~~~~~~~~~~~~~~~~~
845 0 | print errors & warnings only
846 1 | minimal verbosity: print "compiling M ... done." for each module.
847 2 | equivalent to -dshow-passes
848 3 | equivalent to existing "ghc -v"
849 4 | "ghc -v -ddump-most"
850 5 | "ghc -v -ddump-all"
856 -- OnOffs accumulate in reverse order, so we use foldr in order to
857 -- process them in the right order
858 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
860 flattenExtensionFlags ml = foldr f defaultExtensionFlags
861 where f (On f) flags = f : delete f flags
862 f (Off f) flags = delete f flags
863 defaultExtensionFlags = languageExtensions ml
865 languageExtensions :: Maybe Language -> [ExtensionFlag]
867 languageExtensions Nothing
868 -- Nothing => the default case
869 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
870 -- behaviour the default, to see if anyone notices
872 -- In due course I'd like Opt_MonoLocalBinds to be on by default
873 -- But NB it's implied by GADTs etc
874 -- SLPJ September 2010
875 : Opt_NondecreasingIndentation -- This has been on by default for some time
876 : delete Opt_DatatypeContexts -- The Haskell' committee decided to
877 -- remove datatype contexts from the
879 -- http://www.haskell.org/pipermail/haskell-prime/2011-January/003335.html
880 (languageExtensions (Just Haskell2010))
882 languageExtensions (Just Haskell98)
883 = [Opt_ImplicitPrelude,
884 Opt_MonomorphismRestriction,
886 Opt_DatatypeContexts,
887 Opt_NondecreasingIndentation
888 -- strictly speaking non-standard, but we always had this
889 -- on implicitly before the option was added in 7.1, and
890 -- turning it off breaks code, so we're keeping it on for
891 -- backwards compatibility. Cabal uses -XHaskell98 by
892 -- default unless you specify another language.
895 languageExtensions (Just Haskell2010)
896 = [Opt_ImplicitPrelude,
897 Opt_MonomorphismRestriction,
898 Opt_DatatypeContexts,
900 Opt_ForeignFunctionInterface,
905 -- | Test whether a 'DynFlag' is set
906 dopt :: DynFlag -> DynFlags -> Bool
907 dopt f dflags = f `elem` (flags dflags)
910 dopt_set :: DynFlags -> DynFlag -> DynFlags
911 dopt_set dfs f = dfs{ flags = f : flags dfs }
913 -- | Unset a 'DynFlag'
914 dopt_unset :: DynFlags -> DynFlag -> DynFlags
915 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
917 -- | Test whether a 'ExtensionFlag' is set
918 xopt :: ExtensionFlag -> DynFlags -> Bool
919 xopt f dflags = f `elem` extensionFlags dflags
921 -- | Set a 'ExtensionFlag'
922 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
924 = let onoffs = On f : extensions dfs
925 in dfs { extensions = onoffs,
926 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
928 -- | Unset a 'ExtensionFlag'
929 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
931 = let onoffs = Off f : extensions dfs
932 in dfs { extensions = onoffs,
933 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
935 setLanguage :: Language -> DynP ()
936 setLanguage l = upd f
937 where f dfs = let mLang = Just l
938 oneoffs = extensions dfs
941 extensionFlags = flattenExtensionFlags mLang oneoffs
944 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
945 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
946 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
947 -> [a] -- ^ Correctly ordered extracted options
948 getOpts dflags opts = reverse (opts dflags)
949 -- We add to the options from the front, so we need to reverse the list
951 -- | Gets the verbosity flag for the current verbosity level. This is fed to
952 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
953 getVerbFlags :: DynFlags -> [String]
955 | verbosity dflags >= 4 = ["-v"]
958 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
959 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
960 setPgmP, addOptl, addOptP,
961 addCmdlineFramework, addHaddockOpts
962 :: String -> DynFlags -> DynFlags
963 setOutputFile, setOutputHi, setDumpPrefixForce
964 :: Maybe String -> DynFlags -> DynFlags
966 setObjectDir f d = d{ objectDir = Just f}
967 setHiDir f d = d{ hiDir = Just f}
968 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
969 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
970 -- \#included from the .hc file when compiling via C (i.e. unregisterised
972 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
973 setDylibInstallName f d = d{ dylibInstallName = Just f}
975 setObjectSuf f d = d{ objectSuf = f}
976 setHiSuf f d = d{ hiSuf = f}
977 setHcSuf f d = d{ hcSuf = f}
979 setOutputFile f d = d{ outputFile = f}
980 setOutputHi f d = d{ outputHi = f}
982 parseDynLibLoaderMode f d =
984 ("deploy", "") -> d{ dynLibLoader = Deployable }
985 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
986 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
988 setDumpPrefixForce f d = d { dumpPrefixForce = f}
990 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
991 -- Config.hs should really use Option.
992 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
993 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
994 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
997 setDepMakefile :: FilePath -> DynFlags -> DynFlags
998 setDepMakefile f d = d { depMakefile = deOptDep f }
1000 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
1001 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
1003 addDepExcludeMod :: String -> DynFlags -> DynFlags
1004 addDepExcludeMod m d
1005 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
1007 addDepSuffix :: FilePath -> DynFlags -> DynFlags
1008 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
1011 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
1012 -- we need to strip the "-optdep" off of the arg
1013 deOptDep :: String -> String
1014 deOptDep x = case stripPrefix "-optdep" x of
1018 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
1020 addHaddockOpts f d = d{ haddockOptions = Just f}
1022 -- -----------------------------------------------------------------------------
1023 -- Command-line options
1025 -- | When invoking external tools as part of the compilation pipeline, we
1026 -- pass these a sequence of options on the command-line. Rather than
1027 -- just using a list of Strings, we use a type that allows us to distinguish
1028 -- between filepaths and 'other stuff'. The reason for this is that
1029 -- this type gives us a handle on transforming filenames, and filenames only,
1030 -- to whatever format they're expected to be on a particular platform.
1032 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1033 String -- a non-filepath prefix that shouldn't be
1034 -- transformed (e.g., "/out=")
1035 String -- the filepath/filename portion
1038 showOpt :: Option -> String
1039 showOpt (FileOption pre f) = pre ++ f
1040 showOpt (Option s) = s
1042 -----------------------------------------------------------------------------
1043 -- Setting the optimisation level
1045 updOptLevel :: Int -> DynFlags -> DynFlags
1046 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1048 = dfs2{ optLevel = final_n }
1050 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1051 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1052 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1054 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1055 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1057 -- -----------------------------------------------------------------------------
1058 -- StgToDo: abstraction of stg-to-stg passes to run.
1061 = StgDoMassageForProfiling -- should be (next to) last
1062 -- There's also setStgVarInfo, but its absolute "lastness"
1063 -- is so critical that it is hardwired in (no flag).
1066 getStgToDo :: DynFlags -> [StgToDo]
1070 stg_stats = dopt Opt_StgStats dflags
1072 todo1 = if stg_stats then [D_stg_stats] else []
1074 todo2 | WayProf `elem` wayNames dflags
1075 = StgDoMassageForProfiling : todo1
1079 {- **********************************************************************
1083 %********************************************************************* -}
1085 -- -----------------------------------------------------------------------------
1086 -- Parsing the dynamic flags.
1088 -- | Parse dynamic flags from a list of command line arguments. Returns the
1089 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1090 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1091 -- flags or missing arguments).
1092 parseDynamicFlags :: Monad m =>
1093 DynFlags -> [Located String]
1094 -> m (DynFlags, [Located String], [Located String])
1095 -- ^ Updated 'DynFlags', left-over arguments, and
1096 -- list of warnings.
1097 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1099 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1100 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1101 parseDynamicNoPackageFlags :: Monad m =>
1102 DynFlags -> [Located String]
1103 -> m (DynFlags, [Located String], [Located String])
1104 -- ^ Updated 'DynFlags', left-over arguments, and
1105 -- list of warnings.
1106 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1108 parseDynamicFlags_ :: Monad m =>
1109 DynFlags -> [Located String] -> Bool
1110 -> m (DynFlags, [Located String], [Located String])
1111 parseDynamicFlags_ dflags0 args pkg_flags = do
1112 -- XXX Legacy support code
1113 -- We used to accept things like
1114 -- optdep-f -optdepdepend
1115 -- optdep-f -optdep depend
1116 -- optdep -f -optdepdepend
1117 -- optdep -f -optdep depend
1118 -- but the spaces trip up proper argument handling. So get rid of them.
1119 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1120 f (x : xs) = x : f xs
1124 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1125 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1126 | otherwise = dynamic_flags
1128 let ((leftover, errs, warns), dflags1)
1129 = runCmdLine (processArgs flag_spec args') dflags0
1130 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1132 return (dflags1, leftover, warns)
1135 {- **********************************************************************
1137 DynFlags specifications
1139 %********************************************************************* -}
1141 allFlags :: [String]
1142 allFlags = map ('-':) $
1143 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1144 map ("fno-"++) flags ++
1145 map ("f"++) flags ++
1146 map ("f"++) flags' ++
1147 map ("X"++) supportedExtensions
1148 where ok (PrefixPred _ _) = False
1150 flags = [ name | (name, _, _) <- fFlags ]
1151 flags' = [ name | (name, _, _) <- fLangFlags ]
1153 --------------- The main flags themselves ------------------
1154 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1156 Flag "n" (NoArg (addWarn "The -n flag is deprecated and no longer has any effect"))
1157 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1158 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1160 (HasArg (\s -> do { addCmdlineHCInclude s
1161 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1162 , Flag "v" (OptIntSuffix setVerbosity)
1164 ------- Specific phases --------------------------------------------
1165 -- need to appear before -pgmL to be parsed as LLVM flags.
1166 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1167 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1168 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1169 , Flag "pgmP" (hasArg setPgmP)
1170 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1171 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1172 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1173 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1174 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1175 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1176 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1177 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1179 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1180 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1181 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1182 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1183 , Flag "optP" (hasArg addOptP)
1184 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1185 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1186 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1187 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1188 , Flag "optl" (hasArg addOptl)
1189 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1192 (NoArg (if can_split
1193 then setDynFlag Opt_SplitObjs
1194 else addWarn "ignoring -fsplit-objs"))
1196 -------- ghc -M -----------------------------------------------------
1197 , Flag "dep-suffix" (hasArg addDepSuffix)
1198 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1199 , Flag "dep-makefile" (hasArg setDepMakefile)
1200 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1201 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1202 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1203 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1204 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1205 , Flag "exclude-module" (hasArg addDepExcludeMod)
1206 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1207 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1209 -------- Linking ----------------------------------------------------
1210 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1211 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1212 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1213 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1215 ------- Libraries ---------------------------------------------------
1216 , Flag "L" (Prefix addLibraryPath)
1217 , Flag "l" (hasArg (addOptl . ("-l" ++)))
1219 ------- Frameworks --------------------------------------------------
1220 -- -framework-path should really be -F ...
1221 , Flag "framework-path" (HasArg addFrameworkPath)
1222 , Flag "framework" (hasArg addCmdlineFramework)
1224 ------- Output Redirection ------------------------------------------
1225 , Flag "odir" (hasArg setObjectDir)
1226 , Flag "o" (SepArg (upd . setOutputFile . Just))
1227 , Flag "ohi" (hasArg (setOutputHi . Just ))
1228 , Flag "osuf" (hasArg setObjectSuf)
1229 , Flag "hcsuf" (hasArg setHcSuf)
1230 , Flag "hisuf" (hasArg setHiSuf)
1231 , Flag "hidir" (hasArg setHiDir)
1232 , Flag "tmpdir" (hasArg setTmpDir)
1233 , Flag "stubdir" (hasArg setStubDir)
1234 , Flag "outputdir" (hasArg setOutputDir)
1235 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1237 ------- Keeping temporary files -------------------------------------
1238 -- These can be singular (think ghc -c) or plural (think ghc --make)
1239 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1240 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1241 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1242 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1243 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1244 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1245 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1246 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1247 -- This only makes sense as plural
1248 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1250 ------- Miscellaneous ----------------------------------------------
1251 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1252 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1253 , Flag "with-rtsopts" (HasArg setRtsOpts)
1254 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1255 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1256 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1257 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1258 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1259 , Flag "main-is" (SepArg setMainIs)
1260 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1261 , Flag "haddock-opts" (hasArg addHaddockOpts)
1262 , Flag "hpcdir" (SepArg setOptHpcDir)
1264 ------- recompilation checker --------------------------------------
1265 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1266 ; deprecate "Use -fno-force-recomp instead" }))
1267 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1268 ; deprecate "Use -fforce-recomp instead" }))
1270 ------ HsCpp opts ---------------------------------------------------
1271 , Flag "D" (AnySuffix (upd . addOptP))
1272 , Flag "U" (AnySuffix (upd . addOptP))
1274 ------- Include/Import Paths ----------------------------------------
1275 , Flag "I" (Prefix addIncludePath)
1276 , Flag "i" (OptPrefix addImportPath)
1278 ------ Debugging ----------------------------------------------------
1279 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1281 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1282 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1283 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1284 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1285 , Flag "ddump-cmmz-cbe" (setDumpFlag Opt_D_dump_cmmz_cbe)
1286 , Flag "ddump-cmmz-spills" (setDumpFlag Opt_D_dump_cmmz_spills)
1287 , Flag "ddump-cmmz-proc" (setDumpFlag Opt_D_dump_cmmz_proc)
1288 , Flag "ddump-cmmz-rewrite" (setDumpFlag Opt_D_dump_cmmz_rewrite)
1289 , Flag "ddump-cmmz-dead" (setDumpFlag Opt_D_dump_cmmz_dead)
1290 , Flag "ddump-cmmz-stub" (setDumpFlag Opt_D_dump_cmmz_stub)
1291 , Flag "ddump-cmmz-sp" (setDumpFlag Opt_D_dump_cmmz_sp)
1292 , Flag "ddump-cmmz-procmap" (setDumpFlag Opt_D_dump_cmmz_procmap)
1293 , Flag "ddump-cmmz-split" (setDumpFlag Opt_D_dump_cmmz_split)
1294 , Flag "ddump-cmmz-lower" (setDumpFlag Opt_D_dump_cmmz_lower)
1295 , Flag "ddump-cmmz-info" (setDumpFlag Opt_D_dump_cmmz_info)
1296 , Flag "ddump-cmmz-cafs" (setDumpFlag Opt_D_dump_cmmz_cafs)
1297 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1298 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1299 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1300 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1301 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1302 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1303 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1304 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1305 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1306 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1307 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1308 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1309 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1310 ; setDumpFlag' Opt_D_dump_llvm}))
1311 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1312 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1313 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1314 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1315 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1316 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1317 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1318 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1319 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1320 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1321 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1322 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1323 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1324 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1325 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1326 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1327 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1328 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1329 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1330 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1331 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1332 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1333 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1334 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1335 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1336 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1337 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1338 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1339 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1340 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1341 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1342 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1343 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1344 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1345 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1346 ; setVerboseCore2Core }))
1347 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1348 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1349 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1350 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1351 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1352 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1353 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1354 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1355 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1356 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1357 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1358 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1359 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1360 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1361 , Flag "dshow-passes" (NoArg (do forceRecompile
1362 setVerbosity (Just 2)))
1363 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1365 ------ Machine dependant (-m<blah>) stuff ---------------------------
1367 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1368 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1369 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1370 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1372 ------ Warning opts -------------------------------------------------
1373 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1374 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1375 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1376 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1377 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1378 ; deprecate "Use -w instead" }))
1379 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1381 ------ Optimisation flags ------------------------------------------
1382 , Flag "O" (noArgM (setOptLevel 1))
1383 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1384 setOptLevel 0 dflags))
1385 , Flag "Odph" (noArgM setDPHOpt)
1386 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1387 -- If the number is missing, use 1
1389 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1390 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1391 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1392 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1393 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1394 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1395 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1396 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1397 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1398 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1399 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1400 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1401 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1403 ------ Profiling ----------------------------------------------------
1405 -- XXX Should the -f* flags be deprecated?
1406 -- They don't seem to be documented
1407 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1408 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1409 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1410 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1411 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1412 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1413 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1414 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1415 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1417 ------ DPH flags ----------------------------------------------------
1419 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1420 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1421 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1422 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1424 ------ Compiler flags -----------------------------------------------
1426 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1427 , Flag "fvia-c" (NoArg
1428 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1429 , Flag "fvia-C" (NoArg
1430 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1431 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1433 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1434 setTarget HscNothing))
1435 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1436 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1437 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1438 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1440 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1441 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1442 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1443 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1444 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1445 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1446 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1448 package_flags :: [Flag (CmdLineP DynFlags)]
1450 ------- Packages ----------------------------------------------------
1451 Flag "package-conf" (HasArg extraPkgConf_)
1452 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1453 , Flag "package-name" (hasArg setPackageName)
1454 , Flag "package-id" (HasArg exposePackageId)
1455 , Flag "package" (HasArg exposePackage)
1456 , Flag "hide-package" (HasArg hidePackage)
1457 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1458 , Flag "ignore-package" (HasArg ignorePackage)
1459 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1460 ; deprecate "Use -package instead" }))
1463 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1464 -- False <=> we are turning the flag off
1465 turnOn :: TurnOnFlag; turnOn = True
1466 turnOff :: TurnOnFlag; turnOff = False
1469 = ( String -- Flag in string form
1470 , flag -- Flag in internal form
1471 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1472 -- Typically, emit a warning or error
1474 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1475 -> String -- ^ The flag prefix
1476 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1477 -> FlagSpec flag -- ^ Specification of this particular flag
1478 -> Flag (CmdLineP DynFlags)
1479 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1480 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1482 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1483 deprecatedForExtension lang turn_on
1484 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1486 flag | turn_on = lang
1487 | otherwise = "No"++lang
1489 useInstead :: String -> TurnOnFlag -> DynP ()
1490 useInstead flag turn_on
1491 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1493 no = if turn_on then "" else "no-"
1495 nop :: TurnOnFlag -> DynP ()
1498 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1499 fFlags :: [FlagSpec DynFlag]
1501 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1502 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1503 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1504 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1505 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1506 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1507 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1508 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1509 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1510 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1511 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1512 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1513 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1514 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1515 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1516 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1517 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1518 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1519 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1520 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1521 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1522 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1523 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1524 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1525 ( "warn-orphans", Opt_WarnOrphans, nop ),
1526 ( "warn-identities", Opt_WarnIdentities, nop ),
1527 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1528 ( "warn-tabs", Opt_WarnTabs, nop ),
1529 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1530 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1531 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1532 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1533 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1534 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1535 ( "strictness", Opt_Strictness, nop ),
1536 ( "specialise", Opt_Specialise, nop ),
1537 ( "float-in", Opt_FloatIn, nop ),
1538 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1539 ( "full-laziness", Opt_FullLaziness, nop ),
1540 ( "liberate-case", Opt_LiberateCase, nop ),
1541 ( "spec-constr", Opt_SpecConstr, nop ),
1542 ( "cse", Opt_CSE, nop ),
1543 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1544 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1545 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1546 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1547 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1548 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1549 ( "case-merge", Opt_CaseMerge, nop ),
1550 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1551 ( "method-sharing", Opt_MethodSharing,
1552 \_ -> deprecate "doesn't do anything any more"),
1553 -- Remove altogether in GHC 7.2
1554 ( "dicts-cheap", Opt_DictsCheap, nop ),
1555 ( "excess-precision", Opt_ExcessPrecision, nop ),
1556 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1557 ( "print-bind-result", Opt_PrintBindResult, nop ),
1558 ( "force-recomp", Opt_ForceRecomp, nop ),
1559 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1560 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1561 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1562 ( "break-on-exception", Opt_BreakOnException, nop ),
1563 ( "break-on-error", Opt_BreakOnError, nop ),
1564 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1565 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1566 ( "run-cps", Opt_RunCPS, nop ),
1567 ( "run-cpsz", Opt_RunCPSZ, nop ),
1568 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1569 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1570 ( "vectorise", Opt_Vectorise, nop ),
1571 ( "regs-graph", Opt_RegsGraph, nop ),
1572 ( "regs-iterative", Opt_RegsIterative, nop ),
1573 ( "gen-manifest", Opt_GenManifest, nop ),
1574 ( "embed-manifest", Opt_EmbedManifest, nop ),
1575 ( "ext-core", Opt_EmitExternalCore, nop ),
1576 ( "shared-implib", Opt_SharedImplib, nop ),
1577 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1578 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1579 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1580 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1583 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1584 fLangFlags :: [FlagSpec ExtensionFlag]
1586 ( "th", Opt_TemplateHaskell,
1587 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1588 ( "fi", Opt_ForeignFunctionInterface,
1589 deprecatedForExtension "ForeignFunctionInterface" ),
1590 ( "ffi", Opt_ForeignFunctionInterface,
1591 deprecatedForExtension "ForeignFunctionInterface" ),
1592 ( "arrows", Opt_Arrows,
1593 deprecatedForExtension "Arrows" ),
1594 ( "generics", Opt_Generics,
1595 deprecatedForExtension "Generics" ),
1596 ( "implicit-prelude", Opt_ImplicitPrelude,
1597 deprecatedForExtension "ImplicitPrelude" ),
1598 ( "bang-patterns", Opt_BangPatterns,
1599 deprecatedForExtension "BangPatterns" ),
1600 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1601 deprecatedForExtension "MonomorphismRestriction" ),
1602 ( "mono-pat-binds", Opt_MonoPatBinds,
1603 deprecatedForExtension "MonoPatBinds" ),
1604 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1605 deprecatedForExtension "ExtendedDefaultRules" ),
1606 ( "implicit-params", Opt_ImplicitParams,
1607 deprecatedForExtension "ImplicitParams" ),
1608 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1609 deprecatedForExtension "ScopedTypeVariables" ),
1610 ( "parr", Opt_ParallelArrays,
1611 deprecatedForExtension "ParallelArrays" ),
1612 ( "PArr", Opt_ParallelArrays,
1613 deprecatedForExtension "ParallelArrays" ),
1614 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1615 deprecatedForExtension "OverlappingInstances" ),
1616 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1617 deprecatedForExtension "UndecidableInstances" ),
1618 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1619 deprecatedForExtension "IncoherentInstances" )
1622 supportedLanguages :: [String]
1623 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1625 supportedExtensions :: [String]
1626 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1628 supportedLanguagesAndExtensions :: [String]
1629 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1631 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1632 languageFlags :: [FlagSpec Language]
1634 ( "Haskell98", Haskell98, nop ),
1635 ( "Haskell2010", Haskell2010, nop )
1638 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1639 xFlags :: [FlagSpec ExtensionFlag]
1641 ( "CPP", Opt_Cpp, nop ),
1642 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1643 ( "TupleSections", Opt_TupleSections, nop ),
1644 ( "PatternGuards", Opt_PatternGuards, nop ),
1645 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1646 ( "MagicHash", Opt_MagicHash, nop ),
1647 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1648 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1649 ( "KindSignatures", Opt_KindSignatures, nop ),
1650 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1651 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1652 ( "TransformListComp", Opt_TransformListComp, nop ),
1653 ( "MonadComprehensions", Opt_MonadComprehensions, nop),
1654 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1655 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1656 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1657 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1658 ( "Rank2Types", Opt_Rank2Types, nop ),
1659 ( "RankNTypes", Opt_RankNTypes, nop ),
1660 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1661 ( "TypeOperators", Opt_TypeOperators, nop ),
1662 ( "RecursiveDo", Opt_RecursiveDo, -- Enables 'mdo'
1663 deprecatedForExtension "DoRec"),
1664 ( "DoRec", Opt_DoRec, nop ), -- Enables 'rec' keyword
1665 ( "Arrows", Opt_Arrows, nop ),
1666 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1667 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1668 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1669 ( "Generics", Opt_Generics, nop ),
1670 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1671 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1672 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1673 ( "RecordPuns", Opt_RecordPuns,
1674 deprecatedForExtension "NamedFieldPuns" ),
1675 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1676 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1677 ( "GADTs", Opt_GADTs, nop ),
1678 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1679 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1680 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1681 ( "BangPatterns", Opt_BangPatterns, nop ),
1682 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1683 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1684 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1685 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1686 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1687 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1688 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1689 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1690 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1691 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1692 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1693 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1694 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1695 \ turn_on -> if not turn_on
1696 then deprecate "You can't turn off RelaxedPolyRec any more"
1698 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1699 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1700 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1702 ( "PatternSignatures", Opt_ScopedTypeVariables,
1703 deprecatedForExtension "ScopedTypeVariables" ),
1705 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1706 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1707 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1708 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1709 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1710 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1711 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1712 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1713 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1714 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1715 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1716 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1717 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1718 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1719 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1720 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1721 ( "PackageImports", Opt_PackageImports, nop )
1724 defaultFlags :: [DynFlag]
1726 = [ Opt_AutoLinkPackages,
1727 Opt_ReadUserPackageConf,
1731 #if GHC_DEFAULT_NEW_CODEGEN
1737 Opt_PrintBindContents,
1742 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1743 -- The default -O0 options
1747 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1749 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1750 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1751 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1752 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1753 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1754 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1755 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1756 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1758 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1760 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1761 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1762 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1764 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1765 -- all over the place
1767 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1769 -- Record wild-cards implies field disambiguation
1770 -- Otherwise if you write (C {..}) you may well get
1771 -- stuff like " 'a' not in scope ", which is a bit silly
1772 -- if the compiler has just filled in field 'a' of constructor 'C'
1773 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1775 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1778 optLevelFlags :: [([Int], DynFlag)]
1780 = [ ([0], Opt_IgnoreInterfacePragmas)
1781 , ([0], Opt_OmitInterfacePragmas)
1783 , ([1,2], Opt_IgnoreAsserts)
1784 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1786 , ([1,2], Opt_DoEtaReduction)
1787 , ([1,2], Opt_CaseMerge)
1788 , ([1,2], Opt_Strictness)
1790 , ([1,2], Opt_FullLaziness)
1791 , ([1,2], Opt_Specialise)
1792 , ([1,2], Opt_FloatIn)
1794 , ([2], Opt_LiberateCase)
1795 , ([2], Opt_SpecConstr)
1796 , ([2], Opt_RegsGraph)
1798 -- , ([2], Opt_StaticArgumentTransformation)
1799 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1800 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1801 -- several improvements to the heuristics, and I'm concerned that without
1802 -- those changes SAT will interfere with some attempts to write "high
1803 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1804 -- this year. In particular, the version in HEAD lacks the tail call
1805 -- criterion, so many things that look like reasonable loops will be
1806 -- turned into functions with extra (unneccesary) thunk creation.
1808 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1809 -- This one is important for a tiresome reason:
1810 -- we want to make sure that the bindings for data
1811 -- constructors are eta-expanded. This is probably
1812 -- a good thing anyway, but it seems fragile.
1815 -- -----------------------------------------------------------------------------
1816 -- Standard sets of warning options
1818 standardWarnings :: [DynFlag]
1820 = [ Opt_WarnWarningsDeprecations,
1821 Opt_WarnDeprecatedFlags,
1822 Opt_WarnUnrecognisedPragmas,
1823 Opt_WarnOverlappingPatterns,
1824 Opt_WarnMissingFields,
1825 Opt_WarnMissingMethods,
1826 Opt_WarnDuplicateExports,
1827 Opt_WarnLazyUnliftedBindings,
1828 Opt_WarnDodgyForeignImports,
1829 Opt_WarnWrongDoBind,
1830 Opt_WarnAlternativeLayoutRuleTransitional
1833 minusWOpts :: [DynFlag]
1834 -- Things you get with -W
1836 = standardWarnings ++
1837 [ Opt_WarnUnusedBinds,
1838 Opt_WarnUnusedMatches,
1839 Opt_WarnUnusedImports,
1840 Opt_WarnIncompletePatterns,
1841 Opt_WarnDodgyExports,
1842 Opt_WarnDodgyImports
1845 minusWallOpts :: [DynFlag]
1846 -- Things you get with -Wall
1849 [ Opt_WarnTypeDefaults,
1850 Opt_WarnNameShadowing,
1851 Opt_WarnMissingSigs,
1854 Opt_WarnUnusedDoBind
1857 minuswRemovesOpts :: [DynFlag]
1858 -- minuswRemovesOpts should be every warning option
1862 Opt_WarnIncompletePatternsRecUpd,
1863 Opt_WarnIncompleteUniPatterns,
1864 Opt_WarnMonomorphism,
1865 Opt_WarnUnrecognisedPragmas,
1866 Opt_WarnAutoOrphans,
1867 Opt_WarnImplicitPrelude
1870 enableGlasgowExts :: DynP ()
1871 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1872 mapM_ setExtensionFlag glasgowExtsFlags
1874 disableGlasgowExts :: DynP ()
1875 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1876 mapM_ unSetExtensionFlag glasgowExtsFlags
1878 glasgowExtsFlags :: [ExtensionFlag]
1879 glasgowExtsFlags = [
1880 Opt_ForeignFunctionInterface
1881 , Opt_UnliftedFFITypes
1882 , Opt_ImplicitParams
1883 , Opt_ScopedTypeVariables
1885 , Opt_TypeSynonymInstances
1886 , Opt_StandaloneDeriving
1887 , Opt_DeriveDataTypeable
1889 , Opt_DeriveFoldable
1890 , Opt_DeriveTraversable
1891 , Opt_FlexibleContexts
1892 , Opt_FlexibleInstances
1893 , Opt_ConstrainedClassMethods
1894 , Opt_MultiParamTypeClasses
1895 , Opt_FunctionalDependencies
1897 , Opt_PolymorphicComponents
1898 , Opt_ExistentialQuantification
1900 , Opt_PostfixOperators
1902 , Opt_LiberalTypeSynonyms
1906 , Opt_ParallelListComp
1907 , Opt_EmptyDataDecls
1908 , Opt_KindSignatures
1909 , Opt_GeneralizedNewtypeDeriving ]
1912 -- Consult the RTS to find whether GHC itself has been built profiled
1913 -- If so, you can't use Template Haskell
1914 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1916 rtsIsProfiled :: Bool
1917 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1920 checkTemplateHaskellOk :: Bool -> DynP ()
1922 checkTemplateHaskellOk turn_on
1923 | turn_on && rtsIsProfiled
1924 = addErr "You can't use Template Haskell with a profiled compiler"
1928 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1929 -- so we simply say "ok". It doesn't matter because TH isn't
1930 -- available in stage 1 anyway.
1931 checkTemplateHaskellOk _ = return ()
1934 {- **********************************************************************
1936 DynFlags constructors
1938 %********************************************************************* -}
1940 type DynP = EwM (CmdLineP DynFlags)
1942 upd :: (DynFlags -> DynFlags) -> DynP ()
1943 upd f = liftEwM (do dflags <- getCmdLineState
1944 putCmdLineState $! f dflags)
1946 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1947 updM f = do dflags <- liftEwM getCmdLineState
1949 liftEwM $ putCmdLineState $! dflags'
1951 --------------- Constructor functions for OptKind -----------------
1952 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1953 noArg fn = NoArg (upd fn)
1955 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1956 noArgM fn = NoArg (updM fn)
1958 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1959 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1961 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1962 hasArg fn = HasArg (upd . fn)
1964 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1965 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1966 ; deprecate deprec })
1968 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1969 intSuffix fn = IntSuffix (\n -> upd (fn n))
1971 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1972 -> OptKind (CmdLineP DynFlags)
1973 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1975 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1976 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1978 --------------------------
1979 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1980 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1981 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1983 --------------------------
1984 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1985 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1988 deps = [ if turn_on then setExtensionFlag d
1989 else unSetExtensionFlag d
1990 | (f', turn_on, d) <- impliedFlags, f' == f ]
1991 -- When you set f, set the ones it implies
1992 -- NB: use setExtensionFlag recursively, in case the implied flags
1993 -- implies further flags
1995 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1996 -- When you un-set f, however, we don't un-set the things it implies
1997 -- (except for -fno-glasgow-exts, which is treated specially)
1999 --------------------------
2000 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
2001 alterSettings f dflags = dflags { settings = f (settings dflags) }
2003 --------------------------
2004 setDumpFlag' :: DynFlag -> DynP ()
2005 setDumpFlag' dump_flag
2006 = do { setDynFlag dump_flag
2007 ; when want_recomp forceRecompile }
2009 -- Certain dumpy-things are really interested in what's going
2010 -- on during recompilation checking, so in those cases we
2011 -- don't want to turn it off.
2012 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
2013 Opt_D_dump_hi_diffs]
2015 forceRecompile :: DynP ()
2016 -- Whenver we -ddump, force recompilation (by switching off the
2017 -- recompilation checker), else you don't see the dump! However,
2018 -- don't switch it off in --make mode, else *everything* gets
2019 -- recompiled which probably isn't what you want
2020 forceRecompile = do { dfs <- liftEwM getCmdLineState
2021 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2023 force_recomp dfs = isOneShot (ghcMode dfs)
2025 setVerboseCore2Core :: DynP ()
2026 setVerboseCore2Core = do forceRecompile
2027 setDynFlag Opt_D_verbose_core2core
2028 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2030 setDumpSimplPhases :: String -> DynP ()
2031 setDumpSimplPhases s = do forceRecompile
2032 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2034 spec = case s of { ('=' : s') -> s'; _ -> s }
2036 setVerbosity :: Maybe Int -> DynP ()
2037 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2039 addCmdlineHCInclude :: String -> DynP ()
2040 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2042 extraPkgConf_ :: FilePath -> DynP ()
2043 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2045 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2047 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2049 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2051 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2053 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2055 setPackageName :: String -> DynFlags -> DynFlags
2056 setPackageName p s = s{ thisPackage = stringToPackageId p }
2058 -- If we're linking a binary, then only targets that produce object
2059 -- code are allowed (requests for other target types are ignored).
2060 setTarget :: HscTarget -> DynP ()
2061 setTarget l = upd set
2064 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2067 -- Changes the target only if we're compiling object code. This is
2068 -- used by -fasm and -fllvm, which switch from one to the other, but
2069 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2070 -- can be safely used in an OPTIONS_GHC pragma.
2071 setObjTarget :: HscTarget -> DynP ()
2072 setObjTarget l = updM set
2075 | isObjectTarget (hscTarget dflags)
2078 | cGhcUnregisterised /= "YES" ->
2079 do addWarn ("Compiler not unregisterised, so ignoring " ++ flag)
2082 | cGhcWithNativeCodeGen /= "YES" ->
2083 do addWarn ("Compiler has no native codegen, so ignoring " ++
2087 | cGhcUnregisterised == "YES" ->
2088 do addWarn ("Compiler unregisterised, so ignoring " ++ flag)
2090 | not ((arch == ArchX86_64) && (os == OSLinux || os == OSDarwin)) &&
2091 (not opt_Static || opt_PIC)
2093 do addWarn ("Ignoring " ++ flag ++ " as it is incompatible with -fPIC and -dynamic on this platform")
2095 _ -> return $ dflags { hscTarget = l }
2096 | otherwise = return dflags
2097 where platform = targetPlatform dflags
2098 arch = platformArch platform
2099 os = platformOS platform
2100 flag = showHscTargetFlag l
2102 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2103 setOptLevel n dflags
2104 | hscTarget dflags == HscInterpreted && n > 0
2105 = do addWarn "-O conflicts with --interactive; -O ignored."
2108 = return (updOptLevel n dflags)
2111 -- -Odph is equivalent to
2113 -- -O2 optimise as much as possible
2114 -- -fmax-simplifier-iterations20 this is necessary sometimes
2115 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2117 setDPHOpt :: DynFlags -> DynP DynFlags
2118 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2122 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2123 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2124 -- vectoriser cannot be used.
2126 data DPHBackend = DPHPar -- "dph-par"
2127 | DPHSeq -- "dph-seq"
2128 | DPHThis -- the currently compiled package
2129 | DPHNone -- no DPH library available
2130 deriving(Eq, Ord, Enum, Show)
2132 setDPHBackend :: DPHBackend -> DynP ()
2133 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2135 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2137 dphPackageMaybe :: DynFlags -> Maybe PackageId
2138 dphPackageMaybe dflags
2139 = case dphBackend dflags of
2140 DPHPar -> Just dphParPackageId
2141 DPHSeq -> Just dphSeqPackageId
2142 DPHThis -> Just (thisPackage dflags)
2145 setMainIs :: String -> DynP ()
2147 | not (null main_fn) && isLower (head main_fn)
2148 -- The arg looked like "Foo.Bar.baz"
2149 = upd $ \d -> d{ mainFunIs = Just main_fn,
2150 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2152 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2153 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2155 | otherwise -- The arg looked like "baz"
2156 = upd $ \d -> d{ mainFunIs = Just arg }
2158 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2160 -----------------------------------------------------------------------------
2161 -- Paths & Libraries
2163 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2165 -- -i on its own deletes the import paths
2166 addImportPath "" = upd (\s -> s{importPaths = []})
2167 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2170 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2173 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2175 addFrameworkPath p =
2176 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2178 #ifndef mingw32_TARGET_OS
2179 split_marker :: Char
2180 split_marker = ':' -- not configurable (ToDo)
2183 splitPathList :: String -> [String]
2184 splitPathList s = filter notNull (splitUp s)
2185 -- empty paths are ignored: there might be a trailing
2186 -- ':' in the initial list, for example. Empty paths can
2187 -- cause confusion when they are translated into -I options
2188 -- for passing to gcc.
2190 #ifndef mingw32_TARGET_OS
2191 splitUp xs = split split_marker xs
2193 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2195 -- That is, if "foo:bar:baz" is used, this interpreted as
2196 -- consisting of three entries, 'foo', 'bar', 'baz'.
2197 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2198 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2200 -- Notice that no attempt is made to fully replace the 'standard'
2201 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2202 -- that this will cause too much breakage for users & ':' will
2203 -- work fine even with DOS paths, if you're not insisting on being silly.
2206 splitUp (x:':':div:xs) | div `elem` dir_markers
2207 = ((x:':':div:p): splitUp rs)
2209 (p,rs) = findNextPath xs
2210 -- we used to check for existence of the path here, but that
2211 -- required the IO monad to be threaded through the command-line
2212 -- parser which is quite inconvenient. The
2213 splitUp xs = cons p (splitUp rs)
2215 (p,rs) = findNextPath xs
2220 -- will be called either when we've consumed nought or the
2221 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2222 -- finding the next split marker.
2224 case break (`elem` split_markers) xs of
2225 (p, _:ds) -> (p, ds)
2228 split_markers :: [Char]
2229 split_markers = [':', ';']
2231 dir_markers :: [Char]
2232 dir_markers = ['/', '\\']
2235 -- -----------------------------------------------------------------------------
2236 -- tmpDir, where we store temporary files.
2238 setTmpDir :: FilePath -> DynFlags -> DynFlags
2239 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2240 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2241 -- seem necessary now --SDM 7/2/2008
2243 -----------------------------------------------------------------------------
2246 setRtsOpts :: String -> DynP ()
2247 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2249 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2250 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2252 -----------------------------------------------------------------------------
2255 setOptHpcDir :: String -> DynP ()
2256 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2258 -----------------------------------------------------------------------------
2259 -- Via-C compilation stuff
2261 -- There are some options that we need to pass to gcc when compiling
2262 -- Haskell code via C, but are only supported by recent versions of
2263 -- gcc. The configure script decides which of these options we need,
2264 -- and puts them in the "settings" file in $topdir. The advantage of
2265 -- having these in a separate file is that the file can be created at
2266 -- install-time depending on the available gcc version, and even
2267 -- re-generated later if gcc is upgraded.
2269 -- The options below are not dependent on the version of gcc, only the
2272 picCCOpts :: DynFlags -> [String]
2274 #if darwin_TARGET_OS
2275 -- Apple prefers to do things the other way round.
2276 -- PIC is on by default.
2277 -- -mdynamic-no-pic:
2278 -- Turn off PIC code generation.
2280 -- Don't generate "common" symbols - these are unwanted
2281 -- in dynamic libraries.
2284 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2286 = ["-mdynamic-no-pic"]
2287 #elif mingw32_TARGET_OS
2288 -- no -fPIC for Windows
2290 = ["-U __PIC__","-D__PIC__"]
2294 -- we need -fPIC for C files when we are compiling with -dynamic,
2295 -- otherwise things like stub.c files don't get compiled
2296 -- correctly. They need to reference data in the Haskell
2297 -- objects, but can't without -fPIC. See
2298 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2299 | opt_PIC || not opt_Static
2300 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2305 -- -----------------------------------------------------------------------------
2309 can_split = cSupportsSplitObjs == "YES"
2311 -- -----------------------------------------------------------------------------
2314 compilerInfo :: DynFlags -> [(String, String)]
2316 = -- We always make "Project name" be first to keep parsing in
2317 -- other languages simple, i.e. when looking for other fields,
2318 -- you don't have to worry whether there is a leading '[' or not
2319 ("Project name", cProjectName)
2320 -- Next come the settings, so anything else can be overridden
2321 -- in the settings file (as "lookup" uses the first match for the
2323 : rawSettings dflags
2324 ++ [("Project version", cProjectVersion),
2325 ("Booter version", cBooterVersion),
2327 ("Build platform", cBuildPlatformString),
2328 ("Host platform", cHostPlatformString),
2329 ("Target platform", cTargetPlatformString),
2330 ("Have interpreter", cGhcWithInterpreter),
2331 ("Object splitting supported", cSupportsSplitObjs),
2332 ("Have native code generator", cGhcWithNativeCodeGen),
2333 ("Support SMP", cGhcWithSMP),
2334 ("Unregisterised", cGhcUnregisterised),
2335 ("Tables next to code", cGhcEnableTablesNextToCode),
2336 ("RTS ways", cGhcRTSWays),
2337 ("Leading underscore", cLeadingUnderscore),
2338 ("Debug on", show debugIsOn),
2339 ("LibDir", topDir dflags),
2340 ("Global Package DB", systemPackageConfig dflags),
2341 ("Gcc Linker flags", show cGccLinkerOpts),
2342 ("Ld Linker flags", show cLdLinkerOpts)
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