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
278 | Opt_ExcessPrecision
279 | Opt_EagerBlackHoling
280 | Opt_ReadUserPackageConf
284 | Opt_HideAllPackages
285 | Opt_PrintBindResult
289 | Opt_BreakOnException
291 | Opt_PrintEvldWithShow
292 | Opt_PrintBindContents
295 | Opt_EmitExternalCore
297 | Opt_BuildingCabalPackage
305 | Opt_ConvertToZipCfgAndBack
306 | Opt_AutoLinkPackages
307 | Opt_ImplicitImportQualified
315 | Opt_KeepRawTokenStream
320 data Language = Haskell98 | Haskell2010
324 | Opt_OverlappingInstances
325 | Opt_UndecidableInstances
326 | Opt_IncoherentInstances
327 | Opt_MonomorphismRestriction
330 | Opt_RelaxedPolyRec -- Deprecated
331 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
332 | Opt_ForeignFunctionInterface
333 | Opt_UnliftedFFITypes
334 | Opt_GHCForeignImportPrim
335 | Opt_ParallelArrays -- Syntactic support for parallel arrays
336 | Opt_Arrows -- Arrow-notation syntax
337 | Opt_TemplateHaskell
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
361 | Opt_DeriveGeneric -- Allow deriving Generic/1
362 | Opt_DefaultSignatures -- Allow extra signatures for defmeths
363 | Opt_Generics -- Old generic classes, now deprecated
365 | Opt_TypeSynonymInstances
366 | Opt_FlexibleContexts
367 | Opt_FlexibleInstances
368 | Opt_ConstrainedClassMethods
369 | Opt_MultiParamTypeClasses
370 | Opt_FunctionalDependencies
372 | Opt_PolymorphicComponents
373 | Opt_ExistentialQuantification
377 | Opt_ParallelListComp
378 | Opt_TransformListComp
379 | Opt_MonadComprehensions
380 | Opt_GeneralizedNewtypeDeriving
383 | Opt_PostfixOperators
386 | Opt_LiberalTypeSynonyms
389 | Opt_ImpredicativeTypes
393 | Opt_AlternativeLayoutRule
394 | Opt_AlternativeLayoutRuleTransitional
395 | Opt_DatatypeContexts
396 | Opt_NondecreasingIndentation
400 -- | Contains not only a collection of 'DynFlag's but also a plethora of
401 -- information relating to the compilation of a single file or GHC session
402 data DynFlags = DynFlags {
405 hscTarget :: HscTarget,
406 hscOutName :: String, -- ^ Name of the output file
407 extCoreName :: String, -- ^ Name of the .hcr output file
408 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
409 optLevel :: Int, -- ^ Optimisation level
410 simplPhases :: Int, -- ^ Number of simplifier phases
411 maxSimplIterations :: Int, -- ^ Max simplifier iterations
412 shouldDumpSimplPhase :: Maybe String,
413 ruleCheck :: Maybe String,
414 strictnessBefore :: [Int], -- ^ Additional demand analysis
416 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
417 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
418 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
419 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
420 -- See CoreMonad.FloatOutSwitches
422 targetPlatform :: Platform.Platform, -- ^ The platform we're compiling for. Used by the NCG.
423 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
424 importPaths :: [FilePath],
426 mainFunIs :: Maybe String,
427 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
429 dphBackend :: DPHBackend,
431 thisPackage :: PackageId, -- ^ name of package currently being compiled
434 ways :: [Way], -- ^ Way flags from the command line
435 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
436 rtsBuildTag :: String, -- ^ The RTS \"way\"
438 -- For object splitting
439 splitInfo :: Maybe (String,Int),
442 objectDir :: Maybe String,
443 dylibInstallName :: Maybe String,
444 hiDir :: Maybe String,
445 stubDir :: Maybe String,
451 outputFile :: Maybe String,
452 outputHi :: Maybe String,
453 dynLibLoader :: DynLibLoader,
455 -- | This is set by 'DriverPipeline.runPipeline' based on where
456 -- its output is going.
457 dumpPrefix :: Maybe FilePath,
459 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
460 -- Set by @-ddump-file-prefix@
461 dumpPrefixForce :: Maybe FilePath,
463 includePaths :: [String],
464 libraryPaths :: [String],
465 frameworkPaths :: [String], -- used on darwin only
466 cmdlineFrameworks :: [String], -- ditto
468 rtsOpts :: Maybe String,
469 rtsOptsEnabled :: RtsOptsEnabled,
471 hpcDir :: String, -- ^ Path to store the .mix files
473 settings :: Settings,
476 depMakefile :: FilePath,
477 depIncludePkgDeps :: Bool,
478 depExcludeMods :: [ModuleName],
479 depSuffixes :: [String],
482 extraPkgConfs :: [FilePath],
483 -- ^ The @-package-conf@ flags given on the command line, in the order
486 packageFlags :: [PackageFlag],
487 -- ^ The @-package@ and @-hide-package@ flags from the command-line
490 -- NB. do not modify this field, it is calculated by
491 -- Packages.initPackages and Packages.updatePackages.
492 pkgDatabase :: Maybe [PackageConfig],
493 pkgState :: PackageState,
496 -- These have to be IORefs, because the defaultCleanupHandler needs to
497 -- know what to clean when an exception happens
498 filesToClean :: IORef [FilePath],
499 dirsToClean :: IORef (Map FilePath FilePath),
501 -- Names of files which were generated from -ddump-to-file; used to
502 -- track which ones we need to truncate because it's our first run
504 generatedDumps :: IORef (Set FilePath),
508 -- Don't change this without updating extensionFlags:
509 language :: Maybe Language,
510 -- Don't change this without updating extensionFlags:
511 extensions :: [OnOff ExtensionFlag],
512 -- extensionFlags should always be equal to
513 -- flattenExtensionFlags language extensions
514 extensionFlags :: [ExtensionFlag],
516 -- | Message output action: use "ErrUtils" instead of this if you can
517 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
519 haddockOptions :: Maybe String
522 data Settings = Settings {
523 sGhcUsagePath :: FilePath, -- Filled in by SysTools
524 sGhciUsagePath :: FilePath, -- ditto
526 sTmpDir :: String, -- no trailing '/'
527 -- You shouldn't need to look things up in rawSettings directly.
528 -- They should have their own fields instead.
529 sRawSettings :: [(String, String)],
530 sExtraGccViaCFlags :: [String],
531 sSystemPackageConfig :: FilePath,
532 -- commands for particular phases
534 sPgm_P :: (String,[Option]),
536 sPgm_c :: (String,[Option]),
537 sPgm_s :: (String,[Option]),
538 sPgm_a :: (String,[Option]),
539 sPgm_l :: (String,[Option]),
540 sPgm_dll :: (String,[Option]),
542 sPgm_sysman :: String,
543 sPgm_windres :: String,
544 sPgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
545 sPgm_lc :: (String,[Option]), -- LLVM: llc static compiler
546 -- options for particular phases
554 sOpt_windres :: [String],
555 sOpt_lo :: [String], -- LLVM: llvm optimiser
556 sOpt_lc :: [String] -- LLVM: llc static compiler
560 ghcUsagePath :: DynFlags -> FilePath
561 ghcUsagePath dflags = sGhcUsagePath (settings dflags)
562 ghciUsagePath :: DynFlags -> FilePath
563 ghciUsagePath dflags = sGhciUsagePath (settings dflags)
564 topDir :: DynFlags -> FilePath
565 topDir dflags = sTopDir (settings dflags)
566 tmpDir :: DynFlags -> String
567 tmpDir dflags = sTmpDir (settings dflags)
568 rawSettings :: DynFlags -> [(String, String)]
569 rawSettings dflags = sRawSettings (settings dflags)
570 extraGccViaCFlags :: DynFlags -> [String]
571 extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
572 systemPackageConfig :: DynFlags -> FilePath
573 systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
574 pgm_L :: DynFlags -> String
575 pgm_L dflags = sPgm_L (settings dflags)
576 pgm_P :: DynFlags -> (String,[Option])
577 pgm_P dflags = sPgm_P (settings dflags)
578 pgm_F :: DynFlags -> String
579 pgm_F dflags = sPgm_F (settings dflags)
580 pgm_c :: DynFlags -> (String,[Option])
581 pgm_c dflags = sPgm_c (settings dflags)
582 pgm_s :: DynFlags -> (String,[Option])
583 pgm_s dflags = sPgm_s (settings dflags)
584 pgm_a :: DynFlags -> (String,[Option])
585 pgm_a dflags = sPgm_a (settings dflags)
586 pgm_l :: DynFlags -> (String,[Option])
587 pgm_l dflags = sPgm_l (settings dflags)
588 pgm_dll :: DynFlags -> (String,[Option])
589 pgm_dll dflags = sPgm_dll (settings dflags)
590 pgm_T :: DynFlags -> String
591 pgm_T dflags = sPgm_T (settings dflags)
592 pgm_sysman :: DynFlags -> String
593 pgm_sysman dflags = sPgm_sysman (settings dflags)
594 pgm_windres :: DynFlags -> String
595 pgm_windres dflags = sPgm_windres (settings dflags)
596 pgm_lo :: DynFlags -> (String,[Option])
597 pgm_lo dflags = sPgm_lo (settings dflags)
598 pgm_lc :: DynFlags -> (String,[Option])
599 pgm_lc dflags = sPgm_lc (settings dflags)
600 opt_L :: DynFlags -> [String]
601 opt_L dflags = sOpt_L (settings dflags)
602 opt_P :: DynFlags -> [String]
603 opt_P dflags = sOpt_P (settings dflags)
604 opt_F :: DynFlags -> [String]
605 opt_F dflags = sOpt_F (settings dflags)
606 opt_c :: DynFlags -> [String]
607 opt_c dflags = sOpt_c (settings dflags)
608 opt_m :: DynFlags -> [String]
609 opt_m dflags = sOpt_m (settings dflags)
610 opt_a :: DynFlags -> [String]
611 opt_a dflags = sOpt_a (settings dflags)
612 opt_l :: DynFlags -> [String]
613 opt_l dflags = sOpt_l (settings dflags)
614 opt_windres :: DynFlags -> [String]
615 opt_windres dflags = sOpt_windres (settings dflags)
616 opt_lo :: DynFlags -> [String]
617 opt_lo dflags = sOpt_lo (settings dflags)
618 opt_lc :: DynFlags -> [String]
619 opt_lc dflags = sOpt_lc (settings dflags)
621 wayNames :: DynFlags -> [WayName]
622 wayNames = map wayName . ways
624 -- | The target code type of the compilation (if any).
626 -- Whenever you change the target, also make sure to set 'ghcLink' to
627 -- something sensible.
629 -- 'HscNothing' can be used to avoid generating any output, however, note
632 -- * This will not run the desugaring step, thus no warnings generated in
633 -- this step will be output. In particular, this includes warnings related
634 -- to pattern matching. You can run the desugarer manually using
635 -- 'GHC.desugarModule'.
637 -- * If a program uses Template Haskell the typechecker may try to run code
638 -- from an imported module. This will fail if no code has been generated
639 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
640 -- whether this might be the case and choose to either switch to a
641 -- different target or avoid typechecking such modules. (The latter may
642 -- preferable for security reasons.)
645 = HscC -- ^ Generate C code.
646 | HscAsm -- ^ Generate assembly using the native code generator.
647 | HscLlvm -- ^ Generate assembly using the llvm code generator.
648 | HscJava -- ^ Generate Java bytecode.
649 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
650 | HscNothing -- ^ Don't generate any code. See notes above.
653 showHscTargetFlag :: HscTarget -> String
654 showHscTargetFlag HscC = "-fvia-c"
655 showHscTargetFlag HscAsm = "-fasm"
656 showHscTargetFlag HscLlvm = "-fllvm"
657 showHscTargetFlag HscJava = panic "No flag for HscJava"
658 showHscTargetFlag HscInterpreted = "-fbyte-code"
659 showHscTargetFlag HscNothing = "-fno-code"
661 -- | Will this target result in an object file on the disk?
662 isObjectTarget :: HscTarget -> Bool
663 isObjectTarget HscC = True
664 isObjectTarget HscAsm = True
665 isObjectTarget HscLlvm = True
666 isObjectTarget _ = False
668 -- | The 'GhcMode' tells us whether we're doing multi-module
669 -- compilation (controlled via the "GHC" API) or one-shot
670 -- (single-module) compilation. This makes a difference primarily to
671 -- the "Finder": in one-shot mode we look for interface files for
672 -- imported modules, but in multi-module mode we look for source files
673 -- in order to check whether they need to be recompiled.
675 = CompManager -- ^ @\-\-make@, GHCi, etc.
676 | OneShot -- ^ @ghc -c Foo.hs@
677 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
680 instance Outputable GhcMode where
681 ppr CompManager = ptext (sLit "CompManager")
682 ppr OneShot = ptext (sLit "OneShot")
683 ppr MkDepend = ptext (sLit "MkDepend")
685 isOneShot :: GhcMode -> Bool
686 isOneShot OneShot = True
687 isOneShot _other = False
689 -- | What to do in the link step, if there is one.
691 = NoLink -- ^ Don't link at all
692 | LinkBinary -- ^ Link object code into a binary
693 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
694 -- bytecode and object code).
695 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
698 isNoLink :: GhcLink -> Bool
699 isNoLink NoLink = True
702 -- Is it worth evaluating this Bool and caching it in the DynFlags value
703 -- during initDynFlags?
704 doingTickyProfiling :: DynFlags -> Bool
705 doingTickyProfiling _ = opt_Ticky
706 -- XXX -ticky is a static flag, because it implies -debug which is also
707 -- static. If the way flags were made dynamic, we could fix this.
710 = ExposePackage String
711 | ExposePackageId String
713 | IgnorePackage String
716 defaultHscTarget :: HscTarget
717 defaultHscTarget = defaultObjectTarget
719 -- | The 'HscTarget' value corresponding to the default way to create
720 -- object files on the current platform.
721 defaultObjectTarget :: HscTarget
723 | cGhcUnregisterised == "YES" = HscC
724 | cGhcWithNativeCodeGen == "YES" = HscAsm
725 | otherwise = HscLlvm
732 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
735 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
736 initDynFlags :: DynFlags -> IO DynFlags
737 initDynFlags dflags = do
738 -- someday these will be dynamic flags
739 ways <- readIORef v_Ways
740 refFilesToClean <- newIORef []
741 refDirsToClean <- newIORef Map.empty
742 refGeneratedDumps <- newIORef Set.empty
745 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
746 rtsBuildTag = mkBuildTag ways,
747 filesToClean = refFilesToClean,
748 dirsToClean = refDirsToClean,
749 generatedDumps = refGeneratedDumps
752 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
753 -- and must be fully initialized by 'GHC.newSession' first.
754 defaultDynFlags :: Settings -> DynFlags
755 defaultDynFlags mySettings =
757 ghcMode = CompManager,
758 ghcLink = LinkBinary,
759 hscTarget = defaultHscTarget,
765 maxSimplIterations = 4,
766 shouldDumpSimplPhase = Nothing,
768 specConstrThreshold = Just 200,
769 specConstrCount = Just 3,
770 liberateCaseThreshold = Just 200,
771 floatLamArgs = Just 0, -- Default: float only if no fvs
772 strictnessBefore = [],
774 targetPlatform = defaultTargetPlatform,
775 cmdlineHcIncludes = [],
779 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
781 dphBackend = DPHNone,
783 thisPackage = mainPackageId,
786 dylibInstallName = Nothing,
790 objectSuf = phaseInputExt StopLn,
791 hcSuf = phaseInputExt HCc,
794 outputFile = Nothing,
796 dynLibLoader = SystemDependent,
797 dumpPrefix = Nothing,
798 dumpPrefixForce = Nothing,
802 cmdlineFrameworks = [],
804 rtsOptsEnabled = RtsOptsSafeOnly,
810 pkgDatabase = Nothing,
811 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
812 ways = panic "defaultDynFlags: No ways",
813 buildTag = panic "defaultDynFlags: No buildTag",
814 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
816 settings = mySettings,
818 depMakefile = "Makefile",
819 depIncludePkgDeps = False,
822 -- end of ghc -M values
823 filesToClean = panic "defaultDynFlags: No filesToClean",
824 dirsToClean = panic "defaultDynFlags: No dirsToClean",
825 generatedDumps = panic "defaultDynFlags: No generatedDumps",
826 haddockOptions = Nothing,
827 flags = defaultFlags,
830 extensionFlags = flattenExtensionFlags Nothing [],
832 log_action = \severity srcSpan style msg ->
834 SevOutput -> printSDoc msg style
835 SevInfo -> printErrs msg style
836 SevFatal -> printErrs msg style
839 printErrs (mkLocMessage srcSpan msg) style
840 -- careful (#2302): printErrs prints in UTF-8, whereas
841 -- converting to string first and using hPutStr would
842 -- just emit the low 8 bits of each unicode char.
846 Note [Verbosity levels]
847 ~~~~~~~~~~~~~~~~~~~~~~~
848 0 | print errors & warnings only
849 1 | minimal verbosity: print "compiling M ... done." for each module.
850 2 | equivalent to -dshow-passes
851 3 | equivalent to existing "ghc -v"
852 4 | "ghc -v -ddump-most"
853 5 | "ghc -v -ddump-all"
859 -- OnOffs accumulate in reverse order, so we use foldr in order to
860 -- process them in the right order
861 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
863 flattenExtensionFlags ml = foldr f defaultExtensionFlags
864 where f (On f) flags = f : delete f flags
865 f (Off f) flags = delete f flags
866 defaultExtensionFlags = languageExtensions ml
868 languageExtensions :: Maybe Language -> [ExtensionFlag]
870 languageExtensions Nothing
871 -- Nothing => the default case
872 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
873 -- behaviour the default, to see if anyone notices
875 -- In due course I'd like Opt_MonoLocalBinds to be on by default
876 -- But NB it's implied by GADTs etc
877 -- SLPJ September 2010
878 : Opt_NondecreasingIndentation -- This has been on by default for some time
879 : languageExtensions (Just Haskell2010)
881 languageExtensions (Just Haskell98)
882 = [Opt_ImplicitPrelude,
883 Opt_MonomorphismRestriction,
885 Opt_DatatypeContexts,
886 Opt_NondecreasingIndentation
887 -- strictly speaking non-standard, but we always had this
888 -- on implicitly before the option was added in 7.1, and
889 -- turning it off breaks code, so we're keeping it on for
890 -- backwards compatibility. Cabal uses -XHaskell98 by
891 -- default unless you specify another language.
894 languageExtensions (Just Haskell2010)
895 = [Opt_ImplicitPrelude,
896 Opt_MonomorphismRestriction,
897 Opt_DatatypeContexts,
899 Opt_ForeignFunctionInterface,
904 -- | Test whether a 'DynFlag' is set
905 dopt :: DynFlag -> DynFlags -> Bool
906 dopt f dflags = f `elem` (flags dflags)
909 dopt_set :: DynFlags -> DynFlag -> DynFlags
910 dopt_set dfs f = dfs{ flags = f : flags dfs }
912 -- | Unset a 'DynFlag'
913 dopt_unset :: DynFlags -> DynFlag -> DynFlags
914 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
916 -- | Test whether a 'ExtensionFlag' is set
917 xopt :: ExtensionFlag -> DynFlags -> Bool
918 xopt f dflags = f `elem` extensionFlags dflags
920 -- | Set a 'ExtensionFlag'
921 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
923 = let onoffs = On f : extensions dfs
924 in dfs { extensions = onoffs,
925 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
927 -- | Unset a 'ExtensionFlag'
928 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
930 = let onoffs = Off f : extensions dfs
931 in dfs { extensions = onoffs,
932 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
934 setLanguage :: Language -> DynP ()
935 setLanguage l = upd f
936 where f dfs = let mLang = Just l
937 oneoffs = extensions dfs
940 extensionFlags = flattenExtensionFlags mLang oneoffs
943 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
944 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
945 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
946 -> [a] -- ^ Correctly ordered extracted options
947 getOpts dflags opts = reverse (opts dflags)
948 -- We add to the options from the front, so we need to reverse the list
950 -- | Gets the verbosity flag for the current verbosity level. This is fed to
951 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
952 getVerbFlags :: DynFlags -> [String]
954 | verbosity dflags >= 4 = ["-v"]
957 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
958 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
959 setPgmP, addOptl, addOptP,
960 addCmdlineFramework, addHaddockOpts
961 :: String -> DynFlags -> DynFlags
962 setOutputFile, setOutputHi, setDumpPrefixForce
963 :: Maybe String -> DynFlags -> DynFlags
965 setObjectDir f d = d{ objectDir = Just f}
966 setHiDir f d = d{ hiDir = Just f}
967 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
968 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
969 -- \#included from the .hc file when compiling via C (i.e. unregisterised
971 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
972 setDylibInstallName f d = d{ dylibInstallName = Just f}
974 setObjectSuf f d = d{ objectSuf = f}
975 setHiSuf f d = d{ hiSuf = f}
976 setHcSuf f d = d{ hcSuf = f}
978 setOutputFile f d = d{ outputFile = f}
979 setOutputHi f d = d{ outputHi = f}
981 parseDynLibLoaderMode f d =
983 ("deploy", "") -> d{ dynLibLoader = Deployable }
984 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
985 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
987 setDumpPrefixForce f d = d { dumpPrefixForce = f}
989 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
990 -- Config.hs should really use Option.
991 setPgmP f = let (pgm:args) = words f in alterSettings (\s -> s { sPgm_P = (pgm, map Option args)})
992 addOptl f = alterSettings (\s -> s { sOpt_l = f : sOpt_l s})
993 addOptP f = alterSettings (\s -> s { sOpt_P = f : sOpt_P s})
996 setDepMakefile :: FilePath -> DynFlags -> DynFlags
997 setDepMakefile f d = d { depMakefile = deOptDep f }
999 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
1000 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
1002 addDepExcludeMod :: String -> DynFlags -> DynFlags
1003 addDepExcludeMod m d
1004 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
1006 addDepSuffix :: FilePath -> DynFlags -> DynFlags
1007 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
1010 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
1011 -- we need to strip the "-optdep" off of the arg
1012 deOptDep :: String -> String
1013 deOptDep x = case stripPrefix "-optdep" x of
1017 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
1019 addHaddockOpts f d = d{ haddockOptions = Just f}
1021 -- -----------------------------------------------------------------------------
1022 -- Command-line options
1024 -- | When invoking external tools as part of the compilation pipeline, we
1025 -- pass these a sequence of options on the command-line. Rather than
1026 -- just using a list of Strings, we use a type that allows us to distinguish
1027 -- between filepaths and 'other stuff'. The reason for this is that
1028 -- this type gives us a handle on transforming filenames, and filenames only,
1029 -- to whatever format they're expected to be on a particular platform.
1031 = FileOption -- an entry that _contains_ filename(s) / filepaths.
1032 String -- a non-filepath prefix that shouldn't be
1033 -- transformed (e.g., "/out=")
1034 String -- the filepath/filename portion
1037 showOpt :: Option -> String
1038 showOpt (FileOption pre f) = pre ++ f
1039 showOpt (Option s) = s
1041 -----------------------------------------------------------------------------
1042 -- Setting the optimisation level
1044 updOptLevel :: Int -> DynFlags -> DynFlags
1045 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
1047 = dfs2{ optLevel = final_n }
1049 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
1050 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
1051 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
1053 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
1054 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
1056 -- -----------------------------------------------------------------------------
1057 -- StgToDo: abstraction of stg-to-stg passes to run.
1060 = StgDoMassageForProfiling -- should be (next to) last
1061 -- There's also setStgVarInfo, but its absolute "lastness"
1062 -- is so critical that it is hardwired in (no flag).
1065 getStgToDo :: DynFlags -> [StgToDo]
1069 stg_stats = dopt Opt_StgStats dflags
1071 todo1 = if stg_stats then [D_stg_stats] else []
1073 todo2 | WayProf `elem` wayNames dflags
1074 = StgDoMassageForProfiling : todo1
1078 {- **********************************************************************
1082 %********************************************************************* -}
1084 -- -----------------------------------------------------------------------------
1085 -- Parsing the dynamic flags.
1087 -- | Parse dynamic flags from a list of command line arguments. Returns the
1088 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1089 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1090 -- flags or missing arguments).
1091 parseDynamicFlags :: Monad m =>
1092 DynFlags -> [Located String]
1093 -> m (DynFlags, [Located String], [Located String])
1094 -- ^ Updated 'DynFlags', left-over arguments, and
1095 -- list of warnings.
1096 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1098 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1099 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1100 parseDynamicNoPackageFlags :: Monad m =>
1101 DynFlags -> [Located String]
1102 -> m (DynFlags, [Located String], [Located String])
1103 -- ^ Updated 'DynFlags', left-over arguments, and
1104 -- list of warnings.
1105 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1107 parseDynamicFlags_ :: Monad m =>
1108 DynFlags -> [Located String] -> Bool
1109 -> m (DynFlags, [Located String], [Located String])
1110 parseDynamicFlags_ dflags0 args pkg_flags = do
1111 -- XXX Legacy support code
1112 -- We used to accept things like
1113 -- optdep-f -optdepdepend
1114 -- optdep-f -optdep depend
1115 -- optdep -f -optdepdepend
1116 -- optdep -f -optdep depend
1117 -- but the spaces trip up proper argument handling. So get rid of them.
1118 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1119 f (x : xs) = x : f xs
1123 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1124 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1125 | otherwise = dynamic_flags
1127 let ((leftover, errs, warns), dflags1)
1128 = runCmdLine (processArgs flag_spec args') dflags0
1129 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1131 return (dflags1, leftover, warns)
1134 {- **********************************************************************
1136 DynFlags specifications
1138 %********************************************************************* -}
1140 allFlags :: [String]
1141 allFlags = map ('-':) $
1142 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1143 map ("fno-"++) flags ++
1144 map ("f"++) flags ++
1145 map ("f"++) flags' ++
1146 map ("X"++) supportedExtensions
1147 where ok (PrefixPred _ _) = False
1149 flags = [ name | (name, _, _) <- fFlags ]
1150 flags' = [ name | (name, _, _) <- fLangFlags ]
1152 --------------- The main flags themselves ------------------
1153 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1155 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1156 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1157 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1159 (HasArg (\s -> do { addCmdlineHCInclude s
1160 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1161 , Flag "v" (OptIntSuffix setVerbosity)
1163 ------- Specific phases --------------------------------------------
1164 -- need to appear before -pgmL to be parsed as LLVM flags.
1165 , Flag "pgmlo" (hasArg (\f -> alterSettings (\s -> s { sPgm_lo = (f,[])})))
1166 , Flag "pgmlc" (hasArg (\f -> alterSettings (\s -> s { sPgm_lc = (f,[])})))
1167 , Flag "pgmL" (hasArg (\f -> alterSettings (\s -> s { sPgm_L = f})))
1168 , Flag "pgmP" (hasArg setPgmP)
1169 , Flag "pgmF" (hasArg (\f -> alterSettings (\s -> s { sPgm_F = f})))
1170 , Flag "pgmc" (hasArg (\f -> alterSettings (\s -> s { sPgm_c = (f,[])})))
1171 , Flag "pgmm" (HasArg (\_ -> addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1172 , Flag "pgms" (hasArg (\f -> alterSettings (\s -> s { sPgm_s = (f,[])})))
1173 , Flag "pgma" (hasArg (\f -> alterSettings (\s -> s { sPgm_a = (f,[])})))
1174 , Flag "pgml" (hasArg (\f -> alterSettings (\s -> s { sPgm_l = (f,[])})))
1175 , Flag "pgmdll" (hasArg (\f -> alterSettings (\s -> s { sPgm_dll = (f,[])})))
1176 , Flag "pgmwindres" (hasArg (\f -> alterSettings (\s -> s { sPgm_windres = f})))
1178 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1179 , Flag "optlo" (hasArg (\f -> alterSettings (\s -> s { sOpt_lo = f : sOpt_lo s})))
1180 , Flag "optlc" (hasArg (\f -> alterSettings (\s -> s { sOpt_lc = f : sOpt_lc s})))
1181 , Flag "optL" (hasArg (\f -> alterSettings (\s -> s { sOpt_L = f : sOpt_L s})))
1182 , Flag "optP" (hasArg addOptP)
1183 , Flag "optF" (hasArg (\f -> alterSettings (\s -> s { sOpt_F = f : sOpt_F s})))
1184 , Flag "optc" (hasArg (\f -> alterSettings (\s -> s { sOpt_c = f : sOpt_c s})))
1185 , Flag "optm" (hasArg (\f -> alterSettings (\s -> s { sOpt_m = f : sOpt_m s})))
1186 , Flag "opta" (hasArg (\f -> alterSettings (\s -> s { sOpt_a = f : sOpt_a s})))
1187 , Flag "optl" (hasArg addOptl)
1188 , Flag "optwindres" (hasArg (\f -> alterSettings (\s -> s { sOpt_windres = f : sOpt_windres s})))
1191 (NoArg (if can_split
1192 then setDynFlag Opt_SplitObjs
1193 else addWarn "ignoring -fsplit-objs"))
1195 -------- ghc -M -----------------------------------------------------
1196 , Flag "dep-suffix" (hasArg addDepSuffix)
1197 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1198 , Flag "dep-makefile" (hasArg setDepMakefile)
1199 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1200 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1201 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1202 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1203 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1204 , Flag "exclude-module" (hasArg addDepExcludeMod)
1205 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1206 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1208 -------- Linking ----------------------------------------------------
1209 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1210 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1211 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1212 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1214 ------- Libraries ---------------------------------------------------
1215 , Flag "L" (Prefix addLibraryPath)
1216 , Flag "l" (hasArg (addOptl . ("-l" ++)))
1218 ------- Frameworks --------------------------------------------------
1219 -- -framework-path should really be -F ...
1220 , Flag "framework-path" (HasArg addFrameworkPath)
1221 , Flag "framework" (hasArg addCmdlineFramework)
1223 ------- Output Redirection ------------------------------------------
1224 , Flag "odir" (hasArg setObjectDir)
1225 , Flag "o" (SepArg (upd . setOutputFile . Just))
1226 , Flag "ohi" (hasArg (setOutputHi . Just ))
1227 , Flag "osuf" (hasArg setObjectSuf)
1228 , Flag "hcsuf" (hasArg setHcSuf)
1229 , Flag "hisuf" (hasArg setHiSuf)
1230 , Flag "hidir" (hasArg setHiDir)
1231 , Flag "tmpdir" (hasArg setTmpDir)
1232 , Flag "stubdir" (hasArg setStubDir)
1233 , Flag "outputdir" (hasArg setOutputDir)
1234 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1236 ------- Keeping temporary files -------------------------------------
1237 -- These can be singular (think ghc -c) or plural (think ghc --make)
1238 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1239 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1240 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1241 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1242 , Flag "keep-raw-s-file" (NoArg (addWarn "The -keep-raw-s-file flag does nothing; it will be removed in a future GHC release"))
1243 , Flag "keep-raw-s-files" (NoArg (addWarn "The -keep-raw-s-files flag does nothing; it will be removed in a future GHC release"))
1244 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1245 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1246 -- This only makes sense as plural
1247 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1249 ------- Miscellaneous ----------------------------------------------
1250 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1251 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1252 , Flag "with-rtsopts" (HasArg setRtsOpts)
1253 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1254 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1255 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1256 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1257 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1258 , Flag "main-is" (SepArg setMainIs)
1259 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1260 , Flag "haddock-opts" (hasArg addHaddockOpts)
1261 , Flag "hpcdir" (SepArg setOptHpcDir)
1263 ------- recompilation checker --------------------------------------
1264 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1265 ; deprecate "Use -fno-force-recomp instead" }))
1266 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1267 ; deprecate "Use -fforce-recomp instead" }))
1269 ------ HsCpp opts ---------------------------------------------------
1270 , Flag "D" (AnySuffix (upd . addOptP))
1271 , Flag "U" (AnySuffix (upd . addOptP))
1273 ------- Include/Import Paths ----------------------------------------
1274 , Flag "I" (Prefix addIncludePath)
1275 , Flag "i" (OptPrefix addImportPath)
1277 ------ Debugging ----------------------------------------------------
1278 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1280 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1281 , Flag "ddump-raw-cmm" (setDumpFlag Opt_D_dump_raw_cmm)
1282 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1283 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1284 , Flag "ddump-cmmz-cbe" (setDumpFlag Opt_D_dump_cmmz_cbe)
1285 , Flag "ddump-cmmz-spills" (setDumpFlag Opt_D_dump_cmmz_spills)
1286 , Flag "ddump-cmmz-proc" (setDumpFlag Opt_D_dump_cmmz_proc)
1287 , Flag "ddump-cmmz-rewrite" (setDumpFlag Opt_D_dump_cmmz_rewrite)
1288 , Flag "ddump-cmmz-dead" (setDumpFlag Opt_D_dump_cmmz_dead)
1289 , Flag "ddump-cmmz-stub" (setDumpFlag Opt_D_dump_cmmz_stub)
1290 , Flag "ddump-cmmz-sp" (setDumpFlag Opt_D_dump_cmmz_sp)
1291 , Flag "ddump-cmmz-procmap" (setDumpFlag Opt_D_dump_cmmz_procmap)
1292 , Flag "ddump-cmmz-split" (setDumpFlag Opt_D_dump_cmmz_split)
1293 , Flag "ddump-cmmz-lower" (setDumpFlag Opt_D_dump_cmmz_lower)
1294 , Flag "ddump-cmmz-info" (setDumpFlag Opt_D_dump_cmmz_info)
1295 , Flag "ddump-cmmz-cafs" (setDumpFlag Opt_D_dump_cmmz_cafs)
1296 , Flag "ddump-core-stats" (setDumpFlag Opt_D_dump_core_stats)
1297 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1298 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1299 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1300 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1301 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1302 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1303 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1304 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1305 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1306 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1307 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1308 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1309 ; setDumpFlag' Opt_D_dump_llvm}))
1310 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1311 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1312 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1313 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1314 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1315 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1316 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1317 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1318 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1319 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1320 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1321 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1322 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1323 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1324 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1325 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1326 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1327 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1328 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1329 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1330 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1331 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1332 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1333 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1334 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1335 , Flag "ddump-cs-trace" (setDumpFlag Opt_D_dump_cs_trace)
1336 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1337 , Flag "ddump-vt-trace" (setDumpFlag Opt_D_dump_vt_trace)
1338 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1339 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1340 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1341 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1342 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1343 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1344 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1345 ; setVerboseCore2Core }))
1346 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1347 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1348 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1349 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1350 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1351 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1352 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1353 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1354 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1355 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1356 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1357 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1358 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1359 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1360 , Flag "dshow-passes" (NoArg (do forceRecompile
1361 setVerbosity (Just 2)))
1362 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1364 ------ Machine dependant (-m<blah>) stuff ---------------------------
1366 , Flag "monly-2-regs" (NoArg (addWarn "The -monly-2-regs flag does nothing; it will be removed in a future GHC release"))
1367 , Flag "monly-3-regs" (NoArg (addWarn "The -monly-3-regs flag does nothing; it will be removed in a future GHC release"))
1368 , Flag "monly-4-regs" (NoArg (addWarn "The -monly-4-regs flag does nothing; it will be removed in a future GHC release"))
1369 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1371 ------ Warning opts -------------------------------------------------
1372 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1373 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1374 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1375 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1376 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1377 ; deprecate "Use -w instead" }))
1378 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1380 ------ Optimisation flags ------------------------------------------
1381 , Flag "O" (noArgM (setOptLevel 1))
1382 , Flag "Onot" (noArgM (\dflags -> do deprecate "Use -O0 instead"
1383 setOptLevel 0 dflags))
1384 , Flag "Odph" (noArgM setDPHOpt)
1385 , Flag "O" (optIntSuffixM (\mb_n -> setOptLevel (mb_n `orElse` 1)))
1386 -- If the number is missing, use 1
1388 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1389 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1390 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1391 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1392 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1393 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1394 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1395 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1396 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1397 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1398 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1399 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1400 , Flag "ffloat-all-lams" (noArg (\d -> d{ floatLamArgs = Nothing }))
1402 ------ Profiling ----------------------------------------------------
1404 -- XXX Should the -f* flags be deprecated?
1405 -- They don't seem to be documented
1406 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1407 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1408 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1409 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1410 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1411 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1412 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1413 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1414 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1416 ------ DPH flags ----------------------------------------------------
1418 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1419 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1420 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1421 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1423 ------ Compiler flags -----------------------------------------------
1425 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1426 , Flag "fvia-c" (NoArg
1427 (addWarn "The -fvia-c flag does nothing; it will be removed in a future GHC release"))
1428 , Flag "fvia-C" (NoArg
1429 (addWarn "The -fvia-C flag does nothing; it will be removed in a future GHC release"))
1430 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1432 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1433 setTarget HscNothing))
1434 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1435 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1436 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1437 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1439 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1440 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1441 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1442 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1443 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1444 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1445 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1447 package_flags :: [Flag (CmdLineP DynFlags)]
1449 ------- Packages ----------------------------------------------------
1450 Flag "package-conf" (HasArg extraPkgConf_)
1451 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1452 , Flag "package-name" (hasArg setPackageName)
1453 , Flag "package-id" (HasArg exposePackageId)
1454 , Flag "package" (HasArg exposePackage)
1455 , Flag "hide-package" (HasArg hidePackage)
1456 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1457 , Flag "ignore-package" (HasArg ignorePackage)
1458 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1459 ; deprecate "Use -package instead" }))
1462 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1463 -- False <=> we are turning the flag off
1464 turnOn :: TurnOnFlag; turnOn = True
1465 turnOff :: TurnOnFlag; turnOff = False
1468 = ( String -- Flag in string form
1469 , flag -- Flag in internal form
1470 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1471 -- Typically, emit a warning or error
1473 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1474 -> String -- ^ The flag prefix
1475 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1476 -> FlagSpec flag -- ^ Specification of this particular flag
1477 -> Flag (CmdLineP DynFlags)
1478 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1479 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1481 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1482 deprecatedForExtension lang turn_on
1483 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1485 flag | turn_on = lang
1486 | otherwise = "No"++lang
1488 useInstead :: String -> TurnOnFlag -> DynP ()
1489 useInstead flag turn_on
1490 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1492 no = if turn_on then "" else "no-"
1494 nop :: TurnOnFlag -> DynP ()
1497 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1498 fFlags :: [FlagSpec DynFlag]
1500 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1501 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1502 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1503 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1504 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1505 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1506 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1507 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1508 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1509 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1510 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1511 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1512 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1513 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1514 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1515 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1516 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1517 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1518 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1519 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1520 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1521 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1522 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1523 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1524 ( "warn-orphans", Opt_WarnOrphans, nop ),
1525 ( "warn-identities", Opt_WarnIdentities, nop ),
1526 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1527 ( "warn-tabs", Opt_WarnTabs, nop ),
1528 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1529 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1530 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1531 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1532 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1533 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1534 ( "strictness", Opt_Strictness, nop ),
1535 ( "specialise", Opt_Specialise, nop ),
1536 ( "float-in", Opt_FloatIn, nop ),
1537 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1538 ( "full-laziness", Opt_FullLaziness, nop ),
1539 ( "liberate-case", Opt_LiberateCase, nop ),
1540 ( "spec-constr", Opt_SpecConstr, nop ),
1541 ( "cse", Opt_CSE, nop ),
1542 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1543 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1544 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1545 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1546 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1547 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1548 ( "case-merge", Opt_CaseMerge, nop ),
1549 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1550 ( "method-sharing", Opt_MethodSharing,
1551 \_ -> deprecate "doesn't do anything any more"),
1552 -- Remove altogether in GHC 7.2
1553 ( "dicts-cheap", Opt_DictsCheap, nop ),
1554 ( "excess-precision", Opt_ExcessPrecision, nop ),
1555 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1556 ( "print-bind-result", Opt_PrintBindResult, nop ),
1557 ( "force-recomp", Opt_ForceRecomp, nop ),
1558 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1559 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1560 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1561 ( "break-on-exception", Opt_BreakOnException, nop ),
1562 ( "break-on-error", Opt_BreakOnError, nop ),
1563 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1564 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1565 ( "run-cps", Opt_RunCPS, nop ),
1566 ( "run-cpsz", Opt_RunCPSZ, nop ),
1567 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1568 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1569 ( "vectorise", Opt_Vectorise, nop ),
1570 ( "regs-graph", Opt_RegsGraph, nop ),
1571 ( "regs-iterative", Opt_RegsIterative, nop ),
1572 ( "gen-manifest", Opt_GenManifest, nop ),
1573 ( "embed-manifest", Opt_EmbedManifest, nop ),
1574 ( "ext-core", Opt_EmitExternalCore, nop ),
1575 ( "shared-implib", Opt_SharedImplib, nop ),
1576 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1577 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1578 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1579 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1582 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1583 fLangFlags :: [FlagSpec ExtensionFlag]
1585 ( "th", Opt_TemplateHaskell,
1586 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1587 ( "fi", Opt_ForeignFunctionInterface,
1588 deprecatedForExtension "ForeignFunctionInterface" ),
1589 ( "ffi", Opt_ForeignFunctionInterface,
1590 deprecatedForExtension "ForeignFunctionInterface" ),
1591 ( "arrows", Opt_Arrows,
1592 deprecatedForExtension "Arrows" ),
1593 ( "generics", Opt_Generics,
1594 deprecatedForExtension "Generics" ),
1595 ( "implicit-prelude", Opt_ImplicitPrelude,
1596 deprecatedForExtension "ImplicitPrelude" ),
1597 ( "bang-patterns", Opt_BangPatterns,
1598 deprecatedForExtension "BangPatterns" ),
1599 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1600 deprecatedForExtension "MonomorphismRestriction" ),
1601 ( "mono-pat-binds", Opt_MonoPatBinds,
1602 deprecatedForExtension "MonoPatBinds" ),
1603 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1604 deprecatedForExtension "ExtendedDefaultRules" ),
1605 ( "implicit-params", Opt_ImplicitParams,
1606 deprecatedForExtension "ImplicitParams" ),
1607 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1608 deprecatedForExtension "ScopedTypeVariables" ),
1609 ( "parr", Opt_ParallelArrays,
1610 deprecatedForExtension "ParallelArrays" ),
1611 ( "PArr", Opt_ParallelArrays,
1612 deprecatedForExtension "ParallelArrays" ),
1613 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1614 deprecatedForExtension "OverlappingInstances" ),
1615 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1616 deprecatedForExtension "UndecidableInstances" ),
1617 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1618 deprecatedForExtension "IncoherentInstances" )
1621 supportedLanguages :: [String]
1622 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1624 supportedExtensions :: [String]
1625 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1627 supportedLanguagesAndExtensions :: [String]
1628 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1630 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1631 languageFlags :: [FlagSpec Language]
1633 ( "Haskell98", Haskell98, nop ),
1634 ( "Haskell2010", Haskell2010, nop )
1637 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1638 xFlags :: [FlagSpec ExtensionFlag]
1640 ( "CPP", Opt_Cpp, nop ),
1641 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1642 ( "TupleSections", Opt_TupleSections, nop ),
1643 ( "PatternGuards", Opt_PatternGuards, nop ),
1644 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1645 ( "MagicHash", Opt_MagicHash, nop ),
1646 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1647 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1648 ( "KindSignatures", Opt_KindSignatures, nop ),
1649 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1650 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1651 ( "TransformListComp", Opt_TransformListComp, nop ),
1652 ( "MonadComprehensions", Opt_MonadComprehensions, nop),
1653 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1654 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1655 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1656 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1657 ( "Rank2Types", Opt_Rank2Types, nop ),
1658 ( "RankNTypes", Opt_RankNTypes, nop ),
1659 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1660 ( "TypeOperators", Opt_TypeOperators, nop ),
1661 ( "RecursiveDo", Opt_RecursiveDo, -- Enables 'mdo'
1662 deprecatedForExtension "DoRec"),
1663 ( "DoRec", Opt_DoRec, nop ), -- Enables 'rec' keyword
1664 ( "Arrows", Opt_Arrows, nop ),
1665 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1666 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1667 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1668 ( "Generics", Opt_Generics,
1669 \ _ -> deprecate "it does nothing; look into -XDefaultSignatures and -XDeriveGeneric for generic programming support." ),
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 ( "DeriveGeneric", Opt_DeriveGeneric, nop ),
1712 ( "DefaultSignatures", Opt_DefaultSignatures, nop ),
1713 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1714 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1715 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1716 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1717 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1718 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1719 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1720 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1721 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1722 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1723 ( "PackageImports", Opt_PackageImports, nop )
1726 defaultFlags :: [DynFlag]
1728 = [ Opt_AutoLinkPackages,
1729 Opt_ReadUserPackageConf,
1733 #if GHC_DEFAULT_NEW_CODEGEN
1739 Opt_PrintBindContents,
1744 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1745 -- The default -O0 options
1749 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1751 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1752 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1753 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1754 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1755 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1756 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1757 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1758 , (Opt_FunctionalDependencies, turnOn, Opt_MultiParamTypeClasses)
1760 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1762 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1763 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1764 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1766 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1767 -- all over the place
1769 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1771 -- Record wild-cards implies field disambiguation
1772 -- Otherwise if you write (C {..}) you may well get
1773 -- stuff like " 'a' not in scope ", which is a bit silly
1774 -- if the compiler has just filled in field 'a' of constructor 'C'
1775 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1777 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1780 optLevelFlags :: [([Int], DynFlag)]
1782 = [ ([0], Opt_IgnoreInterfacePragmas)
1783 , ([0], Opt_OmitInterfacePragmas)
1785 , ([1,2], Opt_IgnoreAsserts)
1786 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1788 , ([1,2], Opt_DoEtaReduction)
1789 , ([1,2], Opt_CaseMerge)
1790 , ([1,2], Opt_Strictness)
1792 , ([1,2], Opt_FullLaziness)
1793 , ([1,2], Opt_Specialise)
1794 , ([1,2], Opt_FloatIn)
1796 , ([2], Opt_LiberateCase)
1797 , ([2], Opt_SpecConstr)
1798 , ([2], Opt_RegsGraph)
1800 -- , ([2], Opt_StaticArgumentTransformation)
1801 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1802 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1803 -- several improvements to the heuristics, and I'm concerned that without
1804 -- those changes SAT will interfere with some attempts to write "high
1805 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1806 -- this year. In particular, the version in HEAD lacks the tail call
1807 -- criterion, so many things that look like reasonable loops will be
1808 -- turned into functions with extra (unneccesary) thunk creation.
1810 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1811 -- This one is important for a tiresome reason:
1812 -- we want to make sure that the bindings for data
1813 -- constructors are eta-expanded. This is probably
1814 -- a good thing anyway, but it seems fragile.
1817 -- -----------------------------------------------------------------------------
1818 -- Standard sets of warning options
1820 standardWarnings :: [DynFlag]
1822 = [ Opt_WarnWarningsDeprecations,
1823 Opt_WarnDeprecatedFlags,
1824 Opt_WarnUnrecognisedPragmas,
1825 Opt_WarnOverlappingPatterns,
1826 Opt_WarnMissingFields,
1827 Opt_WarnMissingMethods,
1828 Opt_WarnDuplicateExports,
1829 Opt_WarnLazyUnliftedBindings,
1830 Opt_WarnDodgyForeignImports,
1831 Opt_WarnWrongDoBind,
1832 Opt_WarnAlternativeLayoutRuleTransitional
1835 minusWOpts :: [DynFlag]
1836 -- Things you get with -W
1838 = standardWarnings ++
1839 [ Opt_WarnUnusedBinds,
1840 Opt_WarnUnusedMatches,
1841 Opt_WarnUnusedImports,
1842 Opt_WarnIncompletePatterns,
1843 Opt_WarnDodgyExports,
1844 Opt_WarnDodgyImports
1847 minusWallOpts :: [DynFlag]
1848 -- Things you get with -Wall
1851 [ Opt_WarnTypeDefaults,
1852 Opt_WarnNameShadowing,
1853 Opt_WarnMissingSigs,
1856 Opt_WarnUnusedDoBind
1859 minuswRemovesOpts :: [DynFlag]
1860 -- minuswRemovesOpts should be every warning option
1864 Opt_WarnIncompletePatternsRecUpd,
1865 Opt_WarnIncompleteUniPatterns,
1866 Opt_WarnMonomorphism,
1867 Opt_WarnUnrecognisedPragmas,
1868 Opt_WarnAutoOrphans,
1869 Opt_WarnImplicitPrelude
1872 enableGlasgowExts :: DynP ()
1873 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1874 mapM_ setExtensionFlag glasgowExtsFlags
1876 disableGlasgowExts :: DynP ()
1877 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1878 mapM_ unSetExtensionFlag glasgowExtsFlags
1880 glasgowExtsFlags :: [ExtensionFlag]
1881 glasgowExtsFlags = [
1882 Opt_ForeignFunctionInterface
1883 , Opt_UnliftedFFITypes
1884 , Opt_ImplicitParams
1885 , Opt_ScopedTypeVariables
1887 , Opt_TypeSynonymInstances
1888 , Opt_StandaloneDeriving
1889 , Opt_DeriveDataTypeable
1891 , Opt_DeriveFoldable
1892 , Opt_DeriveTraversable
1894 , Opt_FlexibleContexts
1895 , Opt_FlexibleInstances
1896 , Opt_ConstrainedClassMethods
1897 , Opt_MultiParamTypeClasses
1898 , Opt_FunctionalDependencies
1900 , Opt_PolymorphicComponents
1901 , Opt_ExistentialQuantification
1903 , Opt_PostfixOperators
1905 , Opt_LiberalTypeSynonyms
1909 , Opt_ParallelListComp
1910 , Opt_EmptyDataDecls
1911 , Opt_KindSignatures
1912 , Opt_GeneralizedNewtypeDeriving ]
1915 -- Consult the RTS to find whether GHC itself has been built profiled
1916 -- If so, you can't use Template Haskell
1917 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1919 rtsIsProfiled :: Bool
1920 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1923 checkTemplateHaskellOk :: Bool -> DynP ()
1925 checkTemplateHaskellOk turn_on
1926 | turn_on && rtsIsProfiled
1927 = addErr "You can't use Template Haskell with a profiled compiler"
1931 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1932 -- so we simply say "ok". It doesn't matter because TH isn't
1933 -- available in stage 1 anyway.
1934 checkTemplateHaskellOk _ = return ()
1937 {- **********************************************************************
1939 DynFlags constructors
1941 %********************************************************************* -}
1943 type DynP = EwM (CmdLineP DynFlags)
1945 upd :: (DynFlags -> DynFlags) -> DynP ()
1946 upd f = liftEwM (do dflags <- getCmdLineState
1947 putCmdLineState $! f dflags)
1949 updM :: (DynFlags -> DynP DynFlags) -> DynP ()
1950 updM f = do dflags <- liftEwM getCmdLineState
1952 liftEwM $ putCmdLineState $! dflags'
1954 --------------- Constructor functions for OptKind -----------------
1955 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1956 noArg fn = NoArg (upd fn)
1958 noArgM :: (DynFlags -> DynP DynFlags) -> OptKind (CmdLineP DynFlags)
1959 noArgM fn = NoArg (updM fn)
1961 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1962 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1964 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1965 hasArg fn = HasArg (upd . fn)
1967 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1968 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1969 ; deprecate deprec })
1971 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1972 intSuffix fn = IntSuffix (\n -> upd (fn n))
1974 optIntSuffixM :: (Maybe Int -> DynFlags -> DynP DynFlags)
1975 -> OptKind (CmdLineP DynFlags)
1976 optIntSuffixM fn = OptIntSuffix (\mi -> updM (fn mi))
1978 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1979 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1981 --------------------------
1982 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1983 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1984 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1986 --------------------------
1987 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1988 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1991 deps = [ if turn_on then setExtensionFlag d
1992 else unSetExtensionFlag d
1993 | (f', turn_on, d) <- impliedFlags, f' == f ]
1994 -- When you set f, set the ones it implies
1995 -- NB: use setExtensionFlag recursively, in case the implied flags
1996 -- implies further flags
1998 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1999 -- When you un-set f, however, we don't un-set the things it implies
2000 -- (except for -fno-glasgow-exts, which is treated specially)
2002 --------------------------
2003 alterSettings :: (Settings -> Settings) -> DynFlags -> DynFlags
2004 alterSettings f dflags = dflags { settings = f (settings dflags) }
2006 --------------------------
2007 setDumpFlag' :: DynFlag -> DynP ()
2008 setDumpFlag' dump_flag
2009 = do { setDynFlag dump_flag
2010 ; when want_recomp forceRecompile }
2012 -- Certain dumpy-things are really interested in what's going
2013 -- on during recompilation checking, so in those cases we
2014 -- don't want to turn it off.
2015 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
2016 Opt_D_dump_hi_diffs]
2018 forceRecompile :: DynP ()
2019 -- Whenver we -ddump, force recompilation (by switching off the
2020 -- recompilation checker), else you don't see the dump! However,
2021 -- don't switch it off in --make mode, else *everything* gets
2022 -- recompiled which probably isn't what you want
2023 forceRecompile = do { dfs <- liftEwM getCmdLineState
2024 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
2026 force_recomp dfs = isOneShot (ghcMode dfs)
2028 setVerboseCore2Core :: DynP ()
2029 setVerboseCore2Core = do forceRecompile
2030 setDynFlag Opt_D_verbose_core2core
2031 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
2033 setDumpSimplPhases :: String -> DynP ()
2034 setDumpSimplPhases s = do forceRecompile
2035 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
2037 spec = case s of { ('=' : s') -> s'; _ -> s }
2039 setVerbosity :: Maybe Int -> DynP ()
2040 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
2042 addCmdlineHCInclude :: String -> DynP ()
2043 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
2045 extraPkgConf_ :: FilePath -> DynP ()
2046 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
2048 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
2050 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2052 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
2054 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2056 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2058 setPackageName :: String -> DynFlags -> DynFlags
2059 setPackageName p s = s{ thisPackage = stringToPackageId p }
2061 -- If we're linking a binary, then only targets that produce object
2062 -- code are allowed (requests for other target types are ignored).
2063 setTarget :: HscTarget -> DynP ()
2064 setTarget l = upd set
2067 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2070 -- Changes the target only if we're compiling object code. This is
2071 -- used by -fasm and -fllvm, which switch from one to the other, but
2072 -- not from bytecode to object-code. The idea is that -fasm/-fllvm
2073 -- can be safely used in an OPTIONS_GHC pragma.
2074 setObjTarget :: HscTarget -> DynP ()
2075 setObjTarget l = updM set
2078 | isObjectTarget (hscTarget dflags)
2081 | cGhcUnregisterised /= "YES" ->
2082 do addWarn ("Compiler not unregisterised, so ignoring " ++ flag)
2085 | cGhcWithNativeCodeGen /= "YES" ->
2086 do addWarn ("Compiler has no native codegen, so ignoring " ++
2090 | cGhcUnregisterised == "YES" ->
2091 do addWarn ("Compiler unregisterised, so ignoring " ++ flag)
2093 | not ((arch == ArchX86_64) && (os == OSLinux || os == OSDarwin)) &&
2094 (not opt_Static || opt_PIC)
2096 do addWarn ("Ignoring " ++ flag ++ " as it is incompatible with -fPIC and -dynamic on this platform")
2098 _ -> return $ dflags { hscTarget = l }
2099 | otherwise = return dflags
2100 where platform = targetPlatform dflags
2101 arch = platformArch platform
2102 os = platformOS platform
2103 flag = showHscTargetFlag l
2105 setOptLevel :: Int -> DynFlags -> DynP DynFlags
2106 setOptLevel n dflags
2107 | hscTarget dflags == HscInterpreted && n > 0
2108 = do addWarn "-O conflicts with --interactive; -O ignored."
2111 = return (updOptLevel n dflags)
2114 -- -Odph is equivalent to
2116 -- -O2 optimise as much as possible
2117 -- -fmax-simplifier-iterations20 this is necessary sometimes
2118 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
2120 setDPHOpt :: DynFlags -> DynP DynFlags
2121 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2125 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
2126 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
2127 -- vectoriser cannot be used.
2129 data DPHBackend = DPHPar -- "dph-par"
2130 | DPHSeq -- "dph-seq"
2131 | DPHThis -- the currently compiled package
2132 | DPHNone -- no DPH library available
2133 deriving(Eq, Ord, Enum, Show)
2135 setDPHBackend :: DPHBackend -> DynP ()
2136 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2138 -- Query the DPH backend package to be used by the vectoriser and desugaring of DPH syntax.
2140 dphPackageMaybe :: DynFlags -> Maybe PackageId
2141 dphPackageMaybe dflags
2142 = case dphBackend dflags of
2143 DPHPar -> Just dphParPackageId
2144 DPHSeq -> Just dphSeqPackageId
2145 DPHThis -> Just (thisPackage dflags)
2148 setMainIs :: String -> DynP ()
2150 | not (null main_fn) && isLower (head main_fn)
2151 -- The arg looked like "Foo.Bar.baz"
2152 = upd $ \d -> d{ mainFunIs = Just main_fn,
2153 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2155 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2156 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2158 | otherwise -- The arg looked like "baz"
2159 = upd $ \d -> d{ mainFunIs = Just arg }
2161 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2163 -----------------------------------------------------------------------------
2164 -- Paths & Libraries
2166 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2168 -- -i on its own deletes the import paths
2169 addImportPath "" = upd (\s -> s{importPaths = []})
2170 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2173 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2176 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2178 addFrameworkPath p =
2179 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2181 #ifndef mingw32_TARGET_OS
2182 split_marker :: Char
2183 split_marker = ':' -- not configurable (ToDo)
2186 splitPathList :: String -> [String]
2187 splitPathList s = filter notNull (splitUp s)
2188 -- empty paths are ignored: there might be a trailing
2189 -- ':' in the initial list, for example. Empty paths can
2190 -- cause confusion when they are translated into -I options
2191 -- for passing to gcc.
2193 #ifndef mingw32_TARGET_OS
2194 splitUp xs = split split_marker xs
2196 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2198 -- That is, if "foo:bar:baz" is used, this interpreted as
2199 -- consisting of three entries, 'foo', 'bar', 'baz'.
2200 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2201 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2203 -- Notice that no attempt is made to fully replace the 'standard'
2204 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2205 -- that this will cause too much breakage for users & ':' will
2206 -- work fine even with DOS paths, if you're not insisting on being silly.
2209 splitUp (x:':':div:xs) | div `elem` dir_markers
2210 = ((x:':':div:p): splitUp rs)
2212 (p,rs) = findNextPath xs
2213 -- we used to check for existence of the path here, but that
2214 -- required the IO monad to be threaded through the command-line
2215 -- parser which is quite inconvenient. The
2216 splitUp xs = cons p (splitUp rs)
2218 (p,rs) = findNextPath xs
2223 -- will be called either when we've consumed nought or the
2224 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2225 -- finding the next split marker.
2227 case break (`elem` split_markers) xs of
2228 (p, _:ds) -> (p, ds)
2231 split_markers :: [Char]
2232 split_markers = [':', ';']
2234 dir_markers :: [Char]
2235 dir_markers = ['/', '\\']
2238 -- -----------------------------------------------------------------------------
2239 -- tmpDir, where we store temporary files.
2241 setTmpDir :: FilePath -> DynFlags -> DynFlags
2242 setTmpDir dir = alterSettings (\s -> s { sTmpDir = normalise dir })
2243 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2244 -- seem necessary now --SDM 7/2/2008
2246 -----------------------------------------------------------------------------
2249 setRtsOpts :: String -> DynP ()
2250 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2252 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2253 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2255 -----------------------------------------------------------------------------
2258 setOptHpcDir :: String -> DynP ()
2259 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2261 -----------------------------------------------------------------------------
2262 -- Via-C compilation stuff
2264 -- There are some options that we need to pass to gcc when compiling
2265 -- Haskell code via C, but are only supported by recent versions of
2266 -- gcc. The configure script decides which of these options we need,
2267 -- and puts them in the "settings" file in $topdir. The advantage of
2268 -- having these in a separate file is that the file can be created at
2269 -- install-time depending on the available gcc version, and even
2270 -- re-generated later if gcc is upgraded.
2272 -- The options below are not dependent on the version of gcc, only the
2275 picCCOpts :: DynFlags -> [String]
2277 #if darwin_TARGET_OS
2278 -- Apple prefers to do things the other way round.
2279 -- PIC is on by default.
2280 -- -mdynamic-no-pic:
2281 -- Turn off PIC code generation.
2283 -- Don't generate "common" symbols - these are unwanted
2284 -- in dynamic libraries.
2287 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2289 = ["-mdynamic-no-pic"]
2290 #elif mingw32_TARGET_OS
2291 -- no -fPIC for Windows
2293 = ["-U __PIC__","-D__PIC__"]
2297 -- we need -fPIC for C files when we are compiling with -dynamic,
2298 -- otherwise things like stub.c files don't get compiled
2299 -- correctly. They need to reference data in the Haskell
2300 -- objects, but can't without -fPIC. See
2301 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2302 | opt_PIC || not opt_Static
2303 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2308 -- -----------------------------------------------------------------------------
2312 can_split = cSupportsSplitObjs == "YES"
2314 -- -----------------------------------------------------------------------------
2317 compilerInfo :: DynFlags -> [(String, String)]
2319 = -- We always make "Project name" be first to keep parsing in
2320 -- other languages simple, i.e. when looking for other fields,
2321 -- you don't have to worry whether there is a leading '[' or not
2322 ("Project name", cProjectName)
2323 -- Next come the settings, so anything else can be overridden
2324 -- in the settings file (as "lookup" uses the first match for the
2326 : rawSettings dflags
2327 ++ [("Project version", cProjectVersion),
2328 ("Booter version", cBooterVersion),
2330 ("Build platform", cBuildPlatformString),
2331 ("Host platform", cHostPlatformString),
2332 ("Target platform", cTargetPlatformString),
2333 ("Have interpreter", cGhcWithInterpreter),
2334 ("Object splitting supported", cSupportsSplitObjs),
2335 ("Have native code generator", cGhcWithNativeCodeGen),
2336 ("Support SMP", cGhcWithSMP),
2337 ("Unregisterised", cGhcUnregisterised),
2338 ("Tables next to code", cGhcEnableTablesNextToCode),
2339 ("RTS ways", cGhcRTSWays),
2340 ("Leading underscore", cLeadingUnderscore),
2341 ("Debug on", show debugIsOn),
2342 ("LibDir", topDir dflags),
2343 ("Global Package DB", systemPackageConfig dflags),
2344 ("Gcc Linker flags", show cGccLinkerOpts),
2345 ("Ld Linker flags", show cLdLinkerOpts)
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