2 -- Temporary, until rtsIsProfiled is fixed
8 -- (c) The University of Glasgow 2005
11 -- Most flags are dynamic flags, which means they can change from
12 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
13 -- multi-session GHC each session can be using different dynamic
14 -- flags. Dynamic flags can also be set at the prompt in GHCi.
16 -- * Dynamic flags and associated configuration types
28 HscTarget(..), isObjectTarget, defaultObjectTarget,
29 GhcMode(..), isOneShot,
30 GhcLink(..), isNoLink,
34 fFlags, fLangFlags, xFlags,
38 -- ** Manipulating DynFlags
39 defaultDynFlags, -- DynFlags
40 initDynFlags, -- DynFlags -> IO DynFlags
42 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
49 -- ** Parsing DynFlags
51 parseDynamicNoPackageFlags,
54 supportedLanguagesAndExtensions,
56 -- ** DynFlag C compiler options
57 machdepCCOpts, picCCOpts,
59 -- * Configuration of the stg-to-stg passes
63 -- * Compiler configuration suitable for display to the user
67 -- Only in stage 2 can we be sure that the RTS
68 -- exposes the appropriate runtime boolean
73 #include "HsVersions.h"
75 #ifndef OMIT_NATIVE_CODEGEN
80 import PrelNames ( mAIN )
82 import {-# SOURCE #-} Packages (PackageState)
83 import DriverPhases ( Phase(..), phaseInputExt )
86 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
89 import Maybes ( orElse )
93 import Foreign.C ( CInt )
94 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
96 import System.IO.Unsafe ( unsafePerformIO )
98 import Control.Monad ( when )
102 import Data.Map (Map)
103 import qualified Data.Map as Map
104 import System.FilePath
105 import System.IO ( stderr, hPutChar )
107 -- -----------------------------------------------------------------------------
110 -- | Enumerates the simple on-or-off dynamic flags
116 | Opt_D_dump_cmmz_pretty
120 | Opt_D_dump_asm_native
121 | Opt_D_dump_asm_liveness
122 | Opt_D_dump_asm_coalesce
123 | Opt_D_dump_asm_regalloc
124 | Opt_D_dump_asm_regalloc_stages
125 | Opt_D_dump_asm_conflicts
126 | Opt_D_dump_asm_stats
127 | Opt_D_dump_asm_expanded
134 | Opt_D_dump_inlinings
135 | Opt_D_dump_rule_firings
136 | Opt_D_dump_occur_anal
140 | Opt_D_dump_simpl_iterations
141 | Opt_D_dump_simpl_phases
150 | Opt_D_dump_worker_wrapper
151 | Opt_D_dump_rn_trace
152 | Opt_D_dump_rn_stats
154 | Opt_D_dump_simpl_stats
155 | Opt_D_dump_tc_trace
156 | Opt_D_dump_if_trace
163 | Opt_D_verbose_core2core
164 | Opt_D_verbose_stg2stg
166 | Opt_D_dump_hi_diffs
167 | Opt_D_dump_minimal_imports
168 | Opt_D_dump_mod_cycles
169 | Opt_D_dump_view_pattern_commoning
170 | Opt_D_faststring_stats
171 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
172 | Opt_D_no_debug_output
178 | Opt_WarnIsError -- -Werror; makes warnings fatal
179 | Opt_WarnDuplicateExports
181 | Opt_WarnImplicitPrelude
182 | Opt_WarnIncompletePatterns
183 | Opt_WarnIncompletePatternsRecUpd
184 | Opt_WarnMissingFields
185 | Opt_WarnMissingImportList
186 | Opt_WarnMissingMethods
187 | Opt_WarnMissingSigs
188 | Opt_WarnMissingLocalSigs
189 | Opt_WarnNameShadowing
190 | Opt_WarnOverlappingPatterns
191 | Opt_WarnTypeDefaults
192 | Opt_WarnMonomorphism
193 | Opt_WarnUnusedBinds
194 | Opt_WarnUnusedImports
195 | Opt_WarnUnusedMatches
196 | Opt_WarnWarningsDeprecations
197 | Opt_WarnDeprecatedFlags
198 | Opt_WarnDodgyExports
199 | Opt_WarnDodgyImports
201 | Opt_WarnAutoOrphans
204 | Opt_WarnUnrecognisedPragmas
205 | Opt_WarnDodgyForeignImports
206 | Opt_WarnLazyUnliftedBindings
207 | Opt_WarnUnusedDoBind
208 | Opt_WarnWrongDoBind
209 | Opt_WarnAlternativeLayoutRuleTransitional
211 | Opt_PrintExplicitForalls
218 | Opt_StaticArgumentTransformation
222 | Opt_DoLambdaEtaExpansion
226 | Opt_UnboxStrictFields
227 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
229 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
231 | Opt_RegsGraph -- do graph coloring register allocation
232 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
235 | Opt_IgnoreInterfacePragmas
236 | Opt_OmitInterfacePragmas
237 | Opt_ExposeAllUnfoldings
240 | Opt_AutoSccsOnAllToplevs
241 | Opt_AutoSccsOnExportedToplevs
242 | Opt_AutoSccsOnIndividualCafs
249 | Opt_ExcessPrecision
250 | Opt_EagerBlackHoling
251 | Opt_ReadUserPackageConf
255 | Opt_HideAllPackages
256 | Opt_PrintBindResult
260 | Opt_BreakOnException
262 | Opt_PrintEvldWithShow
263 | Opt_PrintBindContents
266 | Opt_EmitExternalCore
268 | Opt_BuildingCabalPackage
275 | Opt_ConvertToZipCfgAndBack
276 | Opt_AutoLinkPackages
277 | Opt_ImplicitImportQualified
286 | Opt_KeepRawTokenStream
291 data Language = Haskell98 | Haskell2010
295 | Opt_OverlappingInstances
296 | Opt_UndecidableInstances
297 | Opt_IncoherentInstances
298 | Opt_MonomorphismRestriction
301 | Opt_RelaxedPolyRec -- Deprecated
302 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
303 | Opt_ForeignFunctionInterface
304 | Opt_UnliftedFFITypes
305 | Opt_GHCForeignImportPrim
306 | Opt_PArr -- Syntactic support for parallel arrays
307 | Opt_Arrows -- Arrow-notation syntax
308 | Opt_TemplateHaskell
311 | Opt_Generics -- "Derivable type classes"
312 | Opt_ImplicitPrelude
313 | Opt_ScopedTypeVariables
317 | Opt_OverloadedStrings
318 | Opt_DisambiguateRecordFields
319 | Opt_RecordWildCards
324 | Opt_DoAndIfThenElse
325 | Opt_RebindableSyntax
327 | Opt_StandaloneDeriving
328 | Opt_DeriveDataTypeable
330 | Opt_DeriveTraversable
333 | Opt_TypeSynonymInstances
334 | Opt_FlexibleContexts
335 | Opt_FlexibleInstances
336 | Opt_ConstrainedClassMethods
337 | Opt_MultiParamTypeClasses
338 | Opt_FunctionalDependencies
340 | Opt_PolymorphicComponents
341 | Opt_ExistentialQuantification
345 | Opt_ParallelListComp
346 | Opt_TransformListComp
347 | Opt_GeneralizedNewtypeDeriving
350 | Opt_PostfixOperators
353 | Opt_LiberalTypeSynonyms
356 | Opt_ImpredicativeTypes
359 | Opt_NewQualifiedOperators
361 | Opt_AlternativeLayoutRule
362 | Opt_AlternativeLayoutRuleTransitional
363 | Opt_DatatypeContexts
366 -- | Contains not only a collection of 'DynFlag's but also a plethora of
367 -- information relating to the compilation of a single file or GHC session
368 data DynFlags = DynFlags {
371 hscTarget :: HscTarget,
372 hscOutName :: String, -- ^ Name of the output file
373 extCoreName :: String, -- ^ Name of the .hcr output file
374 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
375 optLevel :: Int, -- ^ Optimisation level
376 simplPhases :: Int, -- ^ Number of simplifier phases
377 maxSimplIterations :: Int, -- ^ Max simplifier iterations
378 shouldDumpSimplPhase :: Maybe String,
379 ruleCheck :: Maybe String,
380 strictnessBefore :: [Int], -- ^ Additional demand analysis
382 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
383 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
384 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
386 #ifndef OMIT_NATIVE_CODEGEN
387 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
389 stolen_x86_regs :: Int,
390 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
391 importPaths :: [FilePath],
393 mainFunIs :: Maybe String,
394 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
396 dphBackend :: DPHBackend,
398 thisPackage :: PackageId, -- ^ name of package currently being compiled
401 ways :: [Way], -- ^ Way flags from the command line
402 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
403 rtsBuildTag :: String, -- ^ The RTS \"way\"
405 -- For object splitting
406 splitInfo :: Maybe (String,Int),
409 objectDir :: Maybe String,
410 dylibInstallName :: Maybe String,
411 hiDir :: Maybe String,
412 stubDir :: Maybe String,
418 outputFile :: Maybe String,
419 outputHi :: Maybe String,
420 dynLibLoader :: DynLibLoader,
422 -- | This is set by 'DriverPipeline.runPipeline' based on where
423 -- its output is going.
424 dumpPrefix :: Maybe FilePath,
426 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
427 -- Set by @-ddump-file-prefix@
428 dumpPrefixForce :: Maybe FilePath,
430 includePaths :: [String],
431 libraryPaths :: [String],
432 frameworkPaths :: [String], -- used on darwin only
433 cmdlineFrameworks :: [String], -- ditto
434 tmpDir :: String, -- no trailing '/'
436 ghcUsagePath :: FilePath, -- Filled in by SysTools
437 ghciUsagePath :: FilePath, -- ditto
438 rtsOpts :: Maybe String,
439 rtsOptsEnabled :: RtsOptsEnabled,
441 hpcDir :: String, -- ^ Path to store the .mix files
443 -- options for particular phases
451 opt_windres :: [String],
452 opt_lo :: [String], -- LLVM: llvm optimiser
453 opt_lc :: [String], -- LLVM: llc static compiler
455 -- commands for particular phases
457 pgm_P :: (String,[Option]),
459 pgm_c :: (String,[Option]),
460 pgm_m :: (String,[Option]),
461 pgm_s :: (String,[Option]),
462 pgm_a :: (String,[Option]),
463 pgm_l :: (String,[Option]),
464 pgm_dll :: (String,[Option]),
466 pgm_sysman :: String,
467 pgm_windres :: String,
468 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
469 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
472 depMakefile :: FilePath,
473 depIncludePkgDeps :: Bool,
474 depExcludeMods :: [ModuleName],
475 depSuffixes :: [String],
478 extraPkgConfs :: [FilePath],
479 topDir :: FilePath, -- filled in by SysTools
480 systemPackageConfig :: FilePath, -- ditto
481 -- ^ The @-package-conf@ flags given on the command line, in the order
484 packageFlags :: [PackageFlag],
485 -- ^ The @-package@ and @-hide-package@ flags from the command-line
488 -- NB. do not modify this field, it is calculated by
489 -- Packages.initPackages and Packages.updatePackages.
490 pkgDatabase :: Maybe [PackageConfig],
491 pkgState :: PackageState,
494 -- These have to be IORefs, because the defaultCleanupHandler needs to
495 -- know what to clean when an exception happens
496 filesToClean :: IORef [FilePath],
497 dirsToClean :: IORef (Map FilePath FilePath),
501 -- Don't change this without updating extensionFlags:
502 language :: Maybe Language,
503 -- Don't change this without updating extensionFlags:
504 extensions :: [OnOff ExtensionFlag],
505 -- extensionFlags should always be equal to
506 -- flattenExtensionFlags language extensions
507 extensionFlags :: [ExtensionFlag],
509 -- | Message output action: use "ErrUtils" instead of this if you can
510 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
512 haddockOptions :: Maybe String
515 wayNames :: DynFlags -> [WayName]
516 wayNames = map wayName . ways
518 -- | The target code type of the compilation (if any).
520 -- Whenever you change the target, also make sure to set 'ghcLink' to
521 -- something sensible.
523 -- 'HscNothing' can be used to avoid generating any output, however, note
526 -- * This will not run the desugaring step, thus no warnings generated in
527 -- this step will be output. In particular, this includes warnings related
528 -- to pattern matching. You can run the desugarer manually using
529 -- 'GHC.desugarModule'.
531 -- * If a program uses Template Haskell the typechecker may try to run code
532 -- from an imported module. This will fail if no code has been generated
533 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
534 -- whether this might be the case and choose to either switch to a
535 -- different target or avoid typechecking such modules. (The latter may
536 -- preferable for security reasons.)
539 = HscC -- ^ Generate C code.
540 | HscAsm -- ^ Generate assembly using the native code generator.
541 | HscLlvm -- ^ Generate assembly using the llvm code generator.
542 | HscJava -- ^ Generate Java bytecode.
543 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
544 | HscNothing -- ^ Don't generate any code. See notes above.
547 -- | Will this target result in an object file on the disk?
548 isObjectTarget :: HscTarget -> Bool
549 isObjectTarget HscC = True
550 isObjectTarget HscAsm = True
551 isObjectTarget HscLlvm = True
552 isObjectTarget _ = False
554 -- | The 'GhcMode' tells us whether we're doing multi-module
555 -- compilation (controlled via the "GHC" API) or one-shot
556 -- (single-module) compilation. This makes a difference primarily to
557 -- the "Finder": in one-shot mode we look for interface files for
558 -- imported modules, but in multi-module mode we look for source files
559 -- in order to check whether they need to be recompiled.
561 = CompManager -- ^ @\-\-make@, GHCi, etc.
562 | OneShot -- ^ @ghc -c Foo.hs@
563 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
566 instance Outputable GhcMode where
567 ppr CompManager = ptext (sLit "CompManager")
568 ppr OneShot = ptext (sLit "OneShot")
569 ppr MkDepend = ptext (sLit "MkDepend")
571 isOneShot :: GhcMode -> Bool
572 isOneShot OneShot = True
573 isOneShot _other = False
575 -- | What to do in the link step, if there is one.
577 = NoLink -- ^ Don't link at all
578 | LinkBinary -- ^ Link object code into a binary
579 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
580 -- bytecode and object code).
581 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
584 isNoLink :: GhcLink -> Bool
585 isNoLink NoLink = True
588 -- Is it worth evaluating this Bool and caching it in the DynFlags value
589 -- during initDynFlags?
590 doingTickyProfiling :: DynFlags -> Bool
591 doingTickyProfiling _ = opt_Ticky
592 -- XXX -ticky is a static flag, because it implies -debug which is also
593 -- static. If the way flags were made dynamic, we could fix this.
596 = ExposePackage String
597 | ExposePackageId String
599 | IgnorePackage String
602 defaultHscTarget :: HscTarget
603 defaultHscTarget = defaultObjectTarget
605 -- | The 'HscTarget' value corresponding to the default way to create
606 -- object files on the current platform.
607 defaultObjectTarget :: HscTarget
609 | cGhcWithNativeCodeGen == "YES" = HscAsm
617 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
619 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
620 initDynFlags :: DynFlags -> IO DynFlags
621 initDynFlags dflags = do
622 -- someday these will be dynamic flags
623 ways <- readIORef v_Ways
624 refFilesToClean <- newIORef []
625 refDirsToClean <- newIORef Map.empty
628 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
629 rtsBuildTag = mkBuildTag ways,
630 filesToClean = refFilesToClean,
631 dirsToClean = refDirsToClean
634 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
635 -- and must be fully initialized by 'GHC.newSession' first.
636 defaultDynFlags :: DynFlags
639 ghcMode = CompManager,
640 ghcLink = LinkBinary,
641 hscTarget = defaultHscTarget,
647 maxSimplIterations = 4,
648 shouldDumpSimplPhase = Nothing,
650 specConstrThreshold = Just 200,
651 specConstrCount = Just 3,
652 liberateCaseThreshold = Just 200,
653 strictnessBefore = [],
655 #ifndef OMIT_NATIVE_CODEGEN
656 targetPlatform = defaultTargetPlatform,
659 cmdlineHcIncludes = [],
663 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
667 thisPackage = mainPackageId,
670 dylibInstallName = Nothing,
674 objectSuf = phaseInputExt StopLn,
675 hcSuf = phaseInputExt HCc,
678 outputFile = Nothing,
680 dynLibLoader = SystemDependent,
681 dumpPrefix = Nothing,
682 dumpPrefixForce = Nothing,
686 cmdlineFrameworks = [],
687 tmpDir = cDEFAULT_TMPDIR,
689 rtsOptsEnabled = RtsOptsSafeOnly,
695 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
708 pkgDatabase = Nothing,
709 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
710 ways = panic "defaultDynFlags: No ways",
711 buildTag = panic "defaultDynFlags: No buildTag",
712 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
714 -- initSysTools fills all these in
715 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
716 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
717 topDir = panic "defaultDynFlags: No topDir",
718 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
719 pgm_L = panic "defaultDynFlags: No pgm_L",
720 pgm_P = panic "defaultDynFlags: No pgm_P",
721 pgm_F = panic "defaultDynFlags: No pgm_F",
722 pgm_c = panic "defaultDynFlags: No pgm_c",
723 pgm_m = panic "defaultDynFlags: No pgm_m",
724 pgm_s = panic "defaultDynFlags: No pgm_s",
725 pgm_a = panic "defaultDynFlags: No pgm_a",
726 pgm_l = panic "defaultDynFlags: No pgm_l",
727 pgm_dll = panic "defaultDynFlags: No pgm_dll",
728 pgm_T = panic "defaultDynFlags: No pgm_T",
729 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
730 pgm_windres = panic "defaultDynFlags: No pgm_windres",
731 pgm_lo = panic "defaultDynFlags: No pgm_lo",
732 pgm_lc = panic "defaultDynFlags: No pgm_lc",
733 -- end of initSysTools values
735 depMakefile = "Makefile",
736 depIncludePkgDeps = False,
739 -- end of ghc -M values
740 filesToClean = panic "defaultDynFlags: No filesToClean",
741 dirsToClean = panic "defaultDynFlags: No dirsToClean",
742 haddockOptions = Nothing,
743 flags = defaultFlags,
746 extensionFlags = flattenExtensionFlags Nothing [],
748 log_action = \severity srcSpan style msg ->
750 SevOutput -> printOutput (msg style)
751 SevInfo -> printErrs (msg style)
752 SevFatal -> printErrs (msg style)
755 printErrs ((mkLocMessage srcSpan msg) style)
756 -- careful (#2302): printErrs prints in UTF-8, whereas
757 -- converting to string first and using hPutStr would
758 -- just emit the low 8 bits of each unicode char.
762 Note [Verbosity levels]
763 ~~~~~~~~~~~~~~~~~~~~~~~
764 0 | print errors & warnings only
765 1 | minimal verbosity: print "compiling M ... done." for each module.
766 2 | equivalent to -dshow-passes
767 3 | equivalent to existing "ghc -v"
768 4 | "ghc -v -ddump-most"
769 5 | "ghc -v -ddump-all"
775 -- OnOffs accumulate in reverse order, so we use foldr in order to
776 -- process them in the right order
777 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
779 flattenExtensionFlags ml = foldr f defaultExtensionFlags
780 where f (On f) flags = f : delete f flags
781 f (Off f) flags = delete f flags
782 defaultExtensionFlags = languageExtensions ml
784 languageExtensions :: Maybe Language -> [ExtensionFlag]
786 languageExtensions Nothing
787 -- Nothing => the default case
788 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
789 -- behaviour the default, to see if anyone notices
791 -- In due course I'd like Opt_MonoLocalBinds to be on by default
792 -- But NB it's implied by GADTs etc
793 -- SLPJ September 2010
794 : languageExtensions (Just Haskell2010)
796 languageExtensions (Just Haskell98)
797 = [Opt_ImplicitPrelude,
798 Opt_MonomorphismRestriction,
800 Opt_DatatypeContexts]
802 languageExtensions (Just Haskell2010)
803 = [Opt_ImplicitPrelude,
804 Opt_MonomorphismRestriction,
805 Opt_DatatypeContexts,
807 Opt_ForeignFunctionInterface,
812 -- | Test whether a 'DynFlag' is set
813 dopt :: DynFlag -> DynFlags -> Bool
814 dopt f dflags = f `elem` (flags dflags)
817 dopt_set :: DynFlags -> DynFlag -> DynFlags
818 dopt_set dfs f = dfs{ flags = f : flags dfs }
820 -- | Unset a 'DynFlag'
821 dopt_unset :: DynFlags -> DynFlag -> DynFlags
822 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
824 -- | Test whether a 'ExtensionFlag' is set
825 xopt :: ExtensionFlag -> DynFlags -> Bool
826 xopt f dflags = f `elem` extensionFlags dflags
828 -- | Set a 'ExtensionFlag'
829 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
831 = let onoffs = On f : extensions dfs
832 in dfs { extensions = onoffs,
833 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
835 -- | Unset a 'ExtensionFlag'
836 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
838 = let onoffs = Off f : extensions dfs
839 in dfs { extensions = onoffs,
840 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
842 setLanguage :: Language -> DynP ()
843 setLanguage l = upd f
844 where f dfs = let mLang = Just l
845 oneoffs = extensions dfs
848 extensionFlags = flattenExtensionFlags mLang oneoffs
851 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
852 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
853 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
854 -> [a] -- ^ Correctly ordered extracted options
855 getOpts dflags opts = reverse (opts dflags)
856 -- We add to the options from the front, so we need to reverse the list
858 -- | Gets the verbosity flag for the current verbosity level. This is fed to
859 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
860 getVerbFlag :: DynFlags -> String
862 | verbosity dflags >= 3 = "-v"
865 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
866 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
867 setPgmP, addOptl, addOptP,
868 addCmdlineFramework, addHaddockOpts
869 :: String -> DynFlags -> DynFlags
870 setOutputFile, setOutputHi, setDumpPrefixForce
871 :: Maybe String -> DynFlags -> DynFlags
873 setObjectDir f d = d{ objectDir = Just f}
874 setHiDir f d = d{ hiDir = Just f}
875 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
876 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
877 -- \#included from the .hc file when compiling with -fvia-C.
878 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
879 setDylibInstallName f d = d{ dylibInstallName = Just f}
881 setObjectSuf f d = d{ objectSuf = f}
882 setHiSuf f d = d{ hiSuf = f}
883 setHcSuf f d = d{ hcSuf = f}
885 setOutputFile f d = d{ outputFile = f}
886 setOutputHi f d = d{ outputHi = f}
888 parseDynLibLoaderMode f d =
890 ("deploy", "") -> d{ dynLibLoader = Deployable }
891 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
892 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
894 setDumpPrefixForce f d = d { dumpPrefixForce = f}
896 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
897 -- Config.hs should really use Option.
898 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
899 addOptl f d = d{ opt_l = f : opt_l d}
900 addOptP f d = d{ opt_P = f : opt_P d}
903 setDepMakefile :: FilePath -> DynFlags -> DynFlags
904 setDepMakefile f d = d { depMakefile = deOptDep f }
906 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
907 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
909 addDepExcludeMod :: String -> DynFlags -> DynFlags
911 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
913 addDepSuffix :: FilePath -> DynFlags -> DynFlags
914 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
917 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
918 -- we need to strip the "-optdep" off of the arg
919 deOptDep :: String -> String
920 deOptDep x = case stripPrefix "-optdep" x of
924 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
926 addHaddockOpts f d = d{ haddockOptions = Just f}
928 -- -----------------------------------------------------------------------------
929 -- Command-line options
931 -- | When invoking external tools as part of the compilation pipeline, we
932 -- pass these a sequence of options on the command-line. Rather than
933 -- just using a list of Strings, we use a type that allows us to distinguish
934 -- between filepaths and 'other stuff'. The reason for this is that
935 -- this type gives us a handle on transforming filenames, and filenames only,
936 -- to whatever format they're expected to be on a particular platform.
938 = FileOption -- an entry that _contains_ filename(s) / filepaths.
939 String -- a non-filepath prefix that shouldn't be
940 -- transformed (e.g., "/out=")
941 String -- the filepath/filename portion
944 showOpt :: Option -> String
945 showOpt (FileOption pre f) = pre ++ f
946 showOpt (Option s) = s
948 -----------------------------------------------------------------------------
949 -- Setting the optimisation level
951 updOptLevel :: Int -> DynFlags -> DynFlags
952 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
954 = dfs2{ optLevel = final_n }
956 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
957 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
958 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
960 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
961 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
963 -- -----------------------------------------------------------------------------
964 -- StgToDo: abstraction of stg-to-stg passes to run.
967 = StgDoMassageForProfiling -- should be (next to) last
968 -- There's also setStgVarInfo, but its absolute "lastness"
969 -- is so critical that it is hardwired in (no flag).
972 getStgToDo :: DynFlags -> [StgToDo]
976 stg_stats = dopt Opt_StgStats dflags
978 todo1 = if stg_stats then [D_stg_stats] else []
980 todo2 | WayProf `elem` wayNames dflags
981 = StgDoMassageForProfiling : todo1
985 {- **********************************************************************
989 %********************************************************************* -}
991 -- -----------------------------------------------------------------------------
992 -- Parsing the dynamic flags.
994 -- | Parse dynamic flags from a list of command line arguments. Returns the
995 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
996 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
997 -- flags or missing arguments).
998 parseDynamicFlags :: Monad m =>
999 DynFlags -> [Located String]
1000 -> m (DynFlags, [Located String], [Located String])
1001 -- ^ Updated 'DynFlags', left-over arguments, and
1002 -- list of warnings.
1003 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1005 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1006 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1007 parseDynamicNoPackageFlags :: Monad m =>
1008 DynFlags -> [Located String]
1009 -> m (DynFlags, [Located String], [Located String])
1010 -- ^ Updated 'DynFlags', left-over arguments, and
1011 -- list of warnings.
1012 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1014 parseDynamicFlags_ :: Monad m =>
1015 DynFlags -> [Located String] -> Bool
1016 -> m (DynFlags, [Located String], [Located String])
1017 parseDynamicFlags_ dflags0 args pkg_flags = do
1018 -- XXX Legacy support code
1019 -- We used to accept things like
1020 -- optdep-f -optdepdepend
1021 -- optdep-f -optdep depend
1022 -- optdep -f -optdepdepend
1023 -- optdep -f -optdep depend
1024 -- but the spaces trip up proper argument handling. So get rid of them.
1025 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1026 f (x : xs) = x : f xs
1030 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1031 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1032 | otherwise = dynamic_flags
1034 let ((leftover, errs, warns), dflags1)
1035 = runCmdLine (processArgs flag_spec args') dflags0
1036 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1038 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1039 -- isn't up to the job. We know that if hscTarget == HscC, then the
1040 -- user has explicitly used -fvia-C, because -fasm is the default,
1041 -- unless there is no NCG on this platform. The latter case is
1042 -- checked when the -fPIC flag is parsed.
1044 let (pic_warns, dflags2)
1045 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1046 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1047 dflags1{ hscTarget = HscAsm })
1048 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1049 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1050 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1051 ++ "dynamic on this platform;\n ignoring -fllvm"],
1052 dflags1{ hscTarget = HscAsm })
1054 | otherwise = ([], dflags1)
1056 return (dflags2, leftover, pic_warns ++ warns)
1059 {- **********************************************************************
1061 DynFlags specifications
1063 %********************************************************************* -}
1065 allFlags :: [String]
1066 allFlags = map ('-':) $
1067 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1068 map ("fno-"++) flags ++
1069 map ("f"++) flags ++
1070 map ("f"++) flags' ++
1071 map ("X"++) supportedExtensions
1072 where ok (PrefixPred _ _) = False
1074 flags = [ name | (name, _, _) <- fFlags ]
1075 flags' = [ name | (name, _, _) <- fLangFlags ]
1077 --------------- The main flags themselves ------------------
1078 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1080 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1081 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1082 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1084 (HasArg (\s -> do { addCmdlineHCInclude s
1085 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1086 , Flag "v" (OptIntSuffix setVerbosity)
1088 ------- Specific phases --------------------------------------------
1089 -- need to appear before -pgmL to be parsed as LLVM flags.
1090 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1091 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1092 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1093 , Flag "pgmP" (hasArg setPgmP)
1094 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1095 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1096 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1097 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1098 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1099 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1100 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1101 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1103 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1104 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1105 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1106 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1107 , Flag "optP" (hasArg addOptP)
1108 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1109 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1110 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1111 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1112 , Flag "optl" (hasArg addOptl)
1113 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1116 (NoArg (if can_split
1117 then setDynFlag Opt_SplitObjs
1118 else addWarn "ignoring -fsplit-objs"))
1120 -------- ghc -M -----------------------------------------------------
1121 , Flag "dep-suffix" (hasArg addDepSuffix)
1122 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1123 , Flag "dep-makefile" (hasArg setDepMakefile)
1124 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1125 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1126 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1127 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1128 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1129 , Flag "exclude-module" (hasArg addDepExcludeMod)
1130 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1131 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1133 -------- Linking ----------------------------------------------------
1134 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1135 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1136 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1137 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1139 ------- Libraries ---------------------------------------------------
1140 , Flag "L" (Prefix addLibraryPath)
1141 , Flag "l" (AnySuffix (upd . addOptl))
1143 ------- Frameworks --------------------------------------------------
1144 -- -framework-path should really be -F ...
1145 , Flag "framework-path" (HasArg addFrameworkPath)
1146 , Flag "framework" (hasArg addCmdlineFramework)
1148 ------- Output Redirection ------------------------------------------
1149 , Flag "odir" (hasArg setObjectDir)
1150 , Flag "o" (SepArg (upd . setOutputFile . Just))
1151 , Flag "ohi" (hasArg (setOutputHi . Just ))
1152 , Flag "osuf" (hasArg setObjectSuf)
1153 , Flag "hcsuf" (hasArg setHcSuf)
1154 , Flag "hisuf" (hasArg setHiSuf)
1155 , Flag "hidir" (hasArg setHiDir)
1156 , Flag "tmpdir" (hasArg setTmpDir)
1157 , Flag "stubdir" (hasArg setStubDir)
1158 , Flag "outputdir" (hasArg setOutputDir)
1159 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1161 ------- Keeping temporary files -------------------------------------
1162 -- These can be singular (think ghc -c) or plural (think ghc --make)
1163 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1164 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1165 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1166 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1167 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1168 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1169 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1170 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1171 -- This only makes sense as plural
1172 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1174 ------- Miscellaneous ----------------------------------------------
1175 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1176 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1177 , Flag "with-rtsopts" (HasArg setRtsOpts)
1178 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1179 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1180 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1181 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1182 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1183 , Flag "main-is" (SepArg setMainIs)
1184 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1185 , Flag "haddock-opts" (hasArg addHaddockOpts)
1186 , Flag "hpcdir" (SepArg setOptHpcDir)
1188 ------- recompilation checker --------------------------------------
1189 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1190 ; deprecate "Use -fno-force-recomp instead" }))
1191 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1192 ; deprecate "Use -fforce-recomp instead" }))
1194 ------ HsCpp opts ---------------------------------------------------
1195 , Flag "D" (AnySuffix (upd . addOptP))
1196 , Flag "U" (AnySuffix (upd . addOptP))
1198 ------- Include/Import Paths ----------------------------------------
1199 , Flag "I" (Prefix addIncludePath)
1200 , Flag "i" (OptPrefix addImportPath)
1202 ------ Debugging ----------------------------------------------------
1203 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1205 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1206 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1207 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1208 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1209 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1210 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1211 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1212 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1213 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1214 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1215 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1216 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1217 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1218 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1219 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1220 ; setDumpFlag' Opt_D_dump_llvm}))
1221 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1222 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1223 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1224 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1225 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1226 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1227 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1228 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1229 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1230 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1231 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1232 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1233 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1234 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1235 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1236 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1237 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1238 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1239 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1240 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1241 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1242 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1243 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1244 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1245 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1246 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1247 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1248 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1249 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1250 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1251 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1252 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1253 ; setVerboseCore2Core }))
1254 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1255 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1256 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1257 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1258 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1259 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1260 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1261 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1262 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1263 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1264 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1265 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1266 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1267 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1268 , Flag "dshow-passes" (NoArg (do forceRecompile
1269 setVerbosity (Just 2)))
1270 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1272 ------ Machine dependant (-m<blah>) stuff ---------------------------
1274 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1275 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1276 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1277 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1279 ------ Warning opts -------------------------------------------------
1280 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1281 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1282 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1283 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1284 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1285 ; deprecate "Use -w instead" }))
1286 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1288 ------ Optimisation flags ------------------------------------------
1289 , Flag "O" (noArg (setOptLevel 1))
1290 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1291 , Flag "Odph" (noArg setDPHOpt)
1292 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1293 -- If the number is missing, use 1
1295 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1296 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1297 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1298 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1299 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1300 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1301 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1302 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1303 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1304 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1305 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1307 ------ Profiling ----------------------------------------------------
1309 -- XXX Should the -f* flags be deprecated?
1310 -- They don't seem to be documented
1311 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1312 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1313 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1314 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1315 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1316 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1317 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1318 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1319 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1321 ------ DPH flags ----------------------------------------------------
1323 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1324 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1325 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1327 ------ Compiler flags -----------------------------------------------
1329 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1330 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1331 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1332 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1333 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1334 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1336 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1337 setTarget HscNothing))
1338 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1339 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1340 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1341 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1343 ++ map (mkFlag True "f" setDynFlag ) fFlags
1344 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1345 ++ map (mkFlag True "f" setExtensionFlag ) fLangFlags
1346 ++ map (mkFlag False "fno-" unSetExtensionFlag) fLangFlags
1347 ++ map (mkFlag True "X" setExtensionFlag ) xFlags
1348 ++ map (mkFlag False "XNo" unSetExtensionFlag) xFlags
1349 ++ map (mkFlag True "X" setLanguage) languageFlags
1351 package_flags :: [Flag (CmdLineP DynFlags)]
1353 ------- Packages ----------------------------------------------------
1354 Flag "package-conf" (HasArg extraPkgConf_)
1355 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1356 , Flag "package-name" (hasArg setPackageName)
1357 , Flag "package-id" (HasArg exposePackageId)
1358 , Flag "package" (HasArg exposePackage)
1359 , Flag "hide-package" (HasArg hidePackage)
1360 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1361 , Flag "ignore-package" (HasArg ignorePackage)
1362 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1363 ; deprecate "Use -package instead" }))
1367 = ( String -- Flag in string form
1368 , flag -- Flag in internal form
1369 , Bool -> DynP ()) -- Extra action to run when the flag is found
1370 -- Typically, emit a warning or error
1371 -- True <=> we are turning the flag on
1372 -- False <=> we are turning the flag off
1375 mkFlag :: Bool -- ^ True <=> it should be turned on
1376 -> String -- ^ The flag prefix
1377 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1378 -> FlagSpec flag -- ^ Specification of this particular flag
1379 -> Flag (CmdLineP DynFlags)
1380 mkFlag turnOn flagPrefix f (name, flag, extra_action)
1381 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turnOn))
1383 deprecatedForExtension :: String -> Bool -> DynP ()
1384 deprecatedForExtension lang turn_on
1385 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1387 flag | turn_on = lang
1388 | otherwise = "No"++lang
1390 useInstead :: String -> Bool -> DynP ()
1391 useInstead flag turn_on
1392 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1394 no = if turn_on then "" else "no-"
1396 nop :: Bool -> DynP ()
1399 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1400 fFlags :: [FlagSpec DynFlag]
1402 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1403 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1404 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1405 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1406 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1407 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1408 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1409 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1410 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1411 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1412 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1413 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1414 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1415 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1416 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1417 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1418 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1419 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1420 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1421 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1422 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1423 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1424 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1425 ( "warn-orphans", Opt_WarnOrphans, nop ),
1426 ( "warn-identities", Opt_WarnIdentities, nop ),
1427 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1428 ( "warn-tabs", Opt_WarnTabs, nop ),
1429 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1430 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1431 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1432 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1433 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1434 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1435 ( "strictness", Opt_Strictness, nop ),
1436 ( "specialise", Opt_Specialise, nop ),
1437 ( "float-in", Opt_FloatIn, nop ),
1438 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1439 ( "full-laziness", Opt_FullLaziness, nop ),
1440 ( "liberate-case", Opt_LiberateCase, nop ),
1441 ( "spec-constr", Opt_SpecConstr, nop ),
1442 ( "cse", Opt_CSE, nop ),
1443 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1444 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1445 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1446 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1447 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1448 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1449 ( "case-merge", Opt_CaseMerge, nop ),
1450 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1451 ( "method-sharing", Opt_MethodSharing,
1452 \_ -> deprecate "doesn't do anything any more"),
1453 -- Remove altogether in GHC 7.2
1454 ( "dicts-cheap", Opt_DictsCheap, nop ),
1455 ( "excess-precision", Opt_ExcessPrecision, nop ),
1456 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1457 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1458 ( "print-bind-result", Opt_PrintBindResult, nop ),
1459 ( "force-recomp", Opt_ForceRecomp, nop ),
1460 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1461 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1462 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1463 ( "break-on-exception", Opt_BreakOnException, nop ),
1464 ( "break-on-error", Opt_BreakOnError, nop ),
1465 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1466 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1467 ( "run-cps", Opt_RunCPS, nop ),
1468 ( "run-cpsz", Opt_RunCPSZ, nop ),
1469 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1470 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1471 ( "vectorise", Opt_Vectorise, nop ),
1472 ( "regs-graph", Opt_RegsGraph, nop ),
1473 ( "regs-iterative", Opt_RegsIterative, nop ),
1474 ( "gen-manifest", Opt_GenManifest, nop ),
1475 ( "embed-manifest", Opt_EmbedManifest, nop ),
1476 ( "ext-core", Opt_EmitExternalCore, nop ),
1477 ( "shared-implib", Opt_SharedImplib, nop ),
1478 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1479 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1480 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1483 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1484 fLangFlags :: [FlagSpec ExtensionFlag]
1486 ( "th", Opt_TemplateHaskell,
1487 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1488 ( "fi", Opt_ForeignFunctionInterface,
1489 deprecatedForExtension "ForeignFunctionInterface" ),
1490 ( "ffi", Opt_ForeignFunctionInterface,
1491 deprecatedForExtension "ForeignFunctionInterface" ),
1492 ( "arrows", Opt_Arrows,
1493 deprecatedForExtension "Arrows" ),
1494 ( "generics", Opt_Generics,
1495 deprecatedForExtension "Generics" ),
1496 ( "implicit-prelude", Opt_ImplicitPrelude,
1497 deprecatedForExtension "ImplicitPrelude" ),
1498 ( "bang-patterns", Opt_BangPatterns,
1499 deprecatedForExtension "BangPatterns" ),
1500 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1501 deprecatedForExtension "MonomorphismRestriction" ),
1502 ( "mono-pat-binds", Opt_MonoPatBinds,
1503 deprecatedForExtension "MonoPatBinds" ),
1504 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1505 deprecatedForExtension "ExtendedDefaultRules" ),
1506 ( "implicit-params", Opt_ImplicitParams,
1507 deprecatedForExtension "ImplicitParams" ),
1508 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1509 deprecatedForExtension "ScopedTypeVariables" ),
1511 deprecatedForExtension "PArr" ),
1512 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1513 deprecatedForExtension "OverlappingInstances" ),
1514 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1515 deprecatedForExtension "UndecidableInstances" ),
1516 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1517 deprecatedForExtension "IncoherentInstances" )
1520 supportedLanguages :: [String]
1521 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1523 supportedExtensions :: [String]
1524 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1526 supportedLanguagesAndExtensions :: [String]
1527 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1529 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1530 languageFlags :: [FlagSpec Language]
1532 ( "Haskell98", Haskell98, nop ),
1533 ( "Haskell2010", Haskell2010, nop )
1536 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1537 xFlags :: [FlagSpec ExtensionFlag]
1539 ( "CPP", Opt_Cpp, nop ),
1540 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1541 ( "TupleSections", Opt_TupleSections, nop ),
1542 ( "PatternGuards", Opt_PatternGuards, nop ),
1543 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1544 ( "MagicHash", Opt_MagicHash, nop ),
1545 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1546 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1547 ( "KindSignatures", Opt_KindSignatures, nop ),
1548 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1549 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1550 ( "TransformListComp", Opt_TransformListComp, nop ),
1551 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1552 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1553 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1554 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1555 ( "Rank2Types", Opt_Rank2Types, nop ),
1556 ( "RankNTypes", Opt_RankNTypes, nop ),
1557 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1558 ( "TypeOperators", Opt_TypeOperators, nop ),
1559 ( "RecursiveDo", Opt_RecursiveDo,
1560 deprecatedForExtension "DoRec"),
1561 ( "DoRec", Opt_DoRec, nop ),
1562 ( "Arrows", Opt_Arrows, nop ),
1563 ( "PArr", Opt_PArr, nop ),
1564 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1565 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1566 ( "Generics", Opt_Generics, nop ),
1567 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1568 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1569 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1570 ( "RecordPuns", Opt_RecordPuns,
1571 deprecatedForExtension "NamedFieldPuns" ),
1572 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1573 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1574 ( "GADTs", Opt_GADTs, nop ),
1575 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1576 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1577 ( "BangPatterns", Opt_BangPatterns, nop ),
1578 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1579 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1580 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1581 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1582 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1583 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1584 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1585 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1586 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1587 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1588 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1589 \ turn_on -> if not turn_on
1590 then deprecate "You can't turn off RelaxedPolyRec any more"
1592 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1593 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1594 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1596 ( "PatternSignatures", Opt_ScopedTypeVariables,
1597 deprecatedForExtension "ScopedTypeVariables" ),
1599 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1600 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1601 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1602 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1603 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1604 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1605 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1606 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1607 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1608 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1609 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1610 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1611 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1612 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1613 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1614 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1615 ( "PackageImports", Opt_PackageImports, nop ),
1616 ( "NewQualifiedOperators", Opt_NewQualifiedOperators,
1617 \_ -> deprecate "The new qualified operator syntax was rejected by Haskell'" )
1620 defaultFlags :: [DynFlag]
1622 = [ Opt_AutoLinkPackages,
1623 Opt_ReadUserPackageConf,
1631 Opt_PrintBindContents,
1635 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1636 -- The default -O0 options
1640 impliedFlags :: [(ExtensionFlag, ExtensionFlag)]
1642 = [ (Opt_RankNTypes, Opt_ExplicitForAll)
1643 , (Opt_Rank2Types, Opt_ExplicitForAll)
1644 , (Opt_ScopedTypeVariables, Opt_ExplicitForAll)
1645 , (Opt_LiberalTypeSynonyms, Opt_ExplicitForAll)
1646 , (Opt_ExistentialQuantification, Opt_ExplicitForAll)
1647 , (Opt_PolymorphicComponents, Opt_ExplicitForAll)
1649 , (Opt_RebindableSyntax, Opt_ImplicitPrelude)
1651 , (Opt_GADTs, Opt_MonoLocalBinds)
1652 , (Opt_TypeFamilies, Opt_MonoLocalBinds)
1654 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1655 -- all over the place
1657 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1659 -- Record wild-cards implies field disambiguation
1660 -- Otherwise if you write (C {..}) you may well get
1661 -- stuff like " 'a' not in scope ", which is a bit silly
1662 -- if the compiler has just filled in field 'a' of constructor 'C'
1663 , (Opt_RecordWildCards, Opt_DisambiguateRecordFields)
1666 optLevelFlags :: [([Int], DynFlag)]
1668 = [ ([0], Opt_IgnoreInterfacePragmas)
1669 , ([0], Opt_OmitInterfacePragmas)
1671 , ([1,2], Opt_IgnoreAsserts)
1672 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1674 , ([1,2], Opt_DoEtaReduction)
1675 , ([1,2], Opt_CaseMerge)
1676 , ([1,2], Opt_Strictness)
1678 , ([1,2], Opt_FullLaziness)
1679 , ([1,2], Opt_Specialise)
1680 , ([1,2], Opt_FloatIn)
1682 , ([2], Opt_LiberateCase)
1683 , ([2], Opt_SpecConstr)
1684 , ([2], Opt_RegsGraph)
1686 -- , ([2], Opt_StaticArgumentTransformation)
1687 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1688 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1689 -- several improvements to the heuristics, and I'm concerned that without
1690 -- those changes SAT will interfere with some attempts to write "high
1691 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1692 -- this year. In particular, the version in HEAD lacks the tail call
1693 -- criterion, so many things that look like reasonable loops will be
1694 -- turned into functions with extra (unneccesary) thunk creation.
1696 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1697 -- This one is important for a tiresome reason:
1698 -- we want to make sure that the bindings for data
1699 -- constructors are eta-expanded. This is probably
1700 -- a good thing anyway, but it seems fragile.
1703 -- -----------------------------------------------------------------------------
1704 -- Standard sets of warning options
1706 standardWarnings :: [DynFlag]
1708 = [ Opt_WarnWarningsDeprecations,
1709 Opt_WarnDeprecatedFlags,
1710 Opt_WarnUnrecognisedPragmas,
1711 Opt_WarnOverlappingPatterns,
1712 Opt_WarnMissingFields,
1713 Opt_WarnMissingMethods,
1714 Opt_WarnDuplicateExports,
1715 Opt_WarnLazyUnliftedBindings,
1716 Opt_WarnDodgyForeignImports,
1717 Opt_WarnWrongDoBind,
1718 Opt_WarnAlternativeLayoutRuleTransitional
1721 minusWOpts :: [DynFlag]
1723 = standardWarnings ++
1724 [ Opt_WarnUnusedBinds,
1725 Opt_WarnUnusedMatches,
1726 Opt_WarnUnusedImports,
1727 Opt_WarnIncompletePatterns,
1728 Opt_WarnDodgyExports,
1729 Opt_WarnDodgyImports
1732 minusWallOpts :: [DynFlag]
1735 [ Opt_WarnTypeDefaults,
1736 Opt_WarnNameShadowing,
1737 Opt_WarnMissingSigs,
1740 Opt_WarnUnusedDoBind,
1744 -- minuswRemovesOpts should be every warning option
1745 minuswRemovesOpts :: [DynFlag]
1748 [Opt_WarnImplicitPrelude,
1749 Opt_WarnIncompletePatternsRecUpd,
1750 Opt_WarnMonomorphism,
1751 Opt_WarnUnrecognisedPragmas,
1752 Opt_WarnAutoOrphans,
1756 enableGlasgowExts :: DynP ()
1757 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1758 mapM_ setExtensionFlag glasgowExtsFlags
1760 disableGlasgowExts :: DynP ()
1761 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1762 mapM_ unSetExtensionFlag glasgowExtsFlags
1764 glasgowExtsFlags :: [ExtensionFlag]
1765 glasgowExtsFlags = [
1766 Opt_ForeignFunctionInterface
1767 , Opt_UnliftedFFITypes
1768 , Opt_ImplicitParams
1769 , Opt_ScopedTypeVariables
1771 , Opt_TypeSynonymInstances
1772 , Opt_StandaloneDeriving
1773 , Opt_DeriveDataTypeable
1775 , Opt_DeriveFoldable
1776 , Opt_DeriveTraversable
1777 , Opt_FlexibleContexts
1778 , Opt_FlexibleInstances
1779 , Opt_ConstrainedClassMethods
1780 , Opt_MultiParamTypeClasses
1781 , Opt_FunctionalDependencies
1783 , Opt_PolymorphicComponents
1784 , Opt_ExistentialQuantification
1786 , Opt_PostfixOperators
1788 , Opt_LiberalTypeSynonyms
1792 , Opt_ParallelListComp
1793 , Opt_EmptyDataDecls
1794 , Opt_KindSignatures
1795 , Opt_GeneralizedNewtypeDeriving ]
1798 -- Consult the RTS to find whether GHC itself has been built profiled
1799 -- If so, you can't use Template Haskell
1800 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1802 rtsIsProfiled :: Bool
1803 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1805 checkTemplateHaskellOk :: Bool -> DynP ()
1806 checkTemplateHaskellOk turn_on
1807 | turn_on && rtsIsProfiled
1808 = addErr "You can't use Template Haskell with a profiled compiler"
1812 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1813 -- so we simply say "ok". It doesn't matter because TH isn't
1814 -- available in stage 1 anyway.
1815 checkTemplateHaskellOk turn_on = return ()
1818 {- **********************************************************************
1820 DynFlags constructors
1822 %********************************************************************* -}
1824 type DynP = EwM (CmdLineP DynFlags)
1826 upd :: (DynFlags -> DynFlags) -> DynP ()
1827 upd f = liftEwM (do { dfs <- getCmdLineState
1828 ; putCmdLineState $! (f dfs) })
1830 --------------- Constructor functions for OptKind -----------------
1831 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1832 noArg fn = NoArg (upd fn)
1834 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1835 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1837 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1838 hasArg fn = HasArg (upd . fn)
1840 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1841 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1842 ; deprecate deprec })
1844 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1845 intSuffix fn = IntSuffix (\n -> upd (fn n))
1847 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1848 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1850 --------------------------
1851 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1852 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1853 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1855 --------------------------
1856 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1857 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1858 ; mapM_ setExtensionFlag deps }
1860 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1861 -- When you set f, set the ones it implies
1862 -- NB: use setExtensionFlag recursively, in case the implied flags
1863 -- implies further flags
1864 -- When you un-set f, however, we don't un-set the things it implies
1865 -- (except for -fno-glasgow-exts, which is treated specially)
1867 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1869 --------------------------
1870 setDumpFlag' :: DynFlag -> DynP ()
1871 setDumpFlag' dump_flag
1872 = do { setDynFlag dump_flag
1873 ; when want_recomp forceRecompile }
1875 -- Certain dumpy-things are really interested in what's going
1876 -- on during recompilation checking, so in those cases we
1877 -- don't want to turn it off.
1878 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1879 Opt_D_dump_hi_diffs]
1881 forceRecompile :: DynP ()
1882 -- Whenver we -ddump, force recompilation (by switching off the
1883 -- recompilation checker), else you don't see the dump! However,
1884 -- don't switch it off in --make mode, else *everything* gets
1885 -- recompiled which probably isn't what you want
1886 forceRecompile = do { dfs <- liftEwM getCmdLineState
1887 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1889 force_recomp dfs = isOneShot (ghcMode dfs)
1891 setVerboseCore2Core :: DynP ()
1892 setVerboseCore2Core = do forceRecompile
1893 setDynFlag Opt_D_verbose_core2core
1894 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1897 setDumpSimplPhases :: String -> DynP ()
1898 setDumpSimplPhases s = do forceRecompile
1899 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1901 spec = case s of { ('=' : s') -> s'; _ -> s }
1903 setVerbosity :: Maybe Int -> DynP ()
1904 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1906 addCmdlineHCInclude :: String -> DynP ()
1907 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1909 extraPkgConf_ :: FilePath -> DynP ()
1910 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1912 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1914 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1916 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1918 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1920 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1922 setPackageName :: String -> DynFlags -> DynFlags
1923 setPackageName p s = s{ thisPackage = stringToPackageId p }
1925 -- If we're linking a binary, then only targets that produce object
1926 -- code are allowed (requests for other target types are ignored).
1927 setTarget :: HscTarget -> DynP ()
1928 setTarget l = upd set
1931 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1934 -- Changes the target only if we're compiling object code. This is
1935 -- used by -fasm and -fvia-C, which switch from one to the other, but
1936 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1937 -- can be safely used in an OPTIONS_GHC pragma.
1938 setObjTarget :: HscTarget -> DynP ()
1939 setObjTarget l = upd set
1942 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1945 setOptLevel :: Int -> DynFlags -> DynFlags
1946 setOptLevel n dflags
1947 | hscTarget dflags == HscInterpreted && n > 0
1949 -- not in IO any more, oh well:
1950 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1952 = updOptLevel n dflags
1955 -- -Odph is equivalent to
1957 -- -O2 optimise as much as possible
1958 -- -fno-method-sharing sharing specialisation defeats fusion
1960 -- -fdicts-cheap always inline dictionaries
1961 -- -fmax-simplifier-iterations20 this is necessary sometimes
1962 -- -fsimplifier-phases=3 we use an additional simplifier phase
1964 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1965 -- -fno-spec-constr-count SpecConstr as much as possible
1966 -- -finline-enough-args hack to prevent excessive inlining
1968 setDPHOpt :: DynFlags -> DynFlags
1969 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1971 , specConstrThreshold = Nothing
1972 , specConstrCount = Nothing
1974 `dopt_set` Opt_DictsCheap
1976 data DPHBackend = DPHPar
1979 deriving(Eq, Ord, Enum, Show)
1981 setDPHBackend :: DPHBackend -> DynP ()
1982 setDPHBackend backend
1984 upd $ \dflags -> dflags { dphBackend = backend }
1985 mapM_ exposePackage (dph_packages backend)
1987 dph_packages DPHThis = []
1988 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1989 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1991 dphPackage :: DynFlags -> PackageId
1992 dphPackage dflags = case dphBackend dflags of
1993 DPHPar -> dphParPackageId
1994 DPHSeq -> dphSeqPackageId
1995 DPHThis -> thisPackage dflags
1997 setMainIs :: String -> DynP ()
1999 | not (null main_fn) && isLower (head main_fn)
2000 -- The arg looked like "Foo.Bar.baz"
2001 = upd $ \d -> d{ mainFunIs = Just main_fn,
2002 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2004 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2005 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2007 | otherwise -- The arg looked like "baz"
2008 = upd $ \d -> d{ mainFunIs = Just arg }
2010 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2012 -----------------------------------------------------------------------------
2013 -- Paths & Libraries
2015 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2017 -- -i on its own deletes the import paths
2018 addImportPath "" = upd (\s -> s{importPaths = []})
2019 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2023 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2026 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2028 addFrameworkPath p =
2029 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2031 #ifndef mingw32_TARGET_OS
2032 split_marker :: Char
2033 split_marker = ':' -- not configurable (ToDo)
2036 splitPathList :: String -> [String]
2037 splitPathList s = filter notNull (splitUp s)
2038 -- empty paths are ignored: there might be a trailing
2039 -- ':' in the initial list, for example. Empty paths can
2040 -- cause confusion when they are translated into -I options
2041 -- for passing to gcc.
2043 #ifndef mingw32_TARGET_OS
2044 splitUp xs = split split_marker xs
2046 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2048 -- That is, if "foo:bar:baz" is used, this interpreted as
2049 -- consisting of three entries, 'foo', 'bar', 'baz'.
2050 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2051 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2053 -- Notice that no attempt is made to fully replace the 'standard'
2054 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2055 -- that this will cause too much breakage for users & ':' will
2056 -- work fine even with DOS paths, if you're not insisting on being silly.
2059 splitUp (x:':':div:xs) | div `elem` dir_markers
2060 = ((x:':':div:p): splitUp rs)
2062 (p,rs) = findNextPath xs
2063 -- we used to check for existence of the path here, but that
2064 -- required the IO monad to be threaded through the command-line
2065 -- parser which is quite inconvenient. The
2066 splitUp xs = cons p (splitUp rs)
2068 (p,rs) = findNextPath xs
2073 -- will be called either when we've consumed nought or the
2074 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2075 -- finding the next split marker.
2077 case break (`elem` split_markers) xs of
2078 (p, _:ds) -> (p, ds)
2081 split_markers :: [Char]
2082 split_markers = [':', ';']
2084 dir_markers :: [Char]
2085 dir_markers = ['/', '\\']
2088 -- -----------------------------------------------------------------------------
2089 -- tmpDir, where we store temporary files.
2091 setTmpDir :: FilePath -> DynFlags -> DynFlags
2092 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2093 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2094 -- seem necessary now --SDM 7/2/2008
2096 -----------------------------------------------------------------------------
2099 setRtsOpts :: String -> DynP ()
2100 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2102 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2103 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2105 -----------------------------------------------------------------------------
2108 setOptHpcDir :: String -> DynP ()
2109 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2111 -----------------------------------------------------------------------------
2112 -- Via-C compilation stuff
2114 -- There are some options that we need to pass to gcc when compiling
2115 -- Haskell code via C, but are only supported by recent versions of
2116 -- gcc. The configure script decides which of these options we need,
2117 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2118 -- read before each via-C compilation. The advantage of having these
2119 -- in a separate file is that the file can be created at install-time
2120 -- depending on the available gcc version, and even re-generated later
2121 -- if gcc is upgraded.
2123 -- The options below are not dependent on the version of gcc, only the
2126 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2127 [String]) -- for registerised HC compilations
2128 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2129 in (cCcOpts ++ flagsAll, flagsRegHc)
2131 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2132 [String]) -- for registerised HC compilations
2133 machdepCCOpts' _dflags
2134 #if alpha_TARGET_ARCH
2136 #ifdef HAVE_THREADED_RTS_SUPPORT
2140 -- For now, to suppress the gcc warning "call-clobbered
2141 -- register used for global register variable", we simply
2142 -- disable all warnings altogether using the -w flag. Oh well.
2144 #elif hppa_TARGET_ARCH
2145 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2146 -- (very nice, but too bad the HP /usr/include files don't agree.)
2147 = ( ["-D_HPUX_SOURCE"], [] )
2149 #elif m68k_TARGET_ARCH
2150 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2151 -- popping of args to routines to be explicit; if we let things
2152 -- be deferred 'til after an STGJUMP, imminent death is certain!
2154 -- -fomit-frame-pointer : *don't*
2155 -- It's better to have a6 completely tied up being a frame pointer
2156 -- rather than let GCC pick random things to do with it.
2157 -- (If we want to steal a6, then we would try to do things
2158 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2159 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2161 #elif i386_TARGET_ARCH
2162 -- -fno-defer-pop : basically the same game as for m68k
2164 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2165 -- the fp (%ebp) for our register maps.
2166 = let n_regs = stolen_x86_regs _dflags
2169 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2172 "-fomit-frame-pointer",
2173 -- we want -fno-builtin, because when gcc inlines
2174 -- built-in functions like memcpy() it tends to
2175 -- run out of registers, requiring -monly-n-regs
2177 "-DSTOLEN_X86_REGS="++show n_regs ]
2180 #elif ia64_TARGET_ARCH
2181 = ( [], ["-fomit-frame-pointer", "-G0"] )
2183 #elif x86_64_TARGET_ARCH
2186 ["-fomit-frame-pointer",
2187 "-fno-asynchronous-unwind-tables",
2188 -- the unwind tables are unnecessary for HC code,
2189 -- and get in the way of -split-objs. Another option
2190 -- would be to throw them away in the mangler, but this
2193 -- calling builtins like strlen() using the FFI can
2194 -- cause gcc to run out of regs, so use the external
2198 #elif sparc_TARGET_ARCH
2200 -- For now, to suppress the gcc warning "call-clobbered
2201 -- register used for global register variable", we simply
2202 -- disable all warnings altogether using the -w flag. Oh well.
2204 #elif powerpc_apple_darwin_TARGET
2206 -- Disable Apple's precompiling preprocessor. It's a great thing
2207 -- for "normal" programs, but it doesn't support register variable
2209 = ( [], ["-no-cpp-precomp"] )
2214 picCCOpts :: DynFlags -> [String]
2216 #if darwin_TARGET_OS
2217 -- Apple prefers to do things the other way round.
2218 -- PIC is on by default.
2219 -- -mdynamic-no-pic:
2220 -- Turn off PIC code generation.
2222 -- Don't generate "common" symbols - these are unwanted
2223 -- in dynamic libraries.
2226 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2228 = ["-mdynamic-no-pic"]
2229 #elif mingw32_TARGET_OS
2230 -- no -fPIC for Windows
2232 = ["-U __PIC__","-D__PIC__"]
2236 -- we need -fPIC for C files when we are compiling with -dynamic,
2237 -- otherwise things like stub.c files don't get compiled
2238 -- correctly. They need to reference data in the Haskell
2239 -- objects, but can't without -fPIC. See
2240 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2241 | opt_PIC || not opt_Static
2242 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2247 -- -----------------------------------------------------------------------------
2251 can_split = cSplitObjs == "YES"
2253 -- -----------------------------------------------------------------------------
2256 data Printable = String String
2257 | FromDynFlags (DynFlags -> String)
2259 compilerInfo :: [(String, Printable)]
2260 compilerInfo = [("Project name", String cProjectName),
2261 ("Project version", String cProjectVersion),
2262 ("Booter version", String cBooterVersion),
2263 ("Stage", String cStage),
2264 ("Build platform", String cBuildPlatform),
2265 ("Host platform", String cHostPlatform),
2266 ("Target platform", String cTargetPlatform),
2267 ("Have interpreter", String cGhcWithInterpreter),
2268 ("Object splitting", String cSplitObjs),
2269 ("Have native code generator", String cGhcWithNativeCodeGen),
2270 ("Have llvm code generator", String cGhcWithLlvmCodeGen),
2271 ("Use archives for ghci", String (show cUseArchivesForGhci)),
2272 ("Support SMP", String cGhcWithSMP),
2273 ("Unregisterised", String cGhcUnregisterised),
2274 ("Tables next to code", String cGhcEnableTablesNextToCode),
2275 ("RTS ways", String cGhcRTSWays),
2276 ("Leading underscore", String cLeadingUnderscore),
2277 ("Debug on", String (show debugIsOn)),
2278 ("LibDir", FromDynFlags topDir),
2279 ("Global Package DB", FromDynFlags systemPackageConfig)