2 {-# OPTIONS -fno-warn-missing-fields #-}
4 -- The above warning supression flag is a temporary kludge.
5 -- While working on this module you are encouraged to remove it and fix
6 -- any warnings in the module. See
7 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
10 -----------------------------------------------------------------------------
14 -- Most flags are dynamic flags, which means they can change from
15 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
16 -- multi-session GHC each session can be using different dynamic
17 -- flags. Dynamic flags can also be set at the prompt in GHCi.
19 -- (c) The University of Glasgow 2005
21 -----------------------------------------------------------------------------
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
34 -- Configuration of the core-to-core and stg-to-stg phases
38 SimplifierMode(..), FloatOutSwitches(..),
39 getCoreToDo, getStgToDo,
41 -- Manipulating DynFlags
42 defaultDynFlags, -- DynFlags
43 initDynFlags, -- DynFlags -> IO DynFlags
45 dopt, -- DynFlag -> DynFlags -> Bool
46 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
47 getOpts, -- (DynFlags -> [a]) -> IO [a]
58 machdepCCOpts, picCCOpts,
63 #include "HsVersions.h"
67 import PrelNames ( mAIN )
68 #ifdef i386_TARGET_ARCH
69 import StaticFlags ( opt_Static )
71 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
73 import {-# SOURCE #-} Packages (PackageState)
74 import DriverPhases ( Phase(..), phaseInputExt )
77 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
78 import Panic ( panic, GhcException(..) )
79 import UniqFM ( UniqFM )
81 import Maybes ( orElse, fromJust )
82 import SrcLoc ( SrcSpan )
84 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
86 import Data.IORef ( readIORef )
87 import Control.Exception ( throwDyn )
88 import Control.Monad ( when )
89 #ifdef mingw32_TARGET_OS
90 import Data.List ( isPrefixOf )
96 import System.IO ( hPutStrLn, stderr )
98 -- -----------------------------------------------------------------------------
106 | Opt_D_dump_cmmz_pretty
110 | Opt_D_dump_asm_native
111 | Opt_D_dump_asm_liveness
112 | Opt_D_dump_asm_coalesce
113 | Opt_D_dump_asm_regalloc
114 | Opt_D_dump_asm_regalloc_stages
115 | Opt_D_dump_asm_conflicts
116 | Opt_D_dump_asm_stats
122 | Opt_D_dump_inlinings
123 | Opt_D_dump_rule_firings
124 | Opt_D_dump_occur_anal
128 | Opt_D_dump_simpl_iterations
129 | Opt_D_dump_simpl_phases
138 | Opt_D_dump_worker_wrapper
139 | Opt_D_dump_rn_trace
140 | Opt_D_dump_rn_stats
142 | Opt_D_dump_simpl_stats
143 | Opt_D_dump_tc_trace
144 | Opt_D_dump_if_trace
150 | Opt_D_verbose_core2core
151 | Opt_D_verbose_stg2stg
153 | Opt_D_dump_hi_diffs
154 | Opt_D_dump_minimal_imports
155 | Opt_D_dump_mod_cycles
156 | Opt_D_dump_view_pattern_commoning
157 | Opt_D_faststring_stats
158 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
164 | Opt_WarnIsError -- -Werror; makes warnings fatal
165 | Opt_WarnDuplicateExports
167 | Opt_WarnImplicitPrelude
168 | Opt_WarnIncompletePatterns
169 | Opt_WarnIncompletePatternsRecUpd
170 | Opt_WarnMissingFields
171 | Opt_WarnMissingMethods
172 | Opt_WarnMissingSigs
173 | Opt_WarnNameShadowing
174 | Opt_WarnOverlappingPatterns
175 | Opt_WarnSimplePatterns
176 | Opt_WarnTypeDefaults
177 | Opt_WarnMonomorphism
178 | Opt_WarnUnusedBinds
179 | Opt_WarnUnusedImports
180 | Opt_WarnUnusedMatches
181 | Opt_WarnDeprecations
182 | Opt_WarnDodgyImports
187 | Opt_OverlappingInstances
188 | Opt_UndecidableInstances
189 | Opt_IncoherentInstances
190 | Opt_MonomorphismRestriction
192 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
193 | Opt_ForeignFunctionInterface
194 | Opt_UnliftedFFITypes
195 | Opt_PArr -- Syntactic support for parallel arrays
196 | Opt_Arrows -- Arrow-notation syntax
197 | Opt_TemplateHaskell
200 | Opt_ImplicitPrelude
201 | Opt_ScopedTypeVariables
205 | Opt_OverloadedStrings
206 | Opt_DisambiguateRecordFields
207 | Opt_RecordWildCards
212 | Opt_StandaloneDeriving
213 | Opt_DeriveDataTypeable
214 | Opt_TypeSynonymInstances
215 | Opt_FlexibleContexts
216 | Opt_FlexibleInstances
217 | Opt_ConstrainedClassMethods
218 | Opt_MultiParamTypeClasses
219 | Opt_FunctionalDependencies
221 | Opt_PolymorphicComponents
222 | Opt_ExistentialQuantification
226 | Opt_PatternSignatures
227 | Opt_ParallelListComp
228 | Opt_TransformListComp
229 | Opt_GeneralizedNewtypeDeriving
232 | Opt_LiberalTypeSynonyms
237 | Opt_PrintExplicitForalls
245 | Opt_IgnoreInterfacePragmas
246 | Opt_OmitInterfacePragmas
247 | Opt_DoLambdaEtaExpansion
251 | Opt_UnboxStrictFields
255 | Opt_RegsGraph -- do graph coloring register allocation
256 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
264 | Opt_ExcessPrecision
265 | Opt_ReadUserPackageConf
269 | Opt_HideAllPackages
270 | Opt_PrintBindResult
274 | Opt_BreakOnException
276 | Opt_PrintEvldWithShow
277 | Opt_PrintBindContents
281 | Opt_ConvertToZipCfgAndBack
292 data DynFlags = DynFlags {
295 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
296 stgToDo :: Maybe [StgToDo], -- similarly
297 hscTarget :: HscTarget,
298 hscOutName :: String, -- name of the output file
299 extCoreName :: String, -- name of the .core output file
300 verbosity :: Int, -- verbosity level
301 optLevel :: Int, -- optimisation level
302 maxSimplIterations :: Int, -- max simplifier iterations
303 ruleCheck :: Maybe String,
305 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
306 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
308 stolen_x86_regs :: Int,
309 cmdlineHcIncludes :: [String], -- -#includes
310 importPaths :: [FilePath],
312 mainFunIs :: Maybe String,
313 ctxtStkDepth :: Int, -- Typechecker context stack depth
315 thisPackage :: PackageId,
318 wayNames :: [WayName], -- way flags from the cmd line
319 buildTag :: String, -- the global "way" (eg. "p" for prof)
320 rtsBuildTag :: String, -- the RTS "way"
323 objectDir :: Maybe String,
324 hiDir :: Maybe String,
325 stubDir :: Maybe String,
331 outputFile :: Maybe String,
332 outputHi :: Maybe String,
334 -- | This is set by DriverPipeline.runPipeline based on where
335 -- its output is going.
336 dumpPrefix :: Maybe FilePath,
338 -- | Override the dumpPrefix set by runPipeline.
339 -- Set by -ddump-file-prefix
340 dumpPrefixForce :: Maybe FilePath,
342 includePaths :: [String],
343 libraryPaths :: [String],
344 frameworkPaths :: [String], -- used on darwin only
345 cmdlineFrameworks :: [String], -- ditto
346 tmpDir :: String, -- no trailing '/'
348 ghcUsagePath :: FilePath, -- Filled in by SysTools
349 ghciUsagePath :: FilePath, -- ditto
351 hpcDir :: String, -- ^ path to store the .mix files
353 -- options for particular phases
362 opt_windres :: [String],
364 -- commands for particular phases
366 pgm_P :: (String,[Option]),
368 pgm_c :: (String,[Option]),
369 pgm_m :: (String,[Option]),
370 pgm_s :: (String,[Option]),
371 pgm_a :: (String,[Option]),
372 pgm_l :: (String,[Option]),
373 pgm_dll :: (String,[Option]),
375 pgm_sysman :: String,
376 pgm_windres :: String,
379 extraPkgConfs :: [FilePath],
380 topDir :: FilePath, -- filled in by SysTools
381 systemPackageConfig :: FilePath, -- ditto
382 -- The -package-conf flags given on the command line, in the order
385 packageFlags :: [PackageFlag],
386 -- The -package and -hide-package flags from the command-line
389 -- NB. do not modify this field, it is calculated by
390 -- Packages.initPackages and Packages.updatePackages.
391 pkgDatabase :: Maybe (UniqFM PackageConfig),
392 pkgState :: PackageState,
398 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
400 haddockOptions :: Maybe String
411 -- | will this target result in an object file on the disk?
412 isObjectTarget :: HscTarget -> Bool
413 isObjectTarget HscC = True
414 isObjectTarget HscAsm = True
415 isObjectTarget _ = False
417 -- | The 'GhcMode' tells us whether we're doing multi-module
418 -- compilation (controlled via the "GHC" API) or one-shot
419 -- (single-module) compilation. This makes a difference primarily to
420 -- the "Finder": in one-shot mode we look for interface files for
421 -- imported modules, but in multi-module mode we look for source files
422 -- in order to check whether they need to be recompiled.
424 = CompManager -- ^ --make, GHCi, etc.
425 | OneShot -- ^ ghc -c Foo.hs
426 | MkDepend -- ^ ghc -M, see Finder for why we need this
429 isOneShot :: GhcMode -> Bool
430 isOneShot OneShot = True
431 isOneShot _other = False
433 -- | What kind of linking to do.
434 data GhcLink -- What to do in the link step, if there is one
435 = NoLink -- Don't link at all
436 | LinkBinary -- Link object code into a binary
437 | LinkInMemory -- Use the in-memory dynamic linker
438 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
441 isNoLink :: GhcLink -> Bool
442 isNoLink NoLink = True
443 isNoLink other = False
446 = ExposePackage String
448 | IgnorePackage String
451 defaultHscTarget = defaultObjectTarget
453 -- | the 'HscTarget' value corresponding to the default way to create
454 -- object files on the current platform.
456 | cGhcWithNativeCodeGen == "YES" = HscAsm
459 initDynFlags dflags = do
460 -- someday these will be dynamic flags
461 ways <- readIORef v_Ways
462 build_tag <- readIORef v_Build_tag
463 rts_build_tag <- readIORef v_RTS_Build_tag
466 buildTag = build_tag,
467 rtsBuildTag = rts_build_tag
472 ghcMode = CompManager,
473 ghcLink = LinkBinary,
476 hscTarget = defaultHscTarget,
481 maxSimplIterations = 4,
483 specConstrThreshold = Just 200,
484 liberateCaseThreshold = Just 200,
486 cmdlineHcIncludes = [],
490 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
492 thisPackage = mainPackageId,
498 objectSuf = phaseInputExt StopLn,
499 hcSuf = phaseInputExt HCc,
502 outputFile = Nothing,
504 dumpPrefix = Nothing,
505 dumpPrefixForce = Nothing,
509 cmdlineFrameworks = [],
510 tmpDir = cDEFAULT_TMPDIR,
528 pkgDatabase = Nothing,
529 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
530 haddockOptions = Nothing,
532 Opt_ReadUserPackageConf,
534 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
535 -- behaviour the default, to see if anyone notices
539 Opt_MonomorphismRestriction,
545 Opt_PrintBindContents
547 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
548 -- The default -O0 options
551 log_action = \severity srcSpan style msg ->
553 SevInfo -> hPutStrLn stderr (show (msg style))
554 SevFatal -> hPutStrLn stderr (show (msg style))
555 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
561 0 | print errors & warnings only
562 1 | minimal verbosity: print "compiling M ... done." for each module.
563 2 | equivalent to -dshow-passes
564 3 | equivalent to existing "ghc -v"
565 4 | "ghc -v -ddump-most"
566 5 | "ghc -v -ddump-all"
569 dopt :: DynFlag -> DynFlags -> Bool
570 dopt f dflags = f `elem` (flags dflags)
572 dopt_set :: DynFlags -> DynFlag -> DynFlags
573 dopt_set dfs f = dfs{ flags = f : flags dfs }
575 dopt_unset :: DynFlags -> DynFlag -> DynFlags
576 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
578 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
579 getOpts dflags opts = reverse (opts dflags)
580 -- We add to the options from the front, so we need to reverse the list
582 getVerbFlag :: DynFlags -> String
584 | verbosity dflags >= 3 = "-v"
587 setObjectDir f d = d{ objectDir = Just f}
588 setHiDir f d = d{ hiDir = Just f}
589 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
590 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
591 -- #included from the .hc file when compiling with -fvia-C.
593 setObjectSuf f d = d{ objectSuf = f}
594 setHiSuf f d = d{ hiSuf = f}
595 setHcSuf f d = d{ hcSuf = f}
597 setOutputFile f d = d{ outputFile = f}
598 setOutputHi f d = d{ outputHi = f}
600 setDumpPrefixForce f d = d { dumpPrefixForce = f}
602 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
603 -- Config.hs should really use Option.
604 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
606 setPgmL f d = d{ pgm_L = f}
607 setPgmF f d = d{ pgm_F = f}
608 setPgmc f d = d{ pgm_c = (f,[])}
609 setPgmm f d = d{ pgm_m = (f,[])}
610 setPgms f d = d{ pgm_s = (f,[])}
611 setPgma f d = d{ pgm_a = (f,[])}
612 setPgml f d = d{ pgm_l = (f,[])}
613 setPgmdll f d = d{ pgm_dll = (f,[])}
614 setPgmwindres f d = d{ pgm_windres = f}
616 addOptL f d = d{ opt_L = f : opt_L d}
617 addOptP f d = d{ opt_P = f : opt_P d}
618 addOptF f d = d{ opt_F = f : opt_F d}
619 addOptc f d = d{ opt_c = f : opt_c d}
620 addOptm f d = d{ opt_m = f : opt_m d}
621 addOpta f d = d{ opt_a = f : opt_a d}
622 addOptl f d = d{ opt_l = f : opt_l d}
623 addOptdep f d = d{ opt_dep = f : opt_dep d}
624 addOptwindres f d = d{ opt_windres = f : opt_windres d}
626 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
628 addHaddockOpts f d = d{ haddockOptions = Just f}
630 -- -----------------------------------------------------------------------------
631 -- Command-line options
633 -- When invoking external tools as part of the compilation pipeline, we
634 -- pass these a sequence of options on the command-line. Rather than
635 -- just using a list of Strings, we use a type that allows us to distinguish
636 -- between filepaths and 'other stuff'. [The reason being, of course, that
637 -- this type gives us a handle on transforming filenames, and filenames only,
638 -- to whatever format they're expected to be on a particular platform.]
641 = FileOption -- an entry that _contains_ filename(s) / filepaths.
642 String -- a non-filepath prefix that shouldn't be
643 -- transformed (e.g., "/out=")
644 String -- the filepath/filename portion
647 -----------------------------------------------------------------------------
648 -- Setting the optimisation level
650 updOptLevel :: Int -> DynFlags -> DynFlags
651 -- Set dynflags appropriate to the optimisation level
653 = dfs2{ optLevel = final_n }
655 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
656 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
657 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
659 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
660 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
662 optLevelFlags :: [([Int], DynFlag)]
664 = [ ([0], Opt_IgnoreInterfacePragmas)
665 , ([0], Opt_OmitInterfacePragmas)
667 , ([1,2], Opt_IgnoreAsserts)
668 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
670 , ([1,2], Opt_DoEtaReduction)
671 , ([1,2], Opt_CaseMerge)
672 , ([1,2], Opt_Strictness)
674 , ([1,2], Opt_FullLaziness)
676 , ([2], Opt_LiberateCase)
677 , ([2], Opt_SpecConstr)
679 , ([0,1,2], Opt_DoLambdaEtaExpansion)
680 -- This one is important for a tiresome reason:
681 -- we want to make sure that the bindings for data
682 -- constructors are eta-expanded. This is probably
683 -- a good thing anyway, but it seems fragile.
686 -- -----------------------------------------------------------------------------
687 -- Standard sets of warning options
690 = [ Opt_WarnDeprecations,
691 Opt_WarnOverlappingPatterns,
692 Opt_WarnMissingFields,
693 Opt_WarnMissingMethods,
694 Opt_WarnDuplicateExports
698 = standardWarnings ++
699 [ Opt_WarnUnusedBinds,
700 Opt_WarnUnusedMatches,
701 Opt_WarnUnusedImports,
702 Opt_WarnIncompletePatterns,
708 [ Opt_WarnTypeDefaults,
709 Opt_WarnNameShadowing,
715 -- minuswRemovesOpts should be every warning option
718 [Opt_WarnImplicitPrelude,
719 Opt_WarnIncompletePatternsRecUpd,
720 Opt_WarnSimplePatterns,
721 Opt_WarnMonomorphism,
725 -- -----------------------------------------------------------------------------
726 -- CoreToDo: abstraction of core-to-core passes to run.
728 data CoreToDo -- These are diff core-to-core passes,
729 -- which may be invoked in any order,
730 -- as many times as you like.
732 = CoreDoSimplify -- The core-to-core simplifier.
735 -- Each run of the simplifier can take a different
736 -- set of simplifier-specific flags.
738 | CoreDoFloatOutwards FloatOutSwitches
743 | CoreDoWorkerWrapper
746 | CoreDoOldStrictness
749 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
750 -- matching this string
751 | CoreDoVectorisation
752 | CoreDoNothing -- Useful when building up
753 | CoreDoPasses [CoreToDo] -- lists of these things
755 data SimplifierMode -- See comments in SimplMonad
759 data SimplifierSwitch
760 = MaxSimplifierIterations Int
763 data FloatOutSwitches
764 = FloatOutSw Bool -- True <=> float lambdas to top level
765 Bool -- True <=> float constants to top level,
766 -- even if they do not escape a lambda
769 -- The core-to-core pass ordering is derived from the DynFlags:
770 runWhen :: Bool -> CoreToDo -> CoreToDo
771 runWhen True do_this = do_this
772 runWhen False do_this = CoreDoNothing
774 getCoreToDo :: DynFlags -> [CoreToDo]
776 | Just todo <- coreToDo dflags = todo -- set explicitly by user
777 | otherwise = core_todo
779 opt_level = optLevel dflags
780 max_iter = maxSimplIterations dflags
781 strictness = dopt Opt_Strictness dflags
782 full_laziness = dopt Opt_FullLaziness dflags
783 cse = dopt Opt_CSE dflags
784 spec_constr = dopt Opt_SpecConstr dflags
785 liberate_case = dopt Opt_LiberateCase dflags
786 rule_check = ruleCheck dflags
787 vectorisation = dopt Opt_Vectorise dflags
790 if opt_level == 0 then
792 CoreDoSimplify (SimplPhase 0) [
793 MaxSimplifierIterations max_iter
796 else {- opt_level >= 1 -} [
798 -- initial simplify: mk specialiser happy: minimum effort please
799 CoreDoSimplify SimplGently [
801 -- Don't inline anything till full laziness has bitten
802 -- In particular, inlining wrappers inhibits floating
803 -- e.g. ...(case f x of ...)...
804 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
805 -- ==> ...(case x of I# x# -> case fw x# of ...)...
806 -- and now the redex (f x) isn't floatable any more
807 -- Similarly, don't apply any rules until after full
808 -- laziness. Notably, list fusion can prevent floating.
810 NoCaseOfCase, -- Don't do case-of-case transformations.
811 -- This makes full laziness work better
812 MaxSimplifierIterations max_iter
816 -- We run vectorisation here for now, but we might also try to run
818 runWhen vectorisation (CoreDoPasses [
820 CoreDoSimplify SimplGently
822 MaxSimplifierIterations max_iter]]),
824 -- Specialisation is best done before full laziness
825 -- so that overloaded functions have all their dictionary lambdas manifest
828 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
832 CoreDoSimplify (SimplPhase 2) [
833 -- Want to run with inline phase 2 after the specialiser to give
834 -- maximum chance for fusion to work before we inline build/augment
835 -- in phase 1. This made a difference in 'ansi' where an
836 -- overloaded function wasn't inlined till too late.
837 MaxSimplifierIterations max_iter
839 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
841 CoreDoSimplify (SimplPhase 1) [
842 -- Need inline-phase2 here so that build/augment get
843 -- inlined. I found that spectral/hartel/genfft lost some useful
844 -- strictness in the function sumcode' if augment is not inlined
845 -- before strictness analysis runs
846 MaxSimplifierIterations max_iter
848 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
850 CoreDoSimplify (SimplPhase 0) [
851 -- Phase 0: allow all Ids to be inlined now
852 -- This gets foldr inlined before strictness analysis
854 MaxSimplifierIterations (max max_iter 3)
855 -- At least 3 iterations because otherwise we land up with
856 -- huge dead expressions because of an infelicity in the
858 -- let k = BIG in foldr k z xs
859 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
860 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
864 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
866 #ifdef OLD_STRICTNESS
869 runWhen strictness (CoreDoPasses [
873 CoreDoSimplify (SimplPhase 0) [
874 MaxSimplifierIterations max_iter
877 runWhen full_laziness
878 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
879 True)), -- Float constants
880 -- nofib/spectral/hartel/wang doubles in speed if you
881 -- do full laziness late in the day. It only happens
882 -- after fusion and other stuff, so the early pass doesn't
883 -- catch it. For the record, the redex is
884 -- f_el22 (f_el21 r_midblock)
888 -- We want CSE to follow the final full-laziness pass, because it may
889 -- succeed in commoning up things floated out by full laziness.
890 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
894 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
896 -- Case-liberation for -O2. This should be after
897 -- strictness analysis and the simplification which follows it.
898 runWhen liberate_case (CoreDoPasses [
900 CoreDoSimplify (SimplPhase 0) [
901 MaxSimplifierIterations max_iter
902 ] ]), -- Run the simplifier after LiberateCase to vastly
903 -- reduce the possiblility of shadowing
904 -- Reason: see Note [Shadowing] in SpecConstr.lhs
906 runWhen spec_constr CoreDoSpecConstr,
908 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
910 -- Final clean-up simplification:
911 CoreDoSimplify (SimplPhase 0) [
912 MaxSimplifierIterations max_iter
915 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing }
919 -- -----------------------------------------------------------------------------
920 -- StgToDo: abstraction of stg-to-stg passes to run.
923 = StgDoMassageForProfiling -- should be (next to) last
924 -- There's also setStgVarInfo, but its absolute "lastness"
925 -- is so critical that it is hardwired in (no flag).
928 getStgToDo :: DynFlags -> [StgToDo]
930 | Just todo <- stgToDo dflags = todo -- set explicitly by user
933 stg_stats = dopt Opt_StgStats dflags
935 todo1 = if stg_stats then [D_stg_stats] else []
937 todo2 | WayProf `elem` wayNames dflags
938 = StgDoMassageForProfiling : todo1
942 -- -----------------------------------------------------------------------------
946 allFlags = map ('-':) $
947 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
948 map ("fno-"++) flags ++
952 where ok (PrefixPred _ _) = False
954 flags = map fst fFlags
957 dynamic_flags :: [(String, OptKind DynP)]
959 ( "n" , NoArg (setDynFlag Opt_DryRun) )
960 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
961 , ( "F" , NoArg (setDynFlag Opt_Pp))
962 , ( "#include" , HasArg (addCmdlineHCInclude) )
963 , ( "v" , OptIntSuffix setVerbosity )
965 ------- Specific phases --------------------------------------------
966 , ( "pgmL" , HasArg (upd . setPgmL) )
967 , ( "pgmP" , HasArg (upd . setPgmP) )
968 , ( "pgmF" , HasArg (upd . setPgmF) )
969 , ( "pgmc" , HasArg (upd . setPgmc) )
970 , ( "pgmm" , HasArg (upd . setPgmm) )
971 , ( "pgms" , HasArg (upd . setPgms) )
972 , ( "pgma" , HasArg (upd . setPgma) )
973 , ( "pgml" , HasArg (upd . setPgml) )
974 , ( "pgmdll" , HasArg (upd . setPgmdll) )
975 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
977 , ( "optL" , HasArg (upd . addOptL) )
978 , ( "optP" , HasArg (upd . addOptP) )
979 , ( "optF" , HasArg (upd . addOptF) )
980 , ( "optc" , HasArg (upd . addOptc) )
981 , ( "optm" , HasArg (upd . addOptm) )
982 , ( "opta" , HasArg (upd . addOpta) )
983 , ( "optl" , HasArg (upd . addOptl) )
984 , ( "optdep" , HasArg (upd . addOptdep) )
985 , ( "optwindres" , HasArg (upd . addOptwindres) )
987 , ( "split-objs" , NoArg (if can_split
988 then setDynFlag Opt_SplitObjs
991 -------- Linking ----------------------------------------------------
992 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
993 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
994 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
996 ------- Libraries ---------------------------------------------------
997 , ( "L" , Prefix addLibraryPath )
998 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
1000 ------- Frameworks --------------------------------------------------
1001 -- -framework-path should really be -F ...
1002 , ( "framework-path" , HasArg addFrameworkPath )
1003 , ( "framework" , HasArg (upd . addCmdlineFramework) )
1005 ------- Output Redirection ------------------------------------------
1006 , ( "odir" , HasArg (upd . setObjectDir))
1007 , ( "o" , SepArg (upd . setOutputFile . Just))
1008 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
1009 , ( "osuf" , HasArg (upd . setObjectSuf))
1010 , ( "hcsuf" , HasArg (upd . setHcSuf))
1011 , ( "hisuf" , HasArg (upd . setHiSuf))
1012 , ( "hidir" , HasArg (upd . setHiDir))
1013 , ( "tmpdir" , HasArg (upd . setTmpDir))
1014 , ( "stubdir" , HasArg (upd . setStubDir))
1015 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
1017 ------- Keeping temporary files -------------------------------------
1018 -- These can be singular (think ghc -c) or plural (think ghc --make)
1019 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
1020 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
1021 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
1022 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1023 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1024 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1025 -- This only makes sense as plural
1026 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1028 ------- Miscellaneous ----------------------------------------------
1029 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1030 , ( "main-is" , SepArg setMainIs )
1031 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1032 , ( "haddock-opts" , HasArg (upd . addHaddockOpts))
1033 , ( "hpcdir" , SepArg setOptHpcDir )
1035 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1036 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1037 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1039 ------- Packages ----------------------------------------------------
1040 , ( "package-conf" , HasArg extraPkgConf_ )
1041 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1042 , ( "package-name" , HasArg (upd . setPackageName) )
1043 , ( "package" , HasArg exposePackage )
1044 , ( "hide-package" , HasArg hidePackage )
1045 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1046 , ( "ignore-package" , HasArg ignorePackage )
1047 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1049 ------ HsCpp opts ---------------------------------------------------
1050 , ( "D", AnySuffix (upd . addOptP) )
1051 , ( "U", AnySuffix (upd . addOptP) )
1053 ------- Include/Import Paths ----------------------------------------
1054 , ( "I" , Prefix addIncludePath)
1055 , ( "i" , OptPrefix addImportPath )
1057 ------ Debugging ----------------------------------------------------
1058 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1060 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1061 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1062 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1063 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1064 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1065 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1066 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1067 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1068 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1069 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1070 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1071 , ( "ddump-asm-regalloc-stages",
1072 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1073 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1074 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1075 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1076 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1077 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1078 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1079 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1080 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1081 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1082 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1083 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1084 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1085 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1086 , ( "ddump-simpl-phases", setDumpFlag Opt_D_dump_simpl_phases)
1087 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1088 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1089 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1090 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1091 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1092 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1093 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1094 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1095 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1096 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1097 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1098 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1099 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1100 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1101 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1102 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1103 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1104 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1105 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1106 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1107 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1108 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1109 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1110 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1111 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1112 , ( "ddump-view-pattern-commoning", setDumpFlag Opt_D_dump_view_pattern_commoning)
1113 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1114 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1115 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1116 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1117 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1118 , ( "dasm-lint", NoArg (setDynFlag Opt_DoAsmLinting))
1119 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1120 setVerbosity (Just 2)) )
1121 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1123 ------ Machine dependant (-m<blah>) stuff ---------------------------
1125 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1126 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1127 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1129 ------ Warning opts -------------------------------------------------
1130 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1131 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1132 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1133 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1134 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1135 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1137 ------ Optimisation flags ------------------------------------------
1138 , ( "O" , NoArg (upd (setOptLevel 1)))
1139 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1140 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1141 -- If the number is missing, use 1
1143 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1144 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1146 , ( "fspec-constr-threshold", IntSuffix (\n ->
1147 upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1148 , ( "fno-spec-constr-threshold", NoArg (
1149 upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1150 , ( "fliberate-case-threshold", IntSuffix (\n ->
1151 upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1152 , ( "fno-liberate-case-threshold", NoArg (
1153 upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1155 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1156 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1158 ------ Compiler flags -----------------------------------------------
1160 , ( "fasm", NoArg (setObjTarget HscAsm) )
1161 , ( "fvia-c", NoArg (setObjTarget HscC) )
1162 , ( "fvia-C", NoArg (setObjTarget HscC) )
1164 , ( "fno-code", NoArg (setTarget HscNothing))
1165 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1166 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1168 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1169 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1171 -- the rest of the -f* and -fno-* flags
1172 , ( "f", PrefixPred (isFlag fFlags)
1173 (\f -> setDynFlag (getFlag fFlags f)) )
1174 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1175 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1177 -- the -X* and -XNo* flags
1178 , ( "X", PrefixPred (isFlag xFlags)
1179 (\f -> setDynFlag (getFlag xFlags f)) )
1180 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1181 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1184 -- these -f<blah> flags can all be reversed with -fno-<blah>
1187 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1188 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1189 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1190 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1191 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1192 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1193 ( "warn-missing-fields", Opt_WarnMissingFields ),
1194 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1195 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1196 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1197 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1198 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1199 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1200 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1201 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1202 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1203 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1204 ( "warn-deprecations", Opt_WarnDeprecations ),
1205 ( "warn-orphans", Opt_WarnOrphans ),
1206 ( "warn-tabs", Opt_WarnTabs ),
1207 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1208 ( "strictness", Opt_Strictness ),
1209 ( "full-laziness", Opt_FullLaziness ),
1210 ( "liberate-case", Opt_LiberateCase ),
1211 ( "spec-constr", Opt_SpecConstr ),
1213 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1214 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1215 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1216 ( "ignore-asserts", Opt_IgnoreAsserts ),
1217 ( "do-eta-reduction", Opt_DoEtaReduction ),
1218 ( "case-merge", Opt_CaseMerge ),
1219 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1220 ( "dicts-cheap", Opt_DictsCheap ),
1221 ( "excess-precision", Opt_ExcessPrecision ),
1222 ( "asm-mangling", Opt_DoAsmMangling ),
1223 ( "print-bind-result", Opt_PrintBindResult ),
1224 ( "force-recomp", Opt_ForceRecomp ),
1225 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1226 ( "rewrite-rules", Opt_RewriteRules ),
1227 ( "break-on-exception", Opt_BreakOnException ),
1228 ( "break-on-error", Opt_BreakOnError ),
1229 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1230 ( "print-bind-contents", Opt_PrintBindContents ),
1231 ( "run-cps", Opt_RunCPSZ ),
1232 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1233 ( "vectorise", Opt_Vectorise ),
1234 ( "regs-graph", Opt_RegsGraph),
1235 ( "regs-iterative", Opt_RegsIterative),
1236 -- Deprecated in favour of -XTemplateHaskell:
1237 ( "th", Opt_TemplateHaskell ),
1238 -- Deprecated in favour of -XForeignFunctionInterface:
1239 ( "fi", Opt_ForeignFunctionInterface ),
1240 -- Deprecated in favour of -XForeignFunctionInterface:
1241 ( "ffi", Opt_ForeignFunctionInterface ),
1242 -- Deprecated in favour of -XArrows:
1243 ( "arrows", Opt_Arrows ),
1244 -- Deprecated in favour of -XGenerics:
1245 ( "generics", Opt_Generics ),
1246 -- Deprecated in favour of -XImplicitPrelude:
1247 ( "implicit-prelude", Opt_ImplicitPrelude ),
1248 -- Deprecated in favour of -XBangPatterns:
1249 ( "bang-patterns", Opt_BangPatterns ),
1250 -- Deprecated in favour of -XMonomorphismRestriction:
1251 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1252 -- Deprecated in favour of -XMonoPatBinds:
1253 ( "mono-pat-binds", Opt_MonoPatBinds ),
1254 -- Deprecated in favour of -XExtendedDefaultRules:
1255 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1256 -- Deprecated in favour of -XImplicitParams:
1257 ( "implicit-params", Opt_ImplicitParams ),
1258 -- Deprecated in favour of -XScopedTypeVariables:
1259 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1260 -- Deprecated in favour of -XPArr:
1261 ( "parr", Opt_PArr ),
1262 -- Deprecated in favour of -XOverlappingInstances:
1263 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1264 -- Deprecated in favour of -XUndecidableInstances:
1265 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1266 -- Deprecated in favour of -XIncoherentInstances:
1267 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1268 ( "gen-manifest", Opt_GenManifest ),
1269 ( "embed-manifest", Opt_EmbedManifest )
1272 supportedLanguages :: [String]
1273 supportedLanguages = map fst xFlags
1275 -- These -X<blah> flags can all be reversed with -XNo<blah>
1276 xFlags :: [(String, DynFlag)]
1279 ( "PatternGuards", Opt_PatternGuards ),
1280 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1281 ( "MagicHash", Opt_MagicHash ),
1282 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1283 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1284 ( "KindSignatures", Opt_KindSignatures ),
1285 ( "PatternSignatures", Opt_PatternSignatures ),
1286 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1287 ( "ParallelListComp", Opt_ParallelListComp ),
1288 ( "TransformListComp", Opt_TransformListComp ),
1289 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1290 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1291 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms ),
1292 ( "Rank2Types", Opt_Rank2Types ),
1293 ( "RankNTypes", Opt_RankNTypes ),
1294 ( "TypeOperators", Opt_TypeOperators ),
1295 ( "RecursiveDo", Opt_RecursiveDo ),
1296 ( "Arrows", Opt_Arrows ),
1297 ( "PArr", Opt_PArr ),
1298 ( "TemplateHaskell", Opt_TemplateHaskell ),
1299 ( "Generics", Opt_Generics ),
1301 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1302 ( "RecordWildCards", Opt_RecordWildCards ),
1303 ( "RecordPuns", Opt_RecordPuns ),
1304 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1305 ( "OverloadedStrings", Opt_OverloadedStrings ),
1306 ( "GADTs", Opt_GADTs ),
1307 ( "ViewPatterns", Opt_ViewPatterns),
1308 ( "TypeFamilies", Opt_TypeFamilies ),
1309 ( "BangPatterns", Opt_BangPatterns ),
1311 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1312 -- On by default (which is not strictly H98):
1313 ( "MonoPatBinds", Opt_MonoPatBinds ),
1314 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1315 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1316 ( "ImplicitParams", Opt_ImplicitParams ),
1317 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1318 ( "UnboxedTuples", Opt_UnboxedTuples ),
1319 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1320 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1321 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1322 ( "FlexibleContexts", Opt_FlexibleContexts ),
1323 ( "FlexibleInstances", Opt_FlexibleInstances ),
1324 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1325 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1326 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1327 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1328 ( "OverlappingInstances", Opt_OverlappingInstances ),
1329 ( "UndecidableInstances", Opt_UndecidableInstances ),
1330 ( "IncoherentInstances", Opt_IncoherentInstances )
1333 impliedFlags :: [(DynFlag, [DynFlag])]
1335 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1338 glasgowExtsFlags = [
1339 Opt_PrintExplicitForalls
1340 , Opt_ForeignFunctionInterface
1341 , Opt_UnliftedFFITypes
1343 , Opt_ImplicitParams
1344 , Opt_ScopedTypeVariables
1346 , Opt_TypeSynonymInstances
1347 , Opt_StandaloneDeriving
1348 , Opt_DeriveDataTypeable
1349 , Opt_FlexibleContexts
1350 , Opt_FlexibleInstances
1351 , Opt_ConstrainedClassMethods
1352 , Opt_MultiParamTypeClasses
1353 , Opt_FunctionalDependencies
1355 , Opt_PolymorphicComponents
1356 , Opt_ExistentialQuantification
1359 , Opt_LiberalTypeSynonyms
1363 , Opt_ParallelListComp
1364 , Opt_EmptyDataDecls
1365 , Opt_KindSignatures
1366 , Opt_PatternSignatures
1367 , Opt_GeneralizedNewtypeDeriving
1368 , Opt_TypeFamilies ]
1371 isFlag :: [(String,a)] -> String -> Bool
1372 isFlag flags f = any (\(ff,_) -> ff == f) flags
1374 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1375 isPrefFlag pref flags no_f
1376 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1380 getFlag :: [(String,a)] -> String -> a
1381 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1383 [] -> panic ("get_flag " ++ f)
1385 getPrefFlag :: String -> [(String,a)] -> String -> a
1386 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1387 -- We should only be passed flags which match the prefix
1389 -- -----------------------------------------------------------------------------
1390 -- Parsing the dynamic flags.
1392 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1393 parseDynamicFlags dflags args = do
1394 let ((leftover,errs),dflags')
1395 = runCmdLine (processArgs dynamic_flags args) dflags
1396 when (not (null errs)) $ do
1397 throwDyn (UsageError (unlines errs))
1398 return (dflags', leftover)
1401 type DynP = CmdLineP DynFlags
1403 upd :: (DynFlags -> DynFlags) -> DynP ()
1405 dfs <- getCmdLineState
1406 putCmdLineState $! (f dfs)
1408 --------------------------
1409 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1410 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1412 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1413 -- When you set f, set the ones it implies
1414 -- When you un-set f, however, we don't un-set the things it implies
1415 -- (except for -fno-glasgow-exts, which is treated specially)
1417 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1419 --------------------------
1420 setDumpFlag :: DynFlag -> OptKind DynP
1421 setDumpFlag dump_flag
1422 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1423 -- Whenver we -ddump, switch off the recompilation checker,
1424 -- else you don't see the dump!
1426 setVerbosity :: Maybe Int -> DynP ()
1427 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1429 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1431 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1434 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1436 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1438 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1441 | Nothing <- unpackPackageId pid
1442 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1444 = \s -> s{ thisPackage = pid }
1446 pid = stringToPackageId p
1448 -- If we're linking a binary, then only targets that produce object
1449 -- code are allowed (requests for other target types are ignored).
1450 setTarget l = upd set
1453 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1456 -- Changes the target only if we're compiling object code. This is
1457 -- used by -fasm and -fvia-C, which switch from one to the other, but
1458 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1459 -- can be safely used in an OPTIONS_GHC pragma.
1460 setObjTarget l = upd set
1463 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1466 setOptLevel :: Int -> DynFlags -> DynFlags
1467 setOptLevel n dflags
1468 | hscTarget dflags == HscInterpreted && n > 0
1470 -- not in IO any more, oh well:
1471 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1473 = updOptLevel n dflags
1476 setMainIs :: String -> DynP ()
1478 | not (null main_fn) && isLower (head main_fn)
1479 -- The arg looked like "Foo.Bar.baz"
1480 = upd $ \d -> d{ mainFunIs = Just main_fn,
1481 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1483 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1484 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1486 | otherwise -- The arg looked like "baz"
1487 = upd $ \d -> d{ mainFunIs = Just arg }
1489 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1491 -----------------------------------------------------------------------------
1492 -- Paths & Libraries
1494 -- -i on its own deletes the import paths
1495 addImportPath "" = upd (\s -> s{importPaths = []})
1496 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1500 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1503 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1505 addFrameworkPath p =
1506 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1508 split_marker = ':' -- not configurable (ToDo)
1510 splitPathList :: String -> [String]
1511 splitPathList s = filter notNull (splitUp s)
1512 -- empty paths are ignored: there might be a trailing
1513 -- ':' in the initial list, for example. Empty paths can
1514 -- cause confusion when they are translated into -I options
1515 -- for passing to gcc.
1517 #ifndef mingw32_TARGET_OS
1518 splitUp xs = split split_marker xs
1520 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1522 -- That is, if "foo:bar:baz" is used, this interpreted as
1523 -- consisting of three entries, 'foo', 'bar', 'baz'.
1524 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1525 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1527 -- Notice that no attempt is made to fully replace the 'standard'
1528 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1529 -- that this will cause too much breakage for users & ':' will
1530 -- work fine even with DOS paths, if you're not insisting on being silly.
1533 splitUp (x:':':div:xs) | div `elem` dir_markers
1534 = ((x:':':div:p): splitUp rs)
1536 (p,rs) = findNextPath xs
1537 -- we used to check for existence of the path here, but that
1538 -- required the IO monad to be threaded through the command-line
1539 -- parser which is quite inconvenient. The
1540 splitUp xs = cons p (splitUp rs)
1542 (p,rs) = findNextPath xs
1547 -- will be called either when we've consumed nought or the
1548 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1549 -- finding the next split marker.
1551 case break (`elem` split_markers) xs of
1552 (p, d:ds) -> (p, ds)
1555 split_markers :: [Char]
1556 split_markers = [':', ';']
1558 dir_markers :: [Char]
1559 dir_markers = ['/', '\\']
1562 -- -----------------------------------------------------------------------------
1563 -- tmpDir, where we store temporary files.
1565 setTmpDir :: FilePath -> DynFlags -> DynFlags
1566 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1568 #if !defined(mingw32_HOST_OS)
1569 canonicalise p = normalisePath p
1571 -- Canonicalisation of temp path under win32 is a bit more
1572 -- involved: (a) strip trailing slash,
1573 -- (b) normalise slashes
1574 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1576 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1578 -- if we're operating under cygwin, and TMP/TEMP is of
1579 -- the form "/cygdrive/drive/path", translate this to
1580 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1581 -- understand /cygdrive paths.)
1583 | "/cygdrive/" `isPrefixOf` path =
1584 case drop (length "/cygdrive/") path of
1585 drive:xs@('/':_) -> drive:':':xs
1589 -- strip the trailing backslash (awful, but we only do this once).
1590 removeTrailingSlash path =
1597 -----------------------------------------------------------------------------
1600 setOptHpcDir :: String -> DynP ()
1601 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1603 -----------------------------------------------------------------------------
1604 -- Via-C compilation stuff
1606 -- There are some options that we need to pass to gcc when compiling
1607 -- Haskell code via C, but are only supported by recent versions of
1608 -- gcc. The configure script decides which of these options we need,
1609 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1610 -- read before each via-C compilation. The advantage of having these
1611 -- in a separate file is that the file can be created at install-time
1612 -- depending on the available gcc version, and even re-generated later
1613 -- if gcc is upgraded.
1615 -- The options below are not dependent on the version of gcc, only the
1618 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1619 [String]) -- for registerised HC compilations
1620 machdepCCOpts dflags
1621 #if alpha_TARGET_ARCH
1623 #ifdef HAVE_THREADED_RTS_SUPPORT
1627 -- For now, to suppress the gcc warning "call-clobbered
1628 -- register used for global register variable", we simply
1629 -- disable all warnings altogether using the -w flag. Oh well.
1631 #elif hppa_TARGET_ARCH
1632 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1633 -- (very nice, but too bad the HP /usr/include files don't agree.)
1634 = ( ["-D_HPUX_SOURCE"], [] )
1636 #elif m68k_TARGET_ARCH
1637 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1638 -- popping of args to routines to be explicit; if we let things
1639 -- be deferred 'til after an STGJUMP, imminent death is certain!
1641 -- -fomit-frame-pointer : *don't*
1642 -- It's better to have a6 completely tied up being a frame pointer
1643 -- rather than let GCC pick random things to do with it.
1644 -- (If we want to steal a6, then we would try to do things
1645 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1646 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1648 #elif i386_TARGET_ARCH
1649 -- -fno-defer-pop : basically the same game as for m68k
1651 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1652 -- the fp (%ebp) for our register maps.
1653 = let n_regs = stolen_x86_regs dflags
1656 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1657 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1660 "-fomit-frame-pointer",
1661 -- we want -fno-builtin, because when gcc inlines
1662 -- built-in functions like memcpy() it tends to
1663 -- run out of registers, requiring -monly-n-regs
1665 "-DSTOLEN_X86_REGS="++show n_regs ]
1668 #elif ia64_TARGET_ARCH
1669 = ( [], ["-fomit-frame-pointer", "-G0"] )
1671 #elif x86_64_TARGET_ARCH
1672 = ( [], ["-fomit-frame-pointer",
1673 "-fno-asynchronous-unwind-tables",
1674 -- the unwind tables are unnecessary for HC code,
1675 -- and get in the way of -split-objs. Another option
1676 -- would be to throw them away in the mangler, but this
1679 -- calling builtins like strlen() using the FFI can
1680 -- cause gcc to run out of regs, so use the external
1684 #elif sparc_TARGET_ARCH
1686 -- For now, to suppress the gcc warning "call-clobbered
1687 -- register used for global register variable", we simply
1688 -- disable all warnings altogether using the -w flag. Oh well.
1690 #elif powerpc_apple_darwin_TARGET
1692 -- Disable Apple's precompiling preprocessor. It's a great thing
1693 -- for "normal" programs, but it doesn't support register variable
1695 = ( [], ["-no-cpp-precomp"] )
1700 picCCOpts :: DynFlags -> [String]
1702 #if darwin_TARGET_OS
1703 -- Apple prefers to do things the other way round.
1704 -- PIC is on by default.
1705 -- -mdynamic-no-pic:
1706 -- Turn off PIC code generation.
1708 -- Don't generate "common" symbols - these are unwanted
1709 -- in dynamic libraries.
1712 = ["-fno-common", "-D__PIC__"]
1714 = ["-mdynamic-no-pic"]
1715 #elif mingw32_TARGET_OS
1716 -- no -fPIC for Windows
1723 = ["-fPIC", "-D__PIC__"]
1728 -- -----------------------------------------------------------------------------
1732 can_split = cSplitObjs == "YES"
1734 -- -----------------------------------------------------------------------------
1737 compilerInfo :: [(String, String)]
1738 compilerInfo = [("Project name", cProjectName),
1739 ("Project version", cProjectVersion),
1740 ("Booter version", cBooterVersion),
1742 ("Interface file version", cHscIfaceFileVersion),
1743 ("Have interpreter", cGhcWithInterpreter),
1744 ("Object splitting", cSplitObjs),
1745 ("Have native code generator", cGhcWithNativeCodeGen),
1746 ("Support SMP", cGhcWithSMP),
1747 ("Unregisterised", cGhcUnregisterised),
1748 ("Tables next to code", cGhcEnableTablesNextToCode),
1749 ("Win32 DLLs", cEnableWin32DLLs),
1750 ("RTS ways", cGhcRTSWays),
1751 ("Leading underscore", cLeadingUnderscore)]