2 {-# OPTIONS -fno-warn-missing-fields #-}
3 -----------------------------------------------------------------------------
7 -- Most flags are dynamic flags, which means they can change from
8 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
9 -- multi-session GHC each session can be using different dynamic
10 -- flags. Dynamic flags can also be set at the prompt in GHCi.
12 -- (c) The University of Glasgow 2005
14 -----------------------------------------------------------------------------
17 -- The above warning supression flag is a temporary kludge.
18 -- While working on this module you are encouraged to remove it and fix
19 -- any warnings in the module. See
20 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
33 -- Configuration of the core-to-core and stg-to-stg phases
37 SimplifierMode(..), FloatOutSwitches(..),
38 getCoreToDo, getStgToDo,
40 -- Manipulating DynFlags
41 defaultDynFlags, -- DynFlags
42 initDynFlags, -- DynFlags -> IO DynFlags
44 dopt, -- DynFlag -> DynFlags -> Bool
45 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
46 getOpts, -- (DynFlags -> [a]) -> IO [a]
57 machdepCCOpts, picCCOpts,
62 #include "HsVersions.h"
64 import Module ( Module, mkModuleName, mkModule, ModLocation )
66 import PrelNames ( mAIN )
67 #ifdef i386_TARGET_ARCH
68 import StaticFlags ( opt_Static )
70 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
72 import {-# SOURCE #-} Packages (PackageState)
73 import DriverPhases ( Phase(..), phaseInputExt )
76 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
77 import Panic ( panic, GhcException(..) )
78 import UniqFM ( UniqFM )
80 import Maybes ( orElse, fromJust )
81 import SrcLoc ( SrcSpan )
83 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
85 import Data.IORef ( readIORef )
86 import Control.Exception ( throwDyn )
87 import Control.Monad ( when )
88 #ifdef mingw32_TARGET_OS
89 import Data.List ( isPrefixOf )
94 import Data.Char ( isUpper )
95 import System.IO ( hPutStrLn, stderr )
97 -- -----------------------------------------------------------------------------
105 | Opt_D_dump_cmmz_pretty
109 | Opt_D_dump_asm_native
110 | Opt_D_dump_asm_liveness
111 | Opt_D_dump_asm_coalesce
112 | Opt_D_dump_asm_regalloc
113 | Opt_D_dump_asm_regalloc_stages
114 | Opt_D_dump_asm_conflicts
115 | Opt_D_dump_asm_stats
121 | Opt_D_dump_inlinings
122 | Opt_D_dump_rule_firings
123 | Opt_D_dump_occur_anal
127 | Opt_D_dump_simpl_iterations
136 | Opt_D_dump_worker_wrapper
137 | Opt_D_dump_rn_trace
138 | Opt_D_dump_rn_stats
140 | Opt_D_dump_simpl_stats
141 | Opt_D_dump_tc_trace
142 | Opt_D_dump_if_trace
148 | Opt_D_verbose_core2core
149 | Opt_D_verbose_stg2stg
151 | Opt_D_dump_hi_diffs
152 | Opt_D_dump_minimal_imports
153 | Opt_D_dump_mod_cycles
154 | Opt_D_faststring_stats
155 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
160 | Opt_WarnIsError -- -Werror; makes warnings fatal
161 | Opt_WarnDuplicateExports
163 | Opt_WarnImplicitPrelude
164 | Opt_WarnIncompletePatterns
165 | Opt_WarnIncompletePatternsRecUpd
166 | Opt_WarnMissingFields
167 | Opt_WarnMissingMethods
168 | Opt_WarnMissingSigs
169 | Opt_WarnNameShadowing
170 | Opt_WarnOverlappingPatterns
171 | Opt_WarnSimplePatterns
172 | Opt_WarnTypeDefaults
173 | Opt_WarnMonomorphism
174 | Opt_WarnUnusedBinds
175 | Opt_WarnUnusedImports
176 | Opt_WarnUnusedMatches
177 | Opt_WarnDeprecations
178 | Opt_WarnDodgyImports
183 | Opt_OverlappingInstances
184 | Opt_UndecidableInstances
185 | Opt_IncoherentInstances
186 | Opt_MonomorphismRestriction
188 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
189 | Opt_ForeignFunctionInterface
190 | Opt_UnliftedFFITypes
191 | Opt_PArr -- Syntactic support for parallel arrays
192 | Opt_Arrows -- Arrow-notation syntax
193 | Opt_TemplateHaskell
196 | Opt_ImplicitPrelude
197 | Opt_ScopedTypeVariables
201 | Opt_OverloadedStrings
202 | Opt_DisambiguateRecordFields
203 | Opt_RecordWildCards
207 | Opt_StandaloneDeriving
208 | Opt_DeriveDataTypeable
209 | Opt_TypeSynonymInstances
210 | Opt_FlexibleContexts
211 | Opt_FlexibleInstances
212 | Opt_ConstrainedClassMethods
213 | Opt_MultiParamTypeClasses
214 | Opt_FunctionalDependencies
216 | Opt_PolymorphicComponents
217 | Opt_ExistentialQuantification
221 | Opt_PatternSignatures
222 | Opt_ParallelListComp
223 | Opt_GeneralizedNewtypeDeriving
226 | Opt_PartiallyAppliedClosedTypeSynonyms
231 | Opt_PrintExplicitForalls
239 | Opt_IgnoreInterfacePragmas
240 | Opt_OmitInterfacePragmas
241 | Opt_DoLambdaEtaExpansion
243 | Opt_IgnoreBreakpoints
246 | Opt_UnboxStrictFields
250 | Opt_RegsGraph -- do graph coloring register allocation
251 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
259 | Opt_ExcessPrecision
260 | Opt_ReadUserPackageConf
264 | Opt_HideAllPackages
265 | Opt_PrintBindResult
268 | Opt_BreakOnException
270 | Opt_PrintEvldWithShow
274 | Opt_ConvertToZipCfgAndBack
285 data DynFlags = DynFlags {
288 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
289 stgToDo :: Maybe [StgToDo], -- similarly
290 hscTarget :: HscTarget,
291 hscOutName :: String, -- name of the output file
292 extCoreName :: String, -- name of the .core output file
293 verbosity :: Int, -- verbosity level
294 optLevel :: Int, -- optimisation level
295 maxSimplIterations :: Int, -- max simplifier iterations
296 ruleCheck :: Maybe String,
298 specThreshold :: Int, -- Threshold for function specialisation
300 stolen_x86_regs :: Int,
301 cmdlineHcIncludes :: [String], -- -#includes
302 importPaths :: [FilePath],
304 mainFunIs :: Maybe String,
305 ctxtStkDepth :: Int, -- Typechecker context stack depth
307 thisPackage :: PackageId,
310 wayNames :: [WayName], -- way flags from the cmd line
311 buildTag :: String, -- the global "way" (eg. "p" for prof)
312 rtsBuildTag :: String, -- the RTS "way"
315 objectDir :: Maybe String,
316 hiDir :: Maybe String,
317 stubDir :: Maybe String,
323 outputFile :: Maybe String,
324 outputHi :: Maybe String,
326 -- | This is set by DriverPipeline.runPipeline based on where
327 -- its output is going.
328 dumpPrefix :: Maybe FilePath,
330 -- | Override the dumpPrefix set by runPipeline.
331 -- Set by -ddump-file-prefix
332 dumpPrefixForce :: Maybe FilePath,
334 includePaths :: [String],
335 libraryPaths :: [String],
336 frameworkPaths :: [String], -- used on darwin only
337 cmdlineFrameworks :: [String], -- ditto
338 tmpDir :: String, -- no trailing '/'
340 ghcUsagePath :: FilePath, -- Filled in by SysTools
341 ghciUsagePath :: FilePath, -- ditto
343 hpcDir :: String, -- ^ path to store the .mix files
345 -- options for particular phases
354 opt_windres :: [String],
356 -- commands for particular phases
358 pgm_P :: (String,[Option]),
360 pgm_c :: (String,[Option]),
361 pgm_m :: (String,[Option]),
362 pgm_s :: (String,[Option]),
363 pgm_a :: (String,[Option]),
364 pgm_l :: (String,[Option]),
365 pgm_dll :: (String,[Option]),
367 pgm_sysman :: String,
368 pgm_windres :: String,
371 extraPkgConfs :: [FilePath],
372 topDir :: FilePath, -- filled in by SysTools
373 systemPackageConfig :: FilePath, -- ditto
374 -- The -package-conf flags given on the command line, in the order
377 packageFlags :: [PackageFlag],
378 -- The -package and -hide-package flags from the command-line
381 -- NB. do not modify this field, it is calculated by
382 -- Packages.initPackages and Packages.updatePackages.
383 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
384 pkgState :: PackageState,
390 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
401 -- | will this target result in an object file on the disk?
402 isObjectTarget :: HscTarget -> Bool
403 isObjectTarget HscC = True
404 isObjectTarget HscAsm = True
405 isObjectTarget _ = False
407 -- | The 'GhcMode' tells us whether we're doing multi-module
408 -- compilation (controlled via the "GHC" API) or one-shot
409 -- (single-module) compilation. This makes a difference primarily to
410 -- the "Finder": in one-shot mode we look for interface files for
411 -- imported modules, but in multi-module mode we look for source files
412 -- in order to check whether they need to be recompiled.
414 = CompManager -- ^ --make, GHCi, etc.
415 | OneShot -- ^ ghc -c Foo.hs
416 | MkDepend -- ^ ghc -M, see Finder for why we need this
419 isOneShot :: GhcMode -> Bool
420 isOneShot OneShot = True
421 isOneShot _other = False
423 -- | What kind of linking to do.
424 data GhcLink -- What to do in the link step, if there is one
425 = NoLink -- Don't link at all
426 | LinkBinary -- Link object code into a binary
427 | LinkInMemory -- Use the in-memory dynamic linker
428 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
431 isNoLink :: GhcLink -> Bool
432 isNoLink NoLink = True
433 isNoLink other = False
436 = ExposePackage String
438 | IgnorePackage String
441 defaultHscTarget = defaultObjectTarget
443 -- | the 'HscTarget' value corresponding to the default way to create
444 -- object files on the current platform.
446 | cGhcWithNativeCodeGen == "YES" = HscAsm
449 initDynFlags dflags = do
450 -- someday these will be dynamic flags
451 ways <- readIORef v_Ways
452 build_tag <- readIORef v_Build_tag
453 rts_build_tag <- readIORef v_RTS_Build_tag
456 buildTag = build_tag,
457 rtsBuildTag = rts_build_tag
462 ghcMode = CompManager,
463 ghcLink = LinkBinary,
466 hscTarget = defaultHscTarget,
471 maxSimplIterations = 4,
475 cmdlineHcIncludes = [],
479 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
481 thisPackage = mainPackageId,
487 objectSuf = phaseInputExt StopLn,
488 hcSuf = phaseInputExt HCc,
491 outputFile = Nothing,
493 dumpPrefix = Nothing,
494 dumpPrefixForce = Nothing,
498 cmdlineFrameworks = [],
499 tmpDir = cDEFAULT_TMPDIR,
517 pkgDatabase = Nothing,
518 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
520 Opt_ReadUserPackageConf,
522 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
523 -- behaviour the default, to see if anyone notices
527 Opt_MonomorphismRestriction,
535 Opt_PrintBindResult ]
536 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
537 -- The default -O0 options
540 log_action = \severity srcSpan style msg ->
542 SevInfo -> hPutStrLn stderr (show (msg style))
543 SevFatal -> hPutStrLn stderr (show (msg style))
544 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
550 0 | print errors & warnings only
551 1 | minimal verbosity: print "compiling M ... done." for each module.
552 2 | equivalent to -dshow-passes
553 3 | equivalent to existing "ghc -v"
554 4 | "ghc -v -ddump-most"
555 5 | "ghc -v -ddump-all"
558 dopt :: DynFlag -> DynFlags -> Bool
559 dopt f dflags = f `elem` (flags dflags)
561 dopt_set :: DynFlags -> DynFlag -> DynFlags
562 dopt_set dfs f = dfs{ flags = f : flags dfs }
564 dopt_unset :: DynFlags -> DynFlag -> DynFlags
565 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
567 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
568 getOpts dflags opts = reverse (opts dflags)
569 -- We add to the options from the front, so we need to reverse the list
571 getVerbFlag :: DynFlags -> String
573 | verbosity dflags >= 3 = "-v"
576 setObjectDir f d = d{ objectDir = f}
577 setHiDir f d = d{ hiDir = f}
578 setStubDir f d = d{ stubDir = f}
580 setObjectSuf f d = d{ objectSuf = f}
581 setHiSuf f d = d{ hiSuf = f}
582 setHcSuf f d = d{ hcSuf = f}
584 setOutputFile f d = d{ outputFile = f}
585 setOutputHi f d = d{ outputHi = f}
587 setDumpPrefixForce f d = d { dumpPrefixForce = f}
589 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
590 -- Config.hs should really use Option.
591 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
593 setPgmL f d = d{ pgm_L = f}
594 setPgmF f d = d{ pgm_F = f}
595 setPgmc f d = d{ pgm_c = (f,[])}
596 setPgmm f d = d{ pgm_m = (f,[])}
597 setPgms f d = d{ pgm_s = (f,[])}
598 setPgma f d = d{ pgm_a = (f,[])}
599 setPgml f d = d{ pgm_l = (f,[])}
600 setPgmdll f d = d{ pgm_dll = (f,[])}
601 setPgmwindres f d = d{ pgm_windres = f}
603 addOptL f d = d{ opt_L = f : opt_L d}
604 addOptP f d = d{ opt_P = f : opt_P d}
605 addOptF f d = d{ opt_F = f : opt_F d}
606 addOptc f d = d{ opt_c = f : opt_c d}
607 addOptm f d = d{ opt_m = f : opt_m d}
608 addOpta f d = d{ opt_a = f : opt_a d}
609 addOptl f d = d{ opt_l = f : opt_l d}
610 addOptdep f d = d{ opt_dep = f : opt_dep d}
611 addOptwindres f d = d{ opt_windres = f : opt_windres d}
613 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
615 -- -----------------------------------------------------------------------------
616 -- Command-line options
618 -- When invoking external tools as part of the compilation pipeline, we
619 -- pass these a sequence of options on the command-line. Rather than
620 -- just using a list of Strings, we use a type that allows us to distinguish
621 -- between filepaths and 'other stuff'. [The reason being, of course, that
622 -- this type gives us a handle on transforming filenames, and filenames only,
623 -- to whatever format they're expected to be on a particular platform.]
626 = FileOption -- an entry that _contains_ filename(s) / filepaths.
627 String -- a non-filepath prefix that shouldn't be
628 -- transformed (e.g., "/out=")
629 String -- the filepath/filename portion
632 -----------------------------------------------------------------------------
633 -- Setting the optimisation level
635 updOptLevel :: Int -> DynFlags -> DynFlags
636 -- Set dynflags appropriate to the optimisation level
638 = dfs2{ optLevel = final_n }
640 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
641 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
642 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
644 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
645 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
647 optLevelFlags :: [([Int], DynFlag)]
649 = [ ([0], Opt_IgnoreInterfacePragmas)
650 , ([0], Opt_OmitInterfacePragmas)
652 , ([1,2], Opt_IgnoreAsserts)
653 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
655 , ([1,2], Opt_DoEtaReduction)
656 , ([1,2], Opt_CaseMerge)
657 , ([1,2], Opt_Strictness)
659 , ([1,2], Opt_FullLaziness)
661 , ([2], Opt_LiberateCase)
662 , ([2], Opt_SpecConstr)
664 , ([0,1,2], Opt_DoLambdaEtaExpansion)
665 -- This one is important for a tiresome reason:
666 -- we want to make sure that the bindings for data
667 -- constructors are eta-expanded. This is probably
668 -- a good thing anyway, but it seems fragile.
671 -- -----------------------------------------------------------------------------
672 -- Standard sets of warning options
675 = [ Opt_WarnDeprecations,
676 Opt_WarnOverlappingPatterns,
677 Opt_WarnMissingFields,
678 Opt_WarnMissingMethods,
679 Opt_WarnDuplicateExports
683 = standardWarnings ++
684 [ Opt_WarnUnusedBinds,
685 Opt_WarnUnusedMatches,
686 Opt_WarnUnusedImports,
687 Opt_WarnIncompletePatterns,
693 [ Opt_WarnTypeDefaults,
694 Opt_WarnNameShadowing,
700 -- minuswRemovesOpts should be every warning option
703 [Opt_WarnImplicitPrelude,
704 Opt_WarnIncompletePatternsRecUpd,
705 Opt_WarnSimplePatterns,
706 Opt_WarnMonomorphism,
710 -- -----------------------------------------------------------------------------
711 -- CoreToDo: abstraction of core-to-core passes to run.
713 data CoreToDo -- These are diff core-to-core passes,
714 -- which may be invoked in any order,
715 -- as many times as you like.
717 = CoreDoSimplify -- The core-to-core simplifier.
720 -- Each run of the simplifier can take a different
721 -- set of simplifier-specific flags.
723 | CoreDoFloatOutwards FloatOutSwitches
728 | CoreDoWorkerWrapper
731 | CoreDoOldStrictness
734 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
735 -- matching this string
736 | CoreDoVectorisation
737 | CoreDoNothing -- Useful when building up
738 | CoreDoPasses [CoreToDo] -- lists of these things
740 data SimplifierMode -- See comments in SimplMonad
744 data SimplifierSwitch
745 = MaxSimplifierIterations Int
748 data FloatOutSwitches
749 = FloatOutSw Bool -- True <=> float lambdas to top level
750 Bool -- True <=> float constants to top level,
751 -- even if they do not escape a lambda
754 -- The core-to-core pass ordering is derived from the DynFlags:
755 runWhen :: Bool -> CoreToDo -> CoreToDo
756 runWhen True do_this = do_this
757 runWhen False do_this = CoreDoNothing
759 getCoreToDo :: DynFlags -> [CoreToDo]
761 | Just todo <- coreToDo dflags = todo -- set explicitly by user
762 | otherwise = core_todo
764 opt_level = optLevel dflags
765 max_iter = maxSimplIterations dflags
766 strictness = dopt Opt_Strictness dflags
767 full_laziness = dopt Opt_FullLaziness dflags
768 cse = dopt Opt_CSE dflags
769 spec_constr = dopt Opt_SpecConstr dflags
770 liberate_case = dopt Opt_LiberateCase dflags
771 rule_check = ruleCheck dflags
772 vectorisation = dopt Opt_Vectorise dflags
775 if opt_level == 0 then
777 CoreDoSimplify (SimplPhase 0) [
778 MaxSimplifierIterations max_iter
781 else {- opt_level >= 1 -} [
783 -- initial simplify: mk specialiser happy: minimum effort please
784 CoreDoSimplify SimplGently [
786 -- Don't inline anything till full laziness has bitten
787 -- In particular, inlining wrappers inhibits floating
788 -- e.g. ...(case f x of ...)...
789 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
790 -- ==> ...(case x of I# x# -> case fw x# of ...)...
791 -- and now the redex (f x) isn't floatable any more
792 -- Similarly, don't apply any rules until after full
793 -- laziness. Notably, list fusion can prevent floating.
795 NoCaseOfCase, -- Don't do case-of-case transformations.
796 -- This makes full laziness work better
797 MaxSimplifierIterations max_iter
801 -- We run vectorisation here for now, but we might also try to run
803 runWhen vectorisation (CoreDoPasses [
805 CoreDoSimplify SimplGently
807 MaxSimplifierIterations max_iter]]),
809 -- Specialisation is best done before full laziness
810 -- so that overloaded functions have all their dictionary lambdas manifest
813 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
817 CoreDoSimplify (SimplPhase 2) [
818 -- Want to run with inline phase 2 after the specialiser to give
819 -- maximum chance for fusion to work before we inline build/augment
820 -- in phase 1. This made a difference in 'ansi' where an
821 -- overloaded function wasn't inlined till too late.
822 MaxSimplifierIterations max_iter
824 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
826 CoreDoSimplify (SimplPhase 1) [
827 -- Need inline-phase2 here so that build/augment get
828 -- inlined. I found that spectral/hartel/genfft lost some useful
829 -- strictness in the function sumcode' if augment is not inlined
830 -- before strictness analysis runs
831 MaxSimplifierIterations max_iter
833 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
835 CoreDoSimplify (SimplPhase 0) [
836 -- Phase 0: allow all Ids to be inlined now
837 -- This gets foldr inlined before strictness analysis
839 MaxSimplifierIterations 3
840 -- At least 3 iterations because otherwise we land up with
841 -- huge dead expressions because of an infelicity in the
843 -- let k = BIG in foldr k z xs
844 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
845 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
849 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
851 #ifdef OLD_STRICTNESS
854 runWhen strictness (CoreDoPasses [
858 CoreDoSimplify (SimplPhase 0) [
859 MaxSimplifierIterations max_iter
862 runWhen full_laziness
863 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
864 True)), -- Float constants
865 -- nofib/spectral/hartel/wang doubles in speed if you
866 -- do full laziness late in the day. It only happens
867 -- after fusion and other stuff, so the early pass doesn't
868 -- catch it. For the record, the redex is
869 -- f_el22 (f_el21 r_midblock)
873 -- We want CSE to follow the final full-laziness pass, because it may
874 -- succeed in commoning up things floated out by full laziness.
875 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
879 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
881 -- Case-liberation for -O2. This should be after
882 -- strictness analysis and the simplification which follows it.
883 runWhen liberate_case (CoreDoPasses [
885 CoreDoSimplify (SimplPhase 0) [
886 MaxSimplifierIterations max_iter
887 ] ]), -- Run the simplifier after LiberateCase to vastly
888 -- reduce the possiblility of shadowing
889 -- Reason: see Note [Shadowing] in SpecConstr.lhs
891 runWhen spec_constr CoreDoSpecConstr,
893 -- Final clean-up simplification:
894 CoreDoSimplify (SimplPhase 0) [
895 MaxSimplifierIterations max_iter
899 -- -----------------------------------------------------------------------------
900 -- StgToDo: abstraction of stg-to-stg passes to run.
903 = StgDoMassageForProfiling -- should be (next to) last
904 -- There's also setStgVarInfo, but its absolute "lastness"
905 -- is so critical that it is hardwired in (no flag).
908 getStgToDo :: DynFlags -> [StgToDo]
910 | Just todo <- stgToDo dflags = todo -- set explicitly by user
913 stg_stats = dopt Opt_StgStats dflags
915 todo1 = if stg_stats then [D_stg_stats] else []
917 todo2 | WayProf `elem` wayNames dflags
918 = StgDoMassageForProfiling : todo1
922 -- -----------------------------------------------------------------------------
926 allFlags = map ('-':) $
927 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
928 map ("fno-"++) flags ++
930 where ok (PrefixPred _ _) = False
932 flags = map fst fFlags
934 dynamic_flags :: [(String, OptKind DynP)]
936 ( "n" , NoArg (setDynFlag Opt_DryRun) )
937 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
938 , ( "F" , NoArg (setDynFlag Opt_Pp))
939 , ( "#include" , HasArg (addCmdlineHCInclude) )
940 , ( "v" , OptIntSuffix setVerbosity )
942 ------- Specific phases --------------------------------------------
943 , ( "pgmL" , HasArg (upd . setPgmL) )
944 , ( "pgmP" , HasArg (upd . setPgmP) )
945 , ( "pgmF" , HasArg (upd . setPgmF) )
946 , ( "pgmc" , HasArg (upd . setPgmc) )
947 , ( "pgmm" , HasArg (upd . setPgmm) )
948 , ( "pgms" , HasArg (upd . setPgms) )
949 , ( "pgma" , HasArg (upd . setPgma) )
950 , ( "pgml" , HasArg (upd . setPgml) )
951 , ( "pgmdll" , HasArg (upd . setPgmdll) )
952 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
954 , ( "optL" , HasArg (upd . addOptL) )
955 , ( "optP" , HasArg (upd . addOptP) )
956 , ( "optF" , HasArg (upd . addOptF) )
957 , ( "optc" , HasArg (upd . addOptc) )
958 , ( "optm" , HasArg (upd . addOptm) )
959 , ( "opta" , HasArg (upd . addOpta) )
960 , ( "optl" , HasArg (upd . addOptl) )
961 , ( "optdep" , HasArg (upd . addOptdep) )
962 , ( "optwindres" , HasArg (upd . addOptwindres) )
964 , ( "split-objs" , NoArg (if can_split
965 then setDynFlag Opt_SplitObjs
968 -------- Linking ----------------------------------------------------
969 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
970 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
971 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
973 ------- Libraries ---------------------------------------------------
974 , ( "L" , Prefix addLibraryPath )
975 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
977 ------- Frameworks --------------------------------------------------
978 -- -framework-path should really be -F ...
979 , ( "framework-path" , HasArg addFrameworkPath )
980 , ( "framework" , HasArg (upd . addCmdlineFramework) )
982 ------- Output Redirection ------------------------------------------
983 , ( "odir" , HasArg (upd . setObjectDir . Just))
984 , ( "o" , SepArg (upd . setOutputFile . Just))
985 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
986 , ( "osuf" , HasArg (upd . setObjectSuf))
987 , ( "hcsuf" , HasArg (upd . setHcSuf))
988 , ( "hisuf" , HasArg (upd . setHiSuf))
989 , ( "hidir" , HasArg (upd . setHiDir . Just))
990 , ( "tmpdir" , HasArg (upd . setTmpDir))
991 , ( "stubdir" , HasArg (upd . setStubDir . Just))
992 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
994 ------- Keeping temporary files -------------------------------------
995 -- These can be singular (think ghc -c) or plural (think ghc --make)
996 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
997 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
998 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
999 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
1000 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1001 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1002 -- This only makes sense as plural
1003 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1005 ------- Miscellaneous ----------------------------------------------
1006 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1007 , ( "main-is" , SepArg setMainIs )
1008 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1009 , ( "hpcdir" , SepArg setOptHpcDir )
1011 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1012 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1013 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1015 ------- Packages ----------------------------------------------------
1016 , ( "package-conf" , HasArg extraPkgConf_ )
1017 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1018 , ( "package-name" , HasArg (upd . setPackageName) )
1019 , ( "package" , HasArg exposePackage )
1020 , ( "hide-package" , HasArg hidePackage )
1021 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1022 , ( "ignore-package" , HasArg ignorePackage )
1023 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1025 ------ HsCpp opts ---------------------------------------------------
1026 , ( "D", AnySuffix (upd . addOptP) )
1027 , ( "U", AnySuffix (upd . addOptP) )
1029 ------- Include/Import Paths ----------------------------------------
1030 , ( "I" , Prefix addIncludePath)
1031 , ( "i" , OptPrefix addImportPath )
1033 ------ Debugging ----------------------------------------------------
1034 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1036 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1037 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1038 , ( "ddump-cmmz-pretty", setDumpFlag Opt_D_dump_cmmz_pretty)
1039 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1040 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1041 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1042 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1043 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1044 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1045 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1046 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1047 , ( "ddump-asm-regalloc-stages",
1048 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1049 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1050 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1051 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1052 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1053 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1054 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1055 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1056 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1057 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1058 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1059 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1060 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1061 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1062 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1063 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1064 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1065 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1066 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1067 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1068 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1069 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1070 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1071 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1072 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1073 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1074 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1075 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1076 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1077 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1078 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1079 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1080 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1081 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1082 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1083 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1084 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1085 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1086 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1087 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1088 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1089 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1090 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1091 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1092 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1093 setVerbosity (Just 2)) )
1094 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1096 ------ Machine dependant (-m<blah>) stuff ---------------------------
1098 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1099 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1100 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1102 ------ Warning opts -------------------------------------------------
1103 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1104 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1105 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1106 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1107 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1108 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1110 ------ Optimisation flags ------------------------------------------
1111 , ( "O" , NoArg (upd (setOptLevel 1)))
1112 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1113 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1114 -- If the number is missing, use 1
1116 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1117 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1119 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1120 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1121 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1123 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1124 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1126 ------ Compiler flags -----------------------------------------------
1128 , ( "fasm", NoArg (setObjTarget HscAsm) )
1129 , ( "fvia-c", NoArg (setObjTarget HscC) )
1130 , ( "fvia-C", NoArg (setObjTarget HscC) )
1132 , ( "fno-code", NoArg (setTarget HscNothing))
1133 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1134 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1136 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1137 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1139 -- the rest of the -f* and -fno-* flags
1140 , ( "f", PrefixPred (isFlag fFlags)
1141 (\f -> setDynFlag (getFlag fFlags f)) )
1142 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1143 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1145 -- the -X* and -XNo* flags
1146 , ( "X", PrefixPred (isFlag xFlags)
1147 (\f -> setDynFlag (getFlag xFlags f)) )
1148 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1149 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1152 -- these -f<blah> flags can all be reversed with -fno-<blah>
1155 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1156 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1157 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1158 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1159 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1160 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1161 ( "warn-missing-fields", Opt_WarnMissingFields ),
1162 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1163 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1164 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1165 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1166 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1167 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1168 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1169 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1170 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1171 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1172 ( "warn-deprecations", Opt_WarnDeprecations ),
1173 ( "warn-orphans", Opt_WarnOrphans ),
1174 ( "warn-tabs", Opt_WarnTabs ),
1175 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1176 ( "strictness", Opt_Strictness ),
1177 ( "full-laziness", Opt_FullLaziness ),
1178 ( "liberate-case", Opt_LiberateCase ),
1179 ( "spec-constr", Opt_SpecConstr ),
1181 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1182 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1183 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1184 ( "ignore-asserts", Opt_IgnoreAsserts ),
1185 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1186 ( "do-eta-reduction", Opt_DoEtaReduction ),
1187 ( "case-merge", Opt_CaseMerge ),
1188 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1189 ( "dicts-cheap", Opt_DictsCheap ),
1190 ( "excess-precision", Opt_ExcessPrecision ),
1191 ( "asm-mangling", Opt_DoAsmMangling ),
1192 ( "print-bind-result", Opt_PrintBindResult ),
1193 ( "force-recomp", Opt_ForceRecomp ),
1194 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1195 ( "rewrite-rules", Opt_RewriteRules ),
1196 ( "break-on-exception", Opt_BreakOnException ),
1197 ( "break-on-error", Opt_BreakOnError ),
1198 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1199 ( "run-cps", Opt_RunCPSZ ),
1200 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1201 ( "vectorise", Opt_Vectorise ),
1202 ( "regs-graph", Opt_RegsGraph),
1203 ( "regs-iterative", Opt_RegsIterative),
1204 -- Deprecated in favour of -XTemplateHaskell:
1205 ( "th", Opt_TemplateHaskell ),
1206 -- Deprecated in favour of -XForeignFunctionInterface:
1207 ( "fi", Opt_ForeignFunctionInterface ),
1208 -- Deprecated in favour of -XForeignFunctionInterface:
1209 ( "ffi", Opt_ForeignFunctionInterface ),
1210 -- Deprecated in favour of -XArrows:
1211 ( "arrows", Opt_Arrows ),
1212 -- Deprecated in favour of -XGenerics:
1213 ( "generics", Opt_Generics ),
1214 -- Deprecated in favour of -XImplicitPrelude:
1215 ( "implicit-prelude", Opt_ImplicitPrelude ),
1216 -- Deprecated in favour of -XBangPatterns:
1217 ( "bang-patterns", Opt_BangPatterns ),
1218 -- Deprecated in favour of -XMonomorphismRestriction:
1219 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1220 -- Deprecated in favour of -XMonoPatBinds:
1221 ( "mono-pat-binds", Opt_MonoPatBinds ),
1222 -- Deprecated in favour of -XExtendedDefaultRules:
1223 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1224 -- Deprecated in favour of -XImplicitParams:
1225 ( "implicit-params", Opt_ImplicitParams ),
1226 -- Deprecated in favour of -XScopedTypeVariables:
1227 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1228 -- Deprecated in favour of -XPArr:
1229 ( "parr", Opt_PArr ),
1230 -- Deprecated in favour of -XOverlappingInstances:
1231 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1232 -- Deprecated in favour of -XUndecidableInstances:
1233 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1234 -- Deprecated in favour of -XIncoherentInstances:
1235 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1236 ( "gen-manifest", Opt_GenManifest ),
1237 ( "embed-manifest", Opt_EmbedManifest )
1240 supportedLanguages :: [String]
1241 supportedLanguages = map fst xFlags
1243 -- These -X<blah> flags can all be reversed with -XNo<blah>
1244 xFlags :: [(String, DynFlag)]
1247 ( "PatternGuards", Opt_PatternGuards ),
1248 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1249 ( "MagicHash", Opt_MagicHash ),
1250 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1251 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1252 ( "KindSignatures", Opt_KindSignatures ),
1253 ( "PatternSignatures", Opt_PatternSignatures ),
1254 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1255 ( "ParallelListComp", Opt_ParallelListComp ),
1256 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1257 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1258 ( "PartiallyAppliedClosedTypeSynonyms",
1259 Opt_PartiallyAppliedClosedTypeSynonyms ),
1260 ( "Rank2Types", Opt_Rank2Types ),
1261 ( "RankNTypes", Opt_RankNTypes ),
1262 ( "TypeOperators", Opt_TypeOperators ),
1263 ( "RecursiveDo", Opt_RecursiveDo ),
1264 ( "Arrows", Opt_Arrows ),
1265 ( "PArr", Opt_PArr ),
1266 ( "TemplateHaskell", Opt_TemplateHaskell ),
1267 ( "Generics", Opt_Generics ),
1269 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1270 ( "RecordWildCards", Opt_RecordWildCards ),
1271 ( "RecordPuns", Opt_RecordPuns ),
1272 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1273 ( "OverloadedStrings", Opt_OverloadedStrings ),
1274 ( "GADTs", Opt_GADTs ),
1275 ( "TypeFamilies", Opt_TypeFamilies ),
1276 ( "BangPatterns", Opt_BangPatterns ),
1278 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1279 -- On by default (which is not strictly H98):
1280 ( "MonoPatBinds", Opt_MonoPatBinds ),
1281 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1282 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1283 ( "ImplicitParams", Opt_ImplicitParams ),
1284 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1285 ( "UnboxedTuples", Opt_UnboxedTuples ),
1286 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1287 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1288 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1289 ( "FlexibleContexts", Opt_FlexibleContexts ),
1290 ( "FlexibleInstances", Opt_FlexibleInstances ),
1291 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1292 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1293 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1294 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1295 ( "OverlappingInstances", Opt_OverlappingInstances ),
1296 ( "UndecidableInstances", Opt_UndecidableInstances ),
1297 ( "IncoherentInstances", Opt_IncoherentInstances )
1300 impliedFlags :: [(DynFlag, [DynFlag])]
1302 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1305 glasgowExtsFlags = [
1306 Opt_PrintExplicitForalls
1307 , Opt_ForeignFunctionInterface
1308 , Opt_UnliftedFFITypes
1310 , Opt_ImplicitParams
1311 , Opt_ScopedTypeVariables
1313 , Opt_TypeSynonymInstances
1314 , Opt_StandaloneDeriving
1315 , Opt_DeriveDataTypeable
1316 , Opt_FlexibleContexts
1317 , Opt_FlexibleInstances
1318 , Opt_ConstrainedClassMethods
1319 , Opt_MultiParamTypeClasses
1320 , Opt_FunctionalDependencies
1322 , Opt_PolymorphicComponents
1323 , Opt_ExistentialQuantification
1326 , Opt_PartiallyAppliedClosedTypeSynonyms
1330 , Opt_ParallelListComp
1331 , Opt_EmptyDataDecls
1332 , Opt_KindSignatures
1333 , Opt_PatternSignatures
1334 , Opt_GeneralizedNewtypeDeriving
1335 , Opt_TypeFamilies ]
1338 isFlag :: [(String,a)] -> String -> Bool
1339 isFlag flags f = any (\(ff,_) -> ff == f) flags
1341 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1342 isPrefFlag pref flags no_f
1343 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1347 getFlag :: [(String,a)] -> String -> a
1348 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1350 [] -> panic ("get_flag " ++ f)
1352 getPrefFlag :: String -> [(String,a)] -> String -> a
1353 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1354 -- We should only be passed flags which match the prefix
1356 -- -----------------------------------------------------------------------------
1357 -- Parsing the dynamic flags.
1359 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1360 parseDynamicFlags dflags args = do
1361 let ((leftover,errs),dflags')
1362 = runCmdLine (processArgs dynamic_flags args) dflags
1363 when (not (null errs)) $ do
1364 throwDyn (UsageError (unlines errs))
1365 return (dflags', leftover)
1368 type DynP = CmdLineP DynFlags
1370 upd :: (DynFlags -> DynFlags) -> DynP ()
1372 dfs <- getCmdLineState
1373 putCmdLineState $! (f dfs)
1375 --------------------------
1376 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1377 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1379 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1380 -- When you set f, set the ones it implies
1381 -- When you un-set f, however, we don't un-set the things it implies
1382 -- (except for -fno-glasgow-exts, which is treated specially)
1384 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1386 --------------------------
1387 setDumpFlag :: DynFlag -> OptKind DynP
1388 setDumpFlag dump_flag
1389 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1390 -- Whenver we -ddump, switch off the recompilation checker,
1391 -- else you don't see the dump!
1393 setVerbosity :: Maybe Int -> DynP ()
1394 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1396 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1398 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1401 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1403 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1405 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1408 | Nothing <- unpackPackageId pid
1409 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1411 = \s -> s{ thisPackage = pid }
1413 pid = stringToPackageId p
1415 -- If we're linking a binary, then only targets that produce object
1416 -- code are allowed (requests for other target types are ignored).
1417 setTarget l = upd set
1420 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1423 -- Changes the target only if we're compiling object code. This is
1424 -- used by -fasm and -fvia-C, which switch from one to the other, but
1425 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1426 -- can be safely used in an OPTIONS_GHC pragma.
1427 setObjTarget l = upd set
1430 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1433 setOptLevel :: Int -> DynFlags -> DynFlags
1434 setOptLevel n dflags
1435 | hscTarget dflags == HscInterpreted && n > 0
1437 -- not in IO any more, oh well:
1438 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1440 = updOptLevel n dflags
1443 setMainIs :: String -> DynP ()
1445 | not (null main_fn) -- The arg looked like "Foo.baz"
1446 = upd $ \d -> d{ mainFunIs = Just main_fn,
1447 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1449 | isUpper (head main_mod) -- The arg looked like "Foo"
1450 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1452 | otherwise -- The arg looked like "baz"
1453 = upd $ \d -> d{ mainFunIs = Just main_mod }
1455 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1457 -----------------------------------------------------------------------------
1458 -- Paths & Libraries
1460 -- -i on its own deletes the import paths
1461 addImportPath "" = upd (\s -> s{importPaths = []})
1462 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1466 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1469 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1471 addFrameworkPath p =
1472 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1474 split_marker = ':' -- not configurable (ToDo)
1476 splitPathList :: String -> [String]
1477 splitPathList s = filter notNull (splitUp s)
1478 -- empty paths are ignored: there might be a trailing
1479 -- ':' in the initial list, for example. Empty paths can
1480 -- cause confusion when they are translated into -I options
1481 -- for passing to gcc.
1483 #ifndef mingw32_TARGET_OS
1484 splitUp xs = split split_marker xs
1486 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1488 -- That is, if "foo:bar:baz" is used, this interpreted as
1489 -- consisting of three entries, 'foo', 'bar', 'baz'.
1490 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1491 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1493 -- Notice that no attempt is made to fully replace the 'standard'
1494 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1495 -- that this will cause too much breakage for users & ':' will
1496 -- work fine even with DOS paths, if you're not insisting on being silly.
1499 splitUp (x:':':div:xs) | div `elem` dir_markers
1500 = ((x:':':div:p): splitUp rs)
1502 (p,rs) = findNextPath xs
1503 -- we used to check for existence of the path here, but that
1504 -- required the IO monad to be threaded through the command-line
1505 -- parser which is quite inconvenient. The
1506 splitUp xs = cons p (splitUp rs)
1508 (p,rs) = findNextPath xs
1513 -- will be called either when we've consumed nought or the
1514 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1515 -- finding the next split marker.
1517 case break (`elem` split_markers) xs of
1518 (p, d:ds) -> (p, ds)
1521 split_markers :: [Char]
1522 split_markers = [':', ';']
1524 dir_markers :: [Char]
1525 dir_markers = ['/', '\\']
1528 -- -----------------------------------------------------------------------------
1529 -- tmpDir, where we store temporary files.
1531 setTmpDir :: FilePath -> DynFlags -> DynFlags
1532 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1534 #if !defined(mingw32_HOST_OS)
1535 canonicalise p = normalisePath p
1537 -- Canonicalisation of temp path under win32 is a bit more
1538 -- involved: (a) strip trailing slash,
1539 -- (b) normalise slashes
1540 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1542 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1544 -- if we're operating under cygwin, and TMP/TEMP is of
1545 -- the form "/cygdrive/drive/path", translate this to
1546 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1547 -- understand /cygdrive paths.)
1549 | "/cygdrive/" `isPrefixOf` path =
1550 case drop (length "/cygdrive/") path of
1551 drive:xs@('/':_) -> drive:':':xs
1555 -- strip the trailing backslash (awful, but we only do this once).
1556 removeTrailingSlash path =
1563 -----------------------------------------------------------------------------
1566 setOptHpcDir :: String -> DynP ()
1567 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1569 -----------------------------------------------------------------------------
1570 -- Via-C compilation stuff
1572 -- There are some options that we need to pass to gcc when compiling
1573 -- Haskell code via C, but are only supported by recent versions of
1574 -- gcc. The configure script decides which of these options we need,
1575 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1576 -- read before each via-C compilation. The advantage of having these
1577 -- in a separate file is that the file can be created at install-time
1578 -- depending on the available gcc version, and even re-generated later
1579 -- if gcc is upgraded.
1581 -- The options below are not dependent on the version of gcc, only the
1584 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1585 [String]) -- for registerised HC compilations
1586 machdepCCOpts dflags
1587 #if alpha_TARGET_ARCH
1589 #ifdef HAVE_THREADED_RTS_SUPPORT
1593 -- For now, to suppress the gcc warning "call-clobbered
1594 -- register used for global register variable", we simply
1595 -- disable all warnings altogether using the -w flag. Oh well.
1597 #elif hppa_TARGET_ARCH
1598 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1599 -- (very nice, but too bad the HP /usr/include files don't agree.)
1600 = ( ["-D_HPUX_SOURCE"], [] )
1602 #elif m68k_TARGET_ARCH
1603 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1604 -- popping of args to routines to be explicit; if we let things
1605 -- be deferred 'til after an STGJUMP, imminent death is certain!
1607 -- -fomit-frame-pointer : *don't*
1608 -- It's better to have a6 completely tied up being a frame pointer
1609 -- rather than let GCC pick random things to do with it.
1610 -- (If we want to steal a6, then we would try to do things
1611 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1612 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1614 #elif i386_TARGET_ARCH
1615 -- -fno-defer-pop : basically the same game as for m68k
1617 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1618 -- the fp (%ebp) for our register maps.
1619 = let n_regs = stolen_x86_regs dflags
1622 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1623 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1626 "-fomit-frame-pointer",
1627 -- we want -fno-builtin, because when gcc inlines
1628 -- built-in functions like memcpy() it tends to
1629 -- run out of registers, requiring -monly-n-regs
1631 "-DSTOLEN_X86_REGS="++show n_regs ]
1634 #elif ia64_TARGET_ARCH
1635 = ( [], ["-fomit-frame-pointer", "-G0"] )
1637 #elif x86_64_TARGET_ARCH
1638 = ( [], ["-fomit-frame-pointer",
1639 "-fno-asynchronous-unwind-tables",
1640 -- the unwind tables are unnecessary for HC code,
1641 -- and get in the way of -split-objs. Another option
1642 -- would be to throw them away in the mangler, but this
1645 -- calling builtins like strlen() using the FFI can
1646 -- cause gcc to run out of regs, so use the external
1650 #elif sparc_TARGET_ARCH
1652 -- For now, to suppress the gcc warning "call-clobbered
1653 -- register used for global register variable", we simply
1654 -- disable all warnings altogether using the -w flag. Oh well.
1656 #elif powerpc_apple_darwin_TARGET
1658 -- Disable Apple's precompiling preprocessor. It's a great thing
1659 -- for "normal" programs, but it doesn't support register variable
1661 = ( [], ["-no-cpp-precomp"] )
1666 picCCOpts :: DynFlags -> [String]
1668 #if darwin_TARGET_OS
1669 -- Apple prefers to do things the other way round.
1670 -- PIC is on by default.
1671 -- -mdynamic-no-pic:
1672 -- Turn off PIC code generation.
1674 -- Don't generate "common" symbols - these are unwanted
1675 -- in dynamic libraries.
1678 = ["-fno-common", "-D__PIC__"]
1680 = ["-mdynamic-no-pic"]
1681 #elif mingw32_TARGET_OS
1682 -- no -fPIC for Windows
1689 = ["-fPIC", "-D__PIC__"]
1694 -- -----------------------------------------------------------------------------
1698 can_split = cSplitObjs == "YES"
1700 -- -----------------------------------------------------------------------------
1703 compilerInfo :: [(String, String)]
1704 compilerInfo = [("Project name", cProjectName),
1705 ("Project version", cProjectVersion),
1706 ("Booter version", cBooterVersion),
1708 ("Interface file version", cHscIfaceFileVersion),
1709 ("Have interpreter", cGhcWithInterpreter),
1710 ("Object splitting", cSplitObjs),
1711 ("Have native code generator", cGhcWithNativeCodeGen),
1712 ("Support SMP", cGhcWithSMP),
1713 ("Unregisterised", cGhcUnregisterised),
1714 ("Tables next to code", cGhcEnableTablesNextToCode),
1715 ("Win32 DLLs", cEnableWin32DLLs),
1716 ("RTS ways", cGhcRTSWays),
1717 ("Leading underscore", cLeadingUnderscore)]