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 -- -----------------------------------------------------------------------------
108 | Opt_D_dump_asm_native
109 | Opt_D_dump_asm_liveness
110 | Opt_D_dump_asm_coalesce
111 | Opt_D_dump_asm_regalloc
112 | Opt_D_dump_asm_regalloc_stages
113 | Opt_D_dump_asm_conflicts
114 | Opt_D_dump_asm_stats
120 | Opt_D_dump_inlinings
121 | Opt_D_dump_rule_firings
122 | Opt_D_dump_occur_anal
126 | Opt_D_dump_simpl_iterations
135 | Opt_D_dump_worker_wrapper
136 | Opt_D_dump_rn_trace
137 | Opt_D_dump_rn_stats
139 | Opt_D_dump_simpl_stats
140 | Opt_D_dump_tc_trace
141 | Opt_D_dump_if_trace
147 | Opt_D_verbose_core2core
148 | Opt_D_verbose_stg2stg
150 | Opt_D_dump_hi_diffs
151 | Opt_D_dump_minimal_imports
152 | Opt_D_dump_mod_cycles
153 | Opt_D_faststring_stats
154 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
159 | Opt_WarnIsError -- -Werror; makes warnings fatal
160 | Opt_WarnDuplicateExports
162 | Opt_WarnImplicitPrelude
163 | Opt_WarnIncompletePatterns
164 | Opt_WarnIncompletePatternsRecUpd
165 | Opt_WarnMissingFields
166 | Opt_WarnMissingMethods
167 | Opt_WarnMissingSigs
168 | Opt_WarnNameShadowing
169 | Opt_WarnOverlappingPatterns
170 | Opt_WarnSimplePatterns
171 | Opt_WarnTypeDefaults
172 | Opt_WarnMonomorphism
173 | Opt_WarnUnusedBinds
174 | Opt_WarnUnusedImports
175 | Opt_WarnUnusedMatches
176 | Opt_WarnDeprecations
177 | Opt_WarnDodgyImports
182 | Opt_OverlappingInstances
183 | Opt_UndecidableInstances
184 | Opt_IncoherentInstances
185 | Opt_MonomorphismRestriction
187 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
188 | Opt_ForeignFunctionInterface
189 | Opt_UnliftedFFITypes
190 | Opt_PArr -- Syntactic support for parallel arrays
191 | Opt_Arrows -- Arrow-notation syntax
192 | Opt_TemplateHaskell
195 | Opt_ImplicitPrelude
196 | Opt_ScopedTypeVariables
200 | Opt_OverloadedStrings
201 | Opt_DisambiguateRecordFields
202 | Opt_RecordWildCards
206 | Opt_StandaloneDeriving
207 | Opt_DeriveDataTypeable
208 | Opt_TypeSynonymInstances
209 | Opt_FlexibleContexts
210 | Opt_FlexibleInstances
211 | Opt_ConstrainedClassMethods
212 | Opt_MultiParamTypeClasses
213 | Opt_FunctionalDependencies
215 | Opt_PolymorphicComponents
216 | Opt_ExistentialQuantification
220 | Opt_PatternSignatures
221 | Opt_ParallelListComp
222 | Opt_GeneralizedNewtypeDeriving
225 | Opt_PartiallyAppliedClosedTypeSynonyms
230 | Opt_PrintExplicitForalls
238 | Opt_IgnoreInterfacePragmas
239 | Opt_OmitInterfacePragmas
240 | Opt_DoLambdaEtaExpansion
242 | Opt_IgnoreBreakpoints
245 | Opt_UnboxStrictFields
257 | Opt_ExcessPrecision
258 | Opt_ReadUserPackageConf
262 | Opt_HideAllPackages
263 | Opt_PrintBindResult
266 | Opt_BreakOnException
271 | Opt_ConvertToZipCfgAndBack
282 data DynFlags = DynFlags {
285 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
286 stgToDo :: Maybe [StgToDo], -- similarly
287 hscTarget :: HscTarget,
288 hscOutName :: String, -- name of the output file
289 extCoreName :: String, -- name of the .core output file
290 verbosity :: Int, -- verbosity level
291 optLevel :: Int, -- optimisation level
292 maxSimplIterations :: Int, -- max simplifier iterations
293 ruleCheck :: Maybe String,
295 specThreshold :: Int, -- Threshold for function specialisation
297 stolen_x86_regs :: Int,
298 cmdlineHcIncludes :: [String], -- -#includes
299 importPaths :: [FilePath],
301 mainFunIs :: Maybe String,
302 ctxtStkDepth :: Int, -- Typechecker context stack depth
304 thisPackage :: PackageId,
307 wayNames :: [WayName], -- way flags from the cmd line
308 buildTag :: String, -- the global "way" (eg. "p" for prof)
309 rtsBuildTag :: String, -- the RTS "way"
312 objectDir :: Maybe String,
313 hiDir :: Maybe String,
314 stubDir :: Maybe String,
320 outputFile :: Maybe String,
321 outputHi :: Maybe String,
323 -- | This is set by DriverPipeline.runPipeline based on where
324 -- its output is going.
325 dumpPrefix :: Maybe FilePath,
327 -- | Override the dumpPrefix set by runPipeline.
328 -- Set by -ddump-file-prefix
329 dumpPrefixForce :: Maybe FilePath,
331 includePaths :: [String],
332 libraryPaths :: [String],
333 frameworkPaths :: [String], -- used on darwin only
334 cmdlineFrameworks :: [String], -- ditto
335 tmpDir :: String, -- no trailing '/'
337 ghcUsagePath :: FilePath, -- Filled in by SysTools
338 ghciUsagePath :: FilePath, -- ditto
340 hpcDir :: String, -- ^ path to store the .mix files
342 -- options for particular phases
351 opt_windres :: [String],
353 -- commands for particular phases
355 pgm_P :: (String,[Option]),
357 pgm_c :: (String,[Option]),
358 pgm_m :: (String,[Option]),
359 pgm_s :: (String,[Option]),
360 pgm_a :: (String,[Option]),
361 pgm_l :: (String,[Option]),
362 pgm_dll :: (String,[Option]),
364 pgm_sysman :: String,
365 pgm_windres :: String,
368 extraPkgConfs :: [FilePath],
369 topDir :: FilePath, -- filled in by SysTools
370 systemPackageConfig :: FilePath, -- ditto
371 -- The -package-conf flags given on the command line, in the order
374 packageFlags :: [PackageFlag],
375 -- The -package and -hide-package flags from the command-line
378 -- NB. do not modify this field, it is calculated by
379 -- Packages.initPackages and Packages.updatePackages.
380 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
381 pkgState :: PackageState,
387 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
398 -- | will this target result in an object file on the disk?
399 isObjectTarget :: HscTarget -> Bool
400 isObjectTarget HscC = True
401 isObjectTarget HscAsm = True
402 isObjectTarget _ = False
404 -- | The 'GhcMode' tells us whether we're doing multi-module
405 -- compilation (controlled via the "GHC" API) or one-shot
406 -- (single-module) compilation. This makes a difference primarily to
407 -- the "Finder": in one-shot mode we look for interface files for
408 -- imported modules, but in multi-module mode we look for source files
409 -- in order to check whether they need to be recompiled.
411 = CompManager -- ^ --make, GHCi, etc.
412 | OneShot -- ^ ghc -c Foo.hs
413 | MkDepend -- ^ ghc -M, see Finder for why we need this
416 isOneShot :: GhcMode -> Bool
417 isOneShot OneShot = True
418 isOneShot _other = False
420 -- | What kind of linking to do.
421 data GhcLink -- What to do in the link step, if there is one
422 = NoLink -- Don't link at all
423 | LinkBinary -- Link object code into a binary
424 | LinkInMemory -- Use the in-memory dynamic linker
425 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
428 isNoLink :: GhcLink -> Bool
429 isNoLink NoLink = True
430 isNoLink other = False
433 = ExposePackage String
435 | IgnorePackage String
438 defaultHscTarget = defaultObjectTarget
440 -- | the 'HscTarget' value corresponding to the default way to create
441 -- object files on the current platform.
443 | cGhcWithNativeCodeGen == "YES" = HscAsm
446 initDynFlags dflags = do
447 -- someday these will be dynamic flags
448 ways <- readIORef v_Ways
449 build_tag <- readIORef v_Build_tag
450 rts_build_tag <- readIORef v_RTS_Build_tag
453 buildTag = build_tag,
454 rtsBuildTag = rts_build_tag
459 ghcMode = CompManager,
460 ghcLink = LinkBinary,
463 hscTarget = defaultHscTarget,
468 maxSimplIterations = 4,
472 cmdlineHcIncludes = [],
476 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
478 thisPackage = mainPackageId,
484 objectSuf = phaseInputExt StopLn,
485 hcSuf = phaseInputExt HCc,
488 outputFile = Nothing,
490 dumpPrefix = Nothing,
491 dumpPrefixForce = Nothing,
495 cmdlineFrameworks = [],
496 tmpDir = cDEFAULT_TMPDIR,
514 pkgDatabase = Nothing,
515 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
517 Opt_ReadUserPackageConf,
519 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
520 -- behaviour the default, to see if anyone notices
524 Opt_MonomorphismRestriction,
532 Opt_PrintBindResult ]
533 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
534 -- The default -O0 options
537 log_action = \severity srcSpan style msg ->
539 SevInfo -> hPutStrLn stderr (show (msg style))
540 SevFatal -> hPutStrLn stderr (show (msg style))
541 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
547 0 | print errors & warnings only
548 1 | minimal verbosity: print "compiling M ... done." for each module.
549 2 | equivalent to -dshow-passes
550 3 | equivalent to existing "ghc -v"
551 4 | "ghc -v -ddump-most"
552 5 | "ghc -v -ddump-all"
555 dopt :: DynFlag -> DynFlags -> Bool
556 dopt f dflags = f `elem` (flags dflags)
558 dopt_set :: DynFlags -> DynFlag -> DynFlags
559 dopt_set dfs f = dfs{ flags = f : flags dfs }
561 dopt_unset :: DynFlags -> DynFlag -> DynFlags
562 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
564 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
565 getOpts dflags opts = reverse (opts dflags)
566 -- We add to the options from the front, so we need to reverse the list
568 getVerbFlag :: DynFlags -> String
570 | verbosity dflags >= 3 = "-v"
573 setObjectDir f d = d{ objectDir = f}
574 setHiDir f d = d{ hiDir = f}
575 setStubDir f d = d{ stubDir = f}
577 setObjectSuf f d = d{ objectSuf = f}
578 setHiSuf f d = d{ hiSuf = f}
579 setHcSuf f d = d{ hcSuf = f}
581 setOutputFile f d = d{ outputFile = f}
582 setOutputHi f d = d{ outputHi = f}
584 setDumpPrefixForce f d = d { dumpPrefixForce = f}
586 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
587 -- Config.hs should really use Option.
588 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
590 setPgmL f d = d{ pgm_L = f}
591 setPgmF f d = d{ pgm_F = f}
592 setPgmc f d = d{ pgm_c = (f,[])}
593 setPgmm f d = d{ pgm_m = (f,[])}
594 setPgms f d = d{ pgm_s = (f,[])}
595 setPgma f d = d{ pgm_a = (f,[])}
596 setPgml f d = d{ pgm_l = (f,[])}
597 setPgmdll f d = d{ pgm_dll = (f,[])}
598 setPgmwindres f d = d{ pgm_windres = f}
600 addOptL f d = d{ opt_L = f : opt_L d}
601 addOptP f d = d{ opt_P = f : opt_P d}
602 addOptF f d = d{ opt_F = f : opt_F d}
603 addOptc f d = d{ opt_c = f : opt_c d}
604 addOptm f d = d{ opt_m = f : opt_m d}
605 addOpta f d = d{ opt_a = f : opt_a d}
606 addOptl f d = d{ opt_l = f : opt_l d}
607 addOptdep f d = d{ opt_dep = f : opt_dep d}
608 addOptwindres f d = d{ opt_windres = f : opt_windres d}
610 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
612 -- -----------------------------------------------------------------------------
613 -- Command-line options
615 -- When invoking external tools as part of the compilation pipeline, we
616 -- pass these a sequence of options on the command-line. Rather than
617 -- just using a list of Strings, we use a type that allows us to distinguish
618 -- between filepaths and 'other stuff'. [The reason being, of course, that
619 -- this type gives us a handle on transforming filenames, and filenames only,
620 -- to whatever format they're expected to be on a particular platform.]
623 = FileOption -- an entry that _contains_ filename(s) / filepaths.
624 String -- a non-filepath prefix that shouldn't be
625 -- transformed (e.g., "/out=")
626 String -- the filepath/filename portion
629 -----------------------------------------------------------------------------
630 -- Setting the optimisation level
632 updOptLevel :: Int -> DynFlags -> DynFlags
633 -- Set dynflags appropriate to the optimisation level
635 = dfs2{ optLevel = final_n }
637 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
638 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
639 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
641 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
642 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
644 optLevelFlags :: [([Int], DynFlag)]
646 = [ ([0], Opt_IgnoreInterfacePragmas)
647 , ([0], Opt_OmitInterfacePragmas)
649 , ([1,2], Opt_IgnoreAsserts)
650 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
652 , ([1,2], Opt_DoEtaReduction)
653 , ([1,2], Opt_CaseMerge)
654 , ([1,2], Opt_Strictness)
656 , ([1,2], Opt_FullLaziness)
658 , ([2], Opt_LiberateCase)
659 , ([2], Opt_SpecConstr)
661 , ([0,1,2], Opt_DoLambdaEtaExpansion)
662 -- This one is important for a tiresome reason:
663 -- we want to make sure that the bindings for data
664 -- constructors are eta-expanded. This is probably
665 -- a good thing anyway, but it seems fragile.
668 -- -----------------------------------------------------------------------------
669 -- Standard sets of warning options
672 = [ Opt_WarnDeprecations,
673 Opt_WarnOverlappingPatterns,
674 Opt_WarnMissingFields,
675 Opt_WarnMissingMethods,
676 Opt_WarnDuplicateExports
680 = standardWarnings ++
681 [ Opt_WarnUnusedBinds,
682 Opt_WarnUnusedMatches,
683 Opt_WarnUnusedImports,
684 Opt_WarnIncompletePatterns,
690 [ Opt_WarnTypeDefaults,
691 Opt_WarnNameShadowing,
697 -- minuswRemovesOpts should be every warning option
700 [Opt_WarnImplicitPrelude,
701 Opt_WarnIncompletePatternsRecUpd,
702 Opt_WarnSimplePatterns,
703 Opt_WarnMonomorphism,
707 -- -----------------------------------------------------------------------------
708 -- CoreToDo: abstraction of core-to-core passes to run.
710 data CoreToDo -- These are diff core-to-core passes,
711 -- which may be invoked in any order,
712 -- as many times as you like.
714 = CoreDoSimplify -- The core-to-core simplifier.
717 -- Each run of the simplifier can take a different
718 -- set of simplifier-specific flags.
720 | CoreDoFloatOutwards FloatOutSwitches
725 | CoreDoWorkerWrapper
728 | CoreDoOldStrictness
731 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
732 -- matching this string
733 | CoreDoVectorisation
734 | CoreDoNothing -- Useful when building up
735 | CoreDoPasses [CoreToDo] -- lists of these things
737 data SimplifierMode -- See comments in SimplMonad
741 data SimplifierSwitch
742 = MaxSimplifierIterations Int
745 data FloatOutSwitches
746 = FloatOutSw Bool -- True <=> float lambdas to top level
747 Bool -- True <=> float constants to top level,
748 -- even if they do not escape a lambda
751 -- The core-to-core pass ordering is derived from the DynFlags:
752 runWhen :: Bool -> CoreToDo -> CoreToDo
753 runWhen True do_this = do_this
754 runWhen False do_this = CoreDoNothing
756 getCoreToDo :: DynFlags -> [CoreToDo]
758 | Just todo <- coreToDo dflags = todo -- set explicitly by user
759 | otherwise = core_todo
761 opt_level = optLevel dflags
762 max_iter = maxSimplIterations dflags
763 strictness = dopt Opt_Strictness dflags
764 full_laziness = dopt Opt_FullLaziness dflags
765 cse = dopt Opt_CSE dflags
766 spec_constr = dopt Opt_SpecConstr dflags
767 liberate_case = dopt Opt_LiberateCase dflags
768 rule_check = ruleCheck dflags
769 vectorisation = dopt Opt_Vectorise dflags
772 if opt_level == 0 then
774 CoreDoSimplify (SimplPhase 0) [
775 MaxSimplifierIterations max_iter
778 else {- opt_level >= 1 -} [
780 -- initial simplify: mk specialiser happy: minimum effort please
781 CoreDoSimplify SimplGently [
783 -- Don't inline anything till full laziness has bitten
784 -- In particular, inlining wrappers inhibits floating
785 -- e.g. ...(case f x of ...)...
786 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
787 -- ==> ...(case x of I# x# -> case fw x# of ...)...
788 -- and now the redex (f x) isn't floatable any more
789 -- Similarly, don't apply any rules until after full
790 -- laziness. Notably, list fusion can prevent floating.
792 NoCaseOfCase, -- Don't do case-of-case transformations.
793 -- This makes full laziness work better
794 MaxSimplifierIterations max_iter
798 -- We run vectorisation here for now, but we might also try to run
800 runWhen vectorisation (CoreDoPasses [
802 CoreDoSimplify SimplGently
804 MaxSimplifierIterations max_iter]]),
806 -- Specialisation is best done before full laziness
807 -- so that overloaded functions have all their dictionary lambdas manifest
810 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
814 CoreDoSimplify (SimplPhase 2) [
815 -- Want to run with inline phase 2 after the specialiser to give
816 -- maximum chance for fusion to work before we inline build/augment
817 -- in phase 1. This made a difference in 'ansi' where an
818 -- overloaded function wasn't inlined till too late.
819 MaxSimplifierIterations max_iter
821 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
823 CoreDoSimplify (SimplPhase 1) [
824 -- Need inline-phase2 here so that build/augment get
825 -- inlined. I found that spectral/hartel/genfft lost some useful
826 -- strictness in the function sumcode' if augment is not inlined
827 -- before strictness analysis runs
828 MaxSimplifierIterations max_iter
830 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
832 CoreDoSimplify (SimplPhase 0) [
833 -- Phase 0: allow all Ids to be inlined now
834 -- This gets foldr inlined before strictness analysis
836 MaxSimplifierIterations 3
837 -- At least 3 iterations because otherwise we land up with
838 -- huge dead expressions because of an infelicity in the
840 -- let k = BIG in foldr k z xs
841 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
842 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
846 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
848 #ifdef OLD_STRICTNESS
851 runWhen strictness (CoreDoPasses [
855 CoreDoSimplify (SimplPhase 0) [
856 MaxSimplifierIterations max_iter
859 runWhen full_laziness
860 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
861 True)), -- Float constants
862 -- nofib/spectral/hartel/wang doubles in speed if you
863 -- do full laziness late in the day. It only happens
864 -- after fusion and other stuff, so the early pass doesn't
865 -- catch it. For the record, the redex is
866 -- f_el22 (f_el21 r_midblock)
870 -- We want CSE to follow the final full-laziness pass, because it may
871 -- succeed in commoning up things floated out by full laziness.
872 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
876 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
878 -- Case-liberation for -O2. This should be after
879 -- strictness analysis and the simplification which follows it.
880 runWhen liberate_case (CoreDoPasses [
882 CoreDoSimplify (SimplPhase 0) [
883 MaxSimplifierIterations max_iter
884 ] ]), -- Run the simplifier after LiberateCase to vastly
885 -- reduce the possiblility of shadowing
886 -- Reason: see Note [Shadowing] in SpecConstr.lhs
888 runWhen spec_constr CoreDoSpecConstr,
890 -- Final clean-up simplification:
891 CoreDoSimplify (SimplPhase 0) [
892 MaxSimplifierIterations max_iter
896 -- -----------------------------------------------------------------------------
897 -- StgToDo: abstraction of stg-to-stg passes to run.
900 = StgDoMassageForProfiling -- should be (next to) last
901 -- There's also setStgVarInfo, but its absolute "lastness"
902 -- is so critical that it is hardwired in (no flag).
905 getStgToDo :: DynFlags -> [StgToDo]
907 | Just todo <- stgToDo dflags = todo -- set explicitly by user
910 stg_stats = dopt Opt_StgStats dflags
912 todo1 = if stg_stats then [D_stg_stats] else []
914 todo2 | WayProf `elem` wayNames dflags
915 = StgDoMassageForProfiling : todo1
919 -- -----------------------------------------------------------------------------
923 allFlags = map ('-':) $
924 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
925 map ("fno-"++) flags ++
927 where ok (PrefixPred _ _) = False
929 flags = map fst fFlags
931 dynamic_flags :: [(String, OptKind DynP)]
933 ( "n" , NoArg (setDynFlag Opt_DryRun) )
934 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
935 , ( "F" , NoArg (setDynFlag Opt_Pp))
936 , ( "#include" , HasArg (addCmdlineHCInclude) )
937 , ( "v" , OptIntSuffix setVerbosity )
939 ------- Specific phases --------------------------------------------
940 , ( "pgmL" , HasArg (upd . setPgmL) )
941 , ( "pgmP" , HasArg (upd . setPgmP) )
942 , ( "pgmF" , HasArg (upd . setPgmF) )
943 , ( "pgmc" , HasArg (upd . setPgmc) )
944 , ( "pgmm" , HasArg (upd . setPgmm) )
945 , ( "pgms" , HasArg (upd . setPgms) )
946 , ( "pgma" , HasArg (upd . setPgma) )
947 , ( "pgml" , HasArg (upd . setPgml) )
948 , ( "pgmdll" , HasArg (upd . setPgmdll) )
949 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
951 , ( "optL" , HasArg (upd . addOptL) )
952 , ( "optP" , HasArg (upd . addOptP) )
953 , ( "optF" , HasArg (upd . addOptF) )
954 , ( "optc" , HasArg (upd . addOptc) )
955 , ( "optm" , HasArg (upd . addOptm) )
956 , ( "opta" , HasArg (upd . addOpta) )
957 , ( "optl" , HasArg (upd . addOptl) )
958 , ( "optdep" , HasArg (upd . addOptdep) )
959 , ( "optwindres" , HasArg (upd . addOptwindres) )
961 , ( "split-objs" , NoArg (if can_split
962 then setDynFlag Opt_SplitObjs
965 -------- Linking ----------------------------------------------------
966 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
967 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
968 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
970 ------- Libraries ---------------------------------------------------
971 , ( "L" , Prefix addLibraryPath )
972 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
974 ------- Frameworks --------------------------------------------------
975 -- -framework-path should really be -F ...
976 , ( "framework-path" , HasArg addFrameworkPath )
977 , ( "framework" , HasArg (upd . addCmdlineFramework) )
979 ------- Output Redirection ------------------------------------------
980 , ( "odir" , HasArg (upd . setObjectDir . Just))
981 , ( "o" , SepArg (upd . setOutputFile . Just))
982 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
983 , ( "osuf" , HasArg (upd . setObjectSuf))
984 , ( "hcsuf" , HasArg (upd . setHcSuf))
985 , ( "hisuf" , HasArg (upd . setHiSuf))
986 , ( "hidir" , HasArg (upd . setHiDir . Just))
987 , ( "tmpdir" , HasArg (upd . setTmpDir))
988 , ( "stubdir" , HasArg (upd . setStubDir . Just))
989 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
991 ------- Keeping temporary files -------------------------------------
992 -- These can be singular (think ghc -c) or plural (think ghc --make)
993 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
994 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
995 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
996 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
997 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
998 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
999 -- This only makes sense as plural
1000 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1002 ------- Miscellaneous ----------------------------------------------
1003 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1004 , ( "main-is" , SepArg setMainIs )
1005 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1006 , ( "hpcdir" , SepArg setOptHpcDir )
1008 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1009 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1010 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1012 ------- Packages ----------------------------------------------------
1013 , ( "package-conf" , HasArg extraPkgConf_ )
1014 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1015 , ( "package-name" , HasArg (upd . setPackageName) )
1016 , ( "package" , HasArg exposePackage )
1017 , ( "hide-package" , HasArg hidePackage )
1018 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1019 , ( "ignore-package" , HasArg ignorePackage )
1020 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1022 ------ HsCpp opts ---------------------------------------------------
1023 , ( "D", AnySuffix (upd . addOptP) )
1024 , ( "U", AnySuffix (upd . addOptP) )
1026 ------- Include/Import Paths ----------------------------------------
1027 , ( "I" , Prefix addIncludePath)
1028 , ( "i" , OptPrefix addImportPath )
1030 ------ Debugging ----------------------------------------------------
1031 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1033 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1034 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1035 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1036 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1037 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1038 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1039 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1040 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1041 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1042 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1043 , ( "ddump-asm-regalloc-stages",
1044 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1045 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1046 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1047 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1048 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1049 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1050 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1051 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1052 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1053 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1054 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1055 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1056 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1057 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1058 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1059 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1060 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1061 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1062 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1063 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1064 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1065 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1066 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1067 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1068 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1069 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1070 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1071 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1072 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1073 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1074 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1075 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1076 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1077 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1078 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1079 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1080 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1081 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1082 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1083 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1084 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1085 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1086 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1087 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1088 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1089 setVerbosity (Just 2)) )
1090 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1092 ------ Machine dependant (-m<blah>) stuff ---------------------------
1094 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1095 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1096 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1098 ------ Warning opts -------------------------------------------------
1099 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1100 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1101 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1102 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1103 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1104 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1106 ------ Optimisation flags ------------------------------------------
1107 , ( "O" , NoArg (upd (setOptLevel 1)))
1108 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1109 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1110 -- If the number is missing, use 1
1112 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1113 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1115 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1116 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1117 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1119 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1120 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1122 ------ Compiler flags -----------------------------------------------
1124 , ( "fasm", NoArg (setObjTarget HscAsm) )
1125 , ( "fvia-c", NoArg (setObjTarget HscC) )
1126 , ( "fvia-C", NoArg (setObjTarget HscC) )
1128 , ( "fno-code", NoArg (setTarget HscNothing))
1129 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1130 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1132 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1133 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1135 -- the rest of the -f* and -fno-* flags
1136 , ( "f", PrefixPred (isFlag fFlags)
1137 (\f -> setDynFlag (getFlag fFlags f)) )
1138 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1139 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1141 -- the -X* and -XNo* flags
1142 , ( "X", PrefixPred (isFlag xFlags)
1143 (\f -> setDynFlag (getFlag xFlags f)) )
1144 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1145 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1148 -- these -f<blah> flags can all be reversed with -fno-<blah>
1151 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1152 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1153 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1154 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1155 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1156 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1157 ( "warn-missing-fields", Opt_WarnMissingFields ),
1158 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1159 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1160 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1161 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1162 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1163 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1164 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1165 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1166 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1167 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1168 ( "warn-deprecations", Opt_WarnDeprecations ),
1169 ( "warn-orphans", Opt_WarnOrphans ),
1170 ( "warn-tabs", Opt_WarnTabs ),
1171 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1172 ( "strictness", Opt_Strictness ),
1173 ( "full-laziness", Opt_FullLaziness ),
1174 ( "liberate-case", Opt_LiberateCase ),
1175 ( "spec-constr", Opt_SpecConstr ),
1177 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1178 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1179 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1180 ( "ignore-asserts", Opt_IgnoreAsserts ),
1181 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1182 ( "do-eta-reduction", Opt_DoEtaReduction ),
1183 ( "case-merge", Opt_CaseMerge ),
1184 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1185 ( "dicts-cheap", Opt_DictsCheap ),
1186 ( "excess-precision", Opt_ExcessPrecision ),
1187 ( "asm-mangling", Opt_DoAsmMangling ),
1188 ( "print-bind-result", Opt_PrintBindResult ),
1189 ( "force-recomp", Opt_ForceRecomp ),
1190 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1191 ( "rewrite-rules", Opt_RewriteRules ),
1192 ( "break-on-exception", Opt_BreakOnException ),
1193 ( "break-on-error", Opt_BreakOnError ),
1194 ( "run-cps", Opt_RunCPSZ ),
1195 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1196 ( "vectorise", Opt_Vectorise ),
1197 ( "regs-graph", Opt_RegsGraph),
1198 -- Deprecated in favour of -XTemplateHaskell:
1199 ( "th", Opt_TemplateHaskell ),
1200 -- Deprecated in favour of -XForeignFunctionInterface:
1201 ( "fi", Opt_ForeignFunctionInterface ),
1202 -- Deprecated in favour of -XForeignFunctionInterface:
1203 ( "ffi", Opt_ForeignFunctionInterface ),
1204 -- Deprecated in favour of -XArrows:
1205 ( "arrows", Opt_Arrows ),
1206 -- Deprecated in favour of -XGenerics:
1207 ( "generics", Opt_Generics ),
1208 -- Deprecated in favour of -XImplicitPrelude:
1209 ( "implicit-prelude", Opt_ImplicitPrelude ),
1210 -- Deprecated in favour of -XBangPatterns:
1211 ( "bang-patterns", Opt_BangPatterns ),
1212 -- Deprecated in favour of -XMonomorphismRestriction:
1213 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1214 -- Deprecated in favour of -XMonoPatBinds:
1215 ( "mono-pat-binds", Opt_MonoPatBinds ),
1216 -- Deprecated in favour of -XExtendedDefaultRules:
1217 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1218 -- Deprecated in favour of -XImplicitParams:
1219 ( "implicit-params", Opt_ImplicitParams ),
1220 -- Deprecated in favour of -XScopedTypeVariables:
1221 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1222 -- Deprecated in favour of -XPArr:
1223 ( "parr", Opt_PArr ),
1224 -- Deprecated in favour of -XOverlappingInstances:
1225 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1226 -- Deprecated in favour of -XUndecidableInstances:
1227 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1228 -- Deprecated in favour of -XIncoherentInstances:
1229 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1230 ( "gen-manifest", Opt_GenManifest ),
1231 ( "embed-manifest", Opt_EmbedManifest )
1234 supportedLanguages :: [String]
1235 supportedLanguages = map fst xFlags
1237 -- These -X<blah> flags can all be reversed with -XNo<blah>
1238 xFlags :: [(String, DynFlag)]
1241 ( "PatternGuards", Opt_PatternGuards ),
1242 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1243 ( "MagicHash", Opt_MagicHash ),
1244 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1245 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1246 ( "KindSignatures", Opt_KindSignatures ),
1247 ( "PatternSignatures", Opt_PatternSignatures ),
1248 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1249 ( "ParallelListComp", Opt_ParallelListComp ),
1250 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1251 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1252 ( "PartiallyAppliedClosedTypeSynonyms",
1253 Opt_PartiallyAppliedClosedTypeSynonyms ),
1254 ( "Rank2Types", Opt_Rank2Types ),
1255 ( "RankNTypes", Opt_RankNTypes ),
1256 ( "TypeOperators", Opt_TypeOperators ),
1257 ( "RecursiveDo", Opt_RecursiveDo ),
1258 ( "Arrows", Opt_Arrows ),
1259 ( "PArr", Opt_PArr ),
1260 ( "TemplateHaskell", Opt_TemplateHaskell ),
1261 ( "Generics", Opt_Generics ),
1263 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1264 ( "RecordWildCards", Opt_RecordWildCards ),
1265 ( "RecordPuns", Opt_RecordPuns ),
1266 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1267 ( "OverloadedStrings", Opt_OverloadedStrings ),
1268 ( "GADTs", Opt_GADTs ),
1269 ( "TypeFamilies", Opt_TypeFamilies ),
1270 ( "BangPatterns", Opt_BangPatterns ),
1272 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1273 -- On by default (which is not strictly H98):
1274 ( "MonoPatBinds", Opt_MonoPatBinds ),
1275 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1276 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1277 ( "ImplicitParams", Opt_ImplicitParams ),
1278 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1279 ( "UnboxedTuples", Opt_UnboxedTuples ),
1280 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1281 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1282 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1283 ( "FlexibleContexts", Opt_FlexibleContexts ),
1284 ( "FlexibleInstances", Opt_FlexibleInstances ),
1285 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1286 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1287 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1288 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1289 ( "OverlappingInstances", Opt_OverlappingInstances ),
1290 ( "UndecidableInstances", Opt_UndecidableInstances ),
1291 ( "IncoherentInstances", Opt_IncoherentInstances )
1294 impliedFlags :: [(DynFlag, [DynFlag])]
1296 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1299 glasgowExtsFlags = [
1300 Opt_PrintExplicitForalls
1301 , Opt_ForeignFunctionInterface
1302 , Opt_UnliftedFFITypes
1304 , Opt_ImplicitParams
1305 , Opt_ScopedTypeVariables
1307 , Opt_TypeSynonymInstances
1308 , Opt_StandaloneDeriving
1309 , Opt_DeriveDataTypeable
1310 , Opt_FlexibleContexts
1311 , Opt_FlexibleInstances
1312 , Opt_ConstrainedClassMethods
1313 , Opt_MultiParamTypeClasses
1314 , Opt_FunctionalDependencies
1316 , Opt_PolymorphicComponents
1317 , Opt_ExistentialQuantification
1320 , Opt_PartiallyAppliedClosedTypeSynonyms
1324 , Opt_ParallelListComp
1325 , Opt_EmptyDataDecls
1326 , Opt_KindSignatures
1327 , Opt_PatternSignatures
1328 , Opt_GeneralizedNewtypeDeriving
1329 , Opt_TypeFamilies ]
1332 isFlag :: [(String,a)] -> String -> Bool
1333 isFlag flags f = any (\(ff,_) -> ff == f) flags
1335 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1336 isPrefFlag pref flags no_f
1337 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1341 getFlag :: [(String,a)] -> String -> a
1342 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1344 [] -> panic ("get_flag " ++ f)
1346 getPrefFlag :: String -> [(String,a)] -> String -> a
1347 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1348 -- We should only be passed flags which match the prefix
1350 -- -----------------------------------------------------------------------------
1351 -- Parsing the dynamic flags.
1353 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1354 parseDynamicFlags dflags args = do
1355 let ((leftover,errs),dflags')
1356 = runCmdLine (processArgs dynamic_flags args) dflags
1357 when (not (null errs)) $ do
1358 throwDyn (UsageError (unlines errs))
1359 return (dflags', leftover)
1362 type DynP = CmdLineP DynFlags
1364 upd :: (DynFlags -> DynFlags) -> DynP ()
1366 dfs <- getCmdLineState
1367 putCmdLineState $! (f dfs)
1369 --------------------------
1370 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1371 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1373 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1374 -- When you set f, set the ones it implies
1375 -- When you un-set f, however, we don't un-set the things it implies
1376 -- (except for -fno-glasgow-exts, which is treated specially)
1378 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1380 --------------------------
1381 setDumpFlag :: DynFlag -> OptKind DynP
1382 setDumpFlag dump_flag
1383 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1384 -- Whenver we -ddump, switch off the recompilation checker,
1385 -- else you don't see the dump!
1387 setVerbosity :: Maybe Int -> DynP ()
1388 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1390 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1392 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1395 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1397 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1399 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1402 | Nothing <- unpackPackageId pid
1403 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1405 = \s -> s{ thisPackage = pid }
1407 pid = stringToPackageId p
1409 -- If we're linking a binary, then only targets that produce object
1410 -- code are allowed (requests for other target types are ignored).
1411 setTarget l = upd set
1414 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1417 -- Changes the target only if we're compiling object code. This is
1418 -- used by -fasm and -fvia-C, which switch from one to the other, but
1419 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1420 -- can be safely used in an OPTIONS_GHC pragma.
1421 setObjTarget l = upd set
1424 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1427 setOptLevel :: Int -> DynFlags -> DynFlags
1428 setOptLevel n dflags
1429 | hscTarget dflags == HscInterpreted && n > 0
1431 -- not in IO any more, oh well:
1432 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1434 = updOptLevel n dflags
1437 setMainIs :: String -> DynP ()
1439 | not (null main_fn) -- The arg looked like "Foo.baz"
1440 = upd $ \d -> d{ mainFunIs = Just main_fn,
1441 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1443 | isUpper (head main_mod) -- The arg looked like "Foo"
1444 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1446 | otherwise -- The arg looked like "baz"
1447 = upd $ \d -> d{ mainFunIs = Just main_mod }
1449 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1451 -----------------------------------------------------------------------------
1452 -- Paths & Libraries
1454 -- -i on its own deletes the import paths
1455 addImportPath "" = upd (\s -> s{importPaths = []})
1456 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1460 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1463 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1465 addFrameworkPath p =
1466 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1468 split_marker = ':' -- not configurable (ToDo)
1470 splitPathList :: String -> [String]
1471 splitPathList s = filter notNull (splitUp s)
1472 -- empty paths are ignored: there might be a trailing
1473 -- ':' in the initial list, for example. Empty paths can
1474 -- cause confusion when they are translated into -I options
1475 -- for passing to gcc.
1477 #ifndef mingw32_TARGET_OS
1478 splitUp xs = split split_marker xs
1480 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1482 -- That is, if "foo:bar:baz" is used, this interpreted as
1483 -- consisting of three entries, 'foo', 'bar', 'baz'.
1484 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1485 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1487 -- Notice that no attempt is made to fully replace the 'standard'
1488 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1489 -- that this will cause too much breakage for users & ':' will
1490 -- work fine even with DOS paths, if you're not insisting on being silly.
1493 splitUp (x:':':div:xs) | div `elem` dir_markers
1494 = ((x:':':div:p): splitUp rs)
1496 (p,rs) = findNextPath xs
1497 -- we used to check for existence of the path here, but that
1498 -- required the IO monad to be threaded through the command-line
1499 -- parser which is quite inconvenient. The
1500 splitUp xs = cons p (splitUp rs)
1502 (p,rs) = findNextPath xs
1507 -- will be called either when we've consumed nought or the
1508 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1509 -- finding the next split marker.
1511 case break (`elem` split_markers) xs of
1512 (p, d:ds) -> (p, ds)
1515 split_markers :: [Char]
1516 split_markers = [':', ';']
1518 dir_markers :: [Char]
1519 dir_markers = ['/', '\\']
1522 -- -----------------------------------------------------------------------------
1523 -- tmpDir, where we store temporary files.
1525 setTmpDir :: FilePath -> DynFlags -> DynFlags
1526 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1528 #if !defined(mingw32_HOST_OS)
1529 canonicalise p = normalisePath p
1531 -- Canonicalisation of temp path under win32 is a bit more
1532 -- involved: (a) strip trailing slash,
1533 -- (b) normalise slashes
1534 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1536 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1538 -- if we're operating under cygwin, and TMP/TEMP is of
1539 -- the form "/cygdrive/drive/path", translate this to
1540 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1541 -- understand /cygdrive paths.)
1543 | "/cygdrive/" `isPrefixOf` path =
1544 case drop (length "/cygdrive/") path of
1545 drive:xs@('/':_) -> drive:':':xs
1549 -- strip the trailing backslash (awful, but we only do this once).
1550 removeTrailingSlash path =
1557 -----------------------------------------------------------------------------
1560 setOptHpcDir :: String -> DynP ()
1561 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1563 -----------------------------------------------------------------------------
1564 -- Via-C compilation stuff
1566 -- There are some options that we need to pass to gcc when compiling
1567 -- Haskell code via C, but are only supported by recent versions of
1568 -- gcc. The configure script decides which of these options we need,
1569 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1570 -- read before each via-C compilation. The advantage of having these
1571 -- in a separate file is that the file can be created at install-time
1572 -- depending on the available gcc version, and even re-generated later
1573 -- if gcc is upgraded.
1575 -- The options below are not dependent on the version of gcc, only the
1578 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1579 [String]) -- for registerised HC compilations
1580 machdepCCOpts dflags
1581 #if alpha_TARGET_ARCH
1583 #ifdef HAVE_THREADED_RTS_SUPPORT
1587 -- For now, to suppress the gcc warning "call-clobbered
1588 -- register used for global register variable", we simply
1589 -- disable all warnings altogether using the -w flag. Oh well.
1591 #elif hppa_TARGET_ARCH
1592 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1593 -- (very nice, but too bad the HP /usr/include files don't agree.)
1594 = ( ["-D_HPUX_SOURCE"], [] )
1596 #elif m68k_TARGET_ARCH
1597 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1598 -- popping of args to routines to be explicit; if we let things
1599 -- be deferred 'til after an STGJUMP, imminent death is certain!
1601 -- -fomit-frame-pointer : *don't*
1602 -- It's better to have a6 completely tied up being a frame pointer
1603 -- rather than let GCC pick random things to do with it.
1604 -- (If we want to steal a6, then we would try to do things
1605 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1606 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1608 #elif i386_TARGET_ARCH
1609 -- -fno-defer-pop : basically the same game as for m68k
1611 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1612 -- the fp (%ebp) for our register maps.
1613 = let n_regs = stolen_x86_regs dflags
1616 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1617 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1620 "-fomit-frame-pointer",
1621 -- we want -fno-builtin, because when gcc inlines
1622 -- built-in functions like memcpy() it tends to
1623 -- run out of registers, requiring -monly-n-regs
1625 "-DSTOLEN_X86_REGS="++show n_regs ]
1628 #elif ia64_TARGET_ARCH
1629 = ( [], ["-fomit-frame-pointer", "-G0"] )
1631 #elif x86_64_TARGET_ARCH
1632 = ( [], ["-fomit-frame-pointer",
1633 "-fno-asynchronous-unwind-tables",
1634 -- the unwind tables are unnecessary for HC code,
1635 -- and get in the way of -split-objs. Another option
1636 -- would be to throw them away in the mangler, but this
1639 -- calling builtins like strlen() using the FFI can
1640 -- cause gcc to run out of regs, so use the external
1644 #elif sparc_TARGET_ARCH
1646 -- For now, to suppress the gcc warning "call-clobbered
1647 -- register used for global register variable", we simply
1648 -- disable all warnings altogether using the -w flag. Oh well.
1650 #elif powerpc_apple_darwin_TARGET
1652 -- Disable Apple's precompiling preprocessor. It's a great thing
1653 -- for "normal" programs, but it doesn't support register variable
1655 = ( [], ["-no-cpp-precomp"] )
1660 picCCOpts :: DynFlags -> [String]
1662 #if darwin_TARGET_OS
1663 -- Apple prefers to do things the other way round.
1664 -- PIC is on by default.
1665 -- -mdynamic-no-pic:
1666 -- Turn off PIC code generation.
1668 -- Don't generate "common" symbols - these are unwanted
1669 -- in dynamic libraries.
1672 = ["-fno-common", "-D__PIC__"]
1674 = ["-mdynamic-no-pic"]
1675 #elif mingw32_TARGET_OS
1676 -- no -fPIC for Windows
1683 = ["-fPIC", "-D__PIC__"]
1688 -- -----------------------------------------------------------------------------
1692 can_split = cSplitObjs == "YES"
1694 -- -----------------------------------------------------------------------------
1697 compilerInfo :: [(String, String)]
1698 compilerInfo = [("Project name", cProjectName),
1699 ("Project version", cProjectVersion),
1700 ("Booter version", cBooterVersion),
1702 ("Interface file version", cHscIfaceFileVersion),
1703 ("Have interpreter", cGhcWithInterpreter),
1704 ("Object splitting", cSplitObjs),
1705 ("Have native code generator", cGhcWithNativeCodeGen),
1706 ("Support SMP", cGhcWithSMP),
1707 ("Unregisterised", cGhcUnregisterised),
1708 ("Tables next to code", cGhcEnableTablesNextToCode),
1709 ("Win32 DLLs", cEnableWin32DLLs),
1710 ("RTS ways", cGhcRTSWays),
1711 ("Leading underscore", cLeadingUnderscore)]