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
249 | Opt_RegsGraph -- do graph coloring register allocation
250 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
258 | Opt_ExcessPrecision
259 | Opt_ReadUserPackageConf
263 | Opt_HideAllPackages
264 | Opt_PrintBindResult
267 | Opt_BreakOnException
269 | Opt_PrintEvldWithShow
273 | Opt_ConvertToZipCfgAndBack
284 data DynFlags = DynFlags {
287 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
288 stgToDo :: Maybe [StgToDo], -- similarly
289 hscTarget :: HscTarget,
290 hscOutName :: String, -- name of the output file
291 extCoreName :: String, -- name of the .core output file
292 verbosity :: Int, -- verbosity level
293 optLevel :: Int, -- optimisation level
294 maxSimplIterations :: Int, -- max simplifier iterations
295 ruleCheck :: Maybe String,
297 specThreshold :: Int, -- Threshold for function specialisation
299 stolen_x86_regs :: Int,
300 cmdlineHcIncludes :: [String], -- -#includes
301 importPaths :: [FilePath],
303 mainFunIs :: Maybe String,
304 ctxtStkDepth :: Int, -- Typechecker context stack depth
306 thisPackage :: PackageId,
309 wayNames :: [WayName], -- way flags from the cmd line
310 buildTag :: String, -- the global "way" (eg. "p" for prof)
311 rtsBuildTag :: String, -- the RTS "way"
314 objectDir :: Maybe String,
315 hiDir :: Maybe String,
316 stubDir :: Maybe String,
322 outputFile :: Maybe String,
323 outputHi :: Maybe String,
325 -- | This is set by DriverPipeline.runPipeline based on where
326 -- its output is going.
327 dumpPrefix :: Maybe FilePath,
329 -- | Override the dumpPrefix set by runPipeline.
330 -- Set by -ddump-file-prefix
331 dumpPrefixForce :: Maybe FilePath,
333 includePaths :: [String],
334 libraryPaths :: [String],
335 frameworkPaths :: [String], -- used on darwin only
336 cmdlineFrameworks :: [String], -- ditto
337 tmpDir :: String, -- no trailing '/'
339 ghcUsagePath :: FilePath, -- Filled in by SysTools
340 ghciUsagePath :: FilePath, -- ditto
342 hpcDir :: String, -- ^ path to store the .mix files
344 -- options for particular phases
353 opt_windres :: [String],
355 -- commands for particular phases
357 pgm_P :: (String,[Option]),
359 pgm_c :: (String,[Option]),
360 pgm_m :: (String,[Option]),
361 pgm_s :: (String,[Option]),
362 pgm_a :: (String,[Option]),
363 pgm_l :: (String,[Option]),
364 pgm_dll :: (String,[Option]),
366 pgm_sysman :: String,
367 pgm_windres :: String,
370 extraPkgConfs :: [FilePath],
371 topDir :: FilePath, -- filled in by SysTools
372 systemPackageConfig :: FilePath, -- ditto
373 -- The -package-conf flags given on the command line, in the order
376 packageFlags :: [PackageFlag],
377 -- The -package and -hide-package flags from the command-line
380 -- NB. do not modify this field, it is calculated by
381 -- Packages.initPackages and Packages.updatePackages.
382 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
383 pkgState :: PackageState,
389 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
400 -- | will this target result in an object file on the disk?
401 isObjectTarget :: HscTarget -> Bool
402 isObjectTarget HscC = True
403 isObjectTarget HscAsm = True
404 isObjectTarget _ = False
406 -- | The 'GhcMode' tells us whether we're doing multi-module
407 -- compilation (controlled via the "GHC" API) or one-shot
408 -- (single-module) compilation. This makes a difference primarily to
409 -- the "Finder": in one-shot mode we look for interface files for
410 -- imported modules, but in multi-module mode we look for source files
411 -- in order to check whether they need to be recompiled.
413 = CompManager -- ^ --make, GHCi, etc.
414 | OneShot -- ^ ghc -c Foo.hs
415 | MkDepend -- ^ ghc -M, see Finder for why we need this
418 isOneShot :: GhcMode -> Bool
419 isOneShot OneShot = True
420 isOneShot _other = False
422 -- | What kind of linking to do.
423 data GhcLink -- What to do in the link step, if there is one
424 = NoLink -- Don't link at all
425 | LinkBinary -- Link object code into a binary
426 | LinkInMemory -- Use the in-memory dynamic linker
427 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
430 isNoLink :: GhcLink -> Bool
431 isNoLink NoLink = True
432 isNoLink other = False
435 = ExposePackage String
437 | IgnorePackage String
440 defaultHscTarget = defaultObjectTarget
442 -- | the 'HscTarget' value corresponding to the default way to create
443 -- object files on the current platform.
445 | cGhcWithNativeCodeGen == "YES" = HscAsm
448 initDynFlags dflags = do
449 -- someday these will be dynamic flags
450 ways <- readIORef v_Ways
451 build_tag <- readIORef v_Build_tag
452 rts_build_tag <- readIORef v_RTS_Build_tag
455 buildTag = build_tag,
456 rtsBuildTag = rts_build_tag
461 ghcMode = CompManager,
462 ghcLink = LinkBinary,
465 hscTarget = defaultHscTarget,
470 maxSimplIterations = 4,
474 cmdlineHcIncludes = [],
478 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
480 thisPackage = mainPackageId,
486 objectSuf = phaseInputExt StopLn,
487 hcSuf = phaseInputExt HCc,
490 outputFile = Nothing,
492 dumpPrefix = Nothing,
493 dumpPrefixForce = Nothing,
497 cmdlineFrameworks = [],
498 tmpDir = cDEFAULT_TMPDIR,
516 pkgDatabase = Nothing,
517 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
519 Opt_ReadUserPackageConf,
521 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
522 -- behaviour the default, to see if anyone notices
526 Opt_MonomorphismRestriction,
534 Opt_PrintBindResult ]
535 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
536 -- The default -O0 options
539 log_action = \severity srcSpan style msg ->
541 SevInfo -> hPutStrLn stderr (show (msg style))
542 SevFatal -> hPutStrLn stderr (show (msg style))
543 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
549 0 | print errors & warnings only
550 1 | minimal verbosity: print "compiling M ... done." for each module.
551 2 | equivalent to -dshow-passes
552 3 | equivalent to existing "ghc -v"
553 4 | "ghc -v -ddump-most"
554 5 | "ghc -v -ddump-all"
557 dopt :: DynFlag -> DynFlags -> Bool
558 dopt f dflags = f `elem` (flags dflags)
560 dopt_set :: DynFlags -> DynFlag -> DynFlags
561 dopt_set dfs f = dfs{ flags = f : flags dfs }
563 dopt_unset :: DynFlags -> DynFlag -> DynFlags
564 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
566 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
567 getOpts dflags opts = reverse (opts dflags)
568 -- We add to the options from the front, so we need to reverse the list
570 getVerbFlag :: DynFlags -> String
572 | verbosity dflags >= 3 = "-v"
575 setObjectDir f d = d{ objectDir = f}
576 setHiDir f d = d{ hiDir = f}
577 setStubDir f d = d{ stubDir = f}
579 setObjectSuf f d = d{ objectSuf = f}
580 setHiSuf f d = d{ hiSuf = f}
581 setHcSuf f d = d{ hcSuf = f}
583 setOutputFile f d = d{ outputFile = f}
584 setOutputHi f d = d{ outputHi = f}
586 setDumpPrefixForce f d = d { dumpPrefixForce = f}
588 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
589 -- Config.hs should really use Option.
590 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
592 setPgmL f d = d{ pgm_L = f}
593 setPgmF f d = d{ pgm_F = f}
594 setPgmc f d = d{ pgm_c = (f,[])}
595 setPgmm f d = d{ pgm_m = (f,[])}
596 setPgms f d = d{ pgm_s = (f,[])}
597 setPgma f d = d{ pgm_a = (f,[])}
598 setPgml f d = d{ pgm_l = (f,[])}
599 setPgmdll f d = d{ pgm_dll = (f,[])}
600 setPgmwindres f d = d{ pgm_windres = f}
602 addOptL f d = d{ opt_L = f : opt_L d}
603 addOptP f d = d{ opt_P = f : opt_P d}
604 addOptF f d = d{ opt_F = f : opt_F d}
605 addOptc f d = d{ opt_c = f : opt_c d}
606 addOptm f d = d{ opt_m = f : opt_m d}
607 addOpta f d = d{ opt_a = f : opt_a d}
608 addOptl f d = d{ opt_l = f : opt_l d}
609 addOptdep f d = d{ opt_dep = f : opt_dep d}
610 addOptwindres f d = d{ opt_windres = f : opt_windres d}
612 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
614 -- -----------------------------------------------------------------------------
615 -- Command-line options
617 -- When invoking external tools as part of the compilation pipeline, we
618 -- pass these a sequence of options on the command-line. Rather than
619 -- just using a list of Strings, we use a type that allows us to distinguish
620 -- between filepaths and 'other stuff'. [The reason being, of course, that
621 -- this type gives us a handle on transforming filenames, and filenames only,
622 -- to whatever format they're expected to be on a particular platform.]
625 = FileOption -- an entry that _contains_ filename(s) / filepaths.
626 String -- a non-filepath prefix that shouldn't be
627 -- transformed (e.g., "/out=")
628 String -- the filepath/filename portion
631 -----------------------------------------------------------------------------
632 -- Setting the optimisation level
634 updOptLevel :: Int -> DynFlags -> DynFlags
635 -- Set dynflags appropriate to the optimisation level
637 = dfs2{ optLevel = final_n }
639 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
640 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
641 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
643 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
644 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
646 optLevelFlags :: [([Int], DynFlag)]
648 = [ ([0], Opt_IgnoreInterfacePragmas)
649 , ([0], Opt_OmitInterfacePragmas)
651 , ([1,2], Opt_IgnoreAsserts)
652 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
654 , ([1,2], Opt_DoEtaReduction)
655 , ([1,2], Opt_CaseMerge)
656 , ([1,2], Opt_Strictness)
658 , ([1,2], Opt_FullLaziness)
660 , ([2], Opt_LiberateCase)
661 , ([2], Opt_SpecConstr)
663 , ([0,1,2], Opt_DoLambdaEtaExpansion)
664 -- This one is important for a tiresome reason:
665 -- we want to make sure that the bindings for data
666 -- constructors are eta-expanded. This is probably
667 -- a good thing anyway, but it seems fragile.
670 -- -----------------------------------------------------------------------------
671 -- Standard sets of warning options
674 = [ Opt_WarnDeprecations,
675 Opt_WarnOverlappingPatterns,
676 Opt_WarnMissingFields,
677 Opt_WarnMissingMethods,
678 Opt_WarnDuplicateExports
682 = standardWarnings ++
683 [ Opt_WarnUnusedBinds,
684 Opt_WarnUnusedMatches,
685 Opt_WarnUnusedImports,
686 Opt_WarnIncompletePatterns,
692 [ Opt_WarnTypeDefaults,
693 Opt_WarnNameShadowing,
699 -- minuswRemovesOpts should be every warning option
702 [Opt_WarnImplicitPrelude,
703 Opt_WarnIncompletePatternsRecUpd,
704 Opt_WarnSimplePatterns,
705 Opt_WarnMonomorphism,
709 -- -----------------------------------------------------------------------------
710 -- CoreToDo: abstraction of core-to-core passes to run.
712 data CoreToDo -- These are diff core-to-core passes,
713 -- which may be invoked in any order,
714 -- as many times as you like.
716 = CoreDoSimplify -- The core-to-core simplifier.
719 -- Each run of the simplifier can take a different
720 -- set of simplifier-specific flags.
722 | CoreDoFloatOutwards FloatOutSwitches
727 | CoreDoWorkerWrapper
730 | CoreDoOldStrictness
733 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
734 -- matching this string
735 | CoreDoVectorisation
736 | CoreDoNothing -- Useful when building up
737 | CoreDoPasses [CoreToDo] -- lists of these things
739 data SimplifierMode -- See comments in SimplMonad
743 data SimplifierSwitch
744 = MaxSimplifierIterations Int
747 data FloatOutSwitches
748 = FloatOutSw Bool -- True <=> float lambdas to top level
749 Bool -- True <=> float constants to top level,
750 -- even if they do not escape a lambda
753 -- The core-to-core pass ordering is derived from the DynFlags:
754 runWhen :: Bool -> CoreToDo -> CoreToDo
755 runWhen True do_this = do_this
756 runWhen False do_this = CoreDoNothing
758 getCoreToDo :: DynFlags -> [CoreToDo]
760 | Just todo <- coreToDo dflags = todo -- set explicitly by user
761 | otherwise = core_todo
763 opt_level = optLevel dflags
764 max_iter = maxSimplIterations dflags
765 strictness = dopt Opt_Strictness dflags
766 full_laziness = dopt Opt_FullLaziness dflags
767 cse = dopt Opt_CSE dflags
768 spec_constr = dopt Opt_SpecConstr dflags
769 liberate_case = dopt Opt_LiberateCase dflags
770 rule_check = ruleCheck dflags
771 vectorisation = dopt Opt_Vectorise dflags
774 if opt_level == 0 then
776 CoreDoSimplify (SimplPhase 0) [
777 MaxSimplifierIterations max_iter
780 else {- opt_level >= 1 -} [
782 -- initial simplify: mk specialiser happy: minimum effort please
783 CoreDoSimplify SimplGently [
785 -- Don't inline anything till full laziness has bitten
786 -- In particular, inlining wrappers inhibits floating
787 -- e.g. ...(case f x of ...)...
788 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
789 -- ==> ...(case x of I# x# -> case fw x# of ...)...
790 -- and now the redex (f x) isn't floatable any more
791 -- Similarly, don't apply any rules until after full
792 -- laziness. Notably, list fusion can prevent floating.
794 NoCaseOfCase, -- Don't do case-of-case transformations.
795 -- This makes full laziness work better
796 MaxSimplifierIterations max_iter
800 -- We run vectorisation here for now, but we might also try to run
802 runWhen vectorisation (CoreDoPasses [
804 CoreDoSimplify SimplGently
806 MaxSimplifierIterations max_iter]]),
808 -- Specialisation is best done before full laziness
809 -- so that overloaded functions have all their dictionary lambdas manifest
812 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
816 CoreDoSimplify (SimplPhase 2) [
817 -- Want to run with inline phase 2 after the specialiser to give
818 -- maximum chance for fusion to work before we inline build/augment
819 -- in phase 1. This made a difference in 'ansi' where an
820 -- overloaded function wasn't inlined till too late.
821 MaxSimplifierIterations max_iter
823 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
825 CoreDoSimplify (SimplPhase 1) [
826 -- Need inline-phase2 here so that build/augment get
827 -- inlined. I found that spectral/hartel/genfft lost some useful
828 -- strictness in the function sumcode' if augment is not inlined
829 -- before strictness analysis runs
830 MaxSimplifierIterations max_iter
832 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
834 CoreDoSimplify (SimplPhase 0) [
835 -- Phase 0: allow all Ids to be inlined now
836 -- This gets foldr inlined before strictness analysis
838 MaxSimplifierIterations 3
839 -- At least 3 iterations because otherwise we land up with
840 -- huge dead expressions because of an infelicity in the
842 -- let k = BIG in foldr k z xs
843 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
844 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
848 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
850 #ifdef OLD_STRICTNESS
853 runWhen strictness (CoreDoPasses [
857 CoreDoSimplify (SimplPhase 0) [
858 MaxSimplifierIterations max_iter
861 runWhen full_laziness
862 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
863 True)), -- Float constants
864 -- nofib/spectral/hartel/wang doubles in speed if you
865 -- do full laziness late in the day. It only happens
866 -- after fusion and other stuff, so the early pass doesn't
867 -- catch it. For the record, the redex is
868 -- f_el22 (f_el21 r_midblock)
872 -- We want CSE to follow the final full-laziness pass, because it may
873 -- succeed in commoning up things floated out by full laziness.
874 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
878 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
880 -- Case-liberation for -O2. This should be after
881 -- strictness analysis and the simplification which follows it.
882 runWhen liberate_case (CoreDoPasses [
884 CoreDoSimplify (SimplPhase 0) [
885 MaxSimplifierIterations max_iter
886 ] ]), -- Run the simplifier after LiberateCase to vastly
887 -- reduce the possiblility of shadowing
888 -- Reason: see Note [Shadowing] in SpecConstr.lhs
890 runWhen spec_constr CoreDoSpecConstr,
892 -- Final clean-up simplification:
893 CoreDoSimplify (SimplPhase 0) [
894 MaxSimplifierIterations max_iter
898 -- -----------------------------------------------------------------------------
899 -- StgToDo: abstraction of stg-to-stg passes to run.
902 = StgDoMassageForProfiling -- should be (next to) last
903 -- There's also setStgVarInfo, but its absolute "lastness"
904 -- is so critical that it is hardwired in (no flag).
907 getStgToDo :: DynFlags -> [StgToDo]
909 | Just todo <- stgToDo dflags = todo -- set explicitly by user
912 stg_stats = dopt Opt_StgStats dflags
914 todo1 = if stg_stats then [D_stg_stats] else []
916 todo2 | WayProf `elem` wayNames dflags
917 = StgDoMassageForProfiling : todo1
921 -- -----------------------------------------------------------------------------
925 allFlags = map ('-':) $
926 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
927 map ("fno-"++) flags ++
929 where ok (PrefixPred _ _) = False
931 flags = map fst fFlags
933 dynamic_flags :: [(String, OptKind DynP)]
935 ( "n" , NoArg (setDynFlag Opt_DryRun) )
936 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
937 , ( "F" , NoArg (setDynFlag Opt_Pp))
938 , ( "#include" , HasArg (addCmdlineHCInclude) )
939 , ( "v" , OptIntSuffix setVerbosity )
941 ------- Specific phases --------------------------------------------
942 , ( "pgmL" , HasArg (upd . setPgmL) )
943 , ( "pgmP" , HasArg (upd . setPgmP) )
944 , ( "pgmF" , HasArg (upd . setPgmF) )
945 , ( "pgmc" , HasArg (upd . setPgmc) )
946 , ( "pgmm" , HasArg (upd . setPgmm) )
947 , ( "pgms" , HasArg (upd . setPgms) )
948 , ( "pgma" , HasArg (upd . setPgma) )
949 , ( "pgml" , HasArg (upd . setPgml) )
950 , ( "pgmdll" , HasArg (upd . setPgmdll) )
951 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
953 , ( "optL" , HasArg (upd . addOptL) )
954 , ( "optP" , HasArg (upd . addOptP) )
955 , ( "optF" , HasArg (upd . addOptF) )
956 , ( "optc" , HasArg (upd . addOptc) )
957 , ( "optm" , HasArg (upd . addOptm) )
958 , ( "opta" , HasArg (upd . addOpta) )
959 , ( "optl" , HasArg (upd . addOptl) )
960 , ( "optdep" , HasArg (upd . addOptdep) )
961 , ( "optwindres" , HasArg (upd . addOptwindres) )
963 , ( "split-objs" , NoArg (if can_split
964 then setDynFlag Opt_SplitObjs
967 -------- Linking ----------------------------------------------------
968 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
969 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
970 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
972 ------- Libraries ---------------------------------------------------
973 , ( "L" , Prefix addLibraryPath )
974 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
976 ------- Frameworks --------------------------------------------------
977 -- -framework-path should really be -F ...
978 , ( "framework-path" , HasArg addFrameworkPath )
979 , ( "framework" , HasArg (upd . addCmdlineFramework) )
981 ------- Output Redirection ------------------------------------------
982 , ( "odir" , HasArg (upd . setObjectDir . Just))
983 , ( "o" , SepArg (upd . setOutputFile . Just))
984 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
985 , ( "osuf" , HasArg (upd . setObjectSuf))
986 , ( "hcsuf" , HasArg (upd . setHcSuf))
987 , ( "hisuf" , HasArg (upd . setHiSuf))
988 , ( "hidir" , HasArg (upd . setHiDir . Just))
989 , ( "tmpdir" , HasArg (upd . setTmpDir))
990 , ( "stubdir" , HasArg (upd . setStubDir . Just))
991 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
993 ------- Keeping temporary files -------------------------------------
994 -- These can be singular (think ghc -c) or plural (think ghc --make)
995 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
996 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
997 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
998 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
999 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
1000 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
1001 -- This only makes sense as plural
1002 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1004 ------- Miscellaneous ----------------------------------------------
1005 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1006 , ( "main-is" , SepArg setMainIs )
1007 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1008 , ( "hpcdir" , SepArg setOptHpcDir )
1010 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1011 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1012 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1014 ------- Packages ----------------------------------------------------
1015 , ( "package-conf" , HasArg extraPkgConf_ )
1016 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1017 , ( "package-name" , HasArg (upd . setPackageName) )
1018 , ( "package" , HasArg exposePackage )
1019 , ( "hide-package" , HasArg hidePackage )
1020 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1021 , ( "ignore-package" , HasArg ignorePackage )
1022 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1024 ------ HsCpp opts ---------------------------------------------------
1025 , ( "D", AnySuffix (upd . addOptP) )
1026 , ( "U", AnySuffix (upd . addOptP) )
1028 ------- Include/Import Paths ----------------------------------------
1029 , ( "I" , Prefix addIncludePath)
1030 , ( "i" , OptPrefix addImportPath )
1032 ------ Debugging ----------------------------------------------------
1033 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1035 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1036 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1037 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1038 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1039 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1040 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1041 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1042 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1043 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1044 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1045 , ( "ddump-asm-regalloc-stages",
1046 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1047 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1048 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1049 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1050 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1051 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1052 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1053 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1054 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1055 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1056 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1057 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1058 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1059 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1060 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1061 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1062 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1063 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1064 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1065 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1066 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1067 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1068 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1069 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1070 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1071 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1072 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1073 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1074 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1075 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1076 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1077 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1078 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1079 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1080 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1081 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1082 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1083 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1084 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1085 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1086 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1087 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1088 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1089 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1090 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1091 setVerbosity (Just 2)) )
1092 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1094 ------ Machine dependant (-m<blah>) stuff ---------------------------
1096 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1097 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1098 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1100 ------ Warning opts -------------------------------------------------
1101 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1102 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1103 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1104 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1105 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1106 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1108 ------ Optimisation flags ------------------------------------------
1109 , ( "O" , NoArg (upd (setOptLevel 1)))
1110 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1111 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1112 -- If the number is missing, use 1
1114 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1115 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1117 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1118 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1119 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1121 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1122 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1124 ------ Compiler flags -----------------------------------------------
1126 , ( "fasm", NoArg (setObjTarget HscAsm) )
1127 , ( "fvia-c", NoArg (setObjTarget HscC) )
1128 , ( "fvia-C", NoArg (setObjTarget HscC) )
1130 , ( "fno-code", NoArg (setTarget HscNothing))
1131 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1132 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1134 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1135 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1137 -- the rest of the -f* and -fno-* flags
1138 , ( "f", PrefixPred (isFlag fFlags)
1139 (\f -> setDynFlag (getFlag fFlags f)) )
1140 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1141 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1143 -- the -X* and -XNo* flags
1144 , ( "X", PrefixPred (isFlag xFlags)
1145 (\f -> setDynFlag (getFlag xFlags f)) )
1146 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1147 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1150 -- these -f<blah> flags can all be reversed with -fno-<blah>
1153 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1154 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1155 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1156 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1157 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1158 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1159 ( "warn-missing-fields", Opt_WarnMissingFields ),
1160 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1161 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1162 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1163 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1164 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1165 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1166 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1167 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1168 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1169 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1170 ( "warn-deprecations", Opt_WarnDeprecations ),
1171 ( "warn-orphans", Opt_WarnOrphans ),
1172 ( "warn-tabs", Opt_WarnTabs ),
1173 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1174 ( "strictness", Opt_Strictness ),
1175 ( "full-laziness", Opt_FullLaziness ),
1176 ( "liberate-case", Opt_LiberateCase ),
1177 ( "spec-constr", Opt_SpecConstr ),
1179 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1180 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1181 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1182 ( "ignore-asserts", Opt_IgnoreAsserts ),
1183 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1184 ( "do-eta-reduction", Opt_DoEtaReduction ),
1185 ( "case-merge", Opt_CaseMerge ),
1186 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1187 ( "dicts-cheap", Opt_DictsCheap ),
1188 ( "excess-precision", Opt_ExcessPrecision ),
1189 ( "asm-mangling", Opt_DoAsmMangling ),
1190 ( "print-bind-result", Opt_PrintBindResult ),
1191 ( "force-recomp", Opt_ForceRecomp ),
1192 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1193 ( "rewrite-rules", Opt_RewriteRules ),
1194 ( "break-on-exception", Opt_BreakOnException ),
1195 ( "break-on-error", Opt_BreakOnError ),
1196 ( "print-evld-with-show", Opt_PrintEvldWithShow ),
1197 ( "run-cps", Opt_RunCPSZ ),
1198 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1199 ( "vectorise", Opt_Vectorise ),
1200 ( "regs-graph", Opt_RegsGraph),
1201 ( "regs-iterative", Opt_RegsIterative),
1202 -- Deprecated in favour of -XTemplateHaskell:
1203 ( "th", Opt_TemplateHaskell ),
1204 -- Deprecated in favour of -XForeignFunctionInterface:
1205 ( "fi", Opt_ForeignFunctionInterface ),
1206 -- Deprecated in favour of -XForeignFunctionInterface:
1207 ( "ffi", Opt_ForeignFunctionInterface ),
1208 -- Deprecated in favour of -XArrows:
1209 ( "arrows", Opt_Arrows ),
1210 -- Deprecated in favour of -XGenerics:
1211 ( "generics", Opt_Generics ),
1212 -- Deprecated in favour of -XImplicitPrelude:
1213 ( "implicit-prelude", Opt_ImplicitPrelude ),
1214 -- Deprecated in favour of -XBangPatterns:
1215 ( "bang-patterns", Opt_BangPatterns ),
1216 -- Deprecated in favour of -XMonomorphismRestriction:
1217 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1218 -- Deprecated in favour of -XMonoPatBinds:
1219 ( "mono-pat-binds", Opt_MonoPatBinds ),
1220 -- Deprecated in favour of -XExtendedDefaultRules:
1221 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1222 -- Deprecated in favour of -XImplicitParams:
1223 ( "implicit-params", Opt_ImplicitParams ),
1224 -- Deprecated in favour of -XScopedTypeVariables:
1225 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1226 -- Deprecated in favour of -XPArr:
1227 ( "parr", Opt_PArr ),
1228 -- Deprecated in favour of -XOverlappingInstances:
1229 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1230 -- Deprecated in favour of -XUndecidableInstances:
1231 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1232 -- Deprecated in favour of -XIncoherentInstances:
1233 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1234 ( "gen-manifest", Opt_GenManifest ),
1235 ( "embed-manifest", Opt_EmbedManifest )
1238 supportedLanguages :: [String]
1239 supportedLanguages = map fst xFlags
1241 -- These -X<blah> flags can all be reversed with -XNo<blah>
1242 xFlags :: [(String, DynFlag)]
1245 ( "PatternGuards", Opt_PatternGuards ),
1246 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1247 ( "MagicHash", Opt_MagicHash ),
1248 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1249 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1250 ( "KindSignatures", Opt_KindSignatures ),
1251 ( "PatternSignatures", Opt_PatternSignatures ),
1252 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1253 ( "ParallelListComp", Opt_ParallelListComp ),
1254 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1255 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1256 ( "PartiallyAppliedClosedTypeSynonyms",
1257 Opt_PartiallyAppliedClosedTypeSynonyms ),
1258 ( "Rank2Types", Opt_Rank2Types ),
1259 ( "RankNTypes", Opt_RankNTypes ),
1260 ( "TypeOperators", Opt_TypeOperators ),
1261 ( "RecursiveDo", Opt_RecursiveDo ),
1262 ( "Arrows", Opt_Arrows ),
1263 ( "PArr", Opt_PArr ),
1264 ( "TemplateHaskell", Opt_TemplateHaskell ),
1265 ( "Generics", Opt_Generics ),
1267 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1268 ( "RecordWildCards", Opt_RecordWildCards ),
1269 ( "RecordPuns", Opt_RecordPuns ),
1270 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1271 ( "OverloadedStrings", Opt_OverloadedStrings ),
1272 ( "GADTs", Opt_GADTs ),
1273 ( "TypeFamilies", Opt_TypeFamilies ),
1274 ( "BangPatterns", Opt_BangPatterns ),
1276 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1277 -- On by default (which is not strictly H98):
1278 ( "MonoPatBinds", Opt_MonoPatBinds ),
1279 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1280 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1281 ( "ImplicitParams", Opt_ImplicitParams ),
1282 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1283 ( "UnboxedTuples", Opt_UnboxedTuples ),
1284 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1285 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1286 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1287 ( "FlexibleContexts", Opt_FlexibleContexts ),
1288 ( "FlexibleInstances", Opt_FlexibleInstances ),
1289 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1290 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1291 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1292 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1293 ( "OverlappingInstances", Opt_OverlappingInstances ),
1294 ( "UndecidableInstances", Opt_UndecidableInstances ),
1295 ( "IncoherentInstances", Opt_IncoherentInstances )
1298 impliedFlags :: [(DynFlag, [DynFlag])]
1300 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1303 glasgowExtsFlags = [
1304 Opt_PrintExplicitForalls
1305 , Opt_ForeignFunctionInterface
1306 , Opt_UnliftedFFITypes
1308 , Opt_ImplicitParams
1309 , Opt_ScopedTypeVariables
1311 , Opt_TypeSynonymInstances
1312 , Opt_StandaloneDeriving
1313 , Opt_DeriveDataTypeable
1314 , Opt_FlexibleContexts
1315 , Opt_FlexibleInstances
1316 , Opt_ConstrainedClassMethods
1317 , Opt_MultiParamTypeClasses
1318 , Opt_FunctionalDependencies
1320 , Opt_PolymorphicComponents
1321 , Opt_ExistentialQuantification
1324 , Opt_PartiallyAppliedClosedTypeSynonyms
1328 , Opt_ParallelListComp
1329 , Opt_EmptyDataDecls
1330 , Opt_KindSignatures
1331 , Opt_PatternSignatures
1332 , Opt_GeneralizedNewtypeDeriving
1333 , Opt_TypeFamilies ]
1336 isFlag :: [(String,a)] -> String -> Bool
1337 isFlag flags f = any (\(ff,_) -> ff == f) flags
1339 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1340 isPrefFlag pref flags no_f
1341 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1345 getFlag :: [(String,a)] -> String -> a
1346 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1348 [] -> panic ("get_flag " ++ f)
1350 getPrefFlag :: String -> [(String,a)] -> String -> a
1351 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1352 -- We should only be passed flags which match the prefix
1354 -- -----------------------------------------------------------------------------
1355 -- Parsing the dynamic flags.
1357 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1358 parseDynamicFlags dflags args = do
1359 let ((leftover,errs),dflags')
1360 = runCmdLine (processArgs dynamic_flags args) dflags
1361 when (not (null errs)) $ do
1362 throwDyn (UsageError (unlines errs))
1363 return (dflags', leftover)
1366 type DynP = CmdLineP DynFlags
1368 upd :: (DynFlags -> DynFlags) -> DynP ()
1370 dfs <- getCmdLineState
1371 putCmdLineState $! (f dfs)
1373 --------------------------
1374 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1375 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1377 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1378 -- When you set f, set the ones it implies
1379 -- When you un-set f, however, we don't un-set the things it implies
1380 -- (except for -fno-glasgow-exts, which is treated specially)
1382 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1384 --------------------------
1385 setDumpFlag :: DynFlag -> OptKind DynP
1386 setDumpFlag dump_flag
1387 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1388 -- Whenver we -ddump, switch off the recompilation checker,
1389 -- else you don't see the dump!
1391 setVerbosity :: Maybe Int -> DynP ()
1392 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1394 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1396 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1399 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1401 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1403 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1406 | Nothing <- unpackPackageId pid
1407 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1409 = \s -> s{ thisPackage = pid }
1411 pid = stringToPackageId p
1413 -- If we're linking a binary, then only targets that produce object
1414 -- code are allowed (requests for other target types are ignored).
1415 setTarget l = upd set
1418 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1421 -- Changes the target only if we're compiling object code. This is
1422 -- used by -fasm and -fvia-C, which switch from one to the other, but
1423 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1424 -- can be safely used in an OPTIONS_GHC pragma.
1425 setObjTarget l = upd set
1428 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1431 setOptLevel :: Int -> DynFlags -> DynFlags
1432 setOptLevel n dflags
1433 | hscTarget dflags == HscInterpreted && n > 0
1435 -- not in IO any more, oh well:
1436 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1438 = updOptLevel n dflags
1441 setMainIs :: String -> DynP ()
1443 | not (null main_fn) -- The arg looked like "Foo.baz"
1444 = upd $ \d -> d{ mainFunIs = Just main_fn,
1445 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1447 | isUpper (head main_mod) -- The arg looked like "Foo"
1448 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1450 | otherwise -- The arg looked like "baz"
1451 = upd $ \d -> d{ mainFunIs = Just main_mod }
1453 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1455 -----------------------------------------------------------------------------
1456 -- Paths & Libraries
1458 -- -i on its own deletes the import paths
1459 addImportPath "" = upd (\s -> s{importPaths = []})
1460 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1464 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1467 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1469 addFrameworkPath p =
1470 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1472 split_marker = ':' -- not configurable (ToDo)
1474 splitPathList :: String -> [String]
1475 splitPathList s = filter notNull (splitUp s)
1476 -- empty paths are ignored: there might be a trailing
1477 -- ':' in the initial list, for example. Empty paths can
1478 -- cause confusion when they are translated into -I options
1479 -- for passing to gcc.
1481 #ifndef mingw32_TARGET_OS
1482 splitUp xs = split split_marker xs
1484 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1486 -- That is, if "foo:bar:baz" is used, this interpreted as
1487 -- consisting of three entries, 'foo', 'bar', 'baz'.
1488 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1489 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1491 -- Notice that no attempt is made to fully replace the 'standard'
1492 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1493 -- that this will cause too much breakage for users & ':' will
1494 -- work fine even with DOS paths, if you're not insisting on being silly.
1497 splitUp (x:':':div:xs) | div `elem` dir_markers
1498 = ((x:':':div:p): splitUp rs)
1500 (p,rs) = findNextPath xs
1501 -- we used to check for existence of the path here, but that
1502 -- required the IO monad to be threaded through the command-line
1503 -- parser which is quite inconvenient. The
1504 splitUp xs = cons p (splitUp rs)
1506 (p,rs) = findNextPath xs
1511 -- will be called either when we've consumed nought or the
1512 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1513 -- finding the next split marker.
1515 case break (`elem` split_markers) xs of
1516 (p, d:ds) -> (p, ds)
1519 split_markers :: [Char]
1520 split_markers = [':', ';']
1522 dir_markers :: [Char]
1523 dir_markers = ['/', '\\']
1526 -- -----------------------------------------------------------------------------
1527 -- tmpDir, where we store temporary files.
1529 setTmpDir :: FilePath -> DynFlags -> DynFlags
1530 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1532 #if !defined(mingw32_HOST_OS)
1533 canonicalise p = normalisePath p
1535 -- Canonicalisation of temp path under win32 is a bit more
1536 -- involved: (a) strip trailing slash,
1537 -- (b) normalise slashes
1538 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1540 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1542 -- if we're operating under cygwin, and TMP/TEMP is of
1543 -- the form "/cygdrive/drive/path", translate this to
1544 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1545 -- understand /cygdrive paths.)
1547 | "/cygdrive/" `isPrefixOf` path =
1548 case drop (length "/cygdrive/") path of
1549 drive:xs@('/':_) -> drive:':':xs
1553 -- strip the trailing backslash (awful, but we only do this once).
1554 removeTrailingSlash path =
1561 -----------------------------------------------------------------------------
1564 setOptHpcDir :: String -> DynP ()
1565 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1567 -----------------------------------------------------------------------------
1568 -- Via-C compilation stuff
1570 -- There are some options that we need to pass to gcc when compiling
1571 -- Haskell code via C, but are only supported by recent versions of
1572 -- gcc. The configure script decides which of these options we need,
1573 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1574 -- read before each via-C compilation. The advantage of having these
1575 -- in a separate file is that the file can be created at install-time
1576 -- depending on the available gcc version, and even re-generated later
1577 -- if gcc is upgraded.
1579 -- The options below are not dependent on the version of gcc, only the
1582 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1583 [String]) -- for registerised HC compilations
1584 machdepCCOpts dflags
1585 #if alpha_TARGET_ARCH
1587 #ifdef HAVE_THREADED_RTS_SUPPORT
1591 -- For now, to suppress the gcc warning "call-clobbered
1592 -- register used for global register variable", we simply
1593 -- disable all warnings altogether using the -w flag. Oh well.
1595 #elif hppa_TARGET_ARCH
1596 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1597 -- (very nice, but too bad the HP /usr/include files don't agree.)
1598 = ( ["-D_HPUX_SOURCE"], [] )
1600 #elif m68k_TARGET_ARCH
1601 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1602 -- popping of args to routines to be explicit; if we let things
1603 -- be deferred 'til after an STGJUMP, imminent death is certain!
1605 -- -fomit-frame-pointer : *don't*
1606 -- It's better to have a6 completely tied up being a frame pointer
1607 -- rather than let GCC pick random things to do with it.
1608 -- (If we want to steal a6, then we would try to do things
1609 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1610 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1612 #elif i386_TARGET_ARCH
1613 -- -fno-defer-pop : basically the same game as for m68k
1615 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1616 -- the fp (%ebp) for our register maps.
1617 = let n_regs = stolen_x86_regs dflags
1620 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1621 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1624 "-fomit-frame-pointer",
1625 -- we want -fno-builtin, because when gcc inlines
1626 -- built-in functions like memcpy() it tends to
1627 -- run out of registers, requiring -monly-n-regs
1629 "-DSTOLEN_X86_REGS="++show n_regs ]
1632 #elif ia64_TARGET_ARCH
1633 = ( [], ["-fomit-frame-pointer", "-G0"] )
1635 #elif x86_64_TARGET_ARCH
1636 = ( [], ["-fomit-frame-pointer",
1637 "-fno-asynchronous-unwind-tables",
1638 -- the unwind tables are unnecessary for HC code,
1639 -- and get in the way of -split-objs. Another option
1640 -- would be to throw them away in the mangler, but this
1643 -- calling builtins like strlen() using the FFI can
1644 -- cause gcc to run out of regs, so use the external
1648 #elif sparc_TARGET_ARCH
1650 -- For now, to suppress the gcc warning "call-clobbered
1651 -- register used for global register variable", we simply
1652 -- disable all warnings altogether using the -w flag. Oh well.
1654 #elif powerpc_apple_darwin_TARGET
1656 -- Disable Apple's precompiling preprocessor. It's a great thing
1657 -- for "normal" programs, but it doesn't support register variable
1659 = ( [], ["-no-cpp-precomp"] )
1664 picCCOpts :: DynFlags -> [String]
1666 #if darwin_TARGET_OS
1667 -- Apple prefers to do things the other way round.
1668 -- PIC is on by default.
1669 -- -mdynamic-no-pic:
1670 -- Turn off PIC code generation.
1672 -- Don't generate "common" symbols - these are unwanted
1673 -- in dynamic libraries.
1676 = ["-fno-common", "-D__PIC__"]
1678 = ["-mdynamic-no-pic"]
1679 #elif mingw32_TARGET_OS
1680 -- no -fPIC for Windows
1687 = ["-fPIC", "-D__PIC__"]
1692 -- -----------------------------------------------------------------------------
1696 can_split = cSplitObjs == "YES"
1698 -- -----------------------------------------------------------------------------
1701 compilerInfo :: [(String, String)]
1702 compilerInfo = [("Project name", cProjectName),
1703 ("Project version", cProjectVersion),
1704 ("Booter version", cBooterVersion),
1706 ("Interface file version", cHscIfaceFileVersion),
1707 ("Have interpreter", cGhcWithInterpreter),
1708 ("Object splitting", cSplitObjs),
1709 ("Have native code generator", cGhcWithNativeCodeGen),
1710 ("Support SMP", cGhcWithSMP),
1711 ("Unregisterised", cGhcUnregisterised),
1712 ("Tables next to code", cGhcEnableTablesNextToCode),
1713 ("Win32 DLLs", cEnableWin32DLLs),
1714 ("RTS ways", cGhcRTSWays),
1715 ("Leading underscore", cLeadingUnderscore)]