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 -----------------------------------------------------------------------------
20 HscTarget(..), isObjectTarget, defaultObjectTarget,
21 GhcMode(..), isOneShot,
22 GhcLink(..), isNoLink,
26 -- Configuration of the core-to-core and stg-to-stg phases
30 SimplifierMode(..), FloatOutSwitches(..),
31 getCoreToDo, getStgToDo,
33 -- Manipulating DynFlags
34 defaultDynFlags, -- DynFlags
35 initDynFlags, -- DynFlags -> IO DynFlags
37 dopt, -- DynFlag -> DynFlags -> Bool
38 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
39 getOpts, -- (DynFlags -> [a]) -> IO [a]
50 machdepCCOpts, picCCOpts,
55 #include "HsVersions.h"
57 import Module ( Module, mkModuleName, mkModule, ModLocation )
59 import PrelNames ( mAIN )
60 #ifdef i386_TARGET_ARCH
61 import StaticFlags ( opt_Static )
63 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
65 import {-# SOURCE #-} Packages (PackageState)
66 import DriverPhases ( Phase(..), phaseInputExt )
69 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
70 import Panic ( panic, GhcException(..) )
71 import UniqFM ( UniqFM )
73 import Maybes ( orElse, fromJust )
74 import SrcLoc ( SrcSpan )
76 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
78 import Data.IORef ( readIORef )
79 import Control.Exception ( throwDyn )
80 import Control.Monad ( when )
81 #ifdef mingw32_TARGET_OS
82 import Data.List ( isPrefixOf )
87 import Data.Char ( isUpper, toLower )
88 import System.IO ( hPutStrLn, stderr )
90 -- -----------------------------------------------------------------------------
99 | Opt_D_dump_asm_native
100 | Opt_D_dump_asm_liveness
101 | Opt_D_dump_asm_coalesce
102 | Opt_D_dump_asm_regalloc
103 | Opt_D_dump_asm_regalloc_stages
104 | Opt_D_dump_asm_conflicts
105 | Opt_D_dump_asm_stats
111 | Opt_D_dump_inlinings
112 | Opt_D_dump_rule_firings
113 | Opt_D_dump_occur_anal
117 | Opt_D_dump_simpl_iterations
126 | Opt_D_dump_worker_wrapper
127 | Opt_D_dump_rn_trace
128 | Opt_D_dump_rn_stats
130 | Opt_D_dump_simpl_stats
131 | Opt_D_dump_tc_trace
132 | Opt_D_dump_if_trace
138 | Opt_D_verbose_core2core
139 | Opt_D_verbose_stg2stg
141 | Opt_D_dump_hi_diffs
142 | Opt_D_dump_minimal_imports
143 | Opt_D_dump_mod_cycles
144 | Opt_D_faststring_stats
145 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
150 | Opt_WarnIsError -- -Werror; makes warnings fatal
151 | Opt_WarnDuplicateExports
153 | Opt_WarnImplicitPrelude
154 | Opt_WarnIncompletePatterns
155 | Opt_WarnIncompletePatternsRecUpd
156 | Opt_WarnMissingFields
157 | Opt_WarnMissingMethods
158 | Opt_WarnMissingSigs
159 | Opt_WarnNameShadowing
160 | Opt_WarnOverlappingPatterns
161 | Opt_WarnSimplePatterns
162 | Opt_WarnTypeDefaults
163 | Opt_WarnMonomorphism
164 | Opt_WarnUnusedBinds
165 | Opt_WarnUnusedImports
166 | Opt_WarnUnusedMatches
167 | Opt_WarnDeprecations
168 | Opt_WarnDodgyImports
173 | Opt_OverlappingInstances
174 | Opt_UndecidableInstances
175 | Opt_IncoherentInstances
176 | Opt_MonomorphismRestriction
178 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
179 | Opt_ForeignFunctionInterface
180 | Opt_UnliftedFFITypes
181 | Opt_PArr -- Syntactic support for parallel arrays
182 | Opt_Arrows -- Arrow-notation syntax
183 | Opt_TemplateHaskell
186 | Opt_ImplicitPrelude
187 | Opt_ScopedTypeVariables
191 | Opt_OverloadedStrings
192 | Opt_DisambiguateRecordFields
193 | Opt_RecordWildCards
197 | Opt_StandaloneDeriving
198 | Opt_DeriveDataTypeable
199 | Opt_TypeSynonymInstances
200 | Opt_FlexibleContexts
201 | Opt_FlexibleInstances
202 | Opt_ConstrainedClassMethods
203 | Opt_MultiParamTypeClasses
204 | Opt_FunctionalDependencies
206 | Opt_PolymorphicComponents
207 | Opt_ExistentialQuantification
211 | Opt_PatternSignatures
212 | Opt_ParallelListComp
213 | Opt_GeneralizedNewtypeDeriving
216 | Opt_PartiallyAppliedClosedTypeSynonyms
221 | Opt_PrintExplicitForalls
229 | Opt_IgnoreInterfacePragmas
230 | Opt_OmitInterfacePragmas
231 | Opt_DoLambdaEtaExpansion
233 | Opt_IgnoreBreakpoints
236 | Opt_UnboxStrictFields
248 | Opt_ExcessPrecision
249 | Opt_ReadUserPackageConf
253 | Opt_HideAllPackages
254 | Opt_PrintBindResult
257 | Opt_BreakOnException
270 data DynFlags = DynFlags {
273 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
274 stgToDo :: Maybe [StgToDo], -- similarly
275 hscTarget :: HscTarget,
276 hscOutName :: String, -- name of the output file
277 extCoreName :: String, -- name of the .core output file
278 verbosity :: Int, -- verbosity level
279 optLevel :: Int, -- optimisation level
280 maxSimplIterations :: Int, -- max simplifier iterations
281 ruleCheck :: Maybe String,
283 specThreshold :: Int, -- Threshold for function specialisation
285 stolen_x86_regs :: Int,
286 cmdlineHcIncludes :: [String], -- -#includes
287 importPaths :: [FilePath],
289 mainFunIs :: Maybe String,
290 ctxtStkDepth :: Int, -- Typechecker context stack depth
292 thisPackage :: PackageId,
295 wayNames :: [WayName], -- way flags from the cmd line
296 buildTag :: String, -- the global "way" (eg. "p" for prof)
297 rtsBuildTag :: String, -- the RTS "way"
300 objectDir :: Maybe String,
301 hiDir :: Maybe String,
302 stubDir :: Maybe String,
308 outputFile :: Maybe String,
309 outputHi :: Maybe String,
311 -- | This is set by DriverPipeline.runPipeline based on where
312 -- its output is going.
313 dumpPrefix :: Maybe FilePath,
315 -- | Override the dumpPrefix set by runPipeline.
316 -- Set by -ddump-file-prefix
317 dumpPrefixForce :: Maybe FilePath,
319 includePaths :: [String],
320 libraryPaths :: [String],
321 frameworkPaths :: [String], -- used on darwin only
322 cmdlineFrameworks :: [String], -- ditto
323 tmpDir :: String, -- no trailing '/'
325 ghcUsagePath :: FilePath, -- Filled in by SysTools
326 ghciUsagePath :: FilePath, -- ditto
328 hpcDir :: String, -- ^ path to store the .mix files
330 -- options for particular phases
339 opt_windres :: [String],
341 -- commands for particular phases
343 pgm_P :: (String,[Option]),
345 pgm_c :: (String,[Option]),
346 pgm_m :: (String,[Option]),
347 pgm_s :: (String,[Option]),
348 pgm_a :: (String,[Option]),
349 pgm_l :: (String,[Option]),
350 pgm_dll :: (String,[Option]),
352 pgm_sysman :: String,
353 pgm_windres :: String,
356 extraPkgConfs :: [FilePath],
357 topDir :: FilePath, -- filled in by SysTools
358 systemPackageConfig :: FilePath, -- ditto
359 -- The -package-conf flags given on the command line, in the order
362 packageFlags :: [PackageFlag],
363 -- The -package and -hide-package flags from the command-line
366 -- NB. do not modify this field, it is calculated by
367 -- Packages.initPackages and Packages.updatePackages.
368 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
369 pkgState :: PackageState,
375 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
386 -- | will this target result in an object file on the disk?
387 isObjectTarget :: HscTarget -> Bool
388 isObjectTarget HscC = True
389 isObjectTarget HscAsm = True
390 isObjectTarget _ = False
392 -- | The 'GhcMode' tells us whether we're doing multi-module
393 -- compilation (controlled via the "GHC" API) or one-shot
394 -- (single-module) compilation. This makes a difference primarily to
395 -- the "Finder": in one-shot mode we look for interface files for
396 -- imported modules, but in multi-module mode we look for source files
397 -- in order to check whether they need to be recompiled.
399 = CompManager -- ^ --make, GHCi, etc.
400 | OneShot -- ^ ghc -c Foo.hs
401 | MkDepend -- ^ ghc -M, see Finder for why we need this
404 isOneShot :: GhcMode -> Bool
405 isOneShot OneShot = True
406 isOneShot _other = False
408 -- | What kind of linking to do.
409 data GhcLink -- What to do in the link step, if there is one
410 = NoLink -- Don't link at all
411 | LinkBinary -- Link object code into a binary
412 | LinkInMemory -- Use the in-memory dynamic linker
413 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
416 isNoLink :: GhcLink -> Bool
417 isNoLink NoLink = True
418 isNoLink other = False
421 = ExposePackage String
423 | IgnorePackage String
426 defaultHscTarget = defaultObjectTarget
428 -- | the 'HscTarget' value corresponding to the default way to create
429 -- object files on the current platform.
431 | cGhcWithNativeCodeGen == "YES" = HscAsm
434 initDynFlags dflags = do
435 -- someday these will be dynamic flags
436 ways <- readIORef v_Ways
437 build_tag <- readIORef v_Build_tag
438 rts_build_tag <- readIORef v_RTS_Build_tag
441 buildTag = build_tag,
442 rtsBuildTag = rts_build_tag
447 ghcMode = CompManager,
448 ghcLink = LinkBinary,
451 hscTarget = defaultHscTarget,
456 maxSimplIterations = 4,
460 cmdlineHcIncludes = [],
464 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
466 thisPackage = mainPackageId,
472 objectSuf = phaseInputExt StopLn,
473 hcSuf = phaseInputExt HCc,
476 outputFile = Nothing,
478 dumpPrefix = Nothing,
479 dumpPrefixForce = Nothing,
483 cmdlineFrameworks = [],
484 tmpDir = cDEFAULT_TMPDIR,
502 pkgDatabase = Nothing,
503 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
505 Opt_ReadUserPackageConf,
507 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
508 -- behaviour the default, to see if anyone notices
512 Opt_MonomorphismRestriction,
520 Opt_PrintBindResult ]
521 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
522 -- The default -O0 options
525 log_action = \severity srcSpan style msg ->
527 SevInfo -> hPutStrLn stderr (show (msg style))
528 SevFatal -> hPutStrLn stderr (show (msg style))
529 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
535 0 | print errors & warnings only
536 1 | minimal verbosity: print "compiling M ... done." for each module.
537 2 | equivalent to -dshow-passes
538 3 | equivalent to existing "ghc -v"
539 4 | "ghc -v -ddump-most"
540 5 | "ghc -v -ddump-all"
543 dopt :: DynFlag -> DynFlags -> Bool
544 dopt f dflags = f `elem` (flags dflags)
546 dopt_set :: DynFlags -> DynFlag -> DynFlags
547 dopt_set dfs f = dfs{ flags = f : flags dfs }
549 dopt_unset :: DynFlags -> DynFlag -> DynFlags
550 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
552 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
553 getOpts dflags opts = reverse (opts dflags)
554 -- We add to the options from the front, so we need to reverse the list
556 getVerbFlag :: DynFlags -> String
558 | verbosity dflags >= 3 = "-v"
561 setObjectDir f d = d{ objectDir = f}
562 setHiDir f d = d{ hiDir = f}
563 setStubDir f d = d{ stubDir = f}
565 setObjectSuf f d = d{ objectSuf = f}
566 setHiSuf f d = d{ hiSuf = f}
567 setHcSuf f d = d{ hcSuf = f}
569 setOutputFile f d = d{ outputFile = f}
570 setOutputHi f d = d{ outputHi = f}
572 setDumpPrefixForce f d = d { dumpPrefixForce = f}
574 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
575 -- Config.hs should really use Option.
576 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
578 setPgmL f d = d{ pgm_L = f}
579 setPgmF f d = d{ pgm_F = f}
580 setPgmc f d = d{ pgm_c = (f,[])}
581 setPgmm f d = d{ pgm_m = (f,[])}
582 setPgms f d = d{ pgm_s = (f,[])}
583 setPgma f d = d{ pgm_a = (f,[])}
584 setPgml f d = d{ pgm_l = (f,[])}
585 setPgmdll f d = d{ pgm_dll = (f,[])}
586 setPgmwindres f d = d{ pgm_windres = f}
588 addOptL f d = d{ opt_L = f : opt_L d}
589 addOptP f d = d{ opt_P = f : opt_P d}
590 addOptF f d = d{ opt_F = f : opt_F d}
591 addOptc f d = d{ opt_c = f : opt_c d}
592 addOptm f d = d{ opt_m = f : opt_m d}
593 addOpta f d = d{ opt_a = f : opt_a d}
594 addOptl f d = d{ opt_l = f : opt_l d}
595 addOptdep f d = d{ opt_dep = f : opt_dep d}
596 addOptwindres f d = d{ opt_windres = f : opt_windres d}
598 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
600 -- -----------------------------------------------------------------------------
601 -- Command-line options
603 -- When invoking external tools as part of the compilation pipeline, we
604 -- pass these a sequence of options on the command-line. Rather than
605 -- just using a list of Strings, we use a type that allows us to distinguish
606 -- between filepaths and 'other stuff'. [The reason being, of course, that
607 -- this type gives us a handle on transforming filenames, and filenames only,
608 -- to whatever format they're expected to be on a particular platform.]
611 = FileOption -- an entry that _contains_ filename(s) / filepaths.
612 String -- a non-filepath prefix that shouldn't be
613 -- transformed (e.g., "/out=")
614 String -- the filepath/filename portion
617 -----------------------------------------------------------------------------
618 -- Setting the optimisation level
620 updOptLevel :: Int -> DynFlags -> DynFlags
621 -- Set dynflags appropriate to the optimisation level
623 = dfs2{ optLevel = final_n }
625 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
626 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
627 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
629 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
630 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
632 optLevelFlags :: [([Int], DynFlag)]
634 = [ ([0], Opt_IgnoreInterfacePragmas)
635 , ([0], Opt_OmitInterfacePragmas)
637 , ([1,2], Opt_IgnoreAsserts)
638 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
640 , ([1,2], Opt_DoEtaReduction)
641 , ([1,2], Opt_CaseMerge)
642 , ([1,2], Opt_Strictness)
644 , ([1,2], Opt_FullLaziness)
646 , ([2], Opt_LiberateCase)
647 , ([2], Opt_SpecConstr)
649 , ([0,1,2], Opt_DoLambdaEtaExpansion)
650 -- This one is important for a tiresome reason:
651 -- we want to make sure that the bindings for data
652 -- constructors are eta-expanded. This is probably
653 -- a good thing anyway, but it seems fragile.
656 -- -----------------------------------------------------------------------------
657 -- Standard sets of warning options
660 = [ Opt_WarnDeprecations,
661 Opt_WarnOverlappingPatterns,
662 Opt_WarnMissingFields,
663 Opt_WarnMissingMethods,
664 Opt_WarnDuplicateExports
668 = standardWarnings ++
669 [ Opt_WarnUnusedBinds,
670 Opt_WarnUnusedMatches,
671 Opt_WarnUnusedImports,
672 Opt_WarnIncompletePatterns,
678 [ Opt_WarnTypeDefaults,
679 Opt_WarnNameShadowing,
685 -- minuswRemovesOpts should be every warning option
688 [Opt_WarnImplicitPrelude,
689 Opt_WarnIncompletePatternsRecUpd,
690 Opt_WarnSimplePatterns,
691 Opt_WarnMonomorphism,
695 -- -----------------------------------------------------------------------------
696 -- CoreToDo: abstraction of core-to-core passes to run.
698 data CoreToDo -- These are diff core-to-core passes,
699 -- which may be invoked in any order,
700 -- as many times as you like.
702 = CoreDoSimplify -- The core-to-core simplifier.
705 -- Each run of the simplifier can take a different
706 -- set of simplifier-specific flags.
708 | CoreDoFloatOutwards FloatOutSwitches
713 | CoreDoWorkerWrapper
716 | CoreDoOldStrictness
719 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
720 -- matching this string
721 | CoreDoVectorisation
722 | CoreDoNothing -- Useful when building up
723 | CoreDoPasses [CoreToDo] -- lists of these things
725 data SimplifierMode -- See comments in SimplMonad
729 data SimplifierSwitch
730 = MaxSimplifierIterations Int
733 data FloatOutSwitches
734 = FloatOutSw Bool -- True <=> float lambdas to top level
735 Bool -- True <=> float constants to top level,
736 -- even if they do not escape a lambda
739 -- The core-to-core pass ordering is derived from the DynFlags:
740 runWhen :: Bool -> CoreToDo -> CoreToDo
741 runWhen True do_this = do_this
742 runWhen False do_this = CoreDoNothing
744 getCoreToDo :: DynFlags -> [CoreToDo]
746 | Just todo <- coreToDo dflags = todo -- set explicitly by user
747 | otherwise = core_todo
749 opt_level = optLevel dflags
750 max_iter = maxSimplIterations dflags
751 strictness = dopt Opt_Strictness dflags
752 full_laziness = dopt Opt_FullLaziness dflags
753 cse = dopt Opt_CSE dflags
754 spec_constr = dopt Opt_SpecConstr dflags
755 liberate_case = dopt Opt_LiberateCase dflags
756 rule_check = ruleCheck dflags
757 vectorisation = dopt Opt_Vectorise dflags
760 if opt_level == 0 then
762 CoreDoSimplify (SimplPhase 0) [
763 MaxSimplifierIterations max_iter
766 else {- opt_level >= 1 -} [
768 -- initial simplify: mk specialiser happy: minimum effort please
769 CoreDoSimplify SimplGently [
771 -- Don't inline anything till full laziness has bitten
772 -- In particular, inlining wrappers inhibits floating
773 -- e.g. ...(case f x of ...)...
774 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
775 -- ==> ...(case x of I# x# -> case fw x# of ...)...
776 -- and now the redex (f x) isn't floatable any more
777 -- Similarly, don't apply any rules until after full
778 -- laziness. Notably, list fusion can prevent floating.
780 NoCaseOfCase, -- Don't do case-of-case transformations.
781 -- This makes full laziness work better
782 MaxSimplifierIterations max_iter
786 -- We run vectorisation here for now, but we might also try to run
788 runWhen vectorisation (CoreDoPasses [
790 CoreDoSimplify SimplGently
792 MaxSimplifierIterations max_iter]]),
794 -- Specialisation is best done before full laziness
795 -- so that overloaded functions have all their dictionary lambdas manifest
798 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
802 CoreDoSimplify (SimplPhase 2) [
803 -- Want to run with inline phase 2 after the specialiser to give
804 -- maximum chance for fusion to work before we inline build/augment
805 -- in phase 1. This made a difference in 'ansi' where an
806 -- overloaded function wasn't inlined till too late.
807 MaxSimplifierIterations max_iter
809 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
811 CoreDoSimplify (SimplPhase 1) [
812 -- Need inline-phase2 here so that build/augment get
813 -- inlined. I found that spectral/hartel/genfft lost some useful
814 -- strictness in the function sumcode' if augment is not inlined
815 -- before strictness analysis runs
816 MaxSimplifierIterations max_iter
818 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
820 CoreDoSimplify (SimplPhase 0) [
821 -- Phase 0: allow all Ids to be inlined now
822 -- This gets foldr inlined before strictness analysis
824 MaxSimplifierIterations 3
825 -- At least 3 iterations because otherwise we land up with
826 -- huge dead expressions because of an infelicity in the
828 -- let k = BIG in foldr k z xs
829 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
830 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
834 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
836 #ifdef OLD_STRICTNESS
839 runWhen strictness (CoreDoPasses [
843 CoreDoSimplify (SimplPhase 0) [
844 MaxSimplifierIterations max_iter
847 runWhen full_laziness
848 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
849 True)), -- Float constants
850 -- nofib/spectral/hartel/wang doubles in speed if you
851 -- do full laziness late in the day. It only happens
852 -- after fusion and other stuff, so the early pass doesn't
853 -- catch it. For the record, the redex is
854 -- f_el22 (f_el21 r_midblock)
858 -- We want CSE to follow the final full-laziness pass, because it may
859 -- succeed in commoning up things floated out by full laziness.
860 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
864 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
866 -- Case-liberation for -O2. This should be after
867 -- strictness analysis and the simplification which follows it.
868 runWhen liberate_case (CoreDoPasses [
870 CoreDoSimplify (SimplPhase 0) [
871 MaxSimplifierIterations max_iter
872 ] ]), -- Run the simplifier after LiberateCase to vastly
873 -- reduce the possiblility of shadowing
874 -- Reason: see Note [Shadowing] in SpecConstr.lhs
876 runWhen spec_constr CoreDoSpecConstr,
878 -- Final clean-up simplification:
879 CoreDoSimplify (SimplPhase 0) [
880 MaxSimplifierIterations max_iter
884 -- -----------------------------------------------------------------------------
885 -- StgToDo: abstraction of stg-to-stg passes to run.
888 = StgDoMassageForProfiling -- should be (next to) last
889 -- There's also setStgVarInfo, but its absolute "lastness"
890 -- is so critical that it is hardwired in (no flag).
893 getStgToDo :: DynFlags -> [StgToDo]
895 | Just todo <- stgToDo dflags = todo -- set explicitly by user
898 stg_stats = dopt Opt_StgStats dflags
900 todo1 = if stg_stats then [D_stg_stats] else []
902 todo2 | WayProf `elem` wayNames dflags
903 = StgDoMassageForProfiling : todo1
907 -- -----------------------------------------------------------------------------
911 allFlags = map ('-':) $
912 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
913 map ("fno-"++) flags ++
915 where ok (PrefixPred _ _) = False
917 flags = map fst fFlags
919 dynamic_flags :: [(String, OptKind DynP)]
921 ( "n" , NoArg (setDynFlag Opt_DryRun) )
922 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
923 , ( "F" , NoArg (setDynFlag Opt_Pp))
924 , ( "#include" , HasArg (addCmdlineHCInclude) )
925 , ( "v" , OptIntSuffix setVerbosity )
927 ------- Specific phases --------------------------------------------
928 , ( "pgmL" , HasArg (upd . setPgmL) )
929 , ( "pgmP" , HasArg (upd . setPgmP) )
930 , ( "pgmF" , HasArg (upd . setPgmF) )
931 , ( "pgmc" , HasArg (upd . setPgmc) )
932 , ( "pgmm" , HasArg (upd . setPgmm) )
933 , ( "pgms" , HasArg (upd . setPgms) )
934 , ( "pgma" , HasArg (upd . setPgma) )
935 , ( "pgml" , HasArg (upd . setPgml) )
936 , ( "pgmdll" , HasArg (upd . setPgmdll) )
937 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
939 , ( "optL" , HasArg (upd . addOptL) )
940 , ( "optP" , HasArg (upd . addOptP) )
941 , ( "optF" , HasArg (upd . addOptF) )
942 , ( "optc" , HasArg (upd . addOptc) )
943 , ( "optm" , HasArg (upd . addOptm) )
944 , ( "opta" , HasArg (upd . addOpta) )
945 , ( "optl" , HasArg (upd . addOptl) )
946 , ( "optdep" , HasArg (upd . addOptdep) )
947 , ( "optwindres" , HasArg (upd . addOptwindres) )
949 , ( "split-objs" , NoArg (if can_split
950 then setDynFlag Opt_SplitObjs
953 -------- Linking ----------------------------------------------------
954 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
955 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
956 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
958 ------- Libraries ---------------------------------------------------
959 , ( "L" , Prefix addLibraryPath )
960 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
962 ------- Frameworks --------------------------------------------------
963 -- -framework-path should really be -F ...
964 , ( "framework-path" , HasArg addFrameworkPath )
965 , ( "framework" , HasArg (upd . addCmdlineFramework) )
967 ------- Output Redirection ------------------------------------------
968 , ( "odir" , HasArg (upd . setObjectDir . Just))
969 , ( "o" , SepArg (upd . setOutputFile . Just))
970 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
971 , ( "osuf" , HasArg (upd . setObjectSuf))
972 , ( "hcsuf" , HasArg (upd . setHcSuf))
973 , ( "hisuf" , HasArg (upd . setHiSuf))
974 , ( "hidir" , HasArg (upd . setHiDir . Just))
975 , ( "tmpdir" , HasArg (upd . setTmpDir))
976 , ( "stubdir" , HasArg (upd . setStubDir . Just))
977 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
979 ------- Keeping temporary files -------------------------------------
980 -- These can be singular (think ghc -c) or plural (think ghc --make)
981 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
982 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
983 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
984 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
985 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
986 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
987 -- This only makes sense as plural
988 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
990 ------- Miscellaneous ----------------------------------------------
991 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
992 , ( "main-is" , SepArg setMainIs )
993 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
994 , ( "hpcdir" , SepArg setOptHpcDir )
996 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
997 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
998 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1000 ------- Packages ----------------------------------------------------
1001 , ( "package-conf" , HasArg extraPkgConf_ )
1002 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1003 , ( "package-name" , HasArg (upd . setPackageName) )
1004 , ( "package" , HasArg exposePackage )
1005 , ( "hide-package" , HasArg hidePackage )
1006 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1007 , ( "ignore-package" , HasArg ignorePackage )
1008 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1010 ------ HsCpp opts ---------------------------------------------------
1011 , ( "D", AnySuffix (upd . addOptP) )
1012 , ( "U", AnySuffix (upd . addOptP) )
1014 ------- Include/Import Paths ----------------------------------------
1015 , ( "I" , Prefix addIncludePath)
1016 , ( "i" , OptPrefix addImportPath )
1018 ------ Debugging ----------------------------------------------------
1019 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1021 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1022 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1023 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1024 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1025 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1026 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1027 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1028 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1029 , ( "ddump-asm-regalloc-stages",
1030 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1031 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1032 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1033 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1034 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1035 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1036 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1037 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1038 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1039 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1040 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1041 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1042 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1043 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1044 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1045 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1046 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1047 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1048 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1049 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1050 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1051 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1052 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1053 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1054 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1055 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1056 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1057 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1058 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1059 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1060 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1061 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1062 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1063 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1064 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1065 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1066 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1067 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1068 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1069 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1070 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1071 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1072 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1073 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1074 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1075 setVerbosity (Just 2)) )
1076 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1078 ------ Machine dependant (-m<blah>) stuff ---------------------------
1080 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1081 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1082 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1084 ------ Warning opts -------------------------------------------------
1085 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1086 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
1087 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1088 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
1089 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1091 ------ Optimisation flags ------------------------------------------
1092 , ( "O" , NoArg (upd (setOptLevel 1)))
1093 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1094 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1095 -- If the number is missing, use 1
1097 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1098 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1100 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1101 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1102 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1104 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1105 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1107 ------ Compiler flags -----------------------------------------------
1109 , ( "fasm", NoArg (setObjTarget HscAsm) )
1110 , ( "fvia-c", NoArg (setObjTarget HscC) )
1111 , ( "fvia-C", NoArg (setObjTarget HscC) )
1113 , ( "fno-code", NoArg (setTarget HscNothing))
1114 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1115 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1117 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1118 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1120 -- the rest of the -f* and -fno-* flags
1121 , ( "f", PrefixPred (isFlag fFlags)
1122 (\f -> setDynFlag (getFlag fFlags f)) )
1123 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1124 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1126 -- the -X* and -XNo* flags
1127 , ( "X", PrefixPred (isFlag xFlags)
1128 (\f -> setDynFlag (getFlag xFlags f)) )
1129 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1130 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1133 -- these -f<blah> flags can all be reversed with -fno-<blah>
1136 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1137 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1138 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1139 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1140 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1141 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1142 ( "warn-missing-fields", Opt_WarnMissingFields ),
1143 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1144 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1145 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1146 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1147 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1148 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1149 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1150 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1151 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1152 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1153 ( "warn-deprecations", Opt_WarnDeprecations ),
1154 ( "warn-orphans", Opt_WarnOrphans ),
1155 ( "warn-tabs", Opt_WarnTabs ),
1156 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1157 ( "strictness", Opt_Strictness ),
1158 ( "full-laziness", Opt_FullLaziness ),
1159 ( "liberate-case", Opt_LiberateCase ),
1160 ( "spec-constr", Opt_SpecConstr ),
1162 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1163 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1164 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1165 ( "ignore-asserts", Opt_IgnoreAsserts ),
1166 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1167 ( "do-eta-reduction", Opt_DoEtaReduction ),
1168 ( "case-merge", Opt_CaseMerge ),
1169 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1170 ( "dicts-cheap", Opt_DictsCheap ),
1171 ( "excess-precision", Opt_ExcessPrecision ),
1172 ( "asm-mangling", Opt_DoAsmMangling ),
1173 ( "print-bind-result", Opt_PrintBindResult ),
1174 ( "force-recomp", Opt_ForceRecomp ),
1175 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1176 ( "rewrite-rules", Opt_RewriteRules ),
1177 ( "break-on-exception", Opt_BreakOnException ),
1178 ( "vectorise", Opt_Vectorise ),
1179 ( "regs-graph", Opt_RegsGraph),
1180 -- Deprecated in favour of -XTemplateHaskell:
1181 ( "th", Opt_TemplateHaskell ),
1182 -- Deprecated in favour of -XForeignFunctionInterface:
1183 ( "fi", Opt_ForeignFunctionInterface ),
1184 -- Deprecated in favour of -XForeignFunctionInterface:
1185 ( "ffi", Opt_ForeignFunctionInterface ),
1186 -- Deprecated in favour of -XArrows:
1187 ( "arrows", Opt_Arrows ),
1188 -- Deprecated in favour of -XGenerics:
1189 ( "generics", Opt_Generics ),
1190 -- Deprecated in favour of -XImplicitPrelude:
1191 ( "implicit-prelude", Opt_ImplicitPrelude ),
1192 -- Deprecated in favour of -XBangPatterns:
1193 ( "bang-patterns", Opt_BangPatterns ),
1194 -- Deprecated in favour of -XMonomorphismRestriction:
1195 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1196 -- Deprecated in favour of -XMonoPatBinds:
1197 ( "mono-pat-binds", Opt_MonoPatBinds ),
1198 -- Deprecated in favour of -XExtendedDefaultRules:
1199 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1200 -- Deprecated in favour of -XImplicitParams:
1201 ( "implicit-params", Opt_ImplicitParams ),
1202 -- Deprecated in favour of -XScopedTypeVariables:
1203 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1204 -- Deprecated in favour of -XPArr:
1205 ( "parr", Opt_PArr ),
1206 -- Deprecated in favour of -XOverlappingInstances:
1207 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1208 -- Deprecated in favour of -XUndecidableInstances:
1209 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1210 -- Deprecated in favour of -XIncoherentInstances:
1211 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1212 ( "gen-manifest", Opt_GenManifest ),
1213 ( "embed-manifest", Opt_EmbedManifest )
1216 supportedLanguages :: [String]
1217 supportedLanguages = map fst xFlags
1219 -- These -X<blah> flags can all be reversed with -XNo<blah>
1220 xFlags :: [(String, DynFlag)]
1223 ( "PatternGuards", Opt_PatternGuards ),
1224 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1225 ( "MagicHash", Opt_MagicHash ),
1226 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1227 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1228 ( "KindSignatures", Opt_KindSignatures ),
1229 ( "PatternSignatures", Opt_PatternSignatures ),
1230 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1231 ( "ParallelListComp", Opt_ParallelListComp ),
1232 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1233 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1234 ( "PartiallyAppliedClosedTypeSynonyms",
1235 Opt_PartiallyAppliedClosedTypeSynonyms ),
1236 ( "Rank2Types", Opt_Rank2Types ),
1237 ( "RankNTypes", Opt_RankNTypes ),
1238 ( "TypeOperators", Opt_TypeOperators ),
1239 ( "RecursiveDo", Opt_RecursiveDo ),
1240 ( "Arrows", Opt_Arrows ),
1241 ( "PArr", Opt_PArr ),
1242 ( "TemplateHaskell", Opt_TemplateHaskell ),
1243 ( "Generics", Opt_Generics ),
1245 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1246 ( "RecordWildCards", Opt_RecordWildCards ),
1247 ( "RecordPuns", Opt_RecordPuns ),
1248 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1249 ( "OverloadedStrings", Opt_OverloadedStrings ),
1250 ( "GADTs", Opt_GADTs ),
1251 ( "TypeFamilies", Opt_TypeFamilies ),
1252 ( "BangPatterns", Opt_BangPatterns ),
1254 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1255 -- On by default (which is not strictly H98):
1256 ( "MonoPatBinds", Opt_MonoPatBinds ),
1257 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1258 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1259 ( "ImplicitParams", Opt_ImplicitParams ),
1260 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1261 ( "UnboxedTuples", Opt_UnboxedTuples ),
1262 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1263 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1264 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1265 ( "FlexibleContexts", Opt_FlexibleContexts ),
1266 ( "FlexibleInstances", Opt_FlexibleInstances ),
1267 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1268 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1269 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1270 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1271 ( "OverlappingInstances", Opt_OverlappingInstances ),
1272 ( "UndecidableInstances", Opt_UndecidableInstances ),
1273 ( "IncoherentInstances", Opt_IncoherentInstances )
1276 impliedFlags :: [(DynFlag, [DynFlag])]
1278 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1281 glasgowExtsFlags = [
1282 Opt_PrintExplicitForalls
1283 , Opt_ForeignFunctionInterface
1284 , Opt_UnliftedFFITypes
1286 , Opt_ImplicitParams
1287 , Opt_ScopedTypeVariables
1289 , Opt_TypeSynonymInstances
1290 , Opt_StandaloneDeriving
1291 , Opt_DeriveDataTypeable
1292 , Opt_FlexibleContexts
1293 , Opt_FlexibleInstances
1294 , Opt_ConstrainedClassMethods
1295 , Opt_MultiParamTypeClasses
1296 , Opt_FunctionalDependencies
1298 , Opt_PolymorphicComponents
1299 , Opt_ExistentialQuantification
1302 , Opt_PartiallyAppliedClosedTypeSynonyms
1306 , Opt_ParallelListComp
1307 , Opt_EmptyDataDecls
1308 , Opt_KindSignatures
1309 , Opt_PatternSignatures
1310 , Opt_GeneralizedNewtypeDeriving
1311 , Opt_TypeFamilies ]
1314 isFlag :: [(String,a)] -> String -> Bool
1315 isFlag flags f = any (\(ff,_) -> ff == f) flags
1317 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1318 isPrefFlag pref flags no_f
1319 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1323 getFlag :: [(String,a)] -> String -> a
1324 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1326 [] -> panic ("get_flag " ++ f)
1328 getPrefFlag :: String -> [(String,a)] -> String -> a
1329 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1330 -- We should only be passed flags which match the prefix
1332 -- -----------------------------------------------------------------------------
1333 -- Parsing the dynamic flags.
1335 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1336 parseDynamicFlags dflags args = do
1337 let ((leftover,errs),dflags')
1338 = runCmdLine (processArgs dynamic_flags args) dflags
1339 when (not (null errs)) $ do
1340 throwDyn (UsageError (unlines errs))
1341 return (dflags', leftover)
1344 type DynP = CmdLineP DynFlags
1346 upd :: (DynFlags -> DynFlags) -> DynP ()
1348 dfs <- getCmdLineState
1349 putCmdLineState $! (f dfs)
1351 --------------------------
1352 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1353 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1355 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1356 -- When you set f, set the ones it implies
1357 -- When you un-set f, however, we don't un-set the things it implies
1358 -- (except for -fno-glasgow-exts, which is treated specially)
1360 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1362 --------------------------
1363 setDumpFlag :: DynFlag -> OptKind DynP
1364 setDumpFlag dump_flag
1365 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1366 -- Whenver we -ddump, switch off the recompilation checker,
1367 -- else you don't see the dump!
1369 setVerbosity :: Maybe Int -> DynP ()
1370 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1372 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1374 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1377 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1379 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1381 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1384 | Nothing <- unpackPackageId pid
1385 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1387 = \s -> s{ thisPackage = pid }
1389 pid = stringToPackageId p
1391 -- If we're linking a binary, then only targets that produce object
1392 -- code are allowed (requests for other target types are ignored).
1393 setTarget l = upd set
1396 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1399 -- Changes the target only if we're compiling object code. This is
1400 -- used by -fasm and -fvia-C, which switch from one to the other, but
1401 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1402 -- can be safely used in an OPTIONS_GHC pragma.
1403 setObjTarget l = upd set
1406 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1409 setOptLevel :: Int -> DynFlags -> DynFlags
1410 setOptLevel n dflags
1411 | hscTarget dflags == HscInterpreted && n > 0
1413 -- not in IO any more, oh well:
1414 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1416 = updOptLevel n dflags
1419 setMainIs :: String -> DynP ()
1421 | not (null main_fn) -- The arg looked like "Foo.baz"
1422 = upd $ \d -> d{ mainFunIs = Just main_fn,
1423 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1425 | isUpper (head main_mod) -- The arg looked like "Foo"
1426 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1428 | otherwise -- The arg looked like "baz"
1429 = upd $ \d -> d{ mainFunIs = Just main_mod }
1431 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1433 -----------------------------------------------------------------------------
1434 -- Paths & Libraries
1436 -- -i on its own deletes the import paths
1437 addImportPath "" = upd (\s -> s{importPaths = []})
1438 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1442 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1445 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1447 addFrameworkPath p =
1448 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1450 split_marker = ':' -- not configurable (ToDo)
1452 splitPathList :: String -> [String]
1453 splitPathList s = filter notNull (splitUp s)
1454 -- empty paths are ignored: there might be a trailing
1455 -- ':' in the initial list, for example. Empty paths can
1456 -- cause confusion when they are translated into -I options
1457 -- for passing to gcc.
1459 #ifndef mingw32_TARGET_OS
1460 splitUp xs = split split_marker xs
1462 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1464 -- That is, if "foo:bar:baz" is used, this interpreted as
1465 -- consisting of three entries, 'foo', 'bar', 'baz'.
1466 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1467 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1469 -- Notice that no attempt is made to fully replace the 'standard'
1470 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1471 -- that this will cause too much breakage for users & ':' will
1472 -- work fine even with DOS paths, if you're not insisting on being silly.
1475 splitUp (x:':':div:xs) | div `elem` dir_markers
1476 = ((x:':':div:p): splitUp rs)
1478 (p,rs) = findNextPath xs
1479 -- we used to check for existence of the path here, but that
1480 -- required the IO monad to be threaded through the command-line
1481 -- parser which is quite inconvenient. The
1482 splitUp xs = cons p (splitUp rs)
1484 (p,rs) = findNextPath xs
1489 -- will be called either when we've consumed nought or the
1490 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1491 -- finding the next split marker.
1493 case break (`elem` split_markers) xs of
1494 (p, d:ds) -> (p, ds)
1497 split_markers :: [Char]
1498 split_markers = [':', ';']
1500 dir_markers :: [Char]
1501 dir_markers = ['/', '\\']
1504 -- -----------------------------------------------------------------------------
1505 -- tmpDir, where we store temporary files.
1507 setTmpDir :: FilePath -> DynFlags -> DynFlags
1508 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1510 #if !defined(mingw32_HOST_OS)
1511 canonicalise p = normalisePath p
1513 -- Canonicalisation of temp path under win32 is a bit more
1514 -- involved: (a) strip trailing slash,
1515 -- (b) normalise slashes
1516 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1518 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1520 -- if we're operating under cygwin, and TMP/TEMP is of
1521 -- the form "/cygdrive/drive/path", translate this to
1522 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1523 -- understand /cygdrive paths.)
1525 | "/cygdrive/" `isPrefixOf` path =
1526 case drop (length "/cygdrive/") path of
1527 drive:xs@('/':_) -> drive:':':xs
1531 -- strip the trailing backslash (awful, but we only do this once).
1532 removeTrailingSlash path =
1539 -----------------------------------------------------------------------------
1542 setOptHpcDir :: String -> DynP ()
1543 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1545 -----------------------------------------------------------------------------
1546 -- Via-C compilation stuff
1548 -- There are some options that we need to pass to gcc when compiling
1549 -- Haskell code via C, but are only supported by recent versions of
1550 -- gcc. The configure script decides which of these options we need,
1551 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1552 -- read before each via-C compilation. The advantage of having these
1553 -- in a separate file is that the file can be created at install-time
1554 -- depending on the available gcc version, and even re-generated later
1555 -- if gcc is upgraded.
1557 -- The options below are not dependent on the version of gcc, only the
1560 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1561 [String]) -- for registerised HC compilations
1562 machdepCCOpts dflags
1563 #if alpha_TARGET_ARCH
1565 #ifdef HAVE_THREADED_RTS_SUPPORT
1569 -- For now, to suppress the gcc warning "call-clobbered
1570 -- register used for global register variable", we simply
1571 -- disable all warnings altogether using the -w flag. Oh well.
1573 #elif hppa_TARGET_ARCH
1574 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1575 -- (very nice, but too bad the HP /usr/include files don't agree.)
1576 = ( ["-D_HPUX_SOURCE"], [] )
1578 #elif m68k_TARGET_ARCH
1579 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1580 -- popping of args to routines to be explicit; if we let things
1581 -- be deferred 'til after an STGJUMP, imminent death is certain!
1583 -- -fomit-frame-pointer : *don't*
1584 -- It's better to have a6 completely tied up being a frame pointer
1585 -- rather than let GCC pick random things to do with it.
1586 -- (If we want to steal a6, then we would try to do things
1587 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1588 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1590 #elif i386_TARGET_ARCH
1591 -- -fno-defer-pop : basically the same game as for m68k
1593 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1594 -- the fp (%ebp) for our register maps.
1595 = let n_regs = stolen_x86_regs dflags
1598 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1599 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1602 "-fomit-frame-pointer",
1603 -- we want -fno-builtin, because when gcc inlines
1604 -- built-in functions like memcpy() it tends to
1605 -- run out of registers, requiring -monly-n-regs
1607 "-DSTOLEN_X86_REGS="++show n_regs ]
1610 #elif ia64_TARGET_ARCH
1611 = ( [], ["-fomit-frame-pointer", "-G0"] )
1613 #elif x86_64_TARGET_ARCH
1614 = ( [], ["-fomit-frame-pointer",
1615 "-fno-asynchronous-unwind-tables",
1616 -- the unwind tables are unnecessary for HC code,
1617 -- and get in the way of -split-objs. Another option
1618 -- would be to throw them away in the mangler, but this
1621 -- calling builtins like strlen() using the FFI can
1622 -- cause gcc to run out of regs, so use the external
1626 #elif sparc_TARGET_ARCH
1628 -- For now, to suppress the gcc warning "call-clobbered
1629 -- register used for global register variable", we simply
1630 -- disable all warnings altogether using the -w flag. Oh well.
1632 #elif powerpc_apple_darwin_TARGET
1634 -- Disable Apple's precompiling preprocessor. It's a great thing
1635 -- for "normal" programs, but it doesn't support register variable
1637 = ( [], ["-no-cpp-precomp"] )
1642 picCCOpts :: DynFlags -> [String]
1644 #if darwin_TARGET_OS
1645 -- Apple prefers to do things the other way round.
1646 -- PIC is on by default.
1647 -- -mdynamic-no-pic:
1648 -- Turn off PIC code generation.
1650 -- Don't generate "common" symbols - these are unwanted
1651 -- in dynamic libraries.
1654 = ["-fno-common", "-D__PIC__"]
1656 = ["-mdynamic-no-pic"]
1657 #elif mingw32_TARGET_OS
1658 -- no -fPIC for Windows
1665 = ["-fPIC", "-D__PIC__"]
1670 -- -----------------------------------------------------------------------------
1674 can_split = cSplitObjs == "YES"
1676 -- -----------------------------------------------------------------------------
1679 compilerInfo :: [(String, String)]
1680 compilerInfo = [("Project name", cProjectName),
1681 ("Project version", cProjectVersion),
1682 ("Booter version", cBooterVersion),
1684 ("Interface file version", cHscIfaceFileVersion),
1685 ("Object splitting", cSplitObjs),
1686 ("Have native code generator", cGhcWithNativeCodeGen),
1687 ("Unregisterised", cGhcUnregisterised),
1688 ("Tables next to code", cGhcEnableTablesNextToCode),
1689 ("Win32 DLLs", cEnableWin32DLLs),
1690 ("Leading underscore", cLeadingUnderscore)]