2 -----------------------------------------------------------------------------
6 -- Most flags are dynamic flags, which means they can change from
7 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
8 -- multi-session GHC each session can be using different dynamic
9 -- flags. Dynamic flags can also be set at the prompt in GHCi.
11 -- (c) The University of Glasgow 2005
13 -----------------------------------------------------------------------------
19 HscTarget(..), isObjectTarget, defaultObjectTarget,
20 GhcMode(..), isOneShot,
21 GhcLink(..), isNoLink,
27 -- Configuration of the core-to-core and stg-to-stg phases
31 SimplifierMode(..), FloatOutSwitches(..),
32 getCoreToDo, getStgToDo,
34 -- Manipulating DynFlags
35 defaultDynFlags, -- DynFlags
36 initDynFlags, -- DynFlags -> IO DynFlags
38 dopt, -- DynFlag -> DynFlags -> Bool
39 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
40 getOpts, -- (DynFlags -> [a]) -> IO [a]
51 machdepCCOpts, picCCOpts,
52 supportedLanguages, languageOptions,
56 #include "HsVersions.h"
60 import PrelNames ( mAIN )
61 #ifdef i386_TARGET_ARCH
62 import StaticFlags ( opt_Static )
64 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
66 import {-# SOURCE #-} Packages (PackageState)
67 import DriverPhases ( Phase(..), phaseInputExt )
70 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
71 import Panic ( panic, GhcException(..) )
72 import UniqFM ( UniqFM )
74 import Maybes ( orElse )
75 import SrcLoc ( SrcSpan )
77 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
79 import Data.IORef ( readIORef )
80 import Control.Exception ( throwDyn )
81 import Control.Monad ( when )
84 import System.FilePath
85 import System.IO ( hPutStrLn, stderr )
87 -- -----------------------------------------------------------------------------
95 | Opt_D_dump_cmmz_pretty
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
118 | Opt_D_dump_simpl_phases
127 | Opt_D_dump_worker_wrapper
128 | Opt_D_dump_rn_trace
129 | Opt_D_dump_rn_stats
131 | Opt_D_dump_simpl_stats
132 | Opt_D_dump_tc_trace
133 | Opt_D_dump_if_trace
139 | Opt_D_verbose_core2core
140 | Opt_D_verbose_stg2stg
142 | Opt_D_dump_hi_diffs
143 | Opt_D_dump_minimal_imports
144 | Opt_D_dump_mod_cycles
145 | Opt_D_dump_view_pattern_commoning
146 | Opt_D_faststring_stats
147 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
148 | Opt_D_no_debug_output
154 | Opt_WarnIsError -- -Werror; makes warnings fatal
155 | Opt_WarnDuplicateExports
157 | Opt_WarnImplicitPrelude
158 | Opt_WarnIncompletePatterns
159 | Opt_WarnIncompletePatternsRecUpd
160 | Opt_WarnMissingFields
161 | Opt_WarnMissingMethods
162 | Opt_WarnMissingSigs
163 | Opt_WarnNameShadowing
164 | Opt_WarnOverlappingPatterns
165 | Opt_WarnSimplePatterns
166 | Opt_WarnTypeDefaults
167 | Opt_WarnMonomorphism
168 | Opt_WarnUnusedBinds
169 | Opt_WarnUnusedImports
170 | Opt_WarnUnusedMatches
171 | Opt_WarnDeprecations
172 | Opt_WarnDeprecatedFlags
173 | Opt_WarnDodgyImports
178 | Opt_OverlappingInstances
179 | Opt_UndecidableInstances
180 | Opt_IncoherentInstances
181 | Opt_MonomorphismRestriction
183 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
184 | Opt_ForeignFunctionInterface
185 | Opt_UnliftedFFITypes
186 | Opt_PArr -- Syntactic support for parallel arrays
187 | Opt_Arrows -- Arrow-notation syntax
188 | Opt_TemplateHaskell
192 | Opt_ImplicitPrelude
193 | Opt_ScopedTypeVariables
197 | Opt_OverloadedStrings
198 | Opt_DisambiguateRecordFields
199 | Opt_RecordWildCards
204 | Opt_StandaloneDeriving
205 | Opt_DeriveDataTypeable
206 | Opt_TypeSynonymInstances
207 | Opt_FlexibleContexts
208 | Opt_FlexibleInstances
209 | Opt_ConstrainedClassMethods
210 | Opt_MultiParamTypeClasses
211 | Opt_FunctionalDependencies
213 | Opt_PolymorphicComponents
214 | Opt_ExistentialQuantification
218 | Opt_PatternSignatures
219 | Opt_ParallelListComp
220 | Opt_TransformListComp
221 | Opt_GeneralizedNewtypeDeriving
224 | Opt_LiberalTypeSynonyms
227 | Opt_ImpredicativeTypes
230 | Opt_PrintExplicitForalls
235 | Opt_StaticArgumentTransformation
239 | Opt_IgnoreInterfacePragmas
240 | Opt_OmitInterfacePragmas
241 | Opt_DoLambdaEtaExpansion
245 | Opt_UnboxStrictFields
250 | Opt_RegsGraph -- do graph coloring register allocation
251 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
259 | Opt_ExcessPrecision
260 | Opt_ReadUserPackageConf
264 | Opt_HideAllPackages
265 | Opt_PrintBindResult
269 | Opt_BreakOnException
271 | Opt_PrintEvldWithShow
272 | Opt_PrintBindContents
276 | Opt_ConvertToZipCfgAndBack
287 data DynFlags = DynFlags {
290 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
291 stgToDo :: Maybe [StgToDo], -- similarly
292 hscTarget :: HscTarget,
293 hscOutName :: String, -- name of the output file
294 extCoreName :: String, -- name of the .core output file
295 verbosity :: Int, -- verbosity level
296 optLevel :: Int, -- optimisation level
297 simplPhases :: Int, -- number of simplifier phases
298 maxSimplIterations :: Int, -- max simplifier iterations
299 shouldDumpSimplPhase :: SimplifierMode -> Bool,
300 ruleCheck :: Maybe String,
302 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
303 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
304 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
306 stolen_x86_regs :: Int,
307 cmdlineHcIncludes :: [String], -- -#includes
308 importPaths :: [FilePath],
310 mainFunIs :: Maybe String,
311 ctxtStkDepth :: Int, -- Typechecker context stack depth
313 thisPackage :: PackageId,
316 wayNames :: [WayName], -- way flags from the cmd line
317 buildTag :: String, -- the global "way" (eg. "p" for prof)
318 rtsBuildTag :: String, -- the RTS "way"
321 objectDir :: Maybe String,
322 hiDir :: Maybe String,
323 stubDir :: Maybe String,
329 outputFile :: Maybe String,
330 outputHi :: Maybe String,
331 dynLibLoader :: DynLibLoader,
333 -- | This is set by DriverPipeline.runPipeline based on where
334 -- its output is going.
335 dumpPrefix :: Maybe FilePath,
337 -- | Override the dumpPrefix set by runPipeline.
338 -- Set by -ddump-file-prefix
339 dumpPrefixForce :: Maybe FilePath,
341 includePaths :: [String],
342 libraryPaths :: [String],
343 frameworkPaths :: [String], -- used on darwin only
344 cmdlineFrameworks :: [String], -- ditto
345 tmpDir :: String, -- no trailing '/'
347 ghcUsagePath :: FilePath, -- Filled in by SysTools
348 ghciUsagePath :: FilePath, -- ditto
350 hpcDir :: String, -- ^ path to store the .mix files
352 -- options for particular phases
361 opt_windres :: [String],
363 -- commands for particular phases
365 pgm_P :: (String,[Option]),
367 pgm_c :: (String,[Option]),
368 pgm_m :: (String,[Option]),
369 pgm_s :: (String,[Option]),
370 pgm_a :: (String,[Option]),
371 pgm_l :: (String,[Option]),
372 pgm_dll :: (String,[Option]),
374 pgm_sysman :: String,
375 pgm_windres :: String,
378 extraPkgConfs :: [FilePath],
379 topDir :: FilePath, -- filled in by SysTools
380 systemPackageConfig :: FilePath, -- ditto
381 -- The -package-conf flags given on the command line, in the order
384 packageFlags :: [PackageFlag],
385 -- The -package and -hide-package flags from the command-line
388 -- NB. do not modify this field, it is calculated by
389 -- Packages.initPackages and Packages.updatePackages.
390 pkgDatabase :: Maybe (UniqFM PackageConfig),
391 pkgState :: PackageState,
397 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
399 haddockOptions :: Maybe String
410 -- | will this target result in an object file on the disk?
411 isObjectTarget :: HscTarget -> Bool
412 isObjectTarget HscC = True
413 isObjectTarget HscAsm = True
414 isObjectTarget _ = False
416 -- | The 'GhcMode' tells us whether we're doing multi-module
417 -- compilation (controlled via the "GHC" API) or one-shot
418 -- (single-module) compilation. This makes a difference primarily to
419 -- the "Finder": in one-shot mode we look for interface files for
420 -- imported modules, but in multi-module mode we look for source files
421 -- in order to check whether they need to be recompiled.
423 = CompManager -- ^ --make, GHCi, etc.
424 | OneShot -- ^ ghc -c Foo.hs
425 | MkDepend -- ^ ghc -M, see Finder for why we need this
428 isOneShot :: GhcMode -> Bool
429 isOneShot OneShot = True
430 isOneShot _other = False
432 -- | What kind of linking to do.
433 data GhcLink -- What to do in the link step, if there is one
434 = NoLink -- Don't link at all
435 | LinkBinary -- Link object code into a binary
436 | LinkInMemory -- Use the in-memory dynamic linker
437 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
440 isNoLink :: GhcLink -> Bool
441 isNoLink NoLink = True
445 = ExposePackage String
447 | IgnorePackage String
450 defaultHscTarget :: HscTarget
451 defaultHscTarget = defaultObjectTarget
453 -- | the 'HscTarget' value corresponding to the default way to create
454 -- object files on the current platform.
455 defaultObjectTarget :: HscTarget
457 | cGhcWithNativeCodeGen == "YES" = HscAsm
462 | Wrapped (Maybe String)
466 initDynFlags :: DynFlags -> IO DynFlags
467 initDynFlags dflags = do
468 -- someday these will be dynamic flags
469 ways <- readIORef v_Ways
470 build_tag <- readIORef v_Build_tag
471 rts_build_tag <- readIORef v_RTS_Build_tag
474 buildTag = build_tag,
475 rtsBuildTag = rts_build_tag
478 defaultDynFlags :: DynFlags
481 ghcMode = CompManager,
482 ghcLink = LinkBinary,
485 hscTarget = defaultHscTarget,
491 maxSimplIterations = 4,
492 shouldDumpSimplPhase = const False,
494 specConstrThreshold = Just 200,
495 specConstrCount = Just 3,
496 liberateCaseThreshold = Just 200,
498 cmdlineHcIncludes = [],
502 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
504 thisPackage = mainPackageId,
510 objectSuf = phaseInputExt StopLn,
511 hcSuf = phaseInputExt HCc,
514 outputFile = Nothing,
516 dynLibLoader = Deployable,
517 dumpPrefix = Nothing,
518 dumpPrefixForce = Nothing,
522 cmdlineFrameworks = [],
523 tmpDir = cDEFAULT_TMPDIR,
541 pkgDatabase = Nothing,
542 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
543 wayNames = panic "defaultDynFlags: No wayNames",
544 buildTag = panic "defaultDynFlags: No buildTag",
545 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
546 -- initSysTools fills all these in
547 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
548 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
549 topDir = panic "defaultDynFlags: No topDir",
550 systemPackageConfig = panic "defaultDynFlags: No systemPackageConfig",
551 pgm_L = panic "defaultDynFlags: No pgm_L",
552 pgm_P = panic "defaultDynFlags: No pgm_P",
553 pgm_F = panic "defaultDynFlags: No pgm_F",
554 pgm_c = panic "defaultDynFlags: No pgm_c",
555 pgm_m = panic "defaultDynFlags: No pgm_m",
556 pgm_s = panic "defaultDynFlags: No pgm_s",
557 pgm_a = panic "defaultDynFlags: No pgm_a",
558 pgm_l = panic "defaultDynFlags: No pgm_l",
559 pgm_dll = panic "defaultDynFlags: No pgm_dll",
560 pgm_T = panic "defaultDynFlags: No pgm_T",
561 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
562 pgm_windres = panic "defaultDynFlags: No pgm_windres",
563 -- end of initSysTools values
564 haddockOptions = Nothing,
566 Opt_ReadUserPackageConf,
568 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
569 -- behaviour the default, to see if anyone notices
573 Opt_MonomorphismRestriction,
581 Opt_PrintBindContents
583 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
584 -- The default -O0 options
587 log_action = \severity srcSpan style msg ->
589 SevInfo -> hPutStrLn stderr (show (msg style))
590 SevFatal -> hPutStrLn stderr (show (msg style))
591 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
597 0 | print errors & warnings only
598 1 | minimal verbosity: print "compiling M ... done." for each module.
599 2 | equivalent to -dshow-passes
600 3 | equivalent to existing "ghc -v"
601 4 | "ghc -v -ddump-most"
602 5 | "ghc -v -ddump-all"
605 dopt :: DynFlag -> DynFlags -> Bool
606 dopt f dflags = f `elem` (flags dflags)
608 dopt_set :: DynFlags -> DynFlag -> DynFlags
609 dopt_set dfs f = dfs{ flags = f : flags dfs }
611 dopt_unset :: DynFlags -> DynFlag -> DynFlags
612 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
614 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
615 getOpts dflags opts = reverse (opts dflags)
616 -- We add to the options from the front, so we need to reverse the list
618 getVerbFlag :: DynFlags -> String
620 | verbosity dflags >= 3 = "-v"
623 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
624 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
625 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
626 addCmdlineFramework, addHaddockOpts
627 :: String -> DynFlags -> DynFlags
628 setOutputFile, setOutputHi, setDumpPrefixForce
629 :: Maybe String -> DynFlags -> DynFlags
631 setObjectDir f d = d{ objectDir = Just f}
632 setHiDir f d = d{ hiDir = Just f}
633 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
634 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
635 -- #included from the .hc file when compiling with -fvia-C.
637 setObjectSuf f d = d{ objectSuf = f}
638 setHiSuf f d = d{ hiSuf = f}
639 setHcSuf f d = d{ hcSuf = f}
641 setOutputFile f d = d{ outputFile = f}
642 setOutputHi f d = d{ outputHi = f}
644 parseDynLibLoaderMode f d =
646 ("deploy", "") -> d{ dynLibLoader = Deployable }
647 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
648 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
649 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
650 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
651 (_,_) -> error "Unknown dynlib loader"
653 setDumpPrefixForce f d = d { dumpPrefixForce = f}
655 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
656 -- Config.hs should really use Option.
657 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
659 setPgmL f d = d{ pgm_L = f}
660 setPgmF f d = d{ pgm_F = f}
661 setPgmc f d = d{ pgm_c = (f,[])}
662 setPgmm f d = d{ pgm_m = (f,[])}
663 setPgms f d = d{ pgm_s = (f,[])}
664 setPgma f d = d{ pgm_a = (f,[])}
665 setPgml f d = d{ pgm_l = (f,[])}
666 setPgmdll f d = d{ pgm_dll = (f,[])}
667 setPgmwindres f d = d{ pgm_windres = f}
669 addOptL f d = d{ opt_L = f : opt_L d}
670 addOptP f d = d{ opt_P = f : opt_P d}
671 addOptF f d = d{ opt_F = f : opt_F d}
672 addOptc f d = d{ opt_c = f : opt_c d}
673 addOptm f d = d{ opt_m = f : opt_m d}
674 addOpta f d = d{ opt_a = f : opt_a d}
675 addOptl f d = d{ opt_l = f : opt_l d}
676 addOptdep f d = d{ opt_dep = f : opt_dep d}
677 addOptwindres f d = d{ opt_windres = f : opt_windres d}
679 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
681 addHaddockOpts f d = d{ haddockOptions = Just f}
683 -- -----------------------------------------------------------------------------
684 -- Command-line options
686 -- When invoking external tools as part of the compilation pipeline, we
687 -- pass these a sequence of options on the command-line. Rather than
688 -- just using a list of Strings, we use a type that allows us to distinguish
689 -- between filepaths and 'other stuff'. [The reason being, of course, that
690 -- this type gives us a handle on transforming filenames, and filenames only,
691 -- to whatever format they're expected to be on a particular platform.]
694 = FileOption -- an entry that _contains_ filename(s) / filepaths.
695 String -- a non-filepath prefix that shouldn't be
696 -- transformed (e.g., "/out=")
697 String -- the filepath/filename portion
700 -----------------------------------------------------------------------------
701 -- Setting the optimisation level
703 updOptLevel :: Int -> DynFlags -> DynFlags
704 -- Set dynflags appropriate to the optimisation level
706 = dfs2{ optLevel = final_n }
708 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
709 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
710 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
712 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
713 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
715 optLevelFlags :: [([Int], DynFlag)]
717 = [ ([0], Opt_IgnoreInterfacePragmas)
718 , ([0], Opt_OmitInterfacePragmas)
720 , ([1,2], Opt_IgnoreAsserts)
721 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
723 , ([1,2], Opt_DoEtaReduction)
724 , ([1,2], Opt_CaseMerge)
725 , ([1,2], Opt_Strictness)
727 , ([1,2], Opt_FullLaziness)
729 , ([2], Opt_LiberateCase)
730 , ([2], Opt_SpecConstr)
731 , ([2], Opt_StaticArgumentTransformation)
733 , ([0,1,2], Opt_DoLambdaEtaExpansion)
734 -- This one is important for a tiresome reason:
735 -- we want to make sure that the bindings for data
736 -- constructors are eta-expanded. This is probably
737 -- a good thing anyway, but it seems fragile.
740 -- -----------------------------------------------------------------------------
741 -- Standard sets of warning options
743 standardWarnings :: [DynFlag]
745 = [ Opt_WarnDeprecations,
746 Opt_WarnDeprecatedFlags,
747 Opt_WarnOverlappingPatterns,
748 Opt_WarnMissingFields,
749 Opt_WarnMissingMethods,
750 Opt_WarnDuplicateExports
753 minusWOpts :: [DynFlag]
755 = standardWarnings ++
756 [ Opt_WarnUnusedBinds,
757 Opt_WarnUnusedMatches,
758 Opt_WarnUnusedImports,
759 Opt_WarnIncompletePatterns,
763 minusWallOpts :: [DynFlag]
766 [ Opt_WarnTypeDefaults,
767 Opt_WarnNameShadowing,
773 -- minuswRemovesOpts should be every warning option
774 minuswRemovesOpts :: [DynFlag]
777 [Opt_WarnImplicitPrelude,
778 Opt_WarnIncompletePatternsRecUpd,
779 Opt_WarnSimplePatterns,
780 Opt_WarnMonomorphism,
784 -- -----------------------------------------------------------------------------
785 -- CoreToDo: abstraction of core-to-core passes to run.
787 data CoreToDo -- These are diff core-to-core passes,
788 -- which may be invoked in any order,
789 -- as many times as you like.
791 = CoreDoSimplify -- The core-to-core simplifier.
794 -- Each run of the simplifier can take a different
795 -- set of simplifier-specific flags.
797 | CoreDoFloatOutwards FloatOutSwitches
802 | CoreDoWorkerWrapper
805 | CoreDoOldStrictness
808 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
809 -- matching this string
810 | CoreDoVectorisation
811 | CoreDoNothing -- Useful when building up
812 | CoreDoPasses [CoreToDo] -- lists of these things
814 data SimplifierMode -- See comments in SimplMonad
816 | SimplPhase Int [String]
818 data SimplifierSwitch
819 = MaxSimplifierIterations Int
822 data FloatOutSwitches
823 = FloatOutSw Bool -- True <=> float lambdas to top level
824 Bool -- True <=> float constants to top level,
825 -- even if they do not escape a lambda
828 -- The core-to-core pass ordering is derived from the DynFlags:
829 runWhen :: Bool -> CoreToDo -> CoreToDo
830 runWhen True do_this = do_this
831 runWhen False _ = CoreDoNothing
833 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
834 runMaybe (Just x) f = f x
835 runMaybe Nothing _ = CoreDoNothing
837 getCoreToDo :: DynFlags -> [CoreToDo]
839 | Just todo <- coreToDo dflags = todo -- set explicitly by user
840 | otherwise = core_todo
842 opt_level = optLevel dflags
843 phases = simplPhases dflags
844 max_iter = maxSimplIterations dflags
845 strictness = dopt Opt_Strictness dflags
846 full_laziness = dopt Opt_FullLaziness dflags
847 cse = dopt Opt_CSE dflags
848 spec_constr = dopt Opt_SpecConstr dflags
849 liberate_case = dopt Opt_LiberateCase dflags
850 rule_check = ruleCheck dflags
851 vectorisation = dopt Opt_Vectorise dflags
852 -- static_args = dopt Opt_StaticArgumentTransformation dflags
854 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
856 simpl_phase phase names iter
858 [ CoreDoSimplify (SimplPhase phase names) [
859 MaxSimplifierIterations iter
861 maybe_rule_check phase
864 -- By default, we have 2 phases before phase 0.
866 -- Want to run with inline phase 2 after the specialiser to give
867 -- maximum chance for fusion to work before we inline build/augment
868 -- in phase 1. This made a difference in 'ansi' where an
869 -- overloaded function wasn't inlined till too late.
871 -- Need phase 1 so that build/augment get
872 -- inlined. I found that spectral/hartel/genfft lost some useful
873 -- strictness in the function sumcode' if augment is not inlined
874 -- before strictness analysis runs
875 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
876 | phase <- [phases, phases-1 .. 1] ]
879 -- initial simplify: mk specialiser happy: minimum effort please
880 simpl_gently = CoreDoSimplify SimplGently [
882 -- Don't inline anything till full laziness has bitten
883 -- In particular, inlining wrappers inhibits floating
884 -- e.g. ...(case f x of ...)...
885 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
886 -- ==> ...(case x of I# x# -> case fw x# of ...)...
887 -- and now the redex (f x) isn't floatable any more
888 -- Similarly, don't apply any rules until after full
889 -- laziness. Notably, list fusion can prevent floating.
891 NoCaseOfCase, -- Don't do case-of-case transformations.
892 -- This makes full laziness work better
893 MaxSimplifierIterations max_iter
897 if opt_level == 0 then
898 [runWhen vectorisation (CoreDoPasses [ simpl_gently, CoreDoVectorisation ]),
899 simpl_phase 0 ["final"] max_iter]
900 else {- opt_level >= 1 -} [
902 -- We want to do the static argument transform before full laziness as it
903 -- may expose extra opportunities to float things outwards. However, to fix
904 -- up the output of the transformation we need at do at least one simplify
905 -- after this before anything else
906 -- runWhen static_args CoreDoStaticArgs,
907 -- XXX disabled, see #2321
909 -- initial simplify: mk specialiser happy: minimum effort please
912 -- We run vectorisation here for now, but we might also try to run
914 runWhen vectorisation (CoreDoPasses [ CoreDoVectorisation, simpl_gently ]),
916 -- Specialisation is best done before full laziness
917 -- so that overloaded functions have all their dictionary lambdas manifest
920 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
926 -- Phase 0: allow all Ids to be inlined now
927 -- This gets foldr inlined before strictness analysis
929 -- At least 3 iterations because otherwise we land up with
930 -- huge dead expressions because of an infelicity in the
932 -- let k = BIG in foldr k z xs
933 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
934 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
936 simpl_phase 0 ["main"] (max max_iter 3),
939 #ifdef OLD_STRICTNESS
942 runWhen strictness (CoreDoPasses [
946 simpl_phase 0 ["post-worker-wrapper"] max_iter
949 runWhen full_laziness
950 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
951 True)), -- Float constants
952 -- nofib/spectral/hartel/wang doubles in speed if you
953 -- do full laziness late in the day. It only happens
954 -- after fusion and other stuff, so the early pass doesn't
955 -- catch it. For the record, the redex is
956 -- f_el22 (f_el21 r_midblock)
960 -- We want CSE to follow the final full-laziness pass, because it may
961 -- succeed in commoning up things floated out by full laziness.
962 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
968 -- Case-liberation for -O2. This should be after
969 -- strictness analysis and the simplification which follows it.
970 runWhen liberate_case (CoreDoPasses [
972 simpl_phase 0 ["post-liberate-case"] max_iter
973 ]), -- Run the simplifier after LiberateCase to vastly
974 -- reduce the possiblility of shadowing
975 -- Reason: see Note [Shadowing] in SpecConstr.lhs
977 runWhen spec_constr CoreDoSpecConstr,
981 -- Final clean-up simplification:
982 simpl_phase 0 ["final"] max_iter
985 -- -----------------------------------------------------------------------------
986 -- StgToDo: abstraction of stg-to-stg passes to run.
989 = StgDoMassageForProfiling -- should be (next to) last
990 -- There's also setStgVarInfo, but its absolute "lastness"
991 -- is so critical that it is hardwired in (no flag).
994 getStgToDo :: DynFlags -> [StgToDo]
996 | Just todo <- stgToDo dflags = todo -- set explicitly by user
999 stg_stats = dopt Opt_StgStats dflags
1001 todo1 = if stg_stats then [D_stg_stats] else []
1003 todo2 | WayProf `elem` wayNames dflags
1004 = StgDoMassageForProfiling : todo1
1008 -- -----------------------------------------------------------------------------
1011 allFlags :: [String]
1012 allFlags = map ('-':) $
1013 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1014 map ("fno-"++) flags ++
1015 map ("f"++) flags ++
1016 map ("X"++) supportedLanguages ++
1017 map ("XNo"++) supportedLanguages
1018 where ok (PrefixPred _ _) = False
1020 flags = [ name | (name, _, _) <- fFlags ]
1022 dynamic_flags :: [Flag DynP]
1024 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1025 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1026 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1027 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1028 , Flag "v" (OptIntSuffix setVerbosity) Supported
1030 ------- Specific phases --------------------------------------------
1031 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1032 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1033 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1034 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1035 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1036 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1037 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1038 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1039 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1040 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1042 , Flag "optL" (HasArg (upd . addOptL)) Supported
1043 , Flag "optP" (HasArg (upd . addOptP)) Supported
1044 , Flag "optF" (HasArg (upd . addOptF)) Supported
1045 , Flag "optc" (HasArg (upd . addOptc)) Supported
1046 , Flag "optm" (HasArg (upd . addOptm)) Supported
1047 , Flag "opta" (HasArg (upd . addOpta)) Supported
1048 , Flag "optl" (HasArg (upd . addOptl)) Supported
1049 , Flag "optdep" (HasArg (upd . addOptdep)) Supported
1050 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1053 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1056 -------- Linking ----------------------------------------------------
1057 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1059 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1060 (Deprecated "Use -c instead")
1061 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1063 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1066 ------- Libraries ---------------------------------------------------
1067 , Flag "L" (Prefix addLibraryPath ) Supported
1068 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1070 ------- Frameworks --------------------------------------------------
1071 -- -framework-path should really be -F ...
1072 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1073 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1075 ------- Output Redirection ------------------------------------------
1076 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1077 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1078 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1079 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1080 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1081 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1082 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1083 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1084 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1085 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1088 ------- Keeping temporary files -------------------------------------
1089 -- These can be singular (think ghc -c) or plural (think ghc --make)
1090 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1091 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1092 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1093 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1094 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1095 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1096 -- This only makes sense as plural
1097 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1099 ------- Miscellaneous ----------------------------------------------
1100 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1101 , Flag "main-is" (SepArg setMainIs ) Supported
1102 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1103 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1104 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1106 ------- recompilation checker --------------------------------------
1107 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1108 (Deprecated "Use -fno-force-recomp instead")
1109 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1110 (Deprecated "Use -fforce-recomp instead")
1112 ------- Packages ----------------------------------------------------
1113 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1114 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1116 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1117 , Flag "package" (HasArg exposePackage) Supported
1118 , Flag "hide-package" (HasArg hidePackage) Supported
1119 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1121 , Flag "ignore-package" (HasArg ignorePackage)
1123 , Flag "syslib" (HasArg exposePackage)
1124 (Deprecated "Use -package instead")
1126 ------ HsCpp opts ---------------------------------------------------
1127 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1128 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1130 ------- Include/Import Paths ----------------------------------------
1131 , Flag "I" (Prefix addIncludePath) Supported
1132 , Flag "i" (OptPrefix addImportPath ) Supported
1134 ------ Debugging ----------------------------------------------------
1135 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1137 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1139 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1141 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1143 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1145 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1147 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1149 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1151 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1153 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1155 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1157 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1159 , Flag "ddump-asm-regalloc-stages"
1160 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1162 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1164 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1166 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1168 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1170 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1172 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1174 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1176 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1178 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1180 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1182 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1184 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1186 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1188 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1190 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1192 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1194 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1196 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1198 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1200 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1202 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1204 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1206 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1208 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1210 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1212 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1214 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1216 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1218 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1220 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1222 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1224 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1226 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1228 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1230 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1232 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1234 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1236 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1238 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1240 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1242 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1244 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1247 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1249 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1251 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1253 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1255 , Flag "dshow-passes"
1256 (NoArg (do setDynFlag Opt_ForceRecomp
1257 setVerbosity (Just 2)))
1259 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1262 ------ Machine dependant (-m<blah>) stuff ---------------------------
1264 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1266 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1268 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1271 ------ Warning opts -------------------------------------------------
1272 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1274 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1276 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1278 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1280 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1281 (Deprecated "Use -w instead")
1282 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1285 ------ Optimisation flags ------------------------------------------
1286 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1287 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1288 (Deprecated "Use -O0 instead")
1289 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1290 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1292 -- If the number is missing, use 1
1294 , Flag "fsimplifier-phases"
1295 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1297 , Flag "fmax-simplifier-iterations"
1298 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1301 , Flag "fspec-constr-threshold"
1302 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1304 , Flag "fno-spec-constr-threshold"
1305 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1307 , Flag "fspec-constr-count"
1308 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1310 , Flag "fno-spec-constr-count"
1311 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1313 , Flag "fliberate-case-threshold"
1314 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1316 , Flag "fno-liberate-case-threshold"
1317 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1320 , Flag "frule-check"
1321 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1323 , Flag "fcontext-stack"
1324 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1327 ------ Compiler flags -----------------------------------------------
1329 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1330 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1331 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1333 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1334 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1335 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1337 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1339 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1342 ++ map (mkFlag True "f" setDynFlag ) fFlags
1343 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1344 ++ map (mkFlag True "X" setDynFlag ) xFlags
1345 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1347 mkFlag :: Bool -- True => turn it on, False => turn it off
1349 -> (DynFlag -> DynP ())
1350 -> (String, DynFlag, Bool -> Deprecated)
1352 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1353 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1355 deprecatedForLanguage :: String -> Bool -> Deprecated
1356 deprecatedForLanguage lang turnOn =
1357 Deprecated ("Use the " ++ prefix ++ lang ++ " language instead")
1358 where prefix = if turnOn then "" else "No"
1360 -- these -f<blah> flags can all be reversed with -fno-<blah>
1362 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1364 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1365 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1366 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1367 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1368 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1369 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1370 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1371 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1372 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1373 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1374 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1375 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1376 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1377 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1378 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1379 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1380 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1381 ( "warn-deprecations", Opt_WarnDeprecations, const Supported ),
1382 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1383 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1384 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1385 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1386 ( "strictness", Opt_Strictness, const Supported ),
1387 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1388 ( "full-laziness", Opt_FullLaziness, const Supported ),
1389 ( "liberate-case", Opt_LiberateCase, const Supported ),
1390 ( "spec-constr", Opt_SpecConstr, const Supported ),
1391 ( "cse", Opt_CSE, const Supported ),
1392 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1393 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1394 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1395 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1396 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1397 ( "case-merge", Opt_CaseMerge, const Supported ),
1398 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1399 ( "method-sharing", Opt_MethodSharing, const Supported ),
1400 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1401 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1402 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1403 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1404 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1405 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1406 ( "rewrite-rules", Opt_RewriteRules, const Supported ),
1407 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1408 ( "break-on-error", Opt_BreakOnError, const Supported ),
1409 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1410 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1411 ( "run-cps", Opt_RunCPSZ, const Supported ),
1412 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1413 ( "vectorise", Opt_Vectorise, const Supported ),
1414 ( "regs-graph", Opt_RegsGraph, const Supported ),
1415 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1416 ( "th", Opt_TemplateHaskell,
1417 deprecatedForLanguage "TemplateHaskell" ),
1418 ( "fi", Opt_ForeignFunctionInterface,
1419 deprecatedForLanguage "ForeignFunctionInterface" ),
1420 ( "ffi", Opt_ForeignFunctionInterface,
1421 deprecatedForLanguage "ForeignFunctionInterface" ),
1422 ( "arrows", Opt_Arrows,
1423 deprecatedForLanguage "Arrows" ),
1424 ( "generics", Opt_Generics,
1425 deprecatedForLanguage "Generics" ),
1426 ( "implicit-prelude", Opt_ImplicitPrelude,
1427 deprecatedForLanguage "ImplicitPrelude" ),
1428 ( "bang-patterns", Opt_BangPatterns,
1429 deprecatedForLanguage "BangPatterns" ),
1430 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1431 deprecatedForLanguage "MonomorphismRestriction" ),
1432 ( "mono-pat-binds", Opt_MonoPatBinds,
1433 deprecatedForLanguage "MonoPatBinds" ),
1434 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1435 deprecatedForLanguage "ExtendedDefaultRules" ),
1436 ( "implicit-params", Opt_ImplicitParams,
1437 deprecatedForLanguage "ImplicitParams" ),
1438 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1439 deprecatedForLanguage "ScopedTypeVariables" ),
1441 deprecatedForLanguage "PArr" ),
1442 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1443 deprecatedForLanguage "OverlappingInstances" ),
1444 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1445 deprecatedForLanguage "UndecidableInstances" ),
1446 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1447 deprecatedForLanguage "IncoherentInstances" ),
1448 ( "gen-manifest", Opt_GenManifest, const Supported ),
1449 ( "embed-manifest", Opt_EmbedManifest, const Supported )
1452 supportedLanguages :: [String]
1453 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1455 -- This may contain duplicates
1456 languageOptions :: [DynFlag]
1457 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1459 -- These -X<blah> flags can all be reversed with -XNo<blah>
1460 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1462 ( "CPP", Opt_Cpp, const Supported ),
1463 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1464 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1465 ( "MagicHash", Opt_MagicHash, const Supported ),
1466 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1467 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1468 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1469 ( "PatternSignatures", Opt_PatternSignatures, const Supported ),
1470 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1471 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1472 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1473 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1474 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1475 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1476 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1477 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1478 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1479 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1480 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1481 ( "Arrows", Opt_Arrows, const Supported ),
1482 ( "PArr", Opt_PArr, const Supported ),
1483 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1484 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1485 ( "Generics", Opt_Generics, const Supported ),
1487 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1488 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1489 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1490 ( "RecordPuns", Opt_RecordPuns,
1491 deprecatedForLanguage "NamedFieldPuns" ),
1492 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1493 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1494 ( "GADTs", Opt_GADTs, const Supported ),
1495 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1496 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1497 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1499 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1500 -- On by default (which is not strictly H98):
1501 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1502 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1503 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1504 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1505 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1506 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1507 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1508 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1509 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1510 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1511 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1512 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1513 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1514 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1515 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1516 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1517 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1518 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported )
1521 impliedFlags :: [(DynFlag, [DynFlag])]
1523 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1524 -- be completely rigid for GADTs
1525 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1526 -- Note [Scoped tyvars] in TcBinds
1529 glasgowExtsFlags :: [DynFlag]
1530 glasgowExtsFlags = [
1531 Opt_PrintExplicitForalls
1532 , Opt_ForeignFunctionInterface
1533 , Opt_UnliftedFFITypes
1535 , Opt_ImplicitParams
1536 , Opt_ScopedTypeVariables
1538 , Opt_TypeSynonymInstances
1539 , Opt_StandaloneDeriving
1540 , Opt_DeriveDataTypeable
1541 , Opt_FlexibleContexts
1542 , Opt_FlexibleInstances
1543 , Opt_ConstrainedClassMethods
1544 , Opt_MultiParamTypeClasses
1545 , Opt_FunctionalDependencies
1547 , Opt_PolymorphicComponents
1548 , Opt_ExistentialQuantification
1551 , Opt_LiberalTypeSynonyms
1553 , Opt_ImpredicativeTypes
1556 , Opt_ParallelListComp
1557 , Opt_EmptyDataDecls
1558 , Opt_KindSignatures
1559 , Opt_PatternSignatures
1560 , Opt_GeneralizedNewtypeDeriving
1561 , Opt_TypeFamilies ]
1563 -- -----------------------------------------------------------------------------
1564 -- Parsing the dynamic flags.
1566 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags, [String], [String])
1567 parseDynamicFlags dflags args = do
1568 let ((leftover, errs, warns), dflags')
1569 = runCmdLine (processArgs dynamic_flags args) dflags
1570 when (not (null errs)) $ do
1571 throwDyn (UsageError (unlines errs))
1572 return (dflags', leftover, warns)
1574 type DynP = CmdLineP DynFlags
1576 upd :: (DynFlags -> DynFlags) -> DynP ()
1578 dfs <- getCmdLineState
1579 putCmdLineState $! (f dfs)
1581 --------------------------
1582 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1583 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1585 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1586 -- When you set f, set the ones it implies
1587 -- When you un-set f, however, we don't un-set the things it implies
1588 -- (except for -fno-glasgow-exts, which is treated specially)
1590 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1592 --------------------------
1593 setDumpFlag :: DynFlag -> OptKind DynP
1594 setDumpFlag dump_flag
1595 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1596 | otherwise = NoArg (setDynFlag dump_flag)
1598 -- Whenver we -ddump, switch off the recompilation checker,
1599 -- else you don't see the dump!
1600 -- However, certain dumpy-things are really interested in what's going
1601 -- on during recompilation checking, so in those cases we
1602 -- don't want to turn it off.
1603 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1604 Opt_D_dump_hi_diffs]
1606 setVerboseCore2Core :: DynP ()
1607 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1608 setDynFlag Opt_D_verbose_core2core
1609 upd (\s -> s { shouldDumpSimplPhase = const True })
1611 setDumpSimplPhases :: String -> DynP ()
1612 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1613 upd (\s -> s { shouldDumpSimplPhase = spec })
1615 spec :: SimplifierMode -> Bool
1617 . map (join (&&) . map match . split ':')
1623 join :: (Bool -> Bool -> Bool)
1624 -> [SimplifierMode -> Bool]
1625 -> SimplifierMode -> Bool
1626 join _ [] = const True
1627 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1629 match :: String -> SimplifierMode -> Bool
1630 match "" = const True
1631 match s = case reads s of
1632 [(n,"")] -> phase_num n
1635 phase_num :: Int -> SimplifierMode -> Bool
1636 phase_num n (SimplPhase k _) = n == k
1637 phase_num _ _ = False
1639 phase_name :: String -> SimplifierMode -> Bool
1640 phase_name s SimplGently = s == "gentle"
1641 phase_name s (SimplPhase _ ss) = s `elem` ss
1643 setVerbosity :: Maybe Int -> DynP ()
1644 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1646 addCmdlineHCInclude :: String -> DynP ()
1647 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1649 extraPkgConf_ :: FilePath -> DynP ()
1650 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1652 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1654 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1656 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1658 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1660 setPackageName :: String -> DynFlags -> DynFlags
1662 | Nothing <- unpackPackageId pid
1663 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1665 = \s -> s{ thisPackage = pid }
1667 pid = stringToPackageId p
1669 -- If we're linking a binary, then only targets that produce object
1670 -- code are allowed (requests for other target types are ignored).
1671 setTarget :: HscTarget -> DynP ()
1672 setTarget l = upd set
1675 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1678 -- Changes the target only if we're compiling object code. This is
1679 -- used by -fasm and -fvia-C, which switch from one to the other, but
1680 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1681 -- can be safely used in an OPTIONS_GHC pragma.
1682 setObjTarget :: HscTarget -> DynP ()
1683 setObjTarget l = upd set
1686 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1689 setOptLevel :: Int -> DynFlags -> DynFlags
1690 setOptLevel n dflags
1691 | hscTarget dflags == HscInterpreted && n > 0
1693 -- not in IO any more, oh well:
1694 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1696 = updOptLevel n dflags
1699 -- -Odph is equivalent to
1701 -- -O2 optimise as much as possible
1702 -- -fno-method-sharing sharing specialisation defeats fusion
1704 -- -fdicts-cheap always inline dictionaries
1705 -- -fmax-simplifier-iterations20 this is necessary sometimes
1706 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1708 setDPHOpt :: DynFlags -> DynFlags
1709 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1710 , specConstrThreshold = Nothing
1712 `dopt_set` Opt_DictsCheap
1713 `dopt_unset` Opt_MethodSharing
1717 setMainIs :: String -> DynP ()
1719 | not (null main_fn) && isLower (head main_fn)
1720 -- The arg looked like "Foo.Bar.baz"
1721 = upd $ \d -> d{ mainFunIs = Just main_fn,
1722 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1724 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1725 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1727 | otherwise -- The arg looked like "baz"
1728 = upd $ \d -> d{ mainFunIs = Just arg }
1730 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1732 -----------------------------------------------------------------------------
1733 -- Paths & Libraries
1735 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1737 -- -i on its own deletes the import paths
1738 addImportPath "" = upd (\s -> s{importPaths = []})
1739 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1743 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1746 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1748 addFrameworkPath p =
1749 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1751 #ifndef mingw32_TARGET_OS
1752 split_marker :: Char
1753 split_marker = ':' -- not configurable (ToDo)
1756 splitPathList :: String -> [String]
1757 splitPathList s = filter notNull (splitUp s)
1758 -- empty paths are ignored: there might be a trailing
1759 -- ':' in the initial list, for example. Empty paths can
1760 -- cause confusion when they are translated into -I options
1761 -- for passing to gcc.
1763 #ifndef mingw32_TARGET_OS
1764 splitUp xs = split split_marker xs
1766 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1768 -- That is, if "foo:bar:baz" is used, this interpreted as
1769 -- consisting of three entries, 'foo', 'bar', 'baz'.
1770 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1771 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1773 -- Notice that no attempt is made to fully replace the 'standard'
1774 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1775 -- that this will cause too much breakage for users & ':' will
1776 -- work fine even with DOS paths, if you're not insisting on being silly.
1779 splitUp (x:':':div:xs) | div `elem` dir_markers
1780 = ((x:':':div:p): splitUp rs)
1782 (p,rs) = findNextPath xs
1783 -- we used to check for existence of the path here, but that
1784 -- required the IO monad to be threaded through the command-line
1785 -- parser which is quite inconvenient. The
1786 splitUp xs = cons p (splitUp rs)
1788 (p,rs) = findNextPath xs
1793 -- will be called either when we've consumed nought or the
1794 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1795 -- finding the next split marker.
1797 case break (`elem` split_markers) xs of
1798 (p, _:ds) -> (p, ds)
1801 split_markers :: [Char]
1802 split_markers = [':', ';']
1804 dir_markers :: [Char]
1805 dir_markers = ['/', '\\']
1808 -- -----------------------------------------------------------------------------
1809 -- tmpDir, where we store temporary files.
1811 setTmpDir :: FilePath -> DynFlags -> DynFlags
1812 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1813 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1814 -- seem necessary now --SDM 7/2/2008
1816 -----------------------------------------------------------------------------
1819 setOptHpcDir :: String -> DynP ()
1820 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1822 -----------------------------------------------------------------------------
1823 -- Via-C compilation stuff
1825 -- There are some options that we need to pass to gcc when compiling
1826 -- Haskell code via C, but are only supported by recent versions of
1827 -- gcc. The configure script decides which of these options we need,
1828 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1829 -- read before each via-C compilation. The advantage of having these
1830 -- in a separate file is that the file can be created at install-time
1831 -- depending on the available gcc version, and even re-generated later
1832 -- if gcc is upgraded.
1834 -- The options below are not dependent on the version of gcc, only the
1837 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1838 [String]) -- for registerised HC compilations
1839 machdepCCOpts _dflags
1840 #if alpha_TARGET_ARCH
1842 #ifdef HAVE_THREADED_RTS_SUPPORT
1846 -- For now, to suppress the gcc warning "call-clobbered
1847 -- register used for global register variable", we simply
1848 -- disable all warnings altogether using the -w flag. Oh well.
1850 #elif hppa_TARGET_ARCH
1851 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1852 -- (very nice, but too bad the HP /usr/include files don't agree.)
1853 = ( ["-D_HPUX_SOURCE"], [] )
1855 #elif m68k_TARGET_ARCH
1856 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1857 -- popping of args to routines to be explicit; if we let things
1858 -- be deferred 'til after an STGJUMP, imminent death is certain!
1860 -- -fomit-frame-pointer : *don't*
1861 -- It's better to have a6 completely tied up being a frame pointer
1862 -- rather than let GCC pick random things to do with it.
1863 -- (If we want to steal a6, then we would try to do things
1864 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1865 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1867 #elif i386_TARGET_ARCH
1868 -- -fno-defer-pop : basically the same game as for m68k
1870 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1871 -- the fp (%ebp) for our register maps.
1872 = let n_regs = stolen_x86_regs _dflags
1875 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1876 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1879 "-fomit-frame-pointer",
1880 -- we want -fno-builtin, because when gcc inlines
1881 -- built-in functions like memcpy() it tends to
1882 -- run out of registers, requiring -monly-n-regs
1884 "-DSTOLEN_X86_REGS="++show n_regs ]
1887 #elif ia64_TARGET_ARCH
1888 = ( [], ["-fomit-frame-pointer", "-G0"] )
1890 #elif x86_64_TARGET_ARCH
1891 = ( [], ["-fomit-frame-pointer",
1892 "-fno-asynchronous-unwind-tables",
1893 -- the unwind tables are unnecessary for HC code,
1894 -- and get in the way of -split-objs. Another option
1895 -- would be to throw them away in the mangler, but this
1898 -- calling builtins like strlen() using the FFI can
1899 -- cause gcc to run out of regs, so use the external
1903 #elif sparc_TARGET_ARCH
1905 -- For now, to suppress the gcc warning "call-clobbered
1906 -- register used for global register variable", we simply
1907 -- disable all warnings altogether using the -w flag. Oh well.
1909 #elif powerpc_apple_darwin_TARGET
1911 -- Disable Apple's precompiling preprocessor. It's a great thing
1912 -- for "normal" programs, but it doesn't support register variable
1914 = ( [], ["-no-cpp-precomp"] )
1919 picCCOpts :: DynFlags -> [String]
1921 #if darwin_TARGET_OS
1922 -- Apple prefers to do things the other way round.
1923 -- PIC is on by default.
1924 -- -mdynamic-no-pic:
1925 -- Turn off PIC code generation.
1927 -- Don't generate "common" symbols - these are unwanted
1928 -- in dynamic libraries.
1931 = ["-fno-common", "-D__PIC__"]
1933 = ["-mdynamic-no-pic"]
1934 #elif mingw32_TARGET_OS
1935 -- no -fPIC for Windows
1942 = ["-fPIC", "-D__PIC__"]
1947 -- -----------------------------------------------------------------------------
1951 can_split = cSplitObjs == "YES"
1953 -- -----------------------------------------------------------------------------
1956 compilerInfo :: [(String, String)]
1957 compilerInfo = [("Project name", cProjectName),
1958 ("Project version", cProjectVersion),
1959 ("Booter version", cBooterVersion),
1961 ("Interface file version", cHscIfaceFileVersion),
1962 ("Have interpreter", cGhcWithInterpreter),
1963 ("Object splitting", cSplitObjs),
1964 ("Have native code generator", cGhcWithNativeCodeGen),
1965 ("Support SMP", cGhcWithSMP),
1966 ("Unregisterised", cGhcUnregisterised),
1967 ("Tables next to code", cGhcEnableTablesNextToCode),
1968 ("Win32 DLLs", cEnableWin32DLLs),
1969 ("RTS ways", cGhcRTSWays),
1970 ("Leading underscore", cLeadingUnderscore),
1971 ("Debug on", show debugIsOn)