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,
28 -- Configuration of the core-to-core and stg-to-stg phases
32 SimplifierMode(..), FloatOutSwitches(..),
33 getCoreToDo, getStgToDo,
35 -- Manipulating DynFlags
36 defaultDynFlags, -- DynFlags
37 initDynFlags, -- DynFlags -> IO DynFlags
39 dopt, -- DynFlag -> DynFlags -> Bool
40 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
41 getOpts, -- (DynFlags -> [a]) -> IO [a]
52 machdepCCOpts, picCCOpts,
53 supportedLanguages, languageOptions,
57 #include "HsVersions.h"
61 import PrelNames ( mAIN )
62 #ifdef i386_TARGET_ARCH
63 import StaticFlags ( opt_Static )
65 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
67 import {-# SOURCE #-} Packages (PackageState)
68 import DriverPhases ( Phase(..), phaseInputExt )
71 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
72 import Panic ( panic, GhcException(..) )
73 import UniqFM ( UniqFM )
75 import Maybes ( orElse )
76 import SrcLoc ( SrcSpan )
78 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
80 import Data.IORef ( readIORef )
81 import Control.Exception ( throwDyn )
82 import Control.Monad ( when )
85 import System.FilePath
86 import System.IO ( hPutStrLn, stderr )
88 -- -----------------------------------------------------------------------------
96 | Opt_D_dump_cmmz_pretty
100 | Opt_D_dump_asm_native
101 | Opt_D_dump_asm_liveness
102 | Opt_D_dump_asm_coalesce
103 | Opt_D_dump_asm_regalloc
104 | Opt_D_dump_asm_regalloc_stages
105 | Opt_D_dump_asm_conflicts
106 | Opt_D_dump_asm_stats
112 | Opt_D_dump_inlinings
113 | Opt_D_dump_rule_firings
114 | Opt_D_dump_occur_anal
118 | Opt_D_dump_simpl_iterations
119 | Opt_D_dump_simpl_phases
128 | Opt_D_dump_worker_wrapper
129 | Opt_D_dump_rn_trace
130 | Opt_D_dump_rn_stats
132 | Opt_D_dump_simpl_stats
133 | Opt_D_dump_tc_trace
134 | Opt_D_dump_if_trace
140 | Opt_D_verbose_core2core
141 | Opt_D_verbose_stg2stg
143 | Opt_D_dump_hi_diffs
144 | Opt_D_dump_minimal_imports
145 | Opt_D_dump_mod_cycles
146 | Opt_D_dump_view_pattern_commoning
147 | Opt_D_faststring_stats
148 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
149 | Opt_D_no_debug_output
155 | Opt_WarnIsError -- -Werror; makes warnings fatal
156 | Opt_WarnDuplicateExports
158 | Opt_WarnImplicitPrelude
159 | Opt_WarnIncompletePatterns
160 | Opt_WarnIncompletePatternsRecUpd
161 | Opt_WarnMissingFields
162 | Opt_WarnMissingMethods
163 | Opt_WarnMissingSigs
164 | Opt_WarnNameShadowing
165 | Opt_WarnOverlappingPatterns
166 | Opt_WarnSimplePatterns
167 | Opt_WarnTypeDefaults
168 | Opt_WarnMonomorphism
169 | Opt_WarnUnusedBinds
170 | Opt_WarnUnusedImports
171 | Opt_WarnUnusedMatches
172 | Opt_WarnDeprecations
173 | Opt_WarnDeprecatedFlags
174 | Opt_WarnDodgyImports
179 | Opt_OverlappingInstances
180 | Opt_UndecidableInstances
181 | Opt_IncoherentInstances
182 | Opt_MonomorphismRestriction
184 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
185 | Opt_ForeignFunctionInterface
186 | Opt_UnliftedFFITypes
187 | Opt_PArr -- Syntactic support for parallel arrays
188 | Opt_Arrows -- Arrow-notation syntax
189 | Opt_TemplateHaskell
193 | Opt_ImplicitPrelude
194 | Opt_ScopedTypeVariables
198 | Opt_OverloadedStrings
199 | Opt_DisambiguateRecordFields
200 | Opt_RecordWildCards
205 | Opt_StandaloneDeriving
206 | Opt_DeriveDataTypeable
207 | Opt_TypeSynonymInstances
208 | Opt_FlexibleContexts
209 | Opt_FlexibleInstances
210 | Opt_ConstrainedClassMethods
211 | Opt_MultiParamTypeClasses
212 | Opt_FunctionalDependencies
214 | Opt_PolymorphicComponents
215 | Opt_ExistentialQuantification
219 | Opt_PatternSignatures
220 | Opt_ParallelListComp
221 | Opt_TransformListComp
222 | Opt_GeneralizedNewtypeDeriving
225 | Opt_LiberalTypeSynonyms
228 | Opt_ImpredicativeTypes
231 | Opt_PrintExplicitForalls
236 | Opt_StaticArgumentTransformation
240 | Opt_IgnoreInterfacePragmas
241 | Opt_OmitInterfacePragmas
242 | Opt_DoLambdaEtaExpansion
246 | Opt_UnboxStrictFields
251 | Opt_RegsGraph -- do graph coloring register allocation
252 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
260 | Opt_ExcessPrecision
261 | Opt_ReadUserPackageConf
265 | Opt_HideAllPackages
266 | Opt_PrintBindResult
270 | Opt_BreakOnException
272 | Opt_PrintEvldWithShow
273 | Opt_PrintBindContents
277 | Opt_ConvertToZipCfgAndBack
278 | Opt_AutoLinkPackages
289 data DynFlags = DynFlags {
292 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
293 stgToDo :: Maybe [StgToDo], -- similarly
294 hscTarget :: HscTarget,
295 hscOutName :: String, -- name of the output file
296 extCoreName :: String, -- name of the .core output file
297 verbosity :: Int, -- verbosity level
298 optLevel :: Int, -- optimisation level
299 simplPhases :: Int, -- number of simplifier phases
300 maxSimplIterations :: Int, -- max simplifier iterations
301 shouldDumpSimplPhase :: SimplifierMode -> Bool,
302 ruleCheck :: Maybe String,
304 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
305 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
306 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
308 stolen_x86_regs :: Int,
309 cmdlineHcIncludes :: [String], -- -#includes
310 importPaths :: [FilePath],
312 mainFunIs :: Maybe String,
313 ctxtStkDepth :: Int, -- Typechecker context stack depth
315 dphBackend :: DPHBackend,
317 thisPackage :: PackageId,
320 wayNames :: [WayName], -- way flags from the cmd line
321 buildTag :: String, -- the global "way" (eg. "p" for prof)
322 rtsBuildTag :: String, -- the RTS "way"
325 objectDir :: Maybe String,
326 hiDir :: Maybe String,
327 stubDir :: Maybe String,
333 outputFile :: Maybe String,
334 outputHi :: Maybe String,
335 dynLibLoader :: DynLibLoader,
337 -- | This is set by DriverPipeline.runPipeline based on where
338 -- its output is going.
339 dumpPrefix :: Maybe FilePath,
341 -- | Override the dumpPrefix set by runPipeline.
342 -- Set by -ddump-file-prefix
343 dumpPrefixForce :: Maybe FilePath,
345 includePaths :: [String],
346 libraryPaths :: [String],
347 frameworkPaths :: [String], -- used on darwin only
348 cmdlineFrameworks :: [String], -- ditto
349 tmpDir :: String, -- no trailing '/'
351 ghcUsagePath :: FilePath, -- Filled in by SysTools
352 ghciUsagePath :: FilePath, -- ditto
354 hpcDir :: String, -- ^ path to store the .mix files
356 -- options for particular phases
365 opt_windres :: [String],
367 -- commands for particular phases
369 pgm_P :: (String,[Option]),
371 pgm_c :: (String,[Option]),
372 pgm_m :: (String,[Option]),
373 pgm_s :: (String,[Option]),
374 pgm_a :: (String,[Option]),
375 pgm_l :: (String,[Option]),
376 pgm_dll :: (String,[Option]),
378 pgm_sysman :: String,
379 pgm_windres :: String,
382 extraPkgConfs :: [FilePath],
383 topDir :: FilePath, -- filled in by SysTools
384 systemPackageConfig :: FilePath, -- ditto
385 -- The -package-conf flags given on the command line, in the order
388 packageFlags :: [PackageFlag],
389 -- The -package and -hide-package flags from the command-line
392 -- NB. do not modify this field, it is calculated by
393 -- Packages.initPackages and Packages.updatePackages.
394 pkgDatabase :: Maybe (UniqFM PackageConfig),
395 pkgState :: PackageState,
401 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
403 haddockOptions :: Maybe String
414 -- | will this target result in an object file on the disk?
415 isObjectTarget :: HscTarget -> Bool
416 isObjectTarget HscC = True
417 isObjectTarget HscAsm = True
418 isObjectTarget _ = False
420 -- | The 'GhcMode' tells us whether we're doing multi-module
421 -- compilation (controlled via the "GHC" API) or one-shot
422 -- (single-module) compilation. This makes a difference primarily to
423 -- the "Finder": in one-shot mode we look for interface files for
424 -- imported modules, but in multi-module mode we look for source files
425 -- in order to check whether they need to be recompiled.
427 = CompManager -- ^ --make, GHCi, etc.
428 | OneShot -- ^ ghc -c Foo.hs
429 | MkDepend -- ^ ghc -M, see Finder for why we need this
432 isOneShot :: GhcMode -> Bool
433 isOneShot OneShot = True
434 isOneShot _other = False
436 -- | What kind of linking to do.
437 data GhcLink -- What to do in the link step, if there is one
438 = NoLink -- Don't link at all
439 | LinkBinary -- Link object code into a binary
440 | LinkInMemory -- Use the in-memory dynamic linker
441 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
444 isNoLink :: GhcLink -> Bool
445 isNoLink NoLink = True
449 = ExposePackage String
451 | IgnorePackage String
454 defaultHscTarget :: HscTarget
455 defaultHscTarget = defaultObjectTarget
457 -- | the 'HscTarget' value corresponding to the default way to create
458 -- object files on the current platform.
459 defaultObjectTarget :: HscTarget
461 | cGhcWithNativeCodeGen == "YES" = HscAsm
466 | Wrapped (Maybe String)
470 initDynFlags :: DynFlags -> IO DynFlags
471 initDynFlags dflags = do
472 -- someday these will be dynamic flags
473 ways <- readIORef v_Ways
474 build_tag <- readIORef v_Build_tag
475 rts_build_tag <- readIORef v_RTS_Build_tag
478 buildTag = build_tag,
479 rtsBuildTag = rts_build_tag
482 defaultDynFlags :: DynFlags
485 ghcMode = CompManager,
486 ghcLink = LinkBinary,
489 hscTarget = defaultHscTarget,
495 maxSimplIterations = 4,
496 shouldDumpSimplPhase = const False,
498 specConstrThreshold = Just 200,
499 specConstrCount = Just 3,
500 liberateCaseThreshold = Just 200,
502 cmdlineHcIncludes = [],
506 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
510 thisPackage = mainPackageId,
516 objectSuf = phaseInputExt StopLn,
517 hcSuf = phaseInputExt HCc,
520 outputFile = Nothing,
522 dynLibLoader = Deployable,
523 dumpPrefix = Nothing,
524 dumpPrefixForce = Nothing,
528 cmdlineFrameworks = [],
529 tmpDir = cDEFAULT_TMPDIR,
547 pkgDatabase = Nothing,
548 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
549 wayNames = panic "defaultDynFlags: No wayNames",
550 buildTag = panic "defaultDynFlags: No buildTag",
551 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
552 -- initSysTools fills all these in
553 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
554 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
555 topDir = panic "defaultDynFlags: No topDir",
556 systemPackageConfig = panic "defaultDynFlags: No systemPackageConfig",
557 pgm_L = panic "defaultDynFlags: No pgm_L",
558 pgm_P = panic "defaultDynFlags: No pgm_P",
559 pgm_F = panic "defaultDynFlags: No pgm_F",
560 pgm_c = panic "defaultDynFlags: No pgm_c",
561 pgm_m = panic "defaultDynFlags: No pgm_m",
562 pgm_s = panic "defaultDynFlags: No pgm_s",
563 pgm_a = panic "defaultDynFlags: No pgm_a",
564 pgm_l = panic "defaultDynFlags: No pgm_l",
565 pgm_dll = panic "defaultDynFlags: No pgm_dll",
566 pgm_T = panic "defaultDynFlags: No pgm_T",
567 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
568 pgm_windres = panic "defaultDynFlags: No pgm_windres",
569 -- end of initSysTools values
570 haddockOptions = Nothing,
572 Opt_AutoLinkPackages,
573 Opt_ReadUserPackageConf,
575 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
576 -- behaviour the default, to see if anyone notices
580 Opt_MonomorphismRestriction,
588 Opt_PrintBindContents
590 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
591 -- The default -O0 options
594 log_action = \severity srcSpan style msg ->
596 SevInfo -> hPutStrLn stderr (show (msg style))
597 SevFatal -> hPutStrLn stderr (show (msg style))
598 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
604 0 | print errors & warnings only
605 1 | minimal verbosity: print "compiling M ... done." for each module.
606 2 | equivalent to -dshow-passes
607 3 | equivalent to existing "ghc -v"
608 4 | "ghc -v -ddump-most"
609 5 | "ghc -v -ddump-all"
612 dopt :: DynFlag -> DynFlags -> Bool
613 dopt f dflags = f `elem` (flags dflags)
615 dopt_set :: DynFlags -> DynFlag -> DynFlags
616 dopt_set dfs f = dfs{ flags = f : flags dfs }
618 dopt_unset :: DynFlags -> DynFlag -> DynFlags
619 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
621 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
622 getOpts dflags opts = reverse (opts dflags)
623 -- We add to the options from the front, so we need to reverse the list
625 getVerbFlag :: DynFlags -> String
627 | verbosity dflags >= 3 = "-v"
630 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
631 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
632 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptdep, addOptwindres,
633 addCmdlineFramework, addHaddockOpts
634 :: String -> DynFlags -> DynFlags
635 setOutputFile, setOutputHi, setDumpPrefixForce
636 :: Maybe String -> DynFlags -> DynFlags
638 setObjectDir f d = d{ objectDir = Just f}
639 setHiDir f d = d{ hiDir = Just f}
640 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
641 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
642 -- #included from the .hc file when compiling with -fvia-C.
644 setObjectSuf f d = d{ objectSuf = f}
645 setHiSuf f d = d{ hiSuf = f}
646 setHcSuf f d = d{ hcSuf = f}
648 setOutputFile f d = d{ outputFile = f}
649 setOutputHi f d = d{ outputHi = f}
651 parseDynLibLoaderMode f d =
653 ("deploy", "") -> d{ dynLibLoader = Deployable }
654 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
655 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
656 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
657 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
658 (_,_) -> error "Unknown dynlib loader"
660 setDumpPrefixForce f d = d { dumpPrefixForce = f}
662 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
663 -- Config.hs should really use Option.
664 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
666 setPgmL f d = d{ pgm_L = f}
667 setPgmF f d = d{ pgm_F = f}
668 setPgmc f d = d{ pgm_c = (f,[])}
669 setPgmm f d = d{ pgm_m = (f,[])}
670 setPgms f d = d{ pgm_s = (f,[])}
671 setPgma f d = d{ pgm_a = (f,[])}
672 setPgml f d = d{ pgm_l = (f,[])}
673 setPgmdll f d = d{ pgm_dll = (f,[])}
674 setPgmwindres f d = d{ pgm_windres = f}
676 addOptL f d = d{ opt_L = f : opt_L d}
677 addOptP f d = d{ opt_P = f : opt_P d}
678 addOptF f d = d{ opt_F = f : opt_F d}
679 addOptc f d = d{ opt_c = f : opt_c d}
680 addOptm f d = d{ opt_m = f : opt_m d}
681 addOpta f d = d{ opt_a = f : opt_a d}
682 addOptl f d = d{ opt_l = f : opt_l d}
683 addOptdep f d = d{ opt_dep = f : opt_dep d}
684 addOptwindres f d = d{ opt_windres = f : opt_windres d}
686 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
688 addHaddockOpts f d = d{ haddockOptions = Just f}
690 -- -----------------------------------------------------------------------------
691 -- Command-line options
693 -- When invoking external tools as part of the compilation pipeline, we
694 -- pass these a sequence of options on the command-line. Rather than
695 -- just using a list of Strings, we use a type that allows us to distinguish
696 -- between filepaths and 'other stuff'. [The reason being, of course, that
697 -- this type gives us a handle on transforming filenames, and filenames only,
698 -- to whatever format they're expected to be on a particular platform.]
701 = FileOption -- an entry that _contains_ filename(s) / filepaths.
702 String -- a non-filepath prefix that shouldn't be
703 -- transformed (e.g., "/out=")
704 String -- the filepath/filename portion
707 -----------------------------------------------------------------------------
708 -- Setting the optimisation level
710 updOptLevel :: Int -> DynFlags -> DynFlags
711 -- Set dynflags appropriate to the optimisation level
713 = dfs2{ optLevel = final_n }
715 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
716 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
717 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
719 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
720 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
722 optLevelFlags :: [([Int], DynFlag)]
724 = [ ([0], Opt_IgnoreInterfacePragmas)
725 , ([0], Opt_OmitInterfacePragmas)
727 , ([1,2], Opt_IgnoreAsserts)
728 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
730 , ([1,2], Opt_DoEtaReduction)
731 , ([1,2], Opt_CaseMerge)
732 , ([1,2], Opt_Strictness)
734 , ([1,2], Opt_FullLaziness)
736 , ([2], Opt_LiberateCase)
737 , ([2], Opt_SpecConstr)
738 , ([2], Opt_StaticArgumentTransformation)
740 , ([0,1,2], Opt_DoLambdaEtaExpansion)
741 -- This one is important for a tiresome reason:
742 -- we want to make sure that the bindings for data
743 -- constructors are eta-expanded. This is probably
744 -- a good thing anyway, but it seems fragile.
747 -- -----------------------------------------------------------------------------
748 -- Standard sets of warning options
750 standardWarnings :: [DynFlag]
752 = [ Opt_WarnDeprecations,
753 Opt_WarnDeprecatedFlags,
754 Opt_WarnOverlappingPatterns,
755 Opt_WarnMissingFields,
756 Opt_WarnMissingMethods,
757 Opt_WarnDuplicateExports
760 minusWOpts :: [DynFlag]
762 = standardWarnings ++
763 [ Opt_WarnUnusedBinds,
764 Opt_WarnUnusedMatches,
765 Opt_WarnUnusedImports,
766 Opt_WarnIncompletePatterns,
770 minusWallOpts :: [DynFlag]
773 [ Opt_WarnTypeDefaults,
774 Opt_WarnNameShadowing,
780 -- minuswRemovesOpts should be every warning option
781 minuswRemovesOpts :: [DynFlag]
784 [Opt_WarnImplicitPrelude,
785 Opt_WarnIncompletePatternsRecUpd,
786 Opt_WarnSimplePatterns,
787 Opt_WarnMonomorphism,
791 -- -----------------------------------------------------------------------------
792 -- CoreToDo: abstraction of core-to-core passes to run.
794 data CoreToDo -- These are diff core-to-core passes,
795 -- which may be invoked in any order,
796 -- as many times as you like.
798 = CoreDoSimplify -- The core-to-core simplifier.
801 -- Each run of the simplifier can take a different
802 -- set of simplifier-specific flags.
804 | CoreDoFloatOutwards FloatOutSwitches
809 | CoreDoWorkerWrapper
812 | CoreDoOldStrictness
815 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
816 -- matching this string
817 | CoreDoVectorisation DPHBackend
818 | CoreDoNothing -- Useful when building up
819 | CoreDoPasses [CoreToDo] -- lists of these things
821 data SimplifierMode -- See comments in SimplMonad
823 | SimplPhase Int [String]
825 data SimplifierSwitch
826 = MaxSimplifierIterations Int
829 data FloatOutSwitches
830 = FloatOutSw Bool -- True <=> float lambdas to top level
831 Bool -- True <=> float constants to top level,
832 -- even if they do not escape a lambda
835 -- The core-to-core pass ordering is derived from the DynFlags:
836 runWhen :: Bool -> CoreToDo -> CoreToDo
837 runWhen True do_this = do_this
838 runWhen False _ = CoreDoNothing
840 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
841 runMaybe (Just x) f = f x
842 runMaybe Nothing _ = CoreDoNothing
844 getCoreToDo :: DynFlags -> [CoreToDo]
846 | Just todo <- coreToDo dflags = todo -- set explicitly by user
847 | otherwise = core_todo
849 opt_level = optLevel dflags
850 phases = simplPhases dflags
851 max_iter = maxSimplIterations dflags
852 strictness = dopt Opt_Strictness dflags
853 full_laziness = dopt Opt_FullLaziness dflags
854 cse = dopt Opt_CSE dflags
855 spec_constr = dopt Opt_SpecConstr dflags
856 liberate_case = dopt Opt_LiberateCase dflags
857 rule_check = ruleCheck dflags
858 static_args = dopt Opt_StaticArgumentTransformation dflags
860 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
862 simpl_phase phase names iter
864 [ CoreDoSimplify (SimplPhase phase names) [
865 MaxSimplifierIterations iter
867 maybe_rule_check phase
871 = runWhen (dopt Opt_Vectorise dflags)
872 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
875 -- By default, we have 2 phases before phase 0.
877 -- Want to run with inline phase 2 after the specialiser to give
878 -- maximum chance for fusion to work before we inline build/augment
879 -- in phase 1. This made a difference in 'ansi' where an
880 -- overloaded function wasn't inlined till too late.
882 -- Need phase 1 so that build/augment get
883 -- inlined. I found that spectral/hartel/genfft lost some useful
884 -- strictness in the function sumcode' if augment is not inlined
885 -- before strictness analysis runs
886 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
887 | phase <- [phases, phases-1 .. 1] ]
890 -- initial simplify: mk specialiser happy: minimum effort please
891 simpl_gently = CoreDoSimplify SimplGently [
893 -- Don't inline anything till full laziness has bitten
894 -- In particular, inlining wrappers inhibits floating
895 -- e.g. ...(case f x of ...)...
896 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
897 -- ==> ...(case x of I# x# -> case fw x# of ...)...
898 -- and now the redex (f x) isn't floatable any more
899 -- Similarly, don't apply any rules until after full
900 -- laziness. Notably, list fusion can prevent floating.
902 NoCaseOfCase, -- Don't do case-of-case transformations.
903 -- This makes full laziness work better
904 MaxSimplifierIterations max_iter
908 if opt_level == 0 then
910 simpl_phase 0 ["final"] max_iter]
911 else {- opt_level >= 1 -} [
913 -- We want to do the static argument transform before full laziness as it
914 -- may expose extra opportunities to float things outwards. However, to fix
915 -- up the output of the transformation we need at do at least one simplify
916 -- after this before anything else
917 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
919 -- We run vectorisation here for now, but we might also try to run
923 -- initial simplify: mk specialiser happy: minimum effort please
926 -- Specialisation is best done before full laziness
927 -- so that overloaded functions have all their dictionary lambdas manifest
930 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
936 -- Phase 0: allow all Ids to be inlined now
937 -- This gets foldr inlined before strictness analysis
939 -- At least 3 iterations because otherwise we land up with
940 -- huge dead expressions because of an infelicity in the
942 -- let k = BIG in foldr k z xs
943 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
944 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
946 simpl_phase 0 ["main"] (max max_iter 3),
949 #ifdef OLD_STRICTNESS
952 runWhen strictness (CoreDoPasses [
956 simpl_phase 0 ["post-worker-wrapper"] max_iter
959 runWhen full_laziness
960 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
961 True)), -- Float constants
962 -- nofib/spectral/hartel/wang doubles in speed if you
963 -- do full laziness late in the day. It only happens
964 -- after fusion and other stuff, so the early pass doesn't
965 -- catch it. For the record, the redex is
966 -- f_el22 (f_el21 r_midblock)
970 -- We want CSE to follow the final full-laziness pass, because it may
971 -- succeed in commoning up things floated out by full laziness.
972 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
978 -- Case-liberation for -O2. This should be after
979 -- strictness analysis and the simplification which follows it.
980 runWhen liberate_case (CoreDoPasses [
982 simpl_phase 0 ["post-liberate-case"] max_iter
983 ]), -- Run the simplifier after LiberateCase to vastly
984 -- reduce the possiblility of shadowing
985 -- Reason: see Note [Shadowing] in SpecConstr.lhs
987 runWhen spec_constr CoreDoSpecConstr,
991 -- Final clean-up simplification:
992 simpl_phase 0 ["final"] max_iter
995 -- -----------------------------------------------------------------------------
996 -- StgToDo: abstraction of stg-to-stg passes to run.
999 = StgDoMassageForProfiling -- should be (next to) last
1000 -- There's also setStgVarInfo, but its absolute "lastness"
1001 -- is so critical that it is hardwired in (no flag).
1004 getStgToDo :: DynFlags -> [StgToDo]
1006 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1009 stg_stats = dopt Opt_StgStats dflags
1011 todo1 = if stg_stats then [D_stg_stats] else []
1013 todo2 | WayProf `elem` wayNames dflags
1014 = StgDoMassageForProfiling : todo1
1018 -- -----------------------------------------------------------------------------
1021 allFlags :: [String]
1022 allFlags = map ('-':) $
1023 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1024 map ("fno-"++) flags ++
1025 map ("f"++) flags ++
1026 map ("X"++) supportedLanguages ++
1027 map ("XNo"++) supportedLanguages
1028 where ok (PrefixPred _ _) = False
1030 flags = [ name | (name, _, _) <- fFlags ]
1032 dynamic_flags :: [Flag DynP]
1034 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1035 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1036 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1037 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1038 , Flag "v" (OptIntSuffix setVerbosity) Supported
1040 ------- Specific phases --------------------------------------------
1041 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1042 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1043 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1044 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1045 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1046 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1047 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1048 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1049 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1050 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1052 , Flag "optL" (HasArg (upd . addOptL)) Supported
1053 , Flag "optP" (HasArg (upd . addOptP)) Supported
1054 , Flag "optF" (HasArg (upd . addOptF)) Supported
1055 , Flag "optc" (HasArg (upd . addOptc)) Supported
1056 , Flag "optm" (HasArg (upd . addOptm)) Supported
1057 , Flag "opta" (HasArg (upd . addOpta)) Supported
1058 , Flag "optl" (HasArg (upd . addOptl)) Supported
1059 , Flag "optdep" (HasArg (upd . addOptdep)) Supported
1060 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1063 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1066 -------- Linking ----------------------------------------------------
1067 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1069 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1070 (Deprecated "Use -c instead")
1071 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1073 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1076 ------- Libraries ---------------------------------------------------
1077 , Flag "L" (Prefix addLibraryPath ) Supported
1078 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1080 ------- Frameworks --------------------------------------------------
1081 -- -framework-path should really be -F ...
1082 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1083 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1085 ------- Output Redirection ------------------------------------------
1086 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1087 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1088 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1089 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1090 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1091 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1092 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1093 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1094 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1095 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1098 ------- Keeping temporary files -------------------------------------
1099 -- These can be singular (think ghc -c) or plural (think ghc --make)
1100 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1101 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1102 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1103 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1104 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1105 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1106 -- This only makes sense as plural
1107 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1109 ------- Miscellaneous ----------------------------------------------
1110 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1111 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1112 , Flag "main-is" (SepArg setMainIs ) Supported
1113 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1114 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1115 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1117 ------- recompilation checker --------------------------------------
1118 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1119 (Deprecated "Use -fno-force-recomp instead")
1120 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1121 (Deprecated "Use -fforce-recomp instead")
1123 ------- Packages ----------------------------------------------------
1124 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1125 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1127 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1128 , Flag "package" (HasArg exposePackage) Supported
1129 , Flag "hide-package" (HasArg hidePackage) Supported
1130 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1132 , Flag "ignore-package" (HasArg ignorePackage)
1134 , Flag "syslib" (HasArg exposePackage)
1135 (Deprecated "Use -package instead")
1137 ------ HsCpp opts ---------------------------------------------------
1138 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1139 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1141 ------- Include/Import Paths ----------------------------------------
1142 , Flag "I" (Prefix addIncludePath) Supported
1143 , Flag "i" (OptPrefix addImportPath ) Supported
1145 ------ Debugging ----------------------------------------------------
1146 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1148 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1150 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1152 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1154 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1156 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1158 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1160 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1162 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1164 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1166 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1168 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1170 , Flag "ddump-asm-regalloc-stages"
1171 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1173 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1175 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1177 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1179 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1181 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1183 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1185 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1187 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1189 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1191 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1193 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1195 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1197 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1199 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1201 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1203 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1205 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1207 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1209 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1211 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1213 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1215 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1217 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1219 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1221 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1223 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1225 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1227 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1229 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1231 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1233 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1235 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1237 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1239 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1241 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1243 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1245 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1247 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1249 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1251 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1253 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1255 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1258 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1260 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1262 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1264 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1266 , Flag "dshow-passes"
1267 (NoArg (do setDynFlag Opt_ForceRecomp
1268 setVerbosity (Just 2)))
1270 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1273 ------ Machine dependant (-m<blah>) stuff ---------------------------
1275 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1277 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1279 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1282 ------ Warning opts -------------------------------------------------
1283 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1285 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1287 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1289 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1291 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1292 (Deprecated "Use -w instead")
1293 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1296 ------ Optimisation flags ------------------------------------------
1297 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1298 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1299 (Deprecated "Use -O0 instead")
1300 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1301 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1303 -- If the number is missing, use 1
1305 , Flag "fsimplifier-phases"
1306 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1308 , Flag "fmax-simplifier-iterations"
1309 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1312 , Flag "fspec-constr-threshold"
1313 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1315 , Flag "fno-spec-constr-threshold"
1316 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1318 , Flag "fspec-constr-count"
1319 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1321 , Flag "fno-spec-constr-count"
1322 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1324 , Flag "fliberate-case-threshold"
1325 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1327 , Flag "fno-liberate-case-threshold"
1328 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1331 , Flag "frule-check"
1332 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1334 , Flag "fcontext-stack"
1335 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1338 ------ DPH flags ----------------------------------------------------
1341 (NoArg (upd (setDPHBackend DPHSeq)))
1344 (NoArg (upd (setDPHBackend DPHPar)))
1347 ------ Compiler flags -----------------------------------------------
1349 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1350 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1351 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1353 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1354 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1355 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1357 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1359 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1362 ++ map (mkFlag True "f" setDynFlag ) fFlags
1363 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1364 ++ map (mkFlag True "X" setDynFlag ) xFlags
1365 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1367 mkFlag :: Bool -- True => turn it on, False => turn it off
1369 -> (DynFlag -> DynP ())
1370 -> (String, DynFlag, Bool -> Deprecated)
1372 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1373 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1375 deprecatedForLanguage :: String -> Bool -> Deprecated
1376 deprecatedForLanguage lang turnOn =
1377 Deprecated ("Use the " ++ prefix ++ lang ++ " language instead")
1378 where prefix = if turnOn then "" else "No"
1380 -- these -f<blah> flags can all be reversed with -fno-<blah>
1382 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1384 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1385 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1386 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1387 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1388 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1389 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1390 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1391 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1392 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1393 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1394 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1395 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1396 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1397 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1398 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1399 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1400 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1401 ( "warn-deprecations", Opt_WarnDeprecations, const Supported ),
1402 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1403 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1404 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1405 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1406 ( "strictness", Opt_Strictness, const Supported ),
1407 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1408 ( "full-laziness", Opt_FullLaziness, const Supported ),
1409 ( "liberate-case", Opt_LiberateCase, const Supported ),
1410 ( "spec-constr", Opt_SpecConstr, const Supported ),
1411 ( "cse", Opt_CSE, const Supported ),
1412 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1413 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1414 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1415 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1416 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1417 ( "case-merge", Opt_CaseMerge, const Supported ),
1418 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1419 ( "method-sharing", Opt_MethodSharing, const Supported ),
1420 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1421 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1422 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1423 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1424 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1425 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1426 ( "rewrite-rules", Opt_RewriteRules, const Supported ),
1427 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1428 ( "break-on-error", Opt_BreakOnError, const Supported ),
1429 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1430 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1431 ( "run-cps", Opt_RunCPSZ, const Supported ),
1432 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1433 ( "vectorise", Opt_Vectorise, const Supported ),
1434 ( "regs-graph", Opt_RegsGraph, const Supported ),
1435 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1436 ( "th", Opt_TemplateHaskell,
1437 deprecatedForLanguage "TemplateHaskell" ),
1438 ( "fi", Opt_ForeignFunctionInterface,
1439 deprecatedForLanguage "ForeignFunctionInterface" ),
1440 ( "ffi", Opt_ForeignFunctionInterface,
1441 deprecatedForLanguage "ForeignFunctionInterface" ),
1442 ( "arrows", Opt_Arrows,
1443 deprecatedForLanguage "Arrows" ),
1444 ( "generics", Opt_Generics,
1445 deprecatedForLanguage "Generics" ),
1446 ( "implicit-prelude", Opt_ImplicitPrelude,
1447 deprecatedForLanguage "ImplicitPrelude" ),
1448 ( "bang-patterns", Opt_BangPatterns,
1449 deprecatedForLanguage "BangPatterns" ),
1450 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1451 deprecatedForLanguage "MonomorphismRestriction" ),
1452 ( "mono-pat-binds", Opt_MonoPatBinds,
1453 deprecatedForLanguage "MonoPatBinds" ),
1454 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1455 deprecatedForLanguage "ExtendedDefaultRules" ),
1456 ( "implicit-params", Opt_ImplicitParams,
1457 deprecatedForLanguage "ImplicitParams" ),
1458 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1459 deprecatedForLanguage "ScopedTypeVariables" ),
1461 deprecatedForLanguage "PArr" ),
1462 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1463 deprecatedForLanguage "OverlappingInstances" ),
1464 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1465 deprecatedForLanguage "UndecidableInstances" ),
1466 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1467 deprecatedForLanguage "IncoherentInstances" ),
1468 ( "gen-manifest", Opt_GenManifest, const Supported ),
1469 ( "embed-manifest", Opt_EmbedManifest, const Supported )
1472 supportedLanguages :: [String]
1473 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1475 -- This may contain duplicates
1476 languageOptions :: [DynFlag]
1477 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1479 -- These -X<blah> flags can all be reversed with -XNo<blah>
1480 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1482 ( "CPP", Opt_Cpp, const Supported ),
1483 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1484 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1485 ( "MagicHash", Opt_MagicHash, const Supported ),
1486 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1487 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1488 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1489 ( "PatternSignatures", Opt_PatternSignatures, const Supported ),
1490 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1491 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1492 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1493 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1494 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1495 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1496 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1497 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1498 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1499 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1500 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1501 ( "Arrows", Opt_Arrows, const Supported ),
1502 ( "PArr", Opt_PArr, const Supported ),
1503 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1504 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1505 ( "Generics", Opt_Generics, const Supported ),
1507 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1508 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1509 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1510 ( "RecordPuns", Opt_RecordPuns,
1511 deprecatedForLanguage "NamedFieldPuns" ),
1512 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1513 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1514 ( "GADTs", Opt_GADTs, const Supported ),
1515 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1516 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1517 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1519 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1520 -- On by default (which is not strictly H98):
1521 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1522 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1523 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1524 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1525 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1526 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1527 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1528 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1529 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1530 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1531 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1532 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1533 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1534 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1535 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1536 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1537 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1538 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported )
1541 impliedFlags :: [(DynFlag, [DynFlag])]
1543 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1544 -- be completely rigid for GADTs
1545 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1546 -- Note [Scoped tyvars] in TcBinds
1549 glasgowExtsFlags :: [DynFlag]
1550 glasgowExtsFlags = [
1551 Opt_PrintExplicitForalls
1552 , Opt_ForeignFunctionInterface
1553 , Opt_UnliftedFFITypes
1555 , Opt_ImplicitParams
1556 , Opt_ScopedTypeVariables
1558 , Opt_TypeSynonymInstances
1559 , Opt_StandaloneDeriving
1560 , Opt_DeriveDataTypeable
1561 , Opt_FlexibleContexts
1562 , Opt_FlexibleInstances
1563 , Opt_ConstrainedClassMethods
1564 , Opt_MultiParamTypeClasses
1565 , Opt_FunctionalDependencies
1567 , Opt_PolymorphicComponents
1568 , Opt_ExistentialQuantification
1571 , Opt_LiberalTypeSynonyms
1573 , Opt_ImpredicativeTypes
1576 , Opt_ParallelListComp
1577 , Opt_EmptyDataDecls
1578 , Opt_KindSignatures
1579 , Opt_PatternSignatures
1580 , Opt_GeneralizedNewtypeDeriving
1581 , Opt_TypeFamilies ]
1583 -- -----------------------------------------------------------------------------
1584 -- Parsing the dynamic flags.
1586 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags, [String], [String])
1587 parseDynamicFlags dflags args = do
1588 let ((leftover, errs, warns), dflags')
1589 = runCmdLine (processArgs dynamic_flags args) dflags
1590 when (not (null errs)) $ do
1591 throwDyn (UsageError (unlines errs))
1592 return (dflags', leftover, warns)
1594 type DynP = CmdLineP DynFlags
1596 upd :: (DynFlags -> DynFlags) -> DynP ()
1598 dfs <- getCmdLineState
1599 putCmdLineState $! (f dfs)
1601 --------------------------
1602 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1603 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1605 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1606 -- When you set f, set the ones it implies
1607 -- When you un-set f, however, we don't un-set the things it implies
1608 -- (except for -fno-glasgow-exts, which is treated specially)
1610 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1612 --------------------------
1613 setDumpFlag :: DynFlag -> OptKind DynP
1614 setDumpFlag dump_flag
1615 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1616 | otherwise = NoArg (setDynFlag dump_flag)
1618 -- Whenver we -ddump, switch off the recompilation checker,
1619 -- else you don't see the dump!
1620 -- However, certain dumpy-things are really interested in what's going
1621 -- on during recompilation checking, so in those cases we
1622 -- don't want to turn it off.
1623 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1624 Opt_D_dump_hi_diffs]
1626 setVerboseCore2Core :: DynP ()
1627 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1628 setDynFlag Opt_D_verbose_core2core
1629 upd (\s -> s { shouldDumpSimplPhase = const True })
1631 setDumpSimplPhases :: String -> DynP ()
1632 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1633 upd (\s -> s { shouldDumpSimplPhase = spec })
1635 spec :: SimplifierMode -> Bool
1637 . map (join (&&) . map match . split ':')
1643 join :: (Bool -> Bool -> Bool)
1644 -> [SimplifierMode -> Bool]
1645 -> SimplifierMode -> Bool
1646 join _ [] = const True
1647 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1649 match :: String -> SimplifierMode -> Bool
1650 match "" = const True
1651 match s = case reads s of
1652 [(n,"")] -> phase_num n
1655 phase_num :: Int -> SimplifierMode -> Bool
1656 phase_num n (SimplPhase k _) = n == k
1657 phase_num _ _ = False
1659 phase_name :: String -> SimplifierMode -> Bool
1660 phase_name s SimplGently = s == "gentle"
1661 phase_name s (SimplPhase _ ss) = s `elem` ss
1663 setVerbosity :: Maybe Int -> DynP ()
1664 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1666 addCmdlineHCInclude :: String -> DynP ()
1667 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1669 extraPkgConf_ :: FilePath -> DynP ()
1670 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1672 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1674 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1676 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1678 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1680 setPackageName :: String -> DynFlags -> DynFlags
1682 | Nothing <- unpackPackageId pid
1683 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1685 = \s -> s{ thisPackage = pid }
1687 pid = stringToPackageId p
1689 -- If we're linking a binary, then only targets that produce object
1690 -- code are allowed (requests for other target types are ignored).
1691 setTarget :: HscTarget -> DynP ()
1692 setTarget l = upd set
1695 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1698 -- Changes the target only if we're compiling object code. This is
1699 -- used by -fasm and -fvia-C, which switch from one to the other, but
1700 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1701 -- can be safely used in an OPTIONS_GHC pragma.
1702 setObjTarget :: HscTarget -> DynP ()
1703 setObjTarget l = upd set
1706 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1709 setOptLevel :: Int -> DynFlags -> DynFlags
1710 setOptLevel n dflags
1711 | hscTarget dflags == HscInterpreted && n > 0
1713 -- not in IO any more, oh well:
1714 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1716 = updOptLevel n dflags
1719 -- -Odph is equivalent to
1721 -- -O2 optimise as much as possible
1722 -- -fno-method-sharing sharing specialisation defeats fusion
1724 -- -fdicts-cheap always inline dictionaries
1725 -- -fmax-simplifier-iterations20 this is necessary sometimes
1726 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1728 setDPHOpt :: DynFlags -> DynFlags
1729 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1730 , specConstrThreshold = Nothing
1732 `dopt_set` Opt_DictsCheap
1733 `dopt_unset` Opt_MethodSharing
1735 data DPHBackend = DPHPar
1738 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1739 setDPHBackend backend dflags = dflags { dphBackend = backend }
1742 setMainIs :: String -> DynP ()
1744 | not (null main_fn) && isLower (head main_fn)
1745 -- The arg looked like "Foo.Bar.baz"
1746 = upd $ \d -> d{ mainFunIs = Just main_fn,
1747 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1749 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1750 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1752 | otherwise -- The arg looked like "baz"
1753 = upd $ \d -> d{ mainFunIs = Just arg }
1755 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1757 -----------------------------------------------------------------------------
1758 -- Paths & Libraries
1760 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1762 -- -i on its own deletes the import paths
1763 addImportPath "" = upd (\s -> s{importPaths = []})
1764 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1768 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1771 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1773 addFrameworkPath p =
1774 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1776 #ifndef mingw32_TARGET_OS
1777 split_marker :: Char
1778 split_marker = ':' -- not configurable (ToDo)
1781 splitPathList :: String -> [String]
1782 splitPathList s = filter notNull (splitUp s)
1783 -- empty paths are ignored: there might be a trailing
1784 -- ':' in the initial list, for example. Empty paths can
1785 -- cause confusion when they are translated into -I options
1786 -- for passing to gcc.
1788 #ifndef mingw32_TARGET_OS
1789 splitUp xs = split split_marker xs
1791 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1793 -- That is, if "foo:bar:baz" is used, this interpreted as
1794 -- consisting of three entries, 'foo', 'bar', 'baz'.
1795 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1796 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1798 -- Notice that no attempt is made to fully replace the 'standard'
1799 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1800 -- that this will cause too much breakage for users & ':' will
1801 -- work fine even with DOS paths, if you're not insisting on being silly.
1804 splitUp (x:':':div:xs) | div `elem` dir_markers
1805 = ((x:':':div:p): splitUp rs)
1807 (p,rs) = findNextPath xs
1808 -- we used to check for existence of the path here, but that
1809 -- required the IO monad to be threaded through the command-line
1810 -- parser which is quite inconvenient. The
1811 splitUp xs = cons p (splitUp rs)
1813 (p,rs) = findNextPath xs
1818 -- will be called either when we've consumed nought or the
1819 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1820 -- finding the next split marker.
1822 case break (`elem` split_markers) xs of
1823 (p, _:ds) -> (p, ds)
1826 split_markers :: [Char]
1827 split_markers = [':', ';']
1829 dir_markers :: [Char]
1830 dir_markers = ['/', '\\']
1833 -- -----------------------------------------------------------------------------
1834 -- tmpDir, where we store temporary files.
1836 setTmpDir :: FilePath -> DynFlags -> DynFlags
1837 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1838 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1839 -- seem necessary now --SDM 7/2/2008
1841 -----------------------------------------------------------------------------
1844 setOptHpcDir :: String -> DynP ()
1845 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1847 -----------------------------------------------------------------------------
1848 -- Via-C compilation stuff
1850 -- There are some options that we need to pass to gcc when compiling
1851 -- Haskell code via C, but are only supported by recent versions of
1852 -- gcc. The configure script decides which of these options we need,
1853 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1854 -- read before each via-C compilation. The advantage of having these
1855 -- in a separate file is that the file can be created at install-time
1856 -- depending on the available gcc version, and even re-generated later
1857 -- if gcc is upgraded.
1859 -- The options below are not dependent on the version of gcc, only the
1862 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1863 [String]) -- for registerised HC compilations
1864 machdepCCOpts _dflags
1865 #if alpha_TARGET_ARCH
1867 #ifdef HAVE_THREADED_RTS_SUPPORT
1871 -- For now, to suppress the gcc warning "call-clobbered
1872 -- register used for global register variable", we simply
1873 -- disable all warnings altogether using the -w flag. Oh well.
1875 #elif hppa_TARGET_ARCH
1876 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1877 -- (very nice, but too bad the HP /usr/include files don't agree.)
1878 = ( ["-D_HPUX_SOURCE"], [] )
1880 #elif m68k_TARGET_ARCH
1881 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1882 -- popping of args to routines to be explicit; if we let things
1883 -- be deferred 'til after an STGJUMP, imminent death is certain!
1885 -- -fomit-frame-pointer : *don't*
1886 -- It's better to have a6 completely tied up being a frame pointer
1887 -- rather than let GCC pick random things to do with it.
1888 -- (If we want to steal a6, then we would try to do things
1889 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1890 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1892 #elif i386_TARGET_ARCH
1893 -- -fno-defer-pop : basically the same game as for m68k
1895 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1896 -- the fp (%ebp) for our register maps.
1897 = let n_regs = stolen_x86_regs _dflags
1900 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1901 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1904 "-fomit-frame-pointer",
1905 -- we want -fno-builtin, because when gcc inlines
1906 -- built-in functions like memcpy() it tends to
1907 -- run out of registers, requiring -monly-n-regs
1909 "-DSTOLEN_X86_REGS="++show n_regs ]
1912 #elif ia64_TARGET_ARCH
1913 = ( [], ["-fomit-frame-pointer", "-G0"] )
1915 #elif x86_64_TARGET_ARCH
1916 = ( [], ["-fomit-frame-pointer",
1917 "-fno-asynchronous-unwind-tables",
1918 -- the unwind tables are unnecessary for HC code,
1919 -- and get in the way of -split-objs. Another option
1920 -- would be to throw them away in the mangler, but this
1923 -- calling builtins like strlen() using the FFI can
1924 -- cause gcc to run out of regs, so use the external
1928 #elif sparc_TARGET_ARCH
1930 -- For now, to suppress the gcc warning "call-clobbered
1931 -- register used for global register variable", we simply
1932 -- disable all warnings altogether using the -w flag. Oh well.
1934 #elif powerpc_apple_darwin_TARGET
1936 -- Disable Apple's precompiling preprocessor. It's a great thing
1937 -- for "normal" programs, but it doesn't support register variable
1939 = ( [], ["-no-cpp-precomp"] )
1944 picCCOpts :: DynFlags -> [String]
1946 #if darwin_TARGET_OS
1947 -- Apple prefers to do things the other way round.
1948 -- PIC is on by default.
1949 -- -mdynamic-no-pic:
1950 -- Turn off PIC code generation.
1952 -- Don't generate "common" symbols - these are unwanted
1953 -- in dynamic libraries.
1956 = ["-fno-common", "-D__PIC__"]
1958 = ["-mdynamic-no-pic"]
1959 #elif mingw32_TARGET_OS
1960 -- no -fPIC for Windows
1967 = ["-fPIC", "-D__PIC__"]
1972 -- -----------------------------------------------------------------------------
1976 can_split = cSplitObjs == "YES"
1978 -- -----------------------------------------------------------------------------
1981 compilerInfo :: [(String, String)]
1982 compilerInfo = [("Project name", cProjectName),
1983 ("Project version", cProjectVersion),
1984 ("Booter version", cBooterVersion),
1986 ("Interface file version", cHscIfaceFileVersion),
1987 ("Have interpreter", cGhcWithInterpreter),
1988 ("Object splitting", cSplitObjs),
1989 ("Have native code generator", cGhcWithNativeCodeGen),
1990 ("Support SMP", cGhcWithSMP),
1991 ("Unregisterised", cGhcUnregisterised),
1992 ("Tables next to code", cGhcEnableTablesNextToCode),
1993 ("Win32 DLLs", cEnableWin32DLLs),
1994 ("RTS ways", cGhcRTSWays),
1995 ("Leading underscore", cLeadingUnderscore),
1996 ("Debug on", show debugIsOn)