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 ( stderr, hPutChar )
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_WarnWarningsDeprecations
173 | Opt_WarnDeprecatedFlags
174 | Opt_WarnDodgyImports
177 | Opt_WarnUnrecognisedPragmas
178 | Opt_WarnDodgyForeignImports
181 | Opt_OverlappingInstances
182 | Opt_UndecidableInstances
183 | Opt_IncoherentInstances
184 | Opt_MonomorphismRestriction
186 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
187 | Opt_ForeignFunctionInterface
188 | Opt_UnliftedFFITypes
189 | Opt_PArr -- Syntactic support for parallel arrays
190 | Opt_Arrows -- Arrow-notation syntax
191 | Opt_TemplateHaskell
195 | Opt_ImplicitPrelude
196 | Opt_ScopedTypeVariables
200 | Opt_OverloadedStrings
201 | Opt_DisambiguateRecordFields
202 | Opt_RecordWildCards
207 | Opt_StandaloneDeriving
208 | Opt_DeriveDataTypeable
209 | Opt_TypeSynonymInstances
210 | Opt_FlexibleContexts
211 | Opt_FlexibleInstances
212 | Opt_ConstrainedClassMethods
213 | Opt_MultiParamTypeClasses
214 | Opt_FunctionalDependencies
216 | Opt_PolymorphicComponents
217 | Opt_ExistentialQuantification
221 | Opt_PatternSignatures
222 | Opt_ParallelListComp
223 | Opt_TransformListComp
224 | Opt_GeneralizedNewtypeDeriving
226 | Opt_PostfixOperators
228 | Opt_LiberalTypeSynonyms
231 | Opt_ImpredicativeTypes
234 | Opt_PrintExplicitForalls
239 | Opt_StaticArgumentTransformation
243 | Opt_IgnoreInterfacePragmas
244 | Opt_OmitInterfacePragmas
245 | Opt_DoLambdaEtaExpansion
249 | Opt_UnboxStrictFields
254 | Opt_RegsGraph -- do graph coloring register allocation
255 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
263 | Opt_ExcessPrecision
264 | Opt_ReadUserPackageConf
268 | Opt_HideAllPackages
269 | Opt_PrintBindResult
273 | Opt_BreakOnException
275 | Opt_PrintEvldWithShow
276 | Opt_PrintBindContents
280 | Opt_ConvertToZipCfgAndBack
281 | Opt_AutoLinkPackages
292 data DynFlags = DynFlags {
295 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
296 stgToDo :: Maybe [StgToDo], -- similarly
297 hscTarget :: HscTarget,
298 hscOutName :: String, -- name of the output file
299 extCoreName :: String, -- name of the .core output file
300 verbosity :: Int, -- verbosity level
301 optLevel :: Int, -- optimisation level
302 simplPhases :: Int, -- number of simplifier phases
303 maxSimplIterations :: Int, -- max simplifier iterations
304 shouldDumpSimplPhase :: SimplifierMode -> Bool,
305 ruleCheck :: Maybe String,
307 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
308 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
309 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
311 stolen_x86_regs :: Int,
312 cmdlineHcIncludes :: [String], -- -#includes
313 importPaths :: [FilePath],
315 mainFunIs :: Maybe String,
316 ctxtStkDepth :: Int, -- Typechecker context stack depth
318 dphBackend :: DPHBackend,
320 thisPackage :: PackageId,
323 wayNames :: [WayName], -- way flags from the cmd line
324 buildTag :: String, -- the global "way" (eg. "p" for prof)
325 rtsBuildTag :: String, -- the RTS "way"
328 objectDir :: Maybe String,
329 hiDir :: Maybe String,
330 stubDir :: Maybe String,
336 outputFile :: Maybe String,
337 outputHi :: Maybe String,
338 dynLibLoader :: DynLibLoader,
340 -- | This is set by DriverPipeline.runPipeline based on where
341 -- its output is going.
342 dumpPrefix :: Maybe FilePath,
344 -- | Override the dumpPrefix set by runPipeline.
345 -- Set by -ddump-file-prefix
346 dumpPrefixForce :: Maybe FilePath,
348 includePaths :: [String],
349 libraryPaths :: [String],
350 frameworkPaths :: [String], -- used on darwin only
351 cmdlineFrameworks :: [String], -- ditto
352 tmpDir :: String, -- no trailing '/'
354 ghcUsagePath :: FilePath, -- Filled in by SysTools
355 ghciUsagePath :: FilePath, -- ditto
357 hpcDir :: String, -- ^ path to store the .mix files
359 -- options for particular phases
367 opt_windres :: [String],
369 -- commands for particular phases
371 pgm_P :: (String,[Option]),
373 pgm_c :: (String,[Option]),
374 pgm_m :: (String,[Option]),
375 pgm_s :: (String,[Option]),
376 pgm_a :: (String,[Option]),
377 pgm_l :: (String,[Option]),
378 pgm_dll :: (String,[Option]),
380 pgm_sysman :: String,
381 pgm_windres :: String,
384 depMakefile :: FilePath,
385 depIncludePkgDeps :: Bool,
386 depExcludeMods :: [ModuleName],
387 depSuffixes :: [String],
391 extraPkgConfs :: [FilePath],
392 topDir :: FilePath, -- filled in by SysTools
393 systemPackageConfig :: FilePath, -- ditto
394 -- The -package-conf flags given on the command line, in the order
397 packageFlags :: [PackageFlag],
398 -- The -package and -hide-package flags from the command-line
401 -- NB. do not modify this field, it is calculated by
402 -- Packages.initPackages and Packages.updatePackages.
403 pkgDatabase :: Maybe (UniqFM PackageConfig),
404 pkgState :: PackageState,
410 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
412 haddockOptions :: Maybe String
423 -- | will this target result in an object file on the disk?
424 isObjectTarget :: HscTarget -> Bool
425 isObjectTarget HscC = True
426 isObjectTarget HscAsm = True
427 isObjectTarget _ = False
429 -- | The 'GhcMode' tells us whether we're doing multi-module
430 -- compilation (controlled via the "GHC" API) or one-shot
431 -- (single-module) compilation. This makes a difference primarily to
432 -- the "Finder": in one-shot mode we look for interface files for
433 -- imported modules, but in multi-module mode we look for source files
434 -- in order to check whether they need to be recompiled.
436 = CompManager -- ^ --make, GHCi, etc.
437 | OneShot -- ^ ghc -c Foo.hs
438 | MkDepend -- ^ ghc -M, see Finder for why we need this
441 isOneShot :: GhcMode -> Bool
442 isOneShot OneShot = True
443 isOneShot _other = False
445 -- | What kind of linking to do.
446 data GhcLink -- What to do in the link step, if there is one
447 = NoLink -- Don't link at all
448 | LinkBinary -- Link object code into a binary
449 | LinkInMemory -- Use the in-memory dynamic linker
450 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
453 isNoLink :: GhcLink -> Bool
454 isNoLink NoLink = True
458 = ExposePackage String
460 | IgnorePackage String
463 defaultHscTarget :: HscTarget
464 defaultHscTarget = defaultObjectTarget
466 -- | the 'HscTarget' value corresponding to the default way to create
467 -- object files on the current platform.
468 defaultObjectTarget :: HscTarget
470 | cGhcWithNativeCodeGen == "YES" = HscAsm
475 | Wrapped (Maybe String)
479 initDynFlags :: DynFlags -> IO DynFlags
480 initDynFlags dflags = do
481 -- someday these will be dynamic flags
482 ways <- readIORef v_Ways
483 build_tag <- readIORef v_Build_tag
484 rts_build_tag <- readIORef v_RTS_Build_tag
487 buildTag = build_tag,
488 rtsBuildTag = rts_build_tag
491 defaultDynFlags :: DynFlags
494 ghcMode = CompManager,
495 ghcLink = LinkBinary,
498 hscTarget = defaultHscTarget,
504 maxSimplIterations = 4,
505 shouldDumpSimplPhase = const False,
507 specConstrThreshold = Just 200,
508 specConstrCount = Just 3,
509 liberateCaseThreshold = Just 200,
511 cmdlineHcIncludes = [],
515 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
519 thisPackage = mainPackageId,
525 objectSuf = phaseInputExt StopLn,
526 hcSuf = phaseInputExt HCc,
529 outputFile = Nothing,
531 dynLibLoader = Deployable,
532 dumpPrefix = Nothing,
533 dumpPrefixForce = Nothing,
537 cmdlineFrameworks = [],
538 tmpDir = cDEFAULT_TMPDIR,
555 pkgDatabase = Nothing,
556 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
557 wayNames = panic "defaultDynFlags: No wayNames",
558 buildTag = panic "defaultDynFlags: No buildTag",
559 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
560 -- initSysTools fills all these in
561 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
562 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
563 topDir = panic "defaultDynFlags: No topDir",
564 systemPackageConfig = panic "defaultDynFlags: No systemPackageConfig",
565 pgm_L = panic "defaultDynFlags: No pgm_L",
566 pgm_P = panic "defaultDynFlags: No pgm_P",
567 pgm_F = panic "defaultDynFlags: No pgm_F",
568 pgm_c = panic "defaultDynFlags: No pgm_c",
569 pgm_m = panic "defaultDynFlags: No pgm_m",
570 pgm_s = panic "defaultDynFlags: No pgm_s",
571 pgm_a = panic "defaultDynFlags: No pgm_a",
572 pgm_l = panic "defaultDynFlags: No pgm_l",
573 pgm_dll = panic "defaultDynFlags: No pgm_dll",
574 pgm_T = panic "defaultDynFlags: No pgm_T",
575 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
576 pgm_windres = panic "defaultDynFlags: No pgm_windres",
577 -- end of initSysTools values
579 depMakefile = "Makefile",
580 depIncludePkgDeps = False,
584 -- end of ghc -M values
585 haddockOptions = Nothing,
587 Opt_AutoLinkPackages,
588 Opt_ReadUserPackageConf,
590 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
591 -- behaviour the default, to see if anyone notices
595 Opt_MonomorphismRestriction,
603 Opt_PrintBindContents
605 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
606 -- The default -O0 options
609 log_action = \severity srcSpan style msg ->
611 SevInfo -> printErrs (msg style)
612 SevFatal -> printErrs (msg style)
615 printErrs ((mkLocMessage srcSpan msg) style)
616 -- careful (#2302): printErrs prints in UTF-8, whereas
617 -- converting to string first and using hPutStr would
618 -- just emit the low 8 bits of each unicode char.
624 0 | print errors & warnings only
625 1 | minimal verbosity: print "compiling M ... done." for each module.
626 2 | equivalent to -dshow-passes
627 3 | equivalent to existing "ghc -v"
628 4 | "ghc -v -ddump-most"
629 5 | "ghc -v -ddump-all"
632 dopt :: DynFlag -> DynFlags -> Bool
633 dopt f dflags = f `elem` (flags dflags)
635 dopt_set :: DynFlags -> DynFlag -> DynFlags
636 dopt_set dfs f = dfs{ flags = f : flags dfs }
638 dopt_unset :: DynFlags -> DynFlag -> DynFlags
639 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
641 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
642 getOpts dflags opts = reverse (opts dflags)
643 -- We add to the options from the front, so we need to reverse the list
645 getVerbFlag :: DynFlags -> String
647 | verbosity dflags >= 3 = "-v"
650 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
651 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
652 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
653 addCmdlineFramework, addHaddockOpts
654 :: String -> DynFlags -> DynFlags
655 setOutputFile, setOutputHi, setDumpPrefixForce
656 :: Maybe String -> DynFlags -> DynFlags
658 setObjectDir f d = d{ objectDir = Just f}
659 setHiDir f d = d{ hiDir = Just f}
660 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
661 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
662 -- \#included from the .hc file when compiling with -fvia-C.
664 setObjectSuf f d = d{ objectSuf = f}
665 setHiSuf f d = d{ hiSuf = f}
666 setHcSuf f d = d{ hcSuf = f}
668 setOutputFile f d = d{ outputFile = f}
669 setOutputHi f d = d{ outputHi = f}
671 parseDynLibLoaderMode f d =
673 ("deploy", "") -> d{ dynLibLoader = Deployable }
674 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
675 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
676 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
677 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
678 (_,_) -> error "Unknown dynlib loader"
680 setDumpPrefixForce f d = d { dumpPrefixForce = f}
682 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
683 -- Config.hs should really use Option.
684 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
686 setPgmL f d = d{ pgm_L = f}
687 setPgmF f d = d{ pgm_F = f}
688 setPgmc f d = d{ pgm_c = (f,[])}
689 setPgmm f d = d{ pgm_m = (f,[])}
690 setPgms f d = d{ pgm_s = (f,[])}
691 setPgma f d = d{ pgm_a = (f,[])}
692 setPgml f d = d{ pgm_l = (f,[])}
693 setPgmdll f d = d{ pgm_dll = (f,[])}
694 setPgmwindres f d = d{ pgm_windres = f}
696 addOptL f d = d{ opt_L = f : opt_L d}
697 addOptP f d = d{ opt_P = f : opt_P d}
698 addOptF f d = d{ opt_F = f : opt_F d}
699 addOptc f d = d{ opt_c = f : opt_c d}
700 addOptm f d = d{ opt_m = f : opt_m d}
701 addOpta f d = d{ opt_a = f : opt_a d}
702 addOptl f d = d{ opt_l = f : opt_l d}
703 addOptwindres f d = d{ opt_windres = f : opt_windres d}
705 setDepMakefile :: FilePath -> DynFlags -> DynFlags
706 setDepMakefile f d = d { depMakefile = deOptDep f }
708 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
709 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
711 addDepExcludeMod :: String -> DynFlags -> DynFlags
713 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
715 addDepSuffix :: FilePath -> DynFlags -> DynFlags
716 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
718 setDepWarnings :: Bool -> DynFlags -> DynFlags
719 setDepWarnings b d = d { depWarnings = b }
722 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
723 -- we need to strip the "-optdep" off of the arg
724 deOptDep :: String -> String
725 deOptDep x = case maybePrefixMatch "-optdep" x of
729 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
731 addHaddockOpts f d = d{ haddockOptions = Just f}
733 -- -----------------------------------------------------------------------------
734 -- Command-line options
736 -- When invoking external tools as part of the compilation pipeline, we
737 -- pass these a sequence of options on the command-line. Rather than
738 -- just using a list of Strings, we use a type that allows us to distinguish
739 -- between filepaths and 'other stuff'. [The reason being, of course, that
740 -- this type gives us a handle on transforming filenames, and filenames only,
741 -- to whatever format they're expected to be on a particular platform.]
744 = FileOption -- an entry that _contains_ filename(s) / filepaths.
745 String -- a non-filepath prefix that shouldn't be
746 -- transformed (e.g., "/out=")
747 String -- the filepath/filename portion
750 -----------------------------------------------------------------------------
751 -- Setting the optimisation level
753 updOptLevel :: Int -> DynFlags -> DynFlags
754 -- Set dynflags appropriate to the optimisation level
756 = dfs2{ optLevel = final_n }
758 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
759 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
760 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
762 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
763 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
765 optLevelFlags :: [([Int], DynFlag)]
767 = [ ([0], Opt_IgnoreInterfacePragmas)
768 , ([0], Opt_OmitInterfacePragmas)
770 , ([1,2], Opt_IgnoreAsserts)
771 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
773 , ([1,2], Opt_DoEtaReduction)
774 , ([1,2], Opt_CaseMerge)
775 , ([1,2], Opt_Strictness)
777 , ([1,2], Opt_FullLaziness)
779 , ([2], Opt_LiberateCase)
780 , ([2], Opt_SpecConstr)
781 , ([2], Opt_StaticArgumentTransformation)
783 , ([0,1,2], Opt_DoLambdaEtaExpansion)
784 -- This one is important for a tiresome reason:
785 -- we want to make sure that the bindings for data
786 -- constructors are eta-expanded. This is probably
787 -- a good thing anyway, but it seems fragile.
790 -- -----------------------------------------------------------------------------
791 -- Standard sets of warning options
793 standardWarnings :: [DynFlag]
795 = [ Opt_WarnWarningsDeprecations,
796 Opt_WarnDeprecatedFlags,
797 Opt_WarnUnrecognisedPragmas,
798 Opt_WarnOverlappingPatterns,
799 Opt_WarnMissingFields,
800 Opt_WarnMissingMethods,
801 Opt_WarnDuplicateExports,
802 Opt_WarnDodgyForeignImports
805 minusWOpts :: [DynFlag]
807 = standardWarnings ++
808 [ Opt_WarnUnusedBinds,
809 Opt_WarnUnusedMatches,
810 Opt_WarnUnusedImports,
811 Opt_WarnIncompletePatterns,
815 minusWallOpts :: [DynFlag]
818 [ Opt_WarnTypeDefaults,
819 Opt_WarnNameShadowing,
825 -- minuswRemovesOpts should be every warning option
826 minuswRemovesOpts :: [DynFlag]
829 [Opt_WarnImplicitPrelude,
830 Opt_WarnIncompletePatternsRecUpd,
831 Opt_WarnSimplePatterns,
832 Opt_WarnMonomorphism,
833 Opt_WarnUnrecognisedPragmas,
837 -- -----------------------------------------------------------------------------
838 -- CoreToDo: abstraction of core-to-core passes to run.
840 data CoreToDo -- These are diff core-to-core passes,
841 -- which may be invoked in any order,
842 -- as many times as you like.
844 = CoreDoSimplify -- The core-to-core simplifier.
847 -- Each run of the simplifier can take a different
848 -- set of simplifier-specific flags.
850 | CoreDoFloatOutwards FloatOutSwitches
855 | CoreDoWorkerWrapper
858 | CoreDoOldStrictness
861 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
862 -- matching this string
863 | CoreDoVectorisation DPHBackend
864 | CoreDoNothing -- Useful when building up
865 | CoreDoPasses [CoreToDo] -- lists of these things
867 data SimplifierMode -- See comments in SimplMonad
869 | SimplPhase Int [String]
871 data SimplifierSwitch
872 = MaxSimplifierIterations Int
875 data FloatOutSwitches
876 = FloatOutSw Bool -- True <=> float lambdas to top level
877 Bool -- True <=> float constants to top level,
878 -- even if they do not escape a lambda
881 -- The core-to-core pass ordering is derived from the DynFlags:
882 runWhen :: Bool -> CoreToDo -> CoreToDo
883 runWhen True do_this = do_this
884 runWhen False _ = CoreDoNothing
886 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
887 runMaybe (Just x) f = f x
888 runMaybe Nothing _ = CoreDoNothing
890 getCoreToDo :: DynFlags -> [CoreToDo]
892 | Just todo <- coreToDo dflags = todo -- set explicitly by user
893 | otherwise = core_todo
895 opt_level = optLevel dflags
896 phases = simplPhases dflags
897 max_iter = maxSimplIterations dflags
898 strictness = dopt Opt_Strictness dflags
899 full_laziness = dopt Opt_FullLaziness dflags
900 cse = dopt Opt_CSE dflags
901 spec_constr = dopt Opt_SpecConstr dflags
902 liberate_case = dopt Opt_LiberateCase dflags
903 rule_check = ruleCheck dflags
904 static_args = dopt Opt_StaticArgumentTransformation dflags
906 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
908 simpl_phase phase names iter
910 [ CoreDoSimplify (SimplPhase phase names) [
911 MaxSimplifierIterations iter
913 maybe_rule_check phase
917 = runWhen (dopt Opt_Vectorise dflags)
918 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
921 -- By default, we have 2 phases before phase 0.
923 -- Want to run with inline phase 2 after the specialiser to give
924 -- maximum chance for fusion to work before we inline build/augment
925 -- in phase 1. This made a difference in 'ansi' where an
926 -- overloaded function wasn't inlined till too late.
928 -- Need phase 1 so that build/augment get
929 -- inlined. I found that spectral/hartel/genfft lost some useful
930 -- strictness in the function sumcode' if augment is not inlined
931 -- before strictness analysis runs
932 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
933 | phase <- [phases, phases-1 .. 1] ]
936 -- initial simplify: mk specialiser happy: minimum effort please
937 simpl_gently = CoreDoSimplify SimplGently [
939 -- Don't inline anything till full laziness has bitten
940 -- In particular, inlining wrappers inhibits floating
941 -- e.g. ...(case f x of ...)...
942 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
943 -- ==> ...(case x of I# x# -> case fw x# of ...)...
944 -- and now the redex (f x) isn't floatable any more
945 -- Similarly, don't apply any rules until after full
946 -- laziness. Notably, list fusion can prevent floating.
948 NoCaseOfCase, -- Don't do case-of-case transformations.
949 -- This makes full laziness work better
950 MaxSimplifierIterations max_iter
954 if opt_level == 0 then
956 simpl_phase 0 ["final"] max_iter]
957 else {- opt_level >= 1 -} [
959 -- We want to do the static argument transform before full laziness as it
960 -- may expose extra opportunities to float things outwards. However, to fix
961 -- up the output of the transformation we need at do at least one simplify
962 -- after this before anything else
963 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
965 -- We run vectorisation here for now, but we might also try to run
969 -- initial simplify: mk specialiser happy: minimum effort please
972 -- Specialisation is best done before full laziness
973 -- so that overloaded functions have all their dictionary lambdas manifest
976 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
982 -- Phase 0: allow all Ids to be inlined now
983 -- This gets foldr inlined before strictness analysis
985 -- At least 3 iterations because otherwise we land up with
986 -- huge dead expressions because of an infelicity in the
988 -- let k = BIG in foldr k z xs
989 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
990 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
992 simpl_phase 0 ["main"] (max max_iter 3),
995 #ifdef OLD_STRICTNESS
998 runWhen strictness (CoreDoPasses [
1000 CoreDoWorkerWrapper,
1002 simpl_phase 0 ["post-worker-wrapper"] max_iter
1005 runWhen full_laziness
1006 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1007 True)), -- Float constants
1008 -- nofib/spectral/hartel/wang doubles in speed if you
1009 -- do full laziness late in the day. It only happens
1010 -- after fusion and other stuff, so the early pass doesn't
1011 -- catch it. For the record, the redex is
1012 -- f_el22 (f_el21 r_midblock)
1015 runWhen cse CoreCSE,
1016 -- We want CSE to follow the final full-laziness pass, because it may
1017 -- succeed in commoning up things floated out by full laziness.
1018 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1024 -- Case-liberation for -O2. This should be after
1025 -- strictness analysis and the simplification which follows it.
1026 runWhen liberate_case (CoreDoPasses [
1028 simpl_phase 0 ["post-liberate-case"] max_iter
1029 ]), -- Run the simplifier after LiberateCase to vastly
1030 -- reduce the possiblility of shadowing
1031 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1033 runWhen spec_constr CoreDoSpecConstr,
1037 -- Final clean-up simplification:
1038 simpl_phase 0 ["final"] max_iter
1041 -- -----------------------------------------------------------------------------
1042 -- StgToDo: abstraction of stg-to-stg passes to run.
1045 = StgDoMassageForProfiling -- should be (next to) last
1046 -- There's also setStgVarInfo, but its absolute "lastness"
1047 -- is so critical that it is hardwired in (no flag).
1050 getStgToDo :: DynFlags -> [StgToDo]
1052 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1055 stg_stats = dopt Opt_StgStats dflags
1057 todo1 = if stg_stats then [D_stg_stats] else []
1059 todo2 | WayProf `elem` wayNames dflags
1060 = StgDoMassageForProfiling : todo1
1064 -- -----------------------------------------------------------------------------
1067 allFlags :: [String]
1068 allFlags = map ('-':) $
1069 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1070 map ("fno-"++) flags ++
1071 map ("f"++) flags ++
1072 map ("X"++) supportedLanguages ++
1073 map ("XNo"++) supportedLanguages
1074 where ok (PrefixPred _ _) = False
1076 flags = [ name | (name, _, _) <- fFlags ]
1078 dynamic_flags :: [Flag DynP]
1080 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1081 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1082 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1083 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1084 , Flag "v" (OptIntSuffix setVerbosity) Supported
1086 ------- Specific phases --------------------------------------------
1087 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1088 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1089 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1090 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1091 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1092 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1093 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1094 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1095 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1096 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1098 , Flag "optL" (HasArg (upd . addOptL)) Supported
1099 , Flag "optP" (HasArg (upd . addOptP)) Supported
1100 , Flag "optF" (HasArg (upd . addOptF)) Supported
1101 , Flag "optc" (HasArg (upd . addOptc)) Supported
1102 , Flag "optm" (HasArg (upd . addOptm)) Supported
1103 , Flag "opta" (HasArg (upd . addOpta)) Supported
1104 , Flag "optl" (HasArg (upd . addOptl)) Supported
1105 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1108 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1111 -------- ghc -M -----------------------------------------------------
1112 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1113 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1114 (Deprecated "Use -dep-suffix instead")
1115 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1116 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1117 (Deprecated "Use -dep-makefile instead")
1118 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1119 (Deprecated "-optdep-w doesn't do anything")
1120 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1121 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1122 (Deprecated "Use -include-pkg-deps instead")
1123 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1124 (Deprecated "Use -include-pkg-deps instead")
1125 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1126 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1127 (Deprecated "Use -exclude-module instead")
1128 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1129 (Deprecated "Use -exclude-module instead")
1131 -------- Linking ----------------------------------------------------
1132 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1134 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1135 (Deprecated "Use -c instead")
1136 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1138 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1141 ------- Libraries ---------------------------------------------------
1142 , Flag "L" (Prefix addLibraryPath ) Supported
1143 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1145 ------- Frameworks --------------------------------------------------
1146 -- -framework-path should really be -F ...
1147 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1148 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1150 ------- Output Redirection ------------------------------------------
1151 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1152 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1153 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1154 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1155 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1156 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1157 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1158 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1159 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1160 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1163 ------- Keeping temporary files -------------------------------------
1164 -- These can be singular (think ghc -c) or plural (think ghc --make)
1165 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1166 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1167 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1168 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1169 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1170 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1171 -- This only makes sense as plural
1172 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1174 ------- Miscellaneous ----------------------------------------------
1175 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1176 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1177 , Flag "main-is" (SepArg setMainIs ) Supported
1178 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1179 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1180 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1182 ------- recompilation checker --------------------------------------
1183 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1184 (Deprecated "Use -fno-force-recomp instead")
1185 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1186 (Deprecated "Use -fforce-recomp instead")
1188 ------- Packages ----------------------------------------------------
1189 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1190 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1192 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1193 , Flag "package" (HasArg exposePackage) Supported
1194 , Flag "hide-package" (HasArg hidePackage) Supported
1195 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1197 , Flag "ignore-package" (HasArg ignorePackage)
1199 , Flag "syslib" (HasArg exposePackage)
1200 (Deprecated "Use -package instead")
1202 ------ HsCpp opts ---------------------------------------------------
1203 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1204 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1206 ------- Include/Import Paths ----------------------------------------
1207 , Flag "I" (Prefix addIncludePath) Supported
1208 , Flag "i" (OptPrefix addImportPath ) Supported
1210 ------ Debugging ----------------------------------------------------
1211 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1213 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1215 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1217 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1219 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1221 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1223 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1225 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1227 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1229 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1231 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1233 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1235 , Flag "ddump-asm-regalloc-stages"
1236 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1238 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1240 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1242 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1244 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1246 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1248 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1250 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1252 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1254 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1256 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1258 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1260 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1262 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1264 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1266 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1268 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1270 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1272 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1274 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1276 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1278 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1280 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1282 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1284 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1286 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1288 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1290 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1292 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1294 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1296 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1298 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1300 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1302 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1304 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1306 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1308 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1310 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1312 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1314 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1316 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1318 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1320 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1323 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1325 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1327 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1329 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1331 , Flag "dshow-passes"
1332 (NoArg (do setDynFlag Opt_ForceRecomp
1333 setVerbosity (Just 2)))
1335 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1338 ------ Machine dependant (-m<blah>) stuff ---------------------------
1340 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1342 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1344 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1347 ------ Warning opts -------------------------------------------------
1348 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1350 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1352 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1354 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1356 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1357 (Deprecated "Use -w instead")
1358 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1361 ------ Optimisation flags ------------------------------------------
1362 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1363 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1364 (Deprecated "Use -O0 instead")
1365 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1366 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1368 -- If the number is missing, use 1
1370 , Flag "fsimplifier-phases"
1371 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1373 , Flag "fmax-simplifier-iterations"
1374 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1377 , Flag "fspec-constr-threshold"
1378 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1380 , Flag "fno-spec-constr-threshold"
1381 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1383 , Flag "fspec-constr-count"
1384 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1386 , Flag "fno-spec-constr-count"
1387 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1389 , Flag "fliberate-case-threshold"
1390 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1392 , Flag "fno-liberate-case-threshold"
1393 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1396 , Flag "frule-check"
1397 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1399 , Flag "fcontext-stack"
1400 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1403 ------ DPH flags ----------------------------------------------------
1406 (NoArg (upd (setDPHBackend DPHSeq)))
1409 (NoArg (upd (setDPHBackend DPHPar)))
1412 ------ Compiler flags -----------------------------------------------
1414 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1415 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1416 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1418 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1419 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1420 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1422 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1424 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1427 ++ map (mkFlag True "f" setDynFlag ) fFlags
1428 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1429 ++ map (mkFlag True "X" setDynFlag ) xFlags
1430 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1432 mkFlag :: Bool -- True => turn it on, False => turn it off
1434 -> (DynFlag -> DynP ())
1435 -> (String, DynFlag, Bool -> Deprecated)
1437 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1438 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1440 deprecatedForLanguage :: String -> Bool -> Deprecated
1441 deprecatedForLanguage lang turnOn =
1442 Deprecated ("Use the " ++ prefix ++ lang ++ " language instead")
1443 where prefix = if turnOn then "" else "No"
1445 -- these -f<blah> flags can all be reversed with -fno-<blah>
1447 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1449 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1450 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1451 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1452 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1453 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1454 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1455 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1456 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1457 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1458 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1459 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1460 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1461 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1462 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1463 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1464 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1465 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1466 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1467 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1468 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1469 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1470 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1471 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1472 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1473 ( "strictness", Opt_Strictness, const Supported ),
1474 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1475 ( "full-laziness", Opt_FullLaziness, const Supported ),
1476 ( "liberate-case", Opt_LiberateCase, const Supported ),
1477 ( "spec-constr", Opt_SpecConstr, const Supported ),
1478 ( "cse", Opt_CSE, const Supported ),
1479 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1480 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1481 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1482 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1483 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1484 ( "case-merge", Opt_CaseMerge, const Supported ),
1485 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1486 ( "method-sharing", Opt_MethodSharing, const Supported ),
1487 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1488 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1489 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1490 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1491 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1492 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1493 ( "rewrite-rules", Opt_RewriteRules, const Supported ),
1494 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1495 ( "break-on-error", Opt_BreakOnError, const Supported ),
1496 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1497 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1498 ( "run-cps", Opt_RunCPSZ, const Supported ),
1499 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1500 ( "vectorise", Opt_Vectorise, const Supported ),
1501 ( "regs-graph", Opt_RegsGraph, const Supported ),
1502 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1503 ( "th", Opt_TemplateHaskell,
1504 deprecatedForLanguage "TemplateHaskell" ),
1505 ( "fi", Opt_ForeignFunctionInterface,
1506 deprecatedForLanguage "ForeignFunctionInterface" ),
1507 ( "ffi", Opt_ForeignFunctionInterface,
1508 deprecatedForLanguage "ForeignFunctionInterface" ),
1509 ( "arrows", Opt_Arrows,
1510 deprecatedForLanguage "Arrows" ),
1511 ( "generics", Opt_Generics,
1512 deprecatedForLanguage "Generics" ),
1513 ( "implicit-prelude", Opt_ImplicitPrelude,
1514 deprecatedForLanguage "ImplicitPrelude" ),
1515 ( "bang-patterns", Opt_BangPatterns,
1516 deprecatedForLanguage "BangPatterns" ),
1517 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1518 deprecatedForLanguage "MonomorphismRestriction" ),
1519 ( "mono-pat-binds", Opt_MonoPatBinds,
1520 deprecatedForLanguage "MonoPatBinds" ),
1521 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1522 deprecatedForLanguage "ExtendedDefaultRules" ),
1523 ( "implicit-params", Opt_ImplicitParams,
1524 deprecatedForLanguage "ImplicitParams" ),
1525 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1526 deprecatedForLanguage "ScopedTypeVariables" ),
1528 deprecatedForLanguage "PArr" ),
1529 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1530 deprecatedForLanguage "OverlappingInstances" ),
1531 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1532 deprecatedForLanguage "UndecidableInstances" ),
1533 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1534 deprecatedForLanguage "IncoherentInstances" ),
1535 ( "gen-manifest", Opt_GenManifest, const Supported ),
1536 ( "embed-manifest", Opt_EmbedManifest, const Supported )
1539 supportedLanguages :: [String]
1540 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1542 -- This may contain duplicates
1543 languageOptions :: [DynFlag]
1544 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1546 -- These -X<blah> flags can all be reversed with -XNo<blah>
1547 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1549 ( "CPP", Opt_Cpp, const Supported ),
1550 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1551 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1552 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1553 ( "MagicHash", Opt_MagicHash, const Supported ),
1554 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1555 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1556 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1557 ( "PatternSignatures", Opt_PatternSignatures, const Supported ),
1558 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1559 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1560 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1561 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1562 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1563 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1564 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1565 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1566 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1567 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1568 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1569 ( "Arrows", Opt_Arrows, const Supported ),
1570 ( "PArr", Opt_PArr, const Supported ),
1571 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1572 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1573 ( "Generics", Opt_Generics, const Supported ),
1575 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1576 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1577 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1578 ( "RecordPuns", Opt_RecordPuns,
1579 deprecatedForLanguage "NamedFieldPuns" ),
1580 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1581 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1582 ( "GADTs", Opt_GADTs, const Supported ),
1583 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1584 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1585 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1587 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1588 -- On by default (which is not strictly H98):
1589 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1590 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1591 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1592 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1593 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1594 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1595 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1596 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1597 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1598 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1599 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1600 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1601 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1602 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1603 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1604 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1605 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1606 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported )
1609 impliedFlags :: [(DynFlag, [DynFlag])]
1611 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1612 -- be completely rigid for GADTs
1613 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1614 -- Note [Scoped tyvars] in TcBinds
1617 glasgowExtsFlags :: [DynFlag]
1618 glasgowExtsFlags = [
1619 Opt_PrintExplicitForalls
1620 , Opt_ForeignFunctionInterface
1621 , Opt_UnliftedFFITypes
1623 , Opt_ImplicitParams
1624 , Opt_ScopedTypeVariables
1626 , Opt_TypeSynonymInstances
1627 , Opt_StandaloneDeriving
1628 , Opt_DeriveDataTypeable
1629 , Opt_FlexibleContexts
1630 , Opt_FlexibleInstances
1631 , Opt_ConstrainedClassMethods
1632 , Opt_MultiParamTypeClasses
1633 , Opt_FunctionalDependencies
1635 , Opt_PolymorphicComponents
1636 , Opt_ExistentialQuantification
1638 , Opt_PostfixOperators
1640 , Opt_LiberalTypeSynonyms
1642 , Opt_ImpredicativeTypes
1645 , Opt_ParallelListComp
1646 , Opt_EmptyDataDecls
1647 , Opt_KindSignatures
1648 , Opt_PatternSignatures
1649 , Opt_GeneralizedNewtypeDeriving
1650 , Opt_TypeFamilies ]
1652 -- -----------------------------------------------------------------------------
1653 -- Parsing the dynamic flags.
1655 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags, [String], [String])
1656 parseDynamicFlags dflags args = do
1657 -- XXX Legacy support code
1658 -- We used to accept things like
1659 -- optdep-f -optdepdepend
1660 -- optdep-f -optdep depend
1661 -- optdep -f -optdepdepend
1662 -- optdep -f -optdep depend
1663 -- but the spaces trip up proper argument handling. So get rid of them.
1664 let f ("-optdep" : x : xs) = ("-optdep" ++ x) : f xs
1665 f (x : xs) = x : f xs
1668 let ((leftover, errs, warns), dflags')
1669 = runCmdLine (processArgs dynamic_flags args') dflags
1670 when (not (null errs)) $ do
1671 throwDyn (UsageError (unlines errs))
1672 return (dflags', leftover, warns)
1674 type DynP = CmdLineP DynFlags
1676 upd :: (DynFlags -> DynFlags) -> DynP ()
1678 dfs <- getCmdLineState
1679 putCmdLineState $! (f dfs)
1681 --------------------------
1682 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1683 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1685 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1686 -- When you set f, set the ones it implies
1687 -- When you un-set f, however, we don't un-set the things it implies
1688 -- (except for -fno-glasgow-exts, which is treated specially)
1690 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1692 --------------------------
1693 setDumpFlag :: DynFlag -> OptKind DynP
1694 setDumpFlag dump_flag
1695 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1696 | otherwise = NoArg (setDynFlag dump_flag)
1698 -- Whenver we -ddump, switch off the recompilation checker,
1699 -- else you don't see the dump!
1700 -- However, certain dumpy-things are really interested in what's going
1701 -- on during recompilation checking, so in those cases we
1702 -- don't want to turn it off.
1703 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1704 Opt_D_dump_hi_diffs]
1706 setVerboseCore2Core :: DynP ()
1707 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1708 setDynFlag Opt_D_verbose_core2core
1709 upd (\s -> s { shouldDumpSimplPhase = const True })
1711 setDumpSimplPhases :: String -> DynP ()
1712 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1713 upd (\s -> s { shouldDumpSimplPhase = spec })
1715 spec :: SimplifierMode -> Bool
1717 . map (join (&&) . map match . split ':')
1723 join :: (Bool -> Bool -> Bool)
1724 -> [SimplifierMode -> Bool]
1725 -> SimplifierMode -> Bool
1726 join _ [] = const True
1727 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1729 match :: String -> SimplifierMode -> Bool
1730 match "" = const True
1731 match s = case reads s of
1732 [(n,"")] -> phase_num n
1735 phase_num :: Int -> SimplifierMode -> Bool
1736 phase_num n (SimplPhase k _) = n == k
1737 phase_num _ _ = False
1739 phase_name :: String -> SimplifierMode -> Bool
1740 phase_name s SimplGently = s == "gentle"
1741 phase_name s (SimplPhase _ ss) = s `elem` ss
1743 setVerbosity :: Maybe Int -> DynP ()
1744 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1746 addCmdlineHCInclude :: String -> DynP ()
1747 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1749 extraPkgConf_ :: FilePath -> DynP ()
1750 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1752 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1754 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1756 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1758 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1760 setPackageName :: String -> DynFlags -> DynFlags
1762 | Nothing <- unpackPackageId pid
1763 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1765 = \s -> s{ thisPackage = pid }
1767 pid = stringToPackageId p
1769 -- If we're linking a binary, then only targets that produce object
1770 -- code are allowed (requests for other target types are ignored).
1771 setTarget :: HscTarget -> DynP ()
1772 setTarget l = upd set
1775 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1778 -- Changes the target only if we're compiling object code. This is
1779 -- used by -fasm and -fvia-C, which switch from one to the other, but
1780 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1781 -- can be safely used in an OPTIONS_GHC pragma.
1782 setObjTarget :: HscTarget -> DynP ()
1783 setObjTarget l = upd set
1786 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1789 setOptLevel :: Int -> DynFlags -> DynFlags
1790 setOptLevel n dflags
1791 | hscTarget dflags == HscInterpreted && n > 0
1793 -- not in IO any more, oh well:
1794 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1796 = updOptLevel n dflags
1799 -- -Odph is equivalent to
1801 -- -O2 optimise as much as possible
1802 -- -fno-method-sharing sharing specialisation defeats fusion
1804 -- -fdicts-cheap always inline dictionaries
1805 -- -fmax-simplifier-iterations20 this is necessary sometimes
1806 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1808 setDPHOpt :: DynFlags -> DynFlags
1809 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1810 , specConstrThreshold = Nothing
1812 `dopt_set` Opt_DictsCheap
1813 `dopt_unset` Opt_MethodSharing
1815 data DPHBackend = DPHPar
1818 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1819 setDPHBackend backend dflags = dflags { dphBackend = backend }
1822 setMainIs :: String -> DynP ()
1824 | not (null main_fn) && isLower (head main_fn)
1825 -- The arg looked like "Foo.Bar.baz"
1826 = upd $ \d -> d{ mainFunIs = Just main_fn,
1827 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1829 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1830 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1832 | otherwise -- The arg looked like "baz"
1833 = upd $ \d -> d{ mainFunIs = Just arg }
1835 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1837 -----------------------------------------------------------------------------
1838 -- Paths & Libraries
1840 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1842 -- -i on its own deletes the import paths
1843 addImportPath "" = upd (\s -> s{importPaths = []})
1844 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1848 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1851 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1853 addFrameworkPath p =
1854 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1856 #ifndef mingw32_TARGET_OS
1857 split_marker :: Char
1858 split_marker = ':' -- not configurable (ToDo)
1861 splitPathList :: String -> [String]
1862 splitPathList s = filter notNull (splitUp s)
1863 -- empty paths are ignored: there might be a trailing
1864 -- ':' in the initial list, for example. Empty paths can
1865 -- cause confusion when they are translated into -I options
1866 -- for passing to gcc.
1868 #ifndef mingw32_TARGET_OS
1869 splitUp xs = split split_marker xs
1871 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1873 -- That is, if "foo:bar:baz" is used, this interpreted as
1874 -- consisting of three entries, 'foo', 'bar', 'baz'.
1875 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1876 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1878 -- Notice that no attempt is made to fully replace the 'standard'
1879 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1880 -- that this will cause too much breakage for users & ':' will
1881 -- work fine even with DOS paths, if you're not insisting on being silly.
1884 splitUp (x:':':div:xs) | div `elem` dir_markers
1885 = ((x:':':div:p): splitUp rs)
1887 (p,rs) = findNextPath xs
1888 -- we used to check for existence of the path here, but that
1889 -- required the IO monad to be threaded through the command-line
1890 -- parser which is quite inconvenient. The
1891 splitUp xs = cons p (splitUp rs)
1893 (p,rs) = findNextPath xs
1898 -- will be called either when we've consumed nought or the
1899 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1900 -- finding the next split marker.
1902 case break (`elem` split_markers) xs of
1903 (p, _:ds) -> (p, ds)
1906 split_markers :: [Char]
1907 split_markers = [':', ';']
1909 dir_markers :: [Char]
1910 dir_markers = ['/', '\\']
1913 -- -----------------------------------------------------------------------------
1914 -- tmpDir, where we store temporary files.
1916 setTmpDir :: FilePath -> DynFlags -> DynFlags
1917 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1918 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1919 -- seem necessary now --SDM 7/2/2008
1921 -----------------------------------------------------------------------------
1924 setOptHpcDir :: String -> DynP ()
1925 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1927 -----------------------------------------------------------------------------
1928 -- Via-C compilation stuff
1930 -- There are some options that we need to pass to gcc when compiling
1931 -- Haskell code via C, but are only supported by recent versions of
1932 -- gcc. The configure script decides which of these options we need,
1933 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1934 -- read before each via-C compilation. The advantage of having these
1935 -- in a separate file is that the file can be created at install-time
1936 -- depending on the available gcc version, and even re-generated later
1937 -- if gcc is upgraded.
1939 -- The options below are not dependent on the version of gcc, only the
1942 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1943 [String]) -- for registerised HC compilations
1944 machdepCCOpts _dflags
1945 #if alpha_TARGET_ARCH
1947 #ifdef HAVE_THREADED_RTS_SUPPORT
1951 -- For now, to suppress the gcc warning "call-clobbered
1952 -- register used for global register variable", we simply
1953 -- disable all warnings altogether using the -w flag. Oh well.
1955 #elif hppa_TARGET_ARCH
1956 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1957 -- (very nice, but too bad the HP /usr/include files don't agree.)
1958 = ( ["-D_HPUX_SOURCE"], [] )
1960 #elif m68k_TARGET_ARCH
1961 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1962 -- popping of args to routines to be explicit; if we let things
1963 -- be deferred 'til after an STGJUMP, imminent death is certain!
1965 -- -fomit-frame-pointer : *don't*
1966 -- It's better to have a6 completely tied up being a frame pointer
1967 -- rather than let GCC pick random things to do with it.
1968 -- (If we want to steal a6, then we would try to do things
1969 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1970 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1972 #elif i386_TARGET_ARCH
1973 -- -fno-defer-pop : basically the same game as for m68k
1975 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1976 -- the fp (%ebp) for our register maps.
1977 = let n_regs = stolen_x86_regs _dflags
1980 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1983 "-fomit-frame-pointer",
1984 -- we want -fno-builtin, because when gcc inlines
1985 -- built-in functions like memcpy() it tends to
1986 -- run out of registers, requiring -monly-n-regs
1988 "-DSTOLEN_X86_REGS="++show n_regs ]
1991 #elif ia64_TARGET_ARCH
1992 = ( [], ["-fomit-frame-pointer", "-G0"] )
1994 #elif x86_64_TARGET_ARCH
1995 = ( [], ["-fomit-frame-pointer",
1996 "-fno-asynchronous-unwind-tables",
1997 -- the unwind tables are unnecessary for HC code,
1998 -- and get in the way of -split-objs. Another option
1999 -- would be to throw them away in the mangler, but this
2002 -- calling builtins like strlen() using the FFI can
2003 -- cause gcc to run out of regs, so use the external
2007 #elif sparc_TARGET_ARCH
2009 -- For now, to suppress the gcc warning "call-clobbered
2010 -- register used for global register variable", we simply
2011 -- disable all warnings altogether using the -w flag. Oh well.
2013 #elif powerpc_apple_darwin_TARGET
2015 -- Disable Apple's precompiling preprocessor. It's a great thing
2016 -- for "normal" programs, but it doesn't support register variable
2018 = ( [], ["-no-cpp-precomp"] )
2023 picCCOpts :: DynFlags -> [String]
2025 #if darwin_TARGET_OS
2026 -- Apple prefers to do things the other way round.
2027 -- PIC is on by default.
2028 -- -mdynamic-no-pic:
2029 -- Turn off PIC code generation.
2031 -- Don't generate "common" symbols - these are unwanted
2032 -- in dynamic libraries.
2035 = ["-fno-common", "-D__PIC__"]
2037 = ["-mdynamic-no-pic"]
2038 #elif mingw32_TARGET_OS
2039 -- no -fPIC for Windows
2046 = ["-fPIC", "-D__PIC__"]
2051 -- -----------------------------------------------------------------------------
2055 can_split = cSplitObjs == "YES"
2057 -- -----------------------------------------------------------------------------
2060 compilerInfo :: [(String, String)]
2061 compilerInfo = [("Project name", cProjectName),
2062 ("Project version", cProjectVersion),
2063 ("Booter version", cBooterVersion),
2065 ("Interface file version", cHscIfaceFileVersion),
2066 ("Have interpreter", cGhcWithInterpreter),
2067 ("Object splitting", cSplitObjs),
2068 ("Have native code generator", cGhcWithNativeCodeGen),
2069 ("Support SMP", cGhcWithSMP),
2070 ("Unregisterised", cGhcUnregisterised),
2071 ("Tables next to code", cGhcEnableTablesNextToCode),
2072 ("Win32 DLLs", cEnableWin32DLLs),
2073 ("RTS ways", cGhcRTSWays),
2074 ("Leading underscore", cLeadingUnderscore),
2075 ("Debug on", show debugIsOn)