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_WarnDodgyForeignImports
180 | Opt_OverlappingInstances
181 | Opt_UndecidableInstances
182 | Opt_IncoherentInstances
183 | Opt_MonomorphismRestriction
185 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
186 | Opt_ForeignFunctionInterface
187 | Opt_UnliftedFFITypes
188 | Opt_PArr -- Syntactic support for parallel arrays
189 | Opt_Arrows -- Arrow-notation syntax
190 | Opt_TemplateHaskell
194 | Opt_ImplicitPrelude
195 | Opt_ScopedTypeVariables
199 | Opt_OverloadedStrings
200 | Opt_DisambiguateRecordFields
201 | Opt_RecordWildCards
206 | Opt_StandaloneDeriving
207 | Opt_DeriveDataTypeable
208 | Opt_TypeSynonymInstances
209 | Opt_FlexibleContexts
210 | Opt_FlexibleInstances
211 | Opt_ConstrainedClassMethods
212 | Opt_MultiParamTypeClasses
213 | Opt_FunctionalDependencies
215 | Opt_PolymorphicComponents
216 | Opt_ExistentialQuantification
220 | Opt_PatternSignatures
221 | Opt_ParallelListComp
222 | Opt_TransformListComp
223 | Opt_GeneralizedNewtypeDeriving
225 | Opt_PostfixOperators
227 | Opt_LiberalTypeSynonyms
230 | Opt_ImpredicativeTypes
233 | Opt_PrintExplicitForalls
238 | Opt_StaticArgumentTransformation
242 | Opt_IgnoreInterfacePragmas
243 | Opt_OmitInterfacePragmas
244 | Opt_DoLambdaEtaExpansion
248 | Opt_UnboxStrictFields
253 | Opt_RegsGraph -- do graph coloring register allocation
254 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
262 | Opt_ExcessPrecision
263 | Opt_ReadUserPackageConf
267 | Opt_HideAllPackages
268 | Opt_PrintBindResult
272 | Opt_BreakOnException
274 | Opt_PrintEvldWithShow
275 | Opt_PrintBindContents
279 | Opt_ConvertToZipCfgAndBack
280 | Opt_AutoLinkPackages
291 data DynFlags = DynFlags {
294 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
295 stgToDo :: Maybe [StgToDo], -- similarly
296 hscTarget :: HscTarget,
297 hscOutName :: String, -- name of the output file
298 extCoreName :: String, -- name of the .core output file
299 verbosity :: Int, -- verbosity level
300 optLevel :: Int, -- optimisation level
301 simplPhases :: Int, -- number of simplifier phases
302 maxSimplIterations :: Int, -- max simplifier iterations
303 shouldDumpSimplPhase :: SimplifierMode -> Bool,
304 ruleCheck :: Maybe String,
306 specConstrThreshold :: Maybe Int, -- Threshold for SpecConstr
307 specConstrCount :: Maybe Int, -- Max number of specialisations for any one function
308 liberateCaseThreshold :: Maybe Int, -- Threshold for LiberateCase
310 stolen_x86_regs :: Int,
311 cmdlineHcIncludes :: [String], -- -#includes
312 importPaths :: [FilePath],
314 mainFunIs :: Maybe String,
315 ctxtStkDepth :: Int, -- Typechecker context stack depth
317 dphBackend :: DPHBackend,
319 thisPackage :: PackageId,
322 wayNames :: [WayName], -- way flags from the cmd line
323 buildTag :: String, -- the global "way" (eg. "p" for prof)
324 rtsBuildTag :: String, -- the RTS "way"
327 objectDir :: Maybe String,
328 hiDir :: Maybe String,
329 stubDir :: Maybe String,
335 outputFile :: Maybe String,
336 outputHi :: Maybe String,
337 dynLibLoader :: DynLibLoader,
339 -- | This is set by DriverPipeline.runPipeline based on where
340 -- its output is going.
341 dumpPrefix :: Maybe FilePath,
343 -- | Override the dumpPrefix set by runPipeline.
344 -- Set by -ddump-file-prefix
345 dumpPrefixForce :: Maybe FilePath,
347 includePaths :: [String],
348 libraryPaths :: [String],
349 frameworkPaths :: [String], -- used on darwin only
350 cmdlineFrameworks :: [String], -- ditto
351 tmpDir :: String, -- no trailing '/'
353 ghcUsagePath :: FilePath, -- Filled in by SysTools
354 ghciUsagePath :: FilePath, -- ditto
356 hpcDir :: String, -- ^ path to store the .mix files
358 -- options for particular phases
366 opt_windres :: [String],
368 -- commands for particular phases
370 pgm_P :: (String,[Option]),
372 pgm_c :: (String,[Option]),
373 pgm_m :: (String,[Option]),
374 pgm_s :: (String,[Option]),
375 pgm_a :: (String,[Option]),
376 pgm_l :: (String,[Option]),
377 pgm_dll :: (String,[Option]),
379 pgm_sysman :: String,
380 pgm_windres :: String,
383 depMakefile :: FilePath,
384 depIncludePkgDeps :: Bool,
385 depExcludeMods :: [ModuleName],
386 depSuffixes :: [String],
390 extraPkgConfs :: [FilePath],
391 topDir :: FilePath, -- filled in by SysTools
392 systemPackageConfig :: FilePath, -- ditto
393 -- The -package-conf flags given on the command line, in the order
396 packageFlags :: [PackageFlag],
397 -- The -package and -hide-package flags from the command-line
400 -- NB. do not modify this field, it is calculated by
401 -- Packages.initPackages and Packages.updatePackages.
402 pkgDatabase :: Maybe (UniqFM PackageConfig),
403 pkgState :: PackageState,
409 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
411 haddockOptions :: Maybe String
422 -- | will this target result in an object file on the disk?
423 isObjectTarget :: HscTarget -> Bool
424 isObjectTarget HscC = True
425 isObjectTarget HscAsm = True
426 isObjectTarget _ = False
428 -- | The 'GhcMode' tells us whether we're doing multi-module
429 -- compilation (controlled via the "GHC" API) or one-shot
430 -- (single-module) compilation. This makes a difference primarily to
431 -- the "Finder": in one-shot mode we look for interface files for
432 -- imported modules, but in multi-module mode we look for source files
433 -- in order to check whether they need to be recompiled.
435 = CompManager -- ^ --make, GHCi, etc.
436 | OneShot -- ^ ghc -c Foo.hs
437 | MkDepend -- ^ ghc -M, see Finder for why we need this
440 isOneShot :: GhcMode -> Bool
441 isOneShot OneShot = True
442 isOneShot _other = False
444 -- | What kind of linking to do.
445 data GhcLink -- What to do in the link step, if there is one
446 = NoLink -- Don't link at all
447 | LinkBinary -- Link object code into a binary
448 | LinkInMemory -- Use the in-memory dynamic linker
449 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
452 isNoLink :: GhcLink -> Bool
453 isNoLink NoLink = True
457 = ExposePackage String
459 | IgnorePackage String
462 defaultHscTarget :: HscTarget
463 defaultHscTarget = defaultObjectTarget
465 -- | the 'HscTarget' value corresponding to the default way to create
466 -- object files on the current platform.
467 defaultObjectTarget :: HscTarget
469 | cGhcWithNativeCodeGen == "YES" = HscAsm
474 | Wrapped (Maybe String)
478 initDynFlags :: DynFlags -> IO DynFlags
479 initDynFlags dflags = do
480 -- someday these will be dynamic flags
481 ways <- readIORef v_Ways
482 build_tag <- readIORef v_Build_tag
483 rts_build_tag <- readIORef v_RTS_Build_tag
486 buildTag = build_tag,
487 rtsBuildTag = rts_build_tag
490 defaultDynFlags :: DynFlags
493 ghcMode = CompManager,
494 ghcLink = LinkBinary,
497 hscTarget = defaultHscTarget,
503 maxSimplIterations = 4,
504 shouldDumpSimplPhase = const False,
506 specConstrThreshold = Just 200,
507 specConstrCount = Just 3,
508 liberateCaseThreshold = Just 200,
510 cmdlineHcIncludes = [],
514 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
518 thisPackage = mainPackageId,
524 objectSuf = phaseInputExt StopLn,
525 hcSuf = phaseInputExt HCc,
528 outputFile = Nothing,
530 dynLibLoader = Deployable,
531 dumpPrefix = Nothing,
532 dumpPrefixForce = Nothing,
536 cmdlineFrameworks = [],
537 tmpDir = cDEFAULT_TMPDIR,
554 pkgDatabase = Nothing,
555 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
556 wayNames = panic "defaultDynFlags: No wayNames",
557 buildTag = panic "defaultDynFlags: No buildTag",
558 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
559 -- initSysTools fills all these in
560 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
561 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
562 topDir = panic "defaultDynFlags: No topDir",
563 systemPackageConfig = panic "defaultDynFlags: No systemPackageConfig",
564 pgm_L = panic "defaultDynFlags: No pgm_L",
565 pgm_P = panic "defaultDynFlags: No pgm_P",
566 pgm_F = panic "defaultDynFlags: No pgm_F",
567 pgm_c = panic "defaultDynFlags: No pgm_c",
568 pgm_m = panic "defaultDynFlags: No pgm_m",
569 pgm_s = panic "defaultDynFlags: No pgm_s",
570 pgm_a = panic "defaultDynFlags: No pgm_a",
571 pgm_l = panic "defaultDynFlags: No pgm_l",
572 pgm_dll = panic "defaultDynFlags: No pgm_dll",
573 pgm_T = panic "defaultDynFlags: No pgm_T",
574 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
575 pgm_windres = panic "defaultDynFlags: No pgm_windres",
576 -- end of initSysTools values
578 depMakefile = "Makefile",
579 depIncludePkgDeps = False,
583 -- end of ghc -M values
584 haddockOptions = Nothing,
586 Opt_AutoLinkPackages,
587 Opt_ReadUserPackageConf,
589 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
590 -- behaviour the default, to see if anyone notices
594 Opt_MonomorphismRestriction,
602 Opt_PrintBindContents
604 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
605 -- The default -O0 options
608 log_action = \severity srcSpan style msg ->
610 SevInfo -> printErrs (msg style)
611 SevFatal -> printErrs (msg style)
614 printErrs ((mkLocMessage srcSpan msg) style)
615 -- careful (#2302): printErrs prints in UTF-8, whereas
616 -- converting to string first and using hPutStr would
617 -- just emit the low 8 bits of each unicode char.
623 0 | print errors & warnings only
624 1 | minimal verbosity: print "compiling M ... done." for each module.
625 2 | equivalent to -dshow-passes
626 3 | equivalent to existing "ghc -v"
627 4 | "ghc -v -ddump-most"
628 5 | "ghc -v -ddump-all"
631 dopt :: DynFlag -> DynFlags -> Bool
632 dopt f dflags = f `elem` (flags dflags)
634 dopt_set :: DynFlags -> DynFlag -> DynFlags
635 dopt_set dfs f = dfs{ flags = f : flags dfs }
637 dopt_unset :: DynFlags -> DynFlag -> DynFlags
638 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
640 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
641 getOpts dflags opts = reverse (opts dflags)
642 -- We add to the options from the front, so we need to reverse the list
644 getVerbFlag :: DynFlags -> String
646 | verbosity dflags >= 3 = "-v"
649 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
650 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
651 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
652 addCmdlineFramework, addHaddockOpts
653 :: String -> DynFlags -> DynFlags
654 setOutputFile, setOutputHi, setDumpPrefixForce
655 :: Maybe String -> DynFlags -> DynFlags
657 setObjectDir f d = d{ objectDir = Just f}
658 setHiDir f d = d{ hiDir = Just f}
659 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
660 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
661 -- \#included from the .hc file when compiling with -fvia-C.
663 setObjectSuf f d = d{ objectSuf = f}
664 setHiSuf f d = d{ hiSuf = f}
665 setHcSuf f d = d{ hcSuf = f}
667 setOutputFile f d = d{ outputFile = f}
668 setOutputHi f d = d{ outputHi = f}
670 parseDynLibLoaderMode f d =
672 ("deploy", "") -> d{ dynLibLoader = Deployable }
673 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
674 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
675 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
676 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
677 (_,_) -> error "Unknown dynlib loader"
679 setDumpPrefixForce f d = d { dumpPrefixForce = f}
681 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
682 -- Config.hs should really use Option.
683 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
685 setPgmL f d = d{ pgm_L = f}
686 setPgmF f d = d{ pgm_F = f}
687 setPgmc f d = d{ pgm_c = (f,[])}
688 setPgmm f d = d{ pgm_m = (f,[])}
689 setPgms f d = d{ pgm_s = (f,[])}
690 setPgma f d = d{ pgm_a = (f,[])}
691 setPgml f d = d{ pgm_l = (f,[])}
692 setPgmdll f d = d{ pgm_dll = (f,[])}
693 setPgmwindres f d = d{ pgm_windres = f}
695 addOptL f d = d{ opt_L = f : opt_L d}
696 addOptP f d = d{ opt_P = f : opt_P d}
697 addOptF f d = d{ opt_F = f : opt_F d}
698 addOptc f d = d{ opt_c = f : opt_c d}
699 addOptm f d = d{ opt_m = f : opt_m d}
700 addOpta f d = d{ opt_a = f : opt_a d}
701 addOptl f d = d{ opt_l = f : opt_l d}
702 addOptwindres f d = d{ opt_windres = f : opt_windres d}
704 setDepMakefile :: FilePath -> DynFlags -> DynFlags
705 setDepMakefile f d = d { depMakefile = deOptDep f }
707 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
708 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
710 addDepExcludeMod :: String -> DynFlags -> DynFlags
712 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
714 addDepSuffix :: FilePath -> DynFlags -> DynFlags
715 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
717 setDepWarnings :: Bool -> DynFlags -> DynFlags
718 setDepWarnings b d = d { depWarnings = b }
721 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
722 -- we need to strip the "-optdep" off of the arg
723 deOptDep :: String -> String
724 deOptDep x = case maybePrefixMatch "-optdep" x of
728 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
730 addHaddockOpts f d = d{ haddockOptions = Just f}
732 -- -----------------------------------------------------------------------------
733 -- Command-line options
735 -- When invoking external tools as part of the compilation pipeline, we
736 -- pass these a sequence of options on the command-line. Rather than
737 -- just using a list of Strings, we use a type that allows us to distinguish
738 -- between filepaths and 'other stuff'. [The reason being, of course, that
739 -- this type gives us a handle on transforming filenames, and filenames only,
740 -- to whatever format they're expected to be on a particular platform.]
743 = FileOption -- an entry that _contains_ filename(s) / filepaths.
744 String -- a non-filepath prefix that shouldn't be
745 -- transformed (e.g., "/out=")
746 String -- the filepath/filename portion
749 -----------------------------------------------------------------------------
750 -- Setting the optimisation level
752 updOptLevel :: Int -> DynFlags -> DynFlags
753 -- Set dynflags appropriate to the optimisation level
755 = dfs2{ optLevel = final_n }
757 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
758 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
759 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
761 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
762 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
764 optLevelFlags :: [([Int], DynFlag)]
766 = [ ([0], Opt_IgnoreInterfacePragmas)
767 , ([0], Opt_OmitInterfacePragmas)
769 , ([1,2], Opt_IgnoreAsserts)
770 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
772 , ([1,2], Opt_DoEtaReduction)
773 , ([1,2], Opt_CaseMerge)
774 , ([1,2], Opt_Strictness)
776 , ([1,2], Opt_FullLaziness)
778 , ([2], Opt_LiberateCase)
779 , ([2], Opt_SpecConstr)
780 , ([2], Opt_StaticArgumentTransformation)
782 , ([0,1,2], Opt_DoLambdaEtaExpansion)
783 -- This one is important for a tiresome reason:
784 -- we want to make sure that the bindings for data
785 -- constructors are eta-expanded. This is probably
786 -- a good thing anyway, but it seems fragile.
789 -- -----------------------------------------------------------------------------
790 -- Standard sets of warning options
792 standardWarnings :: [DynFlag]
794 = [ Opt_WarnWarningsDeprecations,
795 Opt_WarnDeprecatedFlags,
796 Opt_WarnOverlappingPatterns,
797 Opt_WarnMissingFields,
798 Opt_WarnMissingMethods,
799 Opt_WarnDuplicateExports,
800 Opt_WarnDodgyForeignImports
803 minusWOpts :: [DynFlag]
805 = standardWarnings ++
806 [ Opt_WarnUnusedBinds,
807 Opt_WarnUnusedMatches,
808 Opt_WarnUnusedImports,
809 Opt_WarnIncompletePatterns,
813 minusWallOpts :: [DynFlag]
816 [ Opt_WarnTypeDefaults,
817 Opt_WarnNameShadowing,
823 -- minuswRemovesOpts should be every warning option
824 minuswRemovesOpts :: [DynFlag]
827 [Opt_WarnImplicitPrelude,
828 Opt_WarnIncompletePatternsRecUpd,
829 Opt_WarnSimplePatterns,
830 Opt_WarnMonomorphism,
834 -- -----------------------------------------------------------------------------
835 -- CoreToDo: abstraction of core-to-core passes to run.
837 data CoreToDo -- These are diff core-to-core passes,
838 -- which may be invoked in any order,
839 -- as many times as you like.
841 = CoreDoSimplify -- The core-to-core simplifier.
844 -- Each run of the simplifier can take a different
845 -- set of simplifier-specific flags.
847 | CoreDoFloatOutwards FloatOutSwitches
852 | CoreDoWorkerWrapper
855 | CoreDoOldStrictness
858 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
859 -- matching this string
860 | CoreDoVectorisation DPHBackend
861 | CoreDoNothing -- Useful when building up
862 | CoreDoPasses [CoreToDo] -- lists of these things
864 data SimplifierMode -- See comments in SimplMonad
866 | SimplPhase Int [String]
868 data SimplifierSwitch
869 = MaxSimplifierIterations Int
872 data FloatOutSwitches
873 = FloatOutSw Bool -- True <=> float lambdas to top level
874 Bool -- True <=> float constants to top level,
875 -- even if they do not escape a lambda
878 -- The core-to-core pass ordering is derived from the DynFlags:
879 runWhen :: Bool -> CoreToDo -> CoreToDo
880 runWhen True do_this = do_this
881 runWhen False _ = CoreDoNothing
883 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
884 runMaybe (Just x) f = f x
885 runMaybe Nothing _ = CoreDoNothing
887 getCoreToDo :: DynFlags -> [CoreToDo]
889 | Just todo <- coreToDo dflags = todo -- set explicitly by user
890 | otherwise = core_todo
892 opt_level = optLevel dflags
893 phases = simplPhases dflags
894 max_iter = maxSimplIterations dflags
895 strictness = dopt Opt_Strictness dflags
896 full_laziness = dopt Opt_FullLaziness dflags
897 cse = dopt Opt_CSE dflags
898 spec_constr = dopt Opt_SpecConstr dflags
899 liberate_case = dopt Opt_LiberateCase dflags
900 rule_check = ruleCheck dflags
901 static_args = dopt Opt_StaticArgumentTransformation dflags
903 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
905 simpl_phase phase names iter
907 [ CoreDoSimplify (SimplPhase phase names) [
908 MaxSimplifierIterations iter
910 maybe_rule_check phase
914 = runWhen (dopt Opt_Vectorise dflags)
915 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
918 -- By default, we have 2 phases before phase 0.
920 -- Want to run with inline phase 2 after the specialiser to give
921 -- maximum chance for fusion to work before we inline build/augment
922 -- in phase 1. This made a difference in 'ansi' where an
923 -- overloaded function wasn't inlined till too late.
925 -- Need phase 1 so that build/augment get
926 -- inlined. I found that spectral/hartel/genfft lost some useful
927 -- strictness in the function sumcode' if augment is not inlined
928 -- before strictness analysis runs
929 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
930 | phase <- [phases, phases-1 .. 1] ]
933 -- initial simplify: mk specialiser happy: minimum effort please
934 simpl_gently = CoreDoSimplify SimplGently [
936 -- Don't inline anything till full laziness has bitten
937 -- In particular, inlining wrappers inhibits floating
938 -- e.g. ...(case f x of ...)...
939 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
940 -- ==> ...(case x of I# x# -> case fw x# of ...)...
941 -- and now the redex (f x) isn't floatable any more
942 -- Similarly, don't apply any rules until after full
943 -- laziness. Notably, list fusion can prevent floating.
945 NoCaseOfCase, -- Don't do case-of-case transformations.
946 -- This makes full laziness work better
947 MaxSimplifierIterations max_iter
951 if opt_level == 0 then
953 simpl_phase 0 ["final"] max_iter]
954 else {- opt_level >= 1 -} [
956 -- We want to do the static argument transform before full laziness as it
957 -- may expose extra opportunities to float things outwards. However, to fix
958 -- up the output of the transformation we need at do at least one simplify
959 -- after this before anything else
960 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
962 -- We run vectorisation here for now, but we might also try to run
966 -- initial simplify: mk specialiser happy: minimum effort please
969 -- Specialisation is best done before full laziness
970 -- so that overloaded functions have all their dictionary lambdas manifest
973 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
979 -- Phase 0: allow all Ids to be inlined now
980 -- This gets foldr inlined before strictness analysis
982 -- At least 3 iterations because otherwise we land up with
983 -- huge dead expressions because of an infelicity in the
985 -- let k = BIG in foldr k z xs
986 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
987 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
989 simpl_phase 0 ["main"] (max max_iter 3),
992 #ifdef OLD_STRICTNESS
995 runWhen strictness (CoreDoPasses [
999 simpl_phase 0 ["post-worker-wrapper"] max_iter
1002 runWhen full_laziness
1003 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1004 True)), -- Float constants
1005 -- nofib/spectral/hartel/wang doubles in speed if you
1006 -- do full laziness late in the day. It only happens
1007 -- after fusion and other stuff, so the early pass doesn't
1008 -- catch it. For the record, the redex is
1009 -- f_el22 (f_el21 r_midblock)
1012 runWhen cse CoreCSE,
1013 -- We want CSE to follow the final full-laziness pass, because it may
1014 -- succeed in commoning up things floated out by full laziness.
1015 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1021 -- Case-liberation for -O2. This should be after
1022 -- strictness analysis and the simplification which follows it.
1023 runWhen liberate_case (CoreDoPasses [
1025 simpl_phase 0 ["post-liberate-case"] max_iter
1026 ]), -- Run the simplifier after LiberateCase to vastly
1027 -- reduce the possiblility of shadowing
1028 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1030 runWhen spec_constr CoreDoSpecConstr,
1034 -- Final clean-up simplification:
1035 simpl_phase 0 ["final"] max_iter
1038 -- -----------------------------------------------------------------------------
1039 -- StgToDo: abstraction of stg-to-stg passes to run.
1042 = StgDoMassageForProfiling -- should be (next to) last
1043 -- There's also setStgVarInfo, but its absolute "lastness"
1044 -- is so critical that it is hardwired in (no flag).
1047 getStgToDo :: DynFlags -> [StgToDo]
1049 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1052 stg_stats = dopt Opt_StgStats dflags
1054 todo1 = if stg_stats then [D_stg_stats] else []
1056 todo2 | WayProf `elem` wayNames dflags
1057 = StgDoMassageForProfiling : todo1
1061 -- -----------------------------------------------------------------------------
1064 allFlags :: [String]
1065 allFlags = map ('-':) $
1066 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1067 map ("fno-"++) flags ++
1068 map ("f"++) flags ++
1069 map ("X"++) supportedLanguages ++
1070 map ("XNo"++) supportedLanguages
1071 where ok (PrefixPred _ _) = False
1073 flags = [ name | (name, _, _) <- fFlags ]
1075 dynamic_flags :: [Flag DynP]
1077 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1078 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1079 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1080 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1081 , Flag "v" (OptIntSuffix setVerbosity) Supported
1083 ------- Specific phases --------------------------------------------
1084 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1085 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1086 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1087 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1088 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1089 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1090 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1091 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1092 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1093 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1095 , Flag "optL" (HasArg (upd . addOptL)) Supported
1096 , Flag "optP" (HasArg (upd . addOptP)) Supported
1097 , Flag "optF" (HasArg (upd . addOptF)) Supported
1098 , Flag "optc" (HasArg (upd . addOptc)) Supported
1099 , Flag "optm" (HasArg (upd . addOptm)) Supported
1100 , Flag "opta" (HasArg (upd . addOpta)) Supported
1101 , Flag "optl" (HasArg (upd . addOptl)) Supported
1102 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1105 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1108 -------- ghc -M -----------------------------------------------------
1109 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1110 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1111 (Deprecated "Use -dep-suffix instead")
1112 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1113 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1114 (Deprecated "Use -dep-makefile instead")
1115 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1116 (Deprecated "-optdep-w doesn't do anything")
1117 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1118 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1119 (Deprecated "Use -include-pkg-deps instead")
1120 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1121 (Deprecated "Use -include-pkg-deps instead")
1122 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1123 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1124 (Deprecated "Use -exclude-module instead")
1125 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1126 (Deprecated "Use -exclude-module instead")
1128 -------- Linking ----------------------------------------------------
1129 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1131 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1132 (Deprecated "Use -c instead")
1133 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1135 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1138 ------- Libraries ---------------------------------------------------
1139 , Flag "L" (Prefix addLibraryPath ) Supported
1140 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1142 ------- Frameworks --------------------------------------------------
1143 -- -framework-path should really be -F ...
1144 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1145 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1147 ------- Output Redirection ------------------------------------------
1148 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1149 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1150 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1151 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1152 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1153 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1154 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1155 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1156 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1157 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1160 ------- Keeping temporary files -------------------------------------
1161 -- These can be singular (think ghc -c) or plural (think ghc --make)
1162 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1163 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1164 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1165 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1166 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1167 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1168 -- This only makes sense as plural
1169 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1171 ------- Miscellaneous ----------------------------------------------
1172 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1173 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1174 , Flag "main-is" (SepArg setMainIs ) Supported
1175 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1176 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1177 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1179 ------- recompilation checker --------------------------------------
1180 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1181 (Deprecated "Use -fno-force-recomp instead")
1182 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1183 (Deprecated "Use -fforce-recomp instead")
1185 ------- Packages ----------------------------------------------------
1186 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1187 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1189 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1190 , Flag "package" (HasArg exposePackage) Supported
1191 , Flag "hide-package" (HasArg hidePackage) Supported
1192 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1194 , Flag "ignore-package" (HasArg ignorePackage)
1196 , Flag "syslib" (HasArg exposePackage)
1197 (Deprecated "Use -package instead")
1199 ------ HsCpp opts ---------------------------------------------------
1200 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1201 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1203 ------- Include/Import Paths ----------------------------------------
1204 , Flag "I" (Prefix addIncludePath) Supported
1205 , Flag "i" (OptPrefix addImportPath ) Supported
1207 ------ Debugging ----------------------------------------------------
1208 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1210 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1212 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1214 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1216 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1218 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1220 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1222 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1224 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1226 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1228 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1230 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1232 , Flag "ddump-asm-regalloc-stages"
1233 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1235 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1237 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1239 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1241 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1243 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1245 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1247 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1249 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1251 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1253 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1255 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1257 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1259 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1261 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1263 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1265 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1267 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1269 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1271 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1273 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1275 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1277 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1279 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1281 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1283 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1285 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1287 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1289 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1291 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1293 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1295 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1297 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1299 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1301 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1303 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1305 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1307 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1309 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1311 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1313 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1315 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1317 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1320 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1322 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1324 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1326 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1328 , Flag "dshow-passes"
1329 (NoArg (do setDynFlag Opt_ForceRecomp
1330 setVerbosity (Just 2)))
1332 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1335 ------ Machine dependant (-m<blah>) stuff ---------------------------
1337 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1339 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1341 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1344 ------ Warning opts -------------------------------------------------
1345 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1347 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1349 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1351 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1353 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1354 (Deprecated "Use -w instead")
1355 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1358 ------ Optimisation flags ------------------------------------------
1359 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1360 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1361 (Deprecated "Use -O0 instead")
1362 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1363 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1365 -- If the number is missing, use 1
1367 , Flag "fsimplifier-phases"
1368 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1370 , Flag "fmax-simplifier-iterations"
1371 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1374 , Flag "fspec-constr-threshold"
1375 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1377 , Flag "fno-spec-constr-threshold"
1378 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1380 , Flag "fspec-constr-count"
1381 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1383 , Flag "fno-spec-constr-count"
1384 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1386 , Flag "fliberate-case-threshold"
1387 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1389 , Flag "fno-liberate-case-threshold"
1390 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1393 , Flag "frule-check"
1394 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1396 , Flag "fcontext-stack"
1397 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1400 ------ DPH flags ----------------------------------------------------
1403 (NoArg (upd (setDPHBackend DPHSeq)))
1406 (NoArg (upd (setDPHBackend DPHPar)))
1409 ------ Compiler flags -----------------------------------------------
1411 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1412 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1413 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1415 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1416 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1417 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1419 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1421 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1424 ++ map (mkFlag True "f" setDynFlag ) fFlags
1425 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1426 ++ map (mkFlag True "X" setDynFlag ) xFlags
1427 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1429 mkFlag :: Bool -- True => turn it on, False => turn it off
1431 -> (DynFlag -> DynP ())
1432 -> (String, DynFlag, Bool -> Deprecated)
1434 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1435 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1437 deprecatedForLanguage :: String -> Bool -> Deprecated
1438 deprecatedForLanguage lang turnOn =
1439 Deprecated ("Use the " ++ prefix ++ lang ++ " language instead")
1440 where prefix = if turnOn then "" else "No"
1442 -- these -f<blah> flags can all be reversed with -fno-<blah>
1444 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1446 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1447 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1448 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1449 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1450 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1451 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1452 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1453 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1454 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1455 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1456 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1457 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1458 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1459 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1460 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1461 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1462 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1463 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1464 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1465 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1466 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1467 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1468 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1469 ( "strictness", Opt_Strictness, const Supported ),
1470 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1471 ( "full-laziness", Opt_FullLaziness, const Supported ),
1472 ( "liberate-case", Opt_LiberateCase, const Supported ),
1473 ( "spec-constr", Opt_SpecConstr, const Supported ),
1474 ( "cse", Opt_CSE, const Supported ),
1475 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1476 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1477 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1478 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1479 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1480 ( "case-merge", Opt_CaseMerge, const Supported ),
1481 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1482 ( "method-sharing", Opt_MethodSharing, const Supported ),
1483 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1484 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1485 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1486 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1487 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1488 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1489 ( "rewrite-rules", Opt_RewriteRules, const Supported ),
1490 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1491 ( "break-on-error", Opt_BreakOnError, const Supported ),
1492 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1493 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1494 ( "run-cps", Opt_RunCPSZ, const Supported ),
1495 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1496 ( "vectorise", Opt_Vectorise, const Supported ),
1497 ( "regs-graph", Opt_RegsGraph, const Supported ),
1498 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1499 ( "th", Opt_TemplateHaskell,
1500 deprecatedForLanguage "TemplateHaskell" ),
1501 ( "fi", Opt_ForeignFunctionInterface,
1502 deprecatedForLanguage "ForeignFunctionInterface" ),
1503 ( "ffi", Opt_ForeignFunctionInterface,
1504 deprecatedForLanguage "ForeignFunctionInterface" ),
1505 ( "arrows", Opt_Arrows,
1506 deprecatedForLanguage "Arrows" ),
1507 ( "generics", Opt_Generics,
1508 deprecatedForLanguage "Generics" ),
1509 ( "implicit-prelude", Opt_ImplicitPrelude,
1510 deprecatedForLanguage "ImplicitPrelude" ),
1511 ( "bang-patterns", Opt_BangPatterns,
1512 deprecatedForLanguage "BangPatterns" ),
1513 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1514 deprecatedForLanguage "MonomorphismRestriction" ),
1515 ( "mono-pat-binds", Opt_MonoPatBinds,
1516 deprecatedForLanguage "MonoPatBinds" ),
1517 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1518 deprecatedForLanguage "ExtendedDefaultRules" ),
1519 ( "implicit-params", Opt_ImplicitParams,
1520 deprecatedForLanguage "ImplicitParams" ),
1521 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1522 deprecatedForLanguage "ScopedTypeVariables" ),
1524 deprecatedForLanguage "PArr" ),
1525 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1526 deprecatedForLanguage "OverlappingInstances" ),
1527 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1528 deprecatedForLanguage "UndecidableInstances" ),
1529 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1530 deprecatedForLanguage "IncoherentInstances" ),
1531 ( "gen-manifest", Opt_GenManifest, const Supported ),
1532 ( "embed-manifest", Opt_EmbedManifest, const Supported )
1535 supportedLanguages :: [String]
1536 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1538 -- This may contain duplicates
1539 languageOptions :: [DynFlag]
1540 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1542 -- These -X<blah> flags can all be reversed with -XNo<blah>
1543 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1545 ( "CPP", Opt_Cpp, const Supported ),
1546 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1547 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1548 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1549 ( "MagicHash", Opt_MagicHash, const Supported ),
1550 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1551 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1552 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1553 ( "PatternSignatures", Opt_PatternSignatures, const Supported ),
1554 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1555 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1556 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1557 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1558 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1559 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1560 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1561 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1562 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1563 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1564 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1565 ( "Arrows", Opt_Arrows, const Supported ),
1566 ( "PArr", Opt_PArr, const Supported ),
1567 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1568 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1569 ( "Generics", Opt_Generics, const Supported ),
1571 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1572 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1573 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1574 ( "RecordPuns", Opt_RecordPuns,
1575 deprecatedForLanguage "NamedFieldPuns" ),
1576 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1577 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1578 ( "GADTs", Opt_GADTs, const Supported ),
1579 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1580 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1581 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1583 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1584 -- On by default (which is not strictly H98):
1585 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1586 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1587 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1588 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1589 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1590 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1591 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1592 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1593 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1594 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1595 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1596 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1597 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1598 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1599 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1600 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1601 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1602 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported )
1605 impliedFlags :: [(DynFlag, [DynFlag])]
1607 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1608 -- be completely rigid for GADTs
1609 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1610 -- Note [Scoped tyvars] in TcBinds
1613 glasgowExtsFlags :: [DynFlag]
1614 glasgowExtsFlags = [
1615 Opt_PrintExplicitForalls
1616 , Opt_ForeignFunctionInterface
1617 , Opt_UnliftedFFITypes
1619 , Opt_ImplicitParams
1620 , Opt_ScopedTypeVariables
1622 , Opt_TypeSynonymInstances
1623 , Opt_StandaloneDeriving
1624 , Opt_DeriveDataTypeable
1625 , Opt_FlexibleContexts
1626 , Opt_FlexibleInstances
1627 , Opt_ConstrainedClassMethods
1628 , Opt_MultiParamTypeClasses
1629 , Opt_FunctionalDependencies
1631 , Opt_PolymorphicComponents
1632 , Opt_ExistentialQuantification
1634 , Opt_PostfixOperators
1636 , Opt_LiberalTypeSynonyms
1638 , Opt_ImpredicativeTypes
1641 , Opt_ParallelListComp
1642 , Opt_EmptyDataDecls
1643 , Opt_KindSignatures
1644 , Opt_PatternSignatures
1645 , Opt_GeneralizedNewtypeDeriving
1646 , Opt_TypeFamilies ]
1648 -- -----------------------------------------------------------------------------
1649 -- Parsing the dynamic flags.
1651 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags, [String], [String])
1652 parseDynamicFlags dflags args = do
1653 -- XXX Legacy support code
1654 -- We used to accept things like
1655 -- optdep-f -optdepdepend
1656 -- optdep-f -optdep depend
1657 -- optdep -f -optdepdepend
1658 -- optdep -f -optdep depend
1659 -- but the spaces trip up proper argument handling. So get rid of them.
1660 let f ("-optdep" : x : xs) = ("-optdep" ++ x) : f xs
1661 f (x : xs) = x : f xs
1664 let ((leftover, errs, warns), dflags')
1665 = runCmdLine (processArgs dynamic_flags args') dflags
1666 when (not (null errs)) $ do
1667 throwDyn (UsageError (unlines errs))
1668 return (dflags', leftover, warns)
1670 type DynP = CmdLineP DynFlags
1672 upd :: (DynFlags -> DynFlags) -> DynP ()
1674 dfs <- getCmdLineState
1675 putCmdLineState $! (f dfs)
1677 --------------------------
1678 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1679 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1681 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1682 -- When you set f, set the ones it implies
1683 -- When you un-set f, however, we don't un-set the things it implies
1684 -- (except for -fno-glasgow-exts, which is treated specially)
1686 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1688 --------------------------
1689 setDumpFlag :: DynFlag -> OptKind DynP
1690 setDumpFlag dump_flag
1691 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1692 | otherwise = NoArg (setDynFlag dump_flag)
1694 -- Whenver we -ddump, switch off the recompilation checker,
1695 -- else you don't see the dump!
1696 -- However, certain dumpy-things are really interested in what's going
1697 -- on during recompilation checking, so in those cases we
1698 -- don't want to turn it off.
1699 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1700 Opt_D_dump_hi_diffs]
1702 setVerboseCore2Core :: DynP ()
1703 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1704 setDynFlag Opt_D_verbose_core2core
1705 upd (\s -> s { shouldDumpSimplPhase = const True })
1707 setDumpSimplPhases :: String -> DynP ()
1708 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1709 upd (\s -> s { shouldDumpSimplPhase = spec })
1711 spec :: SimplifierMode -> Bool
1713 . map (join (&&) . map match . split ':')
1719 join :: (Bool -> Bool -> Bool)
1720 -> [SimplifierMode -> Bool]
1721 -> SimplifierMode -> Bool
1722 join _ [] = const True
1723 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1725 match :: String -> SimplifierMode -> Bool
1726 match "" = const True
1727 match s = case reads s of
1728 [(n,"")] -> phase_num n
1731 phase_num :: Int -> SimplifierMode -> Bool
1732 phase_num n (SimplPhase k _) = n == k
1733 phase_num _ _ = False
1735 phase_name :: String -> SimplifierMode -> Bool
1736 phase_name s SimplGently = s == "gentle"
1737 phase_name s (SimplPhase _ ss) = s `elem` ss
1739 setVerbosity :: Maybe Int -> DynP ()
1740 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1742 addCmdlineHCInclude :: String -> DynP ()
1743 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1745 extraPkgConf_ :: FilePath -> DynP ()
1746 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1748 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1750 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1752 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1754 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1756 setPackageName :: String -> DynFlags -> DynFlags
1758 | Nothing <- unpackPackageId pid
1759 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1761 = \s -> s{ thisPackage = pid }
1763 pid = stringToPackageId p
1765 -- If we're linking a binary, then only targets that produce object
1766 -- code are allowed (requests for other target types are ignored).
1767 setTarget :: HscTarget -> DynP ()
1768 setTarget l = upd set
1771 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1774 -- Changes the target only if we're compiling object code. This is
1775 -- used by -fasm and -fvia-C, which switch from one to the other, but
1776 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1777 -- can be safely used in an OPTIONS_GHC pragma.
1778 setObjTarget :: HscTarget -> DynP ()
1779 setObjTarget l = upd set
1782 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1785 setOptLevel :: Int -> DynFlags -> DynFlags
1786 setOptLevel n dflags
1787 | hscTarget dflags == HscInterpreted && n > 0
1789 -- not in IO any more, oh well:
1790 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1792 = updOptLevel n dflags
1795 -- -Odph is equivalent to
1797 -- -O2 optimise as much as possible
1798 -- -fno-method-sharing sharing specialisation defeats fusion
1800 -- -fdicts-cheap always inline dictionaries
1801 -- -fmax-simplifier-iterations20 this is necessary sometimes
1802 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1804 setDPHOpt :: DynFlags -> DynFlags
1805 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1806 , specConstrThreshold = Nothing
1808 `dopt_set` Opt_DictsCheap
1809 `dopt_unset` Opt_MethodSharing
1811 data DPHBackend = DPHPar
1814 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1815 setDPHBackend backend dflags = dflags { dphBackend = backend }
1818 setMainIs :: String -> DynP ()
1820 | not (null main_fn) && isLower (head main_fn)
1821 -- The arg looked like "Foo.Bar.baz"
1822 = upd $ \d -> d{ mainFunIs = Just main_fn,
1823 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1825 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1826 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1828 | otherwise -- The arg looked like "baz"
1829 = upd $ \d -> d{ mainFunIs = Just arg }
1831 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1833 -----------------------------------------------------------------------------
1834 -- Paths & Libraries
1836 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1838 -- -i on its own deletes the import paths
1839 addImportPath "" = upd (\s -> s{importPaths = []})
1840 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1844 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1847 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1849 addFrameworkPath p =
1850 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1852 #ifndef mingw32_TARGET_OS
1853 split_marker :: Char
1854 split_marker = ':' -- not configurable (ToDo)
1857 splitPathList :: String -> [String]
1858 splitPathList s = filter notNull (splitUp s)
1859 -- empty paths are ignored: there might be a trailing
1860 -- ':' in the initial list, for example. Empty paths can
1861 -- cause confusion when they are translated into -I options
1862 -- for passing to gcc.
1864 #ifndef mingw32_TARGET_OS
1865 splitUp xs = split split_marker xs
1867 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1869 -- That is, if "foo:bar:baz" is used, this interpreted as
1870 -- consisting of three entries, 'foo', 'bar', 'baz'.
1871 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1872 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1874 -- Notice that no attempt is made to fully replace the 'standard'
1875 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1876 -- that this will cause too much breakage for users & ':' will
1877 -- work fine even with DOS paths, if you're not insisting on being silly.
1880 splitUp (x:':':div:xs) | div `elem` dir_markers
1881 = ((x:':':div:p): splitUp rs)
1883 (p,rs) = findNextPath xs
1884 -- we used to check for existence of the path here, but that
1885 -- required the IO monad to be threaded through the command-line
1886 -- parser which is quite inconvenient. The
1887 splitUp xs = cons p (splitUp rs)
1889 (p,rs) = findNextPath xs
1894 -- will be called either when we've consumed nought or the
1895 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1896 -- finding the next split marker.
1898 case break (`elem` split_markers) xs of
1899 (p, _:ds) -> (p, ds)
1902 split_markers :: [Char]
1903 split_markers = [':', ';']
1905 dir_markers :: [Char]
1906 dir_markers = ['/', '\\']
1909 -- -----------------------------------------------------------------------------
1910 -- tmpDir, where we store temporary files.
1912 setTmpDir :: FilePath -> DynFlags -> DynFlags
1913 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1914 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1915 -- seem necessary now --SDM 7/2/2008
1917 -----------------------------------------------------------------------------
1920 setOptHpcDir :: String -> DynP ()
1921 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1923 -----------------------------------------------------------------------------
1924 -- Via-C compilation stuff
1926 -- There are some options that we need to pass to gcc when compiling
1927 -- Haskell code via C, but are only supported by recent versions of
1928 -- gcc. The configure script decides which of these options we need,
1929 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1930 -- read before each via-C compilation. The advantage of having these
1931 -- in a separate file is that the file can be created at install-time
1932 -- depending on the available gcc version, and even re-generated later
1933 -- if gcc is upgraded.
1935 -- The options below are not dependent on the version of gcc, only the
1938 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1939 [String]) -- for registerised HC compilations
1940 machdepCCOpts _dflags
1941 #if alpha_TARGET_ARCH
1943 #ifdef HAVE_THREADED_RTS_SUPPORT
1947 -- For now, to suppress the gcc warning "call-clobbered
1948 -- register used for global register variable", we simply
1949 -- disable all warnings altogether using the -w flag. Oh well.
1951 #elif hppa_TARGET_ARCH
1952 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1953 -- (very nice, but too bad the HP /usr/include files don't agree.)
1954 = ( ["-D_HPUX_SOURCE"], [] )
1956 #elif m68k_TARGET_ARCH
1957 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1958 -- popping of args to routines to be explicit; if we let things
1959 -- be deferred 'til after an STGJUMP, imminent death is certain!
1961 -- -fomit-frame-pointer : *don't*
1962 -- It's better to have a6 completely tied up being a frame pointer
1963 -- rather than let GCC pick random things to do with it.
1964 -- (If we want to steal a6, then we would try to do things
1965 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1966 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1968 #elif i386_TARGET_ARCH
1969 -- -fno-defer-pop : basically the same game as for m68k
1971 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1972 -- the fp (%ebp) for our register maps.
1973 = let n_regs = stolen_x86_regs _dflags
1976 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1979 "-fomit-frame-pointer",
1980 -- we want -fno-builtin, because when gcc inlines
1981 -- built-in functions like memcpy() it tends to
1982 -- run out of registers, requiring -monly-n-regs
1984 "-DSTOLEN_X86_REGS="++show n_regs ]
1987 #elif ia64_TARGET_ARCH
1988 = ( [], ["-fomit-frame-pointer", "-G0"] )
1990 #elif x86_64_TARGET_ARCH
1991 = ( [], ["-fomit-frame-pointer",
1992 "-fno-asynchronous-unwind-tables",
1993 -- the unwind tables are unnecessary for HC code,
1994 -- and get in the way of -split-objs. Another option
1995 -- would be to throw them away in the mangler, but this
1998 -- calling builtins like strlen() using the FFI can
1999 -- cause gcc to run out of regs, so use the external
2003 #elif sparc_TARGET_ARCH
2005 -- For now, to suppress the gcc warning "call-clobbered
2006 -- register used for global register variable", we simply
2007 -- disable all warnings altogether using the -w flag. Oh well.
2009 #elif powerpc_apple_darwin_TARGET
2011 -- Disable Apple's precompiling preprocessor. It's a great thing
2012 -- for "normal" programs, but it doesn't support register variable
2014 = ( [], ["-no-cpp-precomp"] )
2019 picCCOpts :: DynFlags -> [String]
2021 #if darwin_TARGET_OS
2022 -- Apple prefers to do things the other way round.
2023 -- PIC is on by default.
2024 -- -mdynamic-no-pic:
2025 -- Turn off PIC code generation.
2027 -- Don't generate "common" symbols - these are unwanted
2028 -- in dynamic libraries.
2031 = ["-fno-common", "-D__PIC__"]
2033 = ["-mdynamic-no-pic"]
2034 #elif mingw32_TARGET_OS
2035 -- no -fPIC for Windows
2042 = ["-fPIC", "-D__PIC__"]
2047 -- -----------------------------------------------------------------------------
2051 can_split = cSplitObjs == "YES"
2053 -- -----------------------------------------------------------------------------
2056 compilerInfo :: [(String, String)]
2057 compilerInfo = [("Project name", cProjectName),
2058 ("Project version", cProjectVersion),
2059 ("Booter version", cBooterVersion),
2061 ("Interface file version", cHscIfaceFileVersion),
2062 ("Have interpreter", cGhcWithInterpreter),
2063 ("Object splitting", cSplitObjs),
2064 ("Have native code generator", cGhcWithNativeCodeGen),
2065 ("Support SMP", cGhcWithSMP),
2066 ("Unregisterised", cGhcUnregisterised),
2067 ("Tables next to code", cGhcEnableTablesNextToCode),
2068 ("Win32 DLLs", cEnableWin32DLLs),
2069 ("RTS ways", cGhcRTSWays),
2070 ("Leading underscore", cLeadingUnderscore),
2071 ("Debug on", show debugIsOn)