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 )
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.Monad ( when )
84 import System.FilePath
85 import System.IO ( stderr, hPutChar )
87 -- -----------------------------------------------------------------------------
95 | Opt_D_dump_cmmz_pretty
99 | Opt_D_dump_asm_native
100 | Opt_D_dump_asm_liveness
101 | Opt_D_dump_asm_coalesce
102 | Opt_D_dump_asm_regalloc
103 | Opt_D_dump_asm_regalloc_stages
104 | Opt_D_dump_asm_conflicts
105 | Opt_D_dump_asm_stats
111 | Opt_D_dump_inlinings
112 | Opt_D_dump_rule_firings
113 | Opt_D_dump_occur_anal
117 | Opt_D_dump_simpl_iterations
118 | Opt_D_dump_simpl_phases
127 | Opt_D_dump_worker_wrapper
128 | Opt_D_dump_rn_trace
129 | Opt_D_dump_rn_stats
131 | Opt_D_dump_simpl_stats
132 | Opt_D_dump_tc_trace
133 | Opt_D_dump_if_trace
139 | Opt_D_verbose_core2core
140 | Opt_D_verbose_stg2stg
142 | Opt_D_dump_hi_diffs
143 | Opt_D_dump_minimal_imports
144 | Opt_D_dump_mod_cycles
145 | Opt_D_dump_view_pattern_commoning
146 | Opt_D_faststring_stats
147 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
148 | Opt_D_no_debug_output
154 | Opt_WarnIsError -- -Werror; makes warnings fatal
155 | Opt_WarnDuplicateExports
157 | Opt_WarnImplicitPrelude
158 | Opt_WarnIncompletePatterns
159 | Opt_WarnIncompletePatternsRecUpd
160 | Opt_WarnMissingFields
161 | Opt_WarnMissingMethods
162 | Opt_WarnMissingSigs
163 | Opt_WarnNameShadowing
164 | Opt_WarnOverlappingPatterns
165 | Opt_WarnSimplePatterns
166 | Opt_WarnTypeDefaults
167 | Opt_WarnMonomorphism
168 | Opt_WarnUnusedBinds
169 | Opt_WarnUnusedImports
170 | Opt_WarnUnusedMatches
171 | Opt_WarnWarningsDeprecations
172 | Opt_WarnDeprecatedFlags
173 | Opt_WarnDodgyImports
176 | Opt_WarnUnrecognisedPragmas
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_WarnUnrecognisedPragmas,
797 Opt_WarnOverlappingPatterns,
798 Opt_WarnMissingFields,
799 Opt_WarnMissingMethods,
800 Opt_WarnDuplicateExports,
801 Opt_WarnDodgyForeignImports
804 minusWOpts :: [DynFlag]
806 = standardWarnings ++
807 [ Opt_WarnUnusedBinds,
808 Opt_WarnUnusedMatches,
809 Opt_WarnUnusedImports,
810 Opt_WarnIncompletePatterns,
814 minusWallOpts :: [DynFlag]
817 [ Opt_WarnTypeDefaults,
818 Opt_WarnNameShadowing,
824 -- minuswRemovesOpts should be every warning option
825 minuswRemovesOpts :: [DynFlag]
828 [Opt_WarnImplicitPrelude,
829 Opt_WarnIncompletePatternsRecUpd,
830 Opt_WarnSimplePatterns,
831 Opt_WarnMonomorphism,
832 Opt_WarnUnrecognisedPragmas,
836 -- -----------------------------------------------------------------------------
837 -- CoreToDo: abstraction of core-to-core passes to run.
839 data CoreToDo -- These are diff core-to-core passes,
840 -- which may be invoked in any order,
841 -- as many times as you like.
843 = CoreDoSimplify -- The core-to-core simplifier.
846 -- Each run of the simplifier can take a different
847 -- set of simplifier-specific flags.
849 | CoreDoFloatOutwards FloatOutSwitches
854 | CoreDoWorkerWrapper
857 | CoreDoOldStrictness
860 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
861 -- matching this string
862 | CoreDoVectorisation DPHBackend
863 | CoreDoNothing -- Useful when building up
864 | CoreDoPasses [CoreToDo] -- lists of these things
866 data SimplifierMode -- See comments in SimplMonad
868 | SimplPhase Int [String]
870 data SimplifierSwitch
871 = MaxSimplifierIterations Int
874 data FloatOutSwitches
875 = FloatOutSw Bool -- True <=> float lambdas to top level
876 Bool -- True <=> float constants to top level,
877 -- even if they do not escape a lambda
880 -- The core-to-core pass ordering is derived from the DynFlags:
881 runWhen :: Bool -> CoreToDo -> CoreToDo
882 runWhen True do_this = do_this
883 runWhen False _ = CoreDoNothing
885 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
886 runMaybe (Just x) f = f x
887 runMaybe Nothing _ = CoreDoNothing
889 getCoreToDo :: DynFlags -> [CoreToDo]
891 | Just todo <- coreToDo dflags = todo -- set explicitly by user
892 | otherwise = core_todo
894 opt_level = optLevel dflags
895 phases = simplPhases dflags
896 max_iter = maxSimplIterations dflags
897 strictness = dopt Opt_Strictness dflags
898 full_laziness = dopt Opt_FullLaziness dflags
899 cse = dopt Opt_CSE dflags
900 spec_constr = dopt Opt_SpecConstr dflags
901 liberate_case = dopt Opt_LiberateCase dflags
902 rule_check = ruleCheck dflags
903 static_args = dopt Opt_StaticArgumentTransformation dflags
905 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
907 simpl_phase phase names iter
909 [ CoreDoSimplify (SimplPhase phase names) [
910 MaxSimplifierIterations iter
912 maybe_rule_check phase
916 = runWhen (dopt Opt_Vectorise dflags)
917 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
920 -- By default, we have 2 phases before phase 0.
922 -- Want to run with inline phase 2 after the specialiser to give
923 -- maximum chance for fusion to work before we inline build/augment
924 -- in phase 1. This made a difference in 'ansi' where an
925 -- overloaded function wasn't inlined till too late.
927 -- Need phase 1 so that build/augment get
928 -- inlined. I found that spectral/hartel/genfft lost some useful
929 -- strictness in the function sumcode' if augment is not inlined
930 -- before strictness analysis runs
931 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
932 | phase <- [phases, phases-1 .. 1] ]
935 -- initial simplify: mk specialiser happy: minimum effort please
936 simpl_gently = CoreDoSimplify SimplGently [
938 -- Don't inline anything till full laziness has bitten
939 -- In particular, inlining wrappers inhibits floating
940 -- e.g. ...(case f x of ...)...
941 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
942 -- ==> ...(case x of I# x# -> case fw x# of ...)...
943 -- and now the redex (f x) isn't floatable any more
944 -- Similarly, don't apply any rules until after full
945 -- laziness. Notably, list fusion can prevent floating.
947 NoCaseOfCase, -- Don't do case-of-case transformations.
948 -- This makes full laziness work better
949 MaxSimplifierIterations max_iter
953 if opt_level == 0 then
955 simpl_phase 0 ["final"] max_iter]
956 else {- opt_level >= 1 -} [
958 -- We want to do the static argument transform before full laziness as it
959 -- may expose extra opportunities to float things outwards. However, to fix
960 -- up the output of the transformation we need at do at least one simplify
961 -- after this before anything else
962 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
964 -- We run vectorisation here for now, but we might also try to run
968 -- initial simplify: mk specialiser happy: minimum effort please
971 -- Specialisation is best done before full laziness
972 -- so that overloaded functions have all their dictionary lambdas manifest
975 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
981 -- Phase 0: allow all Ids to be inlined now
982 -- This gets foldr inlined before strictness analysis
984 -- At least 3 iterations because otherwise we land up with
985 -- huge dead expressions because of an infelicity in the
987 -- let k = BIG in foldr k z xs
988 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
989 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
991 simpl_phase 0 ["main"] (max max_iter 3),
994 #ifdef OLD_STRICTNESS
997 runWhen strictness (CoreDoPasses [
1001 simpl_phase 0 ["post-worker-wrapper"] max_iter
1004 runWhen full_laziness
1005 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1006 True)), -- Float constants
1007 -- nofib/spectral/hartel/wang doubles in speed if you
1008 -- do full laziness late in the day. It only happens
1009 -- after fusion and other stuff, so the early pass doesn't
1010 -- catch it. For the record, the redex is
1011 -- f_el22 (f_el21 r_midblock)
1014 runWhen cse CoreCSE,
1015 -- We want CSE to follow the final full-laziness pass, because it may
1016 -- succeed in commoning up things floated out by full laziness.
1017 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1023 -- Case-liberation for -O2. This should be after
1024 -- strictness analysis and the simplification which follows it.
1025 runWhen liberate_case (CoreDoPasses [
1027 simpl_phase 0 ["post-liberate-case"] max_iter
1028 ]), -- Run the simplifier after LiberateCase to vastly
1029 -- reduce the possiblility of shadowing
1030 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1032 runWhen spec_constr CoreDoSpecConstr,
1036 -- Final clean-up simplification:
1037 simpl_phase 0 ["final"] max_iter
1040 -- -----------------------------------------------------------------------------
1041 -- StgToDo: abstraction of stg-to-stg passes to run.
1044 = StgDoMassageForProfiling -- should be (next to) last
1045 -- There's also setStgVarInfo, but its absolute "lastness"
1046 -- is so critical that it is hardwired in (no flag).
1049 getStgToDo :: DynFlags -> [StgToDo]
1051 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1054 stg_stats = dopt Opt_StgStats dflags
1056 todo1 = if stg_stats then [D_stg_stats] else []
1058 todo2 | WayProf `elem` wayNames dflags
1059 = StgDoMassageForProfiling : todo1
1063 -- -----------------------------------------------------------------------------
1066 allFlags :: [String]
1067 allFlags = map ('-':) $
1068 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1069 map ("fno-"++) flags ++
1070 map ("f"++) flags ++
1071 map ("X"++) supportedLanguages ++
1072 map ("XNo"++) supportedLanguages
1073 where ok (PrefixPred _ _) = False
1075 flags = [ name | (name, _, _) <- fFlags ]
1077 dynamic_flags :: [Flag DynP]
1079 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1080 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1081 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1082 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1083 , Flag "v" (OptIntSuffix setVerbosity) Supported
1085 ------- Specific phases --------------------------------------------
1086 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1087 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1088 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1089 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1090 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1091 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1092 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1093 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1094 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1095 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1097 , Flag "optL" (HasArg (upd . addOptL)) Supported
1098 , Flag "optP" (HasArg (upd . addOptP)) Supported
1099 , Flag "optF" (HasArg (upd . addOptF)) Supported
1100 , Flag "optc" (HasArg (upd . addOptc)) Supported
1101 , Flag "optm" (HasArg (upd . addOptm)) Supported
1102 , Flag "opta" (HasArg (upd . addOpta)) Supported
1103 , Flag "optl" (HasArg (upd . addOptl)) Supported
1104 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1107 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1110 -------- ghc -M -----------------------------------------------------
1111 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1112 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1113 (Deprecated "Use -dep-suffix instead")
1114 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1115 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1116 (Deprecated "Use -dep-makefile instead")
1117 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1118 (Deprecated "-optdep-w doesn't do anything")
1119 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1120 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1121 (Deprecated "Use -include-pkg-deps instead")
1122 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1123 (Deprecated "Use -include-pkg-deps instead")
1124 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1125 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1126 (Deprecated "Use -exclude-module instead")
1127 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1128 (Deprecated "Use -exclude-module instead")
1130 -------- Linking ----------------------------------------------------
1131 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1133 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1134 (Deprecated "Use -c instead")
1135 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1137 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1140 ------- Libraries ---------------------------------------------------
1141 , Flag "L" (Prefix addLibraryPath ) Supported
1142 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1144 ------- Frameworks --------------------------------------------------
1145 -- -framework-path should really be -F ...
1146 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1147 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1149 ------- Output Redirection ------------------------------------------
1150 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1151 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1152 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1153 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1154 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1155 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1156 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1157 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1158 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1159 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1162 ------- Keeping temporary files -------------------------------------
1163 -- These can be singular (think ghc -c) or plural (think ghc --make)
1164 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1165 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1166 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1167 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1168 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1169 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1170 -- This only makes sense as plural
1171 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1173 ------- Miscellaneous ----------------------------------------------
1174 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1175 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1176 , Flag "main-is" (SepArg setMainIs ) Supported
1177 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1178 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1179 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1181 ------- recompilation checker --------------------------------------
1182 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1183 (Deprecated "Use -fno-force-recomp instead")
1184 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1185 (Deprecated "Use -fforce-recomp instead")
1187 ------- Packages ----------------------------------------------------
1188 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1189 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1191 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1192 , Flag "package" (HasArg exposePackage) Supported
1193 , Flag "hide-package" (HasArg hidePackage) Supported
1194 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1196 , Flag "ignore-package" (HasArg ignorePackage)
1198 , Flag "syslib" (HasArg exposePackage)
1199 (Deprecated "Use -package instead")
1201 ------ HsCpp opts ---------------------------------------------------
1202 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1203 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1205 ------- Include/Import Paths ----------------------------------------
1206 , Flag "I" (Prefix addIncludePath) Supported
1207 , Flag "i" (OptPrefix addImportPath ) Supported
1209 ------ Debugging ----------------------------------------------------
1210 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1212 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1214 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1216 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1218 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1220 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1222 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1224 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1226 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1228 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1230 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1232 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1234 , Flag "ddump-asm-regalloc-stages"
1235 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1237 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1239 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1241 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1243 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1245 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1247 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1249 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1251 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1253 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1255 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1257 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1259 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1261 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1263 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1265 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1267 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1269 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1271 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1273 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1275 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1277 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1279 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1281 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1283 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1285 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1287 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1289 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1291 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1293 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1295 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1297 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1299 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1301 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1303 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1305 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1307 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1309 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1311 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1313 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1315 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1317 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1319 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1322 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1324 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1326 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1328 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1330 , Flag "dshow-passes"
1331 (NoArg (do setDynFlag Opt_ForceRecomp
1332 setVerbosity (Just 2)))
1334 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1337 ------ Machine dependant (-m<blah>) stuff ---------------------------
1339 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1341 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1343 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1346 ------ Warning opts -------------------------------------------------
1347 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1349 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1351 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1353 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1355 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1356 (Deprecated "Use -w instead")
1357 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1360 ------ Optimisation flags ------------------------------------------
1361 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1362 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1363 (Deprecated "Use -O0 instead")
1364 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1365 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1367 -- If the number is missing, use 1
1369 , Flag "fsimplifier-phases"
1370 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1372 , Flag "fmax-simplifier-iterations"
1373 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1376 , Flag "fspec-constr-threshold"
1377 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1379 , Flag "fno-spec-constr-threshold"
1380 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1382 , Flag "fspec-constr-count"
1383 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1385 , Flag "fno-spec-constr-count"
1386 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1388 , Flag "fliberate-case-threshold"
1389 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1391 , Flag "fno-liberate-case-threshold"
1392 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1395 , Flag "frule-check"
1396 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1398 , Flag "fcontext-stack"
1399 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1402 ------ DPH flags ----------------------------------------------------
1405 (NoArg (upd (setDPHBackend DPHSeq)))
1408 (NoArg (upd (setDPHBackend DPHPar)))
1411 ------ Compiler flags -----------------------------------------------
1413 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1414 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1415 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1417 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1418 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1419 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1421 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1423 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1426 ++ map (mkFlag True "f" setDynFlag ) fFlags
1427 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1428 ++ map (mkFlag True "X" setDynFlag ) xFlags
1429 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1431 mkFlag :: Bool -- True => turn it on, False => turn it off
1433 -> (DynFlag -> DynP ())
1434 -> (String, DynFlag, Bool -> Deprecated)
1436 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1437 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1439 deprecatedForLanguage :: String -> Bool -> Deprecated
1440 deprecatedForLanguage lang turnOn =
1441 Deprecated ("Use the " ++ prefix ++ lang ++ " language instead")
1442 where prefix = if turnOn then "" else "No"
1444 -- these -f<blah> flags can all be reversed with -fno-<blah>
1446 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1448 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1449 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1450 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1451 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1452 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1453 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1454 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1455 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1456 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1457 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1458 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1459 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1460 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1461 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1462 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1463 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1464 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1465 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1466 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1467 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1468 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1469 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1470 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1471 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1472 ( "strictness", Opt_Strictness, const Supported ),
1473 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1474 ( "full-laziness", Opt_FullLaziness, const Supported ),
1475 ( "liberate-case", Opt_LiberateCase, const Supported ),
1476 ( "spec-constr", Opt_SpecConstr, const Supported ),
1477 ( "cse", Opt_CSE, const Supported ),
1478 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1479 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1480 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1481 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1482 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1483 ( "case-merge", Opt_CaseMerge, const Supported ),
1484 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1485 ( "method-sharing", Opt_MethodSharing, const Supported ),
1486 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1487 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1488 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1489 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1490 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1491 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1492 ( "rewrite-rules", Opt_RewriteRules, const Supported ),
1493 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1494 ( "break-on-error", Opt_BreakOnError, const Supported ),
1495 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1496 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1497 ( "run-cps", Opt_RunCPSZ, const Supported ),
1498 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1499 ( "vectorise", Opt_Vectorise, const Supported ),
1500 ( "regs-graph", Opt_RegsGraph, const Supported ),
1501 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1502 ( "th", Opt_TemplateHaskell,
1503 deprecatedForLanguage "TemplateHaskell" ),
1504 ( "fi", Opt_ForeignFunctionInterface,
1505 deprecatedForLanguage "ForeignFunctionInterface" ),
1506 ( "ffi", Opt_ForeignFunctionInterface,
1507 deprecatedForLanguage "ForeignFunctionInterface" ),
1508 ( "arrows", Opt_Arrows,
1509 deprecatedForLanguage "Arrows" ),
1510 ( "generics", Opt_Generics,
1511 deprecatedForLanguage "Generics" ),
1512 ( "implicit-prelude", Opt_ImplicitPrelude,
1513 deprecatedForLanguage "ImplicitPrelude" ),
1514 ( "bang-patterns", Opt_BangPatterns,
1515 deprecatedForLanguage "BangPatterns" ),
1516 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1517 deprecatedForLanguage "MonomorphismRestriction" ),
1518 ( "mono-pat-binds", Opt_MonoPatBinds,
1519 deprecatedForLanguage "MonoPatBinds" ),
1520 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1521 deprecatedForLanguage "ExtendedDefaultRules" ),
1522 ( "implicit-params", Opt_ImplicitParams,
1523 deprecatedForLanguage "ImplicitParams" ),
1524 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1525 deprecatedForLanguage "ScopedTypeVariables" ),
1527 deprecatedForLanguage "PArr" ),
1528 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1529 deprecatedForLanguage "OverlappingInstances" ),
1530 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1531 deprecatedForLanguage "UndecidableInstances" ),
1532 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1533 deprecatedForLanguage "IncoherentInstances" ),
1534 ( "gen-manifest", Opt_GenManifest, const Supported ),
1535 ( "embed-manifest", Opt_EmbedManifest, const Supported )
1538 supportedLanguages :: [String]
1539 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1541 -- This may contain duplicates
1542 languageOptions :: [DynFlag]
1543 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1545 -- These -X<blah> flags can all be reversed with -XNo<blah>
1546 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1548 ( "CPP", Opt_Cpp, const Supported ),
1549 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1550 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1551 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1552 ( "MagicHash", Opt_MagicHash, const Supported ),
1553 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1554 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1555 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1556 ( "PatternSignatures", Opt_PatternSignatures, const Supported ),
1557 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1558 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1559 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1560 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1561 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1562 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1563 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1564 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1565 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1566 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1567 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1568 ( "Arrows", Opt_Arrows, const Supported ),
1569 ( "PArr", Opt_PArr, const Supported ),
1570 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1571 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1572 ( "Generics", Opt_Generics, const Supported ),
1574 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1575 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1576 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1577 ( "RecordPuns", Opt_RecordPuns,
1578 deprecatedForLanguage "NamedFieldPuns" ),
1579 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1580 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1581 ( "GADTs", Opt_GADTs, const Supported ),
1582 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1583 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1584 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1586 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1587 -- On by default (which is not strictly H98):
1588 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1589 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1590 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1591 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1592 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1593 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1594 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1595 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1596 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1597 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1598 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1599 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1600 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1601 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1602 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1603 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1604 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1605 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported )
1608 impliedFlags :: [(DynFlag, [DynFlag])]
1610 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1611 -- be completely rigid for GADTs
1612 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1613 -- Note [Scoped tyvars] in TcBinds
1616 glasgowExtsFlags :: [DynFlag]
1617 glasgowExtsFlags = [
1618 Opt_PrintExplicitForalls
1619 , Opt_ForeignFunctionInterface
1620 , Opt_UnliftedFFITypes
1622 , Opt_ImplicitParams
1623 , Opt_ScopedTypeVariables
1625 , Opt_TypeSynonymInstances
1626 , Opt_StandaloneDeriving
1627 , Opt_DeriveDataTypeable
1628 , Opt_FlexibleContexts
1629 , Opt_FlexibleInstances
1630 , Opt_ConstrainedClassMethods
1631 , Opt_MultiParamTypeClasses
1632 , Opt_FunctionalDependencies
1634 , Opt_PolymorphicComponents
1635 , Opt_ExistentialQuantification
1637 , Opt_PostfixOperators
1639 , Opt_LiberalTypeSynonyms
1641 , Opt_ImpredicativeTypes
1644 , Opt_ParallelListComp
1645 , Opt_EmptyDataDecls
1646 , Opt_KindSignatures
1647 , Opt_PatternSignatures
1648 , Opt_GeneralizedNewtypeDeriving
1649 , Opt_TypeFamilies ]
1651 -- -----------------------------------------------------------------------------
1652 -- Parsing the dynamic flags.
1654 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags, [String], [String])
1655 parseDynamicFlags dflags args = do
1656 -- XXX Legacy support code
1657 -- We used to accept things like
1658 -- optdep-f -optdepdepend
1659 -- optdep-f -optdep depend
1660 -- optdep -f -optdepdepend
1661 -- optdep -f -optdep depend
1662 -- but the spaces trip up proper argument handling. So get rid of them.
1663 let f ("-optdep" : x : xs) = ("-optdep" ++ x) : f xs
1664 f (x : xs) = x : f xs
1667 let ((leftover, errs, warns), dflags')
1668 = runCmdLine (processArgs dynamic_flags args') dflags
1669 when (not (null errs)) $ do
1670 ghcError (UsageError (unlines errs))
1671 return (dflags', leftover, warns)
1673 type DynP = CmdLineP DynFlags
1675 upd :: (DynFlags -> DynFlags) -> DynP ()
1677 dfs <- getCmdLineState
1678 putCmdLineState $! (f dfs)
1680 --------------------------
1681 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1682 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1684 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1685 -- When you set f, set the ones it implies
1686 -- When you un-set f, however, we don't un-set the things it implies
1687 -- (except for -fno-glasgow-exts, which is treated specially)
1689 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1691 --------------------------
1692 setDumpFlag :: DynFlag -> OptKind DynP
1693 setDumpFlag dump_flag
1694 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1695 | otherwise = NoArg (setDynFlag dump_flag)
1697 -- Whenver we -ddump, switch off the recompilation checker,
1698 -- else you don't see the dump!
1699 -- However, certain dumpy-things are really interested in what's going
1700 -- on during recompilation checking, so in those cases we
1701 -- don't want to turn it off.
1702 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1703 Opt_D_dump_hi_diffs]
1705 setVerboseCore2Core :: DynP ()
1706 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1707 setDynFlag Opt_D_verbose_core2core
1708 upd (\s -> s { shouldDumpSimplPhase = const True })
1710 setDumpSimplPhases :: String -> DynP ()
1711 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1712 upd (\s -> s { shouldDumpSimplPhase = spec })
1714 spec :: SimplifierMode -> Bool
1716 . map (join (&&) . map match . split ':')
1722 join :: (Bool -> Bool -> Bool)
1723 -> [SimplifierMode -> Bool]
1724 -> SimplifierMode -> Bool
1725 join _ [] = const True
1726 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1728 match :: String -> SimplifierMode -> Bool
1729 match "" = const True
1730 match s = case reads s of
1731 [(n,"")] -> phase_num n
1734 phase_num :: Int -> SimplifierMode -> Bool
1735 phase_num n (SimplPhase k _) = n == k
1736 phase_num _ _ = False
1738 phase_name :: String -> SimplifierMode -> Bool
1739 phase_name s SimplGently = s == "gentle"
1740 phase_name s (SimplPhase _ ss) = s `elem` ss
1742 setVerbosity :: Maybe Int -> DynP ()
1743 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1745 addCmdlineHCInclude :: String -> DynP ()
1746 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1748 extraPkgConf_ :: FilePath -> DynP ()
1749 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1751 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1753 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1755 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1757 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1759 setPackageName :: String -> DynFlags -> DynFlags
1761 | Nothing <- unpackPackageId pid
1762 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1764 = \s -> s{ thisPackage = pid }
1766 pid = stringToPackageId p
1768 -- If we're linking a binary, then only targets that produce object
1769 -- code are allowed (requests for other target types are ignored).
1770 setTarget :: HscTarget -> DynP ()
1771 setTarget l = upd set
1774 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1777 -- Changes the target only if we're compiling object code. This is
1778 -- used by -fasm and -fvia-C, which switch from one to the other, but
1779 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1780 -- can be safely used in an OPTIONS_GHC pragma.
1781 setObjTarget :: HscTarget -> DynP ()
1782 setObjTarget l = upd set
1785 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1788 setOptLevel :: Int -> DynFlags -> DynFlags
1789 setOptLevel n dflags
1790 | hscTarget dflags == HscInterpreted && n > 0
1792 -- not in IO any more, oh well:
1793 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1795 = updOptLevel n dflags
1798 -- -Odph is equivalent to
1800 -- -O2 optimise as much as possible
1801 -- -fno-method-sharing sharing specialisation defeats fusion
1803 -- -fdicts-cheap always inline dictionaries
1804 -- -fmax-simplifier-iterations20 this is necessary sometimes
1805 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1807 setDPHOpt :: DynFlags -> DynFlags
1808 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1809 , specConstrThreshold = Nothing
1811 `dopt_set` Opt_DictsCheap
1812 `dopt_unset` Opt_MethodSharing
1814 data DPHBackend = DPHPar
1817 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1818 setDPHBackend backend dflags = dflags { dphBackend = backend }
1821 setMainIs :: String -> DynP ()
1823 | not (null main_fn) && isLower (head main_fn)
1824 -- The arg looked like "Foo.Bar.baz"
1825 = upd $ \d -> d{ mainFunIs = Just main_fn,
1826 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1828 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1829 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1831 | otherwise -- The arg looked like "baz"
1832 = upd $ \d -> d{ mainFunIs = Just arg }
1834 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1836 -----------------------------------------------------------------------------
1837 -- Paths & Libraries
1839 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1841 -- -i on its own deletes the import paths
1842 addImportPath "" = upd (\s -> s{importPaths = []})
1843 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1847 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1850 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1852 addFrameworkPath p =
1853 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1855 #ifndef mingw32_TARGET_OS
1856 split_marker :: Char
1857 split_marker = ':' -- not configurable (ToDo)
1860 splitPathList :: String -> [String]
1861 splitPathList s = filter notNull (splitUp s)
1862 -- empty paths are ignored: there might be a trailing
1863 -- ':' in the initial list, for example. Empty paths can
1864 -- cause confusion when they are translated into -I options
1865 -- for passing to gcc.
1867 #ifndef mingw32_TARGET_OS
1868 splitUp xs = split split_marker xs
1870 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1872 -- That is, if "foo:bar:baz" is used, this interpreted as
1873 -- consisting of three entries, 'foo', 'bar', 'baz'.
1874 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1875 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1877 -- Notice that no attempt is made to fully replace the 'standard'
1878 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1879 -- that this will cause too much breakage for users & ':' will
1880 -- work fine even with DOS paths, if you're not insisting on being silly.
1883 splitUp (x:':':div:xs) | div `elem` dir_markers
1884 = ((x:':':div:p): splitUp rs)
1886 (p,rs) = findNextPath xs
1887 -- we used to check for existence of the path here, but that
1888 -- required the IO monad to be threaded through the command-line
1889 -- parser which is quite inconvenient. The
1890 splitUp xs = cons p (splitUp rs)
1892 (p,rs) = findNextPath xs
1897 -- will be called either when we've consumed nought or the
1898 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1899 -- finding the next split marker.
1901 case break (`elem` split_markers) xs of
1902 (p, _:ds) -> (p, ds)
1905 split_markers :: [Char]
1906 split_markers = [':', ';']
1908 dir_markers :: [Char]
1909 dir_markers = ['/', '\\']
1912 -- -----------------------------------------------------------------------------
1913 -- tmpDir, where we store temporary files.
1915 setTmpDir :: FilePath -> DynFlags -> DynFlags
1916 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1917 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1918 -- seem necessary now --SDM 7/2/2008
1920 -----------------------------------------------------------------------------
1923 setOptHpcDir :: String -> DynP ()
1924 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1926 -----------------------------------------------------------------------------
1927 -- Via-C compilation stuff
1929 -- There are some options that we need to pass to gcc when compiling
1930 -- Haskell code via C, but are only supported by recent versions of
1931 -- gcc. The configure script decides which of these options we need,
1932 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1933 -- read before each via-C compilation. The advantage of having these
1934 -- in a separate file is that the file can be created at install-time
1935 -- depending on the available gcc version, and even re-generated later
1936 -- if gcc is upgraded.
1938 -- The options below are not dependent on the version of gcc, only the
1941 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1942 [String]) -- for registerised HC compilations
1943 machdepCCOpts _dflags
1944 #if alpha_TARGET_ARCH
1946 #ifdef HAVE_THREADED_RTS_SUPPORT
1950 -- For now, to suppress the gcc warning "call-clobbered
1951 -- register used for global register variable", we simply
1952 -- disable all warnings altogether using the -w flag. Oh well.
1954 #elif hppa_TARGET_ARCH
1955 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1956 -- (very nice, but too bad the HP /usr/include files don't agree.)
1957 = ( ["-D_HPUX_SOURCE"], [] )
1959 #elif m68k_TARGET_ARCH
1960 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1961 -- popping of args to routines to be explicit; if we let things
1962 -- be deferred 'til after an STGJUMP, imminent death is certain!
1964 -- -fomit-frame-pointer : *don't*
1965 -- It's better to have a6 completely tied up being a frame pointer
1966 -- rather than let GCC pick random things to do with it.
1967 -- (If we want to steal a6, then we would try to do things
1968 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1969 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1971 #elif i386_TARGET_ARCH
1972 -- -fno-defer-pop : basically the same game as for m68k
1974 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1975 -- the fp (%ebp) for our register maps.
1976 = let n_regs = stolen_x86_regs _dflags
1979 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1982 "-fomit-frame-pointer",
1983 -- we want -fno-builtin, because when gcc inlines
1984 -- built-in functions like memcpy() it tends to
1985 -- run out of registers, requiring -monly-n-regs
1987 "-DSTOLEN_X86_REGS="++show n_regs ]
1990 #elif ia64_TARGET_ARCH
1991 = ( [], ["-fomit-frame-pointer", "-G0"] )
1993 #elif x86_64_TARGET_ARCH
1994 = ( [], ["-fomit-frame-pointer",
1995 "-fno-asynchronous-unwind-tables",
1996 -- the unwind tables are unnecessary for HC code,
1997 -- and get in the way of -split-objs. Another option
1998 -- would be to throw them away in the mangler, but this
2001 -- calling builtins like strlen() using the FFI can
2002 -- cause gcc to run out of regs, so use the external
2006 #elif sparc_TARGET_ARCH
2008 -- For now, to suppress the gcc warning "call-clobbered
2009 -- register used for global register variable", we simply
2010 -- disable all warnings altogether using the -w flag. Oh well.
2012 #elif powerpc_apple_darwin_TARGET
2014 -- Disable Apple's precompiling preprocessor. It's a great thing
2015 -- for "normal" programs, but it doesn't support register variable
2017 = ( [], ["-no-cpp-precomp"] )
2022 picCCOpts :: DynFlags -> [String]
2024 #if darwin_TARGET_OS
2025 -- Apple prefers to do things the other way round.
2026 -- PIC is on by default.
2027 -- -mdynamic-no-pic:
2028 -- Turn off PIC code generation.
2030 -- Don't generate "common" symbols - these are unwanted
2031 -- in dynamic libraries.
2034 = ["-fno-common", "-D__PIC__"]
2036 = ["-mdynamic-no-pic"]
2037 #elif mingw32_TARGET_OS
2038 -- no -fPIC for Windows
2045 = ["-fPIC", "-D__PIC__"]
2050 -- -----------------------------------------------------------------------------
2054 can_split = cSplitObjs == "YES"
2056 -- -----------------------------------------------------------------------------
2059 compilerInfo :: [(String, String)]
2060 compilerInfo = [("Project name", cProjectName),
2061 ("Project version", cProjectVersion),
2062 ("Booter version", cBooterVersion),
2064 ("Interface file version", cHscIfaceFileVersion),
2065 ("Have interpreter", cGhcWithInterpreter),
2066 ("Object splitting", cSplitObjs),
2067 ("Have native code generator", cGhcWithNativeCodeGen),
2068 ("Support SMP", cGhcWithSMP),
2069 ("Unregisterised", cGhcUnregisterised),
2070 ("Tables next to code", cGhcEnableTablesNextToCode),
2071 ("Win32 DLLs", cEnableWin32DLLs),
2072 ("RTS ways", cGhcRTSWays),
2073 ("Leading underscore", cLeadingUnderscore),
2074 ("Debug on", show debugIsOn)