2 {-# OPTIONS -fno-warn-missing-fields #-}
3 -----------------------------------------------------------------------------
7 -- Most flags are dynamic flags, which means they can change from
8 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
9 -- multi-session GHC each session can be using different dynamic
10 -- flags. Dynamic flags can also be set at the prompt in GHCi.
12 -- (c) The University of Glasgow 2005
14 -----------------------------------------------------------------------------
17 -- The above warning supression flag is a temporary kludge.
18 -- While working on this module you are encouraged to remove it and fix
19 -- any warnings in the module. See
20 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
27 HscTarget(..), isObjectTarget, defaultObjectTarget,
28 GhcMode(..), isOneShot,
29 GhcLink(..), isNoLink,
33 -- Configuration of the core-to-core and stg-to-stg phases
37 SimplifierMode(..), FloatOutSwitches(..),
38 getCoreToDo, getStgToDo,
40 -- Manipulating DynFlags
41 defaultDynFlags, -- DynFlags
42 initDynFlags, -- DynFlags -> IO DynFlags
44 dopt, -- DynFlag -> DynFlags -> Bool
45 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
46 getOpts, -- (DynFlags -> [a]) -> IO [a]
57 machdepCCOpts, picCCOpts,
62 #include "HsVersions.h"
64 import Module ( Module, mkModuleName, mkModule, ModLocation )
66 import PrelNames ( mAIN )
67 #ifdef i386_TARGET_ARCH
68 import StaticFlags ( opt_Static )
70 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
72 import {-# SOURCE #-} Packages (PackageState)
73 import DriverPhases ( Phase(..), phaseInputExt )
76 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
77 import Panic ( panic, GhcException(..) )
78 import UniqFM ( UniqFM )
80 import Maybes ( orElse, fromJust )
81 import SrcLoc ( SrcSpan )
83 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
85 import Data.IORef ( readIORef )
86 import Control.Exception ( throwDyn )
87 import Control.Monad ( when )
88 #ifdef mingw32_TARGET_OS
89 import Data.List ( isPrefixOf )
94 import Data.Char ( isUpper )
95 import System.IO ( hPutStrLn, stderr )
97 -- -----------------------------------------------------------------------------
108 | Opt_D_dump_asm_native
109 | Opt_D_dump_asm_liveness
110 | Opt_D_dump_asm_coalesce
111 | Opt_D_dump_asm_regalloc
112 | Opt_D_dump_asm_regalloc_stages
113 | Opt_D_dump_asm_conflicts
114 | Opt_D_dump_asm_stats
120 | Opt_D_dump_inlinings
121 | Opt_D_dump_rule_firings
122 | Opt_D_dump_occur_anal
126 | Opt_D_dump_simpl_iterations
135 | Opt_D_dump_worker_wrapper
136 | Opt_D_dump_rn_trace
137 | Opt_D_dump_rn_stats
139 | Opt_D_dump_simpl_stats
140 | Opt_D_dump_tc_trace
141 | Opt_D_dump_if_trace
147 | Opt_D_verbose_core2core
148 | Opt_D_verbose_stg2stg
150 | Opt_D_dump_hi_diffs
151 | Opt_D_dump_minimal_imports
152 | Opt_D_dump_mod_cycles
153 | Opt_D_faststring_stats
154 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
159 | Opt_WarnIsError -- -Werror; makes warnings fatal
160 | Opt_WarnDuplicateExports
162 | Opt_WarnImplicitPrelude
163 | Opt_WarnIncompletePatterns
164 | Opt_WarnIncompletePatternsRecUpd
165 | Opt_WarnMissingFields
166 | Opt_WarnMissingMethods
167 | Opt_WarnMissingSigs
168 | Opt_WarnNameShadowing
169 | Opt_WarnOverlappingPatterns
170 | Opt_WarnSimplePatterns
171 | Opt_WarnTypeDefaults
172 | Opt_WarnMonomorphism
173 | Opt_WarnUnusedBinds
174 | Opt_WarnUnusedImports
175 | Opt_WarnUnusedMatches
176 | Opt_WarnDeprecations
177 | Opt_WarnDodgyImports
182 | Opt_OverlappingInstances
183 | Opt_UndecidableInstances
184 | Opt_IncoherentInstances
185 | Opt_MonomorphismRestriction
187 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
188 | Opt_ForeignFunctionInterface
189 | Opt_UnliftedFFITypes
190 | Opt_PArr -- Syntactic support for parallel arrays
191 | Opt_Arrows -- Arrow-notation syntax
192 | Opt_TemplateHaskell
195 | Opt_ImplicitPrelude
196 | Opt_ScopedTypeVariables
200 | Opt_OverloadedStrings
201 | Opt_DisambiguateRecordFields
202 | 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_GeneralizedNewtypeDeriving
225 | Opt_PartiallyAppliedClosedTypeSynonyms
230 | Opt_PrintExplicitForalls
238 | Opt_IgnoreInterfacePragmas
239 | Opt_OmitInterfacePragmas
240 | Opt_DoLambdaEtaExpansion
242 | Opt_IgnoreBreakpoints
245 | Opt_UnboxStrictFields
257 | Opt_ExcessPrecision
258 | Opt_ReadUserPackageConf
262 | Opt_HideAllPackages
263 | Opt_PrintBindResult
266 | Opt_BreakOnException
270 | Opt_ConvertToZipCfgAndBack
281 data DynFlags = DynFlags {
284 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
285 stgToDo :: Maybe [StgToDo], -- similarly
286 hscTarget :: HscTarget,
287 hscOutName :: String, -- name of the output file
288 extCoreName :: String, -- name of the .core output file
289 verbosity :: Int, -- verbosity level
290 optLevel :: Int, -- optimisation level
291 maxSimplIterations :: Int, -- max simplifier iterations
292 ruleCheck :: Maybe String,
294 specThreshold :: Int, -- Threshold for function specialisation
296 stolen_x86_regs :: Int,
297 cmdlineHcIncludes :: [String], -- -#includes
298 importPaths :: [FilePath],
300 mainFunIs :: Maybe String,
301 ctxtStkDepth :: Int, -- Typechecker context stack depth
303 thisPackage :: PackageId,
306 wayNames :: [WayName], -- way flags from the cmd line
307 buildTag :: String, -- the global "way" (eg. "p" for prof)
308 rtsBuildTag :: String, -- the RTS "way"
311 objectDir :: Maybe String,
312 hiDir :: Maybe String,
313 stubDir :: Maybe String,
319 outputFile :: Maybe String,
320 outputHi :: Maybe String,
322 -- | This is set by DriverPipeline.runPipeline based on where
323 -- its output is going.
324 dumpPrefix :: Maybe FilePath,
326 -- | Override the dumpPrefix set by runPipeline.
327 -- Set by -ddump-file-prefix
328 dumpPrefixForce :: Maybe FilePath,
330 includePaths :: [String],
331 libraryPaths :: [String],
332 frameworkPaths :: [String], -- used on darwin only
333 cmdlineFrameworks :: [String], -- ditto
334 tmpDir :: String, -- no trailing '/'
336 ghcUsagePath :: FilePath, -- Filled in by SysTools
337 ghciUsagePath :: FilePath, -- ditto
339 hpcDir :: String, -- ^ path to store the .mix files
341 -- options for particular phases
350 opt_windres :: [String],
352 -- commands for particular phases
354 pgm_P :: (String,[Option]),
356 pgm_c :: (String,[Option]),
357 pgm_m :: (String,[Option]),
358 pgm_s :: (String,[Option]),
359 pgm_a :: (String,[Option]),
360 pgm_l :: (String,[Option]),
361 pgm_dll :: (String,[Option]),
363 pgm_sysman :: String,
364 pgm_windres :: String,
367 extraPkgConfs :: [FilePath],
368 topDir :: FilePath, -- filled in by SysTools
369 systemPackageConfig :: FilePath, -- ditto
370 -- The -package-conf flags given on the command line, in the order
373 packageFlags :: [PackageFlag],
374 -- The -package and -hide-package flags from the command-line
377 -- NB. do not modify this field, it is calculated by
378 -- Packages.initPackages and Packages.updatePackages.
379 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
380 pkgState :: PackageState,
386 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
397 -- | will this target result in an object file on the disk?
398 isObjectTarget :: HscTarget -> Bool
399 isObjectTarget HscC = True
400 isObjectTarget HscAsm = True
401 isObjectTarget _ = False
403 -- | The 'GhcMode' tells us whether we're doing multi-module
404 -- compilation (controlled via the "GHC" API) or one-shot
405 -- (single-module) compilation. This makes a difference primarily to
406 -- the "Finder": in one-shot mode we look for interface files for
407 -- imported modules, but in multi-module mode we look for source files
408 -- in order to check whether they need to be recompiled.
410 = CompManager -- ^ --make, GHCi, etc.
411 | OneShot -- ^ ghc -c Foo.hs
412 | MkDepend -- ^ ghc -M, see Finder for why we need this
415 isOneShot :: GhcMode -> Bool
416 isOneShot OneShot = True
417 isOneShot _other = False
419 -- | What kind of linking to do.
420 data GhcLink -- What to do in the link step, if there is one
421 = NoLink -- Don't link at all
422 | LinkBinary -- Link object code into a binary
423 | LinkInMemory -- Use the in-memory dynamic linker
424 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
427 isNoLink :: GhcLink -> Bool
428 isNoLink NoLink = True
429 isNoLink other = False
432 = ExposePackage String
434 | IgnorePackage String
437 defaultHscTarget = defaultObjectTarget
439 -- | the 'HscTarget' value corresponding to the default way to create
440 -- object files on the current platform.
442 | cGhcWithNativeCodeGen == "YES" = HscAsm
445 initDynFlags dflags = do
446 -- someday these will be dynamic flags
447 ways <- readIORef v_Ways
448 build_tag <- readIORef v_Build_tag
449 rts_build_tag <- readIORef v_RTS_Build_tag
452 buildTag = build_tag,
453 rtsBuildTag = rts_build_tag
458 ghcMode = CompManager,
459 ghcLink = LinkBinary,
462 hscTarget = defaultHscTarget,
467 maxSimplIterations = 4,
471 cmdlineHcIncludes = [],
475 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
477 thisPackage = mainPackageId,
483 objectSuf = phaseInputExt StopLn,
484 hcSuf = phaseInputExt HCc,
487 outputFile = Nothing,
489 dumpPrefix = Nothing,
490 dumpPrefixForce = Nothing,
494 cmdlineFrameworks = [],
495 tmpDir = cDEFAULT_TMPDIR,
513 pkgDatabase = Nothing,
514 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
516 Opt_ReadUserPackageConf,
518 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
519 -- behaviour the default, to see if anyone notices
523 Opt_MonomorphismRestriction,
531 Opt_PrintBindResult ]
532 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
533 -- The default -O0 options
536 log_action = \severity srcSpan style msg ->
538 SevInfo -> hPutStrLn stderr (show (msg style))
539 SevFatal -> hPutStrLn stderr (show (msg style))
540 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
546 0 | print errors & warnings only
547 1 | minimal verbosity: print "compiling M ... done." for each module.
548 2 | equivalent to -dshow-passes
549 3 | equivalent to existing "ghc -v"
550 4 | "ghc -v -ddump-most"
551 5 | "ghc -v -ddump-all"
554 dopt :: DynFlag -> DynFlags -> Bool
555 dopt f dflags = f `elem` (flags dflags)
557 dopt_set :: DynFlags -> DynFlag -> DynFlags
558 dopt_set dfs f = dfs{ flags = f : flags dfs }
560 dopt_unset :: DynFlags -> DynFlag -> DynFlags
561 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
563 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
564 getOpts dflags opts = reverse (opts dflags)
565 -- We add to the options from the front, so we need to reverse the list
567 getVerbFlag :: DynFlags -> String
569 | verbosity dflags >= 3 = "-v"
572 setObjectDir f d = d{ objectDir = f}
573 setHiDir f d = d{ hiDir = f}
574 setStubDir f d = d{ stubDir = f}
576 setObjectSuf f d = d{ objectSuf = f}
577 setHiSuf f d = d{ hiSuf = f}
578 setHcSuf f d = d{ hcSuf = f}
580 setOutputFile f d = d{ outputFile = f}
581 setOutputHi f d = d{ outputHi = f}
583 setDumpPrefixForce f d = d { dumpPrefixForce = f}
585 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
586 -- Config.hs should really use Option.
587 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
589 setPgmL f d = d{ pgm_L = f}
590 setPgmF f d = d{ pgm_F = f}
591 setPgmc f d = d{ pgm_c = (f,[])}
592 setPgmm f d = d{ pgm_m = (f,[])}
593 setPgms f d = d{ pgm_s = (f,[])}
594 setPgma f d = d{ pgm_a = (f,[])}
595 setPgml f d = d{ pgm_l = (f,[])}
596 setPgmdll f d = d{ pgm_dll = (f,[])}
597 setPgmwindres f d = d{ pgm_windres = f}
599 addOptL f d = d{ opt_L = f : opt_L d}
600 addOptP f d = d{ opt_P = f : opt_P d}
601 addOptF f d = d{ opt_F = f : opt_F d}
602 addOptc f d = d{ opt_c = f : opt_c d}
603 addOptm f d = d{ opt_m = f : opt_m d}
604 addOpta f d = d{ opt_a = f : opt_a d}
605 addOptl f d = d{ opt_l = f : opt_l d}
606 addOptdep f d = d{ opt_dep = f : opt_dep d}
607 addOptwindres f d = d{ opt_windres = f : opt_windres d}
609 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
611 -- -----------------------------------------------------------------------------
612 -- Command-line options
614 -- When invoking external tools as part of the compilation pipeline, we
615 -- pass these a sequence of options on the command-line. Rather than
616 -- just using a list of Strings, we use a type that allows us to distinguish
617 -- between filepaths and 'other stuff'. [The reason being, of course, that
618 -- this type gives us a handle on transforming filenames, and filenames only,
619 -- to whatever format they're expected to be on a particular platform.]
622 = FileOption -- an entry that _contains_ filename(s) / filepaths.
623 String -- a non-filepath prefix that shouldn't be
624 -- transformed (e.g., "/out=")
625 String -- the filepath/filename portion
628 -----------------------------------------------------------------------------
629 -- Setting the optimisation level
631 updOptLevel :: Int -> DynFlags -> DynFlags
632 -- Set dynflags appropriate to the optimisation level
634 = dfs2{ optLevel = final_n }
636 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
637 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
638 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
640 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
641 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
643 optLevelFlags :: [([Int], DynFlag)]
645 = [ ([0], Opt_IgnoreInterfacePragmas)
646 , ([0], Opt_OmitInterfacePragmas)
648 , ([1,2], Opt_IgnoreAsserts)
649 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
651 , ([1,2], Opt_DoEtaReduction)
652 , ([1,2], Opt_CaseMerge)
653 , ([1,2], Opt_Strictness)
655 , ([1,2], Opt_FullLaziness)
657 , ([2], Opt_LiberateCase)
658 , ([2], Opt_SpecConstr)
660 , ([0,1,2], Opt_DoLambdaEtaExpansion)
661 -- This one is important for a tiresome reason:
662 -- we want to make sure that the bindings for data
663 -- constructors are eta-expanded. This is probably
664 -- a good thing anyway, but it seems fragile.
667 -- -----------------------------------------------------------------------------
668 -- Standard sets of warning options
671 = [ Opt_WarnDeprecations,
672 Opt_WarnOverlappingPatterns,
673 Opt_WarnMissingFields,
674 Opt_WarnMissingMethods,
675 Opt_WarnDuplicateExports
679 = standardWarnings ++
680 [ Opt_WarnUnusedBinds,
681 Opt_WarnUnusedMatches,
682 Opt_WarnUnusedImports,
683 Opt_WarnIncompletePatterns,
689 [ Opt_WarnTypeDefaults,
690 Opt_WarnNameShadowing,
696 -- minuswRemovesOpts should be every warning option
699 [Opt_WarnImplicitPrelude,
700 Opt_WarnIncompletePatternsRecUpd,
701 Opt_WarnSimplePatterns,
702 Opt_WarnMonomorphism,
706 -- -----------------------------------------------------------------------------
707 -- CoreToDo: abstraction of core-to-core passes to run.
709 data CoreToDo -- These are diff core-to-core passes,
710 -- which may be invoked in any order,
711 -- as many times as you like.
713 = CoreDoSimplify -- The core-to-core simplifier.
716 -- Each run of the simplifier can take a different
717 -- set of simplifier-specific flags.
719 | CoreDoFloatOutwards FloatOutSwitches
724 | CoreDoWorkerWrapper
727 | CoreDoOldStrictness
730 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
731 -- matching this string
732 | CoreDoVectorisation
733 | CoreDoNothing -- Useful when building up
734 | CoreDoPasses [CoreToDo] -- lists of these things
736 data SimplifierMode -- See comments in SimplMonad
740 data SimplifierSwitch
741 = MaxSimplifierIterations Int
744 data FloatOutSwitches
745 = FloatOutSw Bool -- True <=> float lambdas to top level
746 Bool -- True <=> float constants to top level,
747 -- even if they do not escape a lambda
750 -- The core-to-core pass ordering is derived from the DynFlags:
751 runWhen :: Bool -> CoreToDo -> CoreToDo
752 runWhen True do_this = do_this
753 runWhen False do_this = CoreDoNothing
755 getCoreToDo :: DynFlags -> [CoreToDo]
757 | Just todo <- coreToDo dflags = todo -- set explicitly by user
758 | otherwise = core_todo
760 opt_level = optLevel dflags
761 max_iter = maxSimplIterations dflags
762 strictness = dopt Opt_Strictness dflags
763 full_laziness = dopt Opt_FullLaziness dflags
764 cse = dopt Opt_CSE dflags
765 spec_constr = dopt Opt_SpecConstr dflags
766 liberate_case = dopt Opt_LiberateCase dflags
767 rule_check = ruleCheck dflags
768 vectorisation = dopt Opt_Vectorise dflags
771 if opt_level == 0 then
773 CoreDoSimplify (SimplPhase 0) [
774 MaxSimplifierIterations max_iter
777 else {- opt_level >= 1 -} [
779 -- initial simplify: mk specialiser happy: minimum effort please
780 CoreDoSimplify SimplGently [
782 -- Don't inline anything till full laziness has bitten
783 -- In particular, inlining wrappers inhibits floating
784 -- e.g. ...(case f x of ...)...
785 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
786 -- ==> ...(case x of I# x# -> case fw x# of ...)...
787 -- and now the redex (f x) isn't floatable any more
788 -- Similarly, don't apply any rules until after full
789 -- laziness. Notably, list fusion can prevent floating.
791 NoCaseOfCase, -- Don't do case-of-case transformations.
792 -- This makes full laziness work better
793 MaxSimplifierIterations max_iter
797 -- We run vectorisation here for now, but we might also try to run
799 runWhen vectorisation (CoreDoPasses [
801 CoreDoSimplify SimplGently
803 MaxSimplifierIterations max_iter]]),
805 -- Specialisation is best done before full laziness
806 -- so that overloaded functions have all their dictionary lambdas manifest
809 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
813 CoreDoSimplify (SimplPhase 2) [
814 -- Want to run with inline phase 2 after the specialiser to give
815 -- maximum chance for fusion to work before we inline build/augment
816 -- in phase 1. This made a difference in 'ansi' where an
817 -- overloaded function wasn't inlined till too late.
818 MaxSimplifierIterations max_iter
820 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
822 CoreDoSimplify (SimplPhase 1) [
823 -- Need inline-phase2 here so that build/augment get
824 -- inlined. I found that spectral/hartel/genfft lost some useful
825 -- strictness in the function sumcode' if augment is not inlined
826 -- before strictness analysis runs
827 MaxSimplifierIterations max_iter
829 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
831 CoreDoSimplify (SimplPhase 0) [
832 -- Phase 0: allow all Ids to be inlined now
833 -- This gets foldr inlined before strictness analysis
835 MaxSimplifierIterations 3
836 -- At least 3 iterations because otherwise we land up with
837 -- huge dead expressions because of an infelicity in the
839 -- let k = BIG in foldr k z xs
840 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
841 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
845 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
847 #ifdef OLD_STRICTNESS
850 runWhen strictness (CoreDoPasses [
854 CoreDoSimplify (SimplPhase 0) [
855 MaxSimplifierIterations max_iter
858 runWhen full_laziness
859 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
860 True)), -- Float constants
861 -- nofib/spectral/hartel/wang doubles in speed if you
862 -- do full laziness late in the day. It only happens
863 -- after fusion and other stuff, so the early pass doesn't
864 -- catch it. For the record, the redex is
865 -- f_el22 (f_el21 r_midblock)
869 -- We want CSE to follow the final full-laziness pass, because it may
870 -- succeed in commoning up things floated out by full laziness.
871 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
875 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
877 -- Case-liberation for -O2. This should be after
878 -- strictness analysis and the simplification which follows it.
879 runWhen liberate_case (CoreDoPasses [
881 CoreDoSimplify (SimplPhase 0) [
882 MaxSimplifierIterations max_iter
883 ] ]), -- Run the simplifier after LiberateCase to vastly
884 -- reduce the possiblility of shadowing
885 -- Reason: see Note [Shadowing] in SpecConstr.lhs
887 runWhen spec_constr CoreDoSpecConstr,
889 -- Final clean-up simplification:
890 CoreDoSimplify (SimplPhase 0) [
891 MaxSimplifierIterations max_iter
895 -- -----------------------------------------------------------------------------
896 -- StgToDo: abstraction of stg-to-stg passes to run.
899 = StgDoMassageForProfiling -- should be (next to) last
900 -- There's also setStgVarInfo, but its absolute "lastness"
901 -- is so critical that it is hardwired in (no flag).
904 getStgToDo :: DynFlags -> [StgToDo]
906 | Just todo <- stgToDo dflags = todo -- set explicitly by user
909 stg_stats = dopt Opt_StgStats dflags
911 todo1 = if stg_stats then [D_stg_stats] else []
913 todo2 | WayProf `elem` wayNames dflags
914 = StgDoMassageForProfiling : todo1
918 -- -----------------------------------------------------------------------------
922 allFlags = map ('-':) $
923 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
924 map ("fno-"++) flags ++
926 where ok (PrefixPred _ _) = False
928 flags = map fst fFlags
930 dynamic_flags :: [(String, OptKind DynP)]
932 ( "n" , NoArg (setDynFlag Opt_DryRun) )
933 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
934 , ( "F" , NoArg (setDynFlag Opt_Pp))
935 , ( "#include" , HasArg (addCmdlineHCInclude) )
936 , ( "v" , OptIntSuffix setVerbosity )
938 ------- Specific phases --------------------------------------------
939 , ( "pgmL" , HasArg (upd . setPgmL) )
940 , ( "pgmP" , HasArg (upd . setPgmP) )
941 , ( "pgmF" , HasArg (upd . setPgmF) )
942 , ( "pgmc" , HasArg (upd . setPgmc) )
943 , ( "pgmm" , HasArg (upd . setPgmm) )
944 , ( "pgms" , HasArg (upd . setPgms) )
945 , ( "pgma" , HasArg (upd . setPgma) )
946 , ( "pgml" , HasArg (upd . setPgml) )
947 , ( "pgmdll" , HasArg (upd . setPgmdll) )
948 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
950 , ( "optL" , HasArg (upd . addOptL) )
951 , ( "optP" , HasArg (upd . addOptP) )
952 , ( "optF" , HasArg (upd . addOptF) )
953 , ( "optc" , HasArg (upd . addOptc) )
954 , ( "optm" , HasArg (upd . addOptm) )
955 , ( "opta" , HasArg (upd . addOpta) )
956 , ( "optl" , HasArg (upd . addOptl) )
957 , ( "optdep" , HasArg (upd . addOptdep) )
958 , ( "optwindres" , HasArg (upd . addOptwindres) )
960 , ( "split-objs" , NoArg (if can_split
961 then setDynFlag Opt_SplitObjs
964 -------- Linking ----------------------------------------------------
965 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
966 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
967 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
969 ------- Libraries ---------------------------------------------------
970 , ( "L" , Prefix addLibraryPath )
971 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
973 ------- Frameworks --------------------------------------------------
974 -- -framework-path should really be -F ...
975 , ( "framework-path" , HasArg addFrameworkPath )
976 , ( "framework" , HasArg (upd . addCmdlineFramework) )
978 ------- Output Redirection ------------------------------------------
979 , ( "odir" , HasArg (upd . setObjectDir . Just))
980 , ( "o" , SepArg (upd . setOutputFile . Just))
981 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
982 , ( "osuf" , HasArg (upd . setObjectSuf))
983 , ( "hcsuf" , HasArg (upd . setHcSuf))
984 , ( "hisuf" , HasArg (upd . setHiSuf))
985 , ( "hidir" , HasArg (upd . setHiDir . Just))
986 , ( "tmpdir" , HasArg (upd . setTmpDir))
987 , ( "stubdir" , HasArg (upd . setStubDir . Just))
988 , ( "ddump-file-prefix", HasArg (upd . setDumpPrefixForce . Just))
990 ------- Keeping temporary files -------------------------------------
991 -- These can be singular (think ghc -c) or plural (think ghc --make)
992 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
993 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
994 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
995 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
996 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
997 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
998 -- This only makes sense as plural
999 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
1001 ------- Miscellaneous ----------------------------------------------
1002 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
1003 , ( "main-is" , SepArg setMainIs )
1004 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
1005 , ( "hpcdir" , SepArg setOptHpcDir )
1007 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
1008 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
1009 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
1011 ------- Packages ----------------------------------------------------
1012 , ( "package-conf" , HasArg extraPkgConf_ )
1013 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
1014 , ( "package-name" , HasArg (upd . setPackageName) )
1015 , ( "package" , HasArg exposePackage )
1016 , ( "hide-package" , HasArg hidePackage )
1017 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
1018 , ( "ignore-package" , HasArg ignorePackage )
1019 , ( "syslib" , HasArg exposePackage ) -- for compatibility
1021 ------ HsCpp opts ---------------------------------------------------
1022 , ( "D", AnySuffix (upd . addOptP) )
1023 , ( "U", AnySuffix (upd . addOptP) )
1025 ------- Include/Import Paths ----------------------------------------
1026 , ( "I" , Prefix addIncludePath)
1027 , ( "i" , OptPrefix addImportPath )
1029 ------ Debugging ----------------------------------------------------
1030 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1032 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1033 , ( "ddump-cmmz", setDumpFlag Opt_D_dump_cmmz)
1034 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1035 , ( "ddump-cvt-cmm", setDumpFlag Opt_D_dump_cvt_cmm)
1036 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1037 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1038 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1039 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1040 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1041 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1042 , ( "ddump-asm-regalloc-stages",
1043 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1044 , ( "ddump-asm-stats", setDumpFlag Opt_D_dump_asm_stats)
1045 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1046 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1047 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1048 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1049 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1050 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1051 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1052 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1053 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1054 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1055 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1056 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1057 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1058 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1059 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1060 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1061 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1062 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1063 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1064 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1065 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1066 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1067 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1068 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1069 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1070 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1071 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1072 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1073 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1074 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1075 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1076 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1077 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1078 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1079 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1080 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1081 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1082 , ( "ddump-to-file", setDumpFlag Opt_DumpToFile)
1083 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1084 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1085 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1086 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1087 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1088 setVerbosity (Just 2)) )
1089 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1091 ------ Machine dependant (-m<blah>) stuff ---------------------------
1093 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1094 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1095 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1097 ------ Warning opts -------------------------------------------------
1098 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1099 , ( "Werror", NoArg (setDynFlag Opt_WarnIsError) )
1100 , ( "Wwarn" , NoArg (unSetDynFlag Opt_WarnIsError) )
1101 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1102 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) -- DEPRECATED
1103 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1105 ------ Optimisation flags ------------------------------------------
1106 , ( "O" , NoArg (upd (setOptLevel 1)))
1107 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1108 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1109 -- If the number is missing, use 1
1111 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1112 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1114 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1115 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1116 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1118 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1119 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1121 ------ Compiler flags -----------------------------------------------
1123 , ( "fasm", NoArg (setObjTarget HscAsm) )
1124 , ( "fvia-c", NoArg (setObjTarget HscC) )
1125 , ( "fvia-C", NoArg (setObjTarget HscC) )
1127 , ( "fno-code", NoArg (setTarget HscNothing))
1128 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1129 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1131 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1132 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1134 -- the rest of the -f* and -fno-* flags
1135 , ( "f", PrefixPred (isFlag fFlags)
1136 (\f -> setDynFlag (getFlag fFlags f)) )
1137 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1138 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1140 -- the -X* and -XNo* flags
1141 , ( "X", PrefixPred (isFlag xFlags)
1142 (\f -> setDynFlag (getFlag xFlags f)) )
1143 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1144 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1147 -- these -f<blah> flags can all be reversed with -fno-<blah>
1150 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1151 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1152 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1153 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1154 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1155 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1156 ( "warn-missing-fields", Opt_WarnMissingFields ),
1157 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1158 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1159 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1160 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1161 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1162 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1163 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1164 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1165 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1166 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1167 ( "warn-deprecations", Opt_WarnDeprecations ),
1168 ( "warn-orphans", Opt_WarnOrphans ),
1169 ( "warn-tabs", Opt_WarnTabs ),
1170 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1171 ( "strictness", Opt_Strictness ),
1172 ( "full-laziness", Opt_FullLaziness ),
1173 ( "liberate-case", Opt_LiberateCase ),
1174 ( "spec-constr", Opt_SpecConstr ),
1176 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1177 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1178 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1179 ( "ignore-asserts", Opt_IgnoreAsserts ),
1180 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1181 ( "do-eta-reduction", Opt_DoEtaReduction ),
1182 ( "case-merge", Opt_CaseMerge ),
1183 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1184 ( "dicts-cheap", Opt_DictsCheap ),
1185 ( "excess-precision", Opt_ExcessPrecision ),
1186 ( "asm-mangling", Opt_DoAsmMangling ),
1187 ( "print-bind-result", Opt_PrintBindResult ),
1188 ( "force-recomp", Opt_ForceRecomp ),
1189 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1190 ( "rewrite-rules", Opt_RewriteRules ),
1191 ( "break-on-exception", Opt_BreakOnException ),
1192 ( "run-cps", Opt_RunCPSZ ),
1193 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack),
1194 ( "vectorise", Opt_Vectorise ),
1195 ( "regs-graph", Opt_RegsGraph),
1196 -- Deprecated in favour of -XTemplateHaskell:
1197 ( "th", Opt_TemplateHaskell ),
1198 -- Deprecated in favour of -XForeignFunctionInterface:
1199 ( "fi", Opt_ForeignFunctionInterface ),
1200 -- Deprecated in favour of -XForeignFunctionInterface:
1201 ( "ffi", Opt_ForeignFunctionInterface ),
1202 -- Deprecated in favour of -XArrows:
1203 ( "arrows", Opt_Arrows ),
1204 -- Deprecated in favour of -XGenerics:
1205 ( "generics", Opt_Generics ),
1206 -- Deprecated in favour of -XImplicitPrelude:
1207 ( "implicit-prelude", Opt_ImplicitPrelude ),
1208 -- Deprecated in favour of -XBangPatterns:
1209 ( "bang-patterns", Opt_BangPatterns ),
1210 -- Deprecated in favour of -XMonomorphismRestriction:
1211 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1212 -- Deprecated in favour of -XMonoPatBinds:
1213 ( "mono-pat-binds", Opt_MonoPatBinds ),
1214 -- Deprecated in favour of -XExtendedDefaultRules:
1215 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1216 -- Deprecated in favour of -XImplicitParams:
1217 ( "implicit-params", Opt_ImplicitParams ),
1218 -- Deprecated in favour of -XScopedTypeVariables:
1219 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1220 -- Deprecated in favour of -XPArr:
1221 ( "parr", Opt_PArr ),
1222 -- Deprecated in favour of -XOverlappingInstances:
1223 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1224 -- Deprecated in favour of -XUndecidableInstances:
1225 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1226 -- Deprecated in favour of -XIncoherentInstances:
1227 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1228 ( "gen-manifest", Opt_GenManifest ),
1229 ( "embed-manifest", Opt_EmbedManifest )
1232 supportedLanguages :: [String]
1233 supportedLanguages = map fst xFlags
1235 -- These -X<blah> flags can all be reversed with -XNo<blah>
1236 xFlags :: [(String, DynFlag)]
1239 ( "PatternGuards", Opt_PatternGuards ),
1240 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1241 ( "MagicHash", Opt_MagicHash ),
1242 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1243 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1244 ( "KindSignatures", Opt_KindSignatures ),
1245 ( "PatternSignatures", Opt_PatternSignatures ),
1246 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1247 ( "ParallelListComp", Opt_ParallelListComp ),
1248 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1249 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1250 ( "PartiallyAppliedClosedTypeSynonyms",
1251 Opt_PartiallyAppliedClosedTypeSynonyms ),
1252 ( "Rank2Types", Opt_Rank2Types ),
1253 ( "RankNTypes", Opt_RankNTypes ),
1254 ( "TypeOperators", Opt_TypeOperators ),
1255 ( "RecursiveDo", Opt_RecursiveDo ),
1256 ( "Arrows", Opt_Arrows ),
1257 ( "PArr", Opt_PArr ),
1258 ( "TemplateHaskell", Opt_TemplateHaskell ),
1259 ( "Generics", Opt_Generics ),
1261 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1262 ( "RecordWildCards", Opt_RecordWildCards ),
1263 ( "RecordPuns", Opt_RecordPuns ),
1264 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1265 ( "OverloadedStrings", Opt_OverloadedStrings ),
1266 ( "GADTs", Opt_GADTs ),
1267 ( "TypeFamilies", Opt_TypeFamilies ),
1268 ( "BangPatterns", Opt_BangPatterns ),
1270 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1271 -- On by default (which is not strictly H98):
1272 ( "MonoPatBinds", Opt_MonoPatBinds ),
1273 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1274 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1275 ( "ImplicitParams", Opt_ImplicitParams ),
1276 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1277 ( "UnboxedTuples", Opt_UnboxedTuples ),
1278 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1279 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1280 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1281 ( "FlexibleContexts", Opt_FlexibleContexts ),
1282 ( "FlexibleInstances", Opt_FlexibleInstances ),
1283 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1284 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1285 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1286 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1287 ( "OverlappingInstances", Opt_OverlappingInstances ),
1288 ( "UndecidableInstances", Opt_UndecidableInstances ),
1289 ( "IncoherentInstances", Opt_IncoherentInstances )
1292 impliedFlags :: [(DynFlag, [DynFlag])]
1294 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1297 glasgowExtsFlags = [
1298 Opt_PrintExplicitForalls
1299 , Opt_ForeignFunctionInterface
1300 , Opt_UnliftedFFITypes
1302 , Opt_ImplicitParams
1303 , Opt_ScopedTypeVariables
1305 , Opt_TypeSynonymInstances
1306 , Opt_StandaloneDeriving
1307 , Opt_DeriveDataTypeable
1308 , Opt_FlexibleContexts
1309 , Opt_FlexibleInstances
1310 , Opt_ConstrainedClassMethods
1311 , Opt_MultiParamTypeClasses
1312 , Opt_FunctionalDependencies
1314 , Opt_PolymorphicComponents
1315 , Opt_ExistentialQuantification
1318 , Opt_PartiallyAppliedClosedTypeSynonyms
1322 , Opt_ParallelListComp
1323 , Opt_EmptyDataDecls
1324 , Opt_KindSignatures
1325 , Opt_PatternSignatures
1326 , Opt_GeneralizedNewtypeDeriving
1327 , Opt_TypeFamilies ]
1330 isFlag :: [(String,a)] -> String -> Bool
1331 isFlag flags f = any (\(ff,_) -> ff == f) flags
1333 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1334 isPrefFlag pref flags no_f
1335 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1339 getFlag :: [(String,a)] -> String -> a
1340 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1342 [] -> panic ("get_flag " ++ f)
1344 getPrefFlag :: String -> [(String,a)] -> String -> a
1345 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1346 -- We should only be passed flags which match the prefix
1348 -- -----------------------------------------------------------------------------
1349 -- Parsing the dynamic flags.
1351 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1352 parseDynamicFlags dflags args = do
1353 let ((leftover,errs),dflags')
1354 = runCmdLine (processArgs dynamic_flags args) dflags
1355 when (not (null errs)) $ do
1356 throwDyn (UsageError (unlines errs))
1357 return (dflags', leftover)
1360 type DynP = CmdLineP DynFlags
1362 upd :: (DynFlags -> DynFlags) -> DynP ()
1364 dfs <- getCmdLineState
1365 putCmdLineState $! (f dfs)
1367 --------------------------
1368 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1369 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1371 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1372 -- When you set f, set the ones it implies
1373 -- When you un-set f, however, we don't un-set the things it implies
1374 -- (except for -fno-glasgow-exts, which is treated specially)
1376 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1378 --------------------------
1379 setDumpFlag :: DynFlag -> OptKind DynP
1380 setDumpFlag dump_flag
1381 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1382 -- Whenver we -ddump, switch off the recompilation checker,
1383 -- else you don't see the dump!
1385 setVerbosity :: Maybe Int -> DynP ()
1386 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1388 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1390 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1393 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1395 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1397 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1400 | Nothing <- unpackPackageId pid
1401 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1403 = \s -> s{ thisPackage = pid }
1405 pid = stringToPackageId p
1407 -- If we're linking a binary, then only targets that produce object
1408 -- code are allowed (requests for other target types are ignored).
1409 setTarget l = upd set
1412 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1415 -- Changes the target only if we're compiling object code. This is
1416 -- used by -fasm and -fvia-C, which switch from one to the other, but
1417 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1418 -- can be safely used in an OPTIONS_GHC pragma.
1419 setObjTarget l = upd set
1422 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1425 setOptLevel :: Int -> DynFlags -> DynFlags
1426 setOptLevel n dflags
1427 | hscTarget dflags == HscInterpreted && n > 0
1429 -- not in IO any more, oh well:
1430 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1432 = updOptLevel n dflags
1435 setMainIs :: String -> DynP ()
1437 | not (null main_fn) -- The arg looked like "Foo.baz"
1438 = upd $ \d -> d{ mainFunIs = Just main_fn,
1439 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1441 | isUpper (head main_mod) -- The arg looked like "Foo"
1442 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1444 | otherwise -- The arg looked like "baz"
1445 = upd $ \d -> d{ mainFunIs = Just main_mod }
1447 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1449 -----------------------------------------------------------------------------
1450 -- Paths & Libraries
1452 -- -i on its own deletes the import paths
1453 addImportPath "" = upd (\s -> s{importPaths = []})
1454 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1458 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1461 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1463 addFrameworkPath p =
1464 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1466 split_marker = ':' -- not configurable (ToDo)
1468 splitPathList :: String -> [String]
1469 splitPathList s = filter notNull (splitUp s)
1470 -- empty paths are ignored: there might be a trailing
1471 -- ':' in the initial list, for example. Empty paths can
1472 -- cause confusion when they are translated into -I options
1473 -- for passing to gcc.
1475 #ifndef mingw32_TARGET_OS
1476 splitUp xs = split split_marker xs
1478 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1480 -- That is, if "foo:bar:baz" is used, this interpreted as
1481 -- consisting of three entries, 'foo', 'bar', 'baz'.
1482 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1483 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1485 -- Notice that no attempt is made to fully replace the 'standard'
1486 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1487 -- that this will cause too much breakage for users & ':' will
1488 -- work fine even with DOS paths, if you're not insisting on being silly.
1491 splitUp (x:':':div:xs) | div `elem` dir_markers
1492 = ((x:':':div:p): splitUp rs)
1494 (p,rs) = findNextPath xs
1495 -- we used to check for existence of the path here, but that
1496 -- required the IO monad to be threaded through the command-line
1497 -- parser which is quite inconvenient. The
1498 splitUp xs = cons p (splitUp rs)
1500 (p,rs) = findNextPath xs
1505 -- will be called either when we've consumed nought or the
1506 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1507 -- finding the next split marker.
1509 case break (`elem` split_markers) xs of
1510 (p, d:ds) -> (p, ds)
1513 split_markers :: [Char]
1514 split_markers = [':', ';']
1516 dir_markers :: [Char]
1517 dir_markers = ['/', '\\']
1520 -- -----------------------------------------------------------------------------
1521 -- tmpDir, where we store temporary files.
1523 setTmpDir :: FilePath -> DynFlags -> DynFlags
1524 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1526 #if !defined(mingw32_HOST_OS)
1527 canonicalise p = normalisePath p
1529 -- Canonicalisation of temp path under win32 is a bit more
1530 -- involved: (a) strip trailing slash,
1531 -- (b) normalise slashes
1532 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1534 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1536 -- if we're operating under cygwin, and TMP/TEMP is of
1537 -- the form "/cygdrive/drive/path", translate this to
1538 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1539 -- understand /cygdrive paths.)
1541 | "/cygdrive/" `isPrefixOf` path =
1542 case drop (length "/cygdrive/") path of
1543 drive:xs@('/':_) -> drive:':':xs
1547 -- strip the trailing backslash (awful, but we only do this once).
1548 removeTrailingSlash path =
1555 -----------------------------------------------------------------------------
1558 setOptHpcDir :: String -> DynP ()
1559 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1561 -----------------------------------------------------------------------------
1562 -- Via-C compilation stuff
1564 -- There are some options that we need to pass to gcc when compiling
1565 -- Haskell code via C, but are only supported by recent versions of
1566 -- gcc. The configure script decides which of these options we need,
1567 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1568 -- read before each via-C compilation. The advantage of having these
1569 -- in a separate file is that the file can be created at install-time
1570 -- depending on the available gcc version, and even re-generated later
1571 -- if gcc is upgraded.
1573 -- The options below are not dependent on the version of gcc, only the
1576 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1577 [String]) -- for registerised HC compilations
1578 machdepCCOpts dflags
1579 #if alpha_TARGET_ARCH
1581 #ifdef HAVE_THREADED_RTS_SUPPORT
1585 -- For now, to suppress the gcc warning "call-clobbered
1586 -- register used for global register variable", we simply
1587 -- disable all warnings altogether using the -w flag. Oh well.
1589 #elif hppa_TARGET_ARCH
1590 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1591 -- (very nice, but too bad the HP /usr/include files don't agree.)
1592 = ( ["-D_HPUX_SOURCE"], [] )
1594 #elif m68k_TARGET_ARCH
1595 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1596 -- popping of args to routines to be explicit; if we let things
1597 -- be deferred 'til after an STGJUMP, imminent death is certain!
1599 -- -fomit-frame-pointer : *don't*
1600 -- It's better to have a6 completely tied up being a frame pointer
1601 -- rather than let GCC pick random things to do with it.
1602 -- (If we want to steal a6, then we would try to do things
1603 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1604 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1606 #elif i386_TARGET_ARCH
1607 -- -fno-defer-pop : basically the same game as for m68k
1609 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1610 -- the fp (%ebp) for our register maps.
1611 = let n_regs = stolen_x86_regs dflags
1614 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1615 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1618 "-fomit-frame-pointer",
1619 -- we want -fno-builtin, because when gcc inlines
1620 -- built-in functions like memcpy() it tends to
1621 -- run out of registers, requiring -monly-n-regs
1623 "-DSTOLEN_X86_REGS="++show n_regs ]
1626 #elif ia64_TARGET_ARCH
1627 = ( [], ["-fomit-frame-pointer", "-G0"] )
1629 #elif x86_64_TARGET_ARCH
1630 = ( [], ["-fomit-frame-pointer",
1631 "-fno-asynchronous-unwind-tables",
1632 -- the unwind tables are unnecessary for HC code,
1633 -- and get in the way of -split-objs. Another option
1634 -- would be to throw them away in the mangler, but this
1637 -- calling builtins like strlen() using the FFI can
1638 -- cause gcc to run out of regs, so use the external
1642 #elif sparc_TARGET_ARCH
1644 -- For now, to suppress the gcc warning "call-clobbered
1645 -- register used for global register variable", we simply
1646 -- disable all warnings altogether using the -w flag. Oh well.
1648 #elif powerpc_apple_darwin_TARGET
1650 -- Disable Apple's precompiling preprocessor. It's a great thing
1651 -- for "normal" programs, but it doesn't support register variable
1653 = ( [], ["-no-cpp-precomp"] )
1658 picCCOpts :: DynFlags -> [String]
1660 #if darwin_TARGET_OS
1661 -- Apple prefers to do things the other way round.
1662 -- PIC is on by default.
1663 -- -mdynamic-no-pic:
1664 -- Turn off PIC code generation.
1666 -- Don't generate "common" symbols - these are unwanted
1667 -- in dynamic libraries.
1670 = ["-fno-common", "-D__PIC__"]
1672 = ["-mdynamic-no-pic"]
1673 #elif mingw32_TARGET_OS
1674 -- no -fPIC for Windows
1681 = ["-fPIC", "-D__PIC__"]
1686 -- -----------------------------------------------------------------------------
1690 can_split = cSplitObjs == "YES"
1692 -- -----------------------------------------------------------------------------
1695 compilerInfo :: [(String, String)]
1696 compilerInfo = [("Project name", cProjectName),
1697 ("Project version", cProjectVersion),
1698 ("Booter version", cBooterVersion),
1700 ("Interface file version", cHscIfaceFileVersion),
1701 ("Have interpreter", cGhcWithInterpreter),
1702 ("Object splitting", cSplitObjs),
1703 ("Have native code generator", cGhcWithNativeCodeGen),
1704 ("Support SMP", cGhcWithSMP),
1705 ("Unregisterised", cGhcUnregisterised),
1706 ("Tables next to code", cGhcEnableTablesNextToCode),
1707 ("Win32 DLLs", cEnableWin32DLLs),
1708 ("RTS ways", cGhcRTSWays),
1709 ("Leading underscore", cLeadingUnderscore)]