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 -----------------------------------------------------------------------------
20 HscTarget(..), isObjectTarget, defaultObjectTarget,
21 GhcMode(..), isOneShot,
22 GhcLink(..), isNoLink,
26 -- Configuration of the core-to-core and stg-to-stg phases
30 SimplifierMode(..), FloatOutSwitches(..),
31 getCoreToDo, getStgToDo,
33 -- Manipulating DynFlags
34 defaultDynFlags, -- DynFlags
35 initDynFlags, -- DynFlags -> IO DynFlags
37 dopt, -- DynFlag -> DynFlags -> Bool
38 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
39 getOpts, -- (DynFlags -> [a]) -> IO [a]
50 machdepCCOpts, picCCOpts,
55 #include "HsVersions.h"
57 import Module ( Module, mkModuleName, mkModule )
59 import PrelNames ( mAIN )
60 #ifdef i386_TARGET_ARCH
61 import StaticFlags ( opt_Static )
63 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
65 import {-# SOURCE #-} Packages (PackageState)
66 import DriverPhases ( Phase(..), phaseInputExt )
69 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
70 import Panic ( panic, GhcException(..) )
71 import UniqFM ( UniqFM )
73 import Maybes ( orElse, fromJust )
74 import SrcLoc ( SrcSpan )
76 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
78 import Data.IORef ( readIORef )
79 import Control.Exception ( throwDyn )
80 import Control.Monad ( when )
81 #ifdef mingw32_TARGET_OS
82 import Data.List ( isPrefixOf )
87 import Data.Char ( isUpper, toLower )
88 import System.IO ( hPutStrLn, stderr )
90 -- -----------------------------------------------------------------------------
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_drop_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
126 | Opt_D_dump_worker_wrapper
127 | Opt_D_dump_rn_trace
128 | Opt_D_dump_rn_stats
130 | Opt_D_dump_simpl_stats
131 | Opt_D_dump_tc_trace
132 | Opt_D_dump_if_trace
138 | Opt_D_verbose_core2core
139 | Opt_D_verbose_stg2stg
141 | Opt_D_dump_hi_diffs
142 | Opt_D_dump_minimal_imports
143 | Opt_D_dump_mod_cycles
144 | Opt_D_faststring_stats
149 | Opt_WarnIsError -- -Werror; makes warnings fatal
150 | Opt_WarnDuplicateExports
152 | Opt_WarnImplicitPrelude
153 | Opt_WarnIncompletePatterns
154 | Opt_WarnIncompletePatternsRecUpd
155 | Opt_WarnMissingFields
156 | Opt_WarnMissingMethods
157 | Opt_WarnMissingSigs
158 | Opt_WarnNameShadowing
159 | Opt_WarnOverlappingPatterns
160 | Opt_WarnSimplePatterns
161 | Opt_WarnTypeDefaults
162 | Opt_WarnMonomorphism
163 | Opt_WarnUnusedBinds
164 | Opt_WarnUnusedImports
165 | Opt_WarnUnusedMatches
166 | Opt_WarnDeprecations
167 | Opt_WarnDodgyImports
172 | Opt_OverlappingInstances
173 | Opt_UndecidableInstances
174 | Opt_IncoherentInstances
175 | Opt_MonomorphismRestriction
177 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
178 | Opt_ForeignFunctionInterface
179 | Opt_UnliftedFFITypes
180 | Opt_PArr -- Syntactic support for parallel arrays
181 | Opt_Arrows -- Arrow-notation syntax
182 | Opt_TemplateHaskell
185 | Opt_ImplicitPrelude
186 | Opt_ScopedTypeVariables
190 | Opt_OverloadedStrings
191 | Opt_DisambiguateRecordFields
192 | Opt_RecordWildCards
196 | Opt_StandaloneDeriving
197 | Opt_DeriveDataTypeable
198 | Opt_TypeSynonymInstances
199 | Opt_FlexibleContexts
200 | Opt_FlexibleInstances
201 | Opt_ConstrainedClassMethods
202 | Opt_MultiParamTypeClasses
203 | Opt_FunctionalDependencies
205 | Opt_PolymorphicComponents
206 | Opt_ExistentialQuantification
210 | Opt_PatternSignatures
211 | Opt_ParallelListComp
212 | Opt_GeneralizedNewtypeDeriving
215 | Opt_PartiallyAppliedClosedTypeSynonyms
220 | Opt_PrintExplicitForalls
228 | Opt_IgnoreInterfacePragmas
229 | Opt_OmitInterfacePragmas
230 | Opt_DoLambdaEtaExpansion
232 | Opt_IgnoreBreakpoints
235 | Opt_UnboxStrictFields
247 | Opt_ExcessPrecision
248 | Opt_ReadUserPackageConf
252 | Opt_HideAllPackages
253 | Opt_PrintBindResult
256 | Opt_BreakOnException
269 data DynFlags = DynFlags {
272 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
273 stgToDo :: Maybe [StgToDo], -- similarly
274 hscTarget :: HscTarget,
275 hscOutName :: String, -- name of the output file
276 extCoreName :: String, -- name of the .core output file
277 verbosity :: Int, -- verbosity level
278 optLevel :: Int, -- optimisation level
279 maxSimplIterations :: Int, -- max simplifier iterations
280 ruleCheck :: Maybe String,
282 specThreshold :: Int, -- Threshold for function specialisation
284 stolen_x86_regs :: Int,
285 cmdlineHcIncludes :: [String], -- -#includes
286 importPaths :: [FilePath],
288 mainFunIs :: Maybe String,
289 ctxtStkDepth :: Int, -- Typechecker context stack depth
291 thisPackage :: PackageId,
294 wayNames :: [WayName], -- way flags from the cmd line
295 buildTag :: String, -- the global "way" (eg. "p" for prof)
296 rtsBuildTag :: String, -- the RTS "way"
299 objectDir :: Maybe String,
300 hiDir :: Maybe String,
301 stubDir :: Maybe String,
307 outputFile :: Maybe String,
308 outputHi :: Maybe String,
310 includePaths :: [String],
311 libraryPaths :: [String],
312 frameworkPaths :: [String], -- used on darwin only
313 cmdlineFrameworks :: [String], -- ditto
314 tmpDir :: String, -- no trailing '/'
316 ghcUsagePath :: FilePath, -- Filled in by SysTools
317 ghciUsagePath :: FilePath, -- ditto
319 hpcDir :: String, -- ^ path to store the .mix files
321 -- options for particular phases
330 opt_windres :: [String],
332 -- commands for particular phases
334 pgm_P :: (String,[Option]),
336 pgm_c :: (String,[Option]),
337 pgm_m :: (String,[Option]),
338 pgm_s :: (String,[Option]),
339 pgm_a :: (String,[Option]),
340 pgm_l :: (String,[Option]),
341 pgm_dll :: (String,[Option]),
343 pgm_sysman :: String,
344 pgm_windres :: String,
347 extraPkgConfs :: [FilePath],
348 topDir :: FilePath, -- filled in by SysTools
349 systemPackageConfig :: FilePath, -- ditto
350 -- The -package-conf flags given on the command line, in the order
353 packageFlags :: [PackageFlag],
354 -- The -package and -hide-package flags from the command-line
357 -- NB. do not modify this field, it is calculated by
358 -- Packages.initPackages and Packages.updatePackages.
359 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
360 pkgState :: PackageState,
366 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
377 -- | will this target result in an object file on the disk?
378 isObjectTarget :: HscTarget -> Bool
379 isObjectTarget HscC = True
380 isObjectTarget HscAsm = True
381 isObjectTarget _ = False
383 -- | The 'GhcMode' tells us whether we're doing multi-module
384 -- compilation (controlled via the "GHC" API) or one-shot
385 -- (single-module) compilation. This makes a difference primarily to
386 -- the "Finder": in one-shot mode we look for interface files for
387 -- imported modules, but in multi-module mode we look for source files
388 -- in order to check whether they need to be recompiled.
390 = CompManager -- ^ --make, GHCi, etc.
391 | OneShot -- ^ ghc -c Foo.hs
392 | MkDepend -- ^ ghc -M, see Finder for why we need this
395 isOneShot :: GhcMode -> Bool
396 isOneShot OneShot = True
397 isOneShot _other = False
399 -- | What kind of linking to do.
400 data GhcLink -- What to do in the link step, if there is one
401 = NoLink -- Don't link at all
402 | LinkBinary -- Link object code into a binary
403 | LinkInMemory -- Use the in-memory dynamic linker
404 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
407 isNoLink :: GhcLink -> Bool
408 isNoLink NoLink = True
409 isNoLink other = False
412 = ExposePackage String
414 | IgnorePackage String
417 defaultHscTarget = defaultObjectTarget
419 -- | the 'HscTarget' value corresponding to the default way to create
420 -- object files on the current platform.
422 | cGhcWithNativeCodeGen == "YES" = HscAsm
425 initDynFlags dflags = do
426 -- someday these will be dynamic flags
427 ways <- readIORef v_Ways
428 build_tag <- readIORef v_Build_tag
429 rts_build_tag <- readIORef v_RTS_Build_tag
432 buildTag = build_tag,
433 rtsBuildTag = rts_build_tag
438 ghcMode = CompManager,
439 ghcLink = LinkBinary,
442 hscTarget = defaultHscTarget,
447 maxSimplIterations = 4,
451 cmdlineHcIncludes = [],
455 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
457 thisPackage = mainPackageId,
463 objectSuf = phaseInputExt StopLn,
464 hcSuf = phaseInputExt HCc,
467 outputFile = Nothing,
472 cmdlineFrameworks = [],
473 tmpDir = cDEFAULT_TMPDIR,
491 pkgDatabase = Nothing,
492 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
494 Opt_ReadUserPackageConf,
496 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
497 -- behaviour the default, to see if anyone notices
501 Opt_MonomorphismRestriction,
509 Opt_PrintBindResult ]
510 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
511 -- The default -O0 options
514 log_action = \severity srcSpan style msg ->
516 SevInfo -> hPutStrLn stderr (show (msg style))
517 SevFatal -> hPutStrLn stderr (show (msg style))
518 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
524 0 | print errors & warnings only
525 1 | minimal verbosity: print "compiling M ... done." for each module.
526 2 | equivalent to -dshow-passes
527 3 | equivalent to existing "ghc -v"
528 4 | "ghc -v -ddump-most"
529 5 | "ghc -v -ddump-all"
532 dopt :: DynFlag -> DynFlags -> Bool
533 dopt f dflags = f `elem` (flags dflags)
535 dopt_set :: DynFlags -> DynFlag -> DynFlags
536 dopt_set dfs f = dfs{ flags = f : flags dfs }
538 dopt_unset :: DynFlags -> DynFlag -> DynFlags
539 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
541 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
542 getOpts dflags opts = reverse (opts dflags)
543 -- We add to the options from the front, so we need to reverse the list
545 getVerbFlag :: DynFlags -> String
547 | verbosity dflags >= 3 = "-v"
550 setObjectDir f d = d{ objectDir = f}
551 setHiDir f d = d{ hiDir = f}
552 setStubDir f d = d{ stubDir = f}
554 setObjectSuf f d = d{ objectSuf = f}
555 setHiSuf f d = d{ hiSuf = f}
556 setHcSuf f d = d{ hcSuf = f}
558 setOutputFile f d = d{ outputFile = f}
559 setOutputHi f d = d{ outputHi = f}
561 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
562 -- Config.hs should really use Option.
563 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
565 setPgmL f d = d{ pgm_L = f}
566 setPgmF f d = d{ pgm_F = f}
567 setPgmc f d = d{ pgm_c = (f,[])}
568 setPgmm f d = d{ pgm_m = (f,[])}
569 setPgms f d = d{ pgm_s = (f,[])}
570 setPgma f d = d{ pgm_a = (f,[])}
571 setPgml f d = d{ pgm_l = (f,[])}
572 setPgmdll f d = d{ pgm_dll = (f,[])}
573 setPgmwindres f d = d{ pgm_windres = f}
575 addOptL f d = d{ opt_L = f : opt_L d}
576 addOptP f d = d{ opt_P = f : opt_P d}
577 addOptF f d = d{ opt_F = f : opt_F d}
578 addOptc f d = d{ opt_c = f : opt_c d}
579 addOptm f d = d{ opt_m = f : opt_m d}
580 addOpta f d = d{ opt_a = f : opt_a d}
581 addOptl f d = d{ opt_l = f : opt_l d}
582 addOptdep f d = d{ opt_dep = f : opt_dep d}
583 addOptwindres f d = d{ opt_windres = f : opt_windres d}
585 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
587 -- -----------------------------------------------------------------------------
588 -- Command-line options
590 -- When invoking external tools as part of the compilation pipeline, we
591 -- pass these a sequence of options on the command-line. Rather than
592 -- just using a list of Strings, we use a type that allows us to distinguish
593 -- between filepaths and 'other stuff'. [The reason being, of course, that
594 -- this type gives us a handle on transforming filenames, and filenames only,
595 -- to whatever format they're expected to be on a particular platform.]
598 = FileOption -- an entry that _contains_ filename(s) / filepaths.
599 String -- a non-filepath prefix that shouldn't be
600 -- transformed (e.g., "/out=")
601 String -- the filepath/filename portion
604 -----------------------------------------------------------------------------
605 -- Setting the optimisation level
607 updOptLevel :: Int -> DynFlags -> DynFlags
608 -- Set dynflags appropriate to the optimisation level
610 = dfs2{ optLevel = final_n }
612 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
613 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
614 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
616 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
617 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
619 optLevelFlags :: [([Int], DynFlag)]
621 = [ ([0], Opt_IgnoreInterfacePragmas)
622 , ([0], Opt_OmitInterfacePragmas)
624 , ([1,2], Opt_IgnoreAsserts)
625 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
627 , ([1,2], Opt_DoEtaReduction)
628 , ([1,2], Opt_CaseMerge)
629 , ([1,2], Opt_Strictness)
631 , ([1,2], Opt_FullLaziness)
633 , ([2], Opt_LiberateCase)
634 , ([2], Opt_SpecConstr)
636 , ([0,1,2], Opt_DoLambdaEtaExpansion)
637 -- This one is important for a tiresome reason:
638 -- we want to make sure that the bindings for data
639 -- constructors are eta-expanded. This is probably
640 -- a good thing anyway, but it seems fragile.
643 -- -----------------------------------------------------------------------------
644 -- Standard sets of warning options
647 = [ Opt_WarnDeprecations,
648 Opt_WarnOverlappingPatterns,
649 Opt_WarnMissingFields,
650 Opt_WarnMissingMethods,
651 Opt_WarnDuplicateExports
655 = standardWarnings ++
656 [ Opt_WarnUnusedBinds,
657 Opt_WarnUnusedMatches,
658 Opt_WarnUnusedImports,
659 Opt_WarnIncompletePatterns,
665 [ Opt_WarnTypeDefaults,
666 Opt_WarnNameShadowing,
672 -- minuswRemovesOpts should be every warning option
675 [Opt_WarnImplicitPrelude,
676 Opt_WarnIncompletePatternsRecUpd,
677 Opt_WarnSimplePatterns,
678 Opt_WarnMonomorphism,
682 -- -----------------------------------------------------------------------------
683 -- CoreToDo: abstraction of core-to-core passes to run.
685 data CoreToDo -- These are diff core-to-core passes,
686 -- which may be invoked in any order,
687 -- as many times as you like.
689 = CoreDoSimplify -- The core-to-core simplifier.
692 -- Each run of the simplifier can take a different
693 -- set of simplifier-specific flags.
695 | CoreDoFloatOutwards FloatOutSwitches
700 | CoreDoWorkerWrapper
703 | CoreDoOldStrictness
706 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
707 -- matching this string
708 | CoreDoVectorisation
709 | CoreDoNothing -- Useful when building up
710 | CoreDoPasses [CoreToDo] -- lists of these things
712 data SimplifierMode -- See comments in SimplMonad
716 data SimplifierSwitch
717 = MaxSimplifierIterations Int
720 data FloatOutSwitches
721 = FloatOutSw Bool -- True <=> float lambdas to top level
722 Bool -- True <=> float constants to top level,
723 -- even if they do not escape a lambda
726 -- The core-to-core pass ordering is derived from the DynFlags:
727 runWhen :: Bool -> CoreToDo -> CoreToDo
728 runWhen True do_this = do_this
729 runWhen False do_this = CoreDoNothing
731 getCoreToDo :: DynFlags -> [CoreToDo]
733 | Just todo <- coreToDo dflags = todo -- set explicitly by user
734 | otherwise = core_todo
736 opt_level = optLevel dflags
737 max_iter = maxSimplIterations dflags
738 strictness = dopt Opt_Strictness dflags
739 full_laziness = dopt Opt_FullLaziness dflags
740 cse = dopt Opt_CSE dflags
741 spec_constr = dopt Opt_SpecConstr dflags
742 liberate_case = dopt Opt_LiberateCase dflags
743 rule_check = ruleCheck dflags
744 vectorisation = dopt Opt_Vectorise dflags
747 if opt_level == 0 then
749 CoreDoSimplify (SimplPhase 0) [
750 MaxSimplifierIterations max_iter
753 else {- opt_level >= 1 -} [
755 -- initial simplify: mk specialiser happy: minimum effort please
756 CoreDoSimplify SimplGently [
758 -- Don't inline anything till full laziness has bitten
759 -- In particular, inlining wrappers inhibits floating
760 -- e.g. ...(case f x of ...)...
761 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
762 -- ==> ...(case x of I# x# -> case fw x# of ...)...
763 -- and now the redex (f x) isn't floatable any more
764 -- Similarly, don't apply any rules until after full
765 -- laziness. Notably, list fusion can prevent floating.
767 NoCaseOfCase, -- Don't do case-of-case transformations.
768 -- This makes full laziness work better
769 MaxSimplifierIterations max_iter
773 -- We run vectorisation here for now, but we might also try to run
775 runWhen vectorisation (CoreDoPasses [
777 CoreDoSimplify SimplGently
779 MaxSimplifierIterations max_iter]]),
781 -- Specialisation is best done before full laziness
782 -- so that overloaded functions have all their dictionary lambdas manifest
785 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
789 CoreDoSimplify (SimplPhase 2) [
790 -- Want to run with inline phase 2 after the specialiser to give
791 -- maximum chance for fusion to work before we inline build/augment
792 -- in phase 1. This made a difference in 'ansi' where an
793 -- overloaded function wasn't inlined till too late.
794 MaxSimplifierIterations max_iter
796 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
798 CoreDoSimplify (SimplPhase 1) [
799 -- Need inline-phase2 here so that build/augment get
800 -- inlined. I found that spectral/hartel/genfft lost some useful
801 -- strictness in the function sumcode' if augment is not inlined
802 -- before strictness analysis runs
803 MaxSimplifierIterations max_iter
805 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
807 CoreDoSimplify (SimplPhase 0) [
808 -- Phase 0: allow all Ids to be inlined now
809 -- This gets foldr inlined before strictness analysis
811 MaxSimplifierIterations 3
812 -- At least 3 iterations because otherwise we land up with
813 -- huge dead expressions because of an infelicity in the
815 -- let k = BIG in foldr k z xs
816 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
817 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
821 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
823 #ifdef OLD_STRICTNESS
826 runWhen strictness (CoreDoPasses [
830 CoreDoSimplify (SimplPhase 0) [
831 MaxSimplifierIterations max_iter
834 runWhen full_laziness
835 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
836 True)), -- Float constants
837 -- nofib/spectral/hartel/wang doubles in speed if you
838 -- do full laziness late in the day. It only happens
839 -- after fusion and other stuff, so the early pass doesn't
840 -- catch it. For the record, the redex is
841 -- f_el22 (f_el21 r_midblock)
845 -- We want CSE to follow the final full-laziness pass, because it may
846 -- succeed in commoning up things floated out by full laziness.
847 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
851 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
853 -- Case-liberation for -O2. This should be after
854 -- strictness analysis and the simplification which follows it.
855 runWhen liberate_case (CoreDoPasses [
857 CoreDoSimplify (SimplPhase 0) [
858 MaxSimplifierIterations max_iter
859 ] ]), -- Run the simplifier after LiberateCase to vastly
860 -- reduce the possiblility of shadowing
861 -- Reason: see Note [Shadowing] in SpecConstr.lhs
863 runWhen spec_constr CoreDoSpecConstr,
865 -- Final clean-up simplification:
866 CoreDoSimplify (SimplPhase 0) [
867 MaxSimplifierIterations max_iter
871 -- -----------------------------------------------------------------------------
872 -- StgToDo: abstraction of stg-to-stg passes to run.
875 = StgDoMassageForProfiling -- should be (next to) last
876 -- There's also setStgVarInfo, but its absolute "lastness"
877 -- is so critical that it is hardwired in (no flag).
880 getStgToDo :: DynFlags -> [StgToDo]
882 | Just todo <- stgToDo dflags = todo -- set explicitly by user
885 stg_stats = dopt Opt_StgStats dflags
887 todo1 = if stg_stats then [D_stg_stats] else []
889 todo2 | WayProf `elem` wayNames dflags
890 = StgDoMassageForProfiling : todo1
894 -- -----------------------------------------------------------------------------
898 allFlags = map ('-':) $
899 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
900 map ("fno-"++) flags ++
902 where ok (PrefixPred _ _) = False
904 flags = map fst fFlags
906 dynamic_flags :: [(String, OptKind DynP)]
908 ( "n" , NoArg (setDynFlag Opt_DryRun) )
909 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
910 , ( "F" , NoArg (setDynFlag Opt_Pp))
911 , ( "#include" , HasArg (addCmdlineHCInclude) )
912 , ( "v" , OptIntSuffix setVerbosity )
914 ------- Specific phases --------------------------------------------
915 , ( "pgmL" , HasArg (upd . setPgmL) )
916 , ( "pgmP" , HasArg (upd . setPgmP) )
917 , ( "pgmF" , HasArg (upd . setPgmF) )
918 , ( "pgmc" , HasArg (upd . setPgmc) )
919 , ( "pgmm" , HasArg (upd . setPgmm) )
920 , ( "pgms" , HasArg (upd . setPgms) )
921 , ( "pgma" , HasArg (upd . setPgma) )
922 , ( "pgml" , HasArg (upd . setPgml) )
923 , ( "pgmdll" , HasArg (upd . setPgmdll) )
924 , ( "pgmwindres" , HasArg (upd . setPgmwindres) )
926 , ( "optL" , HasArg (upd . addOptL) )
927 , ( "optP" , HasArg (upd . addOptP) )
928 , ( "optF" , HasArg (upd . addOptF) )
929 , ( "optc" , HasArg (upd . addOptc) )
930 , ( "optm" , HasArg (upd . addOptm) )
931 , ( "opta" , HasArg (upd . addOpta) )
932 , ( "optl" , HasArg (upd . addOptl) )
933 , ( "optdep" , HasArg (upd . addOptdep) )
934 , ( "optwindres" , HasArg (upd . addOptwindres) )
936 , ( "split-objs" , NoArg (if can_split
937 then setDynFlag Opt_SplitObjs
940 -------- Linking ----------------------------------------------------
941 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
942 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
943 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
945 ------- Libraries ---------------------------------------------------
946 , ( "L" , Prefix addLibraryPath )
947 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
949 ------- Frameworks --------------------------------------------------
950 -- -framework-path should really be -F ...
951 , ( "framework-path" , HasArg addFrameworkPath )
952 , ( "framework" , HasArg (upd . addCmdlineFramework) )
954 ------- Output Redirection ------------------------------------------
955 , ( "odir" , HasArg (upd . setObjectDir . Just))
956 , ( "o" , SepArg (upd . setOutputFile . Just))
957 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
958 , ( "osuf" , HasArg (upd . setObjectSuf))
959 , ( "hcsuf" , HasArg (upd . setHcSuf))
960 , ( "hisuf" , HasArg (upd . setHiSuf))
961 , ( "hidir" , HasArg (upd . setHiDir . Just))
962 , ( "tmpdir" , HasArg (upd . setTmpDir))
963 , ( "stubdir" , HasArg (upd . setStubDir . Just))
965 ------- Keeping temporary files -------------------------------------
966 -- These can be singular (think ghc -c) or plural (think ghc --make)
967 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
968 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
969 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
970 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
971 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
972 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
973 -- This only makes sense as plural
974 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
976 ------- Miscellaneous ----------------------------------------------
977 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
978 , ( "main-is" , SepArg setMainIs )
979 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
980 , ( "hpcdir" , SepArg setOptHpcDir )
982 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
983 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
984 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
986 ------- Packages ----------------------------------------------------
987 , ( "package-conf" , HasArg extraPkgConf_ )
988 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
989 , ( "package-name" , HasArg (upd . setPackageName) )
990 , ( "package" , HasArg exposePackage )
991 , ( "hide-package" , HasArg hidePackage )
992 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
993 , ( "ignore-package" , HasArg ignorePackage )
994 , ( "syslib" , HasArg exposePackage ) -- for compatibility
996 ------ HsCpp opts ---------------------------------------------------
997 , ( "D", AnySuffix (upd . addOptP) )
998 , ( "U", AnySuffix (upd . addOptP) )
1000 ------- Include/Import Paths ----------------------------------------
1001 , ( "I" , Prefix addIncludePath)
1002 , ( "i" , OptPrefix addImportPath )
1004 ------ Debugging ----------------------------------------------------
1005 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
1007 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
1008 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
1009 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1010 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1011 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1012 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1013 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1014 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1015 , ( "ddump-asm-regalloc-stages",
1016 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1017 , ( "ddrop-asm-stats", setDumpFlag Opt_D_drop_asm_stats)
1018 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1019 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1020 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1021 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1022 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1023 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1024 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1025 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1026 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1027 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1028 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1029 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1030 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1031 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1032 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1033 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1034 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1035 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1036 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1037 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1038 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1039 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1040 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1041 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1042 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1043 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1044 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1045 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1046 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1047 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1048 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1049 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1050 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1051 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1052 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1053 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1054 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1056 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1057 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1058 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1059 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1060 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1061 setVerbosity (Just 2)) )
1062 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1064 ------ Machine dependant (-m<blah>) stuff ---------------------------
1066 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1067 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1068 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1070 ------ Warning opts -------------------------------------------------
1071 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1072 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
1073 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1074 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
1075 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1077 ------ Optimisation flags ------------------------------------------
1078 , ( "O" , NoArg (upd (setOptLevel 1)))
1079 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1080 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1081 -- If the number is missing, use 1
1083 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1084 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1086 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1087 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1088 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1090 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1091 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1093 ------ Compiler flags -----------------------------------------------
1095 , ( "fasm", NoArg (setObjTarget HscAsm) )
1096 , ( "fvia-c", NoArg (setObjTarget HscC) )
1097 , ( "fvia-C", NoArg (setObjTarget HscC) )
1099 , ( "fno-code", NoArg (setTarget HscNothing))
1100 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1101 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1103 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1104 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1106 -- the rest of the -f* and -fno-* flags
1107 , ( "f", PrefixPred (isFlag fFlags)
1108 (\f -> setDynFlag (getFlag fFlags f)) )
1109 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1110 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1112 -- the -X* and -XNo* flags
1113 , ( "X", PrefixPred (isFlag xFlags)
1114 (\f -> setDynFlag (getFlag xFlags f)) )
1115 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1116 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1119 -- these -f<blah> flags can all be reversed with -fno-<blah>
1122 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1123 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1124 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1125 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1126 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1127 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1128 ( "warn-missing-fields", Opt_WarnMissingFields ),
1129 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1130 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1131 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1132 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1133 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1134 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1135 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1136 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1137 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1138 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1139 ( "warn-deprecations", Opt_WarnDeprecations ),
1140 ( "warn-orphans", Opt_WarnOrphans ),
1141 ( "warn-tabs", Opt_WarnTabs ),
1142 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1143 ( "strictness", Opt_Strictness ),
1144 ( "full-laziness", Opt_FullLaziness ),
1145 ( "liberate-case", Opt_LiberateCase ),
1146 ( "spec-constr", Opt_SpecConstr ),
1148 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1149 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1150 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1151 ( "ignore-asserts", Opt_IgnoreAsserts ),
1152 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1153 ( "do-eta-reduction", Opt_DoEtaReduction ),
1154 ( "case-merge", Opt_CaseMerge ),
1155 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1156 ( "dicts-cheap", Opt_DictsCheap ),
1157 ( "excess-precision", Opt_ExcessPrecision ),
1158 ( "asm-mangling", Opt_DoAsmMangling ),
1159 ( "print-bind-result", Opt_PrintBindResult ),
1160 ( "force-recomp", Opt_ForceRecomp ),
1161 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1162 ( "rewrite-rules", Opt_RewriteRules ),
1163 ( "break-on-exception", Opt_BreakOnException ),
1164 ( "vectorise", Opt_Vectorise ),
1165 ( "regs-graph", Opt_RegsGraph),
1166 -- Deprecated in favour of -XTemplateHaskell:
1167 ( "th", Opt_TemplateHaskell ),
1168 -- Deprecated in favour of -XForeignFunctionInterface:
1169 ( "fi", Opt_ForeignFunctionInterface ),
1170 -- Deprecated in favour of -XForeignFunctionInterface:
1171 ( "ffi", Opt_ForeignFunctionInterface ),
1172 -- Deprecated in favour of -XArrows:
1173 ( "arrows", Opt_Arrows ),
1174 -- Deprecated in favour of -XGenerics:
1175 ( "generics", Opt_Generics ),
1176 -- Deprecated in favour of -XImplicitPrelude:
1177 ( "implicit-prelude", Opt_ImplicitPrelude ),
1178 -- Deprecated in favour of -XBangPatterns:
1179 ( "bang-patterns", Opt_BangPatterns ),
1180 -- Deprecated in favour of -XMonomorphismRestriction:
1181 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1182 -- Deprecated in favour of -XMonoPatBinds:
1183 ( "mono-pat-binds", Opt_MonoPatBinds ),
1184 -- Deprecated in favour of -XExtendedDefaultRules:
1185 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1186 -- Deprecated in favour of -XImplicitParams:
1187 ( "implicit-params", Opt_ImplicitParams ),
1188 -- Deprecated in favour of -XScopedTypeVariables:
1189 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1190 -- Deprecated in favour of -XPArr:
1191 ( "parr", Opt_PArr ),
1192 -- Deprecated in favour of -XOverlappingInstances:
1193 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1194 -- Deprecated in favour of -XUndecidableInstances:
1195 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1196 -- Deprecated in favour of -XIncoherentInstances:
1197 ( "allow-incoherent-instances", Opt_IncoherentInstances ),
1198 ( "gen-manifest", Opt_GenManifest ),
1199 ( "embed-manifest", Opt_EmbedManifest )
1202 supportedLanguages :: [String]
1203 supportedLanguages = map fst xFlags
1205 -- These -X<blah> flags can all be reversed with -XNo<blah>
1206 xFlags :: [(String, DynFlag)]
1209 ( "PatternGuards", Opt_PatternGuards ),
1210 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1211 ( "MagicHash", Opt_MagicHash ),
1212 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1213 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1214 ( "KindSignatures", Opt_KindSignatures ),
1215 ( "PatternSignatures", Opt_PatternSignatures ),
1216 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1217 ( "ParallelListComp", Opt_ParallelListComp ),
1218 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1219 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1220 ( "PartiallyAppliedClosedTypeSynonyms",
1221 Opt_PartiallyAppliedClosedTypeSynonyms ),
1222 ( "Rank2Types", Opt_Rank2Types ),
1223 ( "RankNTypes", Opt_RankNTypes ),
1224 ( "TypeOperators", Opt_TypeOperators ),
1225 ( "RecursiveDo", Opt_RecursiveDo ),
1226 ( "Arrows", Opt_Arrows ),
1227 ( "PArr", Opt_PArr ),
1228 ( "TemplateHaskell", Opt_TemplateHaskell ),
1229 ( "Generics", Opt_Generics ),
1231 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1232 ( "RecordWildCards", Opt_RecordWildCards ),
1233 ( "RecordPuns", Opt_RecordPuns ),
1234 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1235 ( "OverloadedStrings", Opt_OverloadedStrings ),
1236 ( "GADTs", Opt_GADTs ),
1237 ( "TypeFamilies", Opt_TypeFamilies ),
1238 ( "BangPatterns", Opt_BangPatterns ),
1240 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1241 -- On by default (which is not strictly H98):
1242 ( "MonoPatBinds", Opt_MonoPatBinds ),
1243 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1244 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1245 ( "ImplicitParams", Opt_ImplicitParams ),
1246 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1247 ( "UnboxedTuples", Opt_UnboxedTuples ),
1248 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1249 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1250 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1251 ( "FlexibleContexts", Opt_FlexibleContexts ),
1252 ( "FlexibleInstances", Opt_FlexibleInstances ),
1253 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1254 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1255 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1256 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1257 ( "OverlappingInstances", Opt_OverlappingInstances ),
1258 ( "UndecidableInstances", Opt_UndecidableInstances ),
1259 ( "IncoherentInstances", Opt_IncoherentInstances )
1262 impliedFlags :: [(DynFlag, [DynFlag])]
1264 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1267 glasgowExtsFlags = [
1268 Opt_PrintExplicitForalls
1269 , Opt_ForeignFunctionInterface
1270 , Opt_UnliftedFFITypes
1272 , Opt_ImplicitParams
1273 , Opt_ScopedTypeVariables
1275 , Opt_TypeSynonymInstances
1276 , Opt_StandaloneDeriving
1277 , Opt_DeriveDataTypeable
1278 , Opt_FlexibleContexts
1279 , Opt_FlexibleInstances
1280 , Opt_ConstrainedClassMethods
1281 , Opt_MultiParamTypeClasses
1282 , Opt_FunctionalDependencies
1284 , Opt_PolymorphicComponents
1285 , Opt_ExistentialQuantification
1288 , Opt_PartiallyAppliedClosedTypeSynonyms
1292 , Opt_ParallelListComp
1293 , Opt_EmptyDataDecls
1294 , Opt_KindSignatures
1295 , Opt_PatternSignatures
1296 , Opt_GeneralizedNewtypeDeriving
1297 , Opt_TypeFamilies ]
1300 isFlag :: [(String,a)] -> String -> Bool
1301 isFlag flags f = any (\(ff,_) -> ff == f) flags
1303 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1304 isPrefFlag pref flags no_f
1305 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1309 getFlag :: [(String,a)] -> String -> a
1310 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1312 [] -> panic ("get_flag " ++ f)
1314 getPrefFlag :: String -> [(String,a)] -> String -> a
1315 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1316 -- We should only be passed flags which match the prefix
1318 -- -----------------------------------------------------------------------------
1319 -- Parsing the dynamic flags.
1321 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1322 parseDynamicFlags dflags args = do
1323 let ((leftover,errs),dflags')
1324 = runCmdLine (processArgs dynamic_flags args) dflags
1325 when (not (null errs)) $ do
1326 throwDyn (UsageError (unlines errs))
1327 return (dflags', leftover)
1330 type DynP = CmdLineP DynFlags
1332 upd :: (DynFlags -> DynFlags) -> DynP ()
1334 dfs <- getCmdLineState
1335 putCmdLineState $! (f dfs)
1337 --------------------------
1338 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1339 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1341 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1342 -- When you set f, set the ones it implies
1343 -- When you un-set f, however, we don't un-set the things it implies
1344 -- (except for -fno-glasgow-exts, which is treated specially)
1346 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1348 --------------------------
1349 setDumpFlag :: DynFlag -> OptKind DynP
1350 setDumpFlag dump_flag
1351 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1352 -- Whenver we -ddump, switch off the recompilation checker,
1353 -- else you don't see the dump!
1355 setVerbosity :: Maybe Int -> DynP ()
1356 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1358 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1360 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1363 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1365 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1367 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1370 | Nothing <- unpackPackageId pid
1371 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1373 = \s -> s{ thisPackage = pid }
1375 pid = stringToPackageId p
1377 -- If we're linking a binary, then only targets that produce object
1378 -- code are allowed (requests for other target types are ignored).
1379 setTarget l = upd set
1382 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1385 -- Changes the target only if we're compiling object code. This is
1386 -- used by -fasm and -fvia-C, which switch from one to the other, but
1387 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1388 -- can be safely used in an OPTIONS_GHC pragma.
1389 setObjTarget l = upd set
1392 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1395 setOptLevel :: Int -> DynFlags -> DynFlags
1396 setOptLevel n dflags
1397 | hscTarget dflags == HscInterpreted && n > 0
1399 -- not in IO any more, oh well:
1400 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1402 = updOptLevel n dflags
1405 setMainIs :: String -> DynP ()
1407 | not (null main_fn) -- The arg looked like "Foo.baz"
1408 = upd $ \d -> d{ mainFunIs = Just main_fn,
1409 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1411 | isUpper (head main_mod) -- The arg looked like "Foo"
1412 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1414 | otherwise -- The arg looked like "baz"
1415 = upd $ \d -> d{ mainFunIs = Just main_mod }
1417 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1419 -----------------------------------------------------------------------------
1420 -- Paths & Libraries
1422 -- -i on its own deletes the import paths
1423 addImportPath "" = upd (\s -> s{importPaths = []})
1424 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1428 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1431 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1433 addFrameworkPath p =
1434 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1436 split_marker = ':' -- not configurable (ToDo)
1438 splitPathList :: String -> [String]
1439 splitPathList s = filter notNull (splitUp s)
1440 -- empty paths are ignored: there might be a trailing
1441 -- ':' in the initial list, for example. Empty paths can
1442 -- cause confusion when they are translated into -I options
1443 -- for passing to gcc.
1445 #ifndef mingw32_TARGET_OS
1446 splitUp xs = split split_marker xs
1448 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1450 -- That is, if "foo:bar:baz" is used, this interpreted as
1451 -- consisting of three entries, 'foo', 'bar', 'baz'.
1452 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1453 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1455 -- Notice that no attempt is made to fully replace the 'standard'
1456 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1457 -- that this will cause too much breakage for users & ':' will
1458 -- work fine even with DOS paths, if you're not insisting on being silly.
1461 splitUp (x:':':div:xs) | div `elem` dir_markers
1462 = ((x:':':div:p): splitUp rs)
1464 (p,rs) = findNextPath xs
1465 -- we used to check for existence of the path here, but that
1466 -- required the IO monad to be threaded through the command-line
1467 -- parser which is quite inconvenient. The
1468 splitUp xs = cons p (splitUp rs)
1470 (p,rs) = findNextPath xs
1475 -- will be called either when we've consumed nought or the
1476 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1477 -- finding the next split marker.
1479 case break (`elem` split_markers) xs of
1480 (p, d:ds) -> (p, ds)
1483 split_markers :: [Char]
1484 split_markers = [':', ';']
1486 dir_markers :: [Char]
1487 dir_markers = ['/', '\\']
1490 -- -----------------------------------------------------------------------------
1491 -- tmpDir, where we store temporary files.
1493 setTmpDir :: FilePath -> DynFlags -> DynFlags
1494 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1496 #if !defined(mingw32_HOST_OS)
1497 canonicalise p = normalisePath p
1499 -- Canonicalisation of temp path under win32 is a bit more
1500 -- involved: (a) strip trailing slash,
1501 -- (b) normalise slashes
1502 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1504 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1506 -- if we're operating under cygwin, and TMP/TEMP is of
1507 -- the form "/cygdrive/drive/path", translate this to
1508 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1509 -- understand /cygdrive paths.)
1511 | "/cygdrive/" `isPrefixOf` path =
1512 case drop (length "/cygdrive/") path of
1513 drive:xs@('/':_) -> drive:':':xs
1517 -- strip the trailing backslash (awful, but we only do this once).
1518 removeTrailingSlash path =
1525 -----------------------------------------------------------------------------
1528 setOptHpcDir :: String -> DynP ()
1529 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1531 -----------------------------------------------------------------------------
1532 -- Via-C compilation stuff
1534 -- There are some options that we need to pass to gcc when compiling
1535 -- Haskell code via C, but are only supported by recent versions of
1536 -- gcc. The configure script decides which of these options we need,
1537 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1538 -- read before each via-C compilation. The advantage of having these
1539 -- in a separate file is that the file can be created at install-time
1540 -- depending on the available gcc version, and even re-generated later
1541 -- if gcc is upgraded.
1543 -- The options below are not dependent on the version of gcc, only the
1546 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1547 [String]) -- for registerised HC compilations
1548 machdepCCOpts dflags
1549 #if alpha_TARGET_ARCH
1551 #ifdef HAVE_THREADED_RTS_SUPPORT
1555 -- For now, to suppress the gcc warning "call-clobbered
1556 -- register used for global register variable", we simply
1557 -- disable all warnings altogether using the -w flag. Oh well.
1559 #elif hppa_TARGET_ARCH
1560 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1561 -- (very nice, but too bad the HP /usr/include files don't agree.)
1562 = ( ["-D_HPUX_SOURCE"], [] )
1564 #elif m68k_TARGET_ARCH
1565 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1566 -- popping of args to routines to be explicit; if we let things
1567 -- be deferred 'til after an STGJUMP, imminent death is certain!
1569 -- -fomit-frame-pointer : *don't*
1570 -- It's better to have a6 completely tied up being a frame pointer
1571 -- rather than let GCC pick random things to do with it.
1572 -- (If we want to steal a6, then we would try to do things
1573 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1574 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1576 #elif i386_TARGET_ARCH
1577 -- -fno-defer-pop : basically the same game as for m68k
1579 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1580 -- the fp (%ebp) for our register maps.
1581 = let n_regs = stolen_x86_regs dflags
1584 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1585 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1588 "-fomit-frame-pointer",
1589 -- we want -fno-builtin, because when gcc inlines
1590 -- built-in functions like memcpy() it tends to
1591 -- run out of registers, requiring -monly-n-regs
1593 "-DSTOLEN_X86_REGS="++show n_regs ]
1596 #elif ia64_TARGET_ARCH
1597 = ( [], ["-fomit-frame-pointer", "-G0"] )
1599 #elif x86_64_TARGET_ARCH
1600 = ( [], ["-fomit-frame-pointer",
1601 "-fno-asynchronous-unwind-tables",
1602 -- the unwind tables are unnecessary for HC code,
1603 -- and get in the way of -split-objs. Another option
1604 -- would be to throw them away in the mangler, but this
1607 -- calling builtins like strlen() using the FFI can
1608 -- cause gcc to run out of regs, so use the external
1612 #elif sparc_TARGET_ARCH
1614 -- For now, to suppress the gcc warning "call-clobbered
1615 -- register used for global register variable", we simply
1616 -- disable all warnings altogether using the -w flag. Oh well.
1618 #elif powerpc_apple_darwin_TARGET
1620 -- Disable Apple's precompiling preprocessor. It's a great thing
1621 -- for "normal" programs, but it doesn't support register variable
1623 = ( [], ["-no-cpp-precomp"] )
1628 picCCOpts :: DynFlags -> [String]
1630 #if darwin_TARGET_OS
1631 -- Apple prefers to do things the other way round.
1632 -- PIC is on by default.
1633 -- -mdynamic-no-pic:
1634 -- Turn off PIC code generation.
1636 -- Don't generate "common" symbols - these are unwanted
1637 -- in dynamic libraries.
1640 = ["-fno-common", "-D__PIC__"]
1642 = ["-mdynamic-no-pic"]
1643 #elif mingw32_TARGET_OS
1644 -- no -fPIC for Windows
1651 = ["-fPIC", "-D__PIC__"]
1656 -- -----------------------------------------------------------------------------
1660 can_split = cSplitObjs == "YES"
1662 -- -----------------------------------------------------------------------------
1665 compilerInfo :: [(String, String)]
1666 compilerInfo = [("Project name", cProjectName),
1667 ("Project version", cProjectVersion),
1668 ("Booter version", cBooterVersion),
1670 ("Interface file version", cHscIfaceFileVersion),
1671 ("Object splitting", cSplitObjs),
1672 ("Have native code generator", cGhcWithNativeCodeGen),
1673 ("Unregisterised", cGhcUnregisterised),
1674 ("Tables next to code", cGhcEnableTablesNextToCode),
1675 ("Win32 DLLs", cEnableWin32DLLs),
1676 ("Leading underscore", cLeadingUnderscore)]