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
110 | Opt_D_dump_inlinings
111 | Opt_D_dump_rule_firings
112 | Opt_D_dump_occur_anal
116 | Opt_D_dump_simpl_iterations
125 | Opt_D_dump_worker_wrapper
126 | Opt_D_dump_rn_trace
127 | Opt_D_dump_rn_stats
129 | Opt_D_dump_simpl_stats
130 | Opt_D_dump_tc_trace
131 | Opt_D_dump_if_trace
137 | Opt_D_verbose_core2core
138 | Opt_D_verbose_stg2stg
140 | Opt_D_dump_hi_diffs
141 | Opt_D_dump_minimal_imports
142 | Opt_D_dump_mod_cycles
143 | Opt_D_faststring_stats
148 | Opt_WarnIsError -- -Werror; makes warnings fatal
149 | Opt_WarnDuplicateExports
151 | Opt_WarnImplicitPrelude
152 | Opt_WarnIncompletePatterns
153 | Opt_WarnIncompletePatternsRecUpd
154 | Opt_WarnMissingFields
155 | Opt_WarnMissingMethods
156 | Opt_WarnMissingSigs
157 | Opt_WarnNameShadowing
158 | Opt_WarnOverlappingPatterns
159 | Opt_WarnSimplePatterns
160 | Opt_WarnTypeDefaults
161 | Opt_WarnMonomorphism
162 | Opt_WarnUnusedBinds
163 | Opt_WarnUnusedImports
164 | Opt_WarnUnusedMatches
165 | Opt_WarnDeprecations
166 | Opt_WarnDodgyImports
171 | Opt_OverlappingInstances
172 | Opt_UndecidableInstances
173 | Opt_IncoherentInstances
174 | Opt_MonomorphismRestriction
176 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
177 | Opt_ForeignFunctionInterface
178 | Opt_UnliftedFFITypes
179 | Opt_PArr -- Syntactic support for parallel arrays
180 | Opt_Arrows -- Arrow-notation syntax
181 | Opt_TemplateHaskell
184 | Opt_ImplicitPrelude
185 | Opt_ScopedTypeVariables
189 | Opt_OverloadedStrings
190 | Opt_DisambiguateRecordFields
191 | Opt_RecordWildCards
195 | Opt_StandaloneDeriving
196 | Opt_DeriveDataTypeable
197 | Opt_TypeSynonymInstances
198 | Opt_FlexibleContexts
199 | Opt_FlexibleInstances
200 | Opt_ConstrainedClassMethods
201 | Opt_MultiParamTypeClasses
202 | Opt_FunctionalDependencies
204 | Opt_PolymorphicComponents
205 | Opt_ExistentialQuantification
209 | Opt_PatternSignatures
210 | Opt_ParallelListComp
211 | Opt_GeneralizedNewtypeDeriving
214 | Opt_PartiallyAppliedClosedTypeSynonyms
219 | Opt_PrintExplicitForalls
227 | Opt_IgnoreInterfacePragmas
228 | Opt_OmitInterfacePragmas
229 | Opt_DoLambdaEtaExpansion
231 | Opt_IgnoreBreakpoints
234 | Opt_UnboxStrictFields
246 | Opt_ExcessPrecision
247 | Opt_ReadUserPackageConf
251 | Opt_HideAllPackages
252 | Opt_PrintBindResult
255 | Opt_BreakOnException
266 data DynFlags = DynFlags {
269 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
270 stgToDo :: Maybe [StgToDo], -- similarly
271 hscTarget :: HscTarget,
272 hscOutName :: String, -- name of the output file
273 extCoreName :: String, -- name of the .core output file
274 verbosity :: Int, -- verbosity level
275 optLevel :: Int, -- optimisation level
276 maxSimplIterations :: Int, -- max simplifier iterations
277 ruleCheck :: Maybe String,
279 specThreshold :: Int, -- Threshold for function specialisation
281 stolen_x86_regs :: Int,
282 cmdlineHcIncludes :: [String], -- -#includes
283 importPaths :: [FilePath],
285 mainFunIs :: Maybe String,
286 ctxtStkDepth :: Int, -- Typechecker context stack depth
288 thisPackage :: PackageId,
291 wayNames :: [WayName], -- way flags from the cmd line
292 buildTag :: String, -- the global "way" (eg. "p" for prof)
293 rtsBuildTag :: String, -- the RTS "way"
296 objectDir :: Maybe String,
297 hiDir :: Maybe String,
298 stubDir :: Maybe String,
304 outputFile :: Maybe String,
305 outputHi :: Maybe String,
307 includePaths :: [String],
308 libraryPaths :: [String],
309 frameworkPaths :: [String], -- used on darwin only
310 cmdlineFrameworks :: [String], -- ditto
311 tmpDir :: String, -- no trailing '/'
313 ghcUsagePath :: FilePath, -- Filled in by SysTools
314 ghciUsagePath :: FilePath, -- ditto
316 hpcDir :: String, -- ^ path to store the .mix files
318 -- options for particular phases
329 -- commands for particular phases
331 pgm_P :: (String,[Option]),
333 pgm_c :: (String,[Option]),
334 pgm_m :: (String,[Option]),
335 pgm_s :: (String,[Option]),
336 pgm_a :: (String,[Option]),
337 pgm_l :: (String,[Option]),
338 pgm_dll :: (String,[Option]),
340 pgm_sysman :: String,
343 extraPkgConfs :: [FilePath],
344 topDir :: FilePath, -- filled in by SysTools
345 systemPackageConfig :: FilePath, -- ditto
346 -- The -package-conf flags given on the command line, in the order
349 packageFlags :: [PackageFlag],
350 -- The -package and -hide-package flags from the command-line
353 -- NB. do not modify this field, it is calculated by
354 -- Packages.initPackages and Packages.updatePackages.
355 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
356 pkgState :: PackageState,
362 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
373 -- | will this target result in an object file on the disk?
374 isObjectTarget :: HscTarget -> Bool
375 isObjectTarget HscC = True
376 isObjectTarget HscAsm = True
377 isObjectTarget _ = False
379 -- | The 'GhcMode' tells us whether we're doing multi-module
380 -- compilation (controlled via the "GHC" API) or one-shot
381 -- (single-module) compilation. This makes a difference primarily to
382 -- the "Finder": in one-shot mode we look for interface files for
383 -- imported modules, but in multi-module mode we look for source files
384 -- in order to check whether they need to be recompiled.
386 = CompManager -- ^ --make, GHCi, etc.
387 | OneShot -- ^ ghc -c Foo.hs
388 | MkDepend -- ^ ghc -M, see Finder for why we need this
391 isOneShot :: GhcMode -> Bool
392 isOneShot OneShot = True
393 isOneShot _other = False
395 -- | What kind of linking to do.
396 data GhcLink -- What to do in the link step, if there is one
397 = NoLink -- Don't link at all
398 | LinkBinary -- Link object code into a binary
399 | LinkInMemory -- Use the in-memory dynamic linker
400 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
403 isNoLink :: GhcLink -> Bool
404 isNoLink NoLink = True
405 isNoLink other = False
408 = ExposePackage String
410 | IgnorePackage String
413 defaultHscTarget = defaultObjectTarget
415 -- | the 'HscTarget' value corresponding to the default way to create
416 -- object files on the current platform.
418 | cGhcWithNativeCodeGen == "YES" = HscAsm
421 initDynFlags dflags = do
422 -- someday these will be dynamic flags
423 ways <- readIORef v_Ways
424 build_tag <- readIORef v_Build_tag
425 rts_build_tag <- readIORef v_RTS_Build_tag
428 buildTag = build_tag,
429 rtsBuildTag = rts_build_tag
434 ghcMode = CompManager,
435 ghcLink = LinkBinary,
438 hscTarget = defaultHscTarget,
443 maxSimplIterations = 4,
447 cmdlineHcIncludes = [],
451 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
453 thisPackage = mainPackageId,
459 objectSuf = phaseInputExt StopLn,
460 hcSuf = phaseInputExt HCc,
463 outputFile = Nothing,
468 cmdlineFrameworks = [],
469 tmpDir = cDEFAULT_TMPDIR,
485 pkgDatabase = Nothing,
486 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
488 Opt_ReadUserPackageConf,
490 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
491 -- behaviour the default, to see if anyone notices
495 Opt_MonomorphismRestriction,
500 Opt_PrintBindResult ]
501 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
502 -- The default -O0 options
505 log_action = \severity srcSpan style msg ->
507 SevInfo -> hPutStrLn stderr (show (msg style))
508 SevFatal -> hPutStrLn stderr (show (msg style))
509 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
515 0 | print errors & warnings only
516 1 | minimal verbosity: print "compiling M ... done." for each module.
517 2 | equivalent to -dshow-passes
518 3 | equivalent to existing "ghc -v"
519 4 | "ghc -v -ddump-most"
520 5 | "ghc -v -ddump-all"
523 dopt :: DynFlag -> DynFlags -> Bool
524 dopt f dflags = f `elem` (flags dflags)
526 dopt_set :: DynFlags -> DynFlag -> DynFlags
527 dopt_set dfs f = dfs{ flags = f : flags dfs }
529 dopt_unset :: DynFlags -> DynFlag -> DynFlags
530 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
532 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
533 getOpts dflags opts = reverse (opts dflags)
534 -- We add to the options from the front, so we need to reverse the list
536 getVerbFlag :: DynFlags -> String
538 | verbosity dflags >= 3 = "-v"
541 setObjectDir f d = d{ objectDir = f}
542 setHiDir f d = d{ hiDir = f}
543 setStubDir f d = d{ stubDir = f}
545 setObjectSuf f d = d{ objectSuf = f}
546 setHiSuf f d = d{ hiSuf = f}
547 setHcSuf f d = d{ hcSuf = f}
549 setOutputFile f d = d{ outputFile = f}
550 setOutputHi f d = d{ outputHi = f}
552 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
553 -- Config.hs should really use Option.
554 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
556 setPgmL f d = d{ pgm_L = f}
557 setPgmF f d = d{ pgm_F = f}
558 setPgmc f d = d{ pgm_c = (f,[])}
559 setPgmm f d = d{ pgm_m = (f,[])}
560 setPgms f d = d{ pgm_s = (f,[])}
561 setPgma f d = d{ pgm_a = (f,[])}
562 setPgml f d = d{ pgm_l = (f,[])}
563 setPgmdll f d = d{ pgm_dll = (f,[])}
565 addOptL f d = d{ opt_L = f : opt_L d}
566 addOptP f d = d{ opt_P = f : opt_P d}
567 addOptF f d = d{ opt_F = f : opt_F d}
568 addOptc f d = d{ opt_c = f : opt_c d}
569 addOptm f d = d{ opt_m = f : opt_m d}
570 addOpta f d = d{ opt_a = f : opt_a d}
571 addOptl f d = d{ opt_l = f : opt_l d}
572 addOptdll f d = d{ opt_dll = f : opt_dll d}
573 addOptdep f d = d{ opt_dep = f : opt_dep d}
575 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
577 -- -----------------------------------------------------------------------------
578 -- Command-line options
580 -- When invoking external tools as part of the compilation pipeline, we
581 -- pass these a sequence of options on the command-line. Rather than
582 -- just using a list of Strings, we use a type that allows us to distinguish
583 -- between filepaths and 'other stuff'. [The reason being, of course, that
584 -- this type gives us a handle on transforming filenames, and filenames only,
585 -- to whatever format they're expected to be on a particular platform.]
588 = FileOption -- an entry that _contains_ filename(s) / filepaths.
589 String -- a non-filepath prefix that shouldn't be
590 -- transformed (e.g., "/out=")
591 String -- the filepath/filename portion
594 -----------------------------------------------------------------------------
595 -- Setting the optimisation level
597 updOptLevel :: Int -> DynFlags -> DynFlags
598 -- Set dynflags appropriate to the optimisation level
600 = dfs2{ optLevel = final_n }
602 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
603 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
604 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
606 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
607 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
609 optLevelFlags :: [([Int], DynFlag)]
611 = [ ([0], Opt_IgnoreInterfacePragmas)
612 , ([0], Opt_OmitInterfacePragmas)
614 , ([1,2], Opt_IgnoreAsserts)
615 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
617 , ([1,2], Opt_DoEtaReduction)
618 , ([1,2], Opt_CaseMerge)
619 , ([1,2], Opt_Strictness)
621 , ([1,2], Opt_FullLaziness)
623 , ([2], Opt_LiberateCase)
624 , ([2], Opt_SpecConstr)
626 , ([0,1,2], Opt_DoLambdaEtaExpansion)
627 -- This one is important for a tiresome reason:
628 -- we want to make sure that the bindings for data
629 -- constructors are eta-expanded. This is probably
630 -- a good thing anyway, but it seems fragile.
633 -- -----------------------------------------------------------------------------
634 -- Standard sets of warning options
637 = [ Opt_WarnDeprecations,
638 Opt_WarnOverlappingPatterns,
639 Opt_WarnMissingFields,
640 Opt_WarnMissingMethods,
641 Opt_WarnDuplicateExports
645 = standardWarnings ++
646 [ Opt_WarnUnusedBinds,
647 Opt_WarnUnusedMatches,
648 Opt_WarnUnusedImports,
649 Opt_WarnIncompletePatterns,
655 [ Opt_WarnTypeDefaults,
656 Opt_WarnNameShadowing,
662 -- minuswRemovesOpts should be every warning option
665 [Opt_WarnImplicitPrelude,
666 Opt_WarnIncompletePatternsRecUpd,
667 Opt_WarnSimplePatterns,
668 Opt_WarnMonomorphism,
672 -- -----------------------------------------------------------------------------
673 -- CoreToDo: abstraction of core-to-core passes to run.
675 data CoreToDo -- These are diff core-to-core passes,
676 -- which may be invoked in any order,
677 -- as many times as you like.
679 = CoreDoSimplify -- The core-to-core simplifier.
682 -- Each run of the simplifier can take a different
683 -- set of simplifier-specific flags.
685 | CoreDoFloatOutwards FloatOutSwitches
690 | CoreDoWorkerWrapper
693 | CoreDoOldStrictness
696 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
697 -- matching this string
698 | CoreDoVectorisation
699 | CoreDoNothing -- Useful when building up
700 | CoreDoPasses [CoreToDo] -- lists of these things
702 data SimplifierMode -- See comments in SimplMonad
706 data SimplifierSwitch
707 = MaxSimplifierIterations Int
710 data FloatOutSwitches
711 = FloatOutSw Bool -- True <=> float lambdas to top level
712 Bool -- True <=> float constants to top level,
713 -- even if they do not escape a lambda
716 -- The core-to-core pass ordering is derived from the DynFlags:
717 runWhen :: Bool -> CoreToDo -> CoreToDo
718 runWhen True do_this = do_this
719 runWhen False do_this = CoreDoNothing
721 getCoreToDo :: DynFlags -> [CoreToDo]
723 | Just todo <- coreToDo dflags = todo -- set explicitly by user
724 | otherwise = core_todo
726 opt_level = optLevel dflags
727 max_iter = maxSimplIterations dflags
728 strictness = dopt Opt_Strictness dflags
729 full_laziness = dopt Opt_FullLaziness dflags
730 cse = dopt Opt_CSE dflags
731 spec_constr = dopt Opt_SpecConstr dflags
732 liberate_case = dopt Opt_LiberateCase dflags
733 rule_check = ruleCheck dflags
734 vectorisation = dopt Opt_Vectorise dflags
737 if opt_level == 0 then
739 CoreDoSimplify (SimplPhase 0) [
740 MaxSimplifierIterations max_iter
743 else {- opt_level >= 1 -} [
745 -- initial simplify: mk specialiser happy: minimum effort please
746 CoreDoSimplify SimplGently [
748 -- Don't inline anything till full laziness has bitten
749 -- In particular, inlining wrappers inhibits floating
750 -- e.g. ...(case f x of ...)...
751 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
752 -- ==> ...(case x of I# x# -> case fw x# of ...)...
753 -- and now the redex (f x) isn't floatable any more
754 -- Similarly, don't apply any rules until after full
755 -- laziness. Notably, list fusion can prevent floating.
757 NoCaseOfCase, -- Don't do case-of-case transformations.
758 -- This makes full laziness work better
759 MaxSimplifierIterations max_iter
763 -- We run vectorisation here for now, but we might also try to run
765 runWhen vectorisation (CoreDoPasses [
767 CoreDoSimplify SimplGently
769 MaxSimplifierIterations max_iter]]),
771 -- Specialisation is best done before full laziness
772 -- so that overloaded functions have all their dictionary lambdas manifest
775 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
779 CoreDoSimplify (SimplPhase 2) [
780 -- Want to run with inline phase 2 after the specialiser to give
781 -- maximum chance for fusion to work before we inline build/augment
782 -- in phase 1. This made a difference in 'ansi' where an
783 -- overloaded function wasn't inlined till too late.
784 MaxSimplifierIterations max_iter
786 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
788 CoreDoSimplify (SimplPhase 1) [
789 -- Need inline-phase2 here so that build/augment get
790 -- inlined. I found that spectral/hartel/genfft lost some useful
791 -- strictness in the function sumcode' if augment is not inlined
792 -- before strictness analysis runs
793 MaxSimplifierIterations max_iter
795 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
797 CoreDoSimplify (SimplPhase 0) [
798 -- Phase 0: allow all Ids to be inlined now
799 -- This gets foldr inlined before strictness analysis
801 MaxSimplifierIterations 3
802 -- At least 3 iterations because otherwise we land up with
803 -- huge dead expressions because of an infelicity in the
805 -- let k = BIG in foldr k z xs
806 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
807 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
811 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
813 #ifdef OLD_STRICTNESS
816 runWhen strictness (CoreDoPasses [
820 CoreDoSimplify (SimplPhase 0) [
821 MaxSimplifierIterations max_iter
824 runWhen full_laziness
825 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
826 True)), -- Float constants
827 -- nofib/spectral/hartel/wang doubles in speed if you
828 -- do full laziness late in the day. It only happens
829 -- after fusion and other stuff, so the early pass doesn't
830 -- catch it. For the record, the redex is
831 -- f_el22 (f_el21 r_midblock)
835 -- We want CSE to follow the final full-laziness pass, because it may
836 -- succeed in commoning up things floated out by full laziness.
837 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
841 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
843 -- Case-liberation for -O2. This should be after
844 -- strictness analysis and the simplification which follows it.
845 runWhen liberate_case (CoreDoPasses [
847 CoreDoSimplify (SimplPhase 0) [
848 MaxSimplifierIterations max_iter
849 ] ]), -- Run the simplifier after LiberateCase to vastly
850 -- reduce the possiblility of shadowing
851 -- Reason: see Note [Shadowing] in SpecConstr.lhs
853 runWhen spec_constr CoreDoSpecConstr,
855 -- Final clean-up simplification:
856 CoreDoSimplify (SimplPhase 0) [
857 MaxSimplifierIterations max_iter
861 -- -----------------------------------------------------------------------------
862 -- StgToDo: abstraction of stg-to-stg passes to run.
865 = StgDoMassageForProfiling -- should be (next to) last
866 -- There's also setStgVarInfo, but its absolute "lastness"
867 -- is so critical that it is hardwired in (no flag).
870 getStgToDo :: DynFlags -> [StgToDo]
872 | Just todo <- stgToDo dflags = todo -- set explicitly by user
875 stg_stats = dopt Opt_StgStats dflags
877 todo1 = if stg_stats then [D_stg_stats] else []
879 todo2 | WayProf `elem` wayNames dflags
880 = StgDoMassageForProfiling : todo1
884 -- -----------------------------------------------------------------------------
888 allFlags = map ('-':) $
889 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
890 map ("fno-"++) flags ++
892 where ok (PrefixPred _ _) = False
894 flags = map fst fFlags
896 dynamic_flags :: [(String, OptKind DynP)]
898 ( "n" , NoArg (setDynFlag Opt_DryRun) )
899 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
900 , ( "F" , NoArg (setDynFlag Opt_Pp))
901 , ( "#include" , HasArg (addCmdlineHCInclude) )
902 , ( "v" , OptIntSuffix setVerbosity )
904 ------- Specific phases --------------------------------------------
905 , ( "pgmL" , HasArg (upd . setPgmL) )
906 , ( "pgmP" , HasArg (upd . setPgmP) )
907 , ( "pgmF" , HasArg (upd . setPgmF) )
908 , ( "pgmc" , HasArg (upd . setPgmc) )
909 , ( "pgmm" , HasArg (upd . setPgmm) )
910 , ( "pgms" , HasArg (upd . setPgms) )
911 , ( "pgma" , HasArg (upd . setPgma) )
912 , ( "pgml" , HasArg (upd . setPgml) )
913 , ( "pgmdll" , HasArg (upd . setPgmdll) )
915 , ( "optL" , HasArg (upd . addOptL) )
916 , ( "optP" , HasArg (upd . addOptP) )
917 , ( "optF" , HasArg (upd . addOptF) )
918 , ( "optc" , HasArg (upd . addOptc) )
919 , ( "optm" , HasArg (upd . addOptm) )
920 , ( "opta" , HasArg (upd . addOpta) )
921 , ( "optl" , HasArg (upd . addOptl) )
922 , ( "optdll" , HasArg (upd . addOptdll) )
923 , ( "optdep" , HasArg (upd . addOptdep) )
925 , ( "split-objs" , NoArg (if can_split
926 then setDynFlag Opt_SplitObjs
929 -------- Linking ----------------------------------------------------
930 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
931 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
932 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
934 ------- Libraries ---------------------------------------------------
935 , ( "L" , Prefix addLibraryPath )
936 , ( "l" , AnySuffix (\s -> do upd (addOptl s)
939 ------- Frameworks --------------------------------------------------
940 -- -framework-path should really be -F ...
941 , ( "framework-path" , HasArg addFrameworkPath )
942 , ( "framework" , HasArg (upd . addCmdlineFramework) )
944 ------- Output Redirection ------------------------------------------
945 , ( "odir" , HasArg (upd . setObjectDir . Just))
946 , ( "o" , SepArg (upd . setOutputFile . Just))
947 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
948 , ( "osuf" , HasArg (upd . setObjectSuf))
949 , ( "hcsuf" , HasArg (upd . setHcSuf))
950 , ( "hisuf" , HasArg (upd . setHiSuf))
951 , ( "hidir" , HasArg (upd . setHiDir . Just))
952 , ( "tmpdir" , HasArg (upd . setTmpDir))
953 , ( "stubdir" , HasArg (upd . setStubDir . Just))
955 ------- Keeping temporary files -------------------------------------
956 -- These can be singular (think ghc -c) or plural (think ghc --make)
957 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
958 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
959 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
960 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
961 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
962 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
963 -- This only makes sense as plural
964 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
966 ------- Miscellaneous ----------------------------------------------
967 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
968 , ( "main-is" , SepArg setMainIs )
969 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
970 , ( "hpcdir" , SepArg setOptHpcDir )
972 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
973 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
974 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
976 ------- Packages ----------------------------------------------------
977 , ( "package-conf" , HasArg extraPkgConf_ )
978 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
979 , ( "package-name" , HasArg (upd . setPackageName) )
980 , ( "package" , HasArg exposePackage )
981 , ( "hide-package" , HasArg hidePackage )
982 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
983 , ( "ignore-package" , HasArg ignorePackage )
984 , ( "syslib" , HasArg exposePackage ) -- for compatibility
986 ------ HsCpp opts ---------------------------------------------------
987 , ( "D", AnySuffix (upd . addOptP) )
988 , ( "U", AnySuffix (upd . addOptP) )
990 ------- Include/Import Paths ----------------------------------------
991 , ( "I" , Prefix addIncludePath)
992 , ( "i" , OptPrefix addImportPath )
994 ------ Debugging ----------------------------------------------------
995 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
997 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
998 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
999 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
1000 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
1001 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
1002 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
1003 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
1004 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1005 , ( "ddump-asm-regalloc-stages",
1006 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1007 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1008 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1009 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1010 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1011 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1012 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1013 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1014 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1015 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1016 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1017 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1018 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1019 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1020 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1021 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1022 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1023 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1024 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1025 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1026 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1027 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1028 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1029 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1030 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1031 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1032 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1033 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1034 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1035 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1036 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1037 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1038 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1039 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1040 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1041 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1042 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1043 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1045 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1046 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1047 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1048 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1049 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1050 setVerbosity (Just 2)) )
1051 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1053 ------ Machine dependant (-m<blah>) stuff ---------------------------
1055 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1056 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1057 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1059 ------ Warning opts -------------------------------------------------
1060 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1061 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
1062 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1063 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
1064 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1066 ------ Optimisation flags ------------------------------------------
1067 , ( "O" , NoArg (upd (setOptLevel 1)))
1068 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1069 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1070 -- If the number is missing, use 1
1072 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1073 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1075 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1076 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1077 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1079 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1080 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1082 ------ Compiler flags -----------------------------------------------
1084 , ( "fasm", NoArg (setObjTarget HscAsm) )
1085 , ( "fvia-c", NoArg (setObjTarget HscC) )
1086 , ( "fvia-C", NoArg (setObjTarget HscC) )
1088 , ( "fno-code", NoArg (setTarget HscNothing))
1089 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1090 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1092 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1093 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1095 -- the rest of the -f* and -fno-* flags
1096 , ( "f", PrefixPred (isFlag fFlags)
1097 (\f -> setDynFlag (getFlag fFlags f)) )
1098 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1099 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1101 -- the -X* and -XNo* flags
1102 , ( "X", PrefixPred (isFlag xFlags)
1103 (\f -> setDynFlag (getFlag xFlags f)) )
1104 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1105 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1108 -- these -f<blah> flags can all be reversed with -fno-<blah>
1111 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1112 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1113 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1114 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1115 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1116 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1117 ( "warn-missing-fields", Opt_WarnMissingFields ),
1118 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1119 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1120 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1121 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1122 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1123 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1124 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1125 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1126 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1127 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1128 ( "warn-deprecations", Opt_WarnDeprecations ),
1129 ( "warn-orphans", Opt_WarnOrphans ),
1130 ( "warn-tabs", Opt_WarnTabs ),
1131 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1132 ( "strictness", Opt_Strictness ),
1133 ( "full-laziness", Opt_FullLaziness ),
1134 ( "liberate-case", Opt_LiberateCase ),
1135 ( "spec-constr", Opt_SpecConstr ),
1137 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1138 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1139 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1140 ( "ignore-asserts", Opt_IgnoreAsserts ),
1141 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1142 ( "do-eta-reduction", Opt_DoEtaReduction ),
1143 ( "case-merge", Opt_CaseMerge ),
1144 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1145 ( "dicts-cheap", Opt_DictsCheap ),
1146 ( "excess-precision", Opt_ExcessPrecision ),
1147 ( "asm-mangling", Opt_DoAsmMangling ),
1148 ( "print-bind-result", Opt_PrintBindResult ),
1149 ( "force-recomp", Opt_ForceRecomp ),
1150 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1151 ( "rewrite-rules", Opt_RewriteRules ),
1152 ( "break-on-exception", Opt_BreakOnException ),
1153 ( "vectorise", Opt_Vectorise ),
1154 ( "regs-graph", Opt_RegsGraph),
1155 -- Deprecated in favour of -XTemplateHaskell:
1156 ( "th", Opt_TemplateHaskell ),
1157 -- Deprecated in favour of -XForeignFunctionInterface:
1158 ( "fi", Opt_ForeignFunctionInterface ),
1159 -- Deprecated in favour of -XForeignFunctionInterface:
1160 ( "ffi", Opt_ForeignFunctionInterface ),
1161 -- Deprecated in favour of -XArrows:
1162 ( "arrows", Opt_Arrows ),
1163 -- Deprecated in favour of -XGenerics:
1164 ( "generics", Opt_Generics ),
1165 -- Deprecated in favour of -XImplicitPrelude:
1166 ( "implicit-prelude", Opt_ImplicitPrelude ),
1167 -- Deprecated in favour of -XBangPatterns:
1168 ( "bang-patterns", Opt_BangPatterns ),
1169 -- Deprecated in favour of -XMonomorphismRestriction:
1170 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1171 -- Deprecated in favour of -XMonoPatBinds:
1172 ( "mono-pat-binds", Opt_MonoPatBinds ),
1173 -- Deprecated in favour of -XExtendedDefaultRules:
1174 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1175 -- Deprecated in favour of -XImplicitParams:
1176 ( "implicit-params", Opt_ImplicitParams ),
1177 -- Deprecated in favour of -XScopedTypeVariables:
1178 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1179 -- Deprecated in favour of -XPArr:
1180 ( "parr", Opt_PArr ),
1181 -- Deprecated in favour of -XOverlappingInstances:
1182 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1183 -- Deprecated in favour of -XUndecidableInstances:
1184 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1185 -- Deprecated in favour of -XIncoherentInstances:
1186 ( "allow-incoherent-instances", Opt_IncoherentInstances )
1189 supportedLanguages :: [String]
1190 supportedLanguages = map fst xFlags
1192 -- These -X<blah> flags can all be reversed with -XNo<blah>
1193 xFlags :: [(String, DynFlag)]
1196 ( "PatternGuards", Opt_PatternGuards ),
1197 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1198 ( "MagicHash", Opt_MagicHash ),
1199 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1200 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1201 ( "KindSignatures", Opt_KindSignatures ),
1202 ( "PatternSignatures", Opt_PatternSignatures ),
1203 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1204 ( "ParallelListComp", Opt_ParallelListComp ),
1205 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1206 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1207 ( "PartiallyAppliedClosedTypeSynonyms",
1208 Opt_PartiallyAppliedClosedTypeSynonyms ),
1209 ( "Rank2Types", Opt_Rank2Types ),
1210 ( "RankNTypes", Opt_RankNTypes ),
1211 ( "TypeOperators", Opt_TypeOperators ),
1212 ( "RecursiveDo", Opt_RecursiveDo ),
1213 ( "Arrows", Opt_Arrows ),
1214 ( "PArr", Opt_PArr ),
1215 ( "TemplateHaskell", Opt_TemplateHaskell ),
1216 ( "Generics", Opt_Generics ),
1218 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1219 ( "RecordWildCards", Opt_RecordWildCards ),
1220 ( "RecordPuns", Opt_RecordPuns ),
1221 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1222 ( "OverloadedStrings", Opt_OverloadedStrings ),
1223 ( "GADTs", Opt_GADTs ),
1224 ( "TypeFamilies", Opt_TypeFamilies ),
1225 ( "BangPatterns", Opt_BangPatterns ),
1227 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1228 -- On by default (which is not strictly H98):
1229 ( "MonoPatBinds", Opt_MonoPatBinds ),
1230 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1231 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1232 ( "ImplicitParams", Opt_ImplicitParams ),
1233 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1234 ( "UnboxedTuples", Opt_UnboxedTuples ),
1235 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1236 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1237 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1238 ( "FlexibleContexts", Opt_FlexibleContexts ),
1239 ( "FlexibleInstances", Opt_FlexibleInstances ),
1240 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1241 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1242 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1243 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1244 ( "OverlappingInstances", Opt_OverlappingInstances ),
1245 ( "UndecidableInstances", Opt_UndecidableInstances ),
1246 ( "IncoherentInstances", Opt_IncoherentInstances )
1249 impliedFlags :: [(DynFlag, [DynFlag])]
1251 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1254 glasgowExtsFlags = [
1255 Opt_PrintExplicitForalls
1256 , Opt_ForeignFunctionInterface
1257 , Opt_UnliftedFFITypes
1259 , Opt_ImplicitParams
1260 , Opt_ScopedTypeVariables
1262 , Opt_TypeSynonymInstances
1263 , Opt_StandaloneDeriving
1264 , Opt_DeriveDataTypeable
1265 , Opt_FlexibleContexts
1266 , Opt_FlexibleInstances
1267 , Opt_ConstrainedClassMethods
1268 , Opt_MultiParamTypeClasses
1269 , Opt_FunctionalDependencies
1271 , Opt_PolymorphicComponents
1272 , Opt_ExistentialQuantification
1275 , Opt_PartiallyAppliedClosedTypeSynonyms
1279 , Opt_ParallelListComp
1280 , Opt_EmptyDataDecls
1281 , Opt_KindSignatures
1282 , Opt_PatternSignatures
1283 , Opt_GeneralizedNewtypeDeriving
1284 , Opt_TypeFamilies ]
1287 isFlag :: [(String,a)] -> String -> Bool
1288 isFlag flags f = any (\(ff,_) -> ff == f) flags
1290 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1291 isPrefFlag pref flags no_f
1292 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1296 getFlag :: [(String,a)] -> String -> a
1297 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1299 [] -> panic ("get_flag " ++ f)
1301 getPrefFlag :: String -> [(String,a)] -> String -> a
1302 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1303 -- We should only be passed flags which match the prefix
1305 -- -----------------------------------------------------------------------------
1306 -- Parsing the dynamic flags.
1308 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1309 parseDynamicFlags dflags args = do
1310 let ((leftover,errs),dflags')
1311 = runCmdLine (processArgs dynamic_flags args) dflags
1312 when (not (null errs)) $ do
1313 throwDyn (UsageError (unlines errs))
1314 return (dflags', leftover)
1317 type DynP = CmdLineP DynFlags
1319 upd :: (DynFlags -> DynFlags) -> DynP ()
1321 dfs <- getCmdLineState
1322 putCmdLineState $! (f dfs)
1324 --------------------------
1325 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1326 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1328 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1329 -- When you set f, set the ones it implies
1330 -- When you un-set f, however, we don't un-set the things it implies
1331 -- (except for -fno-glasgow-exts, which is treated specially)
1333 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1335 --------------------------
1336 setDumpFlag :: DynFlag -> OptKind DynP
1337 setDumpFlag dump_flag
1338 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1339 -- Whenver we -ddump, switch off the recompilation checker,
1340 -- else you don't see the dump!
1342 setVerbosity :: Maybe Int -> DynP ()
1343 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1345 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1347 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1350 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1352 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1354 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1357 | Nothing <- unpackPackageId pid
1358 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1360 = \s -> s{ thisPackage = pid }
1362 pid = stringToPackageId p
1364 -- If we're linking a binary, then only targets that produce object
1365 -- code are allowed (requests for other target types are ignored).
1366 setTarget l = upd set
1369 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1372 -- Changes the target only if we're compiling object code. This is
1373 -- used by -fasm and -fvia-C, which switch from one to the other, but
1374 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1375 -- can be safely used in an OPTIONS_GHC pragma.
1376 setObjTarget l = upd set
1379 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1382 setOptLevel :: Int -> DynFlags -> DynFlags
1383 setOptLevel n dflags
1384 | hscTarget dflags == HscInterpreted && n > 0
1386 -- not in IO any more, oh well:
1387 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1389 = updOptLevel n dflags
1392 setMainIs :: String -> DynP ()
1394 | not (null main_fn) -- The arg looked like "Foo.baz"
1395 = upd $ \d -> d{ mainFunIs = Just main_fn,
1396 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1398 | isUpper (head main_mod) -- The arg looked like "Foo"
1399 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1401 | otherwise -- The arg looked like "baz"
1402 = upd $ \d -> d{ mainFunIs = Just main_mod }
1404 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1406 -----------------------------------------------------------------------------
1407 -- Paths & Libraries
1409 -- -i on its own deletes the import paths
1410 addImportPath "" = upd (\s -> s{importPaths = []})
1411 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1415 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1418 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1420 addFrameworkPath p =
1421 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1423 split_marker = ':' -- not configurable (ToDo)
1425 splitPathList :: String -> [String]
1426 splitPathList s = filter notNull (splitUp s)
1427 -- empty paths are ignored: there might be a trailing
1428 -- ':' in the initial list, for example. Empty paths can
1429 -- cause confusion when they are translated into -I options
1430 -- for passing to gcc.
1432 #ifndef mingw32_TARGET_OS
1433 splitUp xs = split split_marker xs
1435 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1437 -- That is, if "foo:bar:baz" is used, this interpreted as
1438 -- consisting of three entries, 'foo', 'bar', 'baz'.
1439 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1440 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1442 -- Notice that no attempt is made to fully replace the 'standard'
1443 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1444 -- that this will cause too much breakage for users & ':' will
1445 -- work fine even with DOS paths, if you're not insisting on being silly.
1448 splitUp (x:':':div:xs) | div `elem` dir_markers
1449 = ((x:':':div:p): splitUp rs)
1451 (p,rs) = findNextPath xs
1452 -- we used to check for existence of the path here, but that
1453 -- required the IO monad to be threaded through the command-line
1454 -- parser which is quite inconvenient. The
1455 splitUp xs = cons p (splitUp rs)
1457 (p,rs) = findNextPath xs
1462 -- will be called either when we've consumed nought or the
1463 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1464 -- finding the next split marker.
1466 case break (`elem` split_markers) xs of
1467 (p, d:ds) -> (p, ds)
1470 split_markers :: [Char]
1471 split_markers = [':', ';']
1473 dir_markers :: [Char]
1474 dir_markers = ['/', '\\']
1477 -- -----------------------------------------------------------------------------
1478 -- tmpDir, where we store temporary files.
1480 setTmpDir :: FilePath -> DynFlags -> DynFlags
1481 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1483 #if !defined(mingw32_HOST_OS)
1484 canonicalise p = normalisePath p
1486 -- Canonicalisation of temp path under win32 is a bit more
1487 -- involved: (a) strip trailing slash,
1488 -- (b) normalise slashes
1489 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1491 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1493 -- if we're operating under cygwin, and TMP/TEMP is of
1494 -- the form "/cygdrive/drive/path", translate this to
1495 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1496 -- understand /cygdrive paths.)
1498 | "/cygdrive/" `isPrefixOf` path =
1499 case drop (length "/cygdrive/") path of
1500 drive:xs@('/':_) -> drive:':':xs
1504 -- strip the trailing backslash (awful, but we only do this once).
1505 removeTrailingSlash path =
1512 -----------------------------------------------------------------------------
1515 setOptHpcDir :: String -> DynP ()
1516 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1518 -----------------------------------------------------------------------------
1519 -- Via-C compilation stuff
1521 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1522 [String]) -- for registerised HC compilations
1523 machdepCCOpts dflags
1524 #if alpha_TARGET_ARCH
1526 #ifdef HAVE_THREADED_RTS_SUPPORT
1530 -- For now, to suppress the gcc warning "call-clobbered
1531 -- register used for global register variable", we simply
1532 -- disable all warnings altogether using the -w flag. Oh well.
1534 #elif hppa_TARGET_ARCH
1535 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1536 -- (very nice, but too bad the HP /usr/include files don't agree.)
1537 = ( ["-D_HPUX_SOURCE"], [] )
1539 #elif m68k_TARGET_ARCH
1540 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1541 -- popping of args to routines to be explicit; if we let things
1542 -- be deferred 'til after an STGJUMP, imminent death is certain!
1544 -- -fomit-frame-pointer : *don't*
1545 -- It's better to have a6 completely tied up being a frame pointer
1546 -- rather than let GCC pick random things to do with it.
1547 -- (If we want to steal a6, then we would try to do things
1548 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1549 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1551 #elif i386_TARGET_ARCH
1552 -- -fno-defer-pop : basically the same game as for m68k
1554 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1555 -- the fp (%ebp) for our register maps.
1556 = let n_regs = stolen_x86_regs dflags
1559 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1560 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1563 #ifdef HAVE_GCC_MNO_OMIT_LFPTR
1564 -- Some gccs are configured with
1565 -- -momit-leaf-frame-pointer on by default, and it
1566 -- apparently takes precedence over
1567 -- -fomit-frame-pointer, so we disable it first here.
1568 "-mno-omit-leaf-frame-pointer",
1570 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1571 "-fno-unit-at-a-time",
1572 -- unit-at-a-time doesn't do us any good, and screws
1573 -- up -split-objs by moving the split markers around.
1574 -- It's only turned on with -O2, but put it here just
1575 -- in case someone uses -optc-O2.
1577 "-fomit-frame-pointer",
1578 -- we want -fno-builtin, because when gcc inlines
1579 -- built-in functions like memcpy() it tends to
1580 -- run out of registers, requiring -monly-n-regs
1582 "-DSTOLEN_X86_REGS="++show n_regs ]
1585 #elif ia64_TARGET_ARCH
1586 = ( [], ["-fomit-frame-pointer", "-G0"] )
1588 #elif x86_64_TARGET_ARCH
1589 = ( [], ["-fomit-frame-pointer",
1590 "-fno-asynchronous-unwind-tables",
1591 -- the unwind tables are unnecessary for HC code,
1592 -- and get in the way of -split-objs. Another option
1593 -- would be to throw them away in the mangler, but this
1595 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1596 "-fno-unit-at-a-time",
1597 -- unit-at-a-time doesn't do us any good, and screws
1598 -- up -split-objs by moving the split markers around.
1599 -- It's only turned on with -O2, but put it here just
1600 -- in case someone uses -optc-O2.
1603 -- calling builtins like strlen() using the FFI can
1604 -- cause gcc to run out of regs, so use the external
1608 #elif sparc_TARGET_ARCH
1610 -- For now, to suppress the gcc warning "call-clobbered
1611 -- register used for global register variable", we simply
1612 -- disable all warnings altogether using the -w flag. Oh well.
1614 #elif powerpc_apple_darwin_TARGET
1616 -- Disable Apple's precompiling preprocessor. It's a great thing
1617 -- for "normal" programs, but it doesn't support register variable
1619 = ( [], ["-no-cpp-precomp"] )
1624 picCCOpts :: DynFlags -> [String]
1626 #if darwin_TARGET_OS
1627 -- Apple prefers to do things the other way round.
1628 -- PIC is on by default.
1629 -- -mdynamic-no-pic:
1630 -- Turn off PIC code generation.
1632 -- Don't generate "common" symbols - these are unwanted
1633 -- in dynamic libraries.
1638 = ["-mdynamic-no-pic"]
1639 #elif mingw32_TARGET_OS
1640 -- no -fPIC for Windows
1649 -- -----------------------------------------------------------------------------
1653 can_split = cSplitObjs == "YES"
1655 -- -----------------------------------------------------------------------------
1658 compilerInfo :: [(String, String)]
1659 compilerInfo = [("Project name", cProjectName),
1660 ("Project version", cProjectVersion),
1661 ("Booter version", cBooterVersion),
1663 ("Interface file version", cHscIfaceFileVersion),
1664 ("Object splitting", cSplitObjs),
1665 ("Have native code generator", cGhcWithNativeCodeGen),
1666 ("Unregisterised", cGhcUnregisterised),
1667 ("Tables next to code", cGhcEnableTablesNextToCode),
1668 ("Win32 DLLs", cEnableWin32DLLs),
1669 ("Leading underscore", cLeadingUnderscore)]