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
328 -- commands for particular phases
330 pgm_P :: (String,[Option]),
332 pgm_c :: (String,[Option]),
333 pgm_m :: (String,[Option]),
334 pgm_s :: (String,[Option]),
335 pgm_a :: (String,[Option]),
336 pgm_l :: (String,[Option]),
337 pgm_dll :: (String,[Option]),
339 pgm_sysman :: String,
342 extraPkgConfs :: [FilePath],
343 topDir :: FilePath, -- filled in by SysTools
344 systemPackageConfig :: FilePath, -- ditto
345 -- The -package-conf flags given on the command line, in the order
348 packageFlags :: [PackageFlag],
349 -- The -package and -hide-package flags from the command-line
352 -- NB. do not modify this field, it is calculated by
353 -- Packages.initPackages and Packages.updatePackages.
354 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
355 pkgState :: PackageState,
361 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
372 -- | will this target result in an object file on the disk?
373 isObjectTarget :: HscTarget -> Bool
374 isObjectTarget HscC = True
375 isObjectTarget HscAsm = True
376 isObjectTarget _ = False
378 -- | The 'GhcMode' tells us whether we're doing multi-module
379 -- compilation (controlled via the "GHC" API) or one-shot
380 -- (single-module) compilation. This makes a difference primarily to
381 -- the "Finder": in one-shot mode we look for interface files for
382 -- imported modules, but in multi-module mode we look for source files
383 -- in order to check whether they need to be recompiled.
385 = CompManager -- ^ --make, GHCi, etc.
386 | OneShot -- ^ ghc -c Foo.hs
387 | MkDepend -- ^ ghc -M, see Finder for why we need this
390 isOneShot :: GhcMode -> Bool
391 isOneShot OneShot = True
392 isOneShot _other = False
394 -- | What kind of linking to do.
395 data GhcLink -- What to do in the link step, if there is one
396 = NoLink -- Don't link at all
397 | LinkBinary -- Link object code into a binary
398 | LinkInMemory -- Use the in-memory dynamic linker
399 | LinkDynLib -- Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
402 isNoLink :: GhcLink -> Bool
403 isNoLink NoLink = True
404 isNoLink other = False
407 = ExposePackage String
409 | IgnorePackage String
412 defaultHscTarget = defaultObjectTarget
414 -- | the 'HscTarget' value corresponding to the default way to create
415 -- object files on the current platform.
417 | cGhcWithNativeCodeGen == "YES" = HscAsm
420 initDynFlags dflags = do
421 -- someday these will be dynamic flags
422 ways <- readIORef v_Ways
423 build_tag <- readIORef v_Build_tag
424 rts_build_tag <- readIORef v_RTS_Build_tag
427 buildTag = build_tag,
428 rtsBuildTag = rts_build_tag
433 ghcMode = CompManager,
434 ghcLink = LinkBinary,
437 hscTarget = defaultHscTarget,
442 maxSimplIterations = 4,
446 cmdlineHcIncludes = [],
450 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
452 thisPackage = mainPackageId,
458 objectSuf = phaseInputExt StopLn,
459 hcSuf = phaseInputExt HCc,
462 outputFile = Nothing,
467 cmdlineFrameworks = [],
468 tmpDir = cDEFAULT_TMPDIR,
483 pkgDatabase = Nothing,
484 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
486 Opt_ReadUserPackageConf,
488 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
489 -- behaviour the default, to see if anyone notices
493 Opt_MonomorphismRestriction,
498 Opt_PrintBindResult ]
499 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
500 -- The default -O0 options
503 log_action = \severity srcSpan style msg ->
505 SevInfo -> hPutStrLn stderr (show (msg style))
506 SevFatal -> hPutStrLn stderr (show (msg style))
507 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
513 0 | print errors & warnings only
514 1 | minimal verbosity: print "compiling M ... done." for each module.
515 2 | equivalent to -dshow-passes
516 3 | equivalent to existing "ghc -v"
517 4 | "ghc -v -ddump-most"
518 5 | "ghc -v -ddump-all"
521 dopt :: DynFlag -> DynFlags -> Bool
522 dopt f dflags = f `elem` (flags dflags)
524 dopt_set :: DynFlags -> DynFlag -> DynFlags
525 dopt_set dfs f = dfs{ flags = f : flags dfs }
527 dopt_unset :: DynFlags -> DynFlag -> DynFlags
528 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
530 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
531 getOpts dflags opts = reverse (opts dflags)
532 -- We add to the options from the front, so we need to reverse the list
534 getVerbFlag :: DynFlags -> String
536 | verbosity dflags >= 3 = "-v"
539 setObjectDir f d = d{ objectDir = f}
540 setHiDir f d = d{ hiDir = f}
541 setStubDir f d = d{ stubDir = f}
543 setObjectSuf f d = d{ objectSuf = f}
544 setHiSuf f d = d{ hiSuf = f}
545 setHcSuf f d = d{ hcSuf = f}
547 setOutputFile f d = d{ outputFile = f}
548 setOutputHi f d = d{ outputHi = f}
550 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
551 -- Config.hs should really use Option.
552 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
554 setPgmL f d = d{ pgm_L = f}
555 setPgmF f d = d{ pgm_F = f}
556 setPgmc f d = d{ pgm_c = (f,[])}
557 setPgmm f d = d{ pgm_m = (f,[])}
558 setPgms f d = d{ pgm_s = (f,[])}
559 setPgma f d = d{ pgm_a = (f,[])}
560 setPgml f d = d{ pgm_l = (f,[])}
561 setPgmdll f d = d{ pgm_dll = (f,[])}
563 addOptL f d = d{ opt_L = f : opt_L d}
564 addOptP f d = d{ opt_P = f : opt_P d}
565 addOptF f d = d{ opt_F = f : opt_F d}
566 addOptc f d = d{ opt_c = f : opt_c d}
567 addOptm f d = d{ opt_m = f : opt_m d}
568 addOpta f d = d{ opt_a = f : opt_a d}
569 addOptl f d = d{ opt_l = f : opt_l d}
570 addOptdep f d = d{ opt_dep = f : opt_dep d}
572 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
574 -- -----------------------------------------------------------------------------
575 -- Command-line options
577 -- When invoking external tools as part of the compilation pipeline, we
578 -- pass these a sequence of options on the command-line. Rather than
579 -- just using a list of Strings, we use a type that allows us to distinguish
580 -- between filepaths and 'other stuff'. [The reason being, of course, that
581 -- this type gives us a handle on transforming filenames, and filenames only,
582 -- to whatever format they're expected to be on a particular platform.]
585 = FileOption -- an entry that _contains_ filename(s) / filepaths.
586 String -- a non-filepath prefix that shouldn't be
587 -- transformed (e.g., "/out=")
588 String -- the filepath/filename portion
591 -----------------------------------------------------------------------------
592 -- Setting the optimisation level
594 updOptLevel :: Int -> DynFlags -> DynFlags
595 -- Set dynflags appropriate to the optimisation level
597 = dfs2{ optLevel = final_n }
599 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
600 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
601 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
603 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
604 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
606 optLevelFlags :: [([Int], DynFlag)]
608 = [ ([0], Opt_IgnoreInterfacePragmas)
609 , ([0], Opt_OmitInterfacePragmas)
611 , ([1,2], Opt_IgnoreAsserts)
612 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
614 , ([1,2], Opt_DoEtaReduction)
615 , ([1,2], Opt_CaseMerge)
616 , ([1,2], Opt_Strictness)
618 , ([1,2], Opt_FullLaziness)
620 , ([2], Opt_LiberateCase)
621 , ([2], Opt_SpecConstr)
623 , ([0,1,2], Opt_DoLambdaEtaExpansion)
624 -- This one is important for a tiresome reason:
625 -- we want to make sure that the bindings for data
626 -- constructors are eta-expanded. This is probably
627 -- a good thing anyway, but it seems fragile.
630 -- -----------------------------------------------------------------------------
631 -- Standard sets of warning options
634 = [ Opt_WarnDeprecations,
635 Opt_WarnOverlappingPatterns,
636 Opt_WarnMissingFields,
637 Opt_WarnMissingMethods,
638 Opt_WarnDuplicateExports
642 = standardWarnings ++
643 [ Opt_WarnUnusedBinds,
644 Opt_WarnUnusedMatches,
645 Opt_WarnUnusedImports,
646 Opt_WarnIncompletePatterns,
652 [ Opt_WarnTypeDefaults,
653 Opt_WarnNameShadowing,
659 -- minuswRemovesOpts should be every warning option
662 [Opt_WarnImplicitPrelude,
663 Opt_WarnIncompletePatternsRecUpd,
664 Opt_WarnSimplePatterns,
665 Opt_WarnMonomorphism,
669 -- -----------------------------------------------------------------------------
670 -- CoreToDo: abstraction of core-to-core passes to run.
672 data CoreToDo -- These are diff core-to-core passes,
673 -- which may be invoked in any order,
674 -- as many times as you like.
676 = CoreDoSimplify -- The core-to-core simplifier.
679 -- Each run of the simplifier can take a different
680 -- set of simplifier-specific flags.
682 | CoreDoFloatOutwards FloatOutSwitches
687 | CoreDoWorkerWrapper
690 | CoreDoOldStrictness
693 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
694 -- matching this string
695 | CoreDoVectorisation
696 | CoreDoNothing -- Useful when building up
697 | CoreDoPasses [CoreToDo] -- lists of these things
699 data SimplifierMode -- See comments in SimplMonad
703 data SimplifierSwitch
704 = MaxSimplifierIterations Int
707 data FloatOutSwitches
708 = FloatOutSw Bool -- True <=> float lambdas to top level
709 Bool -- True <=> float constants to top level,
710 -- even if they do not escape a lambda
713 -- The core-to-core pass ordering is derived from the DynFlags:
714 runWhen :: Bool -> CoreToDo -> CoreToDo
715 runWhen True do_this = do_this
716 runWhen False do_this = CoreDoNothing
718 getCoreToDo :: DynFlags -> [CoreToDo]
720 | Just todo <- coreToDo dflags = todo -- set explicitly by user
721 | otherwise = core_todo
723 opt_level = optLevel dflags
724 max_iter = maxSimplIterations dflags
725 strictness = dopt Opt_Strictness dflags
726 full_laziness = dopt Opt_FullLaziness dflags
727 cse = dopt Opt_CSE dflags
728 spec_constr = dopt Opt_SpecConstr dflags
729 liberate_case = dopt Opt_LiberateCase dflags
730 rule_check = ruleCheck dflags
731 vectorisation = dopt Opt_Vectorise dflags
734 if opt_level == 0 then
736 CoreDoSimplify (SimplPhase 0) [
737 MaxSimplifierIterations max_iter
740 else {- opt_level >= 1 -} [
742 -- initial simplify: mk specialiser happy: minimum effort please
743 CoreDoSimplify SimplGently [
745 -- Don't inline anything till full laziness has bitten
746 -- In particular, inlining wrappers inhibits floating
747 -- e.g. ...(case f x of ...)...
748 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
749 -- ==> ...(case x of I# x# -> case fw x# of ...)...
750 -- and now the redex (f x) isn't floatable any more
751 -- Similarly, don't apply any rules until after full
752 -- laziness. Notably, list fusion can prevent floating.
754 NoCaseOfCase, -- Don't do case-of-case transformations.
755 -- This makes full laziness work better
756 MaxSimplifierIterations max_iter
760 -- We run vectorisation here for now, but we might also try to run
762 runWhen vectorisation (CoreDoPasses [
764 CoreDoSimplify SimplGently
766 MaxSimplifierIterations max_iter]]),
768 -- Specialisation is best done before full laziness
769 -- so that overloaded functions have all their dictionary lambdas manifest
772 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
776 CoreDoSimplify (SimplPhase 2) [
777 -- Want to run with inline phase 2 after the specialiser to give
778 -- maximum chance for fusion to work before we inline build/augment
779 -- in phase 1. This made a difference in 'ansi' where an
780 -- overloaded function wasn't inlined till too late.
781 MaxSimplifierIterations max_iter
783 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
785 CoreDoSimplify (SimplPhase 1) [
786 -- Need inline-phase2 here so that build/augment get
787 -- inlined. I found that spectral/hartel/genfft lost some useful
788 -- strictness in the function sumcode' if augment is not inlined
789 -- before strictness analysis runs
790 MaxSimplifierIterations max_iter
792 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
794 CoreDoSimplify (SimplPhase 0) [
795 -- Phase 0: allow all Ids to be inlined now
796 -- This gets foldr inlined before strictness analysis
798 MaxSimplifierIterations 3
799 -- At least 3 iterations because otherwise we land up with
800 -- huge dead expressions because of an infelicity in the
802 -- let k = BIG in foldr k z xs
803 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
804 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
808 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
810 #ifdef OLD_STRICTNESS
813 runWhen strictness (CoreDoPasses [
817 CoreDoSimplify (SimplPhase 0) [
818 MaxSimplifierIterations max_iter
821 runWhen full_laziness
822 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
823 True)), -- Float constants
824 -- nofib/spectral/hartel/wang doubles in speed if you
825 -- do full laziness late in the day. It only happens
826 -- after fusion and other stuff, so the early pass doesn't
827 -- catch it. For the record, the redex is
828 -- f_el22 (f_el21 r_midblock)
832 -- We want CSE to follow the final full-laziness pass, because it may
833 -- succeed in commoning up things floated out by full laziness.
834 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
838 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
840 -- Case-liberation for -O2. This should be after
841 -- strictness analysis and the simplification which follows it.
842 runWhen liberate_case (CoreDoPasses [
844 CoreDoSimplify (SimplPhase 0) [
845 MaxSimplifierIterations max_iter
846 ] ]), -- Run the simplifier after LiberateCase to vastly
847 -- reduce the possiblility of shadowing
848 -- Reason: see Note [Shadowing] in SpecConstr.lhs
850 runWhen spec_constr CoreDoSpecConstr,
852 -- Final clean-up simplification:
853 CoreDoSimplify (SimplPhase 0) [
854 MaxSimplifierIterations max_iter
858 -- -----------------------------------------------------------------------------
859 -- StgToDo: abstraction of stg-to-stg passes to run.
862 = StgDoMassageForProfiling -- should be (next to) last
863 -- There's also setStgVarInfo, but its absolute "lastness"
864 -- is so critical that it is hardwired in (no flag).
867 getStgToDo :: DynFlags -> [StgToDo]
869 | Just todo <- stgToDo dflags = todo -- set explicitly by user
872 stg_stats = dopt Opt_StgStats dflags
874 todo1 = if stg_stats then [D_stg_stats] else []
876 todo2 | WayProf `elem` wayNames dflags
877 = StgDoMassageForProfiling : todo1
881 -- -----------------------------------------------------------------------------
885 allFlags = map ('-':) $
886 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
887 map ("fno-"++) flags ++
889 where ok (PrefixPred _ _) = False
891 flags = map fst fFlags
893 dynamic_flags :: [(String, OptKind DynP)]
895 ( "n" , NoArg (setDynFlag Opt_DryRun) )
896 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
897 , ( "F" , NoArg (setDynFlag Opt_Pp))
898 , ( "#include" , HasArg (addCmdlineHCInclude) )
899 , ( "v" , OptIntSuffix setVerbosity )
901 ------- Specific phases --------------------------------------------
902 , ( "pgmL" , HasArg (upd . setPgmL) )
903 , ( "pgmP" , HasArg (upd . setPgmP) )
904 , ( "pgmF" , HasArg (upd . setPgmF) )
905 , ( "pgmc" , HasArg (upd . setPgmc) )
906 , ( "pgmm" , HasArg (upd . setPgmm) )
907 , ( "pgms" , HasArg (upd . setPgms) )
908 , ( "pgma" , HasArg (upd . setPgma) )
909 , ( "pgml" , HasArg (upd . setPgml) )
910 , ( "pgmdll" , HasArg (upd . setPgmdll) )
912 , ( "optL" , HasArg (upd . addOptL) )
913 , ( "optP" , HasArg (upd . addOptP) )
914 , ( "optF" , HasArg (upd . addOptF) )
915 , ( "optc" , HasArg (upd . addOptc) )
916 , ( "optm" , HasArg (upd . addOptm) )
917 , ( "opta" , HasArg (upd . addOpta) )
918 , ( "optl" , HasArg (upd . addOptl) )
919 , ( "optdep" , HasArg (upd . addOptdep) )
921 , ( "split-objs" , NoArg (if can_split
922 then setDynFlag Opt_SplitObjs
925 -------- Linking ----------------------------------------------------
926 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
927 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
928 , ( "shared" , NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
930 ------- Libraries ---------------------------------------------------
931 , ( "L" , Prefix addLibraryPath )
932 , ( "l" , AnySuffix (\s -> do upd (addOptl s)))
934 ------- Frameworks --------------------------------------------------
935 -- -framework-path should really be -F ...
936 , ( "framework-path" , HasArg addFrameworkPath )
937 , ( "framework" , HasArg (upd . addCmdlineFramework) )
939 ------- Output Redirection ------------------------------------------
940 , ( "odir" , HasArg (upd . setObjectDir . Just))
941 , ( "o" , SepArg (upd . setOutputFile . Just))
942 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
943 , ( "osuf" , HasArg (upd . setObjectSuf))
944 , ( "hcsuf" , HasArg (upd . setHcSuf))
945 , ( "hisuf" , HasArg (upd . setHiSuf))
946 , ( "hidir" , HasArg (upd . setHiDir . Just))
947 , ( "tmpdir" , HasArg (upd . setTmpDir))
948 , ( "stubdir" , HasArg (upd . setStubDir . Just))
950 ------- Keeping temporary files -------------------------------------
951 -- These can be singular (think ghc -c) or plural (think ghc --make)
952 , ( "keep-hc-file" , NoArg (setDynFlag Opt_KeepHcFiles))
953 , ( "keep-hc-files" , NoArg (setDynFlag Opt_KeepHcFiles))
954 , ( "keep-s-file" , NoArg (setDynFlag Opt_KeepSFiles))
955 , ( "keep-s-files" , NoArg (setDynFlag Opt_KeepSFiles))
956 , ( "keep-raw-s-file" , NoArg (setDynFlag Opt_KeepRawSFiles))
957 , ( "keep-raw-s-files", NoArg (setDynFlag Opt_KeepRawSFiles))
958 -- This only makes sense as plural
959 , ( "keep-tmp-files" , NoArg (setDynFlag Opt_KeepTmpFiles))
961 ------- Miscellaneous ----------------------------------------------
962 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
963 , ( "main-is" , SepArg setMainIs )
964 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
965 , ( "hpcdir" , SepArg setOptHpcDir )
967 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
968 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
969 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
971 ------- Packages ----------------------------------------------------
972 , ( "package-conf" , HasArg extraPkgConf_ )
973 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
974 , ( "package-name" , HasArg (upd . setPackageName) )
975 , ( "package" , HasArg exposePackage )
976 , ( "hide-package" , HasArg hidePackage )
977 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
978 , ( "ignore-package" , HasArg ignorePackage )
979 , ( "syslib" , HasArg exposePackage ) -- for compatibility
981 ------ HsCpp opts ---------------------------------------------------
982 , ( "D", AnySuffix (upd . addOptP) )
983 , ( "U", AnySuffix (upd . addOptP) )
985 ------- Include/Import Paths ----------------------------------------
986 , ( "I" , Prefix addIncludePath)
987 , ( "i" , OptPrefix addImportPath )
989 ------ Debugging ----------------------------------------------------
990 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
992 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
993 , ( "ddump-cps-cmm", setDumpFlag Opt_D_dump_cps_cmm)
994 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
995 , ( "ddump-asm-native", setDumpFlag Opt_D_dump_asm_native)
996 , ( "ddump-asm-liveness", setDumpFlag Opt_D_dump_asm_liveness)
997 , ( "ddump-asm-coalesce", setDumpFlag Opt_D_dump_asm_coalesce)
998 , ( "ddump-asm-regalloc", setDumpFlag Opt_D_dump_asm_regalloc)
999 , ( "ddump-asm-conflicts", setDumpFlag Opt_D_dump_asm_conflicts)
1000 , ( "ddump-asm-regalloc-stages",
1001 setDumpFlag Opt_D_dump_asm_regalloc_stages)
1002 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
1003 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
1004 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
1005 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
1006 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
1007 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
1008 , ( "ddump-rule-firings", setDumpFlag Opt_D_dump_rule_firings)
1009 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
1010 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
1011 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
1012 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
1013 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
1014 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
1015 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
1016 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
1017 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
1018 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
1019 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
1020 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
1021 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
1022 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
1023 , ( "ddump-rn-trace", setDumpFlag Opt_D_dump_rn_trace)
1024 , ( "ddump-if-trace", setDumpFlag Opt_D_dump_if_trace)
1025 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
1026 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
1027 , ( "ddump-rn-stats", setDumpFlag Opt_D_dump_rn_stats)
1028 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
1029 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
1030 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
1031 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
1032 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
1033 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
1034 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
1035 , ( "ddump-minimal-imports", setDumpFlag Opt_D_dump_minimal_imports)
1036 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
1037 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
1038 , ( "ddump-mod-cycles", setDumpFlag Opt_D_dump_mod_cycles)
1040 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
1041 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
1042 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
1043 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
1044 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
1045 setVerbosity (Just 2)) )
1046 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
1048 ------ Machine dependant (-m<blah>) stuff ---------------------------
1050 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1051 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1052 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1054 ------ Warning opts -------------------------------------------------
1055 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
1056 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
1057 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
1058 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
1059 , ( "w" , NoArg (mapM_ unSetDynFlag minuswRemovesOpts) )
1061 ------ Optimisation flags ------------------------------------------
1062 , ( "O" , NoArg (upd (setOptLevel 1)))
1063 , ( "Onot" , NoArg (upd (setOptLevel 0))) -- deprecated
1064 , ( "O" , OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1065 -- If the number is missing, use 1
1067 , ( "fmax-simplifier-iterations", IntSuffix (\n ->
1068 upd (\dfs -> dfs{ maxSimplIterations = n })) )
1070 -- liberate-case-threshold is an old flag for '-fspec-threshold'
1071 , ( "fspec-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1072 , ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
1074 , ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1075 , ( "fcontext-stack" , IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1077 ------ Compiler flags -----------------------------------------------
1079 , ( "fasm", NoArg (setObjTarget HscAsm) )
1080 , ( "fvia-c", NoArg (setObjTarget HscC) )
1081 , ( "fvia-C", NoArg (setObjTarget HscC) )
1083 , ( "fno-code", NoArg (setTarget HscNothing))
1084 , ( "fbyte-code", NoArg (setTarget HscInterpreted) )
1085 , ( "fobject-code", NoArg (setTarget defaultHscTarget) )
1087 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
1088 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
1090 -- the rest of the -f* and -fno-* flags
1091 , ( "f", PrefixPred (isFlag fFlags)
1092 (\f -> setDynFlag (getFlag fFlags f)) )
1093 , ( "f", PrefixPred (isPrefFlag "no-" fFlags)
1094 (\f -> unSetDynFlag (getPrefFlag "no-" fFlags f)) )
1096 -- the -X* and -XNo* flags
1097 , ( "X", PrefixPred (isFlag xFlags)
1098 (\f -> setDynFlag (getFlag xFlags f)) )
1099 , ( "X", PrefixPred (isPrefFlag "No" xFlags)
1100 (\f -> unSetDynFlag (getPrefFlag "No" xFlags f)) )
1103 -- these -f<blah> flags can all be reversed with -fno-<blah>
1106 ( "warn-dodgy-imports", Opt_WarnDodgyImports ),
1107 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1108 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1109 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude ),
1110 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1111 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1112 ( "warn-missing-fields", Opt_WarnMissingFields ),
1113 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1114 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1115 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1116 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1117 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1118 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1119 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism ),
1120 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1121 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1122 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1123 ( "warn-deprecations", Opt_WarnDeprecations ),
1124 ( "warn-orphans", Opt_WarnOrphans ),
1125 ( "warn-tabs", Opt_WarnTabs ),
1126 ( "print-explicit-foralls", Opt_PrintExplicitForalls ),
1127 ( "strictness", Opt_Strictness ),
1128 ( "full-laziness", Opt_FullLaziness ),
1129 ( "liberate-case", Opt_LiberateCase ),
1130 ( "spec-constr", Opt_SpecConstr ),
1132 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1133 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1134 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1135 ( "ignore-asserts", Opt_IgnoreAsserts ),
1136 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1137 ( "do-eta-reduction", Opt_DoEtaReduction ),
1138 ( "case-merge", Opt_CaseMerge ),
1139 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1140 ( "dicts-cheap", Opt_DictsCheap ),
1141 ( "excess-precision", Opt_ExcessPrecision ),
1142 ( "asm-mangling", Opt_DoAsmMangling ),
1143 ( "print-bind-result", Opt_PrintBindResult ),
1144 ( "force-recomp", Opt_ForceRecomp ),
1145 ( "hpc-no-auto", Opt_Hpc_No_Auto ),
1146 ( "rewrite-rules", Opt_RewriteRules ),
1147 ( "break-on-exception", Opt_BreakOnException ),
1148 ( "vectorise", Opt_Vectorise ),
1149 ( "regs-graph", Opt_RegsGraph),
1150 -- Deprecated in favour of -XTemplateHaskell:
1151 ( "th", Opt_TemplateHaskell ),
1152 -- Deprecated in favour of -XForeignFunctionInterface:
1153 ( "fi", Opt_ForeignFunctionInterface ),
1154 -- Deprecated in favour of -XForeignFunctionInterface:
1155 ( "ffi", Opt_ForeignFunctionInterface ),
1156 -- Deprecated in favour of -XArrows:
1157 ( "arrows", Opt_Arrows ),
1158 -- Deprecated in favour of -XGenerics:
1159 ( "generics", Opt_Generics ),
1160 -- Deprecated in favour of -XImplicitPrelude:
1161 ( "implicit-prelude", Opt_ImplicitPrelude ),
1162 -- Deprecated in favour of -XBangPatterns:
1163 ( "bang-patterns", Opt_BangPatterns ),
1164 -- Deprecated in favour of -XMonomorphismRestriction:
1165 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1166 -- Deprecated in favour of -XMonoPatBinds:
1167 ( "mono-pat-binds", Opt_MonoPatBinds ),
1168 -- Deprecated in favour of -XExtendedDefaultRules:
1169 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1170 -- Deprecated in favour of -XImplicitParams:
1171 ( "implicit-params", Opt_ImplicitParams ),
1172 -- Deprecated in favour of -XScopedTypeVariables:
1173 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1174 -- Deprecated in favour of -XPArr:
1175 ( "parr", Opt_PArr ),
1176 -- Deprecated in favour of -XOverlappingInstances:
1177 ( "allow-overlapping-instances", Opt_OverlappingInstances ),
1178 -- Deprecated in favour of -XUndecidableInstances:
1179 ( "allow-undecidable-instances", Opt_UndecidableInstances ),
1180 -- Deprecated in favour of -XIncoherentInstances:
1181 ( "allow-incoherent-instances", Opt_IncoherentInstances )
1184 supportedLanguages :: [String]
1185 supportedLanguages = map fst xFlags
1187 -- These -X<blah> flags can all be reversed with -XNo<blah>
1188 xFlags :: [(String, DynFlag)]
1191 ( "PatternGuards", Opt_PatternGuards ),
1192 ( "UnicodeSyntax", Opt_UnicodeSyntax ),
1193 ( "MagicHash", Opt_MagicHash ),
1194 ( "PolymorphicComponents", Opt_PolymorphicComponents ),
1195 ( "ExistentialQuantification", Opt_ExistentialQuantification ),
1196 ( "KindSignatures", Opt_KindSignatures ),
1197 ( "PatternSignatures", Opt_PatternSignatures ),
1198 ( "EmptyDataDecls", Opt_EmptyDataDecls ),
1199 ( "ParallelListComp", Opt_ParallelListComp ),
1200 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface ),
1201 ( "UnliftedFFITypes", Opt_UnliftedFFITypes ),
1202 ( "PartiallyAppliedClosedTypeSynonyms",
1203 Opt_PartiallyAppliedClosedTypeSynonyms ),
1204 ( "Rank2Types", Opt_Rank2Types ),
1205 ( "RankNTypes", Opt_RankNTypes ),
1206 ( "TypeOperators", Opt_TypeOperators ),
1207 ( "RecursiveDo", Opt_RecursiveDo ),
1208 ( "Arrows", Opt_Arrows ),
1209 ( "PArr", Opt_PArr ),
1210 ( "TemplateHaskell", Opt_TemplateHaskell ),
1211 ( "Generics", Opt_Generics ),
1213 ( "ImplicitPrelude", Opt_ImplicitPrelude ),
1214 ( "RecordWildCards", Opt_RecordWildCards ),
1215 ( "RecordPuns", Opt_RecordPuns ),
1216 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields ),
1217 ( "OverloadedStrings", Opt_OverloadedStrings ),
1218 ( "GADTs", Opt_GADTs ),
1219 ( "TypeFamilies", Opt_TypeFamilies ),
1220 ( "BangPatterns", Opt_BangPatterns ),
1222 ( "MonomorphismRestriction", Opt_MonomorphismRestriction ),
1223 -- On by default (which is not strictly H98):
1224 ( "MonoPatBinds", Opt_MonoPatBinds ),
1225 ( "RelaxedPolyRec", Opt_RelaxedPolyRec),
1226 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules ),
1227 ( "ImplicitParams", Opt_ImplicitParams ),
1228 ( "ScopedTypeVariables", Opt_ScopedTypeVariables ),
1229 ( "UnboxedTuples", Opt_UnboxedTuples ),
1230 ( "StandaloneDeriving", Opt_StandaloneDeriving ),
1231 ( "DeriveDataTypeable", Opt_DeriveDataTypeable ),
1232 ( "TypeSynonymInstances", Opt_TypeSynonymInstances ),
1233 ( "FlexibleContexts", Opt_FlexibleContexts ),
1234 ( "FlexibleInstances", Opt_FlexibleInstances ),
1235 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods ),
1236 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses ),
1237 ( "FunctionalDependencies", Opt_FunctionalDependencies ),
1238 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving ),
1239 ( "OverlappingInstances", Opt_OverlappingInstances ),
1240 ( "UndecidableInstances", Opt_UndecidableInstances ),
1241 ( "IncoherentInstances", Opt_IncoherentInstances )
1244 impliedFlags :: [(DynFlag, [DynFlag])]
1246 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to be completely rigid for GADTs
1249 glasgowExtsFlags = [
1250 Opt_PrintExplicitForalls
1251 , Opt_ForeignFunctionInterface
1252 , Opt_UnliftedFFITypes
1254 , Opt_ImplicitParams
1255 , Opt_ScopedTypeVariables
1257 , Opt_TypeSynonymInstances
1258 , Opt_StandaloneDeriving
1259 , Opt_DeriveDataTypeable
1260 , Opt_FlexibleContexts
1261 , Opt_FlexibleInstances
1262 , Opt_ConstrainedClassMethods
1263 , Opt_MultiParamTypeClasses
1264 , Opt_FunctionalDependencies
1266 , Opt_PolymorphicComponents
1267 , Opt_ExistentialQuantification
1270 , Opt_PartiallyAppliedClosedTypeSynonyms
1274 , Opt_ParallelListComp
1275 , Opt_EmptyDataDecls
1276 , Opt_KindSignatures
1277 , Opt_PatternSignatures
1278 , Opt_GeneralizedNewtypeDeriving
1279 , Opt_TypeFamilies ]
1282 isFlag :: [(String,a)] -> String -> Bool
1283 isFlag flags f = any (\(ff,_) -> ff == f) flags
1285 isPrefFlag :: String -> [(String,a)] -> String -> Bool
1286 isPrefFlag pref flags no_f
1287 | Just f <- maybePrefixMatch pref no_f = isFlag flags f
1291 getFlag :: [(String,a)] -> String -> a
1292 getFlag flags f = case [ opt | (ff, opt) <- flags, ff == f] of
1294 [] -> panic ("get_flag " ++ f)
1296 getPrefFlag :: String -> [(String,a)] -> String -> a
1297 getPrefFlag pref flags f = getFlag flags (fromJust (maybePrefixMatch pref f))
1298 -- We should only be passed flags which match the prefix
1300 -- -----------------------------------------------------------------------------
1301 -- Parsing the dynamic flags.
1303 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1304 parseDynamicFlags dflags args = do
1305 let ((leftover,errs),dflags')
1306 = runCmdLine (processArgs dynamic_flags args) dflags
1307 when (not (null errs)) $ do
1308 throwDyn (UsageError (unlines errs))
1309 return (dflags', leftover)
1312 type DynP = CmdLineP DynFlags
1314 upd :: (DynFlags -> DynFlags) -> DynP ()
1316 dfs <- getCmdLineState
1317 putCmdLineState $! (f dfs)
1319 --------------------------
1320 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1321 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1323 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1324 -- When you set f, set the ones it implies
1325 -- When you un-set f, however, we don't un-set the things it implies
1326 -- (except for -fno-glasgow-exts, which is treated specially)
1328 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1330 --------------------------
1331 setDumpFlag :: DynFlag -> OptKind DynP
1332 setDumpFlag dump_flag
1333 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1334 -- Whenver we -ddump, switch off the recompilation checker,
1335 -- else you don't see the dump!
1337 setVerbosity :: Maybe Int -> DynP ()
1338 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1340 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1342 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1345 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1347 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1349 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1352 | Nothing <- unpackPackageId pid
1353 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1355 = \s -> s{ thisPackage = pid }
1357 pid = stringToPackageId p
1359 -- If we're linking a binary, then only targets that produce object
1360 -- code are allowed (requests for other target types are ignored).
1361 setTarget l = upd set
1364 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1367 -- Changes the target only if we're compiling object code. This is
1368 -- used by -fasm and -fvia-C, which switch from one to the other, but
1369 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1370 -- can be safely used in an OPTIONS_GHC pragma.
1371 setObjTarget l = upd set
1374 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1377 setOptLevel :: Int -> DynFlags -> DynFlags
1378 setOptLevel n dflags
1379 | hscTarget dflags == HscInterpreted && n > 0
1381 -- not in IO any more, oh well:
1382 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1384 = updOptLevel n dflags
1387 setMainIs :: String -> DynP ()
1389 | not (null main_fn) -- The arg looked like "Foo.baz"
1390 = upd $ \d -> d{ mainFunIs = Just main_fn,
1391 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1393 | isUpper (head main_mod) -- The arg looked like "Foo"
1394 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1396 | otherwise -- The arg looked like "baz"
1397 = upd $ \d -> d{ mainFunIs = Just main_mod }
1399 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1401 -----------------------------------------------------------------------------
1402 -- Paths & Libraries
1404 -- -i on its own deletes the import paths
1405 addImportPath "" = upd (\s -> s{importPaths = []})
1406 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1410 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1413 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1415 addFrameworkPath p =
1416 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1418 split_marker = ':' -- not configurable (ToDo)
1420 splitPathList :: String -> [String]
1421 splitPathList s = filter notNull (splitUp s)
1422 -- empty paths are ignored: there might be a trailing
1423 -- ':' in the initial list, for example. Empty paths can
1424 -- cause confusion when they are translated into -I options
1425 -- for passing to gcc.
1427 #ifndef mingw32_TARGET_OS
1428 splitUp xs = split split_marker xs
1430 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1432 -- That is, if "foo:bar:baz" is used, this interpreted as
1433 -- consisting of three entries, 'foo', 'bar', 'baz'.
1434 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1435 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1437 -- Notice that no attempt is made to fully replace the 'standard'
1438 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1439 -- that this will cause too much breakage for users & ':' will
1440 -- work fine even with DOS paths, if you're not insisting on being silly.
1443 splitUp (x:':':div:xs) | div `elem` dir_markers
1444 = ((x:':':div:p): splitUp rs)
1446 (p,rs) = findNextPath xs
1447 -- we used to check for existence of the path here, but that
1448 -- required the IO monad to be threaded through the command-line
1449 -- parser which is quite inconvenient. The
1450 splitUp xs = cons p (splitUp rs)
1452 (p,rs) = findNextPath xs
1457 -- will be called either when we've consumed nought or the
1458 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1459 -- finding the next split marker.
1461 case break (`elem` split_markers) xs of
1462 (p, d:ds) -> (p, ds)
1465 split_markers :: [Char]
1466 split_markers = [':', ';']
1468 dir_markers :: [Char]
1469 dir_markers = ['/', '\\']
1472 -- -----------------------------------------------------------------------------
1473 -- tmpDir, where we store temporary files.
1475 setTmpDir :: FilePath -> DynFlags -> DynFlags
1476 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1478 #if !defined(mingw32_HOST_OS)
1479 canonicalise p = normalisePath p
1481 -- Canonicalisation of temp path under win32 is a bit more
1482 -- involved: (a) strip trailing slash,
1483 -- (b) normalise slashes
1484 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1486 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1488 -- if we're operating under cygwin, and TMP/TEMP is of
1489 -- the form "/cygdrive/drive/path", translate this to
1490 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1491 -- understand /cygdrive paths.)
1493 | "/cygdrive/" `isPrefixOf` path =
1494 case drop (length "/cygdrive/") path of
1495 drive:xs@('/':_) -> drive:':':xs
1499 -- strip the trailing backslash (awful, but we only do this once).
1500 removeTrailingSlash path =
1507 -----------------------------------------------------------------------------
1510 setOptHpcDir :: String -> DynP ()
1511 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1513 -----------------------------------------------------------------------------
1514 -- Via-C compilation stuff
1516 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1517 [String]) -- for registerised HC compilations
1518 machdepCCOpts dflags
1519 #if alpha_TARGET_ARCH
1521 #ifdef HAVE_THREADED_RTS_SUPPORT
1525 -- For now, to suppress the gcc warning "call-clobbered
1526 -- register used for global register variable", we simply
1527 -- disable all warnings altogether using the -w flag. Oh well.
1529 #elif hppa_TARGET_ARCH
1530 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1531 -- (very nice, but too bad the HP /usr/include files don't agree.)
1532 = ( ["-D_HPUX_SOURCE"], [] )
1534 #elif m68k_TARGET_ARCH
1535 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1536 -- popping of args to routines to be explicit; if we let things
1537 -- be deferred 'til after an STGJUMP, imminent death is certain!
1539 -- -fomit-frame-pointer : *don't*
1540 -- It's better to have a6 completely tied up being a frame pointer
1541 -- rather than let GCC pick random things to do with it.
1542 -- (If we want to steal a6, then we would try to do things
1543 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1544 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1546 #elif i386_TARGET_ARCH
1547 -- -fno-defer-pop : basically the same game as for m68k
1549 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1550 -- the fp (%ebp) for our register maps.
1551 = let n_regs = stolen_x86_regs dflags
1554 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1555 -- , if "mingw32" `isSuffixOf` cTARGETPLATFORM then "-mno-cygwin" else ""
1558 #ifdef HAVE_GCC_MNO_OMIT_LFPTR
1559 -- Some gccs are configured with
1560 -- -momit-leaf-frame-pointer on by default, and it
1561 -- apparently takes precedence over
1562 -- -fomit-frame-pointer, so we disable it first here.
1563 "-mno-omit-leaf-frame-pointer",
1565 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1566 "-fno-unit-at-a-time",
1567 -- unit-at-a-time doesn't do us any good, and screws
1568 -- up -split-objs by moving the split markers around.
1569 -- It's only turned on with -O2, but put it here just
1570 -- in case someone uses -optc-O2.
1572 "-fomit-frame-pointer",
1573 -- we want -fno-builtin, because when gcc inlines
1574 -- built-in functions like memcpy() it tends to
1575 -- run out of registers, requiring -monly-n-regs
1577 "-DSTOLEN_X86_REGS="++show n_regs ]
1580 #elif ia64_TARGET_ARCH
1581 = ( [], ["-fomit-frame-pointer", "-G0"] )
1583 #elif x86_64_TARGET_ARCH
1584 = ( [], ["-fomit-frame-pointer",
1585 "-fno-asynchronous-unwind-tables",
1586 -- the unwind tables are unnecessary for HC code,
1587 -- and get in the way of -split-objs. Another option
1588 -- would be to throw them away in the mangler, but this
1590 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1591 "-fno-unit-at-a-time",
1592 -- unit-at-a-time doesn't do us any good, and screws
1593 -- up -split-objs by moving the split markers around.
1594 -- It's only turned on with -O2, but put it here just
1595 -- in case someone uses -optc-O2.
1598 -- calling builtins like strlen() using the FFI can
1599 -- cause gcc to run out of regs, so use the external
1603 #elif sparc_TARGET_ARCH
1605 -- For now, to suppress the gcc warning "call-clobbered
1606 -- register used for global register variable", we simply
1607 -- disable all warnings altogether using the -w flag. Oh well.
1609 #elif powerpc_apple_darwin_TARGET
1611 -- Disable Apple's precompiling preprocessor. It's a great thing
1612 -- for "normal" programs, but it doesn't support register variable
1614 = ( [], ["-no-cpp-precomp"] )
1619 picCCOpts :: DynFlags -> [String]
1621 #if darwin_TARGET_OS
1622 -- Apple prefers to do things the other way round.
1623 -- PIC is on by default.
1624 -- -mdynamic-no-pic:
1625 -- Turn off PIC code generation.
1627 -- Don't generate "common" symbols - these are unwanted
1628 -- in dynamic libraries.
1633 = ["-mdynamic-no-pic"]
1634 #elif mingw32_TARGET_OS
1635 -- no -fPIC for Windows
1644 -- -----------------------------------------------------------------------------
1648 can_split = cSplitObjs == "YES"
1650 -- -----------------------------------------------------------------------------
1653 compilerInfo :: [(String, String)]
1654 compilerInfo = [("Project name", cProjectName),
1655 ("Project version", cProjectVersion),
1656 ("Booter version", cBooterVersion),
1658 ("Interface file version", cHscIfaceFileVersion),
1659 ("Object splitting", cSplitObjs),
1660 ("Have native code generator", cGhcWithNativeCodeGen),
1661 ("Unregisterised", cGhcUnregisterised),
1662 ("Tables next to code", cGhcEnableTablesNextToCode),
1663 ("Win32 DLLs", cEnableWin32DLLs),
1664 ("Leading underscore", cLeadingUnderscore)]