6 -- (c) The University of Glasgow 2005
9 -- Most flags are dynamic flags, which means they can change from
10 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
11 -- multi-session GHC each session can be using different dynamic
12 -- flags. Dynamic flags can also be set at the prompt in GHCi.
14 -- * Dynamic flags and associated configuration types
17 HscTarget(..), isObjectTarget, defaultObjectTarget,
18 GhcMode(..), isOneShot,
19 GhcLink(..), isNoLink,
26 -- ** Manipulating DynFlags
27 defaultDynFlags, -- DynFlags
28 initDynFlags, -- DynFlags -> IO DynFlags
30 dopt, -- DynFlag -> DynFlags -> Bool
31 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
32 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
39 -- ** Parsing DynFlags
43 supportedLanguages, languageOptions,
45 -- ** DynFlag C compiler options
46 machdepCCOpts, picCCOpts,
48 -- * Configuration of the core-to-core passes
55 -- * Configuration of the stg-to-stg passes
59 -- * Compiler configuration suitable for display to the user
63 #include "HsVersions.h"
67 import PrelNames ( mAIN, main_RDR_Unqual )
68 import RdrName ( RdrName, mkRdrUnqual )
69 import OccName ( mkVarOccFS )
70 #ifdef i386_TARGET_ARCH
71 import StaticFlags ( opt_Static )
73 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
75 import {-# SOURCE #-} Packages (PackageState)
76 import DriverPhases ( Phase(..), phaseInputExt )
79 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
81 import UniqFM ( UniqFM )
83 import Maybes ( orElse )
87 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
89 import Data.IORef ( readIORef )
90 import Control.Monad ( when )
93 import System.FilePath
94 import System.IO ( stderr, hPutChar )
96 -- -----------------------------------------------------------------------------
99 -- | Enumerates the simple on-or-off dynamic flags
105 | Opt_D_dump_cmmz_pretty
109 | Opt_D_dump_asm_native
110 | Opt_D_dump_asm_liveness
111 | Opt_D_dump_asm_coalesce
112 | Opt_D_dump_asm_regalloc
113 | Opt_D_dump_asm_regalloc_stages
114 | Opt_D_dump_asm_conflicts
115 | Opt_D_dump_asm_stats
121 | Opt_D_dump_inlinings
122 | Opt_D_dump_rule_firings
123 | Opt_D_dump_occur_anal
127 | Opt_D_dump_simpl_iterations
128 | Opt_D_dump_simpl_phases
137 | Opt_D_dump_worker_wrapper
138 | Opt_D_dump_rn_trace
139 | Opt_D_dump_rn_stats
141 | Opt_D_dump_simpl_stats
142 | Opt_D_dump_tc_trace
143 | Opt_D_dump_if_trace
149 | Opt_D_verbose_core2core
150 | Opt_D_verbose_stg2stg
152 | Opt_D_dump_hi_diffs
153 | Opt_D_dump_minimal_imports
154 | Opt_D_dump_mod_cycles
155 | Opt_D_dump_view_pattern_commoning
156 | Opt_D_faststring_stats
157 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
158 | Opt_D_no_debug_output
164 | Opt_WarnIsError -- -Werror; makes warnings fatal
165 | Opt_WarnDuplicateExports
167 | Opt_WarnImplicitPrelude
168 | Opt_WarnIncompletePatterns
169 | Opt_WarnIncompletePatternsRecUpd
170 | Opt_WarnMissingFields
171 | Opt_WarnMissingMethods
172 | Opt_WarnMissingSigs
173 | Opt_WarnNameShadowing
174 | Opt_WarnOverlappingPatterns
175 | Opt_WarnSimplePatterns
176 | Opt_WarnTypeDefaults
177 | Opt_WarnMonomorphism
178 | Opt_WarnUnusedBinds
179 | Opt_WarnUnusedImports
180 | Opt_WarnUnusedMatches
181 | Opt_WarnWarningsDeprecations
182 | Opt_WarnDeprecatedFlags
183 | Opt_WarnDodgyImports
186 | Opt_WarnUnrecognisedPragmas
187 | Opt_WarnDodgyForeignImports
190 | Opt_OverlappingInstances
191 | Opt_UndecidableInstances
192 | Opt_IncoherentInstances
193 | Opt_MonomorphismRestriction
195 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
196 | Opt_ForeignFunctionInterface
197 | Opt_UnliftedFFITypes
198 | Opt_PArr -- Syntactic support for parallel arrays
199 | Opt_Arrows -- Arrow-notation syntax
200 | Opt_TemplateHaskell
203 | Opt_Generics -- "Derivable type classes"
204 | Opt_ImplicitPrelude
205 | Opt_ScopedTypeVariables
209 | Opt_OverloadedStrings
210 | Opt_DisambiguateRecordFields
211 | Opt_RecordWildCards
216 | Opt_StandaloneDeriving
217 | Opt_DeriveDataTypeable
218 | Opt_TypeSynonymInstances
219 | Opt_FlexibleContexts
220 | Opt_FlexibleInstances
221 | Opt_ConstrainedClassMethods
222 | Opt_MultiParamTypeClasses
223 | Opt_FunctionalDependencies
225 | Opt_PolymorphicComponents
226 | Opt_ExistentialQuantification
230 | Opt_ParallelListComp
231 | Opt_TransformListComp
232 | Opt_GeneralizedNewtypeDeriving
234 | Opt_PostfixOperators
236 | Opt_LiberalTypeSynonyms
239 | Opt_ImpredicativeTypes
243 | Opt_PrintExplicitForalls
248 | Opt_StaticArgumentTransformation
252 | Opt_IgnoreInterfacePragmas
253 | Opt_OmitInterfacePragmas
254 | Opt_DoLambdaEtaExpansion
258 | Opt_UnboxStrictFields
261 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
263 | Opt_RegsGraph -- do graph coloring register allocation
264 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
272 | Opt_ExcessPrecision
273 | Opt_ReadUserPackageConf
277 | Opt_HideAllPackages
278 | Opt_PrintBindResult
282 | Opt_BreakOnException
284 | Opt_PrintEvldWithShow
285 | Opt_PrintBindContents
289 | Opt_ConvertToZipCfgAndBack
290 | Opt_AutoLinkPackages
291 | Opt_ImplicitImportQualified
302 -- | Contains not only a collection of 'DynFlag's but also a plethora of
303 -- information relating to the compilation of a single file or GHC session
304 data DynFlags = DynFlags {
307 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
308 stgToDo :: Maybe [StgToDo], -- similarly
309 hscTarget :: HscTarget,
310 hscOutName :: String, -- ^ Name of the output file
311 extCoreName :: String, -- ^ Name of the .hcr output file
312 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
313 optLevel :: Int, -- ^ Optimisation level
314 simplPhases :: Int, -- ^ Number of simplifier phases
315 maxSimplIterations :: Int, -- ^ Max simplifier iterations
316 shouldDumpSimplPhase :: SimplifierMode -> Bool,
317 ruleCheck :: Maybe String,
319 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
320 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
321 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
323 stolen_x86_regs :: Int,
324 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
325 importPaths :: [FilePath],
327 mainFunIs :: Maybe String,
328 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
330 dphBackend :: DPHBackend,
332 thisPackage :: PackageId, -- ^ name of package currently being compiled
335 wayNames :: [WayName], -- ^ Way flags from the command line
336 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
337 rtsBuildTag :: String, -- ^ The RTS \"way\"
340 objectDir :: Maybe String,
341 hiDir :: Maybe String,
342 stubDir :: Maybe String,
348 outputFile :: Maybe String,
349 outputHi :: Maybe String,
350 dynLibLoader :: DynLibLoader,
352 -- | This is set by 'DriverPipeline.runPipeline' based on where
353 -- its output is going.
354 dumpPrefix :: Maybe FilePath,
356 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
357 -- Set by @-ddump-file-prefix@
358 dumpPrefixForce :: Maybe FilePath,
360 includePaths :: [String],
361 libraryPaths :: [String],
362 frameworkPaths :: [String], -- used on darwin only
363 cmdlineFrameworks :: [String], -- ditto
364 tmpDir :: String, -- no trailing '/'
366 ghcUsagePath :: FilePath, -- Filled in by SysTools
367 ghciUsagePath :: FilePath, -- ditto
369 hpcDir :: String, -- ^ Path to store the .mix files
371 -- options for particular phases
379 opt_windres :: [String],
381 -- commands for particular phases
383 pgm_P :: (String,[Option]),
385 pgm_c :: (String,[Option]),
386 pgm_m :: (String,[Option]),
387 pgm_s :: (String,[Option]),
388 pgm_a :: (String,[Option]),
389 pgm_l :: (String,[Option]),
390 pgm_dll :: (String,[Option]),
392 pgm_sysman :: String,
393 pgm_windres :: String,
396 depMakefile :: FilePath,
397 depIncludePkgDeps :: Bool,
398 depExcludeMods :: [ModuleName],
399 depSuffixes :: [String],
403 extraPkgConfs :: [FilePath],
404 topDir :: FilePath, -- filled in by SysTools
405 systemPackageConfig :: FilePath, -- ditto
406 -- ^ The @-package-conf@ flags given on the command line, in the order
409 packageFlags :: [PackageFlag],
410 -- ^ The @-package@ and @-hide-package@ flags from the command-line
413 -- NB. do not modify this field, it is calculated by
414 -- Packages.initPackages and Packages.updatePackages.
415 pkgDatabase :: Maybe (UniqFM PackageConfig),
416 pkgState :: PackageState,
421 -- | Message output action: use "ErrUtils" instead of this if you can
422 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
424 haddockOptions :: Maybe String
435 -- | Will this target result in an object file on the disk?
436 isObjectTarget :: HscTarget -> Bool
437 isObjectTarget HscC = True
438 isObjectTarget HscAsm = True
439 isObjectTarget _ = False
441 -- | The 'GhcMode' tells us whether we're doing multi-module
442 -- compilation (controlled via the "GHC" API) or one-shot
443 -- (single-module) compilation. This makes a difference primarily to
444 -- the "Finder": in one-shot mode we look for interface files for
445 -- imported modules, but in multi-module mode we look for source files
446 -- in order to check whether they need to be recompiled.
448 = CompManager -- ^ @\-\-make@, GHCi, etc.
449 | OneShot -- ^ @ghc -c Foo.hs@
450 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
453 isOneShot :: GhcMode -> Bool
454 isOneShot OneShot = True
455 isOneShot _other = False
457 -- | What to do in the link step, if there is one.
459 = NoLink -- ^ Don't link at all
460 | LinkBinary -- ^ Link object code into a binary
461 | LinkInMemory -- ^ Use the in-memory dynamic linker
462 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
465 isNoLink :: GhcLink -> Bool
466 isNoLink NoLink = True
470 = ExposePackage String
472 | IgnorePackage String
475 defaultHscTarget :: HscTarget
476 defaultHscTarget = defaultObjectTarget
478 -- | The 'HscTarget' value corresponding to the default way to create
479 -- object files on the current platform.
480 defaultObjectTarget :: HscTarget
482 | cGhcWithNativeCodeGen == "YES" = HscAsm
487 | Wrapped (Maybe String)
491 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
492 initDynFlags :: DynFlags -> IO DynFlags
493 initDynFlags dflags = do
494 -- someday these will be dynamic flags
495 ways <- readIORef v_Ways
496 build_tag <- readIORef v_Build_tag
497 rts_build_tag <- readIORef v_RTS_Build_tag
500 buildTag = build_tag,
501 rtsBuildTag = rts_build_tag
504 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
505 -- and must be fully initialized by 'GHC.newSession' first.
506 defaultDynFlags :: DynFlags
509 ghcMode = CompManager,
510 ghcLink = LinkBinary,
513 hscTarget = defaultHscTarget,
519 maxSimplIterations = 4,
520 shouldDumpSimplPhase = const False,
522 specConstrThreshold = Just 200,
523 specConstrCount = Just 3,
524 liberateCaseThreshold = Just 200,
526 cmdlineHcIncludes = [],
530 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
534 thisPackage = mainPackageId,
540 objectSuf = phaseInputExt StopLn,
541 hcSuf = phaseInputExt HCc,
544 outputFile = Nothing,
546 dynLibLoader = Deployable,
547 dumpPrefix = Nothing,
548 dumpPrefixForce = Nothing,
552 cmdlineFrameworks = [],
553 tmpDir = cDEFAULT_TMPDIR,
570 pkgDatabase = Nothing,
571 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
572 wayNames = panic "defaultDynFlags: No wayNames",
573 buildTag = panic "defaultDynFlags: No buildTag",
574 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
575 -- initSysTools fills all these in
576 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
577 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
578 topDir = panic "defaultDynFlags: No topDir",
579 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
580 pgm_L = panic "defaultDynFlags: No pgm_L",
581 pgm_P = panic "defaultDynFlags: No pgm_P",
582 pgm_F = panic "defaultDynFlags: No pgm_F",
583 pgm_c = panic "defaultDynFlags: No pgm_c",
584 pgm_m = panic "defaultDynFlags: No pgm_m",
585 pgm_s = panic "defaultDynFlags: No pgm_s",
586 pgm_a = panic "defaultDynFlags: No pgm_a",
587 pgm_l = panic "defaultDynFlags: No pgm_l",
588 pgm_dll = panic "defaultDynFlags: No pgm_dll",
589 pgm_T = panic "defaultDynFlags: No pgm_T",
590 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
591 pgm_windres = panic "defaultDynFlags: No pgm_windres",
592 -- end of initSysTools values
594 depMakefile = "Makefile",
595 depIncludePkgDeps = False,
599 -- end of ghc -M values
600 haddockOptions = Nothing,
602 Opt_AutoLinkPackages,
603 Opt_ReadUserPackageConf,
605 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
606 -- behaviour the default, to see if anyone notices
610 Opt_MonomorphismRestriction,
618 Opt_PrintBindContents
620 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
621 -- The default -O0 options
624 log_action = \severity srcSpan style msg ->
626 SevInfo -> printErrs (msg style)
627 SevFatal -> printErrs (msg style)
630 printErrs ((mkLocMessage srcSpan msg) style)
631 -- careful (#2302): printErrs prints in UTF-8, whereas
632 -- converting to string first and using hPutStr would
633 -- just emit the low 8 bits of each unicode char.
640 0 | print errors & warnings only
641 1 | minimal verbosity: print "compiling M ... done." for each module.
642 2 | equivalent to -dshow-passes
643 3 | equivalent to existing "ghc -v"
644 4 | "ghc -v -ddump-most"
645 5 | "ghc -v -ddump-all"
648 -- | Test whether a 'DynFlag' is set
649 dopt :: DynFlag -> DynFlags -> Bool
650 dopt f dflags = f `elem` (flags dflags)
653 dopt_set :: DynFlags -> DynFlag -> DynFlags
654 dopt_set dfs f = dfs{ flags = f : flags dfs }
656 -- | Unset a 'DynFlag'
657 dopt_unset :: DynFlags -> DynFlag -> DynFlags
658 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
660 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
661 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
662 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
663 -> [a] -- ^ Correctly ordered extracted options
664 getOpts dflags opts = reverse (opts dflags)
665 -- We add to the options from the front, so we need to reverse the list
667 -- | Gets the verbosity flag for the current verbosity level. This is fed to
668 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
669 getVerbFlag :: DynFlags -> String
671 | verbosity dflags >= 3 = "-v"
674 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
675 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
676 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
677 addCmdlineFramework, addHaddockOpts
678 :: String -> DynFlags -> DynFlags
679 setOutputFile, setOutputHi, setDumpPrefixForce
680 :: Maybe String -> DynFlags -> DynFlags
682 setObjectDir f d = d{ objectDir = Just f}
683 setHiDir f d = d{ hiDir = Just f}
684 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
685 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
686 -- \#included from the .hc file when compiling with -fvia-C.
688 setObjectSuf f d = d{ objectSuf = f}
689 setHiSuf f d = d{ hiSuf = f}
690 setHcSuf f d = d{ hcSuf = f}
692 setOutputFile f d = d{ outputFile = f}
693 setOutputHi f d = d{ outputHi = f}
695 parseDynLibLoaderMode f d =
697 ("deploy", "") -> d{ dynLibLoader = Deployable }
698 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
699 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
700 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
701 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
702 (_,_) -> error "Unknown dynlib loader"
704 setDumpPrefixForce f d = d { dumpPrefixForce = f}
706 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
707 -- Config.hs should really use Option.
708 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
710 setPgmL f d = d{ pgm_L = f}
711 setPgmF f d = d{ pgm_F = f}
712 setPgmc f d = d{ pgm_c = (f,[])}
713 setPgmm f d = d{ pgm_m = (f,[])}
714 setPgms f d = d{ pgm_s = (f,[])}
715 setPgma f d = d{ pgm_a = (f,[])}
716 setPgml f d = d{ pgm_l = (f,[])}
717 setPgmdll f d = d{ pgm_dll = (f,[])}
718 setPgmwindres f d = d{ pgm_windres = f}
720 addOptL f d = d{ opt_L = f : opt_L d}
721 addOptP f d = d{ opt_P = f : opt_P d}
722 addOptF f d = d{ opt_F = f : opt_F d}
723 addOptc f d = d{ opt_c = f : opt_c d}
724 addOptm f d = d{ opt_m = f : opt_m d}
725 addOpta f d = d{ opt_a = f : opt_a d}
726 addOptl f d = d{ opt_l = f : opt_l d}
727 addOptwindres f d = d{ opt_windres = f : opt_windres d}
729 setDepMakefile :: FilePath -> DynFlags -> DynFlags
730 setDepMakefile f d = d { depMakefile = deOptDep f }
732 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
733 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
735 addDepExcludeMod :: String -> DynFlags -> DynFlags
737 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
739 addDepSuffix :: FilePath -> DynFlags -> DynFlags
740 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
742 setDepWarnings :: Bool -> DynFlags -> DynFlags
743 setDepWarnings b d = d { depWarnings = b }
746 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
747 -- we need to strip the "-optdep" off of the arg
748 deOptDep :: String -> String
749 deOptDep x = case maybePrefixMatch "-optdep" x of
753 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
755 addHaddockOpts f d = d{ haddockOptions = Just f}
757 -- -----------------------------------------------------------------------------
758 -- Command-line options
760 -- | When invoking external tools as part of the compilation pipeline, we
761 -- pass these a sequence of options on the command-line. Rather than
762 -- just using a list of Strings, we use a type that allows us to distinguish
763 -- between filepaths and 'other stuff'. The reason for this is that
764 -- this type gives us a handle on transforming filenames, and filenames only,
765 -- to whatever format they're expected to be on a particular platform.
767 = FileOption -- an entry that _contains_ filename(s) / filepaths.
768 String -- a non-filepath prefix that shouldn't be
769 -- transformed (e.g., "/out=")
770 String -- the filepath/filename portion
773 -----------------------------------------------------------------------------
774 -- Setting the optimisation level
776 updOptLevel :: Int -> DynFlags -> DynFlags
777 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
779 = dfs2{ optLevel = final_n }
781 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
782 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
783 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
785 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
786 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
788 optLevelFlags :: [([Int], DynFlag)]
790 = [ ([0], Opt_IgnoreInterfacePragmas)
791 , ([0], Opt_OmitInterfacePragmas)
793 , ([1,2], Opt_IgnoreAsserts)
794 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
796 , ([1,2], Opt_DoEtaReduction)
797 , ([1,2], Opt_CaseMerge)
798 , ([1,2], Opt_Strictness)
800 , ([1,2], Opt_FullLaziness)
802 , ([2], Opt_LiberateCase)
803 , ([2], Opt_SpecConstr)
804 , ([2], Opt_StaticArgumentTransformation)
806 , ([0,1,2], Opt_DoLambdaEtaExpansion)
807 -- This one is important for a tiresome reason:
808 -- we want to make sure that the bindings for data
809 -- constructors are eta-expanded. This is probably
810 -- a good thing anyway, but it seems fragile.
813 -- -----------------------------------------------------------------------------
814 -- Standard sets of warning options
816 standardWarnings :: [DynFlag]
818 = [ Opt_WarnWarningsDeprecations,
819 Opt_WarnDeprecatedFlags,
820 Opt_WarnUnrecognisedPragmas,
821 Opt_WarnOverlappingPatterns,
822 Opt_WarnMissingFields,
823 Opt_WarnMissingMethods,
824 Opt_WarnDuplicateExports,
825 Opt_WarnDodgyForeignImports
828 minusWOpts :: [DynFlag]
830 = standardWarnings ++
831 [ Opt_WarnUnusedBinds,
832 Opt_WarnUnusedMatches,
833 Opt_WarnUnusedImports,
834 Opt_WarnIncompletePatterns,
838 minusWallOpts :: [DynFlag]
841 [ Opt_WarnTypeDefaults,
842 Opt_WarnNameShadowing,
848 -- minuswRemovesOpts should be every warning option
849 minuswRemovesOpts :: [DynFlag]
852 [Opt_WarnImplicitPrelude,
853 Opt_WarnIncompletePatternsRecUpd,
854 Opt_WarnSimplePatterns,
855 Opt_WarnMonomorphism,
856 Opt_WarnUnrecognisedPragmas,
860 -- -----------------------------------------------------------------------------
861 -- CoreToDo: abstraction of core-to-core passes to run.
863 data CoreToDo -- These are diff core-to-core passes,
864 -- which may be invoked in any order,
865 -- as many times as you like.
867 = CoreDoSimplify -- The core-to-core simplifier.
870 -- Each run of the simplifier can take a different
871 -- set of simplifier-specific flags.
873 | CoreDoFloatOutwards FloatOutSwitches
878 | CoreDoWorkerWrapper
881 | CoreDoOldStrictness
884 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
885 -- matching this string
886 | CoreDoVectorisation DPHBackend
887 | CoreDoNothing -- Useful when building up
888 | CoreDoPasses [CoreToDo] -- lists of these things
890 data SimplifierMode -- See comments in SimplMonad
892 | SimplPhase Int [String]
894 data SimplifierSwitch
895 = MaxSimplifierIterations Int
898 data FloatOutSwitches
899 = FloatOutSw Bool -- True <=> float lambdas to top level
900 Bool -- True <=> float constants to top level,
901 -- even if they do not escape a lambda
904 -- The core-to-core pass ordering is derived from the DynFlags:
905 runWhen :: Bool -> CoreToDo -> CoreToDo
906 runWhen True do_this = do_this
907 runWhen False _ = CoreDoNothing
909 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
910 runMaybe (Just x) f = f x
911 runMaybe Nothing _ = CoreDoNothing
913 getCoreToDo :: DynFlags -> [CoreToDo]
915 | Just todo <- coreToDo dflags = todo -- set explicitly by user
916 | otherwise = core_todo
918 opt_level = optLevel dflags
919 phases = simplPhases dflags
920 max_iter = maxSimplIterations dflags
921 strictness = dopt Opt_Strictness dflags
922 full_laziness = dopt Opt_FullLaziness dflags
923 cse = dopt Opt_CSE dflags
924 spec_constr = dopt Opt_SpecConstr dflags
925 liberate_case = dopt Opt_LiberateCase dflags
926 rule_check = ruleCheck dflags
927 static_args = dopt Opt_StaticArgumentTransformation dflags
929 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
931 simpl_phase phase names iter
933 [ CoreDoSimplify (SimplPhase phase names) [
934 MaxSimplifierIterations iter
936 maybe_rule_check phase
940 = runWhen (dopt Opt_Vectorise dflags)
941 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
944 -- By default, we have 2 phases before phase 0.
946 -- Want to run with inline phase 2 after the specialiser to give
947 -- maximum chance for fusion to work before we inline build/augment
948 -- in phase 1. This made a difference in 'ansi' where an
949 -- overloaded function wasn't inlined till too late.
951 -- Need phase 1 so that build/augment get
952 -- inlined. I found that spectral/hartel/genfft lost some useful
953 -- strictness in the function sumcode' if augment is not inlined
954 -- before strictness analysis runs
955 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
956 | phase <- [phases, phases-1 .. 1] ]
959 -- initial simplify: mk specialiser happy: minimum effort please
960 simpl_gently = CoreDoSimplify SimplGently [
962 -- Don't inline anything till full laziness has bitten
963 -- In particular, inlining wrappers inhibits floating
964 -- e.g. ...(case f x of ...)...
965 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
966 -- ==> ...(case x of I# x# -> case fw x# of ...)...
967 -- and now the redex (f x) isn't floatable any more
968 -- Similarly, don't apply any rules until after full
969 -- laziness. Notably, list fusion can prevent floating.
971 NoCaseOfCase, -- Don't do case-of-case transformations.
972 -- This makes full laziness work better
973 MaxSimplifierIterations max_iter
977 if opt_level == 0 then
979 simpl_phase 0 ["final"] max_iter]
980 else {- opt_level >= 1 -} [
982 -- We want to do the static argument transform before full laziness as it
983 -- may expose extra opportunities to float things outwards. However, to fix
984 -- up the output of the transformation we need at do at least one simplify
985 -- after this before anything else
986 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
988 -- We run vectorisation here for now, but we might also try to run
992 -- initial simplify: mk specialiser happy: minimum effort please
995 -- Specialisation is best done before full laziness
996 -- so that overloaded functions have all their dictionary lambdas manifest
999 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1005 -- Phase 0: allow all Ids to be inlined now
1006 -- This gets foldr inlined before strictness analysis
1008 -- At least 3 iterations because otherwise we land up with
1009 -- huge dead expressions because of an infelicity in the
1011 -- let k = BIG in foldr k z xs
1012 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1013 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1015 simpl_phase 0 ["main"] (max max_iter 3),
1018 #ifdef OLD_STRICTNESS
1019 CoreDoOldStrictness,
1021 runWhen strictness (CoreDoPasses [
1023 CoreDoWorkerWrapper,
1025 simpl_phase 0 ["post-worker-wrapper"] max_iter
1028 runWhen full_laziness
1029 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1030 True)), -- Float constants
1031 -- nofib/spectral/hartel/wang doubles in speed if you
1032 -- do full laziness late in the day. It only happens
1033 -- after fusion and other stuff, so the early pass doesn't
1034 -- catch it. For the record, the redex is
1035 -- f_el22 (f_el21 r_midblock)
1038 runWhen cse CoreCSE,
1039 -- We want CSE to follow the final full-laziness pass, because it may
1040 -- succeed in commoning up things floated out by full laziness.
1041 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1047 -- Case-liberation for -O2. This should be after
1048 -- strictness analysis and the simplification which follows it.
1049 runWhen liberate_case (CoreDoPasses [
1051 simpl_phase 0 ["post-liberate-case"] max_iter
1052 ]), -- Run the simplifier after LiberateCase to vastly
1053 -- reduce the possiblility of shadowing
1054 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1056 runWhen spec_constr CoreDoSpecConstr,
1060 -- Final clean-up simplification:
1061 simpl_phase 0 ["final"] max_iter
1064 -- -----------------------------------------------------------------------------
1065 -- StgToDo: abstraction of stg-to-stg passes to run.
1068 = StgDoMassageForProfiling -- should be (next to) last
1069 -- There's also setStgVarInfo, but its absolute "lastness"
1070 -- is so critical that it is hardwired in (no flag).
1073 getStgToDo :: DynFlags -> [StgToDo]
1075 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1078 stg_stats = dopt Opt_StgStats dflags
1080 todo1 = if stg_stats then [D_stg_stats] else []
1082 todo2 | WayProf `elem` wayNames dflags
1083 = StgDoMassageForProfiling : todo1
1087 -- -----------------------------------------------------------------------------
1090 allFlags :: [String]
1091 allFlags = map ('-':) $
1092 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1093 map ("fno-"++) flags ++
1094 map ("f"++) flags ++
1095 map ("X"++) supportedLanguages ++
1096 map ("XNo"++) supportedLanguages
1097 where ok (PrefixPred _ _) = False
1099 flags = [ name | (name, _, _) <- fFlags ]
1101 dynamic_flags :: [Flag DynP]
1103 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1104 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1105 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1106 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1107 , Flag "v" (OptIntSuffix setVerbosity) Supported
1109 ------- Specific phases --------------------------------------------
1110 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1111 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1112 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1113 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1114 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1115 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1116 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1117 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1118 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1119 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1121 , Flag "optL" (HasArg (upd . addOptL)) Supported
1122 , Flag "optP" (HasArg (upd . addOptP)) Supported
1123 , Flag "optF" (HasArg (upd . addOptF)) Supported
1124 , Flag "optc" (HasArg (upd . addOptc)) Supported
1125 , Flag "optm" (HasArg (upd . addOptm)) Supported
1126 , Flag "opta" (HasArg (upd . addOpta)) Supported
1127 , Flag "optl" (HasArg (upd . addOptl)) Supported
1128 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1131 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1134 -------- ghc -M -----------------------------------------------------
1135 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1136 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1137 (Deprecated "Use -dep-suffix instead")
1138 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1139 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1140 (Deprecated "Use -dep-makefile instead")
1141 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1142 (Deprecated "-optdep-w doesn't do anything")
1143 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1144 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1145 (Deprecated "Use -include-pkg-deps instead")
1146 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1147 (Deprecated "Use -include-pkg-deps instead")
1148 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1149 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1150 (Deprecated "Use -exclude-module instead")
1151 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1152 (Deprecated "Use -exclude-module instead")
1154 -------- Linking ----------------------------------------------------
1155 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1157 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1158 (Deprecated "Use -c instead")
1159 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1161 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1164 ------- Libraries ---------------------------------------------------
1165 , Flag "L" (Prefix addLibraryPath ) Supported
1166 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1168 ------- Frameworks --------------------------------------------------
1169 -- -framework-path should really be -F ...
1170 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1171 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1173 ------- Output Redirection ------------------------------------------
1174 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1175 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1176 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1177 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1178 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1179 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1180 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1181 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1182 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1183 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1186 ------- Keeping temporary files -------------------------------------
1187 -- These can be singular (think ghc -c) or plural (think ghc --make)
1188 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1189 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1190 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1191 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1192 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1193 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1194 -- This only makes sense as plural
1195 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1197 ------- Miscellaneous ----------------------------------------------
1198 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1199 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1200 , Flag "main-is" (SepArg setMainIs ) Supported
1201 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1202 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1203 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1205 ------- recompilation checker --------------------------------------
1206 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1207 (Deprecated "Use -fno-force-recomp instead")
1208 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1209 (Deprecated "Use -fforce-recomp instead")
1211 ------- Packages ----------------------------------------------------
1212 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1213 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1215 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1216 , Flag "package" (HasArg exposePackage) Supported
1217 , Flag "hide-package" (HasArg hidePackage) Supported
1218 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1220 , Flag "ignore-package" (HasArg ignorePackage)
1222 , Flag "syslib" (HasArg exposePackage)
1223 (Deprecated "Use -package instead")
1225 ------ HsCpp opts ---------------------------------------------------
1226 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1227 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1229 ------- Include/Import Paths ----------------------------------------
1230 , Flag "I" (Prefix addIncludePath) Supported
1231 , Flag "i" (OptPrefix addImportPath ) Supported
1233 ------ Debugging ----------------------------------------------------
1234 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1236 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1238 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1240 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1242 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1244 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1246 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1248 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1250 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1252 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1254 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1256 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1258 , Flag "ddump-asm-regalloc-stages"
1259 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1261 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1263 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1265 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1267 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1269 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1271 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1273 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1275 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1277 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1279 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1281 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1283 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1285 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1287 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1289 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1291 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1293 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1295 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1297 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1299 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1301 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1303 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1305 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1307 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1309 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1311 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1313 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1315 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1317 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1319 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1321 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1323 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1325 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1327 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1329 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1331 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1333 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1335 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1337 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1339 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1341 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1343 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1346 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1348 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1350 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1352 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1354 , Flag "dshow-passes"
1355 (NoArg (do setDynFlag Opt_ForceRecomp
1356 setVerbosity (Just 2)))
1358 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1361 ------ Machine dependant (-m<blah>) stuff ---------------------------
1363 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1365 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1367 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1370 ------ Warning opts -------------------------------------------------
1371 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1373 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1375 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1377 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1379 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1380 (Deprecated "Use -w instead")
1381 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1384 ------ Optimisation flags ------------------------------------------
1385 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1386 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1387 (Deprecated "Use -O0 instead")
1388 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1389 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1391 -- If the number is missing, use 1
1393 , Flag "fsimplifier-phases"
1394 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1396 , Flag "fmax-simplifier-iterations"
1397 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1400 , Flag "fspec-constr-threshold"
1401 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1403 , Flag "fno-spec-constr-threshold"
1404 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1406 , Flag "fspec-constr-count"
1407 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1409 , Flag "fno-spec-constr-count"
1410 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1412 , Flag "fliberate-case-threshold"
1413 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1415 , Flag "fno-liberate-case-threshold"
1416 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1419 , Flag "frule-check"
1420 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1422 , Flag "fcontext-stack"
1423 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1426 ------ DPH flags ----------------------------------------------------
1429 (NoArg (upd (setDPHBackend DPHSeq)))
1432 (NoArg (upd (setDPHBackend DPHPar)))
1435 ------ Compiler flags -----------------------------------------------
1437 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1438 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1439 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1441 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1442 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1443 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1445 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1447 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1450 ++ map (mkFlag True "f" setDynFlag ) fFlags
1451 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1452 ++ map (mkFlag True "X" setDynFlag ) xFlags
1453 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1455 mkFlag :: Bool -- ^ True <=> it should be turned on
1456 -> String -- ^ The flag prefix
1457 -> (DynFlag -> DynP ())
1458 -> (String, DynFlag, Bool -> Deprecated)
1460 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1461 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1463 deprecatedForLanguage :: String -> Bool -> Deprecated
1464 deprecatedForLanguage lang turn_on
1465 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1467 flag | turn_on = lang
1468 | otherwise = "No"++lang
1470 useInstead :: String -> Bool -> Deprecated
1471 useInstead flag turn_on
1472 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1474 no = if turn_on then "" else "no-"
1476 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1477 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1479 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1480 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1481 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1482 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1483 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1484 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1485 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1486 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1487 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1488 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1489 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1490 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1491 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1492 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1493 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1494 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1495 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1496 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1497 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1498 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1499 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1500 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1501 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1502 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1503 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1504 ( "strictness", Opt_Strictness, const Supported ),
1505 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1506 ( "full-laziness", Opt_FullLaziness, const Supported ),
1507 ( "liberate-case", Opt_LiberateCase, const Supported ),
1508 ( "spec-constr", Opt_SpecConstr, const Supported ),
1509 ( "cse", Opt_CSE, const Supported ),
1510 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1511 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1512 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1513 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1514 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1515 ( "case-merge", Opt_CaseMerge, const Supported ),
1516 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1517 ( "method-sharing", Opt_MethodSharing, const Supported ),
1518 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1519 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1520 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1521 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1522 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1523 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1524 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1525 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1526 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1527 ( "break-on-error", Opt_BreakOnError, const Supported ),
1528 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1529 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1530 ( "run-cps", Opt_RunCPSZ, const Supported ),
1531 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1532 ( "vectorise", Opt_Vectorise, const Supported ),
1533 ( "regs-graph", Opt_RegsGraph, const Supported ),
1534 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1535 ( "th", Opt_TemplateHaskell,
1536 deprecatedForLanguage "TemplateHaskell" ),
1537 ( "fi", Opt_ForeignFunctionInterface,
1538 deprecatedForLanguage "ForeignFunctionInterface" ),
1539 ( "ffi", Opt_ForeignFunctionInterface,
1540 deprecatedForLanguage "ForeignFunctionInterface" ),
1541 ( "arrows", Opt_Arrows,
1542 deprecatedForLanguage "Arrows" ),
1543 ( "generics", Opt_Generics,
1544 deprecatedForLanguage "Generics" ),
1545 ( "implicit-prelude", Opt_ImplicitPrelude,
1546 deprecatedForLanguage "ImplicitPrelude" ),
1547 ( "bang-patterns", Opt_BangPatterns,
1548 deprecatedForLanguage "BangPatterns" ),
1549 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1550 deprecatedForLanguage "MonomorphismRestriction" ),
1551 ( "mono-pat-binds", Opt_MonoPatBinds,
1552 deprecatedForLanguage "MonoPatBinds" ),
1553 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1554 deprecatedForLanguage "ExtendedDefaultRules" ),
1555 ( "implicit-params", Opt_ImplicitParams,
1556 deprecatedForLanguage "ImplicitParams" ),
1557 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1558 deprecatedForLanguage "ScopedTypeVariables" ),
1560 deprecatedForLanguage "PArr" ),
1561 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1562 deprecatedForLanguage "OverlappingInstances" ),
1563 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1564 deprecatedForLanguage "UndecidableInstances" ),
1565 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1566 deprecatedForLanguage "IncoherentInstances" ),
1567 ( "gen-manifest", Opt_GenManifest, const Supported ),
1568 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1569 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1572 supportedLanguages :: [String]
1573 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1575 -- This may contain duplicates
1576 languageOptions :: [DynFlag]
1577 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1579 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1580 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1582 ( "CPP", Opt_Cpp, const Supported ),
1583 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1584 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1585 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1586 ( "MagicHash", Opt_MagicHash, const Supported ),
1587 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1588 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1589 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1590 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1591 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1592 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1593 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1594 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1595 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1596 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1597 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1598 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1599 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1600 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1601 ( "Arrows", Opt_Arrows, const Supported ),
1602 ( "PArr", Opt_PArr, const Supported ),
1603 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1604 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1605 ( "Generics", Opt_Generics, const Supported ),
1607 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1608 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1609 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1610 ( "RecordPuns", Opt_RecordPuns,
1611 deprecatedForLanguage "NamedFieldPuns" ),
1612 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1613 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1614 ( "GADTs", Opt_GADTs, const Supported ),
1615 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1616 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1617 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1619 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1620 -- On by default (which is not strictly H98):
1621 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1622 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1623 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1624 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1625 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1627 ( "PatternSignatures", Opt_ScopedTypeVariables,
1628 deprecatedForLanguage "ScopedTypeVariables" ),
1630 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1631 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1632 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1633 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1634 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1635 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1636 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1637 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1638 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1639 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1640 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1641 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1642 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1643 ( "PackageImports", Opt_PackageImports, const Supported )
1646 impliedFlags :: [(DynFlag, DynFlag)]
1648 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1649 -- be completely rigid for GADTs
1651 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1652 -- Note [Scoped tyvars] in TcBinds
1655 glasgowExtsFlags :: [DynFlag]
1656 glasgowExtsFlags = [
1657 Opt_PrintExplicitForalls
1658 , Opt_ForeignFunctionInterface
1659 , Opt_UnliftedFFITypes
1661 , Opt_ImplicitParams
1662 , Opt_ScopedTypeVariables
1664 , Opt_TypeSynonymInstances
1665 , Opt_StandaloneDeriving
1666 , Opt_DeriveDataTypeable
1667 , Opt_FlexibleContexts
1668 , Opt_FlexibleInstances
1669 , Opt_ConstrainedClassMethods
1670 , Opt_MultiParamTypeClasses
1671 , Opt_FunctionalDependencies
1673 , Opt_PolymorphicComponents
1674 , Opt_ExistentialQuantification
1676 , Opt_PostfixOperators
1678 , Opt_LiberalTypeSynonyms
1680 , Opt_ImpredicativeTypes
1683 , Opt_ParallelListComp
1684 , Opt_EmptyDataDecls
1685 , Opt_KindSignatures
1686 , Opt_GeneralizedNewtypeDeriving
1687 , Opt_TypeFamilies ]
1689 -- -----------------------------------------------------------------------------
1690 -- Parsing the dynamic flags.
1692 -- | Parse dynamic flags from a list of command line argument. Returns the
1693 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1694 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1695 -- flags or missing arguments).
1696 parseDynamicFlags :: Monad m =>
1697 DynFlags -> [Located String]
1698 -> m (DynFlags, [Located String], [Located String])
1699 -- ^ Updated 'DynFlags', left-over arguments, and
1700 -- list of warnings.
1701 parseDynamicFlags dflags args = do
1702 -- XXX Legacy support code
1703 -- We used to accept things like
1704 -- optdep-f -optdepdepend
1705 -- optdep-f -optdep depend
1706 -- optdep -f -optdepdepend
1707 -- optdep -f -optdep depend
1708 -- but the spaces trip up proper argument handling. So get rid of them.
1709 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1710 f (x : xs) = x : f xs
1713 let ((leftover, errs, warns), dflags')
1714 = runCmdLine (processArgs dynamic_flags args') dflags
1715 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1716 return (dflags', leftover, warns)
1718 type DynP = CmdLineP DynFlags
1720 upd :: (DynFlags -> DynFlags) -> DynP ()
1722 dfs <- getCmdLineState
1723 putCmdLineState $! (f dfs)
1725 --------------------------
1726 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1727 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1728 ; mapM_ setDynFlag deps }
1730 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1731 -- When you set f, set the ones it implies
1732 -- NB: use setDynFlag recursively, in case the implied flags
1733 -- implies further flags
1734 -- When you un-set f, however, we don't un-set the things it implies
1735 -- (except for -fno-glasgow-exts, which is treated specially)
1737 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1739 --------------------------
1740 setDumpFlag :: DynFlag -> OptKind DynP
1741 setDumpFlag dump_flag
1742 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1743 | otherwise = NoArg (setDynFlag dump_flag)
1745 -- Whenver we -ddump, switch off the recompilation checker,
1746 -- else you don't see the dump!
1747 -- However, certain dumpy-things are really interested in what's going
1748 -- on during recompilation checking, so in those cases we
1749 -- don't want to turn it off.
1750 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1751 Opt_D_dump_hi_diffs]
1753 setVerboseCore2Core :: DynP ()
1754 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1755 setDynFlag Opt_D_verbose_core2core
1756 upd (\s -> s { shouldDumpSimplPhase = const True })
1758 setDumpSimplPhases :: String -> DynP ()
1759 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1760 upd (\s -> s { shouldDumpSimplPhase = spec })
1762 spec :: SimplifierMode -> Bool
1764 . map (join (&&) . map match . split ':')
1770 join :: (Bool -> Bool -> Bool)
1771 -> [SimplifierMode -> Bool]
1772 -> SimplifierMode -> Bool
1773 join _ [] = const True
1774 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1776 match :: String -> SimplifierMode -> Bool
1777 match "" = const True
1778 match s = case reads s of
1779 [(n,"")] -> phase_num n
1782 phase_num :: Int -> SimplifierMode -> Bool
1783 phase_num n (SimplPhase k _) = n == k
1784 phase_num _ _ = False
1786 phase_name :: String -> SimplifierMode -> Bool
1787 phase_name s SimplGently = s == "gentle"
1788 phase_name s (SimplPhase _ ss) = s `elem` ss
1790 setVerbosity :: Maybe Int -> DynP ()
1791 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1793 addCmdlineHCInclude :: String -> DynP ()
1794 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1796 extraPkgConf_ :: FilePath -> DynP ()
1797 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1799 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1801 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1803 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1805 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1807 setPackageName :: String -> DynFlags -> DynFlags
1809 | Nothing <- unpackPackageId pid
1810 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1812 = \s -> s{ thisPackage = pid }
1814 pid = stringToPackageId p
1816 -- If we're linking a binary, then only targets that produce object
1817 -- code are allowed (requests for other target types are ignored).
1818 setTarget :: HscTarget -> DynP ()
1819 setTarget l = upd set
1822 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1825 -- Changes the target only if we're compiling object code. This is
1826 -- used by -fasm and -fvia-C, which switch from one to the other, but
1827 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1828 -- can be safely used in an OPTIONS_GHC pragma.
1829 setObjTarget :: HscTarget -> DynP ()
1830 setObjTarget l = upd set
1833 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1836 setOptLevel :: Int -> DynFlags -> DynFlags
1837 setOptLevel n dflags
1838 | hscTarget dflags == HscInterpreted && n > 0
1840 -- not in IO any more, oh well:
1841 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1843 = updOptLevel n dflags
1846 -- -Odph is equivalent to
1848 -- -O2 optimise as much as possible
1849 -- -fno-method-sharing sharing specialisation defeats fusion
1851 -- -fdicts-cheap always inline dictionaries
1852 -- -fmax-simplifier-iterations20 this is necessary sometimes
1853 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1855 setDPHOpt :: DynFlags -> DynFlags
1856 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1857 , specConstrThreshold = Nothing
1859 `dopt_set` Opt_DictsCheap
1860 `dopt_unset` Opt_MethodSharing
1862 data DPHBackend = DPHPar
1865 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1866 setDPHBackend backend dflags = dflags { dphBackend = backend }
1869 setMainIs :: String -> DynP ()
1871 | not (null main_fn) && isLower (head main_fn)
1872 -- The arg looked like "Foo.Bar.baz"
1873 = upd $ \d -> d{ mainFunIs = Just main_fn,
1874 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1876 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1877 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1879 | otherwise -- The arg looked like "baz"
1880 = upd $ \d -> d{ mainFunIs = Just arg }
1882 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1884 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1885 -- Either returns the default name or the one configured on the command line with -main-is
1886 getMainFun :: DynFlags -> RdrName
1887 getMainFun dflags = case (mainFunIs dflags) of
1888 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1889 Nothing -> main_RDR_Unqual
1891 -----------------------------------------------------------------------------
1892 -- Paths & Libraries
1894 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1896 -- -i on its own deletes the import paths
1897 addImportPath "" = upd (\s -> s{importPaths = []})
1898 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1902 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1905 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1907 addFrameworkPath p =
1908 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1910 #ifndef mingw32_TARGET_OS
1911 split_marker :: Char
1912 split_marker = ':' -- not configurable (ToDo)
1915 splitPathList :: String -> [String]
1916 splitPathList s = filter notNull (splitUp s)
1917 -- empty paths are ignored: there might be a trailing
1918 -- ':' in the initial list, for example. Empty paths can
1919 -- cause confusion when they are translated into -I options
1920 -- for passing to gcc.
1922 #ifndef mingw32_TARGET_OS
1923 splitUp xs = split split_marker xs
1925 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1927 -- That is, if "foo:bar:baz" is used, this interpreted as
1928 -- consisting of three entries, 'foo', 'bar', 'baz'.
1929 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1930 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1932 -- Notice that no attempt is made to fully replace the 'standard'
1933 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1934 -- that this will cause too much breakage for users & ':' will
1935 -- work fine even with DOS paths, if you're not insisting on being silly.
1938 splitUp (x:':':div:xs) | div `elem` dir_markers
1939 = ((x:':':div:p): splitUp rs)
1941 (p,rs) = findNextPath xs
1942 -- we used to check for existence of the path here, but that
1943 -- required the IO monad to be threaded through the command-line
1944 -- parser which is quite inconvenient. The
1945 splitUp xs = cons p (splitUp rs)
1947 (p,rs) = findNextPath xs
1952 -- will be called either when we've consumed nought or the
1953 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1954 -- finding the next split marker.
1956 case break (`elem` split_markers) xs of
1957 (p, _:ds) -> (p, ds)
1960 split_markers :: [Char]
1961 split_markers = [':', ';']
1963 dir_markers :: [Char]
1964 dir_markers = ['/', '\\']
1967 -- -----------------------------------------------------------------------------
1968 -- tmpDir, where we store temporary files.
1970 setTmpDir :: FilePath -> DynFlags -> DynFlags
1971 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1972 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1973 -- seem necessary now --SDM 7/2/2008
1975 -----------------------------------------------------------------------------
1978 setOptHpcDir :: String -> DynP ()
1979 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1981 -----------------------------------------------------------------------------
1982 -- Via-C compilation stuff
1984 -- There are some options that we need to pass to gcc when compiling
1985 -- Haskell code via C, but are only supported by recent versions of
1986 -- gcc. The configure script decides which of these options we need,
1987 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1988 -- read before each via-C compilation. The advantage of having these
1989 -- in a separate file is that the file can be created at install-time
1990 -- depending on the available gcc version, and even re-generated later
1991 -- if gcc is upgraded.
1993 -- The options below are not dependent on the version of gcc, only the
1996 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1997 [String]) -- for registerised HC compilations
1998 machdepCCOpts _dflags
1999 #if alpha_TARGET_ARCH
2001 #ifdef HAVE_THREADED_RTS_SUPPORT
2005 -- For now, to suppress the gcc warning "call-clobbered
2006 -- register used for global register variable", we simply
2007 -- disable all warnings altogether using the -w flag. Oh well.
2009 #elif hppa_TARGET_ARCH
2010 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2011 -- (very nice, but too bad the HP /usr/include files don't agree.)
2012 = ( ["-D_HPUX_SOURCE"], [] )
2014 #elif m68k_TARGET_ARCH
2015 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2016 -- popping of args to routines to be explicit; if we let things
2017 -- be deferred 'til after an STGJUMP, imminent death is certain!
2019 -- -fomit-frame-pointer : *don't*
2020 -- It's better to have a6 completely tied up being a frame pointer
2021 -- rather than let GCC pick random things to do with it.
2022 -- (If we want to steal a6, then we would try to do things
2023 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2024 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2026 #elif i386_TARGET_ARCH
2027 -- -fno-defer-pop : basically the same game as for m68k
2029 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2030 -- the fp (%ebp) for our register maps.
2031 = let n_regs = stolen_x86_regs _dflags
2034 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2037 "-fomit-frame-pointer",
2038 -- we want -fno-builtin, because when gcc inlines
2039 -- built-in functions like memcpy() it tends to
2040 -- run out of registers, requiring -monly-n-regs
2042 "-DSTOLEN_X86_REGS="++show n_regs ]
2045 #elif ia64_TARGET_ARCH
2046 = ( [], ["-fomit-frame-pointer", "-G0"] )
2048 #elif x86_64_TARGET_ARCH
2049 = ( [], ["-fomit-frame-pointer",
2050 "-fno-asynchronous-unwind-tables",
2051 -- the unwind tables are unnecessary for HC code,
2052 -- and get in the way of -split-objs. Another option
2053 -- would be to throw them away in the mangler, but this
2056 -- calling builtins like strlen() using the FFI can
2057 -- cause gcc to run out of regs, so use the external
2061 #elif sparc_TARGET_ARCH
2063 -- For now, to suppress the gcc warning "call-clobbered
2064 -- register used for global register variable", we simply
2065 -- disable all warnings altogether using the -w flag. Oh well.
2067 #elif powerpc_apple_darwin_TARGET
2069 -- Disable Apple's precompiling preprocessor. It's a great thing
2070 -- for "normal" programs, but it doesn't support register variable
2072 = ( [], ["-no-cpp-precomp"] )
2077 picCCOpts :: DynFlags -> [String]
2079 #if darwin_TARGET_OS
2080 -- Apple prefers to do things the other way round.
2081 -- PIC is on by default.
2082 -- -mdynamic-no-pic:
2083 -- Turn off PIC code generation.
2085 -- Don't generate "common" symbols - these are unwanted
2086 -- in dynamic libraries.
2089 = ["-fno-common", "-D__PIC__"]
2091 = ["-mdynamic-no-pic"]
2092 #elif mingw32_TARGET_OS
2093 -- no -fPIC for Windows
2100 = ["-fPIC", "-D__PIC__"]
2105 -- -----------------------------------------------------------------------------
2109 can_split = cSplitObjs == "YES"
2111 -- -----------------------------------------------------------------------------
2114 compilerInfo :: [(String, String)]
2115 compilerInfo = [("Project name", cProjectName),
2116 ("Project version", cProjectVersion),
2117 ("Booter version", cBooterVersion),
2119 ("Interface file version", cHscIfaceFileVersion),
2120 ("Have interpreter", cGhcWithInterpreter),
2121 ("Object splitting", cSplitObjs),
2122 ("Have native code generator", cGhcWithNativeCodeGen),
2123 ("Support SMP", cGhcWithSMP),
2124 ("Unregisterised", cGhcUnregisterised),
2125 ("Tables next to code", cGhcEnableTablesNextToCode),
2126 ("Win32 DLLs", cEnableWin32DLLs),
2127 ("RTS ways", cGhcRTSWays),
2128 ("Leading underscore", cLeadingUnderscore),
2129 ("Debug on", show debugIsOn)