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
41 parseDynamicNoPackageFlags,
44 supportedLanguages, languageOptions,
46 -- ** DynFlag C compiler options
47 machdepCCOpts, picCCOpts,
49 -- * Configuration of the core-to-core passes
56 -- * Configuration of the stg-to-stg passes
60 -- * Compiler configuration suitable for display to the user
64 #include "HsVersions.h"
68 import PrelNames ( mAIN, main_RDR_Unqual )
69 import RdrName ( RdrName, mkRdrUnqual )
70 import OccName ( mkVarOccFS )
71 #ifdef i386_TARGET_ARCH
72 import StaticFlags ( opt_Static )
74 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
76 import {-# SOURCE #-} Packages (PackageState)
77 import DriverPhases ( Phase(..), phaseInputExt )
80 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
82 import UniqFM ( UniqFM )
84 import Maybes ( orElse )
88 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
90 import Data.IORef ( readIORef )
91 import Control.Monad ( when )
94 import System.FilePath
95 import System.IO ( stderr, hPutChar )
97 -- -----------------------------------------------------------------------------
100 -- | Enumerates the simple on-or-off dynamic flags
106 | Opt_D_dump_cmmz_pretty
110 | Opt_D_dump_asm_native
111 | Opt_D_dump_asm_liveness
112 | Opt_D_dump_asm_coalesce
113 | Opt_D_dump_asm_regalloc
114 | Opt_D_dump_asm_regalloc_stages
115 | Opt_D_dump_asm_conflicts
116 | Opt_D_dump_asm_stats
122 | Opt_D_dump_inlinings
123 | Opt_D_dump_rule_firings
124 | Opt_D_dump_occur_anal
128 | Opt_D_dump_simpl_iterations
129 | Opt_D_dump_simpl_phases
138 | Opt_D_dump_worker_wrapper
139 | Opt_D_dump_rn_trace
140 | Opt_D_dump_rn_stats
142 | Opt_D_dump_simpl_stats
143 | Opt_D_dump_tc_trace
144 | Opt_D_dump_if_trace
151 | Opt_D_verbose_core2core
152 | Opt_D_verbose_stg2stg
154 | Opt_D_dump_hi_diffs
155 | Opt_D_dump_minimal_imports
156 | Opt_D_dump_mod_cycles
157 | Opt_D_dump_view_pattern_commoning
158 | Opt_D_faststring_stats
159 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
160 | Opt_D_no_debug_output
166 | Opt_WarnIsError -- -Werror; makes warnings fatal
167 | Opt_WarnDuplicateExports
169 | Opt_WarnImplicitPrelude
170 | Opt_WarnIncompletePatterns
171 | Opt_WarnIncompletePatternsRecUpd
172 | Opt_WarnMissingFields
173 | Opt_WarnMissingMethods
174 | Opt_WarnMissingSigs
175 | Opt_WarnNameShadowing
176 | Opt_WarnOverlappingPatterns
177 | Opt_WarnSimplePatterns
178 | Opt_WarnTypeDefaults
179 | Opt_WarnMonomorphism
180 | Opt_WarnUnusedBinds
181 | Opt_WarnUnusedImports
182 | Opt_WarnUnusedMatches
183 | Opt_WarnWarningsDeprecations
184 | Opt_WarnDeprecatedFlags
185 | Opt_WarnDodgyImports
188 | Opt_WarnUnrecognisedPragmas
189 | Opt_WarnDodgyForeignImports
192 | Opt_OverlappingInstances
193 | Opt_UndecidableInstances
194 | Opt_IncoherentInstances
195 | Opt_MonomorphismRestriction
197 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
198 | Opt_ForeignFunctionInterface
199 | Opt_UnliftedFFITypes
200 | Opt_PArr -- Syntactic support for parallel arrays
201 | Opt_Arrows -- Arrow-notation syntax
202 | Opt_TemplateHaskell
205 | Opt_Generics -- "Derivable type classes"
206 | Opt_ImplicitPrelude
207 | Opt_ScopedTypeVariables
211 | Opt_OverloadedStrings
212 | Opt_DisambiguateRecordFields
213 | Opt_RecordWildCards
218 | Opt_StandaloneDeriving
219 | Opt_DeriveDataTypeable
220 | Opt_TypeSynonymInstances
221 | Opt_FlexibleContexts
222 | Opt_FlexibleInstances
223 | Opt_ConstrainedClassMethods
224 | Opt_MultiParamTypeClasses
225 | Opt_FunctionalDependencies
227 | Opt_PolymorphicComponents
228 | Opt_ExistentialQuantification
232 | Opt_ParallelListComp
233 | Opt_TransformListComp
234 | Opt_GeneralizedNewtypeDeriving
236 | Opt_PostfixOperators
238 | Opt_LiberalTypeSynonyms
241 | Opt_ImpredicativeTypes
244 | Opt_NewQualifiedOperators
246 | Opt_PrintExplicitForalls
251 | Opt_StaticArgumentTransformation
255 | Opt_IgnoreInterfacePragmas
256 | Opt_OmitInterfacePragmas
257 | Opt_DoLambdaEtaExpansion
261 | Opt_UnboxStrictFields
264 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
266 | Opt_RegsGraph -- do graph coloring register allocation
267 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
275 | Opt_ExcessPrecision
276 | Opt_ReadUserPackageConf
280 | Opt_HideAllPackages
281 | Opt_PrintBindResult
285 | Opt_BreakOnException
287 | Opt_PrintEvldWithShow
288 | Opt_PrintBindContents
292 | Opt_ConvertToZipCfgAndBack
293 | Opt_AutoLinkPackages
294 | Opt_ImplicitImportQualified
302 | Opt_KeepRawTokenStream
306 -- | Contains not only a collection of 'DynFlag's but also a plethora of
307 -- information relating to the compilation of a single file or GHC session
308 data DynFlags = DynFlags {
311 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
312 stgToDo :: Maybe [StgToDo], -- similarly
313 hscTarget :: HscTarget,
314 hscOutName :: String, -- ^ Name of the output file
315 extCoreName :: String, -- ^ Name of the .hcr output file
316 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
317 optLevel :: Int, -- ^ Optimisation level
318 simplPhases :: Int, -- ^ Number of simplifier phases
319 maxSimplIterations :: Int, -- ^ Max simplifier iterations
320 shouldDumpSimplPhase :: SimplifierMode -> Bool,
321 ruleCheck :: Maybe String,
323 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
324 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
325 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
327 stolen_x86_regs :: Int,
328 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
329 importPaths :: [FilePath],
331 mainFunIs :: Maybe String,
332 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
334 dphBackend :: DPHBackend,
336 thisPackage :: PackageId, -- ^ name of package currently being compiled
339 wayNames :: [WayName], -- ^ Way flags from the command line
340 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
341 rtsBuildTag :: String, -- ^ The RTS \"way\"
344 objectDir :: Maybe String,
345 hiDir :: Maybe String,
346 stubDir :: Maybe String,
352 outputFile :: Maybe String,
353 outputHi :: Maybe String,
354 dynLibLoader :: DynLibLoader,
356 -- | This is set by 'DriverPipeline.runPipeline' based on where
357 -- its output is going.
358 dumpPrefix :: Maybe FilePath,
360 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
361 -- Set by @-ddump-file-prefix@
362 dumpPrefixForce :: Maybe FilePath,
364 includePaths :: [String],
365 libraryPaths :: [String],
366 frameworkPaths :: [String], -- used on darwin only
367 cmdlineFrameworks :: [String], -- ditto
368 tmpDir :: String, -- no trailing '/'
370 ghcUsagePath :: FilePath, -- Filled in by SysTools
371 ghciUsagePath :: FilePath, -- ditto
373 hpcDir :: String, -- ^ Path to store the .mix files
375 -- options for particular phases
383 opt_windres :: [String],
385 -- commands for particular phases
387 pgm_P :: (String,[Option]),
389 pgm_c :: (String,[Option]),
390 pgm_m :: (String,[Option]),
391 pgm_s :: (String,[Option]),
392 pgm_a :: (String,[Option]),
393 pgm_l :: (String,[Option]),
394 pgm_dll :: (String,[Option]),
396 pgm_sysman :: String,
397 pgm_windres :: String,
400 depMakefile :: FilePath,
401 depIncludePkgDeps :: Bool,
402 depExcludeMods :: [ModuleName],
403 depSuffixes :: [String],
407 extraPkgConfs :: [FilePath],
408 topDir :: FilePath, -- filled in by SysTools
409 systemPackageConfig :: FilePath, -- ditto
410 -- ^ The @-package-conf@ flags given on the command line, in the order
413 packageFlags :: [PackageFlag],
414 -- ^ The @-package@ and @-hide-package@ flags from the command-line
417 -- NB. do not modify this field, it is calculated by
418 -- Packages.initPackages and Packages.updatePackages.
419 pkgDatabase :: Maybe (UniqFM PackageConfig),
420 pkgState :: PackageState,
425 -- | Message output action: use "ErrUtils" instead of this if you can
426 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
428 haddockOptions :: Maybe String
439 -- | Will this target result in an object file on the disk?
440 isObjectTarget :: HscTarget -> Bool
441 isObjectTarget HscC = True
442 isObjectTarget HscAsm = True
443 isObjectTarget _ = False
445 -- | The 'GhcMode' tells us whether we're doing multi-module
446 -- compilation (controlled via the "GHC" API) or one-shot
447 -- (single-module) compilation. This makes a difference primarily to
448 -- the "Finder": in one-shot mode we look for interface files for
449 -- imported modules, but in multi-module mode we look for source files
450 -- in order to check whether they need to be recompiled.
452 = CompManager -- ^ @\-\-make@, GHCi, etc.
453 | OneShot -- ^ @ghc -c Foo.hs@
454 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
457 instance Outputable GhcMode where
458 ppr CompManager = ptext (sLit "CompManager")
459 ppr OneShot = ptext (sLit "OneShot")
460 ppr MkDepend = ptext (sLit "MkDepend")
462 isOneShot :: GhcMode -> Bool
463 isOneShot OneShot = True
464 isOneShot _other = False
466 -- | What to do in the link step, if there is one.
468 = NoLink -- ^ Don't link at all
469 | LinkBinary -- ^ Link object code into a binary
470 | LinkInMemory -- ^ Use the in-memory dynamic linker
471 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
474 isNoLink :: GhcLink -> Bool
475 isNoLink NoLink = True
479 = ExposePackage String
481 | IgnorePackage String
484 defaultHscTarget :: HscTarget
485 defaultHscTarget = defaultObjectTarget
487 -- | The 'HscTarget' value corresponding to the default way to create
488 -- object files on the current platform.
489 defaultObjectTarget :: HscTarget
491 | cGhcWithNativeCodeGen == "YES" = HscAsm
496 | Wrapped (Maybe String)
500 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
501 initDynFlags :: DynFlags -> IO DynFlags
502 initDynFlags dflags = do
503 -- someday these will be dynamic flags
504 ways <- readIORef v_Ways
505 build_tag <- readIORef v_Build_tag
506 rts_build_tag <- readIORef v_RTS_Build_tag
509 buildTag = build_tag,
510 rtsBuildTag = rts_build_tag
513 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
514 -- and must be fully initialized by 'GHC.newSession' first.
515 defaultDynFlags :: DynFlags
518 ghcMode = CompManager,
519 ghcLink = LinkBinary,
522 hscTarget = defaultHscTarget,
528 maxSimplIterations = 4,
529 shouldDumpSimplPhase = const False,
531 specConstrThreshold = Just 200,
532 specConstrCount = Just 3,
533 liberateCaseThreshold = Just 200,
535 cmdlineHcIncludes = [],
539 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
543 thisPackage = mainPackageId,
549 objectSuf = phaseInputExt StopLn,
550 hcSuf = phaseInputExt HCc,
553 outputFile = Nothing,
555 dynLibLoader = Deployable,
556 dumpPrefix = Nothing,
557 dumpPrefixForce = Nothing,
561 cmdlineFrameworks = [],
562 tmpDir = cDEFAULT_TMPDIR,
579 pkgDatabase = Nothing,
580 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
581 wayNames = panic "defaultDynFlags: No wayNames",
582 buildTag = panic "defaultDynFlags: No buildTag",
583 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
584 -- initSysTools fills all these in
585 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
586 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
587 topDir = panic "defaultDynFlags: No topDir",
588 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
589 pgm_L = panic "defaultDynFlags: No pgm_L",
590 pgm_P = panic "defaultDynFlags: No pgm_P",
591 pgm_F = panic "defaultDynFlags: No pgm_F",
592 pgm_c = panic "defaultDynFlags: No pgm_c",
593 pgm_m = panic "defaultDynFlags: No pgm_m",
594 pgm_s = panic "defaultDynFlags: No pgm_s",
595 pgm_a = panic "defaultDynFlags: No pgm_a",
596 pgm_l = panic "defaultDynFlags: No pgm_l",
597 pgm_dll = panic "defaultDynFlags: No pgm_dll",
598 pgm_T = panic "defaultDynFlags: No pgm_T",
599 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
600 pgm_windres = panic "defaultDynFlags: No pgm_windres",
601 -- end of initSysTools values
603 depMakefile = "Makefile",
604 depIncludePkgDeps = False,
608 -- end of ghc -M values
609 haddockOptions = Nothing,
611 Opt_AutoLinkPackages,
612 Opt_ReadUserPackageConf,
614 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
615 -- behaviour the default, to see if anyone notices
619 Opt_MonomorphismRestriction,
627 Opt_PrintBindContents
629 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
630 -- The default -O0 options
633 log_action = \severity srcSpan style msg ->
635 SevInfo -> printErrs (msg style)
636 SevFatal -> printErrs (msg style)
639 printErrs ((mkLocMessage srcSpan msg) style)
640 -- careful (#2302): printErrs prints in UTF-8, whereas
641 -- converting to string first and using hPutStr would
642 -- just emit the low 8 bits of each unicode char.
649 0 | print errors & warnings only
650 1 | minimal verbosity: print "compiling M ... done." for each module.
651 2 | equivalent to -dshow-passes
652 3 | equivalent to existing "ghc -v"
653 4 | "ghc -v -ddump-most"
654 5 | "ghc -v -ddump-all"
657 -- | Test whether a 'DynFlag' is set
658 dopt :: DynFlag -> DynFlags -> Bool
659 dopt f dflags = f `elem` (flags dflags)
662 dopt_set :: DynFlags -> DynFlag -> DynFlags
663 dopt_set dfs f = dfs{ flags = f : flags dfs }
665 -- | Unset a 'DynFlag'
666 dopt_unset :: DynFlags -> DynFlag -> DynFlags
667 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
669 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
670 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
671 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
672 -> [a] -- ^ Correctly ordered extracted options
673 getOpts dflags opts = reverse (opts dflags)
674 -- We add to the options from the front, so we need to reverse the list
676 -- | Gets the verbosity flag for the current verbosity level. This is fed to
677 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
678 getVerbFlag :: DynFlags -> String
680 | verbosity dflags >= 3 = "-v"
683 setObjectDir, setHiDir, setStubDir, setOutputDir,
684 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
685 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
686 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
687 addCmdlineFramework, addHaddockOpts
688 :: String -> DynFlags -> DynFlags
689 setOutputFile, setOutputHi, setDumpPrefixForce
690 :: Maybe String -> DynFlags -> DynFlags
692 setObjectDir f d = d{ objectDir = Just f}
693 setHiDir f d = d{ hiDir = Just f}
694 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
695 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
696 -- \#included from the .hc file when compiling with -fvia-C.
697 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
699 setObjectSuf f d = d{ objectSuf = f}
700 setHiSuf f d = d{ hiSuf = f}
701 setHcSuf f d = d{ hcSuf = f}
703 setOutputFile f d = d{ outputFile = f}
704 setOutputHi f d = d{ outputHi = f}
706 parseDynLibLoaderMode f d =
708 ("deploy", "") -> d{ dynLibLoader = Deployable }
709 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
710 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
711 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
712 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
713 (_,_) -> error "Unknown dynlib loader"
715 setDumpPrefixForce f d = d { dumpPrefixForce = f}
717 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
718 -- Config.hs should really use Option.
719 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
721 setPgmL f d = d{ pgm_L = f}
722 setPgmF f d = d{ pgm_F = f}
723 setPgmc f d = d{ pgm_c = (f,[])}
724 setPgmm f d = d{ pgm_m = (f,[])}
725 setPgms f d = d{ pgm_s = (f,[])}
726 setPgma f d = d{ pgm_a = (f,[])}
727 setPgml f d = d{ pgm_l = (f,[])}
728 setPgmdll f d = d{ pgm_dll = (f,[])}
729 setPgmwindres f d = d{ pgm_windres = f}
731 addOptL f d = d{ opt_L = f : opt_L d}
732 addOptP f d = d{ opt_P = f : opt_P d}
733 addOptF f d = d{ opt_F = f : opt_F d}
734 addOptc f d = d{ opt_c = f : opt_c d}
735 addOptm f d = d{ opt_m = f : opt_m d}
736 addOpta f d = d{ opt_a = f : opt_a d}
737 addOptl f d = d{ opt_l = f : opt_l d}
738 addOptwindres f d = d{ opt_windres = f : opt_windres d}
740 setDepMakefile :: FilePath -> DynFlags -> DynFlags
741 setDepMakefile f d = d { depMakefile = deOptDep f }
743 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
744 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
746 addDepExcludeMod :: String -> DynFlags -> DynFlags
748 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
750 addDepSuffix :: FilePath -> DynFlags -> DynFlags
751 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
753 setDepWarnings :: Bool -> DynFlags -> DynFlags
754 setDepWarnings b d = d { depWarnings = b }
757 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
758 -- we need to strip the "-optdep" off of the arg
759 deOptDep :: String -> String
760 deOptDep x = case maybePrefixMatch "-optdep" x of
764 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
766 addHaddockOpts f d = d{ haddockOptions = Just f}
768 -- -----------------------------------------------------------------------------
769 -- Command-line options
771 -- | When invoking external tools as part of the compilation pipeline, we
772 -- pass these a sequence of options on the command-line. Rather than
773 -- just using a list of Strings, we use a type that allows us to distinguish
774 -- between filepaths and 'other stuff'. The reason for this is that
775 -- this type gives us a handle on transforming filenames, and filenames only,
776 -- to whatever format they're expected to be on a particular platform.
778 = FileOption -- an entry that _contains_ filename(s) / filepaths.
779 String -- a non-filepath prefix that shouldn't be
780 -- transformed (e.g., "/out=")
781 String -- the filepath/filename portion
784 -----------------------------------------------------------------------------
785 -- Setting the optimisation level
787 updOptLevel :: Int -> DynFlags -> DynFlags
788 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
790 = dfs2{ optLevel = final_n }
792 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
793 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
794 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
796 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
797 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
799 optLevelFlags :: [([Int], DynFlag)]
801 = [ ([0], Opt_IgnoreInterfacePragmas)
802 , ([0], Opt_OmitInterfacePragmas)
804 , ([1,2], Opt_IgnoreAsserts)
805 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
807 , ([1,2], Opt_DoEtaReduction)
808 , ([1,2], Opt_CaseMerge)
809 , ([1,2], Opt_Strictness)
811 , ([1,2], Opt_FullLaziness)
813 , ([2], Opt_LiberateCase)
814 , ([2], Opt_SpecConstr)
816 -- , ([2], Opt_StaticArgumentTransformation)
817 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
818 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
819 -- several improvements to the heuristics, and I'm concerned that without
820 -- those changes SAT will interfere with some attempts to write "high
821 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
822 -- this year. In particular, the version in HEAD lacks the tail call
823 -- criterion, so many things that look like reasonable loops will be
824 -- turned into functions with extra (unneccesary) thunk creation.
826 , ([0,1,2], Opt_DoLambdaEtaExpansion)
827 -- This one is important for a tiresome reason:
828 -- we want to make sure that the bindings for data
829 -- constructors are eta-expanded. This is probably
830 -- a good thing anyway, but it seems fragile.
833 -- -----------------------------------------------------------------------------
834 -- Standard sets of warning options
836 standardWarnings :: [DynFlag]
838 = [ Opt_WarnWarningsDeprecations,
839 Opt_WarnDeprecatedFlags,
840 Opt_WarnUnrecognisedPragmas,
841 Opt_WarnOverlappingPatterns,
842 Opt_WarnMissingFields,
843 Opt_WarnMissingMethods,
844 Opt_WarnDuplicateExports,
845 Opt_WarnDodgyForeignImports
848 minusWOpts :: [DynFlag]
850 = standardWarnings ++
851 [ Opt_WarnUnusedBinds,
852 Opt_WarnUnusedMatches,
853 Opt_WarnUnusedImports,
854 Opt_WarnIncompletePatterns,
858 minusWallOpts :: [DynFlag]
861 [ Opt_WarnTypeDefaults,
862 Opt_WarnNameShadowing,
868 -- minuswRemovesOpts should be every warning option
869 minuswRemovesOpts :: [DynFlag]
872 [Opt_WarnImplicitPrelude,
873 Opt_WarnIncompletePatternsRecUpd,
874 Opt_WarnSimplePatterns,
875 Opt_WarnMonomorphism,
876 Opt_WarnUnrecognisedPragmas,
880 -- -----------------------------------------------------------------------------
881 -- CoreToDo: abstraction of core-to-core passes to run.
883 data CoreToDo -- These are diff core-to-core passes,
884 -- which may be invoked in any order,
885 -- as many times as you like.
887 = CoreDoSimplify -- The core-to-core simplifier.
890 -- Each run of the simplifier can take a different
891 -- set of simplifier-specific flags.
893 | CoreDoFloatOutwards FloatOutSwitches
898 | CoreDoWorkerWrapper
901 | CoreDoOldStrictness
904 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
905 -- matching this string
906 | CoreDoVectorisation PackageId
907 | CoreDoNothing -- Useful when building up
908 | CoreDoPasses [CoreToDo] -- lists of these things
910 data SimplifierMode -- See comments in SimplMonad
912 | SimplPhase Int [String]
914 data SimplifierSwitch
915 = MaxSimplifierIterations Int
918 data FloatOutSwitches
919 = FloatOutSw Bool -- True <=> float lambdas to top level
920 Bool -- True <=> float constants to top level,
921 -- even if they do not escape a lambda
924 -- The core-to-core pass ordering is derived from the DynFlags:
925 runWhen :: Bool -> CoreToDo -> CoreToDo
926 runWhen True do_this = do_this
927 runWhen False _ = CoreDoNothing
929 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
930 runMaybe (Just x) f = f x
931 runMaybe Nothing _ = CoreDoNothing
933 getCoreToDo :: DynFlags -> [CoreToDo]
935 | Just todo <- coreToDo dflags = todo -- set explicitly by user
936 | otherwise = core_todo
938 opt_level = optLevel dflags
939 phases = simplPhases dflags
940 max_iter = maxSimplIterations dflags
941 strictness = dopt Opt_Strictness dflags
942 full_laziness = dopt Opt_FullLaziness dflags
943 cse = dopt Opt_CSE dflags
944 spec_constr = dopt Opt_SpecConstr dflags
945 liberate_case = dopt Opt_LiberateCase dflags
946 rule_check = ruleCheck dflags
947 static_args = dopt Opt_StaticArgumentTransformation dflags
949 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
951 simpl_phase phase names iter
953 [ CoreDoSimplify (SimplPhase phase names) [
954 MaxSimplifierIterations iter
956 maybe_rule_check phase
960 = runWhen (dopt Opt_Vectorise dflags)
961 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
964 -- By default, we have 2 phases before phase 0.
966 -- Want to run with inline phase 2 after the specialiser to give
967 -- maximum chance for fusion to work before we inline build/augment
968 -- in phase 1. This made a difference in 'ansi' where an
969 -- overloaded function wasn't inlined till too late.
971 -- Need phase 1 so that build/augment get
972 -- inlined. I found that spectral/hartel/genfft lost some useful
973 -- strictness in the function sumcode' if augment is not inlined
974 -- before strictness analysis runs
975 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
976 | phase <- [phases, phases-1 .. 1] ]
979 -- initial simplify: mk specialiser happy: minimum effort please
980 simpl_gently = CoreDoSimplify SimplGently [
982 -- Don't inline anything till full laziness has bitten
983 -- In particular, inlining wrappers inhibits floating
984 -- e.g. ...(case f x of ...)...
985 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
986 -- ==> ...(case x of I# x# -> case fw x# of ...)...
987 -- and now the redex (f x) isn't floatable any more
988 -- Similarly, don't apply any rules until after full
989 -- laziness. Notably, list fusion can prevent floating.
991 NoCaseOfCase, -- Don't do case-of-case transformations.
992 -- This makes full laziness work better
993 MaxSimplifierIterations max_iter
997 if opt_level == 0 then
999 simpl_phase 0 ["final"] max_iter]
1000 else {- opt_level >= 1 -} [
1002 -- We want to do the static argument transform before full laziness as it
1003 -- may expose extra opportunities to float things outwards. However, to fix
1004 -- up the output of the transformation we need at do at least one simplify
1005 -- after this before anything else
1006 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1008 -- We run vectorisation here for now, but we might also try to run
1012 -- initial simplify: mk specialiser happy: minimum effort please
1015 -- Specialisation is best done before full laziness
1016 -- so that overloaded functions have all their dictionary lambdas manifest
1019 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1025 -- Phase 0: allow all Ids to be inlined now
1026 -- This gets foldr inlined before strictness analysis
1028 -- At least 3 iterations because otherwise we land up with
1029 -- huge dead expressions because of an infelicity in the
1031 -- let k = BIG in foldr k z xs
1032 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1033 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1035 simpl_phase 0 ["main"] (max max_iter 3),
1038 #ifdef OLD_STRICTNESS
1039 CoreDoOldStrictness,
1041 runWhen strictness (CoreDoPasses [
1043 CoreDoWorkerWrapper,
1045 simpl_phase 0 ["post-worker-wrapper"] max_iter
1048 runWhen full_laziness
1049 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1050 True)), -- Float constants
1051 -- nofib/spectral/hartel/wang doubles in speed if you
1052 -- do full laziness late in the day. It only happens
1053 -- after fusion and other stuff, so the early pass doesn't
1054 -- catch it. For the record, the redex is
1055 -- f_el22 (f_el21 r_midblock)
1058 runWhen cse CoreCSE,
1059 -- We want CSE to follow the final full-laziness pass, because it may
1060 -- succeed in commoning up things floated out by full laziness.
1061 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1067 -- Case-liberation for -O2. This should be after
1068 -- strictness analysis and the simplification which follows it.
1069 runWhen liberate_case (CoreDoPasses [
1071 simpl_phase 0 ["post-liberate-case"] max_iter
1072 ]), -- Run the simplifier after LiberateCase to vastly
1073 -- reduce the possiblility of shadowing
1074 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1076 runWhen spec_constr CoreDoSpecConstr,
1080 -- Final clean-up simplification:
1081 simpl_phase 0 ["final"] max_iter
1084 -- -----------------------------------------------------------------------------
1085 -- StgToDo: abstraction of stg-to-stg passes to run.
1088 = StgDoMassageForProfiling -- should be (next to) last
1089 -- There's also setStgVarInfo, but its absolute "lastness"
1090 -- is so critical that it is hardwired in (no flag).
1093 getStgToDo :: DynFlags -> [StgToDo]
1095 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1098 stg_stats = dopt Opt_StgStats dflags
1100 todo1 = if stg_stats then [D_stg_stats] else []
1102 todo2 | WayProf `elem` wayNames dflags
1103 = StgDoMassageForProfiling : todo1
1107 -- -----------------------------------------------------------------------------
1110 allFlags :: [String]
1111 allFlags = map ('-':) $
1112 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1113 map ("fno-"++) flags ++
1114 map ("f"++) flags ++
1115 map ("X"++) supportedLanguages ++
1116 map ("XNo"++) supportedLanguages
1117 where ok (PrefixPred _ _) = False
1119 flags = [ name | (name, _, _) <- fFlags ]
1121 dynamic_flags :: [Flag DynP]
1123 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1124 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1125 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1126 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1127 , Flag "v" (OptIntSuffix setVerbosity) Supported
1129 ------- Specific phases --------------------------------------------
1130 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1131 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1132 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1133 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1134 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1135 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1136 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1137 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1138 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1139 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1141 , Flag "optL" (HasArg (upd . addOptL)) Supported
1142 , Flag "optP" (HasArg (upd . addOptP)) Supported
1143 , Flag "optF" (HasArg (upd . addOptF)) Supported
1144 , Flag "optc" (HasArg (upd . addOptc)) Supported
1145 , Flag "optm" (HasArg (upd . addOptm)) Supported
1146 , Flag "opta" (HasArg (upd . addOpta)) Supported
1147 , Flag "optl" (HasArg (upd . addOptl)) Supported
1148 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1151 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1154 -------- ghc -M -----------------------------------------------------
1155 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1156 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1157 (Deprecated "Use -dep-suffix instead")
1158 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1159 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1160 (Deprecated "Use -dep-makefile instead")
1161 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1162 (Deprecated "-optdep-w doesn't do anything")
1163 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1164 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1165 (Deprecated "Use -include-pkg-deps instead")
1166 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1167 (Deprecated "Use -include-pkg-deps instead")
1168 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1169 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1170 (Deprecated "Use -exclude-module instead")
1171 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1172 (Deprecated "Use -exclude-module instead")
1174 -------- Linking ----------------------------------------------------
1175 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1177 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1178 (Deprecated "Use -c instead")
1179 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1181 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1184 ------- Libraries ---------------------------------------------------
1185 , Flag "L" (Prefix addLibraryPath ) Supported
1186 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1188 ------- Frameworks --------------------------------------------------
1189 -- -framework-path should really be -F ...
1190 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1191 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1193 ------- Output Redirection ------------------------------------------
1194 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1195 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1196 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1197 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1198 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1199 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1200 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1201 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1202 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1203 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1204 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1207 ------- Keeping temporary files -------------------------------------
1208 -- These can be singular (think ghc -c) or plural (think ghc --make)
1209 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1210 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1211 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1212 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1213 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1214 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1215 -- This only makes sense as plural
1216 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1218 ------- Miscellaneous ----------------------------------------------
1219 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1220 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1221 , Flag "main-is" (SepArg setMainIs ) Supported
1222 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1223 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1224 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1226 ------- recompilation checker --------------------------------------
1227 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1228 (Deprecated "Use -fno-force-recomp instead")
1229 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1230 (Deprecated "Use -fforce-recomp instead")
1232 ------ HsCpp opts ---------------------------------------------------
1233 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1234 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1236 ------- Include/Import Paths ----------------------------------------
1237 , Flag "I" (Prefix addIncludePath) Supported
1238 , Flag "i" (OptPrefix addImportPath ) Supported
1240 ------ Debugging ----------------------------------------------------
1241 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1243 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1245 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1247 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1249 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1251 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1253 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1255 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1257 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1259 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1261 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1263 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1265 , Flag "ddump-asm-regalloc-stages"
1266 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1268 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1270 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1272 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1274 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1276 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1278 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1280 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1282 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1284 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1286 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1288 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1290 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1292 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1294 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1296 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1298 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1300 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1302 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1304 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1306 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1308 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1310 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1312 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1314 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1316 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1318 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1320 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1322 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1324 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1326 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1328 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1330 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1332 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1334 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1336 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1338 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1340 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1342 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1344 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1346 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1348 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1350 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1352 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1355 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1357 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1359 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1361 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1363 , Flag "dshow-passes"
1364 (NoArg (do forceRecompile
1365 setVerbosity (Just 2)))
1367 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1370 ------ Machine dependant (-m<blah>) stuff ---------------------------
1372 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1374 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1376 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1379 ------ Warning opts -------------------------------------------------
1380 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1382 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1384 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1386 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1388 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1389 (Deprecated "Use -w instead")
1390 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1393 ------ Optimisation flags ------------------------------------------
1394 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1395 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1396 (Deprecated "Use -O0 instead")
1397 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1398 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1400 -- If the number is missing, use 1
1402 , Flag "fsimplifier-phases"
1403 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1405 , Flag "fmax-simplifier-iterations"
1406 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1409 , Flag "fspec-constr-threshold"
1410 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1412 , Flag "fno-spec-constr-threshold"
1413 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1415 , Flag "fspec-constr-count"
1416 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1418 , Flag "fno-spec-constr-count"
1419 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1421 , Flag "fliberate-case-threshold"
1422 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1424 , Flag "fno-liberate-case-threshold"
1425 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1428 , Flag "frule-check"
1429 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1431 , Flag "fcontext-stack"
1432 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1435 ------ DPH flags ----------------------------------------------------
1438 (NoArg (setDPHBackend DPHSeq))
1441 (NoArg (setDPHBackend DPHPar))
1444 (NoArg (setDPHBackend DPHThis))
1447 ------ Compiler flags -----------------------------------------------
1449 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1450 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1451 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1453 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1454 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1455 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1457 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1459 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1462 ++ map (mkFlag True "f" setDynFlag ) fFlags
1463 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1464 ++ map (mkFlag True "X" setDynFlag ) xFlags
1465 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1467 package_flags :: [Flag DynP]
1469 ------- Packages ----------------------------------------------------
1470 Flag "package-conf" (HasArg extraPkgConf_) Supported
1471 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1473 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1474 , Flag "package" (HasArg exposePackage) Supported
1475 , Flag "hide-package" (HasArg hidePackage) Supported
1476 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1478 , Flag "ignore-package" (HasArg ignorePackage)
1480 , Flag "syslib" (HasArg exposePackage)
1481 (Deprecated "Use -package instead")
1484 mkFlag :: Bool -- ^ True <=> it should be turned on
1485 -> String -- ^ The flag prefix
1486 -> (DynFlag -> DynP ())
1487 -> (String, DynFlag, Bool -> Deprecated)
1489 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1490 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1492 deprecatedForLanguage :: String -> Bool -> Deprecated
1493 deprecatedForLanguage lang turn_on
1494 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1496 flag | turn_on = lang
1497 | otherwise = "No"++lang
1499 useInstead :: String -> Bool -> Deprecated
1500 useInstead flag turn_on
1501 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1503 no = if turn_on then "" else "no-"
1505 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1506 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1508 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1509 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1510 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1511 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1512 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1513 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1514 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1515 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1516 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1517 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1518 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1519 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1520 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1521 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1522 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1523 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1524 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1525 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1526 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1527 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1528 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1529 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1530 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1531 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1532 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1533 ( "strictness", Opt_Strictness, const Supported ),
1534 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1535 ( "full-laziness", Opt_FullLaziness, const Supported ),
1536 ( "liberate-case", Opt_LiberateCase, const Supported ),
1537 ( "spec-constr", Opt_SpecConstr, const Supported ),
1538 ( "cse", Opt_CSE, const Supported ),
1539 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1540 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1541 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1542 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1543 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1544 ( "case-merge", Opt_CaseMerge, const Supported ),
1545 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1546 ( "method-sharing", Opt_MethodSharing, const Supported ),
1547 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1548 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1549 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1550 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1551 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1552 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1553 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1554 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1555 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1556 ( "break-on-error", Opt_BreakOnError, const Supported ),
1557 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1558 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1559 ( "run-cps", Opt_RunCPSZ, const Supported ),
1560 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1561 ( "vectorise", Opt_Vectorise, const Supported ),
1562 ( "regs-graph", Opt_RegsGraph, const Supported ),
1563 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1564 ( "th", Opt_TemplateHaskell,
1565 deprecatedForLanguage "TemplateHaskell" ),
1566 ( "fi", Opt_ForeignFunctionInterface,
1567 deprecatedForLanguage "ForeignFunctionInterface" ),
1568 ( "ffi", Opt_ForeignFunctionInterface,
1569 deprecatedForLanguage "ForeignFunctionInterface" ),
1570 ( "arrows", Opt_Arrows,
1571 deprecatedForLanguage "Arrows" ),
1572 ( "generics", Opt_Generics,
1573 deprecatedForLanguage "Generics" ),
1574 ( "implicit-prelude", Opt_ImplicitPrelude,
1575 deprecatedForLanguage "ImplicitPrelude" ),
1576 ( "bang-patterns", Opt_BangPatterns,
1577 deprecatedForLanguage "BangPatterns" ),
1578 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1579 deprecatedForLanguage "MonomorphismRestriction" ),
1580 ( "mono-pat-binds", Opt_MonoPatBinds,
1581 deprecatedForLanguage "MonoPatBinds" ),
1582 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1583 deprecatedForLanguage "ExtendedDefaultRules" ),
1584 ( "implicit-params", Opt_ImplicitParams,
1585 deprecatedForLanguage "ImplicitParams" ),
1586 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1587 deprecatedForLanguage "ScopedTypeVariables" ),
1589 deprecatedForLanguage "PArr" ),
1590 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1591 deprecatedForLanguage "OverlappingInstances" ),
1592 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1593 deprecatedForLanguage "UndecidableInstances" ),
1594 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1595 deprecatedForLanguage "IncoherentInstances" ),
1596 ( "gen-manifest", Opt_GenManifest, const Supported ),
1597 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1598 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1601 supportedLanguages :: [String]
1602 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1604 -- This may contain duplicates
1605 languageOptions :: [DynFlag]
1606 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1608 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1609 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1611 ( "CPP", Opt_Cpp, const Supported ),
1612 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1613 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1614 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1615 ( "MagicHash", Opt_MagicHash, const Supported ),
1616 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1617 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1618 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1619 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1620 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1621 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1622 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1623 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1624 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1625 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1626 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1627 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1628 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1629 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1630 ( "Arrows", Opt_Arrows, const Supported ),
1631 ( "PArr", Opt_PArr, const Supported ),
1632 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1633 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1634 ( "Generics", Opt_Generics, const Supported ),
1636 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1637 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1638 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1639 ( "RecordPuns", Opt_RecordPuns,
1640 deprecatedForLanguage "NamedFieldPuns" ),
1641 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1642 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1643 ( "GADTs", Opt_GADTs, const Supported ),
1644 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1645 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1646 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1648 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1649 -- On by default (which is not strictly H98):
1650 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1651 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1652 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1653 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1654 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1656 ( "PatternSignatures", Opt_ScopedTypeVariables,
1657 deprecatedForLanguage "ScopedTypeVariables" ),
1659 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1660 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1661 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1662 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1663 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1664 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1665 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1666 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1667 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1668 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1669 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1670 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1671 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1672 ( "PackageImports", Opt_PackageImports, const Supported ),
1673 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1676 impliedFlags :: [(DynFlag, DynFlag)]
1678 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1679 -- be completely rigid for GADTs
1681 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1682 -- Note [Scoped tyvars] in TcBinds
1685 glasgowExtsFlags :: [DynFlag]
1686 glasgowExtsFlags = [
1687 Opt_PrintExplicitForalls
1688 , Opt_ForeignFunctionInterface
1689 , Opt_UnliftedFFITypes
1691 , Opt_ImplicitParams
1692 , Opt_ScopedTypeVariables
1694 , Opt_TypeSynonymInstances
1695 , Opt_StandaloneDeriving
1696 , Opt_DeriveDataTypeable
1697 , Opt_FlexibleContexts
1698 , Opt_FlexibleInstances
1699 , Opt_ConstrainedClassMethods
1700 , Opt_MultiParamTypeClasses
1701 , Opt_FunctionalDependencies
1703 , Opt_PolymorphicComponents
1704 , Opt_ExistentialQuantification
1706 , Opt_PostfixOperators
1708 , Opt_LiberalTypeSynonyms
1710 , Opt_ImpredicativeTypes
1713 , Opt_ParallelListComp
1714 , Opt_EmptyDataDecls
1715 , Opt_KindSignatures
1716 , Opt_GeneralizedNewtypeDeriving
1717 , Opt_TypeFamilies ]
1719 -- -----------------------------------------------------------------------------
1720 -- Parsing the dynamic flags.
1722 -- | Parse dynamic flags from a list of command line arguments. Returns the
1723 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1724 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1725 -- flags or missing arguments).
1726 parseDynamicFlags :: Monad m =>
1727 DynFlags -> [Located String]
1728 -> m (DynFlags, [Located String], [Located String])
1729 -- ^ Updated 'DynFlags', left-over arguments, and
1730 -- list of warnings.
1731 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1733 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1734 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1735 parseDynamicNoPackageFlags :: Monad m =>
1736 DynFlags -> [Located String]
1737 -> m (DynFlags, [Located String], [Located String])
1738 -- ^ Updated 'DynFlags', left-over arguments, and
1739 -- list of warnings.
1740 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1742 parseDynamicFlags_ :: Monad m =>
1743 DynFlags -> [Located String] -> Bool
1744 -> m (DynFlags, [Located String], [Located String])
1745 parseDynamicFlags_ dflags args pkg_flags = do
1746 -- XXX Legacy support code
1747 -- We used to accept things like
1748 -- optdep-f -optdepdepend
1749 -- optdep-f -optdep depend
1750 -- optdep -f -optdepdepend
1751 -- optdep -f -optdep depend
1752 -- but the spaces trip up proper argument handling. So get rid of them.
1753 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1754 f (x : xs) = x : f xs
1758 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1759 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1760 | otherwise = dynamic_flags
1762 let ((leftover, errs, warns), dflags')
1763 = runCmdLine (processArgs flag_spec args') dflags
1764 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1765 return (dflags', leftover, warns)
1767 type DynP = CmdLineP DynFlags
1769 upd :: (DynFlags -> DynFlags) -> DynP ()
1771 dfs <- getCmdLineState
1772 putCmdLineState $! (f dfs)
1774 --------------------------
1775 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1776 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1777 ; mapM_ setDynFlag deps }
1779 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1780 -- When you set f, set the ones it implies
1781 -- NB: use setDynFlag recursively, in case the implied flags
1782 -- implies further flags
1783 -- When you un-set f, however, we don't un-set the things it implies
1784 -- (except for -fno-glasgow-exts, which is treated specially)
1786 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1788 --------------------------
1789 setDumpFlag :: DynFlag -> OptKind DynP
1790 setDumpFlag dump_flag
1791 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1793 -- Certain dumpy-things are really interested in what's going
1794 -- on during recompilation checking, so in those cases we
1795 -- don't want to turn it off.
1796 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1797 Opt_D_dump_hi_diffs]
1799 forceRecompile :: DynP ()
1800 -- Whenver we -ddump, force recompilation (by switching off the
1801 -- recompilation checker), else you don't see the dump! However,
1802 -- don't switch it off in --make mode, else *everything* gets
1803 -- recompiled which probably isn't what you want
1804 forceRecompile = do { dfs <- getCmdLineState
1805 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1807 force_recomp dfs = isOneShot (ghcMode dfs)
1809 setVerboseCore2Core :: DynP ()
1810 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1812 upd (\s -> s { shouldDumpSimplPhase = const True })
1814 setDumpSimplPhases :: String -> DynP ()
1815 setDumpSimplPhases s = do forceRecompile
1816 upd (\s -> s { shouldDumpSimplPhase = spec })
1818 spec :: SimplifierMode -> Bool
1820 . map (join (&&) . map match . split ':')
1826 join :: (Bool -> Bool -> Bool)
1827 -> [SimplifierMode -> Bool]
1828 -> SimplifierMode -> Bool
1829 join _ [] = const True
1830 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1832 match :: String -> SimplifierMode -> Bool
1833 match "" = const True
1834 match s = case reads s of
1835 [(n,"")] -> phase_num n
1838 phase_num :: Int -> SimplifierMode -> Bool
1839 phase_num n (SimplPhase k _) = n == k
1840 phase_num _ _ = False
1842 phase_name :: String -> SimplifierMode -> Bool
1843 phase_name s SimplGently = s == "gentle"
1844 phase_name s (SimplPhase _ ss) = s `elem` ss
1846 setVerbosity :: Maybe Int -> DynP ()
1847 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1849 addCmdlineHCInclude :: String -> DynP ()
1850 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1852 extraPkgConf_ :: FilePath -> DynP ()
1853 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1855 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1857 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1859 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1861 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1863 setPackageName :: String -> DynFlags -> DynFlags
1865 | Nothing <- unpackPackageId pid
1866 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1868 = \s -> s{ thisPackage = pid }
1870 pid = stringToPackageId p
1872 -- If we're linking a binary, then only targets that produce object
1873 -- code are allowed (requests for other target types are ignored).
1874 setTarget :: HscTarget -> DynP ()
1875 setTarget l = upd set
1878 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1881 -- Changes the target only if we're compiling object code. This is
1882 -- used by -fasm and -fvia-C, which switch from one to the other, but
1883 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1884 -- can be safely used in an OPTIONS_GHC pragma.
1885 setObjTarget :: HscTarget -> DynP ()
1886 setObjTarget l = upd set
1889 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1892 setOptLevel :: Int -> DynFlags -> DynFlags
1893 setOptLevel n dflags
1894 | hscTarget dflags == HscInterpreted && n > 0
1896 -- not in IO any more, oh well:
1897 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1899 = updOptLevel n dflags
1902 -- -Odph is equivalent to
1904 -- -O2 optimise as much as possible
1905 -- -fno-method-sharing sharing specialisation defeats fusion
1907 -- -fdicts-cheap always inline dictionaries
1908 -- -fmax-simplifier-iterations20 this is necessary sometimes
1909 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1910 -- -fno-spec-constr-count SpecConstr as much as possible
1912 setDPHOpt :: DynFlags -> DynFlags
1913 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1914 , specConstrThreshold = Nothing
1915 , specConstrCount = Nothing
1917 `dopt_set` Opt_DictsCheap
1918 `dopt_unset` Opt_MethodSharing
1920 data DPHBackend = DPHPar
1923 deriving(Eq, Ord, Enum, Show)
1925 setDPHBackend :: DPHBackend -> DynP ()
1926 setDPHBackend backend
1928 upd $ \dflags -> dflags { dphBackend = backend }
1929 mapM_ exposePackage (dph_packages backend)
1931 dph_packages DPHThis = []
1932 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1933 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1935 dphPackage :: DynFlags -> PackageId
1936 dphPackage dflags = case dphBackend dflags of
1937 DPHPar -> dphParPackageId
1938 DPHSeq -> dphSeqPackageId
1939 DPHThis -> thisPackage dflags
1941 setMainIs :: String -> DynP ()
1943 | not (null main_fn) && isLower (head main_fn)
1944 -- The arg looked like "Foo.Bar.baz"
1945 = upd $ \d -> d{ mainFunIs = Just main_fn,
1946 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1948 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1949 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1951 | otherwise -- The arg looked like "baz"
1952 = upd $ \d -> d{ mainFunIs = Just arg }
1954 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1956 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1957 -- Either returns the default name or the one configured on the command line with -main-is
1958 getMainFun :: DynFlags -> RdrName
1959 getMainFun dflags = case (mainFunIs dflags) of
1960 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1961 Nothing -> main_RDR_Unqual
1963 -----------------------------------------------------------------------------
1964 -- Paths & Libraries
1966 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1968 -- -i on its own deletes the import paths
1969 addImportPath "" = upd (\s -> s{importPaths = []})
1970 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1974 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1977 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1979 addFrameworkPath p =
1980 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1982 #ifndef mingw32_TARGET_OS
1983 split_marker :: Char
1984 split_marker = ':' -- not configurable (ToDo)
1987 splitPathList :: String -> [String]
1988 splitPathList s = filter notNull (splitUp s)
1989 -- empty paths are ignored: there might be a trailing
1990 -- ':' in the initial list, for example. Empty paths can
1991 -- cause confusion when they are translated into -I options
1992 -- for passing to gcc.
1994 #ifndef mingw32_TARGET_OS
1995 splitUp xs = split split_marker xs
1997 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1999 -- That is, if "foo:bar:baz" is used, this interpreted as
2000 -- consisting of three entries, 'foo', 'bar', 'baz'.
2001 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2002 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2004 -- Notice that no attempt is made to fully replace the 'standard'
2005 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2006 -- that this will cause too much breakage for users & ':' will
2007 -- work fine even with DOS paths, if you're not insisting on being silly.
2010 splitUp (x:':':div:xs) | div `elem` dir_markers
2011 = ((x:':':div:p): splitUp rs)
2013 (p,rs) = findNextPath xs
2014 -- we used to check for existence of the path here, but that
2015 -- required the IO monad to be threaded through the command-line
2016 -- parser which is quite inconvenient. The
2017 splitUp xs = cons p (splitUp rs)
2019 (p,rs) = findNextPath xs
2024 -- will be called either when we've consumed nought or the
2025 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2026 -- finding the next split marker.
2028 case break (`elem` split_markers) xs of
2029 (p, _:ds) -> (p, ds)
2032 split_markers :: [Char]
2033 split_markers = [':', ';']
2035 dir_markers :: [Char]
2036 dir_markers = ['/', '\\']
2039 -- -----------------------------------------------------------------------------
2040 -- tmpDir, where we store temporary files.
2042 setTmpDir :: FilePath -> DynFlags -> DynFlags
2043 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2044 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2045 -- seem necessary now --SDM 7/2/2008
2047 -----------------------------------------------------------------------------
2050 setOptHpcDir :: String -> DynP ()
2051 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2053 -----------------------------------------------------------------------------
2054 -- Via-C compilation stuff
2056 -- There are some options that we need to pass to gcc when compiling
2057 -- Haskell code via C, but are only supported by recent versions of
2058 -- gcc. The configure script decides which of these options we need,
2059 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2060 -- read before each via-C compilation. The advantage of having these
2061 -- in a separate file is that the file can be created at install-time
2062 -- depending on the available gcc version, and even re-generated later
2063 -- if gcc is upgraded.
2065 -- The options below are not dependent on the version of gcc, only the
2068 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2069 [String]) -- for registerised HC compilations
2070 machdepCCOpts _dflags
2071 #if alpha_TARGET_ARCH
2073 #ifdef HAVE_THREADED_RTS_SUPPORT
2077 -- For now, to suppress the gcc warning "call-clobbered
2078 -- register used for global register variable", we simply
2079 -- disable all warnings altogether using the -w flag. Oh well.
2081 #elif hppa_TARGET_ARCH
2082 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2083 -- (very nice, but too bad the HP /usr/include files don't agree.)
2084 = ( ["-D_HPUX_SOURCE"], [] )
2086 #elif m68k_TARGET_ARCH
2087 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2088 -- popping of args to routines to be explicit; if we let things
2089 -- be deferred 'til after an STGJUMP, imminent death is certain!
2091 -- -fomit-frame-pointer : *don't*
2092 -- It's better to have a6 completely tied up being a frame pointer
2093 -- rather than let GCC pick random things to do with it.
2094 -- (If we want to steal a6, then we would try to do things
2095 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2096 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2098 #elif i386_TARGET_ARCH
2099 -- -fno-defer-pop : basically the same game as for m68k
2101 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2102 -- the fp (%ebp) for our register maps.
2103 = let n_regs = stolen_x86_regs _dflags
2106 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2109 "-fomit-frame-pointer",
2110 -- we want -fno-builtin, because when gcc inlines
2111 -- built-in functions like memcpy() it tends to
2112 -- run out of registers, requiring -monly-n-regs
2114 "-DSTOLEN_X86_REGS="++show n_regs ]
2117 #elif ia64_TARGET_ARCH
2118 = ( [], ["-fomit-frame-pointer", "-G0"] )
2120 #elif x86_64_TARGET_ARCH
2121 = ( [], ["-fomit-frame-pointer",
2122 "-fno-asynchronous-unwind-tables",
2123 -- the unwind tables are unnecessary for HC code,
2124 -- and get in the way of -split-objs. Another option
2125 -- would be to throw them away in the mangler, but this
2128 -- calling builtins like strlen() using the FFI can
2129 -- cause gcc to run out of regs, so use the external
2133 #elif sparc_TARGET_ARCH
2135 -- For now, to suppress the gcc warning "call-clobbered
2136 -- register used for global register variable", we simply
2137 -- disable all warnings altogether using the -w flag. Oh well.
2139 #elif powerpc_apple_darwin_TARGET
2141 -- Disable Apple's precompiling preprocessor. It's a great thing
2142 -- for "normal" programs, but it doesn't support register variable
2144 = ( [], ["-no-cpp-precomp"] )
2149 picCCOpts :: DynFlags -> [String]
2151 #if darwin_TARGET_OS
2152 -- Apple prefers to do things the other way round.
2153 -- PIC is on by default.
2154 -- -mdynamic-no-pic:
2155 -- Turn off PIC code generation.
2157 -- Don't generate "common" symbols - these are unwanted
2158 -- in dynamic libraries.
2161 = ["-fno-common", "-D__PIC__"]
2163 = ["-mdynamic-no-pic"]
2164 #elif mingw32_TARGET_OS
2165 -- no -fPIC for Windows
2172 = ["-fPIC", "-D__PIC__"]
2177 -- -----------------------------------------------------------------------------
2181 can_split = cSplitObjs == "YES"
2183 -- -----------------------------------------------------------------------------
2186 compilerInfo :: [(String, String)]
2187 compilerInfo = [("Project name", cProjectName),
2188 ("Project version", cProjectVersion),
2189 ("Booter version", cBooterVersion),
2191 ("Interface file version", cHscIfaceFileVersion),
2192 ("Have interpreter", cGhcWithInterpreter),
2193 ("Object splitting", cSplitObjs),
2194 ("Have native code generator", cGhcWithNativeCodeGen),
2195 ("Support SMP", cGhcWithSMP),
2196 ("Unregisterised", cGhcUnregisterised),
2197 ("Tables next to code", cGhcEnableTablesNextToCode),
2198 ("Win32 DLLs", cEnableWin32DLLs),
2199 ("RTS ways", cGhcRTSWays),
2200 ("Leading underscore", cLeadingUnderscore),
2201 ("Debug on", show debugIsOn)