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 Data.List ( intersperse )
95 import System.FilePath
96 import System.IO ( stderr, hPutChar )
98 -- -----------------------------------------------------------------------------
101 -- | Enumerates the simple on-or-off dynamic flags
107 | Opt_D_dump_cmmz_pretty
111 | Opt_D_dump_asm_native
112 | Opt_D_dump_asm_liveness
113 | Opt_D_dump_asm_coalesce
114 | Opt_D_dump_asm_regalloc
115 | Opt_D_dump_asm_regalloc_stages
116 | Opt_D_dump_asm_conflicts
117 | Opt_D_dump_asm_stats
123 | Opt_D_dump_inlinings
124 | Opt_D_dump_rule_firings
125 | Opt_D_dump_occur_anal
129 | Opt_D_dump_simpl_iterations
130 | Opt_D_dump_simpl_phases
139 | Opt_D_dump_worker_wrapper
140 | Opt_D_dump_rn_trace
141 | Opt_D_dump_rn_stats
143 | Opt_D_dump_simpl_stats
144 | Opt_D_dump_tc_trace
145 | Opt_D_dump_if_trace
152 | Opt_D_verbose_core2core
153 | Opt_D_verbose_stg2stg
155 | Opt_D_dump_hi_diffs
156 | Opt_D_dump_minimal_imports
157 | Opt_D_dump_mod_cycles
158 | Opt_D_dump_view_pattern_commoning
159 | Opt_D_faststring_stats
160 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
161 | Opt_D_no_debug_output
167 | Opt_WarnIsError -- -Werror; makes warnings fatal
168 | Opt_WarnDuplicateExports
170 | Opt_WarnImplicitPrelude
171 | Opt_WarnIncompletePatterns
172 | Opt_WarnIncompletePatternsRecUpd
173 | Opt_WarnMissingFields
174 | Opt_WarnMissingMethods
175 | Opt_WarnMissingSigs
176 | Opt_WarnNameShadowing
177 | Opt_WarnOverlappingPatterns
178 | Opt_WarnSimplePatterns
179 | Opt_WarnTypeDefaults
180 | Opt_WarnMonomorphism
181 | Opt_WarnUnusedBinds
182 | Opt_WarnUnusedImports
183 | Opt_WarnUnusedMatches
184 | Opt_WarnWarningsDeprecations
185 | Opt_WarnDeprecatedFlags
186 | Opt_WarnDodgyImports
189 | Opt_WarnUnrecognisedPragmas
190 | Opt_WarnDodgyForeignImports
193 | Opt_OverlappingInstances
194 | Opt_UndecidableInstances
195 | Opt_IncoherentInstances
196 | Opt_MonomorphismRestriction
198 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
199 | Opt_ForeignFunctionInterface
200 | Opt_UnliftedFFITypes
201 | Opt_PArr -- Syntactic support for parallel arrays
202 | Opt_Arrows -- Arrow-notation syntax
203 | Opt_TemplateHaskell
206 | Opt_Generics -- "Derivable type classes"
207 | Opt_ImplicitPrelude
208 | Opt_ScopedTypeVariables
212 | Opt_OverloadedStrings
213 | Opt_DisambiguateRecordFields
214 | Opt_RecordWildCards
219 | Opt_StandaloneDeriving
220 | Opt_DeriveDataTypeable
221 | Opt_TypeSynonymInstances
222 | Opt_FlexibleContexts
223 | Opt_FlexibleInstances
224 | Opt_ConstrainedClassMethods
225 | Opt_MultiParamTypeClasses
226 | Opt_FunctionalDependencies
228 | Opt_PolymorphicComponents
229 | Opt_ExistentialQuantification
233 | Opt_ParallelListComp
234 | Opt_TransformListComp
235 | Opt_GeneralizedNewtypeDeriving
237 | Opt_PostfixOperators
239 | Opt_LiberalTypeSynonyms
242 | Opt_ImpredicativeTypes
245 | Opt_NewQualifiedOperators
247 | Opt_PrintExplicitForalls
252 | Opt_StaticArgumentTransformation
256 | Opt_IgnoreInterfacePragmas
257 | Opt_OmitInterfacePragmas
258 | Opt_DoLambdaEtaExpansion
262 | Opt_UnboxStrictFields
265 | Opt_InlineIfEnoughArgs
266 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
268 | Opt_RegsGraph -- do graph coloring register allocation
269 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
277 | Opt_ExcessPrecision
278 | Opt_EagerBlackHoling
279 | Opt_ReadUserPackageConf
283 | Opt_HideAllPackages
284 | Opt_PrintBindResult
288 | Opt_BreakOnException
290 | Opt_PrintEvldWithShow
291 | Opt_PrintBindContents
298 | Opt_ConvertToZipCfgAndBack
299 | Opt_AutoLinkPackages
300 | Opt_ImplicitImportQualified
309 | Opt_KeepRawTokenStream
313 -- | Contains not only a collection of 'DynFlag's but also a plethora of
314 -- information relating to the compilation of a single file or GHC session
315 data DynFlags = DynFlags {
318 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
319 stgToDo :: Maybe [StgToDo], -- similarly
320 hscTarget :: HscTarget,
321 hscOutName :: String, -- ^ Name of the output file
322 extCoreName :: String, -- ^ Name of the .hcr output file
323 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
324 optLevel :: Int, -- ^ Optimisation level
325 simplPhases :: Int, -- ^ Number of simplifier phases
326 maxSimplIterations :: Int, -- ^ Max simplifier iterations
327 shouldDumpSimplPhase :: SimplifierMode -> Bool,
328 ruleCheck :: Maybe String,
330 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
331 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
332 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
334 stolen_x86_regs :: Int,
335 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
336 importPaths :: [FilePath],
338 mainFunIs :: Maybe String,
339 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
341 dphBackend :: DPHBackend,
343 thisPackage :: PackageId, -- ^ name of package currently being compiled
346 wayNames :: [WayName], -- ^ Way flags from the command line
347 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
348 rtsBuildTag :: String, -- ^ The RTS \"way\"
351 objectDir :: Maybe String,
352 hiDir :: Maybe String,
353 stubDir :: Maybe String,
359 outputFile :: Maybe String,
360 outputHi :: Maybe String,
361 dynLibLoader :: DynLibLoader,
363 -- | This is set by 'DriverPipeline.runPipeline' based on where
364 -- its output is going.
365 dumpPrefix :: Maybe FilePath,
367 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
368 -- Set by @-ddump-file-prefix@
369 dumpPrefixForce :: Maybe FilePath,
371 includePaths :: [String],
372 libraryPaths :: [String],
373 frameworkPaths :: [String], -- used on darwin only
374 cmdlineFrameworks :: [String], -- ditto
375 tmpDir :: String, -- no trailing '/'
377 ghcUsagePath :: FilePath, -- Filled in by SysTools
378 ghciUsagePath :: FilePath, -- ditto
380 hpcDir :: String, -- ^ Path to store the .mix files
382 -- options for particular phases
390 opt_windres :: [String],
392 -- commands for particular phases
394 pgm_P :: (String,[Option]),
396 pgm_c :: (String,[Option]),
397 pgm_m :: (String,[Option]),
398 pgm_s :: (String,[Option]),
399 pgm_a :: (String,[Option]),
400 pgm_l :: (String,[Option]),
401 pgm_dll :: (String,[Option]),
403 pgm_sysman :: String,
404 pgm_windres :: String,
407 depMakefile :: FilePath,
408 depIncludePkgDeps :: Bool,
409 depExcludeMods :: [ModuleName],
410 depSuffixes :: [String],
413 extraPkgConfs :: [FilePath],
414 topDir :: FilePath, -- filled in by SysTools
415 systemPackageConfig :: FilePath, -- ditto
416 -- ^ The @-package-conf@ flags given on the command line, in the order
419 packageFlags :: [PackageFlag],
420 -- ^ The @-package@ and @-hide-package@ flags from the command-line
423 -- NB. do not modify this field, it is calculated by
424 -- Packages.initPackages and Packages.updatePackages.
425 pkgDatabase :: Maybe (UniqFM PackageConfig),
426 pkgState :: PackageState,
431 -- | Message output action: use "ErrUtils" instead of this if you can
432 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
434 haddockOptions :: Maybe String
437 -- | The target code type of the compilation (if any).
439 -- 'HscNothing' can be used to avoid generating any output, however, note
442 -- * This will not run the desugaring step, thus no warnings generated in
443 -- this step will be output. In particular, this includes warnings
444 -- related to pattern matching.
446 -- * At the moment switching from 'HscNothing' to 'HscInterpreted' without
447 -- unloading first is not safe. To unload use
448 -- @GHC.setTargets [] >> GHC.load LoadAllTargets@.
458 -- | Will this target result in an object file on the disk?
459 isObjectTarget :: HscTarget -> Bool
460 isObjectTarget HscC = True
461 isObjectTarget HscAsm = True
462 isObjectTarget _ = False
464 -- | The 'GhcMode' tells us whether we're doing multi-module
465 -- compilation (controlled via the "GHC" API) or one-shot
466 -- (single-module) compilation. This makes a difference primarily to
467 -- the "Finder": in one-shot mode we look for interface files for
468 -- imported modules, but in multi-module mode we look for source files
469 -- in order to check whether they need to be recompiled.
471 = CompManager -- ^ @\-\-make@, GHCi, etc.
472 | OneShot -- ^ @ghc -c Foo.hs@
473 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
476 instance Outputable GhcMode where
477 ppr CompManager = ptext (sLit "CompManager")
478 ppr OneShot = ptext (sLit "OneShot")
479 ppr MkDepend = ptext (sLit "MkDepend")
481 isOneShot :: GhcMode -> Bool
482 isOneShot OneShot = True
483 isOneShot _other = False
485 -- | What to do in the link step, if there is one.
487 = NoLink -- ^ Don't link at all
488 | LinkBinary -- ^ Link object code into a binary
489 | LinkInMemory -- ^ Use the in-memory dynamic linker
490 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
493 isNoLink :: GhcLink -> Bool
494 isNoLink NoLink = True
498 = ExposePackage String
500 | IgnorePackage String
503 defaultHscTarget :: HscTarget
504 defaultHscTarget = defaultObjectTarget
506 -- | The 'HscTarget' value corresponding to the default way to create
507 -- object files on the current platform.
508 defaultObjectTarget :: HscTarget
510 | cGhcWithNativeCodeGen == "YES" = HscAsm
515 | Wrapped (Maybe String)
519 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
520 initDynFlags :: DynFlags -> IO DynFlags
521 initDynFlags dflags = do
522 -- someday these will be dynamic flags
523 ways <- readIORef v_Ways
524 build_tag <- readIORef v_Build_tag
525 rts_build_tag <- readIORef v_RTS_Build_tag
528 buildTag = build_tag,
529 rtsBuildTag = rts_build_tag
532 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
533 -- and must be fully initialized by 'GHC.newSession' first.
534 defaultDynFlags :: DynFlags
537 ghcMode = CompManager,
538 ghcLink = LinkBinary,
541 hscTarget = defaultHscTarget,
547 maxSimplIterations = 4,
548 shouldDumpSimplPhase = const False,
550 specConstrThreshold = Just 200,
551 specConstrCount = Just 3,
552 liberateCaseThreshold = Just 200,
554 cmdlineHcIncludes = [],
558 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
562 thisPackage = mainPackageId,
568 objectSuf = phaseInputExt StopLn,
569 hcSuf = phaseInputExt HCc,
572 outputFile = Nothing,
574 dynLibLoader = Deployable,
575 dumpPrefix = Nothing,
576 dumpPrefixForce = Nothing,
580 cmdlineFrameworks = [],
581 tmpDir = cDEFAULT_TMPDIR,
587 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
598 pkgDatabase = Nothing,
599 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
600 wayNames = panic "defaultDynFlags: No wayNames",
601 buildTag = panic "defaultDynFlags: No buildTag",
602 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
603 -- initSysTools fills all these in
604 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
605 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
606 topDir = panic "defaultDynFlags: No topDir",
607 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
608 pgm_L = panic "defaultDynFlags: No pgm_L",
609 pgm_P = panic "defaultDynFlags: No pgm_P",
610 pgm_F = panic "defaultDynFlags: No pgm_F",
611 pgm_c = panic "defaultDynFlags: No pgm_c",
612 pgm_m = panic "defaultDynFlags: No pgm_m",
613 pgm_s = panic "defaultDynFlags: No pgm_s",
614 pgm_a = panic "defaultDynFlags: No pgm_a",
615 pgm_l = panic "defaultDynFlags: No pgm_l",
616 pgm_dll = panic "defaultDynFlags: No pgm_dll",
617 pgm_T = panic "defaultDynFlags: No pgm_T",
618 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
619 pgm_windres = panic "defaultDynFlags: No pgm_windres",
620 -- end of initSysTools values
622 depMakefile = "Makefile",
623 depIncludePkgDeps = False,
626 -- end of ghc -M values
627 haddockOptions = Nothing,
629 Opt_AutoLinkPackages,
630 Opt_ReadUserPackageConf,
632 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
633 -- behaviour the default, to see if anyone notices
637 Opt_MonomorphismRestriction,
645 Opt_PrintBindContents
647 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
648 -- The default -O0 options
651 log_action = \severity srcSpan style msg ->
653 SevInfo -> printErrs (msg style)
654 SevFatal -> printErrs (msg style)
657 printErrs ((mkLocMessage srcSpan msg) style)
658 -- careful (#2302): printErrs prints in UTF-8, whereas
659 -- converting to string first and using hPutStr would
660 -- just emit the low 8 bits of each unicode char.
667 0 | print errors & warnings only
668 1 | minimal verbosity: print "compiling M ... done." for each module.
669 2 | equivalent to -dshow-passes
670 3 | equivalent to existing "ghc -v"
671 4 | "ghc -v -ddump-most"
672 5 | "ghc -v -ddump-all"
675 -- | Test whether a 'DynFlag' is set
676 dopt :: DynFlag -> DynFlags -> Bool
677 dopt f dflags = f `elem` (flags dflags)
680 dopt_set :: DynFlags -> DynFlag -> DynFlags
681 dopt_set dfs f = dfs{ flags = f : flags dfs }
683 -- | Unset a 'DynFlag'
684 dopt_unset :: DynFlags -> DynFlag -> DynFlags
685 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
687 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
688 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
689 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
690 -> [a] -- ^ Correctly ordered extracted options
691 getOpts dflags opts = reverse (opts dflags)
692 -- We add to the options from the front, so we need to reverse the list
694 -- | Gets the verbosity flag for the current verbosity level. This is fed to
695 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
696 getVerbFlag :: DynFlags -> String
698 | verbosity dflags >= 3 = "-v"
701 setObjectDir, setHiDir, setStubDir, setOutputDir,
702 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
703 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
704 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
705 addCmdlineFramework, addHaddockOpts
706 :: String -> DynFlags -> DynFlags
707 setOutputFile, setOutputHi, setDumpPrefixForce
708 :: Maybe String -> DynFlags -> DynFlags
710 setObjectDir f d = d{ objectDir = Just f}
711 setHiDir f d = d{ hiDir = Just f}
712 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
713 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
714 -- \#included from the .hc file when compiling with -fvia-C.
715 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
717 setObjectSuf f d = d{ objectSuf = f}
718 setHiSuf f d = d{ hiSuf = f}
719 setHcSuf f d = d{ hcSuf = f}
721 setOutputFile f d = d{ outputFile = f}
722 setOutputHi f d = d{ outputHi = f}
724 parseDynLibLoaderMode f d =
726 ("deploy", "") -> d{ dynLibLoader = Deployable }
727 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
728 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
729 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
730 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
731 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
733 setDumpPrefixForce f d = d { dumpPrefixForce = f}
735 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
736 -- Config.hs should really use Option.
737 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
739 setPgmL f d = d{ pgm_L = f}
740 setPgmF f d = d{ pgm_F = f}
741 setPgmc f d = d{ pgm_c = (f,[])}
742 setPgmm f d = d{ pgm_m = (f,[])}
743 setPgms f d = d{ pgm_s = (f,[])}
744 setPgma f d = d{ pgm_a = (f,[])}
745 setPgml f d = d{ pgm_l = (f,[])}
746 setPgmdll f d = d{ pgm_dll = (f,[])}
747 setPgmwindres f d = d{ pgm_windres = f}
749 addOptL f d = d{ opt_L = f : opt_L d}
750 addOptP f d = d{ opt_P = f : opt_P d}
751 addOptF f d = d{ opt_F = f : opt_F d}
752 addOptc f d = d{ opt_c = f : opt_c d}
753 addOptm f d = d{ opt_m = f : opt_m d}
754 addOpta f d = d{ opt_a = f : opt_a d}
755 addOptl f d = d{ opt_l = f : opt_l d}
756 addOptwindres f d = d{ opt_windres = f : opt_windres d}
758 setDepMakefile :: FilePath -> DynFlags -> DynFlags
759 setDepMakefile f d = d { depMakefile = deOptDep f }
761 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
762 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
764 addDepExcludeMod :: String -> DynFlags -> DynFlags
766 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
768 addDepSuffix :: FilePath -> DynFlags -> DynFlags
769 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
772 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
773 -- we need to strip the "-optdep" off of the arg
774 deOptDep :: String -> String
775 deOptDep x = case maybePrefixMatch "-optdep" x of
779 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
781 addHaddockOpts f d = d{ haddockOptions = Just f}
783 -- -----------------------------------------------------------------------------
784 -- Command-line options
786 -- | When invoking external tools as part of the compilation pipeline, we
787 -- pass these a sequence of options on the command-line. Rather than
788 -- just using a list of Strings, we use a type that allows us to distinguish
789 -- between filepaths and 'other stuff'. The reason for this is that
790 -- this type gives us a handle on transforming filenames, and filenames only,
791 -- to whatever format they're expected to be on a particular platform.
793 = FileOption -- an entry that _contains_ filename(s) / filepaths.
794 String -- a non-filepath prefix that shouldn't be
795 -- transformed (e.g., "/out=")
796 String -- the filepath/filename portion
799 -----------------------------------------------------------------------------
800 -- Setting the optimisation level
802 updOptLevel :: Int -> DynFlags -> DynFlags
803 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
805 = dfs2{ optLevel = final_n }
807 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
808 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
809 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
811 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
812 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
814 optLevelFlags :: [([Int], DynFlag)]
816 = [ ([0], Opt_IgnoreInterfacePragmas)
817 , ([0], Opt_OmitInterfacePragmas)
819 , ([1,2], Opt_IgnoreAsserts)
820 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
822 , ([1,2], Opt_DoEtaReduction)
823 , ([1,2], Opt_CaseMerge)
824 , ([1,2], Opt_Strictness)
826 , ([1,2], Opt_FullLaziness)
828 , ([2], Opt_LiberateCase)
829 , ([2], Opt_SpecConstr)
831 -- , ([2], Opt_StaticArgumentTransformation)
832 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
833 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
834 -- several improvements to the heuristics, and I'm concerned that without
835 -- those changes SAT will interfere with some attempts to write "high
836 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
837 -- this year. In particular, the version in HEAD lacks the tail call
838 -- criterion, so many things that look like reasonable loops will be
839 -- turned into functions with extra (unneccesary) thunk creation.
841 , ([0,1,2], Opt_DoLambdaEtaExpansion)
842 -- This one is important for a tiresome reason:
843 -- we want to make sure that the bindings for data
844 -- constructors are eta-expanded. This is probably
845 -- a good thing anyway, but it seems fragile.
848 -- -----------------------------------------------------------------------------
849 -- Standard sets of warning options
851 standardWarnings :: [DynFlag]
853 = [ Opt_WarnWarningsDeprecations,
854 Opt_WarnDeprecatedFlags,
855 Opt_WarnUnrecognisedPragmas,
856 Opt_WarnOverlappingPatterns,
857 Opt_WarnMissingFields,
858 Opt_WarnMissingMethods,
859 Opt_WarnDuplicateExports,
860 Opt_WarnDodgyForeignImports
863 minusWOpts :: [DynFlag]
865 = standardWarnings ++
866 [ Opt_WarnUnusedBinds,
867 Opt_WarnUnusedMatches,
868 Opt_WarnUnusedImports,
869 Opt_WarnIncompletePatterns,
873 minusWallOpts :: [DynFlag]
876 [ Opt_WarnTypeDefaults,
877 Opt_WarnNameShadowing,
883 -- minuswRemovesOpts should be every warning option
884 minuswRemovesOpts :: [DynFlag]
887 [Opt_WarnImplicitPrelude,
888 Opt_WarnIncompletePatternsRecUpd,
889 Opt_WarnSimplePatterns,
890 Opt_WarnMonomorphism,
891 Opt_WarnUnrecognisedPragmas,
895 -- -----------------------------------------------------------------------------
896 -- CoreToDo: abstraction of core-to-core passes to run.
898 data CoreToDo -- These are diff core-to-core passes,
899 -- which may be invoked in any order,
900 -- as many times as you like.
902 = CoreDoSimplify -- The core-to-core simplifier.
905 -- Each run of the simplifier can take a different
906 -- set of simplifier-specific flags.
908 | CoreDoFloatOutwards FloatOutSwitches
913 | CoreDoWorkerWrapper
916 | CoreDoOldStrictness
919 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
920 -- matching this string
921 | CoreDoVectorisation PackageId
922 | CoreDoNothing -- Useful when building up
923 | CoreDoPasses [CoreToDo] -- lists of these things
926 data SimplifierMode -- See comments in SimplMonad
928 | SimplPhase Int [String]
930 instance Outputable SimplifierMode where
931 ppr SimplGently = ptext (sLit "gentle")
932 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
935 data SimplifierSwitch
936 = MaxSimplifierIterations Int
940 data FloatOutSwitches = FloatOutSwitches {
941 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
942 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
943 -- even if they do not escape a lambda
946 instance Outputable FloatOutSwitches where
947 ppr = pprFloatOutSwitches
949 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
950 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
951 <+> pp_not (floatOutConstants sw) <+> text "constants"
954 pp_not False = text "not"
956 -- | Switches that specify the minimum amount of floating out
957 gentleFloatOutSwitches :: FloatOutSwitches
958 gentleFloatOutSwitches = FloatOutSwitches False False
960 -- | Switches that do not specify floating out of lambdas, just of constants
961 constantsOnlyFloatOutSwitches :: FloatOutSwitches
962 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
965 -- The core-to-core pass ordering is derived from the DynFlags:
966 runWhen :: Bool -> CoreToDo -> CoreToDo
967 runWhen True do_this = do_this
968 runWhen False _ = CoreDoNothing
970 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
971 runMaybe (Just x) f = f x
972 runMaybe Nothing _ = CoreDoNothing
974 getCoreToDo :: DynFlags -> [CoreToDo]
976 | Just todo <- coreToDo dflags = todo -- set explicitly by user
977 | otherwise = core_todo
979 opt_level = optLevel dflags
980 phases = simplPhases dflags
981 max_iter = maxSimplIterations dflags
982 strictness = dopt Opt_Strictness dflags
983 full_laziness = dopt Opt_FullLaziness dflags
984 cse = dopt Opt_CSE dflags
985 spec_constr = dopt Opt_SpecConstr dflags
986 liberate_case = dopt Opt_LiberateCase dflags
987 rule_check = ruleCheck dflags
988 static_args = dopt Opt_StaticArgumentTransformation dflags
990 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
992 simpl_phase phase names iter
994 [ CoreDoSimplify (SimplPhase phase names) [
995 MaxSimplifierIterations iter
997 maybe_rule_check phase
1001 = runWhen (dopt Opt_Vectorise dflags)
1002 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1005 -- By default, we have 2 phases before phase 0.
1007 -- Want to run with inline phase 2 after the specialiser to give
1008 -- maximum chance for fusion to work before we inline build/augment
1009 -- in phase 1. This made a difference in 'ansi' where an
1010 -- overloaded function wasn't inlined till too late.
1012 -- Need phase 1 so that build/augment get
1013 -- inlined. I found that spectral/hartel/genfft lost some useful
1014 -- strictness in the function sumcode' if augment is not inlined
1015 -- before strictness analysis runs
1016 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1017 | phase <- [phases, phases-1 .. 1] ]
1020 -- initial simplify: mk specialiser happy: minimum effort please
1021 simpl_gently = CoreDoSimplify SimplGently [
1022 -- Simplify "gently"
1023 -- Don't inline anything till full laziness has bitten
1024 -- In particular, inlining wrappers inhibits floating
1025 -- e.g. ...(case f x of ...)...
1026 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1027 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1028 -- and now the redex (f x) isn't floatable any more
1029 -- Similarly, don't apply any rules until after full
1030 -- laziness. Notably, list fusion can prevent floating.
1032 NoCaseOfCase, -- Don't do case-of-case transformations.
1033 -- This makes full laziness work better
1034 MaxSimplifierIterations max_iter
1038 if opt_level == 0 then
1040 simpl_phase 0 ["final"] max_iter]
1041 else {- opt_level >= 1 -} [
1043 -- We want to do the static argument transform before full laziness as it
1044 -- may expose extra opportunities to float things outwards. However, to fix
1045 -- up the output of the transformation we need at do at least one simplify
1046 -- after this before anything else
1047 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1049 -- We run vectorisation here for now, but we might also try to run
1053 -- initial simplify: mk specialiser happy: minimum effort please
1056 -- Specialisation is best done before full laziness
1057 -- so that overloaded functions have all their dictionary lambdas manifest
1060 runWhen full_laziness (CoreDoFloatOutwards gentleFloatOutSwitches),
1066 -- Phase 0: allow all Ids to be inlined now
1067 -- This gets foldr inlined before strictness analysis
1069 -- At least 3 iterations because otherwise we land up with
1070 -- huge dead expressions because of an infelicity in the
1072 -- let k = BIG in foldr k z xs
1073 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1074 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1076 simpl_phase 0 ["main"] (max max_iter 3),
1079 #ifdef OLD_STRICTNESS
1080 CoreDoOldStrictness,
1082 runWhen strictness (CoreDoPasses [
1084 CoreDoWorkerWrapper,
1086 simpl_phase 0 ["post-worker-wrapper"] max_iter
1089 runWhen full_laziness
1090 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1091 -- nofib/spectral/hartel/wang doubles in speed if you
1092 -- do full laziness late in the day. It only happens
1093 -- after fusion and other stuff, so the early pass doesn't
1094 -- catch it. For the record, the redex is
1095 -- f_el22 (f_el21 r_midblock)
1098 runWhen cse CoreCSE,
1099 -- We want CSE to follow the final full-laziness pass, because it may
1100 -- succeed in commoning up things floated out by full laziness.
1101 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1107 -- Case-liberation for -O2. This should be after
1108 -- strictness analysis and the simplification which follows it.
1109 runWhen liberate_case (CoreDoPasses [
1111 simpl_phase 0 ["post-liberate-case"] max_iter
1112 ]), -- Run the simplifier after LiberateCase to vastly
1113 -- reduce the possiblility of shadowing
1114 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1116 runWhen spec_constr CoreDoSpecConstr,
1120 -- Final clean-up simplification:
1121 simpl_phase 0 ["final"] max_iter
1124 -- -----------------------------------------------------------------------------
1125 -- StgToDo: abstraction of stg-to-stg passes to run.
1128 = StgDoMassageForProfiling -- should be (next to) last
1129 -- There's also setStgVarInfo, but its absolute "lastness"
1130 -- is so critical that it is hardwired in (no flag).
1133 getStgToDo :: DynFlags -> [StgToDo]
1135 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1138 stg_stats = dopt Opt_StgStats dflags
1140 todo1 = if stg_stats then [D_stg_stats] else []
1142 todo2 | WayProf `elem` wayNames dflags
1143 = StgDoMassageForProfiling : todo1
1147 -- -----------------------------------------------------------------------------
1150 allFlags :: [String]
1151 allFlags = map ('-':) $
1152 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1153 map ("fno-"++) flags ++
1154 map ("f"++) flags ++
1155 map ("X"++) supportedLanguages ++
1156 map ("XNo"++) supportedLanguages
1157 where ok (PrefixPred _ _) = False
1159 flags = [ name | (name, _, _) <- fFlags ]
1161 dynamic_flags :: [Flag DynP]
1163 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1164 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1165 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1166 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1167 , Flag "v" (OptIntSuffix setVerbosity) Supported
1169 ------- Specific phases --------------------------------------------
1170 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1171 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1172 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1173 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1174 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1175 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1176 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1177 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1178 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1179 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1181 , Flag "optL" (HasArg (upd . addOptL)) Supported
1182 , Flag "optP" (HasArg (upd . addOptP)) Supported
1183 , Flag "optF" (HasArg (upd . addOptF)) Supported
1184 , Flag "optc" (HasArg (upd . addOptc)) Supported
1185 , Flag "optm" (HasArg (upd . addOptm)) Supported
1186 , Flag "opta" (HasArg (upd . addOpta)) Supported
1187 , Flag "optl" (HasArg (upd . addOptl)) Supported
1188 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1191 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1194 -------- ghc -M -----------------------------------------------------
1195 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1196 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1197 (Deprecated "Use -dep-suffix instead")
1198 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1199 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1200 (Deprecated "Use -dep-makefile instead")
1201 , Flag "optdep-w" (NoArg (return ()))
1202 (Deprecated "-optdep-w doesn't do anything")
1203 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1204 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1205 (Deprecated "Use -include-pkg-deps instead")
1206 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1207 (Deprecated "Use -include-pkg-deps instead")
1208 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1209 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1210 (Deprecated "Use -exclude-module instead")
1211 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1212 (Deprecated "Use -exclude-module instead")
1214 -------- Linking ----------------------------------------------------
1215 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1217 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1218 (Deprecated "Use -c instead")
1219 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1221 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1224 ------- Libraries ---------------------------------------------------
1225 , Flag "L" (Prefix addLibraryPath ) Supported
1226 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1228 ------- Frameworks --------------------------------------------------
1229 -- -framework-path should really be -F ...
1230 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1231 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1233 ------- Output Redirection ------------------------------------------
1234 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1235 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1236 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1237 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1238 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1239 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1240 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1241 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1242 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1243 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1244 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1247 ------- Keeping temporary files -------------------------------------
1248 -- These can be singular (think ghc -c) or plural (think ghc --make)
1249 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1250 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1251 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1252 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1253 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1254 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1255 -- This only makes sense as plural
1256 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1258 ------- Miscellaneous ----------------------------------------------
1259 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1260 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1261 , Flag "main-is" (SepArg setMainIs ) Supported
1262 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1263 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1264 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1266 ------- recompilation checker --------------------------------------
1267 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1268 (Deprecated "Use -fno-force-recomp instead")
1269 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1270 (Deprecated "Use -fforce-recomp instead")
1272 ------ HsCpp opts ---------------------------------------------------
1273 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1274 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1276 ------- Include/Import Paths ----------------------------------------
1277 , Flag "I" (Prefix addIncludePath) Supported
1278 , Flag "i" (OptPrefix addImportPath ) Supported
1280 ------ Debugging ----------------------------------------------------
1281 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1283 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1285 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1287 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1289 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1291 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1293 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1295 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1297 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1299 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1301 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1303 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1305 , Flag "ddump-asm-regalloc-stages"
1306 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1308 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1310 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1312 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1314 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1316 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1318 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1320 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1322 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1324 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1326 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1328 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1330 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1332 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1334 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1336 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1338 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1340 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1342 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1344 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1346 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1348 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1350 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1352 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1354 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1356 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1358 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1360 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1362 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1364 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1366 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1368 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1370 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1372 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1374 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1376 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1378 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1380 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1382 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1384 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1386 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1388 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1390 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1392 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1395 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1397 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1399 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1401 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1403 , Flag "dshow-passes"
1404 (NoArg (do forceRecompile
1405 setVerbosity (Just 2)))
1407 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1410 ------ Machine dependant (-m<blah>) stuff ---------------------------
1412 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1414 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1416 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1419 ------ Warning opts -------------------------------------------------
1420 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1422 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1424 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1426 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1428 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1429 (Deprecated "Use -w instead")
1430 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1433 ------ Optimisation flags ------------------------------------------
1434 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1435 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1436 (Deprecated "Use -O0 instead")
1437 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1438 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1440 -- If the number is missing, use 1
1442 , Flag "fsimplifier-phases"
1443 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1445 , Flag "fmax-simplifier-iterations"
1446 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1449 , Flag "fspec-constr-threshold"
1450 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1452 , Flag "fno-spec-constr-threshold"
1453 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1455 , Flag "fspec-constr-count"
1456 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1458 , Flag "fno-spec-constr-count"
1459 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1461 , Flag "fliberate-case-threshold"
1462 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1464 , Flag "fno-liberate-case-threshold"
1465 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1468 , Flag "frule-check"
1469 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1471 , Flag "fcontext-stack"
1472 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1475 ------ DPH flags ----------------------------------------------------
1478 (NoArg (setDPHBackend DPHSeq))
1481 (NoArg (setDPHBackend DPHPar))
1484 (NoArg (setDPHBackend DPHThis))
1487 ------ Compiler flags -----------------------------------------------
1489 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1490 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1491 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1493 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1494 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1495 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1497 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1499 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1502 ++ map (mkFlag True "f" setDynFlag ) fFlags
1503 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1504 ++ map (mkFlag True "X" setDynFlag ) xFlags
1505 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1507 package_flags :: [Flag DynP]
1509 ------- Packages ----------------------------------------------------
1510 Flag "package-conf" (HasArg extraPkgConf_) Supported
1511 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1513 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1514 , Flag "package" (HasArg exposePackage) Supported
1515 , Flag "hide-package" (HasArg hidePackage) Supported
1516 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1518 , Flag "ignore-package" (HasArg ignorePackage)
1520 , Flag "syslib" (HasArg exposePackage)
1521 (Deprecated "Use -package instead")
1524 mkFlag :: Bool -- ^ True <=> it should be turned on
1525 -> String -- ^ The flag prefix
1526 -> (DynFlag -> DynP ())
1527 -> (String, DynFlag, Bool -> Deprecated)
1529 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1530 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1532 deprecatedForLanguage :: String -> Bool -> Deprecated
1533 deprecatedForLanguage lang turn_on
1534 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1536 flag | turn_on = lang
1537 | otherwise = "No"++lang
1539 useInstead :: String -> Bool -> Deprecated
1540 useInstead flag turn_on
1541 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1543 no = if turn_on then "" else "no-"
1545 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1546 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1548 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1549 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1550 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1551 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1552 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1553 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1554 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1555 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1556 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1557 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1558 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1559 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1560 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1561 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1562 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1563 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1564 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1565 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1566 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1567 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1568 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1569 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1570 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1571 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1572 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1573 ( "strictness", Opt_Strictness, const Supported ),
1574 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1575 ( "full-laziness", Opt_FullLaziness, const Supported ),
1576 ( "liberate-case", Opt_LiberateCase, const Supported ),
1577 ( "spec-constr", Opt_SpecConstr, const Supported ),
1578 ( "cse", Opt_CSE, const Supported ),
1579 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1580 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1581 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1582 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1583 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1584 ( "case-merge", Opt_CaseMerge, const Supported ),
1585 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1586 ( "method-sharing", Opt_MethodSharing, const Supported ),
1587 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1588 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1589 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1590 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1591 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1592 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1593 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1594 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1595 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1596 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1597 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1598 ( "break-on-error", Opt_BreakOnError, const Supported ),
1599 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1600 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1601 ( "run-cps", Opt_RunCPS, const Supported ),
1602 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1603 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1604 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1605 ( "vectorise", Opt_Vectorise, const Supported ),
1606 ( "regs-graph", Opt_RegsGraph, const Supported ),
1607 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1608 ( "th", Opt_TemplateHaskell,
1609 deprecatedForLanguage "TemplateHaskell" ),
1610 ( "fi", Opt_ForeignFunctionInterface,
1611 deprecatedForLanguage "ForeignFunctionInterface" ),
1612 ( "ffi", Opt_ForeignFunctionInterface,
1613 deprecatedForLanguage "ForeignFunctionInterface" ),
1614 ( "arrows", Opt_Arrows,
1615 deprecatedForLanguage "Arrows" ),
1616 ( "generics", Opt_Generics,
1617 deprecatedForLanguage "Generics" ),
1618 ( "implicit-prelude", Opt_ImplicitPrelude,
1619 deprecatedForLanguage "ImplicitPrelude" ),
1620 ( "bang-patterns", Opt_BangPatterns,
1621 deprecatedForLanguage "BangPatterns" ),
1622 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1623 deprecatedForLanguage "MonomorphismRestriction" ),
1624 ( "mono-pat-binds", Opt_MonoPatBinds,
1625 deprecatedForLanguage "MonoPatBinds" ),
1626 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1627 deprecatedForLanguage "ExtendedDefaultRules" ),
1628 ( "implicit-params", Opt_ImplicitParams,
1629 deprecatedForLanguage "ImplicitParams" ),
1630 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1631 deprecatedForLanguage "ScopedTypeVariables" ),
1633 deprecatedForLanguage "PArr" ),
1634 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1635 deprecatedForLanguage "OverlappingInstances" ),
1636 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1637 deprecatedForLanguage "UndecidableInstances" ),
1638 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1639 deprecatedForLanguage "IncoherentInstances" ),
1640 ( "gen-manifest", Opt_GenManifest, const Supported ),
1641 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1642 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1645 supportedLanguages :: [String]
1646 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1648 -- This may contain duplicates
1649 languageOptions :: [DynFlag]
1650 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1652 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1653 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1655 ( "CPP", Opt_Cpp, const Supported ),
1656 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1657 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1658 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1659 ( "MagicHash", Opt_MagicHash, const Supported ),
1660 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1661 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1662 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1663 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1664 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1665 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1666 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1667 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1668 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1669 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1670 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1671 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1672 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1673 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1674 ( "Arrows", Opt_Arrows, const Supported ),
1675 ( "PArr", Opt_PArr, const Supported ),
1676 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1677 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1678 ( "Generics", Opt_Generics, const Supported ),
1680 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1681 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1682 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1683 ( "RecordPuns", Opt_RecordPuns,
1684 deprecatedForLanguage "NamedFieldPuns" ),
1685 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1686 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1687 ( "GADTs", Opt_GADTs, const Supported ),
1688 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1689 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1690 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1692 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1693 -- On by default (which is not strictly H98):
1694 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1695 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1696 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1697 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1698 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1700 ( "PatternSignatures", Opt_ScopedTypeVariables,
1701 deprecatedForLanguage "ScopedTypeVariables" ),
1703 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1704 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1705 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1706 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1707 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1708 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1709 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1710 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1711 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1712 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1713 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1714 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1715 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1716 ( "PackageImports", Opt_PackageImports, const Supported ),
1717 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1720 impliedFlags :: [(DynFlag, DynFlag)]
1722 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1723 -- be completely rigid for GADTs
1725 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1726 -- Note [Scoped tyvars] in TcBinds
1729 glasgowExtsFlags :: [DynFlag]
1730 glasgowExtsFlags = [
1731 Opt_PrintExplicitForalls
1732 , Opt_ForeignFunctionInterface
1733 , Opt_UnliftedFFITypes
1735 , Opt_ImplicitParams
1736 , Opt_ScopedTypeVariables
1738 , Opt_TypeSynonymInstances
1739 , Opt_StandaloneDeriving
1740 , Opt_DeriveDataTypeable
1741 , Opt_FlexibleContexts
1742 , Opt_FlexibleInstances
1743 , Opt_ConstrainedClassMethods
1744 , Opt_MultiParamTypeClasses
1745 , Opt_FunctionalDependencies
1747 , Opt_PolymorphicComponents
1748 , Opt_ExistentialQuantification
1750 , Opt_PostfixOperators
1752 , Opt_LiberalTypeSynonyms
1754 , Opt_ImpredicativeTypes
1757 , Opt_ParallelListComp
1758 , Opt_EmptyDataDecls
1759 , Opt_KindSignatures
1760 , Opt_GeneralizedNewtypeDeriving
1761 , Opt_TypeFamilies ]
1763 -- -----------------------------------------------------------------------------
1764 -- Parsing the dynamic flags.
1766 -- | Parse dynamic flags from a list of command line arguments. Returns the
1767 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1768 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1769 -- flags or missing arguments).
1770 parseDynamicFlags :: Monad m =>
1771 DynFlags -> [Located String]
1772 -> m (DynFlags, [Located String], [Located String])
1773 -- ^ Updated 'DynFlags', left-over arguments, and
1774 -- list of warnings.
1775 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1777 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1778 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1779 parseDynamicNoPackageFlags :: Monad m =>
1780 DynFlags -> [Located String]
1781 -> m (DynFlags, [Located String], [Located String])
1782 -- ^ Updated 'DynFlags', left-over arguments, and
1783 -- list of warnings.
1784 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1786 parseDynamicFlags_ :: Monad m =>
1787 DynFlags -> [Located String] -> Bool
1788 -> m (DynFlags, [Located String], [Located String])
1789 parseDynamicFlags_ dflags args pkg_flags = do
1790 -- XXX Legacy support code
1791 -- We used to accept things like
1792 -- optdep-f -optdepdepend
1793 -- optdep-f -optdep depend
1794 -- optdep -f -optdepdepend
1795 -- optdep -f -optdep depend
1796 -- but the spaces trip up proper argument handling. So get rid of them.
1797 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1798 f (x : xs) = x : f xs
1802 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1803 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1804 | otherwise = dynamic_flags
1806 let ((leftover, errs, warns), dflags')
1807 = runCmdLine (processArgs flag_spec args') dflags
1808 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1809 return (dflags', leftover, warns)
1811 type DynP = CmdLineP DynFlags
1813 upd :: (DynFlags -> DynFlags) -> DynP ()
1815 dfs <- getCmdLineState
1816 putCmdLineState $! (f dfs)
1818 --------------------------
1819 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1820 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1821 ; mapM_ setDynFlag deps }
1823 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1824 -- When you set f, set the ones it implies
1825 -- NB: use setDynFlag recursively, in case the implied flags
1826 -- implies further flags
1827 -- When you un-set f, however, we don't un-set the things it implies
1828 -- (except for -fno-glasgow-exts, which is treated specially)
1830 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1832 --------------------------
1833 setDumpFlag :: DynFlag -> OptKind DynP
1834 setDumpFlag dump_flag
1835 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1837 -- Certain dumpy-things are really interested in what's going
1838 -- on during recompilation checking, so in those cases we
1839 -- don't want to turn it off.
1840 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1841 Opt_D_dump_hi_diffs]
1843 forceRecompile :: DynP ()
1844 -- Whenver we -ddump, force recompilation (by switching off the
1845 -- recompilation checker), else you don't see the dump! However,
1846 -- don't switch it off in --make mode, else *everything* gets
1847 -- recompiled which probably isn't what you want
1848 forceRecompile = do { dfs <- getCmdLineState
1849 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1851 force_recomp dfs = isOneShot (ghcMode dfs)
1853 setVerboseCore2Core :: DynP ()
1854 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1856 upd (\s -> s { shouldDumpSimplPhase = const True })
1858 setDumpSimplPhases :: String -> DynP ()
1859 setDumpSimplPhases s = do forceRecompile
1860 upd (\s -> s { shouldDumpSimplPhase = spec })
1862 spec :: SimplifierMode -> Bool
1864 . map (join (&&) . map match . split ':')
1870 join :: (Bool -> Bool -> Bool)
1871 -> [SimplifierMode -> Bool]
1872 -> SimplifierMode -> Bool
1873 join _ [] = const True
1874 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1876 match :: String -> SimplifierMode -> Bool
1877 match "" = const True
1878 match s = case reads s of
1879 [(n,"")] -> phase_num n
1882 phase_num :: Int -> SimplifierMode -> Bool
1883 phase_num n (SimplPhase k _) = n == k
1884 phase_num _ _ = False
1886 phase_name :: String -> SimplifierMode -> Bool
1887 phase_name s SimplGently = s == "gentle"
1888 phase_name s (SimplPhase _ ss) = s `elem` ss
1890 setVerbosity :: Maybe Int -> DynP ()
1891 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1893 addCmdlineHCInclude :: String -> DynP ()
1894 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1896 extraPkgConf_ :: FilePath -> DynP ()
1897 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1899 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1901 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1903 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1905 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1907 setPackageName :: String -> DynFlags -> DynFlags
1909 | Nothing <- unpackPackageId pid
1910 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1912 = \s -> s{ thisPackage = pid }
1914 pid = stringToPackageId p
1916 -- If we're linking a binary, then only targets that produce object
1917 -- code are allowed (requests for other target types are ignored).
1918 setTarget :: HscTarget -> DynP ()
1919 setTarget l = upd set
1922 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1925 -- Changes the target only if we're compiling object code. This is
1926 -- used by -fasm and -fvia-C, which switch from one to the other, but
1927 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1928 -- can be safely used in an OPTIONS_GHC pragma.
1929 setObjTarget :: HscTarget -> DynP ()
1930 setObjTarget l = upd set
1933 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1936 setOptLevel :: Int -> DynFlags -> DynFlags
1937 setOptLevel n dflags
1938 | hscTarget dflags == HscInterpreted && n > 0
1940 -- not in IO any more, oh well:
1941 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1943 = updOptLevel n dflags
1946 -- -Odph is equivalent to
1948 -- -O2 optimise as much as possible
1949 -- -fno-method-sharing sharing specialisation defeats fusion
1951 -- -fdicts-cheap always inline dictionaries
1952 -- -fmax-simplifier-iterations20 this is necessary sometimes
1953 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1954 -- -fno-spec-constr-count SpecConstr as much as possible
1955 -- -finline-enough-args hack to prevent excessive inlining
1957 setDPHOpt :: DynFlags -> DynFlags
1958 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1959 , specConstrThreshold = Nothing
1960 , specConstrCount = Nothing
1962 `dopt_set` Opt_DictsCheap
1963 `dopt_unset` Opt_MethodSharing
1964 `dopt_set` Opt_InlineIfEnoughArgs
1966 data DPHBackend = DPHPar
1969 deriving(Eq, Ord, Enum, Show)
1971 setDPHBackend :: DPHBackend -> DynP ()
1972 setDPHBackend backend
1974 upd $ \dflags -> dflags { dphBackend = backend }
1975 mapM_ exposePackage (dph_packages backend)
1977 dph_packages DPHThis = []
1978 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
1979 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
1981 dphPackage :: DynFlags -> PackageId
1982 dphPackage dflags = case dphBackend dflags of
1983 DPHPar -> dphParPackageId
1984 DPHSeq -> dphSeqPackageId
1985 DPHThis -> thisPackage dflags
1987 setMainIs :: String -> DynP ()
1989 | not (null main_fn) && isLower (head main_fn)
1990 -- The arg looked like "Foo.Bar.baz"
1991 = upd $ \d -> d{ mainFunIs = Just main_fn,
1992 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1994 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1995 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1997 | otherwise -- The arg looked like "baz"
1998 = upd $ \d -> d{ mainFunIs = Just arg }
2000 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2002 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
2003 -- Either returns the default name or the one configured on the command line with -main-is
2004 getMainFun :: DynFlags -> RdrName
2005 getMainFun dflags = case (mainFunIs dflags) of
2006 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
2007 Nothing -> main_RDR_Unqual
2009 -----------------------------------------------------------------------------
2010 -- Paths & Libraries
2012 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2014 -- -i on its own deletes the import paths
2015 addImportPath "" = upd (\s -> s{importPaths = []})
2016 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2020 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2023 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2025 addFrameworkPath p =
2026 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2028 #ifndef mingw32_TARGET_OS
2029 split_marker :: Char
2030 split_marker = ':' -- not configurable (ToDo)
2033 splitPathList :: String -> [String]
2034 splitPathList s = filter notNull (splitUp s)
2035 -- empty paths are ignored: there might be a trailing
2036 -- ':' in the initial list, for example. Empty paths can
2037 -- cause confusion when they are translated into -I options
2038 -- for passing to gcc.
2040 #ifndef mingw32_TARGET_OS
2041 splitUp xs = split split_marker xs
2043 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2045 -- That is, if "foo:bar:baz" is used, this interpreted as
2046 -- consisting of three entries, 'foo', 'bar', 'baz'.
2047 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2048 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2050 -- Notice that no attempt is made to fully replace the 'standard'
2051 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2052 -- that this will cause too much breakage for users & ':' will
2053 -- work fine even with DOS paths, if you're not insisting on being silly.
2056 splitUp (x:':':div:xs) | div `elem` dir_markers
2057 = ((x:':':div:p): splitUp rs)
2059 (p,rs) = findNextPath xs
2060 -- we used to check for existence of the path here, but that
2061 -- required the IO monad to be threaded through the command-line
2062 -- parser which is quite inconvenient. The
2063 splitUp xs = cons p (splitUp rs)
2065 (p,rs) = findNextPath xs
2070 -- will be called either when we've consumed nought or the
2071 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2072 -- finding the next split marker.
2074 case break (`elem` split_markers) xs of
2075 (p, _:ds) -> (p, ds)
2078 split_markers :: [Char]
2079 split_markers = [':', ';']
2081 dir_markers :: [Char]
2082 dir_markers = ['/', '\\']
2085 -- -----------------------------------------------------------------------------
2086 -- tmpDir, where we store temporary files.
2088 setTmpDir :: FilePath -> DynFlags -> DynFlags
2089 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2090 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2091 -- seem necessary now --SDM 7/2/2008
2093 -----------------------------------------------------------------------------
2096 setOptHpcDir :: String -> DynP ()
2097 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2099 -----------------------------------------------------------------------------
2100 -- Via-C compilation stuff
2102 -- There are some options that we need to pass to gcc when compiling
2103 -- Haskell code via C, but are only supported by recent versions of
2104 -- gcc. The configure script decides which of these options we need,
2105 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2106 -- read before each via-C compilation. The advantage of having these
2107 -- in a separate file is that the file can be created at install-time
2108 -- depending on the available gcc version, and even re-generated later
2109 -- if gcc is upgraded.
2111 -- The options below are not dependent on the version of gcc, only the
2114 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2115 [String]) -- for registerised HC compilations
2116 machdepCCOpts _dflags
2117 #if alpha_TARGET_ARCH
2119 #ifdef HAVE_THREADED_RTS_SUPPORT
2123 -- For now, to suppress the gcc warning "call-clobbered
2124 -- register used for global register variable", we simply
2125 -- disable all warnings altogether using the -w flag. Oh well.
2127 #elif hppa_TARGET_ARCH
2128 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2129 -- (very nice, but too bad the HP /usr/include files don't agree.)
2130 = ( ["-D_HPUX_SOURCE"], [] )
2132 #elif m68k_TARGET_ARCH
2133 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2134 -- popping of args to routines to be explicit; if we let things
2135 -- be deferred 'til after an STGJUMP, imminent death is certain!
2137 -- -fomit-frame-pointer : *don't*
2138 -- It's better to have a6 completely tied up being a frame pointer
2139 -- rather than let GCC pick random things to do with it.
2140 -- (If we want to steal a6, then we would try to do things
2141 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2142 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2144 #elif i386_TARGET_ARCH
2145 -- -fno-defer-pop : basically the same game as for m68k
2147 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2148 -- the fp (%ebp) for our register maps.
2149 = let n_regs = stolen_x86_regs _dflags
2152 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2155 "-fomit-frame-pointer",
2156 -- we want -fno-builtin, because when gcc inlines
2157 -- built-in functions like memcpy() it tends to
2158 -- run out of registers, requiring -monly-n-regs
2160 "-DSTOLEN_X86_REGS="++show n_regs ]
2163 #elif ia64_TARGET_ARCH
2164 = ( [], ["-fomit-frame-pointer", "-G0"] )
2166 #elif x86_64_TARGET_ARCH
2167 = ( [], ["-fomit-frame-pointer",
2168 "-fno-asynchronous-unwind-tables",
2169 -- the unwind tables are unnecessary for HC code,
2170 -- and get in the way of -split-objs. Another option
2171 -- would be to throw them away in the mangler, but this
2174 -- calling builtins like strlen() using the FFI can
2175 -- cause gcc to run out of regs, so use the external
2179 #elif sparc_TARGET_ARCH
2181 -- For now, to suppress the gcc warning "call-clobbered
2182 -- register used for global register variable", we simply
2183 -- disable all warnings altogether using the -w flag. Oh well.
2185 #elif powerpc_apple_darwin_TARGET
2187 -- Disable Apple's precompiling preprocessor. It's a great thing
2188 -- for "normal" programs, but it doesn't support register variable
2190 = ( [], ["-no-cpp-precomp"] )
2195 picCCOpts :: DynFlags -> [String]
2197 #if darwin_TARGET_OS
2198 -- Apple prefers to do things the other way round.
2199 -- PIC is on by default.
2200 -- -mdynamic-no-pic:
2201 -- Turn off PIC code generation.
2203 -- Don't generate "common" symbols - these are unwanted
2204 -- in dynamic libraries.
2207 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2209 = ["-mdynamic-no-pic"]
2210 #elif mingw32_TARGET_OS
2211 -- no -fPIC for Windows
2213 = ["-U __PIC__","-D__PIC__"]
2218 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2223 -- -----------------------------------------------------------------------------
2227 can_split = cSplitObjs == "YES"
2229 -- -----------------------------------------------------------------------------
2232 compilerInfo :: [(String, String)]
2233 compilerInfo = [("Project name", cProjectName),
2234 ("Project version", cProjectVersion),
2235 ("Booter version", cBooterVersion),
2237 ("Interface file version", cHscIfaceFileVersion),
2238 ("Have interpreter", cGhcWithInterpreter),
2239 ("Object splitting", cSplitObjs),
2240 ("Have native code generator", cGhcWithNativeCodeGen),
2241 ("Support SMP", cGhcWithSMP),
2242 ("Unregisterised", cGhcUnregisterised),
2243 ("Tables next to code", cGhcEnableTablesNextToCode),
2244 ("Win32 DLLs", cEnableWin32DLLs),
2245 ("RTS ways", cGhcRTSWays),
2246 ("Leading underscore", cLeadingUnderscore),
2247 ("Debug on", show debugIsOn)