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"
66 #ifndef OMIT_NATIVE_CODEGEN
71 import PrelNames ( mAIN )
72 #if defined(i386_TARGET_ARCH) || (!defined(mingw32_TARGET_OS) && !defined(darwin_TARGET_OS))
73 import StaticFlags ( opt_Static )
75 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
77 import {-# SOURCE #-} Packages (PackageState)
78 import DriverPhases ( Phase(..), phaseInputExt )
81 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
83 import UniqFM ( UniqFM )
85 import Maybes ( orElse )
90 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
93 import Control.Monad ( when )
96 import Data.List ( intersperse )
97 import System.FilePath
98 import System.IO ( stderr, hPutChar )
100 -- -----------------------------------------------------------------------------
103 -- | Enumerates the simple on-or-off dynamic flags
109 | Opt_D_dump_cmmz_pretty
113 | Opt_D_dump_asm_native
114 | Opt_D_dump_asm_liveness
115 | Opt_D_dump_asm_coalesce
116 | Opt_D_dump_asm_regalloc
117 | Opt_D_dump_asm_regalloc_stages
118 | Opt_D_dump_asm_conflicts
119 | Opt_D_dump_asm_stats
120 | Opt_D_dump_asm_expanded
126 | Opt_D_dump_inlinings
127 | Opt_D_dump_rule_firings
128 | Opt_D_dump_occur_anal
132 | Opt_D_dump_simpl_iterations
133 | Opt_D_dump_simpl_phases
142 | Opt_D_dump_worker_wrapper
143 | Opt_D_dump_rn_trace
144 | Opt_D_dump_rn_stats
146 | Opt_D_dump_simpl_stats
147 | Opt_D_dump_tc_trace
148 | Opt_D_dump_if_trace
155 | Opt_D_verbose_core2core
156 | Opt_D_verbose_stg2stg
158 | Opt_D_dump_hi_diffs
159 | Opt_D_dump_minimal_imports
160 | Opt_D_dump_mod_cycles
161 | Opt_D_dump_view_pattern_commoning
162 | Opt_D_faststring_stats
163 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
164 | Opt_D_no_debug_output
170 | Opt_WarnIsError -- -Werror; makes warnings fatal
171 | Opt_WarnDuplicateExports
173 | Opt_WarnImplicitPrelude
174 | Opt_WarnIncompletePatterns
175 | Opt_WarnIncompletePatternsRecUpd
176 | Opt_WarnMissingFields
177 | Opt_WarnMissingMethods
178 | Opt_WarnMissingSigs
179 | Opt_WarnNameShadowing
180 | Opt_WarnOverlappingPatterns
181 | Opt_WarnSimplePatterns
182 | Opt_WarnTypeDefaults
183 | Opt_WarnMonomorphism
184 | Opt_WarnUnusedBinds
185 | Opt_WarnUnusedImports
186 | Opt_WarnUnusedMatches
187 | Opt_WarnWarningsDeprecations
188 | Opt_WarnDeprecatedFlags
189 | Opt_WarnDodgyImports
192 | Opt_WarnUnrecognisedPragmas
193 | Opt_WarnDodgyForeignImports
196 | Opt_OverlappingInstances
197 | Opt_UndecidableInstances
198 | Opt_IncoherentInstances
199 | Opt_MonomorphismRestriction
201 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
202 | Opt_ForeignFunctionInterface
203 | Opt_UnliftedFFITypes
204 | Opt_PArr -- Syntactic support for parallel arrays
205 | Opt_Arrows -- Arrow-notation syntax
206 | Opt_TemplateHaskell
209 | Opt_Generics -- "Derivable type classes"
210 | Opt_ImplicitPrelude
211 | Opt_ScopedTypeVariables
215 | Opt_OverloadedStrings
216 | Opt_DisambiguateRecordFields
217 | Opt_RecordWildCards
223 | Opt_StandaloneDeriving
224 | Opt_DeriveDataTypeable
226 | Opt_DeriveTraversable
229 | Opt_TypeSynonymInstances
230 | Opt_FlexibleContexts
231 | Opt_FlexibleInstances
232 | Opt_ConstrainedClassMethods
233 | Opt_MultiParamTypeClasses
234 | Opt_FunctionalDependencies
236 | Opt_PolymorphicComponents
237 | Opt_ExistentialQuantification
241 | Opt_ParallelListComp
242 | Opt_TransformListComp
243 | Opt_GeneralizedNewtypeDeriving
245 | Opt_PostfixOperators
247 | Opt_LiberalTypeSynonyms
250 | Opt_ImpredicativeTypes
253 | Opt_NewQualifiedOperators
255 | Opt_PrintExplicitForalls
260 | Opt_StaticArgumentTransformation
264 | Opt_IgnoreInterfacePragmas
265 | Opt_OmitInterfacePragmas
266 | Opt_DoLambdaEtaExpansion
270 | Opt_UnboxStrictFields
273 | Opt_InlineIfEnoughArgs
274 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
276 | Opt_RegsGraph -- do graph coloring register allocation
277 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
280 | Opt_AutoSccsOnAllToplevs
281 | Opt_AutoSccsOnExportedToplevs
282 | Opt_AutoSccsOnIndividualCafs
290 | Opt_ExcessPrecision
291 | Opt_EagerBlackHoling
292 | Opt_ReadUserPackageConf
296 | Opt_HideAllPackages
297 | Opt_PrintBindResult
301 | Opt_BreakOnException
303 | Opt_PrintEvldWithShow
304 | Opt_PrintBindContents
311 | Opt_ConvertToZipCfgAndBack
312 | Opt_AutoLinkPackages
313 | Opt_ImplicitImportQualified
322 | Opt_KeepRawTokenStream
326 -- | Contains not only a collection of 'DynFlag's but also a plethora of
327 -- information relating to the compilation of a single file or GHC session
328 data DynFlags = DynFlags {
331 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
332 stgToDo :: Maybe [StgToDo], -- similarly
333 hscTarget :: HscTarget,
334 hscOutName :: String, -- ^ Name of the output file
335 extCoreName :: String, -- ^ Name of the .hcr output file
336 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
337 optLevel :: Int, -- ^ Optimisation level
338 simplPhases :: Int, -- ^ Number of simplifier phases
339 maxSimplIterations :: Int, -- ^ Max simplifier iterations
340 shouldDumpSimplPhase :: SimplifierMode -> Bool,
341 ruleCheck :: Maybe String,
343 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
344 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
345 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
347 #ifndef OMIT_NATIVE_CODEGEN
348 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
350 stolen_x86_regs :: Int,
351 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
352 importPaths :: [FilePath],
354 mainFunIs :: Maybe String,
355 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
357 dphBackend :: DPHBackend,
359 thisPackage :: PackageId, -- ^ name of package currently being compiled
362 wayNames :: [WayName], -- ^ Way flags from the command line
363 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
364 rtsBuildTag :: String, -- ^ The RTS \"way\"
366 -- For object splitting
367 splitInfo :: Maybe (String,Int),
370 objectDir :: Maybe String,
371 hiDir :: Maybe String,
372 stubDir :: Maybe String,
378 outputFile :: Maybe String,
379 outputHi :: Maybe String,
380 dynLibLoader :: DynLibLoader,
382 -- | This is set by 'DriverPipeline.runPipeline' based on where
383 -- its output is going.
384 dumpPrefix :: Maybe FilePath,
386 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
387 -- Set by @-ddump-file-prefix@
388 dumpPrefixForce :: Maybe FilePath,
390 includePaths :: [String],
391 libraryPaths :: [String],
392 frameworkPaths :: [String], -- used on darwin only
393 cmdlineFrameworks :: [String], -- ditto
394 tmpDir :: String, -- no trailing '/'
396 ghcUsagePath :: FilePath, -- Filled in by SysTools
397 ghciUsagePath :: FilePath, -- ditto
399 hpcDir :: String, -- ^ Path to store the .mix files
401 -- options for particular phases
409 opt_windres :: [String],
411 -- commands for particular phases
413 pgm_P :: (String,[Option]),
415 pgm_c :: (String,[Option]),
416 pgm_m :: (String,[Option]),
417 pgm_s :: (String,[Option]),
418 pgm_a :: (String,[Option]),
419 pgm_l :: (String,[Option]),
420 pgm_dll :: (String,[Option]),
422 pgm_sysman :: String,
423 pgm_windres :: String,
426 depMakefile :: FilePath,
427 depIncludePkgDeps :: Bool,
428 depExcludeMods :: [ModuleName],
429 depSuffixes :: [String],
432 extraPkgConfs :: [FilePath],
433 topDir :: FilePath, -- filled in by SysTools
434 systemPackageConfig :: FilePath, -- ditto
435 -- ^ The @-package-conf@ flags given on the command line, in the order
438 packageFlags :: [PackageFlag],
439 -- ^ The @-package@ and @-hide-package@ flags from the command-line
442 -- NB. do not modify this field, it is calculated by
443 -- Packages.initPackages and Packages.updatePackages.
444 pkgDatabase :: Maybe (UniqFM PackageConfig),
445 pkgState :: PackageState,
448 -- These have to be IORefs, because the defaultCleanupHandler needs to
449 -- know what to clean when an exception happens
450 filesToClean :: IORef [FilePath],
451 dirsToClean :: IORef (FiniteMap FilePath FilePath),
456 -- | Message output action: use "ErrUtils" instead of this if you can
457 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
459 haddockOptions :: Maybe String
462 -- | The target code type of the compilation (if any).
464 -- Whenever you change the target, also make sure to set 'ghcLink' to
465 -- something sensible.
467 -- 'HscNothing' can be used to avoid generating any output, however, note
470 -- * This will not run the desugaring step, thus no warnings generated in
471 -- this step will be output. In particular, this includes warnings related
472 -- to pattern matching. You can run the desugarer manually using
473 -- 'GHC.desugarModule'.
475 -- * If a program uses Template Haskell the typechecker may try to run code
476 -- from an imported module. This will fail if no code has been generated
477 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
478 -- whether this might be the case and choose to either switch to a
479 -- different target or avoid typechecking such modules. (The latter may
480 -- preferable for security reasons.)
483 = HscC -- ^ Generate C code.
484 | HscAsm -- ^ Generate assembly using the native code generator.
485 | HscJava -- ^ Generate Java bytecode.
486 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
487 | HscNothing -- ^ Don't generate any code. See notes above.
490 -- | Will this target result in an object file on the disk?
491 isObjectTarget :: HscTarget -> Bool
492 isObjectTarget HscC = True
493 isObjectTarget HscAsm = True
494 isObjectTarget _ = False
496 -- | The 'GhcMode' tells us whether we're doing multi-module
497 -- compilation (controlled via the "GHC" API) or one-shot
498 -- (single-module) compilation. This makes a difference primarily to
499 -- the "Finder": in one-shot mode we look for interface files for
500 -- imported modules, but in multi-module mode we look for source files
501 -- in order to check whether they need to be recompiled.
503 = CompManager -- ^ @\-\-make@, GHCi, etc.
504 | OneShot -- ^ @ghc -c Foo.hs@
505 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
508 instance Outputable GhcMode where
509 ppr CompManager = ptext (sLit "CompManager")
510 ppr OneShot = ptext (sLit "OneShot")
511 ppr MkDepend = ptext (sLit "MkDepend")
513 isOneShot :: GhcMode -> Bool
514 isOneShot OneShot = True
515 isOneShot _other = False
517 -- | What to do in the link step, if there is one.
519 = NoLink -- ^ Don't link at all
520 | LinkBinary -- ^ Link object code into a binary
521 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
522 -- bytecode and object code).
523 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
526 isNoLink :: GhcLink -> Bool
527 isNoLink NoLink = True
530 -- Is it worth evaluating this Bool and caching it in the DynFlags value
531 -- during initDynFlags?
532 doingTickyProfiling :: DynFlags -> Bool
533 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
536 = ExposePackage String
538 | IgnorePackage String
541 defaultHscTarget :: HscTarget
542 defaultHscTarget = defaultObjectTarget
544 -- | The 'HscTarget' value corresponding to the default way to create
545 -- object files on the current platform.
546 defaultObjectTarget :: HscTarget
548 | cGhcWithNativeCodeGen == "YES" = HscAsm
553 | Wrapped (Maybe String)
557 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
558 initDynFlags :: DynFlags -> IO DynFlags
559 initDynFlags dflags = do
560 -- someday these will be dynamic flags
561 ways <- readIORef v_Ways
562 build_tag <- readIORef v_Build_tag
563 rts_build_tag <- readIORef v_RTS_Build_tag
564 refFilesToClean <- newIORef []
565 refDirsToClean <- newIORef emptyFM
568 buildTag = build_tag,
569 rtsBuildTag = rts_build_tag,
570 filesToClean = refFilesToClean,
571 dirsToClean = refDirsToClean
574 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
575 -- and must be fully initialized by 'GHC.newSession' first.
576 defaultDynFlags :: DynFlags
579 ghcMode = CompManager,
580 ghcLink = LinkBinary,
583 hscTarget = defaultHscTarget,
589 maxSimplIterations = 4,
590 shouldDumpSimplPhase = const False,
592 specConstrThreshold = Just 200,
593 specConstrCount = Just 3,
594 liberateCaseThreshold = Just 200,
595 #ifndef OMIT_NATIVE_CODEGEN
596 targetPlatform = defaultTargetPlatform,
599 cmdlineHcIncludes = [],
603 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
607 thisPackage = mainPackageId,
613 objectSuf = phaseInputExt StopLn,
614 hcSuf = phaseInputExt HCc,
617 outputFile = Nothing,
619 dynLibLoader = SystemDependent,
620 dumpPrefix = Nothing,
621 dumpPrefixForce = Nothing,
625 cmdlineFrameworks = [],
626 tmpDir = cDEFAULT_TMPDIR,
632 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
643 pkgDatabase = Nothing,
644 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
645 wayNames = panic "defaultDynFlags: No wayNames",
646 buildTag = panic "defaultDynFlags: No buildTag",
647 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
649 -- initSysTools fills all these in
650 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
651 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
652 topDir = panic "defaultDynFlags: No topDir",
653 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
654 pgm_L = panic "defaultDynFlags: No pgm_L",
655 pgm_P = panic "defaultDynFlags: No pgm_P",
656 pgm_F = panic "defaultDynFlags: No pgm_F",
657 pgm_c = panic "defaultDynFlags: No pgm_c",
658 pgm_m = panic "defaultDynFlags: No pgm_m",
659 pgm_s = panic "defaultDynFlags: No pgm_s",
660 pgm_a = panic "defaultDynFlags: No pgm_a",
661 pgm_l = panic "defaultDynFlags: No pgm_l",
662 pgm_dll = panic "defaultDynFlags: No pgm_dll",
663 pgm_T = panic "defaultDynFlags: No pgm_T",
664 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
665 pgm_windres = panic "defaultDynFlags: No pgm_windres",
666 -- end of initSysTools values
668 depMakefile = "Makefile",
669 depIncludePkgDeps = False,
672 -- end of ghc -M values
673 filesToClean = panic "defaultDynFlags: No filesToClean",
674 dirsToClean = panic "defaultDynFlags: No dirsToClean",
675 haddockOptions = Nothing,
677 Opt_AutoLinkPackages,
678 Opt_ReadUserPackageConf,
680 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
681 -- behaviour the default, to see if anyone notices
685 Opt_MonomorphismRestriction,
693 Opt_PrintBindContents
695 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
696 -- The default -O0 options
699 log_action = \severity srcSpan style msg ->
701 SevInfo -> printErrs (msg style)
702 SevFatal -> printErrs (msg style)
705 printErrs ((mkLocMessage srcSpan msg) style)
706 -- careful (#2302): printErrs prints in UTF-8, whereas
707 -- converting to string first and using hPutStr would
708 -- just emit the low 8 bits of each unicode char.
715 0 | print errors & warnings only
716 1 | minimal verbosity: print "compiling M ... done." for each module.
717 2 | equivalent to -dshow-passes
718 3 | equivalent to existing "ghc -v"
719 4 | "ghc -v -ddump-most"
720 5 | "ghc -v -ddump-all"
723 -- | Test whether a 'DynFlag' is set
724 dopt :: DynFlag -> DynFlags -> Bool
725 dopt f dflags = f `elem` (flags dflags)
728 dopt_set :: DynFlags -> DynFlag -> DynFlags
729 dopt_set dfs f = dfs{ flags = f : flags dfs }
731 -- | Unset a 'DynFlag'
732 dopt_unset :: DynFlags -> DynFlag -> DynFlags
733 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
735 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
736 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
737 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
738 -> [a] -- ^ Correctly ordered extracted options
739 getOpts dflags opts = reverse (opts dflags)
740 -- We add to the options from the front, so we need to reverse the list
742 -- | Gets the verbosity flag for the current verbosity level. This is fed to
743 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
744 getVerbFlag :: DynFlags -> String
746 | verbosity dflags >= 3 = "-v"
749 setObjectDir, setHiDir, setStubDir, setOutputDir,
750 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
751 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
752 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
753 addCmdlineFramework, addHaddockOpts
754 :: String -> DynFlags -> DynFlags
755 setOutputFile, setOutputHi, setDumpPrefixForce
756 :: Maybe String -> DynFlags -> DynFlags
758 setObjectDir f d = d{ objectDir = Just f}
759 setHiDir f d = d{ hiDir = Just f}
760 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
761 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
762 -- \#included from the .hc file when compiling with -fvia-C.
763 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
765 setObjectSuf f d = d{ objectSuf = f}
766 setHiSuf f d = d{ hiSuf = f}
767 setHcSuf f d = d{ hcSuf = f}
769 setOutputFile f d = d{ outputFile = f}
770 setOutputHi f d = d{ outputHi = f}
772 parseDynLibLoaderMode f d =
774 ("deploy", "") -> d{ dynLibLoader = Deployable }
775 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
776 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
777 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
778 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
779 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
781 setDumpPrefixForce f d = d { dumpPrefixForce = f}
783 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
784 -- Config.hs should really use Option.
785 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
787 setPgmL f d = d{ pgm_L = f}
788 setPgmF f d = d{ pgm_F = f}
789 setPgmc f d = d{ pgm_c = (f,[])}
790 setPgmm f d = d{ pgm_m = (f,[])}
791 setPgms f d = d{ pgm_s = (f,[])}
792 setPgma f d = d{ pgm_a = (f,[])}
793 setPgml f d = d{ pgm_l = (f,[])}
794 setPgmdll f d = d{ pgm_dll = (f,[])}
795 setPgmwindres f d = d{ pgm_windres = f}
797 addOptL f d = d{ opt_L = f : opt_L d}
798 addOptP f d = d{ opt_P = f : opt_P d}
799 addOptF f d = d{ opt_F = f : opt_F d}
800 addOptc f d = d{ opt_c = f : opt_c d}
801 addOptm f d = d{ opt_m = f : opt_m d}
802 addOpta f d = d{ opt_a = f : opt_a d}
803 addOptl f d = d{ opt_l = f : opt_l d}
804 addOptwindres f d = d{ opt_windres = f : opt_windres d}
806 setDepMakefile :: FilePath -> DynFlags -> DynFlags
807 setDepMakefile f d = d { depMakefile = deOptDep f }
809 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
810 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
812 addDepExcludeMod :: String -> DynFlags -> DynFlags
814 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
816 addDepSuffix :: FilePath -> DynFlags -> DynFlags
817 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
820 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
821 -- we need to strip the "-optdep" off of the arg
822 deOptDep :: String -> String
823 deOptDep x = case maybePrefixMatch "-optdep" x of
827 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
829 addHaddockOpts f d = d{ haddockOptions = Just f}
831 -- -----------------------------------------------------------------------------
832 -- Command-line options
834 -- | When invoking external tools as part of the compilation pipeline, we
835 -- pass these a sequence of options on the command-line. Rather than
836 -- just using a list of Strings, we use a type that allows us to distinguish
837 -- between filepaths and 'other stuff'. The reason for this is that
838 -- this type gives us a handle on transforming filenames, and filenames only,
839 -- to whatever format they're expected to be on a particular platform.
841 = FileOption -- an entry that _contains_ filename(s) / filepaths.
842 String -- a non-filepath prefix that shouldn't be
843 -- transformed (e.g., "/out=")
844 String -- the filepath/filename portion
847 -----------------------------------------------------------------------------
848 -- Setting the optimisation level
850 updOptLevel :: Int -> DynFlags -> DynFlags
851 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
853 = dfs2{ optLevel = final_n }
855 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
856 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
857 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
859 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
860 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
862 optLevelFlags :: [([Int], DynFlag)]
864 = [ ([0], Opt_IgnoreInterfacePragmas)
865 , ([0], Opt_OmitInterfacePragmas)
867 , ([1,2], Opt_IgnoreAsserts)
868 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
870 , ([1,2], Opt_DoEtaReduction)
871 , ([1,2], Opt_CaseMerge)
872 , ([1,2], Opt_Strictness)
874 , ([1,2], Opt_FullLaziness)
876 , ([2], Opt_LiberateCase)
877 , ([2], Opt_SpecConstr)
879 -- , ([2], Opt_StaticArgumentTransformation)
880 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
881 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
882 -- several improvements to the heuristics, and I'm concerned that without
883 -- those changes SAT will interfere with some attempts to write "high
884 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
885 -- this year. In particular, the version in HEAD lacks the tail call
886 -- criterion, so many things that look like reasonable loops will be
887 -- turned into functions with extra (unneccesary) thunk creation.
889 , ([0,1,2], Opt_DoLambdaEtaExpansion)
890 -- This one is important for a tiresome reason:
891 -- we want to make sure that the bindings for data
892 -- constructors are eta-expanded. This is probably
893 -- a good thing anyway, but it seems fragile.
896 -- -----------------------------------------------------------------------------
897 -- Standard sets of warning options
899 standardWarnings :: [DynFlag]
901 = [ Opt_WarnWarningsDeprecations,
902 Opt_WarnDeprecatedFlags,
903 Opt_WarnUnrecognisedPragmas,
904 Opt_WarnOverlappingPatterns,
905 Opt_WarnMissingFields,
906 Opt_WarnMissingMethods,
907 Opt_WarnDuplicateExports,
908 Opt_WarnDodgyForeignImports
911 minusWOpts :: [DynFlag]
913 = standardWarnings ++
914 [ Opt_WarnUnusedBinds,
915 Opt_WarnUnusedMatches,
916 Opt_WarnUnusedImports,
917 Opt_WarnIncompletePatterns,
921 minusWallOpts :: [DynFlag]
924 [ Opt_WarnTypeDefaults,
925 Opt_WarnNameShadowing,
931 -- minuswRemovesOpts should be every warning option
932 minuswRemovesOpts :: [DynFlag]
935 [Opt_WarnImplicitPrelude,
936 Opt_WarnIncompletePatternsRecUpd,
937 Opt_WarnSimplePatterns,
938 Opt_WarnMonomorphism,
939 Opt_WarnUnrecognisedPragmas,
943 -- -----------------------------------------------------------------------------
944 -- CoreToDo: abstraction of core-to-core passes to run.
946 data CoreToDo -- These are diff core-to-core passes,
947 -- which may be invoked in any order,
948 -- as many times as you like.
950 = CoreDoSimplify -- The core-to-core simplifier.
953 -- Each run of the simplifier can take a different
954 -- set of simplifier-specific flags.
956 | CoreDoFloatOutwards FloatOutSwitches
961 | CoreDoWorkerWrapper
964 | CoreDoOldStrictness
967 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
968 -- matching this string
969 | CoreDoVectorisation PackageId
970 | CoreDoNothing -- Useful when building up
971 | CoreDoPasses [CoreToDo] -- lists of these things
974 data SimplifierMode -- See comments in SimplMonad
976 | SimplPhase Int [String]
978 instance Outputable SimplifierMode where
979 ppr SimplGently = ptext (sLit "gentle")
980 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
983 data SimplifierSwitch
984 = MaxSimplifierIterations Int
988 data FloatOutSwitches = FloatOutSwitches {
989 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
990 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
991 -- even if they do not escape a lambda
994 instance Outputable FloatOutSwitches where
995 ppr = pprFloatOutSwitches
997 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
998 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
999 <+> pp_not (floatOutConstants sw) <+> text "constants"
1002 pp_not False = text "not"
1004 -- | Switches that specify the minimum amount of floating out
1005 -- gentleFloatOutSwitches :: FloatOutSwitches
1006 -- gentleFloatOutSwitches = FloatOutSwitches False False
1008 -- | Switches that do not specify floating out of lambdas, just of constants
1009 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1010 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1013 -- The core-to-core pass ordering is derived from the DynFlags:
1014 runWhen :: Bool -> CoreToDo -> CoreToDo
1015 runWhen True do_this = do_this
1016 runWhen False _ = CoreDoNothing
1018 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1019 runMaybe (Just x) f = f x
1020 runMaybe Nothing _ = CoreDoNothing
1022 getCoreToDo :: DynFlags -> [CoreToDo]
1024 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1025 | otherwise = core_todo
1027 opt_level = optLevel dflags
1028 phases = simplPhases dflags
1029 max_iter = maxSimplIterations dflags
1030 strictness = dopt Opt_Strictness dflags
1031 full_laziness = dopt Opt_FullLaziness dflags
1032 cse = dopt Opt_CSE dflags
1033 spec_constr = dopt Opt_SpecConstr dflags
1034 liberate_case = dopt Opt_LiberateCase dflags
1035 rule_check = ruleCheck dflags
1036 static_args = dopt Opt_StaticArgumentTransformation dflags
1038 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1040 simpl_phase phase names iter
1042 [ CoreDoSimplify (SimplPhase phase names) [
1043 MaxSimplifierIterations iter
1045 maybe_rule_check phase
1049 = runWhen (dopt Opt_Vectorise dflags)
1050 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1053 -- By default, we have 2 phases before phase 0.
1055 -- Want to run with inline phase 2 after the specialiser to give
1056 -- maximum chance for fusion to work before we inline build/augment
1057 -- in phase 1. This made a difference in 'ansi' where an
1058 -- overloaded function wasn't inlined till too late.
1060 -- Need phase 1 so that build/augment get
1061 -- inlined. I found that spectral/hartel/genfft lost some useful
1062 -- strictness in the function sumcode' if augment is not inlined
1063 -- before strictness analysis runs
1064 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1065 | phase <- [phases, phases-1 .. 1] ]
1068 -- initial simplify: mk specialiser happy: minimum effort please
1069 simpl_gently = CoreDoSimplify SimplGently [
1070 -- Simplify "gently"
1071 -- Don't inline anything till full laziness has bitten
1072 -- In particular, inlining wrappers inhibits floating
1073 -- e.g. ...(case f x of ...)...
1074 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1075 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1076 -- and now the redex (f x) isn't floatable any more
1077 -- Similarly, don't apply any rules until after full
1078 -- laziness. Notably, list fusion can prevent floating.
1080 NoCaseOfCase, -- Don't do case-of-case transformations.
1081 -- This makes full laziness work better
1082 MaxSimplifierIterations max_iter
1086 if opt_level == 0 then
1088 simpl_phase 0 ["final"] max_iter]
1089 else {- opt_level >= 1 -} [
1091 -- We want to do the static argument transform before full laziness as it
1092 -- may expose extra opportunities to float things outwards. However, to fix
1093 -- up the output of the transformation we need at do at least one simplify
1094 -- after this before anything else
1095 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1097 -- We run vectorisation here for now, but we might also try to run
1101 -- initial simplify: mk specialiser happy: minimum effort please
1104 -- Specialisation is best done before full laziness
1105 -- so that overloaded functions have all their dictionary lambdas manifest
1108 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1109 -- Was: gentleFloatOutSwitches
1110 -- I have no idea why, but not floating constants to top level is
1111 -- very bad in some cases.
1112 -- Notably: p_ident in spectral/rewrite
1113 -- Changing from "gentle" to "constantsOnly" improved
1114 -- rewrite's allocation by 19%, and made 0.0% difference
1115 -- to any other nofib benchmark
1121 -- Phase 0: allow all Ids to be inlined now
1122 -- This gets foldr inlined before strictness analysis
1124 -- At least 3 iterations because otherwise we land up with
1125 -- huge dead expressions because of an infelicity in the
1127 -- let k = BIG in foldr k z xs
1128 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1129 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1131 simpl_phase 0 ["main"] (max max_iter 3),
1134 #ifdef OLD_STRICTNESS
1135 CoreDoOldStrictness,
1137 runWhen strictness (CoreDoPasses [
1139 CoreDoWorkerWrapper,
1141 simpl_phase 0 ["post-worker-wrapper"] max_iter
1144 runWhen full_laziness
1145 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1146 -- nofib/spectral/hartel/wang doubles in speed if you
1147 -- do full laziness late in the day. It only happens
1148 -- after fusion and other stuff, so the early pass doesn't
1149 -- catch it. For the record, the redex is
1150 -- f_el22 (f_el21 r_midblock)
1153 runWhen cse CoreCSE,
1154 -- We want CSE to follow the final full-laziness pass, because it may
1155 -- succeed in commoning up things floated out by full laziness.
1156 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1162 -- Case-liberation for -O2. This should be after
1163 -- strictness analysis and the simplification which follows it.
1164 runWhen liberate_case (CoreDoPasses [
1166 simpl_phase 0 ["post-liberate-case"] max_iter
1167 ]), -- Run the simplifier after LiberateCase to vastly
1168 -- reduce the possiblility of shadowing
1169 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1171 runWhen spec_constr CoreDoSpecConstr,
1175 -- Final clean-up simplification:
1176 simpl_phase 0 ["final"] max_iter
1179 -- -----------------------------------------------------------------------------
1180 -- StgToDo: abstraction of stg-to-stg passes to run.
1183 = StgDoMassageForProfiling -- should be (next to) last
1184 -- There's also setStgVarInfo, but its absolute "lastness"
1185 -- is so critical that it is hardwired in (no flag).
1188 getStgToDo :: DynFlags -> [StgToDo]
1190 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1193 stg_stats = dopt Opt_StgStats dflags
1195 todo1 = if stg_stats then [D_stg_stats] else []
1197 todo2 | WayProf `elem` wayNames dflags
1198 = StgDoMassageForProfiling : todo1
1202 -- -----------------------------------------------------------------------------
1205 allFlags :: [String]
1206 allFlags = map ('-':) $
1207 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1208 map ("fno-"++) flags ++
1209 map ("f"++) flags ++
1210 map ("X"++) supportedLanguages ++
1211 map ("XNo"++) supportedLanguages
1212 where ok (PrefixPred _ _) = False
1214 flags = [ name | (name, _, _) <- fFlags ]
1216 dynamic_flags :: [Flag DynP]
1218 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1219 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1220 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1221 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1222 , Flag "v" (OptIntSuffix setVerbosity) Supported
1224 ------- Specific phases --------------------------------------------
1225 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1226 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1227 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1228 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1229 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1230 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1231 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1232 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1233 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1234 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1236 , Flag "optL" (HasArg (upd . addOptL)) Supported
1237 , Flag "optP" (HasArg (upd . addOptP)) Supported
1238 , Flag "optF" (HasArg (upd . addOptF)) Supported
1239 , Flag "optc" (HasArg (upd . addOptc)) Supported
1240 , Flag "optm" (HasArg (upd . addOptm)) Supported
1241 , Flag "opta" (HasArg (upd . addOpta)) Supported
1242 , Flag "optl" (HasArg (upd . addOptl)) Supported
1243 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1246 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1249 -------- ghc -M -----------------------------------------------------
1250 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1251 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1252 (Deprecated "Use -dep-suffix instead")
1253 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1254 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1255 (Deprecated "Use -dep-makefile instead")
1256 , Flag "optdep-w" (NoArg (return ()))
1257 (Deprecated "-optdep-w doesn't do anything")
1258 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1259 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1260 (Deprecated "Use -include-pkg-deps instead")
1261 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1262 (Deprecated "Use -include-pkg-deps instead")
1263 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1264 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1265 (Deprecated "Use -exclude-module instead")
1266 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1267 (Deprecated "Use -exclude-module instead")
1269 -------- Linking ----------------------------------------------------
1270 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1272 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1273 (Deprecated "Use -c instead")
1274 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1276 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1279 ------- Libraries ---------------------------------------------------
1280 , Flag "L" (Prefix addLibraryPath ) Supported
1281 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1283 ------- Frameworks --------------------------------------------------
1284 -- -framework-path should really be -F ...
1285 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1286 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1288 ------- Output Redirection ------------------------------------------
1289 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1290 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1291 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1292 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1293 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1294 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1295 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1296 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1297 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1298 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1299 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1302 ------- Keeping temporary files -------------------------------------
1303 -- These can be singular (think ghc -c) or plural (think ghc --make)
1304 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1305 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1306 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1307 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1308 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1309 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1310 -- This only makes sense as plural
1311 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1313 ------- Miscellaneous ----------------------------------------------
1314 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1315 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1316 , Flag "main-is" (SepArg setMainIs ) Supported
1317 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1318 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1319 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1321 ------- recompilation checker --------------------------------------
1322 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1323 (Deprecated "Use -fno-force-recomp instead")
1324 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1325 (Deprecated "Use -fforce-recomp instead")
1327 ------ HsCpp opts ---------------------------------------------------
1328 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1329 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1331 ------- Include/Import Paths ----------------------------------------
1332 , Flag "I" (Prefix addIncludePath) Supported
1333 , Flag "i" (OptPrefix addImportPath ) Supported
1335 ------ Debugging ----------------------------------------------------
1336 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1338 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1340 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1342 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1344 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1346 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1348 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1350 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1352 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1354 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1356 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1358 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1360 , Flag "ddump-asm-regalloc-stages"
1361 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1363 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1365 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1367 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1369 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1371 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1373 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1375 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1377 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1379 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1381 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1383 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1385 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1387 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1389 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1391 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1393 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1395 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1397 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1399 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1401 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1403 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1405 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1407 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1409 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1411 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1413 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1415 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1417 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1419 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1421 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1423 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1425 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1427 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1429 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1431 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1433 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1435 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1437 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1439 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1441 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1443 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1445 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1447 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1449 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1452 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1454 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1456 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1458 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1460 , Flag "dshow-passes"
1461 (NoArg (do forceRecompile
1462 setVerbosity (Just 2)))
1464 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1467 ------ Machine dependant (-m<blah>) stuff ---------------------------
1469 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1471 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1473 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1476 ------ Warning opts -------------------------------------------------
1477 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1479 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1481 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1483 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1485 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1486 (Deprecated "Use -w instead")
1487 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1490 ------ Optimisation flags ------------------------------------------
1491 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1492 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1493 (Deprecated "Use -O0 instead")
1494 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1495 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1497 -- If the number is missing, use 1
1499 , Flag "fsimplifier-phases"
1500 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1502 , Flag "fmax-simplifier-iterations"
1503 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1506 , Flag "fspec-constr-threshold"
1507 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1509 , Flag "fno-spec-constr-threshold"
1510 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1512 , Flag "fspec-constr-count"
1513 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1515 , Flag "fno-spec-constr-count"
1516 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1518 , Flag "fliberate-case-threshold"
1519 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1521 , Flag "fno-liberate-case-threshold"
1522 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1525 , Flag "frule-check"
1526 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1528 , Flag "fcontext-stack"
1529 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1532 ------ Profiling ----------------------------------------------------
1534 -- XXX Should the -f* flags be deprecated?
1535 -- They don't seem to be documented
1536 , Flag "fauto-sccs-on-all-toplevs"
1537 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1540 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1542 , Flag "no-auto-all"
1543 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1545 , Flag "fauto-sccs-on-exported-toplevs"
1546 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1549 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1552 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1554 , Flag "fauto-sccs-on-individual-cafs"
1555 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1558 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1561 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1564 ------ DPH flags ----------------------------------------------------
1567 (NoArg (setDPHBackend DPHSeq))
1570 (NoArg (setDPHBackend DPHPar))
1573 (NoArg (setDPHBackend DPHThis))
1576 ------ Compiler flags -----------------------------------------------
1578 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1579 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1580 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1582 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1583 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1584 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1586 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1588 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1591 ++ map (mkFlag True "f" setDynFlag ) fFlags
1592 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1593 ++ map (mkFlag True "X" setDynFlag ) xFlags
1594 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1596 package_flags :: [Flag DynP]
1598 ------- Packages ----------------------------------------------------
1599 Flag "package-conf" (HasArg extraPkgConf_) Supported
1600 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1602 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1603 , Flag "package" (HasArg exposePackage) Supported
1604 , Flag "hide-package" (HasArg hidePackage) Supported
1605 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1607 , Flag "ignore-package" (HasArg ignorePackage)
1609 , Flag "syslib" (HasArg exposePackage)
1610 (Deprecated "Use -package instead")
1613 mkFlag :: Bool -- ^ True <=> it should be turned on
1614 -> String -- ^ The flag prefix
1615 -> (DynFlag -> DynP ())
1616 -> (String, DynFlag, Bool -> Deprecated)
1618 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1619 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1621 deprecatedForLanguage :: String -> Bool -> Deprecated
1622 deprecatedForLanguage lang turn_on
1623 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1625 flag | turn_on = lang
1626 | otherwise = "No"++lang
1628 useInstead :: String -> Bool -> Deprecated
1629 useInstead flag turn_on
1630 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1632 no = if turn_on then "" else "no-"
1634 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1635 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1637 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1638 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1639 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1640 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1641 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1642 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1643 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1644 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1645 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1646 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1647 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1648 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1649 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1650 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1651 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1652 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1653 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1654 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1655 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1656 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1657 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1658 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1659 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1660 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1661 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1662 ( "strictness", Opt_Strictness, const Supported ),
1663 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1664 ( "full-laziness", Opt_FullLaziness, const Supported ),
1665 ( "liberate-case", Opt_LiberateCase, const Supported ),
1666 ( "spec-constr", Opt_SpecConstr, const Supported ),
1667 ( "cse", Opt_CSE, const Supported ),
1668 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1669 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1670 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1671 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1672 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1673 ( "case-merge", Opt_CaseMerge, const Supported ),
1674 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1675 ( "method-sharing", Opt_MethodSharing, const Supported ),
1676 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1677 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1678 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1679 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1680 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1681 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1682 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1683 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1684 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1685 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1686 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1687 ( "break-on-error", Opt_BreakOnError, const Supported ),
1688 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1689 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1690 ( "run-cps", Opt_RunCPS, const Supported ),
1691 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1692 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1693 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1694 ( "vectorise", Opt_Vectorise, const Supported ),
1695 ( "regs-graph", Opt_RegsGraph, const Supported ),
1696 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1697 ( "th", Opt_TemplateHaskell,
1698 deprecatedForLanguage "TemplateHaskell" ),
1699 ( "fi", Opt_ForeignFunctionInterface,
1700 deprecatedForLanguage "ForeignFunctionInterface" ),
1701 ( "ffi", Opt_ForeignFunctionInterface,
1702 deprecatedForLanguage "ForeignFunctionInterface" ),
1703 ( "arrows", Opt_Arrows,
1704 deprecatedForLanguage "Arrows" ),
1705 ( "generics", Opt_Generics,
1706 deprecatedForLanguage "Generics" ),
1707 ( "implicit-prelude", Opt_ImplicitPrelude,
1708 deprecatedForLanguage "ImplicitPrelude" ),
1709 ( "bang-patterns", Opt_BangPatterns,
1710 deprecatedForLanguage "BangPatterns" ),
1711 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1712 deprecatedForLanguage "MonomorphismRestriction" ),
1713 ( "mono-pat-binds", Opt_MonoPatBinds,
1714 deprecatedForLanguage "MonoPatBinds" ),
1715 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1716 deprecatedForLanguage "ExtendedDefaultRules" ),
1717 ( "implicit-params", Opt_ImplicitParams,
1718 deprecatedForLanguage "ImplicitParams" ),
1719 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1720 deprecatedForLanguage "ScopedTypeVariables" ),
1722 deprecatedForLanguage "PArr" ),
1723 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1724 deprecatedForLanguage "OverlappingInstances" ),
1725 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1726 deprecatedForLanguage "UndecidableInstances" ),
1727 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1728 deprecatedForLanguage "IncoherentInstances" ),
1729 ( "gen-manifest", Opt_GenManifest, const Supported ),
1730 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1731 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1734 supportedLanguages :: [String]
1735 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1737 -- This may contain duplicates
1738 languageOptions :: [DynFlag]
1739 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1741 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1742 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1744 ( "CPP", Opt_Cpp, const Supported ),
1745 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1746 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1747 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1748 ( "MagicHash", Opt_MagicHash, const Supported ),
1749 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1750 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1751 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1752 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1753 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1754 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1755 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1756 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1757 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1758 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1759 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1760 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1761 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1762 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1763 ( "Arrows", Opt_Arrows, const Supported ),
1764 ( "PArr", Opt_PArr, const Supported ),
1765 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1766 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1767 ( "Generics", Opt_Generics, const Supported ),
1769 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1770 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1771 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1772 ( "RecordPuns", Opt_RecordPuns,
1773 deprecatedForLanguage "NamedFieldPuns" ),
1774 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1775 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1776 ( "GADTs", Opt_GADTs, const Supported ),
1777 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1778 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1779 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1781 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1782 -- On by default (which is not strictly H98):
1783 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1784 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1785 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1786 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1787 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1789 ( "PatternSignatures", Opt_ScopedTypeVariables,
1790 deprecatedForLanguage "ScopedTypeVariables" ),
1792 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1793 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1794 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1795 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1796 ( "DeriveTraversable", Opt_DeriveTraversable, const Supported ),
1797 ( "DeriveFoldable", Opt_DeriveFoldable, const Supported ),
1798 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1799 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1800 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1801 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1802 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1803 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1804 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1805 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1806 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1807 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1808 ( "PackageImports", Opt_PackageImports, const Supported ),
1809 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1812 impliedFlags :: [(DynFlag, DynFlag)]
1814 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1815 -- be completely rigid for GADTs
1817 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1818 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1819 -- all over the place
1821 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1822 -- Note [Scoped tyvars] in TcBinds
1823 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1826 glasgowExtsFlags :: [DynFlag]
1827 glasgowExtsFlags = [
1828 Opt_PrintExplicitForalls
1829 , Opt_ForeignFunctionInterface
1830 , Opt_UnliftedFFITypes
1832 , Opt_ImplicitParams
1833 , Opt_ScopedTypeVariables
1835 , Opt_TypeSynonymInstances
1836 , Opt_StandaloneDeriving
1837 , Opt_DeriveDataTypeable
1839 , Opt_DeriveFoldable
1840 , Opt_DeriveTraversable
1841 , Opt_FlexibleContexts
1842 , Opt_FlexibleInstances
1843 , Opt_ConstrainedClassMethods
1844 , Opt_MultiParamTypeClasses
1845 , Opt_FunctionalDependencies
1847 , Opt_PolymorphicComponents
1848 , Opt_ExistentialQuantification
1850 , Opt_PostfixOperators
1852 , Opt_LiberalTypeSynonyms
1856 , Opt_ParallelListComp
1857 , Opt_EmptyDataDecls
1858 , Opt_KindSignatures
1859 , Opt_GeneralizedNewtypeDeriving
1860 , Opt_TypeFamilies ]
1862 -- -----------------------------------------------------------------------------
1863 -- Parsing the dynamic flags.
1865 -- | Parse dynamic flags from a list of command line arguments. Returns the
1866 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1867 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1868 -- flags or missing arguments).
1869 parseDynamicFlags :: Monad m =>
1870 DynFlags -> [Located String]
1871 -> m (DynFlags, [Located String], [Located String])
1872 -- ^ Updated 'DynFlags', left-over arguments, and
1873 -- list of warnings.
1874 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1876 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1877 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1878 parseDynamicNoPackageFlags :: Monad m =>
1879 DynFlags -> [Located String]
1880 -> m (DynFlags, [Located String], [Located String])
1881 -- ^ Updated 'DynFlags', left-over arguments, and
1882 -- list of warnings.
1883 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1885 parseDynamicFlags_ :: Monad m =>
1886 DynFlags -> [Located String] -> Bool
1887 -> m (DynFlags, [Located String], [Located String])
1888 parseDynamicFlags_ dflags args pkg_flags = do
1889 -- XXX Legacy support code
1890 -- We used to accept things like
1891 -- optdep-f -optdepdepend
1892 -- optdep-f -optdep depend
1893 -- optdep -f -optdepdepend
1894 -- optdep -f -optdep depend
1895 -- but the spaces trip up proper argument handling. So get rid of them.
1896 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1897 f (x : xs) = x : f xs
1901 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1902 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1903 | otherwise = dynamic_flags
1905 let ((leftover, errs, warns), dflags')
1906 = runCmdLine (processArgs flag_spec args') dflags
1907 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1908 return (dflags', leftover, warns)
1910 type DynP = CmdLineP DynFlags
1912 upd :: (DynFlags -> DynFlags) -> DynP ()
1914 dfs <- getCmdLineState
1915 putCmdLineState $! (f dfs)
1917 --------------------------
1918 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1919 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1920 ; mapM_ setDynFlag deps }
1922 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1923 -- When you set f, set the ones it implies
1924 -- NB: use setDynFlag recursively, in case the implied flags
1925 -- implies further flags
1926 -- When you un-set f, however, we don't un-set the things it implies
1927 -- (except for -fno-glasgow-exts, which is treated specially)
1929 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1931 --------------------------
1932 setDumpFlag :: DynFlag -> OptKind DynP
1933 setDumpFlag dump_flag
1934 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1936 -- Certain dumpy-things are really interested in what's going
1937 -- on during recompilation checking, so in those cases we
1938 -- don't want to turn it off.
1939 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1940 Opt_D_dump_hi_diffs]
1942 forceRecompile :: DynP ()
1943 -- Whenver we -ddump, force recompilation (by switching off the
1944 -- recompilation checker), else you don't see the dump! However,
1945 -- don't switch it off in --make mode, else *everything* gets
1946 -- recompiled which probably isn't what you want
1947 forceRecompile = do { dfs <- getCmdLineState
1948 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1950 force_recomp dfs = isOneShot (ghcMode dfs)
1952 setVerboseCore2Core :: DynP ()
1953 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1955 upd (\s -> s { shouldDumpSimplPhase = const True })
1957 setDumpSimplPhases :: String -> DynP ()
1958 setDumpSimplPhases s = do forceRecompile
1959 upd (\s -> s { shouldDumpSimplPhase = spec })
1961 spec :: SimplifierMode -> Bool
1963 . map (join (&&) . map match . split ':')
1969 join :: (Bool -> Bool -> Bool)
1970 -> [SimplifierMode -> Bool]
1971 -> SimplifierMode -> Bool
1972 join _ [] = const True
1973 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1975 match :: String -> SimplifierMode -> Bool
1976 match "" = const True
1977 match s = case reads s of
1978 [(n,"")] -> phase_num n
1981 phase_num :: Int -> SimplifierMode -> Bool
1982 phase_num n (SimplPhase k _) = n == k
1983 phase_num _ _ = False
1985 phase_name :: String -> SimplifierMode -> Bool
1986 phase_name s SimplGently = s == "gentle"
1987 phase_name s (SimplPhase _ ss) = s `elem` ss
1989 setVerbosity :: Maybe Int -> DynP ()
1990 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1992 addCmdlineHCInclude :: String -> DynP ()
1993 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1995 extraPkgConf_ :: FilePath -> DynP ()
1996 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1998 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
2000 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
2002 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
2004 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2006 setPackageName :: String -> DynFlags -> DynFlags
2008 | Nothing <- unpackPackageId pid
2009 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2011 = \s -> s{ thisPackage = pid }
2013 pid = stringToPackageId p
2015 -- If we're linking a binary, then only targets that produce object
2016 -- code are allowed (requests for other target types are ignored).
2017 setTarget :: HscTarget -> DynP ()
2018 setTarget l = upd set
2021 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2024 -- Changes the target only if we're compiling object code. This is
2025 -- used by -fasm and -fvia-C, which switch from one to the other, but
2026 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2027 -- can be safely used in an OPTIONS_GHC pragma.
2028 setObjTarget :: HscTarget -> DynP ()
2029 setObjTarget l = upd set
2032 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2035 setOptLevel :: Int -> DynFlags -> DynFlags
2036 setOptLevel n dflags
2037 | hscTarget dflags == HscInterpreted && n > 0
2039 -- not in IO any more, oh well:
2040 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2042 = updOptLevel n dflags
2045 -- -Odph is equivalent to
2047 -- -O2 optimise as much as possible
2048 -- -fno-method-sharing sharing specialisation defeats fusion
2050 -- -fdicts-cheap always inline dictionaries
2051 -- -fmax-simplifier-iterations20 this is necessary sometimes
2052 -- -fsimplifier-phases=3 we use an additional simplifier phase
2054 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2055 -- -fno-spec-constr-count SpecConstr as much as possible
2056 -- -finline-enough-args hack to prevent excessive inlining
2058 setDPHOpt :: DynFlags -> DynFlags
2059 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2061 , specConstrThreshold = Nothing
2062 , specConstrCount = Nothing
2064 `dopt_set` Opt_DictsCheap
2065 `dopt_unset` Opt_MethodSharing
2066 `dopt_set` Opt_InlineIfEnoughArgs
2068 data DPHBackend = DPHPar
2071 deriving(Eq, Ord, Enum, Show)
2073 setDPHBackend :: DPHBackend -> DynP ()
2074 setDPHBackend backend
2076 upd $ \dflags -> dflags { dphBackend = backend }
2077 mapM_ exposePackage (dph_packages backend)
2079 dph_packages DPHThis = []
2080 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2081 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2083 dphPackage :: DynFlags -> PackageId
2084 dphPackage dflags = case dphBackend dflags of
2085 DPHPar -> dphParPackageId
2086 DPHSeq -> dphSeqPackageId
2087 DPHThis -> thisPackage dflags
2089 setMainIs :: String -> DynP ()
2091 | not (null main_fn) && isLower (head main_fn)
2092 -- The arg looked like "Foo.Bar.baz"
2093 = upd $ \d -> d{ mainFunIs = Just main_fn,
2094 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2096 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2097 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2099 | otherwise -- The arg looked like "baz"
2100 = upd $ \d -> d{ mainFunIs = Just arg }
2102 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2104 -----------------------------------------------------------------------------
2105 -- Paths & Libraries
2107 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2109 -- -i on its own deletes the import paths
2110 addImportPath "" = upd (\s -> s{importPaths = []})
2111 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2115 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2118 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2120 addFrameworkPath p =
2121 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2123 #ifndef mingw32_TARGET_OS
2124 split_marker :: Char
2125 split_marker = ':' -- not configurable (ToDo)
2128 splitPathList :: String -> [String]
2129 splitPathList s = filter notNull (splitUp s)
2130 -- empty paths are ignored: there might be a trailing
2131 -- ':' in the initial list, for example. Empty paths can
2132 -- cause confusion when they are translated into -I options
2133 -- for passing to gcc.
2135 #ifndef mingw32_TARGET_OS
2136 splitUp xs = split split_marker xs
2138 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2140 -- That is, if "foo:bar:baz" is used, this interpreted as
2141 -- consisting of three entries, 'foo', 'bar', 'baz'.
2142 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2143 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2145 -- Notice that no attempt is made to fully replace the 'standard'
2146 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2147 -- that this will cause too much breakage for users & ':' will
2148 -- work fine even with DOS paths, if you're not insisting on being silly.
2151 splitUp (x:':':div:xs) | div `elem` dir_markers
2152 = ((x:':':div:p): splitUp rs)
2154 (p,rs) = findNextPath xs
2155 -- we used to check for existence of the path here, but that
2156 -- required the IO monad to be threaded through the command-line
2157 -- parser which is quite inconvenient. The
2158 splitUp xs = cons p (splitUp rs)
2160 (p,rs) = findNextPath xs
2165 -- will be called either when we've consumed nought or the
2166 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2167 -- finding the next split marker.
2169 case break (`elem` split_markers) xs of
2170 (p, _:ds) -> (p, ds)
2173 split_markers :: [Char]
2174 split_markers = [':', ';']
2176 dir_markers :: [Char]
2177 dir_markers = ['/', '\\']
2180 -- -----------------------------------------------------------------------------
2181 -- tmpDir, where we store temporary files.
2183 setTmpDir :: FilePath -> DynFlags -> DynFlags
2184 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2185 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2186 -- seem necessary now --SDM 7/2/2008
2188 -----------------------------------------------------------------------------
2191 setOptHpcDir :: String -> DynP ()
2192 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2194 -----------------------------------------------------------------------------
2195 -- Via-C compilation stuff
2197 -- There are some options that we need to pass to gcc when compiling
2198 -- Haskell code via C, but are only supported by recent versions of
2199 -- gcc. The configure script decides which of these options we need,
2200 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2201 -- read before each via-C compilation. The advantage of having these
2202 -- in a separate file is that the file can be created at install-time
2203 -- depending on the available gcc version, and even re-generated later
2204 -- if gcc is upgraded.
2206 -- The options below are not dependent on the version of gcc, only the
2209 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2210 [String]) -- for registerised HC compilations
2211 machdepCCOpts _dflags
2212 #if alpha_TARGET_ARCH
2214 #ifdef HAVE_THREADED_RTS_SUPPORT
2218 -- For now, to suppress the gcc warning "call-clobbered
2219 -- register used for global register variable", we simply
2220 -- disable all warnings altogether using the -w flag. Oh well.
2222 #elif hppa_TARGET_ARCH
2223 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2224 -- (very nice, but too bad the HP /usr/include files don't agree.)
2225 = ( ["-D_HPUX_SOURCE"], [] )
2227 #elif m68k_TARGET_ARCH
2228 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2229 -- popping of args to routines to be explicit; if we let things
2230 -- be deferred 'til after an STGJUMP, imminent death is certain!
2232 -- -fomit-frame-pointer : *don't*
2233 -- It's better to have a6 completely tied up being a frame pointer
2234 -- rather than let GCC pick random things to do with it.
2235 -- (If we want to steal a6, then we would try to do things
2236 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2237 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2239 #elif i386_TARGET_ARCH
2240 -- -fno-defer-pop : basically the same game as for m68k
2242 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2243 -- the fp (%ebp) for our register maps.
2244 = let n_regs = stolen_x86_regs _dflags
2247 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2250 "-fomit-frame-pointer",
2251 -- we want -fno-builtin, because when gcc inlines
2252 -- built-in functions like memcpy() it tends to
2253 -- run out of registers, requiring -monly-n-regs
2255 "-DSTOLEN_X86_REGS="++show n_regs ]
2258 #elif ia64_TARGET_ARCH
2259 = ( [], ["-fomit-frame-pointer", "-G0"] )
2261 #elif x86_64_TARGET_ARCH
2263 #if darwin_TARGET_OS
2268 ["-fomit-frame-pointer",
2269 "-fno-asynchronous-unwind-tables",
2270 -- the unwind tables are unnecessary for HC code,
2271 -- and get in the way of -split-objs. Another option
2272 -- would be to throw them away in the mangler, but this
2275 -- calling builtins like strlen() using the FFI can
2276 -- cause gcc to run out of regs, so use the external
2280 #elif sparc_TARGET_ARCH
2282 -- For now, to suppress the gcc warning "call-clobbered
2283 -- register used for global register variable", we simply
2284 -- disable all warnings altogether using the -w flag. Oh well.
2286 #elif powerpc_apple_darwin_TARGET
2288 -- Disable Apple's precompiling preprocessor. It's a great thing
2289 -- for "normal" programs, but it doesn't support register variable
2291 = ( [], ["-no-cpp-precomp"] )
2296 picCCOpts :: DynFlags -> [String]
2298 #if darwin_TARGET_OS
2299 -- Apple prefers to do things the other way round.
2300 -- PIC is on by default.
2301 -- -mdynamic-no-pic:
2302 -- Turn off PIC code generation.
2304 -- Don't generate "common" symbols - these are unwanted
2305 -- in dynamic libraries.
2308 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2310 = ["-mdynamic-no-pic"]
2311 #elif mingw32_TARGET_OS
2312 -- no -fPIC for Windows
2314 = ["-U __PIC__","-D__PIC__"]
2318 | opt_PIC || not opt_Static
2319 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2324 -- -----------------------------------------------------------------------------
2328 can_split = cSplitObjs == "YES"
2330 -- -----------------------------------------------------------------------------
2333 compilerInfo :: [(String, String)]
2334 compilerInfo = [("Project name", cProjectName),
2335 ("Project version", cProjectVersion),
2336 ("Booter version", cBooterVersion),
2338 ("Interface file version", cHscIfaceFileVersion),
2339 ("Have interpreter", cGhcWithInterpreter),
2340 ("Object splitting", cSplitObjs),
2341 ("Have native code generator", cGhcWithNativeCodeGen),
2342 ("Support SMP", cGhcWithSMP),
2343 ("Unregisterised", cGhcUnregisterised),
2344 ("Tables next to code", cGhcEnableTablesNextToCode),
2345 ("Win32 DLLs", cEnableWin32DLLs),
2346 ("RTS ways", cGhcRTSWays),
2347 ("Leading underscore", cLeadingUnderscore),
2348 ("Debug on", show debugIsOn)