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]
40 -- ** Parsing DynFlags
42 parseDynamicNoPackageFlags,
45 supportedLanguages, languageOptions,
47 -- ** DynFlag C compiler options
48 machdepCCOpts, picCCOpts,
50 -- * Configuration of the core-to-core passes
57 -- * Configuration of the stg-to-stg passes
61 -- * Compiler configuration suitable for display to the user
65 #include "HsVersions.h"
67 #ifndef OMIT_NATIVE_CODEGEN
72 import PrelNames ( mAIN, main_RDR_Unqual )
73 import RdrName ( RdrName, mkRdrUnqual )
74 import OccName ( mkVarOccFS )
75 #ifdef i386_TARGET_ARCH
76 import StaticFlags ( opt_Static )
78 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
80 import {-# SOURCE #-} Packages (PackageState)
81 import DriverPhases ( Phase(..), phaseInputExt )
84 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
86 import UniqFM ( UniqFM )
88 import Maybes ( orElse )
93 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
96 import Control.Monad ( when )
99 import Data.List ( intersperse )
100 import System.FilePath
101 import System.IO ( stderr, hPutChar )
103 -- -----------------------------------------------------------------------------
106 -- | Enumerates the simple on-or-off dynamic flags
112 | Opt_D_dump_cmmz_pretty
116 | Opt_D_dump_asm_native
117 | Opt_D_dump_asm_liveness
118 | Opt_D_dump_asm_coalesce
119 | Opt_D_dump_asm_regalloc
120 | Opt_D_dump_asm_regalloc_stages
121 | Opt_D_dump_asm_conflicts
122 | Opt_D_dump_asm_stats
128 | Opt_D_dump_inlinings
129 | Opt_D_dump_rule_firings
130 | Opt_D_dump_occur_anal
134 | Opt_D_dump_simpl_iterations
135 | Opt_D_dump_simpl_phases
144 | Opt_D_dump_worker_wrapper
145 | Opt_D_dump_rn_trace
146 | Opt_D_dump_rn_stats
148 | Opt_D_dump_simpl_stats
149 | Opt_D_dump_tc_trace
150 | Opt_D_dump_if_trace
157 | Opt_D_verbose_core2core
158 | Opt_D_verbose_stg2stg
160 | Opt_D_dump_hi_diffs
161 | Opt_D_dump_minimal_imports
162 | Opt_D_dump_mod_cycles
163 | Opt_D_dump_view_pattern_commoning
164 | Opt_D_faststring_stats
165 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
166 | Opt_D_no_debug_output
172 | Opt_WarnIsError -- -Werror; makes warnings fatal
173 | Opt_WarnDuplicateExports
175 | Opt_WarnImplicitPrelude
176 | Opt_WarnIncompletePatterns
177 | Opt_WarnIncompletePatternsRecUpd
178 | Opt_WarnMissingFields
179 | Opt_WarnMissingMethods
180 | Opt_WarnMissingSigs
181 | Opt_WarnNameShadowing
182 | Opt_WarnOverlappingPatterns
183 | Opt_WarnSimplePatterns
184 | Opt_WarnTypeDefaults
185 | Opt_WarnMonomorphism
186 | Opt_WarnUnusedBinds
187 | Opt_WarnUnusedImports
188 | Opt_WarnUnusedMatches
189 | Opt_WarnWarningsDeprecations
190 | Opt_WarnDeprecatedFlags
191 | Opt_WarnDodgyImports
194 | Opt_WarnUnrecognisedPragmas
195 | Opt_WarnDodgyForeignImports
198 | Opt_OverlappingInstances
199 | Opt_UndecidableInstances
200 | Opt_IncoherentInstances
201 | Opt_MonomorphismRestriction
203 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
204 | Opt_ForeignFunctionInterface
205 | Opt_UnliftedFFITypes
206 | Opt_PArr -- Syntactic support for parallel arrays
207 | Opt_Arrows -- Arrow-notation syntax
208 | Opt_TemplateHaskell
211 | Opt_Generics -- "Derivable type classes"
212 | Opt_ImplicitPrelude
213 | Opt_ScopedTypeVariables
217 | Opt_OverloadedStrings
218 | Opt_DisambiguateRecordFields
219 | Opt_RecordWildCards
224 | Opt_StandaloneDeriving
225 | Opt_DeriveDataTypeable
227 | Opt_TypeSynonymInstances
228 | Opt_FlexibleContexts
229 | Opt_FlexibleInstances
230 | Opt_ConstrainedClassMethods
231 | Opt_MultiParamTypeClasses
232 | Opt_FunctionalDependencies
234 | Opt_PolymorphicComponents
235 | Opt_ExistentialQuantification
239 | Opt_ParallelListComp
240 | Opt_TransformListComp
241 | Opt_GeneralizedNewtypeDeriving
243 | Opt_PostfixOperators
245 | Opt_LiberalTypeSynonyms
248 | Opt_ImpredicativeTypes
251 | Opt_NewQualifiedOperators
253 | Opt_PrintExplicitForalls
258 | Opt_StaticArgumentTransformation
262 | Opt_IgnoreInterfacePragmas
263 | Opt_OmitInterfacePragmas
264 | Opt_DoLambdaEtaExpansion
268 | Opt_UnboxStrictFields
271 | Opt_InlineIfEnoughArgs
272 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
274 | Opt_RegsGraph -- do graph coloring register allocation
275 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
278 | Opt_AutoSccsOnAllToplevs
279 | Opt_AutoSccsOnExportedToplevs
280 | Opt_AutoSccsOnIndividualCafs
288 | Opt_ExcessPrecision
289 | Opt_EagerBlackHoling
290 | Opt_ReadUserPackageConf
294 | Opt_HideAllPackages
295 | Opt_PrintBindResult
299 | Opt_BreakOnException
301 | Opt_PrintEvldWithShow
302 | Opt_PrintBindContents
309 | Opt_ConvertToZipCfgAndBack
310 | Opt_AutoLinkPackages
311 | Opt_ImplicitImportQualified
320 | Opt_KeepRawTokenStream
324 -- | Contains not only a collection of 'DynFlag's but also a plethora of
325 -- information relating to the compilation of a single file or GHC session
326 data DynFlags = DynFlags {
329 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
330 stgToDo :: Maybe [StgToDo], -- similarly
331 hscTarget :: HscTarget,
332 hscOutName :: String, -- ^ Name of the output file
333 extCoreName :: String, -- ^ Name of the .hcr output file
334 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
335 optLevel :: Int, -- ^ Optimisation level
336 simplPhases :: Int, -- ^ Number of simplifier phases
337 maxSimplIterations :: Int, -- ^ Max simplifier iterations
338 shouldDumpSimplPhase :: SimplifierMode -> Bool,
339 ruleCheck :: Maybe String,
341 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
342 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
343 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
345 #ifndef OMIT_NATIVE_CODEGEN
346 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
348 stolen_x86_regs :: Int,
349 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
350 importPaths :: [FilePath],
352 mainFunIs :: Maybe String,
353 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
355 dphBackend :: DPHBackend,
357 thisPackage :: PackageId, -- ^ name of package currently being compiled
360 wayNames :: [WayName], -- ^ Way flags from the command line
361 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
362 rtsBuildTag :: String, -- ^ The RTS \"way\"
364 -- For object splitting
365 splitInfo :: Maybe (String,Int),
368 objectDir :: Maybe String,
369 hiDir :: Maybe String,
370 stubDir :: Maybe String,
376 outputFile :: Maybe String,
377 outputHi :: Maybe String,
378 dynLibLoader :: DynLibLoader,
380 -- | This is set by 'DriverPipeline.runPipeline' based on where
381 -- its output is going.
382 dumpPrefix :: Maybe FilePath,
384 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
385 -- Set by @-ddump-file-prefix@
386 dumpPrefixForce :: Maybe FilePath,
388 includePaths :: [String],
389 libraryPaths :: [String],
390 frameworkPaths :: [String], -- used on darwin only
391 cmdlineFrameworks :: [String], -- ditto
392 tmpDir :: String, -- no trailing '/'
394 ghcUsagePath :: FilePath, -- Filled in by SysTools
395 ghciUsagePath :: FilePath, -- ditto
397 hpcDir :: String, -- ^ Path to store the .mix files
399 -- options for particular phases
407 opt_windres :: [String],
409 -- commands for particular phases
411 pgm_P :: (String,[Option]),
413 pgm_c :: (String,[Option]),
414 pgm_m :: (String,[Option]),
415 pgm_s :: (String,[Option]),
416 pgm_a :: (String,[Option]),
417 pgm_l :: (String,[Option]),
418 pgm_dll :: (String,[Option]),
420 pgm_sysman :: String,
421 pgm_windres :: String,
424 depMakefile :: FilePath,
425 depIncludePkgDeps :: Bool,
426 depExcludeMods :: [ModuleName],
427 depSuffixes :: [String],
430 extraPkgConfs :: [FilePath],
431 topDir :: FilePath, -- filled in by SysTools
432 systemPackageConfig :: FilePath, -- ditto
433 -- ^ The @-package-conf@ flags given on the command line, in the order
436 packageFlags :: [PackageFlag],
437 -- ^ The @-package@ and @-hide-package@ flags from the command-line
440 -- NB. do not modify this field, it is calculated by
441 -- Packages.initPackages and Packages.updatePackages.
442 pkgDatabase :: Maybe (UniqFM PackageConfig),
443 pkgState :: PackageState,
446 -- These have to be IORefs, because the defaultCleanupHandler needs to
447 -- know what to clean when an exception happens
448 filesToClean :: IORef [FilePath],
449 dirsToClean :: IORef (FiniteMap FilePath FilePath),
454 -- | Message output action: use "ErrUtils" instead of this if you can
455 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
457 haddockOptions :: Maybe String
460 -- | The target code type of the compilation (if any).
462 -- Whenever you change the target, also make sure to set 'ghcLink' to
463 -- something sensible.
465 -- 'HscNothing' can be used to avoid generating any output, however, note
468 -- * This will not run the desugaring step, thus no warnings generated in
469 -- this step will be output. In particular, this includes warnings related
470 -- to pattern matching. You can run the desugarer manually using
471 -- 'GHC.desugarModule'.
473 -- * If a program uses Template Haskell the typechecker may try to run code
474 -- from an imported module. This will fail if no code has been generated
475 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
476 -- whether this might be the case and choose to either switch to a
477 -- different target or avoid typechecking such modules. (The latter may
478 -- preferable for security reasons.)
481 = HscC -- ^ Generate C code.
482 | HscAsm -- ^ Generate assembly using the native code generator.
483 | HscJava -- ^ Generate Java bytecode.
484 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
485 | HscNothing -- ^ Don't generate any code. See notes above.
488 -- | Will this target result in an object file on the disk?
489 isObjectTarget :: HscTarget -> Bool
490 isObjectTarget HscC = True
491 isObjectTarget HscAsm = True
492 isObjectTarget _ = False
494 -- | The 'GhcMode' tells us whether we're doing multi-module
495 -- compilation (controlled via the "GHC" API) or one-shot
496 -- (single-module) compilation. This makes a difference primarily to
497 -- the "Finder": in one-shot mode we look for interface files for
498 -- imported modules, but in multi-module mode we look for source files
499 -- in order to check whether they need to be recompiled.
501 = CompManager -- ^ @\-\-make@, GHCi, etc.
502 | OneShot -- ^ @ghc -c Foo.hs@
503 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
506 instance Outputable GhcMode where
507 ppr CompManager = ptext (sLit "CompManager")
508 ppr OneShot = ptext (sLit "OneShot")
509 ppr MkDepend = ptext (sLit "MkDepend")
511 isOneShot :: GhcMode -> Bool
512 isOneShot OneShot = True
513 isOneShot _other = False
515 -- | What to do in the link step, if there is one.
517 = NoLink -- ^ Don't link at all
518 | LinkBinary -- ^ Link object code into a binary
519 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
520 -- bytecode and object code).
521 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
524 isNoLink :: GhcLink -> Bool
525 isNoLink NoLink = True
528 -- Is it worth evaluating this Bool and caching it in the DynFlags value
529 -- during initDynFlags?
530 doingTickyProfiling :: DynFlags -> Bool
531 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
534 = ExposePackage String
536 | IgnorePackage String
539 defaultHscTarget :: HscTarget
540 defaultHscTarget = defaultObjectTarget
542 -- | The 'HscTarget' value corresponding to the default way to create
543 -- object files on the current platform.
544 defaultObjectTarget :: HscTarget
546 | cGhcWithNativeCodeGen == "YES" = HscAsm
551 | Wrapped (Maybe String)
555 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
556 initDynFlags :: DynFlags -> IO DynFlags
557 initDynFlags dflags = do
558 -- someday these will be dynamic flags
559 ways <- readIORef v_Ways
560 build_tag <- readIORef v_Build_tag
561 rts_build_tag <- readIORef v_RTS_Build_tag
562 refFilesToClean <- newIORef []
563 refDirsToClean <- newIORef emptyFM
566 buildTag = build_tag,
567 rtsBuildTag = rts_build_tag,
568 filesToClean = refFilesToClean,
569 dirsToClean = refDirsToClean
572 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
573 -- and must be fully initialized by 'GHC.newSession' first.
574 defaultDynFlags :: DynFlags
577 ghcMode = CompManager,
578 ghcLink = LinkBinary,
581 hscTarget = defaultHscTarget,
587 maxSimplIterations = 4,
588 shouldDumpSimplPhase = const False,
590 specConstrThreshold = Just 200,
591 specConstrCount = Just 3,
592 liberateCaseThreshold = Just 200,
593 #ifndef OMIT_NATIVE_CODEGEN
594 targetPlatform = defaultTargetPlatform,
597 cmdlineHcIncludes = [],
601 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
605 thisPackage = mainPackageId,
611 objectSuf = phaseInputExt StopLn,
612 hcSuf = phaseInputExt HCc,
615 outputFile = Nothing,
617 dynLibLoader = Deployable,
618 dumpPrefix = Nothing,
619 dumpPrefixForce = Nothing,
623 cmdlineFrameworks = [],
624 tmpDir = cDEFAULT_TMPDIR,
630 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
641 pkgDatabase = Nothing,
642 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
643 wayNames = panic "defaultDynFlags: No wayNames",
644 buildTag = panic "defaultDynFlags: No buildTag",
645 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
647 -- initSysTools fills all these in
648 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
649 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
650 topDir = panic "defaultDynFlags: No topDir",
651 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
652 pgm_L = panic "defaultDynFlags: No pgm_L",
653 pgm_P = panic "defaultDynFlags: No pgm_P",
654 pgm_F = panic "defaultDynFlags: No pgm_F",
655 pgm_c = panic "defaultDynFlags: No pgm_c",
656 pgm_m = panic "defaultDynFlags: No pgm_m",
657 pgm_s = panic "defaultDynFlags: No pgm_s",
658 pgm_a = panic "defaultDynFlags: No pgm_a",
659 pgm_l = panic "defaultDynFlags: No pgm_l",
660 pgm_dll = panic "defaultDynFlags: No pgm_dll",
661 pgm_T = panic "defaultDynFlags: No pgm_T",
662 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
663 pgm_windres = panic "defaultDynFlags: No pgm_windres",
664 -- end of initSysTools values
666 depMakefile = "Makefile",
667 depIncludePkgDeps = False,
670 -- end of ghc -M values
671 filesToClean = panic "defaultDynFlags: No filesToClean",
672 dirsToClean = panic "defaultDynFlags: No dirsToClean",
673 haddockOptions = Nothing,
675 Opt_AutoLinkPackages,
676 Opt_ReadUserPackageConf,
678 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
679 -- behaviour the default, to see if anyone notices
683 Opt_MonomorphismRestriction,
691 Opt_PrintBindContents
693 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
694 -- The default -O0 options
697 log_action = \severity srcSpan style msg ->
699 SevInfo -> printErrs (msg style)
700 SevFatal -> printErrs (msg style)
703 printErrs ((mkLocMessage srcSpan msg) style)
704 -- careful (#2302): printErrs prints in UTF-8, whereas
705 -- converting to string first and using hPutStr would
706 -- just emit the low 8 bits of each unicode char.
713 0 | print errors & warnings only
714 1 | minimal verbosity: print "compiling M ... done." for each module.
715 2 | equivalent to -dshow-passes
716 3 | equivalent to existing "ghc -v"
717 4 | "ghc -v -ddump-most"
718 5 | "ghc -v -ddump-all"
721 -- | Test whether a 'DynFlag' is set
722 dopt :: DynFlag -> DynFlags -> Bool
723 dopt f dflags = f `elem` (flags dflags)
726 dopt_set :: DynFlags -> DynFlag -> DynFlags
727 dopt_set dfs f = dfs{ flags = f : flags dfs }
729 -- | Unset a 'DynFlag'
730 dopt_unset :: DynFlags -> DynFlag -> DynFlags
731 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
733 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
734 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
735 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
736 -> [a] -- ^ Correctly ordered extracted options
737 getOpts dflags opts = reverse (opts dflags)
738 -- We add to the options from the front, so we need to reverse the list
740 -- | Gets the verbosity flag for the current verbosity level. This is fed to
741 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
742 getVerbFlag :: DynFlags -> String
744 | verbosity dflags >= 3 = "-v"
747 setObjectDir, setHiDir, setStubDir, setOutputDir,
748 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
749 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
750 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
751 addCmdlineFramework, addHaddockOpts
752 :: String -> DynFlags -> DynFlags
753 setOutputFile, setOutputHi, setDumpPrefixForce
754 :: Maybe String -> DynFlags -> DynFlags
756 setObjectDir f d = d{ objectDir = Just f}
757 setHiDir f d = d{ hiDir = Just f}
758 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
759 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
760 -- \#included from the .hc file when compiling with -fvia-C.
761 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
763 setObjectSuf f d = d{ objectSuf = f}
764 setHiSuf f d = d{ hiSuf = f}
765 setHcSuf f d = d{ hcSuf = f}
767 setOutputFile f d = d{ outputFile = f}
768 setOutputHi f d = d{ outputHi = f}
770 parseDynLibLoaderMode f d =
772 ("deploy", "") -> d{ dynLibLoader = Deployable }
773 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
774 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
775 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
776 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
777 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
779 setDumpPrefixForce f d = d { dumpPrefixForce = f}
781 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
782 -- Config.hs should really use Option.
783 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
785 setPgmL f d = d{ pgm_L = f}
786 setPgmF f d = d{ pgm_F = f}
787 setPgmc f d = d{ pgm_c = (f,[])}
788 setPgmm f d = d{ pgm_m = (f,[])}
789 setPgms f d = d{ pgm_s = (f,[])}
790 setPgma f d = d{ pgm_a = (f,[])}
791 setPgml f d = d{ pgm_l = (f,[])}
792 setPgmdll f d = d{ pgm_dll = (f,[])}
793 setPgmwindres f d = d{ pgm_windres = f}
795 addOptL f d = d{ opt_L = f : opt_L d}
796 addOptP f d = d{ opt_P = f : opt_P d}
797 addOptF f d = d{ opt_F = f : opt_F d}
798 addOptc f d = d{ opt_c = f : opt_c d}
799 addOptm f d = d{ opt_m = f : opt_m d}
800 addOpta f d = d{ opt_a = f : opt_a d}
801 addOptl f d = d{ opt_l = f : opt_l d}
802 addOptwindres f d = d{ opt_windres = f : opt_windres d}
804 setDepMakefile :: FilePath -> DynFlags -> DynFlags
805 setDepMakefile f d = d { depMakefile = deOptDep f }
807 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
808 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
810 addDepExcludeMod :: String -> DynFlags -> DynFlags
812 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
814 addDepSuffix :: FilePath -> DynFlags -> DynFlags
815 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
818 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
819 -- we need to strip the "-optdep" off of the arg
820 deOptDep :: String -> String
821 deOptDep x = case maybePrefixMatch "-optdep" x of
825 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
827 addHaddockOpts f d = d{ haddockOptions = Just f}
829 -- -----------------------------------------------------------------------------
830 -- Command-line options
832 -- | When invoking external tools as part of the compilation pipeline, we
833 -- pass these a sequence of options on the command-line. Rather than
834 -- just using a list of Strings, we use a type that allows us to distinguish
835 -- between filepaths and 'other stuff'. The reason for this is that
836 -- this type gives us a handle on transforming filenames, and filenames only,
837 -- to whatever format they're expected to be on a particular platform.
839 = FileOption -- an entry that _contains_ filename(s) / filepaths.
840 String -- a non-filepath prefix that shouldn't be
841 -- transformed (e.g., "/out=")
842 String -- the filepath/filename portion
845 -----------------------------------------------------------------------------
846 -- Setting the optimisation level
848 updOptLevel :: Int -> DynFlags -> DynFlags
849 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
851 = dfs2{ optLevel = final_n }
853 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
854 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
855 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
857 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
858 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
860 optLevelFlags :: [([Int], DynFlag)]
862 = [ ([0], Opt_IgnoreInterfacePragmas)
863 , ([0], Opt_OmitInterfacePragmas)
865 , ([1,2], Opt_IgnoreAsserts)
866 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
868 , ([1,2], Opt_DoEtaReduction)
869 , ([1,2], Opt_CaseMerge)
870 , ([1,2], Opt_Strictness)
872 , ([1,2], Opt_FullLaziness)
874 , ([2], Opt_LiberateCase)
875 , ([2], Opt_SpecConstr)
877 -- , ([2], Opt_StaticArgumentTransformation)
878 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
879 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
880 -- several improvements to the heuristics, and I'm concerned that without
881 -- those changes SAT will interfere with some attempts to write "high
882 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
883 -- this year. In particular, the version in HEAD lacks the tail call
884 -- criterion, so many things that look like reasonable loops will be
885 -- turned into functions with extra (unneccesary) thunk creation.
887 , ([0,1,2], Opt_DoLambdaEtaExpansion)
888 -- This one is important for a tiresome reason:
889 -- we want to make sure that the bindings for data
890 -- constructors are eta-expanded. This is probably
891 -- a good thing anyway, but it seems fragile.
894 -- -----------------------------------------------------------------------------
895 -- Standard sets of warning options
897 standardWarnings :: [DynFlag]
899 = [ Opt_WarnWarningsDeprecations,
900 Opt_WarnDeprecatedFlags,
901 Opt_WarnUnrecognisedPragmas,
902 Opt_WarnOverlappingPatterns,
903 Opt_WarnMissingFields,
904 Opt_WarnMissingMethods,
905 Opt_WarnDuplicateExports,
906 Opt_WarnDodgyForeignImports
909 minusWOpts :: [DynFlag]
911 = standardWarnings ++
912 [ Opt_WarnUnusedBinds,
913 Opt_WarnUnusedMatches,
914 Opt_WarnUnusedImports,
915 Opt_WarnIncompletePatterns,
919 minusWallOpts :: [DynFlag]
922 [ Opt_WarnTypeDefaults,
923 Opt_WarnNameShadowing,
929 -- minuswRemovesOpts should be every warning option
930 minuswRemovesOpts :: [DynFlag]
933 [Opt_WarnImplicitPrelude,
934 Opt_WarnIncompletePatternsRecUpd,
935 Opt_WarnSimplePatterns,
936 Opt_WarnMonomorphism,
937 Opt_WarnUnrecognisedPragmas,
941 -- -----------------------------------------------------------------------------
942 -- CoreToDo: abstraction of core-to-core passes to run.
944 data CoreToDo -- These are diff core-to-core passes,
945 -- which may be invoked in any order,
946 -- as many times as you like.
948 = CoreDoSimplify -- The core-to-core simplifier.
951 -- Each run of the simplifier can take a different
952 -- set of simplifier-specific flags.
954 | CoreDoFloatOutwards FloatOutSwitches
959 | CoreDoWorkerWrapper
962 | CoreDoOldStrictness
965 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
966 -- matching this string
967 | CoreDoVectorisation PackageId
968 | CoreDoNothing -- Useful when building up
969 | CoreDoPasses [CoreToDo] -- lists of these things
972 data SimplifierMode -- See comments in SimplMonad
974 | SimplPhase Int [String]
976 instance Outputable SimplifierMode where
977 ppr SimplGently = ptext (sLit "gentle")
978 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
981 data SimplifierSwitch
982 = MaxSimplifierIterations Int
986 data FloatOutSwitches = FloatOutSwitches {
987 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
988 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
989 -- even if they do not escape a lambda
992 instance Outputable FloatOutSwitches where
993 ppr = pprFloatOutSwitches
995 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
996 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
997 <+> pp_not (floatOutConstants sw) <+> text "constants"
1000 pp_not False = text "not"
1002 -- | Switches that specify the minimum amount of floating out
1003 -- gentleFloatOutSwitches :: FloatOutSwitches
1004 -- gentleFloatOutSwitches = FloatOutSwitches False False
1006 -- | Switches that do not specify floating out of lambdas, just of constants
1007 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1008 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1011 -- The core-to-core pass ordering is derived from the DynFlags:
1012 runWhen :: Bool -> CoreToDo -> CoreToDo
1013 runWhen True do_this = do_this
1014 runWhen False _ = CoreDoNothing
1016 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1017 runMaybe (Just x) f = f x
1018 runMaybe Nothing _ = CoreDoNothing
1020 getCoreToDo :: DynFlags -> [CoreToDo]
1022 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1023 | otherwise = core_todo
1025 opt_level = optLevel dflags
1026 phases = simplPhases dflags
1027 max_iter = maxSimplIterations dflags
1028 strictness = dopt Opt_Strictness dflags
1029 full_laziness = dopt Opt_FullLaziness dflags
1030 cse = dopt Opt_CSE dflags
1031 spec_constr = dopt Opt_SpecConstr dflags
1032 liberate_case = dopt Opt_LiberateCase dflags
1033 rule_check = ruleCheck dflags
1034 static_args = dopt Opt_StaticArgumentTransformation dflags
1036 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1038 simpl_phase phase names iter
1040 [ CoreDoSimplify (SimplPhase phase names) [
1041 MaxSimplifierIterations iter
1043 maybe_rule_check phase
1047 = runWhen (dopt Opt_Vectorise dflags)
1048 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1051 -- By default, we have 2 phases before phase 0.
1053 -- Want to run with inline phase 2 after the specialiser to give
1054 -- maximum chance for fusion to work before we inline build/augment
1055 -- in phase 1. This made a difference in 'ansi' where an
1056 -- overloaded function wasn't inlined till too late.
1058 -- Need phase 1 so that build/augment get
1059 -- inlined. I found that spectral/hartel/genfft lost some useful
1060 -- strictness in the function sumcode' if augment is not inlined
1061 -- before strictness analysis runs
1062 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1063 | phase <- [phases, phases-1 .. 1] ]
1066 -- initial simplify: mk specialiser happy: minimum effort please
1067 simpl_gently = CoreDoSimplify SimplGently [
1068 -- Simplify "gently"
1069 -- Don't inline anything till full laziness has bitten
1070 -- In particular, inlining wrappers inhibits floating
1071 -- e.g. ...(case f x of ...)...
1072 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1073 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1074 -- and now the redex (f x) isn't floatable any more
1075 -- Similarly, don't apply any rules until after full
1076 -- laziness. Notably, list fusion can prevent floating.
1078 NoCaseOfCase, -- Don't do case-of-case transformations.
1079 -- This makes full laziness work better
1080 MaxSimplifierIterations max_iter
1084 if opt_level == 0 then
1086 simpl_phase 0 ["final"] max_iter]
1087 else {- opt_level >= 1 -} [
1089 -- We want to do the static argument transform before full laziness as it
1090 -- may expose extra opportunities to float things outwards. However, to fix
1091 -- up the output of the transformation we need at do at least one simplify
1092 -- after this before anything else
1093 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1095 -- We run vectorisation here for now, but we might also try to run
1099 -- initial simplify: mk specialiser happy: minimum effort please
1102 -- Specialisation is best done before full laziness
1103 -- so that overloaded functions have all their dictionary lambdas manifest
1106 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1107 -- Was: gentleFloatOutSwitches
1108 -- I have no idea why, but not floating constants to top level is
1109 -- very bad in some cases.
1110 -- Notably: p_ident in spectral/rewrite
1111 -- Changing from "gentle" to "constantsOnly" improved
1112 -- rewrite's allocation by 19%, and made 0.0% difference
1113 -- to any other nofib benchmark
1119 -- Phase 0: allow all Ids to be inlined now
1120 -- This gets foldr inlined before strictness analysis
1122 -- At least 3 iterations because otherwise we land up with
1123 -- huge dead expressions because of an infelicity in the
1125 -- let k = BIG in foldr k z xs
1126 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1127 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1129 simpl_phase 0 ["main"] (max max_iter 3),
1132 #ifdef OLD_STRICTNESS
1133 CoreDoOldStrictness,
1135 runWhen strictness (CoreDoPasses [
1137 CoreDoWorkerWrapper,
1139 simpl_phase 0 ["post-worker-wrapper"] max_iter
1142 runWhen full_laziness
1143 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1144 -- nofib/spectral/hartel/wang doubles in speed if you
1145 -- do full laziness late in the day. It only happens
1146 -- after fusion and other stuff, so the early pass doesn't
1147 -- catch it. For the record, the redex is
1148 -- f_el22 (f_el21 r_midblock)
1151 runWhen cse CoreCSE,
1152 -- We want CSE to follow the final full-laziness pass, because it may
1153 -- succeed in commoning up things floated out by full laziness.
1154 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1160 -- Case-liberation for -O2. This should be after
1161 -- strictness analysis and the simplification which follows it.
1162 runWhen liberate_case (CoreDoPasses [
1164 simpl_phase 0 ["post-liberate-case"] max_iter
1165 ]), -- Run the simplifier after LiberateCase to vastly
1166 -- reduce the possiblility of shadowing
1167 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1169 runWhen spec_constr CoreDoSpecConstr,
1173 -- Final clean-up simplification:
1174 simpl_phase 0 ["final"] max_iter
1177 -- -----------------------------------------------------------------------------
1178 -- StgToDo: abstraction of stg-to-stg passes to run.
1181 = StgDoMassageForProfiling -- should be (next to) last
1182 -- There's also setStgVarInfo, but its absolute "lastness"
1183 -- is so critical that it is hardwired in (no flag).
1186 getStgToDo :: DynFlags -> [StgToDo]
1188 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1191 stg_stats = dopt Opt_StgStats dflags
1193 todo1 = if stg_stats then [D_stg_stats] else []
1195 todo2 | WayProf `elem` wayNames dflags
1196 = StgDoMassageForProfiling : todo1
1200 -- -----------------------------------------------------------------------------
1203 allFlags :: [String]
1204 allFlags = map ('-':) $
1205 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1206 map ("fno-"++) flags ++
1207 map ("f"++) flags ++
1208 map ("X"++) supportedLanguages ++
1209 map ("XNo"++) supportedLanguages
1210 where ok (PrefixPred _ _) = False
1212 flags = [ name | (name, _, _) <- fFlags ]
1214 dynamic_flags :: [Flag DynP]
1216 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1217 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1218 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1219 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1220 , Flag "v" (OptIntSuffix setVerbosity) Supported
1222 ------- Specific phases --------------------------------------------
1223 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1224 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1225 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1226 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1227 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1228 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1229 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1230 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1231 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1232 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1234 , Flag "optL" (HasArg (upd . addOptL)) Supported
1235 , Flag "optP" (HasArg (upd . addOptP)) Supported
1236 , Flag "optF" (HasArg (upd . addOptF)) Supported
1237 , Flag "optc" (HasArg (upd . addOptc)) Supported
1238 , Flag "optm" (HasArg (upd . addOptm)) Supported
1239 , Flag "opta" (HasArg (upd . addOpta)) Supported
1240 , Flag "optl" (HasArg (upd . addOptl)) Supported
1241 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1244 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1247 -------- ghc -M -----------------------------------------------------
1248 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1249 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1250 (Deprecated "Use -dep-suffix instead")
1251 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1252 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1253 (Deprecated "Use -dep-makefile instead")
1254 , Flag "optdep-w" (NoArg (return ()))
1255 (Deprecated "-optdep-w doesn't do anything")
1256 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1257 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1258 (Deprecated "Use -include-pkg-deps instead")
1259 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1260 (Deprecated "Use -include-pkg-deps instead")
1261 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1262 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1263 (Deprecated "Use -exclude-module instead")
1264 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1265 (Deprecated "Use -exclude-module instead")
1267 -------- Linking ----------------------------------------------------
1268 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1270 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1271 (Deprecated "Use -c instead")
1272 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1274 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1277 ------- Libraries ---------------------------------------------------
1278 , Flag "L" (Prefix addLibraryPath ) Supported
1279 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1281 ------- Frameworks --------------------------------------------------
1282 -- -framework-path should really be -F ...
1283 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1284 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1286 ------- Output Redirection ------------------------------------------
1287 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1288 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1289 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1290 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1291 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1292 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1293 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1294 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1295 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1296 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1297 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1300 ------- Keeping temporary files -------------------------------------
1301 -- These can be singular (think ghc -c) or plural (think ghc --make)
1302 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1303 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1304 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1305 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1306 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1307 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1308 -- This only makes sense as plural
1309 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1311 ------- Miscellaneous ----------------------------------------------
1312 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1313 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1314 , Flag "main-is" (SepArg setMainIs ) Supported
1315 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1316 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1317 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1319 ------- recompilation checker --------------------------------------
1320 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1321 (Deprecated "Use -fno-force-recomp instead")
1322 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1323 (Deprecated "Use -fforce-recomp instead")
1325 ------ HsCpp opts ---------------------------------------------------
1326 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1327 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1329 ------- Include/Import Paths ----------------------------------------
1330 , Flag "I" (Prefix addIncludePath) Supported
1331 , Flag "i" (OptPrefix addImportPath ) Supported
1333 ------ Debugging ----------------------------------------------------
1334 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1336 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1338 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1340 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1342 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1344 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1346 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1348 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1350 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1352 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1354 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1356 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1358 , Flag "ddump-asm-regalloc-stages"
1359 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1361 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1363 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1365 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1367 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1369 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1371 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1373 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1375 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1377 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1379 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1381 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1383 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1385 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1387 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1389 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1391 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1393 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1395 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1397 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1399 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1401 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1403 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1405 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1407 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1409 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1411 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1413 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1415 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1417 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1419 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1421 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1423 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1425 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1427 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1429 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1431 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1433 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1435 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1437 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1439 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1441 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1443 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1445 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1448 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1450 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1452 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1454 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1456 , Flag "dshow-passes"
1457 (NoArg (do forceRecompile
1458 setVerbosity (Just 2)))
1460 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1463 ------ Machine dependant (-m<blah>) stuff ---------------------------
1465 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1467 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1469 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1472 ------ Warning opts -------------------------------------------------
1473 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1475 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1477 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1479 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1481 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1482 (Deprecated "Use -w instead")
1483 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1486 ------ Optimisation flags ------------------------------------------
1487 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1488 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1489 (Deprecated "Use -O0 instead")
1490 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1491 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1493 -- If the number is missing, use 1
1495 , Flag "fsimplifier-phases"
1496 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1498 , Flag "fmax-simplifier-iterations"
1499 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1502 , Flag "fspec-constr-threshold"
1503 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1505 , Flag "fno-spec-constr-threshold"
1506 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1508 , Flag "fspec-constr-count"
1509 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1511 , Flag "fno-spec-constr-count"
1512 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1514 , Flag "fliberate-case-threshold"
1515 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1517 , Flag "fno-liberate-case-threshold"
1518 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1521 , Flag "frule-check"
1522 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1524 , Flag "fcontext-stack"
1525 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1528 ------ Profiling ----------------------------------------------------
1530 -- XXX Should the -f* flags be deprecated?
1531 -- They don't seem to be documented
1532 , Flag "fauto-sccs-on-all-toplevs"
1533 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1536 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1538 , Flag "no-auto-all"
1539 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1541 , Flag "fauto-sccs-on-exported-toplevs"
1542 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1545 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1548 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1550 , Flag "fauto-sccs-on-individual-cafs"
1551 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1554 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1557 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1560 ------ DPH flags ----------------------------------------------------
1563 (NoArg (setDPHBackend DPHSeq))
1566 (NoArg (setDPHBackend DPHPar))
1569 (NoArg (setDPHBackend DPHThis))
1572 ------ Compiler flags -----------------------------------------------
1574 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1575 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1576 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1578 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1579 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1580 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1582 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1584 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1587 ++ map (mkFlag True "f" setDynFlag ) fFlags
1588 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1589 ++ map (mkFlag True "X" setDynFlag ) xFlags
1590 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1592 package_flags :: [Flag DynP]
1594 ------- Packages ----------------------------------------------------
1595 Flag "package-conf" (HasArg extraPkgConf_) Supported
1596 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1598 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1599 , Flag "package" (HasArg exposePackage) Supported
1600 , Flag "hide-package" (HasArg hidePackage) Supported
1601 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1603 , Flag "ignore-package" (HasArg ignorePackage)
1605 , Flag "syslib" (HasArg exposePackage)
1606 (Deprecated "Use -package instead")
1609 mkFlag :: Bool -- ^ True <=> it should be turned on
1610 -> String -- ^ The flag prefix
1611 -> (DynFlag -> DynP ())
1612 -> (String, DynFlag, Bool -> Deprecated)
1614 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1615 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1617 deprecatedForLanguage :: String -> Bool -> Deprecated
1618 deprecatedForLanguage lang turn_on
1619 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1621 flag | turn_on = lang
1622 | otherwise = "No"++lang
1624 useInstead :: String -> Bool -> Deprecated
1625 useInstead flag turn_on
1626 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1628 no = if turn_on then "" else "no-"
1630 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1631 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1633 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1634 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1635 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1636 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1637 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1638 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1639 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1640 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1641 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1642 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1643 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1644 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1645 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1646 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1647 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1648 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1649 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1650 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1651 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1652 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1653 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1654 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1655 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1656 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1657 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1658 ( "strictness", Opt_Strictness, const Supported ),
1659 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1660 ( "full-laziness", Opt_FullLaziness, const Supported ),
1661 ( "liberate-case", Opt_LiberateCase, const Supported ),
1662 ( "spec-constr", Opt_SpecConstr, const Supported ),
1663 ( "cse", Opt_CSE, const Supported ),
1664 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1665 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1666 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1667 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1668 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1669 ( "case-merge", Opt_CaseMerge, const Supported ),
1670 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1671 ( "method-sharing", Opt_MethodSharing, const Supported ),
1672 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1673 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1674 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1675 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1676 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1677 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1678 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1679 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1680 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1681 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1682 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1683 ( "break-on-error", Opt_BreakOnError, const Supported ),
1684 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1685 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1686 ( "run-cps", Opt_RunCPS, const Supported ),
1687 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1688 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1689 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1690 ( "vectorise", Opt_Vectorise, const Supported ),
1691 ( "regs-graph", Opt_RegsGraph, const Supported ),
1692 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1693 ( "th", Opt_TemplateHaskell,
1694 deprecatedForLanguage "TemplateHaskell" ),
1695 ( "fi", Opt_ForeignFunctionInterface,
1696 deprecatedForLanguage "ForeignFunctionInterface" ),
1697 ( "ffi", Opt_ForeignFunctionInterface,
1698 deprecatedForLanguage "ForeignFunctionInterface" ),
1699 ( "arrows", Opt_Arrows,
1700 deprecatedForLanguage "Arrows" ),
1701 ( "generics", Opt_Generics,
1702 deprecatedForLanguage "Generics" ),
1703 ( "implicit-prelude", Opt_ImplicitPrelude,
1704 deprecatedForLanguage "ImplicitPrelude" ),
1705 ( "bang-patterns", Opt_BangPatterns,
1706 deprecatedForLanguage "BangPatterns" ),
1707 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1708 deprecatedForLanguage "MonomorphismRestriction" ),
1709 ( "mono-pat-binds", Opt_MonoPatBinds,
1710 deprecatedForLanguage "MonoPatBinds" ),
1711 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1712 deprecatedForLanguage "ExtendedDefaultRules" ),
1713 ( "implicit-params", Opt_ImplicitParams,
1714 deprecatedForLanguage "ImplicitParams" ),
1715 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1716 deprecatedForLanguage "ScopedTypeVariables" ),
1718 deprecatedForLanguage "PArr" ),
1719 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1720 deprecatedForLanguage "OverlappingInstances" ),
1721 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1722 deprecatedForLanguage "UndecidableInstances" ),
1723 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1724 deprecatedForLanguage "IncoherentInstances" ),
1725 ( "gen-manifest", Opt_GenManifest, const Supported ),
1726 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1727 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1730 supportedLanguages :: [String]
1731 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1733 -- This may contain duplicates
1734 languageOptions :: [DynFlag]
1735 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1737 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1738 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1740 ( "CPP", Opt_Cpp, const Supported ),
1741 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1742 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1743 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1744 ( "MagicHash", Opt_MagicHash, const Supported ),
1745 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1746 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1747 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1748 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1749 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1750 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1751 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1752 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1753 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1754 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1755 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1756 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1757 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1758 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1759 ( "Arrows", Opt_Arrows, const Supported ),
1760 ( "PArr", Opt_PArr, const Supported ),
1761 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1762 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1763 ( "Generics", Opt_Generics, const Supported ),
1765 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1766 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1767 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1768 ( "RecordPuns", Opt_RecordPuns,
1769 deprecatedForLanguage "NamedFieldPuns" ),
1770 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1771 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1772 ( "GADTs", Opt_GADTs, const Supported ),
1773 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1774 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1775 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1777 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1778 -- On by default (which is not strictly H98):
1779 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1780 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1781 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1782 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1783 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1785 ( "PatternSignatures", Opt_ScopedTypeVariables,
1786 deprecatedForLanguage "ScopedTypeVariables" ),
1788 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1789 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1790 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1791 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1792 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1793 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1794 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1795 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1796 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1797 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1798 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1799 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1800 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1801 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1802 ( "PackageImports", Opt_PackageImports, const Supported ),
1803 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1806 impliedFlags :: [(DynFlag, DynFlag)]
1808 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1809 -- be completely rigid for GADTs
1811 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1812 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1813 -- all over the place
1815 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1816 -- Note [Scoped tyvars] in TcBinds
1817 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1820 glasgowExtsFlags :: [DynFlag]
1821 glasgowExtsFlags = [
1822 Opt_PrintExplicitForalls
1823 , Opt_ForeignFunctionInterface
1824 , Opt_UnliftedFFITypes
1826 , Opt_ImplicitParams
1827 , Opt_ScopedTypeVariables
1829 , Opt_TypeSynonymInstances
1830 , Opt_StandaloneDeriving
1831 , Opt_DeriveDataTypeable
1833 , Opt_FlexibleContexts
1834 , Opt_FlexibleInstances
1835 , Opt_ConstrainedClassMethods
1836 , Opt_MultiParamTypeClasses
1837 , Opt_FunctionalDependencies
1839 , Opt_PolymorphicComponents
1840 , Opt_ExistentialQuantification
1842 , Opt_PostfixOperators
1844 , Opt_LiberalTypeSynonyms
1848 , Opt_ParallelListComp
1849 , Opt_EmptyDataDecls
1850 , Opt_KindSignatures
1851 , Opt_GeneralizedNewtypeDeriving
1852 , Opt_TypeFamilies ]
1854 -- -----------------------------------------------------------------------------
1855 -- Parsing the dynamic flags.
1857 -- | Parse dynamic flags from a list of command line arguments. Returns the
1858 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1859 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1860 -- flags or missing arguments).
1861 parseDynamicFlags :: Monad m =>
1862 DynFlags -> [Located String]
1863 -> m (DynFlags, [Located String], [Located String])
1864 -- ^ Updated 'DynFlags', left-over arguments, and
1865 -- list of warnings.
1866 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1868 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1869 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1870 parseDynamicNoPackageFlags :: Monad m =>
1871 DynFlags -> [Located String]
1872 -> m (DynFlags, [Located String], [Located String])
1873 -- ^ Updated 'DynFlags', left-over arguments, and
1874 -- list of warnings.
1875 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1877 parseDynamicFlags_ :: Monad m =>
1878 DynFlags -> [Located String] -> Bool
1879 -> m (DynFlags, [Located String], [Located String])
1880 parseDynamicFlags_ dflags args pkg_flags = do
1881 -- XXX Legacy support code
1882 -- We used to accept things like
1883 -- optdep-f -optdepdepend
1884 -- optdep-f -optdep depend
1885 -- optdep -f -optdepdepend
1886 -- optdep -f -optdep depend
1887 -- but the spaces trip up proper argument handling. So get rid of them.
1888 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1889 f (x : xs) = x : f xs
1893 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1894 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1895 | otherwise = dynamic_flags
1897 let ((leftover, errs, warns), dflags')
1898 = runCmdLine (processArgs flag_spec args') dflags
1899 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1900 return (dflags', leftover, warns)
1902 type DynP = CmdLineP DynFlags
1904 upd :: (DynFlags -> DynFlags) -> DynP ()
1906 dfs <- getCmdLineState
1907 putCmdLineState $! (f dfs)
1909 --------------------------
1910 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1911 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1912 ; mapM_ setDynFlag deps }
1914 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1915 -- When you set f, set the ones it implies
1916 -- NB: use setDynFlag recursively, in case the implied flags
1917 -- implies further flags
1918 -- When you un-set f, however, we don't un-set the things it implies
1919 -- (except for -fno-glasgow-exts, which is treated specially)
1921 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1923 --------------------------
1924 setDumpFlag :: DynFlag -> OptKind DynP
1925 setDumpFlag dump_flag
1926 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1928 -- Certain dumpy-things are really interested in what's going
1929 -- on during recompilation checking, so in those cases we
1930 -- don't want to turn it off.
1931 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1932 Opt_D_dump_hi_diffs]
1934 forceRecompile :: DynP ()
1935 -- Whenver we -ddump, force recompilation (by switching off the
1936 -- recompilation checker), else you don't see the dump! However,
1937 -- don't switch it off in --make mode, else *everything* gets
1938 -- recompiled which probably isn't what you want
1939 forceRecompile = do { dfs <- getCmdLineState
1940 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1942 force_recomp dfs = isOneShot (ghcMode dfs)
1944 setVerboseCore2Core :: DynP ()
1945 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1947 upd (\s -> s { shouldDumpSimplPhase = const True })
1949 setDumpSimplPhases :: String -> DynP ()
1950 setDumpSimplPhases s = do forceRecompile
1951 upd (\s -> s { shouldDumpSimplPhase = spec })
1953 spec :: SimplifierMode -> Bool
1955 . map (join (&&) . map match . split ':')
1961 join :: (Bool -> Bool -> Bool)
1962 -> [SimplifierMode -> Bool]
1963 -> SimplifierMode -> Bool
1964 join _ [] = const True
1965 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1967 match :: String -> SimplifierMode -> Bool
1968 match "" = const True
1969 match s = case reads s of
1970 [(n,"")] -> phase_num n
1973 phase_num :: Int -> SimplifierMode -> Bool
1974 phase_num n (SimplPhase k _) = n == k
1975 phase_num _ _ = False
1977 phase_name :: String -> SimplifierMode -> Bool
1978 phase_name s SimplGently = s == "gentle"
1979 phase_name s (SimplPhase _ ss) = s `elem` ss
1981 setVerbosity :: Maybe Int -> DynP ()
1982 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1984 addCmdlineHCInclude :: String -> DynP ()
1985 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1987 extraPkgConf_ :: FilePath -> DynP ()
1988 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1990 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1992 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1994 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1996 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1998 setPackageName :: String -> DynFlags -> DynFlags
2000 | Nothing <- unpackPackageId pid
2001 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2003 = \s -> s{ thisPackage = pid }
2005 pid = stringToPackageId p
2007 -- If we're linking a binary, then only targets that produce object
2008 -- code are allowed (requests for other target types are ignored).
2009 setTarget :: HscTarget -> DynP ()
2010 setTarget l = upd set
2013 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2016 -- Changes the target only if we're compiling object code. This is
2017 -- used by -fasm and -fvia-C, which switch from one to the other, but
2018 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2019 -- can be safely used in an OPTIONS_GHC pragma.
2020 setObjTarget :: HscTarget -> DynP ()
2021 setObjTarget l = upd set
2024 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2027 setOptLevel :: Int -> DynFlags -> DynFlags
2028 setOptLevel n dflags
2029 | hscTarget dflags == HscInterpreted && n > 0
2031 -- not in IO any more, oh well:
2032 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2034 = updOptLevel n dflags
2037 -- -Odph is equivalent to
2039 -- -O2 optimise as much as possible
2040 -- -fno-method-sharing sharing specialisation defeats fusion
2042 -- -fdicts-cheap always inline dictionaries
2043 -- -fmax-simplifier-iterations20 this is necessary sometimes
2044 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2045 -- -fno-spec-constr-count SpecConstr as much as possible
2046 -- -finline-enough-args hack to prevent excessive inlining
2048 setDPHOpt :: DynFlags -> DynFlags
2049 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2050 , specConstrThreshold = Nothing
2051 , specConstrCount = Nothing
2053 `dopt_set` Opt_DictsCheap
2054 `dopt_unset` Opt_MethodSharing
2055 `dopt_set` Opt_InlineIfEnoughArgs
2057 data DPHBackend = DPHPar
2060 deriving(Eq, Ord, Enum, Show)
2062 setDPHBackend :: DPHBackend -> DynP ()
2063 setDPHBackend backend
2065 upd $ \dflags -> dflags { dphBackend = backend }
2066 mapM_ exposePackage (dph_packages backend)
2068 dph_packages DPHThis = []
2069 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2070 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2072 dphPackage :: DynFlags -> PackageId
2073 dphPackage dflags = case dphBackend dflags of
2074 DPHPar -> dphParPackageId
2075 DPHSeq -> dphSeqPackageId
2076 DPHThis -> thisPackage dflags
2078 setMainIs :: String -> DynP ()
2080 | not (null main_fn) && isLower (head main_fn)
2081 -- The arg looked like "Foo.Bar.baz"
2082 = upd $ \d -> d{ mainFunIs = Just main_fn,
2083 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2085 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2086 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2088 | otherwise -- The arg looked like "baz"
2089 = upd $ \d -> d{ mainFunIs = Just arg }
2091 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2093 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
2094 -- Either returns the default name or the one configured on the command line with -main-is
2095 getMainFun :: DynFlags -> RdrName
2096 getMainFun dflags = case (mainFunIs dflags) of
2097 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
2098 Nothing -> main_RDR_Unqual
2100 -----------------------------------------------------------------------------
2101 -- Paths & Libraries
2103 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2105 -- -i on its own deletes the import paths
2106 addImportPath "" = upd (\s -> s{importPaths = []})
2107 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2111 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2114 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2116 addFrameworkPath p =
2117 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2119 #ifndef mingw32_TARGET_OS
2120 split_marker :: Char
2121 split_marker = ':' -- not configurable (ToDo)
2124 splitPathList :: String -> [String]
2125 splitPathList s = filter notNull (splitUp s)
2126 -- empty paths are ignored: there might be a trailing
2127 -- ':' in the initial list, for example. Empty paths can
2128 -- cause confusion when they are translated into -I options
2129 -- for passing to gcc.
2131 #ifndef mingw32_TARGET_OS
2132 splitUp xs = split split_marker xs
2134 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2136 -- That is, if "foo:bar:baz" is used, this interpreted as
2137 -- consisting of three entries, 'foo', 'bar', 'baz'.
2138 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2139 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2141 -- Notice that no attempt is made to fully replace the 'standard'
2142 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2143 -- that this will cause too much breakage for users & ':' will
2144 -- work fine even with DOS paths, if you're not insisting on being silly.
2147 splitUp (x:':':div:xs) | div `elem` dir_markers
2148 = ((x:':':div:p): splitUp rs)
2150 (p,rs) = findNextPath xs
2151 -- we used to check for existence of the path here, but that
2152 -- required the IO monad to be threaded through the command-line
2153 -- parser which is quite inconvenient. The
2154 splitUp xs = cons p (splitUp rs)
2156 (p,rs) = findNextPath xs
2161 -- will be called either when we've consumed nought or the
2162 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2163 -- finding the next split marker.
2165 case break (`elem` split_markers) xs of
2166 (p, _:ds) -> (p, ds)
2169 split_markers :: [Char]
2170 split_markers = [':', ';']
2172 dir_markers :: [Char]
2173 dir_markers = ['/', '\\']
2176 -- -----------------------------------------------------------------------------
2177 -- tmpDir, where we store temporary files.
2179 setTmpDir :: FilePath -> DynFlags -> DynFlags
2180 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2181 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2182 -- seem necessary now --SDM 7/2/2008
2184 -----------------------------------------------------------------------------
2187 setOptHpcDir :: String -> DynP ()
2188 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2190 -----------------------------------------------------------------------------
2191 -- Via-C compilation stuff
2193 -- There are some options that we need to pass to gcc when compiling
2194 -- Haskell code via C, but are only supported by recent versions of
2195 -- gcc. The configure script decides which of these options we need,
2196 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2197 -- read before each via-C compilation. The advantage of having these
2198 -- in a separate file is that the file can be created at install-time
2199 -- depending on the available gcc version, and even re-generated later
2200 -- if gcc is upgraded.
2202 -- The options below are not dependent on the version of gcc, only the
2205 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2206 [String]) -- for registerised HC compilations
2207 machdepCCOpts _dflags
2208 #if alpha_TARGET_ARCH
2210 #ifdef HAVE_THREADED_RTS_SUPPORT
2214 -- For now, to suppress the gcc warning "call-clobbered
2215 -- register used for global register variable", we simply
2216 -- disable all warnings altogether using the -w flag. Oh well.
2218 #elif hppa_TARGET_ARCH
2219 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2220 -- (very nice, but too bad the HP /usr/include files don't agree.)
2221 = ( ["-D_HPUX_SOURCE"], [] )
2223 #elif m68k_TARGET_ARCH
2224 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2225 -- popping of args to routines to be explicit; if we let things
2226 -- be deferred 'til after an STGJUMP, imminent death is certain!
2228 -- -fomit-frame-pointer : *don't*
2229 -- It's better to have a6 completely tied up being a frame pointer
2230 -- rather than let GCC pick random things to do with it.
2231 -- (If we want to steal a6, then we would try to do things
2232 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2233 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2235 #elif i386_TARGET_ARCH
2236 -- -fno-defer-pop : basically the same game as for m68k
2238 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2239 -- the fp (%ebp) for our register maps.
2240 = let n_regs = stolen_x86_regs _dflags
2243 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2246 "-fomit-frame-pointer",
2247 -- we want -fno-builtin, because when gcc inlines
2248 -- built-in functions like memcpy() it tends to
2249 -- run out of registers, requiring -monly-n-regs
2251 "-DSTOLEN_X86_REGS="++show n_regs ]
2254 #elif ia64_TARGET_ARCH
2255 = ( [], ["-fomit-frame-pointer", "-G0"] )
2257 #elif x86_64_TARGET_ARCH
2258 = ( [], ["-fomit-frame-pointer",
2259 "-fno-asynchronous-unwind-tables",
2260 -- the unwind tables are unnecessary for HC code,
2261 -- and get in the way of -split-objs. Another option
2262 -- would be to throw them away in the mangler, but this
2265 -- calling builtins like strlen() using the FFI can
2266 -- cause gcc to run out of regs, so use the external
2270 #elif sparc_TARGET_ARCH
2272 -- For now, to suppress the gcc warning "call-clobbered
2273 -- register used for global register variable", we simply
2274 -- disable all warnings altogether using the -w flag. Oh well.
2276 #elif powerpc_apple_darwin_TARGET
2278 -- Disable Apple's precompiling preprocessor. It's a great thing
2279 -- for "normal" programs, but it doesn't support register variable
2281 = ( [], ["-no-cpp-precomp"] )
2286 picCCOpts :: DynFlags -> [String]
2288 #if darwin_TARGET_OS
2289 -- Apple prefers to do things the other way round.
2290 -- PIC is on by default.
2291 -- -mdynamic-no-pic:
2292 -- Turn off PIC code generation.
2294 -- Don't generate "common" symbols - these are unwanted
2295 -- in dynamic libraries.
2298 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2300 = ["-mdynamic-no-pic"]
2301 #elif mingw32_TARGET_OS
2302 -- no -fPIC for Windows
2304 = ["-U __PIC__","-D__PIC__"]
2309 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2314 -- -----------------------------------------------------------------------------
2318 can_split = cSplitObjs == "YES"
2320 -- -----------------------------------------------------------------------------
2323 compilerInfo :: [(String, String)]
2324 compilerInfo = [("Project name", cProjectName),
2325 ("Project version", cProjectVersion),
2326 ("Booter version", cBooterVersion),
2328 ("Interface file version", cHscIfaceFileVersion),
2329 ("Have interpreter", cGhcWithInterpreter),
2330 ("Object splitting", cSplitObjs),
2331 ("Have native code generator", cGhcWithNativeCodeGen),
2332 ("Support SMP", cGhcWithSMP),
2333 ("Unregisterised", cGhcUnregisterised),
2334 ("Tables next to code", cGhcEnableTablesNextToCode),
2335 ("Win32 DLLs", cEnableWin32DLLs),
2336 ("RTS ways", cGhcRTSWays),
2337 ("Leading underscore", cLeadingUnderscore),
2338 ("Debug on", show debugIsOn)