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 #if defined(i386_TARGET_ARCH) || (!defined(mingw32_TARGET_OS) && !defined(darwin_TARGET_OS))
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
123 | Opt_D_dump_asm_expanded
129 | Opt_D_dump_inlinings
130 | Opt_D_dump_rule_firings
131 | Opt_D_dump_occur_anal
135 | Opt_D_dump_simpl_iterations
136 | Opt_D_dump_simpl_phases
145 | Opt_D_dump_worker_wrapper
146 | Opt_D_dump_rn_trace
147 | Opt_D_dump_rn_stats
149 | Opt_D_dump_simpl_stats
150 | Opt_D_dump_tc_trace
151 | Opt_D_dump_if_trace
158 | Opt_D_verbose_core2core
159 | Opt_D_verbose_stg2stg
161 | Opt_D_dump_hi_diffs
162 | Opt_D_dump_minimal_imports
163 | Opt_D_dump_mod_cycles
164 | Opt_D_dump_view_pattern_commoning
165 | Opt_D_faststring_stats
166 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
167 | Opt_D_no_debug_output
173 | Opt_WarnIsError -- -Werror; makes warnings fatal
174 | Opt_WarnDuplicateExports
176 | Opt_WarnImplicitPrelude
177 | Opt_WarnIncompletePatterns
178 | Opt_WarnIncompletePatternsRecUpd
179 | Opt_WarnMissingFields
180 | Opt_WarnMissingMethods
181 | Opt_WarnMissingSigs
182 | Opt_WarnNameShadowing
183 | Opt_WarnOverlappingPatterns
184 | Opt_WarnSimplePatterns
185 | Opt_WarnTypeDefaults
186 | Opt_WarnMonomorphism
187 | Opt_WarnUnusedBinds
188 | Opt_WarnUnusedImports
189 | Opt_WarnUnusedMatches
190 | Opt_WarnWarningsDeprecations
191 | Opt_WarnDeprecatedFlags
192 | Opt_WarnDodgyImports
195 | Opt_WarnUnrecognisedPragmas
196 | Opt_WarnDodgyForeignImports
199 | Opt_OverlappingInstances
200 | Opt_UndecidableInstances
201 | Opt_IncoherentInstances
202 | Opt_MonomorphismRestriction
204 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
205 | Opt_ForeignFunctionInterface
206 | Opt_UnliftedFFITypes
207 | Opt_PArr -- Syntactic support for parallel arrays
208 | Opt_Arrows -- Arrow-notation syntax
209 | Opt_TemplateHaskell
212 | Opt_Generics -- "Derivable type classes"
213 | Opt_ImplicitPrelude
214 | Opt_ScopedTypeVariables
218 | Opt_OverloadedStrings
219 | Opt_DisambiguateRecordFields
220 | Opt_RecordWildCards
225 | Opt_StandaloneDeriving
226 | Opt_DeriveDataTypeable
228 | Opt_TypeSynonymInstances
229 | Opt_FlexibleContexts
230 | Opt_FlexibleInstances
231 | Opt_ConstrainedClassMethods
232 | Opt_MultiParamTypeClasses
233 | Opt_FunctionalDependencies
235 | Opt_PolymorphicComponents
236 | Opt_ExistentialQuantification
240 | Opt_ParallelListComp
241 | Opt_TransformListComp
242 | Opt_GeneralizedNewtypeDeriving
244 | Opt_PostfixOperators
246 | Opt_LiberalTypeSynonyms
249 | Opt_ImpredicativeTypes
252 | Opt_NewQualifiedOperators
254 | Opt_PrintExplicitForalls
259 | Opt_StaticArgumentTransformation
263 | Opt_IgnoreInterfacePragmas
264 | Opt_OmitInterfacePragmas
265 | Opt_DoLambdaEtaExpansion
269 | Opt_UnboxStrictFields
272 | Opt_InlineIfEnoughArgs
273 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
275 | Opt_RegsGraph -- do graph coloring register allocation
276 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
279 | Opt_AutoSccsOnAllToplevs
280 | Opt_AutoSccsOnExportedToplevs
281 | Opt_AutoSccsOnIndividualCafs
289 | Opt_ExcessPrecision
290 | Opt_EagerBlackHoling
291 | Opt_ReadUserPackageConf
295 | Opt_HideAllPackages
296 | Opt_PrintBindResult
300 | Opt_BreakOnException
302 | Opt_PrintEvldWithShow
303 | Opt_PrintBindContents
310 | Opt_ConvertToZipCfgAndBack
311 | Opt_AutoLinkPackages
312 | Opt_ImplicitImportQualified
321 | Opt_KeepRawTokenStream
325 -- | Contains not only a collection of 'DynFlag's but also a plethora of
326 -- information relating to the compilation of a single file or GHC session
327 data DynFlags = DynFlags {
330 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
331 stgToDo :: Maybe [StgToDo], -- similarly
332 hscTarget :: HscTarget,
333 hscOutName :: String, -- ^ Name of the output file
334 extCoreName :: String, -- ^ Name of the .hcr output file
335 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
336 optLevel :: Int, -- ^ Optimisation level
337 simplPhases :: Int, -- ^ Number of simplifier phases
338 maxSimplIterations :: Int, -- ^ Max simplifier iterations
339 shouldDumpSimplPhase :: SimplifierMode -> Bool,
340 ruleCheck :: Maybe String,
342 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
343 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
344 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
346 #ifndef OMIT_NATIVE_CODEGEN
347 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
349 stolen_x86_regs :: Int,
350 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
351 importPaths :: [FilePath],
353 mainFunIs :: Maybe String,
354 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
356 dphBackend :: DPHBackend,
358 thisPackage :: PackageId, -- ^ name of package currently being compiled
361 wayNames :: [WayName], -- ^ Way flags from the command line
362 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
363 rtsBuildTag :: String, -- ^ The RTS \"way\"
365 -- For object splitting
366 splitInfo :: Maybe (String,Int),
369 objectDir :: Maybe String,
370 hiDir :: Maybe String,
371 stubDir :: Maybe String,
377 outputFile :: Maybe String,
378 outputHi :: Maybe String,
379 dynLibLoader :: DynLibLoader,
381 -- | This is set by 'DriverPipeline.runPipeline' based on where
382 -- its output is going.
383 dumpPrefix :: Maybe FilePath,
385 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
386 -- Set by @-ddump-file-prefix@
387 dumpPrefixForce :: Maybe FilePath,
389 includePaths :: [String],
390 libraryPaths :: [String],
391 frameworkPaths :: [String], -- used on darwin only
392 cmdlineFrameworks :: [String], -- ditto
393 tmpDir :: String, -- no trailing '/'
395 ghcUsagePath :: FilePath, -- Filled in by SysTools
396 ghciUsagePath :: FilePath, -- ditto
398 hpcDir :: String, -- ^ Path to store the .mix files
400 -- options for particular phases
408 opt_windres :: [String],
410 -- commands for particular phases
412 pgm_P :: (String,[Option]),
414 pgm_c :: (String,[Option]),
415 pgm_m :: (String,[Option]),
416 pgm_s :: (String,[Option]),
417 pgm_a :: (String,[Option]),
418 pgm_l :: (String,[Option]),
419 pgm_dll :: (String,[Option]),
421 pgm_sysman :: String,
422 pgm_windres :: String,
425 depMakefile :: FilePath,
426 depIncludePkgDeps :: Bool,
427 depExcludeMods :: [ModuleName],
428 depSuffixes :: [String],
431 extraPkgConfs :: [FilePath],
432 topDir :: FilePath, -- filled in by SysTools
433 systemPackageConfig :: FilePath, -- ditto
434 -- ^ The @-package-conf@ flags given on the command line, in the order
437 packageFlags :: [PackageFlag],
438 -- ^ The @-package@ and @-hide-package@ flags from the command-line
441 -- NB. do not modify this field, it is calculated by
442 -- Packages.initPackages and Packages.updatePackages.
443 pkgDatabase :: Maybe (UniqFM PackageConfig),
444 pkgState :: PackageState,
447 -- These have to be IORefs, because the defaultCleanupHandler needs to
448 -- know what to clean when an exception happens
449 filesToClean :: IORef [FilePath],
450 dirsToClean :: IORef (FiniteMap FilePath FilePath),
455 -- | Message output action: use "ErrUtils" instead of this if you can
456 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
458 haddockOptions :: Maybe String
461 -- | The target code type of the compilation (if any).
463 -- Whenever you change the target, also make sure to set 'ghcLink' to
464 -- something sensible.
466 -- 'HscNothing' can be used to avoid generating any output, however, note
469 -- * This will not run the desugaring step, thus no warnings generated in
470 -- this step will be output. In particular, this includes warnings related
471 -- to pattern matching. You can run the desugarer manually using
472 -- 'GHC.desugarModule'.
474 -- * If a program uses Template Haskell the typechecker may try to run code
475 -- from an imported module. This will fail if no code has been generated
476 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
477 -- whether this might be the case and choose to either switch to a
478 -- different target or avoid typechecking such modules. (The latter may
479 -- preferable for security reasons.)
482 = HscC -- ^ Generate C code.
483 | HscAsm -- ^ Generate assembly using the native code generator.
484 | HscJava -- ^ Generate Java bytecode.
485 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
486 | HscNothing -- ^ Don't generate any code. See notes above.
489 -- | Will this target result in an object file on the disk?
490 isObjectTarget :: HscTarget -> Bool
491 isObjectTarget HscC = True
492 isObjectTarget HscAsm = True
493 isObjectTarget _ = False
495 -- | The 'GhcMode' tells us whether we're doing multi-module
496 -- compilation (controlled via the "GHC" API) or one-shot
497 -- (single-module) compilation. This makes a difference primarily to
498 -- the "Finder": in one-shot mode we look for interface files for
499 -- imported modules, but in multi-module mode we look for source files
500 -- in order to check whether they need to be recompiled.
502 = CompManager -- ^ @\-\-make@, GHCi, etc.
503 | OneShot -- ^ @ghc -c Foo.hs@
504 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
507 instance Outputable GhcMode where
508 ppr CompManager = ptext (sLit "CompManager")
509 ppr OneShot = ptext (sLit "OneShot")
510 ppr MkDepend = ptext (sLit "MkDepend")
512 isOneShot :: GhcMode -> Bool
513 isOneShot OneShot = True
514 isOneShot _other = False
516 -- | What to do in the link step, if there is one.
518 = NoLink -- ^ Don't link at all
519 | LinkBinary -- ^ Link object code into a binary
520 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
521 -- bytecode and object code).
522 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
525 isNoLink :: GhcLink -> Bool
526 isNoLink NoLink = True
529 -- Is it worth evaluating this Bool and caching it in the DynFlags value
530 -- during initDynFlags?
531 doingTickyProfiling :: DynFlags -> Bool
532 doingTickyProfiling dflags = WayTicky `elem` wayNames dflags
535 = ExposePackage String
537 | IgnorePackage String
540 defaultHscTarget :: HscTarget
541 defaultHscTarget = defaultObjectTarget
543 -- | The 'HscTarget' value corresponding to the default way to create
544 -- object files on the current platform.
545 defaultObjectTarget :: HscTarget
547 | cGhcWithNativeCodeGen == "YES" = HscAsm
552 | Wrapped (Maybe String)
556 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
557 initDynFlags :: DynFlags -> IO DynFlags
558 initDynFlags dflags = do
559 -- someday these will be dynamic flags
560 ways <- readIORef v_Ways
561 build_tag <- readIORef v_Build_tag
562 rts_build_tag <- readIORef v_RTS_Build_tag
563 refFilesToClean <- newIORef []
564 refDirsToClean <- newIORef emptyFM
567 buildTag = build_tag,
568 rtsBuildTag = rts_build_tag,
569 filesToClean = refFilesToClean,
570 dirsToClean = refDirsToClean
573 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
574 -- and must be fully initialized by 'GHC.newSession' first.
575 defaultDynFlags :: DynFlags
578 ghcMode = CompManager,
579 ghcLink = LinkBinary,
582 hscTarget = defaultHscTarget,
588 maxSimplIterations = 4,
589 shouldDumpSimplPhase = const False,
591 specConstrThreshold = Just 200,
592 specConstrCount = Just 3,
593 liberateCaseThreshold = Just 200,
594 #ifndef OMIT_NATIVE_CODEGEN
595 targetPlatform = defaultTargetPlatform,
598 cmdlineHcIncludes = [],
602 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
606 thisPackage = mainPackageId,
612 objectSuf = phaseInputExt StopLn,
613 hcSuf = phaseInputExt HCc,
616 outputFile = Nothing,
618 dynLibLoader = SystemDependent,
619 dumpPrefix = Nothing,
620 dumpPrefixForce = Nothing,
624 cmdlineFrameworks = [],
625 tmpDir = cDEFAULT_TMPDIR,
631 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
642 pkgDatabase = Nothing,
643 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
644 wayNames = panic "defaultDynFlags: No wayNames",
645 buildTag = panic "defaultDynFlags: No buildTag",
646 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
648 -- initSysTools fills all these in
649 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
650 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
651 topDir = panic "defaultDynFlags: No topDir",
652 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
653 pgm_L = panic "defaultDynFlags: No pgm_L",
654 pgm_P = panic "defaultDynFlags: No pgm_P",
655 pgm_F = panic "defaultDynFlags: No pgm_F",
656 pgm_c = panic "defaultDynFlags: No pgm_c",
657 pgm_m = panic "defaultDynFlags: No pgm_m",
658 pgm_s = panic "defaultDynFlags: No pgm_s",
659 pgm_a = panic "defaultDynFlags: No pgm_a",
660 pgm_l = panic "defaultDynFlags: No pgm_l",
661 pgm_dll = panic "defaultDynFlags: No pgm_dll",
662 pgm_T = panic "defaultDynFlags: No pgm_T",
663 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
664 pgm_windres = panic "defaultDynFlags: No pgm_windres",
665 -- end of initSysTools values
667 depMakefile = "Makefile",
668 depIncludePkgDeps = False,
671 -- end of ghc -M values
672 filesToClean = panic "defaultDynFlags: No filesToClean",
673 dirsToClean = panic "defaultDynFlags: No dirsToClean",
674 haddockOptions = Nothing,
676 Opt_AutoLinkPackages,
677 Opt_ReadUserPackageConf,
679 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
680 -- behaviour the default, to see if anyone notices
684 Opt_MonomorphismRestriction,
692 Opt_PrintBindContents
694 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
695 -- The default -O0 options
698 log_action = \severity srcSpan style msg ->
700 SevInfo -> printErrs (msg style)
701 SevFatal -> printErrs (msg style)
704 printErrs ((mkLocMessage srcSpan msg) style)
705 -- careful (#2302): printErrs prints in UTF-8, whereas
706 -- converting to string first and using hPutStr would
707 -- just emit the low 8 bits of each unicode char.
714 0 | print errors & warnings only
715 1 | minimal verbosity: print "compiling M ... done." for each module.
716 2 | equivalent to -dshow-passes
717 3 | equivalent to existing "ghc -v"
718 4 | "ghc -v -ddump-most"
719 5 | "ghc -v -ddump-all"
722 -- | Test whether a 'DynFlag' is set
723 dopt :: DynFlag -> DynFlags -> Bool
724 dopt f dflags = f `elem` (flags dflags)
727 dopt_set :: DynFlags -> DynFlag -> DynFlags
728 dopt_set dfs f = dfs{ flags = f : flags dfs }
730 -- | Unset a 'DynFlag'
731 dopt_unset :: DynFlags -> DynFlag -> DynFlags
732 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
734 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
735 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
736 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
737 -> [a] -- ^ Correctly ordered extracted options
738 getOpts dflags opts = reverse (opts dflags)
739 -- We add to the options from the front, so we need to reverse the list
741 -- | Gets the verbosity flag for the current verbosity level. This is fed to
742 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
743 getVerbFlag :: DynFlags -> String
745 | verbosity dflags >= 3 = "-v"
748 setObjectDir, setHiDir, setStubDir, setOutputDir,
749 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
750 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
751 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
752 addCmdlineFramework, addHaddockOpts
753 :: String -> DynFlags -> DynFlags
754 setOutputFile, setOutputHi, setDumpPrefixForce
755 :: Maybe String -> DynFlags -> DynFlags
757 setObjectDir f d = d{ objectDir = Just f}
758 setHiDir f d = d{ hiDir = Just f}
759 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
760 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
761 -- \#included from the .hc file when compiling with -fvia-C.
762 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
764 setObjectSuf f d = d{ objectSuf = f}
765 setHiSuf f d = d{ hiSuf = f}
766 setHcSuf f d = d{ hcSuf = f}
768 setOutputFile f d = d{ outputFile = f}
769 setOutputHi f d = d{ outputHi = f}
771 parseDynLibLoaderMode f d =
773 ("deploy", "") -> d{ dynLibLoader = Deployable }
774 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
775 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
776 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
777 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
778 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
780 setDumpPrefixForce f d = d { dumpPrefixForce = f}
782 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
783 -- Config.hs should really use Option.
784 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
786 setPgmL f d = d{ pgm_L = f}
787 setPgmF f d = d{ pgm_F = f}
788 setPgmc f d = d{ pgm_c = (f,[])}
789 setPgmm f d = d{ pgm_m = (f,[])}
790 setPgms f d = d{ pgm_s = (f,[])}
791 setPgma f d = d{ pgm_a = (f,[])}
792 setPgml f d = d{ pgm_l = (f,[])}
793 setPgmdll f d = d{ pgm_dll = (f,[])}
794 setPgmwindres f d = d{ pgm_windres = f}
796 addOptL f d = d{ opt_L = f : opt_L d}
797 addOptP f d = d{ opt_P = f : opt_P d}
798 addOptF f d = d{ opt_F = f : opt_F d}
799 addOptc f d = d{ opt_c = f : opt_c d}
800 addOptm f d = d{ opt_m = f : opt_m d}
801 addOpta f d = d{ opt_a = f : opt_a d}
802 addOptl f d = d{ opt_l = f : opt_l d}
803 addOptwindres f d = d{ opt_windres = f : opt_windres d}
805 setDepMakefile :: FilePath -> DynFlags -> DynFlags
806 setDepMakefile f d = d { depMakefile = deOptDep f }
808 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
809 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
811 addDepExcludeMod :: String -> DynFlags -> DynFlags
813 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
815 addDepSuffix :: FilePath -> DynFlags -> DynFlags
816 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
819 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
820 -- we need to strip the "-optdep" off of the arg
821 deOptDep :: String -> String
822 deOptDep x = case maybePrefixMatch "-optdep" x of
826 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
828 addHaddockOpts f d = d{ haddockOptions = Just f}
830 -- -----------------------------------------------------------------------------
831 -- Command-line options
833 -- | When invoking external tools as part of the compilation pipeline, we
834 -- pass these a sequence of options on the command-line. Rather than
835 -- just using a list of Strings, we use a type that allows us to distinguish
836 -- between filepaths and 'other stuff'. The reason for this is that
837 -- this type gives us a handle on transforming filenames, and filenames only,
838 -- to whatever format they're expected to be on a particular platform.
840 = FileOption -- an entry that _contains_ filename(s) / filepaths.
841 String -- a non-filepath prefix that shouldn't be
842 -- transformed (e.g., "/out=")
843 String -- the filepath/filename portion
846 -----------------------------------------------------------------------------
847 -- Setting the optimisation level
849 updOptLevel :: Int -> DynFlags -> DynFlags
850 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
852 = dfs2{ optLevel = final_n }
854 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
855 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
856 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
858 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
859 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
861 optLevelFlags :: [([Int], DynFlag)]
863 = [ ([0], Opt_IgnoreInterfacePragmas)
864 , ([0], Opt_OmitInterfacePragmas)
866 , ([1,2], Opt_IgnoreAsserts)
867 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
869 , ([1,2], Opt_DoEtaReduction)
870 , ([1,2], Opt_CaseMerge)
871 , ([1,2], Opt_Strictness)
873 , ([1,2], Opt_FullLaziness)
875 , ([2], Opt_LiberateCase)
876 , ([2], Opt_SpecConstr)
878 -- , ([2], Opt_StaticArgumentTransformation)
879 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
880 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
881 -- several improvements to the heuristics, and I'm concerned that without
882 -- those changes SAT will interfere with some attempts to write "high
883 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
884 -- this year. In particular, the version in HEAD lacks the tail call
885 -- criterion, so many things that look like reasonable loops will be
886 -- turned into functions with extra (unneccesary) thunk creation.
888 , ([0,1,2], Opt_DoLambdaEtaExpansion)
889 -- This one is important for a tiresome reason:
890 -- we want to make sure that the bindings for data
891 -- constructors are eta-expanded. This is probably
892 -- a good thing anyway, but it seems fragile.
895 -- -----------------------------------------------------------------------------
896 -- Standard sets of warning options
898 standardWarnings :: [DynFlag]
900 = [ Opt_WarnWarningsDeprecations,
901 Opt_WarnDeprecatedFlags,
902 Opt_WarnUnrecognisedPragmas,
903 Opt_WarnOverlappingPatterns,
904 Opt_WarnMissingFields,
905 Opt_WarnMissingMethods,
906 Opt_WarnDuplicateExports,
907 Opt_WarnDodgyForeignImports
910 minusWOpts :: [DynFlag]
912 = standardWarnings ++
913 [ Opt_WarnUnusedBinds,
914 Opt_WarnUnusedMatches,
915 Opt_WarnUnusedImports,
916 Opt_WarnIncompletePatterns,
920 minusWallOpts :: [DynFlag]
923 [ Opt_WarnTypeDefaults,
924 Opt_WarnNameShadowing,
930 -- minuswRemovesOpts should be every warning option
931 minuswRemovesOpts :: [DynFlag]
934 [Opt_WarnImplicitPrelude,
935 Opt_WarnIncompletePatternsRecUpd,
936 Opt_WarnSimplePatterns,
937 Opt_WarnMonomorphism,
938 Opt_WarnUnrecognisedPragmas,
942 -- -----------------------------------------------------------------------------
943 -- CoreToDo: abstraction of core-to-core passes to run.
945 data CoreToDo -- These are diff core-to-core passes,
946 -- which may be invoked in any order,
947 -- as many times as you like.
949 = CoreDoSimplify -- The core-to-core simplifier.
952 -- Each run of the simplifier can take a different
953 -- set of simplifier-specific flags.
955 | CoreDoFloatOutwards FloatOutSwitches
960 | CoreDoWorkerWrapper
963 | CoreDoOldStrictness
966 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
967 -- matching this string
968 | CoreDoVectorisation PackageId
969 | CoreDoNothing -- Useful when building up
970 | CoreDoPasses [CoreToDo] -- lists of these things
973 data SimplifierMode -- See comments in SimplMonad
975 | SimplPhase Int [String]
977 instance Outputable SimplifierMode where
978 ppr SimplGently = ptext (sLit "gentle")
979 ppr (SimplPhase n ss) = int n <+> brackets (text (concat $ intersperse "," ss))
982 data SimplifierSwitch
983 = MaxSimplifierIterations Int
987 data FloatOutSwitches = FloatOutSwitches {
988 floatOutLambdas :: Bool, -- ^ True <=> float lambdas to top level
989 floatOutConstants :: Bool -- ^ True <=> float constants to top level,
990 -- even if they do not escape a lambda
993 instance Outputable FloatOutSwitches where
994 ppr = pprFloatOutSwitches
996 pprFloatOutSwitches :: FloatOutSwitches -> SDoc
997 pprFloatOutSwitches sw = pp_not (floatOutLambdas sw) <+> text "lambdas" <> comma
998 <+> pp_not (floatOutConstants sw) <+> text "constants"
1001 pp_not False = text "not"
1003 -- | Switches that specify the minimum amount of floating out
1004 -- gentleFloatOutSwitches :: FloatOutSwitches
1005 -- gentleFloatOutSwitches = FloatOutSwitches False False
1007 -- | Switches that do not specify floating out of lambdas, just of constants
1008 constantsOnlyFloatOutSwitches :: FloatOutSwitches
1009 constantsOnlyFloatOutSwitches = FloatOutSwitches False True
1012 -- The core-to-core pass ordering is derived from the DynFlags:
1013 runWhen :: Bool -> CoreToDo -> CoreToDo
1014 runWhen True do_this = do_this
1015 runWhen False _ = CoreDoNothing
1017 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
1018 runMaybe (Just x) f = f x
1019 runMaybe Nothing _ = CoreDoNothing
1021 getCoreToDo :: DynFlags -> [CoreToDo]
1023 | Just todo <- coreToDo dflags = todo -- set explicitly by user
1024 | otherwise = core_todo
1026 opt_level = optLevel dflags
1027 phases = simplPhases dflags
1028 max_iter = maxSimplIterations dflags
1029 strictness = dopt Opt_Strictness dflags
1030 full_laziness = dopt Opt_FullLaziness dflags
1031 cse = dopt Opt_CSE dflags
1032 spec_constr = dopt Opt_SpecConstr dflags
1033 liberate_case = dopt Opt_LiberateCase dflags
1034 rule_check = ruleCheck dflags
1035 static_args = dopt Opt_StaticArgumentTransformation dflags
1037 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
1039 simpl_phase phase names iter
1041 [ CoreDoSimplify (SimplPhase phase names) [
1042 MaxSimplifierIterations iter
1044 maybe_rule_check phase
1048 = runWhen (dopt Opt_Vectorise dflags)
1049 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphPackage dflags) ]
1052 -- By default, we have 2 phases before phase 0.
1054 -- Want to run with inline phase 2 after the specialiser to give
1055 -- maximum chance for fusion to work before we inline build/augment
1056 -- in phase 1. This made a difference in 'ansi' where an
1057 -- overloaded function wasn't inlined till too late.
1059 -- Need phase 1 so that build/augment get
1060 -- inlined. I found that spectral/hartel/genfft lost some useful
1061 -- strictness in the function sumcode' if augment is not inlined
1062 -- before strictness analysis runs
1063 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
1064 | phase <- [phases, phases-1 .. 1] ]
1067 -- initial simplify: mk specialiser happy: minimum effort please
1068 simpl_gently = CoreDoSimplify SimplGently [
1069 -- Simplify "gently"
1070 -- Don't inline anything till full laziness has bitten
1071 -- In particular, inlining wrappers inhibits floating
1072 -- e.g. ...(case f x of ...)...
1073 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
1074 -- ==> ...(case x of I# x# -> case fw x# of ...)...
1075 -- and now the redex (f x) isn't floatable any more
1076 -- Similarly, don't apply any rules until after full
1077 -- laziness. Notably, list fusion can prevent floating.
1079 NoCaseOfCase, -- Don't do case-of-case transformations.
1080 -- This makes full laziness work better
1081 MaxSimplifierIterations max_iter
1085 if opt_level == 0 then
1087 simpl_phase 0 ["final"] max_iter]
1088 else {- opt_level >= 1 -} [
1090 -- We want to do the static argument transform before full laziness as it
1091 -- may expose extra opportunities to float things outwards. However, to fix
1092 -- up the output of the transformation we need at do at least one simplify
1093 -- after this before anything else
1094 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
1096 -- We run vectorisation here for now, but we might also try to run
1100 -- initial simplify: mk specialiser happy: minimum effort please
1103 -- Specialisation is best done before full laziness
1104 -- so that overloaded functions have all their dictionary lambdas manifest
1107 runWhen full_laziness (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1108 -- Was: gentleFloatOutSwitches
1109 -- I have no idea why, but not floating constants to top level is
1110 -- very bad in some cases.
1111 -- Notably: p_ident in spectral/rewrite
1112 -- Changing from "gentle" to "constantsOnly" improved
1113 -- rewrite's allocation by 19%, and made 0.0% difference
1114 -- to any other nofib benchmark
1120 -- Phase 0: allow all Ids to be inlined now
1121 -- This gets foldr inlined before strictness analysis
1123 -- At least 3 iterations because otherwise we land up with
1124 -- huge dead expressions because of an infelicity in the
1126 -- let k = BIG in foldr k z xs
1127 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1128 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1130 simpl_phase 0 ["main"] (max max_iter 3),
1133 #ifdef OLD_STRICTNESS
1134 CoreDoOldStrictness,
1136 runWhen strictness (CoreDoPasses [
1138 CoreDoWorkerWrapper,
1140 simpl_phase 0 ["post-worker-wrapper"] max_iter
1143 runWhen full_laziness
1144 (CoreDoFloatOutwards constantsOnlyFloatOutSwitches),
1145 -- nofib/spectral/hartel/wang doubles in speed if you
1146 -- do full laziness late in the day. It only happens
1147 -- after fusion and other stuff, so the early pass doesn't
1148 -- catch it. For the record, the redex is
1149 -- f_el22 (f_el21 r_midblock)
1152 runWhen cse CoreCSE,
1153 -- We want CSE to follow the final full-laziness pass, because it may
1154 -- succeed in commoning up things floated out by full laziness.
1155 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1161 -- Case-liberation for -O2. This should be after
1162 -- strictness analysis and the simplification which follows it.
1163 runWhen liberate_case (CoreDoPasses [
1165 simpl_phase 0 ["post-liberate-case"] max_iter
1166 ]), -- Run the simplifier after LiberateCase to vastly
1167 -- reduce the possiblility of shadowing
1168 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1170 runWhen spec_constr CoreDoSpecConstr,
1174 -- Final clean-up simplification:
1175 simpl_phase 0 ["final"] max_iter
1178 -- -----------------------------------------------------------------------------
1179 -- StgToDo: abstraction of stg-to-stg passes to run.
1182 = StgDoMassageForProfiling -- should be (next to) last
1183 -- There's also setStgVarInfo, but its absolute "lastness"
1184 -- is so critical that it is hardwired in (no flag).
1187 getStgToDo :: DynFlags -> [StgToDo]
1189 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1192 stg_stats = dopt Opt_StgStats dflags
1194 todo1 = if stg_stats then [D_stg_stats] else []
1196 todo2 | WayProf `elem` wayNames dflags
1197 = StgDoMassageForProfiling : todo1
1201 -- -----------------------------------------------------------------------------
1204 allFlags :: [String]
1205 allFlags = map ('-':) $
1206 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1207 map ("fno-"++) flags ++
1208 map ("f"++) flags ++
1209 map ("X"++) supportedLanguages ++
1210 map ("XNo"++) supportedLanguages
1211 where ok (PrefixPred _ _) = False
1213 flags = [ name | (name, _, _) <- fFlags ]
1215 dynamic_flags :: [Flag DynP]
1217 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1218 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1219 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1220 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1221 , Flag "v" (OptIntSuffix setVerbosity) Supported
1223 ------- Specific phases --------------------------------------------
1224 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1225 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1226 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1227 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1228 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1229 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1230 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1231 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1232 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1233 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1235 , Flag "optL" (HasArg (upd . addOptL)) Supported
1236 , Flag "optP" (HasArg (upd . addOptP)) Supported
1237 , Flag "optF" (HasArg (upd . addOptF)) Supported
1238 , Flag "optc" (HasArg (upd . addOptc)) Supported
1239 , Flag "optm" (HasArg (upd . addOptm)) Supported
1240 , Flag "opta" (HasArg (upd . addOpta)) Supported
1241 , Flag "optl" (HasArg (upd . addOptl)) Supported
1242 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1245 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1248 -------- ghc -M -----------------------------------------------------
1249 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1250 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1251 (Deprecated "Use -dep-suffix instead")
1252 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1253 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1254 (Deprecated "Use -dep-makefile instead")
1255 , Flag "optdep-w" (NoArg (return ()))
1256 (Deprecated "-optdep-w doesn't do anything")
1257 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1258 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1259 (Deprecated "Use -include-pkg-deps instead")
1260 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1261 (Deprecated "Use -include-pkg-deps instead")
1262 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1263 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1264 (Deprecated "Use -exclude-module instead")
1265 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1266 (Deprecated "Use -exclude-module instead")
1268 -------- Linking ----------------------------------------------------
1269 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1271 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1272 (Deprecated "Use -c instead")
1273 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1275 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1278 ------- Libraries ---------------------------------------------------
1279 , Flag "L" (Prefix addLibraryPath ) Supported
1280 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1282 ------- Frameworks --------------------------------------------------
1283 -- -framework-path should really be -F ...
1284 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1285 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1287 ------- Output Redirection ------------------------------------------
1288 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1289 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1290 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1291 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1292 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1293 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1294 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1295 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1296 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1297 , Flag "outputdir" (HasArg (upd . setOutputDir)) Supported
1298 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1301 ------- Keeping temporary files -------------------------------------
1302 -- These can be singular (think ghc -c) or plural (think ghc --make)
1303 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1304 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1305 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1306 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1307 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1308 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1309 -- This only makes sense as plural
1310 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1312 ------- Miscellaneous ----------------------------------------------
1313 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1314 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1315 , Flag "main-is" (SepArg setMainIs ) Supported
1316 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1317 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1318 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1320 ------- recompilation checker --------------------------------------
1321 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1322 (Deprecated "Use -fno-force-recomp instead")
1323 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1324 (Deprecated "Use -fforce-recomp instead")
1326 ------ HsCpp opts ---------------------------------------------------
1327 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1328 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1330 ------- Include/Import Paths ----------------------------------------
1331 , Flag "I" (Prefix addIncludePath) Supported
1332 , Flag "i" (OptPrefix addImportPath ) Supported
1334 ------ Debugging ----------------------------------------------------
1335 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1337 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1339 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1341 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1343 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1345 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1347 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1349 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1351 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1353 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1355 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1357 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1359 , Flag "ddump-asm-regalloc-stages"
1360 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1362 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1364 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1366 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1368 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1370 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1372 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1374 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1376 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1378 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1380 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1382 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1384 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1386 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1388 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1390 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1392 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1394 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1396 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1398 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1400 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1402 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1404 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1406 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1408 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1410 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1412 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1414 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1416 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1418 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1420 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1422 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1424 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1426 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1428 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1430 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1432 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1434 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1436 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1438 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1440 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1442 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1444 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1446 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1448 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1451 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1453 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1455 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1457 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1459 , Flag "dshow-passes"
1460 (NoArg (do forceRecompile
1461 setVerbosity (Just 2)))
1463 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1466 ------ Machine dependant (-m<blah>) stuff ---------------------------
1468 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1470 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1472 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1475 ------ Warning opts -------------------------------------------------
1476 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1478 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1480 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1482 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1484 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1485 (Deprecated "Use -w instead")
1486 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1489 ------ Optimisation flags ------------------------------------------
1490 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1491 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1492 (Deprecated "Use -O0 instead")
1493 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1494 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1496 -- If the number is missing, use 1
1498 , Flag "fsimplifier-phases"
1499 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1501 , Flag "fmax-simplifier-iterations"
1502 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1505 , Flag "fspec-constr-threshold"
1506 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1508 , Flag "fno-spec-constr-threshold"
1509 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1511 , Flag "fspec-constr-count"
1512 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1514 , Flag "fno-spec-constr-count"
1515 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1517 , Flag "fliberate-case-threshold"
1518 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1520 , Flag "fno-liberate-case-threshold"
1521 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1524 , Flag "frule-check"
1525 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1527 , Flag "fcontext-stack"
1528 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1531 ------ Profiling ----------------------------------------------------
1533 -- XXX Should the -f* flags be deprecated?
1534 -- They don't seem to be documented
1535 , Flag "fauto-sccs-on-all-toplevs"
1536 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1539 (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1541 , Flag "no-auto-all"
1542 (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1544 , Flag "fauto-sccs-on-exported-toplevs"
1545 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1548 (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1551 (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1553 , Flag "fauto-sccs-on-individual-cafs"
1554 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1557 (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1560 (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1563 ------ DPH flags ----------------------------------------------------
1566 (NoArg (setDPHBackend DPHSeq))
1569 (NoArg (setDPHBackend DPHPar))
1572 (NoArg (setDPHBackend DPHThis))
1575 ------ Compiler flags -----------------------------------------------
1577 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1578 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1579 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1581 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1582 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1583 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1585 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1587 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1590 ++ map (mkFlag True "f" setDynFlag ) fFlags
1591 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1592 ++ map (mkFlag True "X" setDynFlag ) xFlags
1593 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1595 package_flags :: [Flag DynP]
1597 ------- Packages ----------------------------------------------------
1598 Flag "package-conf" (HasArg extraPkgConf_) Supported
1599 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1601 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1602 , Flag "package" (HasArg exposePackage) Supported
1603 , Flag "hide-package" (HasArg hidePackage) Supported
1604 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1606 , Flag "ignore-package" (HasArg ignorePackage)
1608 , Flag "syslib" (HasArg exposePackage)
1609 (Deprecated "Use -package instead")
1612 mkFlag :: Bool -- ^ True <=> it should be turned on
1613 -> String -- ^ The flag prefix
1614 -> (DynFlag -> DynP ())
1615 -> (String, DynFlag, Bool -> Deprecated)
1617 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1618 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1620 deprecatedForLanguage :: String -> Bool -> Deprecated
1621 deprecatedForLanguage lang turn_on
1622 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1624 flag | turn_on = lang
1625 | otherwise = "No"++lang
1627 useInstead :: String -> Bool -> Deprecated
1628 useInstead flag turn_on
1629 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1631 no = if turn_on then "" else "no-"
1633 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1634 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1636 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1637 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1638 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1639 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1640 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1641 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1642 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1643 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1644 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1645 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1646 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1647 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1648 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1649 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1650 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1651 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1652 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1653 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1654 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1655 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1656 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1657 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1658 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1659 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1660 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1661 ( "strictness", Opt_Strictness, const Supported ),
1662 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1663 ( "full-laziness", Opt_FullLaziness, const Supported ),
1664 ( "liberate-case", Opt_LiberateCase, const Supported ),
1665 ( "spec-constr", Opt_SpecConstr, const Supported ),
1666 ( "cse", Opt_CSE, const Supported ),
1667 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1668 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1669 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1670 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1671 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1672 ( "case-merge", Opt_CaseMerge, const Supported ),
1673 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1674 ( "method-sharing", Opt_MethodSharing, const Supported ),
1675 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1676 ( "inline-if-enough-args", Opt_InlineIfEnoughArgs, const Supported ),
1677 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1678 ( "eager-blackholing", Opt_EagerBlackHoling, const Supported ),
1679 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1680 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1681 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1682 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1683 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1684 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1685 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1686 ( "break-on-error", Opt_BreakOnError, const Supported ),
1687 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1688 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1689 ( "run-cps", Opt_RunCPS, const Supported ),
1690 ( "run-cpsz", Opt_RunCPSZ, const Supported ),
1691 ( "new-codegen", Opt_TryNewCodeGen, const Supported ),
1692 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1693 ( "vectorise", Opt_Vectorise, const Supported ),
1694 ( "regs-graph", Opt_RegsGraph, const Supported ),
1695 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1696 ( "th", Opt_TemplateHaskell,
1697 deprecatedForLanguage "TemplateHaskell" ),
1698 ( "fi", Opt_ForeignFunctionInterface,
1699 deprecatedForLanguage "ForeignFunctionInterface" ),
1700 ( "ffi", Opt_ForeignFunctionInterface,
1701 deprecatedForLanguage "ForeignFunctionInterface" ),
1702 ( "arrows", Opt_Arrows,
1703 deprecatedForLanguage "Arrows" ),
1704 ( "generics", Opt_Generics,
1705 deprecatedForLanguage "Generics" ),
1706 ( "implicit-prelude", Opt_ImplicitPrelude,
1707 deprecatedForLanguage "ImplicitPrelude" ),
1708 ( "bang-patterns", Opt_BangPatterns,
1709 deprecatedForLanguage "BangPatterns" ),
1710 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1711 deprecatedForLanguage "MonomorphismRestriction" ),
1712 ( "mono-pat-binds", Opt_MonoPatBinds,
1713 deprecatedForLanguage "MonoPatBinds" ),
1714 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1715 deprecatedForLanguage "ExtendedDefaultRules" ),
1716 ( "implicit-params", Opt_ImplicitParams,
1717 deprecatedForLanguage "ImplicitParams" ),
1718 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1719 deprecatedForLanguage "ScopedTypeVariables" ),
1721 deprecatedForLanguage "PArr" ),
1722 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1723 deprecatedForLanguage "OverlappingInstances" ),
1724 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1725 deprecatedForLanguage "UndecidableInstances" ),
1726 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1727 deprecatedForLanguage "IncoherentInstances" ),
1728 ( "gen-manifest", Opt_GenManifest, const Supported ),
1729 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1730 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1733 supportedLanguages :: [String]
1734 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1736 -- This may contain duplicates
1737 languageOptions :: [DynFlag]
1738 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1740 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1741 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1743 ( "CPP", Opt_Cpp, const Supported ),
1744 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1745 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1746 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1747 ( "MagicHash", Opt_MagicHash, const Supported ),
1748 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1749 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1750 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1751 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1752 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1753 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1754 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1755 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1756 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1757 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1758 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1759 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1760 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1761 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1762 ( "Arrows", Opt_Arrows, const Supported ),
1763 ( "PArr", Opt_PArr, const Supported ),
1764 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1765 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1766 ( "Generics", Opt_Generics, const Supported ),
1768 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1769 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1770 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1771 ( "RecordPuns", Opt_RecordPuns,
1772 deprecatedForLanguage "NamedFieldPuns" ),
1773 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1774 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1775 ( "GADTs", Opt_GADTs, const Supported ),
1776 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1777 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1778 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1780 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1781 -- On by default (which is not strictly H98):
1782 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1783 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1784 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1785 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1786 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1788 ( "PatternSignatures", Opt_ScopedTypeVariables,
1789 deprecatedForLanguage "ScopedTypeVariables" ),
1791 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1792 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1793 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1794 ( "DeriveFunctor", Opt_DeriveFunctor, const Supported ),
1795 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1796 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1797 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1798 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1799 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1800 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1801 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1802 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1803 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1804 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1805 ( "PackageImports", Opt_PackageImports, const Supported ),
1806 ( "NewQualifiedOperators", Opt_NewQualifiedOperators, const Supported )
1809 impliedFlags :: [(DynFlag, DynFlag)]
1811 = [ (Opt_GADTs, Opt_RelaxedPolyRec) -- We want type-sig variables to
1812 -- be completely rigid for GADTs
1814 , (Opt_TypeFamilies, Opt_RelaxedPolyRec) -- Trac #2944 gives a nice example
1815 , (Opt_TypeFamilies, Opt_KindSignatures) -- Type families use kind signatures
1816 -- all over the place
1818 , (Opt_ScopedTypeVariables, Opt_RelaxedPolyRec) -- Ditto for scoped type variables; see
1819 -- Note [Scoped tyvars] in TcBinds
1820 , (Opt_ImpredicativeTypes, Opt_RankNTypes)
1823 glasgowExtsFlags :: [DynFlag]
1824 glasgowExtsFlags = [
1825 Opt_PrintExplicitForalls
1826 , Opt_ForeignFunctionInterface
1827 , Opt_UnliftedFFITypes
1829 , Opt_ImplicitParams
1830 , Opt_ScopedTypeVariables
1832 , Opt_TypeSynonymInstances
1833 , Opt_StandaloneDeriving
1834 , Opt_DeriveDataTypeable
1836 , Opt_FlexibleContexts
1837 , Opt_FlexibleInstances
1838 , Opt_ConstrainedClassMethods
1839 , Opt_MultiParamTypeClasses
1840 , Opt_FunctionalDependencies
1842 , Opt_PolymorphicComponents
1843 , Opt_ExistentialQuantification
1845 , Opt_PostfixOperators
1847 , Opt_LiberalTypeSynonyms
1851 , Opt_ParallelListComp
1852 , Opt_EmptyDataDecls
1853 , Opt_KindSignatures
1854 , Opt_GeneralizedNewtypeDeriving
1855 , Opt_TypeFamilies ]
1857 -- -----------------------------------------------------------------------------
1858 -- Parsing the dynamic flags.
1860 -- | Parse dynamic flags from a list of command line arguments. Returns the
1861 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1862 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1863 -- flags or missing arguments).
1864 parseDynamicFlags :: Monad m =>
1865 DynFlags -> [Located String]
1866 -> m (DynFlags, [Located String], [Located String])
1867 -- ^ Updated 'DynFlags', left-over arguments, and
1868 -- list of warnings.
1869 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1871 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1872 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1873 parseDynamicNoPackageFlags :: Monad m =>
1874 DynFlags -> [Located String]
1875 -> m (DynFlags, [Located String], [Located String])
1876 -- ^ Updated 'DynFlags', left-over arguments, and
1877 -- list of warnings.
1878 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1880 parseDynamicFlags_ :: Monad m =>
1881 DynFlags -> [Located String] -> Bool
1882 -> m (DynFlags, [Located String], [Located String])
1883 parseDynamicFlags_ dflags args pkg_flags = do
1884 -- XXX Legacy support code
1885 -- We used to accept things like
1886 -- optdep-f -optdepdepend
1887 -- optdep-f -optdep depend
1888 -- optdep -f -optdepdepend
1889 -- optdep -f -optdep depend
1890 -- but the spaces trip up proper argument handling. So get rid of them.
1891 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1892 f (x : xs) = x : f xs
1896 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1897 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1898 | otherwise = dynamic_flags
1900 let ((leftover, errs, warns), dflags')
1901 = runCmdLine (processArgs flag_spec args') dflags
1902 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1903 return (dflags', leftover, warns)
1905 type DynP = CmdLineP DynFlags
1907 upd :: (DynFlags -> DynFlags) -> DynP ()
1909 dfs <- getCmdLineState
1910 putCmdLineState $! (f dfs)
1912 --------------------------
1913 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1914 setDynFlag f = do { upd (\dfs -> dopt_set dfs f)
1915 ; mapM_ setDynFlag deps }
1917 deps = [ d | (f', d) <- impliedFlags, f' == f ]
1918 -- When you set f, set the ones it implies
1919 -- NB: use setDynFlag recursively, in case the implied flags
1920 -- implies further flags
1921 -- When you un-set f, however, we don't un-set the things it implies
1922 -- (except for -fno-glasgow-exts, which is treated specially)
1924 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1926 --------------------------
1927 setDumpFlag :: DynFlag -> OptKind DynP
1928 setDumpFlag dump_flag
1929 = NoArg (setDynFlag dump_flag >> when want_recomp forceRecompile)
1931 -- Certain dumpy-things are really interested in what's going
1932 -- on during recompilation checking, so in those cases we
1933 -- don't want to turn it off.
1934 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1935 Opt_D_dump_hi_diffs]
1937 forceRecompile :: DynP ()
1938 -- Whenver we -ddump, force recompilation (by switching off the
1939 -- recompilation checker), else you don't see the dump! However,
1940 -- don't switch it off in --make mode, else *everything* gets
1941 -- recompiled which probably isn't what you want
1942 forceRecompile = do { dfs <- getCmdLineState
1943 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1945 force_recomp dfs = isOneShot (ghcMode dfs)
1947 setVerboseCore2Core :: DynP ()
1948 setVerboseCore2Core = do setDynFlag Opt_D_verbose_core2core
1950 upd (\s -> s { shouldDumpSimplPhase = const True })
1952 setDumpSimplPhases :: String -> DynP ()
1953 setDumpSimplPhases s = do forceRecompile
1954 upd (\s -> s { shouldDumpSimplPhase = spec })
1956 spec :: SimplifierMode -> Bool
1958 . map (join (&&) . map match . split ':')
1964 join :: (Bool -> Bool -> Bool)
1965 -> [SimplifierMode -> Bool]
1966 -> SimplifierMode -> Bool
1967 join _ [] = const True
1968 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1970 match :: String -> SimplifierMode -> Bool
1971 match "" = const True
1972 match s = case reads s of
1973 [(n,"")] -> phase_num n
1976 phase_num :: Int -> SimplifierMode -> Bool
1977 phase_num n (SimplPhase k _) = n == k
1978 phase_num _ _ = False
1980 phase_name :: String -> SimplifierMode -> Bool
1981 phase_name s SimplGently = s == "gentle"
1982 phase_name s (SimplPhase _ ss) = s `elem` ss
1984 setVerbosity :: Maybe Int -> DynP ()
1985 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1987 addCmdlineHCInclude :: String -> DynP ()
1988 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1990 extraPkgConf_ :: FilePath -> DynP ()
1991 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1993 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1995 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1997 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1999 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
2001 setPackageName :: String -> DynFlags -> DynFlags
2003 | Nothing <- unpackPackageId pid
2004 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
2006 = \s -> s{ thisPackage = pid }
2008 pid = stringToPackageId p
2010 -- If we're linking a binary, then only targets that produce object
2011 -- code are allowed (requests for other target types are ignored).
2012 setTarget :: HscTarget -> DynP ()
2013 setTarget l = upd set
2016 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
2019 -- Changes the target only if we're compiling object code. This is
2020 -- used by -fasm and -fvia-C, which switch from one to the other, but
2021 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
2022 -- can be safely used in an OPTIONS_GHC pragma.
2023 setObjTarget :: HscTarget -> DynP ()
2024 setObjTarget l = upd set
2027 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
2030 setOptLevel :: Int -> DynFlags -> DynFlags
2031 setOptLevel n dflags
2032 | hscTarget dflags == HscInterpreted && n > 0
2034 -- not in IO any more, oh well:
2035 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
2037 = updOptLevel n dflags
2040 -- -Odph is equivalent to
2042 -- -O2 optimise as much as possible
2043 -- -fno-method-sharing sharing specialisation defeats fusion
2045 -- -fdicts-cheap always inline dictionaries
2046 -- -fmax-simplifier-iterations20 this is necessary sometimes
2047 -- -fsimplifier-phases=3 we use an additional simplifier phase
2049 -- -fno-spec-constr-threshold run SpecConstr even for big loops
2050 -- -fno-spec-constr-count SpecConstr as much as possible
2051 -- -finline-enough-args hack to prevent excessive inlining
2053 setDPHOpt :: DynFlags -> DynFlags
2054 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
2056 , specConstrThreshold = Nothing
2057 , specConstrCount = Nothing
2059 `dopt_set` Opt_DictsCheap
2060 `dopt_unset` Opt_MethodSharing
2061 `dopt_set` Opt_InlineIfEnoughArgs
2063 data DPHBackend = DPHPar
2066 deriving(Eq, Ord, Enum, Show)
2068 setDPHBackend :: DPHBackend -> DynP ()
2069 setDPHBackend backend
2071 upd $ \dflags -> dflags { dphBackend = backend }
2072 mapM_ exposePackage (dph_packages backend)
2074 dph_packages DPHThis = []
2075 dph_packages DPHPar = ["dph-prim-par", "dph-par"]
2076 dph_packages DPHSeq = ["dph-prim-seq", "dph-seq"]
2078 dphPackage :: DynFlags -> PackageId
2079 dphPackage dflags = case dphBackend dflags of
2080 DPHPar -> dphParPackageId
2081 DPHSeq -> dphSeqPackageId
2082 DPHThis -> thisPackage dflags
2084 setMainIs :: String -> DynP ()
2086 | not (null main_fn) && isLower (head main_fn)
2087 -- The arg looked like "Foo.Bar.baz"
2088 = upd $ \d -> d{ mainFunIs = Just main_fn,
2089 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2091 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2092 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2094 | otherwise -- The arg looked like "baz"
2095 = upd $ \d -> d{ mainFunIs = Just arg }
2097 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2099 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
2100 -- Either returns the default name or the one configured on the command line with -main-is
2101 getMainFun :: DynFlags -> RdrName
2102 getMainFun dflags = case (mainFunIs dflags) of
2103 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
2104 Nothing -> main_RDR_Unqual
2106 -----------------------------------------------------------------------------
2107 -- Paths & Libraries
2109 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2111 -- -i on its own deletes the import paths
2112 addImportPath "" = upd (\s -> s{importPaths = []})
2113 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2117 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2120 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2122 addFrameworkPath p =
2123 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2125 #ifndef mingw32_TARGET_OS
2126 split_marker :: Char
2127 split_marker = ':' -- not configurable (ToDo)
2130 splitPathList :: String -> [String]
2131 splitPathList s = filter notNull (splitUp s)
2132 -- empty paths are ignored: there might be a trailing
2133 -- ':' in the initial list, for example. Empty paths can
2134 -- cause confusion when they are translated into -I options
2135 -- for passing to gcc.
2137 #ifndef mingw32_TARGET_OS
2138 splitUp xs = split split_marker xs
2140 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2142 -- That is, if "foo:bar:baz" is used, this interpreted as
2143 -- consisting of three entries, 'foo', 'bar', 'baz'.
2144 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2145 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2147 -- Notice that no attempt is made to fully replace the 'standard'
2148 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2149 -- that this will cause too much breakage for users & ':' will
2150 -- work fine even with DOS paths, if you're not insisting on being silly.
2153 splitUp (x:':':div:xs) | div `elem` dir_markers
2154 = ((x:':':div:p): splitUp rs)
2156 (p,rs) = findNextPath xs
2157 -- we used to check for existence of the path here, but that
2158 -- required the IO monad to be threaded through the command-line
2159 -- parser which is quite inconvenient. The
2160 splitUp xs = cons p (splitUp rs)
2162 (p,rs) = findNextPath xs
2167 -- will be called either when we've consumed nought or the
2168 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2169 -- finding the next split marker.
2171 case break (`elem` split_markers) xs of
2172 (p, _:ds) -> (p, ds)
2175 split_markers :: [Char]
2176 split_markers = [':', ';']
2178 dir_markers :: [Char]
2179 dir_markers = ['/', '\\']
2182 -- -----------------------------------------------------------------------------
2183 -- tmpDir, where we store temporary files.
2185 setTmpDir :: FilePath -> DynFlags -> DynFlags
2186 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2187 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2188 -- seem necessary now --SDM 7/2/2008
2190 -----------------------------------------------------------------------------
2193 setOptHpcDir :: String -> DynP ()
2194 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2196 -----------------------------------------------------------------------------
2197 -- Via-C compilation stuff
2199 -- There are some options that we need to pass to gcc when compiling
2200 -- Haskell code via C, but are only supported by recent versions of
2201 -- gcc. The configure script decides which of these options we need,
2202 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2203 -- read before each via-C compilation. The advantage of having these
2204 -- in a separate file is that the file can be created at install-time
2205 -- depending on the available gcc version, and even re-generated later
2206 -- if gcc is upgraded.
2208 -- The options below are not dependent on the version of gcc, only the
2211 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2212 [String]) -- for registerised HC compilations
2213 machdepCCOpts _dflags
2214 #if alpha_TARGET_ARCH
2216 #ifdef HAVE_THREADED_RTS_SUPPORT
2220 -- For now, to suppress the gcc warning "call-clobbered
2221 -- register used for global register variable", we simply
2222 -- disable all warnings altogether using the -w flag. Oh well.
2224 #elif hppa_TARGET_ARCH
2225 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2226 -- (very nice, but too bad the HP /usr/include files don't agree.)
2227 = ( ["-D_HPUX_SOURCE"], [] )
2229 #elif m68k_TARGET_ARCH
2230 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2231 -- popping of args to routines to be explicit; if we let things
2232 -- be deferred 'til after an STGJUMP, imminent death is certain!
2234 -- -fomit-frame-pointer : *don't*
2235 -- It's better to have a6 completely tied up being a frame pointer
2236 -- rather than let GCC pick random things to do with it.
2237 -- (If we want to steal a6, then we would try to do things
2238 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2239 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2241 #elif i386_TARGET_ARCH
2242 -- -fno-defer-pop : basically the same game as for m68k
2244 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2245 -- the fp (%ebp) for our register maps.
2246 = let n_regs = stolen_x86_regs _dflags
2249 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2252 "-fomit-frame-pointer",
2253 -- we want -fno-builtin, because when gcc inlines
2254 -- built-in functions like memcpy() it tends to
2255 -- run out of registers, requiring -monly-n-regs
2257 "-DSTOLEN_X86_REGS="++show n_regs ]
2260 #elif ia64_TARGET_ARCH
2261 = ( [], ["-fomit-frame-pointer", "-G0"] )
2263 #elif x86_64_TARGET_ARCH
2265 #if darwin_TARGET_OS
2270 ["-fomit-frame-pointer",
2271 "-fno-asynchronous-unwind-tables",
2272 -- the unwind tables are unnecessary for HC code,
2273 -- and get in the way of -split-objs. Another option
2274 -- would be to throw them away in the mangler, but this
2277 -- calling builtins like strlen() using the FFI can
2278 -- cause gcc to run out of regs, so use the external
2282 #elif sparc_TARGET_ARCH
2284 -- For now, to suppress the gcc warning "call-clobbered
2285 -- register used for global register variable", we simply
2286 -- disable all warnings altogether using the -w flag. Oh well.
2288 #elif powerpc_apple_darwin_TARGET
2290 -- Disable Apple's precompiling preprocessor. It's a great thing
2291 -- for "normal" programs, but it doesn't support register variable
2293 = ( [], ["-no-cpp-precomp"] )
2298 picCCOpts :: DynFlags -> [String]
2300 #if darwin_TARGET_OS
2301 -- Apple prefers to do things the other way round.
2302 -- PIC is on by default.
2303 -- -mdynamic-no-pic:
2304 -- Turn off PIC code generation.
2306 -- Don't generate "common" symbols - these are unwanted
2307 -- in dynamic libraries.
2310 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2312 = ["-mdynamic-no-pic"]
2313 #elif mingw32_TARGET_OS
2314 -- no -fPIC for Windows
2316 = ["-U __PIC__","-D__PIC__"]
2320 | opt_PIC || not opt_Static
2321 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2326 -- -----------------------------------------------------------------------------
2330 can_split = cSplitObjs == "YES"
2332 -- -----------------------------------------------------------------------------
2335 compilerInfo :: [(String, String)]
2336 compilerInfo = [("Project name", cProjectName),
2337 ("Project version", cProjectVersion),
2338 ("Booter version", cBooterVersion),
2340 ("Interface file version", cHscIfaceFileVersion),
2341 ("Have interpreter", cGhcWithInterpreter),
2342 ("Object splitting", cSplitObjs),
2343 ("Have native code generator", cGhcWithNativeCodeGen),
2344 ("Support SMP", cGhcWithSMP),
2345 ("Unregisterised", cGhcUnregisterised),
2346 ("Tables next to code", cGhcEnableTablesNextToCode),
2347 ("Win32 DLLs", cEnableWin32DLLs),
2348 ("RTS ways", cGhcRTSWays),
2349 ("Leading underscore", cLeadingUnderscore),
2350 ("Debug on", show debugIsOn)