2 -----------------------------------------------------------------------------
7 -- (c) The University of Glasgow 2005
9 -----------------------------------------------------------------------------
11 -- | Most flags are dynamic flags, which means they can change from
12 -- compilation to compilation using @OPTIONS_GHC@ pragmas, and in a
13 -- multi-session GHC each session can be using different dynamic
14 -- flags. Dynamic flags can also be set at the prompt in GHCi.
16 -- * Dynamic flags and associated configuration types
19 HscTarget(..), isObjectTarget, defaultObjectTarget,
20 GhcMode(..), isOneShot,
21 GhcLink(..), isNoLink,
28 -- ** Manipulating DynFlags
29 defaultDynFlags, -- DynFlags
30 initDynFlags, -- DynFlags -> IO DynFlags
32 dopt, -- DynFlag -> DynFlags -> Bool
33 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
34 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
41 -- ** Parsing DynFlags
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"
69 import PrelNames ( mAIN, main_RDR_Unqual )
70 import RdrName ( RdrName, mkRdrUnqual )
71 import OccName ( mkVarOccFS )
72 #ifdef i386_TARGET_ARCH
73 import StaticFlags ( opt_Static )
75 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
77 import {-# SOURCE #-} Packages (PackageState)
78 import DriverPhases ( Phase(..), phaseInputExt )
81 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
83 import UniqFM ( UniqFM )
85 import Maybes ( orElse )
86 import SrcLoc ( SrcSpan )
89 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
91 import Data.IORef ( readIORef )
92 import Control.Monad ( when )
95 import System.FilePath
96 import System.IO ( stderr, hPutChar )
98 -- -----------------------------------------------------------------------------
101 -- | Enumerates the simple on-or-off dynamic flags
107 | Opt_D_dump_cmmz_pretty
111 | Opt_D_dump_asm_native
112 | Opt_D_dump_asm_liveness
113 | Opt_D_dump_asm_coalesce
114 | Opt_D_dump_asm_regalloc
115 | Opt_D_dump_asm_regalloc_stages
116 | Opt_D_dump_asm_conflicts
117 | Opt_D_dump_asm_stats
123 | Opt_D_dump_inlinings
124 | Opt_D_dump_rule_firings
125 | Opt_D_dump_occur_anal
129 | Opt_D_dump_simpl_iterations
130 | Opt_D_dump_simpl_phases
139 | Opt_D_dump_worker_wrapper
140 | Opt_D_dump_rn_trace
141 | Opt_D_dump_rn_stats
143 | Opt_D_dump_simpl_stats
144 | Opt_D_dump_tc_trace
145 | Opt_D_dump_if_trace
151 | Opt_D_verbose_core2core
152 | Opt_D_verbose_stg2stg
154 | Opt_D_dump_hi_diffs
155 | Opt_D_dump_minimal_imports
156 | Opt_D_dump_mod_cycles
157 | Opt_D_dump_view_pattern_commoning
158 | Opt_D_faststring_stats
159 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
160 | Opt_D_no_debug_output
166 | Opt_WarnIsError -- -Werror; makes warnings fatal
167 | Opt_WarnDuplicateExports
169 | Opt_WarnImplicitPrelude
170 | Opt_WarnIncompletePatterns
171 | Opt_WarnIncompletePatternsRecUpd
172 | Opt_WarnMissingFields
173 | Opt_WarnMissingMethods
174 | Opt_WarnMissingSigs
175 | Opt_WarnNameShadowing
176 | Opt_WarnOverlappingPatterns
177 | Opt_WarnSimplePatterns
178 | Opt_WarnTypeDefaults
179 | Opt_WarnMonomorphism
180 | Opt_WarnUnusedBinds
181 | Opt_WarnUnusedImports
182 | Opt_WarnUnusedMatches
183 | Opt_WarnWarningsDeprecations
184 | Opt_WarnDeprecatedFlags
185 | Opt_WarnDodgyImports
188 | Opt_WarnUnrecognisedPragmas
189 | Opt_WarnDodgyForeignImports
192 | Opt_OverlappingInstances
193 | Opt_UndecidableInstances
194 | Opt_IncoherentInstances
195 | Opt_MonomorphismRestriction
197 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
198 | Opt_ForeignFunctionInterface
199 | Opt_UnliftedFFITypes
200 | Opt_PArr -- Syntactic support for parallel arrays
201 | Opt_Arrows -- Arrow-notation syntax
202 | Opt_TemplateHaskell
206 | Opt_ImplicitPrelude
207 | Opt_ScopedTypeVariables
211 | Opt_OverloadedStrings
212 | Opt_DisambiguateRecordFields
213 | Opt_RecordWildCards
218 | Opt_StandaloneDeriving
219 | Opt_DeriveDataTypeable
220 | Opt_TypeSynonymInstances
221 | Opt_FlexibleContexts
222 | Opt_FlexibleInstances
223 | Opt_ConstrainedClassMethods
224 | Opt_MultiParamTypeClasses
225 | Opt_FunctionalDependencies
227 | Opt_PolymorphicComponents
228 | Opt_ExistentialQuantification
232 | Opt_PatternSignatures
233 | Opt_ParallelListComp
234 | Opt_TransformListComp
235 | Opt_GeneralizedNewtypeDeriving
237 | Opt_PostfixOperators
239 | Opt_LiberalTypeSynonyms
242 | Opt_ImpredicativeTypes
246 | Opt_PrintExplicitForalls
251 | Opt_StaticArgumentTransformation
255 | Opt_IgnoreInterfacePragmas
256 | Opt_OmitInterfacePragmas
257 | Opt_DoLambdaEtaExpansion
261 | Opt_UnboxStrictFields
266 | Opt_RegsGraph -- do graph coloring register allocation
267 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
275 | Opt_ExcessPrecision
276 | Opt_ReadUserPackageConf
280 | Opt_HideAllPackages
281 | Opt_PrintBindResult
285 | Opt_BreakOnException
287 | Opt_PrintEvldWithShow
288 | Opt_PrintBindContents
292 | Opt_ConvertToZipCfgAndBack
293 | Opt_AutoLinkPackages
294 | Opt_ImplicitImportQualified
305 -- | Contains not only a collection of 'DynFlag's but also a plethora of
306 -- information relating to the compilation of a single file or GHC session
307 data DynFlags = DynFlags {
310 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
311 stgToDo :: Maybe [StgToDo], -- similarly
312 hscTarget :: HscTarget,
313 hscOutName :: String, -- ^ Name of the output file
314 extCoreName :: String, -- ^ Name of the .core output file
315 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
316 optLevel :: Int, -- ^ Optimisation level
317 simplPhases :: Int, -- ^ Number of simplifier phases
318 maxSimplIterations :: Int, -- ^ Max simplifier iterations
319 shouldDumpSimplPhase :: SimplifierMode -> Bool,
320 ruleCheck :: Maybe String,
322 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
323 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
324 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
326 stolen_x86_regs :: Int,
327 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
328 importPaths :: [FilePath],
330 mainFunIs :: Maybe String,
331 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
333 dphBackend :: DPHBackend,
335 thisPackage :: PackageId,
338 wayNames :: [WayName], -- ^ Way flags from the command line
339 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
340 rtsBuildTag :: String, -- ^ The RTS \"way\"
343 objectDir :: Maybe String,
344 hiDir :: Maybe String,
345 stubDir :: Maybe String,
351 outputFile :: Maybe String,
352 outputHi :: Maybe String,
353 dynLibLoader :: DynLibLoader,
355 -- | This is set by 'DriverPipeline.runPipeline' based on where
356 -- its output is going.
357 dumpPrefix :: Maybe FilePath,
359 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
360 -- Set by @-ddump-file-prefix@
361 dumpPrefixForce :: Maybe FilePath,
363 includePaths :: [String],
364 libraryPaths :: [String],
365 frameworkPaths :: [String], -- used on darwin only
366 cmdlineFrameworks :: [String], -- ditto
367 tmpDir :: String, -- no trailing '/'
369 ghcUsagePath :: FilePath, -- Filled in by SysTools
370 ghciUsagePath :: FilePath, -- ditto
372 hpcDir :: String, -- ^ Path to store the .mix files
374 -- options for particular phases
382 opt_windres :: [String],
384 -- commands for particular phases
386 pgm_P :: (String,[Option]),
388 pgm_c :: (String,[Option]),
389 pgm_m :: (String,[Option]),
390 pgm_s :: (String,[Option]),
391 pgm_a :: (String,[Option]),
392 pgm_l :: (String,[Option]),
393 pgm_dll :: (String,[Option]),
395 pgm_sysman :: String,
396 pgm_windres :: String,
399 depMakefile :: FilePath,
400 depIncludePkgDeps :: Bool,
401 depExcludeMods :: [ModuleName],
402 depSuffixes :: [String],
406 extraPkgConfs :: [FilePath],
407 topDir :: FilePath, -- filled in by SysTools
408 systemPackageConfig :: FilePath, -- ditto
409 -- ^ The @-package-conf@ flags given on the command line, in the order
412 packageFlags :: [PackageFlag],
413 -- ^ The @-package@ and @-hide-package@ flags from the command-line
416 -- NB. do not modify this field, it is calculated by
417 -- Packages.initPackages and Packages.updatePackages.
418 pkgDatabase :: Maybe (UniqFM PackageConfig),
419 pkgState :: PackageState,
424 -- | Message output action: use "ErrUtils" instead of this if you can
425 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
427 haddockOptions :: Maybe String
438 -- | Will this target result in an object file on the disk?
439 isObjectTarget :: HscTarget -> Bool
440 isObjectTarget HscC = True
441 isObjectTarget HscAsm = True
442 isObjectTarget _ = False
444 -- | The 'GhcMode' tells us whether we're doing multi-module
445 -- compilation (controlled via the "GHC" API) or one-shot
446 -- (single-module) compilation. This makes a difference primarily to
447 -- the "Finder": in one-shot mode we look for interface files for
448 -- imported modules, but in multi-module mode we look for source files
449 -- in order to check whether they need to be recompiled.
451 = CompManager -- ^ @\-\-make@, GHCi, etc.
452 | OneShot -- ^ @ghc -c Foo.hs@
453 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
456 isOneShot :: GhcMode -> Bool
457 isOneShot OneShot = True
458 isOneShot _other = False
460 -- | What to do in the link step, if there is one.
462 = NoLink -- ^ Don't link at all
463 | LinkBinary -- ^ Link object code into a binary
464 | LinkInMemory -- ^ Use the in-memory dynamic linker
465 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
468 isNoLink :: GhcLink -> Bool
469 isNoLink NoLink = True
473 = ExposePackage String
475 | IgnorePackage String
478 defaultHscTarget :: HscTarget
479 defaultHscTarget = defaultObjectTarget
481 -- | The 'HscTarget' value corresponding to the default way to create
482 -- object files on the current platform.
483 defaultObjectTarget :: HscTarget
485 | cGhcWithNativeCodeGen == "YES" = HscAsm
490 | Wrapped (Maybe String)
494 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
495 initDynFlags :: DynFlags -> IO DynFlags
496 initDynFlags dflags = do
497 -- someday these will be dynamic flags
498 ways <- readIORef v_Ways
499 build_tag <- readIORef v_Build_tag
500 rts_build_tag <- readIORef v_RTS_Build_tag
503 buildTag = build_tag,
504 rtsBuildTag = rts_build_tag
507 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
508 -- and must be fully initialized by 'GHC.newSession' first.
509 defaultDynFlags :: DynFlags
512 ghcMode = CompManager,
513 ghcLink = LinkBinary,
516 hscTarget = defaultHscTarget,
522 maxSimplIterations = 4,
523 shouldDumpSimplPhase = const False,
525 specConstrThreshold = Just 200,
526 specConstrCount = Just 3,
527 liberateCaseThreshold = Just 200,
529 cmdlineHcIncludes = [],
533 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
537 thisPackage = mainPackageId,
543 objectSuf = phaseInputExt StopLn,
544 hcSuf = phaseInputExt HCc,
547 outputFile = Nothing,
549 dynLibLoader = Deployable,
550 dumpPrefix = Nothing,
551 dumpPrefixForce = Nothing,
555 cmdlineFrameworks = [],
556 tmpDir = cDEFAULT_TMPDIR,
573 pkgDatabase = Nothing,
574 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
575 wayNames = panic "defaultDynFlags: No wayNames",
576 buildTag = panic "defaultDynFlags: No buildTag",
577 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
578 -- initSysTools fills all these in
579 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
580 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
581 topDir = panic "defaultDynFlags: No topDir",
582 systemPackageConfig = panic "defaultDynFlags: No systemPackageConfig",
583 pgm_L = panic "defaultDynFlags: No pgm_L",
584 pgm_P = panic "defaultDynFlags: No pgm_P",
585 pgm_F = panic "defaultDynFlags: No pgm_F",
586 pgm_c = panic "defaultDynFlags: No pgm_c",
587 pgm_m = panic "defaultDynFlags: No pgm_m",
588 pgm_s = panic "defaultDynFlags: No pgm_s",
589 pgm_a = panic "defaultDynFlags: No pgm_a",
590 pgm_l = panic "defaultDynFlags: No pgm_l",
591 pgm_dll = panic "defaultDynFlags: No pgm_dll",
592 pgm_T = panic "defaultDynFlags: No pgm_T",
593 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
594 pgm_windres = panic "defaultDynFlags: No pgm_windres",
595 -- end of initSysTools values
597 depMakefile = "Makefile",
598 depIncludePkgDeps = False,
602 -- end of ghc -M values
603 haddockOptions = Nothing,
605 Opt_AutoLinkPackages,
606 Opt_ReadUserPackageConf,
608 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
609 -- behaviour the default, to see if anyone notices
613 Opt_MonomorphismRestriction,
621 Opt_PrintBindContents
623 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
624 -- The default -O0 options
627 log_action = \severity srcSpan style msg ->
629 SevInfo -> printErrs (msg style)
630 SevFatal -> printErrs (msg style)
633 printErrs ((mkLocMessage srcSpan msg) style)
634 -- careful (#2302): printErrs prints in UTF-8, whereas
635 -- converting to string first and using hPutStr would
636 -- just emit the low 8 bits of each unicode char.
643 0 | print errors & warnings only
644 1 | minimal verbosity: print "compiling M ... done." for each module.
645 2 | equivalent to -dshow-passes
646 3 | equivalent to existing "ghc -v"
647 4 | "ghc -v -ddump-most"
648 5 | "ghc -v -ddump-all"
651 -- | Test whether a 'DynFlag' is set
652 dopt :: DynFlag -> DynFlags -> Bool
653 dopt f dflags = f `elem` (flags dflags)
656 dopt_set :: DynFlags -> DynFlag -> DynFlags
657 dopt_set dfs f = dfs{ flags = f : flags dfs }
659 -- | Unset a 'DynFlag'
660 dopt_unset :: DynFlags -> DynFlag -> DynFlags
661 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
663 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
664 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
665 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
666 -> [a] -- ^ Correctly ordered extracted options
667 getOpts dflags opts = reverse (opts dflags)
668 -- We add to the options from the front, so we need to reverse the list
670 -- | Gets the verbosity flag for the current verbosity level. This is fed to
671 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
672 getVerbFlag :: DynFlags -> String
674 | verbosity dflags >= 3 = "-v"
677 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
678 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
679 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
680 addCmdlineFramework, addHaddockOpts
681 :: String -> DynFlags -> DynFlags
682 setOutputFile, setOutputHi, setDumpPrefixForce
683 :: Maybe String -> DynFlags -> DynFlags
685 setObjectDir f d = d{ objectDir = Just f}
686 setHiDir f d = d{ hiDir = Just f}
687 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
688 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
689 -- \#included from the .hc file when compiling with -fvia-C.
691 setObjectSuf f d = d{ objectSuf = f}
692 setHiSuf f d = d{ hiSuf = f}
693 setHcSuf f d = d{ hcSuf = f}
695 setOutputFile f d = d{ outputFile = f}
696 setOutputHi f d = d{ outputHi = f}
698 parseDynLibLoaderMode f d =
700 ("deploy", "") -> d{ dynLibLoader = Deployable }
701 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
702 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
703 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
704 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
705 (_,_) -> error "Unknown dynlib loader"
707 setDumpPrefixForce f d = d { dumpPrefixForce = f}
709 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
710 -- Config.hs should really use Option.
711 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
713 setPgmL f d = d{ pgm_L = f}
714 setPgmF f d = d{ pgm_F = f}
715 setPgmc f d = d{ pgm_c = (f,[])}
716 setPgmm f d = d{ pgm_m = (f,[])}
717 setPgms f d = d{ pgm_s = (f,[])}
718 setPgma f d = d{ pgm_a = (f,[])}
719 setPgml f d = d{ pgm_l = (f,[])}
720 setPgmdll f d = d{ pgm_dll = (f,[])}
721 setPgmwindres f d = d{ pgm_windres = f}
723 addOptL f d = d{ opt_L = f : opt_L d}
724 addOptP f d = d{ opt_P = f : opt_P d}
725 addOptF f d = d{ opt_F = f : opt_F d}
726 addOptc f d = d{ opt_c = f : opt_c d}
727 addOptm f d = d{ opt_m = f : opt_m d}
728 addOpta f d = d{ opt_a = f : opt_a d}
729 addOptl f d = d{ opt_l = f : opt_l d}
730 addOptwindres f d = d{ opt_windres = f : opt_windres d}
732 setDepMakefile :: FilePath -> DynFlags -> DynFlags
733 setDepMakefile f d = d { depMakefile = deOptDep f }
735 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
736 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
738 addDepExcludeMod :: String -> DynFlags -> DynFlags
740 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
742 addDepSuffix :: FilePath -> DynFlags -> DynFlags
743 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
745 setDepWarnings :: Bool -> DynFlags -> DynFlags
746 setDepWarnings b d = d { depWarnings = b }
749 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
750 -- we need to strip the "-optdep" off of the arg
751 deOptDep :: String -> String
752 deOptDep x = case maybePrefixMatch "-optdep" x of
756 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
758 addHaddockOpts f d = d{ haddockOptions = Just f}
760 -- -----------------------------------------------------------------------------
761 -- Command-line options
763 -- | When invoking external tools as part of the compilation pipeline, we
764 -- pass these a sequence of options on the command-line. Rather than
765 -- just using a list of Strings, we use a type that allows us to distinguish
766 -- between filepaths and 'other stuff'. The reason for this is that
767 -- this type gives us a handle on transforming filenames, and filenames only,
768 -- to whatever format they're expected to be on a particular platform.
770 = FileOption -- an entry that _contains_ filename(s) / filepaths.
771 String -- a non-filepath prefix that shouldn't be
772 -- transformed (e.g., "/out=")
773 String -- the filepath/filename portion
776 -----------------------------------------------------------------------------
777 -- Setting the optimisation level
779 updOptLevel :: Int -> DynFlags -> DynFlags
780 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
782 = dfs2{ optLevel = final_n }
784 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
785 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
786 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
788 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
789 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
791 optLevelFlags :: [([Int], DynFlag)]
793 = [ ([0], Opt_IgnoreInterfacePragmas)
794 , ([0], Opt_OmitInterfacePragmas)
796 , ([1,2], Opt_IgnoreAsserts)
797 , ([1,2], Opt_RewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
799 , ([1,2], Opt_DoEtaReduction)
800 , ([1,2], Opt_CaseMerge)
801 , ([1,2], Opt_Strictness)
803 , ([1,2], Opt_FullLaziness)
805 , ([2], Opt_LiberateCase)
806 , ([2], Opt_SpecConstr)
807 , ([2], Opt_StaticArgumentTransformation)
809 , ([0,1,2], Opt_DoLambdaEtaExpansion)
810 -- This one is important for a tiresome reason:
811 -- we want to make sure that the bindings for data
812 -- constructors are eta-expanded. This is probably
813 -- a good thing anyway, but it seems fragile.
816 -- -----------------------------------------------------------------------------
817 -- Standard sets of warning options
819 standardWarnings :: [DynFlag]
821 = [ Opt_WarnWarningsDeprecations,
822 Opt_WarnDeprecatedFlags,
823 Opt_WarnUnrecognisedPragmas,
824 Opt_WarnOverlappingPatterns,
825 Opt_WarnMissingFields,
826 Opt_WarnMissingMethods,
827 Opt_WarnDuplicateExports,
828 Opt_WarnDodgyForeignImports
831 minusWOpts :: [DynFlag]
833 = standardWarnings ++
834 [ Opt_WarnUnusedBinds,
835 Opt_WarnUnusedMatches,
836 Opt_WarnUnusedImports,
837 Opt_WarnIncompletePatterns,
841 minusWallOpts :: [DynFlag]
844 [ Opt_WarnTypeDefaults,
845 Opt_WarnNameShadowing,
851 -- minuswRemovesOpts should be every warning option
852 minuswRemovesOpts :: [DynFlag]
855 [Opt_WarnImplicitPrelude,
856 Opt_WarnIncompletePatternsRecUpd,
857 Opt_WarnSimplePatterns,
858 Opt_WarnMonomorphism,
859 Opt_WarnUnrecognisedPragmas,
863 -- -----------------------------------------------------------------------------
864 -- CoreToDo: abstraction of core-to-core passes to run.
866 data CoreToDo -- These are diff core-to-core passes,
867 -- which may be invoked in any order,
868 -- as many times as you like.
870 = CoreDoSimplify -- The core-to-core simplifier.
873 -- Each run of the simplifier can take a different
874 -- set of simplifier-specific flags.
876 | CoreDoFloatOutwards FloatOutSwitches
881 | CoreDoWorkerWrapper
884 | CoreDoOldStrictness
887 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
888 -- matching this string
889 | CoreDoVectorisation DPHBackend
890 | CoreDoNothing -- Useful when building up
891 | CoreDoPasses [CoreToDo] -- lists of these things
893 data SimplifierMode -- See comments in SimplMonad
895 | SimplPhase Int [String]
897 data SimplifierSwitch
898 = MaxSimplifierIterations Int
901 data FloatOutSwitches
902 = FloatOutSw Bool -- True <=> float lambdas to top level
903 Bool -- True <=> float constants to top level,
904 -- even if they do not escape a lambda
907 -- The core-to-core pass ordering is derived from the DynFlags:
908 runWhen :: Bool -> CoreToDo -> CoreToDo
909 runWhen True do_this = do_this
910 runWhen False _ = CoreDoNothing
912 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
913 runMaybe (Just x) f = f x
914 runMaybe Nothing _ = CoreDoNothing
916 getCoreToDo :: DynFlags -> [CoreToDo]
918 | Just todo <- coreToDo dflags = todo -- set explicitly by user
919 | otherwise = core_todo
921 opt_level = optLevel dflags
922 phases = simplPhases dflags
923 max_iter = maxSimplIterations dflags
924 strictness = dopt Opt_Strictness dflags
925 full_laziness = dopt Opt_FullLaziness dflags
926 cse = dopt Opt_CSE dflags
927 spec_constr = dopt Opt_SpecConstr dflags
928 liberate_case = dopt Opt_LiberateCase dflags
929 rule_check = ruleCheck dflags
930 static_args = dopt Opt_StaticArgumentTransformation dflags
932 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
934 simpl_phase phase names iter
936 [ CoreDoSimplify (SimplPhase phase names) [
937 MaxSimplifierIterations iter
939 maybe_rule_check phase
943 = runWhen (dopt Opt_Vectorise dflags)
944 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
947 -- By default, we have 2 phases before phase 0.
949 -- Want to run with inline phase 2 after the specialiser to give
950 -- maximum chance for fusion to work before we inline build/augment
951 -- in phase 1. This made a difference in 'ansi' where an
952 -- overloaded function wasn't inlined till too late.
954 -- Need phase 1 so that build/augment get
955 -- inlined. I found that spectral/hartel/genfft lost some useful
956 -- strictness in the function sumcode' if augment is not inlined
957 -- before strictness analysis runs
958 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
959 | phase <- [phases, phases-1 .. 1] ]
962 -- initial simplify: mk specialiser happy: minimum effort please
963 simpl_gently = CoreDoSimplify SimplGently [
965 -- Don't inline anything till full laziness has bitten
966 -- In particular, inlining wrappers inhibits floating
967 -- e.g. ...(case f x of ...)...
968 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
969 -- ==> ...(case x of I# x# -> case fw x# of ...)...
970 -- and now the redex (f x) isn't floatable any more
971 -- Similarly, don't apply any rules until after full
972 -- laziness. Notably, list fusion can prevent floating.
974 NoCaseOfCase, -- Don't do case-of-case transformations.
975 -- This makes full laziness work better
976 MaxSimplifierIterations max_iter
980 if opt_level == 0 then
982 simpl_phase 0 ["final"] max_iter]
983 else {- opt_level >= 1 -} [
985 -- We want to do the static argument transform before full laziness as it
986 -- may expose extra opportunities to float things outwards. However, to fix
987 -- up the output of the transformation we need at do at least one simplify
988 -- after this before anything else
989 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
991 -- We run vectorisation here for now, but we might also try to run
995 -- initial simplify: mk specialiser happy: minimum effort please
998 -- Specialisation is best done before full laziness
999 -- so that overloaded functions have all their dictionary lambdas manifest
1002 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1008 -- Phase 0: allow all Ids to be inlined now
1009 -- This gets foldr inlined before strictness analysis
1011 -- At least 3 iterations because otherwise we land up with
1012 -- huge dead expressions because of an infelicity in the
1014 -- let k = BIG in foldr k z xs
1015 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1016 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1018 simpl_phase 0 ["main"] (max max_iter 3),
1021 #ifdef OLD_STRICTNESS
1022 CoreDoOldStrictness,
1024 runWhen strictness (CoreDoPasses [
1026 CoreDoWorkerWrapper,
1028 simpl_phase 0 ["post-worker-wrapper"] max_iter
1031 runWhen full_laziness
1032 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1033 True)), -- Float constants
1034 -- nofib/spectral/hartel/wang doubles in speed if you
1035 -- do full laziness late in the day. It only happens
1036 -- after fusion and other stuff, so the early pass doesn't
1037 -- catch it. For the record, the redex is
1038 -- f_el22 (f_el21 r_midblock)
1041 runWhen cse CoreCSE,
1042 -- We want CSE to follow the final full-laziness pass, because it may
1043 -- succeed in commoning up things floated out by full laziness.
1044 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1050 -- Case-liberation for -O2. This should be after
1051 -- strictness analysis and the simplification which follows it.
1052 runWhen liberate_case (CoreDoPasses [
1054 simpl_phase 0 ["post-liberate-case"] max_iter
1055 ]), -- Run the simplifier after LiberateCase to vastly
1056 -- reduce the possiblility of shadowing
1057 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1059 runWhen spec_constr CoreDoSpecConstr,
1063 -- Final clean-up simplification:
1064 simpl_phase 0 ["final"] max_iter
1067 -- -----------------------------------------------------------------------------
1068 -- StgToDo: abstraction of stg-to-stg passes to run.
1071 = StgDoMassageForProfiling -- should be (next to) last
1072 -- There's also setStgVarInfo, but its absolute "lastness"
1073 -- is so critical that it is hardwired in (no flag).
1076 getStgToDo :: DynFlags -> [StgToDo]
1078 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1081 stg_stats = dopt Opt_StgStats dflags
1083 todo1 = if stg_stats then [D_stg_stats] else []
1085 todo2 | WayProf `elem` wayNames dflags
1086 = StgDoMassageForProfiling : todo1
1090 -- -----------------------------------------------------------------------------
1093 allFlags :: [String]
1094 allFlags = map ('-':) $
1095 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1096 map ("fno-"++) flags ++
1097 map ("f"++) flags ++
1098 map ("X"++) supportedLanguages ++
1099 map ("XNo"++) supportedLanguages
1100 where ok (PrefixPred _ _) = False
1102 flags = [ name | (name, _, _) <- fFlags ]
1104 dynamic_flags :: [Flag DynP]
1106 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1107 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1108 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1109 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1110 , Flag "v" (OptIntSuffix setVerbosity) Supported
1112 ------- Specific phases --------------------------------------------
1113 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1114 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1115 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1116 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1117 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1118 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1119 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1120 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1121 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1122 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1124 , Flag "optL" (HasArg (upd . addOptL)) Supported
1125 , Flag "optP" (HasArg (upd . addOptP)) Supported
1126 , Flag "optF" (HasArg (upd . addOptF)) Supported
1127 , Flag "optc" (HasArg (upd . addOptc)) Supported
1128 , Flag "optm" (HasArg (upd . addOptm)) Supported
1129 , Flag "opta" (HasArg (upd . addOpta)) Supported
1130 , Flag "optl" (HasArg (upd . addOptl)) Supported
1131 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1134 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1137 -------- ghc -M -----------------------------------------------------
1138 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1139 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1140 (Deprecated "Use -dep-suffix instead")
1141 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1142 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1143 (Deprecated "Use -dep-makefile instead")
1144 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1145 (Deprecated "-optdep-w doesn't do anything")
1146 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1147 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1148 (Deprecated "Use -include-pkg-deps instead")
1149 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1150 (Deprecated "Use -include-pkg-deps instead")
1151 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1152 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1153 (Deprecated "Use -exclude-module instead")
1154 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1155 (Deprecated "Use -exclude-module instead")
1157 -------- Linking ----------------------------------------------------
1158 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1160 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1161 (Deprecated "Use -c instead")
1162 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1164 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1167 ------- Libraries ---------------------------------------------------
1168 , Flag "L" (Prefix addLibraryPath ) Supported
1169 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1171 ------- Frameworks --------------------------------------------------
1172 -- -framework-path should really be -F ...
1173 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1174 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1176 ------- Output Redirection ------------------------------------------
1177 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1178 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1179 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1180 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1181 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1182 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1183 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1184 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1185 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1186 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1189 ------- Keeping temporary files -------------------------------------
1190 -- These can be singular (think ghc -c) or plural (think ghc --make)
1191 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1192 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1193 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1194 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1195 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1196 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1197 -- This only makes sense as plural
1198 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1200 ------- Miscellaneous ----------------------------------------------
1201 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1202 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1203 , Flag "main-is" (SepArg setMainIs ) Supported
1204 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1205 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1206 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1208 ------- recompilation checker --------------------------------------
1209 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1210 (Deprecated "Use -fno-force-recomp instead")
1211 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1212 (Deprecated "Use -fforce-recomp instead")
1214 ------- Packages ----------------------------------------------------
1215 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1216 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1218 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1219 , Flag "package" (HasArg exposePackage) Supported
1220 , Flag "hide-package" (HasArg hidePackage) Supported
1221 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1223 , Flag "ignore-package" (HasArg ignorePackage)
1225 , Flag "syslib" (HasArg exposePackage)
1226 (Deprecated "Use -package instead")
1228 ------ HsCpp opts ---------------------------------------------------
1229 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1230 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1232 ------- Include/Import Paths ----------------------------------------
1233 , Flag "I" (Prefix addIncludePath) Supported
1234 , Flag "i" (OptPrefix addImportPath ) Supported
1236 ------ Debugging ----------------------------------------------------
1237 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1239 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1241 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1243 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1245 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1247 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1249 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1251 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1253 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1255 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1257 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1259 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1261 , Flag "ddump-asm-regalloc-stages"
1262 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1264 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1266 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1268 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1270 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1272 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1274 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1276 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1278 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1280 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1282 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1284 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1286 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1288 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1290 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1292 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1294 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1296 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1298 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1300 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1302 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1304 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1306 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1308 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1310 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1312 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1314 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1316 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1318 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1320 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1322 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1324 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1326 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1328 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1330 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1332 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1334 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1336 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1338 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1340 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1342 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1344 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1346 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1349 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1351 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1353 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1355 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1357 , Flag "dshow-passes"
1358 (NoArg (do setDynFlag Opt_ForceRecomp
1359 setVerbosity (Just 2)))
1361 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1364 ------ Machine dependant (-m<blah>) stuff ---------------------------
1366 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1368 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1370 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1373 ------ Warning opts -------------------------------------------------
1374 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1376 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1378 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1380 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1382 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1383 (Deprecated "Use -w instead")
1384 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1387 ------ Optimisation flags ------------------------------------------
1388 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1389 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1390 (Deprecated "Use -O0 instead")
1391 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1392 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1394 -- If the number is missing, use 1
1396 , Flag "fsimplifier-phases"
1397 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1399 , Flag "fmax-simplifier-iterations"
1400 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1403 , Flag "fspec-constr-threshold"
1404 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1406 , Flag "fno-spec-constr-threshold"
1407 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1409 , Flag "fspec-constr-count"
1410 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1412 , Flag "fno-spec-constr-count"
1413 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1415 , Flag "fliberate-case-threshold"
1416 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1418 , Flag "fno-liberate-case-threshold"
1419 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1422 , Flag "frule-check"
1423 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1425 , Flag "fcontext-stack"
1426 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1429 ------ DPH flags ----------------------------------------------------
1432 (NoArg (upd (setDPHBackend DPHSeq)))
1435 (NoArg (upd (setDPHBackend DPHPar)))
1438 ------ Compiler flags -----------------------------------------------
1440 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1441 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1442 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1444 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1445 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1446 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1448 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1450 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1453 ++ map (mkFlag True "f" setDynFlag ) fFlags
1454 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1455 ++ map (mkFlag True "X" setDynFlag ) xFlags
1456 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1458 mkFlag :: Bool -- ^ True <=> it should be turned on
1459 -> String -- ^ The flag prefix
1460 -> (DynFlag -> DynP ())
1461 -> (String, DynFlag, Bool -> Deprecated)
1463 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1464 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1466 deprecatedForLanguage :: String -> Bool -> Deprecated
1467 deprecatedForLanguage lang turn_on
1468 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1470 flag | turn_on = lang
1471 | otherwise = "No"++lang
1473 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1474 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1476 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1477 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1478 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1479 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1480 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1481 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1482 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1483 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1484 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1485 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1486 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1487 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1488 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1489 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1490 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1491 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1492 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1493 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1494 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1495 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1496 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1497 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1498 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1499 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1500 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1501 ( "strictness", Opt_Strictness, const Supported ),
1502 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1503 ( "full-laziness", Opt_FullLaziness, const Supported ),
1504 ( "liberate-case", Opt_LiberateCase, const Supported ),
1505 ( "spec-constr", Opt_SpecConstr, const Supported ),
1506 ( "cse", Opt_CSE, const Supported ),
1507 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1508 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1509 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1510 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1511 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1512 ( "case-merge", Opt_CaseMerge, const Supported ),
1513 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1514 ( "method-sharing", Opt_MethodSharing, const Supported ),
1515 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1516 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1517 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1518 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1519 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1520 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1521 ( "rewrite-rules", Opt_RewriteRules, const Supported ),
1522 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1523 ( "break-on-error", Opt_BreakOnError, const Supported ),
1524 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1525 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1526 ( "run-cps", Opt_RunCPSZ, const Supported ),
1527 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1528 ( "vectorise", Opt_Vectorise, const Supported ),
1529 ( "regs-graph", Opt_RegsGraph, const Supported ),
1530 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1531 ( "th", Opt_TemplateHaskell,
1532 deprecatedForLanguage "TemplateHaskell" ),
1533 ( "fi", Opt_ForeignFunctionInterface,
1534 deprecatedForLanguage "ForeignFunctionInterface" ),
1535 ( "ffi", Opt_ForeignFunctionInterface,
1536 deprecatedForLanguage "ForeignFunctionInterface" ),
1537 ( "arrows", Opt_Arrows,
1538 deprecatedForLanguage "Arrows" ),
1539 ( "generics", Opt_Generics,
1540 deprecatedForLanguage "Generics" ),
1541 ( "implicit-prelude", Opt_ImplicitPrelude,
1542 deprecatedForLanguage "ImplicitPrelude" ),
1543 ( "bang-patterns", Opt_BangPatterns,
1544 deprecatedForLanguage "BangPatterns" ),
1545 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1546 deprecatedForLanguage "MonomorphismRestriction" ),
1547 ( "mono-pat-binds", Opt_MonoPatBinds,
1548 deprecatedForLanguage "MonoPatBinds" ),
1549 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1550 deprecatedForLanguage "ExtendedDefaultRules" ),
1551 ( "implicit-params", Opt_ImplicitParams,
1552 deprecatedForLanguage "ImplicitParams" ),
1553 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1554 deprecatedForLanguage "ScopedTypeVariables" ),
1556 deprecatedForLanguage "PArr" ),
1557 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1558 deprecatedForLanguage "OverlappingInstances" ),
1559 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1560 deprecatedForLanguage "UndecidableInstances" ),
1561 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1562 deprecatedForLanguage "IncoherentInstances" ),
1563 ( "gen-manifest", Opt_GenManifest, const Supported ),
1564 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1565 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1568 supportedLanguages :: [String]
1569 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1571 -- This may contain duplicates
1572 languageOptions :: [DynFlag]
1573 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1575 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1576 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1578 ( "CPP", Opt_Cpp, const Supported ),
1579 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1580 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1581 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1582 ( "MagicHash", Opt_MagicHash, const Supported ),
1583 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1584 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1585 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1586 ( "PatternSignatures", Opt_PatternSignatures, const Supported ),
1587 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1588 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1589 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1590 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1591 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1592 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1593 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1594 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1595 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1596 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1597 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1598 ( "Arrows", Opt_Arrows, const Supported ),
1599 ( "PArr", Opt_PArr, const Supported ),
1600 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1601 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1602 ( "Generics", Opt_Generics, const Supported ),
1604 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1605 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1606 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1607 ( "RecordPuns", Opt_RecordPuns,
1608 deprecatedForLanguage "NamedFieldPuns" ),
1609 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1610 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1611 ( "GADTs", Opt_GADTs, const Supported ),
1612 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1613 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1614 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1616 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1617 -- On by default (which is not strictly H98):
1618 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1619 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1620 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1621 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1622 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1623 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1624 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1625 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1626 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1627 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1628 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1629 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1630 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1631 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1632 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1633 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1634 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1635 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1636 ( "PackageImports", Opt_PackageImports, const Supported )
1639 impliedFlags :: [(DynFlag, [DynFlag])]
1641 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1642 -- be completely rigid for GADTs
1643 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1644 -- Note [Scoped tyvars] in TcBinds
1647 glasgowExtsFlags :: [DynFlag]
1648 glasgowExtsFlags = [
1649 Opt_PrintExplicitForalls
1650 , Opt_ForeignFunctionInterface
1651 , Opt_UnliftedFFITypes
1653 , Opt_ImplicitParams
1654 , Opt_ScopedTypeVariables
1656 , Opt_TypeSynonymInstances
1657 , Opt_StandaloneDeriving
1658 , Opt_DeriveDataTypeable
1659 , Opt_FlexibleContexts
1660 , Opt_FlexibleInstances
1661 , Opt_ConstrainedClassMethods
1662 , Opt_MultiParamTypeClasses
1663 , Opt_FunctionalDependencies
1665 , Opt_PolymorphicComponents
1666 , Opt_ExistentialQuantification
1668 , Opt_PostfixOperators
1670 , Opt_LiberalTypeSynonyms
1672 , Opt_ImpredicativeTypes
1675 , Opt_ParallelListComp
1676 , Opt_EmptyDataDecls
1677 , Opt_KindSignatures
1678 , Opt_PatternSignatures
1679 , Opt_GeneralizedNewtypeDeriving
1680 , Opt_TypeFamilies ]
1682 -- -----------------------------------------------------------------------------
1683 -- Parsing the dynamic flags.
1685 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags, [String], [String])
1686 parseDynamicFlags dflags args = do
1687 -- XXX Legacy support code
1688 -- We used to accept things like
1689 -- optdep-f -optdepdepend
1690 -- optdep-f -optdep depend
1691 -- optdep -f -optdepdepend
1692 -- optdep -f -optdep depend
1693 -- but the spaces trip up proper argument handling. So get rid of them.
1694 let f ("-optdep" : x : xs) = ("-optdep" ++ x) : f xs
1695 f (x : xs) = x : f xs
1698 let ((leftover, errs, warns), dflags')
1699 = runCmdLine (processArgs dynamic_flags args') dflags
1700 when (not (null errs)) $ do
1701 ghcError (UsageError (unlines errs))
1702 return (dflags', leftover, warns)
1704 type DynP = CmdLineP DynFlags
1706 upd :: (DynFlags -> DynFlags) -> DynP ()
1708 dfs <- getCmdLineState
1709 putCmdLineState $! (f dfs)
1711 --------------------------
1712 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1713 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1715 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1716 -- When you set f, set the ones it implies
1717 -- When you un-set f, however, we don't un-set the things it implies
1718 -- (except for -fno-glasgow-exts, which is treated specially)
1720 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1722 --------------------------
1723 setDumpFlag :: DynFlag -> OptKind DynP
1724 setDumpFlag dump_flag
1725 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1726 | otherwise = NoArg (setDynFlag dump_flag)
1728 -- Whenver we -ddump, switch off the recompilation checker,
1729 -- else you don't see the dump!
1730 -- However, certain dumpy-things are really interested in what's going
1731 -- on during recompilation checking, so in those cases we
1732 -- don't want to turn it off.
1733 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1734 Opt_D_dump_hi_diffs]
1736 setVerboseCore2Core :: DynP ()
1737 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1738 setDynFlag Opt_D_verbose_core2core
1739 upd (\s -> s { shouldDumpSimplPhase = const True })
1741 setDumpSimplPhases :: String -> DynP ()
1742 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1743 upd (\s -> s { shouldDumpSimplPhase = spec })
1745 spec :: SimplifierMode -> Bool
1747 . map (join (&&) . map match . split ':')
1753 join :: (Bool -> Bool -> Bool)
1754 -> [SimplifierMode -> Bool]
1755 -> SimplifierMode -> Bool
1756 join _ [] = const True
1757 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1759 match :: String -> SimplifierMode -> Bool
1760 match "" = const True
1761 match s = case reads s of
1762 [(n,"")] -> phase_num n
1765 phase_num :: Int -> SimplifierMode -> Bool
1766 phase_num n (SimplPhase k _) = n == k
1767 phase_num _ _ = False
1769 phase_name :: String -> SimplifierMode -> Bool
1770 phase_name s SimplGently = s == "gentle"
1771 phase_name s (SimplPhase _ ss) = s `elem` ss
1773 setVerbosity :: Maybe Int -> DynP ()
1774 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1776 addCmdlineHCInclude :: String -> DynP ()
1777 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1779 extraPkgConf_ :: FilePath -> DynP ()
1780 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1782 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1784 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1786 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1788 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1790 setPackageName :: String -> DynFlags -> DynFlags
1792 | Nothing <- unpackPackageId pid
1793 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1795 = \s -> s{ thisPackage = pid }
1797 pid = stringToPackageId p
1799 -- If we're linking a binary, then only targets that produce object
1800 -- code are allowed (requests for other target types are ignored).
1801 setTarget :: HscTarget -> DynP ()
1802 setTarget l = upd set
1805 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1808 -- Changes the target only if we're compiling object code. This is
1809 -- used by -fasm and -fvia-C, which switch from one to the other, but
1810 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1811 -- can be safely used in an OPTIONS_GHC pragma.
1812 setObjTarget :: HscTarget -> DynP ()
1813 setObjTarget l = upd set
1816 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1819 setOptLevel :: Int -> DynFlags -> DynFlags
1820 setOptLevel n dflags
1821 | hscTarget dflags == HscInterpreted && n > 0
1823 -- not in IO any more, oh well:
1824 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1826 = updOptLevel n dflags
1829 -- -Odph is equivalent to
1831 -- -O2 optimise as much as possible
1832 -- -fno-method-sharing sharing specialisation defeats fusion
1834 -- -fdicts-cheap always inline dictionaries
1835 -- -fmax-simplifier-iterations20 this is necessary sometimes
1836 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1838 setDPHOpt :: DynFlags -> DynFlags
1839 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1840 , specConstrThreshold = Nothing
1842 `dopt_set` Opt_DictsCheap
1843 `dopt_unset` Opt_MethodSharing
1845 data DPHBackend = DPHPar
1848 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1849 setDPHBackend backend dflags = dflags { dphBackend = backend }
1852 setMainIs :: String -> DynP ()
1854 | not (null main_fn) && isLower (head main_fn)
1855 -- The arg looked like "Foo.Bar.baz"
1856 = upd $ \d -> d{ mainFunIs = Just main_fn,
1857 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1859 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1860 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1862 | otherwise -- The arg looked like "baz"
1863 = upd $ \d -> d{ mainFunIs = Just arg }
1865 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1867 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1868 -- Either returns the default name or the one configured on the command line with -main-is
1869 getMainFun :: DynFlags -> RdrName
1870 getMainFun dflags = case (mainFunIs dflags) of
1871 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1872 Nothing -> main_RDR_Unqual
1874 -----------------------------------------------------------------------------
1875 -- Paths & Libraries
1877 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1879 -- -i on its own deletes the import paths
1880 addImportPath "" = upd (\s -> s{importPaths = []})
1881 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1885 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1888 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1890 addFrameworkPath p =
1891 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1893 #ifndef mingw32_TARGET_OS
1894 split_marker :: Char
1895 split_marker = ':' -- not configurable (ToDo)
1898 splitPathList :: String -> [String]
1899 splitPathList s = filter notNull (splitUp s)
1900 -- empty paths are ignored: there might be a trailing
1901 -- ':' in the initial list, for example. Empty paths can
1902 -- cause confusion when they are translated into -I options
1903 -- for passing to gcc.
1905 #ifndef mingw32_TARGET_OS
1906 splitUp xs = split split_marker xs
1908 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1910 -- That is, if "foo:bar:baz" is used, this interpreted as
1911 -- consisting of three entries, 'foo', 'bar', 'baz'.
1912 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1913 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1915 -- Notice that no attempt is made to fully replace the 'standard'
1916 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1917 -- that this will cause too much breakage for users & ':' will
1918 -- work fine even with DOS paths, if you're not insisting on being silly.
1921 splitUp (x:':':div:xs) | div `elem` dir_markers
1922 = ((x:':':div:p): splitUp rs)
1924 (p,rs) = findNextPath xs
1925 -- we used to check for existence of the path here, but that
1926 -- required the IO monad to be threaded through the command-line
1927 -- parser which is quite inconvenient. The
1928 splitUp xs = cons p (splitUp rs)
1930 (p,rs) = findNextPath xs
1935 -- will be called either when we've consumed nought or the
1936 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1937 -- finding the next split marker.
1939 case break (`elem` split_markers) xs of
1940 (p, _:ds) -> (p, ds)
1943 split_markers :: [Char]
1944 split_markers = [':', ';']
1946 dir_markers :: [Char]
1947 dir_markers = ['/', '\\']
1950 -- -----------------------------------------------------------------------------
1951 -- tmpDir, where we store temporary files.
1953 setTmpDir :: FilePath -> DynFlags -> DynFlags
1954 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1955 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1956 -- seem necessary now --SDM 7/2/2008
1958 -----------------------------------------------------------------------------
1961 setOptHpcDir :: String -> DynP ()
1962 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1964 -----------------------------------------------------------------------------
1965 -- Via-C compilation stuff
1967 -- There are some options that we need to pass to gcc when compiling
1968 -- Haskell code via C, but are only supported by recent versions of
1969 -- gcc. The configure script decides which of these options we need,
1970 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1971 -- read before each via-C compilation. The advantage of having these
1972 -- in a separate file is that the file can be created at install-time
1973 -- depending on the available gcc version, and even re-generated later
1974 -- if gcc is upgraded.
1976 -- The options below are not dependent on the version of gcc, only the
1979 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1980 [String]) -- for registerised HC compilations
1981 machdepCCOpts _dflags
1982 #if alpha_TARGET_ARCH
1984 #ifdef HAVE_THREADED_RTS_SUPPORT
1988 -- For now, to suppress the gcc warning "call-clobbered
1989 -- register used for global register variable", we simply
1990 -- disable all warnings altogether using the -w flag. Oh well.
1992 #elif hppa_TARGET_ARCH
1993 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1994 -- (very nice, but too bad the HP /usr/include files don't agree.)
1995 = ( ["-D_HPUX_SOURCE"], [] )
1997 #elif m68k_TARGET_ARCH
1998 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1999 -- popping of args to routines to be explicit; if we let things
2000 -- be deferred 'til after an STGJUMP, imminent death is certain!
2002 -- -fomit-frame-pointer : *don't*
2003 -- It's better to have a6 completely tied up being a frame pointer
2004 -- rather than let GCC pick random things to do with it.
2005 -- (If we want to steal a6, then we would try to do things
2006 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2007 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2009 #elif i386_TARGET_ARCH
2010 -- -fno-defer-pop : basically the same game as for m68k
2012 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2013 -- the fp (%ebp) for our register maps.
2014 = let n_regs = stolen_x86_regs _dflags
2017 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2020 "-fomit-frame-pointer",
2021 -- we want -fno-builtin, because when gcc inlines
2022 -- built-in functions like memcpy() it tends to
2023 -- run out of registers, requiring -monly-n-regs
2025 "-DSTOLEN_X86_REGS="++show n_regs ]
2028 #elif ia64_TARGET_ARCH
2029 = ( [], ["-fomit-frame-pointer", "-G0"] )
2031 #elif x86_64_TARGET_ARCH
2032 = ( [], ["-fomit-frame-pointer",
2033 "-fno-asynchronous-unwind-tables",
2034 -- the unwind tables are unnecessary for HC code,
2035 -- and get in the way of -split-objs. Another option
2036 -- would be to throw them away in the mangler, but this
2039 -- calling builtins like strlen() using the FFI can
2040 -- cause gcc to run out of regs, so use the external
2044 #elif sparc_TARGET_ARCH
2046 -- For now, to suppress the gcc warning "call-clobbered
2047 -- register used for global register variable", we simply
2048 -- disable all warnings altogether using the -w flag. Oh well.
2050 #elif powerpc_apple_darwin_TARGET
2052 -- Disable Apple's precompiling preprocessor. It's a great thing
2053 -- for "normal" programs, but it doesn't support register variable
2055 = ( [], ["-no-cpp-precomp"] )
2060 picCCOpts :: DynFlags -> [String]
2062 #if darwin_TARGET_OS
2063 -- Apple prefers to do things the other way round.
2064 -- PIC is on by default.
2065 -- -mdynamic-no-pic:
2066 -- Turn off PIC code generation.
2068 -- Don't generate "common" symbols - these are unwanted
2069 -- in dynamic libraries.
2072 = ["-fno-common", "-D__PIC__"]
2074 = ["-mdynamic-no-pic"]
2075 #elif mingw32_TARGET_OS
2076 -- no -fPIC for Windows
2083 = ["-fPIC", "-D__PIC__"]
2088 -- -----------------------------------------------------------------------------
2092 can_split = cSplitObjs == "YES"
2094 -- -----------------------------------------------------------------------------
2097 compilerInfo :: [(String, String)]
2098 compilerInfo = [("Project name", cProjectName),
2099 ("Project version", cProjectVersion),
2100 ("Booter version", cBooterVersion),
2102 ("Interface file version", cHscIfaceFileVersion),
2103 ("Have interpreter", cGhcWithInterpreter),
2104 ("Object splitting", cSplitObjs),
2105 ("Have native code generator", cGhcWithNativeCodeGen),
2106 ("Support SMP", cGhcWithSMP),
2107 ("Unregisterised", cGhcUnregisterised),
2108 ("Tables next to code", cGhcEnableTablesNextToCode),
2109 ("Win32 DLLs", cEnableWin32DLLs),
2110 ("RTS ways", cGhcRTSWays),
2111 ("Leading underscore", cLeadingUnderscore),
2112 ("Debug on", show debugIsOn)