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 )
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_ParallelListComp
233 | Opt_TransformListComp
234 | Opt_GeneralizedNewtypeDeriving
236 | Opt_PostfixOperators
238 | Opt_LiberalTypeSynonyms
241 | Opt_ImpredicativeTypes
245 | Opt_PrintExplicitForalls
250 | Opt_StaticArgumentTransformation
254 | Opt_IgnoreInterfacePragmas
255 | Opt_OmitInterfacePragmas
256 | Opt_DoLambdaEtaExpansion
260 | Opt_UnboxStrictFields
263 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
265 | Opt_RegsGraph -- do graph coloring register allocation
266 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
274 | Opt_ExcessPrecision
275 | Opt_ReadUserPackageConf
279 | Opt_HideAllPackages
280 | Opt_PrintBindResult
284 | Opt_BreakOnException
286 | Opt_PrintEvldWithShow
287 | Opt_PrintBindContents
291 | Opt_ConvertToZipCfgAndBack
292 | Opt_AutoLinkPackages
293 | Opt_ImplicitImportQualified
304 -- | Contains not only a collection of 'DynFlag's but also a plethora of
305 -- information relating to the compilation of a single file or GHC session
306 data DynFlags = DynFlags {
309 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
310 stgToDo :: Maybe [StgToDo], -- similarly
311 hscTarget :: HscTarget,
312 hscOutName :: String, -- ^ Name of the output file
313 extCoreName :: String, -- ^ Name of the .core output file
314 verbosity :: Int, -- ^ Verbosity level: see "DynFlags#verbosity_levels"
315 optLevel :: Int, -- ^ Optimisation level
316 simplPhases :: Int, -- ^ Number of simplifier phases
317 maxSimplIterations :: Int, -- ^ Max simplifier iterations
318 shouldDumpSimplPhase :: SimplifierMode -> Bool,
319 ruleCheck :: Maybe String,
321 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
322 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
323 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
325 stolen_x86_regs :: Int,
326 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
327 importPaths :: [FilePath],
329 mainFunIs :: Maybe String,
330 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
332 dphBackend :: DPHBackend,
334 thisPackage :: PackageId,
337 wayNames :: [WayName], -- ^ Way flags from the command line
338 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
339 rtsBuildTag :: String, -- ^ The RTS \"way\"
342 objectDir :: Maybe String,
343 hiDir :: Maybe String,
344 stubDir :: Maybe String,
350 outputFile :: Maybe String,
351 outputHi :: Maybe String,
352 dynLibLoader :: DynLibLoader,
354 -- | This is set by 'DriverPipeline.runPipeline' based on where
355 -- its output is going.
356 dumpPrefix :: Maybe FilePath,
358 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
359 -- Set by @-ddump-file-prefix@
360 dumpPrefixForce :: Maybe FilePath,
362 includePaths :: [String],
363 libraryPaths :: [String],
364 frameworkPaths :: [String], -- used on darwin only
365 cmdlineFrameworks :: [String], -- ditto
366 tmpDir :: String, -- no trailing '/'
368 ghcUsagePath :: FilePath, -- Filled in by SysTools
369 ghciUsagePath :: FilePath, -- ditto
371 hpcDir :: String, -- ^ Path to store the .mix files
373 -- options for particular phases
381 opt_windres :: [String],
383 -- commands for particular phases
385 pgm_P :: (String,[Option]),
387 pgm_c :: (String,[Option]),
388 pgm_m :: (String,[Option]),
389 pgm_s :: (String,[Option]),
390 pgm_a :: (String,[Option]),
391 pgm_l :: (String,[Option]),
392 pgm_dll :: (String,[Option]),
394 pgm_sysman :: String,
395 pgm_windres :: String,
398 depMakefile :: FilePath,
399 depIncludePkgDeps :: Bool,
400 depExcludeMods :: [ModuleName],
401 depSuffixes :: [String],
405 extraPkgConfs :: [FilePath],
406 topDir :: FilePath, -- filled in by SysTools
407 systemPackageConfig :: FilePath, -- ditto
408 -- ^ The @-package-conf@ flags given on the command line, in the order
411 packageFlags :: [PackageFlag],
412 -- ^ The @-package@ and @-hide-package@ flags from the command-line
415 -- NB. do not modify this field, it is calculated by
416 -- Packages.initPackages and Packages.updatePackages.
417 pkgDatabase :: Maybe (UniqFM PackageConfig),
418 pkgState :: PackageState,
423 -- | Message output action: use "ErrUtils" instead of this if you can
424 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
426 haddockOptions :: Maybe String
437 -- | Will this target result in an object file on the disk?
438 isObjectTarget :: HscTarget -> Bool
439 isObjectTarget HscC = True
440 isObjectTarget HscAsm = True
441 isObjectTarget _ = False
443 -- | The 'GhcMode' tells us whether we're doing multi-module
444 -- compilation (controlled via the "GHC" API) or one-shot
445 -- (single-module) compilation. This makes a difference primarily to
446 -- the "Finder": in one-shot mode we look for interface files for
447 -- imported modules, but in multi-module mode we look for source files
448 -- in order to check whether they need to be recompiled.
450 = CompManager -- ^ @\-\-make@, GHCi, etc.
451 | OneShot -- ^ @ghc -c Foo.hs@
452 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
455 isOneShot :: GhcMode -> Bool
456 isOneShot OneShot = True
457 isOneShot _other = False
459 -- | What to do in the link step, if there is one.
461 = NoLink -- ^ Don't link at all
462 | LinkBinary -- ^ Link object code into a binary
463 | LinkInMemory -- ^ Use the in-memory dynamic linker
464 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
467 isNoLink :: GhcLink -> Bool
468 isNoLink NoLink = True
472 = ExposePackage String
474 | IgnorePackage String
477 defaultHscTarget :: HscTarget
478 defaultHscTarget = defaultObjectTarget
480 -- | The 'HscTarget' value corresponding to the default way to create
481 -- object files on the current platform.
482 defaultObjectTarget :: HscTarget
484 | cGhcWithNativeCodeGen == "YES" = HscAsm
489 | Wrapped (Maybe String)
493 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
494 initDynFlags :: DynFlags -> IO DynFlags
495 initDynFlags dflags = do
496 -- someday these will be dynamic flags
497 ways <- readIORef v_Ways
498 build_tag <- readIORef v_Build_tag
499 rts_build_tag <- readIORef v_RTS_Build_tag
502 buildTag = build_tag,
503 rtsBuildTag = rts_build_tag
506 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
507 -- and must be fully initialized by 'GHC.newSession' first.
508 defaultDynFlags :: DynFlags
511 ghcMode = CompManager,
512 ghcLink = LinkBinary,
515 hscTarget = defaultHscTarget,
521 maxSimplIterations = 4,
522 shouldDumpSimplPhase = const False,
524 specConstrThreshold = Just 200,
525 specConstrCount = Just 3,
526 liberateCaseThreshold = Just 200,
528 cmdlineHcIncludes = [],
532 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
536 thisPackage = mainPackageId,
542 objectSuf = phaseInputExt StopLn,
543 hcSuf = phaseInputExt HCc,
546 outputFile = Nothing,
548 dynLibLoader = Deployable,
549 dumpPrefix = Nothing,
550 dumpPrefixForce = Nothing,
554 cmdlineFrameworks = [],
555 tmpDir = cDEFAULT_TMPDIR,
572 pkgDatabase = Nothing,
573 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
574 wayNames = panic "defaultDynFlags: No wayNames",
575 buildTag = panic "defaultDynFlags: No buildTag",
576 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
577 -- initSysTools fills all these in
578 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
579 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
580 topDir = panic "defaultDynFlags: No topDir",
581 systemPackageConfig = panic "defaultDynFlags: No systemPackageConfig",
582 pgm_L = panic "defaultDynFlags: No pgm_L",
583 pgm_P = panic "defaultDynFlags: No pgm_P",
584 pgm_F = panic "defaultDynFlags: No pgm_F",
585 pgm_c = panic "defaultDynFlags: No pgm_c",
586 pgm_m = panic "defaultDynFlags: No pgm_m",
587 pgm_s = panic "defaultDynFlags: No pgm_s",
588 pgm_a = panic "defaultDynFlags: No pgm_a",
589 pgm_l = panic "defaultDynFlags: No pgm_l",
590 pgm_dll = panic "defaultDynFlags: No pgm_dll",
591 pgm_T = panic "defaultDynFlags: No pgm_T",
592 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
593 pgm_windres = panic "defaultDynFlags: No pgm_windres",
594 -- end of initSysTools values
596 depMakefile = "Makefile",
597 depIncludePkgDeps = False,
601 -- end of ghc -M values
602 haddockOptions = Nothing,
604 Opt_AutoLinkPackages,
605 Opt_ReadUserPackageConf,
607 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
608 -- behaviour the default, to see if anyone notices
612 Opt_MonomorphismRestriction,
620 Opt_PrintBindContents
622 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
623 -- The default -O0 options
626 log_action = \severity srcSpan style msg ->
628 SevInfo -> printErrs (msg style)
629 SevFatal -> printErrs (msg style)
632 printErrs ((mkLocMessage srcSpan msg) style)
633 -- careful (#2302): printErrs prints in UTF-8, whereas
634 -- converting to string first and using hPutStr would
635 -- just emit the low 8 bits of each unicode char.
642 0 | print errors & warnings only
643 1 | minimal verbosity: print "compiling M ... done." for each module.
644 2 | equivalent to -dshow-passes
645 3 | equivalent to existing "ghc -v"
646 4 | "ghc -v -ddump-most"
647 5 | "ghc -v -ddump-all"
650 -- | Test whether a 'DynFlag' is set
651 dopt :: DynFlag -> DynFlags -> Bool
652 dopt f dflags = f `elem` (flags dflags)
655 dopt_set :: DynFlags -> DynFlag -> DynFlags
656 dopt_set dfs f = dfs{ flags = f : flags dfs }
658 -- | Unset a 'DynFlag'
659 dopt_unset :: DynFlags -> DynFlag -> DynFlags
660 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
662 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
663 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
664 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
665 -> [a] -- ^ Correctly ordered extracted options
666 getOpts dflags opts = reverse (opts dflags)
667 -- We add to the options from the front, so we need to reverse the list
669 -- | Gets the verbosity flag for the current verbosity level. This is fed to
670 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
671 getVerbFlag :: DynFlags -> String
673 | verbosity dflags >= 3 = "-v"
676 setObjectDir, setHiDir, setStubDir, setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
677 setPgmP, setPgmL, setPgmF, setPgmc, setPgmm, setPgms, setPgma, setPgml, setPgmdll, setPgmwindres,
678 addOptL, addOptP, addOptF, addOptc, addOptm, addOpta, addOptl, addOptwindres,
679 addCmdlineFramework, addHaddockOpts
680 :: String -> DynFlags -> DynFlags
681 setOutputFile, setOutputHi, setDumpPrefixForce
682 :: Maybe String -> DynFlags -> DynFlags
684 setObjectDir f d = d{ objectDir = Just f}
685 setHiDir f d = d{ hiDir = Just f}
686 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
687 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
688 -- \#included from the .hc file when compiling with -fvia-C.
690 setObjectSuf f d = d{ objectSuf = f}
691 setHiSuf f d = d{ hiSuf = f}
692 setHcSuf f d = d{ hcSuf = f}
694 setOutputFile f d = d{ outputFile = f}
695 setOutputHi f d = d{ outputHi = f}
697 parseDynLibLoaderMode f d =
699 ("deploy", "") -> d{ dynLibLoader = Deployable }
700 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
701 ("wrapped", "") -> d{ dynLibLoader = Wrapped Nothing }
702 ("wrapped:", "hard") -> d{ dynLibLoader = Wrapped Nothing }
703 ("wrapped:", flex) -> d{ dynLibLoader = Wrapped (Just flex) }
704 (_,_) -> error "Unknown dynlib loader"
706 setDumpPrefixForce f d = d { dumpPrefixForce = f}
708 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
709 -- Config.hs should really use Option.
710 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
712 setPgmL f d = d{ pgm_L = f}
713 setPgmF f d = d{ pgm_F = f}
714 setPgmc f d = d{ pgm_c = (f,[])}
715 setPgmm f d = d{ pgm_m = (f,[])}
716 setPgms f d = d{ pgm_s = (f,[])}
717 setPgma f d = d{ pgm_a = (f,[])}
718 setPgml f d = d{ pgm_l = (f,[])}
719 setPgmdll f d = d{ pgm_dll = (f,[])}
720 setPgmwindres f d = d{ pgm_windres = f}
722 addOptL f d = d{ opt_L = f : opt_L d}
723 addOptP f d = d{ opt_P = f : opt_P d}
724 addOptF f d = d{ opt_F = f : opt_F d}
725 addOptc f d = d{ opt_c = f : opt_c d}
726 addOptm f d = d{ opt_m = f : opt_m d}
727 addOpta f d = d{ opt_a = f : opt_a d}
728 addOptl f d = d{ opt_l = f : opt_l d}
729 addOptwindres f d = d{ opt_windres = f : opt_windres d}
731 setDepMakefile :: FilePath -> DynFlags -> DynFlags
732 setDepMakefile f d = d { depMakefile = deOptDep f }
734 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
735 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
737 addDepExcludeMod :: String -> DynFlags -> DynFlags
739 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
741 addDepSuffix :: FilePath -> DynFlags -> DynFlags
742 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
744 setDepWarnings :: Bool -> DynFlags -> DynFlags
745 setDepWarnings b d = d { depWarnings = b }
748 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
749 -- we need to strip the "-optdep" off of the arg
750 deOptDep :: String -> String
751 deOptDep x = case maybePrefixMatch "-optdep" x of
755 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
757 addHaddockOpts f d = d{ haddockOptions = Just f}
759 -- -----------------------------------------------------------------------------
760 -- Command-line options
762 -- | When invoking external tools as part of the compilation pipeline, we
763 -- pass these a sequence of options on the command-line. Rather than
764 -- just using a list of Strings, we use a type that allows us to distinguish
765 -- between filepaths and 'other stuff'. The reason for this is that
766 -- this type gives us a handle on transforming filenames, and filenames only,
767 -- to whatever format they're expected to be on a particular platform.
769 = FileOption -- an entry that _contains_ filename(s) / filepaths.
770 String -- a non-filepath prefix that shouldn't be
771 -- transformed (e.g., "/out=")
772 String -- the filepath/filename portion
775 -----------------------------------------------------------------------------
776 -- Setting the optimisation level
778 updOptLevel :: Int -> DynFlags -> DynFlags
779 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
781 = dfs2{ optLevel = final_n }
783 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
784 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
785 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
787 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
788 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
790 optLevelFlags :: [([Int], DynFlag)]
792 = [ ([0], Opt_IgnoreInterfacePragmas)
793 , ([0], Opt_OmitInterfacePragmas)
795 , ([1,2], Opt_IgnoreAsserts)
796 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
798 , ([1,2], Opt_DoEtaReduction)
799 , ([1,2], Opt_CaseMerge)
800 , ([1,2], Opt_Strictness)
802 , ([1,2], Opt_FullLaziness)
804 , ([2], Opt_LiberateCase)
805 , ([2], Opt_SpecConstr)
806 , ([2], Opt_StaticArgumentTransformation)
808 , ([0,1,2], Opt_DoLambdaEtaExpansion)
809 -- This one is important for a tiresome reason:
810 -- we want to make sure that the bindings for data
811 -- constructors are eta-expanded. This is probably
812 -- a good thing anyway, but it seems fragile.
815 -- -----------------------------------------------------------------------------
816 -- Standard sets of warning options
818 standardWarnings :: [DynFlag]
820 = [ Opt_WarnWarningsDeprecations,
821 Opt_WarnDeprecatedFlags,
822 Opt_WarnUnrecognisedPragmas,
823 Opt_WarnOverlappingPatterns,
824 Opt_WarnMissingFields,
825 Opt_WarnMissingMethods,
826 Opt_WarnDuplicateExports,
827 Opt_WarnDodgyForeignImports
830 minusWOpts :: [DynFlag]
832 = standardWarnings ++
833 [ Opt_WarnUnusedBinds,
834 Opt_WarnUnusedMatches,
835 Opt_WarnUnusedImports,
836 Opt_WarnIncompletePatterns,
840 minusWallOpts :: [DynFlag]
843 [ Opt_WarnTypeDefaults,
844 Opt_WarnNameShadowing,
850 -- minuswRemovesOpts should be every warning option
851 minuswRemovesOpts :: [DynFlag]
854 [Opt_WarnImplicitPrelude,
855 Opt_WarnIncompletePatternsRecUpd,
856 Opt_WarnSimplePatterns,
857 Opt_WarnMonomorphism,
858 Opt_WarnUnrecognisedPragmas,
862 -- -----------------------------------------------------------------------------
863 -- CoreToDo: abstraction of core-to-core passes to run.
865 data CoreToDo -- These are diff core-to-core passes,
866 -- which may be invoked in any order,
867 -- as many times as you like.
869 = CoreDoSimplify -- The core-to-core simplifier.
872 -- Each run of the simplifier can take a different
873 -- set of simplifier-specific flags.
875 | CoreDoFloatOutwards FloatOutSwitches
880 | CoreDoWorkerWrapper
883 | CoreDoOldStrictness
886 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
887 -- matching this string
888 | CoreDoVectorisation DPHBackend
889 | CoreDoNothing -- Useful when building up
890 | CoreDoPasses [CoreToDo] -- lists of these things
892 data SimplifierMode -- See comments in SimplMonad
894 | SimplPhase Int [String]
896 data SimplifierSwitch
897 = MaxSimplifierIterations Int
900 data FloatOutSwitches
901 = FloatOutSw Bool -- True <=> float lambdas to top level
902 Bool -- True <=> float constants to top level,
903 -- even if they do not escape a lambda
906 -- The core-to-core pass ordering is derived from the DynFlags:
907 runWhen :: Bool -> CoreToDo -> CoreToDo
908 runWhen True do_this = do_this
909 runWhen False _ = CoreDoNothing
911 runMaybe :: Maybe a -> (a -> CoreToDo) -> CoreToDo
912 runMaybe (Just x) f = f x
913 runMaybe Nothing _ = CoreDoNothing
915 getCoreToDo :: DynFlags -> [CoreToDo]
917 | Just todo <- coreToDo dflags = todo -- set explicitly by user
918 | otherwise = core_todo
920 opt_level = optLevel dflags
921 phases = simplPhases dflags
922 max_iter = maxSimplIterations dflags
923 strictness = dopt Opt_Strictness dflags
924 full_laziness = dopt Opt_FullLaziness dflags
925 cse = dopt Opt_CSE dflags
926 spec_constr = dopt Opt_SpecConstr dflags
927 liberate_case = dopt Opt_LiberateCase dflags
928 rule_check = ruleCheck dflags
929 static_args = dopt Opt_StaticArgumentTransformation dflags
931 maybe_rule_check phase = runMaybe rule_check (CoreDoRuleCheck phase)
933 simpl_phase phase names iter
935 [ CoreDoSimplify (SimplPhase phase names) [
936 MaxSimplifierIterations iter
938 maybe_rule_check phase
942 = runWhen (dopt Opt_Vectorise dflags)
943 $ CoreDoPasses [ simpl_gently, CoreDoVectorisation (dphBackend dflags) ]
946 -- By default, we have 2 phases before phase 0.
948 -- Want to run with inline phase 2 after the specialiser to give
949 -- maximum chance for fusion to work before we inline build/augment
950 -- in phase 1. This made a difference in 'ansi' where an
951 -- overloaded function wasn't inlined till too late.
953 -- Need phase 1 so that build/augment get
954 -- inlined. I found that spectral/hartel/genfft lost some useful
955 -- strictness in the function sumcode' if augment is not inlined
956 -- before strictness analysis runs
957 simpl_phases = CoreDoPasses [ simpl_phase phase ["main"] max_iter
958 | phase <- [phases, phases-1 .. 1] ]
961 -- initial simplify: mk specialiser happy: minimum effort please
962 simpl_gently = CoreDoSimplify SimplGently [
964 -- Don't inline anything till full laziness has bitten
965 -- In particular, inlining wrappers inhibits floating
966 -- e.g. ...(case f x of ...)...
967 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
968 -- ==> ...(case x of I# x# -> case fw x# of ...)...
969 -- and now the redex (f x) isn't floatable any more
970 -- Similarly, don't apply any rules until after full
971 -- laziness. Notably, list fusion can prevent floating.
973 NoCaseOfCase, -- Don't do case-of-case transformations.
974 -- This makes full laziness work better
975 MaxSimplifierIterations max_iter
979 if opt_level == 0 then
981 simpl_phase 0 ["final"] max_iter]
982 else {- opt_level >= 1 -} [
984 -- We want to do the static argument transform before full laziness as it
985 -- may expose extra opportunities to float things outwards. However, to fix
986 -- up the output of the transformation we need at do at least one simplify
987 -- after this before anything else
988 runWhen static_args (CoreDoPasses [ simpl_gently, CoreDoStaticArgs ]),
990 -- We run vectorisation here for now, but we might also try to run
994 -- initial simplify: mk specialiser happy: minimum effort please
997 -- Specialisation is best done before full laziness
998 -- so that overloaded functions have all their dictionary lambdas manifest
1001 runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
1007 -- Phase 0: allow all Ids to be inlined now
1008 -- This gets foldr inlined before strictness analysis
1010 -- At least 3 iterations because otherwise we land up with
1011 -- huge dead expressions because of an infelicity in the
1013 -- let k = BIG in foldr k z xs
1014 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
1015 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
1017 simpl_phase 0 ["main"] (max max_iter 3),
1020 #ifdef OLD_STRICTNESS
1021 CoreDoOldStrictness,
1023 runWhen strictness (CoreDoPasses [
1025 CoreDoWorkerWrapper,
1027 simpl_phase 0 ["post-worker-wrapper"] max_iter
1030 runWhen full_laziness
1031 (CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
1032 True)), -- Float constants
1033 -- nofib/spectral/hartel/wang doubles in speed if you
1034 -- do full laziness late in the day. It only happens
1035 -- after fusion and other stuff, so the early pass doesn't
1036 -- catch it. For the record, the redex is
1037 -- f_el22 (f_el21 r_midblock)
1040 runWhen cse CoreCSE,
1041 -- We want CSE to follow the final full-laziness pass, because it may
1042 -- succeed in commoning up things floated out by full laziness.
1043 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
1049 -- Case-liberation for -O2. This should be after
1050 -- strictness analysis and the simplification which follows it.
1051 runWhen liberate_case (CoreDoPasses [
1053 simpl_phase 0 ["post-liberate-case"] max_iter
1054 ]), -- Run the simplifier after LiberateCase to vastly
1055 -- reduce the possiblility of shadowing
1056 -- Reason: see Note [Shadowing] in SpecConstr.lhs
1058 runWhen spec_constr CoreDoSpecConstr,
1062 -- Final clean-up simplification:
1063 simpl_phase 0 ["final"] max_iter
1066 -- -----------------------------------------------------------------------------
1067 -- StgToDo: abstraction of stg-to-stg passes to run.
1070 = StgDoMassageForProfiling -- should be (next to) last
1071 -- There's also setStgVarInfo, but its absolute "lastness"
1072 -- is so critical that it is hardwired in (no flag).
1075 getStgToDo :: DynFlags -> [StgToDo]
1077 | Just todo <- stgToDo dflags = todo -- set explicitly by user
1080 stg_stats = dopt Opt_StgStats dflags
1082 todo1 = if stg_stats then [D_stg_stats] else []
1084 todo2 | WayProf `elem` wayNames dflags
1085 = StgDoMassageForProfiling : todo1
1089 -- -----------------------------------------------------------------------------
1092 allFlags :: [String]
1093 allFlags = map ('-':) $
1094 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1095 map ("fno-"++) flags ++
1096 map ("f"++) flags ++
1097 map ("X"++) supportedLanguages ++
1098 map ("XNo"++) supportedLanguages
1099 where ok (PrefixPred _ _) = False
1101 flags = [ name | (name, _, _) <- fFlags ]
1103 dynamic_flags :: [Flag DynP]
1105 Flag "n" (NoArg (setDynFlag Opt_DryRun)) Supported
1106 , Flag "cpp" (NoArg (setDynFlag Opt_Cpp)) Supported
1107 , Flag "F" (NoArg (setDynFlag Opt_Pp)) Supported
1108 , Flag "#include" (HasArg (addCmdlineHCInclude)) Supported
1109 , Flag "v" (OptIntSuffix setVerbosity) Supported
1111 ------- Specific phases --------------------------------------------
1112 , Flag "pgmL" (HasArg (upd . setPgmL)) Supported
1113 , Flag "pgmP" (HasArg (upd . setPgmP)) Supported
1114 , Flag "pgmF" (HasArg (upd . setPgmF)) Supported
1115 , Flag "pgmc" (HasArg (upd . setPgmc)) Supported
1116 , Flag "pgmm" (HasArg (upd . setPgmm)) Supported
1117 , Flag "pgms" (HasArg (upd . setPgms)) Supported
1118 , Flag "pgma" (HasArg (upd . setPgma)) Supported
1119 , Flag "pgml" (HasArg (upd . setPgml)) Supported
1120 , Flag "pgmdll" (HasArg (upd . setPgmdll)) Supported
1121 , Flag "pgmwindres" (HasArg (upd . setPgmwindres)) Supported
1123 , Flag "optL" (HasArg (upd . addOptL)) Supported
1124 , Flag "optP" (HasArg (upd . addOptP)) Supported
1125 , Flag "optF" (HasArg (upd . addOptF)) Supported
1126 , Flag "optc" (HasArg (upd . addOptc)) Supported
1127 , Flag "optm" (HasArg (upd . addOptm)) Supported
1128 , Flag "opta" (HasArg (upd . addOpta)) Supported
1129 , Flag "optl" (HasArg (upd . addOptl)) Supported
1130 , Flag "optwindres" (HasArg (upd . addOptwindres)) Supported
1133 (NoArg (if can_split then setDynFlag Opt_SplitObjs else return ()))
1136 -------- ghc -M -----------------------------------------------------
1137 , Flag "dep-suffix" (HasArg (upd . addDepSuffix)) Supported
1138 , Flag "optdep-s" (HasArg (upd . addDepSuffix))
1139 (Deprecated "Use -dep-suffix instead")
1140 , Flag "dep-makefile" (HasArg (upd . setDepMakefile)) Supported
1141 , Flag "optdep-f" (HasArg (upd . setDepMakefile))
1142 (Deprecated "Use -dep-makefile instead")
1143 , Flag "optdep-w" (NoArg (upd (setDepWarnings False)))
1144 (Deprecated "-optdep-w doesn't do anything")
1145 , Flag "include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True))) Supported
1146 , Flag "optdep--include-prelude" (NoArg (upd (setDepIncludePkgDeps True)))
1147 (Deprecated "Use -include-pkg-deps instead")
1148 , Flag "optdep--include-pkg-deps" (NoArg (upd (setDepIncludePkgDeps True)))
1149 (Deprecated "Use -include-pkg-deps instead")
1150 , Flag "exclude-module" (HasArg (upd . addDepExcludeMod)) Supported
1151 , Flag "optdep--exclude-module" (HasArg (upd . addDepExcludeMod))
1152 (Deprecated "Use -exclude-module instead")
1153 , Flag "optdep-x" (HasArg (upd . addDepExcludeMod))
1154 (Deprecated "Use -exclude-module instead")
1156 -------- Linking ----------------------------------------------------
1157 , Flag "c" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1159 , Flag "no-link" (NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
1160 (Deprecated "Use -c instead")
1161 , Flag "shared" (NoArg (upd $ \d -> d{ ghcLink=LinkDynLib } ))
1163 , Flag "dynload" (HasArg (upd . parseDynLibLoaderMode))
1166 ------- Libraries ---------------------------------------------------
1167 , Flag "L" (Prefix addLibraryPath ) Supported
1168 , Flag "l" (AnySuffix (\s -> do upd (addOptl s))) Supported
1170 ------- Frameworks --------------------------------------------------
1171 -- -framework-path should really be -F ...
1172 , Flag "framework-path" (HasArg addFrameworkPath ) Supported
1173 , Flag "framework" (HasArg (upd . addCmdlineFramework)) Supported
1175 ------- Output Redirection ------------------------------------------
1176 , Flag "odir" (HasArg (upd . setObjectDir)) Supported
1177 , Flag "o" (SepArg (upd . setOutputFile . Just)) Supported
1178 , Flag "ohi" (HasArg (upd . setOutputHi . Just )) Supported
1179 , Flag "osuf" (HasArg (upd . setObjectSuf)) Supported
1180 , Flag "hcsuf" (HasArg (upd . setHcSuf)) Supported
1181 , Flag "hisuf" (HasArg (upd . setHiSuf)) Supported
1182 , Flag "hidir" (HasArg (upd . setHiDir)) Supported
1183 , Flag "tmpdir" (HasArg (upd . setTmpDir)) Supported
1184 , Flag "stubdir" (HasArg (upd . setStubDir)) Supported
1185 , Flag "ddump-file-prefix" (HasArg (upd . setDumpPrefixForce . Just))
1188 ------- Keeping temporary files -------------------------------------
1189 -- These can be singular (think ghc -c) or plural (think ghc --make)
1190 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1191 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles)) Supported
1192 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1193 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles)) Supported
1194 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1195 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles)) Supported
1196 -- This only makes sense as plural
1197 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles)) Supported
1199 ------- Miscellaneous ----------------------------------------------
1200 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages)) Supported
1201 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain)) Supported
1202 , Flag "main-is" (SepArg setMainIs ) Supported
1203 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock)) Supported
1204 , Flag "haddock-opts" (HasArg (upd . addHaddockOpts)) Supported
1205 , Flag "hpcdir" (SepArg setOptHpcDir) Supported
1207 ------- recompilation checker --------------------------------------
1208 , Flag "recomp" (NoArg (unSetDynFlag Opt_ForceRecomp))
1209 (Deprecated "Use -fno-force-recomp instead")
1210 , Flag "no-recomp" (NoArg (setDynFlag Opt_ForceRecomp))
1211 (Deprecated "Use -fforce-recomp instead")
1213 ------- Packages ----------------------------------------------------
1214 , Flag "package-conf" (HasArg extraPkgConf_) Supported
1215 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1217 , Flag "package-name" (HasArg (upd . setPackageName)) Supported
1218 , Flag "package" (HasArg exposePackage) Supported
1219 , Flag "hide-package" (HasArg hidePackage) Supported
1220 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1222 , Flag "ignore-package" (HasArg ignorePackage)
1224 , Flag "syslib" (HasArg exposePackage)
1225 (Deprecated "Use -package instead")
1227 ------ HsCpp opts ---------------------------------------------------
1228 , Flag "D" (AnySuffix (upd . addOptP)) Supported
1229 , Flag "U" (AnySuffix (upd . addOptP)) Supported
1231 ------- Include/Import Paths ----------------------------------------
1232 , Flag "I" (Prefix addIncludePath) Supported
1233 , Flag "i" (OptPrefix addImportPath ) Supported
1235 ------ Debugging ----------------------------------------------------
1236 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats)) Supported
1238 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1240 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1242 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1244 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1246 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1248 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1250 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1252 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1254 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1256 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1258 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1260 , Flag "ddump-asm-regalloc-stages"
1261 (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1263 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1265 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1267 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1269 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1271 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1273 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1275 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1277 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1279 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1281 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1283 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1285 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1287 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1289 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1291 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1293 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1295 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1297 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1299 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1301 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1303 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1305 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1307 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1309 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1311 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1313 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1315 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1317 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1319 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1321 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1323 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1325 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1327 , Flag "dverbose-core2core" (NoArg setVerboseCore2Core)
1329 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1331 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1333 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1335 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1337 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1339 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1341 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1343 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1345 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1348 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1350 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1352 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1354 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1356 , Flag "dshow-passes"
1357 (NoArg (do setDynFlag Opt_ForceRecomp
1358 setVerbosity (Just 2)))
1360 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1363 ------ Machine dependant (-m<blah>) stuff ---------------------------
1365 , Flag "monly-2-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
1367 , Flag "monly-3-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
1369 , Flag "monly-4-regs" (NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
1372 ------ Warning opts -------------------------------------------------
1373 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1375 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1377 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1379 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1381 , Flag "Wnot" (NoArg (mapM_ unSetDynFlag minusWallOpts))
1382 (Deprecated "Use -w instead")
1383 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1386 ------ Optimisation flags ------------------------------------------
1387 , Flag "O" (NoArg (upd (setOptLevel 1))) Supported
1388 , Flag "Onot" (NoArg (upd (setOptLevel 0)))
1389 (Deprecated "Use -O0 instead")
1390 , Flag "Odph" (NoArg (upd setDPHOpt)) Supported
1391 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1393 -- If the number is missing, use 1
1395 , Flag "fsimplifier-phases"
1396 (IntSuffix (\n -> upd (\dfs -> dfs{ simplPhases = n })))
1398 , Flag "fmax-simplifier-iterations"
1399 (IntSuffix (\n -> upd (\dfs -> dfs{ maxSimplIterations = n })))
1402 , Flag "fspec-constr-threshold"
1403 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrThreshold = Just n })))
1405 , Flag "fno-spec-constr-threshold"
1406 (NoArg (upd (\dfs -> dfs{ specConstrThreshold = Nothing })))
1408 , Flag "fspec-constr-count"
1409 (IntSuffix (\n -> upd (\dfs -> dfs{ specConstrCount = Just n })))
1411 , Flag "fno-spec-constr-count"
1412 (NoArg (upd (\dfs -> dfs{ specConstrCount = Nothing })))
1414 , Flag "fliberate-case-threshold"
1415 (IntSuffix (\n -> upd (\dfs -> dfs{ liberateCaseThreshold = Just n })))
1417 , Flag "fno-liberate-case-threshold"
1418 (NoArg (upd (\dfs -> dfs{ liberateCaseThreshold = Nothing })))
1421 , Flag "frule-check"
1422 (SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
1424 , Flag "fcontext-stack"
1425 (IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
1428 ------ DPH flags ----------------------------------------------------
1431 (NoArg (upd (setDPHBackend DPHSeq)))
1434 (NoArg (upd (setDPHBackend DPHPar)))
1437 ------ Compiler flags -----------------------------------------------
1439 , Flag "fasm" (NoArg (setObjTarget HscAsm)) Supported
1440 , Flag "fvia-c" (NoArg (setObjTarget HscC)) Supported
1441 , Flag "fvia-C" (NoArg (setObjTarget HscC)) Supported
1443 , Flag "fno-code" (NoArg (setTarget HscNothing)) Supported
1444 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted)) Supported
1445 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget)) Supported
1447 , Flag "fglasgow-exts" (NoArg (mapM_ setDynFlag glasgowExtsFlags))
1449 , Flag "fno-glasgow-exts" (NoArg (mapM_ unSetDynFlag glasgowExtsFlags))
1452 ++ map (mkFlag True "f" setDynFlag ) fFlags
1453 ++ map (mkFlag False "fno-" unSetDynFlag) fFlags
1454 ++ map (mkFlag True "X" setDynFlag ) xFlags
1455 ++ map (mkFlag False "XNo" unSetDynFlag) xFlags
1457 mkFlag :: Bool -- ^ True <=> it should be turned on
1458 -> String -- ^ The flag prefix
1459 -> (DynFlag -> DynP ())
1460 -> (String, DynFlag, Bool -> Deprecated)
1462 mkFlag turnOn flagPrefix f (name, dynflag, deprecated)
1463 = Flag (flagPrefix ++ name) (NoArg (f dynflag)) (deprecated turnOn)
1465 deprecatedForLanguage :: String -> Bool -> Deprecated
1466 deprecatedForLanguage lang turn_on
1467 = Deprecated ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ "#-} instead")
1469 flag | turn_on = lang
1470 | otherwise = "No"++lang
1472 useInstead :: String -> Bool -> Deprecated
1473 useInstead flag turn_on
1474 = Deprecated ("Use -f" ++ no ++ flag ++ " instead")
1476 no = if turn_on then "" else "no-"
1478 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1479 fFlags :: [(String, DynFlag, Bool -> Deprecated)]
1481 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, const Supported ),
1482 ( "warn-dodgy-imports", Opt_WarnDodgyImports, const Supported ),
1483 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, const Supported ),
1484 ( "warn-hi-shadowing", Opt_WarnHiShadows, const Supported ),
1485 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, const Supported ),
1486 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, const Supported ),
1487 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, const Supported ),
1488 ( "warn-missing-fields", Opt_WarnMissingFields, const Supported ),
1489 ( "warn-missing-methods", Opt_WarnMissingMethods, const Supported ),
1490 ( "warn-missing-signatures", Opt_WarnMissingSigs, const Supported ),
1491 ( "warn-name-shadowing", Opt_WarnNameShadowing, const Supported ),
1492 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, const Supported ),
1493 ( "warn-simple-patterns", Opt_WarnSimplePatterns, const Supported ),
1494 ( "warn-type-defaults", Opt_WarnTypeDefaults, const Supported ),
1495 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, const Supported ),
1496 ( "warn-unused-binds", Opt_WarnUnusedBinds, const Supported ),
1497 ( "warn-unused-imports", Opt_WarnUnusedImports, const Supported ),
1498 ( "warn-unused-matches", Opt_WarnUnusedMatches, const Supported ),
1499 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1500 ( "warn-deprecations", Opt_WarnWarningsDeprecations, const Supported ),
1501 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, const Supported ),
1502 ( "warn-orphans", Opt_WarnOrphans, const Supported ),
1503 ( "warn-tabs", Opt_WarnTabs, const Supported ),
1504 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, const Supported ),
1505 ( "print-explicit-foralls", Opt_PrintExplicitForalls, const Supported ),
1506 ( "strictness", Opt_Strictness, const Supported ),
1507 ( "static-argument-transformation", Opt_StaticArgumentTransformation, const Supported ),
1508 ( "full-laziness", Opt_FullLaziness, const Supported ),
1509 ( "liberate-case", Opt_LiberateCase, const Supported ),
1510 ( "spec-constr", Opt_SpecConstr, const Supported ),
1511 ( "cse", Opt_CSE, const Supported ),
1512 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, const Supported ),
1513 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, const Supported ),
1514 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, const Supported ),
1515 ( "ignore-asserts", Opt_IgnoreAsserts, const Supported ),
1516 ( "do-eta-reduction", Opt_DoEtaReduction, const Supported ),
1517 ( "case-merge", Opt_CaseMerge, const Supported ),
1518 ( "unbox-strict-fields", Opt_UnboxStrictFields, const Supported ),
1519 ( "method-sharing", Opt_MethodSharing, const Supported ),
1520 ( "dicts-cheap", Opt_DictsCheap, const Supported ),
1521 ( "excess-precision", Opt_ExcessPrecision, const Supported ),
1522 ( "asm-mangling", Opt_DoAsmMangling, const Supported ),
1523 ( "print-bind-result", Opt_PrintBindResult, const Supported ),
1524 ( "force-recomp", Opt_ForceRecomp, const Supported ),
1525 ( "hpc-no-auto", Opt_Hpc_No_Auto, const Supported ),
1526 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1527 ( "enable-rewrite-rules", Opt_EnableRewriteRules, const Supported ),
1528 ( "break-on-exception", Opt_BreakOnException, const Supported ),
1529 ( "break-on-error", Opt_BreakOnError, const Supported ),
1530 ( "print-evld-with-show", Opt_PrintEvldWithShow, const Supported ),
1531 ( "print-bind-contents", Opt_PrintBindContents, const Supported ),
1532 ( "run-cps", Opt_RunCPSZ, const Supported ),
1533 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, const Supported ),
1534 ( "vectorise", Opt_Vectorise, const Supported ),
1535 ( "regs-graph", Opt_RegsGraph, const Supported ),
1536 ( "regs-iterative", Opt_RegsIterative, const Supported ),
1537 ( "th", Opt_TemplateHaskell,
1538 deprecatedForLanguage "TemplateHaskell" ),
1539 ( "fi", Opt_ForeignFunctionInterface,
1540 deprecatedForLanguage "ForeignFunctionInterface" ),
1541 ( "ffi", Opt_ForeignFunctionInterface,
1542 deprecatedForLanguage "ForeignFunctionInterface" ),
1543 ( "arrows", Opt_Arrows,
1544 deprecatedForLanguage "Arrows" ),
1545 ( "generics", Opt_Generics,
1546 deprecatedForLanguage "Generics" ),
1547 ( "implicit-prelude", Opt_ImplicitPrelude,
1548 deprecatedForLanguage "ImplicitPrelude" ),
1549 ( "bang-patterns", Opt_BangPatterns,
1550 deprecatedForLanguage "BangPatterns" ),
1551 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1552 deprecatedForLanguage "MonomorphismRestriction" ),
1553 ( "mono-pat-binds", Opt_MonoPatBinds,
1554 deprecatedForLanguage "MonoPatBinds" ),
1555 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1556 deprecatedForLanguage "ExtendedDefaultRules" ),
1557 ( "implicit-params", Opt_ImplicitParams,
1558 deprecatedForLanguage "ImplicitParams" ),
1559 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1560 deprecatedForLanguage "ScopedTypeVariables" ),
1562 deprecatedForLanguage "PArr" ),
1563 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1564 deprecatedForLanguage "OverlappingInstances" ),
1565 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1566 deprecatedForLanguage "UndecidableInstances" ),
1567 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1568 deprecatedForLanguage "IncoherentInstances" ),
1569 ( "gen-manifest", Opt_GenManifest, const Supported ),
1570 ( "embed-manifest", Opt_EmbedManifest, const Supported ),
1571 ( "implicit-import-qualified", Opt_ImplicitImportQualified, const Supported )
1574 supportedLanguages :: [String]
1575 supportedLanguages = [ name | (name, _, _) <- xFlags ]
1577 -- This may contain duplicates
1578 languageOptions :: [DynFlag]
1579 languageOptions = [ dynFlag | (_, dynFlag, _) <- xFlags ]
1581 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1582 xFlags :: [(String, DynFlag, Bool -> Deprecated)]
1584 ( "CPP", Opt_Cpp, const Supported ),
1585 ( "PostfixOperators", Opt_PostfixOperators, const Supported ),
1586 ( "PatternGuards", Opt_PatternGuards, const Supported ),
1587 ( "UnicodeSyntax", Opt_UnicodeSyntax, const Supported ),
1588 ( "MagicHash", Opt_MagicHash, const Supported ),
1589 ( "PolymorphicComponents", Opt_PolymorphicComponents, const Supported ),
1590 ( "ExistentialQuantification", Opt_ExistentialQuantification, const Supported ),
1591 ( "KindSignatures", Opt_KindSignatures, const Supported ),
1592 ( "EmptyDataDecls", Opt_EmptyDataDecls, const Supported ),
1593 ( "ParallelListComp", Opt_ParallelListComp, const Supported ),
1594 ( "TransformListComp", Opt_TransformListComp, const Supported ),
1595 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, const Supported ),
1596 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, const Supported ),
1597 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, const Supported ),
1598 ( "Rank2Types", Opt_Rank2Types, const Supported ),
1599 ( "RankNTypes", Opt_RankNTypes, const Supported ),
1600 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, const Supported ),
1601 ( "TypeOperators", Opt_TypeOperators, const Supported ),
1602 ( "RecursiveDo", Opt_RecursiveDo, const Supported ),
1603 ( "Arrows", Opt_Arrows, const Supported ),
1604 ( "PArr", Opt_PArr, const Supported ),
1605 ( "TemplateHaskell", Opt_TemplateHaskell, const Supported ),
1606 ( "QuasiQuotes", Opt_QuasiQuotes, const Supported ),
1607 ( "Generics", Opt_Generics, const Supported ),
1609 ( "ImplicitPrelude", Opt_ImplicitPrelude, const Supported ),
1610 ( "RecordWildCards", Opt_RecordWildCards, const Supported ),
1611 ( "NamedFieldPuns", Opt_RecordPuns, const Supported ),
1612 ( "RecordPuns", Opt_RecordPuns,
1613 deprecatedForLanguage "NamedFieldPuns" ),
1614 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, const Supported ),
1615 ( "OverloadedStrings", Opt_OverloadedStrings, const Supported ),
1616 ( "GADTs", Opt_GADTs, const Supported ),
1617 ( "ViewPatterns", Opt_ViewPatterns, const Supported ),
1618 ( "TypeFamilies", Opt_TypeFamilies, const Supported ),
1619 ( "BangPatterns", Opt_BangPatterns, const Supported ),
1621 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, const Supported ),
1622 -- On by default (which is not strictly H98):
1623 ( "MonoPatBinds", Opt_MonoPatBinds, const Supported ),
1624 ( "RelaxedPolyRec", Opt_RelaxedPolyRec, const Supported ),
1625 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, const Supported ),
1626 ( "ImplicitParams", Opt_ImplicitParams, const Supported ),
1627 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, const Supported ),
1629 ( "PatternSignatures", Opt_ScopedTypeVariables,
1630 deprecatedForLanguage "ScopedTypeVariables" ),
1632 ( "UnboxedTuples", Opt_UnboxedTuples, const Supported ),
1633 ( "StandaloneDeriving", Opt_StandaloneDeriving, const Supported ),
1634 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, const Supported ),
1635 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, const Supported ),
1636 ( "FlexibleContexts", Opt_FlexibleContexts, const Supported ),
1637 ( "FlexibleInstances", Opt_FlexibleInstances, const Supported ),
1638 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, const Supported ),
1639 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, const Supported ),
1640 ( "FunctionalDependencies", Opt_FunctionalDependencies, const Supported ),
1641 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, const Supported ),
1642 ( "OverlappingInstances", Opt_OverlappingInstances, const Supported ),
1643 ( "UndecidableInstances", Opt_UndecidableInstances, const Supported ),
1644 ( "IncoherentInstances", Opt_IncoherentInstances, const Supported ),
1645 ( "PackageImports", Opt_PackageImports, const Supported )
1648 impliedFlags :: [(DynFlag, [DynFlag])]
1650 ( Opt_GADTs, [Opt_RelaxedPolyRec] ) -- We want type-sig variables to
1651 -- be completely rigid for GADTs
1652 , ( Opt_ScopedTypeVariables, [Opt_RelaxedPolyRec] ) -- Ditto for scoped type variables; see
1653 -- Note [Scoped tyvars] in TcBinds
1656 glasgowExtsFlags :: [DynFlag]
1657 glasgowExtsFlags = [
1658 Opt_PrintExplicitForalls
1659 , Opt_ForeignFunctionInterface
1660 , Opt_UnliftedFFITypes
1662 , Opt_ImplicitParams
1663 , Opt_ScopedTypeVariables
1665 , Opt_TypeSynonymInstances
1666 , Opt_StandaloneDeriving
1667 , Opt_DeriveDataTypeable
1668 , Opt_FlexibleContexts
1669 , Opt_FlexibleInstances
1670 , Opt_ConstrainedClassMethods
1671 , Opt_MultiParamTypeClasses
1672 , Opt_FunctionalDependencies
1674 , Opt_PolymorphicComponents
1675 , Opt_ExistentialQuantification
1677 , Opt_PostfixOperators
1679 , Opt_LiberalTypeSynonyms
1681 , Opt_ImpredicativeTypes
1684 , Opt_ParallelListComp
1685 , Opt_EmptyDataDecls
1686 , Opt_KindSignatures
1687 , Opt_GeneralizedNewtypeDeriving
1688 , Opt_TypeFamilies ]
1690 -- -----------------------------------------------------------------------------
1691 -- Parsing the dynamic flags.
1693 parseDynamicFlags :: DynFlags -> [Located String]
1694 -> IO (DynFlags, [Located String], [Located String])
1695 parseDynamicFlags dflags args = do
1696 -- XXX Legacy support code
1697 -- We used to accept things like
1698 -- optdep-f -optdepdepend
1699 -- optdep-f -optdep depend
1700 -- optdep -f -optdepdepend
1701 -- optdep -f -optdep depend
1702 -- but the spaces trip up proper argument handling. So get rid of them.
1703 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1704 f (x : xs) = x : f xs
1707 let ((leftover, errs, warns), dflags')
1708 = runCmdLine (processArgs dynamic_flags args') dflags
1709 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1710 return (dflags', leftover, warns)
1712 type DynP = CmdLineP DynFlags
1714 upd :: (DynFlags -> DynFlags) -> DynP ()
1716 dfs <- getCmdLineState
1717 putCmdLineState $! (f dfs)
1719 --------------------------
1720 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1721 setDynFlag f = upd (\dfs -> foldl dopt_set (dopt_set dfs f) deps)
1723 deps = [ d | (f', ds) <- impliedFlags, f' == f, d <- ds ]
1724 -- When you set f, set the ones it implies
1725 -- When you un-set f, however, we don't un-set the things it implies
1726 -- (except for -fno-glasgow-exts, which is treated specially)
1728 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1730 --------------------------
1731 setDumpFlag :: DynFlag -> OptKind DynP
1732 setDumpFlag dump_flag
1733 | force_recomp = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1734 | otherwise = NoArg (setDynFlag dump_flag)
1736 -- Whenver we -ddump, switch off the recompilation checker,
1737 -- else you don't see the dump!
1738 -- However, certain dumpy-things are really interested in what's going
1739 -- on during recompilation checking, so in those cases we
1740 -- don't want to turn it off.
1741 force_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1742 Opt_D_dump_hi_diffs]
1744 setVerboseCore2Core :: DynP ()
1745 setVerboseCore2Core = do setDynFlag Opt_ForceRecomp
1746 setDynFlag Opt_D_verbose_core2core
1747 upd (\s -> s { shouldDumpSimplPhase = const True })
1749 setDumpSimplPhases :: String -> DynP ()
1750 setDumpSimplPhases s = do setDynFlag Opt_ForceRecomp
1751 upd (\s -> s { shouldDumpSimplPhase = spec })
1753 spec :: SimplifierMode -> Bool
1755 . map (join (&&) . map match . split ':')
1761 join :: (Bool -> Bool -> Bool)
1762 -> [SimplifierMode -> Bool]
1763 -> SimplifierMode -> Bool
1764 join _ [] = const True
1765 join op ss = foldr1 (\f g x -> f x `op` g x) ss
1767 match :: String -> SimplifierMode -> Bool
1768 match "" = const True
1769 match s = case reads s of
1770 [(n,"")] -> phase_num n
1773 phase_num :: Int -> SimplifierMode -> Bool
1774 phase_num n (SimplPhase k _) = n == k
1775 phase_num _ _ = False
1777 phase_name :: String -> SimplifierMode -> Bool
1778 phase_name s SimplGently = s == "gentle"
1779 phase_name s (SimplPhase _ ss) = s `elem` ss
1781 setVerbosity :: Maybe Int -> DynP ()
1782 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1784 addCmdlineHCInclude :: String -> DynP ()
1785 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1787 extraPkgConf_ :: FilePath -> DynP ()
1788 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1790 exposePackage, hidePackage, ignorePackage :: String -> DynP ()
1792 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1794 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1796 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1798 setPackageName :: String -> DynFlags -> DynFlags
1800 | Nothing <- unpackPackageId pid
1801 = ghcError (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1803 = \s -> s{ thisPackage = pid }
1805 pid = stringToPackageId p
1807 -- If we're linking a binary, then only targets that produce object
1808 -- code are allowed (requests for other target types are ignored).
1809 setTarget :: HscTarget -> DynP ()
1810 setTarget l = upd set
1813 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1816 -- Changes the target only if we're compiling object code. This is
1817 -- used by -fasm and -fvia-C, which switch from one to the other, but
1818 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1819 -- can be safely used in an OPTIONS_GHC pragma.
1820 setObjTarget :: HscTarget -> DynP ()
1821 setObjTarget l = upd set
1824 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1827 setOptLevel :: Int -> DynFlags -> DynFlags
1828 setOptLevel n dflags
1829 | hscTarget dflags == HscInterpreted && n > 0
1831 -- not in IO any more, oh well:
1832 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1834 = updOptLevel n dflags
1837 -- -Odph is equivalent to
1839 -- -O2 optimise as much as possible
1840 -- -fno-method-sharing sharing specialisation defeats fusion
1842 -- -fdicts-cheap always inline dictionaries
1843 -- -fmax-simplifier-iterations20 this is necessary sometimes
1844 -- -fno-spec-constr-threshold run SpecConstr even for big loops
1846 setDPHOpt :: DynFlags -> DynFlags
1847 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1848 , specConstrThreshold = Nothing
1850 `dopt_set` Opt_DictsCheap
1851 `dopt_unset` Opt_MethodSharing
1853 data DPHBackend = DPHPar
1856 setDPHBackend :: DPHBackend -> DynFlags -> DynFlags
1857 setDPHBackend backend dflags = dflags { dphBackend = backend }
1860 setMainIs :: String -> DynP ()
1862 | not (null main_fn) && isLower (head main_fn)
1863 -- The arg looked like "Foo.Bar.baz"
1864 = upd $ \d -> d{ mainFunIs = Just main_fn,
1865 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1867 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
1868 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
1870 | otherwise -- The arg looked like "baz"
1871 = upd $ \d -> d{ mainFunIs = Just arg }
1873 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1875 -- | Get the unqualified name of the function to use as the \"main\" for the main module.
1876 -- Either returns the default name or the one configured on the command line with -main-is
1877 getMainFun :: DynFlags -> RdrName
1878 getMainFun dflags = case (mainFunIs dflags) of
1879 Just fn -> mkRdrUnqual (mkVarOccFS (mkFastString fn))
1880 Nothing -> main_RDR_Unqual
1882 -----------------------------------------------------------------------------
1883 -- Paths & Libraries
1885 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
1887 -- -i on its own deletes the import paths
1888 addImportPath "" = upd (\s -> s{importPaths = []})
1889 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1893 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1896 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1898 addFrameworkPath p =
1899 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1901 #ifndef mingw32_TARGET_OS
1902 split_marker :: Char
1903 split_marker = ':' -- not configurable (ToDo)
1906 splitPathList :: String -> [String]
1907 splitPathList s = filter notNull (splitUp s)
1908 -- empty paths are ignored: there might be a trailing
1909 -- ':' in the initial list, for example. Empty paths can
1910 -- cause confusion when they are translated into -I options
1911 -- for passing to gcc.
1913 #ifndef mingw32_TARGET_OS
1914 splitUp xs = split split_marker xs
1916 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1918 -- That is, if "foo:bar:baz" is used, this interpreted as
1919 -- consisting of three entries, 'foo', 'bar', 'baz'.
1920 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1921 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1923 -- Notice that no attempt is made to fully replace the 'standard'
1924 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1925 -- that this will cause too much breakage for users & ':' will
1926 -- work fine even with DOS paths, if you're not insisting on being silly.
1929 splitUp (x:':':div:xs) | div `elem` dir_markers
1930 = ((x:':':div:p): splitUp rs)
1932 (p,rs) = findNextPath xs
1933 -- we used to check for existence of the path here, but that
1934 -- required the IO monad to be threaded through the command-line
1935 -- parser which is quite inconvenient. The
1936 splitUp xs = cons p (splitUp rs)
1938 (p,rs) = findNextPath xs
1943 -- will be called either when we've consumed nought or the
1944 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1945 -- finding the next split marker.
1947 case break (`elem` split_markers) xs of
1948 (p, _:ds) -> (p, ds)
1951 split_markers :: [Char]
1952 split_markers = [':', ';']
1954 dir_markers :: [Char]
1955 dir_markers = ['/', '\\']
1958 -- -----------------------------------------------------------------------------
1959 -- tmpDir, where we store temporary files.
1961 setTmpDir :: FilePath -> DynFlags -> DynFlags
1962 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
1963 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
1964 -- seem necessary now --SDM 7/2/2008
1966 -----------------------------------------------------------------------------
1969 setOptHpcDir :: String -> DynP ()
1970 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1972 -----------------------------------------------------------------------------
1973 -- Via-C compilation stuff
1975 -- There are some options that we need to pass to gcc when compiling
1976 -- Haskell code via C, but are only supported by recent versions of
1977 -- gcc. The configure script decides which of these options we need,
1978 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
1979 -- read before each via-C compilation. The advantage of having these
1980 -- in a separate file is that the file can be created at install-time
1981 -- depending on the available gcc version, and even re-generated later
1982 -- if gcc is upgraded.
1984 -- The options below are not dependent on the version of gcc, only the
1987 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1988 [String]) -- for registerised HC compilations
1989 machdepCCOpts _dflags
1990 #if alpha_TARGET_ARCH
1992 #ifdef HAVE_THREADED_RTS_SUPPORT
1996 -- For now, to suppress the gcc warning "call-clobbered
1997 -- register used for global register variable", we simply
1998 -- disable all warnings altogether using the -w flag. Oh well.
2000 #elif hppa_TARGET_ARCH
2001 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2002 -- (very nice, but too bad the HP /usr/include files don't agree.)
2003 = ( ["-D_HPUX_SOURCE"], [] )
2005 #elif m68k_TARGET_ARCH
2006 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2007 -- popping of args to routines to be explicit; if we let things
2008 -- be deferred 'til after an STGJUMP, imminent death is certain!
2010 -- -fomit-frame-pointer : *don't*
2011 -- It's better to have a6 completely tied up being a frame pointer
2012 -- rather than let GCC pick random things to do with it.
2013 -- (If we want to steal a6, then we would try to do things
2014 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2015 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2017 #elif i386_TARGET_ARCH
2018 -- -fno-defer-pop : basically the same game as for m68k
2020 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2021 -- the fp (%ebp) for our register maps.
2022 = let n_regs = stolen_x86_regs _dflags
2025 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2028 "-fomit-frame-pointer",
2029 -- we want -fno-builtin, because when gcc inlines
2030 -- built-in functions like memcpy() it tends to
2031 -- run out of registers, requiring -monly-n-regs
2033 "-DSTOLEN_X86_REGS="++show n_regs ]
2036 #elif ia64_TARGET_ARCH
2037 = ( [], ["-fomit-frame-pointer", "-G0"] )
2039 #elif x86_64_TARGET_ARCH
2040 = ( [], ["-fomit-frame-pointer",
2041 "-fno-asynchronous-unwind-tables",
2042 -- the unwind tables are unnecessary for HC code,
2043 -- and get in the way of -split-objs. Another option
2044 -- would be to throw them away in the mangler, but this
2047 -- calling builtins like strlen() using the FFI can
2048 -- cause gcc to run out of regs, so use the external
2052 #elif sparc_TARGET_ARCH
2054 -- For now, to suppress the gcc warning "call-clobbered
2055 -- register used for global register variable", we simply
2056 -- disable all warnings altogether using the -w flag. Oh well.
2058 #elif powerpc_apple_darwin_TARGET
2060 -- Disable Apple's precompiling preprocessor. It's a great thing
2061 -- for "normal" programs, but it doesn't support register variable
2063 = ( [], ["-no-cpp-precomp"] )
2068 picCCOpts :: DynFlags -> [String]
2070 #if darwin_TARGET_OS
2071 -- Apple prefers to do things the other way round.
2072 -- PIC is on by default.
2073 -- -mdynamic-no-pic:
2074 -- Turn off PIC code generation.
2076 -- Don't generate "common" symbols - these are unwanted
2077 -- in dynamic libraries.
2080 = ["-fno-common", "-D__PIC__"]
2082 = ["-mdynamic-no-pic"]
2083 #elif mingw32_TARGET_OS
2084 -- no -fPIC for Windows
2091 = ["-fPIC", "-D__PIC__"]
2096 -- -----------------------------------------------------------------------------
2100 can_split = cSplitObjs == "YES"
2102 -- -----------------------------------------------------------------------------
2105 compilerInfo :: [(String, String)]
2106 compilerInfo = [("Project name", cProjectName),
2107 ("Project version", cProjectVersion),
2108 ("Booter version", cBooterVersion),
2110 ("Interface file version", cHscIfaceFileVersion),
2111 ("Have interpreter", cGhcWithInterpreter),
2112 ("Object splitting", cSplitObjs),
2113 ("Have native code generator", cGhcWithNativeCodeGen),
2114 ("Support SMP", cGhcWithSMP),
2115 ("Unregisterised", cGhcUnregisterised),
2116 ("Tables next to code", cGhcEnableTablesNextToCode),
2117 ("Win32 DLLs", cEnableWin32DLLs),
2118 ("RTS ways", cGhcRTSWays),
2119 ("Leading underscore", cLeadingUnderscore),
2120 ("Debug on", show debugIsOn)