2 -- Temporary, until rtsIsProfiled is fixed
8 -- (c) The University of Glasgow 2005
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
28 HscTarget(..), isObjectTarget, defaultObjectTarget,
29 GhcMode(..), isOneShot,
30 GhcLink(..), isNoLink,
34 fFlags, fLangFlags, xFlags,
35 DPHBackend(..), dphPackage,
38 -- ** Manipulating DynFlags
39 defaultDynFlags, -- DynFlags
40 initDynFlags, -- DynFlags -> IO DynFlags
42 getOpts, -- DynFlags -> (DynFlags -> [a]) -> [a]
49 -- ** Parsing DynFlags
51 parseDynamicNoPackageFlags,
54 supportedLanguagesAndExtensions,
56 -- ** DynFlag C compiler options
57 machdepCCOpts, picCCOpts,
59 -- * Configuration of the stg-to-stg passes
63 -- * Compiler configuration suitable for display to the user
67 -- Only in stage 2 can we be sure that the RTS
68 -- exposes the appropriate runtime boolean
73 #include "HsVersions.h"
75 #ifndef OMIT_NATIVE_CODEGEN
80 import PrelNames ( mAIN )
82 import {-# SOURCE #-} Packages (PackageState)
83 import DriverPhases ( Phase(..), phaseInputExt )
86 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
89 import Maybes ( orElse )
93 import Foreign.C ( CInt )
94 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
96 import System.IO.Unsafe ( unsafePerformIO )
98 import Control.Monad ( when )
102 import Data.Map (Map)
103 import qualified Data.Map as Map
104 import System.FilePath
105 import System.IO ( stderr, hPutChar )
107 -- -----------------------------------------------------------------------------
110 -- | Enumerates the simple on-or-off dynamic flags
116 | Opt_D_dump_cmmz_pretty
120 | Opt_D_dump_asm_native
121 | Opt_D_dump_asm_liveness
122 | Opt_D_dump_asm_coalesce
123 | Opt_D_dump_asm_regalloc
124 | Opt_D_dump_asm_regalloc_stages
125 | Opt_D_dump_asm_conflicts
126 | Opt_D_dump_asm_stats
127 | Opt_D_dump_asm_expanded
134 | Opt_D_dump_inlinings
135 | Opt_D_dump_rule_firings
136 | Opt_D_dump_rule_rewrites
137 | Opt_D_dump_occur_anal
141 | Opt_D_dump_simpl_iterations
142 | Opt_D_dump_simpl_phases
151 | Opt_D_dump_worker_wrapper
152 | Opt_D_dump_rn_trace
153 | Opt_D_dump_rn_stats
155 | Opt_D_dump_simpl_stats
156 | Opt_D_dump_tc_trace
157 | Opt_D_dump_if_trace
164 | Opt_D_verbose_core2core
165 | Opt_D_verbose_stg2stg
167 | Opt_D_dump_hi_diffs
168 | Opt_D_dump_minimal_imports
169 | Opt_D_dump_mod_cycles
170 | Opt_D_dump_view_pattern_commoning
171 | Opt_D_faststring_stats
172 | Opt_DumpToFile -- ^ Append dump output to files instead of stdout.
173 | Opt_D_no_debug_output
179 | Opt_WarnIsError -- -Werror; makes warnings fatal
180 | Opt_WarnDuplicateExports
182 | Opt_WarnImplicitPrelude
183 | Opt_WarnIncompletePatterns
184 | Opt_WarnIncompleteUniPatterns
185 | Opt_WarnIncompletePatternsRecUpd
186 | Opt_WarnMissingFields
187 | Opt_WarnMissingImportList
188 | Opt_WarnMissingMethods
189 | Opt_WarnMissingSigs
190 | Opt_WarnMissingLocalSigs
191 | Opt_WarnNameShadowing
192 | Opt_WarnOverlappingPatterns
193 | Opt_WarnTypeDefaults
194 | Opt_WarnMonomorphism
195 | Opt_WarnUnusedBinds
196 | Opt_WarnUnusedImports
197 | Opt_WarnUnusedMatches
198 | Opt_WarnWarningsDeprecations
199 | Opt_WarnDeprecatedFlags
200 | Opt_WarnDodgyExports
201 | Opt_WarnDodgyImports
203 | Opt_WarnAutoOrphans
206 | Opt_WarnUnrecognisedPragmas
207 | Opt_WarnDodgyForeignImports
208 | Opt_WarnLazyUnliftedBindings
209 | Opt_WarnUnusedDoBind
210 | Opt_WarnWrongDoBind
211 | Opt_WarnAlternativeLayoutRuleTransitional
213 | Opt_PrintExplicitForalls
220 | Opt_StaticArgumentTransformation
224 | Opt_DoLambdaEtaExpansion
228 | Opt_UnboxStrictFields
229 | Opt_MethodSharing -- Now a no-op; remove in GHC 7.2
231 | Opt_EnableRewriteRules -- Apply rewrite rules during simplification
233 | Opt_RegsGraph -- do graph coloring register allocation
234 | Opt_RegsIterative -- do iterative coalescing graph coloring register allocation
237 | Opt_IgnoreInterfacePragmas
238 | Opt_OmitInterfacePragmas
239 | Opt_ExposeAllUnfoldings
242 | Opt_AutoSccsOnAllToplevs
243 | Opt_AutoSccsOnExportedToplevs
244 | Opt_AutoSccsOnIndividualCafs
251 | Opt_ExcessPrecision
252 | Opt_EagerBlackHoling
253 | Opt_ReadUserPackageConf
257 | Opt_HideAllPackages
258 | Opt_PrintBindResult
262 | Opt_BreakOnException
264 | Opt_PrintEvldWithShow
265 | Opt_PrintBindContents
268 | Opt_EmitExternalCore
270 | Opt_BuildingCabalPackage
278 | Opt_ConvertToZipCfgAndBack
279 | Opt_AutoLinkPackages
280 | Opt_ImplicitImportQualified
289 | Opt_KeepRawTokenStream
294 data Language = Haskell98 | Haskell2010
298 | Opt_OverlappingInstances
299 | Opt_UndecidableInstances
300 | Opt_IncoherentInstances
301 | Opt_MonomorphismRestriction
304 | Opt_RelaxedPolyRec -- Deprecated
305 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
306 | Opt_ForeignFunctionInterface
307 | Opt_UnliftedFFITypes
308 | Opt_GHCForeignImportPrim
309 | Opt_ParallelArrays -- Syntactic support for parallel arrays
310 | Opt_Arrows -- Arrow-notation syntax
311 | Opt_TemplateHaskell
314 | Opt_Generics -- "Derivable type classes"
315 | Opt_ImplicitPrelude
316 | Opt_ScopedTypeVariables
320 | Opt_OverloadedStrings
321 | Opt_DisambiguateRecordFields
322 | Opt_RecordWildCards
328 | Opt_DoAndIfThenElse
329 | Opt_RebindableSyntax
331 | Opt_StandaloneDeriving
332 | Opt_DeriveDataTypeable
334 | Opt_DeriveTraversable
337 | Opt_TypeSynonymInstances
338 | Opt_FlexibleContexts
339 | Opt_FlexibleInstances
340 | Opt_ConstrainedClassMethods
341 | Opt_MultiParamTypeClasses
342 | Opt_FunctionalDependencies
344 | Opt_PolymorphicComponents
345 | Opt_ExistentialQuantification
349 | Opt_ParallelListComp
350 | Opt_TransformListComp
351 | Opt_GeneralizedNewtypeDeriving
354 | Opt_PostfixOperators
357 | Opt_LiberalTypeSynonyms
360 | Opt_ImpredicativeTypes
364 | Opt_AlternativeLayoutRule
365 | Opt_AlternativeLayoutRuleTransitional
366 | Opt_DatatypeContexts
367 | Opt_NondecreasingIndentation
371 -- | Contains not only a collection of 'DynFlag's but also a plethora of
372 -- information relating to the compilation of a single file or GHC session
373 data DynFlags = DynFlags {
376 hscTarget :: HscTarget,
377 hscOutName :: String, -- ^ Name of the output file
378 extCoreName :: String, -- ^ Name of the .hcr output file
379 verbosity :: Int, -- ^ Verbosity level: see Note [Verbosity levels]
380 optLevel :: Int, -- ^ Optimisation level
381 simplPhases :: Int, -- ^ Number of simplifier phases
382 maxSimplIterations :: Int, -- ^ Max simplifier iterations
383 shouldDumpSimplPhase :: Maybe String,
384 ruleCheck :: Maybe String,
385 strictnessBefore :: [Int], -- ^ Additional demand analysis
387 specConstrThreshold :: Maybe Int, -- ^ Threshold for SpecConstr
388 specConstrCount :: Maybe Int, -- ^ Max number of specialisations for any one function
389 liberateCaseThreshold :: Maybe Int, -- ^ Threshold for LiberateCase
390 floatLamArgs :: Maybe Int, -- ^ Arg count for lambda floating
391 -- See CoreMonad.FloatOutSwitches
393 #ifndef OMIT_NATIVE_CODEGEN
394 targetPlatform :: Platform, -- ^ The platform we're compiling for. Used by the NCG.
396 stolen_x86_regs :: Int,
397 cmdlineHcIncludes :: [String], -- ^ @\-\#includes@
398 importPaths :: [FilePath],
400 mainFunIs :: Maybe String,
401 ctxtStkDepth :: Int, -- ^ Typechecker context stack depth
403 dphBackend :: DPHBackend,
405 thisPackage :: PackageId, -- ^ name of package currently being compiled
408 ways :: [Way], -- ^ Way flags from the command line
409 buildTag :: String, -- ^ The global \"way\" (e.g. \"p\" for prof)
410 rtsBuildTag :: String, -- ^ The RTS \"way\"
412 -- For object splitting
413 splitInfo :: Maybe (String,Int),
416 objectDir :: Maybe String,
417 dylibInstallName :: Maybe String,
418 hiDir :: Maybe String,
419 stubDir :: Maybe String,
425 outputFile :: Maybe String,
426 outputHi :: Maybe String,
427 dynLibLoader :: DynLibLoader,
429 -- | This is set by 'DriverPipeline.runPipeline' based on where
430 -- its output is going.
431 dumpPrefix :: Maybe FilePath,
433 -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
434 -- Set by @-ddump-file-prefix@
435 dumpPrefixForce :: Maybe FilePath,
437 includePaths :: [String],
438 libraryPaths :: [String],
439 frameworkPaths :: [String], -- used on darwin only
440 cmdlineFrameworks :: [String], -- ditto
441 tmpDir :: String, -- no trailing '/'
443 ghcUsagePath :: FilePath, -- Filled in by SysTools
444 ghciUsagePath :: FilePath, -- ditto
445 rtsOpts :: Maybe String,
446 rtsOptsEnabled :: RtsOptsEnabled,
448 hpcDir :: String, -- ^ Path to store the .mix files
450 -- options for particular phases
458 opt_windres :: [String],
459 opt_lo :: [String], -- LLVM: llvm optimiser
460 opt_lc :: [String], -- LLVM: llc static compiler
462 -- commands for particular phases
464 pgm_P :: (String,[Option]),
466 pgm_c :: (String,[Option]),
467 pgm_m :: (String,[Option]),
468 pgm_s :: (String,[Option]),
469 pgm_a :: (String,[Option]),
470 pgm_l :: (String,[Option]),
471 pgm_dll :: (String,[Option]),
473 pgm_sysman :: String,
474 pgm_windres :: String,
475 pgm_lo :: (String,[Option]), -- LLVM: opt llvm optimiser
476 pgm_lc :: (String,[Option]), -- LLVM: llc static compiler
479 depMakefile :: FilePath,
480 depIncludePkgDeps :: Bool,
481 depExcludeMods :: [ModuleName],
482 depSuffixes :: [String],
485 extraPkgConfs :: [FilePath],
486 topDir :: FilePath, -- filled in by SysTools
487 systemPackageConfig :: FilePath, -- ditto
488 -- ^ The @-package-conf@ flags given on the command line, in the order
491 packageFlags :: [PackageFlag],
492 -- ^ The @-package@ and @-hide-package@ flags from the command-line
495 -- NB. do not modify this field, it is calculated by
496 -- Packages.initPackages and Packages.updatePackages.
497 pkgDatabase :: Maybe [PackageConfig],
498 pkgState :: PackageState,
501 -- These have to be IORefs, because the defaultCleanupHandler needs to
502 -- know what to clean when an exception happens
503 filesToClean :: IORef [FilePath],
504 dirsToClean :: IORef (Map FilePath FilePath),
508 -- Don't change this without updating extensionFlags:
509 language :: Maybe Language,
510 -- Don't change this without updating extensionFlags:
511 extensions :: [OnOff ExtensionFlag],
512 -- extensionFlags should always be equal to
513 -- flattenExtensionFlags language extensions
514 extensionFlags :: [ExtensionFlag],
516 -- | Message output action: use "ErrUtils" instead of this if you can
517 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO (),
519 haddockOptions :: Maybe String
522 wayNames :: DynFlags -> [WayName]
523 wayNames = map wayName . ways
525 -- | The target code type of the compilation (if any).
527 -- Whenever you change the target, also make sure to set 'ghcLink' to
528 -- something sensible.
530 -- 'HscNothing' can be used to avoid generating any output, however, note
533 -- * This will not run the desugaring step, thus no warnings generated in
534 -- this step will be output. In particular, this includes warnings related
535 -- to pattern matching. You can run the desugarer manually using
536 -- 'GHC.desugarModule'.
538 -- * If a program uses Template Haskell the typechecker may try to run code
539 -- from an imported module. This will fail if no code has been generated
540 -- for this module. You can use 'GHC.needsTemplateHaskell' to detect
541 -- whether this might be the case and choose to either switch to a
542 -- different target or avoid typechecking such modules. (The latter may
543 -- preferable for security reasons.)
546 = HscC -- ^ Generate C code.
547 | HscAsm -- ^ Generate assembly using the native code generator.
548 | HscLlvm -- ^ Generate assembly using the llvm code generator.
549 | HscJava -- ^ Generate Java bytecode.
550 | HscInterpreted -- ^ Generate bytecode. (Requires 'LinkInMemory')
551 | HscNothing -- ^ Don't generate any code. See notes above.
554 -- | Will this target result in an object file on the disk?
555 isObjectTarget :: HscTarget -> Bool
556 isObjectTarget HscC = True
557 isObjectTarget HscAsm = True
558 isObjectTarget HscLlvm = True
559 isObjectTarget _ = False
561 -- | The 'GhcMode' tells us whether we're doing multi-module
562 -- compilation (controlled via the "GHC" API) or one-shot
563 -- (single-module) compilation. This makes a difference primarily to
564 -- the "Finder": in one-shot mode we look for interface files for
565 -- imported modules, but in multi-module mode we look for source files
566 -- in order to check whether they need to be recompiled.
568 = CompManager -- ^ @\-\-make@, GHCi, etc.
569 | OneShot -- ^ @ghc -c Foo.hs@
570 | MkDepend -- ^ @ghc -M@, see "Finder" for why we need this
573 instance Outputable GhcMode where
574 ppr CompManager = ptext (sLit "CompManager")
575 ppr OneShot = ptext (sLit "OneShot")
576 ppr MkDepend = ptext (sLit "MkDepend")
578 isOneShot :: GhcMode -> Bool
579 isOneShot OneShot = True
580 isOneShot _other = False
582 -- | What to do in the link step, if there is one.
584 = NoLink -- ^ Don't link at all
585 | LinkBinary -- ^ Link object code into a binary
586 | LinkInMemory -- ^ Use the in-memory dynamic linker (works for both
587 -- bytecode and object code).
588 | LinkDynLib -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
591 isNoLink :: GhcLink -> Bool
592 isNoLink NoLink = True
595 -- Is it worth evaluating this Bool and caching it in the DynFlags value
596 -- during initDynFlags?
597 doingTickyProfiling :: DynFlags -> Bool
598 doingTickyProfiling _ = opt_Ticky
599 -- XXX -ticky is a static flag, because it implies -debug which is also
600 -- static. If the way flags were made dynamic, we could fix this.
603 = ExposePackage String
604 | ExposePackageId String
606 | IgnorePackage String
609 defaultHscTarget :: HscTarget
610 defaultHscTarget = defaultObjectTarget
612 -- | The 'HscTarget' value corresponding to the default way to create
613 -- object files on the current platform.
614 defaultObjectTarget :: HscTarget
616 | cGhcWithNativeCodeGen == "YES" = HscAsm
624 data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
626 -- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
627 initDynFlags :: DynFlags -> IO DynFlags
628 initDynFlags dflags = do
629 -- someday these will be dynamic flags
630 ways <- readIORef v_Ways
631 refFilesToClean <- newIORef []
632 refDirsToClean <- newIORef Map.empty
635 buildTag = mkBuildTag (filter (not . wayRTSOnly) ways),
636 rtsBuildTag = mkBuildTag ways,
637 filesToClean = refFilesToClean,
638 dirsToClean = refDirsToClean
641 -- | The normal 'DynFlags'. Note that they is not suitable for use in this form
642 -- and must be fully initialized by 'GHC.newSession' first.
643 defaultDynFlags :: DynFlags
646 ghcMode = CompManager,
647 ghcLink = LinkBinary,
648 hscTarget = defaultHscTarget,
654 maxSimplIterations = 4,
655 shouldDumpSimplPhase = Nothing,
657 specConstrThreshold = Just 200,
658 specConstrCount = Just 3,
659 liberateCaseThreshold = Just 200,
660 floatLamArgs = Just 0, -- Default: float only if no fvs
661 strictnessBefore = [],
663 #ifndef OMIT_NATIVE_CODEGEN
664 targetPlatform = defaultTargetPlatform,
667 cmdlineHcIncludes = [],
671 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
673 dphBackend = DPHNone,
675 thisPackage = mainPackageId,
678 dylibInstallName = Nothing,
682 objectSuf = phaseInputExt StopLn,
683 hcSuf = phaseInputExt HCc,
686 outputFile = Nothing,
688 dynLibLoader = SystemDependent,
689 dumpPrefix = Nothing,
690 dumpPrefixForce = Nothing,
694 cmdlineFrameworks = [],
695 tmpDir = cDEFAULT_TMPDIR,
697 rtsOptsEnabled = RtsOptsSafeOnly,
703 then ["-D__PIC__", "-U __PIC__"] -- this list is reversed
716 pkgDatabase = Nothing,
717 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
718 ways = panic "defaultDynFlags: No ways",
719 buildTag = panic "defaultDynFlags: No buildTag",
720 rtsBuildTag = panic "defaultDynFlags: No rtsBuildTag",
722 -- initSysTools fills all these in
723 ghcUsagePath = panic "defaultDynFlags: No ghciUsagePath",
724 ghciUsagePath = panic "defaultDynFlags: No ghciUsagePath",
725 topDir = panic "defaultDynFlags: No topDir",
726 systemPackageConfig = panic "no systemPackageConfig: call GHC.setSessionDynFlags",
727 pgm_L = panic "defaultDynFlags: No pgm_L",
728 pgm_P = panic "defaultDynFlags: No pgm_P",
729 pgm_F = panic "defaultDynFlags: No pgm_F",
730 pgm_c = panic "defaultDynFlags: No pgm_c",
731 pgm_m = panic "defaultDynFlags: No pgm_m",
732 pgm_s = panic "defaultDynFlags: No pgm_s",
733 pgm_a = panic "defaultDynFlags: No pgm_a",
734 pgm_l = panic "defaultDynFlags: No pgm_l",
735 pgm_dll = panic "defaultDynFlags: No pgm_dll",
736 pgm_T = panic "defaultDynFlags: No pgm_T",
737 pgm_sysman = panic "defaultDynFlags: No pgm_sysman",
738 pgm_windres = panic "defaultDynFlags: No pgm_windres",
739 pgm_lo = panic "defaultDynFlags: No pgm_lo",
740 pgm_lc = panic "defaultDynFlags: No pgm_lc",
741 -- end of initSysTools values
743 depMakefile = "Makefile",
744 depIncludePkgDeps = False,
747 -- end of ghc -M values
748 filesToClean = panic "defaultDynFlags: No filesToClean",
749 dirsToClean = panic "defaultDynFlags: No dirsToClean",
750 haddockOptions = Nothing,
751 flags = defaultFlags,
754 extensionFlags = flattenExtensionFlags Nothing [],
756 log_action = \severity srcSpan style msg ->
758 SevOutput -> printOutput (msg style)
759 SevInfo -> printErrs (msg style)
760 SevFatal -> printErrs (msg style)
763 printErrs ((mkLocMessage srcSpan msg) style)
764 -- careful (#2302): printErrs prints in UTF-8, whereas
765 -- converting to string first and using hPutStr would
766 -- just emit the low 8 bits of each unicode char.
770 Note [Verbosity levels]
771 ~~~~~~~~~~~~~~~~~~~~~~~
772 0 | print errors & warnings only
773 1 | minimal verbosity: print "compiling M ... done." for each module.
774 2 | equivalent to -dshow-passes
775 3 | equivalent to existing "ghc -v"
776 4 | "ghc -v -ddump-most"
777 5 | "ghc -v -ddump-all"
783 -- OnOffs accumulate in reverse order, so we use foldr in order to
784 -- process them in the right order
785 flattenExtensionFlags :: Maybe Language -> [OnOff ExtensionFlag]
787 flattenExtensionFlags ml = foldr f defaultExtensionFlags
788 where f (On f) flags = f : delete f flags
789 f (Off f) flags = delete f flags
790 defaultExtensionFlags = languageExtensions ml
792 languageExtensions :: Maybe Language -> [ExtensionFlag]
794 languageExtensions Nothing
795 -- Nothing => the default case
796 = Opt_MonoPatBinds -- Experimentally, I'm making this non-standard
797 -- behaviour the default, to see if anyone notices
799 -- In due course I'd like Opt_MonoLocalBinds to be on by default
800 -- But NB it's implied by GADTs etc
801 -- SLPJ September 2010
802 : Opt_NondecreasingIndentation -- This has been on by default for some time
803 : languageExtensions (Just Haskell2010)
805 languageExtensions (Just Haskell98)
806 = [Opt_ImplicitPrelude,
807 Opt_MonomorphismRestriction,
809 Opt_DatatypeContexts]
811 languageExtensions (Just Haskell2010)
812 = [Opt_ImplicitPrelude,
813 Opt_MonomorphismRestriction,
814 Opt_DatatypeContexts,
816 Opt_ForeignFunctionInterface,
821 -- | Test whether a 'DynFlag' is set
822 dopt :: DynFlag -> DynFlags -> Bool
823 dopt f dflags = f `elem` (flags dflags)
826 dopt_set :: DynFlags -> DynFlag -> DynFlags
827 dopt_set dfs f = dfs{ flags = f : flags dfs }
829 -- | Unset a 'DynFlag'
830 dopt_unset :: DynFlags -> DynFlag -> DynFlags
831 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
833 -- | Test whether a 'ExtensionFlag' is set
834 xopt :: ExtensionFlag -> DynFlags -> Bool
835 xopt f dflags = f `elem` extensionFlags dflags
837 -- | Set a 'ExtensionFlag'
838 xopt_set :: DynFlags -> ExtensionFlag -> DynFlags
840 = let onoffs = On f : extensions dfs
841 in dfs { extensions = onoffs,
842 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
844 -- | Unset a 'ExtensionFlag'
845 xopt_unset :: DynFlags -> ExtensionFlag -> DynFlags
847 = let onoffs = Off f : extensions dfs
848 in dfs { extensions = onoffs,
849 extensionFlags = flattenExtensionFlags (language dfs) onoffs }
851 setLanguage :: Language -> DynP ()
852 setLanguage l = upd f
853 where f dfs = let mLang = Just l
854 oneoffs = extensions dfs
857 extensionFlags = flattenExtensionFlags mLang oneoffs
860 -- | Retrieve the options corresponding to a particular @opt_*@ field in the correct order
861 getOpts :: DynFlags -- ^ 'DynFlags' to retrieve the options from
862 -> (DynFlags -> [a]) -- ^ Relevant record accessor: one of the @opt_*@ accessors
863 -> [a] -- ^ Correctly ordered extracted options
864 getOpts dflags opts = reverse (opts dflags)
865 -- We add to the options from the front, so we need to reverse the list
867 -- | Gets the verbosity flag for the current verbosity level. This is fed to
868 -- other tools, so GHC-specific verbosity flags like @-ddump-most@ are not included
869 getVerbFlag :: DynFlags -> String
871 | verbosity dflags >= 3 = "-v"
874 setObjectDir, setHiDir, setStubDir, setOutputDir, setDylibInstallName,
875 setObjectSuf, setHiSuf, setHcSuf, parseDynLibLoaderMode,
876 setPgmP, addOptl, addOptP,
877 addCmdlineFramework, addHaddockOpts
878 :: String -> DynFlags -> DynFlags
879 setOutputFile, setOutputHi, setDumpPrefixForce
880 :: Maybe String -> DynFlags -> DynFlags
882 setObjectDir f d = d{ objectDir = Just f}
883 setHiDir f d = d{ hiDir = Just f}
884 setStubDir f d = d{ stubDir = Just f, includePaths = f : includePaths d }
885 -- -stubdir D adds an implicit -I D, so that gcc can find the _stub.h file
886 -- \#included from the .hc file when compiling with -fvia-C.
887 setOutputDir f = setObjectDir f . setHiDir f . setStubDir f
888 setDylibInstallName f d = d{ dylibInstallName = Just f}
890 setObjectSuf f d = d{ objectSuf = f}
891 setHiSuf f d = d{ hiSuf = f}
892 setHcSuf f d = d{ hcSuf = f}
894 setOutputFile f d = d{ outputFile = f}
895 setOutputHi f d = d{ outputHi = f}
897 parseDynLibLoaderMode f d =
899 ("deploy", "") -> d{ dynLibLoader = Deployable }
900 ("sysdep", "") -> d{ dynLibLoader = SystemDependent }
901 _ -> ghcError (CmdLineError ("Unknown dynlib loader: " ++ f))
903 setDumpPrefixForce f d = d { dumpPrefixForce = f}
905 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
906 -- Config.hs should really use Option.
907 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
908 addOptl f d = d{ opt_l = f : opt_l d}
909 addOptP f d = d{ opt_P = f : opt_P d}
912 setDepMakefile :: FilePath -> DynFlags -> DynFlags
913 setDepMakefile f d = d { depMakefile = deOptDep f }
915 setDepIncludePkgDeps :: Bool -> DynFlags -> DynFlags
916 setDepIncludePkgDeps b d = d { depIncludePkgDeps = b }
918 addDepExcludeMod :: String -> DynFlags -> DynFlags
920 = d { depExcludeMods = mkModuleName (deOptDep m) : depExcludeMods d }
922 addDepSuffix :: FilePath -> DynFlags -> DynFlags
923 addDepSuffix s d = d { depSuffixes = deOptDep s : depSuffixes d }
926 -- We used to use "-optdep-flag -optdeparg", so for legacy applications
927 -- we need to strip the "-optdep" off of the arg
928 deOptDep :: String -> String
929 deOptDep x = case stripPrefix "-optdep" x of
933 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
935 addHaddockOpts f d = d{ haddockOptions = Just f}
937 -- -----------------------------------------------------------------------------
938 -- Command-line options
940 -- | When invoking external tools as part of the compilation pipeline, we
941 -- pass these a sequence of options on the command-line. Rather than
942 -- just using a list of Strings, we use a type that allows us to distinguish
943 -- between filepaths and 'other stuff'. The reason for this is that
944 -- this type gives us a handle on transforming filenames, and filenames only,
945 -- to whatever format they're expected to be on a particular platform.
947 = FileOption -- an entry that _contains_ filename(s) / filepaths.
948 String -- a non-filepath prefix that shouldn't be
949 -- transformed (e.g., "/out=")
950 String -- the filepath/filename portion
953 showOpt :: Option -> String
954 showOpt (FileOption pre f) = pre ++ f
955 showOpt (Option s) = s
957 -----------------------------------------------------------------------------
958 -- Setting the optimisation level
960 updOptLevel :: Int -> DynFlags -> DynFlags
961 -- ^ Sets the 'DynFlags' to be appropriate to the optimisation level
963 = dfs2{ optLevel = final_n }
965 final_n = max 0 (min 2 n) -- Clamp to 0 <= n <= 2
966 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
967 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
969 extra_dopts = [ f | (ns,f) <- optLevelFlags, final_n `elem` ns ]
970 remove_dopts = [ f | (ns,f) <- optLevelFlags, final_n `notElem` ns ]
972 -- -----------------------------------------------------------------------------
973 -- StgToDo: abstraction of stg-to-stg passes to run.
976 = StgDoMassageForProfiling -- should be (next to) last
977 -- There's also setStgVarInfo, but its absolute "lastness"
978 -- is so critical that it is hardwired in (no flag).
981 getStgToDo :: DynFlags -> [StgToDo]
985 stg_stats = dopt Opt_StgStats dflags
987 todo1 = if stg_stats then [D_stg_stats] else []
989 todo2 | WayProf `elem` wayNames dflags
990 = StgDoMassageForProfiling : todo1
994 {- **********************************************************************
998 %********************************************************************* -}
1000 -- -----------------------------------------------------------------------------
1001 -- Parsing the dynamic flags.
1003 -- | Parse dynamic flags from a list of command line arguments. Returns the
1004 -- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
1005 -- Throws a 'UsageError' if errors occurred during parsing (such as unknown
1006 -- flags or missing arguments).
1007 parseDynamicFlags :: Monad m =>
1008 DynFlags -> [Located String]
1009 -> m (DynFlags, [Located String], [Located String])
1010 -- ^ Updated 'DynFlags', left-over arguments, and
1011 -- list of warnings.
1012 parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
1014 -- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
1015 -- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
1016 parseDynamicNoPackageFlags :: Monad m =>
1017 DynFlags -> [Located String]
1018 -> m (DynFlags, [Located String], [Located String])
1019 -- ^ Updated 'DynFlags', left-over arguments, and
1020 -- list of warnings.
1021 parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
1023 parseDynamicFlags_ :: Monad m =>
1024 DynFlags -> [Located String] -> Bool
1025 -> m (DynFlags, [Located String], [Located String])
1026 parseDynamicFlags_ dflags0 args pkg_flags = do
1027 -- XXX Legacy support code
1028 -- We used to accept things like
1029 -- optdep-f -optdepdepend
1030 -- optdep-f -optdep depend
1031 -- optdep -f -optdepdepend
1032 -- optdep -f -optdep depend
1033 -- but the spaces trip up proper argument handling. So get rid of them.
1034 let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
1035 f (x : xs) = x : f xs
1039 -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
1040 flag_spec | pkg_flags = package_flags ++ dynamic_flags
1041 | otherwise = dynamic_flags
1043 let ((leftover, errs, warns), dflags1)
1044 = runCmdLine (processArgs flag_spec args') dflags0
1045 when (not (null errs)) $ ghcError $ errorsToGhcException errs
1047 -- Cannot use -fPIC with registerised -fvia-C, because the mangler
1048 -- isn't up to the job. We know that if hscTarget == HscC, then the
1049 -- user has explicitly used -fvia-C, because -fasm is the default,
1050 -- unless there is no NCG on this platform. The latter case is
1051 -- checked when the -fPIC flag is parsed.
1053 let (pic_warns, dflags2)
1054 | opt_PIC && hscTarget dflags1 == HscC && cGhcUnregisterised == "NO"
1055 = ([L noSrcSpan $ "Warning: -fvia-C is incompatible with -fPIC; ignoring -fvia-C"],
1056 dflags1{ hscTarget = HscAsm })
1057 #if !(x86_64_TARGET_ARCH && linux_TARGET_OS)
1058 | (not opt_Static || opt_PIC) && hscTarget dflags1 == HscLlvm
1059 = ([L noSrcSpan $ "Warning: -fllvm is incompatible with -fPIC and -"
1060 ++ "dynamic on this platform;\n ignoring -fllvm"],
1061 dflags1{ hscTarget = HscAsm })
1063 | otherwise = ([], dflags1)
1065 return (dflags2, leftover, pic_warns ++ warns)
1068 {- **********************************************************************
1070 DynFlags specifications
1072 %********************************************************************* -}
1074 allFlags :: [String]
1075 allFlags = map ('-':) $
1076 [ flagName flag | flag <- dynamic_flags, ok (flagOptKind flag) ] ++
1077 map ("fno-"++) flags ++
1078 map ("f"++) flags ++
1079 map ("f"++) flags' ++
1080 map ("X"++) supportedExtensions
1081 where ok (PrefixPred _ _) = False
1083 flags = [ name | (name, _, _) <- fFlags ]
1084 flags' = [ name | (name, _, _) <- fLangFlags ]
1086 --------------- The main flags themselves ------------------
1087 dynamic_flags :: [Flag (CmdLineP DynFlags)]
1089 Flag "n" (NoArg (setDynFlag Opt_DryRun))
1090 , Flag "cpp" (NoArg (setExtensionFlag Opt_Cpp))
1091 , Flag "F" (NoArg (setDynFlag Opt_Pp))
1093 (HasArg (\s -> do { addCmdlineHCInclude s
1094 ; addWarn "-#include and INCLUDE pragmas are deprecated: They no longer have any effect" }))
1095 , Flag "v" (OptIntSuffix setVerbosity)
1097 ------- Specific phases --------------------------------------------
1098 -- need to appear before -pgmL to be parsed as LLVM flags.
1099 , Flag "pgmlo" (hasArg (\f d -> d{ pgm_lo = (f,[])}))
1100 , Flag "pgmlc" (hasArg (\f d -> d{ pgm_lc = (f,[])}))
1101 , Flag "pgmL" (hasArg (\f d -> d{ pgm_L = f}))
1102 , Flag "pgmP" (hasArg setPgmP)
1103 , Flag "pgmF" (hasArg (\f d -> d{ pgm_F = f}))
1104 , Flag "pgmc" (hasArg (\f d -> d{ pgm_c = (f,[])}))
1105 , Flag "pgmm" (hasArg (\f d -> d{ pgm_m = (f,[])}))
1106 , Flag "pgms" (hasArg (\f d -> d{ pgm_s = (f,[])}))
1107 , Flag "pgma" (hasArg (\f d -> d{ pgm_a = (f,[])}))
1108 , Flag "pgml" (hasArg (\f d -> d{ pgm_l = (f,[])}))
1109 , Flag "pgmdll" (hasArg (\f d -> d{ pgm_dll = (f,[])}))
1110 , Flag "pgmwindres" (hasArg (\f d -> d{ pgm_windres = f}))
1112 -- need to appear before -optl/-opta to be parsed as LLVM flags.
1113 , Flag "optlo" (hasArg (\f d -> d{ opt_lo = f : opt_lo d}))
1114 , Flag "optlc" (hasArg (\f d -> d{ opt_lc = f : opt_lc d}))
1115 , Flag "optL" (hasArg (\f d -> d{ opt_L = f : opt_L d}))
1116 , Flag "optP" (hasArg addOptP)
1117 , Flag "optF" (hasArg (\f d -> d{ opt_F = f : opt_F d}))
1118 , Flag "optc" (hasArg (\f d -> d{ opt_c = f : opt_c d}))
1119 , Flag "optm" (hasArg (\f d -> d{ opt_m = f : opt_m d}))
1120 , Flag "opta" (hasArg (\f d -> d{ opt_a = f : opt_a d}))
1121 , Flag "optl" (hasArg addOptl)
1122 , Flag "optwindres" (hasArg (\f d -> d{ opt_windres = f : opt_windres d}))
1125 (NoArg (if can_split
1126 then setDynFlag Opt_SplitObjs
1127 else addWarn "ignoring -fsplit-objs"))
1129 -------- ghc -M -----------------------------------------------------
1130 , Flag "dep-suffix" (hasArg addDepSuffix)
1131 , Flag "optdep-s" (hasArgDF addDepSuffix "Use -dep-suffix instead")
1132 , Flag "dep-makefile" (hasArg setDepMakefile)
1133 , Flag "optdep-f" (hasArgDF setDepMakefile "Use -dep-makefile instead")
1134 , Flag "optdep-w" (NoArg (deprecate "doesn't do anything"))
1135 , Flag "include-pkg-deps" (noArg (setDepIncludePkgDeps True))
1136 , Flag "optdep--include-prelude" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1137 , Flag "optdep--include-pkg-deps" (noArgDF (setDepIncludePkgDeps True) "Use -include-pkg-deps instead")
1138 , Flag "exclude-module" (hasArg addDepExcludeMod)
1139 , Flag "optdep--exclude-module" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1140 , Flag "optdep-x" (hasArgDF addDepExcludeMod "Use -exclude-module instead")
1142 -------- Linking ----------------------------------------------------
1143 , Flag "no-link" (noArg (\d -> d{ ghcLink=NoLink }))
1144 , Flag "shared" (noArg (\d -> d{ ghcLink=LinkDynLib }))
1145 , Flag "dynload" (hasArg parseDynLibLoaderMode)
1146 , Flag "dylib-install-name" (hasArg setDylibInstallName)
1148 ------- Libraries ---------------------------------------------------
1149 , Flag "L" (Prefix addLibraryPath)
1150 , Flag "l" (AnySuffix (upd . addOptl))
1152 ------- Frameworks --------------------------------------------------
1153 -- -framework-path should really be -F ...
1154 , Flag "framework-path" (HasArg addFrameworkPath)
1155 , Flag "framework" (hasArg addCmdlineFramework)
1157 ------- Output Redirection ------------------------------------------
1158 , Flag "odir" (hasArg setObjectDir)
1159 , Flag "o" (SepArg (upd . setOutputFile . Just))
1160 , Flag "ohi" (hasArg (setOutputHi . Just ))
1161 , Flag "osuf" (hasArg setObjectSuf)
1162 , Flag "hcsuf" (hasArg setHcSuf)
1163 , Flag "hisuf" (hasArg setHiSuf)
1164 , Flag "hidir" (hasArg setHiDir)
1165 , Flag "tmpdir" (hasArg setTmpDir)
1166 , Flag "stubdir" (hasArg setStubDir)
1167 , Flag "outputdir" (hasArg setOutputDir)
1168 , Flag "ddump-file-prefix" (hasArg (setDumpPrefixForce . Just))
1170 ------- Keeping temporary files -------------------------------------
1171 -- These can be singular (think ghc -c) or plural (think ghc --make)
1172 , Flag "keep-hc-file" (NoArg (setDynFlag Opt_KeepHcFiles))
1173 , Flag "keep-hc-files" (NoArg (setDynFlag Opt_KeepHcFiles))
1174 , Flag "keep-s-file" (NoArg (setDynFlag Opt_KeepSFiles))
1175 , Flag "keep-s-files" (NoArg (setDynFlag Opt_KeepSFiles))
1176 , Flag "keep-raw-s-file" (NoArg (setDynFlag Opt_KeepRawSFiles))
1177 , Flag "keep-raw-s-files" (NoArg (setDynFlag Opt_KeepRawSFiles))
1178 , Flag "keep-llvm-file" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1179 , Flag "keep-llvm-files" (NoArg (setDynFlag Opt_KeepLlvmFiles))
1180 -- This only makes sense as plural
1181 , Flag "keep-tmp-files" (NoArg (setDynFlag Opt_KeepTmpFiles))
1183 ------- Miscellaneous ----------------------------------------------
1184 , Flag "no-auto-link-packages" (NoArg (unSetDynFlag Opt_AutoLinkPackages))
1185 , Flag "no-hs-main" (NoArg (setDynFlag Opt_NoHsMain))
1186 , Flag "with-rtsopts" (HasArg setRtsOpts)
1187 , Flag "rtsopts" (NoArg (setRtsOptsEnabled RtsOptsAll))
1188 , Flag "rtsopts=all" (NoArg (setRtsOptsEnabled RtsOptsAll))
1189 , Flag "rtsopts=some" (NoArg (setRtsOptsEnabled RtsOptsSafeOnly))
1190 , Flag "rtsopts=none" (NoArg (setRtsOptsEnabled RtsOptsNone))
1191 , Flag "no-rtsopts" (NoArg (setRtsOptsEnabled RtsOptsNone))
1192 , Flag "main-is" (SepArg setMainIs)
1193 , Flag "haddock" (NoArg (setDynFlag Opt_Haddock))
1194 , Flag "haddock-opts" (hasArg addHaddockOpts)
1195 , Flag "hpcdir" (SepArg setOptHpcDir)
1197 ------- recompilation checker --------------------------------------
1198 , Flag "recomp" (NoArg (do { unSetDynFlag Opt_ForceRecomp
1199 ; deprecate "Use -fno-force-recomp instead" }))
1200 , Flag "no-recomp" (NoArg (do { setDynFlag Opt_ForceRecomp
1201 ; deprecate "Use -fforce-recomp instead" }))
1203 ------ HsCpp opts ---------------------------------------------------
1204 , Flag "D" (AnySuffix (upd . addOptP))
1205 , Flag "U" (AnySuffix (upd . addOptP))
1207 ------- Include/Import Paths ----------------------------------------
1208 , Flag "I" (Prefix addIncludePath)
1209 , Flag "i" (OptPrefix addImportPath)
1211 ------ Debugging ----------------------------------------------------
1212 , Flag "dstg-stats" (NoArg (setDynFlag Opt_StgStats))
1214 , Flag "ddump-cmm" (setDumpFlag Opt_D_dump_cmm)
1215 , Flag "ddump-cmmz" (setDumpFlag Opt_D_dump_cmmz)
1216 , Flag "ddump-cmmz-pretty" (setDumpFlag Opt_D_dump_cmmz_pretty)
1217 , Flag "ddump-cps-cmm" (setDumpFlag Opt_D_dump_cps_cmm)
1218 , Flag "ddump-cvt-cmm" (setDumpFlag Opt_D_dump_cvt_cmm)
1219 , Flag "ddump-asm" (setDumpFlag Opt_D_dump_asm)
1220 , Flag "ddump-asm-native" (setDumpFlag Opt_D_dump_asm_native)
1221 , Flag "ddump-asm-liveness" (setDumpFlag Opt_D_dump_asm_liveness)
1222 , Flag "ddump-asm-coalesce" (setDumpFlag Opt_D_dump_asm_coalesce)
1223 , Flag "ddump-asm-regalloc" (setDumpFlag Opt_D_dump_asm_regalloc)
1224 , Flag "ddump-asm-conflicts" (setDumpFlag Opt_D_dump_asm_conflicts)
1225 , Flag "ddump-asm-regalloc-stages" (setDumpFlag Opt_D_dump_asm_regalloc_stages)
1226 , Flag "ddump-asm-stats" (setDumpFlag Opt_D_dump_asm_stats)
1227 , Flag "ddump-asm-expanded" (setDumpFlag Opt_D_dump_asm_expanded)
1228 , Flag "ddump-llvm" (NoArg (do { setObjTarget HscLlvm
1229 ; setDumpFlag' Opt_D_dump_llvm}))
1230 , Flag "ddump-cpranal" (setDumpFlag Opt_D_dump_cpranal)
1231 , Flag "ddump-deriv" (setDumpFlag Opt_D_dump_deriv)
1232 , Flag "ddump-ds" (setDumpFlag Opt_D_dump_ds)
1233 , Flag "ddump-flatC" (setDumpFlag Opt_D_dump_flatC)
1234 , Flag "ddump-foreign" (setDumpFlag Opt_D_dump_foreign)
1235 , Flag "ddump-inlinings" (setDumpFlag Opt_D_dump_inlinings)
1236 , Flag "ddump-rule-firings" (setDumpFlag Opt_D_dump_rule_firings)
1237 , Flag "ddump-rule-rewrites" (setDumpFlag Opt_D_dump_rule_rewrites)
1238 , Flag "ddump-occur-anal" (setDumpFlag Opt_D_dump_occur_anal)
1239 , Flag "ddump-parsed" (setDumpFlag Opt_D_dump_parsed)
1240 , Flag "ddump-rn" (setDumpFlag Opt_D_dump_rn)
1241 , Flag "ddump-simpl" (setDumpFlag Opt_D_dump_simpl)
1242 , Flag "ddump-simpl-iterations" (setDumpFlag Opt_D_dump_simpl_iterations)
1243 , Flag "ddump-simpl-phases" (OptPrefix setDumpSimplPhases)
1244 , Flag "ddump-spec" (setDumpFlag Opt_D_dump_spec)
1245 , Flag "ddump-prep" (setDumpFlag Opt_D_dump_prep)
1246 , Flag "ddump-stg" (setDumpFlag Opt_D_dump_stg)
1247 , Flag "ddump-stranal" (setDumpFlag Opt_D_dump_stranal)
1248 , Flag "ddump-tc" (setDumpFlag Opt_D_dump_tc)
1249 , Flag "ddump-types" (setDumpFlag Opt_D_dump_types)
1250 , Flag "ddump-rules" (setDumpFlag Opt_D_dump_rules)
1251 , Flag "ddump-cse" (setDumpFlag Opt_D_dump_cse)
1252 , Flag "ddump-worker-wrapper" (setDumpFlag Opt_D_dump_worker_wrapper)
1253 , Flag "ddump-rn-trace" (setDumpFlag Opt_D_dump_rn_trace)
1254 , Flag "ddump-if-trace" (setDumpFlag Opt_D_dump_if_trace)
1255 , Flag "ddump-tc-trace" (setDumpFlag Opt_D_dump_tc_trace)
1256 , Flag "ddump-splices" (setDumpFlag Opt_D_dump_splices)
1257 , Flag "ddump-rn-stats" (setDumpFlag Opt_D_dump_rn_stats)
1258 , Flag "ddump-opt-cmm" (setDumpFlag Opt_D_dump_opt_cmm)
1259 , Flag "ddump-simpl-stats" (setDumpFlag Opt_D_dump_simpl_stats)
1260 , Flag "ddump-bcos" (setDumpFlag Opt_D_dump_BCOs)
1261 , Flag "dsource-stats" (setDumpFlag Opt_D_source_stats)
1262 , Flag "dverbose-core2core" (NoArg (do { setVerbosity (Just 2)
1263 ; setVerboseCore2Core }))
1264 , Flag "dverbose-stg2stg" (setDumpFlag Opt_D_verbose_stg2stg)
1265 , Flag "ddump-hi" (setDumpFlag Opt_D_dump_hi)
1266 , Flag "ddump-minimal-imports" (setDumpFlag Opt_D_dump_minimal_imports)
1267 , Flag "ddump-vect" (setDumpFlag Opt_D_dump_vect)
1268 , Flag "ddump-hpc" (setDumpFlag Opt_D_dump_hpc)
1269 , Flag "ddump-mod-cycles" (setDumpFlag Opt_D_dump_mod_cycles)
1270 , Flag "ddump-view-pattern-commoning" (setDumpFlag Opt_D_dump_view_pattern_commoning)
1271 , Flag "ddump-to-file" (setDumpFlag Opt_DumpToFile)
1272 , Flag "ddump-hi-diffs" (setDumpFlag Opt_D_dump_hi_diffs)
1273 , Flag "ddump-rtti" (setDumpFlag Opt_D_dump_rtti)
1274 , Flag "dcore-lint" (NoArg (setDynFlag Opt_DoCoreLinting))
1275 , Flag "dstg-lint" (NoArg (setDynFlag Opt_DoStgLinting))
1276 , Flag "dcmm-lint" (NoArg (setDynFlag Opt_DoCmmLinting))
1277 , Flag "dasm-lint" (NoArg (setDynFlag Opt_DoAsmLinting))
1278 , Flag "dshow-passes" (NoArg (do forceRecompile
1279 setVerbosity (Just 2)))
1280 , Flag "dfaststring-stats" (NoArg (setDynFlag Opt_D_faststring_stats))
1282 ------ Machine dependant (-m<blah>) stuff ---------------------------
1284 , Flag "monly-2-regs" (noArg (\s -> s{stolen_x86_regs = 2}))
1285 , Flag "monly-3-regs" (noArg (\s -> s{stolen_x86_regs = 3}))
1286 , Flag "monly-4-regs" (noArg (\s -> s{stolen_x86_regs = 4}))
1287 , Flag "msse2" (NoArg (setDynFlag Opt_SSE2))
1289 ------ Warning opts -------------------------------------------------
1290 , Flag "W" (NoArg (mapM_ setDynFlag minusWOpts))
1291 , Flag "Werror" (NoArg (setDynFlag Opt_WarnIsError))
1292 , Flag "Wwarn" (NoArg (unSetDynFlag Opt_WarnIsError))
1293 , Flag "Wall" (NoArg (mapM_ setDynFlag minusWallOpts))
1294 , Flag "Wnot" (NoArg (do { mapM_ unSetDynFlag minusWallOpts
1295 ; deprecate "Use -w instead" }))
1296 , Flag "w" (NoArg (mapM_ unSetDynFlag minuswRemovesOpts))
1298 ------ Optimisation flags ------------------------------------------
1299 , Flag "O" (noArg (setOptLevel 1))
1300 , Flag "Onot" (noArgDF (setOptLevel 0) "Use -O0 instead")
1301 , Flag "Odph" (noArg setDPHOpt)
1302 , Flag "O" (OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
1303 -- If the number is missing, use 1
1305 , Flag "fsimplifier-phases" (intSuffix (\n d -> d{ simplPhases = n }))
1306 , Flag "fmax-simplifier-iterations" (intSuffix (\n d -> d{ maxSimplIterations = n }))
1307 , Flag "fspec-constr-threshold" (intSuffix (\n d -> d{ specConstrThreshold = Just n }))
1308 , Flag "fno-spec-constr-threshold" (noArg (\d -> d{ specConstrThreshold = Nothing }))
1309 , Flag "fspec-constr-count" (intSuffix (\n d -> d{ specConstrCount = Just n }))
1310 , Flag "fno-spec-constr-count" (noArg (\d -> d{ specConstrCount = Nothing }))
1311 , Flag "fliberate-case-threshold" (intSuffix (\n d -> d{ liberateCaseThreshold = Just n }))
1312 , Flag "fno-liberate-case-threshold" (noArg (\d -> d{ liberateCaseThreshold = Nothing }))
1313 , Flag "frule-check" (SepArg (\s -> upd (\d -> d{ ruleCheck = Just s })))
1314 , Flag "fcontext-stack" (intSuffix (\n d -> d{ ctxtStkDepth = n }))
1315 , Flag "fstrictness-before" (intSuffix (\n d -> d{ strictnessBefore = n : strictnessBefore d }))
1316 , Flag "ffloat-lam-args" (intSuffix (\n d -> d{ floatLamArgs = Just n }))
1317 , Flag "ffloat-all-lams" (intSuffix (\n d -> d{ floatLamArgs = Nothing }))
1319 ------ Profiling ----------------------------------------------------
1321 -- XXX Should the -f* flags be deprecated?
1322 -- They don't seem to be documented
1323 , Flag "fauto-sccs-on-all-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1324 , Flag "auto-all" (NoArg (setDynFlag Opt_AutoSccsOnAllToplevs))
1325 , Flag "no-auto-all" (NoArg (unSetDynFlag Opt_AutoSccsOnAllToplevs))
1326 , Flag "fauto-sccs-on-exported-toplevs" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1327 , Flag "auto" (NoArg (setDynFlag Opt_AutoSccsOnExportedToplevs))
1328 , Flag "no-auto" (NoArg (unSetDynFlag Opt_AutoSccsOnExportedToplevs))
1329 , Flag "fauto-sccs-on-individual-cafs" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1330 , Flag "caf-all" (NoArg (setDynFlag Opt_AutoSccsOnIndividualCafs))
1331 , Flag "no-caf-all" (NoArg (unSetDynFlag Opt_AutoSccsOnIndividualCafs))
1333 ------ DPH flags ----------------------------------------------------
1335 , Flag "fdph-seq" (NoArg (setDPHBackend DPHSeq))
1336 , Flag "fdph-par" (NoArg (setDPHBackend DPHPar))
1337 , Flag "fdph-this" (NoArg (setDPHBackend DPHThis))
1338 , Flag "fdph-none" (NoArg (setDPHBackend DPHNone))
1340 ------ Compiler flags -----------------------------------------------
1342 , Flag "fasm" (NoArg (setObjTarget HscAsm))
1343 , Flag "fvia-c" (NoArg (setObjTarget HscC >>
1344 (addWarn "The -fvia-c flag will be removed in a future GHC release")))
1345 , Flag "fvia-C" (NoArg (setObjTarget HscC >>
1346 (addWarn "The -fvia-C flag will be removed in a future GHC release")))
1347 , Flag "fllvm" (NoArg (setObjTarget HscLlvm))
1349 , Flag "fno-code" (NoArg (do upd $ \d -> d{ ghcLink=NoLink }
1350 setTarget HscNothing))
1351 , Flag "fbyte-code" (NoArg (setTarget HscInterpreted))
1352 , Flag "fobject-code" (NoArg (setTarget defaultHscTarget))
1353 , Flag "fglasgow-exts" (NoArg (enableGlasgowExts >> deprecate "Use individual extensions instead"))
1354 , Flag "fno-glasgow-exts" (NoArg (disableGlasgowExts >> deprecate "Use individual extensions instead"))
1356 ++ map (mkFlag turnOn "f" setDynFlag ) fFlags
1357 ++ map (mkFlag turnOff "fno-" unSetDynFlag) fFlags
1358 ++ map (mkFlag turnOn "f" setExtensionFlag ) fLangFlags
1359 ++ map (mkFlag turnOff "fno-" unSetExtensionFlag) fLangFlags
1360 ++ map (mkFlag turnOn "X" setExtensionFlag ) xFlags
1361 ++ map (mkFlag turnOff "XNo" unSetExtensionFlag) xFlags
1362 ++ map (mkFlag turnOn "X" setLanguage) languageFlags
1364 package_flags :: [Flag (CmdLineP DynFlags)]
1366 ------- Packages ----------------------------------------------------
1367 Flag "package-conf" (HasArg extraPkgConf_)
1368 , Flag "no-user-package-conf" (NoArg (unSetDynFlag Opt_ReadUserPackageConf))
1369 , Flag "package-name" (hasArg setPackageName)
1370 , Flag "package-id" (HasArg exposePackageId)
1371 , Flag "package" (HasArg exposePackage)
1372 , Flag "hide-package" (HasArg hidePackage)
1373 , Flag "hide-all-packages" (NoArg (setDynFlag Opt_HideAllPackages))
1374 , Flag "ignore-package" (HasArg ignorePackage)
1375 , Flag "syslib" (HasArg (\s -> do { exposePackage s
1376 ; deprecate "Use -package instead" }))
1379 type TurnOnFlag = Bool -- True <=> we are turning the flag on
1380 -- False <=> we are turning the flag off
1381 turnOn :: TurnOnFlag; turnOn = True
1382 turnOff :: TurnOnFlag; turnOff = False
1385 = ( String -- Flag in string form
1386 , flag -- Flag in internal form
1387 , TurnOnFlag -> DynP ()) -- Extra action to run when the flag is found
1388 -- Typically, emit a warning or error
1390 mkFlag :: TurnOnFlag -- ^ True <=> it should be turned on
1391 -> String -- ^ The flag prefix
1392 -> (flag -> DynP ()) -- ^ What to do when the flag is found
1393 -> FlagSpec flag -- ^ Specification of this particular flag
1394 -> Flag (CmdLineP DynFlags)
1395 mkFlag turn_on flagPrefix f (name, flag, extra_action)
1396 = Flag (flagPrefix ++ name) (NoArg (f flag >> extra_action turn_on))
1398 deprecatedForExtension :: String -> TurnOnFlag -> DynP ()
1399 deprecatedForExtension lang turn_on
1400 = deprecate ("use -X" ++ flag ++ " or pragma {-# LANGUAGE " ++ flag ++ " #-} instead")
1402 flag | turn_on = lang
1403 | otherwise = "No"++lang
1405 useInstead :: String -> TurnOnFlag -> DynP ()
1406 useInstead flag turn_on
1407 = deprecate ("Use -f" ++ no ++ flag ++ " instead")
1409 no = if turn_on then "" else "no-"
1411 nop :: TurnOnFlag -> DynP ()
1414 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1415 fFlags :: [FlagSpec DynFlag]
1417 ( "warn-dodgy-foreign-imports", Opt_WarnDodgyForeignImports, nop ),
1418 ( "warn-dodgy-exports", Opt_WarnDodgyExports, nop ),
1419 ( "warn-dodgy-imports", Opt_WarnDodgyImports, nop ),
1420 ( "warn-duplicate-exports", Opt_WarnDuplicateExports, nop ),
1421 ( "warn-hi-shadowing", Opt_WarnHiShadows, nop ),
1422 ( "warn-implicit-prelude", Opt_WarnImplicitPrelude, nop ),
1423 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns, nop ),
1424 ( "warn-incomplete-uni-patterns", Opt_WarnIncompleteUniPatterns, nop ),
1425 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd, nop ),
1426 ( "warn-missing-fields", Opt_WarnMissingFields, nop ),
1427 ( "warn-missing-import-lists", Opt_WarnMissingImportList, nop ),
1428 ( "warn-missing-methods", Opt_WarnMissingMethods, nop ),
1429 ( "warn-missing-signatures", Opt_WarnMissingSigs, nop ),
1430 ( "warn-missing-local-sigs", Opt_WarnMissingLocalSigs, nop ),
1431 ( "warn-name-shadowing", Opt_WarnNameShadowing, nop ),
1432 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns, nop ),
1433 ( "warn-type-defaults", Opt_WarnTypeDefaults, nop ),
1434 ( "warn-monomorphism-restriction", Opt_WarnMonomorphism, nop ),
1435 ( "warn-unused-binds", Opt_WarnUnusedBinds, nop ),
1436 ( "warn-unused-imports", Opt_WarnUnusedImports, nop ),
1437 ( "warn-unused-matches", Opt_WarnUnusedMatches, nop ),
1438 ( "warn-warnings-deprecations", Opt_WarnWarningsDeprecations, nop ),
1439 ( "warn-deprecations", Opt_WarnWarningsDeprecations, nop ),
1440 ( "warn-deprecated-flags", Opt_WarnDeprecatedFlags, nop ),
1441 ( "warn-orphans", Opt_WarnOrphans, nop ),
1442 ( "warn-identities", Opt_WarnIdentities, nop ),
1443 ( "warn-auto-orphans", Opt_WarnAutoOrphans, nop ),
1444 ( "warn-tabs", Opt_WarnTabs, nop ),
1445 ( "warn-unrecognised-pragmas", Opt_WarnUnrecognisedPragmas, nop ),
1446 ( "warn-lazy-unlifted-bindings", Opt_WarnLazyUnliftedBindings, nop),
1447 ( "warn-unused-do-bind", Opt_WarnUnusedDoBind, nop ),
1448 ( "warn-wrong-do-bind", Opt_WarnWrongDoBind, nop ),
1449 ( "warn-alternative-layout-rule-transitional", Opt_WarnAlternativeLayoutRuleTransitional, nop ),
1450 ( "print-explicit-foralls", Opt_PrintExplicitForalls, nop ),
1451 ( "strictness", Opt_Strictness, nop ),
1452 ( "specialise", Opt_Specialise, nop ),
1453 ( "float-in", Opt_FloatIn, nop ),
1454 ( "static-argument-transformation", Opt_StaticArgumentTransformation, nop ),
1455 ( "full-laziness", Opt_FullLaziness, nop ),
1456 ( "liberate-case", Opt_LiberateCase, nop ),
1457 ( "spec-constr", Opt_SpecConstr, nop ),
1458 ( "cse", Opt_CSE, nop ),
1459 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas, nop ),
1460 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas, nop ),
1461 ( "expose-all-unfoldings", Opt_ExposeAllUnfoldings, nop ),
1462 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion, nop ),
1463 ( "ignore-asserts", Opt_IgnoreAsserts, nop ),
1464 ( "do-eta-reduction", Opt_DoEtaReduction, nop ),
1465 ( "case-merge", Opt_CaseMerge, nop ),
1466 ( "unbox-strict-fields", Opt_UnboxStrictFields, nop ),
1467 ( "method-sharing", Opt_MethodSharing,
1468 \_ -> deprecate "doesn't do anything any more"),
1469 -- Remove altogether in GHC 7.2
1470 ( "dicts-cheap", Opt_DictsCheap, nop ),
1471 ( "excess-precision", Opt_ExcessPrecision, nop ),
1472 ( "eager-blackholing", Opt_EagerBlackHoling, nop ),
1473 ( "asm-mangling", Opt_DoAsmMangling, nop ),
1474 ( "print-bind-result", Opt_PrintBindResult, nop ),
1475 ( "force-recomp", Opt_ForceRecomp, nop ),
1476 ( "hpc-no-auto", Opt_Hpc_No_Auto, nop ),
1477 ( "rewrite-rules", Opt_EnableRewriteRules, useInstead "enable-rewrite-rules" ),
1478 ( "enable-rewrite-rules", Opt_EnableRewriteRules, nop ),
1479 ( "break-on-exception", Opt_BreakOnException, nop ),
1480 ( "break-on-error", Opt_BreakOnError, nop ),
1481 ( "print-evld-with-show", Opt_PrintEvldWithShow, nop ),
1482 ( "print-bind-contents", Opt_PrintBindContents, nop ),
1483 ( "run-cps", Opt_RunCPS, nop ),
1484 ( "run-cpsz", Opt_RunCPSZ, nop ),
1485 ( "new-codegen", Opt_TryNewCodeGen, nop ),
1486 ( "convert-to-zipper-and-back", Opt_ConvertToZipCfgAndBack, nop ),
1487 ( "vectorise", Opt_Vectorise, nop ),
1488 ( "regs-graph", Opt_RegsGraph, nop ),
1489 ( "regs-iterative", Opt_RegsIterative, nop ),
1490 ( "gen-manifest", Opt_GenManifest, nop ),
1491 ( "embed-manifest", Opt_EmbedManifest, nop ),
1492 ( "ext-core", Opt_EmitExternalCore, nop ),
1493 ( "shared-implib", Opt_SharedImplib, nop ),
1494 ( "ghci-sandbox", Opt_GhciSandbox, nop ),
1495 ( "helpful-errors", Opt_HelpfulErrors, nop ),
1496 ( "building-cabal-package", Opt_BuildingCabalPackage, nop ),
1497 ( "implicit-import-qualified", Opt_ImplicitImportQualified, nop )
1500 -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@
1501 fLangFlags :: [FlagSpec ExtensionFlag]
1503 ( "th", Opt_TemplateHaskell,
1504 deprecatedForExtension "TemplateHaskell" >> checkTemplateHaskellOk ),
1505 ( "fi", Opt_ForeignFunctionInterface,
1506 deprecatedForExtension "ForeignFunctionInterface" ),
1507 ( "ffi", Opt_ForeignFunctionInterface,
1508 deprecatedForExtension "ForeignFunctionInterface" ),
1509 ( "arrows", Opt_Arrows,
1510 deprecatedForExtension "Arrows" ),
1511 ( "generics", Opt_Generics,
1512 deprecatedForExtension "Generics" ),
1513 ( "implicit-prelude", Opt_ImplicitPrelude,
1514 deprecatedForExtension "ImplicitPrelude" ),
1515 ( "bang-patterns", Opt_BangPatterns,
1516 deprecatedForExtension "BangPatterns" ),
1517 ( "monomorphism-restriction", Opt_MonomorphismRestriction,
1518 deprecatedForExtension "MonomorphismRestriction" ),
1519 ( "mono-pat-binds", Opt_MonoPatBinds,
1520 deprecatedForExtension "MonoPatBinds" ),
1521 ( "extended-default-rules", Opt_ExtendedDefaultRules,
1522 deprecatedForExtension "ExtendedDefaultRules" ),
1523 ( "implicit-params", Opt_ImplicitParams,
1524 deprecatedForExtension "ImplicitParams" ),
1525 ( "scoped-type-variables", Opt_ScopedTypeVariables,
1526 deprecatedForExtension "ScopedTypeVariables" ),
1527 ( "parr", Opt_ParallelArrays,
1528 deprecatedForExtension "ParallelArrays" ),
1529 ( "PArr", Opt_ParallelArrays,
1530 deprecatedForExtension "ParallelArrays" ),
1531 ( "allow-overlapping-instances", Opt_OverlappingInstances,
1532 deprecatedForExtension "OverlappingInstances" ),
1533 ( "allow-undecidable-instances", Opt_UndecidableInstances,
1534 deprecatedForExtension "UndecidableInstances" ),
1535 ( "allow-incoherent-instances", Opt_IncoherentInstances,
1536 deprecatedForExtension "IncoherentInstances" )
1539 supportedLanguages :: [String]
1540 supportedLanguages = [ name | (name, _, _) <- languageFlags ]
1542 supportedExtensions :: [String]
1543 supportedExtensions = [ name' | (name, _, _) <- xFlags, name' <- [name, "No" ++ name] ]
1545 supportedLanguagesAndExtensions :: [String]
1546 supportedLanguagesAndExtensions = supportedLanguages ++ supportedExtensions
1548 -- | These -X<blah> flags cannot be reversed with -XNo<blah>
1549 languageFlags :: [FlagSpec Language]
1551 ( "Haskell98", Haskell98, nop ),
1552 ( "Haskell2010", Haskell2010, nop )
1555 -- | These -X<blah> flags can all be reversed with -XNo<blah>
1556 xFlags :: [FlagSpec ExtensionFlag]
1558 ( "CPP", Opt_Cpp, nop ),
1559 ( "PostfixOperators", Opt_PostfixOperators, nop ),
1560 ( "TupleSections", Opt_TupleSections, nop ),
1561 ( "PatternGuards", Opt_PatternGuards, nop ),
1562 ( "UnicodeSyntax", Opt_UnicodeSyntax, nop ),
1563 ( "MagicHash", Opt_MagicHash, nop ),
1564 ( "PolymorphicComponents", Opt_PolymorphicComponents, nop ),
1565 ( "ExistentialQuantification", Opt_ExistentialQuantification, nop ),
1566 ( "KindSignatures", Opt_KindSignatures, nop ),
1567 ( "EmptyDataDecls", Opt_EmptyDataDecls, nop ),
1568 ( "ParallelListComp", Opt_ParallelListComp, nop ),
1569 ( "TransformListComp", Opt_TransformListComp, nop ),
1570 ( "ForeignFunctionInterface", Opt_ForeignFunctionInterface, nop ),
1571 ( "UnliftedFFITypes", Opt_UnliftedFFITypes, nop ),
1572 ( "GHCForeignImportPrim", Opt_GHCForeignImportPrim, nop ),
1573 ( "LiberalTypeSynonyms", Opt_LiberalTypeSynonyms, nop ),
1574 ( "Rank2Types", Opt_Rank2Types, nop ),
1575 ( "RankNTypes", Opt_RankNTypes, nop ),
1576 ( "ImpredicativeTypes", Opt_ImpredicativeTypes, nop),
1577 ( "TypeOperators", Opt_TypeOperators, nop ),
1578 ( "RecursiveDo", Opt_RecursiveDo,
1579 deprecatedForExtension "DoRec"),
1580 ( "DoRec", Opt_DoRec, nop ),
1581 ( "Arrows", Opt_Arrows, nop ),
1582 ( "ParallelArrays", Opt_ParallelArrays, nop ),
1583 ( "TemplateHaskell", Opt_TemplateHaskell, checkTemplateHaskellOk ),
1584 ( "QuasiQuotes", Opt_QuasiQuotes, nop ),
1585 ( "Generics", Opt_Generics, nop ),
1586 ( "ImplicitPrelude", Opt_ImplicitPrelude, nop ),
1587 ( "RecordWildCards", Opt_RecordWildCards, nop ),
1588 ( "NamedFieldPuns", Opt_RecordPuns, nop ),
1589 ( "RecordPuns", Opt_RecordPuns,
1590 deprecatedForExtension "NamedFieldPuns" ),
1591 ( "DisambiguateRecordFields", Opt_DisambiguateRecordFields, nop ),
1592 ( "OverloadedStrings", Opt_OverloadedStrings, nop ),
1593 ( "GADTs", Opt_GADTs, nop ),
1594 ( "GADTSyntax", Opt_GADTSyntax, nop ),
1595 ( "ViewPatterns", Opt_ViewPatterns, nop ),
1596 ( "TypeFamilies", Opt_TypeFamilies, nop ),
1597 ( "BangPatterns", Opt_BangPatterns, nop ),
1598 ( "MonomorphismRestriction", Opt_MonomorphismRestriction, nop ),
1599 ( "NPlusKPatterns", Opt_NPlusKPatterns, nop ),
1600 ( "DoAndIfThenElse", Opt_DoAndIfThenElse, nop ),
1601 ( "RebindableSyntax", Opt_RebindableSyntax, nop ),
1602 ( "MonoPatBinds", Opt_MonoPatBinds, nop ),
1603 ( "ExplicitForAll", Opt_ExplicitForAll, nop ),
1604 ( "AlternativeLayoutRule", Opt_AlternativeLayoutRule, nop ),
1605 ( "AlternativeLayoutRuleTransitional",Opt_AlternativeLayoutRuleTransitional, nop ),
1606 ( "DatatypeContexts", Opt_DatatypeContexts, nop ),
1607 ( "NondecreasingIndentation", Opt_NondecreasingIndentation, nop ),
1608 ( "RelaxedLayout", Opt_RelaxedLayout, nop ),
1609 ( "MonoLocalBinds", Opt_MonoLocalBinds, nop ),
1610 ( "RelaxedPolyRec", Opt_RelaxedPolyRec,
1611 \ turn_on -> if not turn_on
1612 then deprecate "You can't turn off RelaxedPolyRec any more"
1614 ( "ExtendedDefaultRules", Opt_ExtendedDefaultRules, nop ),
1615 ( "ImplicitParams", Opt_ImplicitParams, nop ),
1616 ( "ScopedTypeVariables", Opt_ScopedTypeVariables, nop ),
1618 ( "PatternSignatures", Opt_ScopedTypeVariables,
1619 deprecatedForExtension "ScopedTypeVariables" ),
1621 ( "UnboxedTuples", Opt_UnboxedTuples, nop ),
1622 ( "StandaloneDeriving", Opt_StandaloneDeriving, nop ),
1623 ( "DeriveDataTypeable", Opt_DeriveDataTypeable, nop ),
1624 ( "DeriveFunctor", Opt_DeriveFunctor, nop ),
1625 ( "DeriveTraversable", Opt_DeriveTraversable, nop ),
1626 ( "DeriveFoldable", Opt_DeriveFoldable, nop ),
1627 ( "TypeSynonymInstances", Opt_TypeSynonymInstances, nop ),
1628 ( "FlexibleContexts", Opt_FlexibleContexts, nop ),
1629 ( "FlexibleInstances", Opt_FlexibleInstances, nop ),
1630 ( "ConstrainedClassMethods", Opt_ConstrainedClassMethods, nop ),
1631 ( "MultiParamTypeClasses", Opt_MultiParamTypeClasses, nop ),
1632 ( "FunctionalDependencies", Opt_FunctionalDependencies, nop ),
1633 ( "GeneralizedNewtypeDeriving", Opt_GeneralizedNewtypeDeriving, nop ),
1634 ( "OverlappingInstances", Opt_OverlappingInstances, nop ),
1635 ( "UndecidableInstances", Opt_UndecidableInstances, nop ),
1636 ( "IncoherentInstances", Opt_IncoherentInstances, nop ),
1637 ( "PackageImports", Opt_PackageImports, nop )
1640 defaultFlags :: [DynFlag]
1642 = [ Opt_AutoLinkPackages,
1643 Opt_ReadUserPackageConf,
1651 Opt_PrintBindContents,
1656 ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
1657 -- The default -O0 options
1661 impliedFlags :: [(ExtensionFlag, TurnOnFlag, ExtensionFlag)]
1663 = [ (Opt_RankNTypes, turnOn, Opt_ExplicitForAll)
1664 , (Opt_Rank2Types, turnOn, Opt_ExplicitForAll)
1665 , (Opt_ScopedTypeVariables, turnOn, Opt_ExplicitForAll)
1666 , (Opt_LiberalTypeSynonyms, turnOn, Opt_ExplicitForAll)
1667 , (Opt_ExistentialQuantification, turnOn, Opt_ExplicitForAll)
1668 , (Opt_PolymorphicComponents, turnOn, Opt_ExplicitForAll)
1669 , (Opt_FlexibleInstances, turnOn, Opt_TypeSynonymInstances)
1671 , (Opt_RebindableSyntax, turnOff, Opt_ImplicitPrelude) -- NB: turn off!
1673 , (Opt_GADTs, turnOn, Opt_GADTSyntax)
1674 , (Opt_GADTs, turnOn, Opt_MonoLocalBinds)
1675 , (Opt_TypeFamilies, turnOn, Opt_MonoLocalBinds)
1677 , (Opt_TypeFamilies, turnOn, Opt_KindSignatures) -- Type families use kind signatures
1678 -- all over the place
1680 , (Opt_ImpredicativeTypes, turnOn, Opt_RankNTypes)
1682 -- Record wild-cards implies field disambiguation
1683 -- Otherwise if you write (C {..}) you may well get
1684 -- stuff like " 'a' not in scope ", which is a bit silly
1685 -- if the compiler has just filled in field 'a' of constructor 'C'
1686 , (Opt_RecordWildCards, turnOn, Opt_DisambiguateRecordFields)
1688 , (Opt_ParallelArrays, turnOn, Opt_ParallelListComp)
1691 optLevelFlags :: [([Int], DynFlag)]
1693 = [ ([0], Opt_IgnoreInterfacePragmas)
1694 , ([0], Opt_OmitInterfacePragmas)
1696 , ([1,2], Opt_IgnoreAsserts)
1697 , ([1,2], Opt_EnableRewriteRules) -- Off for -O0; see Note [Scoping for Builtin rules]
1699 , ([1,2], Opt_DoEtaReduction)
1700 , ([1,2], Opt_CaseMerge)
1701 , ([1,2], Opt_Strictness)
1703 , ([1,2], Opt_FullLaziness)
1704 , ([1,2], Opt_Specialise)
1705 , ([1,2], Opt_FloatIn)
1707 , ([2], Opt_LiberateCase)
1708 , ([2], Opt_SpecConstr)
1709 , ([2], Opt_RegsGraph)
1711 -- , ([2], Opt_StaticArgumentTransformation)
1712 -- Max writes: I think it's probably best not to enable SAT with -O2 for the
1713 -- 6.10 release. The version of SAT in HEAD at the moment doesn't incorporate
1714 -- several improvements to the heuristics, and I'm concerned that without
1715 -- those changes SAT will interfere with some attempts to write "high
1716 -- performance Haskell", as we saw in some posts on Haskell-Cafe earlier
1717 -- this year. In particular, the version in HEAD lacks the tail call
1718 -- criterion, so many things that look like reasonable loops will be
1719 -- turned into functions with extra (unneccesary) thunk creation.
1721 , ([0,1,2], Opt_DoLambdaEtaExpansion)
1722 -- This one is important for a tiresome reason:
1723 -- we want to make sure that the bindings for data
1724 -- constructors are eta-expanded. This is probably
1725 -- a good thing anyway, but it seems fragile.
1728 -- -----------------------------------------------------------------------------
1729 -- Standard sets of warning options
1731 standardWarnings :: [DynFlag]
1733 = [ Opt_WarnWarningsDeprecations,
1734 Opt_WarnDeprecatedFlags,
1735 Opt_WarnUnrecognisedPragmas,
1736 Opt_WarnOverlappingPatterns,
1737 Opt_WarnMissingFields,
1738 Opt_WarnMissingMethods,
1739 Opt_WarnDuplicateExports,
1740 Opt_WarnLazyUnliftedBindings,
1741 Opt_WarnDodgyForeignImports,
1742 Opt_WarnWrongDoBind,
1743 Opt_WarnAlternativeLayoutRuleTransitional
1746 minusWOpts :: [DynFlag]
1747 -- Things you get with -W
1749 = standardWarnings ++
1750 [ Opt_WarnUnusedBinds,
1751 Opt_WarnUnusedMatches,
1752 Opt_WarnUnusedImports,
1753 Opt_WarnIncompletePatterns,
1754 Opt_WarnDodgyExports,
1755 Opt_WarnDodgyImports
1758 minusWallOpts :: [DynFlag]
1759 -- Things you get with -Wall
1762 [ Opt_WarnTypeDefaults,
1763 Opt_WarnNameShadowing,
1764 Opt_WarnMissingSigs,
1767 Opt_WarnUnusedDoBind
1770 minuswRemovesOpts :: [DynFlag]
1771 -- minuswRemovesOpts should be every warning option
1775 Opt_WarnIncompletePatternsRecUpd,
1776 Opt_WarnIncompleteUniPatterns,
1777 Opt_WarnMonomorphism,
1778 Opt_WarnUnrecognisedPragmas,
1779 Opt_WarnAutoOrphans,
1780 Opt_WarnImplicitPrelude
1783 enableGlasgowExts :: DynP ()
1784 enableGlasgowExts = do setDynFlag Opt_PrintExplicitForalls
1785 mapM_ setExtensionFlag glasgowExtsFlags
1787 disableGlasgowExts :: DynP ()
1788 disableGlasgowExts = do unSetDynFlag Opt_PrintExplicitForalls
1789 mapM_ unSetExtensionFlag glasgowExtsFlags
1791 glasgowExtsFlags :: [ExtensionFlag]
1792 glasgowExtsFlags = [
1793 Opt_ForeignFunctionInterface
1794 , Opt_UnliftedFFITypes
1795 , Opt_ImplicitParams
1796 , Opt_ScopedTypeVariables
1798 , Opt_TypeSynonymInstances
1799 , Opt_StandaloneDeriving
1800 , Opt_DeriveDataTypeable
1802 , Opt_DeriveFoldable
1803 , Opt_DeriveTraversable
1804 , Opt_FlexibleContexts
1805 , Opt_FlexibleInstances
1806 , Opt_ConstrainedClassMethods
1807 , Opt_MultiParamTypeClasses
1808 , Opt_FunctionalDependencies
1810 , Opt_PolymorphicComponents
1811 , Opt_ExistentialQuantification
1813 , Opt_PostfixOperators
1815 , Opt_LiberalTypeSynonyms
1819 , Opt_ParallelListComp
1820 , Opt_EmptyDataDecls
1821 , Opt_KindSignatures
1822 , Opt_GeneralizedNewtypeDeriving ]
1825 -- Consult the RTS to find whether GHC itself has been built profiled
1826 -- If so, you can't use Template Haskell
1827 foreign import ccall unsafe "rts_isProfiled" rtsIsProfiledIO :: IO CInt
1829 rtsIsProfiled :: Bool
1830 rtsIsProfiled = unsafePerformIO rtsIsProfiledIO /= 0
1832 checkTemplateHaskellOk :: Bool -> DynP ()
1833 checkTemplateHaskellOk turn_on
1834 | turn_on && rtsIsProfiled
1835 = addErr "You can't use Template Haskell with a profiled compiler"
1839 -- In stage 1 we don't know that the RTS has rts_isProfiled,
1840 -- so we simply say "ok". It doesn't matter because TH isn't
1841 -- available in stage 1 anyway.
1842 checkTemplateHaskellOk turn_on = return ()
1845 {- **********************************************************************
1847 DynFlags constructors
1849 %********************************************************************* -}
1851 type DynP = EwM (CmdLineP DynFlags)
1853 upd :: (DynFlags -> DynFlags) -> DynP ()
1854 upd f = liftEwM (do { dfs <- getCmdLineState
1855 ; putCmdLineState $! (f dfs) })
1857 --------------- Constructor functions for OptKind -----------------
1858 noArg :: (DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1859 noArg fn = NoArg (upd fn)
1861 noArgDF :: (DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1862 noArgDF fn deprec = NoArg (upd fn >> deprecate deprec)
1864 hasArg :: (String -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1865 hasArg fn = HasArg (upd . fn)
1867 hasArgDF :: (String -> DynFlags -> DynFlags) -> String -> OptKind (CmdLineP DynFlags)
1868 hasArgDF fn deprec = HasArg (\s -> do { upd (fn s)
1869 ; deprecate deprec })
1871 intSuffix :: (Int -> DynFlags -> DynFlags) -> OptKind (CmdLineP DynFlags)
1872 intSuffix fn = IntSuffix (\n -> upd (fn n))
1874 setDumpFlag :: DynFlag -> OptKind (CmdLineP DynFlags)
1875 setDumpFlag dump_flag = NoArg (setDumpFlag' dump_flag)
1877 --------------------------
1878 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1879 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1880 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1882 --------------------------
1883 setExtensionFlag, unSetExtensionFlag :: ExtensionFlag -> DynP ()
1884 setExtensionFlag f = do { upd (\dfs -> xopt_set dfs f)
1887 deps = [ if turn_on then setExtensionFlag d
1888 else unSetExtensionFlag d
1889 | (f', turn_on, d) <- impliedFlags, f' == f ]
1890 -- When you set f, set the ones it implies
1891 -- NB: use setExtensionFlag recursively, in case the implied flags
1892 -- implies further flags
1894 unSetExtensionFlag f = upd (\dfs -> xopt_unset dfs f)
1895 -- When you un-set f, however, we don't un-set the things it implies
1896 -- (except for -fno-glasgow-exts, which is treated specially)
1898 --------------------------
1899 setDumpFlag' :: DynFlag -> DynP ()
1900 setDumpFlag' dump_flag
1901 = do { setDynFlag dump_flag
1902 ; when want_recomp forceRecompile }
1904 -- Certain dumpy-things are really interested in what's going
1905 -- on during recompilation checking, so in those cases we
1906 -- don't want to turn it off.
1907 want_recomp = dump_flag `notElem` [Opt_D_dump_if_trace,
1908 Opt_D_dump_hi_diffs]
1910 forceRecompile :: DynP ()
1911 -- Whenver we -ddump, force recompilation (by switching off the
1912 -- recompilation checker), else you don't see the dump! However,
1913 -- don't switch it off in --make mode, else *everything* gets
1914 -- recompiled which probably isn't what you want
1915 forceRecompile = do { dfs <- liftEwM getCmdLineState
1916 ; when (force_recomp dfs) (setDynFlag Opt_ForceRecomp) }
1918 force_recomp dfs = isOneShot (ghcMode dfs)
1920 setVerboseCore2Core :: DynP ()
1921 setVerboseCore2Core = do forceRecompile
1922 setDynFlag Opt_D_verbose_core2core
1923 upd (\dfs -> dfs { shouldDumpSimplPhase = Nothing })
1926 setDumpSimplPhases :: String -> DynP ()
1927 setDumpSimplPhases s = do forceRecompile
1928 upd (\dfs -> dfs { shouldDumpSimplPhase = Just spec })
1930 spec = case s of { ('=' : s') -> s'; _ -> s }
1932 setVerbosity :: Maybe Int -> DynP ()
1933 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1935 addCmdlineHCInclude :: String -> DynP ()
1936 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1938 extraPkgConf_ :: FilePath -> DynP ()
1939 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1941 exposePackage, exposePackageId, hidePackage, ignorePackage :: String -> DynP ()
1943 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1945 upd (\s -> s{ packageFlags = ExposePackageId p : packageFlags s })
1947 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1949 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1951 setPackageName :: String -> DynFlags -> DynFlags
1952 setPackageName p s = s{ thisPackage = stringToPackageId p }
1954 -- If we're linking a binary, then only targets that produce object
1955 -- code are allowed (requests for other target types are ignored).
1956 setTarget :: HscTarget -> DynP ()
1957 setTarget l = upd set
1960 | ghcLink dfs /= LinkBinary || isObjectTarget l = dfs{ hscTarget = l }
1963 -- Changes the target only if we're compiling object code. This is
1964 -- used by -fasm and -fvia-C, which switch from one to the other, but
1965 -- not from bytecode to object-code. The idea is that -fasm/-fvia-C
1966 -- can be safely used in an OPTIONS_GHC pragma.
1967 setObjTarget :: HscTarget -> DynP ()
1968 setObjTarget l = upd set
1971 | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
1974 setOptLevel :: Int -> DynFlags -> DynFlags
1975 setOptLevel n dflags
1976 | hscTarget dflags == HscInterpreted && n > 0
1978 -- not in IO any more, oh well:
1979 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1981 = updOptLevel n dflags
1984 -- -Odph is equivalent to
1986 -- -O2 optimise as much as possible
1987 -- -fmax-simplifier-iterations20 this is necessary sometimes
1988 -- -fsimplifier-phases=3 we use an additional simplifier phase for fusion
1990 setDPHOpt :: DynFlags -> DynFlags
1991 setDPHOpt dflags = setOptLevel 2 (dflags { maxSimplIterations = 20
1995 -- Determines the package used by the vectoriser for the symbols of the vectorised code.
1996 -- 'DPHNone' indicates that no data-parallel backend library is available; hence, the
1997 -- vectoriser cannot be used.
1999 data DPHBackend = DPHPar -- "dph-par"
2000 | DPHSeq -- "dph-seq"
2001 | DPHThis -- the currently compiled package
2002 | DPHNone -- no DPH library available
2003 deriving(Eq, Ord, Enum, Show)
2005 setDPHBackend :: DPHBackend -> DynP ()
2006 setDPHBackend backend = upd $ \dflags -> dflags { dphBackend = backend }
2008 -- Query the DPH backend package to be used by the vectoriser.
2010 dphPackage :: DynFlags -> PackageId
2012 = case dphBackend dflags of
2013 DPHPar -> dphParPackageId
2014 DPHSeq -> dphSeqPackageId
2015 DPHThis -> thisPackage dflags
2016 DPHNone -> ghcError (CmdLineError dphBackendError)
2018 dphBackendError :: String
2019 dphBackendError = "To use -fvectorise select a DPH backend with -fdph-par or -fdph-seq"
2021 setMainIs :: String -> DynP ()
2023 | not (null main_fn) && isLower (head main_fn)
2024 -- The arg looked like "Foo.Bar.baz"
2025 = upd $ \d -> d{ mainFunIs = Just main_fn,
2026 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
2028 | isUpper (head arg) -- The arg looked like "Foo" or "Foo.Bar"
2029 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName arg) }
2031 | otherwise -- The arg looked like "baz"
2032 = upd $ \d -> d{ mainFunIs = Just arg }
2034 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
2036 -----------------------------------------------------------------------------
2037 -- Paths & Libraries
2039 addImportPath, addLibraryPath, addIncludePath, addFrameworkPath :: FilePath -> DynP ()
2041 -- -i on its own deletes the import paths
2042 addImportPath "" = upd (\s -> s{importPaths = []})
2043 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
2047 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
2050 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
2052 addFrameworkPath p =
2053 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
2055 #ifndef mingw32_TARGET_OS
2056 split_marker :: Char
2057 split_marker = ':' -- not configurable (ToDo)
2060 splitPathList :: String -> [String]
2061 splitPathList s = filter notNull (splitUp s)
2062 -- empty paths are ignored: there might be a trailing
2063 -- ':' in the initial list, for example. Empty paths can
2064 -- cause confusion when they are translated into -I options
2065 -- for passing to gcc.
2067 #ifndef mingw32_TARGET_OS
2068 splitUp xs = split split_marker xs
2070 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
2072 -- That is, if "foo:bar:baz" is used, this interpreted as
2073 -- consisting of three entries, 'foo', 'bar', 'baz'.
2074 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
2075 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
2077 -- Notice that no attempt is made to fully replace the 'standard'
2078 -- split marker ':' with the Windows / DOS one, ';'. The reason being
2079 -- that this will cause too much breakage for users & ':' will
2080 -- work fine even with DOS paths, if you're not insisting on being silly.
2083 splitUp (x:':':div:xs) | div `elem` dir_markers
2084 = ((x:':':div:p): splitUp rs)
2086 (p,rs) = findNextPath xs
2087 -- we used to check for existence of the path here, but that
2088 -- required the IO monad to be threaded through the command-line
2089 -- parser which is quite inconvenient. The
2090 splitUp xs = cons p (splitUp rs)
2092 (p,rs) = findNextPath xs
2097 -- will be called either when we've consumed nought or the
2098 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
2099 -- finding the next split marker.
2101 case break (`elem` split_markers) xs of
2102 (p, _:ds) -> (p, ds)
2105 split_markers :: [Char]
2106 split_markers = [':', ';']
2108 dir_markers :: [Char]
2109 dir_markers = ['/', '\\']
2112 -- -----------------------------------------------------------------------------
2113 -- tmpDir, where we store temporary files.
2115 setTmpDir :: FilePath -> DynFlags -> DynFlags
2116 setTmpDir dir dflags = dflags{ tmpDir = normalise dir }
2117 -- we used to fix /cygdrive/c/.. on Windows, but this doesn't
2118 -- seem necessary now --SDM 7/2/2008
2120 -----------------------------------------------------------------------------
2123 setRtsOpts :: String -> DynP ()
2124 setRtsOpts arg = upd $ \ d -> d {rtsOpts = Just arg}
2126 setRtsOptsEnabled :: RtsOptsEnabled -> DynP ()
2127 setRtsOptsEnabled arg = upd $ \ d -> d {rtsOptsEnabled = arg}
2129 -----------------------------------------------------------------------------
2132 setOptHpcDir :: String -> DynP ()
2133 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
2135 -----------------------------------------------------------------------------
2136 -- Via-C compilation stuff
2138 -- There are some options that we need to pass to gcc when compiling
2139 -- Haskell code via C, but are only supported by recent versions of
2140 -- gcc. The configure script decides which of these options we need,
2141 -- and puts them in the file "extra-gcc-opts" in $topdir, which is
2142 -- read before each via-C compilation. The advantage of having these
2143 -- in a separate file is that the file can be created at install-time
2144 -- depending on the available gcc version, and even re-generated later
2145 -- if gcc is upgraded.
2147 -- The options below are not dependent on the version of gcc, only the
2150 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
2151 [String]) -- for registerised HC compilations
2152 machdepCCOpts dflags = let (flagsAll, flagsRegHc) = machdepCCOpts' dflags
2153 in (cCcOpts ++ flagsAll, flagsRegHc)
2155 machdepCCOpts' :: DynFlags -> ([String], -- flags for all C compilations
2156 [String]) -- for registerised HC compilations
2157 machdepCCOpts' _dflags
2158 #if alpha_TARGET_ARCH
2160 #ifdef HAVE_THREADED_RTS_SUPPORT
2164 -- For now, to suppress the gcc warning "call-clobbered
2165 -- register used for global register variable", we simply
2166 -- disable all warnings altogether using the -w flag. Oh well.
2168 #elif hppa_TARGET_ARCH
2169 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
2170 -- (very nice, but too bad the HP /usr/include files don't agree.)
2171 = ( ["-D_HPUX_SOURCE"], [] )
2173 #elif m68k_TARGET_ARCH
2174 -- -fno-defer-pop : for the .hc files, we want all the pushing/
2175 -- popping of args to routines to be explicit; if we let things
2176 -- be deferred 'til after an STGJUMP, imminent death is certain!
2178 -- -fomit-frame-pointer : *don't*
2179 -- It's better to have a6 completely tied up being a frame pointer
2180 -- rather than let GCC pick random things to do with it.
2181 -- (If we want to steal a6, then we would try to do things
2182 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
2183 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
2185 #elif i386_TARGET_ARCH
2186 -- -fno-defer-pop : basically the same game as for m68k
2188 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
2189 -- the fp (%ebp) for our register maps.
2190 = let n_regs = stolen_x86_regs _dflags
2193 [ if opt_Static then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
2196 "-fomit-frame-pointer",
2197 -- we want -fno-builtin, because when gcc inlines
2198 -- built-in functions like memcpy() it tends to
2199 -- run out of registers, requiring -monly-n-regs
2201 "-DSTOLEN_X86_REGS="++show n_regs ]
2204 #elif ia64_TARGET_ARCH
2205 = ( [], ["-fomit-frame-pointer", "-G0"] )
2207 #elif x86_64_TARGET_ARCH
2210 ["-fomit-frame-pointer",
2211 "-fno-asynchronous-unwind-tables",
2212 -- the unwind tables are unnecessary for HC code,
2213 -- and get in the way of -split-objs. Another option
2214 -- would be to throw them away in the mangler, but this
2217 -- calling builtins like strlen() using the FFI can
2218 -- cause gcc to run out of regs, so use the external
2222 #elif sparc_TARGET_ARCH
2224 -- For now, to suppress the gcc warning "call-clobbered
2225 -- register used for global register variable", we simply
2226 -- disable all warnings altogether using the -w flag. Oh well.
2228 #elif powerpc_apple_darwin_TARGET
2230 -- Disable Apple's precompiling preprocessor. It's a great thing
2231 -- for "normal" programs, but it doesn't support register variable
2233 = ( [], ["-no-cpp-precomp"] )
2238 picCCOpts :: DynFlags -> [String]
2240 #if darwin_TARGET_OS
2241 -- Apple prefers to do things the other way round.
2242 -- PIC is on by default.
2243 -- -mdynamic-no-pic:
2244 -- Turn off PIC code generation.
2246 -- Don't generate "common" symbols - these are unwanted
2247 -- in dynamic libraries.
2250 = ["-fno-common", "-U __PIC__","-D__PIC__"]
2252 = ["-mdynamic-no-pic"]
2253 #elif mingw32_TARGET_OS
2254 -- no -fPIC for Windows
2256 = ["-U __PIC__","-D__PIC__"]
2260 -- we need -fPIC for C files when we are compiling with -dynamic,
2261 -- otherwise things like stub.c files don't get compiled
2262 -- correctly. They need to reference data in the Haskell
2263 -- objects, but can't without -fPIC. See
2264 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/PositionIndependentCode
2265 | opt_PIC || not opt_Static
2266 = ["-fPIC", "-U __PIC__", "-D__PIC__"]
2271 -- -----------------------------------------------------------------------------
2275 can_split = cSplitObjs == "YES"
2277 -- -----------------------------------------------------------------------------
2280 data Printable = String String
2281 | FromDynFlags (DynFlags -> String)
2283 compilerInfo :: [(String, Printable)]
2284 compilerInfo = [("Project name", String cProjectName),
2285 ("Project version", String cProjectVersion),
2286 ("Booter version", String cBooterVersion),
2287 ("Stage", String cStage),
2288 ("Build platform", String cBuildPlatformString),
2289 ("Host platform", String cHostPlatformString),
2290 ("Target platform", String cTargetPlatformString),
2291 ("Have interpreter", String cGhcWithInterpreter),
2292 ("Object splitting", String cSplitObjs),
2293 ("Have native code generator", String cGhcWithNativeCodeGen),
2294 ("Support SMP", String cGhcWithSMP),
2295 ("Unregisterised", String cGhcUnregisterised),
2296 ("Tables next to code", String cGhcEnableTablesNextToCode),
2297 ("RTS ways", String cGhcRTSWays),
2298 ("Leading underscore", String cLeadingUnderscore),
2299 ("Debug on", String (show debugIsOn)),
2300 ("LibDir", FromDynFlags topDir),
2301 ("Global Package DB", FromDynFlags systemPackageConfig),
2302 ("C compiler flags", String (show cCcOpts)),
2303 ("Gcc Linker flags", String (show cGccLinkerOpts)),
2304 ("Ld Linker flags", String (show cLdLinkerOpts))