DynFlags.hs 114 KB
Newer Older
dterei's avatar
dterei committed
1
-------------------------------------------------------------------------------
2
--
dterei's avatar
dterei committed
3
4
5
6
7
8
-- | Dynamic flags
--
-- Most flags are dynamic flags, which means they can change from compilation
-- to compilation using @OPTIONS_GHC@ pragmas, and in a multi-session GHC each
-- session can be using different dynamic flags. Dynamic flags can also be set
-- at the prompt in GHCi.
9
10
11
--
-- (c) The University of Glasgow 2005
--
dterei's avatar
dterei committed
12
-------------------------------------------------------------------------------
13
14

module DynFlags (
15
        -- * Dynamic flags and associated configuration types
Ian Lynagh's avatar
Ian Lynagh committed
16
        DynFlag(..),
17
        WarningFlag(..),
18
        ExtensionFlag(..),
19
        Language(..),
Ian Lynagh's avatar
Ian Lynagh committed
20
        FatalMessager, LogAction, FlushOut(..), FlushErr(..),
21
        ProfAuto(..),
22
        glasgowExtsFlags,
23
24
25
        dopt,
        dopt_set,
        dopt_unset,
26
27
28
        wopt,
        wopt_set,
        wopt_unset,
29
30
31
        xopt,
        xopt_set,
        xopt_unset,
32
        lang_set,
Ian Lynagh's avatar
Ian Lynagh committed
33
        DynFlags(..),
Ian Lynagh's avatar
Ian Lynagh committed
34
        HasDynFlags(..), ContainsDynFlags(..),
Ian Lynagh's avatar
Ian Lynagh committed
35
        RtsOptsEnabled(..),
Ian Lynagh's avatar
Ian Lynagh committed
36
        HscTarget(..), isObjectTarget, defaultObjectTarget,
37
        targetRetainsAllBindings,
Ian Lynagh's avatar
Ian Lynagh committed
38
39
40
        GhcMode(..), isOneShot,
        GhcLink(..), isNoLink,
        PackageFlag(..),
41
        PkgConfRef(..),
Ian Lynagh's avatar
Ian Lynagh committed
42
        Option(..), showOpt,
Ian Lynagh's avatar
Ian Lynagh committed
43
        DynLibLoader(..),
44
        fFlags, fWarningFlags, fLangFlags, xFlags,
45
        wayNames, dynFlagDependencies,
46

47
48
        printOutputForUser, printInfoForUser,

49
        -- ** Safe Haskell
50
        SafeHaskellMode(..),
51
        safeHaskellOn, safeImportsOn, safeLanguageOn, safeInferOn,
52
        packageTrustOn,
53
        safeDirectImpsReq, safeImplicitImpsReq,
54
        unsafeFlags,
55

56
        -- ** System tool settings and locations
57
        Settings(..),
58
        targetPlatform,
59
60
61
62
        ghcUsagePath, ghciUsagePath, topDir, tmpDir, rawSettings,
        extraGccViaCFlags, systemPackageConfig,
        pgm_L, pgm_P, pgm_F, pgm_c, pgm_s, pgm_a, pgm_l, pgm_dll, pgm_T,
        pgm_sysman, pgm_windres, pgm_lo, pgm_lc,
Ian Lynagh's avatar
Ian Lynagh committed
63
        opt_L, opt_P, opt_F, opt_c, opt_a, opt_l,
64
        opt_windres, opt_lo, opt_lc,
65
66


67
        -- ** Manipulating DynFlags
68
        defaultDynFlags,                -- Settings -> DynFlags
Ian Lynagh's avatar
Ian Lynagh committed
69
        initDynFlags,                   -- DynFlags -> IO DynFlags
Ian Lynagh's avatar
Ian Lynagh committed
70
        defaultFatalMessager,
71
        defaultLogAction,
72
        defaultLogActionHPrintDoc,
73
74
        defaultFlushOut,
        defaultFlushErr,
Ian Lynagh's avatar
Ian Lynagh committed
75

76
        getOpts,                        -- DynFlags -> (DynFlags -> [a]) -> [a]
77
        getVerbFlags,
Ian Lynagh's avatar
Ian Lynagh committed
78
79
80
        updOptLevel,
        setTmpDir,
        setPackageName,
81
        doingTickyProfiling,
Ian Lynagh's avatar
Ian Lynagh committed
82

83
        -- ** Parsing DynFlags
84
85
        parseDynamicFlagsCmdLine,
        parseDynamicFilePragma,
86
        allFlags,
87

88
        supportedLanguagesAndExtensions,
89
90

        -- ** DynFlag C compiler options
91
        picCCOpts,
92
93
94
95
96
97

        -- * Configuration of the stg-to-stg passes
        StgToDo(..),
        getStgToDo,

        -- * Compiler configuration suitable for display to the user
98
99
        compilerInfo,

100
#ifdef GHCI
dterei's avatar
dterei committed
101
-- Only in stage 2 can we be sure that the RTS
102
-- exposes the appropriate runtime boolean
103
        rtsIsProfiled,
104
#endif
105
106
        -- ** Only for use in the tracing functions in Outputable
        tracingDynFlags,
107
108
109
110
  ) where

#include "HsVersions.h"

111
import Platform
112
import Module
Simon Marlow's avatar
Simon Marlow committed
113
import PackageConfig
114
import PrelNames        ( mAIN )
115
import StaticFlags
116
import {-# SOURCE #-} Packages (PackageState)
Ian Lynagh's avatar
Ian Lynagh committed
117
import DriverPhases     ( Phase(..), phaseInputExt )
118
119
import Config
import CmdLineParser
Ian Lynagh's avatar
Ian Lynagh committed
120
import Constants        ( mAX_CONTEXT_REDUCTION_DEPTH )
121
import Panic
122
import Util
123
import Maybes           ( orElse )
124
import qualified Pretty
125
import SrcLoc
126
import FastString
Simon Marlow's avatar
Simon Marlow committed
127
import Outputable
Ian Lynagh's avatar
Ian Lynagh committed
128
#ifdef GHCI
Ian Lynagh's avatar
Ian Lynagh committed
129
import Foreign.C        ( CInt(..) )
Ian Lynagh's avatar
Ian Lynagh committed
130
#endif
131
import {-# SOURCE #-} ErrUtils ( Severity(..), MsgDoc, mkLocMessage )
132

Ian Lynagh's avatar
Ian Lynagh committed
133
#ifdef GHCI
134
import System.IO.Unsafe ( unsafePerformIO )
Ian Lynagh's avatar
Ian Lynagh committed
135
#endif
136
import Data.IORef
Ian Lynagh's avatar
Ian Lynagh committed
137
import Control.Monad    ( when )
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
138

139
import Data.Char
140
import Data.List
141
142
import Data.Map (Map)
import qualified Data.Map as Map
143
144
import Data.Set (Set)
import qualified Data.Set as Set
Ian Lynagh's avatar
Ian Lynagh committed
145
import System.FilePath
146
import System.IO
147

148
149
150
import Data.IntSet (IntSet)
import qualified Data.IntSet as IntSet

151
152
153
-- -----------------------------------------------------------------------------
-- DynFlags

154
-- | Enumerates the simple on-or-off dynamic flags
155
156
157
158
data DynFlag

   -- debugging flags
   = Opt_D_dump_cmm
159
   | Opt_D_dump_raw_cmm
160
   | Opt_D_dump_cmmz
161
   | Opt_D_dump_cmmz_pretty
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
   -- All of the cmmz subflags (there are a lot!)  Automatically
   -- enabled if you run -ddump-cmmz
   | Opt_D_dump_cmmz_cbe
   | Opt_D_dump_cmmz_proc
   | Opt_D_dump_cmmz_spills
   | Opt_D_dump_cmmz_rewrite
   | Opt_D_dump_cmmz_dead
   | Opt_D_dump_cmmz_stub
   | Opt_D_dump_cmmz_sp
   | Opt_D_dump_cmmz_procmap
   | Opt_D_dump_cmmz_split
   | Opt_D_dump_cmmz_lower
   | Opt_D_dump_cmmz_info
   | Opt_D_dump_cmmz_cafs
   -- end cmmz subflags
177
   | Opt_D_dump_cps_cmm
178
   | Opt_D_dump_cvt_cmm
179
   | Opt_D_dump_asm
180
181
   | Opt_D_dump_asm_native
   | Opt_D_dump_asm_liveness
182
   | Opt_D_dump_asm_coalesce
183
184
185
   | Opt_D_dump_asm_regalloc
   | Opt_D_dump_asm_regalloc_stages
   | Opt_D_dump_asm_conflicts
186
   | Opt_D_dump_asm_stats
187
   | Opt_D_dump_asm_expanded
188
   | Opt_D_dump_llvm
189
   | Opt_D_dump_core_stats
190
191
192
193
194
195
   | Opt_D_dump_cpranal
   | Opt_D_dump_deriv
   | Opt_D_dump_ds
   | Opt_D_dump_flatC
   | Opt_D_dump_foreign
   | Opt_D_dump_inlinings
196
   | Opt_D_dump_rule_firings
197
   | Opt_D_dump_rule_rewrites
198
199
200
   | Opt_D_dump_occur_anal
   | Opt_D_dump_parsed
   | Opt_D_dump_rn
201
   | Opt_D_dump_core_pipeline -- TODO FIXME: dump after simplifier stats
202
203
   | Opt_D_dump_simpl
   | Opt_D_dump_simpl_iterations
204
   | Opt_D_dump_simpl_phases
205
206
207
208
209
210
211
212
213
214
215
216
217
   | Opt_D_dump_spec
   | Opt_D_dump_prep
   | Opt_D_dump_stg
   | Opt_D_dump_stranal
   | Opt_D_dump_tc
   | Opt_D_dump_types
   | Opt_D_dump_rules
   | Opt_D_dump_cse
   | Opt_D_dump_worker_wrapper
   | Opt_D_dump_rn_trace
   | Opt_D_dump_rn_stats
   | Opt_D_dump_opt_cmm
   | Opt_D_dump_simpl_stats
218
   | Opt_D_dump_cs_trace -- Constraint solver in type checker
219
220
   | Opt_D_dump_tc_trace
   | Opt_D_dump_if_trace
221
   | Opt_D_dump_vt_trace
222
223
224
   | Opt_D_dump_splices
   | Opt_D_dump_BCOs
   | Opt_D_dump_vect
225
   | Opt_D_dump_avoid_vect
226
   | Opt_D_dump_ticked
pepe's avatar
pepe committed
227
   | Opt_D_dump_rtti
228
229
230
231
232
233
   | Opt_D_source_stats
   | Opt_D_verbose_core2core
   | Opt_D_verbose_stg2stg
   | Opt_D_dump_hi
   | Opt_D_dump_hi_diffs
   | Opt_D_dump_minimal_imports
234
   | Opt_D_dump_mod_cycles
235
   | Opt_D_dump_view_pattern_commoning
236
   | Opt_D_faststring_stats
Ian Lynagh's avatar
Ian Lynagh committed
237
   | Opt_DumpToFile                     -- ^ Append dump output to files instead of stdout.
Simon Marlow's avatar
Simon Marlow committed
238
   | Opt_D_no_debug_output
239
240
241
   | Opt_DoCoreLinting
   | Opt_DoStgLinting
   | Opt_DoCmmLinting
Ben.Lippmeier@anu.edu.au's avatar
Ben.Lippmeier@anu.edu.au committed
242
   | Opt_DoAsmLinting
243
   | Opt_NoLlvmMangler                 -- hidden flag
244

Ian Lynagh's avatar
Ian Lynagh committed
245
   | Opt_WarnIsError                    -- -Werror; makes warnings fatal
246

247
248
   | Opt_PrintExplicitForalls

249
250
251
   -- optimisation opts
   | Opt_Strictness
   | Opt_FullLaziness
252
253
   | Opt_FloatIn
   | Opt_Specialise
254
   | Opt_StaticArgumentTransformation
255
   | Opt_CSE
256
257
   | Opt_LiberateCase
   | Opt_SpecConstr
258
259
260
261
262
   | Opt_DoLambdaEtaExpansion
   | Opt_IgnoreAsserts
   | Opt_DoEtaReduction
   | Opt_CaseMerge
   | Opt_UnboxStrictFields
263
   | Opt_DictsCheap
264
   | Opt_EnableRewriteRules             -- Apply rewrite rules during simplification
rl@cse.unsw.edu.au's avatar
rl@cse.unsw.edu.au committed
265
   | Opt_Vectorise
chak@cse.unsw.edu.au.'s avatar
chak@cse.unsw.edu.au. committed
266
   | Opt_AvoidVect
Ian Lynagh's avatar
Ian Lynagh committed
267
268
   | Opt_RegsGraph                      -- do graph coloring register allocation
   | Opt_RegsIterative                  -- do iterative coalescing graph coloring register allocation
269
   | Opt_PedanticBottoms                -- Be picky about how we treat bottom
270
271
   | Opt_LlvmTBAA                       -- Use LLVM TBAA infastructure for improving AA (hidden flag)
   | Opt_RegLiveness                    -- Use the STG Reg liveness information (hidden flag)
272

273
274
275
276
277
   -- Interface files
   | Opt_IgnoreInterfacePragmas
   | Opt_OmitInterfacePragmas
   | Opt_ExposeAllUnfoldings

Ian Lynagh's avatar
Ian Lynagh committed
278
279
   -- profiling opts
   | Opt_AutoSccsOnIndividualCafs
280
   | Opt_ProfCountEntries
Ian Lynagh's avatar
Ian Lynagh committed
281

282
283
   -- misc opts
   | Opt_Pp
284
   | Opt_ForceRecomp
285
   | Opt_ExcessPrecision
286
   | Opt_EagerBlackHoling
287
288
289
   | Opt_NoHsMain
   | Opt_SplitObjs
   | Opt_StgStats
290
   | Opt_HideAllPackages
291
   | Opt_PrintBindResult
292
   | Opt_Haddock
David Waern's avatar
David Waern committed
293
   | Opt_HaddockOptions
294
   | Opt_Hpc_No_Auto
295
   | Opt_BreakOnException
296
   | Opt_BreakOnError
297
   | Opt_PrintEvldWithShow
298
   | Opt_PrintBindContents
299
300
   | Opt_GenManifest
   | Opt_EmbedManifest
301
   | Opt_EmitExternalCore
Ian Lynagh's avatar
Ian Lynagh committed
302
   | Opt_SharedImplib
303
   | Opt_BuildingCabalPackage
304
   | Opt_SSE2
tibbe's avatar
tibbe committed
305
   | Opt_SSE4_2
306
   | Opt_GhciSandbox
Ian Lynagh's avatar
Ian Lynagh committed
307
   | Opt_GhciHistory
308
   | Opt_HelpfulErrors
309
   | Opt_DeferTypeErrors
310

311
   -- temporary flags
312
   | Opt_RunCPS
313
   | Opt_RunCPSZ
314
   | Opt_AutoLinkPackages
315
   | Opt_ImplicitImportQualified
316
   | Opt_TryNewCodeGen
317
318
319
320
321
322

   -- keeping stuff
   | Opt_KeepHiDiffs
   | Opt_KeepHcFiles
   | Opt_KeepSFiles
   | Opt_KeepTmpFiles
Jedai's avatar
Jedai committed
323
   | Opt_KeepRawTokenStream
324
   | Opt_KeepLlvmFiles
325

326
   -- safe haskell flags
dterei's avatar
dterei committed
327
   | Opt_DistrustAllPackages
328
329
   | Opt_PackageTrust

330
   deriving (Eq, Show, Enum)
Ian Lynagh's avatar
Ian Lynagh committed
331

332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
data WarningFlag =
     Opt_WarnDuplicateExports
   | Opt_WarnHiShadows
   | Opt_WarnImplicitPrelude
   | Opt_WarnIncompletePatterns
   | Opt_WarnIncompleteUniPatterns
   | Opt_WarnIncompletePatternsRecUpd
   | Opt_WarnMissingFields
   | Opt_WarnMissingImportList
   | Opt_WarnMissingMethods
   | Opt_WarnMissingSigs
   | Opt_WarnMissingLocalSigs
   | Opt_WarnNameShadowing
   | Opt_WarnOverlappingPatterns
   | Opt_WarnTypeDefaults
   | Opt_WarnMonomorphism
   | Opt_WarnUnusedBinds
   | Opt_WarnUnusedImports
   | Opt_WarnUnusedMatches
   | Opt_WarnWarningsDeprecations
   | Opt_WarnDeprecatedFlags
   | Opt_WarnDodgyExports
   | Opt_WarnDodgyImports
   | Opt_WarnOrphans
   | Opt_WarnAutoOrphans
   | Opt_WarnIdentities
   | Opt_WarnTabs
   | Opt_WarnUnrecognisedPragmas
   | Opt_WarnDodgyForeignImports
   | Opt_WarnLazyUnliftedBindings
   | Opt_WarnUnusedDoBind
   | Opt_WarnWrongDoBind
   | Opt_WarnAlternativeLayoutRuleTransitional
365
366
   | Opt_WarnUnsafe
   | Opt_WarnSafe
Ian Lynagh's avatar
Ian Lynagh committed
367
   | Opt_WarnPointlessPragmas
368
   | Opt_WarnUnsupportedCallingConventions
369
   deriving (Eq, Show, Enum)
370

371
data Language = Haskell98 | Haskell2010
372
   deriving Enum
373

374
-- | The various Safe Haskell modes
375
376
data SafeHaskellMode
   = Sf_None
dterei's avatar
dterei committed
377
   | Sf_Unsafe
378
379
   | Sf_Trustworthy
   | Sf_Safe
380
   | Sf_SafeInferred
381
382
   deriving (Eq)

Ian Lynagh's avatar
Ian Lynagh committed
383
instance Show SafeHaskellMode where
Ian Lynagh's avatar
Ian Lynagh committed
384
385
386
387
388
    show Sf_None         = "None"
    show Sf_Unsafe       = "Unsafe"
    show Sf_Trustworthy  = "Trustworthy"
    show Sf_Safe         = "Safe"
    show Sf_SafeInferred = "Safe-Inferred"
Ian Lynagh's avatar
Ian Lynagh committed
389

390
instance Outputable SafeHaskellMode where
Ian Lynagh's avatar
Ian Lynagh committed
391
    ppr = text . show
392

393
data ExtensionFlag
394
395
396
397
398
399
400
   = Opt_Cpp
   | Opt_OverlappingInstances
   | Opt_UndecidableInstances
   | Opt_IncoherentInstances
   | Opt_MonomorphismRestriction
   | Opt_MonoPatBinds
   | Opt_MonoLocalBinds
401
402
   | Opt_RelaxedPolyRec           -- Deprecated
   | Opt_ExtendedDefaultRules     -- Use GHC's extended rules for defaulting
403
404
   | Opt_ForeignFunctionInterface
   | Opt_UnliftedFFITypes
405
   | Opt_InterruptibleFFI
406
   | Opt_CApiFFI
407
   | Opt_GHCForeignImportPrim
408
409
   | Opt_ParallelArrays           -- Syntactic support for parallel arrays
   | Opt_Arrows                   -- Arrow-notation syntax
410
411
412
413
414
415
416
417
418
419
420
421
422
423
   | Opt_TemplateHaskell
   | Opt_QuasiQuotes
   | Opt_ImplicitParams
   | Opt_ImplicitPrelude
   | Opt_ScopedTypeVariables
   | Opt_UnboxedTuples
   | Opt_BangPatterns
   | Opt_TypeFamilies
   | Opt_OverloadedStrings
   | Opt_DisambiguateRecordFields
   | Opt_RecordWildCards
   | Opt_RecordPuns
   | Opt_ViewPatterns
   | Opt_GADTs
Ian Lynagh's avatar
Ian Lynagh committed
424
   | Opt_GADTSyntax
425
   | Opt_NPlusKPatterns
Ian Lynagh's avatar
Ian Lynagh committed
426
   | Opt_DoAndIfThenElse
427
   | Opt_RebindableSyntax
428
   | Opt_ConstraintKinds
dreixel's avatar
dreixel committed
429
   | Opt_PolyKinds                -- Kind polymorphism
dreixel's avatar
dreixel committed
430
   | Opt_DataKinds                -- Datatype promotion
431
432
   | Opt_InstanceSigs
 
433
434
435
436
437
   | Opt_StandaloneDeriving
   | Opt_DeriveDataTypeable
   | Opt_DeriveFunctor
   | Opt_DeriveTraversable
   | Opt_DeriveFoldable
438
   | Opt_DeriveGeneric            -- Allow deriving Generic/1
dreixel's avatar
dreixel committed
439
   | Opt_DefaultSignatures        -- Allow extra signatures for defmeths
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454

   | Opt_TypeSynonymInstances
   | Opt_FlexibleContexts
   | Opt_FlexibleInstances
   | Opt_ConstrainedClassMethods
   | Opt_MultiParamTypeClasses
   | Opt_FunctionalDependencies
   | Opt_UnicodeSyntax
   | Opt_PolymorphicComponents
   | Opt_ExistentialQuantification
   | Opt_MagicHash
   | Opt_EmptyDataDecls
   | Opt_KindSignatures
   | Opt_ParallelListComp
   | Opt_TransformListComp
455
   | Opt_MonadComprehensions
456
457
458
459
460
461
462
463
464
465
   | Opt_GeneralizedNewtypeDeriving
   | Opt_RecursiveDo
   | Opt_PostfixOperators
   | Opt_TupleSections
   | Opt_PatternGuards
   | Opt_LiberalTypeSynonyms
   | Opt_Rank2Types
   | Opt_RankNTypes
   | Opt_ImpredicativeTypes
   | Opt_TypeOperators
466
   | Opt_ExplicitNamespaces
467
468
469
470
471
   | Opt_PackageImports
   | Opt_ExplicitForAll
   | Opt_AlternativeLayoutRule
   | Opt_AlternativeLayoutRuleTransitional
   | Opt_DatatypeContexts
472
   | Opt_NondecreasingIndentation
473
   | Opt_RelaxedLayout
474
   | Opt_TraditionalRecordSyntax
475
   deriving (Eq, Enum, Show)
476

477
478
-- | Contains not only a collection of 'DynFlag's but also a plethora of
-- information relating to the compilation of a single file or GHC session
479
data DynFlags = DynFlags {
Ian Lynagh's avatar
Ian Lynagh committed
480
481
482
  ghcMode               :: GhcMode,
  ghcLink               :: GhcLink,
  hscTarget             :: HscTarget,
483
  settings              :: Settings,
484
  hscOutName            :: String,      -- ^ Name of the output file
485
  extCoreName           :: String,      -- ^ Name of the .hcr output file
486
  verbosity             :: Int,         -- ^ Verbosity level: see Note [Verbosity levels]
487
488
489
  optLevel              :: Int,         -- ^ Optimisation level
  simplPhases           :: Int,         -- ^ Number of simplifier phases
  maxSimplIterations    :: Int,         -- ^ Max simplifier iterations
490
  shouldDumpSimplPhase  :: Maybe String,
Ian Lynagh's avatar
Ian Lynagh committed
491
  ruleCheck             :: Maybe String,
492
  strictnessBefore      :: [Int],       -- ^ Additional demand analysis
493

494
  simplTickFactor       :: Int,         -- ^ Multiplier for simplifier ticks
495
496
497
  specConstrThreshold   :: Maybe Int,   -- ^ Threshold for SpecConstr
  specConstrCount       :: Maybe Int,   -- ^ Max number of specialisations for any one function
  liberateCaseThreshold :: Maybe Int,   -- ^ Threshold for LiberateCase
498
  floatLamArgs          :: Maybe Int,   -- ^ Arg count for lambda floating
499
                                        --   See CoreMonad.FloatOutSwitches
500

501
  cmdlineHcIncludes     :: [String],    -- ^ @\-\#includes@
Ian Lynagh's avatar
Ian Lynagh committed
502
503
504
  importPaths           :: [FilePath],
  mainModIs             :: Module,
  mainFunIs             :: Maybe String,
505
  ctxtStkDepth          :: Int,         -- ^ Typechecker context stack depth
506

507
  thisPackage           :: PackageId,   -- ^ name of package currently being compiled
508
509

  -- ways
510
  ways                  :: [Way],       -- ^ Way flags from the command line
511
512
  buildTag              :: String,      -- ^ The global \"way\" (e.g. \"p\" for prof)
  rtsBuildTag           :: String,      -- ^ The RTS \"way\"
Ian Lynagh's avatar
Ian Lynagh committed
513

514
515
516
  -- For object splitting
  splitInfo             :: Maybe (String,Int),

517
  -- paths etc.
Ian Lynagh's avatar
Ian Lynagh committed
518
  objectDir             :: Maybe String,
519
  dylibInstallName      :: Maybe String,
Ian Lynagh's avatar
Ian Lynagh committed
520
521
  hiDir                 :: Maybe String,
  stubDir               :: Maybe String,
522
  dumpDir               :: Maybe String,
523

Ian Lynagh's avatar
Ian Lynagh committed
524
525
526
  objectSuf             :: String,
  hcSuf                 :: String,
  hiSuf                 :: String,
527

Ian Lynagh's avatar
Ian Lynagh committed
528
529
530
  outputFile            :: Maybe String,
  outputHi              :: Maybe String,
  dynLibLoader          :: DynLibLoader,
531

532
  -- | This is set by 'DriverPipeline.runPipeline' based on where
Ian Lynagh's avatar
Ian Lynagh committed
533
534
  --    its output is going.
  dumpPrefix            :: Maybe FilePath,
535

536
537
  -- | Override the 'dumpPrefix' set by 'DriverPipeline.runPipeline'.
  --    Set by @-ddump-file-prefix@
Ian Lynagh's avatar
Ian Lynagh committed
538
539
540
541
542
543
544
  dumpPrefixForce       :: Maybe FilePath,

  includePaths          :: [String],
  libraryPaths          :: [String],
  frameworkPaths        :: [String],    -- used on darwin only
  cmdlineFrameworks     :: [String],    -- ditto

545
  rtsOpts               :: Maybe String,
Ian Lynagh's avatar
Ian Lynagh committed
546
  rtsOptsEnabled        :: RtsOptsEnabled,
547

548
  hpcDir                :: String,      -- ^ Path to store the .mix files
andy@galois.com's avatar
andy@galois.com committed
549

550
551
552
553
  -- Plugins
  pluginModNames        :: [ModuleName],
  pluginModNameOpts     :: [(ModuleName,String)],

554
555
556
557
558
559
  --  For ghc -M
  depMakefile           :: FilePath,
  depIncludePkgDeps     :: Bool,
  depExcludeMods        :: [ModuleName],
  depSuffixes           :: [String],

560
  --  Package flags
561
  extraPkgConfs         :: [PkgConfRef] -> [PkgConfRef],
562
        -- ^ The @-package-db@ flags given on the command line, in the order
Ian Lynagh's avatar
Ian Lynagh committed
563
        -- they appeared.
564

Ian Lynagh's avatar
Ian Lynagh committed
565
  packageFlags          :: [PackageFlag],
566
        -- ^ The @-package@ and @-hide-package@ flags from the command-line
567

568
  -- Package state
Ian Lynagh's avatar
Ian Lynagh committed
569
  -- NB. do not modify this field, it is calculated by
570
  -- Packages.initPackages and Packages.updatePackages.
571
  pkgDatabase           :: Maybe [PackageConfig],
Ian Lynagh's avatar
Ian Lynagh committed
572
  pkgState              :: PackageState,
573

574
575
576
577
  -- Temporary files
  -- These have to be IORefs, because the defaultCleanupHandler needs to
  -- know what to clean when an exception happens
  filesToClean          :: IORef [FilePath],
578
  dirsToClean           :: IORef (Map FilePath FilePath),
579

580
581
582
583
584
  -- Names of files which were generated from -ddump-to-file; used to
  -- track which ones we need to truncate because it's our first run
  -- through
  generatedDumps        :: IORef (Set FilePath),

585
  -- hsc dynamic flags
586
587
  flags                 :: IntSet,
  warningFlags          :: IntSet,
588
  -- Don't change this without updating extensionFlags:
589
  language              :: Maybe Language,
590
591
  -- | Safe Haskell mode
  safeHaskell           :: SafeHaskellMode,
592
593
594
  -- We store the location of where some extension and flags were turned on so
  -- we can produce accurate error messages when Safe Haskell fails due to
  -- them.
595
596
  thOnLoc               :: SrcSpan,
  newDerivOnLoc         :: SrcSpan,
597
  pkgTrustOnLoc         :: SrcSpan,
598
599
  warnSafeOnLoc         :: SrcSpan,
  warnUnsafeOnLoc       :: SrcSpan,
600
601
602
603
  -- Don't change this without updating extensionFlags:
  extensions            :: [OnOff ExtensionFlag],
  -- extensionFlags should always be equal to
  --     flattenExtensionFlags language extensions
604
  extensionFlags        :: IntSet,
Ian Lynagh's avatar
Ian Lynagh committed
605

606
  -- | MsgDoc output action: use "ErrUtils" instead of this if you can
607
  log_action            :: LogAction,
608
609
  flushOut              :: FlushOut,
  flushErr              :: FlushErr,
David Waern's avatar
David Waern committed
610

611
  haddockOptions        :: Maybe String,
612
  ghciScripts           :: [String],
613

614
615
616
  -- Output style options
  pprUserLength         :: Int,

617
  -- | what kind of {-# SCC #-} to add automatically
618
619
620
  profAuto              :: ProfAuto,

  llvmVersion           :: IORef (Int)
621
622
 }

623
624
625
class HasDynFlags m where
    getDynFlags :: m DynFlags

Ian Lynagh's avatar
Ian Lynagh committed
626
627
628
class ContainsDynFlags t where
    extractDynFlags :: t -> DynFlags

629
630
631
632
633
data ProfAuto
  = NoProfAuto         -- ^ no SCC annotations added
  | ProfAutoAll        -- ^ top-level and nested functions are annotated
  | ProfAutoTop        -- ^ top-level functions annotated only
  | ProfAutoExports    -- ^ exported functions annotated only
634
  | ProfAutoCalls      -- ^ annotate call-sites
Simon Marlow's avatar
Simon Marlow committed
635
  deriving (Enum)
636

637
data Settings = Settings {
638
  sTargetPlatform        :: Platform,    -- Filled in by SysTools
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
  sGhcUsagePath          :: FilePath,    -- Filled in by SysTools
  sGhciUsagePath         :: FilePath,    -- ditto
  sTopDir                :: FilePath,
  sTmpDir                :: String,      -- no trailing '/'
  -- You shouldn't need to look things up in rawSettings directly.
  -- They should have their own fields instead.
  sRawSettings           :: [(String, String)],
  sExtraGccViaCFlags     :: [String],
  sSystemPackageConfig   :: FilePath,
  -- commands for particular phases
  sPgm_L                 :: String,
  sPgm_P                 :: (String,[Option]),
  sPgm_F                 :: String,
  sPgm_c                 :: (String,[Option]),
  sPgm_s                 :: (String,[Option]),
  sPgm_a                 :: (String,[Option]),
  sPgm_l                 :: (String,[Option]),
  sPgm_dll               :: (String,[Option]),
  sPgm_T                 :: String,
  sPgm_sysman            :: String,
  sPgm_windres           :: String,
  sPgm_lo                :: (String,[Option]), -- LLVM: opt llvm optimiser
661
662
663
664
665
666
667
668
669
670
671
672
  sPgm_lc                :: (String,[Option]), -- LLVM: llc static compiler
  -- options for particular phases
  sOpt_L                 :: [String],
  sOpt_P                 :: [String],
  sOpt_F                 :: [String],
  sOpt_c                 :: [String],
  sOpt_a                 :: [String],
  sOpt_l                 :: [String],
  sOpt_windres           :: [String],
  sOpt_lo                :: [String], -- LLVM: llvm optimiser
  sOpt_lc                :: [String]  -- LLVM: llc static compiler

673
674
 }

675
676
677
targetPlatform :: DynFlags -> Platform
targetPlatform dflags = sTargetPlatform (settings dflags)

678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
ghcUsagePath          :: DynFlags -> FilePath
ghcUsagePath dflags = sGhcUsagePath (settings dflags)
ghciUsagePath         :: DynFlags -> FilePath
ghciUsagePath dflags = sGhciUsagePath (settings dflags)
topDir                :: DynFlags -> FilePath
topDir dflags = sTopDir (settings dflags)
tmpDir                :: DynFlags -> String
tmpDir dflags = sTmpDir (settings dflags)
rawSettings           :: DynFlags -> [(String, String)]
rawSettings dflags = sRawSettings (settings dflags)
extraGccViaCFlags     :: DynFlags -> [String]
extraGccViaCFlags dflags = sExtraGccViaCFlags (settings dflags)
systemPackageConfig   :: DynFlags -> FilePath
systemPackageConfig dflags = sSystemPackageConfig (settings dflags)
pgm_L                 :: DynFlags -> String
pgm_L dflags = sPgm_L (settings dflags)
pgm_P                 :: DynFlags -> (String,[Option])
pgm_P dflags = sPgm_P (settings dflags)
pgm_F                 :: DynFlags -> String
pgm_F dflags = sPgm_F (settings dflags)
pgm_c                 :: DynFlags -> (String,[Option])
pgm_c dflags = sPgm_c (settings dflags)
pgm_s                 :: DynFlags -> (String,[Option])
pgm_s dflags = sPgm_s (settings dflags)
pgm_a                 :: DynFlags -> (String,[Option])
pgm_a dflags = sPgm_a (settings dflags)
pgm_l                 :: DynFlags -> (String,[Option])
pgm_l dflags = sPgm_l (settings dflags)
pgm_dll               :: DynFlags -> (String,[Option])
pgm_dll dflags = sPgm_dll (settings dflags)
pgm_T                 :: DynFlags -> String
pgm_T dflags = sPgm_T (settings dflags)
pgm_sysman            :: DynFlags -> String
pgm_sysman dflags = sPgm_sysman (settings dflags)
pgm_windres           :: DynFlags -> String
pgm_windres dflags = sPgm_windres (settings dflags)
pgm_lo                :: DynFlags -> (String,[Option])
pgm_lo dflags = sPgm_lo (settings dflags)
pgm_lc                :: DynFlags -> (String,[Option])
pgm_lc dflags = sPgm_lc (settings dflags)
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
opt_L                 :: DynFlags -> [String]
opt_L dflags = sOpt_L (settings dflags)
opt_P                 :: DynFlags -> [String]
opt_P dflags = sOpt_P (settings dflags)
opt_F                 :: DynFlags -> [String]
opt_F dflags = sOpt_F (settings dflags)
opt_c                 :: DynFlags -> [String]
opt_c dflags = sOpt_c (settings dflags)
opt_a                 :: DynFlags -> [String]
opt_a dflags = sOpt_a (settings dflags)
opt_l                 :: DynFlags -> [String]
opt_l dflags = sOpt_l (settings dflags)
opt_windres           :: DynFlags -> [String]
opt_windres dflags = sOpt_windres (settings dflags)
opt_lo                :: DynFlags -> [String]
opt_lo dflags = sOpt_lo (settings dflags)
opt_lc                :: DynFlags -> [String]
opt_lc dflags = sOpt_lc (settings dflags)
736

737
738
739
wayNames :: DynFlags -> [WayName]
wayNames = map wayName . ways

740
741
-- | The target code type of the compilation (if any).
--
742
743
744
-- Whenever you change the target, also make sure to set 'ghcLink' to
-- something sensible.
--
745
746
747
748
-- 'HscNothing' can be used to avoid generating any output, however, note
-- that:
--
--  * This will not run the desugaring step, thus no warnings generated in
749
750
751
--    this step will be output.  In particular, this includes warnings related
--    to pattern matching.  You can run the desugarer manually using
--    'GHC.desugarModule'.
752
--
753
754
755
756
--  * If a program uses Template Haskell the typechecker may try to run code
--    from an imported module.  This will fail if no code has been generated
--    for this module.  You can use 'GHC.needsTemplateHaskell' to detect
--    whether this might be the case and choose to either switch to a
Simon Hengel's avatar
Simon Hengel committed
757
--    different target or avoid typechecking such modules.  (The latter may be
758
--    preferable for security reasons.)
759
--
760
data HscTarget
761
762
  = HscC           -- ^ Generate C code.
  | HscAsm         -- ^ Generate assembly using the native code generator.
763
  | HscLlvm        -- ^ Generate assembly using the llvm code generator.
764
765
  | HscInterpreted -- ^ Generate bytecode.  (Requires 'LinkInMemory')
  | HscNothing     -- ^ Don't generate any code.  See notes above.
766
767
  deriving (Eq, Show)

Ian Lynagh's avatar
Ian Lynagh committed
768
769
770
771
772
773
774
showHscTargetFlag :: HscTarget -> String
showHscTargetFlag HscC           = "-fvia-c"
showHscTargetFlag HscAsm         = "-fasm"
showHscTargetFlag HscLlvm        = "-fllvm"
showHscTargetFlag HscInterpreted = "-fbyte-code"
showHscTargetFlag HscNothing     = "-fno-code"

775
-- | Will this target result in an object file on the disk?
776
777
778
isObjectTarget :: HscTarget -> Bool
isObjectTarget HscC     = True
isObjectTarget HscAsm   = True
779
isObjectTarget HscLlvm  = True
780
781
isObjectTarget _        = False

782
783
784
785
786
787
788
789
790
791
792
-- | Does this target retain *all* top-level bindings for a module,
-- rather than just the exported bindings, in the TypeEnv and compiled
-- code (if any)?  In interpreted mode we do this, so that GHCi can
-- call functions inside a module.  In HscNothing mode we also do it,
-- so that Haddock can get access to the GlobalRdrEnv for a module
-- after typechecking it.
targetRetainsAllBindings :: HscTarget -> Bool
targetRetainsAllBindings HscInterpreted = True
targetRetainsAllBindings HscNothing     = True
targetRetainsAllBindings _              = False

793
794
795
796
797
798
-- | The 'GhcMode' tells us whether we're doing multi-module
-- compilation (controlled via the "GHC" API) or one-shot
-- (single-module) compilation.  This makes a difference primarily to
-- the "Finder": in one-shot mode we look for interface files for
-- imported modules, but in multi-module mode we look for source files
-- in order to check whether they need to be recompiled.
799
data GhcMode
800
801
802
  = CompManager         -- ^ @\-\-make@, GHCi, etc.
  | OneShot             -- ^ @ghc -c Foo.hs@
  | MkDepend            -- ^ @ghc -M@, see "Finder" for why we need this
803
804
  deriving Eq

805
806
807
808
809
instance Outputable GhcMode where
  ppr CompManager = ptext (sLit "CompManager")
  ppr OneShot     = ptext (sLit "OneShot")
  ppr MkDepend    = ptext (sLit "MkDepend")

810
811
812
813
isOneShot :: GhcMode -> Bool
isOneShot OneShot = True
isOneShot _other  = False

814
815
816
817
-- | What to do in the link step, if there is one.
data GhcLink
  = NoLink              -- ^ Don't link at all
  | LinkBinary          -- ^ Link object code into a binary
818
819
  | LinkInMemory        -- ^ Use the in-memory dynamic linker (works for both
                        --   bytecode and object code).
820
  | LinkDynLib          -- ^ Link objects into a dynamic lib (DLL on Windows, DSO on ELF platforms)
821
  deriving (Eq, Show)
822
823
824

isNoLink :: GhcLink -> Bool
isNoLink NoLink = True
twanvl's avatar
twanvl committed
825
isNoLink _      = False
826

827
828
829
-- Is it worth evaluating this Bool and caching it in the DynFlags value
-- during initDynFlags?
doingTickyProfiling :: DynFlags -> Bool
830
831
832
doingTickyProfiling _ = opt_Ticky
  -- XXX -ticky is a static flag, because it implies -debug which is also
  -- static.  If the way flags were made dynamic, we could fix this.
833

834
data PackageFlag
835
  = ExposePackage   String
836
  | ExposePackageId String
837
838
839
840
  | HidePackage     String
  | IgnorePackage   String
  | TrustPackage    String
  | DistrustPackage String
841
  deriving Eq
842

twanvl's avatar
twanvl committed
843
defaultHscTarget :: HscTarget
844
845
defaultHscTarget = defaultObjectTarget

846
-- | The 'HscTarget' value corresponding to the default way to create
847
-- object files on the current platform.
twanvl's avatar
twanvl committed
848
defaultObjectTarget :: HscTarget
849
defaultObjectTarget
850
  | cGhcUnregisterised    == "YES"      =  HscC
Ian Lynagh's avatar
Ian Lynagh committed
851
  | cGhcWithNativeCodeGen == "YES"      =  HscAsm
852
  | otherwise                           =  HscLlvm
853

854
855
856
857
858
data DynLibLoader
  = Deployable
  | SystemDependent
  deriving Eq

Ian Lynagh's avatar
Ian Lynagh committed
859
data RtsOptsEnabled = RtsOptsNone | RtsOptsSafeOnly | RtsOptsAll
860
  deriving (Show)
Ian Lynagh's avatar
Ian Lynagh committed
861

862
-- | Used by 'GHC.newSession' to partially initialize a new 'DynFlags' value
twanvl's avatar
twanvl committed
863
initDynFlags :: DynFlags -> IO DynFlags
864
865
866
initDynFlags dflags = do
 -- someday these will be dynamic flags
 ways <- readIORef v_Ways
867
 refFilesToClean <- newIORef []
868
 refDirsToClean <- newIORef Map.empty
869
 refGeneratedDumps <- newIORef Set.empty
870
 refLlvmVersion <- newIORef 28
871
 return dflags{
872
873
874
875
876
877
878
        ways           = ways,
        buildTag       = mkBuildTag (filter (not . wayRTSOnly) ways),
        rtsBuildTag    = mkBuildTag ways,
        filesToClean   = refFilesToClean,
        dirsToClean    = refDirsToClean,
        generatedDumps = refGeneratedDumps,
        llvmVersion    = refLlvmVersion
Ian Lynagh's avatar
Ian Lynagh committed
879
        }
880

881
882
-- | The normal 'DynFlags'. Note that they is not suitable for use in this form
-- and must be fully initialized by 'GHC.newSession' first.
883
884
defaultDynFlags :: Settings -> DynFlags
defaultDynFlags mySettings =
885
     DynFlags {
Ian Lynagh's avatar
Ian Lynagh committed
886
887
888
889
890
891
892
        ghcMode                 = CompManager,
        ghcLink                 = LinkBinary,
        hscTarget               = defaultHscTarget,
        hscOutName              = "",
        extCoreName             = "",
        verbosity               = 0,
        optLevel                = 0,
893
        simplPhases             = 2,
Ian Lynagh's avatar
Ian Lynagh committed
894
        maxSimplIterations      = 4,
895
        shouldDumpSimplPhase    = Nothing,
Ian Lynagh's avatar
Ian Lynagh committed
896
        ruleCheck               = Nothing,
dterei's avatar
dterei committed
897
        simplTickFactor         = 100,
898
        specConstrThreshold     = Just 2000,
Ian Lynagh's avatar
Ian Lynagh committed
899
        specConstrCount         = Just 3,
900
        liberateCaseThreshold   = Just 2000,
901
        floatLamArgs            = Just 0, -- Default: float only if no fvs
902
903
        strictnessBefore        = [],

Ian Lynagh's avatar
Ian Lynagh committed
904
905
906
907
908
909
910
911
912
        cmdlineHcIncludes       = [],
        importPaths             = ["."],
        mainModIs               = mAIN,
        mainFunIs               = Nothing,
        ctxtStkDepth            = mAX_CONTEXT_REDUCTION_DEPTH,

        thisPackage             = mainPackageId,

        objectDir               = Nothing,
913
        dylibInstallName        = Nothing,
Ian Lynagh's avatar
Ian Lynagh committed
914
915
        hiDir                   = Nothing,
        stubDir                 = Nothing,
916
        dumpDir                 = Nothing,
Ian Lynagh's avatar
Ian Lynagh committed
917
918
919
920
921

        objectSuf               = phaseInputExt StopLn,
        hcSuf                   = phaseInputExt HCc,
        hiSuf                   = "hi",

922
923
924
        pluginModNames          = [],
        pluginModNameOpts       = [],

Ian Lynagh's avatar
Ian Lynagh committed
925
926
        outputFile              = Nothing,
        outputHi                = Nothing,
927
        dynLibLoader            = SystemDependent,
Ian Lynagh's avatar
Ian Lynagh committed
928
929
930
931
932
933
        dumpPrefix              = Nothing,
        dumpPrefixForce         = Nothing,
        includePaths            = [],
        libraryPaths            = [],
        frameworkPaths          = [],
        cmdlineFrameworks       = [],
934
        rtsOpts                 = Nothing,
Ian Lynagh's avatar
Ian Lynagh committed
935
        rtsOptsEnabled          = RtsOptsSafeOnly,
Ian Lynagh's avatar
Ian Lynagh committed
936
937
938

        hpcDir                  = ".hpc",

939
        extraPkgConfs           = id,
Ian Lynagh's avatar
Ian Lynagh committed
940
        packageFlags            = [],
941
942
        pkgDatabase             = Nothing,
        pkgState                = panic "no package state yet: call GHC.setSessionDynFlags",
943
        ways                    = panic "defaultDynFlags: No ways",
Ian Lynagh's avatar
Ian Lynagh committed
944
945
        buildTag                = panic "defaultDynFlags: No buildTag",
        rtsBuildTag             = panic "defaultDynFlags: No rtsBuildTag",
946
        splitInfo               = Nothing,
947
        settings                = mySettings,
948
949
950
951
952
953
        -- ghc -M values
        depMakefile       = "Makefile",
        depIncludePkgDeps = False,
        depExcludeMods    = [],
        depSuffixes       = [],
        -- end of ghc -M values