Don't force -static on mips
[ghc.git] / compiler / main / DynFlags.hs
1 {-# OPTIONS -fno-warn-missing-fields #-}
2 -----------------------------------------------------------------------------
3 --
4 -- Dynamic flags
5 --
6 -- Most flags are dynamic flags, which means they can change from
7 -- compilation to compilation using OPTIONS_GHC pragmas, and in a
8 -- multi-session GHC each session can be using different dynamic
9 -- flags. Dynamic flags can also be set at the prompt in GHCi.
10 --
11 -- (c) The University of Glasgow 2005
12 --
13 -----------------------------------------------------------------------------
14
15 module DynFlags (
16 -- Dynamic flags
17 DynFlag(..),
18 DynFlags(..),
19 HscTarget(..),
20 GhcMode(..), isOneShot,
21 GhcLink(..), isNoLink,
22 PackageFlag(..),
23 Option(..),
24
25 -- Configuration of the core-to-core and stg-to-stg phases
26 CoreToDo(..),
27 StgToDo(..),
28 SimplifierSwitch(..),
29 SimplifierMode(..), FloatOutSwitches(..),
30 getCoreToDo, getStgToDo,
31
32 -- Manipulating DynFlags
33 defaultDynFlags, -- DynFlags
34 initDynFlags, -- DynFlags -> IO DynFlags
35
36 dopt, -- DynFlag -> DynFlags -> Bool
37 dopt_set, dopt_unset, -- DynFlags -> DynFlag -> DynFlags
38 getOpts, -- (DynFlags -> [a]) -> IO [a]
39 getVerbFlag,
40 updOptLevel,
41 setTmpDir,
42 setPackageName,
43
44 -- parsing DynFlags
45 parseDynamicFlags,
46 allFlags,
47
48 -- misc stuff
49 machdepCCOpts, picCCOpts
50 ) where
51
52 #include "HsVersions.h"
53
54 import Module ( Module, mkModuleName, mkModule )
55 import PackageConfig
56 import PrelNames ( mAIN )
57 #ifdef i386_TARGET_ARCH
58 import StaticFlags ( opt_Static )
59 #endif
60 import StaticFlags ( opt_PIC, WayName(..), v_Ways, v_Build_tag,
61 v_RTS_Build_tag )
62 import {-# SOURCE #-} Packages (PackageState)
63 import DriverPhases ( Phase(..), phaseInputExt )
64 import Config
65 import CmdLineParser
66 import Constants ( mAX_CONTEXT_REDUCTION_DEPTH )
67 import Panic ( panic, GhcException(..) )
68 import UniqFM ( UniqFM )
69 import Util ( notNull, splitLongestPrefix, normalisePath )
70 import Maybes ( fromJust, orElse )
71 import SrcLoc ( SrcSpan )
72 import Outputable
73 import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
74
75 import Data.IORef ( readIORef )
76 import Control.Exception ( throwDyn )
77 import Control.Monad ( when )
78 #ifdef mingw32_TARGET_OS
79 import Data.List ( isPrefixOf )
80 #else
81 import Util ( split )
82 #endif
83
84 import Data.Char ( isDigit, isUpper )
85 import System.IO ( hPutStrLn, stderr )
86
87 -- -----------------------------------------------------------------------------
88 -- DynFlags
89
90 data DynFlag
91
92 -- debugging flags
93 = Opt_D_dump_cmm
94 | Opt_D_dump_asm
95 | Opt_D_dump_cpranal
96 | Opt_D_dump_deriv
97 | Opt_D_dump_ds
98 | Opt_D_dump_flatC
99 | Opt_D_dump_foreign
100 | Opt_D_dump_inlinings
101 | Opt_D_dump_occur_anal
102 | Opt_D_dump_parsed
103 | Opt_D_dump_rn
104 | Opt_D_dump_simpl
105 | Opt_D_dump_simpl_iterations
106 | Opt_D_dump_spec
107 | Opt_D_dump_prep
108 | Opt_D_dump_stg
109 | Opt_D_dump_stranal
110 | Opt_D_dump_tc
111 | Opt_D_dump_types
112 | Opt_D_dump_rules
113 | Opt_D_dump_cse
114 | Opt_D_dump_worker_wrapper
115 | Opt_D_dump_rn_trace
116 | Opt_D_dump_rn_stats
117 | Opt_D_dump_opt_cmm
118 | Opt_D_dump_simpl_stats
119 | Opt_D_dump_tc_trace
120 | Opt_D_dump_if_trace
121 | Opt_D_dump_splices
122 | Opt_D_dump_BCOs
123 | Opt_D_dump_vect
124 | Opt_D_dump_hpc
125 | Opt_D_source_stats
126 | Opt_D_verbose_core2core
127 | Opt_D_verbose_stg2stg
128 | Opt_D_dump_hi
129 | Opt_D_dump_hi_diffs
130 | Opt_D_dump_minimal_imports
131 | Opt_D_faststring_stats
132 | Opt_DoCoreLinting
133 | Opt_DoStgLinting
134 | Opt_DoCmmLinting
135
136 | Opt_WarnIsError -- -Werror; makes warnings fatal
137 | Opt_WarnDuplicateExports
138 | Opt_WarnHiShadows
139 | Opt_WarnIncompletePatterns
140 | Opt_WarnIncompletePatternsRecUpd
141 | Opt_WarnMissingFields
142 | Opt_WarnMissingMethods
143 | Opt_WarnMissingSigs
144 | Opt_WarnNameShadowing
145 | Opt_WarnOverlappingPatterns
146 | Opt_WarnSimplePatterns
147 | Opt_WarnTypeDefaults
148 | Opt_WarnUnusedBinds
149 | Opt_WarnUnusedImports
150 | Opt_WarnUnusedMatches
151 | Opt_WarnDeprecations
152 | Opt_WarnDodgyImports
153 | Opt_WarnOrphans
154
155 -- language opts
156 | Opt_AllowOverlappingInstances
157 | Opt_AllowUndecidableInstances
158 | Opt_AllowIncoherentInstances
159 | Opt_MonomorphismRestriction
160 | Opt_MonoPatBinds
161 | Opt_ExtendedDefaultRules -- Use GHC's extended rules for defaulting
162 | Opt_GlasgowExts
163 | Opt_FFI
164 | Opt_PArr -- Syntactic support for parallel arrays
165 | Opt_Arrows -- Arrow-notation syntax
166 | Opt_TH
167 | Opt_ImplicitParams
168 | Opt_Generics
169 | Opt_ImplicitPrelude
170 | Opt_ScopedTypeVariables
171 | Opt_BangPatterns
172 | Opt_IndexedTypes
173
174 -- optimisation opts
175 | Opt_Strictness
176 | Opt_FullLaziness
177 | Opt_CSE
178 | Opt_IgnoreInterfacePragmas
179 | Opt_OmitInterfacePragmas
180 | Opt_DoLambdaEtaExpansion
181 | Opt_IgnoreAsserts
182 | Opt_IgnoreBreakpoints
183 | Opt_DoEtaReduction
184 | Opt_CaseMerge
185 | Opt_UnboxStrictFields
186 | Opt_DictsCheap
187
188 -- misc opts
189 | Opt_Cpp
190 | Opt_Pp
191 | Opt_ForceRecomp
192 | Opt_DryRun
193 | Opt_DoAsmMangling
194 | Opt_ExcessPrecision
195 | Opt_ReadUserPackageConf
196 | Opt_NoHsMain
197 | Opt_SplitObjs
198 | Opt_StgStats
199 | Opt_HideAllPackages
200 | Opt_PrintBindResult
201 | Opt_Haddock
202 | Opt_Hpc
203 | Opt_Hpc_Trace
204
205 -- keeping stuff
206 | Opt_KeepHiDiffs
207 | Opt_KeepHcFiles
208 | Opt_KeepSFiles
209 | Opt_KeepRawSFiles
210 | Opt_KeepTmpFiles
211
212 deriving (Eq)
213
214 data DynFlags = DynFlags {
215 ghcMode :: GhcMode,
216 ghcLink :: GhcLink,
217 coreToDo :: Maybe [CoreToDo], -- reserved for -Ofile
218 stgToDo :: Maybe [StgToDo], -- similarly
219 hscTarget :: HscTarget,
220 hscOutName :: String, -- name of the output file
221 extCoreName :: String, -- name of the .core output file
222 verbosity :: Int, -- verbosity level
223 optLevel :: Int, -- optimisation level
224 maxSimplIterations :: Int, -- max simplifier iterations
225 ruleCheck :: Maybe String,
226 stolen_x86_regs :: Int,
227 cmdlineHcIncludes :: [String], -- -#includes
228 importPaths :: [FilePath],
229 mainModIs :: Module,
230 mainFunIs :: Maybe String,
231 ctxtStkDepth :: Int, -- Typechecker context stack depth
232
233 thisPackage :: PackageId,
234
235 -- ways
236 wayNames :: [WayName], -- way flags from the cmd line
237 buildTag :: String, -- the global "way" (eg. "p" for prof)
238 rtsBuildTag :: String, -- the RTS "way"
239
240 -- paths etc.
241 objectDir :: Maybe String,
242 hiDir :: Maybe String,
243 stubDir :: Maybe String,
244
245 objectSuf :: String,
246 hcSuf :: String,
247 hiSuf :: String,
248
249 outputFile :: Maybe String,
250 outputHi :: Maybe String,
251
252 includePaths :: [String],
253 libraryPaths :: [String],
254 frameworkPaths :: [String], -- used on darwin only
255 cmdlineFrameworks :: [String], -- ditto
256 tmpDir :: String, -- no trailing '/'
257
258 ghcUsagePath :: FilePath, -- Filled in by SysTools
259 ghciUsagePath :: FilePath, -- ditto
260
261 hpcDir :: String, -- ^ path to store the .mix files
262
263 -- options for particular phases
264 opt_L :: [String],
265 opt_P :: [String],
266 opt_F :: [String],
267 opt_c :: [String],
268 opt_m :: [String],
269 opt_a :: [String],
270 opt_l :: [String],
271 opt_dll :: [String],
272 opt_dep :: [String],
273
274 -- commands for particular phases
275 pgm_L :: String,
276 pgm_P :: (String,[Option]),
277 pgm_F :: String,
278 pgm_c :: (String,[Option]),
279 pgm_m :: (String,[Option]),
280 pgm_s :: (String,[Option]),
281 pgm_a :: (String,[Option]),
282 pgm_l :: (String,[Option]),
283 pgm_dll :: (String,[Option]),
284 pgm_T :: String,
285 pgm_sysman :: String,
286
287 -- Package flags
288 extraPkgConfs :: [FilePath],
289 topDir :: FilePath, -- filled in by SysTools
290 systemPackageConfig :: FilePath, -- ditto
291 -- The -package-conf flags given on the command line, in the order
292 -- they appeared.
293
294 packageFlags :: [PackageFlag],
295 -- The -package and -hide-package flags from the command-line
296
297 -- Package state
298 -- NB. do not modify this field, it is calculated by
299 -- Packages.initPackages and Packages.updatePackages.
300 pkgDatabase :: Maybe (UniqFM InstalledPackageInfo),
301 pkgState :: PackageState,
302
303 -- hsc dynamic flags
304 flags :: [DynFlag],
305
306 -- message output
307 log_action :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
308 }
309
310 data HscTarget
311 = HscC
312 | HscAsm
313 | HscJava
314 | HscInterpreted
315 | HscNothing
316 deriving (Eq, Show)
317
318 data GhcMode
319 = BatchCompile -- | @ghc --make Main@
320 | Interactive -- | @ghc --interactive@
321 | OneShot -- | @ghc -c Foo.hs@
322 | JustTypecheck -- | Development environemnts, refactorer, etc.
323 | MkDepend
324 deriving Eq
325
326 isOneShot :: GhcMode -> Bool
327 isOneShot OneShot = True
328 isOneShot _other = False
329
330 data GhcLink -- What to do in the link step, if there is one
331 = -- Only relevant for modes
332 -- DoMake and StopBefore StopLn
333 NoLink -- Don't link at all
334 | StaticLink -- Ordinary linker [the default]
335 | MkDLL -- Make a DLL
336
337 isNoLink :: GhcLink -> Bool
338 isNoLink NoLink = True
339 isNoLink other = False
340
341 data PackageFlag
342 = ExposePackage String
343 | HidePackage String
344 | IgnorePackage String
345 deriving Eq
346
347 defaultHscTarget
348 | cGhcWithNativeCodeGen == "YES" = HscAsm
349 | otherwise = HscC
350
351 initDynFlags dflags = do
352 -- someday these will be dynamic flags
353 ways <- readIORef v_Ways
354 build_tag <- readIORef v_Build_tag
355 rts_build_tag <- readIORef v_RTS_Build_tag
356 return dflags{
357 wayNames = ways,
358 buildTag = build_tag,
359 rtsBuildTag = rts_build_tag
360 }
361
362 defaultDynFlags =
363 DynFlags {
364 ghcMode = OneShot,
365 ghcLink = StaticLink,
366 coreToDo = Nothing,
367 stgToDo = Nothing,
368 hscTarget = defaultHscTarget,
369 hscOutName = "",
370 extCoreName = "",
371 verbosity = 0,
372 optLevel = 0,
373 maxSimplIterations = 4,
374 ruleCheck = Nothing,
375 stolen_x86_regs = 4,
376 cmdlineHcIncludes = [],
377 importPaths = ["."],
378 mainModIs = mAIN,
379 mainFunIs = Nothing,
380 ctxtStkDepth = mAX_CONTEXT_REDUCTION_DEPTH,
381
382 thisPackage = mainPackageId,
383
384 objectDir = Nothing,
385 hiDir = Nothing,
386 stubDir = Nothing,
387
388 objectSuf = phaseInputExt StopLn,
389 hcSuf = phaseInputExt HCc,
390 hiSuf = "hi",
391
392 outputFile = Nothing,
393 outputHi = Nothing,
394 includePaths = [],
395 libraryPaths = [],
396 frameworkPaths = [],
397 cmdlineFrameworks = [],
398 tmpDir = cDEFAULT_TMPDIR,
399
400 hpcDir = ".hpc",
401
402 opt_L = [],
403 opt_P = [],
404 opt_F = [],
405 opt_c = [],
406 opt_a = [],
407 opt_m = [],
408 opt_l = [],
409 opt_dll = [],
410 opt_dep = [],
411
412 extraPkgConfs = [],
413 packageFlags = [],
414 pkgDatabase = Nothing,
415 pkgState = panic "no package state yet: call GHC.setSessionDynFlags",
416
417 flags = [
418 Opt_ReadUserPackageConf,
419
420 Opt_MonoPatBinds, -- Experimentally, I'm making this non-standard
421 -- behaviour the default, to see if anyone notices
422 -- SLPJ July 06
423
424 Opt_ImplicitPrelude,
425 Opt_MonomorphismRestriction,
426 Opt_Strictness,
427 -- strictness is on by default, but this only
428 -- applies to -O.
429 Opt_CSE, -- similarly for CSE.
430 Opt_FullLaziness, -- ...and for full laziness
431
432 Opt_DoLambdaEtaExpansion,
433 -- This one is important for a tiresome reason:
434 -- we want to make sure that the bindings for data
435 -- constructors are eta-expanded. This is probably
436 -- a good thing anyway, but it seems fragile.
437
438 Opt_DoAsmMangling,
439
440 -- and the default no-optimisation options:
441 Opt_IgnoreInterfacePragmas,
442 Opt_OmitInterfacePragmas,
443
444 -- on by default:
445 Opt_PrintBindResult
446 ] ++ standardWarnings,
447
448 log_action = \severity srcSpan style msg ->
449 case severity of
450 SevInfo -> hPutStrLn stderr (show (msg style))
451 SevFatal -> hPutStrLn stderr (show (msg style))
452 _ -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
453 }
454
455 {-
456 Verbosity levels:
457
458 0 | print errors & warnings only
459 1 | minimal verbosity: print "compiling M ... done." for each module.
460 2 | equivalent to -dshow-passes
461 3 | equivalent to existing "ghc -v"
462 4 | "ghc -v -ddump-most"
463 5 | "ghc -v -ddump-all"
464 -}
465
466 dopt :: DynFlag -> DynFlags -> Bool
467 dopt f dflags = f `elem` (flags dflags)
468
469 dopt_set :: DynFlags -> DynFlag -> DynFlags
470 dopt_set dfs f = dfs{ flags = f : flags dfs }
471
472 dopt_unset :: DynFlags -> DynFlag -> DynFlags
473 dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }
474
475 getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
476 getOpts dflags opts = reverse (opts dflags)
477 -- We add to the options from the front, so we need to reverse the list
478
479 getVerbFlag :: DynFlags -> String
480 getVerbFlag dflags
481 | verbosity dflags >= 3 = "-v"
482 | otherwise = ""
483
484 setObjectDir f d = d{ objectDir = f}
485 setHiDir f d = d{ hiDir = f}
486 setStubDir f d = d{ stubDir = f}
487
488 setObjectSuf f d = d{ objectSuf = f}
489 setHiSuf f d = d{ hiSuf = f}
490 setHcSuf f d = d{ hcSuf = f}
491
492 setOutputFile f d = d{ outputFile = f}
493 setOutputHi f d = d{ outputHi = f}
494
495 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
496 -- Config.hs should really use Option.
497 setPgmP f d = let (pgm:args) = words f in d{ pgm_P = (pgm, map Option args)}
498
499 setPgmL f d = d{ pgm_L = f}
500 setPgmF f d = d{ pgm_F = f}
501 setPgmc f d = d{ pgm_c = (f,[])}
502 setPgmm f d = d{ pgm_m = (f,[])}
503 setPgms f d = d{ pgm_s = (f,[])}
504 setPgma f d = d{ pgm_a = (f,[])}
505 setPgml f d = d{ pgm_l = (f,[])}
506 setPgmdll f d = d{ pgm_dll = (f,[])}
507
508 addOptL f d = d{ opt_L = f : opt_L d}
509 addOptP f d = d{ opt_P = f : opt_P d}
510 addOptF f d = d{ opt_F = f : opt_F d}
511 addOptc f d = d{ opt_c = f : opt_c d}
512 addOptm f d = d{ opt_m = f : opt_m d}
513 addOpta f d = d{ opt_a = f : opt_a d}
514 addOptl f d = d{ opt_l = f : opt_l d}
515 addOptdll f d = d{ opt_dll = f : opt_dll d}
516 addOptdep f d = d{ opt_dep = f : opt_dep d}
517
518 addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}
519
520 -- -----------------------------------------------------------------------------
521 -- Command-line options
522
523 -- When invoking external tools as part of the compilation pipeline, we
524 -- pass these a sequence of options on the command-line. Rather than
525 -- just using a list of Strings, we use a type that allows us to distinguish
526 -- between filepaths and 'other stuff'. [The reason being, of course, that
527 -- this type gives us a handle on transforming filenames, and filenames only,
528 -- to whatever format they're expected to be on a particular platform.]
529
530 data Option
531 = FileOption -- an entry that _contains_ filename(s) / filepaths.
532 String -- a non-filepath prefix that shouldn't be
533 -- transformed (e.g., "/out=")
534 String -- the filepath/filename portion
535 | Option String
536
537 -----------------------------------------------------------------------------
538 -- Setting the optimisation level
539
540 updOptLevel :: Int -> DynFlags -> DynFlags
541 -- Set dynflags appropriate to the optimisation level
542 updOptLevel n dfs
543 = if (n >= 1)
544 then dfs2{ hscTarget = HscC, optLevel = n } -- turn on -fvia-C with -O
545 else dfs2{ optLevel = n }
546 where
547 dfs1 = foldr (flip dopt_unset) dfs remove_dopts
548 dfs2 = foldr (flip dopt_set) dfs1 extra_dopts
549
550 extra_dopts
551 | n == 0 = opt_0_dopts
552 | otherwise = opt_1_dopts
553
554 remove_dopts
555 | n == 0 = opt_1_dopts
556 | otherwise = opt_0_dopts
557
558 opt_0_dopts = [
559 Opt_IgnoreInterfacePragmas,
560 Opt_OmitInterfacePragmas
561 ]
562
563 opt_1_dopts = [
564 Opt_IgnoreAsserts,
565 Opt_DoEtaReduction,
566 Opt_CaseMerge
567 ]
568
569 -- -----------------------------------------------------------------------------
570 -- Standard sets of warning options
571
572 standardWarnings
573 = [ Opt_WarnDeprecations,
574 Opt_WarnOverlappingPatterns,
575 Opt_WarnMissingFields,
576 Opt_WarnMissingMethods,
577 Opt_WarnDuplicateExports
578 ]
579
580 minusWOpts
581 = standardWarnings ++
582 [ Opt_WarnUnusedBinds,
583 Opt_WarnUnusedMatches,
584 Opt_WarnUnusedImports,
585 Opt_WarnIncompletePatterns,
586 Opt_WarnDodgyImports
587 ]
588
589 minusWallOpts
590 = minusWOpts ++
591 [ Opt_WarnTypeDefaults,
592 Opt_WarnNameShadowing,
593 Opt_WarnMissingSigs,
594 Opt_WarnHiShadows,
595 Opt_WarnOrphans
596 ]
597
598 -- -----------------------------------------------------------------------------
599 -- CoreToDo: abstraction of core-to-core passes to run.
600
601 data CoreToDo -- These are diff core-to-core passes,
602 -- which may be invoked in any order,
603 -- as many times as you like.
604
605 = CoreDoSimplify -- The core-to-core simplifier.
606 SimplifierMode
607 [SimplifierSwitch]
608 -- Each run of the simplifier can take a different
609 -- set of simplifier-specific flags.
610 | CoreDoFloatInwards
611 | CoreDoFloatOutwards FloatOutSwitches
612 | CoreLiberateCase
613 | CoreDoPrintCore
614 | CoreDoStaticArgs
615 | CoreDoStrictness
616 | CoreDoWorkerWrapper
617 | CoreDoSpecialising
618 | CoreDoSpecConstr
619 | CoreDoOldStrictness
620 | CoreDoGlomBinds
621 | CoreCSE
622 | CoreDoRuleCheck Int{-CompilerPhase-} String -- Check for non-application of rules
623 -- matching this string
624
625 | CoreDoNothing -- useful when building up lists of these things
626
627 data SimplifierMode -- See comments in SimplMonad
628 = SimplGently
629 | SimplPhase Int
630
631 data SimplifierSwitch
632 = MaxSimplifierIterations Int
633 | NoCaseOfCase
634
635 data FloatOutSwitches
636 = FloatOutSw Bool -- True <=> float lambdas to top level
637 Bool -- True <=> float constants to top level,
638 -- even if they do not escape a lambda
639
640
641 -- The core-to-core pass ordering is derived from the DynFlags:
642
643 getCoreToDo :: DynFlags -> [CoreToDo]
644 getCoreToDo dflags
645 | Just todo <- coreToDo dflags = todo -- set explicitly by user
646 | otherwise = core_todo
647 where
648 opt_level = optLevel dflags
649 max_iter = maxSimplIterations dflags
650 strictness = dopt Opt_Strictness dflags
651 full_laziness = dopt Opt_FullLaziness dflags
652 cse = dopt Opt_CSE dflags
653 rule_check = ruleCheck dflags
654
655 core_todo =
656 if opt_level == 0 then
657 [
658 CoreDoSimplify (SimplPhase 0) [
659 MaxSimplifierIterations max_iter
660 ]
661 ]
662 else {- opt_level >= 1 -} [
663
664 -- initial simplify: mk specialiser happy: minimum effort please
665 CoreDoSimplify SimplGently [
666 -- Simplify "gently"
667 -- Don't inline anything till full laziness has bitten
668 -- In particular, inlining wrappers inhibits floating
669 -- e.g. ...(case f x of ...)...
670 -- ==> ...(case (case x of I# x# -> fw x#) of ...)...
671 -- ==> ...(case x of I# x# -> case fw x# of ...)...
672 -- and now the redex (f x) isn't floatable any more
673 -- Similarly, don't apply any rules until after full
674 -- laziness. Notably, list fusion can prevent floating.
675
676 NoCaseOfCase, -- Don't do case-of-case transformations.
677 -- This makes full laziness work better
678 MaxSimplifierIterations max_iter
679 ],
680
681 -- Specialisation is best done before full laziness
682 -- so that overloaded functions have all their dictionary lambdas manifest
683 CoreDoSpecialising,
684
685 if full_laziness then CoreDoFloatOutwards (FloatOutSw False False)
686 else CoreDoNothing,
687
688 CoreDoFloatInwards,
689
690 CoreDoSimplify (SimplPhase 2) [
691 -- Want to run with inline phase 2 after the specialiser to give
692 -- maximum chance for fusion to work before we inline build/augment
693 -- in phase 1. This made a difference in 'ansi' where an
694 -- overloaded function wasn't inlined till too late.
695 MaxSimplifierIterations max_iter
696 ],
697 case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },
698
699 CoreDoSimplify (SimplPhase 1) [
700 -- Need inline-phase2 here so that build/augment get
701 -- inlined. I found that spectral/hartel/genfft lost some useful
702 -- strictness in the function sumcode' if augment is not inlined
703 -- before strictness analysis runs
704 MaxSimplifierIterations max_iter
705 ],
706 case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },
707
708 CoreDoSimplify (SimplPhase 0) [
709 -- Phase 0: allow all Ids to be inlined now
710 -- This gets foldr inlined before strictness analysis
711
712 MaxSimplifierIterations 3
713 -- At least 3 iterations because otherwise we land up with
714 -- huge dead expressions because of an infelicity in the
715 -- simpifier.
716 -- let k = BIG in foldr k z xs
717 -- ==> let k = BIG in letrec go = \xs -> ...(k x).... in go xs
718 -- ==> let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
719 -- Don't stop now!
720
721 ],
722 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
723
724 #ifdef OLD_STRICTNESS
725 CoreDoOldStrictness
726 #endif
727 if strictness then CoreDoStrictness else CoreDoNothing,
728 CoreDoWorkerWrapper,
729 CoreDoGlomBinds,
730
731 CoreDoSimplify (SimplPhase 0) [
732 MaxSimplifierIterations max_iter
733 ],
734
735 if full_laziness then
736 CoreDoFloatOutwards (FloatOutSw False -- Not lambdas
737 True) -- Float constants
738 else CoreDoNothing,
739 -- nofib/spectral/hartel/wang doubles in speed if you
740 -- do full laziness late in the day. It only happens
741 -- after fusion and other stuff, so the early pass doesn't
742 -- catch it. For the record, the redex is
743 -- f_el22 (f_el21 r_midblock)
744
745
746 -- We want CSE to follow the final full-laziness pass, because it may
747 -- succeed in commoning up things floated out by full laziness.
748 -- CSE used to rely on the no-shadowing invariant, but it doesn't any more
749
750 if cse then CoreCSE else CoreDoNothing,
751
752 CoreDoFloatInwards,
753
754 -- Case-liberation for -O2. This should be after
755 -- strictness analysis and the simplification which follows it.
756
757 case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing }
758 ]
759
760 ++
761
762 (if opt_level >= 2 then
763 [ CoreLiberateCase,
764 CoreDoSimplify (SimplPhase 0) [
765 MaxSimplifierIterations max_iter
766 ], -- Run the simplifier after LiberateCase to vastly
767 -- reduce the possiblility of shadowing
768 -- Reason: see Note [Shadowing] in SpecConstr.lhs
769 CoreDoSpecConstr
770 ]
771 else
772 [])
773
774 ++
775
776 -- Final clean-up simplification:
777 [ CoreDoSimplify (SimplPhase 0) [
778 MaxSimplifierIterations max_iter
779 ]
780 ]
781
782 -- -----------------------------------------------------------------------------
783 -- StgToDo: abstraction of stg-to-stg passes to run.
784
785 data StgToDo
786 = StgDoMassageForProfiling -- should be (next to) last
787 -- There's also setStgVarInfo, but its absolute "lastness"
788 -- is so critical that it is hardwired in (no flag).
789 | D_stg_stats
790
791 getStgToDo :: DynFlags -> [StgToDo]
792 getStgToDo dflags
793 | Just todo <- stgToDo dflags = todo -- set explicitly by user
794 | otherwise = todo2
795 where
796 stg_stats = dopt Opt_StgStats dflags
797
798 todo1 = if stg_stats then [D_stg_stats] else []
799
800 todo2 | WayProf `elem` wayNames dflags
801 = StgDoMassageForProfiling : todo1
802 | otherwise
803 = todo1
804
805 -- -----------------------------------------------------------------------------
806 -- DynFlags parser
807
808 allFlags :: [String]
809 allFlags = map ('-':) $
810 [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
811 map ("fno-"++) flags ++
812 map ("f"++) flags
813 where ok (PrefixPred _ _) = False
814 ok _ = True
815 flags = map fst fFlags
816
817 dynamic_flags :: [(String, OptKind DynP)]
818 dynamic_flags = [
819 ( "n" , NoArg (setDynFlag Opt_DryRun) )
820 , ( "cpp" , NoArg (setDynFlag Opt_Cpp))
821 , ( "F" , NoArg (setDynFlag Opt_Pp))
822 , ( "#include" , HasArg (addCmdlineHCInclude) )
823 , ( "v" , OptIntSuffix setVerbosity )
824 ------- Specific phases --------------------------------------------
825 , ( "pgmL" , HasArg (upd . setPgmL) )
826 , ( "pgmP" , HasArg (upd . setPgmP) )
827 , ( "pgmF" , HasArg (upd . setPgmF) )
828 , ( "pgmc" , HasArg (upd . setPgmc) )
829 , ( "pgmm" , HasArg (upd . setPgmm) )
830 , ( "pgms" , HasArg (upd . setPgms) )
831 , ( "pgma" , HasArg (upd . setPgma) )
832 , ( "pgml" , HasArg (upd . setPgml) )
833 , ( "pgmdll" , HasArg (upd . setPgmdll) )
834
835 , ( "optL" , HasArg (upd . addOptL) )
836 , ( "optP" , HasArg (upd . addOptP) )
837 , ( "optF" , HasArg (upd . addOptF) )
838 , ( "optc" , HasArg (upd . addOptc) )
839 , ( "optm" , HasArg (upd . addOptm) )
840 , ( "opta" , HasArg (upd . addOpta) )
841 , ( "optl" , HasArg (upd . addOptl) )
842 , ( "optdll" , HasArg (upd . addOptdll) )
843 , ( "optdep" , HasArg (upd . addOptdep) )
844
845 , ( "split-objs" , NoArg (if can_split
846 then setDynFlag Opt_SplitObjs
847 else return ()) )
848
849 -------- Linking ----------------------------------------------------
850 , ( "c" , NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
851 , ( "no-link" , NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
852 , ( "-mk-dll" , NoArg (upd $ \d -> d{ ghcLink=MkDLL } ))
853
854 ------- Libraries ---------------------------------------------------
855 , ( "L" , Prefix addLibraryPath )
856 , ( "l" , AnySuffix (\s -> do upd (addOptl s)
857 upd (addOptdll s)))
858
859 ------- Frameworks --------------------------------------------------
860 -- -framework-path should really be -F ...
861 , ( "framework-path" , HasArg addFrameworkPath )
862 , ( "framework" , HasArg (upd . addCmdlineFramework) )
863
864 ------- Output Redirection ------------------------------------------
865 , ( "odir" , HasArg (upd . setObjectDir . Just))
866 , ( "o" , SepArg (upd . setOutputFile . Just))
867 , ( "ohi" , HasArg (upd . setOutputHi . Just ))
868 , ( "osuf" , HasArg (upd . setObjectSuf))
869 , ( "hcsuf" , HasArg (upd . setHcSuf))
870 , ( "hisuf" , HasArg (upd . setHiSuf))
871 , ( "hidir" , HasArg (upd . setHiDir . Just))
872 , ( "tmpdir" , HasArg (upd . setTmpDir))
873 , ( "stubdir" , HasArg (upd . setStubDir . Just))
874
875 ------- Keeping temporary files -------------------------------------
876 , ( "keep-hc-file" , AnySuffix (\_ -> setDynFlag Opt_KeepHcFiles))
877 , ( "keep-s-file" , AnySuffix (\_ -> setDynFlag Opt_KeepSFiles))
878 , ( "keep-raw-s-file", AnySuffix (\_ -> setDynFlag Opt_KeepRawSFiles))
879 , ( "keep-tmp-files" , AnySuffix (\_ -> setDynFlag Opt_KeepTmpFiles))
880
881 ------- Miscellaneous ----------------------------------------------
882 , ( "no-hs-main" , NoArg (setDynFlag Opt_NoHsMain))
883 , ( "main-is" , SepArg setMainIs )
884 , ( "haddock" , NoArg (setDynFlag Opt_Haddock) )
885 , ( "hpcdir" , SepArg setOptHpcDir )
886
887 ------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
888 , ( "recomp" , NoArg (unSetDynFlag Opt_ForceRecomp) )
889 , ( "no-recomp" , NoArg (setDynFlag Opt_ForceRecomp) )
890
891 ------- Packages ----------------------------------------------------
892 , ( "package-conf" , HasArg extraPkgConf_ )
893 , ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
894 , ( "package-name" , HasArg (upd . setPackageName) )
895 , ( "package" , HasArg exposePackage )
896 , ( "hide-package" , HasArg hidePackage )
897 , ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
898 , ( "ignore-package" , HasArg ignorePackage )
899 , ( "syslib" , HasArg exposePackage ) -- for compatibility
900
901 ------ HsCpp opts ---------------------------------------------------
902 , ( "D", AnySuffix (upd . addOptP) )
903 , ( "U", AnySuffix (upd . addOptP) )
904
905 ------- Include/Import Paths ----------------------------------------
906 , ( "I" , Prefix addIncludePath)
907 , ( "i" , OptPrefix addImportPath )
908
909 ------ Debugging ----------------------------------------------------
910 , ( "dstg-stats", NoArg (setDynFlag Opt_StgStats))
911
912 , ( "ddump-cmm", setDumpFlag Opt_D_dump_cmm)
913 , ( "ddump-asm", setDumpFlag Opt_D_dump_asm)
914 , ( "ddump-cpranal", setDumpFlag Opt_D_dump_cpranal)
915 , ( "ddump-deriv", setDumpFlag Opt_D_dump_deriv)
916 , ( "ddump-ds", setDumpFlag Opt_D_dump_ds)
917 , ( "ddump-flatC", setDumpFlag Opt_D_dump_flatC)
918 , ( "ddump-foreign", setDumpFlag Opt_D_dump_foreign)
919 , ( "ddump-inlinings", setDumpFlag Opt_D_dump_inlinings)
920 , ( "ddump-occur-anal", setDumpFlag Opt_D_dump_occur_anal)
921 , ( "ddump-parsed", setDumpFlag Opt_D_dump_parsed)
922 , ( "ddump-rn", setDumpFlag Opt_D_dump_rn)
923 , ( "ddump-simpl", setDumpFlag Opt_D_dump_simpl)
924 , ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
925 , ( "ddump-spec", setDumpFlag Opt_D_dump_spec)
926 , ( "ddump-prep", setDumpFlag Opt_D_dump_prep)
927 , ( "ddump-stg", setDumpFlag Opt_D_dump_stg)
928 , ( "ddump-stranal", setDumpFlag Opt_D_dump_stranal)
929 , ( "ddump-tc", setDumpFlag Opt_D_dump_tc)
930 , ( "ddump-types", setDumpFlag Opt_D_dump_types)
931 , ( "ddump-rules", setDumpFlag Opt_D_dump_rules)
932 , ( "ddump-cse", setDumpFlag Opt_D_dump_cse)
933 , ( "ddump-worker-wrapper", setDumpFlag Opt_D_dump_worker_wrapper)
934 , ( "ddump-rn-trace", NoArg (setDynFlag Opt_D_dump_rn_trace))
935 , ( "ddump-if-trace", NoArg (setDynFlag Opt_D_dump_if_trace))
936 , ( "ddump-tc-trace", setDumpFlag Opt_D_dump_tc_trace)
937 , ( "ddump-splices", setDumpFlag Opt_D_dump_splices)
938 , ( "ddump-rn-stats", NoArg (setDynFlag Opt_D_dump_rn_stats))
939 , ( "ddump-opt-cmm", setDumpFlag Opt_D_dump_opt_cmm)
940 , ( "ddump-simpl-stats", setDumpFlag Opt_D_dump_simpl_stats)
941 , ( "ddump-bcos", setDumpFlag Opt_D_dump_BCOs)
942 , ( "dsource-stats", setDumpFlag Opt_D_source_stats)
943 , ( "dverbose-core2core", setDumpFlag Opt_D_verbose_core2core)
944 , ( "dverbose-stg2stg", setDumpFlag Opt_D_verbose_stg2stg)
945 , ( "ddump-hi-diffs", NoArg (setDynFlag Opt_D_dump_hi_diffs))
946 , ( "ddump-hi", setDumpFlag Opt_D_dump_hi)
947 , ( "ddump-minimal-imports", NoArg (setDynFlag Opt_D_dump_minimal_imports))
948 , ( "ddump-vect", setDumpFlag Opt_D_dump_vect)
949 , ( "ddump-hpc", setDumpFlag Opt_D_dump_hpc)
950
951 , ( "dcore-lint", NoArg (setDynFlag Opt_DoCoreLinting))
952 , ( "dstg-lint", NoArg (setDynFlag Opt_DoStgLinting))
953 , ( "dcmm-lint", NoArg (setDynFlag Opt_DoCmmLinting))
954 , ( "dshow-passes", NoArg (do setDynFlag Opt_ForceRecomp
955 setVerbosity (Just 2)) )
956 , ( "dfaststring-stats", NoArg (setDynFlag Opt_D_faststring_stats))
957
958 ------ Machine dependant (-m<blah>) stuff ---------------------------
959
960 , ( "monly-2-regs", NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
961 , ( "monly-3-regs", NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
962 , ( "monly-4-regs", NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))
963
964 ------ Warning opts -------------------------------------------------
965 , ( "W" , NoArg (mapM_ setDynFlag minusWOpts) )
966 , ( "Werror" , NoArg (setDynFlag Opt_WarnIsError) )
967 , ( "Wall" , NoArg (mapM_ setDynFlag minusWallOpts) )
968 , ( "Wnot" , NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
969 , ( "w" , NoArg (mapM_ unSetDynFlag minusWallOpts) )
970
971 ------ Optimisation flags ------------------------------------------
972 , ( "O" , NoArg (upd (setOptLevel 1)))
973 , ( "Onot" , NoArg (upd (setOptLevel 0)))
974 , ( "O" , PrefixPred (all isDigit)
975 (\f -> upd (setOptLevel (read f))))
976
977 , ( "fmax-simplifier-iterations",
978 PrefixPred (all isDigit)
979 (\n -> upd (\dfs ->
980 dfs{ maxSimplIterations = read n })) )
981
982 , ( "frule-check",
983 SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
984
985 ------ Compiler flags -----------------------------------------------
986
987 , ( "fno-code", NoArg (setTarget HscNothing))
988 , ( "fasm", AnySuffix (\_ -> setTarget HscAsm) )
989 , ( "fvia-c", NoArg (setTarget HscC) )
990 , ( "fvia-C", NoArg (setTarget HscC) )
991
992 , ( "fglasgow-exts", NoArg (mapM_ setDynFlag glasgowExtsFlags) )
993 , ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )
994
995 , ( "fcontext-stack" , OptIntSuffix $ \mb_n -> upd $ \dfs ->
996 dfs{ ctxtStkDepth = mb_n `orElse` 3 })
997
998 -- the rest of the -f* and -fno-* flags
999 , ( "fno-", PrefixPred (\f -> isFFlag f) (\f -> unSetDynFlag (getFFlag f)) )
1000 , ( "f", PrefixPred (\f -> isFFlag f) (\f -> setDynFlag (getFFlag f)) )
1001 ]
1002
1003 -- these -f<blah> flags can all be reversed with -fno-<blah>
1004
1005 fFlags = [
1006 ( "warn-duplicate-exports", Opt_WarnDuplicateExports ),
1007 ( "warn-hi-shadowing", Opt_WarnHiShadows ),
1008 ( "warn-incomplete-patterns", Opt_WarnIncompletePatterns ),
1009 ( "warn-incomplete-record-updates", Opt_WarnIncompletePatternsRecUpd ),
1010 ( "warn-missing-fields", Opt_WarnMissingFields ),
1011 ( "warn-missing-methods", Opt_WarnMissingMethods ),
1012 ( "warn-missing-signatures", Opt_WarnMissingSigs ),
1013 ( "warn-name-shadowing", Opt_WarnNameShadowing ),
1014 ( "warn-overlapping-patterns", Opt_WarnOverlappingPatterns ),
1015 ( "warn-simple-patterns", Opt_WarnSimplePatterns ),
1016 ( "warn-type-defaults", Opt_WarnTypeDefaults ),
1017 ( "warn-unused-binds", Opt_WarnUnusedBinds ),
1018 ( "warn-unused-imports", Opt_WarnUnusedImports ),
1019 ( "warn-unused-matches", Opt_WarnUnusedMatches ),
1020 ( "warn-deprecations", Opt_WarnDeprecations ),
1021 ( "warn-orphans", Opt_WarnOrphans ),
1022 ( "fi", Opt_FFI ), -- support `-ffi'...
1023 ( "ffi", Opt_FFI ), -- ...and also `-fffi'
1024 ( "arrows", Opt_Arrows ), -- arrow syntax
1025 ( "parr", Opt_PArr ),
1026 ( "th", Opt_TH ),
1027 ( "implicit-prelude", Opt_ImplicitPrelude ),
1028 ( "scoped-type-variables", Opt_ScopedTypeVariables ),
1029 ( "bang-patterns", Opt_BangPatterns ),
1030 ( "indexed-types", Opt_IndexedTypes ),
1031 ( "monomorphism-restriction", Opt_MonomorphismRestriction ),
1032 ( "mono-pat-binds", Opt_MonoPatBinds ),
1033 ( "extended-default-rules", Opt_ExtendedDefaultRules ),
1034 ( "implicit-params", Opt_ImplicitParams ),
1035 ( "allow-overlapping-instances", Opt_AllowOverlappingInstances ),
1036 ( "allow-undecidable-instances", Opt_AllowUndecidableInstances ),
1037 ( "allow-incoherent-instances", Opt_AllowIncoherentInstances ),
1038 ( "generics", Opt_Generics ),
1039 ( "strictness", Opt_Strictness ),
1040 ( "full-laziness", Opt_FullLaziness ),
1041 ( "cse", Opt_CSE ),
1042 ( "ignore-interface-pragmas", Opt_IgnoreInterfacePragmas ),
1043 ( "omit-interface-pragmas", Opt_OmitInterfacePragmas ),
1044 ( "do-lambda-eta-expansion", Opt_DoLambdaEtaExpansion ),
1045 ( "ignore-asserts", Opt_IgnoreAsserts ),
1046 ( "ignore-breakpoints", Opt_IgnoreBreakpoints),
1047 ( "do-eta-reduction", Opt_DoEtaReduction ),
1048 ( "case-merge", Opt_CaseMerge ),
1049 ( "unbox-strict-fields", Opt_UnboxStrictFields ),
1050 ( "dicts-cheap", Opt_DictsCheap ),
1051 ( "excess-precision", Opt_ExcessPrecision ),
1052 ( "asm-mangling", Opt_DoAsmMangling ),
1053 ( "print-bind-result", Opt_PrintBindResult ),
1054 ( "force-recomp", Opt_ForceRecomp ),
1055 ( "hpc", Opt_Hpc ),
1056 ( "hpc-tracer", Opt_Hpc )
1057 ]
1058
1059
1060 glasgowExtsFlags = [
1061 Opt_GlasgowExts,
1062 Opt_FFI,
1063 Opt_ImplicitParams,
1064 Opt_ScopedTypeVariables,
1065 Opt_IndexedTypes ]
1066
1067 isFFlag f = f `elem` (map fst fFlags)
1068 getFFlag f = fromJust (lookup f fFlags)
1069
1070 -- -----------------------------------------------------------------------------
1071 -- Parsing the dynamic flags.
1072
1073 parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
1074 parseDynamicFlags dflags args = do
1075 let ((leftover,errs),dflags')
1076 = runCmdLine (processArgs dynamic_flags args) dflags
1077 when (not (null errs)) $ do
1078 throwDyn (UsageError (unlines errs))
1079 return (dflags', leftover)
1080
1081
1082 type DynP = CmdLineP DynFlags
1083
1084 upd :: (DynFlags -> DynFlags) -> DynP ()
1085 upd f = do
1086 dfs <- getCmdLineState
1087 putCmdLineState $! (f dfs)
1088
1089 setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
1090 setDynFlag f = upd (\dfs -> dopt_set dfs f)
1091 unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)
1092
1093 setDumpFlag :: DynFlag -> OptKind DynP
1094 setDumpFlag dump_flag
1095 = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1096 -- Whenver we -ddump, switch off the recompilation checker,
1097 -- else you don't see the dump!
1098
1099 setVerbosity :: Maybe Int -> DynP ()
1100 setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1101
1102 addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes = a : cmdlineHcIncludes s})
1103
1104 extraPkgConf_ p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })
1105
1106 exposePackage p =
1107 upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
1108 hidePackage p =
1109 upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
1110 ignorePackage p =
1111 upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1112
1113 setPackageName p
1114 | Nothing <- unpackPackageId pid
1115 = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
1116 | otherwise
1117 = \s -> s{ thisPackage = pid }
1118 where
1119 pid = stringToPackageId p
1120
1121 -- we can only switch between HscC, and HscAsmm with dynamic flags
1122 -- (-fvia-C, -fasm, -filx respectively).
1123 setTarget l = upd (\dfs -> case hscTarget dfs of
1124 HscC -> dfs{ hscTarget = l }
1125 HscAsm -> dfs{ hscTarget = l }
1126 _ -> dfs)
1127
1128 setOptLevel :: Int -> DynFlags -> DynFlags
1129 setOptLevel n dflags
1130 | hscTarget dflags == HscInterpreted && n > 0
1131 = dflags
1132 -- not in IO any more, oh well:
1133 -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
1134 | otherwise
1135 = updOptLevel n dflags
1136
1137
1138 setMainIs :: String -> DynP ()
1139 setMainIs arg
1140 | not (null main_fn) -- The arg looked like "Foo.baz"
1141 = upd $ \d -> d{ mainFunIs = Just main_fn,
1142 mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1143
1144 | isUpper (head main_mod) -- The arg looked like "Foo"
1145 = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1146
1147 | otherwise -- The arg looked like "baz"
1148 = upd $ \d -> d{ mainFunIs = Just main_mod }
1149 where
1150 (main_mod, main_fn) = splitLongestPrefix arg (== '.')
1151
1152 -----------------------------------------------------------------------------
1153 -- Paths & Libraries
1154
1155 -- -i on its own deletes the import paths
1156 addImportPath "" = upd (\s -> s{importPaths = []})
1157 addImportPath p = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})
1158
1159
1160 addLibraryPath p =
1161 upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})
1162
1163 addIncludePath p =
1164 upd (\s -> s{includePaths = includePaths s ++ splitPathList p})
1165
1166 addFrameworkPath p =
1167 upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})
1168
1169 split_marker = ':' -- not configurable (ToDo)
1170
1171 splitPathList :: String -> [String]
1172 splitPathList s = filter notNull (splitUp s)
1173 -- empty paths are ignored: there might be a trailing
1174 -- ':' in the initial list, for example. Empty paths can
1175 -- cause confusion when they are translated into -I options
1176 -- for passing to gcc.
1177 where
1178 #ifndef mingw32_TARGET_OS
1179 splitUp xs = split split_marker xs
1180 #else
1181 -- Windows: 'hybrid' support for DOS-style paths in directory lists.
1182 --
1183 -- That is, if "foo:bar:baz" is used, this interpreted as
1184 -- consisting of three entries, 'foo', 'bar', 'baz'.
1185 -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
1186 -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
1187 --
1188 -- Notice that no attempt is made to fully replace the 'standard'
1189 -- split marker ':' with the Windows / DOS one, ';'. The reason being
1190 -- that this will cause too much breakage for users & ':' will
1191 -- work fine even with DOS paths, if you're not insisting on being silly.
1192 -- So, use either.
1193 splitUp [] = []
1194 splitUp (x:':':div:xs) | div `elem` dir_markers
1195 = ((x:':':div:p): splitUp rs)
1196 where
1197 (p,rs) = findNextPath xs
1198 -- we used to check for existence of the path here, but that
1199 -- required the IO monad to be threaded through the command-line
1200 -- parser which is quite inconvenient. The
1201 splitUp xs = cons p (splitUp rs)
1202 where
1203 (p,rs) = findNextPath xs
1204
1205 cons "" xs = xs
1206 cons x xs = x:xs
1207
1208 -- will be called either when we've consumed nought or the
1209 -- "<Drive>:/" part of a DOS path, so splitting is just a Q of
1210 -- finding the next split marker.
1211 findNextPath xs =
1212 case break (`elem` split_markers) xs of
1213 (p, d:ds) -> (p, ds)
1214 (p, xs) -> (p, xs)
1215
1216 split_markers :: [Char]
1217 split_markers = [':', ';']
1218
1219 dir_markers :: [Char]
1220 dir_markers = ['/', '\\']
1221 #endif
1222
1223 -- -----------------------------------------------------------------------------
1224 -- tmpDir, where we store temporary files.
1225
1226 setTmpDir :: FilePath -> DynFlags -> DynFlags
1227 setTmpDir dir dflags = dflags{ tmpDir = canonicalise dir }
1228 where
1229 #if !defined(mingw32_HOST_OS)
1230 canonicalise p = normalisePath p
1231 #else
1232 -- Canonicalisation of temp path under win32 is a bit more
1233 -- involved: (a) strip trailing slash,
1234 -- (b) normalise slashes
1235 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
1236 --
1237 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
1238
1239 -- if we're operating under cygwin, and TMP/TEMP is of
1240 -- the form "/cygdrive/drive/path", translate this to
1241 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
1242 -- understand /cygdrive paths.)
1243 xltCygdrive path
1244 | "/cygdrive/" `isPrefixOf` path =
1245 case drop (length "/cygdrive/") path of
1246 drive:xs@('/':_) -> drive:':':xs
1247 _ -> path
1248 | otherwise = path
1249
1250 -- strip the trailing backslash (awful, but we only do this once).
1251 removeTrailingSlash path =
1252 case last path of
1253 '/' -> init path
1254 '\\' -> init path
1255 _ -> path
1256 #endif
1257
1258 -----------------------------------------------------------------------------
1259 -- Hpc stuff
1260
1261 setOptHpcDir :: String -> DynP ()
1262 setOptHpcDir arg = upd $ \ d -> d{hpcDir = arg}
1263
1264 -----------------------------------------------------------------------------
1265 -- Via-C compilation stuff
1266
1267 machdepCCOpts :: DynFlags -> ([String], -- flags for all C compilations
1268 [String]) -- for registerised HC compilations
1269 machdepCCOpts dflags
1270 #if alpha_TARGET_ARCH
1271 = ( ["-w", "-mieee"
1272 #ifdef HAVE_THREADED_RTS_SUPPORT
1273 , "-D_REENTRANT"
1274 #endif
1275 ], [] )
1276 -- For now, to suppress the gcc warning "call-clobbered
1277 -- register used for global register variable", we simply
1278 -- disable all warnings altogether using the -w flag. Oh well.
1279
1280 #elif hppa_TARGET_ARCH
1281 -- ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
1282 -- (very nice, but too bad the HP /usr/include files don't agree.)
1283 = ( ["-D_HPUX_SOURCE"], [] )
1284
1285 #elif m68k_TARGET_ARCH
1286 -- -fno-defer-pop : for the .hc files, we want all the pushing/
1287 -- popping of args to routines to be explicit; if we let things
1288 -- be deferred 'til after an STGJUMP, imminent death is certain!
1289 --
1290 -- -fomit-frame-pointer : *don't*
1291 -- It's better to have a6 completely tied up being a frame pointer
1292 -- rather than let GCC pick random things to do with it.
1293 -- (If we want to steal a6, then we would try to do things
1294 -- as on iX86, where we *do* steal the frame pointer [%ebp].)
1295 = ( [], ["-fno-defer-pop", "-fno-omit-frame-pointer"] )
1296
1297 #elif i386_TARGET_ARCH
1298 -- -fno-defer-pop : basically the same game as for m68k
1299 --
1300 -- -fomit-frame-pointer : *must* in .hc files; because we're stealing
1301 -- the fp (%ebp) for our register maps.
1302 = let n_regs = stolen_x86_regs dflags
1303 sta = opt_Static
1304 in
1305 ( [ if sta then "-DDONT_WANT_WIN32_DLL_SUPPORT" else ""
1306 -- , if suffixMatch "mingw32" cTARGETPLATFORM then "-mno-cygwin" else ""
1307 ],
1308 [ "-fno-defer-pop",
1309 #ifdef HAVE_GCC_MNO_OMIT_LFPTR
1310 -- Some gccs are configured with
1311 -- -momit-leaf-frame-pointer on by default, and it
1312 -- apparently takes precedence over
1313 -- -fomit-frame-pointer, so we disable it first here.
1314 "-mno-omit-leaf-frame-pointer",
1315 #endif
1316 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1317 "-fno-unit-at-a-time",
1318 -- unit-at-a-time doesn't do us any good, and screws
1319 -- up -split-objs by moving the split markers around.
1320 -- It's only turned on with -O2, but put it here just
1321 -- in case someone uses -optc-O2.
1322 #endif
1323 "-fomit-frame-pointer",
1324 -- we want -fno-builtin, because when gcc inlines
1325 -- built-in functions like memcpy() it tends to
1326 -- run out of registers, requiring -monly-n-regs
1327 "-fno-builtin",
1328 "-DSTOLEN_X86_REGS="++show n_regs ]
1329 )
1330
1331 #elif ia64_TARGET_ARCH
1332 = ( [], ["-fomit-frame-pointer", "-G0"] )
1333
1334 #elif x86_64_TARGET_ARCH
1335 = ( [], ["-fomit-frame-pointer",
1336 "-fno-asynchronous-unwind-tables",
1337 -- the unwind tables are unnecessary for HC code,
1338 -- and get in the way of -split-objs. Another option
1339 -- would be to throw them away in the mangler, but this
1340 -- is easier.
1341 #ifdef HAVE_GCC_HAS_NO_UNIT_AT_A_TIME
1342 "-fno-unit-at-a-time",
1343 -- unit-at-a-time doesn't do us any good, and screws
1344 -- up -split-objs by moving the split markers around.
1345 -- It's only turned on with -O2, but put it here just
1346 -- in case someone uses -optc-O2.
1347 #endif
1348 "-fno-builtin"
1349 -- calling builtins like strlen() using the FFI can
1350 -- cause gcc to run out of regs, so use the external
1351 -- version.
1352 ] )
1353
1354 #elif sparc_TARGET_ARCH
1355 = ( [], ["-w"] )
1356 -- For now, to suppress the gcc warning "call-clobbered
1357 -- register used for global register variable", we simply
1358 -- disable all warnings altogether using the -w flag. Oh well.
1359
1360 #elif powerpc_apple_darwin_TARGET
1361 -- -no-cpp-precomp:
1362 -- Disable Apple's precompiling preprocessor. It's a great thing
1363 -- for "normal" programs, but it doesn't support register variable
1364 -- declarations.
1365 = ( [], ["-no-cpp-precomp"] )
1366 #else
1367 = ( [], [] )
1368 #endif
1369
1370 picCCOpts :: DynFlags -> [String]
1371 picCCOpts dflags
1372 #if darwin_TARGET_OS
1373 -- Apple prefers to do things the other way round.
1374 -- PIC is on by default.
1375 -- -mdynamic-no-pic:
1376 -- Turn off PIC code generation.
1377 -- -fno-common:
1378 -- Don't generate "common" symbols - these are unwanted
1379 -- in dynamic libraries.
1380
1381 | opt_PIC
1382 = ["-fno-common"]
1383 | otherwise
1384 = ["-mdynamic-no-pic"]
1385 #elif mingw32_TARGET_OS
1386 -- no -fPIC for Windows
1387 = []
1388 #else
1389 | opt_PIC
1390 = ["-fPIC"]
1391 | otherwise
1392 = []
1393 #endif
1394
1395 -- -----------------------------------------------------------------------------
1396 -- Splitting
1397
1398 can_split :: Bool
1399 can_split =
1400 #if defined(i386_TARGET_ARCH) \
1401 || defined(x86_64_TARGET_ARCH) \
1402 || defined(alpha_TARGET_ARCH) \
1403 || defined(hppa_TARGET_ARCH) \
1404 || defined(m68k_TARGET_ARCH) \
1405 || defined(mips_TARGET_ARCH) \
1406 || defined(powerpc_TARGET_ARCH) \
1407 || defined(rs6000_TARGET_ARCH) \
1408 || defined(sparc_TARGET_ARCH)
1409 True
1410 #else
1411 False
1412 #endif
1413