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