DynFlags.hs 47.6 KB
Newer Older
1

2
{-# OPTIONS -fno-warn-missing-fields #-}
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
-----------------------------------------------------------------------------
--
-- Dynamic flags
--
-- Most flags are dynamic flags, which means they can change from
-- compilation to compilation using OPTIONS_GHC pragmas, and in a
-- multi-session GHC each session can be using different dynamic
-- flags.  Dynamic flags can also be set at the prompt in GHCi.
--
-- (c) The University of Glasgow 2005
--
-----------------------------------------------------------------------------

module DynFlags (
	-- Dynamic flags
	DynFlag(..),
	DynFlags(..),
20
	HscTarget(..), isObjectTarget,
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
	GhcMode(..), isOneShot,
	GhcLink(..), isNoLink,
	PackageFlag(..),
	Option(..),

	-- Configuration of the core-to-core and stg-to-stg phases
	CoreToDo(..),
	StgToDo(..),
	SimplifierSwitch(..), 
	SimplifierMode(..), FloatOutSwitches(..),
	getCoreToDo, getStgToDo,
	
	-- Manipulating DynFlags
	defaultDynFlags,		-- DynFlags
	initDynFlags,			-- DynFlags -> IO DynFlags

	dopt,				-- DynFlag -> DynFlags -> Bool
	dopt_set, dopt_unset,		-- DynFlags -> DynFlag -> DynFlags
	getOpts,			-- (DynFlags -> [a]) -> IO [a]
	getVerbFlag,
	updOptLevel,
42
	setTmpDir,
43
	setPackageName,
44 45 46
	
	-- parsing DynFlags
	parseDynamicFlags,
47
        allFlags,
48 49

	-- misc stuff
50
	machdepCCOpts, picCCOpts
51 52 53 54
  ) where

#include "HsVersions.h"

Simon Marlow's avatar
Simon Marlow committed
55 56
import Module		( Module, mkModuleName, mkModule )
import PackageConfig
57
import PrelNames	( mAIN )
Simon Marlow's avatar
Simon Marlow committed
58 59 60 61 62
#ifdef i386_TARGET_ARCH
import StaticFlags	( opt_Static )
#endif
import StaticFlags	( opt_PIC, WayName(..), v_Ways, v_Build_tag,
			  v_RTS_Build_tag )
63 64 65 66
import {-# SOURCE #-} Packages (PackageState)
import DriverPhases	( Phase(..), phaseInputExt )
import Config
import CmdLineParser
67
import Constants	( mAX_CONTEXT_REDUCTION_DEPTH )
68
import Panic		( panic, GhcException(..) )
69
import UniqFM           ( UniqFM )
70 71
import Util		( notNull, splitLongestPrefix, normalisePath )
import Maybes		( fromJust, orElse )
72
import SrcLoc           ( SrcSpan )
Simon Marlow's avatar
Simon Marlow committed
73 74
import Outputable
import {-# SOURCE #-} ErrUtils ( Severity(..), Message, mkLocMessage )
75

Simon Marlow's avatar
Simon Marlow committed
76 77 78
import Data.IORef	( readIORef )
import Control.Exception ( throwDyn )
import Control.Monad	( when )
79
#ifdef mingw32_TARGET_OS
80
import Data.List	( isPrefixOf )
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
81 82
#else
import Util		( split )
83
#endif
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
84

85
import Data.Char	( isUpper )
86 87
import System.IO        ( hPutStrLn, stderr )

88 89 90 91 92 93 94 95 96 97 98 99 100 101
-- -----------------------------------------------------------------------------
-- DynFlags

data DynFlag

   -- debugging flags
   = Opt_D_dump_cmm
   | Opt_D_dump_asm
   | Opt_D_dump_cpranal
   | Opt_D_dump_deriv
   | Opt_D_dump_ds
   | Opt_D_dump_flatC
   | Opt_D_dump_foreign
   | Opt_D_dump_inlinings
102
   | Opt_D_dump_rule_firings
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125
   | Opt_D_dump_occur_anal
   | Opt_D_dump_parsed
   | Opt_D_dump_rn
   | Opt_D_dump_simpl
   | Opt_D_dump_simpl_iterations
   | Opt_D_dump_spec
   | Opt_D_dump_prep
   | Opt_D_dump_stg
   | Opt_D_dump_stranal
   | Opt_D_dump_tc
   | Opt_D_dump_types
   | Opt_D_dump_rules
   | Opt_D_dump_cse
   | Opt_D_dump_worker_wrapper
   | Opt_D_dump_rn_trace
   | Opt_D_dump_rn_stats
   | Opt_D_dump_opt_cmm
   | Opt_D_dump_simpl_stats
   | Opt_D_dump_tc_trace
   | Opt_D_dump_if_trace
   | Opt_D_dump_splices
   | Opt_D_dump_BCOs
   | Opt_D_dump_vect
andy@galois.com's avatar
andy@galois.com committed
126
   | Opt_D_dump_hpc
127 128 129 130 131 132
   | Opt_D_source_stats
   | Opt_D_verbose_core2core
   | Opt_D_verbose_stg2stg
   | Opt_D_dump_hi
   | Opt_D_dump_hi_diffs
   | Opt_D_dump_minimal_imports
133
   | Opt_D_dump_mod_cycles
134
   | Opt_D_faststring_stats
135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
   | Opt_DoCoreLinting
   | Opt_DoStgLinting
   | Opt_DoCmmLinting

   | Opt_WarnIsError		-- -Werror; makes warnings fatal
   | Opt_WarnDuplicateExports
   | Opt_WarnHiShadows
   | Opt_WarnIncompletePatterns
   | Opt_WarnIncompletePatternsRecUpd
   | Opt_WarnMissingFields
   | Opt_WarnMissingMethods
   | Opt_WarnMissingSigs
   | Opt_WarnNameShadowing
   | Opt_WarnOverlappingPatterns
   | Opt_WarnSimplePatterns
   | Opt_WarnTypeDefaults
151
   | Opt_WarnMonomorphism
152 153 154 155 156 157
   | Opt_WarnUnusedBinds
   | Opt_WarnUnusedImports
   | Opt_WarnUnusedMatches
   | Opt_WarnDeprecations
   | Opt_WarnDodgyImports
   | Opt_WarnOrphans
158
   | Opt_WarnTabs
159 160 161 162 163 164

   -- language opts
   | Opt_AllowOverlappingInstances
   | Opt_AllowUndecidableInstances
   | Opt_AllowIncoherentInstances
   | Opt_MonomorphismRestriction
165
   | Opt_MonoPatBinds
166
   | Opt_ExtendedDefaultRules		-- Use GHC's extended rules for defaulting
167 168
   | Opt_GlasgowExts
   | Opt_FFI
169 170
   | Opt_PArr				-- Syntactic support for parallel arrays
   | Opt_Arrows				-- Arrow-notation syntax
171 172 173 174 175
   | Opt_TH
   | Opt_ImplicitParams
   | Opt_Generics
   | Opt_ImplicitPrelude 
   | Opt_ScopedTypeVariables
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
176
   | Opt_BangPatterns
chak@cse.unsw.edu.au.'s avatar
chak@cse.unsw.edu.au. committed
177
   | Opt_IndexedTypes
178
   | Opt_OverloadedStrings
179 180 181 182 183

   -- optimisation opts
   | Opt_Strictness
   | Opt_FullLaziness
   | Opt_CSE
184 185
   | Opt_LiberateCase
   | Opt_SpecConstr
186 187 188 189
   | Opt_IgnoreInterfacePragmas
   | Opt_OmitInterfacePragmas
   | Opt_DoLambdaEtaExpansion
   | Opt_IgnoreAsserts
190
   | Opt_IgnoreBreakpoints
191 192 193
   | Opt_DoEtaReduction
   | Opt_CaseMerge
   | Opt_UnboxStrictFields
194
   | Opt_DictsCheap
195
   | Opt_RewriteRules
196 197 198 199

   -- misc opts
   | Opt_Cpp
   | Opt_Pp
200
   | Opt_ForceRecomp
201 202 203 204 205 206 207
   | Opt_DryRun
   | Opt_DoAsmMangling
   | Opt_ExcessPrecision
   | Opt_ReadUserPackageConf
   | Opt_NoHsMain
   | Opt_SplitObjs
   | Opt_StgStats
208
   | Opt_HideAllPackages
209
   | Opt_PrintBindResult
210
   | Opt_Haddock
211
   | Opt_Hpc_No_Auto
212 213 214 215 216 217 218 219 220

   -- keeping stuff
   | Opt_KeepHiDiffs
   | Opt_KeepHcFiles
   | Opt_KeepSFiles
   | Opt_KeepRawSFiles
   | Opt_KeepTmpFiles

   deriving (Eq)
221
 
222 223 224 225 226 227 228 229 230 231 232 233
data DynFlags = DynFlags {
  ghcMode		:: GhcMode,
  ghcLink		:: GhcLink,
  coreToDo   		:: Maybe [CoreToDo], -- reserved for -Ofile
  stgToDo    		:: Maybe [StgToDo],  -- similarly
  hscTarget    		:: HscTarget,
  hscOutName 		:: String,  	-- name of the output file
  extCoreName		:: String,	-- name of the .core output file
  verbosity  		:: Int,	 	-- verbosity level
  optLevel		:: Int,		-- optimisation level
  maxSimplIterations    :: Int,		-- max simplifier iterations
  ruleCheck		:: Maybe String,
234 235

  specThreshold		:: Int,		-- Threshold for function specialisation
236

237 238 239
  stolen_x86_regs	:: Int,		
  cmdlineHcIncludes	:: [String],	-- -#includes
  importPaths		:: [FilePath],
240
  mainModIs		:: Module,
241
  mainFunIs		:: Maybe String,
242 243
  ctxtStkDepth	        :: Int,		-- Typechecker context stack depth

Simon Marlow's avatar
Simon Marlow committed
244
  thisPackage		:: PackageId,
245 246 247 248 249 250 251

  -- ways
  wayNames		:: [WayName],	-- way flags from the cmd line
  buildTag		:: String,	-- the global "way" (eg. "p" for prof)
  rtsBuildTag		:: String,	-- the RTS "way"
  
  -- paths etc.
252 253 254 255
  objectDir		:: Maybe String,
  hiDir			:: Maybe String,
  stubDir		:: Maybe String,

256 257 258
  objectSuf		:: String,
  hcSuf			:: String,
  hiSuf			:: String,
259 260 261 262

  outputFile		:: Maybe String,
  outputHi		:: Maybe String,

263 264 265 266
  includePaths		:: [String],
  libraryPaths		:: [String],
  frameworkPaths	:: [String],  	-- used on darwin only
  cmdlineFrameworks	:: [String],	-- ditto
267
  tmpDir		:: String,	-- no trailing '/'
268
  
269 270 271
  ghcUsagePath          :: FilePath,    -- Filled in by SysTools
  ghciUsagePath         :: FilePath,    -- ditto

andy@galois.com's avatar
andy@galois.com committed
272 273
  hpcDir		:: String,	-- ^ path to store the .mix files

274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294
  -- options for particular phases
  opt_L			:: [String],
  opt_P			:: [String],
  opt_F			:: [String],
  opt_c			:: [String],
  opt_m			:: [String],
  opt_a			:: [String],
  opt_l			:: [String],
  opt_dll		:: [String],
  opt_dep		:: [String],

  -- commands for particular phases
  pgm_L			:: String,
  pgm_P			:: (String,[Option]),
  pgm_F			:: String,
  pgm_c			:: (String,[Option]),
  pgm_m			:: (String,[Option]),
  pgm_s			:: (String,[Option]),
  pgm_a			:: (String,[Option]),
  pgm_l			:: (String,[Option]),
  pgm_dll		:: (String,[Option]),
295 296
  pgm_T                 :: String,
  pgm_sysman            :: String,
297

298
  --  Package flags
299
  extraPkgConfs		:: [FilePath],
300 301
  topDir                :: FilePath,    -- filled in by SysTools
  systemPackageConfig   :: FilePath,    -- ditto
302 303 304 305 306 307
	-- The -package-conf flags given on the command line, in the order
	-- they appeared.

  packageFlags		:: [PackageFlag],
	-- The -package and -hide-package flags from the command-line

308 309 310 311
  -- Package state
  -- NB. do not modify this field, it is calculated by 
  -- Packages.initPackages and Packages.updatePackages.
  pkgDatabase           :: Maybe (UniqFM InstalledPackageInfo),
312 313 314
  pkgState		:: PackageState,

  -- hsc dynamic flags
315 316 317 318
  flags      		:: [DynFlag],
  
  -- message output
  log_action            :: Severity -> SrcSpan -> PprStyle -> Message -> IO ()
319 320 321 322 323 324 325 326 327 328
 }

data HscTarget
  = HscC
  | HscAsm
  | HscJava
  | HscInterpreted
  | HscNothing
  deriving (Eq, Show)

329 330 331 332 333 334 335 336 337 338 339 340
-- | will this target result in an object file on the disk?
isObjectTarget :: HscTarget -> Bool
isObjectTarget HscC     = True
isObjectTarget HscAsm   = True
isObjectTarget _        = False

-- | The 'GhcMode' tells us whether we're doing multi-module
-- compilation (controlled via the "GHC" API) or one-shot
-- (single-module) compilation.  This makes a difference primarily to
-- the "Finder": in one-shot mode we look for interface files for
-- imported modules, but in multi-module mode we look for source files
-- in order to check whether they need to be recompiled.
341
data GhcMode
342 343 344
  = CompManager         -- ^ --make, GHCi, etc.
  | OneShot		-- ^ ghc -c Foo.hs
  | MkDepend            -- ^ ghc -M, see Finder for why we need this
345 346 347 348 349 350
  deriving Eq

isOneShot :: GhcMode -> Bool
isOneShot OneShot = True
isOneShot _other  = False

351
-- | What kind of linking to do.
352
data GhcLink	-- What to do in the link step, if there is one
353 354 355
  = NoLink		-- Don't link at all
  | LinkBinary		-- Link object code into a binary
  | LinkInMemory        -- Use the in-memory dynamic linker
356
  | MkDLL		-- Make a DLL
357
  deriving Eq
358 359 360 361 362 363 364 365 366

isNoLink :: GhcLink -> Bool
isNoLink NoLink = True
isNoLink other  = False

data PackageFlag
  = ExposePackage  String
  | HidePackage    String
  | IgnorePackage  String
367
  deriving Eq
368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385

defaultHscTarget
  | cGhcWithNativeCodeGen == "YES" 	=  HscAsm
  | otherwise				=  HscC

initDynFlags dflags = do
 -- someday these will be dynamic flags
 ways <- readIORef v_Ways
 build_tag <- readIORef v_Build_tag
 rts_build_tag <- readIORef v_RTS_Build_tag
 return dflags{
	wayNames	= ways,
	buildTag	= build_tag,
	rtsBuildTag	= rts_build_tag
	}

defaultDynFlags =
     DynFlags {
386 387
	ghcMode			= CompManager,
	ghcLink			= LinkBinary,
388 389 390 391 392 393 394 395 396
	coreToDo 		= Nothing,
	stgToDo			= Nothing, 
	hscTarget		= defaultHscTarget, 
	hscOutName		= "", 
	extCoreName		= "",
	verbosity		= 0, 
	optLevel		= 0,
	maxSimplIterations	= 4,
	ruleCheck		= Nothing,
397
	specThreshold		= 200,
398 399 400
	stolen_x86_regs		= 4,
	cmdlineHcIncludes	= [],
	importPaths		= ["."],
401
	mainModIs		= mAIN,
402
	mainFunIs		= Nothing,
403 404
	ctxtStkDepth		= mAX_CONTEXT_REDUCTION_DEPTH,

Simon Marlow's avatar
Simon Marlow committed
405
	thisPackage		= mainPackageId,
406

407 408 409 410
	objectDir		= Nothing,
	hiDir			= Nothing,
	stubDir			= Nothing,

411 412 413
	objectSuf		= phaseInputExt StopLn,
	hcSuf			= phaseInputExt HCc,
	hiSuf			= "hi",
414 415 416

	outputFile		= Nothing,
	outputHi		= Nothing,
417 418 419 420
	includePaths		= [],
	libraryPaths		= [],
	frameworkPaths		= [],
	cmdlineFrameworks	= [],
421
	tmpDir			= cDEFAULT_TMPDIR,
422
	
andy@galois.com's avatar
andy@galois.com committed
423 424
        hpcDir		        = ".hpc",

425 426 427 428 429 430 431 432 433 434 435 436
	opt_L			= [],
	opt_P			= [],
	opt_F			= [],
	opt_c			= [],
	opt_a			= [],
	opt_m			= [],
	opt_l			= [],
	opt_dll			= [],
	opt_dep			= [],
	
	extraPkgConfs		= [],
	packageFlags		= [],
437 438
        pkgDatabase             = Nothing,
        pkgState                = panic "no package state yet: call GHC.setSessionDynFlags",
439 440 441
	flags = [ 
    	    Opt_ReadUserPackageConf,
    
442 443 444 445
	    Opt_MonoPatBinds, 	-- Experimentally, I'm making this non-standard
				-- behaviour the default, to see if anyone notices
				-- SLPJ July 06

446 447
    	    Opt_ImplicitPrelude,
    	    Opt_MonomorphismRestriction,
448

449 450
    	    Opt_DoAsmMangling,
    
451
	    -- on by default:
452 453 454 455
	    Opt_PrintBindResult ]
	    ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns]
	    	    -- The default -O0 options
	    ++ standardWarnings,
456 457 458 459 460 461
               
        log_action = \severity srcSpan style msg -> 
                        case severity of
                          SevInfo  -> hPutStrLn stderr (show (msg style))
                          SevFatal -> hPutStrLn stderr (show (msg style))
                          _        -> hPutStrLn stderr ('\n':show ((mkLocMessage srcSpan msg) style))
462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492
      }

{- 
    Verbosity levels:
	
    0	|   print errors & warnings only
    1   |   minimal verbosity: print "compiling M ... done." for each module.
    2   |   equivalent to -dshow-passes
    3   |   equivalent to existing "ghc -v"
    4   |   "ghc -v -ddump-most"
    5   |   "ghc -v -ddump-all"
-}

dopt :: DynFlag -> DynFlags -> Bool
dopt f dflags  = f `elem` (flags dflags)

dopt_set :: DynFlags -> DynFlag -> DynFlags
dopt_set dfs f = dfs{ flags = f : flags dfs }

dopt_unset :: DynFlags -> DynFlag -> DynFlags
dopt_unset dfs f = dfs{ flags = filter (/= f) (flags dfs) }

getOpts :: DynFlags -> (DynFlags -> [a]) -> [a]
getOpts dflags opts = reverse (opts dflags)
	-- We add to the options from the front, so we need to reverse the list

getVerbFlag :: DynFlags -> String
getVerbFlag dflags 
  | verbosity dflags >= 3  = "-v" 
  | otherwise =  ""

493 494 495 496
setObjectDir  f d = d{ objectDir  = f}
setHiDir      f d = d{ hiDir      = f}
setStubDir    f d = d{ stubDir    = f}

497 498
setObjectSuf  f d = d{ objectSuf  = f}
setHiSuf      f d = d{ hiSuf      = f}
499 500 501 502
setHcSuf      f d = d{ hcSuf      = f}

setOutputFile f d = d{ outputFile = f}
setOutputHi   f d = d{ outputHi   = f}
503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551

-- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
-- Config.hs should really use Option.
setPgmP   f d = let (pgm:args) = words f in d{ pgm_P   = (pgm, map Option args)}

setPgmL   f d = d{ pgm_L   = f}
setPgmF   f d = d{ pgm_F   = f}
setPgmc   f d = d{ pgm_c   = (f,[])}
setPgmm   f d = d{ pgm_m   = (f,[])}
setPgms   f d = d{ pgm_s   = (f,[])}
setPgma   f d = d{ pgm_a   = (f,[])}
setPgml   f d = d{ pgm_l   = (f,[])}
setPgmdll f d = d{ pgm_dll = (f,[])}

addOptL   f d = d{ opt_L   = f : opt_L d}
addOptP   f d = d{ opt_P   = f : opt_P d}
addOptF   f d = d{ opt_F   = f : opt_F d}
addOptc   f d = d{ opt_c   = f : opt_c d}
addOptm   f d = d{ opt_m   = f : opt_m d}
addOpta   f d = d{ opt_a   = f : opt_a d}
addOptl   f d = d{ opt_l   = f : opt_l d}
addOptdll f d = d{ opt_dll = f : opt_dll d}
addOptdep f d = d{ opt_dep = f : opt_dep d}

addCmdlineFramework f d = d{ cmdlineFrameworks = f : cmdlineFrameworks d}

-- -----------------------------------------------------------------------------
-- Command-line options

-- When invoking external tools as part of the compilation pipeline, we
-- pass these a sequence of options on the command-line. Rather than
-- just using a list of Strings, we use a type that allows us to distinguish
-- between filepaths and 'other stuff'. [The reason being, of course, that
-- this type gives us a handle on transforming filenames, and filenames only,
-- to whatever format they're expected to be on a particular platform.]

data Option
 = FileOption -- an entry that _contains_ filename(s) / filepaths.
              String  -- a non-filepath prefix that shouldn't be 
		      -- transformed (e.g., "/out=")
 	      String  -- the filepath/filename portion
 | Option     String
 
-----------------------------------------------------------------------------
-- Setting the optimisation level

updOptLevel :: Int -> DynFlags -> DynFlags
-- Set dynflags appropriate to the optimisation level
updOptLevel n dfs
552
  = dfs2{ optLevel = n }
553 554 555 556
  where
   dfs1 = foldr (flip dopt_unset) dfs  remove_dopts
   dfs2 = foldr (flip dopt_set)   dfs1 extra_dopts

557 558
   extra_dopts  = [ f | (ns,f) <- optLevelFlags, n `elem` ns ]
   remove_dopts = [ f | (ns,f) <- optLevelFlags, n `notElem` ns ]
559
	
560 561 562 563
optLevelFlags :: [([Int], DynFlag)]
optLevelFlags
  = [ ([0],	Opt_IgnoreInterfacePragmas)
    , ([0],     Opt_OmitInterfacePragmas)
564

565
    , ([1,2],	Opt_IgnoreAsserts)
566 567
    , ([1,2],	Opt_RewriteRules)	-- Off for -O0; see Note [Scoping for Builtin rules]
					-- 		in PrelRules
568 569 570 571 572
    , ([1,2],	Opt_DoEtaReduction)
    , ([1,2],	Opt_CaseMerge)
    , ([1,2],	Opt_Strictness)
    , ([1,2],	Opt_CSE)
    , ([1,2],	Opt_FullLaziness)
573

574 575 576 577 578 579 580 581
    , ([2],	Opt_LiberateCase)
    , ([2],	Opt_SpecConstr)

    , ([0,1,2], Opt_DoLambdaEtaExpansion)
		-- This one is important for a tiresome reason:
		-- we want to make sure that the bindings for data 
		-- constructors are eta-expanded.  This is probably
		-- a good thing anyway, but it seems fragile.
582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
    ]

-- -----------------------------------------------------------------------------
-- Standard sets of warning options

standardWarnings
    = [ Opt_WarnDeprecations,
	Opt_WarnOverlappingPatterns,
	Opt_WarnMissingFields,
	Opt_WarnMissingMethods,
	Opt_WarnDuplicateExports
      ]

minusWOpts
    = standardWarnings ++ 
      [	Opt_WarnUnusedBinds,
	Opt_WarnUnusedMatches,
	Opt_WarnUnusedImports,
	Opt_WarnIncompletePatterns,
	Opt_WarnDodgyImports
      ]

minusWallOpts
    = minusWOpts ++
      [	Opt_WarnTypeDefaults,
	Opt_WarnNameShadowing,
	Opt_WarnMissingSigs,
	Opt_WarnHiShadows,
	Opt_WarnOrphans
      ]

-- -----------------------------------------------------------------------------
-- CoreToDo:  abstraction of core-to-core passes to run.

data CoreToDo		-- These are diff core-to-core passes,
			-- which may be invoked in any order,
  			-- as many times as you like.

  = CoreDoSimplify	-- The core-to-core simplifier.
	SimplifierMode
	[SimplifierSwitch]
			-- Each run of the simplifier can take a different
			-- set of simplifier-specific flags.
  | CoreDoFloatInwards
  | CoreDoFloatOutwards FloatOutSwitches
  | CoreLiberateCase
  | CoreDoPrintCore
  | CoreDoStaticArgs
  | CoreDoStrictness
  | CoreDoWorkerWrapper
  | CoreDoSpecialising
  | CoreDoSpecConstr
  | CoreDoOldStrictness
  | CoreDoGlomBinds
  | CoreCSE
  | CoreDoRuleCheck Int{-CompilerPhase-} String	-- Check for non-application of rules 
						-- matching this string
639 640
  | CoreDoNothing 		 -- Useful when building up 
  | CoreDoPasses [CoreToDo] 	 -- lists of these things
641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656

data SimplifierMode 		-- See comments in SimplMonad
  = SimplGently
  | SimplPhase Int

data SimplifierSwitch
  = MaxSimplifierIterations Int
  | NoCaseOfCase

data FloatOutSwitches
  = FloatOutSw  Bool 	-- True <=> float lambdas to top level
		Bool	-- True <=> float constants to top level,
			-- 	    even if they do not escape a lambda


-- The core-to-core pass ordering is derived from the DynFlags:
657 658 659
runWhen :: Bool -> CoreToDo -> CoreToDo
runWhen True  do_this = do_this
runWhen False do_this = CoreDoNothing
660 661 662 663 664 665 666 667 668 669 670

getCoreToDo :: DynFlags -> [CoreToDo]
getCoreToDo dflags
  | Just todo <- coreToDo dflags = todo -- set explicitly by user
  | otherwise = core_todo
  where
    opt_level  	  = optLevel dflags
    max_iter   	  = maxSimplIterations dflags
    strictness    = dopt Opt_Strictness dflags
    full_laziness = dopt Opt_FullLaziness dflags
    cse           = dopt Opt_CSE dflags
671 672
    spec_constr   = dopt Opt_SpecConstr dflags
    liberate_case = dopt Opt_LiberateCase dflags
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695
    rule_check    = ruleCheck dflags

    core_todo = 
     if opt_level == 0 then
      [
	CoreDoSimplify (SimplPhase 0) [
	    MaxSimplifierIterations max_iter
	]
      ]
     else {- opt_level >= 1 -} [ 

	-- initial simplify: mk specialiser happy: minimum effort please
	CoreDoSimplify SimplGently [
			-- 	Simplify "gently"
			-- Don't inline anything till full laziness has bitten
			-- In particular, inlining wrappers inhibits floating
			-- e.g. ...(case f x of ...)...
			--  ==> ...(case (case x of I# x# -> fw x#) of ...)...
			--  ==> ...(case x of I# x# -> case fw x# of ...)...
			-- and now the redex (f x) isn't floatable any more
			-- Similarly, don't apply any rules until after full 
			-- laziness.  Notably, list fusion can prevent floating.

simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
696 697
            NoCaseOfCase,	-- Don't do case-of-case transformations.
				-- This makes full laziness work better
698 699 700 701 702 703 704
	    MaxSimplifierIterations max_iter
	],

	-- Specialisation is best done before full laziness
	-- so that overloaded functions have all their dictionary lambdas manifest
	CoreDoSpecialising,

705
	runWhen full_laziness (CoreDoFloatOutwards (FloatOutSw False False)),
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743

	CoreDoFloatInwards,

	CoreDoSimplify (SimplPhase 2) [
		-- Want to run with inline phase 2 after the specialiser to give
		-- maximum chance for fusion to work before we inline build/augment
		-- in phase 1.  This made a difference in 'ansi' where an 
		-- overloaded function wasn't inlined till too late.
	   MaxSimplifierIterations max_iter
	],
	case rule_check of { Just pat -> CoreDoRuleCheck 2 pat; Nothing -> CoreDoNothing },

	CoreDoSimplify (SimplPhase 1) [
		-- Need inline-phase2 here so that build/augment get 
		-- inlined.  I found that spectral/hartel/genfft lost some useful
		-- strictness in the function sumcode' if augment is not inlined
		-- before strictness analysis runs
	   MaxSimplifierIterations max_iter
	],
	case rule_check of { Just pat -> CoreDoRuleCheck 1 pat; Nothing -> CoreDoNothing },

	CoreDoSimplify (SimplPhase 0) [
		-- Phase 0: allow all Ids to be inlined now
		-- This gets foldr inlined before strictness analysis

	   MaxSimplifierIterations 3
		-- At least 3 iterations because otherwise we land up with
		-- huge dead expressions because of an infelicity in the 
		-- simpifier.   
		--	let k = BIG in foldr k z xs
		-- ==>  let k = BIG in letrec go = \xs -> ...(k x).... in go xs
		-- ==>  let k = BIG in letrec go = \xs -> ...(BIG x).... in go xs
		-- Don't stop now!

	],
	case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },

#ifdef OLD_STRICTNESS
744
	CoreDoOldStrictness,
745
#endif
746 747 748 749 750 751 752 753 754 755 756
	runWhen strictness (CoreDoPasses [
		CoreDoStrictness,
		CoreDoWorkerWrapper,
		CoreDoGlomBinds,
		CoreDoSimplify (SimplPhase 0) [
		   MaxSimplifierIterations max_iter
		]]),

	runWhen full_laziness 
	  (CoreDoFloatOutwards (FloatOutSw False    -- Not lambdas
					   True)),  -- Float constants
757 758 759 760 761 762 763
		-- nofib/spectral/hartel/wang doubles in speed if you
		-- do full laziness late in the day.  It only happens
		-- after fusion and other stuff, so the early pass doesn't
		-- catch it.  For the record, the redex is 
		--	  f_el22 (f_el21 r_midblock)


764 765 766 767
	runWhen cse CoreCSE,
		-- We want CSE to follow the final full-laziness pass, because it may
		-- succeed in commoning up things floated out by full laziness.
		-- CSE used to rely on the no-shadowing invariant, but it doesn't any more
768 769 770

	CoreDoFloatInwards,

771
	case rule_check of { Just pat -> CoreDoRuleCheck 0 pat; Nothing -> CoreDoNothing },
772

773 774 775 776 777
		-- Case-liberation for -O2.  This should be after
		-- strictness analysis and the simplification which follows it.
	runWhen liberate_case (CoreDoPasses [
	    CoreLiberateCase,
	    CoreDoSimplify (SimplPhase 0) [
778
		  MaxSimplifierIterations max_iter
779
	    ] ]),	-- Run the simplifier after LiberateCase to vastly 
780 781 782
			-- reduce the possiblility of shadowing
			-- Reason: see Note [Shadowing] in SpecConstr.lhs

783
	runWhen spec_constr CoreDoSpecConstr,
784 785

	-- Final clean-up simplification:
786
     	CoreDoSimplify (SimplPhase 0) [
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816
	  MaxSimplifierIterations max_iter
	]
     ]

-- -----------------------------------------------------------------------------
-- StgToDo:  abstraction of stg-to-stg passes to run.

data StgToDo
  = StgDoMassageForProfiling  -- should be (next to) last
  -- There's also setStgVarInfo, but its absolute "lastness"
  -- is so critical that it is hardwired in (no flag).
  | D_stg_stats

getStgToDo :: DynFlags -> [StgToDo]
getStgToDo dflags
  | Just todo <- stgToDo dflags = todo -- set explicitly by user
  | otherwise = todo2
  where
	stg_stats = dopt Opt_StgStats dflags

	todo1 = if stg_stats then [D_stg_stats] else []

	todo2 | WayProf `elem` wayNames dflags
	      = StgDoMassageForProfiling : todo1
	      | otherwise
	      = todo1

-- -----------------------------------------------------------------------------
-- DynFlags parser

817 818 819 820 821 822 823 824 825
allFlags :: [String]
allFlags = map ('-':) $
           [ name | (name, optkind) <- dynamic_flags, ok optkind ] ++
           map ("fno-"++) flags ++
           map ("f"++) flags
    where ok (PrefixPred _ _) = False
          ok _ = True
          flags = map fst fFlags

826 827 828 829 830 831
dynamic_flags :: [(String, OptKind DynP)]
dynamic_flags = [
     ( "n"              , NoArg  (setDynFlag Opt_DryRun) )
  ,  ( "cpp"		, NoArg  (setDynFlag Opt_Cpp))
  ,  ( "F"		, NoArg  (setDynFlag Opt_Pp))
  ,  ( "#include"	, HasArg (addCmdlineHCInclude) )
832
  ,  ( "v"		, OptIntSuffix setVerbosity )
833

834 835 836 837 838 839 840 841 842 843 844 845 846 847
        ------- Specific phases  --------------------------------------------
  ,  ( "pgmL"           , HasArg (upd . setPgmL) )  
  ,  ( "pgmP"           , HasArg (upd . setPgmP) )  
  ,  ( "pgmF"           , HasArg (upd . setPgmF) )  
  ,  ( "pgmc"           , HasArg (upd . setPgmc) )  
  ,  ( "pgmm"           , HasArg (upd . setPgmm) )  
  ,  ( "pgms"           , HasArg (upd . setPgms) )  
  ,  ( "pgma"           , HasArg (upd . setPgma) )  
  ,  ( "pgml"           , HasArg (upd . setPgml) )  
  ,  ( "pgmdll"		, HasArg (upd . setPgmdll) )

  ,  ( "optL"		, HasArg (upd . addOptL) )  
  ,  ( "optP"		, HasArg (upd . addOptP) )  
  ,  ( "optF"           , HasArg (upd . addOptF) )  
848
  ,  ( "optc"		, HasArg (upd . addOptc) )  
849 850 851 852 853 854
  ,  ( "optm"		, HasArg (upd . addOptm) )  
  ,  ( "opta"		, HasArg (upd . addOpta) )  
  ,  ( "optl"		, HasArg (upd . addOptl) )  
  ,  ( "optdll"		, HasArg (upd . addOptdll) )  
  ,  ( "optdep"		, HasArg (upd . addOptdep) )

855 856 857 858
  ,  ( "split-objs"	, NoArg (if can_split
				    then setDynFlag Opt_SplitObjs
				    else return ()) )

859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874
	-------- Linking ----------------------------------------------------
  ,  ( "c"		, NoArg (upd $ \d -> d{ ghcLink=NoLink } ))
  ,  ( "no-link"	, NoArg (upd $ \d -> d{ ghcLink=NoLink } )) -- Dep.
  ,  ( "-mk-dll"	, NoArg (upd $ \d -> d{ ghcLink=MkDLL } ))

	------- Libraries ---------------------------------------------------
  ,  ( "L"		, Prefix addLibraryPath )
  ,  ( "l"		, AnySuffix (\s -> do upd (addOptl s)
					      upd (addOptdll s)))

	------- Frameworks --------------------------------------------------
        -- -framework-path should really be -F ...
  ,  ( "framework-path" , HasArg addFrameworkPath )
  ,  ( "framework"	, HasArg (upd . addCmdlineFramework) )

	------- Output Redirection ------------------------------------------
875
  ,  ( "odir"		, HasArg (upd . setObjectDir  . Just))
876 877 878 879 880 881 882
  ,  ( "o"		, SepArg (upd . setOutputFile . Just))
  ,  ( "ohi"		, HasArg (upd . setOutputHi   . Just ))
  ,  ( "osuf"		, HasArg (upd . setObjectSuf))
  ,  ( "hcsuf"		, HasArg (upd . setHcSuf))
  ,  ( "hisuf"		, HasArg (upd . setHiSuf))
  ,  ( "hidir"		, HasArg (upd . setHiDir . Just))
  ,  ( "tmpdir"		, HasArg (upd . setTmpDir))
883
  ,  ( "stubdir"	, HasArg (upd . setStubDir . Just))
884 885

	------- Keeping temporary files -------------------------------------
886 887
  ,  ( "keep-hc-file"   , AnySuffix (\_ -> setDynFlag Opt_KeepHcFiles))
  ,  ( "keep-s-file"    , AnySuffix (\_ -> setDynFlag Opt_KeepSFiles))
888 889 890 891 892 893
  ,  ( "keep-raw-s-file", AnySuffix (\_ -> setDynFlag Opt_KeepRawSFiles))
  ,  ( "keep-tmp-files" , AnySuffix (\_ -> setDynFlag Opt_KeepTmpFiles))

	------- Miscellaneous ----------------------------------------------
  ,  ( "no-hs-main"     , NoArg (setDynFlag Opt_NoHsMain))
  ,  ( "main-is"   	, SepArg setMainIs )
894
  ,  ( "haddock"	, NoArg (setDynFlag Opt_Haddock) )
andy@galois.com's avatar
andy@galois.com committed
895
  ,  ( "hpcdir"		, SepArg setOptHpcDir )
896

897 898 899
	------- recompilation checker (DEPRECATED, use -fforce-recomp) -----
  ,  ( "recomp"		, NoArg (unSetDynFlag Opt_ForceRecomp) )
  ,  ( "no-recomp"  	, NoArg (setDynFlag   Opt_ForceRecomp) )
900 901 902 903

        ------- Packages ----------------------------------------------------
  ,  ( "package-conf"   , HasArg extraPkgConf_ )
  ,  ( "no-user-package-conf", NoArg (unSetDynFlag Opt_ReadUserPackageConf) )
904
  ,  ( "package-name"   , HasArg (upd . setPackageName) )
905 906
  ,  ( "package"        , HasArg exposePackage )
  ,  ( "hide-package"   , HasArg hidePackage )
907
  ,  ( "hide-all-packages", NoArg (setDynFlag Opt_HideAllPackages) )
908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
  ,  ( "ignore-package" , HasArg ignorePackage )
  ,  ( "syslib"         , HasArg exposePackage )  -- for compatibility

	------ HsCpp opts ---------------------------------------------------
  ,  ( "D",		AnySuffix (upd . addOptP) )
  ,  ( "U",		AnySuffix (upd . addOptP) )

	------- Include/Import Paths ----------------------------------------
  ,  ( "I" 		, Prefix    addIncludePath)
  ,  ( "i"		, OptPrefix addImportPath )

	------ Debugging ----------------------------------------------------
  ,  ( "dstg-stats",	NoArg (setDynFlag Opt_StgStats))

  ,  ( "ddump-cmm",         	 setDumpFlag Opt_D_dump_cmm)
  ,  ( "ddump-asm",          	 setDumpFlag Opt_D_dump_asm)
  ,  ( "ddump-cpranal",      	 setDumpFlag Opt_D_dump_cpranal)
  ,  ( "ddump-deriv",        	 setDumpFlag Opt_D_dump_deriv)
  ,  ( "ddump-ds",           	 setDumpFlag Opt_D_dump_ds)
  ,  ( "ddump-flatC",        	 setDumpFlag Opt_D_dump_flatC)
  ,  ( "ddump-foreign",      	 setDumpFlag Opt_D_dump_foreign)
  ,  ( "ddump-inlinings",    	 setDumpFlag Opt_D_dump_inlinings)
930
  ,  ( "ddump-rule-firings",   	 setDumpFlag Opt_D_dump_rule_firings)
931 932 933 934 935 936 937 938 939 940 941 942 943 944
  ,  ( "ddump-occur-anal",   	 setDumpFlag Opt_D_dump_occur_anal)
  ,  ( "ddump-parsed",       	 setDumpFlag Opt_D_dump_parsed)
  ,  ( "ddump-rn",           	 setDumpFlag Opt_D_dump_rn)
  ,  ( "ddump-simpl",        	 setDumpFlag Opt_D_dump_simpl)
  ,  ( "ddump-simpl-iterations", setDumpFlag Opt_D_dump_simpl_iterations)
  ,  ( "ddump-spec",         	 setDumpFlag Opt_D_dump_spec)
  ,  ( "ddump-prep",          	 setDumpFlag Opt_D_dump_prep)
  ,  ( "ddump-stg",          	 setDumpFlag Opt_D_dump_stg)
  ,  ( "ddump-stranal",      	 setDumpFlag Opt_D_dump_stranal)
  ,  ( "ddump-tc",           	 setDumpFlag Opt_D_dump_tc)
  ,  ( "ddump-types",        	 setDumpFlag Opt_D_dump_types)
  ,  ( "ddump-rules",        	 setDumpFlag Opt_D_dump_rules)
  ,  ( "ddump-cse",          	 setDumpFlag Opt_D_dump_cse)
  ,  ( "ddump-worker-wrapper",   setDumpFlag Opt_D_dump_worker_wrapper)
945 946
  ,  ( "ddump-rn-trace",         setDumpFlag Opt_D_dump_rn_trace)
  ,  ( "ddump-if-trace",         setDumpFlag Opt_D_dump_if_trace)
947 948
  ,  ( "ddump-tc-trace",         setDumpFlag Opt_D_dump_tc_trace)
  ,  ( "ddump-splices",          setDumpFlag Opt_D_dump_splices)
949
  ,  ( "ddump-rn-stats",         setDumpFlag Opt_D_dump_rn_stats)
950 951 952 953 954 955
  ,  ( "ddump-opt-cmm",          setDumpFlag Opt_D_dump_opt_cmm)
  ,  ( "ddump-simpl-stats",      setDumpFlag Opt_D_dump_simpl_stats)
  ,  ( "ddump-bcos",             setDumpFlag Opt_D_dump_BCOs)
  ,  ( "dsource-stats",          setDumpFlag Opt_D_source_stats)
  ,  ( "dverbose-core2core",     setDumpFlag Opt_D_verbose_core2core)
  ,  ( "dverbose-stg2stg",       setDumpFlag Opt_D_verbose_stg2stg)
956
  ,  ( "ddump-hi-diffs",         setDumpFlag Opt_D_dump_hi_diffs)
957
  ,  ( "ddump-hi",               setDumpFlag Opt_D_dump_hi)
958
  ,  ( "ddump-minimal-imports",  setDumpFlag Opt_D_dump_minimal_imports)
959
  ,  ( "ddump-vect",         	 setDumpFlag Opt_D_dump_vect)
andy@galois.com's avatar
andy@galois.com committed
960
  ,  ( "ddump-hpc",         	 setDumpFlag Opt_D_dump_hpc)
961
  ,  ( "ddump-mod-cycles",     	 setDumpFlag Opt_D_dump_mod_cycles)
andy@galois.com's avatar
andy@galois.com committed
962
  
963 964 965
  ,  ( "dcore-lint",       	 NoArg (setDynFlag Opt_DoCoreLinting))
  ,  ( "dstg-lint",        	 NoArg (setDynFlag Opt_DoStgLinting))
  ,  ( "dcmm-lint",		 NoArg (setDynFlag Opt_DoCmmLinting))
966
  ,  ( "dshow-passes",           NoArg (do setDynFlag Opt_ForceRecomp
967
				           setVerbosity (Just 2)) )
968
  ,  ( "dfaststring-stats",	 NoArg (setDynFlag Opt_D_faststring_stats))
969 970 971 972 973 974 975 976 977 978 979 980 981 982 983

	------ Machine dependant (-m<blah>) stuff ---------------------------

  ,  ( "monly-2-regs", 	NoArg (upd (\s -> s{stolen_x86_regs = 2}) ))
  ,  ( "monly-3-regs", 	NoArg (upd (\s -> s{stolen_x86_regs = 3}) ))
  ,  ( "monly-4-regs", 	NoArg (upd (\s -> s{stolen_x86_regs = 4}) ))

	------ Warning opts -------------------------------------------------
  ,  ( "W"		, NoArg (mapM_ setDynFlag   minusWOpts)    )
  ,  ( "Werror"		, NoArg (setDynFlag   	    Opt_WarnIsError) )
  ,  ( "Wall"		, NoArg (mapM_ setDynFlag   minusWallOpts) )
  ,  ( "Wnot"		, NoArg (mapM_ unSetDynFlag minusWallOpts) ) /* DEPREC */
  ,  ( "w"		, NoArg (mapM_ unSetDynFlag minusWallOpts) )

	------ Optimisation flags ------------------------------------------
984 985 986 987
  ,  ( "O"	, NoArg (upd (setOptLevel 1)))
  ,  ( "Onot"	, NoArg (upd (setOptLevel 0)))
  ,  ( "O"	, OptIntSuffix (\mb_n -> upd (setOptLevel (mb_n `orElse` 1))))
		-- If the number is missing, use 1
988

989 990
  ,  ( "fmax-simplifier-iterations", IntSuffix (\n -> 
		upd (\dfs -> dfs{ maxSimplIterations = n })) )
991 992 993 994 995

	-- liberate-case-threshold is an old flag for '-fspec-threshold'
  ,  ( "fspec-threshold",          IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))
  ,  ( "fliberate-case-threshold", IntSuffix (\n -> upd (\dfs -> dfs{ specThreshold = n })))

996 997
  ,  ( "frule-check", SepArg (\s -> upd (\dfs -> dfs{ ruleCheck = Just s })))
  ,  ( "fcontext-stack"	, IntSuffix $ \n -> upd $ \dfs -> dfs{ ctxtStkDepth = n })
998 999 1000

        ------ Compiler flags -----------------------------------------------

1001 1002 1003 1004
  ,  ( "fasm",		AnySuffix (\_ -> setObjTarget HscAsm) )
  ,  ( "fvia-c",	NoArg (setObjTarget HscC) )
  ,  ( "fvia-C",	NoArg (setObjTarget HscC) )

1005
  ,  ( "fno-code",	NoArg (setTarget HscNothing))
1006 1007
  ,  ( "fbyte-code",    NoArg (setTarget HscInterpreted) )
  ,  ( "fobject-code",  NoArg (setTarget defaultHscTarget) )
1008 1009 1010 1011

  ,  ( "fglasgow-exts",    NoArg (mapM_ setDynFlag   glasgowExtsFlags) )
  ,  ( "fno-glasgow-exts", NoArg (mapM_ unSetDynFlag glasgowExtsFlags) )

1012

1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
	-- the rest of the -f* and -fno-* flags
  ,  ( "fno-", 		PrefixPred (\f -> isFFlag f) (\f -> unSetDynFlag (getFFlag f)) )
  ,  ( "f",		PrefixPred (\f -> isFFlag f) (\f -> setDynFlag (getFFlag f)) )
 ]

-- these -f<blah> flags can all be reversed with -fno-<blah>

fFlags = [
  ( "warn-duplicate-exports",    	Opt_WarnDuplicateExports ),
  ( "warn-hi-shadowing",         	Opt_WarnHiShadows ),
  ( "warn-incomplete-patterns",  	Opt_WarnIncompletePatterns ),
  ( "warn-incomplete-record-updates",  	Opt_WarnIncompletePatternsRecUpd ),
  ( "warn-missing-fields",       	Opt_WarnMissingFields ),
  ( "warn-missing-methods",      	Opt_WarnMissingMethods ),
  ( "warn-missing-signatures",   	Opt_WarnMissingSigs ),
  ( "warn-name-shadowing",       	Opt_WarnNameShadowing ),
  ( "warn-overlapping-patterns", 	Opt_WarnOverlappingPatterns ),
  ( "warn-simple-patterns",      	Opt_WarnSimplePatterns ),
  ( "warn-type-defaults",        	Opt_WarnTypeDefaults ),
1032
  ( "warn-monomorphism-restriction",   	Opt_WarnMonomorphism ),
1033 1034 1035 1036 1037
  ( "warn-unused-binds",         	Opt_WarnUnusedBinds ),
  ( "warn-unused-imports",       	Opt_WarnUnusedImports ),
  ( "warn-unused-matches",       	Opt_WarnUnusedMatches ),
  ( "warn-deprecations",         	Opt_WarnDeprecations ),
  ( "warn-orphans",	         	Opt_WarnOrphans ),
1038
  ( "warn-tabs",	         	Opt_WarnTabs ),
1039 1040 1041 1042 1043 1044 1045
  ( "fi",				Opt_FFI ),  -- support `-ffi'...
  ( "ffi",				Opt_FFI ),  -- ...and also `-fffi'
  ( "arrows",				Opt_Arrows ), -- arrow syntax
  ( "parr",				Opt_PArr ),
  ( "th",				Opt_TH ),
  ( "implicit-prelude",  		Opt_ImplicitPrelude ),
  ( "scoped-type-variables",  		Opt_ScopedTypeVariables ),
simonpj@microsoft.com's avatar
simonpj@microsoft.com committed
1046
  ( "bang-patterns",	  		Opt_BangPatterns ),
1047
  ( "overloaded-strings",		Opt_OverloadedStrings ),
chak@cse.unsw.edu.au.'s avatar
chak@cse.unsw.edu.au. committed
1048
  ( "indexed-types",	  		Opt_IndexedTypes ),
1049
  ( "monomorphism-restriction",		Opt_MonomorphismRestriction ),
1050
  ( "mono-pat-binds",			Opt_MonoPatBinds ),
1051
  ( "extended-default-rules",		Opt_ExtendedDefaultRules ),
1052 1053 1054 1055 1056 1057 1058
  ( "implicit-params",			Opt_ImplicitParams ),
  ( "allow-overlapping-instances", 	Opt_AllowOverlappingInstances ),
  ( "allow-undecidable-instances", 	Opt_AllowUndecidableInstances ),
  ( "allow-incoherent-instances", 	Opt_AllowIncoherentInstances ),
  ( "generics",  			Opt_Generics ),
  ( "strictness",			Opt_Strictness ),
  ( "full-laziness",			Opt_FullLaziness ),
1059 1060
  ( "liberate-case",			Opt_LiberateCase ),
  ( "spec-constr",			Opt_SpecConstr ),
1061 1062 1063 1064 1065
  ( "cse",				Opt_CSE ),
  ( "ignore-interface-pragmas",		Opt_IgnoreInterfacePragmas ),
  ( "omit-interface-pragmas",		Opt_OmitInterfacePragmas ),
  ( "do-lambda-eta-expansion",		Opt_DoLambdaEtaExpansion ),
  ( "ignore-asserts",			Opt_IgnoreAsserts ),
1066
  ( "ignore-breakpoints",               Opt_IgnoreBreakpoints),
1067 1068 1069
  ( "do-eta-reduction",			Opt_DoEtaReduction ),
  ( "case-merge",			Opt_CaseMerge ),
  ( "unbox-strict-fields",		Opt_UnboxStrictFields ),
1070
  ( "dicts-cheap",			Opt_DictsCheap ),
1071
  ( "excess-precision",			Opt_ExcessPrecision ),
1072
  ( "asm-mangling",			Opt_DoAsmMangling ),
1073
  ( "print-bind-result",		Opt_PrintBindResult ),
1074
  ( "force-recomp",			Opt_ForceRecomp ),
1075 1076
  ( "hpc-no-auto",			Opt_Hpc_No_Auto ),
  ( "rewrite-rules",			Opt_RewriteRules )
1077 1078
  ]

1079

1080 1081 1082 1083
glasgowExtsFlags = [ 
  Opt_GlasgowExts, 
  Opt_FFI, 
  Opt_ImplicitParams, 
chak@cse.unsw.edu.au.'s avatar
chak@cse.unsw.edu.au. committed
1084 1085
  Opt_ScopedTypeVariables,
  Opt_IndexedTypes ]
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114

isFFlag f = f `elem` (map fst fFlags)
getFFlag f = fromJust (lookup f fFlags)

-- -----------------------------------------------------------------------------
-- Parsing the dynamic flags.

parseDynamicFlags :: DynFlags -> [String] -> IO (DynFlags,[String])
parseDynamicFlags dflags args = do
  let ((leftover,errs),dflags') 
	  = runCmdLine (processArgs dynamic_flags args) dflags
  when (not (null errs)) $ do
    throwDyn (UsageError (unlines errs))
  return (dflags', leftover)


type DynP = CmdLineP DynFlags

upd :: (DynFlags -> DynFlags) -> DynP ()
upd f = do 
   dfs <- getCmdLineState
   putCmdLineState $! (f dfs)

setDynFlag, unSetDynFlag :: DynFlag -> DynP ()
setDynFlag f   = upd (\dfs -> dopt_set dfs f)
unSetDynFlag f = upd (\dfs -> dopt_unset dfs f)

setDumpFlag :: DynFlag -> OptKind DynP
setDumpFlag dump_flag 
1115
  = NoArg (setDynFlag Opt_ForceRecomp >> setDynFlag dump_flag)
1116 1117 1118
	-- Whenver we -ddump, switch off the recompilation checker,
	-- else you don't see the dump!

1119 1120
setVerbosity :: Maybe Int -> DynP ()
setVerbosity mb_n = upd (\dfs -> dfs{ verbosity = mb_n `orElse` 3 })
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131

addCmdlineHCInclude a = upd (\s -> s{cmdlineHcIncludes =  a : cmdlineHcIncludes s})

extraPkgConf_  p = upd (\s -> s{ extraPkgConfs = p : extraPkgConfs s })

exposePackage p = 
  upd (\s -> s{ packageFlags = ExposePackage p : packageFlags s })
hidePackage p = 
  upd (\s -> s{ packageFlags = HidePackage p : packageFlags s })
ignorePackage p = 
  upd (\s -> s{ packageFlags = IgnorePackage p : packageFlags s })
1132

Simon Marlow's avatar
Simon Marlow committed
1133 1134 1135 1136
setPackageName p
  | Nothing <- unpackPackageId pid
  = throwDyn (CmdLineError ("cannot parse \'" ++ p ++ "\' as a package identifier"))
  | otherwise
1137
  = \s -> s{ thisPackage = pid }
Simon Marlow's avatar
Simon Marlow committed
1138 1139
  where
        pid = stringToPackageId p
1140

1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
-- If we're linking a binary, then only targets that produce object
-- code are allowed (requests for other target types are ignored).
setTarget l = upd set
  where 
   set dfs 
     | ghcLink dfs /= LinkBinary || isObjectTarget l  = dfs{ hscTarget = l }
     | otherwise = dfs

-- Changes the target only if we're compiling object code.  This is
-- used by -fasm and -fvia-C, which switch from one to the other, but
-- not from bytecode to object-code.  The idea is that -fasm/-fvia-C
-- can be safely used in an OPTIONS_GHC pragma.
setObjTarget l = upd set
  where 
   set dfs 
     | isObjectTarget (hscTarget dfs) = dfs { hscTarget = l }
     | otherwise = dfs
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170

setOptLevel :: Int -> DynFlags -> DynFlags
setOptLevel n dflags
   | hscTarget dflags == HscInterpreted && n > 0
	= dflags
	    -- not in IO any more, oh well:
	    -- putStr "warning: -O conflicts with --interactive; -O ignored.\n"
   | otherwise
	= updOptLevel n dflags


setMainIs :: String -> DynP ()
setMainIs arg
1171
  | not (null main_fn)		-- The arg looked like "Foo.baz"
1172
  = upd $ \d -> d{ mainFunIs = Just main_fn,
Simon Marlow's avatar
Simon Marlow committed
1173
	  	   mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1174

1175
  | isUpper (head main_mod)	-- The arg looked like "Foo"
Simon Marlow's avatar
Simon Marlow committed
1176
  = upd $ \d -> d{ mainModIs = mkModule mainPackageId (mkModuleName main_mod) }
1177 1178
  
  | otherwise			-- The arg looked like "baz"
1179
  = upd $ \d -> d{ mainFunIs = Just main_mod }
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223
  where
    (main_mod, main_fn) = splitLongestPrefix arg (== '.')

-----------------------------------------------------------------------------
-- Paths & Libraries

-- -i on its own deletes the import paths
addImportPath "" = upd (\s -> s{importPaths = []})
addImportPath p  = upd (\s -> s{importPaths = importPaths s ++ splitPathList p})


addLibraryPath p = 
  upd (\s -> s{libraryPaths = libraryPaths s ++ splitPathList p})

addIncludePath p = 
  upd (\s -> s{includePaths = includePaths s ++ splitPathList p})

addFrameworkPath p = 
  upd (\s -> s{frameworkPaths = frameworkPaths s ++ splitPathList p})

split_marker = ':'   -- not configurable (ToDo)

splitPathList :: String -> [String]
splitPathList s = filter notNull (splitUp s)
		-- empty paths are ignored: there might be a trailing
		-- ':' in the initial list, for example.  Empty paths can
		-- cause confusion when they are translated into -I options
		-- for passing to gcc.
  where
#ifndef mingw32_TARGET_OS
    splitUp xs = split split_marker xs
#else 
     -- Windows: 'hybrid' support for DOS-style paths in directory lists.
     -- 
     -- That is, if "foo:bar:baz" is used, this interpreted as
     -- consisting of three entries, 'foo', 'bar', 'baz'.
     -- However, with "c:/foo:c:\\foo;x:/bar", this is interpreted
     -- as 3 elts, "c:/foo", "c:\\foo", "x:/bar"
     --
     -- Notice that no attempt is made to fully replace the 'standard'
     -- split marker ':' with the Windows / DOS one, ';'. The reason being
     -- that this will cause too much breakage for users & ':' will
     -- work fine even with DOS paths, if you're not insisting on being silly.
     -- So, use either.
1224 1225 1226 1227 1228
    splitUp []             = []
    splitUp (x:':':div:xs) | div `elem` dir_markers
			   = ((x:':':div:p): splitUp rs)
			   where
			      (p,rs) = findNextPath xs
1229 1230 1231
	  -- we used to check for existence of the path here, but that
	  -- required the IO monad to be threaded through the command-line
   	  -- parser which is quite inconvenient.  The