1 -----------------------------------------------------------------------------
5 -- (c) The University of Glasgow 2005
7 -----------------------------------------------------------------------------
9 module DriverPipeline (
10 -- Run a series of compilation steps in a pipeline, for a
11 -- collection of source files.
14 -- Interfaces for the batch-mode driver
17 -- Interfaces for the compilation manager (interpreted/batch-mode)
19 compile, CompResult(..),
25 getOptionsFromStringBuffer, -- used in module GHC
26 optionsErrorMsgs, -- ditto
29 #include "HsVersions.h"
34 import SysTools ( newTempName, addFilesToClean, getSysMan, copy )
35 import qualified SysTools
43 import StaticFlags ( v_Ld_inputs, opt_Static, WayName(..) )
47 import StringBuffer ( hGetStringBuffer )
48 import BasicTypes ( SuccessFlag(..) )
49 import Maybes ( expectJust )
50 import Ctype ( is_ident )
51 import StringBuffer ( StringBuffer(..), lexemeToString )
52 import ParserCoreUtils ( getCoreModuleName )
53 import SrcLoc ( srcLocSpan, mkSrcLoc )
54 import FastString ( mkFastString )
55 import Bag ( listToBag, emptyBag )
56 import SrcLoc ( Located(..) )
58 import Distribution.Compiler ( extensionsToGHCFlag )
61 import DATA_IOREF ( readIORef, writeIORef, IORef )
62 import GLAEXTS ( Int(..) )
71 -- ---------------------------------------------------------------------------
74 -- Just preprocess a file, put the result in a temp. file (used by the
75 -- compilation manager during the summary phase).
77 -- We return the augmented DynFlags, because they contain the result
78 -- of slurping in the OPTIONS pragmas
80 preprocess :: DynFlags -> (FilePath, Maybe Phase) -> IO (DynFlags, FilePath)
81 preprocess dflags (filename, mb_phase) =
82 ASSERT2(isJust mb_phase || isHaskellSrcFilename filename, text filename)
83 runPipeline anyHsc dflags (filename, mb_phase) Temporary Nothing{-no ModLocation-}
85 -- ---------------------------------------------------------------------------
88 -- Compile a single module, under the control of the compilation manager.
90 -- This is the interface between the compilation manager and the
91 -- compiler proper (hsc), where we deal with tedious details like
92 -- reading the OPTIONS pragma from the source file, and passing the
93 -- output of hsc through the C compiler.
95 -- NB. No old interface can also mean that the source has changed.
99 -> Maybe Linkable -- Just linkable <=> source unchanged
100 -> Maybe ModIface -- Old interface, if available
105 = CompOK ModDetails -- New details
106 ModIface -- New iface
107 (Maybe Linkable) -- a Maybe, for the same reasons as hm_linkable
112 compile hsc_env mod_summary maybe_old_linkable old_iface mod_index nmods = do
114 let dflags0 = hsc_dflags hsc_env
115 this_mod = ms_mod mod_summary
116 src_flavour = ms_hsc_src mod_summary
119 | Just l <- maybe_old_linkable, isObjectLinkable l = True
122 showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary)
124 let location = ms_location mod_summary
125 let input_fn = expectJust "compile:hs" (ml_hs_file location)
126 let input_fnpp = expectJust "compile:hspp" (ms_hspp_file mod_summary)
128 debugTraceMsg dflags0 2 (text "compile: input file" <+> text input_fnpp)
130 -- Add in the OPTIONS from the source file
131 -- This is nasty: we've done this once already, in the compilation manager
132 -- It might be better to cache the flags in the ml_hspp_file field,say
133 let hspp_buf = expectJust "compile:hspp_buf" (ms_hspp_buf mod_summary)
134 opts = getOptionsFromStringBuffer hspp_buf input_fn
135 (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 (map snd opts)
136 if (not (null unhandled_flags))
137 then do printErrorsAndWarnings dflags1 (optionsErrorMsgs unhandled_flags opts input_fn)
141 let (basename, _) = splitFilename input_fn
143 -- We add the directory in which the .hs files resides) to the import path.
144 -- This is needed when we try to compile the .hc file later, if it
145 -- imports a _stub.h file that we created here.
146 let current_dir = directoryOf basename
147 old_paths = includePaths dflags1
148 dflags = dflags1 { includePaths = current_dir : old_paths }
150 -- Figure out what lang we're generating
151 let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags)
152 -- ... and what the next phase should be
153 let next_phase = hscNextPhase dflags src_flavour hsc_lang
154 -- ... and what file to generate the output into
155 output_fn <- getOutputFilename dflags next_phase
156 Temporary basename next_phase (Just location)
158 let dflags' = dflags { hscTarget = hsc_lang,
159 hscOutName = output_fn,
160 extCoreName = basename ++ ".hcr" }
162 -- -no-recomp should also work with --make
163 let do_recomp = dopt Opt_RecompChecking dflags
164 source_unchanged = isJust maybe_old_linkable && do_recomp
165 hsc_env' = hsc_env { hsc_dflags = dflags' }
166 object_filename = ml_obj_file location
169 hsc_result <- hscMain hsc_env' mod_summary
170 source_unchanged have_object old_iface
171 (Just (mod_index, nmods))
174 HscFail -> return CompErrs
176 HscNoRecomp details iface ->
177 ASSERT(isJust maybe_old_linkable)
178 return (CompOK details iface maybe_old_linkable)
180 HscRecomp details iface stub_h_exists stub_c_exists maybe_interpreted_code
182 | isHsBoot src_flavour -- No further compilation to do
183 -> do case hsc_lang of
184 HscInterpreted -> return ()
185 _other -> SysTools.touch dflags' "Touching object file"
187 return (CompOK details iface Nothing)
189 | otherwise -- Normal source file
192 if stub_c_exists then do
193 stub_o <- compileStub dflags' this_mod location
194 return [ DotO stub_o ]
198 (hs_unlinked, unlinked_time) <-
201 -- in interpreted mode, just return the compiled code
202 -- as our "unlinked" object.
204 -> case maybe_interpreted_code of
206 Just comp_bc -> return ([BCOs comp_bc], ms_hs_date mod_summary)
207 -- Why do we use the timestamp of the source file here,
208 -- rather than the current time? This works better in
209 -- the case where the local clock is out of sync
210 -- with the filesystem's clock. It's just as accurate:
211 -- if the source is modified, then the linkable will
214 Nothing -> panic "compile: no interpreted code"
217 -> return ([], ms_hs_date mod_summary)
219 -- We're in --make mode: finish the compilation pipeline.
221 -> do runPipeline StopLn dflags (output_fn,Nothing) Persistent
223 -- The object filename comes from the ModLocation
225 o_time <- getModificationTime object_filename
226 return ([DotO object_filename], o_time)
228 let linkable = LM unlinked_time this_mod
229 (hs_unlinked ++ stub_unlinked)
231 return (CompOK details iface (Just linkable))
233 -----------------------------------------------------------------------------
234 -- stub .h and .c files (for foreign export support)
236 -- The _stub.c file is derived from the haskell source file, possibly taking
237 -- into account the -stubdir option.
239 -- Consequently, we derive the _stub.o filename from the haskell object
242 -- This isn't necessarily the same as the object filename we
243 -- would get if we just compiled the _stub.c file using the pipeline.
246 -- ghc src/A.hs -odir obj
248 -- results in obj/A.o, and src/A_stub.c. If we compile src/A_stub.c with
249 -- -odir obj, we would get obj/src/A_stub.o, which is wrong; we want
252 compileStub :: DynFlags -> Module -> ModLocation -> IO FilePath
253 compileStub dflags mod location = do
254 let (o_base, o_ext) = splitFilename (ml_obj_file location)
255 stub_o = o_base ++ "_stub" `joinFileExt` o_ext
257 -- compile the _stub.c file w/ gcc
258 let (stub_c,_) = mkStubPaths dflags mod location
259 runPipeline StopLn dflags (stub_c,Nothing)
260 (SpecificFile stub_o) Nothing{-no ModLocation-}
265 -- ---------------------------------------------------------------------------
268 link :: GhcMode -- interactive or batch
269 -> DynFlags -- dynamic flags
270 -> Bool -- attempt linking in batch mode?
271 -> HomePackageTable -- what to link
274 -- For the moment, in the batch linker, we don't bother to tell doLink
275 -- which packages to link -- it just tries all that are available.
276 -- batch_attempt_linking should only be *looked at* in batch mode. It
277 -- should only be True if the upsweep was successful and someone
278 -- exports main, i.e., we have good reason to believe that linking
282 link Interactive dflags batch_attempt_linking hpt
283 = do -- Not Linking...(demand linker will do the job)
287 link JustTypecheck dflags batch_attempt_linking hpt
290 link BatchCompile dflags batch_attempt_linking hpt
291 | batch_attempt_linking
294 home_mod_infos = moduleEnvElts hpt
296 -- the packages we depend on
297 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
299 -- the linkables to link
300 linkables = map (fromJust.hm_linkable) home_mod_infos
302 debugTraceMsg dflags 3 (text "link: linkables are ..." $$ vcat (map ppr linkables))
304 -- check for the -no-link flag
305 if isNoLink (ghcLink dflags)
306 then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).")
310 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
311 obj_files = concatMap getOfiles linkables
313 exe_file = exeFileName dflags
315 -- if the modification time on the executable is later than the
316 -- modification times on all of the objects, then omit linking
317 -- (unless the -no-recomp flag was given).
318 e_exe_time <- IO.try $ getModificationTime exe_file
320 | Left _ <- e_exe_time = True
321 | Right t <- e_exe_time =
322 any (t <) (map linkableTime linkables)
324 if dopt Opt_RecompChecking dflags && not linking_needed
325 then do debugTraceMsg dflags 1 (text exe_file <+> ptext SLIT("is up to date, linking not required."))
329 debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file
332 -- Don't showPass in Batch mode; doLink will do that for us.
333 let link = case ghcLink dflags of
335 StaticLink -> staticLink
336 link dflags obj_files pkg_deps
338 debugTraceMsg dflags 3 (text "link: done")
340 -- staticLink only returns if it succeeds
344 = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$
345 text " Main.main not exported; not linking.")
349 -- -----------------------------------------------------------------------------
350 -- Compile files in one-shot mode.
352 oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO ()
353 oneShot dflags stop_phase srcs = do
354 o_files <- mapM (compileFile dflags stop_phase) srcs
355 doLink dflags stop_phase o_files
357 compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath
358 compileFile dflags stop_phase (src, mb_phase) = do
359 exists <- doesFileExist src
361 throwDyn (CmdLineError ("does not exist: " ++ src))
364 split = dopt Opt_SplitObjs dflags
365 mb_o_file = outputFile dflags
366 ghc_link = ghcLink dflags -- Set by -c or -no-link
368 -- When linking, the -o argument refers to the linker's output.
369 -- otherwise, we use it as the name for the pipeline's output.
371 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
372 -- -o foo applies to linker
373 | Just o_file <- mb_o_file = SpecificFile o_file
374 -- -o foo applies to the file we are compiling now
375 | otherwise = Persistent
377 stop_phase' = case stop_phase of
378 As | split -> SplitAs
381 (_, out_file) <- runPipeline stop_phase' dflags
382 (src, mb_phase) output Nothing{-no ModLocation-}
386 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
387 doLink dflags stop_phase o_files
388 | not (isStopLn stop_phase)
389 = return () -- We stopped before the linking phase
392 = case ghcLink dflags of
394 StaticLink -> staticLink dflags o_files link_pkgs
395 MkDLL -> doMkDLL dflags o_files link_pkgs
397 -- Always link in the haskell98 package for static linking. Other
398 -- packages have to be specified via the -package flag.
400 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
404 -- ---------------------------------------------------------------------------
405 -- Run a compilation pipeline, consisting of multiple phases.
407 -- This is the interface to the compilation pipeline, which runs
408 -- a series of compilation steps on a single source file, specifying
409 -- at which stage to stop.
411 -- The DynFlags can be modified by phases in the pipeline (eg. by
412 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
417 -- output should be to a temporary file: we're going to
418 -- run more compilation steps on this output later
420 -- we want a persistent file, i.e. a file in the current directory
421 -- derived from the input filename, but with the appropriate extension.
422 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
423 | SpecificFile FilePath
424 -- the output must go into the specified file.
427 :: Phase -- When to stop
428 -> DynFlags -- Dynamic flags
429 -> (FilePath,Maybe Phase) -- Input filename (and maybe -x suffix)
430 -> PipelineOutput -- Output filename
431 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
432 -> IO (DynFlags, FilePath) -- (final flags, output filename)
434 runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc
436 let (basename, suffix) = splitFilename input_fn
438 -- If we were given a -x flag, then use that phase to start from
440 | Just x_phase <- mb_phase = x_phase
441 | otherwise = startPhase suffix
443 -- We want to catch cases of "you can't get there from here" before
444 -- we start the pipeline, because otherwise it will just run off the
447 -- There is a partial ordering on phases, where A < B iff A occurs
448 -- before B in a normal compilation pipeline.
450 when (not (start_phase `happensBefore` stop_phase)) $
452 ("cannot compile this file to desired target: "
455 -- this is a function which will be used to calculate output file names
456 -- as we go along (we partially apply it to some of its inputs here)
457 let get_output_fn = getOutputFilename dflags stop_phase output basename
459 -- Execute the pipeline...
460 (dflags', output_fn, maybe_loc) <-
461 pipeLoop dflags start_phase stop_phase input_fn
462 basename suffix get_output_fn maybe_loc
464 -- Sometimes, a compilation phase doesn't actually generate any output
465 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
466 -- stage, but we wanted to keep the output, then we have to explicitly
470 return (dflags', output_fn)
472 do final_fn <- get_output_fn stop_phase maybe_loc
473 when (final_fn /= output_fn) $
474 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
475 ++ "'") output_fn final_fn
476 return (dflags', final_fn)
480 pipeLoop :: DynFlags -> Phase -> Phase
481 -> FilePath -> String -> Suffix
482 -> (Phase -> Maybe ModLocation -> IO FilePath)
484 -> IO (DynFlags, FilePath, Maybe ModLocation)
486 pipeLoop dflags phase stop_phase
487 input_fn orig_basename orig_suff
488 orig_get_output_fn maybe_loc
490 | phase `eqPhase` stop_phase -- All done
491 = return (dflags, input_fn, maybe_loc)
493 | not (phase `happensBefore` stop_phase)
494 -- Something has gone wrong. We'll try to cover all the cases when
495 -- this could happen, so if we reach here it is a panic.
496 -- eg. it might happen if the -C flag is used on a source file that
497 -- has {-# OPTIONS -fasm #-}.
498 = panic ("pipeLoop: at phase " ++ show phase ++
499 " but I wanted to stop at phase " ++ show stop_phase)
502 = do { (next_phase, dflags', maybe_loc, output_fn)
503 <- runPhase phase stop_phase dflags orig_basename
504 orig_suff input_fn orig_get_output_fn maybe_loc
505 ; pipeLoop dflags' next_phase stop_phase output_fn
506 orig_basename orig_suff orig_get_output_fn maybe_loc }
509 :: DynFlags -> Phase -> PipelineOutput -> String
510 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
511 getOutputFilename dflags stop_phase output basename
515 odir = objectDir dflags
516 osuf = objectSuf dflags
517 keep_hc = dopt Opt_KeepHcFiles dflags
518 keep_raw_s = dopt Opt_KeepRawSFiles dflags
519 keep_s = dopt Opt_KeepSFiles dflags
521 myPhaseInputExt HCc = hcsuf
522 myPhaseInputExt StopLn = osuf
523 myPhaseInputExt other = phaseInputExt other
525 func next_phase maybe_location
526 | is_last_phase, Persistent <- output = persistent_fn
527 | is_last_phase, SpecificFile f <- output = return f
528 | keep_this_output = persistent_fn
529 | otherwise = newTempName dflags suffix
531 is_last_phase = next_phase `eqPhase` stop_phase
533 -- sometimes, we keep output from intermediate stages
537 Mangle | keep_raw_s -> True
539 HCc | keep_hc -> True
542 suffix = myPhaseInputExt next_phase
544 -- persistent object files get put in odir
546 | StopLn <- next_phase = return odir_persistent
547 | otherwise = return persistent
549 persistent = basename `joinFileExt` suffix
552 | Just loc <- maybe_location = ml_obj_file loc
553 | Just d <- odir = d `joinFileName` persistent
554 | otherwise = persistent
557 -- -----------------------------------------------------------------------------
558 -- Each phase in the pipeline returns the next phase to execute, and the
559 -- name of the file in which the output was placed.
561 -- We must do things dynamically this way, because we often don't know
562 -- what the rest of the phases will be until part-way through the
563 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
564 -- of a source file can change the latter stages of the pipeline from
565 -- taking the via-C route to using the native code generator.
567 runPhase :: Phase -- Do this phase first
568 -> Phase -- Stop just before this phase
570 -> String -- basename of original input source
571 -> String -- its extension
572 -> FilePath -- name of file which contains the input to this phase.
573 -> (Phase -> Maybe ModLocation -> IO FilePath)
574 -- how to calculate the output filename
575 -> Maybe ModLocation -- the ModLocation, if we have one
576 -> IO (Phase, -- next phase
577 DynFlags, -- new dynamic flags
578 Maybe ModLocation, -- the ModLocation, if we have one
579 FilePath) -- output filename
581 -- Invariant: the output filename always contains the output
582 -- Interesting case: Hsc when there is no recompilation to do
583 -- Then the output filename is still a .o file
585 -------------------------------------------------------------------------------
588 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
589 = do let unlit_flags = getOpts dflags opt_L
590 -- The -h option passes the file name for unlit to put in a #line directive
591 output_fn <- get_output_fn (Cpp sf) maybe_loc
593 SysTools.runUnlit dflags
594 (map SysTools.Option unlit_flags ++
595 [ SysTools.Option "-h"
596 , SysTools.Option input_fn
597 , SysTools.FileOption "" input_fn
598 , SysTools.FileOption "" output_fn
601 return (Cpp sf, dflags, maybe_loc, output_fn)
603 -------------------------------------------------------------------------------
604 -- Cpp phase : (a) gets OPTIONS out of file
605 -- (b) runs cpp if necessary
607 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
608 = do src_opts <- getOptionsFromSource input_fn
609 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
610 checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff)
612 if not (dopt Opt_Cpp dflags) then
613 -- no need to preprocess CPP, just pass input file along
614 -- to the next phase of the pipeline.
615 return (HsPp sf, dflags, maybe_loc, input_fn)
617 output_fn <- get_output_fn (HsPp sf) maybe_loc
618 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
619 return (HsPp sf, dflags, maybe_loc, output_fn)
621 -------------------------------------------------------------------------------
624 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
625 = do if not (dopt Opt_Pp dflags) then
626 -- no need to preprocess, just pass input file along
627 -- to the next phase of the pipeline.
628 return (Hsc sf, dflags, maybe_loc, input_fn)
630 let hspp_opts = getOpts dflags opt_F
631 let orig_fn = basename `joinFileExt` suff
632 output_fn <- get_output_fn (Hsc sf) maybe_loc
633 SysTools.runPp dflags
634 ( [ SysTools.Option orig_fn
635 , SysTools.Option input_fn
636 , SysTools.FileOption "" output_fn
638 map SysTools.Option hspp_opts
640 return (Hsc sf, dflags, maybe_loc, output_fn)
642 -----------------------------------------------------------------------------
645 -- Compilation of a single module, in "legacy" mode (_not_ under
646 -- the direction of the compilation manager).
647 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
648 = do -- normal Hsc mode, not mkdependHS
650 -- we add the current directory (i.e. the directory in which
651 -- the .hs files resides) to the import path, since this is
652 -- what gcc does, and it's probably what you want.
653 let current_dir = directoryOf basename
655 paths = includePaths dflags0
656 dflags = dflags0 { includePaths = current_dir : paths }
658 -- gather the imports and module name
659 (hspp_buf,mod_name) <-
661 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
662 ; m <- getCoreModuleName input_fn
663 ; return (Nothing, mkModule m) }
665 other -> do { buf <- hGetStringBuffer input_fn
666 ; (_,_,L _ mod_name) <- getImports dflags buf input_fn
667 ; return (Just buf, mod_name) }
669 -- Build a ModLocation to pass to hscMain.
670 -- The source filename is rather irrelevant by now, but it's used
671 -- by hscMain for messages. hscMain also needs
672 -- the .hi and .o filenames, and this is as good a way
673 -- as any to generate them, and better than most. (e.g. takes
674 -- into accout the -osuf flags)
675 location1 <- mkHomeModLocation2 dflags mod_name basename suff
677 -- Boot-ify it if necessary
678 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
679 | otherwise = location1
682 -- Take -ohi into account if present
683 -- This can't be done in mkHomeModuleLocation because
684 -- it only applies to the module being compiles
685 let ohi = outputHi dflags
686 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
687 | otherwise = location2
689 -- Take -o into account if present
690 -- Very like -ohi, but we must *only* do this if we aren't linking
691 -- (If we're linking then the -o applies to the linked thing, not to
692 -- the object file for one module.)
693 -- Note the nasty duplication with the same computation in compileFile above
694 let expl_o_file = outputFile dflags
695 location4 | Just ofile <- expl_o_file
696 , isNoLink (ghcLink dflags)
697 = location3 { ml_obj_file = ofile }
698 | otherwise = location3
700 -- Make the ModSummary to hand to hscMain
701 src_timestamp <- getModificationTime (basename `joinFileExt` suff)
703 unused_field = panic "runPhase:ModSummary field"
704 -- Some fields are not looked at by hscMain
705 mod_summary = ModSummary { ms_mod = mod_name,
706 ms_hsc_src = src_flavour,
707 ms_hspp_file = Just input_fn,
708 ms_hspp_buf = hspp_buf,
709 ms_location = location4,
710 ms_hs_date = src_timestamp,
711 ms_obj_date = Nothing,
712 ms_imps = unused_field,
713 ms_srcimps = unused_field }
715 o_file = ml_obj_file location4 -- The real object file
718 -- Figure out if the source has changed, for recompilation avoidance.
720 -- Setting source_unchanged to True means that M.o seems
721 -- to be up to date wrt M.hs; so no need to recompile unless imports have
722 -- changed (which the compiler itself figures out).
723 -- Setting source_unchanged to False tells the compiler that M.o is out of
724 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
725 let do_recomp = dopt Opt_RecompChecking dflags
727 if not do_recomp || not (isStopLn stop)
728 -- Set source_unchanged to False unconditionally if
729 -- (a) recompilation checker is off, or
730 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
732 -- Otherwise look at file modification dates
733 else do o_file_exists <- doesFileExist o_file
735 then return False -- Need to recompile
736 else do t2 <- getModificationTime o_file
737 if t2 > src_timestamp
742 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
743 let next_phase = hscNextPhase dflags src_flavour hsc_lang
744 output_fn <- get_output_fn next_phase (Just location4)
746 let dflags' = dflags { hscTarget = hsc_lang,
747 hscOutName = output_fn,
748 extCoreName = basename ++ ".hcr" }
750 hsc_env <- newHscEnv dflags'
752 -- Tell the finder cache about this module
753 addHomeModuleToFinder hsc_env mod_name location4
756 result <- hscMain hsc_env
757 mod_summary source_unchanged
758 False -- No object file
760 Nothing -- No "module i of n" progress info
764 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
766 HscNoRecomp details iface -> do
767 SysTools.touch dflags' "Touching object file" o_file
768 -- The .o file must have a later modification date
769 -- than the source file (else we wouldn't be in HscNoRecomp)
770 -- but we touch it anyway, to keep 'make' happy (we think).
771 return (StopLn, dflags', Just location4, o_file)
773 HscRecomp _details _iface
774 stub_h_exists stub_c_exists
775 _maybe_interpreted_code -> do
777 when stub_c_exists $ do
778 stub_o <- compileStub dflags' mod_name location4
779 consIORef v_Ld_inputs stub_o
781 -- In the case of hs-boot files, generate a dummy .o-boot
782 -- stamp file for the benefit of Make
784 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
787 return (next_phase, dflags', Just location4, output_fn)
789 -----------------------------------------------------------------------------
792 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
794 output_fn <- get_output_fn Cmm maybe_loc
795 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
796 return (Cmm, dflags, maybe_loc, output_fn)
798 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
800 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
801 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
802 output_fn <- get_output_fn next_phase maybe_loc
804 let dflags' = dflags { hscTarget = hsc_lang,
805 hscOutName = output_fn,
806 extCoreName = basename ++ ".hcr" }
808 ok <- hscCmmFile dflags' input_fn
810 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
812 return (next_phase, dflags, maybe_loc, output_fn)
814 -----------------------------------------------------------------------------
817 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
818 -- way too many hacks, and I can't say I've ever used it anyway.
820 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
821 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
822 = do let cc_opts = getOpts dflags opt_c
823 hcc = cc_phase `eqPhase` HCc
825 let cmdline_include_paths = includePaths dflags
827 -- HC files have the dependent packages stamped into them
828 pkgs <- if hcc then getHCFilePackages input_fn else return []
830 -- add package include paths even if we're just compiling .c
831 -- files; this is the Value Add(TM) that using ghc instead of
833 pkg_include_dirs <- getPackageIncludePath dflags pkgs
834 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
835 (cmdline_include_paths ++ pkg_include_dirs)
837 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
838 let pic_c_flags = picCCOpts dflags
840 let verb = getVerbFlag dflags
842 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
844 let split_objs = dopt Opt_SplitObjs dflags
845 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
848 let excessPrecision = dopt Opt_ExcessPrecision dflags
852 let mangle = dopt Opt_DoAsmMangling dflags
854 | hcc && mangle = Mangle
856 output_fn <- get_output_fn next_phase maybe_loc
861 -- on x86 the floating point regs have greater precision
862 -- than a double, which leads to unpredictable results.
863 -- By default, we turn this off with -ffloat-store unless
864 -- the user specified -fexcess-precision.
865 (if excessPrecision then [] else [ "-ffloat-store" ]) ++
867 -- gcc's -fstrict-aliasing allows two accesses to memory
868 -- to be considered non-aliasing if they have different types.
869 -- This interacts badly with the C code we generate, which is
870 -- very weakly typed, being derived from C--.
871 ["-fno-strict-aliasing"]
875 SysTools.runCc dflags (
876 -- force the C compiler to interpret this file as C when
877 -- compiling .hc files, by adding the -x c option.
878 -- Also useful for plain .c files, just in case GHC saw a
880 [ SysTools.Option "-x", SysTools.Option "c"] ++
881 [ SysTools.FileOption "" input_fn
882 , SysTools.Option "-o"
883 , SysTools.FileOption "" output_fn
885 ++ map SysTools.Option (
894 ++ [ verb, "-S", "-Wimplicit", "-O" ]
895 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
902 return (next_phase, dflags, maybe_loc, output_fn)
904 -- ToDo: postprocess the output from gcc
906 -----------------------------------------------------------------------------
909 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
910 = do let mangler_opts = getOpts dflags opt_m
913 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
915 machdep_opts <- return []
918 let split = dopt Opt_SplitObjs dflags
920 | split = SplitMangle
922 output_fn <- get_output_fn next_phase maybe_loc
924 SysTools.runMangle dflags (map SysTools.Option mangler_opts
925 ++ [ SysTools.FileOption "" input_fn
926 , SysTools.FileOption "" output_fn
928 ++ map SysTools.Option machdep_opts)
930 return (next_phase, dflags, maybe_loc, output_fn)
932 -----------------------------------------------------------------------------
935 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
936 = do -- tmp_pfx is the prefix used for the split .s files
937 -- We also use it as the file to contain the no. of split .s files (sigh)
938 split_s_prefix <- SysTools.newTempName dflags "split"
939 let n_files_fn = split_s_prefix
941 SysTools.runSplit dflags
942 [ SysTools.FileOption "" input_fn
943 , SysTools.FileOption "" split_s_prefix
944 , SysTools.FileOption "" n_files_fn
947 -- Save the number of split files for future references
948 s <- readFile n_files_fn
949 let n_files = read s :: Int
950 writeIORef v_Split_info (split_s_prefix, n_files)
952 -- Remember to delete all these files
953 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
956 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
957 -- we don't use the filename
959 -----------------------------------------------------------------------------
962 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
963 = do let as_opts = getOpts dflags opt_a
964 let cmdline_include_paths = includePaths dflags
966 output_fn <- get_output_fn StopLn maybe_loc
968 -- we create directories for the object file, because it
969 -- might be a hierarchical module.
970 createDirectoryHierarchy (directoryOf output_fn)
972 SysTools.runAs dflags
973 (map SysTools.Option as_opts
974 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
975 ++ [ SysTools.Option "-c"
976 , SysTools.FileOption "" input_fn
977 , SysTools.Option "-o"
978 , SysTools.FileOption "" output_fn
981 return (StopLn, dflags, maybe_loc, output_fn)
984 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
985 = do let as_opts = getOpts dflags opt_a
987 (split_s_prefix, n) <- readIORef v_Split_info
990 | Just d <- objectDir dflags = d
991 | otherwise = basename ++ "_split"
994 = do let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
995 let output_o = replaceFilenameDirectory
996 (basename ++ "__" ++ show n ++ ".o")
998 let osuf = objectSuf dflags
999 let real_o = replaceFilenameSuffix output_o osuf
1000 SysTools.runAs dflags
1001 (map SysTools.Option as_opts ++
1002 [ SysTools.Option "-c"
1003 , SysTools.Option "-o"
1004 , SysTools.FileOption "" real_o
1005 , SysTools.FileOption "" input_s
1008 mapM_ assemble_file [1..n]
1010 output_fn <- get_output_fn StopLn maybe_loc
1011 return (StopLn, dflags, maybe_loc, output_fn)
1013 -----------------------------------------------------------------------------
1014 -- MoveBinary sort-of-phase
1015 -- After having produced a binary, move it somewhere else and generate a
1016 -- wrapper script calling the binary. Currently, we need this only in
1017 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
1018 -- central directory.
1019 -- This is called from staticLink below, after linking. I haven't made it
1020 -- a separate phase to minimise interfering with other modules, and
1021 -- we don't need the generality of a phase (MoveBinary is always
1022 -- done after linking and makes only sense in a parallel setup) -- HWL
1024 runPhase_MoveBinary input_fn
1027 pvm_root <- getEnv "PVM_ROOT"
1028 pvm_arch <- getEnv "PVM_ARCH"
1030 pvm_executable_base = "=" ++ input_fn
1031 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
1032 -- nuke old binary; maybe use configur'ed names for cp and rm?
1033 system ("rm -f " ++ pvm_executable)
1034 -- move the newly created binary into PVM land
1035 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
1036 -- generate a wrapper script for running a parallel prg under PVM
1037 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
1040 -- generates a Perl skript starting a parallel prg under PVM
1041 mk_pvm_wrapper_script :: String -> String -> String -> String
1042 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
1044 "eval 'exec perl -S $0 ${1+\"$@\"}'",
1045 " if $running_under_some_shell;",
1046 "# =!=!=!=!=!=!=!=!=!=!=!",
1047 "# This script is automatically generated: DO NOT EDIT!!!",
1048 "# Generated by Glasgow Haskell Compiler",
1049 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
1051 "$pvm_executable = '" ++ pvm_executable ++ "';",
1052 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
1053 "$SysMan = '" ++ sysMan ++ "';",
1055 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
1056 "# first, some magical shortcuts to run "commands" on the binary",
1057 "# (which is hidden)",
1058 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1059 " local($cmd) = $1;",
1060 " system("$cmd $pvm_executable");",
1061 " exit(0); # all done",
1064 "# Now, run the real binary; process the args first",
1065 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1067 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1068 "@nonPVM_args = ();",
1069 "$in_RTS_args = 0;",
1071 "args: while ($a = shift(@ARGV)) {",
1072 " if ( $a eq '+RTS' ) {",
1073 " $in_RTS_args = 1;",
1074 " } elsif ( $a eq '-RTS' ) {",
1075 " $in_RTS_args = 0;",
1077 " if ( $a eq '-d' && $in_RTS_args ) {",
1079 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1080 " $nprocessors = $1;",
1081 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1082 " $nprocessors = $1;",
1084 " push(@nonPVM_args, $a);",
1088 "local($return_val) = 0;",
1089 "# Start the parallel execution by calling SysMan",
1090 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1091 "$return_val = $?;",
1092 "# ToDo: fix race condition moving files and flushing them!!",
1093 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1094 "exit($return_val);"
1097 -----------------------------------------------------------------------------
1098 -- Complain about non-dynamic flags in OPTIONS pragmas
1100 checkProcessArgsResult flags filename
1101 = do when (notNull flags) (throwDyn (ProgramError (
1102 showSDoc (hang (text filename <> char ':')
1103 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1104 hsep (map text flags)))
1107 -----------------------------------------------------------------------------
1108 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1110 getHCFilePackages :: FilePath -> IO [PackageId]
1111 getHCFilePackages filename =
1112 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1115 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1116 return (map stringToPackageId (words rest))
1120 -----------------------------------------------------------------------------
1121 -- Static linking, of .o files
1123 -- The list of packages passed to link is the list of packages on
1124 -- which this program depends, as discovered by the compilation
1125 -- manager. It is combined with the list of packages that the user
1126 -- specifies on the command line with -package flags.
1128 -- In one-shot linking mode, we can't discover the package
1129 -- dependencies (because we haven't actually done any compilation or
1130 -- read any interface files), so the user must explicitly specify all
1133 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1134 staticLink dflags o_files dep_packages = do
1135 let verb = getVerbFlag dflags
1136 output_fn = exeFileName dflags
1138 -- get the full list of packages to link with, by combining the
1139 -- explicit packages with the auto packages and all of their
1140 -- dependencies, and eliminating duplicates.
1142 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1143 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1145 let lib_paths = libraryPaths dflags
1146 let lib_path_opts = map ("-L"++) lib_paths
1148 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1150 #ifdef darwin_TARGET_OS
1151 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1152 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1154 let framework_paths = frameworkPaths dflags
1155 framework_path_opts = map ("-F"++) framework_paths
1157 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1158 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1160 let frameworks = cmdlineFrameworks dflags
1161 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1162 -- reverse because they're added in reverse order from the cmd line
1165 -- probably _stub.o files
1166 extra_ld_inputs <- readIORef v_Ld_inputs
1168 -- opts from -optl-<blah> (including -l<blah> options)
1169 let extra_ld_opts = getOpts dflags opt_l
1171 let ways = wayNames dflags
1173 -- Here are some libs that need to be linked at the *end* of
1174 -- the command line, because they contain symbols that are referred to
1175 -- by the RTS. We can't therefore use the ordinary way opts for these.
1177 debug_opts | WayDebug `elem` ways = [
1178 #if defined(HAVE_LIBBFD)
1185 thread_opts | WayThreaded `elem` ways = [
1186 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1189 #if defined(osf3_TARGET_OS)
1195 let (md_c_flags, _) = machdepCCOpts dflags
1196 SysTools.runLink dflags (
1197 [ SysTools.Option verb
1198 , SysTools.Option "-o"
1199 , SysTools.FileOption "" output_fn
1201 ++ map SysTools.Option (
1207 #ifdef darwin_TARGET_OS
1208 ++ framework_path_opts
1211 ++ pkg_lib_path_opts
1213 #ifdef darwin_TARGET_OS
1214 ++ pkg_framework_path_opts
1215 ++ pkg_framework_opts
1221 -- parallel only: move binary to another dir -- HWL
1222 when (WayPar `elem` ways)
1223 (do success <- runPhase_MoveBinary output_fn
1224 if success then return ()
1225 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1228 exeFileName :: DynFlags -> FilePath
1230 | Just s <- outputFile dflags =
1231 #if defined(mingw32_HOST_OS)
1232 if null (suffixOf s)
1233 then s `joinFileExt` "exe"
1239 #if defined(mingw32_HOST_OS)
1245 -----------------------------------------------------------------------------
1246 -- Making a DLL (only for Win32)
1248 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1249 doMkDLL dflags o_files dep_packages = do
1250 let verb = getVerbFlag dflags
1251 let static = opt_Static
1252 let no_hs_main = dopt Opt_NoHsMain dflags
1253 let o_file = outputFile dflags
1254 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1256 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1257 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1259 let lib_paths = libraryPaths dflags
1260 let lib_path_opts = map ("-L"++) lib_paths
1262 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1264 -- probably _stub.o files
1265 extra_ld_inputs <- readIORef v_Ld_inputs
1267 -- opts from -optdll-<blah>
1268 let extra_ld_opts = getOpts dflags opt_dll
1270 let pstate = pkgState dflags
1271 rts_id | ExtPackage id <- rtsPackageId pstate = id
1272 | otherwise = panic "staticLink: rts package missing"
1273 base_id | ExtPackage id <- basePackageId pstate = id
1274 | otherwise = panic "staticLink: base package missing"
1275 rts_pkg = getPackageDetails pstate rts_id
1276 base_pkg = getPackageDetails pstate base_id
1278 let extra_os = if static || no_hs_main
1280 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1281 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1283 let (md_c_flags, _) = machdepCCOpts dflags
1284 SysTools.runMkDLL dflags
1285 ([ SysTools.Option verb
1286 , SysTools.Option "-o"
1287 , SysTools.FileOption "" output_fn
1289 ++ map SysTools.Option (
1293 ++ [ "--target=i386-mingw32" ]
1297 ++ pkg_lib_path_opts
1299 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1301 else [ "--export-all" ])
1304 -- -----------------------------------------------------------------------------
1307 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1308 doCpp dflags raw include_cc_opts input_fn output_fn = do
1309 let hscpp_opts = getOpts dflags opt_P
1310 let cmdline_include_paths = includePaths dflags
1312 pkg_include_dirs <- getPackageIncludePath dflags []
1313 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1314 (cmdline_include_paths ++ pkg_include_dirs)
1316 let verb = getVerbFlag dflags
1319 | not include_cc_opts = []
1320 | otherwise = (optc ++ md_c_flags)
1322 optc = getOpts dflags opt_c
1323 (md_c_flags, _) = machdepCCOpts dflags
1325 let cpp_prog args | raw = SysTools.runCpp dflags args
1326 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1329 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1330 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1331 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1332 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1333 -- remember, in code we *compile*, the HOST is the same our TARGET,
1334 -- and BUILD is the same as our HOST.
1336 cpp_prog ([SysTools.Option verb]
1337 ++ map SysTools.Option include_paths
1338 ++ map SysTools.Option hsSourceCppOpts
1339 ++ map SysTools.Option hscpp_opts
1340 ++ map SysTools.Option cc_opts
1341 ++ map SysTools.Option target_defs
1342 ++ [ SysTools.Option "-x"
1343 , SysTools.Option "c"
1344 , SysTools.Option input_fn
1345 -- We hackily use Option instead of FileOption here, so that the file
1346 -- name is not back-slashed on Windows. cpp is capable of
1347 -- dealing with / in filenames, so it works fine. Furthermore
1348 -- if we put in backslashes, cpp outputs #line directives
1349 -- with *double* backslashes. And that in turn means that
1350 -- our error messages get double backslashes in them.
1351 -- In due course we should arrange that the lexer deals
1352 -- with these \\ escapes properly.
1353 , SysTools.Option "-o"
1354 , SysTools.FileOption "" output_fn
1357 cHaskell1Version = "5" -- i.e., Haskell 98
1359 -- Default CPP defines in Haskell source
1361 [ "-D__HASKELL1__="++cHaskell1Version
1362 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1364 , "-D__CONCURRENT_HASKELL__"
1367 -----------------------------------------------------------------------------
1368 -- Reading OPTIONS pragmas
1370 -- This is really very ugly and should be rewritten.
1371 -- - some error messages are thrown as exceptions (should return)
1372 -- - we ignore LINE pragmas
1373 -- - parsing is horrible, combination of prefixMatch and 'read'.
1375 getOptionsFromSource
1376 :: String -- input file
1377 -> IO [String] -- options, if any
1378 getOptionsFromSource file
1379 = do h <- openFile file ReadMode
1380 look h 1 `finally` hClose h
1383 r <- tryJust ioErrors (hGetLine h)
1385 Left e | isEOFError e -> return []
1386 | otherwise -> ioError e
1388 let l = removeSpaces l'
1390 () | null l -> look h (i+1)
1391 | prefixMatch "#" l -> look h (i+1)
1392 | prefixMatch "{-# LINE" l -> look h (i+1) -- -} wrong!
1393 | Just opts <- matchOptions i file l
1394 -> do rest <- look h (i+1)
1395 return (opts ++ rest)
1396 | otherwise -> return []
1398 getOptionsFromStringBuffer :: StringBuffer -> FilePath -> [(Int,String)]
1399 getOptionsFromStringBuffer buffer@(StringBuffer _ len _) fn =
1401 ls = lines (lexemeToString buffer len) -- lazy, so it's ok
1407 let l = removeSpaces l'
1409 () | null l -> look (i+1) ls
1410 | prefixMatch "#" l -> look (i+1) ls
1411 | prefixMatch "{-# LINE" l -> look (i+1) ls -- -} wrong!
1412 | Just opts <- matchOptions i fn l
1413 -> zip (repeat i) opts ++ look (i+1) ls
1416 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1417 -- instead of OPTIONS_GHC, but that is deprecated.
1419 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1420 = matchOptions1 i fn (removeSpaces s1)
1424 matchOptions1 i fn s
1425 | Just s2 <- maybePrefixMatch "OPTIONS" s
1427 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1428 -> matchOptions2 i fn s3
1429 | not (is_ident (head s2))
1430 -> matchOptions2 i fn s2
1432 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1433 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1434 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1435 = Just ["-#include", removeSpaces (reverse s3)]
1437 | Just s2 <- maybePrefixMatch "LANGUAGE" s, not (is_ident (head s2)),
1438 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1439 = case [ exts | (exts,"") <- reads ('[' : reverse (']':s3))] of
1440 [] -> languagePragParseError i fn
1441 exts:_ -> case extensionsToGHCFlag exts of
1442 ([], opts) -> Just opts
1443 (unsup,_) -> unsupportedExtnError i fn unsup
1444 | otherwise = Nothing
1445 matchOptions2 i fn s
1446 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1447 | otherwise = Nothing
1450 languagePragParseError i fn =
1451 pgmError (showSDoc (mkLocMessage loc (
1452 text "cannot parse LANGUAGE pragma")))
1453 where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0)
1455 unsupportedExtnError i fn unsup =
1456 pgmError (showSDoc (mkLocMessage loc (
1457 text "unsupported extensions: " <>
1458 hcat (punctuate comma (map (text.show) unsup)))))
1459 where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0)
1462 optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages
1463 optionsErrorMsgs unhandled_flags flags_lines filename
1464 = (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
1466 unhandled_flags_lines = [ (l,f) | f <- unhandled_flags,
1467 (l,f') <- flags_lines, f == f' ]
1469 ErrUtils.mkPlainErrMsg (srcLocSpan loc) $
1470 text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag
1472 loc = mkSrcLoc (mkFastString filename) line 0
1473 -- ToDo: we need a better SrcSpan here
1475 -- -----------------------------------------------------------------------------
1478 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1479 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1480 hscNextPhase dflags other hsc_lang =
1483 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1485 HscNothing -> StopLn
1486 HscInterpreted -> StopLn
1490 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1491 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1492 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1493 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1496 keep_hc = dopt Opt_KeepHcFiles dflags
1498 -- don't change the lang if we're interpreting
1499 | current_hsc_lang == HscInterpreted = current_hsc_lang
1501 -- force -fvia-C if we are being asked for a .hc file
1502 | HCc <- stop = HscC
1504 -- otherwise, stick to the plan
1505 | otherwise = current_hsc_lang
1507 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1508 -- The split prefix and number of files