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 ..." $$ vcat (map ppr linkables))
304 -- check for the -no-link flag
305 if isNoLink (ghcLink dflags)
306 then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).")
310 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
311 obj_files = concatMap getOfiles linkables
313 exe_file = exeFileName dflags
315 -- if the modification time on the executable is later than the
316 -- modification times on all of the objects, then omit linking
317 -- (unless the -no-recomp flag was given).
318 e_exe_time <- IO.try $ getModificationTime exe_file
320 | Left _ <- e_exe_time = True
321 | Right t <- e_exe_time =
322 any (t <) (map linkableTime linkables)
324 if dopt Opt_RecompChecking dflags && not linking_needed
325 then do debugTraceMsg dflags 1 (text exe_file <+> ptext SLIT("is up to date, linking not required."))
329 debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file
332 -- Don't showPass in Batch mode; doLink will do that for us.
333 staticLink dflags obj_files pkg_deps
335 debugTraceMsg dflags 3 (text "link: done")
337 -- staticLink only returns if it succeeds
341 = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$
342 text " Main.main not exported; not linking.")
346 -- -----------------------------------------------------------------------------
347 -- Compile files in one-shot mode.
349 oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO ()
350 oneShot dflags stop_phase srcs = do
351 o_files <- mapM (compileFile dflags stop_phase) srcs
352 doLink dflags stop_phase o_files
354 compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath
355 compileFile dflags stop_phase (src, mb_phase) = do
356 exists <- doesFileExist src
358 throwDyn (CmdLineError ("does not exist: " ++ src))
361 split = dopt Opt_SplitObjs dflags
362 mb_o_file = outputFile dflags
363 ghc_link = ghcLink dflags -- Set by -c or -no-link
365 -- When linking, the -o argument refers to the linker's output.
366 -- otherwise, we use it as the name for the pipeline's output.
368 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
369 -- -o foo applies to linker
370 | Just o_file <- mb_o_file = SpecificFile o_file
371 -- -o foo applies to the file we are compiling now
372 | otherwise = Persistent
374 stop_phase' = case stop_phase of
375 As | split -> SplitAs
378 (_, out_file) <- runPipeline stop_phase' dflags
379 (src, mb_phase) output Nothing{-no ModLocation-}
383 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
384 doLink dflags stop_phase o_files
385 | not (isStopLn stop_phase)
386 = return () -- We stopped before the linking phase
389 = case ghcLink dflags of
391 StaticLink -> staticLink dflags o_files link_pkgs
392 MkDLL -> doMkDLL dflags o_files link_pkgs
394 -- Always link in the haskell98 package for static linking. Other
395 -- packages have to be specified via the -package flag.
397 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
401 -- ---------------------------------------------------------------------------
402 -- Run a compilation pipeline, consisting of multiple phases.
404 -- This is the interface to the compilation pipeline, which runs
405 -- a series of compilation steps on a single source file, specifying
406 -- at which stage to stop.
408 -- The DynFlags can be modified by phases in the pipeline (eg. by
409 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
414 -- output should be to a temporary file: we're going to
415 -- run more compilation steps on this output later
417 -- we want a persistent file, i.e. a file in the current directory
418 -- derived from the input filename, but with the appropriate extension.
419 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
420 | SpecificFile FilePath
421 -- the output must go into the specified file.
424 :: Phase -- When to stop
425 -> DynFlags -- Dynamic flags
426 -> (FilePath,Maybe Phase) -- Input filename (and maybe -x suffix)
427 -> PipelineOutput -- Output filename
428 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
429 -> IO (DynFlags, FilePath) -- (final flags, output filename)
431 runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc
433 let (basename, suffix) = splitFilename input_fn
435 -- If we were given a -x flag, then use that phase to start from
437 | Just x_phase <- mb_phase = x_phase
438 | otherwise = startPhase suffix
440 -- We want to catch cases of "you can't get there from here" before
441 -- we start the pipeline, because otherwise it will just run off the
444 -- There is a partial ordering on phases, where A < B iff A occurs
445 -- before B in a normal compilation pipeline.
447 when (not (start_phase `happensBefore` stop_phase)) $
449 ("cannot compile this file to desired target: "
452 -- this is a function which will be used to calculate output file names
453 -- as we go along (we partially apply it to some of its inputs here)
454 let get_output_fn = getOutputFilename dflags stop_phase output basename
456 -- Execute the pipeline...
457 (dflags', output_fn, maybe_loc) <-
458 pipeLoop dflags start_phase stop_phase input_fn
459 basename suffix get_output_fn maybe_loc
461 -- Sometimes, a compilation phase doesn't actually generate any output
462 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
463 -- stage, but we wanted to keep the output, then we have to explicitly
467 return (dflags', output_fn)
469 do final_fn <- get_output_fn stop_phase maybe_loc
470 when (final_fn /= output_fn) $
471 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
472 ++ "'") output_fn final_fn
473 return (dflags', final_fn)
477 pipeLoop :: DynFlags -> Phase -> Phase
478 -> FilePath -> String -> Suffix
479 -> (Phase -> Maybe ModLocation -> IO FilePath)
481 -> IO (DynFlags, FilePath, Maybe ModLocation)
483 pipeLoop dflags phase stop_phase
484 input_fn orig_basename orig_suff
485 orig_get_output_fn maybe_loc
487 | phase `eqPhase` stop_phase -- All done
488 = return (dflags, input_fn, maybe_loc)
490 | not (phase `happensBefore` stop_phase)
491 -- Something has gone wrong. We'll try to cover all the cases when
492 -- this could happen, so if we reach here it is a panic.
493 -- eg. it might happen if the -C flag is used on a source file that
494 -- has {-# OPTIONS -fasm #-}.
495 = panic ("pipeLoop: at phase " ++ show phase ++
496 " but I wanted to stop at phase " ++ show stop_phase)
499 = do { (next_phase, dflags', maybe_loc, output_fn)
500 <- runPhase phase stop_phase dflags orig_basename
501 orig_suff input_fn orig_get_output_fn maybe_loc
502 ; pipeLoop dflags' next_phase stop_phase output_fn
503 orig_basename orig_suff orig_get_output_fn maybe_loc }
506 :: DynFlags -> Phase -> PipelineOutput -> String
507 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
508 getOutputFilename dflags stop_phase output basename
512 odir = objectDir dflags
513 osuf = objectSuf dflags
514 keep_hc = dopt Opt_KeepHcFiles dflags
515 keep_raw_s = dopt Opt_KeepRawSFiles dflags
516 keep_s = dopt Opt_KeepSFiles dflags
518 myPhaseInputExt HCc = hcsuf
519 myPhaseInputExt StopLn = osuf
520 myPhaseInputExt other = phaseInputExt other
522 func next_phase maybe_location
523 | is_last_phase, Persistent <- output = persistent_fn
524 | is_last_phase, SpecificFile f <- output = return f
525 | keep_this_output = persistent_fn
526 | otherwise = newTempName dflags suffix
528 is_last_phase = next_phase `eqPhase` stop_phase
530 -- sometimes, we keep output from intermediate stages
534 Mangle | keep_raw_s -> True
536 HCc | keep_hc -> True
539 suffix = myPhaseInputExt next_phase
541 -- persistent object files get put in odir
543 | StopLn <- next_phase = return odir_persistent
544 | otherwise = return persistent
546 persistent = basename `joinFileExt` suffix
549 | Just loc <- maybe_location = ml_obj_file loc
550 | Just d <- odir = d `joinFileName` persistent
551 | otherwise = persistent
554 -- -----------------------------------------------------------------------------
555 -- Each phase in the pipeline returns the next phase to execute, and the
556 -- name of the file in which the output was placed.
558 -- We must do things dynamically this way, because we often don't know
559 -- what the rest of the phases will be until part-way through the
560 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
561 -- of a source file can change the latter stages of the pipeline from
562 -- taking the via-C route to using the native code generator.
564 runPhase :: Phase -- Do this phase first
565 -> Phase -- Stop just before this phase
567 -> String -- basename of original input source
568 -> String -- its extension
569 -> FilePath -- name of file which contains the input to this phase.
570 -> (Phase -> Maybe ModLocation -> IO FilePath)
571 -- how to calculate the output filename
572 -> Maybe ModLocation -- the ModLocation, if we have one
573 -> IO (Phase, -- next phase
574 DynFlags, -- new dynamic flags
575 Maybe ModLocation, -- the ModLocation, if we have one
576 FilePath) -- output filename
578 -- Invariant: the output filename always contains the output
579 -- Interesting case: Hsc when there is no recompilation to do
580 -- Then the output filename is still a .o file
582 -------------------------------------------------------------------------------
585 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
586 = do let unlit_flags = getOpts dflags opt_L
587 -- The -h option passes the file name for unlit to put in a #line directive
588 output_fn <- get_output_fn (Cpp sf) maybe_loc
590 SysTools.runUnlit dflags
591 (map SysTools.Option unlit_flags ++
592 [ SysTools.Option "-h"
593 , SysTools.Option input_fn
594 , SysTools.FileOption "" input_fn
595 , SysTools.FileOption "" output_fn
598 return (Cpp sf, dflags, maybe_loc, output_fn)
600 -------------------------------------------------------------------------------
601 -- Cpp phase : (a) gets OPTIONS out of file
602 -- (b) runs cpp if necessary
604 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
605 = do src_opts <- getOptionsFromSource input_fn
606 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
607 checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff)
609 if not (dopt Opt_Cpp dflags) then
610 -- no need to preprocess CPP, just pass input file along
611 -- to the next phase of the pipeline.
612 return (HsPp sf, dflags, maybe_loc, input_fn)
614 output_fn <- get_output_fn (HsPp sf) maybe_loc
615 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
616 return (HsPp sf, dflags, maybe_loc, output_fn)
618 -------------------------------------------------------------------------------
621 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
622 = do if not (dopt Opt_Pp dflags) then
623 -- no need to preprocess, just pass input file along
624 -- to the next phase of the pipeline.
625 return (Hsc sf, dflags, maybe_loc, input_fn)
627 let hspp_opts = getOpts dflags opt_F
628 let orig_fn = basename `joinFileExt` suff
629 output_fn <- get_output_fn (Hsc sf) maybe_loc
630 SysTools.runPp dflags
631 ( [ SysTools.Option orig_fn
632 , SysTools.Option input_fn
633 , SysTools.FileOption "" output_fn
635 map SysTools.Option hspp_opts
637 return (Hsc sf, dflags, maybe_loc, output_fn)
639 -----------------------------------------------------------------------------
642 -- Compilation of a single module, in "legacy" mode (_not_ under
643 -- the direction of the compilation manager).
644 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
645 = do -- normal Hsc mode, not mkdependHS
647 -- we add the current directory (i.e. the directory in which
648 -- the .hs files resides) to the import path, since this is
649 -- what gcc does, and it's probably what you want.
650 let current_dir = directoryOf basename
652 paths = includePaths dflags0
653 dflags = dflags0 { includePaths = current_dir : paths }
655 -- gather the imports and module name
656 (hspp_buf,mod_name) <-
658 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
659 ; m <- getCoreModuleName input_fn
660 ; return (Nothing, mkModule m) }
662 other -> do { buf <- hGetStringBuffer input_fn
663 ; (_,_,L _ mod_name) <- getImports dflags buf input_fn
664 ; return (Just buf, mod_name) }
666 -- Build a ModLocation to pass to hscMain.
667 -- The source filename is rather irrelevant by now, but it's used
668 -- by hscMain for messages. hscMain also needs
669 -- the .hi and .o filenames, and this is as good a way
670 -- as any to generate them, and better than most. (e.g. takes
671 -- into accout the -osuf flags)
672 location1 <- mkHomeModLocation2 dflags mod_name basename suff
674 -- Boot-ify it if necessary
675 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
676 | otherwise = location1
679 -- Take -ohi into account if present
680 -- This can't be done in mkHomeModuleLocation because
681 -- it only applies to the module being compiles
682 let ohi = outputHi dflags
683 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
684 | otherwise = location2
686 -- Take -o into account if present
687 -- Very like -ohi, but we must *only* do this if we aren't linking
688 -- (If we're linking then the -o applies to the linked thing, not to
689 -- the object file for one module.)
690 -- Note the nasty duplication with the same computation in compileFile above
691 let expl_o_file = outputFile dflags
692 location4 | Just ofile <- expl_o_file
693 , isNoLink (ghcLink dflags)
694 = location3 { ml_obj_file = ofile }
695 | otherwise = location3
697 -- Make the ModSummary to hand to hscMain
698 src_timestamp <- getModificationTime (basename `joinFileExt` suff)
700 unused_field = panic "runPhase:ModSummary field"
701 -- Some fields are not looked at by hscMain
702 mod_summary = ModSummary { ms_mod = mod_name,
703 ms_hsc_src = src_flavour,
704 ms_hspp_file = Just input_fn,
705 ms_hspp_buf = hspp_buf,
706 ms_location = location4,
707 ms_hs_date = src_timestamp,
708 ms_obj_date = Nothing,
709 ms_imps = unused_field,
710 ms_srcimps = unused_field }
712 o_file = ml_obj_file location4 -- The real object file
715 -- Figure out if the source has changed, for recompilation avoidance.
717 -- Setting source_unchanged to True means that M.o seems
718 -- to be up to date wrt M.hs; so no need to recompile unless imports have
719 -- changed (which the compiler itself figures out).
720 -- Setting source_unchanged to False tells the compiler that M.o is out of
721 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
722 let do_recomp = dopt Opt_RecompChecking dflags
724 if not do_recomp || not (isStopLn stop)
725 -- Set source_unchanged to False unconditionally if
726 -- (a) recompilation checker is off, or
727 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
729 -- Otherwise look at file modification dates
730 else do o_file_exists <- doesFileExist o_file
732 then return False -- Need to recompile
733 else do t2 <- getModificationTime o_file
734 if t2 > src_timestamp
739 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
740 let next_phase = hscNextPhase dflags src_flavour hsc_lang
741 output_fn <- get_output_fn next_phase (Just location4)
743 let dflags' = dflags { hscTarget = hsc_lang,
744 hscOutName = output_fn,
745 extCoreName = basename ++ ".hcr" }
747 hsc_env <- newHscEnv dflags'
749 -- Tell the finder cache about this module
750 addHomeModuleToFinder hsc_env mod_name location4
753 result <- hscMain hsc_env
754 mod_summary source_unchanged
755 False -- No object file
757 Nothing -- No "module i of n" progress info
761 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
763 HscNoRecomp details iface -> do
764 SysTools.touch dflags' "Touching object file" o_file
765 -- The .o file must have a later modification date
766 -- than the source file (else we wouldn't be in HscNoRecomp)
767 -- but we touch it anyway, to keep 'make' happy (we think).
768 return (StopLn, dflags', Just location4, o_file)
770 HscRecomp _details _iface
771 stub_h_exists stub_c_exists
772 _maybe_interpreted_code -> do
774 when stub_c_exists $ do
775 stub_o <- compileStub dflags' mod_name location4
776 consIORef v_Ld_inputs stub_o
778 -- In the case of hs-boot files, generate a dummy .o-boot
779 -- stamp file for the benefit of Make
781 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
784 return (next_phase, dflags', Just location4, output_fn)
786 -----------------------------------------------------------------------------
789 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
791 output_fn <- get_output_fn Cmm maybe_loc
792 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
793 return (Cmm, dflags, maybe_loc, output_fn)
795 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
797 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
798 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
799 output_fn <- get_output_fn next_phase maybe_loc
801 let dflags' = dflags { hscTarget = hsc_lang,
802 hscOutName = output_fn,
803 extCoreName = basename ++ ".hcr" }
805 ok <- hscCmmFile dflags' input_fn
807 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
809 return (next_phase, dflags, maybe_loc, output_fn)
811 -----------------------------------------------------------------------------
814 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
815 -- way too many hacks, and I can't say I've ever used it anyway.
817 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
818 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
819 = do let cc_opts = getOpts dflags opt_c
820 hcc = cc_phase `eqPhase` HCc
822 let cmdline_include_paths = includePaths dflags
824 -- HC files have the dependent packages stamped into them
825 pkgs <- if hcc then getHCFilePackages input_fn else return []
827 -- add package include paths even if we're just compiling .c
828 -- files; this is the Value Add(TM) that using ghc instead of
830 pkg_include_dirs <- getPackageIncludePath dflags pkgs
831 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
832 (cmdline_include_paths ++ pkg_include_dirs)
834 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
835 let pic_c_flags = picCCOpts dflags
837 let verb = getVerbFlag dflags
839 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
841 let split_objs = dopt Opt_SplitObjs dflags
842 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
845 let excessPrecision = dopt Opt_ExcessPrecision dflags
849 let mangle = dopt Opt_DoAsmMangling dflags
851 | hcc && mangle = Mangle
853 output_fn <- get_output_fn next_phase maybe_loc
855 SysTools.runCc dflags (
856 -- force the C compiler to interpret this file as C when
857 -- compiling .hc files, by adding the -x c option.
858 -- Also useful for plain .c files, just in case GHC saw a
860 [ SysTools.Option "-x", SysTools.Option "c"] ++
861 [ SysTools.FileOption "" input_fn
862 , SysTools.Option "-o"
863 , SysTools.FileOption "" output_fn
865 ++ map SysTools.Option (
871 ++ [ verb, "-S", "-Wimplicit", "-O" ]
872 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
875 ++ (if excessPrecision then [] else [ "-ffloat-store" ])
880 return (next_phase, dflags, maybe_loc, output_fn)
882 -- ToDo: postprocess the output from gcc
884 -----------------------------------------------------------------------------
887 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
888 = do let mangler_opts = getOpts dflags opt_m
891 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
893 machdep_opts <- return []
896 let split = dopt Opt_SplitObjs dflags
898 | split = SplitMangle
900 output_fn <- get_output_fn next_phase maybe_loc
902 SysTools.runMangle dflags (map SysTools.Option mangler_opts
903 ++ [ SysTools.FileOption "" input_fn
904 , SysTools.FileOption "" output_fn
906 ++ map SysTools.Option machdep_opts)
908 return (next_phase, dflags, maybe_loc, output_fn)
910 -----------------------------------------------------------------------------
913 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
914 = do -- tmp_pfx is the prefix used for the split .s files
915 -- We also use it as the file to contain the no. of split .s files (sigh)
916 split_s_prefix <- SysTools.newTempName dflags "split"
917 let n_files_fn = split_s_prefix
919 SysTools.runSplit dflags
920 [ SysTools.FileOption "" input_fn
921 , SysTools.FileOption "" split_s_prefix
922 , SysTools.FileOption "" n_files_fn
925 -- Save the number of split files for future references
926 s <- readFile n_files_fn
927 let n_files = read s :: Int
928 writeIORef v_Split_info (split_s_prefix, n_files)
930 -- Remember to delete all these files
931 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
934 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
935 -- we don't use the filename
937 -----------------------------------------------------------------------------
940 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
941 = do let as_opts = getOpts dflags opt_a
942 let cmdline_include_paths = includePaths dflags
944 output_fn <- get_output_fn StopLn maybe_loc
946 -- we create directories for the object file, because it
947 -- might be a hierarchical module.
948 createDirectoryHierarchy (directoryOf output_fn)
950 SysTools.runAs dflags
951 (map SysTools.Option as_opts
952 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
953 ++ [ SysTools.Option "-c"
954 , SysTools.FileOption "" input_fn
955 , SysTools.Option "-o"
956 , SysTools.FileOption "" output_fn
959 return (StopLn, dflags, maybe_loc, output_fn)
962 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
963 = do let as_opts = getOpts dflags opt_a
965 (split_s_prefix, n) <- readIORef v_Split_info
968 | Just d <- objectDir dflags = d
969 | otherwise = basename ++ "_split"
972 = do let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
973 let output_o = replaceFilenameDirectory
974 (basename ++ "__" ++ show n ++ ".o")
976 let osuf = objectSuf dflags
977 let real_o = replaceFilenameSuffix output_o osuf
978 SysTools.runAs dflags
979 (map SysTools.Option as_opts ++
980 [ SysTools.Option "-c"
981 , SysTools.Option "-o"
982 , SysTools.FileOption "" real_o
983 , SysTools.FileOption "" input_s
986 mapM_ assemble_file [1..n]
988 output_fn <- get_output_fn StopLn maybe_loc
989 return (StopLn, dflags, maybe_loc, output_fn)
991 -----------------------------------------------------------------------------
992 -- MoveBinary sort-of-phase
993 -- After having produced a binary, move it somewhere else and generate a
994 -- wrapper script calling the binary. Currently, we need this only in
995 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
996 -- central directory.
997 -- This is called from staticLink below, after linking. I haven't made it
998 -- a separate phase to minimise interfering with other modules, and
999 -- we don't need the generality of a phase (MoveBinary is always
1000 -- done after linking and makes only sense in a parallel setup) -- HWL
1002 runPhase_MoveBinary input_fn
1005 pvm_root <- getEnv "PVM_ROOT"
1006 pvm_arch <- getEnv "PVM_ARCH"
1008 pvm_executable_base = "=" ++ input_fn
1009 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
1010 -- nuke old binary; maybe use configur'ed names for cp and rm?
1011 system ("rm -f " ++ pvm_executable)
1012 -- move the newly created binary into PVM land
1013 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
1014 -- generate a wrapper script for running a parallel prg under PVM
1015 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
1018 -- generates a Perl skript starting a parallel prg under PVM
1019 mk_pvm_wrapper_script :: String -> String -> String -> String
1020 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
1022 "eval 'exec perl -S $0 ${1+\"$@\"}'",
1023 " if $running_under_some_shell;",
1024 "# =!=!=!=!=!=!=!=!=!=!=!",
1025 "# This script is automatically generated: DO NOT EDIT!!!",
1026 "# Generated by Glasgow Haskell Compiler",
1027 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
1029 "$pvm_executable = '" ++ pvm_executable ++ "';",
1030 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
1031 "$SysMan = '" ++ sysMan ++ "';",
1033 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
1034 "# first, some magical shortcuts to run "commands" on the binary",
1035 "# (which is hidden)",
1036 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1037 " local($cmd) = $1;",
1038 " system("$cmd $pvm_executable");",
1039 " exit(0); # all done",
1042 "# Now, run the real binary; process the args first",
1043 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1045 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1046 "@nonPVM_args = ();",
1047 "$in_RTS_args = 0;",
1049 "args: while ($a = shift(@ARGV)) {",
1050 " if ( $a eq '+RTS' ) {",
1051 " $in_RTS_args = 1;",
1052 " } elsif ( $a eq '-RTS' ) {",
1053 " $in_RTS_args = 0;",
1055 " if ( $a eq '-d' && $in_RTS_args ) {",
1057 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1058 " $nprocessors = $1;",
1059 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1060 " $nprocessors = $1;",
1062 " push(@nonPVM_args, $a);",
1066 "local($return_val) = 0;",
1067 "# Start the parallel execution by calling SysMan",
1068 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1069 "$return_val = $?;",
1070 "# ToDo: fix race condition moving files and flushing them!!",
1071 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1072 "exit($return_val);"
1075 -----------------------------------------------------------------------------
1076 -- Complain about non-dynamic flags in OPTIONS pragmas
1078 checkProcessArgsResult flags filename
1079 = do when (notNull flags) (throwDyn (ProgramError (
1080 showSDoc (hang (text filename <> char ':')
1081 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1082 hsep (map text flags)))
1085 -----------------------------------------------------------------------------
1086 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1088 getHCFilePackages :: FilePath -> IO [PackageId]
1089 getHCFilePackages filename =
1090 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1093 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1094 return (map stringToPackageId (words rest))
1098 -----------------------------------------------------------------------------
1099 -- Static linking, of .o files
1101 -- The list of packages passed to link is the list of packages on
1102 -- which this program depends, as discovered by the compilation
1103 -- manager. It is combined with the list of packages that the user
1104 -- specifies on the command line with -package flags.
1106 -- In one-shot linking mode, we can't discover the package
1107 -- dependencies (because we haven't actually done any compilation or
1108 -- read any interface files), so the user must explicitly specify all
1111 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1112 staticLink dflags o_files dep_packages = do
1113 let verb = getVerbFlag dflags
1114 output_fn = exeFileName dflags
1116 -- get the full list of packages to link with, by combining the
1117 -- explicit packages with the auto packages and all of their
1118 -- dependencies, and eliminating duplicates.
1120 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1121 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1123 let lib_paths = libraryPaths dflags
1124 let lib_path_opts = map ("-L"++) lib_paths
1126 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1128 #ifdef darwin_TARGET_OS
1129 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1130 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1132 let framework_paths = frameworkPaths dflags
1133 framework_path_opts = map ("-F"++) framework_paths
1135 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1136 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1138 let frameworks = cmdlineFrameworks dflags
1139 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1140 -- reverse because they're added in reverse order from the cmd line
1143 -- probably _stub.o files
1144 extra_ld_inputs <- readIORef v_Ld_inputs
1146 -- opts from -optl-<blah> (including -l<blah> options)
1147 let extra_ld_opts = getOpts dflags opt_l
1149 let ways = wayNames dflags
1151 -- Here are some libs that need to be linked at the *end* of
1152 -- the command line, because they contain symbols that are referred to
1153 -- by the RTS. We can't therefore use the ordinary way opts for these.
1155 debug_opts | WayDebug `elem` ways = [
1156 #if defined(HAVE_LIBBFD)
1163 thread_opts | WayThreaded `elem` ways = [
1164 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1167 #if defined(osf3_TARGET_OS)
1173 let (md_c_flags, _) = machdepCCOpts dflags
1174 SysTools.runLink dflags (
1175 [ SysTools.Option verb
1176 , SysTools.Option "-o"
1177 , SysTools.FileOption "" output_fn
1179 ++ map SysTools.Option (
1185 #ifdef darwin_TARGET_OS
1186 ++ framework_path_opts
1189 ++ pkg_lib_path_opts
1191 #ifdef darwin_TARGET_OS
1192 ++ pkg_framework_path_opts
1193 ++ pkg_framework_opts
1199 -- parallel only: move binary to another dir -- HWL
1200 when (WayPar `elem` ways)
1201 (do success <- runPhase_MoveBinary output_fn
1202 if success then return ()
1203 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1206 exeFileName :: DynFlags -> FilePath
1208 | Just s <- outputFile dflags = s
1210 #if defined(mingw32_HOST_OS)
1216 -----------------------------------------------------------------------------
1217 -- Making a DLL (only for Win32)
1219 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1220 doMkDLL dflags o_files dep_packages = do
1221 let verb = getVerbFlag dflags
1222 let static = opt_Static
1223 let no_hs_main = dopt Opt_NoHsMain dflags
1224 let o_file = outputFile dflags
1225 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1227 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1228 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1230 let lib_paths = libraryPaths dflags
1231 let lib_path_opts = map ("-L"++) lib_paths
1233 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1235 -- probably _stub.o files
1236 extra_ld_inputs <- readIORef v_Ld_inputs
1238 -- opts from -optdll-<blah>
1239 let extra_ld_opts = getOpts dflags opt_dll
1241 let pstate = pkgState dflags
1242 rts_id | ExtPackage id <- rtsPackageId pstate = id
1243 | otherwise = panic "staticLink: rts package missing"
1244 base_id | ExtPackage id <- basePackageId pstate = id
1245 | otherwise = panic "staticLink: base package missing"
1246 rts_pkg = getPackageDetails pstate rts_id
1247 base_pkg = getPackageDetails pstate base_id
1249 let extra_os = if static || no_hs_main
1251 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1252 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1254 let (md_c_flags, _) = machdepCCOpts dflags
1255 SysTools.runMkDLL dflags
1256 ([ SysTools.Option verb
1257 , SysTools.Option "-o"
1258 , SysTools.FileOption "" output_fn
1260 ++ map SysTools.Option (
1264 ++ [ "--target=i386-mingw32" ]
1268 ++ pkg_lib_path_opts
1270 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1272 else [ "--export-all" ])
1275 -- -----------------------------------------------------------------------------
1278 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1279 doCpp dflags raw include_cc_opts input_fn output_fn = do
1280 let hscpp_opts = getOpts dflags opt_P
1281 let cmdline_include_paths = includePaths dflags
1283 pkg_include_dirs <- getPackageIncludePath dflags []
1284 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1285 (cmdline_include_paths ++ pkg_include_dirs)
1287 let verb = getVerbFlag dflags
1290 | not include_cc_opts = []
1291 | otherwise = (optc ++ md_c_flags)
1293 optc = getOpts dflags opt_c
1294 (md_c_flags, _) = machdepCCOpts dflags
1296 let cpp_prog args | raw = SysTools.runCpp dflags args
1297 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1300 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1301 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1302 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1303 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1304 -- remember, in code we *compile*, the HOST is the same our TARGET,
1305 -- and BUILD is the same as our HOST.
1307 cpp_prog ([SysTools.Option verb]
1308 ++ map SysTools.Option include_paths
1309 ++ map SysTools.Option hsSourceCppOpts
1310 ++ map SysTools.Option hscpp_opts
1311 ++ map SysTools.Option cc_opts
1312 ++ map SysTools.Option target_defs
1313 ++ [ SysTools.Option "-x"
1314 , SysTools.Option "c"
1315 , SysTools.Option input_fn
1316 -- We hackily use Option instead of FileOption here, so that the file
1317 -- name is not back-slashed on Windows. cpp is capable of
1318 -- dealing with / in filenames, so it works fine. Furthermore
1319 -- if we put in backslashes, cpp outputs #line directives
1320 -- with *double* backslashes. And that in turn means that
1321 -- our error messages get double backslashes in them.
1322 -- In due course we should arrange that the lexer deals
1323 -- with these \\ escapes properly.
1324 , SysTools.Option "-o"
1325 , SysTools.FileOption "" output_fn
1328 cHaskell1Version = "5" -- i.e., Haskell 98
1330 -- Default CPP defines in Haskell source
1332 [ "-D__HASKELL1__="++cHaskell1Version
1333 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1335 , "-D__CONCURRENT_HASKELL__"
1338 -----------------------------------------------------------------------------
1339 -- Reading OPTIONS pragmas
1341 -- This is really very ugly and should be rewritten.
1342 -- - some error messages are thrown as exceptions (should return)
1343 -- - we ignore LINE pragmas
1344 -- - parsing is horrible, combination of prefixMatch and 'read'.
1346 getOptionsFromSource
1347 :: String -- input file
1348 -> IO [String] -- options, if any
1349 getOptionsFromSource file
1350 = do h <- openFile file ReadMode
1351 look h 1 `finally` hClose h
1354 r <- tryJust ioErrors (hGetLine h)
1356 Left e | isEOFError e -> return []
1357 | otherwise -> ioError e
1359 let l = removeSpaces l'
1361 () | null l -> look h (i+1)
1362 | prefixMatch "#" l -> look h (i+1)
1363 | prefixMatch "{-# LINE" l -> look h (i+1) -- -} wrong!
1364 | Just opts <- matchOptions i file l
1365 -> do rest <- look h (i+1)
1366 return (opts ++ rest)
1367 | otherwise -> return []
1369 getOptionsFromStringBuffer :: StringBuffer -> FilePath -> [(Int,String)]
1370 getOptionsFromStringBuffer buffer@(StringBuffer _ len# _) fn =
1372 ls = lines (lexemeToString buffer (I# len#)) -- lazy, so it's ok
1378 let l = removeSpaces l'
1380 () | null l -> look (i+1) ls
1381 | prefixMatch "#" l -> look (i+1) ls
1382 | prefixMatch "{-# LINE" l -> look (i+1) ls -- -} wrong!
1383 | Just opts <- matchOptions i fn l
1384 -> zip (repeat i) opts ++ look (i+1) ls
1387 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1388 -- instead of OPTIONS_GHC, but that is deprecated.
1390 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1391 = matchOptions1 i fn (removeSpaces s1)
1395 matchOptions1 i fn s
1396 | Just s2 <- maybePrefixMatch "OPTIONS" s
1398 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1399 -> matchOptions2 i fn s3
1400 | not (is_ident (head s2))
1401 -> matchOptions2 i fn s2
1403 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1404 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1405 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1406 = Just ["-#include", removeSpaces (reverse s3)]
1408 | Just s2 <- maybePrefixMatch "LANGUAGE" s, not (is_ident (head s2)),
1409 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1410 = case [ exts | (exts,"") <- reads ('[' : reverse (']':s3))] of
1411 [] -> languagePragParseError i fn
1412 exts:_ -> case extensionsToGHCFlag exts of
1413 ([], opts) -> Just opts
1414 (unsup,_) -> unsupportedExtnError i fn unsup
1415 | otherwise = Nothing
1416 matchOptions2 i fn s
1417 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1418 | otherwise = Nothing
1421 languagePragParseError i fn =
1422 pgmError (showSDoc (mkLocMessage loc (
1423 text "cannot parse LANGUAGE pragma")))
1424 where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0)
1426 unsupportedExtnError i fn unsup =
1427 pgmError (showSDoc (mkLocMessage loc (
1428 text "unsupported extensions: " <>
1429 hcat (punctuate comma (map (text.show) unsup)))))
1430 where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0)
1433 optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages
1434 optionsErrorMsgs unhandled_flags flags_lines filename
1435 = (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
1437 unhandled_flags_lines = [ (l,f) | f <- unhandled_flags,
1438 (l,f') <- flags_lines, f == f' ]
1440 ErrUtils.mkPlainErrMsg (srcLocSpan loc) $
1441 text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag
1443 loc = mkSrcLoc (mkFastString filename) line 0
1444 -- ToDo: we need a better SrcSpan here
1446 -- -----------------------------------------------------------------------------
1449 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1450 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1451 hscNextPhase dflags other hsc_lang =
1454 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1456 HscNothing -> StopLn
1457 HscInterpreted -> StopLn
1461 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1462 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1463 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1464 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1467 keep_hc = dopt Opt_KeepHcFiles dflags
1469 -- don't change the lang if we're interpreting
1470 | current_hsc_lang == HscInterpreted = current_hsc_lang
1472 -- force -fvia-C if we are being asked for a .hc file
1473 | HCc <- stop = HscC
1475 -- otherwise, stick to the plan
1476 | otherwise = current_hsc_lang
1478 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1479 -- The split prefix and number of files