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(..) )
45 import RdrName ( GlobalRdrEnv )
48 import StringBuffer ( hGetStringBuffer )
49 import BasicTypes ( SuccessFlag(..) )
50 import Maybes ( expectJust )
51 import Ctype ( is_ident )
52 import StringBuffer ( StringBuffer(..), lexemeToString )
53 import ParserCoreUtils ( getCoreModuleName )
54 import SrcLoc ( srcLocSpan, mkSrcLoc )
55 import FastString ( mkFastString )
56 import Bag ( listToBag, emptyBag )
57 import SrcLoc ( Located(..) )
60 import DATA_IOREF ( readIORef, writeIORef, IORef )
61 import GLAEXTS ( Int(..) )
70 -- ---------------------------------------------------------------------------
73 -- Just preprocess a file, put the result in a temp. file (used by the
74 -- compilation manager during the summary phase).
76 -- We return the augmented DynFlags, because they contain the result
77 -- of slurping in the OPTIONS pragmas
79 preprocess :: DynFlags -> (FilePath, Maybe Phase) -> IO (DynFlags, FilePath)
80 preprocess dflags (filename, mb_phase) =
81 ASSERT2(isJust mb_phase || isHaskellSrcFilename filename, text filename)
82 runPipeline anyHsc dflags (filename, mb_phase) Temporary Nothing{-no ModLocation-}
84 -- ---------------------------------------------------------------------------
87 -- Compile a single module, under the control of the compilation manager.
89 -- This is the interface between the compilation manager and the
90 -- compiler proper (hsc), where we deal with tedious details like
91 -- reading the OPTIONS pragma from the source file, and passing the
92 -- output of hsc through the C compiler.
94 -- NB. No old interface can also mean that the source has changed.
97 -> (Messages -> IO ()) -- error message callback
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 msg_act 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 ("compile: input file " ++ 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
135 (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 (map snd opts)
136 if (not (null unhandled_flags))
137 then do msg_act (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 hscStubCOutName = basename ++ "_stub.c",
161 hscStubHOutName = basename ++ "_stub.h",
162 extCoreName = basename ++ ".hcr" }
164 -- -no-recomp should also work with --make
165 let do_recomp = dopt Opt_RecompChecking dflags
166 source_unchanged = isJust maybe_old_linkable && do_recomp
167 hsc_env' = hsc_env { hsc_dflags = dflags' }
168 object_filename = ml_obj_file location
171 hsc_result <- hscMain hsc_env' msg_act mod_summary
172 source_unchanged have_object old_iface
173 (Just (mod_index, nmods))
176 HscFail -> return CompErrs
178 HscNoRecomp details iface ->
179 ASSERT(isJust maybe_old_linkable)
180 return (CompOK details iface maybe_old_linkable)
182 HscRecomp details iface stub_h_exists stub_c_exists maybe_interpreted_code
184 | isHsBoot src_flavour -- No further compilation to do
185 -> do case hsc_lang of
186 HscInterpreted -> return ()
187 _other -> SysTools.touch dflags' "Touching object file"
189 return (CompOK details iface Nothing)
191 | otherwise -- Normal source file
193 maybe_stub_o <- compileStub dflags' stub_c_exists
194 let stub_unlinked = case maybe_stub_o of
196 Just stub_o -> [ 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"
216 -- We're in --make mode: finish the compilation pipeline.
218 -> do runPipeline StopLn dflags (output_fn,Nothing) Persistent
220 -- The object filename comes from the ModLocation
222 o_time <- getModificationTime object_filename
223 return ([DotO object_filename], o_time)
225 let linkable = LM unlinked_time this_mod
226 (hs_unlinked ++ stub_unlinked)
228 return (CompOK details iface (Just linkable))
230 -----------------------------------------------------------------------------
231 -- stub .h and .c files (for foreign export support)
233 compileStub dflags stub_c_exists
234 | not stub_c_exists = return Nothing
236 -- compile the _stub.c file w/ gcc
237 let stub_c = hscStubCOutName dflags
238 (_, stub_o) <- runPipeline StopLn dflags
239 (stub_c,Nothing) Persistent Nothing{-no ModLocation-}
243 -- ---------------------------------------------------------------------------
246 link :: GhcMode -- interactive or batch
247 -> DynFlags -- dynamic flags
248 -> Bool -- attempt linking in batch mode?
249 -> HomePackageTable -- what to link
252 -- For the moment, in the batch linker, we don't bother to tell doLink
253 -- which packages to link -- it just tries all that are available.
254 -- batch_attempt_linking should only be *looked at* in batch mode. It
255 -- should only be True if the upsweep was successful and someone
256 -- exports main, i.e., we have good reason to believe that linking
260 link Interactive dflags batch_attempt_linking hpt
261 = do -- Not Linking...(demand linker will do the job)
265 link JustTypecheck dflags batch_attempt_linking hpt
268 link BatchCompile dflags batch_attempt_linking hpt
269 | batch_attempt_linking
272 home_mod_infos = moduleEnvElts hpt
274 -- the packages we depend on
275 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
277 -- the linkables to link
278 linkables = map (fromJust.hm_linkable) home_mod_infos
280 debugTraceMsg dflags 3 "link: linkables are ..."
281 debugTraceMsg dflags 3 (showSDoc (vcat (map ppr linkables)))
283 -- check for the -no-link flag
284 if isNoLink (ghcLink dflags)
285 then do debugTraceMsg dflags 3 "link(batch): linking omitted (-c flag given)."
289 debugTraceMsg dflags 1 "Linking ..."
291 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
292 obj_files = concatMap getOfiles linkables
294 -- Don't showPass in Batch mode; doLink will do that for us.
295 staticLink dflags obj_files pkg_deps
297 debugTraceMsg dflags 3 "link: done"
299 -- staticLink only returns if it succeeds
303 = do debugTraceMsg dflags 3 "link(batch): upsweep (partially) failed OR"
304 debugTraceMsg dflags 3 " Main.main not exported; not linking."
308 -- -----------------------------------------------------------------------------
309 -- Compile files in one-shot mode.
311 oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO ()
312 oneShot dflags stop_phase srcs = do
313 o_files <- mapM (compileFile dflags stop_phase) srcs
314 doLink dflags stop_phase o_files
316 compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath
317 compileFile dflags stop_phase (src, mb_phase) = do
318 exists <- doesFileExist src
320 throwDyn (CmdLineError ("does not exist: " ++ src))
323 split = dopt Opt_SplitObjs dflags
324 mb_o_file = outputFile dflags
325 ghc_link = ghcLink dflags -- Set by -c or -no-link
327 -- When linking, the -o argument refers to the linker's output.
328 -- otherwise, we use it as the name for the pipeline's output.
330 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
331 -- -o foo applies to linker
332 | Just o_file <- mb_o_file = SpecificFile o_file
333 -- -o foo applies to the file we are compiling now
334 | otherwise = Persistent
336 stop_phase' = case stop_phase of
337 As | split -> SplitAs
340 (_, out_file) <- runPipeline stop_phase' dflags
341 (src, mb_phase) output Nothing{-no ModLocation-}
345 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
346 doLink dflags stop_phase o_files
347 | not (isStopLn stop_phase)
348 = return () -- We stopped before the linking phase
351 = case ghcLink dflags of
353 StaticLink -> staticLink dflags o_files link_pkgs
354 MkDLL -> doMkDLL dflags o_files link_pkgs
356 -- Always link in the haskell98 package for static linking. Other
357 -- packages have to be specified via the -package flag.
359 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
363 -- ---------------------------------------------------------------------------
364 -- Run a compilation pipeline, consisting of multiple phases.
366 -- This is the interface to the compilation pipeline, which runs
367 -- a series of compilation steps on a single source file, specifying
368 -- at which stage to stop.
370 -- The DynFlags can be modified by phases in the pipeline (eg. by
371 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
376 -- output should be to a temporary file: we're going to
377 -- run more compilation steps on this output later
379 -- we want a persistent file, i.e. a file in the current directory
380 -- derived from the input filename, but with the appropriate extension.
381 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
382 | SpecificFile FilePath
383 -- the output must go into the specified file.
386 :: Phase -- When to stop
387 -> DynFlags -- Dynamic flags
388 -> (FilePath,Maybe Phase) -- Input filename (and maybe -x suffix)
389 -> PipelineOutput -- Output filename
390 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
391 -> IO (DynFlags, FilePath) -- (final flags, output filename)
393 runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc
395 let (basename, suffix) = splitFilename input_fn
397 -- If we were given a -x flag, then use that phase to start from
399 | Just x_phase <- mb_phase = x_phase
400 | otherwise = startPhase suffix
402 -- We want to catch cases of "you can't get there from here" before
403 -- we start the pipeline, because otherwise it will just run off the
406 -- There is a partial ordering on phases, where A < B iff A occurs
407 -- before B in a normal compilation pipeline.
409 when (not (start_phase `happensBefore` stop_phase)) $
411 ("cannot compile this file to desired target: "
414 -- this is a function which will be used to calculate output file names
415 -- as we go along (we partially apply it to some of its inputs here)
416 let get_output_fn = getOutputFilename dflags stop_phase output basename
418 -- Execute the pipeline...
419 (dflags', output_fn, maybe_loc) <-
420 pipeLoop dflags start_phase stop_phase input_fn
421 basename suffix get_output_fn maybe_loc
423 -- Sometimes, a compilation phase doesn't actually generate any output
424 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
425 -- stage, but we wanted to keep the output, then we have to explicitly
429 return (dflags', output_fn)
431 do final_fn <- get_output_fn stop_phase maybe_loc
432 when (final_fn /= output_fn) $
433 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
434 ++ "'") output_fn final_fn
435 return (dflags', final_fn)
439 pipeLoop :: DynFlags -> Phase -> Phase
440 -> FilePath -> String -> Suffix
441 -> (Phase -> Maybe ModLocation -> IO FilePath)
443 -> IO (DynFlags, FilePath, Maybe ModLocation)
445 pipeLoop dflags phase stop_phase
446 input_fn orig_basename orig_suff
447 orig_get_output_fn maybe_loc
449 | phase `eqPhase` stop_phase -- All done
450 = return (dflags, input_fn, maybe_loc)
452 | not (phase `happensBefore` stop_phase)
453 -- Something has gone wrong. We'll try to cover all the cases when
454 -- this could happen, so if we reach here it is a panic.
455 -- eg. it might happen if the -C flag is used on a source file that
456 -- has {-# OPTIONS -fasm #-}.
457 = panic ("pipeLoop: at phase " ++ show phase ++
458 " but I wanted to stop at phase " ++ show stop_phase)
461 = do { (next_phase, dflags', maybe_loc, output_fn)
462 <- runPhase phase stop_phase dflags orig_basename
463 orig_suff input_fn orig_get_output_fn maybe_loc
464 ; pipeLoop dflags' next_phase stop_phase output_fn
465 orig_basename orig_suff orig_get_output_fn maybe_loc }
468 :: DynFlags -> Phase -> PipelineOutput -> String
469 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
470 getOutputFilename dflags stop_phase output basename
474 odir = outputDir dflags
475 osuf = objectSuf dflags
476 keep_hc = dopt Opt_KeepHcFiles dflags
477 keep_raw_s = dopt Opt_KeepRawSFiles dflags
478 keep_s = dopt Opt_KeepSFiles dflags
480 myPhaseInputExt HCc = hcsuf
481 myPhaseInputExt StopLn = osuf
482 myPhaseInputExt other = phaseInputExt other
484 func next_phase maybe_location
485 | is_last_phase, Persistent <- output = persistent_fn
486 | is_last_phase, SpecificFile f <- output = return f
487 | keep_this_output = persistent_fn
488 | otherwise = newTempName dflags suffix
490 is_last_phase = next_phase `eqPhase` stop_phase
492 -- sometimes, we keep output from intermediate stages
496 Mangle | keep_raw_s -> True
498 HCc | keep_hc -> True
501 suffix = myPhaseInputExt next_phase
503 -- persistent object files get put in odir
505 | StopLn <- next_phase = return odir_persistent
506 | otherwise = return persistent
508 persistent = basename `joinFileExt` suffix
511 | Just loc <- maybe_location = ml_obj_file loc
512 | Just d <- odir = replaceFilenameDirectory persistent d
513 | otherwise = persistent
516 -- -----------------------------------------------------------------------------
517 -- Each phase in the pipeline returns the next phase to execute, and the
518 -- name of the file in which the output was placed.
520 -- We must do things dynamically this way, because we often don't know
521 -- what the rest of the phases will be until part-way through the
522 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
523 -- of a source file can change the latter stages of the pipeline from
524 -- taking the via-C route to using the native code generator.
526 runPhase :: Phase -- Do this phase first
527 -> Phase -- Stop just before this phase
529 -> String -- basename of original input source
530 -> String -- its extension
531 -> FilePath -- name of file which contains the input to this phase.
532 -> (Phase -> Maybe ModLocation -> IO FilePath)
533 -- how to calculate the output filename
534 -> Maybe ModLocation -- the ModLocation, if we have one
535 -> IO (Phase, -- next phase
536 DynFlags, -- new dynamic flags
537 Maybe ModLocation, -- the ModLocation, if we have one
538 FilePath) -- output filename
540 -- Invariant: the output filename always contains the output
541 -- Interesting case: Hsc when there is no recompilation to do
542 -- Then the output filename is still a .o file
544 -------------------------------------------------------------------------------
547 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
548 = do let unlit_flags = getOpts dflags opt_L
549 -- The -h option passes the file name for unlit to put in a #line directive
550 output_fn <- get_output_fn (Cpp sf) maybe_loc
552 SysTools.runUnlit dflags
553 (map SysTools.Option unlit_flags ++
554 [ SysTools.Option "-h"
555 , SysTools.Option input_fn
556 , SysTools.FileOption "" input_fn
557 , SysTools.FileOption "" output_fn
560 return (Cpp sf, dflags, maybe_loc, output_fn)
562 -------------------------------------------------------------------------------
563 -- Cpp phase : (a) gets OPTIONS out of file
564 -- (b) runs cpp if necessary
566 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
567 = do src_opts <- getOptionsFromSource input_fn
568 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
569 checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff)
571 if not (dopt Opt_Cpp dflags) then
572 -- no need to preprocess CPP, just pass input file along
573 -- to the next phase of the pipeline.
574 return (HsPp sf, dflags, maybe_loc, input_fn)
576 output_fn <- get_output_fn (HsPp sf) maybe_loc
577 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
578 return (HsPp sf, dflags, maybe_loc, output_fn)
580 -------------------------------------------------------------------------------
583 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
584 = do if not (dopt Opt_Pp dflags) then
585 -- no need to preprocess, just pass input file along
586 -- to the next phase of the pipeline.
587 return (Hsc sf, dflags, maybe_loc, input_fn)
589 let hspp_opts = getOpts dflags opt_F
590 let orig_fn = basename `joinFileExt` suff
591 output_fn <- get_output_fn (Hsc sf) maybe_loc
592 SysTools.runPp dflags
593 ( [ SysTools.Option orig_fn
594 , SysTools.Option input_fn
595 , SysTools.FileOption "" output_fn
597 map SysTools.Option hspp_opts
599 return (Hsc sf, dflags, maybe_loc, output_fn)
601 -----------------------------------------------------------------------------
604 -- Compilation of a single module, in "legacy" mode (_not_ under
605 -- the direction of the compilation manager).
606 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
607 = do -- normal Hsc mode, not mkdependHS
609 -- we add the current directory (i.e. the directory in which
610 -- the .hs files resides) to the import path, since this is
611 -- what gcc does, and it's probably what you want.
612 let current_dir = directoryOf basename
614 paths = includePaths dflags0
615 dflags = dflags0 { includePaths = current_dir : paths }
617 -- gather the imports and module name
618 (hspp_buf,mod_name) <-
620 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
621 ; m <- getCoreModuleName input_fn
622 ; return (Nothing, mkModule m) }
624 other -> do { buf <- hGetStringBuffer input_fn
625 ; (_,_,L _ mod_name) <- getImports dflags buf input_fn
626 ; return (Just buf, mod_name) }
628 -- Build a ModLocation to pass to hscMain.
629 -- The source filename is rather irrelevant by now, but it's used
630 -- by hscMain for messages. hscMain also needs
631 -- the .hi and .o filenames, and this is as good a way
632 -- as any to generate them, and better than most. (e.g. takes
633 -- into accout the -osuf flags)
634 location1 <- mkHomeModLocation2 dflags mod_name basename suff
636 -- Boot-ify it if necessary
637 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
638 | otherwise = location1
641 -- Take -ohi into account if present
642 -- This can't be done in mkHomeModuleLocation because
643 -- it only applies to the module being compiles
644 let ohi = outputHi dflags
645 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
646 | otherwise = location2
648 -- Take -o into account if present
649 -- Very like -ohi, but we must *only* do this if we aren't linking
650 -- (If we're linking then the -o applies to the linked thing, not to
651 -- the object file for one module.)
652 -- Note the nasty duplication with the same computation in compileFile above
653 let expl_o_file = outputFile dflags
654 location4 | Just ofile <- expl_o_file
655 , isNoLink (ghcLink dflags)
656 = location3 { ml_obj_file = ofile }
657 | otherwise = location3
659 -- Make the ModSummary to hand to hscMain
660 src_timestamp <- getModificationTime (basename `joinFileExt` suff)
662 unused_field = panic "runPhase:ModSummary field"
663 -- Some fields are not looked at by hscMain
664 mod_summary = ModSummary { ms_mod = mod_name,
665 ms_hsc_src = src_flavour,
666 ms_hspp_file = Just input_fn,
667 ms_hspp_buf = hspp_buf,
668 ms_location = location4,
669 ms_hs_date = src_timestamp,
670 ms_obj_date = Nothing,
671 ms_imps = unused_field,
672 ms_srcimps = unused_field }
674 o_file = ml_obj_file location4 -- The real object file
677 -- Figure out if the source has changed, for recompilation avoidance.
679 -- Setting source_unchanged to True means that M.o seems
680 -- to be up to date wrt M.hs; so no need to recompile unless imports have
681 -- changed (which the compiler itself figures out).
682 -- Setting source_unchanged to False tells the compiler that M.o is out of
683 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
684 let do_recomp = dopt Opt_RecompChecking dflags
686 if not do_recomp || not (isStopLn stop)
687 -- Set source_unchanged to False unconditionally if
688 -- (a) recompilation checker is off, or
689 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
691 -- Otherwise look at file modification dates
692 else do o_file_exists <- doesFileExist o_file
694 then return False -- Need to recompile
695 else do t2 <- getModificationTime o_file
696 if t2 > src_timestamp
701 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
702 let next_phase = hscNextPhase dflags src_flavour hsc_lang
703 output_fn <- get_output_fn next_phase (Just location4)
705 let dflags' = dflags { hscTarget = hsc_lang,
706 hscOutName = output_fn,
707 hscStubCOutName = basename ++ "_stub.c",
708 hscStubHOutName = basename ++ "_stub.h",
709 extCoreName = basename ++ ".hcr" }
711 hsc_env <- newHscEnv dflags'
713 -- Tell the finder cache about this module
714 addHomeModuleToFinder hsc_env mod_name location4
717 result <- hscMain hsc_env printErrorsAndWarnings
718 mod_summary source_unchanged
719 False -- No object file
721 Nothing -- No "module i of n" progress info
725 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
727 HscNoRecomp details iface -> do
728 SysTools.touch dflags' "Touching object file" o_file
729 -- The .o file must have a later modification date
730 -- than the source file (else we wouldn't be in HscNoRecomp)
731 -- but we touch it anyway, to keep 'make' happy (we think).
732 return (StopLn, dflags', Just location4, o_file)
734 HscRecomp _details _iface
735 stub_h_exists stub_c_exists
736 _maybe_interpreted_code -> do
739 maybe_stub_o <- compileStub dflags' stub_c_exists
742 Just stub_o -> consIORef v_Ld_inputs stub_o
744 -- In the case of hs-boot files, generate a dummy .o-boot
745 -- stamp file for the benefit of Make
747 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
750 return (next_phase, dflags', Just location4, output_fn)
752 -----------------------------------------------------------------------------
755 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
757 output_fn <- get_output_fn Cmm maybe_loc
758 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
759 return (Cmm, dflags, maybe_loc, output_fn)
761 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
763 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
764 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
765 output_fn <- get_output_fn next_phase maybe_loc
767 let dflags' = dflags { hscTarget = hsc_lang,
768 hscOutName = output_fn,
769 hscStubCOutName = basename ++ "_stub.c",
770 hscStubHOutName = basename ++ "_stub.h",
771 extCoreName = basename ++ ".hcr" }
773 ok <- hscCmmFile dflags' input_fn
775 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
777 return (next_phase, dflags, maybe_loc, output_fn)
779 -----------------------------------------------------------------------------
782 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
783 -- way too many hacks, and I can't say I've ever used it anyway.
785 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
786 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
787 = do let cc_opts = getOpts dflags opt_c
788 hcc = cc_phase `eqPhase` HCc
790 let cmdline_include_paths = includePaths dflags
792 -- HC files have the dependent packages stamped into them
793 pkgs <- if hcc then getHCFilePackages input_fn else return []
795 -- add package include paths even if we're just compiling .c
796 -- files; this is the Value Add(TM) that using ghc instead of
798 pkg_include_dirs <- getPackageIncludePath dflags pkgs
799 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
800 (cmdline_include_paths ++ pkg_include_dirs)
802 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
803 let pic_c_flags = picCCOpts dflags
805 let verb = getVerbFlag dflags
807 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
809 let split_objs = dopt Opt_SplitObjs dflags
810 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
813 let excessPrecision = dopt Opt_ExcessPrecision dflags
817 let mangle = dopt Opt_DoAsmMangling dflags
819 | hcc && mangle = Mangle
821 output_fn <- get_output_fn next_phase maybe_loc
823 SysTools.runCc dflags (
824 -- force the C compiler to interpret this file as C when
825 -- compiling .hc files, by adding the -x c option.
826 -- Also useful for plain .c files, just in case GHC saw a
828 [ SysTools.Option "-x", SysTools.Option "c"] ++
829 [ SysTools.FileOption "" input_fn
830 , SysTools.Option "-o"
831 , SysTools.FileOption "" output_fn
833 ++ map SysTools.Option (
839 ++ [ verb, "-S", "-Wimplicit", "-O" ]
840 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
843 ++ (if excessPrecision then [] else [ "-ffloat-store" ])
848 return (next_phase, dflags, maybe_loc, output_fn)
850 -- ToDo: postprocess the output from gcc
852 -----------------------------------------------------------------------------
855 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
856 = do let mangler_opts = getOpts dflags opt_m
859 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
861 machdep_opts <- return []
864 let split = dopt Opt_SplitObjs dflags
866 | split = SplitMangle
868 output_fn <- get_output_fn next_phase maybe_loc
870 SysTools.runMangle dflags (map SysTools.Option mangler_opts
871 ++ [ SysTools.FileOption "" input_fn
872 , SysTools.FileOption "" output_fn
874 ++ map SysTools.Option machdep_opts)
876 return (next_phase, dflags, maybe_loc, output_fn)
878 -----------------------------------------------------------------------------
881 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
882 = do -- tmp_pfx is the prefix used for the split .s files
883 -- We also use it as the file to contain the no. of split .s files (sigh)
884 split_s_prefix <- SysTools.newTempName dflags "split"
885 let n_files_fn = split_s_prefix
887 SysTools.runSplit dflags
888 [ SysTools.FileOption "" input_fn
889 , SysTools.FileOption "" split_s_prefix
890 , SysTools.FileOption "" n_files_fn
893 -- Save the number of split files for future references
894 s <- readFile n_files_fn
895 let n_files = read s :: Int
896 writeIORef v_Split_info (split_s_prefix, n_files)
898 -- Remember to delete all these files
899 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
902 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
903 -- we don't use the filename
905 -----------------------------------------------------------------------------
908 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
909 = do let as_opts = getOpts dflags opt_a
910 let cmdline_include_paths = includePaths dflags
912 output_fn <- get_output_fn StopLn maybe_loc
914 -- we create directories for the object file, because it
915 -- might be a hierarchical module.
916 createDirectoryHierarchy (directoryOf output_fn)
918 SysTools.runAs dflags
919 (map SysTools.Option as_opts
920 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
921 ++ [ SysTools.Option "-c"
922 , SysTools.FileOption "" input_fn
923 , SysTools.Option "-o"
924 , SysTools.FileOption "" output_fn
927 return (StopLn, dflags, maybe_loc, output_fn)
930 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
931 = do let as_opts = getOpts dflags opt_a
933 (split_s_prefix, n) <- readIORef v_Split_info
936 | Just d <- outputDir dflags = d
937 | otherwise = basename ++ "_split"
940 = do let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
941 let output_o = replaceFilenameDirectory
942 (basename ++ "__" ++ show n ++ ".o")
944 let osuf = objectSuf dflags
945 let real_o = replaceFilenameSuffix output_o osuf
946 SysTools.runAs dflags
947 (map SysTools.Option as_opts ++
948 [ SysTools.Option "-c"
949 , SysTools.Option "-o"
950 , SysTools.FileOption "" real_o
951 , SysTools.FileOption "" input_s
954 mapM_ assemble_file [1..n]
956 output_fn <- get_output_fn StopLn maybe_loc
957 return (StopLn, dflags, maybe_loc, output_fn)
959 -----------------------------------------------------------------------------
960 -- MoveBinary sort-of-phase
961 -- After having produced a binary, move it somewhere else and generate a
962 -- wrapper script calling the binary. Currently, we need this only in
963 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
964 -- central directory.
965 -- This is called from staticLink below, after linking. I haven't made it
966 -- a separate phase to minimise interfering with other modules, and
967 -- we don't need the generality of a phase (MoveBinary is always
968 -- done after linking and makes only sense in a parallel setup) -- HWL
970 runPhase_MoveBinary input_fn
973 pvm_root <- getEnv "PVM_ROOT"
974 pvm_arch <- getEnv "PVM_ARCH"
976 pvm_executable_base = "=" ++ input_fn
977 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
978 -- nuke old binary; maybe use configur'ed names for cp and rm?
979 system ("rm -f " ++ pvm_executable)
980 -- move the newly created binary into PVM land
981 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
982 -- generate a wrapper script for running a parallel prg under PVM
983 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
986 -- generates a Perl skript starting a parallel prg under PVM
987 mk_pvm_wrapper_script :: String -> String -> String -> String
988 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
990 "eval 'exec perl -S $0 ${1+\"$@\"}'",
991 " if $running_under_some_shell;",
992 "# =!=!=!=!=!=!=!=!=!=!=!",
993 "# This script is automatically generated: DO NOT EDIT!!!",
994 "# Generated by Glasgow Haskell Compiler",
995 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
997 "$pvm_executable = '" ++ pvm_executable ++ "';",
998 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
999 "$SysMan = '" ++ sysMan ++ "';",
1001 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
1002 "# first, some magical shortcuts to run "commands" on the binary",
1003 "# (which is hidden)",
1004 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1005 " local($cmd) = $1;",
1006 " system("$cmd $pvm_executable");",
1007 " exit(0); # all done",
1010 "# Now, run the real binary; process the args first",
1011 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1013 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1014 "@nonPVM_args = ();",
1015 "$in_RTS_args = 0;",
1017 "args: while ($a = shift(@ARGV)) {",
1018 " if ( $a eq '+RTS' ) {",
1019 " $in_RTS_args = 1;",
1020 " } elsif ( $a eq '-RTS' ) {",
1021 " $in_RTS_args = 0;",
1023 " if ( $a eq '-d' && $in_RTS_args ) {",
1025 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1026 " $nprocessors = $1;",
1027 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1028 " $nprocessors = $1;",
1030 " push(@nonPVM_args, $a);",
1034 "local($return_val) = 0;",
1035 "# Start the parallel execution by calling SysMan",
1036 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1037 "$return_val = $?;",
1038 "# ToDo: fix race condition moving files and flushing them!!",
1039 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1040 "exit($return_val);"
1043 -----------------------------------------------------------------------------
1044 -- Complain about non-dynamic flags in OPTIONS pragmas
1046 checkProcessArgsResult flags filename
1047 = do when (notNull flags) (throwDyn (ProgramError (
1048 showSDoc (hang (text filename <> char ':')
1049 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1050 hsep (map text flags)))
1053 -----------------------------------------------------------------------------
1054 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1056 getHCFilePackages :: FilePath -> IO [PackageId]
1057 getHCFilePackages filename =
1058 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1061 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1062 return (map stringToPackageId (words rest))
1066 -----------------------------------------------------------------------------
1067 -- Static linking, of .o files
1069 -- The list of packages passed to link is the list of packages on
1070 -- which this program depends, as discovered by the compilation
1071 -- manager. It is combined with the list of packages that the user
1072 -- specifies on the command line with -package flags.
1074 -- In one-shot linking mode, we can't discover the package
1075 -- dependencies (because we haven't actually done any compilation or
1076 -- read any interface files), so the user must explicitly specify all
1079 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1080 staticLink dflags o_files dep_packages = do
1081 let verb = getVerbFlag dflags
1083 -- get the full list of packages to link with, by combining the
1084 -- explicit packages with the auto packages and all of their
1085 -- dependencies, and eliminating duplicates.
1087 let o_file = outputFile dflags
1088 #if defined(mingw32_HOST_OS)
1089 let output_fn = case o_file of { Just s -> s; Nothing -> "main.exe"; }
1091 let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; }
1094 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1095 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1097 let lib_paths = libraryPaths dflags
1098 let lib_path_opts = map ("-L"++) lib_paths
1100 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1102 #ifdef darwin_TARGET_OS
1103 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1104 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1106 let framework_paths = frameworkPaths dflags
1107 framework_path_opts = map ("-F"++) framework_paths
1109 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1110 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1112 let frameworks = cmdlineFrameworks dflags
1113 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1114 -- reverse because they're added in reverse order from the cmd line
1117 -- probably _stub.o files
1118 extra_ld_inputs <- readIORef v_Ld_inputs
1120 -- opts from -optl-<blah> (including -l<blah> options)
1121 let extra_ld_opts = getOpts dflags opt_l
1123 let ways = wayNames dflags
1125 -- Here are some libs that need to be linked at the *end* of
1126 -- the command line, because they contain symbols that are referred to
1127 -- by the RTS. We can't therefore use the ordinary way opts for these.
1129 debug_opts | WayDebug `elem` ways = [
1130 #if defined(HAVE_LIBBFD)
1137 thread_opts | WayThreaded `elem` ways = [
1138 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1141 #if defined(osf3_TARGET_OS)
1147 let (md_c_flags, _) = machdepCCOpts dflags
1148 SysTools.runLink dflags (
1149 [ SysTools.Option verb
1150 , SysTools.Option "-o"
1151 , SysTools.FileOption "" output_fn
1153 ++ map SysTools.Option (
1159 #ifdef darwin_TARGET_OS
1160 ++ framework_path_opts
1163 ++ pkg_lib_path_opts
1165 #ifdef darwin_TARGET_OS
1166 ++ pkg_framework_path_opts
1167 ++ pkg_framework_opts
1173 -- parallel only: move binary to another dir -- HWL
1174 when (WayPar `elem` ways)
1175 (do success <- runPhase_MoveBinary output_fn
1176 if success then return ()
1177 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1179 -----------------------------------------------------------------------------
1180 -- Making a DLL (only for Win32)
1182 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1183 doMkDLL dflags o_files dep_packages = do
1184 let verb = getVerbFlag dflags
1185 let static = opt_Static
1186 let no_hs_main = dopt Opt_NoHsMain dflags
1187 let o_file = outputFile dflags
1188 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1190 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1191 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1193 let lib_paths = libraryPaths dflags
1194 let lib_path_opts = map ("-L"++) lib_paths
1196 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1198 -- probably _stub.o files
1199 extra_ld_inputs <- readIORef v_Ld_inputs
1201 -- opts from -optdll-<blah>
1202 let extra_ld_opts = getOpts dflags opt_dll
1204 let pstate = pkgState dflags
1205 rts_id | ExtPackage id <- rtsPackageId pstate = id
1206 | otherwise = panic "staticLink: rts package missing"
1207 base_id | ExtPackage id <- basePackageId pstate = id
1208 | otherwise = panic "staticLink: base package missing"
1209 rts_pkg = getPackageDetails pstate rts_id
1210 base_pkg = getPackageDetails pstate base_id
1212 let extra_os = if static || no_hs_main
1214 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1215 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1217 let (md_c_flags, _) = machdepCCOpts dflags
1218 SysTools.runMkDLL dflags
1219 ([ SysTools.Option verb
1220 , SysTools.Option "-o"
1221 , SysTools.FileOption "" output_fn
1223 ++ map SysTools.Option (
1227 ++ [ "--target=i386-mingw32" ]
1231 ++ pkg_lib_path_opts
1233 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1235 else [ "--export-all" ])
1238 -- -----------------------------------------------------------------------------
1241 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1242 doCpp dflags raw include_cc_opts input_fn output_fn = do
1243 let hscpp_opts = getOpts dflags opt_P
1244 let cmdline_include_paths = includePaths dflags
1246 pkg_include_dirs <- getPackageIncludePath dflags []
1247 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1248 (cmdline_include_paths ++ pkg_include_dirs)
1250 let verb = getVerbFlag dflags
1253 | not include_cc_opts = []
1254 | otherwise = (optc ++ md_c_flags)
1256 optc = getOpts dflags opt_c
1257 (md_c_flags, _) = machdepCCOpts dflags
1259 let cpp_prog args | raw = SysTools.runCpp dflags args
1260 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1263 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1264 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1265 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1266 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1267 -- remember, in code we *compile*, the HOST is the same our TARGET,
1268 -- and BUILD is the same as our HOST.
1270 cpp_prog ([SysTools.Option verb]
1271 ++ map SysTools.Option include_paths
1272 ++ map SysTools.Option hsSourceCppOpts
1273 ++ map SysTools.Option hscpp_opts
1274 ++ map SysTools.Option cc_opts
1275 ++ map SysTools.Option target_defs
1276 ++ [ SysTools.Option "-x"
1277 , SysTools.Option "c"
1278 , SysTools.Option input_fn
1279 -- We hackily use Option instead of FileOption here, so that the file
1280 -- name is not back-slashed on Windows. cpp is capable of
1281 -- dealing with / in filenames, so it works fine. Furthermore
1282 -- if we put in backslashes, cpp outputs #line directives
1283 -- with *double* backslashes. And that in turn means that
1284 -- our error messages get double backslashes in them.
1285 -- In due course we should arrange that the lexer deals
1286 -- with these \\ escapes properly.
1287 , SysTools.Option "-o"
1288 , SysTools.FileOption "" output_fn
1291 cHaskell1Version = "5" -- i.e., Haskell 98
1293 -- Default CPP defines in Haskell source
1295 [ "-D__HASKELL1__="++cHaskell1Version
1296 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1298 , "-D__CONCURRENT_HASKELL__"
1301 -----------------------------------------------------------------------------
1302 -- Reading OPTIONS pragmas
1304 getOptionsFromSource
1305 :: String -- input file
1306 -> IO [String] -- options, if any
1307 getOptionsFromSource file
1308 = do h <- openFile file ReadMode
1309 look h `finally` hClose h
1312 r <- tryJust ioErrors (hGetLine h)
1314 Left e | isEOFError e -> return []
1315 | otherwise -> ioError e
1317 let l = removeSpaces l'
1319 () | null l -> look h
1320 | prefixMatch "#" l -> look h
1321 | prefixMatch "{-# LINE" l -> look h -- -}
1322 | Just opts <- matchOptions l
1323 -> do rest <- look h
1324 return (opts ++ rest)
1325 | otherwise -> return []
1327 getOptionsFromStringBuffer :: StringBuffer -> [(Int,String)]
1328 getOptionsFromStringBuffer buffer@(StringBuffer _ len# _) =
1330 ls = lines (lexemeToString buffer (I# len#)) -- lazy, so it's ok
1336 let l = removeSpaces l'
1338 () | null l -> look (i+1) ls
1339 | prefixMatch "#" l -> look (i+1) ls
1340 | prefixMatch "{-# LINE" l -> look (i+1) ls -- -}
1341 | Just opts <- matchOptions l
1342 -> zip (repeat i) opts ++ look (i+1) ls
1345 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1346 -- instead of OPTIONS_GHC, but that is deprecated.
1348 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1349 = matchOptions1 (removeSpaces s1)
1354 | Just s2 <- maybePrefixMatch "OPTIONS" s
1356 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1358 | not (is_ident (head s2))
1361 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1362 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1363 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1364 = Just ["-#include", removeSpaces (reverse s3)]
1365 | otherwise = Nothing
1367 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1368 | otherwise = Nothing
1371 optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages
1372 optionsErrorMsgs unhandled_flags flags_lines filename
1373 = (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
1375 unhandled_flags_lines = [ (l,f) | f <- unhandled_flags,
1376 (l,f') <- flags_lines, f == f' ]
1378 ErrUtils.mkPlainErrMsg (srcLocSpan loc) $
1379 text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag
1381 loc = mkSrcLoc (mkFastString filename) line 0
1382 -- ToDo: we need a better SrcSpan here
1384 -- -----------------------------------------------------------------------------
1387 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1388 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1389 hscNextPhase dflags other hsc_lang =
1392 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1394 HscNothing -> StopLn
1395 HscInterpreted -> StopLn
1399 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1400 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1401 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1402 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1405 keep_hc = dopt Opt_KeepHcFiles dflags
1407 -- don't change the lang if we're interpreting
1408 | current_hsc_lang == HscInterpreted = current_hsc_lang
1410 -- force -fvia-C if we are being asked for a .hc file
1411 | HCc <- stop = HscC
1413 -- otherwise, stick to the plan
1414 | otherwise = current_hsc_lang
1416 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1417 -- The split prefix and number of files