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(..),
27 #include "HsVersions.h"
32 import SysTools ( newTempName, addFilesToClean, copy )
33 import qualified SysTools
39 import UniqFM ( eltsUFM )
42 import StaticFlags ( v_Ld_inputs, opt_Static, WayName(..) )
46 import StringBuffer ( hGetStringBuffer )
47 import BasicTypes ( SuccessFlag(..) )
48 import Maybes ( expectJust )
49 import ParserCoreUtils ( getCoreModuleName )
50 import SrcLoc ( unLoc )
51 import SrcLoc ( Located(..) )
54 import DATA_IOREF ( readIORef, writeIORef, IORef )
55 import GLAEXTS ( Int(..) )
61 import Data.List ( isSuffixOf )
65 -- ---------------------------------------------------------------------------
68 -- Just preprocess a file, put the result in a temp. file (used by the
69 -- compilation manager during the summary phase).
71 -- We return the augmented DynFlags, because they contain the result
72 -- of slurping in the OPTIONS pragmas
74 preprocess :: DynFlags -> (FilePath, Maybe Phase) -> IO (DynFlags, FilePath)
75 preprocess dflags (filename, mb_phase) =
76 ASSERT2(isJust mb_phase || isHaskellSrcFilename filename, text filename)
77 runPipeline anyHsc dflags (filename, mb_phase) Temporary Nothing{-no ModLocation-}
79 -- ---------------------------------------------------------------------------
82 -- Compile a single module, under the control of the compilation manager.
84 -- This is the interface between the compilation manager and the
85 -- compiler proper (hsc), where we deal with tedious details like
86 -- reading the OPTIONS pragma from the source file, and passing the
87 -- output of hsc through the C compiler.
89 -- NB. No old interface can also mean that the source has changed.
93 -> Maybe Linkable -- Just linkable <=> source unchanged
94 -> Maybe ModIface -- Old interface, if available
99 = CompOK ModDetails -- New details
100 ModIface -- New iface
101 (Maybe Linkable) -- a Maybe, for the same reasons as hm_linkable
106 compile hsc_env mod_summary maybe_old_linkable old_iface mod_index nmods = do
108 let dflags0 = ms_hspp_opts mod_summary
109 this_mod = ms_mod mod_summary
110 src_flavour = ms_hsc_src mod_summary
113 | Just l <- maybe_old_linkable, isObjectLinkable l = True
116 -- FIXME: We need to know whether or not we're recompiling the file. Move this to HscMain?
117 --showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary)
119 let location = ms_location mod_summary
120 let input_fn = expectJust "compile:hs" (ml_hs_file location)
121 let input_fnpp = ms_hspp_file mod_summary
123 debugTraceMsg dflags0 2 (text "compile: input file" <+> text input_fnpp)
125 let (basename, _) = splitFilename input_fn
127 -- We add the directory in which the .hs files resides) to the import path.
128 -- This is needed when we try to compile the .hc file later, if it
129 -- imports a _stub.h file that we created here.
130 let current_dir = directoryOf basename
131 old_paths = includePaths dflags0
132 dflags = dflags0 { includePaths = current_dir : old_paths }
134 -- Figure out what lang we're generating
135 let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags)
136 -- ... and what the next phase should be
137 let next_phase = hscNextPhase dflags src_flavour hsc_lang
138 -- ... and what file to generate the output into
139 output_fn <- getOutputFilename next_phase
140 Temporary basename dflags next_phase (Just location)
142 let dflags' = dflags { hscTarget = hsc_lang,
143 hscOutName = output_fn,
144 extCoreName = basename ++ ".hcr" }
146 -- -no-recomp should also work with --make
147 let do_recomp = dopt Opt_RecompChecking dflags
148 source_unchanged = isJust maybe_old_linkable && do_recomp
149 hsc_env' = hsc_env { hsc_dflags = dflags' }
150 object_filename = ml_obj_file location
152 let getStubLinkable False = return []
154 = do stub_o <- compileStub dflags' this_mod location
155 return [ DotO stub_o ]
157 handleBatch (HscNoRecomp, iface, details)
158 = ASSERT (isJust maybe_old_linkable)
159 return (CompOK details iface maybe_old_linkable)
160 handleBatch (HscRecomp hasStub, iface, details)
161 | isHsBoot src_flavour
162 = return (CompOK details iface Nothing)
164 = do stub_unlinked <- getStubLinkable hasStub
165 (hs_unlinked, unlinked_time) <-
168 -> return ([], ms_hs_date mod_summary)
169 -- We're in --make mode: finish the compilation pipeline.
171 -> do runPipeline StopLn dflags (output_fn,Nothing) Persistent
173 -- The object filename comes from the ModLocation
174 o_time <- getModificationTime object_filename
175 return ([DotO object_filename], o_time)
176 let linkable = LM unlinked_time this_mod
177 (hs_unlinked ++ stub_unlinked)
178 return (CompOK details iface (Just linkable))
180 handleInterpreted (InteractiveNoRecomp, iface, details)
181 = ASSERT (isJust maybe_old_linkable)
182 return (CompOK details iface maybe_old_linkable)
183 handleInterpreted (InteractiveRecomp hasStub comp_bc, iface, details)
184 = do stub_unlinked <- getStubLinkable hasStub
185 let hs_unlinked = [BCOs comp_bc]
186 unlinked_time = ms_hs_date mod_summary
187 -- Why do we use the timestamp of the source file here,
188 -- rather than the current time? This works better in
189 -- the case where the local clock is out of sync
190 -- with the filesystem's clock. It's just as accurate:
191 -- if the source is modified, then the linkable will
193 let linkable = LM unlinked_time this_mod
194 (hs_unlinked ++ stub_unlinked)
195 return (CompOK details iface (Just linkable))
197 let runCompiler compiler handle
198 = do mbResult <- compiler hsc_env' mod_summary
199 source_unchanged old_iface
200 (Just (mod_index, nmods))
202 Nothing -> return CompErrs
203 Just result -> handle result
206 HscInterpreted | not (isHsBoot src_flavour) -- We can't compile boot files to
207 -- bytecode so don't even try.
208 -> runCompiler hscCompileInteractive handleInterpreted
210 -> runCompiler hscCompileNothing handleBatch
212 -> runCompiler hscCompileBatch handleBatch
214 -----------------------------------------------------------------------------
215 -- stub .h and .c files (for foreign export support)
217 -- The _stub.c file is derived from the haskell source file, possibly taking
218 -- into account the -stubdir option.
220 -- Consequently, we derive the _stub.o filename from the haskell object
223 -- This isn't necessarily the same as the object filename we
224 -- would get if we just compiled the _stub.c file using the pipeline.
227 -- ghc src/A.hs -odir obj
229 -- results in obj/A.o, and src/A_stub.c. If we compile src/A_stub.c with
230 -- -odir obj, we would get obj/src/A_stub.o, which is wrong; we want
233 compileStub :: DynFlags -> Module -> ModLocation -> IO FilePath
234 compileStub dflags mod location = do
235 let (o_base, o_ext) = splitFilename (ml_obj_file location)
236 stub_o = o_base ++ "_stub" `joinFileExt` o_ext
238 -- compile the _stub.c file w/ gcc
239 let (stub_c,_) = mkStubPaths dflags (moduleName mod) location
240 runPipeline StopLn dflags (stub_c,Nothing)
241 (SpecificFile stub_o) Nothing{-no ModLocation-}
246 -- ---------------------------------------------------------------------------
249 link :: GhcMode -- interactive or batch
250 -> DynFlags -- dynamic flags
251 -> Bool -- attempt linking in batch mode?
252 -> HomePackageTable -- what to link
255 -- For the moment, in the batch linker, we don't bother to tell doLink
256 -- which packages to link -- it just tries all that are available.
257 -- batch_attempt_linking should only be *looked at* in batch mode. It
258 -- should only be True if the upsweep was successful and someone
259 -- exports main, i.e., we have good reason to believe that linking
263 link Interactive dflags batch_attempt_linking hpt
264 = do -- Not Linking...(demand linker will do the job)
268 link JustTypecheck dflags batch_attempt_linking hpt
271 link BatchCompile dflags batch_attempt_linking hpt
272 | batch_attempt_linking
275 home_mod_infos = eltsUFM hpt
277 -- the packages we depend on
278 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
280 -- the linkables to link
281 linkables = map (expectJust "link".hm_linkable) home_mod_infos
283 debugTraceMsg dflags 3 (text "link: linkables are ..." $$ vcat (map ppr linkables))
285 -- check for the -no-link flag
286 if isNoLink (ghcLink dflags)
287 then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).")
291 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
292 obj_files = concatMap getOfiles linkables
294 exe_file = exeFileName dflags
296 -- if the modification time on the executable is later than the
297 -- modification times on all of the objects, then omit linking
298 -- (unless the -no-recomp flag was given).
299 e_exe_time <- IO.try $ getModificationTime exe_file
301 | Left _ <- e_exe_time = True
302 | Right t <- e_exe_time =
303 any (t <) (map linkableTime linkables)
305 if dopt Opt_RecompChecking dflags && not linking_needed
306 then do debugTraceMsg dflags 2 (text exe_file <+> ptext SLIT("is up to date, linking not required."))
310 debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file
313 -- Don't showPass in Batch mode; doLink will do that for us.
314 let link = case ghcLink dflags of
316 StaticLink -> staticLink
317 link dflags obj_files pkg_deps
319 debugTraceMsg dflags 3 (text "link: done")
321 -- staticLink only returns if it succeeds
325 = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$
326 text " Main.main not exported; not linking.")
330 -- -----------------------------------------------------------------------------
331 -- Compile files in one-shot mode.
333 oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO ()
334 oneShot dflags stop_phase srcs = do
335 o_files <- mapM (compileFile dflags stop_phase) srcs
336 doLink dflags stop_phase o_files
338 compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath
339 compileFile dflags stop_phase (src, mb_phase) = do
340 exists <- doesFileExist src
342 throwDyn (CmdLineError ("does not exist: " ++ src))
345 split = dopt Opt_SplitObjs dflags
346 mb_o_file = outputFile dflags
347 ghc_link = ghcLink dflags -- Set by -c or -no-link
349 -- When linking, the -o argument refers to the linker's output.
350 -- otherwise, we use it as the name for the pipeline's output.
352 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
353 -- -o foo applies to linker
354 | Just o_file <- mb_o_file = SpecificFile o_file
355 -- -o foo applies to the file we are compiling now
356 | otherwise = Persistent
358 stop_phase' = case stop_phase of
359 As | split -> SplitAs
362 (_, out_file) <- runPipeline stop_phase' dflags
363 (src, mb_phase) output Nothing{-no ModLocation-}
367 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
368 doLink dflags stop_phase o_files
369 | not (isStopLn stop_phase)
370 = return () -- We stopped before the linking phase
373 = case ghcLink dflags of
375 StaticLink -> staticLink dflags o_files link_pkgs
376 MkDLL -> doMkDLL dflags o_files link_pkgs
378 -- Always link in the haskell98 package for static linking. Other
379 -- packages have to be specified via the -package flag.
380 link_pkgs = [haskell98PackageId]
383 -- ---------------------------------------------------------------------------
384 -- Run a compilation pipeline, consisting of multiple phases.
386 -- This is the interface to the compilation pipeline, which runs
387 -- a series of compilation steps on a single source file, specifying
388 -- at which stage to stop.
390 -- The DynFlags can be modified by phases in the pipeline (eg. by
391 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
396 -- output should be to a temporary file: we're going to
397 -- run more compilation steps on this output later
399 -- we want a persistent file, i.e. a file in the current directory
400 -- derived from the input filename, but with the appropriate extension.
401 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
402 | SpecificFile FilePath
403 -- the output must go into the specified file.
406 :: Phase -- When to stop
407 -> DynFlags -- Dynamic flags
408 -> (FilePath,Maybe Phase) -- Input filename (and maybe -x suffix)
409 -> PipelineOutput -- Output filename
410 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
411 -> IO (DynFlags, FilePath) -- (final flags, output filename)
413 runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc
415 let (basename, suffix) = splitFilename input_fn
417 -- If we were given a -x flag, then use that phase to start from
419 | Just x_phase <- mb_phase = x_phase
420 | otherwise = startPhase suffix
422 -- We want to catch cases of "you can't get there from here" before
423 -- we start the pipeline, because otherwise it will just run off the
426 -- There is a partial ordering on phases, where A < B iff A occurs
427 -- before B in a normal compilation pipeline.
429 when (not (start_phase `happensBefore` stop_phase)) $
431 ("cannot compile this file to desired target: "
434 -- this is a function which will be used to calculate output file names
435 -- as we go along (we partially apply it to some of its inputs here)
436 let get_output_fn = getOutputFilename stop_phase output basename
438 -- Execute the pipeline...
439 (dflags', output_fn, maybe_loc) <-
440 pipeLoop dflags start_phase stop_phase input_fn
441 basename suffix get_output_fn maybe_loc
443 -- Sometimes, a compilation phase doesn't actually generate any output
444 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
445 -- stage, but we wanted to keep the output, then we have to explicitly
449 return (dflags', output_fn)
451 do final_fn <- get_output_fn dflags' stop_phase maybe_loc
452 when (final_fn /= output_fn) $
453 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
454 ++ "'") output_fn final_fn
455 return (dflags', final_fn)
459 pipeLoop :: DynFlags -> Phase -> Phase
460 -> FilePath -> String -> Suffix
461 -> (DynFlags -> Phase -> Maybe ModLocation -> IO FilePath)
463 -> IO (DynFlags, FilePath, Maybe ModLocation)
465 pipeLoop dflags phase stop_phase
466 input_fn orig_basename orig_suff
467 orig_get_output_fn maybe_loc
469 | phase `eqPhase` stop_phase -- All done
470 = return (dflags, input_fn, maybe_loc)
472 | not (phase `happensBefore` stop_phase)
473 -- Something has gone wrong. We'll try to cover all the cases when
474 -- this could happen, so if we reach here it is a panic.
475 -- eg. it might happen if the -C flag is used on a source file that
476 -- has {-# OPTIONS -fasm #-}.
477 = panic ("pipeLoop: at phase " ++ show phase ++
478 " but I wanted to stop at phase " ++ show stop_phase)
481 = do { (next_phase, dflags', maybe_loc, output_fn)
482 <- runPhase phase stop_phase dflags orig_basename
483 orig_suff input_fn orig_get_output_fn maybe_loc
484 ; pipeLoop dflags' next_phase stop_phase output_fn
485 orig_basename orig_suff orig_get_output_fn maybe_loc }
488 :: Phase -> PipelineOutput -> String
489 -> DynFlags -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
490 getOutputFilename stop_phase output basename
493 func dflags next_phase maybe_location
494 | is_last_phase, Persistent <- output = persistent_fn
495 | is_last_phase, SpecificFile f <- output = return f
496 | keep_this_output = persistent_fn
497 | otherwise = newTempName dflags suffix
500 odir = objectDir dflags
501 osuf = objectSuf dflags
502 keep_hc = dopt Opt_KeepHcFiles dflags
503 keep_raw_s = dopt Opt_KeepRawSFiles dflags
504 keep_s = dopt Opt_KeepSFiles dflags
506 myPhaseInputExt HCc = hcsuf
507 myPhaseInputExt StopLn = osuf
508 myPhaseInputExt other = phaseInputExt other
510 is_last_phase = next_phase `eqPhase` stop_phase
512 -- sometimes, we keep output from intermediate stages
516 Mangle | keep_raw_s -> True
518 HCc | keep_hc -> True
521 suffix = myPhaseInputExt next_phase
523 -- persistent object files get put in odir
525 | StopLn <- next_phase = return odir_persistent
526 | otherwise = return persistent
528 persistent = basename `joinFileExt` suffix
531 | Just loc <- maybe_location = ml_obj_file loc
532 | Just d <- odir = d `joinFileName` persistent
533 | otherwise = persistent
536 -- -----------------------------------------------------------------------------
537 -- Each phase in the pipeline returns the next phase to execute, and the
538 -- name of the file in which the output was placed.
540 -- We must do things dynamically this way, because we often don't know
541 -- what the rest of the phases will be until part-way through the
542 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
543 -- of a source file can change the latter stages of the pipeline from
544 -- taking the via-C route to using the native code generator.
546 runPhase :: Phase -- Do this phase first
547 -> Phase -- Stop just before this phase
549 -> String -- basename of original input source
550 -> String -- its extension
551 -> FilePath -- name of file which contains the input to this phase.
552 -> (DynFlags -> Phase -> Maybe ModLocation -> IO FilePath)
553 -- how to calculate the output filename
554 -> Maybe ModLocation -- the ModLocation, if we have one
555 -> IO (Phase, -- next phase
556 DynFlags, -- new dynamic flags
557 Maybe ModLocation, -- the ModLocation, if we have one
558 FilePath) -- output filename
560 -- Invariant: the output filename always contains the output
561 -- Interesting case: Hsc when there is no recompilation to do
562 -- Then the output filename is still a .o file
564 -------------------------------------------------------------------------------
567 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
568 = do let unlit_flags = getOpts dflags opt_L
569 -- The -h option passes the file name for unlit to put in a #line directive
570 output_fn <- get_output_fn dflags (Cpp sf) maybe_loc
572 SysTools.runUnlit dflags
573 (map SysTools.Option unlit_flags ++
574 [ SysTools.Option "-h"
575 , SysTools.Option input_fn
576 , SysTools.FileOption "" input_fn
577 , SysTools.FileOption "" output_fn
580 return (Cpp sf, dflags, maybe_loc, output_fn)
582 -------------------------------------------------------------------------------
583 -- Cpp phase : (a) gets OPTIONS out of file
584 -- (b) runs cpp if necessary
586 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
587 = do src_opts <- getOptionsFromFile input_fn
588 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 (map unLoc src_opts)
589 checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff)
591 if not (dopt Opt_Cpp dflags) then
592 -- no need to preprocess CPP, just pass input file along
593 -- to the next phase of the pipeline.
594 return (HsPp sf, dflags, maybe_loc, input_fn)
596 output_fn <- get_output_fn dflags (HsPp sf) maybe_loc
597 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
598 return (HsPp sf, dflags, maybe_loc, output_fn)
600 -------------------------------------------------------------------------------
603 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
604 = do if not (dopt Opt_Pp dflags) then
605 -- no need to preprocess, just pass input file along
606 -- to the next phase of the pipeline.
607 return (Hsc sf, dflags, maybe_loc, input_fn)
609 let hspp_opts = getOpts dflags opt_F
610 let orig_fn = basename `joinFileExt` suff
611 output_fn <- get_output_fn dflags (Hsc sf) maybe_loc
612 SysTools.runPp dflags
613 ( [ SysTools.Option orig_fn
614 , SysTools.Option input_fn
615 , SysTools.FileOption "" output_fn
617 map SysTools.Option hspp_opts
619 return (Hsc sf, dflags, maybe_loc, output_fn)
621 -----------------------------------------------------------------------------
624 -- Compilation of a single module, in "legacy" mode (_not_ under
625 -- the direction of the compilation manager).
626 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
627 = do -- normal Hsc mode, not mkdependHS
629 -- we add the current directory (i.e. the directory in which
630 -- the .hs files resides) to the import path, since this is
631 -- what gcc does, and it's probably what you want.
632 let current_dir = directoryOf basename
634 paths = includePaths dflags0
635 dflags = dflags0 { includePaths = current_dir : paths }
637 -- gather the imports and module name
638 (hspp_buf,mod_name) <-
640 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
641 ; m <- getCoreModuleName input_fn
642 ; return (Nothing, mkModuleName m) }
644 other -> do { buf <- hGetStringBuffer input_fn
645 ; (_,_,L _ mod_name) <- getImports dflags buf input_fn
646 ; return (Just buf, mod_name) }
648 -- Build a ModLocation to pass to hscMain.
649 -- The source filename is rather irrelevant by now, but it's used
650 -- by hscMain for messages. hscMain also needs
651 -- the .hi and .o filenames, and this is as good a way
652 -- as any to generate them, and better than most. (e.g. takes
653 -- into accout the -osuf flags)
654 location1 <- mkHomeModLocation2 dflags mod_name basename suff
656 -- Boot-ify it if necessary
657 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
658 | otherwise = location1
661 -- Take -ohi into account if present
662 -- This can't be done in mkHomeModuleLocation because
663 -- it only applies to the module being compiles
664 let ohi = outputHi dflags
665 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
666 | otherwise = location2
668 -- Take -o into account if present
669 -- Very like -ohi, but we must *only* do this if we aren't linking
670 -- (If we're linking then the -o applies to the linked thing, not to
671 -- the object file for one module.)
672 -- Note the nasty duplication with the same computation in compileFile above
673 let expl_o_file = outputFile dflags
674 location4 | Just ofile <- expl_o_file
675 , isNoLink (ghcLink dflags)
676 = location3 { ml_obj_file = ofile }
677 | otherwise = location3
679 o_file = ml_obj_file location4 -- The real object file
682 -- Figure out if the source has changed, for recompilation avoidance.
684 -- Setting source_unchanged to True means that M.o seems
685 -- to be up to date wrt M.hs; so no need to recompile unless imports have
686 -- changed (which the compiler itself figures out).
687 -- Setting source_unchanged to False tells the compiler that M.o is out of
688 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
689 src_timestamp <- getModificationTime (basename `joinFileExt` suff)
691 let do_recomp = dopt Opt_RecompChecking dflags
693 if not do_recomp || not (isStopLn stop)
694 -- Set source_unchanged to False unconditionally if
695 -- (a) recompilation checker is off, or
696 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
698 -- Otherwise look at file modification dates
699 else do o_file_exists <- doesFileExist o_file
701 then return False -- Need to recompile
702 else do t2 <- getModificationTime o_file
703 if t2 > src_timestamp
708 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
709 let next_phase = hscNextPhase dflags src_flavour hsc_lang
710 output_fn <- get_output_fn dflags next_phase (Just location4)
712 let dflags' = dflags { hscTarget = hsc_lang,
713 hscOutName = output_fn,
714 extCoreName = basename ++ ".hcr" }
716 hsc_env <- newHscEnv dflags'
718 -- Tell the finder cache about this module
719 mod <- addHomeModuleToFinder hsc_env mod_name location4
721 -- Make the ModSummary to hand to hscMain
723 unused_field = panic "runPhase:ModSummary field"
724 -- Some fields are not looked at by hscMain
725 mod_summary = ModSummary { ms_mod = mod,
726 ms_hsc_src = src_flavour,
727 ms_hspp_file = input_fn,
728 ms_hspp_opts = dflags,
729 ms_hspp_buf = hspp_buf,
730 ms_location = location4,
731 ms_hs_date = src_timestamp,
732 ms_obj_date = Nothing,
733 ms_imps = unused_field,
734 ms_srcimps = unused_field }
737 mbResult <- hscCompileOneShot hsc_env
738 mod_summary source_unchanged
740 Nothing -- No "module i of n" progress info
743 Nothing -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
745 -> do SysTools.touch dflags' "Touching object file" o_file
746 -- The .o file must have a later modification date
747 -- than the source file (else we wouldn't be in HscNoRecomp)
748 -- but we touch it anyway, to keep 'make' happy (we think).
749 return (StopLn, dflags', Just location4, o_file)
750 Just (HscRecomp hasStub)
752 do stub_o <- compileStub dflags' mod location4
753 consIORef v_Ld_inputs stub_o
754 -- In the case of hs-boot files, generate a dummy .o-boot
755 -- stamp file for the benefit of Make
756 when (isHsBoot src_flavour) $
757 SysTools.touch dflags' "Touching object file" o_file
758 return (next_phase, dflags', Just location4, output_fn)
760 -----------------------------------------------------------------------------
763 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
765 output_fn <- get_output_fn dflags Cmm maybe_loc
766 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
767 return (Cmm, dflags, maybe_loc, output_fn)
769 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
771 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
772 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
773 output_fn <- get_output_fn dflags next_phase maybe_loc
775 let dflags' = dflags { hscTarget = hsc_lang,
776 hscOutName = output_fn,
777 extCoreName = basename ++ ".hcr" }
779 ok <- hscCmmFile dflags' input_fn
781 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
783 return (next_phase, dflags, maybe_loc, output_fn)
785 -----------------------------------------------------------------------------
788 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
789 -- way too many hacks, and I can't say I've ever used it anyway.
791 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
792 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
793 = do let cc_opts = getOpts dflags opt_c
794 hcc = cc_phase `eqPhase` HCc
796 let cmdline_include_paths = includePaths dflags
798 -- HC files have the dependent packages stamped into them
799 pkgs <- if hcc then getHCFilePackages input_fn else return []
801 -- add package include paths even if we're just compiling .c
802 -- files; this is the Value Add(TM) that using ghc instead of
804 pkg_include_dirs <- getPackageIncludePath dflags pkgs
805 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
806 (cmdline_include_paths ++ pkg_include_dirs)
808 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
809 let pic_c_flags = picCCOpts dflags
811 let verb = getVerbFlag dflags
813 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
815 let split_objs = dopt Opt_SplitObjs dflags
816 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
819 let excessPrecision = dopt Opt_ExcessPrecision dflags
821 let cc_opt | optLevel dflags >= 2 = "-O2"
826 let mangle = dopt Opt_DoAsmMangling dflags
828 | hcc && mangle = Mangle
830 output_fn <- get_output_fn dflags next_phase maybe_loc
835 -- on x86 the floating point regs have greater precision
836 -- than a double, which leads to unpredictable results.
837 -- By default, we turn this off with -ffloat-store unless
838 -- the user specified -fexcess-precision.
839 (if excessPrecision then [] else [ "-ffloat-store" ]) ++
841 -- gcc's -fstrict-aliasing allows two accesses to memory
842 -- to be considered non-aliasing if they have different types.
843 -- This interacts badly with the C code we generate, which is
844 -- very weakly typed, being derived from C--.
845 ["-fno-strict-aliasing"]
849 SysTools.runCc dflags (
850 -- force the C compiler to interpret this file as C when
851 -- compiling .hc files, by adding the -x c option.
852 -- Also useful for plain .c files, just in case GHC saw a
854 [ SysTools.Option "-x", SysTools.Option "c"] ++
855 [ SysTools.FileOption "" input_fn
856 , SysTools.Option "-o"
857 , SysTools.FileOption "" output_fn
859 ++ map SysTools.Option (
862 #ifdef sparc_TARGET_ARCH
863 -- We only support SparcV9 and better because V8 lacks an atomic CAS
864 -- instruction. Note that the user can still override this
865 -- (e.g., -mcpu=ultrasparc) as GCC picks the "best" -mcpu flag
866 -- regardless of the ordering.
868 -- This is a temporary hack.
877 ++ [ verb, "-S", "-Wimplicit", cc_opt ]
878 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
885 return (next_phase, dflags, maybe_loc, output_fn)
887 -- ToDo: postprocess the output from gcc
889 -----------------------------------------------------------------------------
892 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
893 = do let mangler_opts = getOpts dflags opt_m
896 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
898 machdep_opts <- return []
901 let split = dopt Opt_SplitObjs dflags
903 | split = SplitMangle
905 output_fn <- get_output_fn dflags next_phase maybe_loc
907 SysTools.runMangle dflags (map SysTools.Option mangler_opts
908 ++ [ SysTools.FileOption "" input_fn
909 , SysTools.FileOption "" output_fn
911 ++ map SysTools.Option machdep_opts)
913 return (next_phase, dflags, maybe_loc, output_fn)
915 -----------------------------------------------------------------------------
918 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
919 = do -- tmp_pfx is the prefix used for the split .s files
920 -- We also use it as the file to contain the no. of split .s files (sigh)
921 split_s_prefix <- SysTools.newTempName dflags "split"
922 let n_files_fn = split_s_prefix
924 SysTools.runSplit dflags
925 [ SysTools.FileOption "" input_fn
926 , SysTools.FileOption "" split_s_prefix
927 , SysTools.FileOption "" n_files_fn
930 -- Save the number of split files for future references
931 s <- readFile n_files_fn
932 let n_files = read s :: Int
933 writeIORef v_Split_info (split_s_prefix, n_files)
935 -- Remember to delete all these files
936 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
939 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
940 -- we don't use the filename
942 -----------------------------------------------------------------------------
945 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
946 = do let as_opts = getOpts dflags opt_a
947 let cmdline_include_paths = includePaths dflags
949 output_fn <- get_output_fn dflags StopLn maybe_loc
951 -- we create directories for the object file, because it
952 -- might be a hierarchical module.
953 createDirectoryHierarchy (directoryOf output_fn)
955 SysTools.runAs dflags
956 (map SysTools.Option as_opts
957 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
958 #ifdef sparc_TARGET_ARCH
959 -- We only support SparcV9 and better because V8 lacks an atomic CAS
960 -- instruction so we have to make sure that the assembler accepts the
961 -- instruction set. Note that the user can still override this
962 -- (e.g., -mcpu=ultrasparc). GCC picks the "best" -mcpu flag
963 -- regardless of the ordering.
965 -- This is a temporary hack.
966 ++ [ SysTools.Option "-mcpu=v9" ]
968 ++ [ SysTools.Option "-c"
969 , SysTools.FileOption "" input_fn
970 , SysTools.Option "-o"
971 , SysTools.FileOption "" output_fn
974 return (StopLn, dflags, maybe_loc, output_fn)
977 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
979 output_fn <- get_output_fn dflags StopLn maybe_loc
981 let (base_o, _) = splitFilename output_fn
982 split_odir = base_o ++ "_split"
983 osuf = objectSuf dflags
985 createDirectoryHierarchy split_odir
987 -- remove M_split/ *.o, because we're going to archive M_split/ *.o
988 -- later and we don't want to pick up any old objects.
989 fs <- getDirectoryContents split_odir
990 mapM_ removeFile $ map (split_odir `joinFileName`)
991 $ filter (osuf `isSuffixOf`) fs
993 let as_opts = getOpts dflags opt_a
995 (split_s_prefix, n) <- readIORef v_Split_info
997 let split_s n = split_s_prefix ++ "__" ++ show n `joinFileExt` "s"
998 split_obj n = split_odir `joinFileName`
999 filenameOf base_o ++ "__" ++ show n
1003 = SysTools.runAs dflags
1004 (map SysTools.Option as_opts ++
1005 [ SysTools.Option "-c"
1006 , SysTools.Option "-o"
1007 , SysTools.FileOption "" (split_obj n)
1008 , SysTools.FileOption "" (split_s n)
1011 mapM_ assemble_file [1..n]
1013 -- and join the split objects into a single object file:
1014 let ld_r args = SysTools.runLink dflags ([
1015 SysTools.Option "-nostdlib",
1016 SysTools.Option "-nodefaultlibs",
1017 SysTools.Option "-Wl,-r",
1018 SysTools.Option ld_x_flag,
1019 SysTools.Option "-o",
1020 SysTools.FileOption "" output_fn ] ++ args)
1021 ld_x_flag | null cLD_X = ""
1022 | otherwise = "-Wl,-x"
1024 if cLdIsGNULd == "YES"
1026 let script = split_odir `joinFileName` "ld.script"
1028 "INPUT(" ++ unwords (map split_obj [1..n]) ++ ")"
1029 ld_r [SysTools.FileOption "" script]
1031 ld_r (map (SysTools.FileOption "" . split_obj) [1..n])
1033 return (StopLn, dflags, maybe_loc, output_fn)
1036 -----------------------------------------------------------------------------
1037 -- MoveBinary sort-of-phase
1038 -- After having produced a binary, move it somewhere else and generate a
1039 -- wrapper script calling the binary. Currently, we need this only in
1040 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
1041 -- central directory.
1042 -- This is called from staticLink below, after linking. I haven't made it
1043 -- a separate phase to minimise interfering with other modules, and
1044 -- we don't need the generality of a phase (MoveBinary is always
1045 -- done after linking and makes only sense in a parallel setup) -- HWL
1047 runPhase_MoveBinary dflags input_fn
1049 let sysMan = pgm_sysman dflags
1050 pvm_root <- getEnv "PVM_ROOT"
1051 pvm_arch <- getEnv "PVM_ARCH"
1053 pvm_executable_base = "=" ++ input_fn
1054 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
1055 -- nuke old binary; maybe use configur'ed names for cp and rm?
1056 system ("rm -f " ++ pvm_executable)
1057 -- move the newly created binary into PVM land
1058 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
1059 -- generate a wrapper script for running a parallel prg under PVM
1060 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
1063 -- generates a Perl skript starting a parallel prg under PVM
1064 mk_pvm_wrapper_script :: String -> String -> String -> String
1065 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
1067 "eval 'exec perl -S $0 ${1+\"$@\"}'",
1068 " if $running_under_some_shell;",
1069 "# =!=!=!=!=!=!=!=!=!=!=!",
1070 "# This script is automatically generated: DO NOT EDIT!!!",
1071 "# Generated by Glasgow Haskell Compiler",
1072 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
1074 "$pvm_executable = '" ++ pvm_executable ++ "';",
1075 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
1076 "$SysMan = '" ++ sysMan ++ "';",
1078 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
1079 "# first, some magical shortcuts to run "commands" on the binary",
1080 "# (which is hidden)",
1081 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1082 " local($cmd) = $1;",
1083 " system("$cmd $pvm_executable");",
1084 " exit(0); # all done",
1087 "# Now, run the real binary; process the args first",
1088 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1090 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1091 "@nonPVM_args = ();",
1092 "$in_RTS_args = 0;",
1094 "args: while ($a = shift(@ARGV)) {",
1095 " if ( $a eq '+RTS' ) {",
1096 " $in_RTS_args = 1;",
1097 " } elsif ( $a eq '-RTS' ) {",
1098 " $in_RTS_args = 0;",
1100 " if ( $a eq '-d' && $in_RTS_args ) {",
1102 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1103 " $nprocessors = $1;",
1104 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1105 " $nprocessors = $1;",
1107 " push(@nonPVM_args, $a);",
1111 "local($return_val) = 0;",
1112 "# Start the parallel execution by calling SysMan",
1113 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1114 "$return_val = $?;",
1115 "# ToDo: fix race condition moving files and flushing them!!",
1116 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1117 "exit($return_val);"
1120 -----------------------------------------------------------------------------
1121 -- Complain about non-dynamic flags in OPTIONS pragmas
1123 checkProcessArgsResult flags filename
1124 = do when (notNull flags) (throwDyn (ProgramError (
1125 showSDoc (hang (text filename <> char ':')
1126 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1127 hsep (map text flags)))
1130 -----------------------------------------------------------------------------
1131 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1133 getHCFilePackages :: FilePath -> IO [PackageId]
1134 getHCFilePackages filename =
1135 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1138 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1139 return (map stringToPackageId (words rest))
1143 -----------------------------------------------------------------------------
1144 -- Static linking, of .o files
1146 -- The list of packages passed to link is the list of packages on
1147 -- which this program depends, as discovered by the compilation
1148 -- manager. It is combined with the list of packages that the user
1149 -- specifies on the command line with -package flags.
1151 -- In one-shot linking mode, we can't discover the package
1152 -- dependencies (because we haven't actually done any compilation or
1153 -- read any interface files), so the user must explicitly specify all
1156 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1157 staticLink dflags o_files dep_packages = do
1158 let verb = getVerbFlag dflags
1159 output_fn = exeFileName dflags
1161 -- get the full list of packages to link with, by combining the
1162 -- explicit packages with the auto packages and all of their
1163 -- dependencies, and eliminating duplicates.
1165 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1166 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1168 let lib_paths = libraryPaths dflags
1169 let lib_path_opts = map ("-L"++) lib_paths
1171 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1173 #ifdef darwin_TARGET_OS
1174 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1175 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1177 let framework_paths = frameworkPaths dflags
1178 framework_path_opts = map ("-F"++) framework_paths
1180 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1181 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1183 let frameworks = cmdlineFrameworks dflags
1184 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1185 -- reverse because they're added in reverse order from the cmd line
1188 -- probably _stub.o files
1189 extra_ld_inputs <- readIORef v_Ld_inputs
1191 -- opts from -optl-<blah> (including -l<blah> options)
1192 let extra_ld_opts = getOpts dflags opt_l
1194 let ways = wayNames dflags
1196 -- Here are some libs that need to be linked at the *end* of
1197 -- the command line, because they contain symbols that are referred to
1198 -- by the RTS. We can't therefore use the ordinary way opts for these.
1200 debug_opts | WayDebug `elem` ways = [
1201 #if defined(HAVE_LIBBFD)
1208 thread_opts | WayThreaded `elem` ways = [
1209 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1212 #if defined(osf3_TARGET_OS)
1218 let (md_c_flags, _) = machdepCCOpts dflags
1219 SysTools.runLink dflags (
1220 [ SysTools.Option verb
1221 , SysTools.Option "-o"
1222 , SysTools.FileOption "" output_fn
1224 ++ map SysTools.Option (
1230 #ifdef darwin_TARGET_OS
1231 ++ framework_path_opts
1234 ++ pkg_lib_path_opts
1236 #ifdef darwin_TARGET_OS
1237 ++ pkg_framework_path_opts
1238 ++ pkg_framework_opts
1244 -- parallel only: move binary to another dir -- HWL
1245 when (WayPar `elem` ways)
1246 (do success <- runPhase_MoveBinary dflags output_fn
1247 if success then return ()
1248 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1251 exeFileName :: DynFlags -> FilePath
1253 | Just s <- outputFile dflags =
1254 #if defined(mingw32_HOST_OS)
1255 if null (suffixOf s)
1256 then s `joinFileExt` "exe"
1262 #if defined(mingw32_HOST_OS)
1268 -----------------------------------------------------------------------------
1269 -- Making a DLL (only for Win32)
1271 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1272 doMkDLL dflags o_files dep_packages = do
1273 let verb = getVerbFlag dflags
1274 let static = opt_Static
1275 let no_hs_main = dopt Opt_NoHsMain dflags
1276 let o_file = outputFile dflags
1277 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1279 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1280 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1282 let lib_paths = libraryPaths dflags
1283 let lib_path_opts = map ("-L"++) lib_paths
1285 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1287 -- probably _stub.o files
1288 extra_ld_inputs <- readIORef v_Ld_inputs
1290 -- opts from -optdll-<blah>
1291 let extra_ld_opts = getOpts dflags opt_dll
1293 let pstate = pkgState dflags
1294 rts_pkg = getPackageDetails pstate rtsPackageId
1295 base_pkg = getPackageDetails pstate basePackageId
1297 let extra_os = if static || no_hs_main
1299 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1300 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1302 let (md_c_flags, _) = machdepCCOpts dflags
1303 SysTools.runMkDLL dflags
1304 ([ SysTools.Option verb
1305 , SysTools.Option "-o"
1306 , SysTools.FileOption "" output_fn
1308 ++ map SysTools.Option (
1312 ++ [ "--target=i386-mingw32" ]
1316 ++ pkg_lib_path_opts
1318 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1320 else [ "--export-all" ])
1323 -- -----------------------------------------------------------------------------
1326 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1327 doCpp dflags raw include_cc_opts input_fn output_fn = do
1328 let hscpp_opts = getOpts dflags opt_P
1329 let cmdline_include_paths = includePaths dflags
1331 pkg_include_dirs <- getPackageIncludePath dflags []
1332 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1333 (cmdline_include_paths ++ pkg_include_dirs)
1335 let verb = getVerbFlag dflags
1338 | not include_cc_opts = []
1339 | otherwise = (optc ++ md_c_flags)
1341 optc = getOpts dflags opt_c
1342 (md_c_flags, _) = machdepCCOpts dflags
1344 let cpp_prog args | raw = SysTools.runCpp dflags args
1345 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1348 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1349 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1350 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1351 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1352 -- remember, in code we *compile*, the HOST is the same our TARGET,
1353 -- and BUILD is the same as our HOST.
1355 cpp_prog ([SysTools.Option verb]
1356 ++ map SysTools.Option include_paths
1357 ++ map SysTools.Option hsSourceCppOpts
1358 ++ map SysTools.Option hscpp_opts
1359 ++ map SysTools.Option cc_opts
1360 ++ map SysTools.Option target_defs
1361 ++ [ SysTools.Option "-x"
1362 , SysTools.Option "c"
1363 , SysTools.Option input_fn
1364 -- We hackily use Option instead of FileOption here, so that the file
1365 -- name is not back-slashed on Windows. cpp is capable of
1366 -- dealing with / in filenames, so it works fine. Furthermore
1367 -- if we put in backslashes, cpp outputs #line directives
1368 -- with *double* backslashes. And that in turn means that
1369 -- our error messages get double backslashes in them.
1370 -- In due course we should arrange that the lexer deals
1371 -- with these \\ escapes properly.
1372 , SysTools.Option "-o"
1373 , SysTools.FileOption "" output_fn
1376 cHaskell1Version = "5" -- i.e., Haskell 98
1378 -- Default CPP defines in Haskell source
1380 [ "-D__HASKELL1__="++cHaskell1Version
1381 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1383 , "-D__CONCURRENT_HASKELL__"
1387 -- -----------------------------------------------------------------------------
1390 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1391 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1392 hscNextPhase dflags other hsc_lang =
1395 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1397 HscNothing -> StopLn
1398 HscInterpreted -> StopLn
1402 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1403 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1404 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1405 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1408 keep_hc = dopt Opt_KeepHcFiles dflags
1410 -- don't change the lang if we're interpreting
1411 | current_hsc_lang == HscInterpreted = current_hsc_lang
1413 -- force -fvia-C if we are being asked for a .hc file
1414 | HCc <- stop = HscC
1416 -- otherwise, stick to the plan
1417 | otherwise = current_hsc_lang
1419 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1420 -- The split prefix and number of files