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 )
59 import DATA_IOREF ( readIORef, writeIORef, IORef )
60 import GLAEXTS ( Int(..) )
69 -- ---------------------------------------------------------------------------
72 -- Just preprocess a file, put the result in a temp. file (used by the
73 -- compilation manager during the summary phase).
75 -- We return the augmented DynFlags, because they contain the result
76 -- of slurping in the OPTIONS pragmas
78 preprocess :: DynFlags -> FilePath -> IO (DynFlags, FilePath)
79 preprocess dflags filename =
80 ASSERT2(isHaskellSrcFilename filename, text filename)
81 runPipeline anyHsc dflags filename Temporary Nothing{-no ModLocation-}
83 -- ---------------------------------------------------------------------------
86 -- Compile a single module, under the control of the compilation manager.
88 -- This is the interface between the compilation manager and the
89 -- compiler proper (hsc), where we deal with tedious details like
90 -- reading the OPTIONS pragma from the source file, and passing the
91 -- output of hsc through the C compiler.
93 -- NB. No old interface can also mean that the source has changed.
96 -> (Messages -> IO ()) -- error message callback
98 -> Maybe Linkable -- Just linkable <=> source unchanged
99 -> Maybe ModIface -- Old interface, if available
104 = CompOK ModDetails -- New details
105 ModIface -- New iface
106 (Maybe Linkable) -- a Maybe, for the same reasons as hm_linkable
111 compile hsc_env msg_act mod_summary maybe_old_linkable old_iface mod_index nmods = do
113 let dflags0 = hsc_dflags hsc_env
114 this_mod = ms_mod mod_summary
115 src_flavour = ms_hsc_src mod_summary
118 | Just l <- maybe_old_linkable, isObjectLinkable l = True
121 showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary)
123 let location = ms_location mod_summary
124 let input_fn = expectJust "compile:hs" (ml_hs_file location)
125 let input_fnpp = expectJust "compile:hspp" (ms_hspp_file mod_summary)
127 debugTraceMsg dflags0 2 ("compile: input file " ++ input_fnpp)
129 -- Add in the OPTIONS from the source file
130 -- This is nasty: we've done this once already, in the compilation manager
131 -- It might be better to cache the flags in the ml_hspp_file field,say
132 let hspp_buf = expectJust "compile:hspp_buf" (ms_hspp_buf mod_summary)
133 opts = getOptionsFromStringBuffer hspp_buf
134 (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 (map snd opts)
135 if (not (null unhandled_flags))
136 then do msg_act (optionsErrorMsgs unhandled_flags opts input_fn)
140 let (basename, _) = splitFilename input_fn
142 -- We add the directory in which the .hs files resides) to the import path.
143 -- This is needed when we try to compile the .hc file later, if it
144 -- imports a _stub.h file that we created here.
145 let current_dir = directoryOf basename
146 old_paths = includePaths dflags1
147 dflags = dflags1 { includePaths = current_dir : old_paths }
149 -- Figure out what lang we're generating
150 let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags)
151 -- ... and what the next phase should be
152 let next_phase = hscNextPhase dflags src_flavour hsc_lang
153 -- ... and what file to generate the output into
154 output_fn <- getOutputFilename dflags next_phase
155 Temporary basename next_phase (Just location)
157 let dflags' = dflags { hscTarget = hsc_lang,
158 hscOutName = output_fn,
159 hscStubCOutName = basename ++ "_stub.c",
160 hscStubHOutName = basename ++ "_stub.h",
161 extCoreName = basename ++ ".hcr" }
163 -- -no-recomp should also work with --make
164 let do_recomp = dopt Opt_RecompChecking dflags
165 source_unchanged = isJust maybe_old_linkable && do_recomp
166 hsc_env' = hsc_env { hsc_dflags = dflags' }
167 object_filename = ml_obj_file location
170 hsc_result <- hscMain hsc_env' msg_act mod_summary
171 source_unchanged have_object old_iface
172 (Just (mod_index, nmods))
175 HscFail -> return CompErrs
177 HscNoRecomp details iface ->
178 ASSERT(isJust maybe_old_linkable)
179 return (CompOK details iface maybe_old_linkable)
181 HscRecomp details iface stub_h_exists stub_c_exists maybe_interpreted_code
183 | isHsBoot src_flavour -- No further compilation to do
184 -> do case hsc_lang of
185 HscInterpreted -> return ()
186 _other -> SysTools.touch dflags' "Touching object file"
188 return (CompOK details iface Nothing)
190 | otherwise -- Normal source file
192 maybe_stub_o <- compileStub dflags' stub_c_exists
193 let stub_unlinked = case maybe_stub_o of
195 Just stub_o -> [ DotO stub_o ]
197 (hs_unlinked, unlinked_time) <-
200 -- in interpreted mode, just return the compiled code
201 -- as our "unlinked" object.
203 -> case maybe_interpreted_code of
205 Just comp_bc -> return ([BCOs comp_bc], ms_hs_date mod_summary)
206 -- Why do we use the timestamp of the source file here,
207 -- rather than the current time? This works better in
208 -- the case where the local clock is out of sync
209 -- with the filesystem's clock. It's just as accurate:
210 -- if the source is modified, then the linkable will
213 Nothing -> panic "compile: no interpreted code"
215 -- We're in --make mode: finish the compilation pipeline.
217 -> do runPipeline StopLn dflags output_fn Persistent
219 -- The object filename comes from the ModLocation
221 o_time <- getModificationTime object_filename
222 return ([DotO object_filename], o_time)
224 let linkable = LM unlinked_time this_mod
225 (hs_unlinked ++ stub_unlinked)
227 return (CompOK details iface (Just linkable))
229 -----------------------------------------------------------------------------
230 -- stub .h and .c files (for foreign export support)
232 compileStub dflags stub_c_exists
233 | not stub_c_exists = return Nothing
235 -- compile the _stub.c file w/ gcc
236 let stub_c = hscStubCOutName dflags
237 (_, stub_o) <- runPipeline StopLn dflags
238 stub_c Persistent Nothing{-no ModLocation-}
242 -- ---------------------------------------------------------------------------
245 link :: GhcMode -- interactive or batch
246 -> DynFlags -- dynamic flags
247 -> Bool -- attempt linking in batch mode?
248 -> HomePackageTable -- what to link
251 -- For the moment, in the batch linker, we don't bother to tell doLink
252 -- which packages to link -- it just tries all that are available.
253 -- batch_attempt_linking should only be *looked at* in batch mode. It
254 -- should only be True if the upsweep was successful and someone
255 -- exports main, i.e., we have good reason to believe that linking
259 link Interactive dflags batch_attempt_linking hpt
260 = do -- Not Linking...(demand linker will do the job)
264 link JustTypecheck dflags batch_attempt_linking hpt
267 link BatchCompile dflags batch_attempt_linking hpt
268 | batch_attempt_linking
271 home_mod_infos = moduleEnvElts hpt
273 -- the packages we depend on
274 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
276 -- the linkables to link
277 linkables = map (fromJust.hm_linkable) home_mod_infos
279 debugTraceMsg dflags 3 "link: linkables are ..."
280 debugTraceMsg dflags 3 (showSDoc (vcat (map ppr linkables)))
282 -- check for the -no-link flag
283 if isNoLink (ghcLink dflags)
284 then do debugTraceMsg dflags 3 "link(batch): linking omitted (-c flag given)."
288 debugTraceMsg dflags 1 "Linking ..."
290 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
291 obj_files = concatMap getOfiles linkables
293 -- Don't showPass in Batch mode; doLink will do that for us.
294 staticLink dflags obj_files pkg_deps
296 debugTraceMsg dflags 3 "link: done"
298 -- staticLink only returns if it succeeds
302 = do debugTraceMsg dflags 3 "link(batch): upsweep (partially) failed OR"
303 debugTraceMsg dflags 3 " Main.main not exported; not linking."
307 -- -----------------------------------------------------------------------------
308 -- Compile files in one-shot mode.
310 oneShot :: DynFlags -> Phase -> [String] -> IO ()
311 oneShot dflags stop_phase srcs = do
312 o_files <- mapM (compileFile dflags stop_phase) srcs
313 doLink dflags stop_phase o_files
315 compileFile :: DynFlags -> Phase -> FilePath -> IO FilePath
316 compileFile dflags stop_phase src = do
317 exists <- doesFileExist src
319 throwDyn (CmdLineError ("does not exist: " ++ src))
322 split = dopt Opt_SplitObjs dflags
323 mb_o_file = outputFile dflags
324 ghc_link = ghcLink dflags -- Set by -c or -no-link
326 -- When linking, the -o argument refers to the linker's output.
327 -- otherwise, we use it as the name for the pipeline's output.
329 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
330 -- -o foo applies to linker
331 | Just o_file <- mb_o_file = SpecificFile o_file
332 -- -o foo applies to the file we are compiling now
333 | otherwise = Persistent
335 stop_phase' = case stop_phase of
336 As | split -> SplitAs
339 (_, out_file) <- runPipeline stop_phase' dflags
340 src output Nothing{-no ModLocation-}
344 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
345 doLink dflags stop_phase o_files
346 | not (isStopLn stop_phase)
347 = return () -- We stopped before the linking phase
350 = case ghcLink dflags of
352 StaticLink -> staticLink dflags o_files link_pkgs
353 MkDLL -> doMkDLL dflags o_files link_pkgs
355 -- Always link in the haskell98 package for static linking. Other
356 -- packages have to be specified via the -package flag.
358 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
362 -- ---------------------------------------------------------------------------
363 -- Run a compilation pipeline, consisting of multiple phases.
365 -- This is the interface to the compilation pipeline, which runs
366 -- a series of compilation steps on a single source file, specifying
367 -- at which stage to stop.
369 -- The DynFlags can be modified by phases in the pipeline (eg. by
370 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
375 -- output should be to a temporary file: we're going to
376 -- run more compilation steps on this output later
378 -- we want a persistent file, i.e. a file in the current directory
379 -- derived from the input filename, but with the appropriate extension.
380 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
381 | SpecificFile FilePath
382 -- the output must go into the specified file.
385 :: Phase -- When to stop
386 -> DynFlags -- Dynamic flags
387 -> FilePath -- Input filename
388 -> PipelineOutput -- Output filename
389 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
390 -> IO (DynFlags, FilePath) -- (final flags, output filename)
392 runPipeline stop_phase dflags input_fn output maybe_loc
394 let (basename, suffix) = splitFilename input_fn
395 start_phase = startPhase suffix
397 -- We want to catch cases of "you can't get there from here" before
398 -- we start the pipeline, because otherwise it will just run off the
401 -- There is a partial ordering on phases, where A < B iff A occurs
402 -- before B in a normal compilation pipeline.
404 when (not (start_phase `happensBefore` stop_phase)) $
406 ("cannot compile this file to desired target: "
409 -- this is a function which will be used to calculate output file names
410 -- as we go along (we partially apply it to some of its inputs here)
411 let get_output_fn = getOutputFilename dflags stop_phase output basename
413 -- Execute the pipeline...
414 (dflags', output_fn, maybe_loc) <-
415 pipeLoop dflags start_phase stop_phase input_fn
416 basename suffix get_output_fn maybe_loc
418 -- Sometimes, a compilation phase doesn't actually generate any output
419 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
420 -- stage, but we wanted to keep the output, then we have to explicitly
424 return (dflags', output_fn)
426 do final_fn <- get_output_fn stop_phase maybe_loc
427 when (final_fn /= output_fn) $
428 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
429 ++ "'") output_fn final_fn
430 return (dflags', final_fn)
434 pipeLoop :: DynFlags -> Phase -> Phase
435 -> FilePath -> String -> Suffix
436 -> (Phase -> Maybe ModLocation -> IO FilePath)
438 -> IO (DynFlags, FilePath, Maybe ModLocation)
440 pipeLoop dflags phase stop_phase
441 input_fn orig_basename orig_suff
442 orig_get_output_fn maybe_loc
444 | phase `eqPhase` stop_phase -- All done
445 = return (dflags, input_fn, maybe_loc)
447 | not (phase `happensBefore` stop_phase)
448 -- Something has gone wrong. We'll try to cover all the cases when
449 -- this could happen, so if we reach here it is a panic.
450 -- eg. it might happen if the -C flag is used on a source file that
451 -- has {-# OPTIONS -fasm #-}.
452 = panic ("pipeLoop: at phase " ++ show phase ++
453 " but I wanted to stop at phase " ++ show stop_phase)
456 = do { (next_phase, dflags', maybe_loc, output_fn)
457 <- runPhase phase stop_phase dflags orig_basename
458 orig_suff input_fn orig_get_output_fn maybe_loc
459 ; pipeLoop dflags' next_phase stop_phase output_fn
460 orig_basename orig_suff orig_get_output_fn maybe_loc }
463 :: DynFlags -> Phase -> PipelineOutput -> String
464 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
465 getOutputFilename dflags stop_phase output basename
469 odir = outputDir dflags
470 osuf = objectSuf dflags
471 keep_hc = dopt Opt_KeepHcFiles dflags
472 keep_raw_s = dopt Opt_KeepRawSFiles dflags
473 keep_s = dopt Opt_KeepSFiles dflags
475 myPhaseInputExt HCc = hcsuf
476 myPhaseInputExt StopLn = osuf
477 myPhaseInputExt other = phaseInputExt other
479 func next_phase maybe_location
480 | is_last_phase, Persistent <- output = persistent_fn
481 | is_last_phase, SpecificFile f <- output = return f
482 | keep_this_output = persistent_fn
483 | otherwise = newTempName dflags suffix
485 is_last_phase = next_phase `eqPhase` stop_phase
487 -- sometimes, we keep output from intermediate stages
491 Mangle | keep_raw_s -> True
493 HCc | keep_hc -> True
496 suffix = myPhaseInputExt next_phase
498 -- persistent object files get put in odir
500 | StopLn <- next_phase = return odir_persistent
501 | otherwise = return persistent
503 persistent = basename ++ '.':suffix
506 | Just loc <- maybe_location = ml_obj_file loc
507 | Just d <- odir = replaceFilenameDirectory persistent d
508 | otherwise = persistent
511 -- -----------------------------------------------------------------------------
512 -- Each phase in the pipeline returns the next phase to execute, and the
513 -- name of the file in which the output was placed.
515 -- We must do things dynamically this way, because we often don't know
516 -- what the rest of the phases will be until part-way through the
517 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
518 -- of a source file can change the latter stages of the pipeline from
519 -- taking the via-C route to using the native code generator.
521 runPhase :: Phase -- Do this phase first
522 -> Phase -- Stop just before this phase
524 -> String -- basename of original input source
525 -> String -- its extension
526 -> FilePath -- name of file which contains the input to this phase.
527 -> (Phase -> Maybe ModLocation -> IO FilePath)
528 -- how to calculate the output filename
529 -> Maybe ModLocation -- the ModLocation, if we have one
530 -> IO (Phase, -- next phase
531 DynFlags, -- new dynamic flags
532 Maybe ModLocation, -- the ModLocation, if we have one
533 FilePath) -- output filename
535 -- Invariant: the output filename always contains the output
536 -- Interesting case: Hsc when there is no recompilation to do
537 -- Then the output filename is still a .o file
539 -------------------------------------------------------------------------------
542 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
543 = do let unlit_flags = getOpts dflags opt_L
544 -- The -h option passes the file name for unlit to put in a #line directive
545 output_fn <- get_output_fn (Cpp sf) maybe_loc
547 SysTools.runUnlit dflags
548 (map SysTools.Option unlit_flags ++
549 [ SysTools.Option "-h"
550 , SysTools.Option input_fn
551 , SysTools.FileOption "" input_fn
552 , SysTools.FileOption "" output_fn
555 return (Cpp sf, dflags, maybe_loc, output_fn)
557 -------------------------------------------------------------------------------
558 -- Cpp phase : (a) gets OPTIONS out of file
559 -- (b) runs cpp if necessary
561 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
562 = do src_opts <- getOptionsFromSource input_fn
563 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
564 checkProcessArgsResult unhandled_flags (basename++'.':suff)
566 if not (dopt Opt_Cpp dflags) then
567 -- no need to preprocess CPP, just pass input file along
568 -- to the next phase of the pipeline.
569 return (HsPp sf, dflags, maybe_loc, input_fn)
571 output_fn <- get_output_fn (HsPp sf) maybe_loc
572 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
573 return (HsPp sf, dflags, maybe_loc, output_fn)
575 -------------------------------------------------------------------------------
578 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
579 = do if not (dopt Opt_Pp dflags) then
580 -- no need to preprocess, just pass input file along
581 -- to the next phase of the pipeline.
582 return (Hsc sf, dflags, maybe_loc, input_fn)
584 let hspp_opts = getOpts dflags opt_F
585 let orig_fn = basename ++ '.':suff
586 output_fn <- get_output_fn (Hsc sf) maybe_loc
587 SysTools.runPp dflags
588 ( [ SysTools.Option orig_fn
589 , SysTools.Option input_fn
590 , SysTools.FileOption "" output_fn
592 map SysTools.Option hspp_opts
594 return (Hsc sf, dflags, maybe_loc, output_fn)
596 -----------------------------------------------------------------------------
599 -- Compilation of a single module, in "legacy" mode (_not_ under
600 -- the direction of the compilation manager).
601 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
602 = do -- normal Hsc mode, not mkdependHS
604 -- we add the current directory (i.e. the directory in which
605 -- the .hs files resides) to the import path, since this is
606 -- what gcc does, and it's probably what you want.
607 let current_dir = directoryOf basename
609 paths = includePaths dflags0
610 dflags = dflags0 { includePaths = current_dir : paths }
612 -- gather the imports and module name
613 (hspp_buf,mod_name) <-
615 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
616 ; m <- getCoreModuleName input_fn
617 ; return (Nothing, mkModule m) }
619 other -> do { buf <- hGetStringBuffer input_fn
620 ; (_,_,mod_name) <- getImports dflags buf input_fn
621 ; return (Just buf, mod_name) }
623 -- Build a ModLocation to pass to hscMain.
624 -- The source filename is rather irrelevant by now, but it's used
625 -- by hscMain for messages. hscMain also needs
626 -- the .hi and .o filenames, and this is as good a way
627 -- as any to generate them, and better than most. (e.g. takes
628 -- into accout the -osuf flags)
629 location1 <- mkHomeModLocation2 dflags mod_name basename suff
631 -- Boot-ify it if necessary
632 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
633 | otherwise = location1
636 -- Take -ohi into account if present
637 -- This can't be done in mkHomeModuleLocation because
638 -- it only applies to the module being compiles
639 let ohi = outputHi dflags
640 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
641 | otherwise = location2
643 -- Take -o into account if present
644 -- Very like -ohi, but we must *only* do this if we aren't linking
645 -- (If we're linking then the -o applies to the linked thing, not to
646 -- the object file for one module.)
647 -- Note the nasty duplication with the same computation in compileFile above
648 let expl_o_file = outputFile dflags
649 location4 | Just ofile <- expl_o_file
650 , isNoLink (ghcLink dflags)
651 = location3 { ml_obj_file = ofile }
652 | otherwise = location3
654 -- Make the ModSummary to hand to hscMain
655 src_timestamp <- getModificationTime (basename ++ '.':suff)
657 unused_field = panic "runPhase:ModSummary field"
658 -- Some fields are not looked at by hscMain
659 mod_summary = ModSummary { ms_mod = mod_name,
660 ms_hsc_src = src_flavour,
661 ms_hspp_file = Just input_fn,
662 ms_hspp_buf = hspp_buf,
663 ms_location = location4,
664 ms_hs_date = src_timestamp,
665 ms_obj_date = Nothing,
666 ms_imps = unused_field,
667 ms_srcimps = unused_field }
669 o_file = ml_obj_file location4 -- The real object file
672 -- Figure out if the source has changed, for recompilation avoidance.
674 -- Setting source_unchanged to True means that M.o seems
675 -- to be up to date wrt M.hs; so no need to recompile unless imports have
676 -- changed (which the compiler itself figures out).
677 -- Setting source_unchanged to False tells the compiler that M.o is out of
678 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
679 let do_recomp = dopt Opt_RecompChecking dflags
681 if not do_recomp || not (isStopLn stop)
682 -- Set source_unchanged to False unconditionally if
683 -- (a) recompilation checker is off, or
684 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
686 -- Otherwise look at file modification dates
687 else do o_file_exists <- doesFileExist o_file
689 then return False -- Need to recompile
690 else do t2 <- getModificationTime o_file
691 if t2 > src_timestamp
696 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
697 let next_phase = hscNextPhase dflags src_flavour hsc_lang
698 output_fn <- get_output_fn next_phase (Just location4)
700 let dflags' = dflags { hscTarget = hsc_lang,
701 hscOutName = output_fn,
702 hscStubCOutName = basename ++ "_stub.c",
703 hscStubHOutName = basename ++ "_stub.h",
704 extCoreName = basename ++ ".hcr" }
706 hsc_env <- newHscEnv dflags'
708 -- Tell the finder cache about this module
709 addHomeModuleToFinder hsc_env mod_name location4
712 result <- hscMain hsc_env printErrorsAndWarnings
713 mod_summary source_unchanged
714 False -- No object file
716 Nothing -- No "module i of n" progress info
720 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
722 HscNoRecomp details iface -> do
723 SysTools.touch dflags' "Touching object file" o_file
724 -- The .o file must have a later modification date
725 -- than the source file (else we wouldn't be in HscNoRecomp)
726 -- but we touch it anyway, to keep 'make' happy (we think).
727 return (StopLn, dflags', Just location4, o_file)
729 HscRecomp _details _iface
730 stub_h_exists stub_c_exists
731 _maybe_interpreted_code -> do
734 maybe_stub_o <- compileStub dflags' stub_c_exists
737 Just stub_o -> consIORef v_Ld_inputs stub_o
739 -- In the case of hs-boot files, generate a dummy .o-boot
740 -- stamp file for the benefit of Make
742 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
745 return (next_phase, dflags', Just location4, output_fn)
747 -----------------------------------------------------------------------------
750 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
752 output_fn <- get_output_fn Cmm maybe_loc
753 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
754 return (Cmm, dflags, maybe_loc, output_fn)
756 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
758 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
759 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
760 output_fn <- get_output_fn next_phase maybe_loc
762 let dflags' = dflags { hscTarget = hsc_lang,
763 hscOutName = output_fn,
764 hscStubCOutName = basename ++ "_stub.c",
765 hscStubHOutName = basename ++ "_stub.h",
766 extCoreName = basename ++ ".hcr" }
768 ok <- hscCmmFile dflags' input_fn
770 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
772 return (next_phase, dflags, maybe_loc, output_fn)
774 -----------------------------------------------------------------------------
777 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
778 -- way too many hacks, and I can't say I've ever used it anyway.
780 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
781 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
782 = do let cc_opts = getOpts dflags opt_c
783 hcc = cc_phase `eqPhase` HCc
785 let cmdline_include_paths = includePaths dflags
787 -- HC files have the dependent packages stamped into them
788 pkgs <- if hcc then getHCFilePackages input_fn else return []
790 -- add package include paths even if we're just compiling .c
791 -- files; this is the Value Add(TM) that using ghc instead of
793 pkg_include_dirs <- getPackageIncludePath dflags pkgs
794 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
795 (cmdline_include_paths ++ pkg_include_dirs)
797 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
798 let pic_c_flags = picCCOpts dflags
800 let verb = getVerbFlag dflags
802 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
804 let split_objs = dopt Opt_SplitObjs dflags
805 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
808 let excessPrecision = dopt Opt_ExcessPrecision dflags
812 let mangle = dopt Opt_DoAsmMangling dflags
814 | hcc && mangle = Mangle
816 output_fn <- get_output_fn next_phase maybe_loc
818 -- force the C compiler to interpret this file as C when
819 -- compiling .hc files, by adding the -x c option.
820 let langopt | hcc = [ SysTools.Option "-x", SysTools.Option "c"]
823 SysTools.runCc dflags (langopt ++
824 [ SysTools.FileOption "" input_fn
825 , SysTools.Option "-o"
826 , SysTools.FileOption "" output_fn
828 ++ map SysTools.Option (
834 ++ [ verb, "-S", "-Wimplicit", "-O" ]
835 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
838 ++ (if excessPrecision then [] else [ "-ffloat-store" ])
843 return (next_phase, dflags, maybe_loc, output_fn)
845 -- ToDo: postprocess the output from gcc
847 -----------------------------------------------------------------------------
850 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
851 = do let mangler_opts = getOpts dflags opt_m
854 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
856 machdep_opts <- return []
859 let split = dopt Opt_SplitObjs dflags
861 | split = SplitMangle
863 output_fn <- get_output_fn next_phase maybe_loc
865 SysTools.runMangle dflags (map SysTools.Option mangler_opts
866 ++ [ SysTools.FileOption "" input_fn
867 , SysTools.FileOption "" output_fn
869 ++ map SysTools.Option machdep_opts)
871 return (next_phase, dflags, maybe_loc, output_fn)
873 -----------------------------------------------------------------------------
876 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
877 = do -- tmp_pfx is the prefix used for the split .s files
878 -- We also use it as the file to contain the no. of split .s files (sigh)
879 split_s_prefix <- SysTools.newTempName dflags "split"
880 let n_files_fn = split_s_prefix
882 SysTools.runSplit dflags
883 [ SysTools.FileOption "" input_fn
884 , SysTools.FileOption "" split_s_prefix
885 , SysTools.FileOption "" n_files_fn
888 -- Save the number of split files for future references
889 s <- readFile n_files_fn
890 let n_files = read s :: Int
891 writeIORef v_Split_info (split_s_prefix, n_files)
893 -- Remember to delete all these files
894 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
897 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
898 -- we don't use the filename
900 -----------------------------------------------------------------------------
903 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
904 = do let as_opts = getOpts dflags opt_a
905 let cmdline_include_paths = includePaths dflags
907 output_fn <- get_output_fn StopLn maybe_loc
909 -- we create directories for the object file, because it
910 -- might be a hierarchical module.
911 createDirectoryHierarchy (directoryOf output_fn)
913 SysTools.runAs dflags
914 (map SysTools.Option as_opts
915 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
916 ++ [ SysTools.Option "-c"
917 , SysTools.FileOption "" input_fn
918 , SysTools.Option "-o"
919 , SysTools.FileOption "" output_fn
922 return (StopLn, dflags, maybe_loc, output_fn)
925 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
926 = do let as_opts = getOpts dflags opt_a
928 (split_s_prefix, n) <- readIORef v_Split_info
931 | Just d <- outputDir dflags = d
932 | otherwise = basename ++ "_split"
935 = do let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
936 let output_o = replaceFilenameDirectory
937 (basename ++ "__" ++ show n ++ ".o")
939 let osuf = objectSuf dflags
940 let real_o = replaceFilenameSuffix output_o osuf
941 SysTools.runAs dflags
942 (map SysTools.Option as_opts ++
943 [ SysTools.Option "-c"
944 , SysTools.Option "-o"
945 , SysTools.FileOption "" real_o
946 , SysTools.FileOption "" input_s
949 mapM_ assemble_file [1..n]
951 output_fn <- get_output_fn StopLn maybe_loc
952 return (StopLn, dflags, maybe_loc, output_fn)
954 -----------------------------------------------------------------------------
955 -- MoveBinary sort-of-phase
956 -- After having produced a binary, move it somewhere else and generate a
957 -- wrapper script calling the binary. Currently, we need this only in
958 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
959 -- central directory.
960 -- This is called from staticLink below, after linking. I haven't made it
961 -- a separate phase to minimise interfering with other modules, and
962 -- we don't need the generality of a phase (MoveBinary is always
963 -- done after linking and makes only sense in a parallel setup) -- HWL
965 runPhase_MoveBinary input_fn
968 pvm_root <- getEnv "PVM_ROOT"
969 pvm_arch <- getEnv "PVM_ARCH"
971 pvm_executable_base = "=" ++ input_fn
972 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
973 -- nuke old binary; maybe use configur'ed names for cp and rm?
974 system ("rm -f " ++ pvm_executable)
975 -- move the newly created binary into PVM land
976 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
977 -- generate a wrapper script for running a parallel prg under PVM
978 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
981 -- generates a Perl skript starting a parallel prg under PVM
982 mk_pvm_wrapper_script :: String -> String -> String -> String
983 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
985 "eval 'exec perl -S $0 ${1+\"$@\"}'",
986 " if $running_under_some_shell;",
987 "# =!=!=!=!=!=!=!=!=!=!=!",
988 "# This script is automatically generated: DO NOT EDIT!!!",
989 "# Generated by Glasgow Haskell Compiler",
990 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
992 "$pvm_executable = '" ++ pvm_executable ++ "';",
993 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
994 "$SysMan = '" ++ sysMan ++ "';",
996 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
997 "# first, some magical shortcuts to run "commands" on the binary",
998 "# (which is hidden)",
999 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1000 " local($cmd) = $1;",
1001 " system("$cmd $pvm_executable");",
1002 " exit(0); # all done",
1005 "# Now, run the real binary; process the args first",
1006 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1008 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1009 "@nonPVM_args = ();",
1010 "$in_RTS_args = 0;",
1012 "args: while ($a = shift(@ARGV)) {",
1013 " if ( $a eq '+RTS' ) {",
1014 " $in_RTS_args = 1;",
1015 " } elsif ( $a eq '-RTS' ) {",
1016 " $in_RTS_args = 0;",
1018 " if ( $a eq '-d' && $in_RTS_args ) {",
1020 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1021 " $nprocessors = $1;",
1022 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1023 " $nprocessors = $1;",
1025 " push(@nonPVM_args, $a);",
1029 "local($return_val) = 0;",
1030 "# Start the parallel execution by calling SysMan",
1031 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1032 "$return_val = $?;",
1033 "# ToDo: fix race condition moving files and flushing them!!",
1034 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1035 "exit($return_val);"
1038 -----------------------------------------------------------------------------
1039 -- Complain about non-dynamic flags in OPTIONS pragmas
1041 checkProcessArgsResult flags filename
1042 = do when (notNull flags) (throwDyn (ProgramError (
1043 showSDoc (hang (text filename <> char ':')
1044 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1045 hsep (map text flags)))
1048 -----------------------------------------------------------------------------
1049 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1051 getHCFilePackages :: FilePath -> IO [PackageId]
1052 getHCFilePackages filename =
1053 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1056 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1057 return (map stringToPackageId (words rest))
1061 -----------------------------------------------------------------------------
1062 -- Static linking, of .o files
1064 -- The list of packages passed to link is the list of packages on
1065 -- which this program depends, as discovered by the compilation
1066 -- manager. It is combined with the list of packages that the user
1067 -- specifies on the command line with -package flags.
1069 -- In one-shot linking mode, we can't discover the package
1070 -- dependencies (because we haven't actually done any compilation or
1071 -- read any interface files), so the user must explicitly specify all
1074 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1075 staticLink dflags o_files dep_packages = do
1076 let verb = getVerbFlag dflags
1078 -- get the full list of packages to link with, by combining the
1079 -- explicit packages with the auto packages and all of their
1080 -- dependencies, and eliminating duplicates.
1082 let o_file = outputFile dflags
1083 #if defined(mingw32_HOST_OS)
1084 let output_fn = case o_file of { Just s -> s; Nothing -> "main.exe"; }
1086 let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; }
1089 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1090 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1092 let lib_paths = libraryPaths dflags
1093 let lib_path_opts = map ("-L"++) lib_paths
1095 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1097 #ifdef darwin_TARGET_OS
1098 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1099 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1101 let framework_paths = frameworkPaths dflags
1102 framework_path_opts = map ("-F"++) framework_paths
1104 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1105 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1107 let frameworks = cmdlineFrameworks dflags
1108 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1109 -- reverse because they're added in reverse order from the cmd line
1112 -- probably _stub.o files
1113 extra_ld_inputs <- readIORef v_Ld_inputs
1115 -- opts from -optl-<blah> (including -l<blah> options)
1116 let extra_ld_opts = getOpts dflags opt_l
1118 let ways = wayNames dflags
1120 -- Here are some libs that need to be linked at the *end* of
1121 -- the command line, because they contain symbols that are referred to
1122 -- by the RTS. We can't therefore use the ordinary way opts for these.
1124 debug_opts | WayDebug `elem` ways = [
1125 #if defined(HAVE_LIBBFD)
1132 thread_opts | WayThreaded `elem` ways = [
1133 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1136 #if defined(osf3_TARGET_OS)
1142 let (md_c_flags, _) = machdepCCOpts dflags
1143 SysTools.runLink dflags (
1144 [ SysTools.Option verb
1145 , SysTools.Option "-o"
1146 , SysTools.FileOption "" output_fn
1148 ++ map SysTools.Option (
1154 #ifdef darwin_TARGET_OS
1155 ++ framework_path_opts
1158 ++ pkg_lib_path_opts
1160 #ifdef darwin_TARGET_OS
1161 ++ pkg_framework_path_opts
1162 ++ pkg_framework_opts
1168 -- parallel only: move binary to another dir -- HWL
1169 when (WayPar `elem` ways)
1170 (do success <- runPhase_MoveBinary output_fn
1171 if success then return ()
1172 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1174 -----------------------------------------------------------------------------
1175 -- Making a DLL (only for Win32)
1177 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1178 doMkDLL dflags o_files dep_packages = do
1179 let verb = getVerbFlag dflags
1180 let static = opt_Static
1181 let no_hs_main = dopt Opt_NoHsMain dflags
1182 let o_file = outputFile dflags
1183 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1185 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1186 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1188 let lib_paths = libraryPaths dflags
1189 let lib_path_opts = map ("-L"++) lib_paths
1191 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1193 -- probably _stub.o files
1194 extra_ld_inputs <- readIORef v_Ld_inputs
1196 -- opts from -optdll-<blah>
1197 let extra_ld_opts = getOpts dflags opt_dll
1199 let pstate = pkgState dflags
1200 rts_id | ExtPackage id <- rtsPackageId pstate = id
1201 | otherwise = panic "staticLink: rts package missing"
1202 base_id | ExtPackage id <- basePackageId pstate = id
1203 | otherwise = panic "staticLink: base package missing"
1204 rts_pkg = getPackageDetails pstate rts_id
1205 base_pkg = getPackageDetails pstate base_id
1207 let extra_os = if static || no_hs_main
1209 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1210 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1212 let (md_c_flags, _) = machdepCCOpts dflags
1213 SysTools.runMkDLL dflags
1214 ([ SysTools.Option verb
1215 , SysTools.Option "-o"
1216 , SysTools.FileOption "" output_fn
1218 ++ map SysTools.Option (
1222 ++ [ "--target=i386-mingw32" ]
1226 ++ pkg_lib_path_opts
1228 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1230 else [ "--export-all" ])
1233 -- -----------------------------------------------------------------------------
1236 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1237 doCpp dflags raw include_cc_opts input_fn output_fn = do
1238 let hscpp_opts = getOpts dflags opt_P
1239 let cmdline_include_paths = includePaths dflags
1241 pkg_include_dirs <- getPackageIncludePath dflags []
1242 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1243 (cmdline_include_paths ++ pkg_include_dirs)
1245 let verb = getVerbFlag dflags
1248 | not include_cc_opts = []
1249 | otherwise = (optc ++ md_c_flags)
1251 optc = getOpts dflags opt_c
1252 (md_c_flags, _) = machdepCCOpts dflags
1254 let cpp_prog args | raw = SysTools.runCpp dflags args
1255 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1258 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1259 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1260 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1261 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1262 -- remember, in code we *compile*, the HOST is the same our TARGET,
1263 -- and BUILD is the same as our HOST.
1265 cpp_prog ([SysTools.Option verb]
1266 ++ map SysTools.Option include_paths
1267 ++ map SysTools.Option hsSourceCppOpts
1268 ++ map SysTools.Option hscpp_opts
1269 ++ map SysTools.Option cc_opts
1270 ++ map SysTools.Option target_defs
1271 ++ [ SysTools.Option "-x"
1272 , SysTools.Option "c"
1273 , SysTools.Option input_fn
1274 -- We hackily use Option instead of FileOption here, so that the file
1275 -- name is not back-slashed on Windows. cpp is capable of
1276 -- dealing with / in filenames, so it works fine. Furthermore
1277 -- if we put in backslashes, cpp outputs #line directives
1278 -- with *double* backslashes. And that in turn means that
1279 -- our error messages get double backslashes in them.
1280 -- In due course we should arrange that the lexer deals
1281 -- with these \\ escapes properly.
1282 , SysTools.Option "-o"
1283 , SysTools.FileOption "" output_fn
1286 cHaskell1Version = "5" -- i.e., Haskell 98
1288 -- Default CPP defines in Haskell source
1290 [ "-D__HASKELL1__="++cHaskell1Version
1291 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1293 , "-D__CONCURRENT_HASKELL__"
1296 -----------------------------------------------------------------------------
1297 -- Reading OPTIONS pragmas
1299 getOptionsFromSource
1300 :: String -- input file
1301 -> IO [String] -- options, if any
1302 getOptionsFromSource file
1303 = do h <- openFile file ReadMode
1304 look h `finally` hClose h
1307 r <- tryJust ioErrors (hGetLine h)
1309 Left e | isEOFError e -> return []
1310 | otherwise -> ioError e
1312 let l = removeSpaces l'
1314 () | null l -> look h
1315 | prefixMatch "#" l -> look h
1316 | prefixMatch "{-# LINE" l -> look h -- -}
1317 | Just opts <- matchOptions l
1318 -> do rest <- look h
1319 return (opts ++ rest)
1320 | otherwise -> return []
1322 getOptionsFromStringBuffer :: StringBuffer -> [(Int,String)]
1323 getOptionsFromStringBuffer buffer@(StringBuffer _ len# _) =
1325 ls = lines (lexemeToString buffer (I# len#)) -- lazy, so it's ok
1331 let l = removeSpaces l'
1333 () | null l -> look (i+1) ls
1334 | prefixMatch "#" l -> look (i+1) ls
1335 | prefixMatch "{-# LINE" l -> look (i+1) ls -- -}
1336 | Just opts <- matchOptions l
1337 -> zip (repeat i) opts ++ look (i+1) ls
1340 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1341 -- instead of OPTIONS_GHC, but that is deprecated.
1343 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1344 = matchOptions1 (removeSpaces s1)
1349 | Just s2 <- maybePrefixMatch "OPTIONS" s
1351 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1353 | not (is_ident (head s2))
1356 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1357 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1358 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1359 = Just ["-#include", removeSpaces (reverse s3)]
1360 | otherwise = Nothing
1362 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1363 | otherwise = Nothing
1366 optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages
1367 optionsErrorMsgs unhandled_flags flags_lines filename
1368 = (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
1370 unhandled_flags_lines = [ (l,f) | f <- unhandled_flags,
1371 (l,f') <- flags_lines, f == f' ]
1373 ErrUtils.mkPlainErrMsg (srcLocSpan loc) $
1374 text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag
1376 loc = mkSrcLoc (mkFastString filename) line 0
1377 -- ToDo: we need a better SrcSpan here
1379 -- -----------------------------------------------------------------------------
1382 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1383 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1384 hscNextPhase dflags other hsc_lang =
1387 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1389 HscNothing -> StopLn
1390 HscInterpreted -> StopLn
1394 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1395 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1396 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1397 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1400 keep_hc = dopt Opt_KeepHcFiles dflags
1402 -- don't change the lang if we're interpreting
1403 | current_hsc_lang == HscInterpreted = current_hsc_lang
1405 -- force -fvia-C if we are being asked for a .hc file
1406 | HCc <- stop = HscC
1408 -- otherwise, stick to the plan
1409 | otherwise = current_hsc_lang
1411 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1412 -- The split prefix and number of files