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' }
169 hsc_result <- hscMain hsc_env' msg_act mod_summary
170 source_unchanged have_object old_iface
171 (Just (mod_index, nmods))
174 HscFail -> return CompErrs
176 HscNoRecomp details iface ->
177 ASSERT(isJust maybe_old_linkable)
178 return (CompOK details iface maybe_old_linkable)
180 HscRecomp details iface
181 stub_h_exists stub_c_exists maybe_interpreted_code
183 | isHsBoot src_flavour -- No further compilation to do
184 -> return (CompOK details iface Nothing)
186 | otherwise -- Normal Haskell source files
188 maybe_stub_o <- compileStub dflags' stub_c_exists
189 let stub_unlinked = case maybe_stub_o of
191 Just stub_o -> [ DotO stub_o ]
193 (hs_unlinked, unlinked_time) <-
196 -- in interpreted mode, just return the compiled code
197 -- as our "unlinked" object.
199 case maybe_interpreted_code of
201 Just comp_bc -> return ([BCOs comp_bc], ms_hs_date mod_summary)
202 -- Why do we use the timestamp of the source file here,
203 -- rather than the current time? This works better in
204 -- the case where the local clock is out of sync
205 -- with the filesystem's clock. It's just as accurate:
206 -- if the source is modified, then the linkable will
209 Nothing -> panic "compile: no interpreted code"
211 -- we're in batch mode: finish the compilation pipeline.
213 let object_filename = ml_obj_file location
215 runPipeline StopLn dflags output_fn Persistent
217 -- the object filename comes from the ModLocation
219 o_time <- getModificationTime object_filename
220 return ([DotO object_filename], o_time)
222 let linkable = LM unlinked_time this_mod
223 (hs_unlinked ++ stub_unlinked)
225 return (CompOK details iface (Just linkable))
227 -----------------------------------------------------------------------------
228 -- stub .h and .c files (for foreign export support)
230 compileStub dflags stub_c_exists
231 | not stub_c_exists = return Nothing
233 -- compile the _stub.c file w/ gcc
234 let stub_c = hscStubCOutName dflags
235 (_, stub_o) <- runPipeline StopLn dflags
236 stub_c Persistent Nothing{-no ModLocation-}
240 -- ---------------------------------------------------------------------------
243 link :: GhcMode -- interactive or batch
244 -> DynFlags -- dynamic flags
245 -> Bool -- attempt linking in batch mode?
246 -> HomePackageTable -- what to link
249 -- For the moment, in the batch linker, we don't bother to tell doLink
250 -- which packages to link -- it just tries all that are available.
251 -- batch_attempt_linking should only be *looked at* in batch mode. It
252 -- should only be True if the upsweep was successful and someone
253 -- exports main, i.e., we have good reason to believe that linking
257 link Interactive dflags batch_attempt_linking hpt
258 = do -- Not Linking...(demand linker will do the job)
262 link JustTypecheck dflags batch_attempt_linking hpt
265 link BatchCompile dflags batch_attempt_linking hpt
266 | batch_attempt_linking
269 home_mod_infos = moduleEnvElts hpt
271 -- the packages we depend on
272 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
274 -- the linkables to link
275 linkables = map (fromJust.hm_linkable) home_mod_infos
277 debugTraceMsg dflags 3 "link: linkables are ..."
278 debugTraceMsg dflags 3 (showSDoc (vcat (map ppr linkables)))
280 -- check for the -no-link flag
281 if isNoLink (ghcLink dflags)
282 then do debugTraceMsg dflags 3 "link(batch): linking omitted (-c flag given)."
286 debugTraceMsg dflags 1 "Linking ..."
288 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
289 obj_files = concatMap getOfiles linkables
291 -- Don't showPass in Batch mode; doLink will do that for us.
292 staticLink dflags obj_files pkg_deps
294 debugTraceMsg dflags 3 "link: done"
296 -- staticLink only returns if it succeeds
300 = do debugTraceMsg dflags 3 "link(batch): upsweep (partially) failed OR"
301 debugTraceMsg dflags 3 " Main.main not exported; not linking."
305 -- -----------------------------------------------------------------------------
306 -- Compile files in one-shot mode.
308 oneShot :: DynFlags -> Phase -> [String] -> IO ()
309 oneShot dflags stop_phase srcs = do
310 o_files <- mapM (compileFile dflags stop_phase) srcs
311 doLink dflags stop_phase o_files
313 compileFile :: DynFlags -> Phase -> FilePath -> IO FilePath
314 compileFile dflags stop_phase src = do
315 exists <- doesFileExist src
317 throwDyn (CmdLineError ("does not exist: " ++ src))
320 split = dopt Opt_SplitObjs dflags
321 mb_o_file = outputFile dflags
322 ghc_link = ghcLink dflags -- Set by -c or -no-link
324 -- When linking, the -o argument refers to the linker's output.
325 -- otherwise, we use it as the name for the pipeline's output.
327 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
328 -- -o foo applies to linker
329 | Just o_file <- mb_o_file = SpecificFile o_file
330 -- -o foo applies to the file we are compiling now
331 | otherwise = Persistent
333 stop_phase' = case stop_phase of
334 As | split -> SplitAs
337 (_, out_file) <- runPipeline stop_phase' dflags
338 src output Nothing{-no ModLocation-}
342 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
343 doLink dflags stop_phase o_files
344 | not (isStopLn stop_phase)
345 = return () -- We stopped before the linking phase
348 = case ghcLink dflags of
350 StaticLink -> staticLink dflags o_files link_pkgs
351 MkDLL -> doMkDLL dflags o_files link_pkgs
353 -- Always link in the haskell98 package for static linking. Other
354 -- packages have to be specified via the -package flag.
356 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
360 -- ---------------------------------------------------------------------------
361 -- Run a compilation pipeline, consisting of multiple phases.
363 -- This is the interface to the compilation pipeline, which runs
364 -- a series of compilation steps on a single source file, specifying
365 -- at which stage to stop.
367 -- The DynFlags can be modified by phases in the pipeline (eg. by
368 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
373 -- output should be to a temporary file: we're going to
374 -- run more compilation steps on this output later
376 -- we want a persistent file, i.e. a file in the current directory
377 -- derived from the input filename, but with the appropriate extension.
378 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
379 | SpecificFile FilePath
380 -- the output must go into the specified file.
383 :: Phase -- When to stop
384 -> DynFlags -- Dynamic flags
385 -> FilePath -- Input filename
386 -> PipelineOutput -- Output filename
387 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
388 -> IO (DynFlags, FilePath) -- (final flags, output filename)
390 runPipeline stop_phase dflags input_fn output maybe_loc
392 let (basename, suffix) = splitFilename input_fn
393 start_phase = startPhase suffix
395 -- We want to catch cases of "you can't get there from here" before
396 -- we start the pipeline, because otherwise it will just run off the
399 -- There is a partial ordering on phases, where A < B iff A occurs
400 -- before B in a normal compilation pipeline.
402 when (not (start_phase `happensBefore` stop_phase)) $
404 ("cannot compile this file to desired target: "
407 -- this is a function which will be used to calculate output file names
408 -- as we go along (we partially apply it to some of its inputs here)
409 let get_output_fn = getOutputFilename dflags stop_phase output basename
411 -- Execute the pipeline...
412 (dflags', output_fn, maybe_loc) <-
413 pipeLoop dflags start_phase stop_phase input_fn
414 basename suffix get_output_fn maybe_loc
416 -- Sometimes, a compilation phase doesn't actually generate any output
417 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
418 -- stage, but we wanted to keep the output, then we have to explicitly
422 return (dflags', output_fn)
424 do final_fn <- get_output_fn stop_phase maybe_loc
425 when (final_fn /= output_fn) $
426 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
427 ++ "'") output_fn final_fn
428 return (dflags', final_fn)
432 pipeLoop :: DynFlags -> Phase -> Phase
433 -> FilePath -> String -> Suffix
434 -> (Phase -> Maybe ModLocation -> IO FilePath)
436 -> IO (DynFlags, FilePath, Maybe ModLocation)
438 pipeLoop dflags phase stop_phase
439 input_fn orig_basename orig_suff
440 orig_get_output_fn maybe_loc
442 | phase `eqPhase` stop_phase -- All done
443 = return (dflags, input_fn, maybe_loc)
445 | not (phase `happensBefore` stop_phase)
446 -- Something has gone wrong. We'll try to cover all the cases when
447 -- this could happen, so if we reach here it is a panic.
448 -- eg. it might happen if the -C flag is used on a source file that
449 -- has {-# OPTIONS -fasm #-}.
450 = panic ("pipeLoop: at phase " ++ show phase ++
451 " but I wanted to stop at phase " ++ show stop_phase)
454 = do { (next_phase, dflags', maybe_loc, output_fn)
455 <- runPhase phase stop_phase dflags orig_basename
456 orig_suff input_fn orig_get_output_fn maybe_loc
457 ; pipeLoop dflags' next_phase stop_phase output_fn
458 orig_basename orig_suff orig_get_output_fn maybe_loc }
461 :: DynFlags -> Phase -> PipelineOutput -> String
462 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
463 getOutputFilename dflags stop_phase output basename
467 odir = outputDir dflags
468 osuf = objectSuf dflags
469 keep_hc = dopt Opt_KeepHcFiles dflags
470 keep_raw_s = dopt Opt_KeepRawSFiles dflags
471 keep_s = dopt Opt_KeepSFiles dflags
473 myPhaseInputExt HCc = hcsuf
474 myPhaseInputExt StopLn = osuf
475 myPhaseInputExt other = phaseInputExt other
477 func next_phase maybe_location
478 | is_last_phase, Persistent <- output = persistent_fn
479 | is_last_phase, SpecificFile f <- output = return f
480 | keep_this_output = persistent_fn
481 | otherwise = newTempName dflags suffix
483 is_last_phase = next_phase `eqPhase` stop_phase
485 -- sometimes, we keep output from intermediate stages
489 Mangle | keep_raw_s -> True
491 HCc | keep_hc -> True
494 suffix = myPhaseInputExt next_phase
496 -- persistent object files get put in odir
498 | StopLn <- next_phase = return odir_persistent
499 | otherwise = return persistent
501 persistent = basename ++ '.':suffix
504 | Just loc <- maybe_location = ml_obj_file loc
505 | Just d <- odir = replaceFilenameDirectory persistent d
506 | otherwise = persistent
509 -- -----------------------------------------------------------------------------
510 -- Each phase in the pipeline returns the next phase to execute, and the
511 -- name of the file in which the output was placed.
513 -- We must do things dynamically this way, because we often don't know
514 -- what the rest of the phases will be until part-way through the
515 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
516 -- of a source file can change the latter stages of the pipeline from
517 -- taking the via-C route to using the native code generator.
519 runPhase :: Phase -- Do this phase first
520 -> Phase -- Stop just before this phase
522 -> String -- basename of original input source
523 -> String -- its extension
524 -> FilePath -- name of file which contains the input to this phase.
525 -> (Phase -> Maybe ModLocation -> IO FilePath)
526 -- how to calculate the output filename
527 -> Maybe ModLocation -- the ModLocation, if we have one
528 -> IO (Phase, -- next phase
529 DynFlags, -- new dynamic flags
530 Maybe ModLocation, -- the ModLocation, if we have one
531 FilePath) -- output filename
533 -- Invariant: the output filename always contains the output
534 -- Interesting case: Hsc when there is no recompilation to do
535 -- Then the output filename is still a .o file
537 -------------------------------------------------------------------------------
540 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
541 = do let unlit_flags = getOpts dflags opt_L
542 -- The -h option passes the file name for unlit to put in a #line directive
543 output_fn <- get_output_fn (Cpp sf) maybe_loc
545 SysTools.runUnlit dflags
546 (map SysTools.Option unlit_flags ++
547 [ SysTools.Option "-h"
548 , SysTools.Option input_fn
549 , SysTools.FileOption "" input_fn
550 , SysTools.FileOption "" output_fn
553 return (Cpp sf, dflags, maybe_loc, output_fn)
555 -------------------------------------------------------------------------------
556 -- Cpp phase : (a) gets OPTIONS out of file
557 -- (b) runs cpp if necessary
559 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
560 = do src_opts <- getOptionsFromSource input_fn
561 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
562 checkProcessArgsResult unhandled_flags (basename++'.':suff)
564 if not (dopt Opt_Cpp dflags) then
565 -- no need to preprocess CPP, just pass input file along
566 -- to the next phase of the pipeline.
567 return (HsPp sf, dflags, maybe_loc, input_fn)
569 output_fn <- get_output_fn (HsPp sf) maybe_loc
570 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
571 return (HsPp sf, dflags, maybe_loc, output_fn)
573 -------------------------------------------------------------------------------
576 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
577 = do if not (dopt Opt_Pp dflags) then
578 -- no need to preprocess, just pass input file along
579 -- to the next phase of the pipeline.
580 return (Hsc sf, dflags, maybe_loc, input_fn)
582 let hspp_opts = getOpts dflags opt_F
583 let orig_fn = basename ++ '.':suff
584 output_fn <- get_output_fn (Hsc sf) maybe_loc
585 SysTools.runPp dflags
586 ( [ SysTools.Option orig_fn
587 , SysTools.Option input_fn
588 , SysTools.FileOption "" output_fn
590 map SysTools.Option hspp_opts
592 return (Hsc sf, dflags, maybe_loc, output_fn)
594 -----------------------------------------------------------------------------
597 -- Compilation of a single module, in "legacy" mode (_not_ under
598 -- the direction of the compilation manager).
599 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
600 = do -- normal Hsc mode, not mkdependHS
602 -- we add the current directory (i.e. the directory in which
603 -- the .hs files resides) to the import path, since this is
604 -- what gcc does, and it's probably what you want.
605 let current_dir = directoryOf basename
607 paths = includePaths dflags0
608 dflags = dflags0 { includePaths = current_dir : paths }
610 -- gather the imports and module name
611 (hspp_buf,mod_name) <-
613 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
614 ; m <- getCoreModuleName input_fn
615 ; return (Nothing, mkModule m) }
617 other -> do { buf <- hGetStringBuffer input_fn
618 ; (_,_,mod_name) <- getImports dflags buf input_fn
619 ; return (Just buf, mod_name) }
621 -- Build a ModLocation to pass to hscMain.
622 -- The source filename is rather irrelevant by now, but it's used
623 -- by hscMain for messages. hscMain also needs
624 -- the .hi and .o filenames, and this is as good a way
625 -- as any to generate them, and better than most. (e.g. takes
626 -- into accout the -osuf flags)
627 location1 <- mkHomeModLocation2 dflags mod_name basename suff
629 -- Boot-ify it if necessary
630 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
631 | otherwise = location1
634 -- Take -ohi into account if present
635 -- This can't be done in mkHomeModuleLocation because
636 -- it only applies to the module being compiles
637 let ohi = outputHi dflags
638 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
639 | otherwise = location2
641 -- Take -o into account if present
642 -- Very like -ohi, but we must *only* do this if we aren't linking
643 -- (If we're linking then the -o applies to the linked thing, not to
644 -- the object file for one module.)
645 -- Note the nasty duplication with the same computation in compileFile above
646 let expl_o_file = outputFile dflags
647 location4 | Just ofile <- expl_o_file
648 , isNoLink (ghcLink dflags)
649 = location3 { ml_obj_file = ofile }
650 | otherwise = location3
652 -- Make the ModSummary to hand to hscMain
653 src_timestamp <- getModificationTime (basename ++ '.':suff)
655 unused_field = panic "runPhase:ModSummary field"
656 -- Some fields are not looked at by hscMain
657 mod_summary = ModSummary { ms_mod = mod_name,
658 ms_hsc_src = src_flavour,
659 ms_hspp_file = Just input_fn,
660 ms_hspp_buf = hspp_buf,
661 ms_location = location4,
662 ms_hs_date = src_timestamp,
663 ms_obj_date = Nothing,
664 ms_imps = unused_field,
665 ms_srcimps = unused_field }
667 o_file = ml_obj_file location4 -- The real object file
670 -- Figure out if the source has changed, for recompilation avoidance.
672 -- Setting source_unchanged to True means that M.o seems
673 -- to be up to date wrt M.hs; so no need to recompile unless imports have
674 -- changed (which the compiler itself figures out).
675 -- Setting source_unchanged to False tells the compiler that M.o is out of
676 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
677 let do_recomp = dopt Opt_RecompChecking dflags
679 if not do_recomp || not (isStopLn stop)
680 -- Set source_unchanged to False unconditionally if
681 -- (a) recompilation checker is off, or
682 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
684 -- Otherwise look at file modification dates
685 else do o_file_exists <- doesFileExist o_file
687 then return False -- Need to recompile
688 else do t2 <- getModificationTime o_file
689 if t2 > src_timestamp
694 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
695 let next_phase = hscNextPhase dflags src_flavour hsc_lang
696 output_fn <- get_output_fn next_phase (Just location4)
698 let dflags' = dflags { hscTarget = hsc_lang,
699 hscOutName = output_fn,
700 hscStubCOutName = basename ++ "_stub.c",
701 hscStubHOutName = basename ++ "_stub.h",
702 extCoreName = basename ++ ".hcr" }
704 hsc_env <- newHscEnv dflags'
706 -- Tell the finder cache about this module
707 addHomeModuleToFinder hsc_env mod_name location4
710 result <- hscMain hsc_env printErrorsAndWarnings
711 mod_summary source_unchanged
712 False -- No object file
714 Nothing -- No "module i of n" progress info
718 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
720 HscNoRecomp details iface -> do
721 SysTools.touch dflags' "Touching object file" o_file
722 return (StopLn, dflags', Just location4, o_file)
724 HscRecomp _details _iface
725 stub_h_exists stub_c_exists
726 _maybe_interpreted_code -> do
729 maybe_stub_o <- compileStub dflags' stub_c_exists
732 Just stub_o -> consIORef v_Ld_inputs stub_o
734 -- In the case of hs-boot files, generate a dummy .o-boot
735 -- stamp file for the benefit of Make
737 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
740 return (next_phase, dflags', Just location4, output_fn)
742 -----------------------------------------------------------------------------
745 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
747 output_fn <- get_output_fn Cmm maybe_loc
748 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
749 return (Cmm, dflags, maybe_loc, output_fn)
751 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
753 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
754 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
755 output_fn <- get_output_fn next_phase maybe_loc
757 let dflags' = dflags { hscTarget = hsc_lang,
758 hscOutName = output_fn,
759 hscStubCOutName = basename ++ "_stub.c",
760 hscStubHOutName = basename ++ "_stub.h",
761 extCoreName = basename ++ ".hcr" }
763 ok <- hscCmmFile dflags' input_fn
765 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
767 return (next_phase, dflags, maybe_loc, output_fn)
769 -----------------------------------------------------------------------------
772 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
773 -- way too many hacks, and I can't say I've ever used it anyway.
775 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
776 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
777 = do let cc_opts = getOpts dflags opt_c
778 hcc = cc_phase `eqPhase` HCc
780 let cmdline_include_paths = includePaths dflags
782 -- HC files have the dependent packages stamped into them
783 pkgs <- if hcc then getHCFilePackages input_fn else return []
785 -- add package include paths even if we're just compiling .c
786 -- files; this is the Value Add(TM) that using ghc instead of
788 pkg_include_dirs <- getPackageIncludePath dflags pkgs
789 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
790 (cmdline_include_paths ++ pkg_include_dirs)
792 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
793 let pic_c_flags = picCCOpts dflags
795 let verb = getVerbFlag dflags
797 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
799 let split_objs = dopt Opt_SplitObjs dflags
800 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
803 let excessPrecision = dopt Opt_ExcessPrecision dflags
807 let mangle = dopt Opt_DoAsmMangling dflags
809 | hcc && mangle = Mangle
811 output_fn <- get_output_fn next_phase maybe_loc
813 -- force the C compiler to interpret this file as C when
814 -- compiling .hc files, by adding the -x c option.
815 let langopt | hcc = [ SysTools.Option "-x", SysTools.Option "c"]
818 SysTools.runCc dflags (langopt ++
819 [ SysTools.FileOption "" input_fn
820 , SysTools.Option "-o"
821 , SysTools.FileOption "" output_fn
823 ++ map SysTools.Option (
829 ++ [ verb, "-S", "-Wimplicit", "-O" ]
830 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
833 ++ (if excessPrecision then [] else [ "-ffloat-store" ])
838 return (next_phase, dflags, maybe_loc, output_fn)
840 -- ToDo: postprocess the output from gcc
842 -----------------------------------------------------------------------------
845 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
846 = do let mangler_opts = getOpts dflags opt_m
849 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
851 machdep_opts <- return []
854 let split = dopt Opt_SplitObjs dflags
856 | split = SplitMangle
858 output_fn <- get_output_fn next_phase maybe_loc
860 SysTools.runMangle dflags (map SysTools.Option mangler_opts
861 ++ [ SysTools.FileOption "" input_fn
862 , SysTools.FileOption "" output_fn
864 ++ map SysTools.Option machdep_opts)
866 return (next_phase, dflags, maybe_loc, output_fn)
868 -----------------------------------------------------------------------------
871 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
872 = do -- tmp_pfx is the prefix used for the split .s files
873 -- We also use it as the file to contain the no. of split .s files (sigh)
874 split_s_prefix <- SysTools.newTempName dflags "split"
875 let n_files_fn = split_s_prefix
877 SysTools.runSplit dflags
878 [ SysTools.FileOption "" input_fn
879 , SysTools.FileOption "" split_s_prefix
880 , SysTools.FileOption "" n_files_fn
883 -- Save the number of split files for future references
884 s <- readFile n_files_fn
885 let n_files = read s :: Int
886 writeIORef v_Split_info (split_s_prefix, n_files)
888 -- Remember to delete all these files
889 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
892 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
893 -- we don't use the filename
895 -----------------------------------------------------------------------------
898 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
899 = do let as_opts = getOpts dflags opt_a
900 let cmdline_include_paths = includePaths dflags
902 output_fn <- get_output_fn StopLn maybe_loc
904 -- we create directories for the object file, because it
905 -- might be a hierarchical module.
906 createDirectoryHierarchy (directoryOf output_fn)
908 SysTools.runAs dflags
909 (map SysTools.Option as_opts
910 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
911 ++ [ SysTools.Option "-c"
912 , SysTools.FileOption "" input_fn
913 , SysTools.Option "-o"
914 , SysTools.FileOption "" output_fn
917 return (StopLn, dflags, maybe_loc, output_fn)
920 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
921 = do let as_opts = getOpts dflags opt_a
923 (split_s_prefix, n) <- readIORef v_Split_info
926 | Just d <- outputDir dflags = d
927 | otherwise = basename ++ "_split"
930 = do let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
931 let output_o = replaceFilenameDirectory
932 (basename ++ "__" ++ show n ++ ".o")
934 let osuf = objectSuf dflags
935 let real_o = replaceFilenameSuffix output_o osuf
936 SysTools.runAs dflags
937 (map SysTools.Option as_opts ++
938 [ SysTools.Option "-c"
939 , SysTools.Option "-o"
940 , SysTools.FileOption "" real_o
941 , SysTools.FileOption "" input_s
944 mapM_ assemble_file [1..n]
946 output_fn <- get_output_fn StopLn maybe_loc
947 return (StopLn, dflags, maybe_loc, output_fn)
949 -----------------------------------------------------------------------------
950 -- MoveBinary sort-of-phase
951 -- After having produced a binary, move it somewhere else and generate a
952 -- wrapper script calling the binary. Currently, we need this only in
953 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
954 -- central directory.
955 -- This is called from staticLink below, after linking. I haven't made it
956 -- a separate phase to minimise interfering with other modules, and
957 -- we don't need the generality of a phase (MoveBinary is always
958 -- done after linking and makes only sense in a parallel setup) -- HWL
960 runPhase_MoveBinary input_fn
963 pvm_root <- getEnv "PVM_ROOT"
964 pvm_arch <- getEnv "PVM_ARCH"
966 pvm_executable_base = "=" ++ input_fn
967 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
968 -- nuke old binary; maybe use configur'ed names for cp and rm?
969 system ("rm -f " ++ pvm_executable)
970 -- move the newly created binary into PVM land
971 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
972 -- generate a wrapper script for running a parallel prg under PVM
973 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
976 -- generates a Perl skript starting a parallel prg under PVM
977 mk_pvm_wrapper_script :: String -> String -> String -> String
978 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
980 "eval 'exec perl -S $0 ${1+\"$@\"}'",
981 " if $running_under_some_shell;",
982 "# =!=!=!=!=!=!=!=!=!=!=!",
983 "# This script is automatically generated: DO NOT EDIT!!!",
984 "# Generated by Glasgow Haskell Compiler",
985 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
987 "$pvm_executable = '" ++ pvm_executable ++ "';",
988 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
989 "$SysMan = '" ++ sysMan ++ "';",
991 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
992 "# first, some magical shortcuts to run "commands" on the binary",
993 "# (which is hidden)",
994 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
995 " local($cmd) = $1;",
996 " system("$cmd $pvm_executable");",
997 " exit(0); # all done",
1000 "# Now, run the real binary; process the args first",
1001 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1003 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1004 "@nonPVM_args = ();",
1005 "$in_RTS_args = 0;",
1007 "args: while ($a = shift(@ARGV)) {",
1008 " if ( $a eq '+RTS' ) {",
1009 " $in_RTS_args = 1;",
1010 " } elsif ( $a eq '-RTS' ) {",
1011 " $in_RTS_args = 0;",
1013 " if ( $a eq '-d' && $in_RTS_args ) {",
1015 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1016 " $nprocessors = $1;",
1017 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1018 " $nprocessors = $1;",
1020 " push(@nonPVM_args, $a);",
1024 "local($return_val) = 0;",
1025 "# Start the parallel execution by calling SysMan",
1026 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1027 "$return_val = $?;",
1028 "# ToDo: fix race condition moving files and flushing them!!",
1029 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1030 "exit($return_val);"
1033 -----------------------------------------------------------------------------
1034 -- Complain about non-dynamic flags in OPTIONS pragmas
1036 checkProcessArgsResult flags filename
1037 = do when (notNull flags) (throwDyn (ProgramError (
1038 showSDoc (hang (text filename <> char ':')
1039 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1040 hsep (map text flags)))
1043 -----------------------------------------------------------------------------
1044 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1046 getHCFilePackages :: FilePath -> IO [PackageId]
1047 getHCFilePackages filename =
1048 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1051 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1052 return (map stringToPackageId (words rest))
1056 -----------------------------------------------------------------------------
1057 -- Static linking, of .o files
1059 -- The list of packages passed to link is the list of packages on
1060 -- which this program depends, as discovered by the compilation
1061 -- manager. It is combined with the list of packages that the user
1062 -- specifies on the command line with -package flags.
1064 -- In one-shot linking mode, we can't discover the package
1065 -- dependencies (because we haven't actually done any compilation or
1066 -- read any interface files), so the user must explicitly specify all
1069 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1070 staticLink dflags o_files dep_packages = do
1071 let verb = getVerbFlag dflags
1073 -- get the full list of packages to link with, by combining the
1074 -- explicit packages with the auto packages and all of their
1075 -- dependencies, and eliminating duplicates.
1077 let o_file = outputFile dflags
1078 #if defined(mingw32_HOST_OS)
1079 let output_fn = case o_file of { Just s -> s; Nothing -> "main.exe"; }
1081 let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; }
1084 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1085 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1087 let lib_paths = libraryPaths dflags
1088 let lib_path_opts = map ("-L"++) lib_paths
1090 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1092 #ifdef darwin_TARGET_OS
1093 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1094 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1096 let framework_paths = frameworkPaths dflags
1097 framework_path_opts = map ("-F"++) framework_paths
1099 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1100 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1102 let frameworks = cmdlineFrameworks dflags
1103 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1104 -- reverse because they're added in reverse order from the cmd line
1107 -- probably _stub.o files
1108 extra_ld_inputs <- readIORef v_Ld_inputs
1110 -- opts from -optl-<blah> (including -l<blah> options)
1111 let extra_ld_opts = getOpts dflags opt_l
1113 let ways = wayNames dflags
1115 -- Here are some libs that need to be linked at the *end* of
1116 -- the command line, because they contain symbols that are referred to
1117 -- by the RTS. We can't therefore use the ordinary way opts for these.
1119 debug_opts | WayDebug `elem` ways = [
1120 #if defined(HAVE_LIBBFD)
1127 thread_opts | WayThreaded `elem` ways = [
1128 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1131 #if defined(osf3_TARGET_OS)
1137 let (md_c_flags, _) = machdepCCOpts dflags
1138 SysTools.runLink dflags (
1139 [ SysTools.Option verb
1140 , SysTools.Option "-o"
1141 , SysTools.FileOption "" output_fn
1143 ++ map SysTools.Option (
1149 #ifdef darwin_TARGET_OS
1150 ++ framework_path_opts
1153 ++ pkg_lib_path_opts
1155 #ifdef darwin_TARGET_OS
1156 ++ pkg_framework_path_opts
1157 ++ pkg_framework_opts
1163 -- parallel only: move binary to another dir -- HWL
1164 when (WayPar `elem` ways)
1165 (do success <- runPhase_MoveBinary output_fn
1166 if success then return ()
1167 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1169 -----------------------------------------------------------------------------
1170 -- Making a DLL (only for Win32)
1172 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1173 doMkDLL dflags o_files dep_packages = do
1174 let verb = getVerbFlag dflags
1175 let static = opt_Static
1176 let no_hs_main = dopt Opt_NoHsMain dflags
1177 let o_file = outputFile dflags
1178 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1180 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1181 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1183 let lib_paths = libraryPaths dflags
1184 let lib_path_opts = map ("-L"++) lib_paths
1186 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1188 -- probably _stub.o files
1189 extra_ld_inputs <- readIORef v_Ld_inputs
1191 -- opts from -optdll-<blah>
1192 let extra_ld_opts = getOpts dflags opt_dll
1194 let pstate = pkgState dflags
1195 rts_id | ExtPackage id <- rtsPackageId pstate = id
1196 | otherwise = panic "staticLink: rts package missing"
1197 base_id | ExtPackage id <- basePackageId pstate = id
1198 | otherwise = panic "staticLink: base package missing"
1199 rts_pkg = getPackageDetails pstate rts_id
1200 base_pkg = getPackageDetails pstate base_id
1202 let extra_os = if static || no_hs_main
1204 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1205 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1207 let (md_c_flags, _) = machdepCCOpts dflags
1208 SysTools.runMkDLL dflags
1209 ([ SysTools.Option verb
1210 , SysTools.Option "-o"
1211 , SysTools.FileOption "" output_fn
1213 ++ map SysTools.Option (
1217 ++ [ "--target=i386-mingw32" ]
1221 ++ pkg_lib_path_opts
1223 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1225 else [ "--export-all" ])
1228 -- -----------------------------------------------------------------------------
1231 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1232 doCpp dflags raw include_cc_opts input_fn output_fn = do
1233 let hscpp_opts = getOpts dflags opt_P
1234 let cmdline_include_paths = includePaths dflags
1236 pkg_include_dirs <- getPackageIncludePath dflags []
1237 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1238 (cmdline_include_paths ++ pkg_include_dirs)
1240 let verb = getVerbFlag dflags
1243 | not include_cc_opts = []
1244 | otherwise = (optc ++ md_c_flags)
1246 optc = getOpts dflags opt_c
1247 (md_c_flags, _) = machdepCCOpts dflags
1249 let cpp_prog args | raw = SysTools.runCpp dflags args
1250 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1253 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1254 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1255 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1256 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1257 -- remember, in code we *compile*, the HOST is the same our TARGET,
1258 -- and BUILD is the same as our HOST.
1260 cpp_prog ([SysTools.Option verb]
1261 ++ map SysTools.Option include_paths
1262 ++ map SysTools.Option hsSourceCppOpts
1263 ++ map SysTools.Option hscpp_opts
1264 ++ map SysTools.Option cc_opts
1265 ++ map SysTools.Option target_defs
1266 ++ [ SysTools.Option "-x"
1267 , SysTools.Option "c"
1268 , SysTools.Option input_fn
1269 -- We hackily use Option instead of FileOption here, so that the file
1270 -- name is not back-slashed on Windows. cpp is capable of
1271 -- dealing with / in filenames, so it works fine. Furthermore
1272 -- if we put in backslashes, cpp outputs #line directives
1273 -- with *double* backslashes. And that in turn means that
1274 -- our error messages get double backslashes in them.
1275 -- In due course we should arrange that the lexer deals
1276 -- with these \\ escapes properly.
1277 , SysTools.Option "-o"
1278 , SysTools.FileOption "" output_fn
1281 cHaskell1Version = "5" -- i.e., Haskell 98
1283 -- Default CPP defines in Haskell source
1285 [ "-D__HASKELL1__="++cHaskell1Version
1286 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1288 , "-D__CONCURRENT_HASKELL__"
1291 -----------------------------------------------------------------------------
1292 -- Reading OPTIONS pragmas
1294 getOptionsFromSource
1295 :: String -- input file
1296 -> IO [String] -- options, if any
1297 getOptionsFromSource file
1298 = do h <- openFile file ReadMode
1299 look h `finally` hClose h
1302 r <- tryJust ioErrors (hGetLine h)
1304 Left e | isEOFError e -> return []
1305 | otherwise -> ioError e
1307 let l = removeSpaces l'
1309 () | null l -> look h
1310 | prefixMatch "#" l -> look h
1311 | prefixMatch "{-# LINE" l -> look h -- -}
1312 | Just opts <- matchOptions l
1313 -> do rest <- look h
1314 return (opts ++ rest)
1315 | otherwise -> return []
1317 getOptionsFromStringBuffer :: StringBuffer -> [(Int,String)]
1318 getOptionsFromStringBuffer buffer@(StringBuffer _ len# _) =
1320 ls = lines (lexemeToString buffer (I# len#)) -- lazy, so it's ok
1326 let l = removeSpaces l'
1328 () | null l -> look (i+1) ls
1329 | prefixMatch "#" l -> look (i+1) ls
1330 | prefixMatch "{-# LINE" l -> look (i+1) ls -- -}
1331 | Just opts <- matchOptions l
1332 -> zip (repeat i) opts ++ look (i+1) ls
1335 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1336 -- instead of OPTIONS_GHC, but that is deprecated.
1338 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1339 = matchOptions1 (removeSpaces s1)
1344 | Just s2 <- maybePrefixMatch "OPTIONS" s
1346 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1348 | not (is_ident (head s2))
1351 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1352 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1353 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1354 = Just ["-#include", removeSpaces (reverse s3)]
1355 | otherwise = Nothing
1357 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1358 | otherwise = Nothing
1361 optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages
1362 optionsErrorMsgs unhandled_flags flags_lines filename
1363 = (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
1365 unhandled_flags_lines = [ (l,f) | f <- unhandled_flags,
1366 (l,f') <- flags_lines, f == f' ]
1368 ErrUtils.mkPlainErrMsg (srcLocSpan loc) $
1369 text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag
1371 loc = mkSrcLoc (mkFastString filename) line 0
1372 -- ToDo: we need a better SrcSpan here
1374 -- -----------------------------------------------------------------------------
1377 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1378 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1379 hscNextPhase dflags other hsc_lang =
1382 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1384 HscNothing -> StopLn
1385 HscInterpreted -> StopLn
1389 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1390 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1391 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1392 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1395 keep_hc = dopt Opt_KeepHcFiles dflags
1397 -- don't change the lang if we're interpreting
1398 | current_hsc_lang == HscInterpreted = current_hsc_lang
1400 -- force -fvia-C if we are being asked for a .hc file
1401 | HCc <- stop = HscC
1403 -- otherwise, stick to the plan
1404 | otherwise = current_hsc_lang
1406 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1407 -- The split prefix and number of files