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, getSysMan, copy )
33 import qualified SysTools
41 import StaticFlags ( v_Ld_inputs, opt_Static, WayName(..) )
45 import StringBuffer ( hGetStringBuffer )
46 import BasicTypes ( SuccessFlag(..) )
47 import Maybes ( expectJust )
48 import ParserCoreUtils ( getCoreModuleName )
49 import SrcLoc ( unLoc )
50 import SrcLoc ( Located(..) )
53 import DATA_IOREF ( readIORef, writeIORef, IORef )
54 import GLAEXTS ( Int(..) )
60 import Data.List ( isSuffixOf )
64 -- ---------------------------------------------------------------------------
67 -- Just preprocess a file, put the result in a temp. file (used by the
68 -- compilation manager during the summary phase).
70 -- We return the augmented DynFlags, because they contain the result
71 -- of slurping in the OPTIONS pragmas
73 preprocess :: DynFlags -> (FilePath, Maybe Phase) -> IO (DynFlags, FilePath)
74 preprocess dflags (filename, mb_phase) =
75 ASSERT2(isJust mb_phase || isHaskellSrcFilename filename, text filename)
76 runPipeline anyHsc dflags (filename, mb_phase) Temporary Nothing{-no ModLocation-}
78 -- ---------------------------------------------------------------------------
81 -- Compile a single module, under the control of the compilation manager.
83 -- This is the interface between the compilation manager and the
84 -- compiler proper (hsc), where we deal with tedious details like
85 -- reading the OPTIONS pragma from the source file, and passing the
86 -- output of hsc through the C compiler.
88 -- NB. No old interface can also mean that the source has changed.
92 -> Maybe Linkable -- Just linkable <=> source unchanged
93 -> Maybe ModIface -- Old interface, if available
98 = CompOK ModDetails -- New details
100 (Maybe Linkable) -- a Maybe, for the same reasons as hm_linkable
105 compile hsc_env mod_summary maybe_old_linkable old_iface mod_index nmods = do
107 let dflags0 = ms_hspp_opts mod_summary
108 this_mod = ms_mod mod_summary
109 src_flavour = ms_hsc_src mod_summary
112 | Just l <- maybe_old_linkable, isObjectLinkable l = True
115 showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary)
117 let location = ms_location mod_summary
118 let input_fn = expectJust "compile:hs" (ml_hs_file location)
119 let input_fnpp = ms_hspp_file mod_summary
121 debugTraceMsg dflags0 2 (text "compile: input file" <+> text input_fnpp)
123 let (basename, _) = splitFilename input_fn
125 -- We add the directory in which the .hs files resides) to the import path.
126 -- This is needed when we try to compile the .hc file later, if it
127 -- imports a _stub.h file that we created here.
128 let current_dir = directoryOf basename
129 old_paths = includePaths dflags0
130 dflags = dflags0 { includePaths = current_dir : old_paths }
132 -- Figure out what lang we're generating
133 let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags)
134 -- ... and what the next phase should be
135 let next_phase = hscNextPhase dflags src_flavour hsc_lang
136 -- ... and what file to generate the output into
137 output_fn <- getOutputFilename dflags next_phase
138 Temporary basename next_phase (Just location)
140 let dflags' = dflags { hscTarget = hsc_lang,
141 hscOutName = output_fn,
142 extCoreName = basename ++ ".hcr" }
144 -- -no-recomp should also work with --make
145 let do_recomp = dopt Opt_RecompChecking dflags
146 source_unchanged = isJust maybe_old_linkable && do_recomp
147 hsc_env' = hsc_env { hsc_dflags = dflags' }
148 object_filename = ml_obj_file location
150 let getStubLinkable False = return []
152 = do stub_o <- compileStub dflags' this_mod location
153 return [ DotO stub_o ]
155 handleBatch (HscNoRecomp, iface, details)
156 = ASSERT (isJust maybe_old_linkable)
157 return (CompOK details iface maybe_old_linkable)
158 handleBatch (HscRecomp hasStub, iface, details)
159 | isHsBoot src_flavour
160 = return (CompOK details iface Nothing)
162 = do stub_unlinked <- getStubLinkable hasStub
163 (hs_unlinked, unlinked_time) <-
166 -> return ([], ms_hs_date mod_summary)
167 -- We're in --make mode: finish the compilation pipeline.
169 -> do runPipeline StopLn dflags (output_fn,Nothing) Persistent
171 -- The object filename comes from the ModLocation
172 o_time <- getModificationTime object_filename
173 return ([DotO object_filename], o_time)
174 let linkable = LM unlinked_time this_mod
175 (hs_unlinked ++ stub_unlinked)
176 return (CompOK details iface (Just linkable))
178 handleInterpreted (InteractiveNoRecomp, iface, details)
179 = ASSERT (isJust maybe_old_linkable)
180 return (CompOK details iface maybe_old_linkable)
181 handleInterpreted (InteractiveRecomp hasStub comp_bc, iface, details)
182 = do stub_unlinked <- getStubLinkable hasStub
183 let hs_unlinked = [BCOs comp_bc]
184 unlinked_time = ms_hs_date mod_summary
185 -- Why do we use the timestamp of the source file here,
186 -- rather than the current time? This works better in
187 -- the case where the local clock is out of sync
188 -- with the filesystem's clock. It's just as accurate:
189 -- if the source is modified, then the linkable will
191 let linkable = LM unlinked_time this_mod
192 (hs_unlinked ++ stub_unlinked)
193 return (CompOK details iface (Just linkable))
195 let runCompiler compiler handle
196 = do mbResult <- compiler hsc_env' mod_summary
197 source_unchanged old_iface
198 (Just (mod_index, nmods))
200 Nothing -> return CompErrs
201 Just result -> handle result
204 HscInterpreted | not (isHsBoot src_flavour) -- We can't compile boot files to
205 -- bytecode so don't even try.
206 -> runCompiler hscCompileInteractive handleInterpreted
208 -> runCompiler hscCompileNothing handleBatch
210 -> runCompiler hscCompileBatch handleBatch
212 -----------------------------------------------------------------------------
213 -- stub .h and .c files (for foreign export support)
215 -- The _stub.c file is derived from the haskell source file, possibly taking
216 -- into account the -stubdir option.
218 -- Consequently, we derive the _stub.o filename from the haskell object
221 -- This isn't necessarily the same as the object filename we
222 -- would get if we just compiled the _stub.c file using the pipeline.
225 -- ghc src/A.hs -odir obj
227 -- results in obj/A.o, and src/A_stub.c. If we compile src/A_stub.c with
228 -- -odir obj, we would get obj/src/A_stub.o, which is wrong; we want
231 compileStub :: DynFlags -> Module -> ModLocation -> IO FilePath
232 compileStub dflags mod location = do
233 let (o_base, o_ext) = splitFilename (ml_obj_file location)
234 stub_o = o_base ++ "_stub" `joinFileExt` o_ext
236 -- compile the _stub.c file w/ gcc
237 let (stub_c,_) = mkStubPaths dflags mod location
238 runPipeline StopLn dflags (stub_c,Nothing)
239 (SpecificFile stub_o) Nothing{-no ModLocation-}
244 -- ---------------------------------------------------------------------------
247 link :: GhcMode -- interactive or batch
248 -> DynFlags -- dynamic flags
249 -> Bool -- attempt linking in batch mode?
250 -> HomePackageTable -- what to link
253 -- For the moment, in the batch linker, we don't bother to tell doLink
254 -- which packages to link -- it just tries all that are available.
255 -- batch_attempt_linking should only be *looked at* in batch mode. It
256 -- should only be True if the upsweep was successful and someone
257 -- exports main, i.e., we have good reason to believe that linking
261 link Interactive dflags batch_attempt_linking hpt
262 = do -- Not Linking...(demand linker will do the job)
266 link JustTypecheck dflags batch_attempt_linking hpt
269 link BatchCompile dflags batch_attempt_linking hpt
270 | batch_attempt_linking
273 home_mod_infos = moduleEnvElts hpt
275 -- the packages we depend on
276 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
278 -- the linkables to link
279 linkables = map (expectJust "link".hm_linkable) home_mod_infos
281 debugTraceMsg dflags 3 (text "link: linkables are ..." $$ vcat (map ppr linkables))
283 -- check for the -no-link flag
284 if isNoLink (ghcLink dflags)
285 then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).")
289 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
290 obj_files = concatMap getOfiles linkables
292 exe_file = exeFileName dflags
294 -- if the modification time on the executable is later than the
295 -- modification times on all of the objects, then omit linking
296 -- (unless the -no-recomp flag was given).
297 e_exe_time <- IO.try $ getModificationTime exe_file
299 | Left _ <- e_exe_time = True
300 | Right t <- e_exe_time =
301 any (t <) (map linkableTime linkables)
303 if dopt Opt_RecompChecking dflags && not linking_needed
304 then do debugTraceMsg dflags 1 (text exe_file <+> ptext SLIT("is up to date, linking not required."))
308 debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file
311 -- Don't showPass in Batch mode; doLink will do that for us.
312 let link = case ghcLink dflags of
314 StaticLink -> staticLink
315 link dflags obj_files pkg_deps
317 debugTraceMsg dflags 3 (text "link: done")
319 -- staticLink only returns if it succeeds
323 = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$
324 text " Main.main not exported; not linking.")
328 -- -----------------------------------------------------------------------------
329 -- Compile files in one-shot mode.
331 oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO ()
332 oneShot dflags stop_phase srcs = do
333 o_files <- mapM (compileFile dflags stop_phase) srcs
334 doLink dflags stop_phase o_files
336 compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath
337 compileFile dflags stop_phase (src, mb_phase) = do
338 exists <- doesFileExist src
340 throwDyn (CmdLineError ("does not exist: " ++ src))
343 split = dopt Opt_SplitObjs dflags
344 mb_o_file = outputFile dflags
345 ghc_link = ghcLink dflags -- Set by -c or -no-link
347 -- When linking, the -o argument refers to the linker's output.
348 -- otherwise, we use it as the name for the pipeline's output.
350 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
351 -- -o foo applies to linker
352 | Just o_file <- mb_o_file = SpecificFile o_file
353 -- -o foo applies to the file we are compiling now
354 | otherwise = Persistent
356 stop_phase' = case stop_phase of
357 As | split -> SplitAs
360 (_, out_file) <- runPipeline stop_phase' dflags
361 (src, mb_phase) output Nothing{-no ModLocation-}
365 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
366 doLink dflags stop_phase o_files
367 | not (isStopLn stop_phase)
368 = return () -- We stopped before the linking phase
371 = case ghcLink dflags of
373 StaticLink -> staticLink dflags o_files link_pkgs
374 MkDLL -> doMkDLL dflags o_files link_pkgs
376 -- Always link in the haskell98 package for static linking. Other
377 -- packages have to be specified via the -package flag.
379 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
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 dflags 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 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 -> (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 :: DynFlags -> Phase -> PipelineOutput -> String
489 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
490 getOutputFilename dflags stop_phase output basename
494 odir = objectDir dflags
495 osuf = objectSuf dflags
496 keep_hc = dopt Opt_KeepHcFiles dflags
497 keep_raw_s = dopt Opt_KeepRawSFiles dflags
498 keep_s = dopt Opt_KeepSFiles dflags
500 myPhaseInputExt HCc = hcsuf
501 myPhaseInputExt StopLn = osuf
502 myPhaseInputExt other = phaseInputExt other
504 func next_phase maybe_location
505 | is_last_phase, Persistent <- output = persistent_fn
506 | is_last_phase, SpecificFile f <- output = return f
507 | keep_this_output = persistent_fn
508 | otherwise = newTempName dflags suffix
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 -> (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 (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 (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 (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, mkModule 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 -- Make the ModSummary to hand to hscMain
680 src_timestamp <- getModificationTime (basename `joinFileExt` suff)
682 unused_field = panic "runPhase:ModSummary field"
683 -- Some fields are not looked at by hscMain
684 mod_summary = ModSummary { ms_mod = mod_name,
685 ms_hsc_src = src_flavour,
686 ms_hspp_file = input_fn,
687 ms_hspp_opts = dflags,
688 ms_hspp_buf = hspp_buf,
689 ms_location = location4,
690 ms_hs_date = src_timestamp,
691 ms_obj_date = Nothing,
692 ms_imps = unused_field,
693 ms_srcimps = unused_field }
695 o_file = ml_obj_file location4 -- The real object file
698 -- Figure out if the source has changed, for recompilation avoidance.
700 -- Setting source_unchanged to True means that M.o seems
701 -- to be up to date wrt M.hs; so no need to recompile unless imports have
702 -- changed (which the compiler itself figures out).
703 -- Setting source_unchanged to False tells the compiler that M.o is out of
704 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
705 let do_recomp = dopt Opt_RecompChecking dflags
707 if not do_recomp || not (isStopLn stop)
708 -- Set source_unchanged to False unconditionally if
709 -- (a) recompilation checker is off, or
710 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
712 -- Otherwise look at file modification dates
713 else do o_file_exists <- doesFileExist o_file
715 then return False -- Need to recompile
716 else do t2 <- getModificationTime o_file
717 if t2 > src_timestamp
722 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
723 let next_phase = hscNextPhase dflags src_flavour hsc_lang
724 output_fn <- get_output_fn next_phase (Just location4)
726 let dflags' = dflags { hscTarget = hsc_lang,
727 hscOutName = output_fn,
728 extCoreName = basename ++ ".hcr" }
730 hsc_env <- newHscEnv dflags'
732 -- Tell the finder cache about this module
733 addHomeModuleToFinder hsc_env mod_name location4
736 mbResult <- hscCompileOneShot hsc_env
737 mod_summary source_unchanged
739 Nothing -- No "module i of n" progress info
742 Nothing -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
744 -> do SysTools.touch dflags' "Touching object file" o_file
745 -- The .o file must have a later modification date
746 -- than the source file (else we wouldn't be in HscNoRecomp)
747 -- but we touch it anyway, to keep 'make' happy (we think).
748 return (StopLn, dflags', Just location4, o_file)
749 Just (HscRecomp hasStub)
751 do stub_o <- compileStub dflags' mod_name location4
752 consIORef v_Ld_inputs stub_o
753 -- In the case of hs-boot files, generate a dummy .o-boot
754 -- stamp file for the benefit of Make
755 when (isHsBoot src_flavour) $
756 SysTools.touch dflags' "Touching object file" o_file
757 return (next_phase, dflags', Just location4, output_fn)
759 -----------------------------------------------------------------------------
762 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
764 output_fn <- get_output_fn Cmm maybe_loc
765 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
766 return (Cmm, dflags, maybe_loc, output_fn)
768 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
770 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
771 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
772 output_fn <- get_output_fn next_phase maybe_loc
774 let dflags' = dflags { hscTarget = hsc_lang,
775 hscOutName = output_fn,
776 extCoreName = basename ++ ".hcr" }
778 ok <- hscCmmFile dflags' input_fn
780 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
782 return (next_phase, dflags, maybe_loc, output_fn)
784 -----------------------------------------------------------------------------
787 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
788 -- way too many hacks, and I can't say I've ever used it anyway.
790 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
791 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
792 = do let cc_opts = getOpts dflags opt_c
793 hcc = cc_phase `eqPhase` HCc
795 let cmdline_include_paths = includePaths dflags
797 -- HC files have the dependent packages stamped into them
798 pkgs <- if hcc then getHCFilePackages input_fn else return []
800 -- add package include paths even if we're just compiling .c
801 -- files; this is the Value Add(TM) that using ghc instead of
803 pkg_include_dirs <- getPackageIncludePath dflags pkgs
804 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
805 (cmdline_include_paths ++ pkg_include_dirs)
807 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
808 let pic_c_flags = picCCOpts dflags
810 let verb = getVerbFlag dflags
812 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
814 let split_objs = dopt Opt_SplitObjs dflags
815 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
818 let excessPrecision = dopt Opt_ExcessPrecision dflags
820 let cc_opt | optLevel dflags >= 2 = "-O2"
825 let mangle = dopt Opt_DoAsmMangling dflags
827 | hcc && mangle = Mangle
829 output_fn <- get_output_fn next_phase maybe_loc
834 -- on x86 the floating point regs have greater precision
835 -- than a double, which leads to unpredictable results.
836 -- By default, we turn this off with -ffloat-store unless
837 -- the user specified -fexcess-precision.
838 (if excessPrecision then [] else [ "-ffloat-store" ]) ++
840 -- gcc's -fstrict-aliasing allows two accesses to memory
841 -- to be considered non-aliasing if they have different types.
842 -- This interacts badly with the C code we generate, which is
843 -- very weakly typed, being derived from C--.
844 ["-fno-strict-aliasing"]
848 SysTools.runCc dflags (
849 -- force the C compiler to interpret this file as C when
850 -- compiling .hc files, by adding the -x c option.
851 -- Also useful for plain .c files, just in case GHC saw a
853 [ SysTools.Option "-x", SysTools.Option "c"] ++
854 [ SysTools.FileOption "" input_fn
855 , SysTools.Option "-o"
856 , SysTools.FileOption "" output_fn
858 ++ map SysTools.Option (
867 ++ [ verb, "-S", "-Wimplicit", cc_opt ]
868 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
875 return (next_phase, dflags, maybe_loc, output_fn)
877 -- ToDo: postprocess the output from gcc
879 -----------------------------------------------------------------------------
882 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
883 = do let mangler_opts = getOpts dflags opt_m
886 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
888 machdep_opts <- return []
891 let split = dopt Opt_SplitObjs dflags
893 | split = SplitMangle
895 output_fn <- get_output_fn next_phase maybe_loc
897 SysTools.runMangle dflags (map SysTools.Option mangler_opts
898 ++ [ SysTools.FileOption "" input_fn
899 , SysTools.FileOption "" output_fn
901 ++ map SysTools.Option machdep_opts)
903 return (next_phase, dflags, maybe_loc, output_fn)
905 -----------------------------------------------------------------------------
908 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
909 = do -- tmp_pfx is the prefix used for the split .s files
910 -- We also use it as the file to contain the no. of split .s files (sigh)
911 split_s_prefix <- SysTools.newTempName dflags "split"
912 let n_files_fn = split_s_prefix
914 SysTools.runSplit dflags
915 [ SysTools.FileOption "" input_fn
916 , SysTools.FileOption "" split_s_prefix
917 , SysTools.FileOption "" n_files_fn
920 -- Save the number of split files for future references
921 s <- readFile n_files_fn
922 let n_files = read s :: Int
923 writeIORef v_Split_info (split_s_prefix, n_files)
925 -- Remember to delete all these files
926 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
929 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
930 -- we don't use the filename
932 -----------------------------------------------------------------------------
935 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
936 = do let as_opts = getOpts dflags opt_a
937 let cmdline_include_paths = includePaths dflags
939 output_fn <- get_output_fn StopLn maybe_loc
941 -- we create directories for the object file, because it
942 -- might be a hierarchical module.
943 createDirectoryHierarchy (directoryOf output_fn)
945 SysTools.runAs dflags
946 (map SysTools.Option as_opts
947 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
948 ++ [ SysTools.Option "-c"
949 , SysTools.FileOption "" input_fn
950 , SysTools.Option "-o"
951 , SysTools.FileOption "" output_fn
954 return (StopLn, dflags, maybe_loc, output_fn)
957 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
959 output_fn <- get_output_fn StopLn maybe_loc
961 let (base_o, _) = splitFilename output_fn
962 split_odir = base_o ++ "_split"
963 osuf = objectSuf dflags
965 createDirectoryHierarchy split_odir
967 -- remove M_split/ *.o, because we're going to archive M_split/ *.o
968 -- later and we don't want to pick up any old objects.
969 fs <- getDirectoryContents split_odir
970 mapM_ removeFile $ map (split_odir `joinFileName`)
971 $ filter (osuf `isSuffixOf`) fs
973 let as_opts = getOpts dflags opt_a
975 (split_s_prefix, n) <- readIORef v_Split_info
977 let split_s n = split_s_prefix ++ "__" ++ show n `joinFileExt` "s"
978 split_obj n = split_odir `joinFileName`
979 filenameOf base_o ++ "__" ++ show n
983 = SysTools.runAs dflags
984 (map SysTools.Option as_opts ++
985 [ SysTools.Option "-c"
986 , SysTools.Option "-o"
987 , SysTools.FileOption "" (split_obj n)
988 , SysTools.FileOption "" (split_s n)
991 mapM_ assemble_file [1..n]
993 -- and join the split objects into a single object file:
994 let ld_r args = SysTools.runLink dflags ([
995 SysTools.Option "-nostdlib",
996 SysTools.Option "-nodefaultlibs",
997 SysTools.Option "-Wl,-r",
998 SysTools.Option ld_x_flag,
999 SysTools.Option "-o",
1000 SysTools.FileOption "" output_fn ] ++ args)
1001 ld_x_flag | null cLD_X = ""
1002 | otherwise = "-Wl,-x"
1004 if cLdIsGNULd == "YES"
1006 let script = split_odir `joinFileName` "ld.script"
1008 "INPUT(" ++ unwords (map split_obj [1..n]) ++ ")"
1009 ld_r [SysTools.FileOption "" script]
1011 ld_r (map (SysTools.FileOption "" . split_obj) [1..n])
1013 return (StopLn, dflags, maybe_loc, output_fn)
1016 -----------------------------------------------------------------------------
1017 -- MoveBinary sort-of-phase
1018 -- After having produced a binary, move it somewhere else and generate a
1019 -- wrapper script calling the binary. Currently, we need this only in
1020 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
1021 -- central directory.
1022 -- This is called from staticLink below, after linking. I haven't made it
1023 -- a separate phase to minimise interfering with other modules, and
1024 -- we don't need the generality of a phase (MoveBinary is always
1025 -- done after linking and makes only sense in a parallel setup) -- HWL
1027 runPhase_MoveBinary input_fn
1030 pvm_root <- getEnv "PVM_ROOT"
1031 pvm_arch <- getEnv "PVM_ARCH"
1033 pvm_executable_base = "=" ++ input_fn
1034 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
1035 -- nuke old binary; maybe use configur'ed names for cp and rm?
1036 system ("rm -f " ++ pvm_executable)
1037 -- move the newly created binary into PVM land
1038 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
1039 -- generate a wrapper script for running a parallel prg under PVM
1040 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
1043 -- generates a Perl skript starting a parallel prg under PVM
1044 mk_pvm_wrapper_script :: String -> String -> String -> String
1045 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
1047 "eval 'exec perl -S $0 ${1+\"$@\"}'",
1048 " if $running_under_some_shell;",
1049 "# =!=!=!=!=!=!=!=!=!=!=!",
1050 "# This script is automatically generated: DO NOT EDIT!!!",
1051 "# Generated by Glasgow Haskell Compiler",
1052 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
1054 "$pvm_executable = '" ++ pvm_executable ++ "';",
1055 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
1056 "$SysMan = '" ++ sysMan ++ "';",
1058 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
1059 "# first, some magical shortcuts to run "commands" on the binary",
1060 "# (which is hidden)",
1061 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1062 " local($cmd) = $1;",
1063 " system("$cmd $pvm_executable");",
1064 " exit(0); # all done",
1067 "# Now, run the real binary; process the args first",
1068 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1070 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1071 "@nonPVM_args = ();",
1072 "$in_RTS_args = 0;",
1074 "args: while ($a = shift(@ARGV)) {",
1075 " if ( $a eq '+RTS' ) {",
1076 " $in_RTS_args = 1;",
1077 " } elsif ( $a eq '-RTS' ) {",
1078 " $in_RTS_args = 0;",
1080 " if ( $a eq '-d' && $in_RTS_args ) {",
1082 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1083 " $nprocessors = $1;",
1084 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1085 " $nprocessors = $1;",
1087 " push(@nonPVM_args, $a);",
1091 "local($return_val) = 0;",
1092 "# Start the parallel execution by calling SysMan",
1093 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1094 "$return_val = $?;",
1095 "# ToDo: fix race condition moving files and flushing them!!",
1096 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1097 "exit($return_val);"
1100 -----------------------------------------------------------------------------
1101 -- Complain about non-dynamic flags in OPTIONS pragmas
1103 checkProcessArgsResult flags filename
1104 = do when (notNull flags) (throwDyn (ProgramError (
1105 showSDoc (hang (text filename <> char ':')
1106 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1107 hsep (map text flags)))
1110 -----------------------------------------------------------------------------
1111 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1113 getHCFilePackages :: FilePath -> IO [PackageId]
1114 getHCFilePackages filename =
1115 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1118 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1119 return (map stringToPackageId (words rest))
1123 -----------------------------------------------------------------------------
1124 -- Static linking, of .o files
1126 -- The list of packages passed to link is the list of packages on
1127 -- which this program depends, as discovered by the compilation
1128 -- manager. It is combined with the list of packages that the user
1129 -- specifies on the command line with -package flags.
1131 -- In one-shot linking mode, we can't discover the package
1132 -- dependencies (because we haven't actually done any compilation or
1133 -- read any interface files), so the user must explicitly specify all
1136 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1137 staticLink dflags o_files dep_packages = do
1138 let verb = getVerbFlag dflags
1139 output_fn = exeFileName dflags
1141 -- get the full list of packages to link with, by combining the
1142 -- explicit packages with the auto packages and all of their
1143 -- dependencies, and eliminating duplicates.
1145 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1146 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1148 let lib_paths = libraryPaths dflags
1149 let lib_path_opts = map ("-L"++) lib_paths
1151 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1153 #ifdef darwin_TARGET_OS
1154 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1155 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1157 let framework_paths = frameworkPaths dflags
1158 framework_path_opts = map ("-F"++) framework_paths
1160 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1161 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1163 let frameworks = cmdlineFrameworks dflags
1164 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1165 -- reverse because they're added in reverse order from the cmd line
1168 -- probably _stub.o files
1169 extra_ld_inputs <- readIORef v_Ld_inputs
1171 -- opts from -optl-<blah> (including -l<blah> options)
1172 let extra_ld_opts = getOpts dflags opt_l
1174 let ways = wayNames dflags
1176 -- Here are some libs that need to be linked at the *end* of
1177 -- the command line, because they contain symbols that are referred to
1178 -- by the RTS. We can't therefore use the ordinary way opts for these.
1180 debug_opts | WayDebug `elem` ways = [
1181 #if defined(HAVE_LIBBFD)
1188 thread_opts | WayThreaded `elem` ways = [
1189 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1192 #if defined(osf3_TARGET_OS)
1198 let (md_c_flags, _) = machdepCCOpts dflags
1199 SysTools.runLink dflags (
1200 [ SysTools.Option verb
1201 , SysTools.Option "-o"
1202 , SysTools.FileOption "" output_fn
1204 ++ map SysTools.Option (
1210 #ifdef darwin_TARGET_OS
1211 ++ framework_path_opts
1214 ++ pkg_lib_path_opts
1216 #ifdef darwin_TARGET_OS
1217 ++ pkg_framework_path_opts
1218 ++ pkg_framework_opts
1224 -- parallel only: move binary to another dir -- HWL
1225 when (WayPar `elem` ways)
1226 (do success <- runPhase_MoveBinary output_fn
1227 if success then return ()
1228 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1231 exeFileName :: DynFlags -> FilePath
1233 | Just s <- outputFile dflags =
1234 #if defined(mingw32_HOST_OS)
1235 if null (suffixOf s)
1236 then s `joinFileExt` "exe"
1242 #if defined(mingw32_HOST_OS)
1248 -----------------------------------------------------------------------------
1249 -- Making a DLL (only for Win32)
1251 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1252 doMkDLL dflags o_files dep_packages = do
1253 let verb = getVerbFlag dflags
1254 let static = opt_Static
1255 let no_hs_main = dopt Opt_NoHsMain dflags
1256 let o_file = outputFile dflags
1257 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1259 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1260 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1262 let lib_paths = libraryPaths dflags
1263 let lib_path_opts = map ("-L"++) lib_paths
1265 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1267 -- probably _stub.o files
1268 extra_ld_inputs <- readIORef v_Ld_inputs
1270 -- opts from -optdll-<blah>
1271 let extra_ld_opts = getOpts dflags opt_dll
1273 let pstate = pkgState dflags
1274 rts_id | ExtPackage id <- rtsPackageId pstate = id
1275 | otherwise = panic "staticLink: rts package missing"
1276 base_id | ExtPackage id <- basePackageId pstate = id
1277 | otherwise = panic "staticLink: base package missing"
1278 rts_pkg = getPackageDetails pstate rts_id
1279 base_pkg = getPackageDetails pstate base_id
1281 let extra_os = if static || no_hs_main
1283 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1284 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1286 let (md_c_flags, _) = machdepCCOpts dflags
1287 SysTools.runMkDLL dflags
1288 ([ SysTools.Option verb
1289 , SysTools.Option "-o"
1290 , SysTools.FileOption "" output_fn
1292 ++ map SysTools.Option (
1296 ++ [ "--target=i386-mingw32" ]
1300 ++ pkg_lib_path_opts
1302 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1304 else [ "--export-all" ])
1307 -- -----------------------------------------------------------------------------
1310 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1311 doCpp dflags raw include_cc_opts input_fn output_fn = do
1312 let hscpp_opts = getOpts dflags opt_P
1313 let cmdline_include_paths = includePaths dflags
1315 pkg_include_dirs <- getPackageIncludePath dflags []
1316 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1317 (cmdline_include_paths ++ pkg_include_dirs)
1319 let verb = getVerbFlag dflags
1322 | not include_cc_opts = []
1323 | otherwise = (optc ++ md_c_flags)
1325 optc = getOpts dflags opt_c
1326 (md_c_flags, _) = machdepCCOpts dflags
1328 let cpp_prog args | raw = SysTools.runCpp dflags args
1329 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1332 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1333 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1334 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1335 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1336 -- remember, in code we *compile*, the HOST is the same our TARGET,
1337 -- and BUILD is the same as our HOST.
1339 cpp_prog ([SysTools.Option verb]
1340 ++ map SysTools.Option include_paths
1341 ++ map SysTools.Option hsSourceCppOpts
1342 ++ map SysTools.Option hscpp_opts
1343 ++ map SysTools.Option cc_opts
1344 ++ map SysTools.Option target_defs
1345 ++ [ SysTools.Option "-x"
1346 , SysTools.Option "c"
1347 , SysTools.Option input_fn
1348 -- We hackily use Option instead of FileOption here, so that the file
1349 -- name is not back-slashed on Windows. cpp is capable of
1350 -- dealing with / in filenames, so it works fine. Furthermore
1351 -- if we put in backslashes, cpp outputs #line directives
1352 -- with *double* backslashes. And that in turn means that
1353 -- our error messages get double backslashes in them.
1354 -- In due course we should arrange that the lexer deals
1355 -- with these \\ escapes properly.
1356 , SysTools.Option "-o"
1357 , SysTools.FileOption "" output_fn
1360 cHaskell1Version = "5" -- i.e., Haskell 98
1362 -- Default CPP defines in Haskell source
1364 [ "-D__HASKELL1__="++cHaskell1Version
1365 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1367 , "-D__CONCURRENT_HASKELL__"
1371 -- -----------------------------------------------------------------------------
1374 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1375 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1376 hscNextPhase dflags other hsc_lang =
1379 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1381 HscNothing -> StopLn
1382 HscInterpreted -> StopLn
1386 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1387 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1388 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1389 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1392 keep_hc = dopt Opt_KeepHcFiles dflags
1394 -- don't change the lang if we're interpreting
1395 | current_hsc_lang == HscInterpreted = current_hsc_lang
1397 -- force -fvia-C if we are being asked for a .hc file
1398 | HCc <- stop = HscC
1400 -- otherwise, stick to the plan
1401 | otherwise = current_hsc_lang
1403 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1404 -- The split prefix and number of files