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
28 #include "HsVersions.h"
33 import SysTools ( newTempName, addFilesToClean, getSysMan, copy )
34 import qualified SysTools
42 import StaticFlags ( v_Ld_inputs, opt_Static, WayName(..) )
44 import RdrName ( GlobalRdrEnv )
47 import StringBuffer ( hGetStringBuffer )
48 import BasicTypes ( SuccessFlag(..) )
49 import Maybes ( expectJust )
50 import Ctype ( is_ident )
51 import StringBuffer ( StringBuffer(..), lexemeToString )
52 import ParserCoreUtils ( getCoreModuleName )
55 import DATA_IOREF ( readIORef, writeIORef, IORef )
56 import GLAEXTS ( Int(..) )
65 -- ---------------------------------------------------------------------------
68 -- Just preprocess a file, put the result in a temp. file (used by the
69 -- compilation manager during the summary phase).
71 -- We return the augmented DynFlags, because they contain the result
72 -- of slurping in the OPTIONS pragmas
74 preprocess :: DynFlags -> FilePath -> IO (DynFlags, FilePath)
75 preprocess dflags filename =
76 ASSERT2(isHaskellSrcFilename filename, text filename)
77 runPipeline anyHsc dflags filename Temporary Nothing{-no ModLocation-}
79 -- ---------------------------------------------------------------------------
82 -- Compile a single module, under the control of the compilation manager.
84 -- This is the interface between the compilation manager and the
85 -- compiler proper (hsc), where we deal with tedious details like
86 -- reading the OPTIONS pragma from the source file, and passing the
87 -- output of hsc through the C compiler.
89 -- NB. No old interface can also mean that the source has changed.
93 -> Maybe Linkable -- Just linkable <=> source unchanged
94 -> Maybe ModIface -- Old interface, if available
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 = do
107 let dflags0 = hsc_dflags hsc_env
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 verb = verbosity dflags0
118 let location = ms_location mod_summary
119 let input_fn = expectJust "compile:hs" (ml_hs_file location)
120 let input_fnpp = expectJust "compile:hspp" (ms_hspp_file mod_summary)
122 when (verb >= 2) (putMsg ("compile: input file " ++ input_fnpp))
124 -- Add in the OPTIONS from the source file
125 -- This is nasty: we've done this once already, in the compilation manager
126 -- It might be better to cache the flags in the ml_hspp_file field,say
127 let hspp_buf = expectJust "compile:hspp_buf" (ms_hspp_buf mod_summary)
128 opts = getOptionsFromStringBuffer hspp_buf
129 (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 opts
130 checkProcessArgsResult unhandled_flags input_fn
132 let (basename, _) = splitFilename input_fn
134 -- We add the directory in which the .hs files resides) to the import path.
135 -- This is needed when we try to compile the .hc file later, if it
136 -- imports a _stub.h file that we created here.
137 let current_dir = directoryOf basename
138 old_paths = includePaths dflags1
139 dflags = dflags1 { includePaths = current_dir : old_paths }
141 -- Figure out what lang we're generating
142 let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags)
143 -- ... and what the next phase should be
144 let next_phase = hscNextPhase dflags src_flavour hsc_lang
145 -- ... and what file to generate the output into
146 output_fn <- getOutputFilename dflags next_phase
147 Temporary basename next_phase (Just location)
149 let dflags' = dflags { hscTarget = hsc_lang,
150 hscOutName = output_fn,
151 hscStubCOutName = basename ++ "_stub.c",
152 hscStubHOutName = basename ++ "_stub.h",
153 extCoreName = basename ++ ".hcr" }
155 -- -no-recomp should also work with --make
156 let do_recomp = dopt Opt_RecompChecking dflags
157 source_unchanged = isJust maybe_old_linkable && do_recomp
158 hsc_env' = hsc_env { hsc_dflags = dflags' }
161 hsc_result <- hscMain hsc_env' printErrorsAndWarnings mod_summary
162 source_unchanged have_object old_iface
165 HscFail -> return CompErrs
167 HscNoRecomp details iface ->
168 ASSERT(isJust maybe_old_linkable)
169 return (CompOK details iface maybe_old_linkable)
171 HscRecomp details iface
172 stub_h_exists stub_c_exists maybe_interpreted_code
174 | isHsBoot src_flavour -- No further compilation to do
175 -> return (CompOK details iface Nothing)
177 | otherwise -- Normal Haskell source files
179 maybe_stub_o <- compileStub dflags' stub_c_exists
180 let stub_unlinked = case maybe_stub_o of
182 Just stub_o -> [ DotO stub_o ]
184 (hs_unlinked, unlinked_time) <-
187 -- in interpreted mode, just return the compiled code
188 -- as our "unlinked" object.
190 case maybe_interpreted_code of
192 Just comp_bc -> return ([BCOs comp_bc], ms_hs_date mod_summary)
193 -- Why do we use the timestamp of the source file here,
194 -- rather than the current time? This works better in
195 -- the case where the local clock is out of sync
196 -- with the filesystem's clock. It's just as accurate:
197 -- if the source is modified, then the linkable will
200 Nothing -> panic "compile: no interpreted code"
202 -- we're in batch mode: finish the compilation pipeline.
204 let object_filename = ml_obj_file location
206 runPipeline StopLn dflags output_fn Persistent
208 -- the object filename comes from the ModLocation
210 o_time <- getModificationTime object_filename
211 return ([DotO object_filename], o_time)
213 let linkable = LM unlinked_time this_mod
214 (hs_unlinked ++ stub_unlinked)
216 return (CompOK details iface (Just linkable))
218 -----------------------------------------------------------------------------
219 -- stub .h and .c files (for foreign export support)
221 compileStub dflags stub_c_exists
222 | not stub_c_exists = return Nothing
224 -- compile the _stub.c file w/ gcc
225 let stub_c = hscStubCOutName dflags
226 (_, stub_o) <- runPipeline StopLn dflags
227 stub_c Persistent Nothing{-no ModLocation-}
231 -- ---------------------------------------------------------------------------
234 link :: GhcMode -- interactive or batch
235 -> DynFlags -- dynamic flags
236 -> Bool -- attempt linking in batch mode?
237 -> HomePackageTable -- what to link
240 -- For the moment, in the batch linker, we don't bother to tell doLink
241 -- which packages to link -- it just tries all that are available.
242 -- batch_attempt_linking should only be *looked at* in batch mode. It
243 -- should only be True if the upsweep was successful and someone
244 -- exports main, i.e., we have good reason to believe that linking
248 link Interactive dflags batch_attempt_linking hpt
249 = do -- Not Linking...(demand linker will do the job)
253 link JustTypecheck dflags batch_attempt_linking hpt
256 link BatchCompile dflags batch_attempt_linking hpt
257 | batch_attempt_linking
260 home_mod_infos = moduleEnvElts hpt
262 -- the packages we depend on
263 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
265 -- the linkables to link
266 linkables = map (fromJust.hm_linkable) home_mod_infos
268 when (verb >= 3) $ do
269 hPutStrLn stderr "link: linkables are ..."
270 hPutStrLn stderr (showSDoc (vcat (map ppr linkables)))
272 -- check for the -no-link flag
273 if isNoLink (ghcLink dflags)
274 then do when (verb >= 3) $
275 hPutStrLn stderr "link(batch): linking omitted (-c flag given)."
280 hPutStrLn stderr "Linking ..."
282 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
283 obj_files = concatMap getOfiles linkables
285 -- Don't showPass in Batch mode; doLink will do that for us.
286 staticLink dflags obj_files pkg_deps
288 when (verb >= 3) (hPutStrLn stderr "link: done")
290 -- staticLink only returns if it succeeds
294 = do when (verb >= 3) $ do
295 hPutStrLn stderr "link(batch): upsweep (partially) failed OR"
296 hPutStrLn stderr " Main.main not exported; not linking."
299 verb = verbosity dflags
302 -- -----------------------------------------------------------------------------
303 -- Compile files in one-shot mode.
305 oneShot :: DynFlags -> Phase -> [String] -> IO ()
306 oneShot dflags stop_phase srcs = do
307 o_files <- mapM (compileFile dflags stop_phase) srcs
308 doLink dflags stop_phase o_files
310 compileFile :: DynFlags -> Phase -> FilePath -> IO FilePath
311 compileFile dflags stop_phase src = do
312 exists <- doesFileExist src
314 throwDyn (CmdLineError ("does not exist: " ++ src))
317 split = dopt Opt_SplitObjs dflags
318 mb_o_file = outputFile dflags
319 ghc_link = ghcLink dflags -- Set by -c or -no-link
321 -- When linking, the -o argument refers to the linker's output.
322 -- otherwise, we use it as the name for the pipeline's output.
324 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
325 -- -o foo applies to linker
326 | Just o_file <- mb_o_file = SpecificFile o_file
327 -- -o foo applies to the file we are compiling now
328 | otherwise = Persistent
330 stop_phase' = case stop_phase of
331 As | split -> SplitAs
334 (_, out_file) <- runPipeline stop_phase' dflags
335 src output Nothing{-no ModLocation-}
339 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
340 doLink dflags stop_phase o_files
341 | not (isStopLn stop_phase)
342 = return () -- We stopped before the linking phase
345 = case ghcLink dflags of
347 StaticLink -> staticLink dflags o_files link_pkgs
348 MkDLL -> doMkDLL dflags o_files link_pkgs
350 -- Always link in the haskell98 package for static linking. Other
351 -- packages have to be specified via the -package flag.
353 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
357 -- ---------------------------------------------------------------------------
358 -- Run a compilation pipeline, consisting of multiple phases.
360 -- This is the interface to the compilation pipeline, which runs
361 -- a series of compilation steps on a single source file, specifying
362 -- at which stage to stop.
364 -- The DynFlags can be modified by phases in the pipeline (eg. by
365 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
370 -- output should be to a temporary file: we're going to
371 -- run more compilation steps on this output later
373 -- we want a persistent file, i.e. a file in the current directory
374 -- derived from the input filename, but with the appropriate extension.
375 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
376 | SpecificFile FilePath
377 -- the output must go into the specified file.
380 :: Phase -- When to stop
381 -> DynFlags -- Dynamic flags
382 -> FilePath -- Input filename
383 -> PipelineOutput -- Output filename
384 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
385 -> IO (DynFlags, FilePath) -- (final flags, output filename)
387 runPipeline stop_phase dflags input_fn output maybe_loc
389 let (basename, suffix) = splitFilename input_fn
390 start_phase = startPhase suffix
392 -- We want to catch cases of "you can't get there from here" before
393 -- we start the pipeline, because otherwise it will just run off the
396 -- There is a partial ordering on phases, where A < B iff A occurs
397 -- before B in a normal compilation pipeline.
399 when (not (start_phase `happensBefore` stop_phase)) $
401 ("cannot compile this file to desired target: "
404 -- this is a function which will be used to calculate output file names
405 -- as we go along (we partially apply it to some of its inputs here)
406 let get_output_fn = getOutputFilename dflags stop_phase output basename
408 -- Execute the pipeline...
409 (dflags', output_fn, maybe_loc) <-
410 pipeLoop dflags start_phase stop_phase input_fn
411 basename suffix get_output_fn maybe_loc
413 -- Sometimes, a compilation phase doesn't actually generate any output
414 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
415 -- stage, but we wanted to keep the output, then we have to explicitly
419 return (dflags', output_fn)
421 do final_fn <- get_output_fn stop_phase maybe_loc
422 when (final_fn /= output_fn) $
423 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
424 ++ "'") output_fn final_fn
425 return (dflags', final_fn)
429 pipeLoop :: DynFlags -> Phase -> Phase
430 -> FilePath -> String -> Suffix
431 -> (Phase -> Maybe ModLocation -> IO FilePath)
433 -> IO (DynFlags, FilePath, Maybe ModLocation)
435 pipeLoop dflags phase stop_phase
436 input_fn orig_basename orig_suff
437 orig_get_output_fn maybe_loc
439 | phase `eqPhase` stop_phase -- All done
440 = return (dflags, input_fn, maybe_loc)
442 | not (phase `happensBefore` stop_phase)
443 -- Something has gone wrong. We'll try to cover all the cases when
444 -- this could happen, so if we reach here it is a panic.
445 -- eg. it might happen if the -C flag is used on a source file that
446 -- has {-# OPTIONS -fasm #-}.
447 = panic ("pipeLoop: at phase " ++ show phase ++
448 " but I wanted to stop at phase " ++ show stop_phase)
451 = do { (next_phase, dflags', maybe_loc, output_fn)
452 <- runPhase phase stop_phase dflags orig_basename
453 orig_suff input_fn orig_get_output_fn maybe_loc
454 ; pipeLoop dflags' next_phase stop_phase output_fn
455 orig_basename orig_suff orig_get_output_fn maybe_loc }
458 :: DynFlags -> Phase -> PipelineOutput -> String
459 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
460 getOutputFilename dflags stop_phase output basename
464 odir = outputDir dflags
465 osuf = objectSuf dflags
466 keep_hc = dopt Opt_KeepHcFiles dflags
467 keep_raw_s = dopt Opt_KeepRawSFiles dflags
468 keep_s = dopt Opt_KeepSFiles dflags
470 myPhaseInputExt HCc = hcsuf
471 myPhaseInputExt StopLn = osuf
472 myPhaseInputExt other = phaseInputExt other
474 func next_phase maybe_location
475 | is_last_phase, Persistent <- output = persistent_fn
476 | is_last_phase, SpecificFile f <- output = return f
477 | keep_this_output = persistent_fn
478 | otherwise = newTempName dflags suffix
480 is_last_phase = next_phase `eqPhase` stop_phase
482 -- sometimes, we keep output from intermediate stages
486 Mangle | keep_raw_s -> True
488 HCc | keep_hc -> True
491 suffix = myPhaseInputExt next_phase
493 -- persistent object files get put in odir
495 | StopLn <- next_phase = return odir_persistent
496 | otherwise = return persistent
498 persistent = basename ++ '.':suffix
501 | Just loc <- maybe_location = ml_obj_file loc
502 | Just d <- odir = replaceFilenameDirectory persistent d
503 | otherwise = persistent
506 -- -----------------------------------------------------------------------------
507 -- Each phase in the pipeline returns the next phase to execute, and the
508 -- name of the file in which the output was placed.
510 -- We must do things dynamically this way, because we often don't know
511 -- what the rest of the phases will be until part-way through the
512 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
513 -- of a source file can change the latter stages of the pipeline from
514 -- taking the via-C route to using the native code generator.
516 runPhase :: Phase -- Do this phase first
517 -> Phase -- Stop just before this phase
519 -> String -- basename of original input source
520 -> String -- its extension
521 -> FilePath -- name of file which contains the input to this phase.
522 -> (Phase -> Maybe ModLocation -> IO FilePath)
523 -- how to calculate the output filename
524 -> Maybe ModLocation -- the ModLocation, if we have one
525 -> IO (Phase, -- next phase
526 DynFlags, -- new dynamic flags
527 Maybe ModLocation, -- the ModLocation, if we have one
528 FilePath) -- output filename
530 -- Invariant: the output filename always contains the output
531 -- Interesting case: Hsc when there is no recompilation to do
532 -- Then the output filename is still a .o file
534 -------------------------------------------------------------------------------
537 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
538 = do let unlit_flags = getOpts dflags opt_L
539 -- The -h option passes the file name for unlit to put in a #line directive
540 output_fn <- get_output_fn (Cpp sf) maybe_loc
542 SysTools.runUnlit dflags
543 (map SysTools.Option unlit_flags ++
544 [ SysTools.Option "-h"
545 , SysTools.Option input_fn
546 , SysTools.FileOption "" input_fn
547 , SysTools.FileOption "" output_fn
550 return (Cpp sf, dflags, maybe_loc, output_fn)
552 -------------------------------------------------------------------------------
553 -- Cpp phase : (a) gets OPTIONS out of file
554 -- (b) runs cpp if necessary
556 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
557 = do src_opts <- getOptionsFromSource input_fn
558 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
559 checkProcessArgsResult unhandled_flags (basename++'.':suff)
561 if not (dopt Opt_Cpp dflags) then
562 -- no need to preprocess CPP, just pass input file along
563 -- to the next phase of the pipeline.
564 return (HsPp sf, dflags, maybe_loc, input_fn)
566 output_fn <- get_output_fn (HsPp sf) maybe_loc
567 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
568 return (HsPp sf, dflags, maybe_loc, output_fn)
570 -------------------------------------------------------------------------------
573 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
574 = do if not (dopt Opt_Pp dflags) then
575 -- no need to preprocess, just pass input file along
576 -- to the next phase of the pipeline.
577 return (Hsc sf, dflags, maybe_loc, input_fn)
579 let hspp_opts = getOpts dflags opt_F
580 let orig_fn = basename ++ '.':suff
581 output_fn <- get_output_fn (Hsc sf) maybe_loc
582 SysTools.runPp dflags
583 ( [ SysTools.Option orig_fn
584 , SysTools.Option input_fn
585 , SysTools.FileOption "" output_fn
587 map SysTools.Option hspp_opts
589 return (Hsc sf, dflags, maybe_loc, output_fn)
591 -----------------------------------------------------------------------------
594 -- Compilation of a single module, in "legacy" mode (_not_ under
595 -- the direction of the compilation manager).
596 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
597 = do -- normal Hsc mode, not mkdependHS
599 -- we add the current directory (i.e. the directory in which
600 -- the .hs files resides) to the import path, since this is
601 -- what gcc does, and it's probably what you want.
602 let current_dir = directoryOf basename
604 paths = includePaths dflags0
605 dflags = dflags0 { includePaths = current_dir : paths }
607 -- gather the imports and module name
608 (hspp_buf,mod_name) <-
610 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
611 ; m <- getCoreModuleName input_fn
612 ; return (Nothing, mkModule m) }
614 other -> do { buf <- hGetStringBuffer input_fn
615 ; (_,_,mod_name) <- getImports dflags buf input_fn
616 ; return (Just buf, mod_name) }
618 -- Build a ModLocation to pass to hscMain.
619 -- The source filename is rather irrelevant by now, but it's used
620 -- by hscMain for messages. hscMain also needs
621 -- the .hi and .o filenames, and this is as good a way
622 -- as any to generate them, and better than most. (e.g. takes
623 -- into accout the -osuf flags)
624 location1 <- mkHomeModLocation2 dflags mod_name basename suff
626 -- Boot-ify it if necessary
627 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
628 | otherwise = location1
631 -- Take -ohi into account if present
632 -- This can't be done in mkHomeModuleLocation because
633 -- it only applies to the module being compiles
634 let ohi = outputHi dflags
635 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
636 | otherwise = location2
638 -- Take -o into account if present
639 -- Very like -ohi, but we must *only* do this if we aren't linking
640 -- (If we're linking then the -o applies to the linked thing, not to
641 -- the object file for one module.)
642 -- Note the nasty duplication with the same computation in compileFile above
643 let expl_o_file = outputFile dflags
644 location4 | Just ofile <- expl_o_file
645 , isNoLink (ghcLink dflags)
646 = location3 { ml_obj_file = ofile }
647 | otherwise = location3
649 -- Make the ModSummary to hand to hscMain
650 src_timestamp <- getModificationTime (basename ++ '.':suff)
652 unused_field = panic "runPhase:ModSummary field"
653 -- Some fields are not looked at by hscMain
654 mod_summary = ModSummary { ms_mod = mod_name,
655 ms_hsc_src = src_flavour,
656 ms_hspp_file = Just input_fn,
657 ms_hspp_buf = hspp_buf,
658 ms_location = location4,
659 ms_hs_date = src_timestamp,
660 ms_obj_date = Nothing,
661 ms_imps = unused_field,
662 ms_srcimps = unused_field }
664 o_file = ml_obj_file location4 -- The real object file
667 -- Figure out if the source has changed, for recompilation avoidance.
669 -- Setting source_unchanged to True means that M.o seems
670 -- to be up to date wrt M.hs; so no need to recompile unless imports have
671 -- changed (which the compiler itself figures out).
672 -- Setting source_unchanged to False tells the compiler that M.o is out of
673 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
674 let do_recomp = dopt Opt_RecompChecking dflags
676 if not do_recomp || not (isStopLn stop)
677 -- Set source_unchanged to False unconditionally if
678 -- (a) recompilation checker is off, or
679 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
681 -- Otherwise look at file modification dates
682 else do o_file_exists <- doesFileExist o_file
684 then return False -- Need to recompile
685 else do t2 <- getModificationTime o_file
686 if t2 > src_timestamp
691 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
692 let next_phase = hscNextPhase dflags src_flavour hsc_lang
693 output_fn <- get_output_fn next_phase (Just location4)
695 let dflags' = dflags { hscTarget = hsc_lang,
696 hscOutName = output_fn,
697 hscStubCOutName = basename ++ "_stub.c",
698 hscStubHOutName = basename ++ "_stub.h",
699 extCoreName = basename ++ ".hcr" }
701 hsc_env <- newHscEnv dflags'
703 -- Tell the finder cache about this module
704 addHomeModuleToFinder hsc_env mod_name location4
707 result <- hscMain hsc_env printErrorsAndWarnings
708 mod_summary source_unchanged
709 False -- No object file
714 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
716 HscNoRecomp details iface -> do
717 SysTools.touch dflags' "Touching object file" o_file
718 return (StopLn, dflags', Just location4, o_file)
720 HscRecomp _details _iface
721 stub_h_exists stub_c_exists
722 _maybe_interpreted_code -> do
725 maybe_stub_o <- compileStub dflags' stub_c_exists
728 Just stub_o -> consIORef v_Ld_inputs stub_o
730 -- In the case of hs-boot files, generate a dummy .o-boot
731 -- stamp file for the benefit of Make
733 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
736 return (next_phase, dflags', Just location4, output_fn)
738 -----------------------------------------------------------------------------
741 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
743 output_fn <- get_output_fn Cmm maybe_loc
744 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
745 return (Cmm, dflags, maybe_loc, output_fn)
747 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
749 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
750 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
751 output_fn <- get_output_fn next_phase maybe_loc
753 let dflags' = dflags { hscTarget = hsc_lang,
754 hscOutName = output_fn,
755 hscStubCOutName = basename ++ "_stub.c",
756 hscStubHOutName = basename ++ "_stub.h",
757 extCoreName = basename ++ ".hcr" }
759 ok <- hscCmmFile dflags' input_fn
761 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
763 return (next_phase, dflags, maybe_loc, output_fn)
765 -----------------------------------------------------------------------------
768 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
769 -- way too many hacks, and I can't say I've ever used it anyway.
771 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
772 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
773 = do let cc_opts = getOpts dflags opt_c
774 hcc = cc_phase `eqPhase` HCc
776 let cmdline_include_paths = includePaths dflags
778 -- HC files have the dependent packages stamped into them
779 pkgs <- if hcc then getHCFilePackages input_fn else return []
781 -- add package include paths even if we're just compiling .c
782 -- files; this is the Value Add(TM) that using ghc instead of
784 pkg_include_dirs <- getPackageIncludePath dflags pkgs
785 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
786 (cmdline_include_paths ++ pkg_include_dirs)
788 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
789 let pic_c_flags = picCCOpts dflags
791 let verb = getVerbFlag dflags
793 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
795 let split_objs = dopt Opt_SplitObjs dflags
796 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
799 let excessPrecision = dopt Opt_ExcessPrecision dflags
803 let mangle = dopt Opt_DoAsmMangling dflags
805 | hcc && mangle = Mangle
807 output_fn <- get_output_fn next_phase maybe_loc
809 -- force the C compiler to interpret this file as C when
810 -- compiling .hc files, by adding the -x c option.
811 let langopt | hcc = [ SysTools.Option "-x", SysTools.Option "c"]
814 SysTools.runCc dflags (langopt ++
815 [ SysTools.FileOption "" input_fn
816 , SysTools.Option "-o"
817 , SysTools.FileOption "" output_fn
819 ++ map SysTools.Option (
825 ++ [ verb, "-S", "-Wimplicit", "-O" ]
826 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
829 ++ (if excessPrecision then [] else [ "-ffloat-store" ])
834 return (next_phase, dflags, maybe_loc, output_fn)
836 -- ToDo: postprocess the output from gcc
838 -----------------------------------------------------------------------------
841 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
842 = do let mangler_opts = getOpts dflags opt_m
845 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
847 machdep_opts <- return []
850 let split = dopt Opt_SplitObjs dflags
852 | split = SplitMangle
854 output_fn <- get_output_fn next_phase maybe_loc
856 SysTools.runMangle dflags (map SysTools.Option mangler_opts
857 ++ [ SysTools.FileOption "" input_fn
858 , SysTools.FileOption "" output_fn
860 ++ map SysTools.Option machdep_opts)
862 return (next_phase, dflags, maybe_loc, output_fn)
864 -----------------------------------------------------------------------------
867 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
868 = do -- tmp_pfx is the prefix used for the split .s files
869 -- We also use it as the file to contain the no. of split .s files (sigh)
870 split_s_prefix <- SysTools.newTempName dflags "split"
871 let n_files_fn = split_s_prefix
873 SysTools.runSplit dflags
874 [ SysTools.FileOption "" input_fn
875 , SysTools.FileOption "" split_s_prefix
876 , SysTools.FileOption "" n_files_fn
879 -- Save the number of split files for future references
880 s <- readFile n_files_fn
881 let n_files = read s :: Int
882 writeIORef v_Split_info (split_s_prefix, n_files)
884 -- Remember to delete all these files
885 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
888 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
889 -- we don't use the filename
891 -----------------------------------------------------------------------------
894 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
895 = do let as_opts = getOpts dflags opt_a
896 let cmdline_include_paths = includePaths dflags
898 output_fn <- get_output_fn StopLn maybe_loc
900 -- we create directories for the object file, because it
901 -- might be a hierarchical module.
902 createDirectoryHierarchy (directoryOf output_fn)
904 SysTools.runAs dflags
905 (map SysTools.Option as_opts
906 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
907 ++ [ SysTools.Option "-c"
908 , SysTools.FileOption "" input_fn
909 , SysTools.Option "-o"
910 , SysTools.FileOption "" output_fn
913 return (StopLn, dflags, maybe_loc, output_fn)
916 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
917 = do let as_opts = getOpts dflags opt_a
919 (split_s_prefix, n) <- readIORef v_Split_info
922 | Just d <- outputDir dflags = d
923 | otherwise = basename ++ "_split"
926 = do let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
927 let output_o = replaceFilenameDirectory
928 (basename ++ "__" ++ show n ++ ".o")
930 let osuf = objectSuf dflags
931 let real_o = replaceFilenameSuffix output_o osuf
932 SysTools.runAs dflags
933 (map SysTools.Option as_opts ++
934 [ SysTools.Option "-c"
935 , SysTools.Option "-o"
936 , SysTools.FileOption "" real_o
937 , SysTools.FileOption "" input_s
940 mapM_ assemble_file [1..n]
942 output_fn <- get_output_fn StopLn maybe_loc
943 return (StopLn, dflags, maybe_loc, output_fn)
945 -----------------------------------------------------------------------------
946 -- MoveBinary sort-of-phase
947 -- After having produced a binary, move it somewhere else and generate a
948 -- wrapper script calling the binary. Currently, we need this only in
949 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
950 -- central directory.
951 -- This is called from staticLink below, after linking. I haven't made it
952 -- a separate phase to minimise interfering with other modules, and
953 -- we don't need the generality of a phase (MoveBinary is always
954 -- done after linking and makes only sense in a parallel setup) -- HWL
956 runPhase_MoveBinary input_fn
959 pvm_root <- getEnv "PVM_ROOT"
960 pvm_arch <- getEnv "PVM_ARCH"
962 pvm_executable_base = "=" ++ input_fn
963 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
964 -- nuke old binary; maybe use configur'ed names for cp and rm?
965 system ("rm -f " ++ pvm_executable)
966 -- move the newly created binary into PVM land
967 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
968 -- generate a wrapper script for running a parallel prg under PVM
969 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
972 -- generates a Perl skript starting a parallel prg under PVM
973 mk_pvm_wrapper_script :: String -> String -> String -> String
974 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
976 "eval 'exec perl -S $0 ${1+\"$@\"}'",
977 " if $running_under_some_shell;",
978 "# =!=!=!=!=!=!=!=!=!=!=!",
979 "# This script is automatically generated: DO NOT EDIT!!!",
980 "# Generated by Glasgow Haskell Compiler",
981 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
983 "$pvm_executable = '" ++ pvm_executable ++ "';",
984 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
985 "$SysMan = '" ++ sysMan ++ "';",
987 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
988 "# first, some magical shortcuts to run "commands" on the binary",
989 "# (which is hidden)",
990 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
991 " local($cmd) = $1;",
992 " system("$cmd $pvm_executable");",
993 " exit(0); # all done",
996 "# Now, run the real binary; process the args first",
997 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
999 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1000 "@nonPVM_args = ();",
1001 "$in_RTS_args = 0;",
1003 "args: while ($a = shift(@ARGV)) {",
1004 " if ( $a eq '+RTS' ) {",
1005 " $in_RTS_args = 1;",
1006 " } elsif ( $a eq '-RTS' ) {",
1007 " $in_RTS_args = 0;",
1009 " if ( $a eq '-d' && $in_RTS_args ) {",
1011 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1012 " $nprocessors = $1;",
1013 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1014 " $nprocessors = $1;",
1016 " push(@nonPVM_args, $a);",
1020 "local($return_val) = 0;",
1021 "# Start the parallel execution by calling SysMan",
1022 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1023 "$return_val = $?;",
1024 "# ToDo: fix race condition moving files and flushing them!!",
1025 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1026 "exit($return_val);"
1029 -----------------------------------------------------------------------------
1030 -- Complain about non-dynamic flags in OPTIONS pragmas
1032 checkProcessArgsResult flags filename
1033 = do when (notNull flags) (throwDyn (ProgramError (
1034 showSDoc (hang (text filename <> char ':')
1035 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1036 hsep (map text flags)))
1039 -----------------------------------------------------------------------------
1040 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1042 getHCFilePackages :: FilePath -> IO [PackageId]
1043 getHCFilePackages filename =
1044 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1047 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1048 return (map stringToPackageId (words rest))
1052 -----------------------------------------------------------------------------
1053 -- Static linking, of .o files
1055 -- The list of packages passed to link is the list of packages on
1056 -- which this program depends, as discovered by the compilation
1057 -- manager. It is combined with the list of packages that the user
1058 -- specifies on the command line with -package flags.
1060 -- In one-shot linking mode, we can't discover the package
1061 -- dependencies (because we haven't actually done any compilation or
1062 -- read any interface files), so the user must explicitly specify all
1065 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1066 staticLink dflags o_files dep_packages = do
1067 let verb = getVerbFlag dflags
1069 -- get the full list of packages to link with, by combining the
1070 -- explicit packages with the auto packages and all of their
1071 -- dependencies, and eliminating duplicates.
1073 let o_file = outputFile dflags
1074 #if defined(mingw32_HOST_OS)
1075 let output_fn = case o_file of { Just s -> s; Nothing -> "main.exe"; }
1077 let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; }
1080 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1081 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1083 let lib_paths = libraryPaths dflags
1084 let lib_path_opts = map ("-L"++) lib_paths
1086 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1088 #ifdef darwin_TARGET_OS
1089 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1090 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1092 let framework_paths = frameworkPaths dflags
1093 framework_path_opts = map ("-F"++) framework_paths
1095 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1096 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1098 let frameworks = cmdlineFrameworks dflags
1099 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1100 -- reverse because they're added in reverse order from the cmd line
1103 -- probably _stub.o files
1104 extra_ld_inputs <- readIORef v_Ld_inputs
1106 -- opts from -optl-<blah> (including -l<blah> options)
1107 let extra_ld_opts = getOpts dflags opt_l
1109 let ways = wayNames dflags
1111 -- Here are some libs that need to be linked at the *end* of
1112 -- the command line, because they contain symbols that are referred to
1113 -- by the RTS. We can't therefore use the ordinary way opts for these.
1115 debug_opts | WayDebug `elem` ways = [
1116 #if defined(HAVE_LIBBFD)
1123 thread_opts | WayThreaded `elem` ways = [
1124 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1127 #if defined(osf3_TARGET_OS)
1133 let (md_c_flags, _) = machdepCCOpts dflags
1134 SysTools.runLink dflags (
1135 [ SysTools.Option verb
1136 , SysTools.Option "-o"
1137 , SysTools.FileOption "" output_fn
1139 ++ map SysTools.Option (
1145 #ifdef darwin_TARGET_OS
1146 ++ framework_path_opts
1149 ++ pkg_lib_path_opts
1151 #ifdef darwin_TARGET_OS
1152 ++ pkg_framework_path_opts
1153 ++ pkg_framework_opts
1159 -- parallel only: move binary to another dir -- HWL
1160 when (WayPar `elem` ways)
1161 (do success <- runPhase_MoveBinary output_fn
1162 if success then return ()
1163 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1165 -----------------------------------------------------------------------------
1166 -- Making a DLL (only for Win32)
1168 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1169 doMkDLL dflags o_files dep_packages = do
1170 let verb = getVerbFlag dflags
1171 let static = opt_Static
1172 let no_hs_main = dopt Opt_NoHsMain dflags
1173 let o_file = outputFile dflags
1174 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1176 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1177 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1179 let lib_paths = libraryPaths dflags
1180 let lib_path_opts = map ("-L"++) lib_paths
1182 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1184 -- probably _stub.o files
1185 extra_ld_inputs <- readIORef v_Ld_inputs
1187 -- opts from -optdll-<blah>
1188 let extra_ld_opts = getOpts dflags opt_dll
1190 let pstate = pkgState dflags
1191 rts_id | ExtPackage id <- rtsPackageId pstate = id
1192 | otherwise = panic "staticLink: rts package missing"
1193 base_id | ExtPackage id <- basePackageId pstate = id
1194 | otherwise = panic "staticLink: base package missing"
1195 rts_pkg = getPackageDetails pstate rts_id
1196 base_pkg = getPackageDetails pstate base_id
1198 let extra_os = if static || no_hs_main
1200 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1201 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1203 let (md_c_flags, _) = machdepCCOpts dflags
1204 SysTools.runMkDLL dflags
1205 ([ SysTools.Option verb
1206 , SysTools.Option "-o"
1207 , SysTools.FileOption "" output_fn
1209 ++ map SysTools.Option (
1213 ++ [ "--target=i386-mingw32" ]
1217 ++ pkg_lib_path_opts
1219 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1221 else [ "--export-all" ])
1224 -- -----------------------------------------------------------------------------
1227 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1228 doCpp dflags raw include_cc_opts input_fn output_fn = do
1229 let hscpp_opts = getOpts dflags opt_P
1230 let cmdline_include_paths = includePaths dflags
1232 pkg_include_dirs <- getPackageIncludePath dflags []
1233 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1234 (cmdline_include_paths ++ pkg_include_dirs)
1236 let verb = getVerbFlag dflags
1239 | not include_cc_opts = []
1240 | otherwise = (optc ++ md_c_flags)
1242 optc = getOpts dflags opt_c
1243 (md_c_flags, _) = machdepCCOpts dflags
1245 let cpp_prog args | raw = SysTools.runCpp dflags args
1246 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1249 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1250 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1251 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1252 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1253 -- remember, in code we *compile*, the HOST is the same our TARGET,
1254 -- and BUILD is the same as our HOST.
1256 cpp_prog ([SysTools.Option verb]
1257 ++ map SysTools.Option include_paths
1258 ++ map SysTools.Option hsSourceCppOpts
1259 ++ map SysTools.Option hscpp_opts
1260 ++ map SysTools.Option cc_opts
1261 ++ map SysTools.Option target_defs
1262 ++ [ SysTools.Option "-x"
1263 , SysTools.Option "c"
1264 , SysTools.Option input_fn
1265 -- We hackily use Option instead of FileOption here, so that the file
1266 -- name is not back-slashed on Windows. cpp is capable of
1267 -- dealing with / in filenames, so it works fine. Furthermore
1268 -- if we put in backslashes, cpp outputs #line directives
1269 -- with *double* backslashes. And that in turn means that
1270 -- our error messages get double backslashes in them.
1271 -- In due course we should arrange that the lexer deals
1272 -- with these \\ escapes properly.
1273 , SysTools.Option "-o"
1274 , SysTools.FileOption "" output_fn
1277 cHaskell1Version = "5" -- i.e., Haskell 98
1279 -- Default CPP defines in Haskell source
1281 [ "-D__HASKELL1__="++cHaskell1Version
1282 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1284 , "-D__CONCURRENT_HASKELL__"
1287 -----------------------------------------------------------------------------
1288 -- Reading OPTIONS pragmas
1290 getOptionsFromSource
1291 :: String -- input file
1292 -> IO [String] -- options, if any
1293 getOptionsFromSource file
1294 = do h <- openFile file ReadMode
1295 look h `finally` hClose h
1298 r <- tryJust ioErrors (hGetLine h)
1300 Left e | isEOFError e -> return []
1301 | otherwise -> ioError e
1303 let l = removeSpaces l'
1305 () | null l -> look h
1306 | prefixMatch "#" l -> look h
1307 | prefixMatch "{-# LINE" l -> look h -- -}
1308 | Just opts <- matchOptions l
1309 -> do rest <- look h
1310 return (opts ++ rest)
1311 | otherwise -> return []
1313 getOptionsFromStringBuffer :: StringBuffer -> [String]
1314 getOptionsFromStringBuffer buffer@(StringBuffer _ len# _) =
1316 ls = lines (lexemeToString buffer (I# len#)) -- lazy, so it's ok
1322 let l = removeSpaces l'
1324 () | null l -> look ls
1325 | prefixMatch "#" l -> look ls
1326 | prefixMatch "{-# LINE" l -> look ls -- -}
1327 | Just opts <- matchOptions l
1331 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1332 -- instead of OPTIONS_GHC, but that is deprecated.
1334 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1335 = matchOptions1 (removeSpaces s1)
1340 | Just s2 <- maybePrefixMatch "OPTIONS" s
1342 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1344 | not (is_ident (head s2))
1347 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1348 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1349 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1350 = Just ["-#include", removeSpaces (reverse s3)]
1351 | otherwise = Nothing
1353 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1354 | otherwise = Nothing
1357 -- -----------------------------------------------------------------------------
1360 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1361 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1362 hscNextPhase dflags other hsc_lang =
1365 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1367 HscNothing -> StopLn
1368 HscInterpreted -> StopLn
1372 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1373 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1374 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1375 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1378 keep_hc = dopt Opt_KeepHcFiles dflags
1380 -- don't change the lang if we're interpreting
1381 | current_hsc_lang == HscInterpreted = current_hsc_lang
1383 -- force -fvia-C if we are being asked for a .hc file
1384 | HCc <- stop = HscC
1386 -- otherwise, stick to the plan
1387 | otherwise = current_hsc_lang
1389 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1390 -- The split prefix and number of files