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(..) )
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 )
53 import SrcLoc ( srcLocSpan, mkSrcLoc )
54 import FastString ( mkFastString )
55 import Bag ( listToBag, emptyBag )
56 import SrcLoc ( Located(..) )
58 import Distribution.Compiler ( extensionsToGHCFlag )
61 import DATA_IOREF ( readIORef, writeIORef, IORef )
62 import GLAEXTS ( Int(..) )
68 import Data.List ( isSuffixOf )
72 -- ---------------------------------------------------------------------------
75 -- Just preprocess a file, put the result in a temp. file (used by the
76 -- compilation manager during the summary phase).
78 -- We return the augmented DynFlags, because they contain the result
79 -- of slurping in the OPTIONS pragmas
81 preprocess :: DynFlags -> (FilePath, Maybe Phase) -> IO (DynFlags, FilePath)
82 preprocess dflags (filename, mb_phase) =
83 ASSERT2(isJust mb_phase || isHaskellSrcFilename filename, text filename)
84 runPipeline anyHsc dflags (filename, mb_phase) Temporary Nothing{-no ModLocation-}
86 -- ---------------------------------------------------------------------------
89 -- Compile a single module, under the control of the compilation manager.
91 -- This is the interface between the compilation manager and the
92 -- compiler proper (hsc), where we deal with tedious details like
93 -- reading the OPTIONS pragma from the source file, and passing the
94 -- output of hsc through the C compiler.
96 -- NB. No old interface can also mean that the source has changed.
100 -> Maybe Linkable -- Just linkable <=> source unchanged
101 -> Maybe ModIface -- Old interface, if available
106 = CompOK ModDetails -- New details
107 ModIface -- New iface
108 (Maybe Linkable) -- a Maybe, for the same reasons as hm_linkable
113 compile hsc_env mod_summary maybe_old_linkable old_iface mod_index nmods = do
115 let dflags0 = hsc_dflags hsc_env
116 this_mod = ms_mod mod_summary
117 src_flavour = ms_hsc_src mod_summary
120 | Just l <- maybe_old_linkable, isObjectLinkable l = True
123 showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary)
125 let location = ms_location mod_summary
126 let input_fn = expectJust "compile:hs" (ml_hs_file location)
127 let input_fnpp = expectJust "compile:hspp" (ms_hspp_file mod_summary)
129 debugTraceMsg dflags0 2 (text "compile: input file" <+> text input_fnpp)
131 -- Add in the OPTIONS from the source file
132 -- This is nasty: we've done this once already, in the compilation manager
133 -- It might be better to cache the flags in the ml_hspp_file field,say
134 let hspp_buf = expectJust "compile:hspp_buf" (ms_hspp_buf mod_summary)
135 opts = getOptionsFromStringBuffer hspp_buf input_fn
136 (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 (map snd opts)
137 if (not (null unhandled_flags))
138 then do printErrorsAndWarnings dflags1 (optionsErrorMsgs unhandled_flags opts input_fn)
142 let (basename, _) = splitFilename input_fn
144 -- We add the directory in which the .hs files resides) to the import path.
145 -- This is needed when we try to compile the .hc file later, if it
146 -- imports a _stub.h file that we created here.
147 let current_dir = directoryOf basename
148 old_paths = includePaths dflags1
149 dflags = dflags1 { includePaths = current_dir : old_paths }
151 -- Figure out what lang we're generating
152 let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags)
153 -- ... and what the next phase should be
154 let next_phase = hscNextPhase dflags src_flavour hsc_lang
155 -- ... and what file to generate the output into
156 output_fn <- getOutputFilename dflags next_phase
157 Temporary basename next_phase (Just location)
159 let dflags' = dflags { hscTarget = hsc_lang,
160 hscOutName = output_fn,
161 extCoreName = basename ++ ".hcr" }
163 -- -no-recomp should also work with --make
164 let do_recomp = dopt Opt_RecompChecking dflags
165 source_unchanged = isJust maybe_old_linkable && do_recomp
166 hsc_env' = hsc_env { hsc_dflags = dflags' }
167 object_filename = ml_obj_file location
170 hsc_result <- hscMain hsc_env' mod_summary
171 source_unchanged have_object old_iface
172 (Just (mod_index, nmods))
175 HscFail -> return CompErrs
177 HscNoRecomp details iface ->
178 ASSERT(isJust maybe_old_linkable)
179 return (CompOK details iface maybe_old_linkable)
181 HscRecomp details iface stub_h_exists stub_c_exists maybe_interpreted_code
183 | isHsBoot src_flavour -- No further compilation to do
184 -> do case hsc_lang of
185 HscInterpreted -> return ()
186 _other -> SysTools.touch dflags' "Touching object file"
188 return (CompOK details iface Nothing)
190 | otherwise -- Normal source file
193 if stub_c_exists then do
194 stub_o <- compileStub dflags' this_mod location
195 return [ DotO stub_o ]
199 (hs_unlinked, unlinked_time) <-
202 -- in interpreted mode, just return the compiled code
203 -- as our "unlinked" object.
205 -> case maybe_interpreted_code of
207 Just comp_bc -> return ([BCOs comp_bc], ms_hs_date mod_summary)
208 -- Why do we use the timestamp of the source file here,
209 -- rather than the current time? This works better in
210 -- the case where the local clock is out of sync
211 -- with the filesystem's clock. It's just as accurate:
212 -- if the source is modified, then the linkable will
215 Nothing -> panic "compile: no interpreted code"
218 -> return ([], ms_hs_date mod_summary)
220 -- We're in --make mode: finish the compilation pipeline.
222 -> do runPipeline StopLn dflags (output_fn,Nothing) Persistent
224 -- The object filename comes from the ModLocation
226 o_time <- getModificationTime object_filename
227 return ([DotO object_filename], o_time)
229 let linkable = LM unlinked_time this_mod
230 (hs_unlinked ++ stub_unlinked)
232 return (CompOK details iface (Just linkable))
234 -----------------------------------------------------------------------------
235 -- stub .h and .c files (for foreign export support)
237 -- The _stub.c file is derived from the haskell source file, possibly taking
238 -- into account the -stubdir option.
240 -- Consequently, we derive the _stub.o filename from the haskell object
243 -- This isn't necessarily the same as the object filename we
244 -- would get if we just compiled the _stub.c file using the pipeline.
247 -- ghc src/A.hs -odir obj
249 -- results in obj/A.o, and src/A_stub.c. If we compile src/A_stub.c with
250 -- -odir obj, we would get obj/src/A_stub.o, which is wrong; we want
253 compileStub :: DynFlags -> Module -> ModLocation -> IO FilePath
254 compileStub dflags mod location = do
255 let (o_base, o_ext) = splitFilename (ml_obj_file location)
256 stub_o = o_base ++ "_stub" `joinFileExt` o_ext
258 -- compile the _stub.c file w/ gcc
259 let (stub_c,_) = mkStubPaths dflags mod location
260 runPipeline StopLn dflags (stub_c,Nothing)
261 (SpecificFile stub_o) Nothing{-no ModLocation-}
266 -- ---------------------------------------------------------------------------
269 link :: GhcMode -- interactive or batch
270 -> DynFlags -- dynamic flags
271 -> Bool -- attempt linking in batch mode?
272 -> HomePackageTable -- what to link
275 -- For the moment, in the batch linker, we don't bother to tell doLink
276 -- which packages to link -- it just tries all that are available.
277 -- batch_attempt_linking should only be *looked at* in batch mode. It
278 -- should only be True if the upsweep was successful and someone
279 -- exports main, i.e., we have good reason to believe that linking
283 link Interactive dflags batch_attempt_linking hpt
284 = do -- Not Linking...(demand linker will do the job)
288 link JustTypecheck dflags batch_attempt_linking hpt
291 link BatchCompile dflags batch_attempt_linking hpt
292 | batch_attempt_linking
295 home_mod_infos = moduleEnvElts hpt
297 -- the packages we depend on
298 pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos
300 -- the linkables to link
301 linkables = map (expectJust "link".hm_linkable) home_mod_infos
303 debugTraceMsg dflags 3 (text "link: linkables are ..." $$ vcat (map ppr linkables))
305 -- check for the -no-link flag
306 if isNoLink (ghcLink dflags)
307 then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).")
311 let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us)
312 obj_files = concatMap getOfiles linkables
314 exe_file = exeFileName dflags
316 -- if the modification time on the executable is later than the
317 -- modification times on all of the objects, then omit linking
318 -- (unless the -no-recomp flag was given).
319 e_exe_time <- IO.try $ getModificationTime exe_file
321 | Left _ <- e_exe_time = True
322 | Right t <- e_exe_time =
323 any (t <) (map linkableTime linkables)
325 if dopt Opt_RecompChecking dflags && not linking_needed
326 then do debugTraceMsg dflags 1 (text exe_file <+> ptext SLIT("is up to date, linking not required."))
330 debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file
333 -- Don't showPass in Batch mode; doLink will do that for us.
334 let link = case ghcLink dflags of
336 StaticLink -> staticLink
337 link dflags obj_files pkg_deps
339 debugTraceMsg dflags 3 (text "link: done")
341 -- staticLink only returns if it succeeds
345 = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$
346 text " Main.main not exported; not linking.")
350 -- -----------------------------------------------------------------------------
351 -- Compile files in one-shot mode.
353 oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO ()
354 oneShot dflags stop_phase srcs = do
355 o_files <- mapM (compileFile dflags stop_phase) srcs
356 doLink dflags stop_phase o_files
358 compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath
359 compileFile dflags stop_phase (src, mb_phase) = do
360 exists <- doesFileExist src
362 throwDyn (CmdLineError ("does not exist: " ++ src))
365 split = dopt Opt_SplitObjs dflags
366 mb_o_file = outputFile dflags
367 ghc_link = ghcLink dflags -- Set by -c or -no-link
369 -- When linking, the -o argument refers to the linker's output.
370 -- otherwise, we use it as the name for the pipeline's output.
372 | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent
373 -- -o foo applies to linker
374 | Just o_file <- mb_o_file = SpecificFile o_file
375 -- -o foo applies to the file we are compiling now
376 | otherwise = Persistent
378 stop_phase' = case stop_phase of
379 As | split -> SplitAs
382 (_, out_file) <- runPipeline stop_phase' dflags
383 (src, mb_phase) output Nothing{-no ModLocation-}
387 doLink :: DynFlags -> Phase -> [FilePath] -> IO ()
388 doLink dflags stop_phase o_files
389 | not (isStopLn stop_phase)
390 = return () -- We stopped before the linking phase
393 = case ghcLink dflags of
395 StaticLink -> staticLink dflags o_files link_pkgs
396 MkDLL -> doMkDLL dflags o_files link_pkgs
398 -- Always link in the haskell98 package for static linking. Other
399 -- packages have to be specified via the -package flag.
401 | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
405 -- ---------------------------------------------------------------------------
406 -- Run a compilation pipeline, consisting of multiple phases.
408 -- This is the interface to the compilation pipeline, which runs
409 -- a series of compilation steps on a single source file, specifying
410 -- at which stage to stop.
412 -- The DynFlags can be modified by phases in the pipeline (eg. by
413 -- GHC_OPTIONS pragmas), and the changes affect later phases in the
418 -- output should be to a temporary file: we're going to
419 -- run more compilation steps on this output later
421 -- we want a persistent file, i.e. a file in the current directory
422 -- derived from the input filename, but with the appropriate extension.
423 -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o.
424 | SpecificFile FilePath
425 -- the output must go into the specified file.
428 :: Phase -- When to stop
429 -> DynFlags -- Dynamic flags
430 -> (FilePath,Maybe Phase) -- Input filename (and maybe -x suffix)
431 -> PipelineOutput -- Output filename
432 -> Maybe ModLocation -- A ModLocation, if this is a Haskell module
433 -> IO (DynFlags, FilePath) -- (final flags, output filename)
435 runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc
437 let (basename, suffix) = splitFilename input_fn
439 -- If we were given a -x flag, then use that phase to start from
441 | Just x_phase <- mb_phase = x_phase
442 | otherwise = startPhase suffix
444 -- We want to catch cases of "you can't get there from here" before
445 -- we start the pipeline, because otherwise it will just run off the
448 -- There is a partial ordering on phases, where A < B iff A occurs
449 -- before B in a normal compilation pipeline.
451 when (not (start_phase `happensBefore` stop_phase)) $
453 ("cannot compile this file to desired target: "
456 -- this is a function which will be used to calculate output file names
457 -- as we go along (we partially apply it to some of its inputs here)
458 let get_output_fn = getOutputFilename dflags stop_phase output basename
460 -- Execute the pipeline...
461 (dflags', output_fn, maybe_loc) <-
462 pipeLoop dflags start_phase stop_phase input_fn
463 basename suffix get_output_fn maybe_loc
465 -- Sometimes, a compilation phase doesn't actually generate any output
466 -- (eg. the CPP phase when -fcpp is not turned on). If we end on this
467 -- stage, but we wanted to keep the output, then we have to explicitly
471 return (dflags', output_fn)
473 do final_fn <- get_output_fn stop_phase maybe_loc
474 when (final_fn /= output_fn) $
475 copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn
476 ++ "'") output_fn final_fn
477 return (dflags', final_fn)
481 pipeLoop :: DynFlags -> Phase -> Phase
482 -> FilePath -> String -> Suffix
483 -> (Phase -> Maybe ModLocation -> IO FilePath)
485 -> IO (DynFlags, FilePath, Maybe ModLocation)
487 pipeLoop dflags phase stop_phase
488 input_fn orig_basename orig_suff
489 orig_get_output_fn maybe_loc
491 | phase `eqPhase` stop_phase -- All done
492 = return (dflags, input_fn, maybe_loc)
494 | not (phase `happensBefore` stop_phase)
495 -- Something has gone wrong. We'll try to cover all the cases when
496 -- this could happen, so if we reach here it is a panic.
497 -- eg. it might happen if the -C flag is used on a source file that
498 -- has {-# OPTIONS -fasm #-}.
499 = panic ("pipeLoop: at phase " ++ show phase ++
500 " but I wanted to stop at phase " ++ show stop_phase)
503 = do { (next_phase, dflags', maybe_loc, output_fn)
504 <- runPhase phase stop_phase dflags orig_basename
505 orig_suff input_fn orig_get_output_fn maybe_loc
506 ; pipeLoop dflags' next_phase stop_phase output_fn
507 orig_basename orig_suff orig_get_output_fn maybe_loc }
510 :: DynFlags -> Phase -> PipelineOutput -> String
511 -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath
512 getOutputFilename dflags stop_phase output basename
516 odir = objectDir dflags
517 osuf = objectSuf dflags
518 keep_hc = dopt Opt_KeepHcFiles dflags
519 keep_raw_s = dopt Opt_KeepRawSFiles dflags
520 keep_s = dopt Opt_KeepSFiles dflags
522 myPhaseInputExt HCc = hcsuf
523 myPhaseInputExt StopLn = osuf
524 myPhaseInputExt other = phaseInputExt other
526 func next_phase maybe_location
527 | is_last_phase, Persistent <- output = persistent_fn
528 | is_last_phase, SpecificFile f <- output = return f
529 | keep_this_output = persistent_fn
530 | otherwise = newTempName dflags suffix
532 is_last_phase = next_phase `eqPhase` stop_phase
534 -- sometimes, we keep output from intermediate stages
538 Mangle | keep_raw_s -> True
540 HCc | keep_hc -> True
543 suffix = myPhaseInputExt next_phase
545 -- persistent object files get put in odir
547 | StopLn <- next_phase = return odir_persistent
548 | otherwise = return persistent
550 persistent = basename `joinFileExt` suffix
553 | Just loc <- maybe_location = ml_obj_file loc
554 | Just d <- odir = d `joinFileName` persistent
555 | otherwise = persistent
558 -- -----------------------------------------------------------------------------
559 -- Each phase in the pipeline returns the next phase to execute, and the
560 -- name of the file in which the output was placed.
562 -- We must do things dynamically this way, because we often don't know
563 -- what the rest of the phases will be until part-way through the
564 -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning
565 -- of a source file can change the latter stages of the pipeline from
566 -- taking the via-C route to using the native code generator.
568 runPhase :: Phase -- Do this phase first
569 -> Phase -- Stop just before this phase
571 -> String -- basename of original input source
572 -> String -- its extension
573 -> FilePath -- name of file which contains the input to this phase.
574 -> (Phase -> Maybe ModLocation -> IO FilePath)
575 -- how to calculate the output filename
576 -> Maybe ModLocation -- the ModLocation, if we have one
577 -> IO (Phase, -- next phase
578 DynFlags, -- new dynamic flags
579 Maybe ModLocation, -- the ModLocation, if we have one
580 FilePath) -- output filename
582 -- Invariant: the output filename always contains the output
583 -- Interesting case: Hsc when there is no recompilation to do
584 -- Then the output filename is still a .o file
586 -------------------------------------------------------------------------------
589 runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc
590 = do let unlit_flags = getOpts dflags opt_L
591 -- The -h option passes the file name for unlit to put in a #line directive
592 output_fn <- get_output_fn (Cpp sf) maybe_loc
594 SysTools.runUnlit dflags
595 (map SysTools.Option unlit_flags ++
596 [ SysTools.Option "-h"
597 , SysTools.Option input_fn
598 , SysTools.FileOption "" input_fn
599 , SysTools.FileOption "" output_fn
602 return (Cpp sf, dflags, maybe_loc, output_fn)
604 -------------------------------------------------------------------------------
605 -- Cpp phase : (a) gets OPTIONS out of file
606 -- (b) runs cpp if necessary
608 runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc
609 = do src_opts <- getOptionsFromSource input_fn
610 (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts
611 checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff)
613 if not (dopt Opt_Cpp dflags) then
614 -- no need to preprocess CPP, just pass input file along
615 -- to the next phase of the pipeline.
616 return (HsPp sf, dflags, maybe_loc, input_fn)
618 output_fn <- get_output_fn (HsPp sf) maybe_loc
619 doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn
620 return (HsPp sf, dflags, maybe_loc, output_fn)
622 -------------------------------------------------------------------------------
625 runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc
626 = do if not (dopt Opt_Pp dflags) then
627 -- no need to preprocess, just pass input file along
628 -- to the next phase of the pipeline.
629 return (Hsc sf, dflags, maybe_loc, input_fn)
631 let hspp_opts = getOpts dflags opt_F
632 let orig_fn = basename `joinFileExt` suff
633 output_fn <- get_output_fn (Hsc sf) maybe_loc
634 SysTools.runPp dflags
635 ( [ SysTools.Option orig_fn
636 , SysTools.Option input_fn
637 , SysTools.FileOption "" output_fn
639 map SysTools.Option hspp_opts
641 return (Hsc sf, dflags, maybe_loc, output_fn)
643 -----------------------------------------------------------------------------
646 -- Compilation of a single module, in "legacy" mode (_not_ under
647 -- the direction of the compilation manager).
648 runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc
649 = do -- normal Hsc mode, not mkdependHS
651 -- we add the current directory (i.e. the directory in which
652 -- the .hs files resides) to the import path, since this is
653 -- what gcc does, and it's probably what you want.
654 let current_dir = directoryOf basename
656 paths = includePaths dflags0
657 dflags = dflags0 { includePaths = current_dir : paths }
659 -- gather the imports and module name
660 (hspp_buf,mod_name) <-
662 ExtCoreFile -> do { -- no explicit imports in ExtCore input.
663 ; m <- getCoreModuleName input_fn
664 ; return (Nothing, mkModule m) }
666 other -> do { buf <- hGetStringBuffer input_fn
667 ; (_,_,L _ mod_name) <- getImports dflags buf input_fn
668 ; return (Just buf, mod_name) }
670 -- Build a ModLocation to pass to hscMain.
671 -- The source filename is rather irrelevant by now, but it's used
672 -- by hscMain for messages. hscMain also needs
673 -- the .hi and .o filenames, and this is as good a way
674 -- as any to generate them, and better than most. (e.g. takes
675 -- into accout the -osuf flags)
676 location1 <- mkHomeModLocation2 dflags mod_name basename suff
678 -- Boot-ify it if necessary
679 let location2 | isHsBoot src_flavour = addBootSuffixLocn location1
680 | otherwise = location1
683 -- Take -ohi into account if present
684 -- This can't be done in mkHomeModuleLocation because
685 -- it only applies to the module being compiles
686 let ohi = outputHi dflags
687 location3 | Just fn <- ohi = location2{ ml_hi_file = fn }
688 | otherwise = location2
690 -- Take -o into account if present
691 -- Very like -ohi, but we must *only* do this if we aren't linking
692 -- (If we're linking then the -o applies to the linked thing, not to
693 -- the object file for one module.)
694 -- Note the nasty duplication with the same computation in compileFile above
695 let expl_o_file = outputFile dflags
696 location4 | Just ofile <- expl_o_file
697 , isNoLink (ghcLink dflags)
698 = location3 { ml_obj_file = ofile }
699 | otherwise = location3
701 -- Make the ModSummary to hand to hscMain
702 src_timestamp <- getModificationTime (basename `joinFileExt` suff)
704 unused_field = panic "runPhase:ModSummary field"
705 -- Some fields are not looked at by hscMain
706 mod_summary = ModSummary { ms_mod = mod_name,
707 ms_hsc_src = src_flavour,
708 ms_hspp_file = Just input_fn,
709 ms_hspp_buf = hspp_buf,
710 ms_location = location4,
711 ms_hs_date = src_timestamp,
712 ms_obj_date = Nothing,
713 ms_imps = unused_field,
714 ms_srcimps = unused_field }
716 o_file = ml_obj_file location4 -- The real object file
719 -- Figure out if the source has changed, for recompilation avoidance.
721 -- Setting source_unchanged to True means that M.o seems
722 -- to be up to date wrt M.hs; so no need to recompile unless imports have
723 -- changed (which the compiler itself figures out).
724 -- Setting source_unchanged to False tells the compiler that M.o is out of
725 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
726 let do_recomp = dopt Opt_RecompChecking dflags
728 if not do_recomp || not (isStopLn stop)
729 -- Set source_unchanged to False unconditionally if
730 -- (a) recompilation checker is off, or
731 -- (b) we aren't going all the way to .o file (e.g. ghc -S)
733 -- Otherwise look at file modification dates
734 else do o_file_exists <- doesFileExist o_file
736 then return False -- Need to recompile
737 else do t2 <- getModificationTime o_file
738 if t2 > src_timestamp
743 let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags)
744 let next_phase = hscNextPhase dflags src_flavour hsc_lang
745 output_fn <- get_output_fn next_phase (Just location4)
747 let dflags' = dflags { hscTarget = hsc_lang,
748 hscOutName = output_fn,
749 extCoreName = basename ++ ".hcr" }
751 hsc_env <- newHscEnv dflags'
753 -- Tell the finder cache about this module
754 addHomeModuleToFinder hsc_env mod_name location4
757 result <- hscMain hsc_env
758 mod_summary source_unchanged
759 False -- No object file
761 Nothing -- No "module i of n" progress info
765 HscFail -> throwDyn (PhaseFailed "hsc" (ExitFailure 1))
767 HscNoRecomp details iface -> do
768 SysTools.touch dflags' "Touching object file" o_file
769 -- The .o file must have a later modification date
770 -- than the source file (else we wouldn't be in HscNoRecomp)
771 -- but we touch it anyway, to keep 'make' happy (we think).
772 return (StopLn, dflags', Just location4, o_file)
774 HscRecomp _details _iface
775 stub_h_exists stub_c_exists
776 _maybe_interpreted_code -> do
778 when stub_c_exists $ do
779 stub_o <- compileStub dflags' mod_name location4
780 consIORef v_Ld_inputs stub_o
782 -- In the case of hs-boot files, generate a dummy .o-boot
783 -- stamp file for the benefit of Make
785 HsBootFile -> SysTools.touch dflags' "Touching object file" o_file
788 return (next_phase, dflags', Just location4, output_fn)
790 -----------------------------------------------------------------------------
793 runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc
795 output_fn <- get_output_fn Cmm maybe_loc
796 doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn
797 return (Cmm, dflags, maybe_loc, output_fn)
799 runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc
801 let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags)
802 let next_phase = hscNextPhase dflags HsSrcFile hsc_lang
803 output_fn <- get_output_fn next_phase maybe_loc
805 let dflags' = dflags { hscTarget = hsc_lang,
806 hscOutName = output_fn,
807 extCoreName = basename ++ ".hcr" }
809 ok <- hscCmmFile dflags' input_fn
811 when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1))
813 return (next_phase, dflags, maybe_loc, output_fn)
815 -----------------------------------------------------------------------------
818 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
819 -- way too many hacks, and I can't say I've ever used it anyway.
821 runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc
822 | cc_phase `eqPhase` Cc || cc_phase `eqPhase` HCc
823 = do let cc_opts = getOpts dflags opt_c
824 hcc = cc_phase `eqPhase` HCc
826 let cmdline_include_paths = includePaths dflags
828 -- HC files have the dependent packages stamped into them
829 pkgs <- if hcc then getHCFilePackages input_fn else return []
831 -- add package include paths even if we're just compiling .c
832 -- files; this is the Value Add(TM) that using ghc instead of
834 pkg_include_dirs <- getPackageIncludePath dflags pkgs
835 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
836 (cmdline_include_paths ++ pkg_include_dirs)
838 let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags
839 let pic_c_flags = picCCOpts dflags
841 let verb = getVerbFlag dflags
843 pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs
845 let split_objs = dopt Opt_SplitObjs dflags
846 split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
849 let excessPrecision = dopt Opt_ExcessPrecision dflags
851 let cc_opt | optLevel dflags >= 2 = "-O2"
856 let mangle = dopt Opt_DoAsmMangling dflags
858 | hcc && mangle = Mangle
860 output_fn <- get_output_fn next_phase maybe_loc
865 -- on x86 the floating point regs have greater precision
866 -- than a double, which leads to unpredictable results.
867 -- By default, we turn this off with -ffloat-store unless
868 -- the user specified -fexcess-precision.
869 (if excessPrecision then [] else [ "-ffloat-store" ]) ++
871 -- gcc's -fstrict-aliasing allows two accesses to memory
872 -- to be considered non-aliasing if they have different types.
873 -- This interacts badly with the C code we generate, which is
874 -- very weakly typed, being derived from C--.
875 ["-fno-strict-aliasing"]
879 SysTools.runCc dflags (
880 -- force the C compiler to interpret this file as C when
881 -- compiling .hc files, by adding the -x c option.
882 -- Also useful for plain .c files, just in case GHC saw a
884 [ SysTools.Option "-x", SysTools.Option "c"] ++
885 [ SysTools.FileOption "" input_fn
886 , SysTools.Option "-o"
887 , SysTools.FileOption "" output_fn
889 ++ map SysTools.Option (
898 ++ [ verb, "-S", "-Wimplicit", cc_opt ]
899 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
906 return (next_phase, dflags, maybe_loc, output_fn)
908 -- ToDo: postprocess the output from gcc
910 -----------------------------------------------------------------------------
913 runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
914 = do let mangler_opts = getOpts dflags opt_m
917 machdep_opts <- return [ show (stolen_x86_regs dflags) ]
919 machdep_opts <- return []
922 let split = dopt Opt_SplitObjs dflags
924 | split = SplitMangle
926 output_fn <- get_output_fn next_phase maybe_loc
928 SysTools.runMangle dflags (map SysTools.Option mangler_opts
929 ++ [ SysTools.FileOption "" input_fn
930 , SysTools.FileOption "" output_fn
932 ++ map SysTools.Option machdep_opts)
934 return (next_phase, dflags, maybe_loc, output_fn)
936 -----------------------------------------------------------------------------
939 runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc
940 = do -- tmp_pfx is the prefix used for the split .s files
941 -- We also use it as the file to contain the no. of split .s files (sigh)
942 split_s_prefix <- SysTools.newTempName dflags "split"
943 let n_files_fn = split_s_prefix
945 SysTools.runSplit dflags
946 [ SysTools.FileOption "" input_fn
947 , SysTools.FileOption "" split_s_prefix
948 , SysTools.FileOption "" n_files_fn
951 -- Save the number of split files for future references
952 s <- readFile n_files_fn
953 let n_files = read s :: Int
954 writeIORef v_Split_info (split_s_prefix, n_files)
956 -- Remember to delete all these files
957 addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s"
960 return (SplitAs, dflags, maybe_loc, "**splitmangle**")
961 -- we don't use the filename
963 -----------------------------------------------------------------------------
966 runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc
967 = do let as_opts = getOpts dflags opt_a
968 let cmdline_include_paths = includePaths dflags
970 output_fn <- get_output_fn StopLn maybe_loc
972 -- we create directories for the object file, because it
973 -- might be a hierarchical module.
974 createDirectoryHierarchy (directoryOf output_fn)
976 SysTools.runAs dflags
977 (map SysTools.Option as_opts
978 ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ]
979 ++ [ SysTools.Option "-c"
980 , SysTools.FileOption "" input_fn
981 , SysTools.Option "-o"
982 , SysTools.FileOption "" output_fn
985 return (StopLn, dflags, maybe_loc, output_fn)
988 runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc
990 output_fn <- get_output_fn StopLn maybe_loc
992 let (base_o, _) = splitFilename output_fn
993 split_odir = base_o ++ "_split"
994 osuf = objectSuf dflags
996 createDirectoryHierarchy split_odir
998 -- remove M_split/ *.o, because we're going to archive M_split/ *.o
999 -- later and we don't want to pick up any old objects.
1000 fs <- getDirectoryContents split_odir
1001 mapM_ removeFile $ map (split_odir `joinFileName`)
1002 $ filter (osuf `isSuffixOf`) fs
1004 let as_opts = getOpts dflags opt_a
1006 (split_s_prefix, n) <- readIORef v_Split_info
1008 let split_s n = split_s_prefix ++ "__" ++ show n `joinFileExt` "s"
1009 split_obj n = split_odir `joinFileName`
1010 filenameOf base_o ++ "__" ++ show n
1014 = SysTools.runAs dflags
1015 (map SysTools.Option as_opts ++
1016 [ SysTools.Option "-c"
1017 , SysTools.Option "-o"
1018 , SysTools.FileOption "" (split_obj n)
1019 , SysTools.FileOption "" (split_s n)
1022 mapM_ assemble_file [1..n]
1024 -- and join the split objects into a single object file:
1025 let ld_r args = SysTools.runLink dflags ([
1026 SysTools.Option "-nostdlib",
1027 SysTools.Option "-nodefaultlibs",
1028 SysTools.Option "-Wl,-r",
1029 SysTools.Option ld_x_flag,
1030 SysTools.Option "-o",
1031 SysTools.FileOption "" output_fn ] ++ args)
1032 ld_x_flag | null cLD_X = ""
1033 | otherwise = "-Wl,-x"
1035 if cLdIsGNULd == "YES"
1037 let script = split_odir `joinFileName` "ld.script"
1039 "INPUT(" ++ unwords (map split_obj [1..n]) ++ ")"
1040 ld_r [SysTools.FileOption "" script]
1042 ld_r (map (SysTools.FileOption "" . split_obj) [1..n])
1044 return (StopLn, dflags, maybe_loc, output_fn)
1047 -----------------------------------------------------------------------------
1048 -- MoveBinary sort-of-phase
1049 -- After having produced a binary, move it somewhere else and generate a
1050 -- wrapper script calling the binary. Currently, we need this only in
1051 -- a parallel way (i.e. in GUM), because PVM expects the binary in a
1052 -- central directory.
1053 -- This is called from staticLink below, after linking. I haven't made it
1054 -- a separate phase to minimise interfering with other modules, and
1055 -- we don't need the generality of a phase (MoveBinary is always
1056 -- done after linking and makes only sense in a parallel setup) -- HWL
1058 runPhase_MoveBinary input_fn
1061 pvm_root <- getEnv "PVM_ROOT"
1062 pvm_arch <- getEnv "PVM_ARCH"
1064 pvm_executable_base = "=" ++ input_fn
1065 pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base
1066 -- nuke old binary; maybe use configur'ed names for cp and rm?
1067 system ("rm -f " ++ pvm_executable)
1068 -- move the newly created binary into PVM land
1069 system ("cp -p " ++ input_fn ++ " " ++ pvm_executable)
1070 -- generate a wrapper script for running a parallel prg under PVM
1071 writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan)
1074 -- generates a Perl skript starting a parallel prg under PVM
1075 mk_pvm_wrapper_script :: String -> String -> String -> String
1076 mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $
1078 "eval 'exec perl -S $0 ${1+\"$@\"}'",
1079 " if $running_under_some_shell;",
1080 "# =!=!=!=!=!=!=!=!=!=!=!",
1081 "# This script is automatically generated: DO NOT EDIT!!!",
1082 "# Generated by Glasgow Haskell Compiler",
1083 "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!",
1085 "$pvm_executable = '" ++ pvm_executable ++ "';",
1086 "$pvm_executable_base = '" ++ pvm_executable_base ++ "';",
1087 "$SysMan = '" ++ sysMan ++ "';",
1089 {- ToDo: add the magical shortcuts again iff we actually use them -- HWL
1090 "# first, some magical shortcuts to run "commands" on the binary",
1091 "# (which is hidden)",
1092 "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {",
1093 " local($cmd) = $1;",
1094 " system("$cmd $pvm_executable");",
1095 " exit(0); # all done",
1098 "# Now, run the real binary; process the args first",
1099 "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base,
1101 "$nprocessors = 0; # the default: as many PEs as machines in PVM config",
1102 "@nonPVM_args = ();",
1103 "$in_RTS_args = 0;",
1105 "args: while ($a = shift(@ARGV)) {",
1106 " if ( $a eq '+RTS' ) {",
1107 " $in_RTS_args = 1;",
1108 " } elsif ( $a eq '-RTS' ) {",
1109 " $in_RTS_args = 0;",
1111 " if ( $a eq '-d' && $in_RTS_args ) {",
1113 " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {",
1114 " $nprocessors = $1;",
1115 " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {",
1116 " $nprocessors = $1;",
1118 " push(@nonPVM_args, $a);",
1122 "local($return_val) = 0;",
1123 "# Start the parallel execution by calling SysMan",
1124 "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");",
1125 "$return_val = $?;",
1126 "# ToDo: fix race condition moving files and flushing them!!",
1127 "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";",
1128 "exit($return_val);"
1131 -----------------------------------------------------------------------------
1132 -- Complain about non-dynamic flags in OPTIONS pragmas
1134 checkProcessArgsResult flags filename
1135 = do when (notNull flags) (throwDyn (ProgramError (
1136 showSDoc (hang (text filename <> char ':')
1137 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+>
1138 hsep (map text flags)))
1141 -----------------------------------------------------------------------------
1142 -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file
1144 getHCFilePackages :: FilePath -> IO [PackageId]
1145 getHCFilePackages filename =
1146 EXCEPTION.bracket (openFile filename ReadMode) hClose $ \h -> do
1149 '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest ->
1150 return (map stringToPackageId (words rest))
1154 -----------------------------------------------------------------------------
1155 -- Static linking, of .o files
1157 -- The list of packages passed to link is the list of packages on
1158 -- which this program depends, as discovered by the compilation
1159 -- manager. It is combined with the list of packages that the user
1160 -- specifies on the command line with -package flags.
1162 -- In one-shot linking mode, we can't discover the package
1163 -- dependencies (because we haven't actually done any compilation or
1164 -- read any interface files), so the user must explicitly specify all
1167 staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO ()
1168 staticLink dflags o_files dep_packages = do
1169 let verb = getVerbFlag dflags
1170 output_fn = exeFileName dflags
1172 -- get the full list of packages to link with, by combining the
1173 -- explicit packages with the auto packages and all of their
1174 -- dependencies, and eliminating duplicates.
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 #ifdef darwin_TARGET_OS
1185 pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages
1186 let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths
1188 let framework_paths = frameworkPaths dflags
1189 framework_path_opts = map ("-F"++) framework_paths
1191 pkg_frameworks <- getPackageFrameworks dflags dep_packages
1192 let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ]
1194 let frameworks = cmdlineFrameworks dflags
1195 framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ]
1196 -- reverse because they're added in reverse order from the cmd line
1199 -- probably _stub.o files
1200 extra_ld_inputs <- readIORef v_Ld_inputs
1202 -- opts from -optl-<blah> (including -l<blah> options)
1203 let extra_ld_opts = getOpts dflags opt_l
1205 let ways = wayNames dflags
1207 -- Here are some libs that need to be linked at the *end* of
1208 -- the command line, because they contain symbols that are referred to
1209 -- by the RTS. We can't therefore use the ordinary way opts for these.
1211 debug_opts | WayDebug `elem` ways = [
1212 #if defined(HAVE_LIBBFD)
1219 thread_opts | WayThreaded `elem` ways = [
1220 #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS)
1223 #if defined(osf3_TARGET_OS)
1229 let (md_c_flags, _) = machdepCCOpts dflags
1230 SysTools.runLink dflags (
1231 [ SysTools.Option verb
1232 , SysTools.Option "-o"
1233 , SysTools.FileOption "" output_fn
1235 ++ map SysTools.Option (
1241 #ifdef darwin_TARGET_OS
1242 ++ framework_path_opts
1245 ++ pkg_lib_path_opts
1247 #ifdef darwin_TARGET_OS
1248 ++ pkg_framework_path_opts
1249 ++ pkg_framework_opts
1255 -- parallel only: move binary to another dir -- HWL
1256 when (WayPar `elem` ways)
1257 (do success <- runPhase_MoveBinary output_fn
1258 if success then return ()
1259 else throwDyn (InstallationError ("cannot move binary to PVM dir")))
1262 exeFileName :: DynFlags -> FilePath
1264 | Just s <- outputFile dflags =
1265 #if defined(mingw32_HOST_OS)
1266 if null (suffixOf s)
1267 then s `joinFileExt` "exe"
1273 #if defined(mingw32_HOST_OS)
1279 -----------------------------------------------------------------------------
1280 -- Making a DLL (only for Win32)
1282 doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO ()
1283 doMkDLL dflags o_files dep_packages = do
1284 let verb = getVerbFlag dflags
1285 let static = opt_Static
1286 let no_hs_main = dopt Opt_NoHsMain dflags
1287 let o_file = outputFile dflags
1288 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
1290 pkg_lib_paths <- getPackageLibraryPath dflags dep_packages
1291 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
1293 let lib_paths = libraryPaths dflags
1294 let lib_path_opts = map ("-L"++) lib_paths
1296 pkg_link_opts <- getPackageLinkOpts dflags dep_packages
1298 -- probably _stub.o files
1299 extra_ld_inputs <- readIORef v_Ld_inputs
1301 -- opts from -optdll-<blah>
1302 let extra_ld_opts = getOpts dflags opt_dll
1304 let pstate = pkgState dflags
1305 rts_id | ExtPackage id <- rtsPackageId pstate = id
1306 | otherwise = panic "staticLink: rts package missing"
1307 base_id | ExtPackage id <- basePackageId pstate = id
1308 | otherwise = panic "staticLink: base package missing"
1309 rts_pkg = getPackageDetails pstate rts_id
1310 base_pkg = getPackageDetails pstate base_id
1312 let extra_os = if static || no_hs_main
1314 else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o",
1315 head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ]
1317 let (md_c_flags, _) = machdepCCOpts dflags
1318 SysTools.runMkDLL dflags
1319 ([ SysTools.Option verb
1320 , SysTools.Option "-o"
1321 , SysTools.FileOption "" output_fn
1323 ++ map SysTools.Option (
1327 ++ [ "--target=i386-mingw32" ]
1331 ++ pkg_lib_path_opts
1333 ++ (if "--def" `elem` (concatMap words extra_ld_opts)
1335 else [ "--export-all" ])
1338 -- -----------------------------------------------------------------------------
1341 doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO ()
1342 doCpp dflags raw include_cc_opts input_fn output_fn = do
1343 let hscpp_opts = getOpts dflags opt_P
1344 let cmdline_include_paths = includePaths dflags
1346 pkg_include_dirs <- getPackageIncludePath dflags []
1347 let include_paths = foldr (\ x xs -> "-I" : x : xs) []
1348 (cmdline_include_paths ++ pkg_include_dirs)
1350 let verb = getVerbFlag dflags
1353 | not include_cc_opts = []
1354 | otherwise = (optc ++ md_c_flags)
1356 optc = getOpts dflags opt_c
1357 (md_c_flags, _) = machdepCCOpts dflags
1359 let cpp_prog args | raw = SysTools.runCpp dflags args
1360 | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args)
1363 [ "-D" ++ HOST_OS ++ "_BUILD_OS=1",
1364 "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1",
1365 "-D" ++ TARGET_OS ++ "_HOST_OS=1",
1366 "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ]
1367 -- remember, in code we *compile*, the HOST is the same our TARGET,
1368 -- and BUILD is the same as our HOST.
1370 cpp_prog ([SysTools.Option verb]
1371 ++ map SysTools.Option include_paths
1372 ++ map SysTools.Option hsSourceCppOpts
1373 ++ map SysTools.Option hscpp_opts
1374 ++ map SysTools.Option cc_opts
1375 ++ map SysTools.Option target_defs
1376 ++ [ SysTools.Option "-x"
1377 , SysTools.Option "c"
1378 , SysTools.Option input_fn
1379 -- We hackily use Option instead of FileOption here, so that the file
1380 -- name is not back-slashed on Windows. cpp is capable of
1381 -- dealing with / in filenames, so it works fine. Furthermore
1382 -- if we put in backslashes, cpp outputs #line directives
1383 -- with *double* backslashes. And that in turn means that
1384 -- our error messages get double backslashes in them.
1385 -- In due course we should arrange that the lexer deals
1386 -- with these \\ escapes properly.
1387 , SysTools.Option "-o"
1388 , SysTools.FileOption "" output_fn
1391 cHaskell1Version = "5" -- i.e., Haskell 98
1393 -- Default CPP defines in Haskell source
1395 [ "-D__HASKELL1__="++cHaskell1Version
1396 , "-D__GLASGOW_HASKELL__="++cProjectVersionInt
1398 , "-D__CONCURRENT_HASKELL__"
1401 -----------------------------------------------------------------------------
1402 -- Reading OPTIONS pragmas
1404 -- This is really very ugly and should be rewritten.
1405 -- - some error messages are thrown as exceptions (should return)
1406 -- - we ignore LINE pragmas
1407 -- - parsing is horrible, combination of prefixMatch and 'read'.
1409 getOptionsFromSource
1410 :: String -- input file
1411 -> IO [String] -- options, if any
1412 getOptionsFromSource file
1413 = do h <- openFile file ReadMode
1414 look h 1 `finally` hClose h
1417 r <- tryJust ioErrors (hGetLine h)
1419 Left e | isEOFError e -> return []
1420 | otherwise -> ioError e
1422 let l = removeSpaces l'
1424 () | null l -> look h (i+1)
1425 | prefixMatch "#" l -> look h (i+1)
1426 | prefixMatch "{-# LINE" l -> look h (i+1) -- -} wrong!
1427 | Just opts <- matchOptions i file l
1428 -> do rest <- look h (i+1)
1429 return (opts ++ rest)
1430 | otherwise -> return []
1432 getOptionsFromStringBuffer :: StringBuffer -> FilePath -> [(Int,String)]
1433 getOptionsFromStringBuffer buffer@(StringBuffer _ len _) fn =
1435 ls = lines (lexemeToString buffer len) -- lazy, so it's ok
1441 let l = removeSpaces l'
1443 () | null l -> look (i+1) ls
1444 | prefixMatch "#" l -> look (i+1) ls
1445 | prefixMatch "{-# LINE" l -> look (i+1) ls -- -} wrong!
1446 | Just opts <- matchOptions i fn l
1447 -> zip (repeat i) opts ++ look (i+1) ls
1450 -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
1451 -- instead of OPTIONS_GHC, but that is deprecated.
1453 | Just s1 <- maybePrefixMatch "{-#" s -- -}
1454 = matchOptions1 i fn (removeSpaces s1)
1458 matchOptions1 i fn s
1459 | Just s2 <- maybePrefixMatch "OPTIONS" s
1461 _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
1462 -> matchOptions2 i fn s3
1463 | not (is_ident (head s2))
1464 -> matchOptions2 i fn s2
1466 -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
1467 | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)),
1468 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1469 = Just ["-#include", removeSpaces (reverse s3)]
1471 | Just s2 <- maybePrefixMatch "LANGUAGE" s, not (is_ident (head s2)),
1472 Just s3 <- maybePrefixMatch "}-#" (reverse s2)
1473 = case [ exts | (exts,"") <- reads ('[' : reverse (']':s3))] of
1474 [] -> languagePragParseError i fn
1475 exts:_ -> case extensionsToGHCFlag exts of
1476 ([], opts) -> Just opts
1477 (unsup,_) -> unsupportedExtnError i fn unsup
1478 | otherwise = Nothing
1479 matchOptions2 i fn s
1480 | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3))
1481 | otherwise = Nothing
1484 languagePragParseError i fn =
1485 pgmError (showSDoc (mkLocMessage loc (
1486 text "cannot parse LANGUAGE pragma")))
1487 where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0)
1489 unsupportedExtnError i fn unsup =
1490 pgmError (showSDoc (mkLocMessage loc (
1491 text "unsupported extensions: " <>
1492 hcat (punctuate comma (map (text.show) unsup)))))
1493 where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0)
1496 optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages
1497 optionsErrorMsgs unhandled_flags flags_lines filename
1498 = (emptyBag, listToBag (map mkMsg unhandled_flags_lines))
1500 unhandled_flags_lines = [ (l,f) | f <- unhandled_flags,
1501 (l,f') <- flags_lines, f == f' ]
1503 ErrUtils.mkPlainErrMsg (srcLocSpan loc) $
1504 text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag
1506 loc = mkSrcLoc (mkFastString filename) line 0
1507 -- ToDo: we need a better SrcSpan here
1509 -- -----------------------------------------------------------------------------
1512 hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase
1513 hscNextPhase dflags HsBootFile hsc_lang = StopLn
1514 hscNextPhase dflags other hsc_lang =
1517 HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle
1519 HscNothing -> StopLn
1520 HscInterpreted -> StopLn
1524 hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget
1525 hscMaybeAdjustTarget dflags stop HsBootFile current_hsc_lang
1526 = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files
1527 hscMaybeAdjustTarget dflags stop other current_hsc_lang
1530 keep_hc = dopt Opt_KeepHcFiles dflags
1532 -- don't change the lang if we're interpreting
1533 | current_hsc_lang == HscInterpreted = current_hsc_lang
1535 -- force -fvia-C if we are being asked for a .hc file
1536 | HCc <- stop = HscC
1538 -- otherwise, stick to the plan
1539 | otherwise = current_hsc_lang
1541 GLOBAL_VAR(v_Split_info, ("",0), (String,Int))
1542 -- The split prefix and number of files