1 -----------------------------------------------------------------------------
2 -- $Id: DriverPipeline.hs,v 1.55 2001/03/15 11:26:27 simonmar Exp $
6 -- (c) Simon Marlow 2000
8 -----------------------------------------------------------------------------
10 #include "../includes/config.h"
12 module DriverPipeline (
14 -- interfaces for the batch-mode driver
15 GhcMode(..), getGhcMode, v_GhcMode,
16 genPipeline, runPipeline, pipeLoop,
18 -- interfaces for the compilation manager (interpreted/batch-mode)
19 preprocess, compile, CompResult(..),
21 -- batch-mode linking interface
27 #include "HsVersions.h"
49 import Time ( getClockTime )
62 -----------------------------------------------------------------------------
63 -- GHC modes of operation
66 = DoMkDependHS -- ghc -M
67 | DoMkDLL -- ghc --mk-dll
68 | StopBefore Phase -- ghc -E | -C | -S | -c
69 | DoMake -- ghc --make
70 | DoInteractive -- ghc --interactive
71 | DoLink -- [ the default ]
74 GLOBAL_VAR(v_GhcMode, error "todo", GhcMode)
76 modeFlag :: String -> Maybe GhcMode
77 modeFlag "-M" = Just $ DoMkDependHS
78 modeFlag "--mk-dll" = Just $ DoMkDLL
79 modeFlag "-E" = Just $ StopBefore Hsc
80 modeFlag "-C" = Just $ StopBefore HCc
81 modeFlag "-S" = Just $ StopBefore As
82 modeFlag "-c" = Just $ StopBefore Ln
83 modeFlag "--make" = Just $ DoMake
84 modeFlag "--interactive" = Just $ DoInteractive
87 getGhcMode :: [String]
88 -> IO ( [String] -- rest of command line
90 , String -- "GhcMode" flag
93 = case my_partition modeFlag flags of
94 ([] , rest) -> return (rest, DoLink, "") -- default is to do linking
95 ([(flag,one)], rest) -> return (rest, one, flag)
98 "only one of the flags -M, -E, -C, -S, -c, --make, --interactive, -mk-dll is allowed")
100 -----------------------------------------------------------------------------
103 -- Herein is all the magic about which phases to run in which order, whether
104 -- the intermediate files should be in TMPDIR or in the current directory,
105 -- what the suffix of the intermediate files should be, etc.
107 -- The following compilation pipeline algorithm is fairly hacky. A
108 -- better way to do this would be to express the whole compilation as a
109 -- data flow DAG, where the nodes are the intermediate files and the
110 -- edges are the compilation phases. This framework would also work
111 -- nicely if a haskell dependency generator was included in the
114 -- It would also deal much more cleanly with compilation phases that
115 -- generate multiple intermediates, (eg. hsc generates .hc, .hi, and
116 -- possibly stub files), where some of the output files need to be
117 -- processed further (eg. the stub files need to be compiled by the C
120 -- A cool thing to do would then be to execute the data flow graph
121 -- concurrently, automatically taking advantage of extra processors on
122 -- the host machine. For example, when compiling two Haskell files
123 -- where one depends on the other, the data flow graph would determine
124 -- that the C compiler from the first compilation can be overlapped
125 -- with the hsc compilation for the second file.
127 data IntermediateFileType
133 :: GhcMode -- when to stop
134 -> String -- "stop after" flag (for error messages)
135 -> Bool -- True => output is persistent
136 -> HscLang -- preferred output language for hsc
137 -> String -- original filename
138 -> IO [ -- list of phases to run for this file
140 IntermediateFileType, -- keep the output from this phase?
141 String) -- output file suffix
144 genPipeline todo stop_flag persistent_output lang filename
146 split <- readIORef v_Split_object_files
147 mangle <- readIORef v_Do_asm_mangling
148 keep_hc <- readIORef v_Keep_hc_files
149 keep_raw_s <- readIORef v_Keep_raw_s_files
150 keep_s <- readIORef v_Keep_s_files
151 osuf <- readIORef v_Object_suf
154 ----------- ----- ---- --- -- -- - - -
155 (_basename, suffix) = splitFilename filename
157 start = startPhase suffix
159 -- special case for mkdependHS: .hspp files go through MkDependHS
160 start_phase | todo == DoMkDependHS && start == Hsc = MkDependHS
163 haskellish = haskellish_suffix suffix
164 cish = cish_suffix suffix
166 -- for a .hc file we need to force lang to HscC
167 real_lang | start_phase == HCc = HscC
171 ----------- ----- ---- --- -- -- - - -
173 | todo == DoMkDependHS = [ Unlit, Cpp, MkDependHS ]
177 HscC | split && mangle -> [ Unlit, Cpp, Hsc, HCc, Mangle,
178 SplitMangle, SplitAs ]
179 | mangle -> [ Unlit, Cpp, Hsc, HCc, Mangle, As ]
181 | otherwise -> [ Unlit, Cpp, Hsc, HCc, As ]
183 HscAsm | split -> [ Unlit, Cpp, Hsc, SplitMangle, SplitAs ]
184 | otherwise -> [ Unlit, Cpp, Hsc, As ]
186 HscJava | split -> not_valid
187 | otherwise -> error "not implemented: compiling via Java"
189 HscILX | split -> not_valid
190 | otherwise -> [ Unlit, Cpp, Hsc ]
195 | otherwise = [ ] -- just pass this file through to the linker
197 -- ToDo: this is somewhat cryptic
198 not_valid = throwDyn (OtherError ("invalid option combination"))
199 ----------- ----- ---- --- -- -- - - -
201 -- this shouldn't happen.
202 if start_phase /= Ln && start_phase `notElem` pipeline
203 then throwDyn (OtherError ("can't find starting phase for "
208 ----------- ----- ---- --- -- -- - - -
209 myPhaseInputExt Ln = case osuf of Nothing -> phaseInputExt Ln
211 myPhaseInputExt other = phaseInputExt other
214 :: [Phase] -- raw pipeline
215 -> Phase -- phase to stop before
216 -> [(Phase, IntermediateFileType, String{-file extension-})]
217 annotatePipeline [] _ = []
218 annotatePipeline (Ln:_) _ = []
219 annotatePipeline (phase:next_phase:ps) stop =
220 (phase, keep_this_output, myPhaseInputExt next_phase)
221 : annotatePipeline (next_phase:ps) stop
225 = if persistent_output then Persistent else Temporary
229 Mangle | keep_raw_s -> Persistent
230 As | keep_s -> Persistent
231 HCc | keep_hc -> Persistent
234 -- add information about output files to the pipeline
235 -- the suffix on an output file is determined by the next phase
236 -- in the pipeline, so we add linking to the end of the pipeline
237 -- to force the output from the final phase to be a .o file.
238 stop_phase = case todo of
239 StopBefore As | split -> SplitAs
240 StopBefore phase -> phase
243 annotated_pipeline = annotatePipeline (pipeline ++ [ Ln ]) stop_phase
245 phase_ne p (p1,_,_) = (p1 /= p)
246 ----------- ----- ---- --- -- -- - - -
248 -- if we can't find the phase we're supposed to stop before,
249 -- something has gone wrong. This test carefully avoids the
250 -- case where we aren't supposed to do any compilation, because the file
251 -- is already in linkable form (for example).
252 if start_phase `elem` pipeline &&
253 (stop_phase /= Ln && stop_phase `notElem` pipeline)
254 then throwDyn (OtherError
255 ("flag " ++ stop_flag
256 ++ " is incompatible with source file `" ++ filename ++ "'"))
260 takeWhile (phase_ne stop_phase ) $
261 dropWhile (phase_ne start_phase) $
267 :: [ (Phase, IntermediateFileType, String) ] -- phases to run
268 -> String -- input file
269 -> Bool -- doing linking afterward?
270 -> Bool -- take into account -o when generating output?
271 -> IO String -- return final filename
273 runPipeline pipeline input_fn do_linking use_ofile
274 = pipeLoop pipeline input_fn do_linking use_ofile basename suffix
275 where (basename, suffix) = splitFilename input_fn
277 pipeLoop [] input_fn _ _ _ _ = return input_fn
278 pipeLoop ((phase, keep, o_suffix):phases)
279 input_fn do_linking use_ofile orig_basename orig_suffix
282 output_fn <- outputFileName (null phases) keep o_suffix
284 carry_on <- run_phase phase orig_basename orig_suffix input_fn output_fn
285 -- sometimes we bail out early, eg. when the compiler's recompilation
286 -- checker has determined that recompilation isn't necessary.
288 then do let (_,keep,final_suffix) = last phases
289 ofile <- outputFileName True keep final_suffix
291 else do -- carry on ...
293 pipeLoop phases output_fn do_linking use_ofile orig_basename orig_suffix
296 outputFileName last_phase keep suffix
297 = do o_file <- readIORef v_Output_file
298 if last_phase && not do_linking && use_ofile && isJust o_file
301 Nothing -> error "outputFileName"
302 else if keep == Persistent
303 then odir_ify (orig_basename ++ '.':suffix)
304 else newTempName suffix
306 -------------------------------------------------------------------------------
309 run_phase Unlit _basename _suff input_fn output_fn
310 = do unlit <- readIORef v_Pgm_L
311 unlit_flags <- getOpts opt_L
312 runSomething "Literate pre-processor"
313 ("echo '# 1 \"" ++input_fn++"\"' > "++output_fn++" && "
314 ++ unlit ++ ' ':input_fn ++ " - >> " ++ output_fn)
317 -------------------------------------------------------------------------------
320 run_phase Cpp basename suff input_fn output_fn
321 = do src_opts <- getOptionsFromSource input_fn
322 unhandled_flags <- processArgs dynamic_flags src_opts []
324 when (not (null unhandled_flags))
325 (throwDyn (OtherError (
326 basename ++ "." ++ suff
327 ++ ": static flags are not allowed in {-# OPTIONS #-} pragmas:\n\t"
328 ++ unwords unhandled_flags)) (ExitFailure 1))
330 do_cpp <- dynFlag cppFlag
333 cpp <- readIORef v_Pgm_P
334 hscpp_opts <- getOpts opt_P
335 hs_src_cpp_opts <- readIORef v_Hs_source_cpp_opts
337 cmdline_include_paths <- readIORef v_Include_paths
338 pkg_include_dirs <- getPackageIncludePath
339 let include_paths = map (\p -> "-I"++p) (cmdline_include_paths
343 (md_c_flags, _) <- machdepCCOpts
345 runSomething "C pre-processor"
347 (["echo '{-# LINE 1 \"" ++ input_fn ++ "\" #-}'", ">", output_fn, "&&",
353 ++ [ "-x", "c", input_fn, ">>", output_fn ]
356 runSomething "Ineffective C pre-processor"
357 ("echo '{-# LINE 1 \"" ++ input_fn ++ "\" #-}' > "
358 ++ output_fn ++ " && cat " ++ input_fn
359 ++ " >> " ++ output_fn)
362 -----------------------------------------------------------------------------
365 run_phase MkDependHS basename suff input_fn _output_fn = do
366 src <- readFile input_fn
367 let (import_sources, import_normals, module_name) = getImports src
369 deps_sources <- mapM (findDependency True basename) import_sources
370 deps_normals <- mapM (findDependency False basename) import_normals
371 let deps = deps_sources ++ deps_normals
373 osuf_opt <- readIORef v_Object_suf
374 let osuf = case osuf_opt of
375 Nothing -> phaseInputExt Ln
378 extra_suffixes <- readIORef v_Dep_suffixes
379 let suffixes = osuf : map (++ ('_':osuf)) extra_suffixes
380 ofiles = map (\suf -> basename ++ '.':suf) suffixes
382 objs <- mapM odir_ify ofiles
384 hdl <- readIORef v_Dep_tmp_hdl
386 -- std dependency of the object(s) on the source file
387 hPutStrLn hdl (unwords objs ++ " : " ++ basename ++ '.':suff)
389 let genDep (dep, False {- not an hi file -}) =
390 hPutStrLn hdl (unwords objs ++ " : " ++ dep)
391 genDep (dep, True {- is an hi file -}) = do
392 hisuf <- readIORef v_Hi_suf
393 let dep_base = remove_suffix '.' dep
394 deps = (dep_base ++ hisuf)
395 : map (\suf -> dep_base ++ suf ++ '_':hisuf) extra_suffixes
396 -- length objs should be == length deps
397 sequence_ (zipWith (\o d -> hPutStrLn hdl (o ++ " : " ++ d)) objs deps)
399 mapM genDep [ d | Just d <- deps ]
403 -- add the lines to dep_makefile:
407 -- if the dependency is on something other than a .hi file:
408 -- this.o this.p_o ... : dep
410 -- if the import is {-# SOURCE #-}
411 -- this.o this.p_o ... : dep.hi-boot[-$vers]
414 -- this.o ... : dep.hi
415 -- this.p_o ... : dep.p_hi
418 -- (where .o is $osuf, and the other suffixes come from
419 -- the cmdline -s options).
421 -----------------------------------------------------------------------------
424 -- Compilation of a single module, in "legacy" mode (_not_ under
425 -- the direction of the compilation manager).
426 run_phase Hsc basename suff input_fn output_fn
429 -- we add the current directory (i.e. the directory in which
430 -- the .hs files resides) to the import path, since this is
431 -- what gcc does, and it's probably what you want.
432 let current_dir = getdir basename
434 paths <- readIORef v_Include_paths
435 writeIORef v_Include_paths (current_dir : paths)
437 -- figure out where to put the .hi file
438 ohi <- readIORef v_Output_hi
439 hisuf <- readIORef v_Hi_suf
440 let hifile = case ohi of
441 Nothing -> basename ++ '.':hisuf
444 -- figure out if the source has changed, for recompilation avoidance.
445 -- only do this if we're eventually going to generate a .o file.
446 -- (ToDo: do when generating .hc files too?)
448 -- Setting source_unchanged to True means that M.o seems
449 -- to be up to date wrt M.hs; so no need to recompile unless imports have
450 -- changed (which the compiler itself figures out).
451 -- Setting source_unchanged to False tells the compiler that M.o is out of
452 -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless.
453 do_recomp <- readIORef v_Recomp
454 todo <- readIORef v_GhcMode
455 o_file' <- odir_ify (basename ++ '.':phaseInputExt Ln)
456 o_file <- osuf_ify o_file'
458 if not (do_recomp && ( todo == DoLink || todo == StopBefore Ln ))
460 else do t1 <- getModificationTime (basename ++ '.':suff)
461 o_file_exists <- doesFileExist o_file
463 then return False -- Need to recompile
464 else do t2 <- getModificationTime o_file
469 -- build a ModuleLocation to pass to hscMain.
470 modsrc <- readFile input_fn
471 let (srcimps,imps,mod_name) = getImports modsrc
474 <- mkHomeModuleLocn mod_name basename (basename ++ '.':suff)
477 dyn_flags <- readIORef v_DynFlags
480 pcs <- initPersistentCompilerState
481 result <- hscMain OneShot
482 dyn_flags{ hscOutName = output_fn }
484 location{ ml_hspp_file=Just input_fn }
488 emptyModuleEnv -- HomeSymbolTable
489 emptyModuleEnv -- HomeIfaceTable
494 HscFail pcs -> throwDyn (PhaseFailed "hsc" (ExitFailure 1));
496 HscNoRecomp pcs details iface ->
498 runSomething "Touching object file" ("touch " ++ o_file);
502 HscRecomp pcs details iface maybe_stub_h maybe_stub_c
503 _maybe_interpreted_code -> do
506 maybe_stub_o <- dealWithStubs basename maybe_stub_h maybe_stub_c
509 Just stub_o -> add v_Ld_inputs stub_o
514 -----------------------------------------------------------------------------
517 -- we don't support preprocessing .c files (with -E) now. Doing so introduces
518 -- way too many hacks, and I can't say I've ever used it anyway.
520 run_phase cc_phase _basename _suff input_fn output_fn
521 | cc_phase == Cc || cc_phase == HCc
522 = do cc <- readIORef v_Pgm_c
523 cc_opts <- (getOpts opt_c)
524 cmdline_include_dirs <- readIORef v_Include_paths
526 let hcc = cc_phase == HCc
528 -- add package include paths even if we're just compiling
529 -- .c files; this is the Value Add(TM) that using
530 -- ghc instead of gcc gives you :)
531 pkg_include_dirs <- getPackageIncludePath
532 let include_paths = map (\p -> "-I"++p) (cmdline_include_dirs
535 c_includes <- getPackageCIncludes
536 cmdline_includes <- dynFlag cmdlineHcIncludes -- -#include options
538 let cc_injects | hcc = unlines (map mk_include
539 (c_includes ++ reverse cmdline_includes))
543 '"':_{-"-} -> "#include "++h_file
544 '<':_ -> "#include "++h_file
545 _ -> "#include \""++h_file++"\""
547 cc_help <- newTempName "c"
548 h <- openFile cc_help WriteMode
550 hPutStrLn h ("#include \"" ++ input_fn ++ "\"\n")
553 ccout <- newTempName "ccout"
555 mangle <- readIORef v_Do_asm_mangling
556 (md_c_flags, md_regd_c_flags) <- machdepCCOpts
560 o2 <- readIORef v_minus_o2_for_C
561 let opt_flag | o2 = "-O2"
564 pkg_extra_cc_opts <- getPackageExtraCcOpts
566 split_objs <- readIORef v_Split_object_files
567 let split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ]
570 excessPrecision <- readIORef v_Excess_precision
572 runSomething "C Compiler"
573 (unwords ([ cc, "-x", "c", cc_help, "-o", output_fn ]
575 ++ (if cc_phase == HCc && mangle
578 ++ [ verb, "-S", "-Wimplicit", opt_flag ]
579 ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ]
582 ++ (if excessPrecision then [] else [ "-ffloat-store" ])
589 -- ToDo: postprocess the output from gcc
591 -----------------------------------------------------------------------------
594 run_phase Mangle _basename _suff input_fn output_fn
595 = do mangler <- readIORef v_Pgm_m
596 mangler_opts <- getOpts opt_m
598 if (prefixMatch "i386" cTARGETPLATFORM)
599 then do n_regs <- dynFlag stolen_x86_regs
600 return [ show n_regs ]
602 runSomething "Assembly Mangler"
605 ++ [ input_fn, output_fn ]
610 -----------------------------------------------------------------------------
613 run_phase SplitMangle _basename _suff input_fn _output_fn
614 = do splitter <- readIORef v_Pgm_s
616 -- this is the prefix used for the split .s files
617 tmp_pfx <- readIORef v_TmpDir
619 let split_s_prefix = tmp_pfx ++ "/ghc" ++ show x
620 writeIORef v_Split_prefix split_s_prefix
621 addFilesToClean [split_s_prefix ++ "__*"] -- d:-)
623 -- allocate a tmp file to put the no. of split .s files in (sigh)
624 n_files <- newTempName "n_files"
626 runSomething "Split Assembly File"
633 -- save the number of split files for future references
634 s <- readFile n_files
635 let n = read s :: Int
636 writeIORef v_N_split_files n
639 -----------------------------------------------------------------------------
642 run_phase As _basename _suff input_fn output_fn
643 = do as <- readIORef v_Pgm_a
644 as_opts <- getOpts opt_a
646 cmdline_include_paths <- readIORef v_Include_paths
647 let cmdline_include_flags = map (\p -> "-I"++p) cmdline_include_paths
648 runSomething "Assembler"
649 (unwords (as : as_opts
650 ++ cmdline_include_flags
651 ++ [ "-c", input_fn, "-o", output_fn ]
655 run_phase SplitAs basename _suff _input_fn _output_fn
656 = do as <- readIORef v_Pgm_a
657 as_opts <- getOpts opt_a
659 split_s_prefix <- readIORef v_Split_prefix
660 n <- readIORef v_N_split_files
662 odir <- readIORef v_Output_dir
663 let real_odir = case odir of
667 let assemble_file n = do
668 let input_s = split_s_prefix ++ "__" ++ show n ++ ".s"
669 let output_o = newdir real_odir
670 (basename ++ "__" ++ show n ++ ".o")
671 real_o <- osuf_ify output_o
672 runSomething "Assembler"
673 (unwords (as : as_opts
674 ++ [ "-c", "-o", real_o, input_s ]
677 mapM_ assemble_file [1..n]
680 -----------------------------------------------------------------------------
683 doLink :: [String] -> IO ()
685 ln <- readIORef v_Pgm_l
687 static <- readIORef v_Static
688 let imp = if static then "" else "_imp"
689 no_hs_main <- readIORef v_NoHsMain
691 o_file <- readIORef v_Output_file
692 let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; }
694 pkg_lib_paths <- getPackageLibraryPath
695 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
697 lib_paths <- readIORef v_Library_paths
698 let lib_path_opts = map ("-L"++) lib_paths
700 pkg_libs <- getPackageLibraries
701 let pkg_lib_opts = map (\lib -> "-l" ++ lib ++ imp) pkg_libs
703 libs <- readIORef v_Cmdline_libraries
704 let lib_opts = map ("-l"++) (reverse libs)
705 -- reverse because they're added in reverse order from the cmd line
707 pkg_extra_ld_opts <- getPackageExtraLdOpts
709 -- probably _stub.o files
710 extra_ld_inputs <- readIORef v_Ld_inputs
712 -- opts from -optl-<blah>
713 extra_ld_opts <- getStaticOpts v_Opt_l
715 rts_pkg <- getPackageDetails ["rts"]
716 std_pkg <- getPackageDetails ["std"]
717 #ifdef mingw32_TARGET_OS
718 let extra_os = if static || no_hs_main
720 else [ head (library_dirs (head rts_pkg)) ++ "/Main.dll_o",
721 head (library_dirs (head std_pkg)) ++ "/PrelMain.dll_o" ]
723 (md_c_flags, _) <- machdepCCOpts
724 runSomething "Linker"
726 ([ ln, verb, "-o", output_fn ]
729 #ifdef mingw32_TARGET_OS
739 #ifdef mingw32_TARGET_OS
740 ++ if static then [ "-u _PrelMain_mainIO_closure" , "-u ___init_PrelMain"] else []
742 ++ [ "-u PrelMain_mainIO_closure" , "-u __init_PrelMain"]
747 -----------------------------------------------------------------------------
750 -- only for Win32, but bits that are #ifdefed in doLn are still #ifdefed here
751 -- in a vain attempt to aid future portability
752 doMkDLL :: [String] -> IO ()
754 ln <- readIORef v_Pgm_dll
756 static <- readIORef v_Static
757 let imp = if static then "" else "_imp"
758 no_hs_main <- readIORef v_NoHsMain
760 o_file <- readIORef v_Output_file
761 let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; }
763 pkg_lib_paths <- getPackageLibraryPath
764 let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths
766 lib_paths <- readIORef v_Library_paths
767 let lib_path_opts = map ("-L"++) lib_paths
769 pkg_libs <- getPackageLibraries
770 let pkg_lib_opts = map (\lib -> "-l" ++ lib ++ imp) pkg_libs
772 libs <- readIORef v_Cmdline_libraries
773 let lib_opts = map ("-l"++) (reverse libs)
774 -- reverse because they're added in reverse order from the cmd line
776 pkg_extra_ld_opts <- getPackageExtraLdOpts
778 -- probably _stub.o files
779 extra_ld_inputs <- readIORef v_Ld_inputs
781 -- opts from -optdll-<blah>
782 extra_ld_opts <- getStaticOpts v_Opt_dll
784 rts_pkg <- getPackageDetails ["rts"]
785 std_pkg <- getPackageDetails ["std"]
786 #ifdef mingw32_TARGET_OS
787 let extra_os = if static || no_hs_main
789 else [ head (library_dirs (head rts_pkg)) ++ "/Main.dll_o",
790 head (library_dirs (head std_pkg)) ++ "/PrelMain.dll_o" ]
792 (md_c_flags, _) <- machdepCCOpts
793 runSomething "DLL creator"
795 ([ ln, verb, "-o", output_fn ]
798 #ifdef mingw32_TARGET_OS
800 ++ [ "--target=i386-mingw32" ]
808 ++ (case findPS (packString (concat extra_ld_opts)) (packString "--def") of
809 Nothing -> [ "--export-all" ]
815 -----------------------------------------------------------------------------
816 -- Just preprocess a file, put the result in a temp. file (used by the
817 -- compilation manager during the summary phase).
819 preprocess :: FilePath -> IO FilePath
820 preprocess filename =
821 ASSERT(haskellish_file filename)
822 do init_dyn_flags <- readIORef v_InitDynFlags
823 writeIORef v_DynFlags init_dyn_flags
824 pipeline <- genPipeline (StopBefore Hsc) ("preprocess") False
825 defaultHscLang filename
826 runPipeline pipeline filename False{-no linking-} False{-no -o flag-}
828 -----------------------------------------------------------------------------
829 -- Compile a single module, under the control of the compilation manager.
831 -- This is the interface between the compilation manager and the
832 -- compiler proper (hsc), where we deal with tedious details like
833 -- reading the OPTIONS pragma from the source file, and passing the
834 -- output of hsc through the C compiler.
836 -- The driver sits between 'compile' and 'hscMain', translating calls
837 -- to the former into calls to the latter, and results from the latter
838 -- into results from the former. It does things like preprocessing
839 -- the .hs file if necessary, and compiling up the .stub_c files to
840 -- generate Linkables.
842 -- NB. No old interface can also mean that the source has changed.
844 compile :: GhciMode -- distinguish batch from interactive
845 -> ModSummary -- summary, including source
846 -> Bool -- True <=> source unchanged
847 -> Bool -- True <=> have object
848 -> Maybe ModIface -- old interface, if available
849 -> HomeSymbolTable -- for home module ModDetails
850 -> HomeIfaceTable -- for home module Ifaces
851 -> PersistentCompilerState -- persistent compiler state
855 = CompOK PersistentCompilerState -- updated PCS
856 ModDetails -- new details (HST additions)
857 ModIface -- new iface (HIT additions)
859 -- new code; Nothing => compilation was not reqd
860 -- (old code is still valid)
862 | CompErrs PersistentCompilerState -- updated PCS
865 compile ghci_mode summary source_unchanged have_object
866 old_iface hst hit pcs = do
867 init_dyn_flags <- readIORef v_InitDynFlags
868 writeIORef v_DynFlags init_dyn_flags
870 showPass init_dyn_flags
871 (showSDoc (text "Compiling" <+> ppr (name_of_summary summary)))
873 let verb = verbosity init_dyn_flags
874 let location = ms_location summary
875 let input_fn = unJust "compile:hs" (ml_hs_file location)
876 let input_fnpp = unJust "compile:hspp" (ml_hspp_file location)
878 when (verb >= 2) (hPutStrLn stderr ("compile: input file " ++ input_fnpp))
880 opts <- getOptionsFromSource input_fnpp
881 processArgs dynamic_flags opts []
882 dyn_flags <- readIORef v_DynFlags
884 let hsc_lang = hscLang dyn_flags
885 output_fn <- case hsc_lang of
886 HscAsm -> newTempName (phaseInputExt As)
887 HscC -> newTempName (phaseInputExt HCc)
888 HscJava -> newTempName "java" -- ToDo
890 HscILX -> newTempName "ilx" -- ToDo
892 HscInterpreted -> return (error "no output file")
895 hsc_result <- hscMain ghci_mode dyn_flags{ hscOutName = output_fn }
896 (ms_mod summary) location
897 source_unchanged have_object old_iface hst hit pcs
900 HscFail pcs -> return (CompErrs pcs)
902 HscNoRecomp pcs details iface -> return (CompOK pcs details iface Nothing)
904 HscRecomp pcs details iface
905 maybe_stub_h maybe_stub_c maybe_interpreted_code -> do
907 let (basename, _) = splitFilename input_fn
908 maybe_stub_o <- dealWithStubs basename maybe_stub_h maybe_stub_c
909 let stub_unlinked = case maybe_stub_o of
911 Just stub_o -> [ DotO stub_o ]
913 (hs_unlinked, unlinked_time) <-
916 -- in interpreted mode, just return the compiled code
917 -- as our "unlinked" object.
919 case maybe_interpreted_code of
920 Just (bcos,itbl_env) -> do tm <- getClockTime
921 return ([BCOs bcos itbl_env], tm)
922 Nothing -> panic "compile: no interpreted code"
924 -- we're in batch mode: finish the compilation pipeline.
925 _other -> do pipe <- genPipeline (StopBefore Ln) "" True
927 -- runPipeline takes input_fn so it can split off
928 -- the base name and use it as the base of
929 -- the output object file.
930 let (basename, suffix) = splitFilename input_fn
931 o_file <- pipeLoop pipe output_fn False False
933 o_time <- getModificationTime o_file
934 return ([DotO o_file], o_time)
936 let linkable = LM unlinked_time (moduleName (ms_mod summary))
937 (hs_unlinked ++ stub_unlinked)
939 return (CompOK pcs details iface (Just linkable))
942 -----------------------------------------------------------------------------
943 -- stub .h and .c files (for foreign export support)
945 dealWithStubs basename maybe_stub_h maybe_stub_c
947 = do let stub_h = basename ++ "_stub.h"
948 let stub_c = basename ++ "_stub.c"
950 -- copy the .stub_h file into the current dir if necessary
953 Just tmp_stub_h -> do
954 runSomething "Copy stub .h file"
955 ("cp " ++ tmp_stub_h ++ ' ':stub_h)
957 -- #include <..._stub.h> in .hc file
958 addCmdlineHCInclude tmp_stub_h -- hack
960 -- copy the .stub_c file into the current dir, and compile it, if necessary
962 Nothing -> return Nothing
963 Just tmp_stub_c -> do -- copy the _stub.c file into the current dir
964 runSomething "Copy stub .c file"
966 "rm -f", stub_c, "&&",
967 "echo \'#include \"Stg.h\"\n#include \""++stub_h++"\"\' >"++stub_c, " &&",
968 "cat", tmp_stub_c, ">> ", stub_c
971 -- compile the _stub.c file w/ gcc
972 pipeline <- genPipeline (StopBefore Ln) "" True
973 defaultHscLang stub_c
974 stub_o <- runPipeline pipeline stub_c False{-no linking-}
975 False{-no -o option-}