{-# OPTIONS -w #-} -- The above warning supression flag is a temporary kludge. -- While working on this module you are encouraged to remove it and fix -- any warnings in the module. See -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings -- for details ----------------------------------------------------------------------------- -- -- GHC Driver -- -- (c) The University of Glasgow 2005 -- ----------------------------------------------------------------------------- module DriverPipeline ( -- Run a series of compilation steps in a pipeline, for a -- collection of source files. oneShot, compileFile, -- Interfaces for the batch-mode driver linkBinary, -- Interfaces for the compilation manager (interpreted/batch-mode) preprocess, compile, CompResult(..), link, ) where #include "HsVersions.h" import Packages import HeaderInfo import DriverPhases import SysTools import HscMain import Finder import HscTypes import Outputable import Module import UniqFM ( eltsUFM ) import ErrUtils import DynFlags import StaticFlags ( v_Ld_inputs, opt_Static, opt_HardwireLibPaths, WayName(..) ) import Config import Panic import Util import StringBuffer ( hGetStringBuffer ) import BasicTypes ( SuccessFlag(..) ) import Maybes ( expectJust ) import ParserCoreUtils ( getCoreModuleName ) import SrcLoc ( unLoc ) import SrcLoc ( Located(..) ) import Control.Exception as Exception import Data.IORef ( readIORef, writeIORef, IORef ) import GHC.Exts ( Int(..) ) import System.Directory import System.IO import SYSTEM_IO_ERROR as IO import Control.Monad import Data.List ( isSuffixOf ) import Data.Maybe import System.Exit import System.Environment -- --------------------------------------------------------------------------- -- Pre-process -- Just preprocess a file, put the result in a temp. file (used by the -- compilation manager during the summary phase). -- -- We return the augmented DynFlags, because they contain the result -- of slurping in the OPTIONS pragmas preprocess :: DynFlags -> (FilePath, Maybe Phase) -> IO (DynFlags, FilePath) preprocess dflags (filename, mb_phase) = ASSERT2(isJust mb_phase || isHaskellSrcFilename filename, text filename) runPipeline anyHsc dflags (filename, mb_phase) Nothing Temporary Nothing{-no ModLocation-} -- --------------------------------------------------------------------------- -- Compile -- Compile a single module, under the control of the compilation manager. -- -- This is the interface between the compilation manager and the -- compiler proper (hsc), where we deal with tedious details like -- reading the OPTIONS pragma from the source file, and passing the -- output of hsc through the C compiler. -- NB. No old interface can also mean that the source has changed. compile :: HscEnv -> ModSummary -> Maybe Linkable -- Just linkable <=> source unchanged -> Maybe ModIface -- Old interface, if available -> Int -> Int -> IO CompResult data CompResult = CompOK ModDetails -- New details ModIface -- New iface (Maybe Linkable) -- a Maybe, for the same reasons as hm_linkable | CompErrs compile hsc_env mod_summary maybe_old_linkable old_iface mod_index nmods = do let dflags0 = ms_hspp_opts mod_summary this_mod = ms_mod mod_summary src_flavour = ms_hsc_src mod_summary have_object | Just l <- maybe_old_linkable, isObjectLinkable l = True | otherwise = False -- FIXME: We need to know whether or not we're recompiling the file. Move this to HscMain? --showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary) let location = ms_location mod_summary let input_fn = expectJust "compile:hs" (ml_hs_file location) let input_fnpp = ms_hspp_file mod_summary debugTraceMsg dflags0 2 (text "compile: input file" <+> text input_fnpp) let (basename, _) = splitFilename input_fn -- We add the directory in which the .hs files resides) to the import path. -- This is needed when we try to compile the .hc file later, if it -- imports a _stub.h file that we created here. let current_dir = directoryOf basename old_paths = includePaths dflags0 dflags = dflags0 { includePaths = current_dir : old_paths } -- Figure out what lang we're generating let hsc_lang = hscMaybeAdjustTarget dflags StopLn src_flavour (hscTarget dflags) -- ... and what the next phase should be let next_phase = hscNextPhase dflags src_flavour hsc_lang -- ... and what file to generate the output into output_fn <- getOutputFilename next_phase Temporary basename dflags next_phase (Just location) let dflags' = dflags { hscTarget = hsc_lang, hscOutName = output_fn, extCoreName = basename ++ ".hcr" } -- -no-recomp should also work with --make let force_recomp = dopt Opt_ForceRecomp dflags source_unchanged = isJust maybe_old_linkable && not force_recomp hsc_env' = hsc_env { hsc_dflags = dflags' } object_filename = ml_obj_file location let getStubLinkable False = return [] getStubLinkable True = do stub_o <- compileStub dflags' this_mod location return [ DotO stub_o ] handleBatch (HscNoRecomp, iface, details) = ASSERT (isJust maybe_old_linkable) return (CompOK details iface maybe_old_linkable) handleBatch (HscRecomp hasStub, iface, details) | isHsBoot src_flavour = do when (isObjectTarget hsc_lang) $ -- interpreted reaches here too SysTools.touch dflags' "Touching object file" object_filename return (CompOK details iface Nothing) | otherwise = do stub_unlinked <- getStubLinkable hasStub (hs_unlinked, unlinked_time) <- case hsc_lang of HscNothing -> return ([], ms_hs_date mod_summary) -- We're in --make mode: finish the compilation pipeline. _other -> do runPipeline StopLn dflags (output_fn,Nothing) (Just basename) Persistent (Just location) -- The object filename comes from the ModLocation o_time <- getModificationTime object_filename return ([DotO object_filename], o_time) let linkable = LM unlinked_time this_mod (hs_unlinked ++ stub_unlinked) return (CompOK details iface (Just linkable)) handleInterpreted (InteractiveNoRecomp, iface, details) = ASSERT (isJust maybe_old_linkable) return (CompOK details iface maybe_old_linkable) handleInterpreted (InteractiveRecomp hasStub comp_bc modBreaks, iface, details) = do stub_unlinked <- getStubLinkable hasStub let hs_unlinked = [BCOs comp_bc modBreaks] unlinked_time = ms_hs_date mod_summary -- Why do we use the timestamp of the source file here, -- rather than the current time? This works better in -- the case where the local clock is out of sync -- with the filesystem's clock. It's just as accurate: -- if the source is modified, then the linkable will -- be out of date. let linkable = LM unlinked_time this_mod (hs_unlinked ++ stub_unlinked) return (CompOK details iface (Just linkable)) let runCompiler compiler handle = do mbResult <- compiler hsc_env' mod_summary source_unchanged old_iface (Just (mod_index, nmods)) case mbResult of Nothing -> return CompErrs Just result -> handle result -- run the compiler case hsc_lang of HscInterpreted | isHsBoot src_flavour -> runCompiler hscCompileNothing handleBatch | otherwise -> runCompiler hscCompileInteractive handleInterpreted HscNothing -> runCompiler hscCompileNothing handleBatch _other -> runCompiler hscCompileBatch handleBatch ----------------------------------------------------------------------------- -- stub .h and .c files (for foreign export support) -- The _stub.c file is derived from the haskell source file, possibly taking -- into account the -stubdir option. -- -- Consequently, we derive the _stub.o filename from the haskell object -- filename. -- -- This isn't necessarily the same as the object filename we -- would get if we just compiled the _stub.c file using the pipeline. -- For example: -- -- ghc src/A.hs -odir obj -- -- results in obj/A.o, and src/A_stub.c. If we compile src/A_stub.c with -- -odir obj, we would get obj/src/A_stub.o, which is wrong; we want -- obj/A_stub.o. compileStub :: DynFlags -> Module -> ModLocation -> IO FilePath compileStub dflags mod location = do let (o_base, o_ext) = splitFilename (ml_obj_file location) stub_o = o_base ++ "_stub" `joinFileExt` o_ext -- compile the _stub.c file w/ gcc let (stub_c,_,_) = mkStubPaths dflags (moduleName mod) location runPipeline StopLn dflags (stub_c,Nothing) Nothing (SpecificFile stub_o) Nothing{-no ModLocation-} return stub_o -- --------------------------------------------------------------------------- -- Link link :: GhcLink -- interactive or batch -> DynFlags -- dynamic flags -> Bool -- attempt linking in batch mode? -> HomePackageTable -- what to link -> IO SuccessFlag -- For the moment, in the batch linker, we don't bother to tell doLink -- which packages to link -- it just tries all that are available. -- batch_attempt_linking should only be *looked at* in batch mode. It -- should only be True if the upsweep was successful and someone -- exports main, i.e., we have good reason to believe that linking -- will succeed. #ifdef GHCI link LinkInMemory dflags batch_attempt_linking hpt = do -- Not Linking...(demand linker will do the job) return Succeeded #endif link NoLink dflags batch_attempt_linking hpt = return Succeeded link LinkBinary dflags batch_attempt_linking hpt | batch_attempt_linking = do let home_mod_infos = eltsUFM hpt -- the packages we depend on pkg_deps = concatMap (dep_pkgs . mi_deps . hm_iface) home_mod_infos -- the linkables to link linkables = map (expectJust "link".hm_linkable) home_mod_infos debugTraceMsg dflags 3 (text "link: linkables are ..." $$ vcat (map ppr linkables)) -- check for the -no-link flag if isNoLink (ghcLink dflags) then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).") return Succeeded else do let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us) obj_files = concatMap getOfiles linkables exe_file = exeFileName dflags -- if the modification time on the executable is later than the -- modification times on all of the objects, then omit linking -- (unless the -no-recomp flag was given). e_exe_time <- IO.try $ getModificationTime exe_file extra_ld_inputs <- readIORef v_Ld_inputs extra_times <- mapM (IO.try . getModificationTime) extra_ld_inputs let other_times = map linkableTime linkables ++ [ t' | Right t' <- extra_times ] linking_needed | Left _ <- e_exe_time = True | Right t <- e_exe_time = any (t <) other_times if not (dopt Opt_ForceRecomp dflags) && not linking_needed then do debugTraceMsg dflags 2 (text exe_file <+> ptext SLIT("is up to date, linking not required.")) return Succeeded else do debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file <+> text "...") -- Don't showPass in Batch mode; doLink will do that for us. let link = case ghcLink dflags of LinkBinary -> linkBinary LinkDynLib -> linkDynLib link dflags obj_files pkg_deps debugTraceMsg dflags 3 (text "link: done") -- linkBinary only returns if it succeeds return Succeeded | otherwise = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$ text " Main.main not exported; not linking.") return Succeeded -- ----------------------------------------------------------------------------- -- Compile files in one-shot mode. oneShot :: DynFlags -> Phase -> [(String, Maybe Phase)] -> IO () oneShot dflags stop_phase srcs = do o_files <- mapM (compileFile dflags stop_phase) srcs doLink dflags stop_phase o_files compileFile :: DynFlags -> Phase -> (FilePath, Maybe Phase) -> IO FilePath compileFile dflags stop_phase (src, mb_phase) = do exists <- doesFileExist src when (not exists) $ throwDyn (CmdLineError ("does not exist: " ++ src)) let split = dopt Opt_SplitObjs dflags mb_o_file = outputFile dflags ghc_link = ghcLink dflags -- Set by -c or -no-link -- When linking, the -o argument refers to the linker's output. -- otherwise, we use it as the name for the pipeline's output. output | StopLn <- stop_phase, not (isNoLink ghc_link) = Persistent -- -o foo applies to linker | Just o_file <- mb_o_file = SpecificFile o_file -- -o foo applies to the file we are compiling now | otherwise = Persistent stop_phase' = case stop_phase of As | split -> SplitAs other -> stop_phase (_, out_file) <- runPipeline stop_phase' dflags (src, mb_phase) Nothing output Nothing{-no ModLocation-} return out_file doLink :: DynFlags -> Phase -> [FilePath] -> IO () doLink dflags stop_phase o_files | not (isStopLn stop_phase) = return () -- We stopped before the linking phase | otherwise = case ghcLink dflags of NoLink -> return () LinkBinary -> linkBinary dflags o_files link_pkgs LinkDynLib -> linkDynLib dflags o_files [] where -- Always link in the haskell98 package for static linking. Other -- packages have to be specified via the -package flag. link_pkgs = [haskell98PackageId] -- --------------------------------------------------------------------------- -- Run a compilation pipeline, consisting of multiple phases. -- This is the interface to the compilation pipeline, which runs -- a series of compilation steps on a single source file, specifying -- at which stage to stop. -- The DynFlags can be modified by phases in the pipeline (eg. by -- GHC_OPTIONS pragmas), and the changes affect later phases in the -- pipeline. data PipelineOutput = Temporary -- output should be to a temporary file: we're going to -- run more compilation steps on this output later | Persistent -- we want a persistent file, i.e. a file in the current directory -- derived from the input filename, but with the appropriate extension. -- eg. in "ghc -c Foo.hs" the output goes into ./Foo.o. | SpecificFile FilePath -- the output must go into the specified file. runPipeline :: Phase -- When to stop -> DynFlags -- Dynamic flags -> (FilePath,Maybe Phase) -- Input filename (and maybe -x suffix) -> Maybe FilePath -- original basename (if different from ^^^) -> PipelineOutput -- Output filename -> Maybe ModLocation -- A ModLocation, if this is a Haskell module -> IO (DynFlags, FilePath) -- (final flags, output filename) runPipeline stop_phase dflags0 (input_fn, mb_phase) mb_basename output maybe_loc = do let (input_basename, suffix) = splitFilename input_fn basename | Just b <- mb_basename = b | otherwise = input_basename -- Decide where dump files should go based on the pipeline output dflags = dflags0 { dumpPrefix = Just (basename ++ ".") } -- If we were given a -x flag, then use that phase to start from start_phase = fromMaybe (startPhase suffix) mb_phase -- We want to catch cases of "you can't get there from here" before -- we start the pipeline, because otherwise it will just run off the -- end. -- -- There is a partial ordering on phases, where A < B iff A occurs -- before B in a normal compilation pipeline. when (not (start_phase `happensBefore` stop_phase)) $ throwDyn (UsageError ("cannot compile this file to desired target: " ++ input_fn)) -- this is a function which will be used to calculate output file names -- as we go along (we partially apply it to some of its inputs here) let get_output_fn = getOutputFilename stop_phase output basename -- Execute the pipeline... (dflags', output_fn, maybe_loc) <- pipeLoop dflags start_phase stop_phase input_fn basename suffix get_output_fn maybe_loc -- Sometimes, a compilation phase doesn't actually generate any output -- (eg. the CPP phase when -fcpp is not turned on). If we end on this -- stage, but we wanted to keep the output, then we have to explicitly -- copy the file, remembering to prepend a {-# LINE #-} pragma so that -- further compilation stages can tell what the original filename was. case output of Temporary -> return (dflags', output_fn) _other -> do final_fn <- get_output_fn dflags' stop_phase maybe_loc when (final_fn /= output_fn) $ do let msg = ("Copying `" ++ output_fn ++"' to `" ++ final_fn ++ "'") line_prag = Just ("{-# LINE 1 \"" ++ input_fn ++ "\" #-}\n") copyWithHeader dflags msg line_prag output_fn final_fn return (dflags', final_fn) pipeLoop :: DynFlags -> Phase -> Phase -> FilePath -> String -> Suffix -> (DynFlags -> Phase -> Maybe ModLocation -> IO FilePath) -> Maybe ModLocation -> IO (DynFlags, FilePath, Maybe ModLocation) pipeLoop dflags phase stop_phase input_fn orig_basename orig_suff orig_get_output_fn maybe_loc | phase `eqPhase` stop_phase -- All done = return (dflags, input_fn, maybe_loc) | not (phase `happensBefore` stop_phase) -- Something has gone wrong. We'll try to cover all the cases when -- this could happen, so if we reach here it is a panic. -- eg. it might happen if the -C flag is used on a source file that -- has {-# OPTIONS -fasm #-}. = panic ("pipeLoop: at phase " ++ show phase ++ " but I wanted to stop at phase " ++ show stop_phase) | otherwise = do { (next_phase, dflags', maybe_loc, output_fn) <- runPhase phase stop_phase dflags orig_basename orig_suff input_fn orig_get_output_fn maybe_loc ; pipeLoop dflags' next_phase stop_phase output_fn orig_basename orig_suff orig_get_output_fn maybe_loc } getOutputFilename :: Phase -> PipelineOutput -> String -> DynFlags -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath getOutputFilename stop_phase output basename = func where func dflags next_phase maybe_location | is_last_phase, Persistent <- output = persistent_fn | is_last_phase, SpecificFile f <- output = return f | keep_this_output = persistent_fn | otherwise = newTempName dflags suffix where hcsuf = hcSuf dflags odir = objectDir dflags osuf = objectSuf dflags keep_hc = dopt Opt_KeepHcFiles dflags keep_raw_s = dopt Opt_KeepRawSFiles dflags keep_s = dopt Opt_KeepSFiles dflags myPhaseInputExt HCc = hcsuf myPhaseInputExt StopLn = osuf myPhaseInputExt other = phaseInputExt other is_last_phase = next_phase `eqPhase` stop_phase -- sometimes, we keep output from intermediate stages keep_this_output = case next_phase of StopLn -> True Mangle | keep_raw_s -> True As | keep_s -> True HCc | keep_hc -> True _other -> False suffix = myPhaseInputExt next_phase -- persistent object files get put in odir persistent_fn | StopLn <- next_phase = return odir_persistent | otherwise = return persistent persistent = basename `joinFileExt` suffix odir_persistent | Just loc <- maybe_location = ml_obj_file loc | Just d <- odir = d `joinFileName` persistent | otherwise = persistent -- ----------------------------------------------------------------------------- -- Each phase in the pipeline returns the next phase to execute, and the -- name of the file in which the output was placed. -- -- We must do things dynamically this way, because we often don't know -- what the rest of the phases will be until part-way through the -- compilation: for example, an {-# OPTIONS -fasm #-} at the beginning -- of a source file can change the latter stages of the pipeline from -- taking the via-C route to using the native code generator. runPhase :: Phase -- Do this phase first -> Phase -- Stop just before this phase -> DynFlags -> String -- basename of original input source -> String -- its extension -> FilePath -- name of file which contains the input to this phase. -> (DynFlags -> Phase -> Maybe ModLocation -> IO FilePath) -- how to calculate the output filename -> Maybe ModLocation -- the ModLocation, if we have one -> IO (Phase, -- next phase DynFlags, -- new dynamic flags Maybe ModLocation, -- the ModLocation, if we have one FilePath) -- output filename -- Invariant: the output filename always contains the output -- Interesting case: Hsc when there is no recompilation to do -- Then the output filename is still a .o file ------------------------------------------------------------------------------- -- Unlit phase runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_loc = do let unlit_flags = getOpts dflags opt_L -- The -h option passes the file name for unlit to put in a #line directive output_fn <- get_output_fn dflags (Cpp sf) maybe_loc SysTools.runUnlit dflags (map SysTools.Option unlit_flags ++ [ SysTools.Option "-h" , SysTools.Option input_fn , SysTools.FileOption "" input_fn , SysTools.FileOption "" output_fn ]) return (Cpp sf, dflags, maybe_loc, output_fn) ------------------------------------------------------------------------------- -- Cpp phase : (a) gets OPTIONS out of file -- (b) runs cpp if necessary runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc = do src_opts <- getOptionsFromFile input_fn (dflags,unhandled_flags) <- parseDynamicFlags dflags0 (map unLoc src_opts) checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff) if not (dopt Opt_Cpp dflags) then -- no need to preprocess CPP, just pass input file along -- to the next phase of the pipeline. return (HsPp sf, dflags, maybe_loc, input_fn) else do output_fn <- get_output_fn dflags (HsPp sf) maybe_loc doCpp dflags True{-raw-} False{-no CC opts-} input_fn output_fn return (HsPp sf, dflags, maybe_loc, output_fn) ------------------------------------------------------------------------------- -- HsPp phase runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc = do if not (dopt Opt_Pp dflags) then -- no need to preprocess, just pass input file along -- to the next phase of the pipeline. return (Hsc sf, dflags, maybe_loc, input_fn) else do let hspp_opts = getOpts dflags opt_F let orig_fn = basename `joinFileExt` suff output_fn <- get_output_fn dflags (Hsc sf) maybe_loc SysTools.runPp dflags ( [ SysTools.Option orig_fn , SysTools.Option input_fn , SysTools.FileOption "" output_fn ] ++ map SysTools.Option hspp_opts ) return (Hsc sf, dflags, maybe_loc, output_fn) ----------------------------------------------------------------------------- -- Hsc phase -- Compilation of a single module, in "legacy" mode (_not_ under -- the direction of the compilation manager). runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _maybe_loc = do -- normal Hsc mode, not mkdependHS -- we add the current directory (i.e. the directory in which -- the .hs files resides) to the include path, since this is -- what gcc does, and it's probably what you want. let current_dir = directoryOf basename paths = includePaths dflags0 dflags = dflags0 { includePaths = current_dir : paths } -- gather the imports and module name (hspp_buf,mod_name,imps,src_imps) <- case src_flavour of ExtCoreFile -> do { -- no explicit imports in ExtCore input. ; m <- getCoreModuleName input_fn ; return (Nothing, mkModuleName m, [], []) } other -> do { buf <- hGetStringBuffer input_fn ; (src_imps,imps,L _ mod_name) <- getImports dflags buf input_fn (basename `joinFileExt` suff) ; return (Just buf, mod_name, imps, src_imps) } -- Build a ModLocation to pass to hscMain. -- The source filename is rather irrelevant by now, but it's used -- by hscMain for messages. hscMain also needs -- the .hi and .o filenames, and this is as good a way -- as any to generate them, and better than most. (e.g. takes -- into accout the -osuf flags) location1 <- mkHomeModLocation2 dflags mod_name basename suff -- Boot-ify it if necessary let location2 | isHsBoot src_flavour = addBootSuffixLocn location1 | otherwise = location1 -- Take -ohi into account if present -- This can't be done in mkHomeModuleLocation because -- it only applies to the module being compiles let ohi = outputHi dflags location3 | Just fn <- ohi = location2{ ml_hi_file = fn } | otherwise = location2 -- Take -o into account if present -- Very like -ohi, but we must *only* do this if we aren't linking -- (If we're linking then the -o applies to the linked thing, not to -- the object file for one module.) -- Note the nasty duplication with the same computation in compileFile above let expl_o_file = outputFile dflags location4 | Just ofile <- expl_o_file , isNoLink (ghcLink dflags) = location3 { ml_obj_file = ofile } | otherwise = location3 o_file = ml_obj_file location4 -- The real object file -- Figure out if the source has changed, for recompilation avoidance. -- -- Setting source_unchanged to True means that M.o seems -- to be up to date wrt M.hs; so no need to recompile unless imports have -- changed (which the compiler itself figures out). -- Setting source_unchanged to False tells the compiler that M.o is out of -- date wrt M.hs (or M.o doesn't exist) so we must recompile regardless. src_timestamp <- getModificationTime (basename `joinFileExt` suff) let force_recomp = dopt Opt_ForceRecomp dflags source_unchanged <- if force_recomp || not (isStopLn stop) -- Set source_unchanged to False unconditionally if -- (a) recompilation checker is off, or -- (b) we aren't going all the way to .o file (e.g. ghc -S) then return False -- Otherwise look at file modification dates else do o_file_exists <- doesFileExist o_file if not o_file_exists then return False -- Need to recompile else do t2 <- getModificationTime o_file if t2 > src_timestamp then return True else return False -- get the DynFlags let hsc_lang = hscMaybeAdjustTarget dflags stop src_flavour (hscTarget dflags) let next_phase = hscNextPhase dflags src_flavour hsc_lang output_fn <- get_output_fn dflags next_phase (Just location4) let dflags' = dflags { hscTarget = hsc_lang, hscOutName = output_fn, extCoreName = basename ++ ".hcr" } hsc_env <- newHscEnv dflags' -- Tell the finder cache about this module mod <- addHomeModuleToFinder hsc_env mod_name location4 -- Make the ModSummary to hand to hscMain let unused_field = panic "runPhase:ModSummary field" -- Some fields are not looked at by hscMain mod_summary = ModSummary { ms_mod = mod, ms_hsc_src = src_flavour, ms_hspp_file = input_fn, ms_hspp_opts = dflags, ms_hspp_buf = hspp_buf, ms_location = location4, ms_hs_date = src_timestamp, ms_obj_date = Nothing, ms_imps = imps, ms_srcimps = src_imps } -- run the compiler! mbResult <- hscCompileOneShot hsc_env mod_summary source_unchanged Nothing -- No iface Nothing -- No "module i of n" progress info case mbResult of Nothing -> throwDyn (PhaseFailed "hsc" (ExitFailure 1)) Just HscNoRecomp -> do SysTools.touch dflags' "Touching object file" o_file -- The .o file must have a later modification date -- than the source file (else we wouldn't be in HscNoRecomp) -- but we touch it anyway, to keep 'make' happy (we think). return (StopLn, dflags', Just location4, o_file) Just (HscRecomp hasStub) -> do when hasStub $ do stub_o <- compileStub dflags' mod location4 consIORef v_Ld_inputs stub_o -- In the case of hs-boot files, generate a dummy .o-boot -- stamp file for the benefit of Make when (isHsBoot src_flavour) $ SysTools.touch dflags' "Touching object file" o_file return (next_phase, dflags', Just location4, output_fn) ----------------------------------------------------------------------------- -- Cmm phase runPhase CmmCpp stop dflags basename suff input_fn get_output_fn maybe_loc = do output_fn <- get_output_fn dflags Cmm maybe_loc doCpp dflags False{-not raw-} True{-include CC opts-} input_fn output_fn return (Cmm, dflags, maybe_loc, output_fn) runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc = do let hsc_lang = hscMaybeAdjustTarget dflags stop HsSrcFile (hscTarget dflags) let next_phase = hscNextPhase dflags HsSrcFile hsc_lang output_fn <- get_output_fn dflags next_phase maybe_loc let dflags' = dflags { hscTarget = hsc_lang, hscOutName = output_fn, extCoreName = basename ++ ".hcr" } ok <- hscCmmFile dflags' input_fn when (not ok) $ throwDyn (PhaseFailed "cmm" (ExitFailure 1)) return (next_phase, dflags, maybe_loc, output_fn) ----------------------------------------------------------------------------- -- Cc phase -- we don't support preprocessing .c files (with -E) now. Doing so introduces -- way too many hacks, and I can't say I've ever used it anyway. runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc | cc_phase `eqPhase` Cc || cc_phase `eqPhase` Ccpp || cc_phase `eqPhase` HCc = do let cc_opts = getOpts dflags opt_c hcc = cc_phase `eqPhase` HCc let cmdline_include_paths = includePaths dflags -- HC files have the dependent packages stamped into them pkgs <- if hcc then getHCFilePackages input_fn else return [] -- add package include paths even if we're just compiling .c -- files; this is the Value Add(TM) that using ghc instead of -- gcc gives you :) pkg_include_dirs <- getPackageIncludePath dflags pkgs let include_paths = foldr (\ x xs -> "-I" : x : xs) [] (cmdline_include_paths ++ pkg_include_dirs) #ifdef darwin_TARGET_OS framework_path_opts <- getFrameworkPathOpts dflags pkgs #endif let (md_c_flags, md_regd_c_flags) = machdepCCOpts dflags gcc_extra_viac_flags <- getExtraViaCOpts dflags let pic_c_flags = picCCOpts dflags let verb = getVerbFlag dflags pkg_extra_cc_opts <- getPackageExtraCcOpts dflags pkgs let split_objs = dopt Opt_SplitObjs dflags split_opt | hcc && split_objs = [ "-DUSE_SPLIT_MARKERS" ] | otherwise = [ ] let excessPrecision = dopt Opt_ExcessPrecision dflags let cc_opt | optLevel dflags >= 2 = "-O2" | otherwise = "-O" -- Decide next phase let mangle = dopt Opt_DoAsmMangling dflags next_phase | hcc && mangle = Mangle | otherwise = As output_fn <- get_output_fn dflags next_phase maybe_loc let more_hcc_opts = #if i386_TARGET_ARCH -- on x86 the floating point regs have greater precision -- than a double, which leads to unpredictable results. -- By default, we turn this off with -ffloat-store unless -- the user specified -fexcess-precision. (if excessPrecision then [] else [ "-ffloat-store" ]) ++ #endif -- gcc's -fstrict-aliasing allows two accesses to memory -- to be considered non-aliasing if they have different types. -- This interacts badly with the C code we generate, which is -- very weakly typed, being derived from C--. ["-fno-strict-aliasing"] SysTools.runCc dflags ( -- force the C compiler to interpret this file as C when -- compiling .hc files, by adding the -x c option. -- Also useful for plain .c files, just in case GHC saw a -- -x c option. [ SysTools.Option "-x", if cc_phase `eqPhase` Ccpp then SysTools.Option "c++" else SysTools.Option "c"] ++ [ SysTools.FileOption "" input_fn , SysTools.Option "-o" , SysTools.FileOption "" output_fn ] ++ map SysTools.Option ( md_c_flags ++ pic_c_flags #ifdef sparc_TARGET_ARCH -- We only support SparcV9 and better because V8 lacks an atomic CAS -- instruction. Note that the user can still override this -- (e.g., -mcpu=ultrasparc) as GCC picks the "best" -mcpu flag -- regardless of the ordering. -- -- This is a temporary hack. ++ ["-mcpu=v9"] #endif ++ (if hcc && mangle then md_regd_c_flags else []) ++ (if hcc then if mangle then gcc_extra_viac_flags else filter (=="-fwrapv") gcc_extra_viac_flags -- still want -fwrapv even for unreg'd else []) ++ (if hcc then more_hcc_opts else []) ++ [ verb, "-S", "-Wimplicit", cc_opt ] ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ] ++ cc_opts ++ split_opt ++ include_paths #ifdef darwin_TARGET_OS ++ framework_path_opts #endif ++ pkg_extra_cc_opts )) return (next_phase, dflags, maybe_loc, output_fn) -- ToDo: postprocess the output from gcc ----------------------------------------------------------------------------- -- Mangle phase runPhase Mangle stop dflags _basename _suff input_fn get_output_fn maybe_loc = do let mangler_opts = getOpts dflags opt_m #if i386_TARGET_ARCH machdep_opts <- return [ show (stolen_x86_regs dflags) ] #else machdep_opts <- return [] #endif let split = dopt Opt_SplitObjs dflags next_phase | split = SplitMangle | otherwise = As output_fn <- get_output_fn dflags next_phase maybe_loc SysTools.runMangle dflags (map SysTools.Option mangler_opts ++ [ SysTools.FileOption "" input_fn , SysTools.FileOption "" output_fn ] ++ map SysTools.Option machdep_opts) return (next_phase, dflags, maybe_loc, output_fn) ----------------------------------------------------------------------------- -- Splitting phase runPhase SplitMangle stop dflags _basename _suff input_fn get_output_fn maybe_loc = do -- tmp_pfx is the prefix used for the split .s files -- We also use it as the file to contain the no. of split .s files (sigh) split_s_prefix <- SysTools.newTempName dflags "split" let n_files_fn = split_s_prefix SysTools.runSplit dflags [ SysTools.FileOption "" input_fn , SysTools.FileOption "" split_s_prefix , SysTools.FileOption "" n_files_fn ] -- Save the number of split files for future references s <- readFile n_files_fn let n_files = read s :: Int writeIORef v_Split_info (split_s_prefix, n_files) -- Remember to delete all these files addFilesToClean [ split_s_prefix ++ "__" ++ show n ++ ".s" | n <- [1..n_files]] return (SplitAs, dflags, maybe_loc, "**splitmangle**") -- we don't use the filename ----------------------------------------------------------------------------- -- As phase runPhase As stop dflags _basename _suff input_fn get_output_fn maybe_loc = do let as_opts = getOpts dflags opt_a let cmdline_include_paths = includePaths dflags output_fn <- get_output_fn dflags StopLn maybe_loc -- we create directories for the object file, because it -- might be a hierarchical module. createDirectoryHierarchy (directoryOf output_fn) SysTools.runAs dflags (map SysTools.Option as_opts ++ [ SysTools.Option ("-I" ++ p) | p <- cmdline_include_paths ] #ifdef sparc_TARGET_ARCH -- We only support SparcV9 and better because V8 lacks an atomic CAS -- instruction so we have to make sure that the assembler accepts the -- instruction set. Note that the user can still override this -- (e.g., -mcpu=ultrasparc). GCC picks the "best" -mcpu flag -- regardless of the ordering. -- -- This is a temporary hack. ++ [ SysTools.Option "-mcpu=v9" ] #endif ++ [ SysTools.Option "-c" , SysTools.FileOption "" input_fn , SysTools.Option "-o" , SysTools.FileOption "" output_fn ]) return (StopLn, dflags, maybe_loc, output_fn) runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc = do output_fn <- get_output_fn dflags StopLn maybe_loc let (base_o, _) = splitFilename output_fn split_odir = base_o ++ "_split" osuf = objectSuf dflags createDirectoryHierarchy split_odir -- remove M_split/ *.o, because we're going to archive M_split/ *.o -- later and we don't want to pick up any old objects. fs <- getDirectoryContents split_odir mapM_ removeFile $ map (split_odir `joinFileName`) $ filter (osuf `isSuffixOf`) fs let as_opts = getOpts dflags opt_a (split_s_prefix, n) <- readIORef v_Split_info let split_s n = split_s_prefix ++ "__" ++ show n `joinFileExt` "s" split_obj n = split_odir `joinFileName` filenameOf base_o ++ "__" ++ show n `joinFileExt` osuf let assemble_file n = SysTools.runAs dflags (map SysTools.Option as_opts ++ [ SysTools.Option "-c" , SysTools.Option "-o" , SysTools.FileOption "" (split_obj n) , SysTools.FileOption "" (split_s n) ]) mapM_ assemble_file [1..n] -- and join the split objects into a single object file: let ld_r args = SysTools.runLink dflags ([ SysTools.Option "-nostdlib", SysTools.Option "-nodefaultlibs", SysTools.Option "-Wl,-r", SysTools.Option ld_x_flag, SysTools.Option "-o", SysTools.FileOption "" output_fn ] ++ args) ld_x_flag | null cLD_X = "" | otherwise = "-Wl,-x" if cLdIsGNULd == "YES" then do let script = split_odir `joinFileName` "ld.script" writeFile script $ "INPUT(" ++ unwords (map split_obj [1..n]) ++ ")" ld_r [SysTools.FileOption "" script] else do ld_r (map (SysTools.FileOption "" . split_obj) [1..n]) return (StopLn, dflags, maybe_loc, output_fn) ----------------------------------------------------------------------------- -- MoveBinary sort-of-phase -- After having produced a binary, move it somewhere else and generate a -- wrapper script calling the binary. Currently, we need this only in -- a parallel way (i.e. in GUM), because PVM expects the binary in a -- central directory. -- This is called from linkBinary below, after linking. I haven't made it -- a separate phase to minimise interfering with other modules, and -- we don't need the generality of a phase (MoveBinary is always -- done after linking and makes only sense in a parallel setup) -- HWL runPhase_MoveBinary dflags input_fn = do let sysMan = pgm_sysman dflags pvm_root <- getEnv "PVM_ROOT" pvm_arch <- getEnv "PVM_ARCH" let pvm_executable_base = "=" ++ input_fn pvm_executable = pvm_root ++ "/bin/" ++ pvm_arch ++ "/" ++ pvm_executable_base -- nuke old binary; maybe use configur'ed names for cp and rm? Panic.try (removeFile pvm_executable) -- move the newly created binary into PVM land copy dflags "copying PVM executable" input_fn pvm_executable -- generate a wrapper script for running a parallel prg under PVM writeFile input_fn (mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan) return True -- generates a Perl skript starting a parallel prg under PVM mk_pvm_wrapper_script :: String -> String -> String -> String mk_pvm_wrapper_script pvm_executable pvm_executable_base sysMan = unlines $ [ "eval 'exec perl -S $0 ${1+\"$@\"}'", " if $running_under_some_shell;", "# =!=!=!=!=!=!=!=!=!=!=!", "# This script is automatically generated: DO NOT EDIT!!!", "# Generated by Glasgow Haskell Compiler", "# ngoqvam choHbogh vaj' vIHoHnISbej !!!!", "#", "$pvm_executable = '" ++ pvm_executable ++ "';", "$pvm_executable_base = '" ++ pvm_executable_base ++ "';", "$SysMan = '" ++ sysMan ++ "';", "", {- ToDo: add the magical shortcuts again iff we actually use them -- HWL "# first, some magical shortcuts to run "commands" on the binary", "# (which is hidden)", "if ($#ARGV == 1 && $ARGV[0] eq '+RTS' && $ARGV[1] =~ /^--((size|file|strip|rm|nm).*)/ ) {", " local($cmd) = $1;", " system("$cmd $pvm_executable");", " exit(0); # all done", "}", -} "", "# Now, run the real binary; process the args first", "$ENV{'PE'} = $pvm_executable_base;", -- ++ pvm_executable_base, "$debug = '';", "$nprocessors = 0; # the default: as many PEs as machines in PVM config", "@nonPVM_args = ();", "$in_RTS_args = 0;", "", "args: while ($a = shift(@ARGV)) {", " if ( $a eq '+RTS' ) {", " $in_RTS_args = 1;", " } elsif ( $a eq '-RTS' ) {", " $in_RTS_args = 0;", " }", " if ( $a eq '-d' && $in_RTS_args ) {", " $debug = '-';", " } elsif ( $a =~ /^-qN(\\d+)/ && $in_RTS_args ) {", " $nprocessors = $1;", " } elsif ( $a =~ /^-qp(\\d+)/ && $in_RTS_args ) {", " $nprocessors = $1;", " } else {", " push(@nonPVM_args, $a);", " }", "}", "", "local($return_val) = 0;", "# Start the parallel execution by calling SysMan", "system(\"$SysMan $debug $pvm_executable $nprocessors @nonPVM_args\");", "$return_val = $?;", "# ToDo: fix race condition moving files and flushing them!!", "system(\"cp $ENV{'HOME'}/$pvm_executable_base.???.gr .\") if -f \"$ENV{'HOME'}/$pvm_executable_base.002.gr\";", "exit($return_val);" ] ----------------------------------------------------------------------------- -- Complain about non-dynamic flags in OPTIONS pragmas checkProcessArgsResult flags filename = do when (notNull flags) (throwDyn (ProgramError ( showSDoc (hang (text filename <> char ':') 4 (text "unknown flags in {-# OPTIONS #-} pragma:" <+> hsep (map text flags))) ))) ----------------------------------------------------------------------------- -- Look for the /* GHC_PACKAGES ... */ comment at the top of a .hc file getHCFilePackages :: FilePath -> IO [PackageId] getHCFilePackages filename = Exception.bracket (openFile filename ReadMode) hClose $ \h -> do l <- hGetLine h case l of '/':'*':' ':'G':'H':'C':'_':'P':'A':'C':'K':'A':'G':'E':'S':rest -> return (map stringToPackageId (words rest)) _other -> return [] ----------------------------------------------------------------------------- -- Static linking, of .o files -- The list of packages passed to link is the list of packages on -- which this program depends, as discovered by the compilation -- manager. It is combined with the list of packages that the user -- specifies on the command line with -package flags. -- -- In one-shot linking mode, we can't discover the package -- dependencies (because we haven't actually done any compilation or -- read any interface files), so the user must explicitly specify all -- the packages. linkBinary :: DynFlags -> [FilePath] -> [PackageId] -> IO () linkBinary dflags o_files dep_packages = do let verb = getVerbFlag dflags output_fn = exeFileName dflags -- get the full list of packages to link with, by combining the -- explicit packages with the auto packages and all of their -- dependencies, and eliminating duplicates. pkg_lib_paths <- getPackageLibraryPath dflags dep_packages let pkg_lib_path_opts = concat (map get_pkg_lib_path_opts pkg_lib_paths) get_pkg_lib_path_opts l | opt_HardwireLibPaths && not opt_Static = ["-L" ++ l, "-Wl,-rpath", "-Wl," ++ l] | otherwise = ["-L" ++ l] let lib_paths = libraryPaths dflags let lib_path_opts = map ("-L"++) lib_paths pkg_link_opts <- getPackageLinkOpts dflags dep_packages #ifdef darwin_TARGET_OS framework_path_opts <- getFrameworkPathOpts dflags dep_packages pkg_frameworks <- getPackageFrameworks dflags dep_packages let framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ++ reverse (cmdlineFrameworks dflags) ] -- reverse because they're added in reverse order from the cmd line #endif -- probably _stub.o files extra_ld_inputs <- readIORef v_Ld_inputs -- opts from -optl- (including -l options) let extra_ld_opts = getOpts dflags opt_l let ways = wayNames dflags -- Here are some libs that need to be linked at the *end* of -- the command line, because they contain symbols that are referred to -- by the RTS. We can't therefore use the ordinary way opts for these. let debug_opts | WayDebug `elem` ways = [ #if defined(HAVE_LIBBFD) "-lbfd", "-liberty" #endif ] | otherwise = [] let thread_opts | WayThreaded `elem` ways = [ #if !defined(mingw32_TARGET_OS) && !defined(freebsd_TARGET_OS) "-lpthread" #endif #if defined(osf3_TARGET_OS) , "-lexc" #endif ] | otherwise = [] rc_objs <- maybeCreateManifest dflags output_fn let (md_c_flags, _) = machdepCCOpts dflags SysTools.runLink dflags ( [ SysTools.Option verb , SysTools.Option "-o" , SysTools.FileOption "" output_fn ] ++ map SysTools.Option ( md_c_flags ++ o_files ++ extra_ld_inputs ++ lib_path_opts ++ extra_ld_opts ++ rc_objs #ifdef darwin_TARGET_OS ++ framework_path_opts ++ framework_opts #endif ++ pkg_lib_path_opts ++ pkg_link_opts ++ debug_opts ++ thread_opts )) -- parallel only: move binary to another dir -- HWL when (WayPar `elem` ways) (do success <- runPhase_MoveBinary dflags output_fn if success then return () else throwDyn (InstallationError ("cannot move binary to PVM dir"))) -- options to pass to gcc and ld on macs only getFrameworkPathOpts :: DynFlags -> [PackageId] -> IO [String] getFrameworkPathOpts dflags pkgs = do ps <- getPackageFrameworkPath dflags pkgs return $ map ("-F" ++) $ ps ++ frameworkPaths dflags exeFileName :: DynFlags -> FilePath exeFileName dflags | Just s <- outputFile dflags = #if defined(mingw32_HOST_OS) if null (suffixOf s) then s `joinFileExt` "exe" else s #else s #endif | otherwise = #if defined(mingw32_HOST_OS) "main.exe" #else "a.out" #endif maybeCreateManifest :: DynFlags -> FilePath -- filename of executable -> IO [FilePath] -- extra objects to embed, maybe maybeCreateManifest dflags exe_filename = do #ifndef mingw32_TARGET_OS return [] #else if not (dopt Opt_GenManifest dflags) then return [] else do let manifest_filename = exe_filename `joinFileExt` "manifest" writeFile manifest_filename $ "\n"++ " \n"++ " \n\n"++ " \n"++ " \n"++ " \n"++ " \n"++ " \n"++ " \n"++ " \n"++ "\n" -- Windows will fine the manifest file if it is named foo.exe.manifest. -- However, for extra robustness, and so that we can move the binary around, -- we can embed the manifest in the binary itself using windres: if not (dopt Opt_EmbedManifest dflags) then return [] else do rc_filename <- newTempName dflags "rc" rc_obj_filename <- newTempName dflags (objectSuf dflags) writeFile rc_filename $ "1 24 MOVEABLE PURE " ++ show manifest_filename ++ "\n" -- magic numbers :-) -- show is a bit hackish above, but we need to esacpe the -- backslashes in the path. let wr_opts = getOpts dflags opt_windres runWindres dflags $ map SysTools.Option $ ["--input="++rc_filename, "--output="++rc_obj_filename, "--output-format=coff"] ++ wr_opts -- no FileOptions here: windres doesn't like seeing -- backslashes, apparently return [rc_obj_filename] #endif linkDynLib :: DynFlags -> [String] -> [PackageId] -> IO () linkDynLib dflags o_files dep_packages = do let verb = getVerbFlag dflags let static = opt_Static let no_hs_main = dopt Opt_NoHsMain dflags let o_file = outputFile dflags pkg_lib_paths <- getPackageLibraryPath dflags dep_packages let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths let lib_paths = libraryPaths dflags let lib_path_opts = map ("-L"++) lib_paths pkg_link_opts <- getPackageLinkOpts dflags dep_packages -- probably _stub.o files extra_ld_inputs <- readIORef v_Ld_inputs let (md_c_flags, _) = machdepCCOpts dflags let extra_ld_opts = getOpts dflags opt_l #if defined(mingw32_HOST_OS) ----------------------------------------------------------------------------- -- Making a DLL ----------------------------------------------------------------------------- let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; } SysTools.runLink dflags ([ SysTools.Option verb , SysTools.Option "-o" , SysTools.FileOption "" output_fn , SysTools.Option "-shared" , SysTools.FileOption "-Wl,--out-implib=" (output_fn ++ ".a") ] ++ map (SysTools.FileOption "") o_files ++ map SysTools.Option ( md_c_flags ++ extra_ld_inputs ++ lib_path_opts ++ extra_ld_opts ++ pkg_lib_path_opts ++ pkg_link_opts )) #elif defined(darwin_TARGET_OS) ----------------------------------------------------------------------------- -- Making a darwin dylib ----------------------------------------------------------------------------- -- About the options used for Darwin: -- -dynamiclib -- Apple's way of saying -shared -- -undefined dynamic_lookup: -- Without these options, we'd have to specify the correct dependencies -- for each of the dylibs. Note that we could (and should) do without this -- for all libraries except the RTS; all we need to do is to pass the -- correct HSfoo_dyn.dylib files to the link command. -- This feature requires Mac OS X 10.3 or later; there is a similar feature, -- -flat_namespace -undefined suppress, which works on earlier versions, -- but it has other disadvantages. -- -single_module -- Build the dynamic library as a single "module", i.e. no dynamic binding -- nonsense when referring to symbols from within the library. The NCG -- assumes that this option is specified (on i386, at least). -- -Wl,-macosx_version_min -Wl,10.3 -- Tell the linker its safe to assume that the library will run on 10.3 or -- later, so that it will not complain about the use of the option -- -undefined dynamic_lookup above. -- -install_name -- Causes the dynamic linker to ignore the DYLD_LIBRARY_PATH when loading -- this lib and instead look for it at its absolute path. -- When installing the .dylibs (see target.mk), we'll change that path to -- point to the place they are installed. Therefore, we won't have to set -- up DYLD_LIBRARY_PATH specifically for ghc. ----------------------------------------------------------------------------- let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; } pwd <- getCurrentDirectory SysTools.runLink dflags ([ SysTools.Option verb , SysTools.Option "-dynamiclib" , SysTools.Option "-o" , SysTools.FileOption "" output_fn ] ++ map SysTools.Option ( md_c_flags ++ o_files ++ [ "-undefined", "dynamic_lookup", "-single_module", "-Wl,-macosx_version_min","-Wl,10.3", "-install_name " ++ (pwd `joinFileName` output_fn) ] ++ extra_ld_inputs ++ lib_path_opts ++ extra_ld_opts ++ pkg_lib_path_opts ++ pkg_link_opts )) #else ----------------------------------------------------------------------------- -- Making a DSO ----------------------------------------------------------------------------- let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; } SysTools.runLink dflags ([ SysTools.Option verb , SysTools.Option "-o" , SysTools.FileOption "" output_fn ] ++ map SysTools.Option ( md_c_flags ++ o_files ++ [ "-shared", "-Wl,-Bsymbolic" ] -- we need symbolic linking to resolve non-PIC intra-package-relocations ++ extra_ld_inputs ++ lib_path_opts ++ extra_ld_opts ++ pkg_lib_path_opts ++ pkg_link_opts )) #endif -- ----------------------------------------------------------------------------- -- Running CPP doCpp :: DynFlags -> Bool -> Bool -> FilePath -> FilePath -> IO () doCpp dflags raw include_cc_opts input_fn output_fn = do let hscpp_opts = getOpts dflags opt_P let cmdline_include_paths = includePaths dflags pkg_include_dirs <- getPackageIncludePath dflags [] let include_paths = foldr (\ x xs -> "-I" : x : xs) [] (cmdline_include_paths ++ pkg_include_dirs) let verb = getVerbFlag dflags let cc_opts | not include_cc_opts = [] | otherwise = (optc ++ md_c_flags) where optc = getOpts dflags opt_c (md_c_flags, _) = machdepCCOpts dflags let cpp_prog args | raw = SysTools.runCpp dflags args | otherwise = SysTools.runCc dflags (SysTools.Option "-E" : args) let target_defs = [ "-D" ++ HOST_OS ++ "_BUILD_OS=1", "-D" ++ HOST_ARCH ++ "_BUILD_ARCH=1", "-D" ++ TARGET_OS ++ "_HOST_OS=1", "-D" ++ TARGET_ARCH ++ "_HOST_ARCH=1" ] -- remember, in code we *compile*, the HOST is the same our TARGET, -- and BUILD is the same as our HOST. cpp_prog ([SysTools.Option verb] ++ map SysTools.Option include_paths ++ map SysTools.Option hsSourceCppOpts ++ map SysTools.Option hscpp_opts ++ map SysTools.Option cc_opts ++ map SysTools.Option target_defs ++ [ SysTools.Option "-x" , SysTools.Option "c" , SysTools.Option input_fn -- We hackily use Option instead of FileOption here, so that the file -- name is not back-slashed on Windows. cpp is capable of -- dealing with / in filenames, so it works fine. Furthermore -- if we put in backslashes, cpp outputs #line directives -- with *double* backslashes. And that in turn means that -- our error messages get double backslashes in them. -- In due course we should arrange that the lexer deals -- with these \\ escapes properly. , SysTools.Option "-o" , SysTools.FileOption "" output_fn ]) cHaskell1Version = "5" -- i.e., Haskell 98 -- Default CPP defines in Haskell source hsSourceCppOpts = [ "-D__HASKELL1__="++cHaskell1Version , "-D__GLASGOW_HASKELL__="++cProjectVersionInt , "-D__HASKELL98__" , "-D__CONCURRENT_HASKELL__" ] -- ----------------------------------------------------------------------------- -- Misc. hscNextPhase :: DynFlags -> HscSource -> HscTarget -> Phase hscNextPhase dflags HsBootFile hsc_lang = StopLn hscNextPhase dflags other hsc_lang = case hsc_lang of HscC -> HCc HscAsm | dopt Opt_SplitObjs dflags -> SplitMangle | otherwise -> As HscNothing -> StopLn HscInterpreted -> StopLn _other -> StopLn hscMaybeAdjustTarget :: DynFlags -> Phase -> HscSource -> HscTarget -> HscTarget hscMaybeAdjustTarget dflags stop other current_hsc_lang = hsc_lang where keep_hc = dopt Opt_KeepHcFiles dflags hsc_lang -- don't change the lang if we're interpreting | current_hsc_lang == HscInterpreted = current_hsc_lang -- force -fvia-C if we are being asked for a .hc file | HCc <- stop = HscC | keep_hc = HscC -- otherwise, stick to the plan | otherwise = current_hsc_lang GLOBAL_VAR(v_Split_info, ("",0), (String,Int)) -- The split prefix and number of files