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Diffstat (limited to 'compiler/main/DriverPipeline.hs')
| -rw-r--r-- | compiler/main/DriverPipeline.hs | 1405 |
1 files changed, 1405 insertions, 0 deletions
diff --git a/compiler/main/DriverPipeline.hs b/compiler/main/DriverPipeline.hs new file mode 100644 index 0000000000..e20bc56940 --- /dev/null +++ b/compiler/main/DriverPipeline.hs @@ -0,0 +1,1405 @@ +----------------------------------------------------------------------------- +-- +-- 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 + staticLink, + + -- Interfaces for the compilation manager (interpreted/batch-mode) + preprocess, + compile, CompResult(..), + link, + + -- DLL building + doMkDLL, + + ) where + +#include "HsVersions.h" + +import Packages +import HeaderInfo +import DriverPhases +import SysTools ( newTempName, addFilesToClean, getSysMan, copy ) +import qualified SysTools +import HscMain +import Finder +import HscTypes +import Outputable +import Module +import ErrUtils +import DynFlags +import StaticFlags ( v_Ld_inputs, opt_Static, 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 EXCEPTION +import DATA_IOREF ( readIORef, writeIORef, IORef ) +import GLAEXTS ( Int(..) ) + +import Directory +import System +import IO +import Monad +import Data.List ( isSuffixOf ) +import Maybe + + +-- --------------------------------------------------------------------------- +-- 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) 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 dflags next_phase + Temporary basename next_phase (Just location) + + let dflags' = dflags { hscTarget = hsc_lang, + hscOutName = output_fn, + extCoreName = basename ++ ".hcr" } + + -- -no-recomp should also work with --make + let do_recomp = dopt Opt_RecompChecking dflags + source_unchanged = isJust maybe_old_linkable && do_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 + = 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) 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, iface, details) + = do stub_unlinked <- getStubLinkable hasStub + let hs_unlinked = [BCOs comp_bc] + 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 | not (isHsBoot src_flavour) -- We can't compile boot files to + -- bytecode so don't even try. + -> 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 mod location + runPipeline StopLn dflags (stub_c,Nothing) + (SpecificFile stub_o) Nothing{-no ModLocation-} + + return stub_o + + +-- --------------------------------------------------------------------------- +-- Link + +link :: GhcMode -- 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 Interactive dflags batch_attempt_linking hpt + = do -- Not Linking...(demand linker will do the job) + return Succeeded +#endif + +link JustTypecheck dflags batch_attempt_linking hpt + = return Succeeded + +link BatchCompile dflags batch_attempt_linking hpt + | batch_attempt_linking + = do + let + home_mod_infos = moduleEnvElts 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 ..." $$ vcat (map ppr linkables)) + + -- check for the -no-link flag + if isNoLink (ghcLink dflags) + then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).") + return Succeeded + else do + + let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us) + obj_files = concatMap getOfiles linkables + + exe_file = exeFileName dflags + + -- if the modification time on the executable is later than the + -- modification times on all of the objects, then omit linking + -- (unless the -no-recomp flag was given). + e_exe_time <- IO.try $ getModificationTime exe_file + let linking_needed + | Left _ <- e_exe_time = True + | Right t <- e_exe_time = + any (t <) (map linkableTime linkables) + + if dopt Opt_RecompChecking dflags && not linking_needed + then do debugTraceMsg dflags 1 (text exe_file <+> ptext SLIT("is up to date, linking not required.")) + return Succeeded + else do + + debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file + <+> text "...") + + -- Don't showPass in Batch mode; doLink will do that for us. + let link = case ghcLink dflags of + MkDLL -> doMkDLL + StaticLink -> staticLink + link dflags obj_files pkg_deps + + debugTraceMsg dflags 3 (text "link: done") + + -- staticLink only returns if it succeeds + return Succeeded + + | otherwise + = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$ + 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) 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 () + StaticLink -> staticLink dflags o_files link_pkgs + MkDLL -> doMkDLL dflags o_files link_pkgs + where + -- Always link in the haskell98 package for static linking. Other + -- packages have to be specified via the -package flag. + link_pkgs + | ExtPackage h98_id <- haskell98PackageId (pkgState dflags) = [h98_id] + | otherwise = [] + + +-- --------------------------------------------------------------------------- +-- 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) + -> PipelineOutput -- Output filename + -> Maybe ModLocation -- A ModLocation, if this is a Haskell module + -> IO (DynFlags, FilePath) -- (final flags, output filename) + +runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc + = do + let (basename, suffix) = splitFilename input_fn + + -- If we were given a -x flag, then use that phase to start from + start_phase + | Just x_phase <- mb_phase = x_phase + | otherwise = startPhase suffix + + -- 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 dflags 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. + case output of + Temporary -> + return (dflags', output_fn) + _other -> + do final_fn <- get_output_fn stop_phase maybe_loc + when (final_fn /= output_fn) $ + copy dflags ("Copying `" ++ output_fn ++ "' to `" ++ final_fn + ++ "'") output_fn final_fn + return (dflags', final_fn) + + + +pipeLoop :: DynFlags -> Phase -> Phase + -> FilePath -> String -> Suffix + -> (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 + :: DynFlags -> Phase -> PipelineOutput -> String + -> Phase{-next phase-} -> Maybe ModLocation -> IO FilePath +getOutputFilename dflags stop_phase output basename + = func + 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 + + func 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 + 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. + -> (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 (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 (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 (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 import 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) <- + case src_flavour of + ExtCoreFile -> do { -- no explicit imports in ExtCore input. + ; m <- getCoreModuleName input_fn + ; return (Nothing, mkModule m) } + + other -> do { buf <- hGetStringBuffer input_fn + ; (_,_,L _ mod_name) <- getImports dflags buf input_fn + ; return (Just buf, mod_name) } + + -- 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 + + -- Make the ModSummary to hand to hscMain + src_timestamp <- getModificationTime (basename `joinFileExt` suff) + let + unused_field = panic "runPhase:ModSummary field" + -- Some fields are not looked at by hscMain + mod_summary = ModSummary { ms_mod = mod_name, + 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 = unused_field, + ms_srcimps = unused_field } + + 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. + let do_recomp = dopt Opt_RecompChecking dflags + source_unchanged <- + if not do_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 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 + addHomeModuleToFinder hsc_env mod_name location4 + + -- 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_name 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 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 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` 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) + + let (md_c_flags, md_regd_c_flags) = machdepCCOpts 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 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", SysTools.Option "c"] ++ + [ SysTools.FileOption "" input_fn + , SysTools.Option "-o" + , SysTools.FileOption "" output_fn + ] + ++ map SysTools.Option ( + md_c_flags + ++ pic_c_flags + ++ (if hcc && mangle + then md_regd_c_flags + else []) + ++ (if hcc + then more_hcc_opts + else []) + ++ [ verb, "-S", "-Wimplicit", cc_opt ] + ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ] + ++ cc_opts + ++ split_opt + ++ include_paths + ++ 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 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 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 ] + ++ [ 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 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 staticLink 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 input_fn + = do + sysMan <- getSysMan + 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? + system ("rm -f " ++ pvm_executable) + -- move the newly created binary into PVM land + system ("cp -p " ++ 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. + +staticLink :: DynFlags -> [FilePath] -> [PackageId] -> IO () +staticLink 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 = 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 + +#ifdef darwin_TARGET_OS + pkg_framework_paths <- getPackageFrameworkPath dflags dep_packages + let pkg_framework_path_opts = map ("-F"++) pkg_framework_paths + + let framework_paths = frameworkPaths dflags + framework_path_opts = map ("-F"++) framework_paths + + pkg_frameworks <- getPackageFrameworks dflags dep_packages + let pkg_framework_opts = concat [ ["-framework", fw] | fw <- pkg_frameworks ] + + let frameworks = cmdlineFrameworks dflags + framework_opts = concat [ ["-framework", fw] | fw <- reverse frameworks ] + -- 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-<blah> (including -l<blah> 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 = [] + + 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 +#ifdef darwin_TARGET_OS + ++ framework_path_opts + ++ framework_opts +#endif + ++ pkg_lib_path_opts + ++ pkg_link_opts +#ifdef darwin_TARGET_OS + ++ pkg_framework_path_opts + ++ pkg_framework_opts +#endif + ++ debug_opts + ++ thread_opts + )) + + -- parallel only: move binary to another dir -- HWL + when (WayPar `elem` ways) + (do success <- runPhase_MoveBinary output_fn + if success then return () + else throwDyn (InstallationError ("cannot move binary to PVM dir"))) + + +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 + +----------------------------------------------------------------------------- +-- Making a DLL (only for Win32) + +doMkDLL :: DynFlags -> [String] -> [PackageId] -> IO () +doMkDLL 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 + let output_fn = case o_file of { Just s -> s; Nothing -> "HSdll.dll"; } + + 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 + + -- opts from -optdll-<blah> + let extra_ld_opts = getOpts dflags opt_dll + + let pstate = pkgState dflags + rts_id | ExtPackage id <- rtsPackageId pstate = id + | otherwise = panic "staticLink: rts package missing" + base_id | ExtPackage id <- basePackageId pstate = id + | otherwise = panic "staticLink: base package missing" + rts_pkg = getPackageDetails pstate rts_id + base_pkg = getPackageDetails pstate base_id + + let extra_os = if static || no_hs_main + then [] + else [ head (libraryDirs rts_pkg) ++ "/Main.dll_o", + head (libraryDirs base_pkg) ++ "/PrelMain.dll_o" ] + + let (md_c_flags, _) = machdepCCOpts dflags + SysTools.runMkDLL dflags + ([ SysTools.Option verb + , SysTools.Option "-o" + , SysTools.FileOption "" output_fn + ] + ++ map SysTools.Option ( + md_c_flags + ++ o_files + ++ extra_os + ++ [ "--target=i386-mingw32" ] + ++ extra_ld_inputs + ++ lib_path_opts + ++ extra_ld_opts + ++ pkg_lib_path_opts + ++ pkg_link_opts + ++ (if "--def" `elem` (concatMap words extra_ld_opts) + then [ "" ] + else [ "--export-all" ]) + )) + +-- ----------------------------------------------------------------------------- +-- 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 HsBootFile current_hsc_lang + = HscNothing -- No output (other than Foo.hi-boot) for hs-boot files +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 |