X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FDriverPipeline.hs;h=039c18a0562f4f0569c34736769bb2ff2f5b3de8;hb=91546ebde962f7a7e88073118e433f727b3080c8;hp=75c266117b4cefec8fec99e765cee9aa4673ceeb;hpb=6720aae478aeffab9d93b33b76e8718130cd4a7b;p=ghc-hetmet.git diff --git a/ghc/compiler/main/DriverPipeline.hs b/ghc/compiler/main/DriverPipeline.hs index 75c2661..039c18a 100644 --- a/ghc/compiler/main/DriverPipeline.hs +++ b/ghc/compiler/main/DriverPipeline.hs @@ -9,7 +9,7 @@ module DriverPipeline ( -- Run a series of compilation steps in a pipeline, for a -- collection of source files. - oneShot, + oneShot, compileFile, -- Interfaces for the batch-mode driver staticLink, @@ -22,7 +22,8 @@ module DriverPipeline ( -- DLL building doMkDLL, - matchOptions, -- used in module GHC + getOptionsFromStringBuffer, -- used in module GHC + optionsErrorMsgs, -- ditto ) where #include "HsVersions.h" @@ -41,18 +42,24 @@ import ErrUtils import DynFlags import StaticFlags ( v_Ld_inputs, opt_Static, WayName(..) ) import Config -import RdrName ( GlobalRdrEnv ) import Panic import Util import StringBuffer ( hGetStringBuffer ) import BasicTypes ( SuccessFlag(..) ) import Maybes ( expectJust ) import Ctype ( is_ident ) +import StringBuffer ( StringBuffer(..), lexemeToString ) +import ParserCoreUtils ( getCoreModuleName ) +import SrcLoc ( srcLocSpan, mkSrcLoc ) +import FastString ( mkFastString ) +import Bag ( listToBag, emptyBag ) +import SrcLoc ( Located(..) ) -import ParserCoreUtils ( getCoreModuleName ) +import Distribution.Compiler ( extensionsToGHCFlag ) import EXCEPTION import DATA_IOREF ( readIORef, writeIORef, IORef ) +import GLAEXTS ( Int(..) ) import Directory import System @@ -70,10 +77,10 @@ import Maybe -- We return the augmented DynFlags, because they contain the result -- of slurping in the OPTIONS pragmas -preprocess :: DynFlags -> FilePath -> IO (DynFlags, FilePath) -preprocess dflags filename = - ASSERT2(isHaskellSrcFilename filename, text filename) - runPipeline anyHsc dflags filename Temporary Nothing{-no ModLocation-} +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 @@ -91,6 +98,7 @@ compile :: HscEnv -> ModSummary -> Maybe Linkable -- Just linkable <=> source unchanged -> Maybe ModIface -- Old interface, if available + -> Int -> Int -> IO CompResult data CompResult @@ -101,7 +109,7 @@ data CompResult | CompErrs -compile hsc_env mod_summary maybe_old_linkable old_iface = do +compile hsc_env mod_summary maybe_old_linkable old_iface mod_index nmods = do let dflags0 = hsc_dflags hsc_env this_mod = ms_mod mod_summary @@ -113,19 +121,22 @@ compile hsc_env mod_summary maybe_old_linkable old_iface = do showPass dflags0 ("Compiling " ++ showModMsg have_object mod_summary) - let verb = verbosity dflags0 let location = ms_location mod_summary let input_fn = expectJust "compile:hs" (ml_hs_file location) let input_fnpp = expectJust "compile:hspp" (ms_hspp_file mod_summary) - when (verb >= 2) (hPutStrLn stderr ("compile: input file " ++ input_fnpp)) + debugTraceMsg dflags0 2 (text "compile: input file" <+> text input_fnpp) -- Add in the OPTIONS from the source file -- This is nasty: we've done this once already, in the compilation manager -- It might be better to cache the flags in the ml_hspp_file field,say - opts <- getOptionsFromSource input_fnpp - (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 opts - checkProcessArgsResult unhandled_flags input_fn + let hspp_buf = expectJust "compile:hspp_buf" (ms_hspp_buf mod_summary) + opts = getOptionsFromStringBuffer hspp_buf input_fn + (dflags1,unhandled_flags) <- parseDynamicFlags dflags0 (map snd opts) + if (not (null unhandled_flags)) + then do printErrorsAndWarnings dflags1 (optionsErrorMsgs unhandled_flags opts input_fn) + return CompErrs + else do let (basename, _) = splitFilename input_fn @@ -146,18 +157,18 @@ compile hsc_env mod_summary maybe_old_linkable old_iface = do let dflags' = dflags { hscTarget = hsc_lang, hscOutName = output_fn, - hscStubCOutName = basename ++ "_stub.c", - hscStubHOutName = basename ++ "_stub.h", 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 -- run the compiler - hsc_result <- hscMain hsc_env' printErrorsAndWarnings mod_summary + hsc_result <- hscMain hsc_env' mod_summary source_unchanged have_object old_iface + (Just (mod_index, nmods)) case hsc_result of HscFail -> return CompErrs @@ -166,27 +177,31 @@ compile hsc_env mod_summary maybe_old_linkable old_iface = do ASSERT(isJust maybe_old_linkable) return (CompOK details iface maybe_old_linkable) - HscRecomp details iface - stub_h_exists stub_c_exists maybe_interpreted_code + HscRecomp details iface stub_h_exists stub_c_exists maybe_interpreted_code | isHsBoot src_flavour -- No further compilation to do - -> return (CompOK details iface Nothing) + -> do case hsc_lang of + HscInterpreted -> return () + _other -> SysTools.touch dflags' "Touching object file" + object_filename + return (CompOK details iface Nothing) - | otherwise -- Normal Haskell source files + | otherwise -- Normal source file -> do - let - maybe_stub_o <- compileStub dflags' stub_c_exists - let stub_unlinked = case maybe_stub_o of - Nothing -> [] - Just stub_o -> [ DotO stub_o ] + stub_unlinked <- + if stub_c_exists then do + stub_o <- compileStub dflags' this_mod location + return [ DotO stub_o ] + else + return [] (hs_unlinked, unlinked_time) <- case hsc_lang of -- in interpreted mode, just return the compiled code -- as our "unlinked" object. - HscInterpreted -> - case maybe_interpreted_code of + HscInterpreted + -> case maybe_interpreted_code of #ifdef GHCI Just comp_bc -> return ([BCOs comp_bc], ms_hs_date mod_summary) -- Why do we use the timestamp of the source file here, @@ -198,16 +213,17 @@ compile hsc_env mod_summary maybe_old_linkable old_iface = do #endif Nothing -> panic "compile: no interpreted code" - -- we're in batch mode: finish the compilation pipeline. - _other -> do - let object_filename = ml_obj_file location + HscNothing + -> return ([], ms_hs_date mod_summary) - runPipeline StopLn dflags output_fn Persistent - (Just location) - -- the object filename comes from the ModLocation + -- 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) + o_time <- getModificationTime object_filename + return ([DotO object_filename], o_time) let linkable = LM unlinked_time this_mod (hs_unlinked ++ stub_unlinked) @@ -217,14 +233,33 @@ compile hsc_env mod_summary maybe_old_linkable old_iface = do ----------------------------------------------------------------------------- -- stub .h and .c files (for foreign export support) -compileStub dflags stub_c_exists - | not stub_c_exists = return Nothing - | stub_c_exists = do +-- 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 = hscStubCOutName dflags - (_, stub_o) <- runPipeline StopLn dflags - stub_c Persistent Nothing{-no ModLocation-} - return (Just stub_o) + let (stub_c,_) = mkStubPaths dflags mod location + runPipeline StopLn dflags (stub_c,Nothing) + (SpecificFile stub_o) Nothing{-no ModLocation-} + + return stub_o -- --------------------------------------------------------------------------- @@ -249,6 +284,9 @@ link Interactive dflags batch_attempt_linking hpt return Succeeded #endif +link JustTypecheck dflags batch_attempt_linking hpt + = return Succeeded + link BatchCompile dflags batch_attempt_linking hpt | batch_attempt_linking = do @@ -261,50 +299,63 @@ link BatchCompile dflags batch_attempt_linking hpt -- the linkables to link linkables = map (fromJust.hm_linkable) home_mod_infos - when (verb >= 3) $ do - hPutStrLn stderr "link: linkables are ..." - hPutStrLn stderr (showSDoc (vcat (map ppr linkables))) + debugTraceMsg dflags 3 (text "link: linkables are ..." $$ vcat (map ppr linkables)) -- check for the -no-link flag if isNoLink (ghcLink dflags) - then do when (verb >= 3) $ - hPutStrLn stderr "link(batch): linking omitted (-c flag given)." + then do debugTraceMsg dflags 3 (text "link(batch): linking omitted (-c flag given).") return Succeeded else do - when (verb >= 1) $ - hPutStrLn stderr "Linking ..." - let getOfiles (LM _ _ us) = map nameOfObject (filter isObject us) obj_files = concatMap getOfiles linkables + exe_file = exeFileName dflags + + -- if the modification time on the executable is later than the + -- modification times on all of the objects, then omit linking + -- (unless the -no-recomp flag was given). + e_exe_time <- IO.try $ getModificationTime exe_file + let linking_needed + | Left _ <- e_exe_time = True + | Right t <- e_exe_time = + any (t <) (map linkableTime linkables) + + if dopt Opt_RecompChecking dflags && not linking_needed + then do debugTraceMsg dflags 1 (text exe_file <+> ptext SLIT("is up to date, linking not required.")) + return Succeeded + else do + + debugTraceMsg dflags 1 (ptext SLIT("Linking") <+> text exe_file + <+> text "...") + -- Don't showPass in Batch mode; doLink will do that for us. - staticLink dflags obj_files pkg_deps + let link = case ghcLink dflags of + MkDLL -> doMkDLL + StaticLink -> staticLink + link dflags obj_files pkg_deps - when (verb >= 3) (hPutStrLn stderr "link: done") + debugTraceMsg dflags 3 (text "link: done") -- staticLink only returns if it succeeds return Succeeded | otherwise - = do when (verb >= 3) $ do - hPutStrLn stderr "link(batch): upsweep (partially) failed OR" - hPutStrLn stderr " Main.main not exported; not linking." + = do debugTraceMsg dflags 3 (text "link(batch): upsweep (partially) failed OR" $$ + text " Main.main not exported; not linking.") return Succeeded - where - verb = verbosity dflags -- ----------------------------------------------------------------------------- -- Compile files in one-shot mode. -oneShot :: DynFlags -> Phase -> [String] -> IO () +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 -> IO FilePath -compileFile dflags stop_phase src = do +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)) @@ -328,7 +379,7 @@ compileFile dflags stop_phase src = do other -> stop_phase (_, out_file) <- runPipeline stop_phase' dflags - src output Nothing{-no ModLocation-} + (src, mb_phase) output Nothing{-no ModLocation-} return out_file @@ -373,17 +424,21 @@ data PipelineOutput -- the output must go into the specified file. runPipeline - :: Phase -- When to stop - -> DynFlags -- Dynamic flags - -> FilePath -- Input filename - -> PipelineOutput -- Output filename - -> Maybe ModLocation -- A ModLocation, if this is a Haskell module + :: 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 output maybe_loc +runPipeline stop_phase dflags (input_fn, mb_phase) output maybe_loc = do let (basename, suffix) = splitFilename input_fn - start_phase = startPhase suffix + + -- 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 @@ -457,7 +512,7 @@ getOutputFilename dflags stop_phase output basename = func where hcsuf = hcSuf dflags - odir = outputDir dflags + odir = objectDir dflags osuf = objectSuf dflags keep_hc = dopt Opt_KeepHcFiles dflags keep_raw_s = dopt Opt_KeepRawSFiles dflags @@ -491,11 +546,11 @@ getOutputFilename dflags stop_phase output basename | StopLn <- next_phase = return odir_persistent | otherwise = return persistent - persistent = basename ++ '.':suffix + persistent = basename `joinFileExt` suffix odir_persistent | Just loc <- maybe_location = ml_obj_file loc - | Just d <- odir = replaceFilenameDirectory persistent d + | Just d <- odir = d `joinFileName` persistent | otherwise = persistent @@ -552,7 +607,7 @@ runPhase (Unlit sf) _stop dflags _basename _suff input_fn get_output_fn maybe_lo runPhase (Cpp sf) _stop dflags0 basename suff input_fn get_output_fn maybe_loc = do src_opts <- getOptionsFromSource input_fn (dflags,unhandled_flags) <- parseDynamicFlags dflags0 src_opts - checkProcessArgsResult unhandled_flags (basename++'.':suff) + checkProcessArgsResult unhandled_flags (basename `joinFileExt` suff) if not (dopt Opt_Cpp dflags) then -- no need to preprocess CPP, just pass input file along @@ -573,7 +628,7 @@ runPhase (HsPp sf) _stop dflags basename suff input_fn get_output_fn maybe_loc return (Hsc sf, dflags, maybe_loc, input_fn) else do let hspp_opts = getOpts dflags opt_F - let orig_fn = basename ++ '.':suff + let orig_fn = basename `joinFileExt` suff output_fn <- get_output_fn (Hsc sf) maybe_loc SysTools.runPp dflags ( [ SysTools.Option orig_fn @@ -608,7 +663,7 @@ runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _ma ; return (Nothing, mkModule m) } other -> do { buf <- hGetStringBuffer input_fn - ; (_,_,mod_name) <- getImports dflags buf input_fn + ; (_,_,L _ mod_name) <- getImports dflags buf input_fn ; return (Just buf, mod_name) } -- Build a ModLocation to pass to hscMain. @@ -643,7 +698,7 @@ runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _ma | otherwise = location3 -- Make the ModSummary to hand to hscMain - src_timestamp <- getModificationTime (basename ++ '.':suff) + src_timestamp <- getModificationTime (basename `joinFileExt` suff) let unused_field = panic "runPhase:ModSummary field" -- Some fields are not looked at by hscMain @@ -690,8 +745,6 @@ runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _ma let dflags' = dflags { hscTarget = hsc_lang, hscOutName = output_fn, - hscStubCOutName = basename ++ "_stub.c", - hscStubHOutName = basename ++ "_stub.h", extCoreName = basename ++ ".hcr" } hsc_env <- newHscEnv dflags' @@ -700,10 +753,11 @@ runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _ma addHomeModuleToFinder hsc_env mod_name location4 -- run the compiler! - result <- hscMain hsc_env printErrorsAndWarnings + result <- hscMain hsc_env mod_summary source_unchanged False -- No object file Nothing -- No iface + Nothing -- No "module i of n" progress info case result of @@ -711,17 +765,18 @@ runPhase (Hsc src_flavour) stop dflags0 basename suff input_fn get_output_fn _ma HscNoRecomp details iface -> 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) HscRecomp _details _iface stub_h_exists stub_c_exists _maybe_interpreted_code -> do - -- Deal with stubs - maybe_stub_o <- compileStub dflags' stub_c_exists - case maybe_stub_o of - Nothing -> return () - Just stub_o -> consIORef v_Ld_inputs stub_o + when stub_c_exists $ 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 @@ -748,8 +803,6 @@ runPhase Cmm stop dflags basename suff input_fn get_output_fn maybe_loc let dflags' = dflags { hscTarget = hsc_lang, hscOutName = output_fn, - hscStubCOutName = basename ++ "_stub.c", - hscStubHOutName = basename ++ "_stub.h", extCoreName = basename ++ ".hcr" } ok <- hscCmmFile dflags' input_fn @@ -794,6 +847,9 @@ runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc let excessPrecision = dopt Opt_ExcessPrecision dflags + let cc_opt | optLevel dflags >= 2 = "-O2" + | otherwise = "-O" + -- Decide next phase let mangle = dopt Opt_DoAsmMangling dflags @@ -802,12 +858,29 @@ runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc | otherwise = As output_fn <- get_output_fn next_phase maybe_loc - -- force the C compiler to interpret this file as C when - -- compiling .hc files, by adding the -x c option. - let langopt | hcc = [ SysTools.Option "-x", SysTools.Option "c"] - | otherwise = [ ] + 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 (langopt ++ + 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 @@ -818,11 +891,13 @@ runPhase cc_phase stop dflags basename suff input_fn get_output_fn maybe_loc ++ (if hcc && mangle then md_regd_c_flags else []) - ++ [ verb, "-S", "-Wimplicit", "-O" ] + ++ (if hcc + then more_hcc_opts + else []) + ++ [ verb, "-S", "-Wimplicit", cc_opt ] ++ [ "-D__GLASGOW_HASKELL__="++cProjectVersionInt ] ++ cc_opts ++ split_opt - ++ (if excessPrecision then [] else [ "-ffloat-store" ]) ++ include_paths ++ pkg_extra_cc_opts )) @@ -915,7 +990,7 @@ runPhase SplitAs stop dflags basename _suff _input_fn get_output_fn maybe_loc (split_s_prefix, n) <- readIORef v_Split_info let real_odir - | Just d <- outputDir dflags = d + | Just d <- objectDir dflags = d | otherwise = basename ++ "_split" let assemble_file n @@ -1061,18 +1136,12 @@ getHCFilePackages filename = 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. - let o_file = outputFile dflags -#if defined(mingw32_HOST_OS) - let output_fn = case o_file of { Just s -> s; Nothing -> "main.exe"; } -#else - let output_fn = case o_file of { Just s -> s; Nothing -> "a.out"; } -#endif - pkg_lib_paths <- getPackageLibraryPath dflags dep_packages let pkg_lib_path_opts = map ("-L"++) pkg_lib_paths @@ -1158,6 +1227,24 @@ staticLink dflags o_files dep_packages = do 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) @@ -1283,14 +1370,19 @@ hsSourceCppOpts = ----------------------------------------------------------------------------- -- Reading OPTIONS pragmas +-- This is really very ugly and should be rewritten. +-- - some error messages are thrown as exceptions (should return) +-- - we ignore LINE pragmas +-- - parsing is horrible, combination of prefixMatch and 'read'. + getOptionsFromSource :: String -- input file -> IO [String] -- options, if any getOptionsFromSource file = do h <- openFile file ReadMode - look h `finally` hClose h + look h 1 `finally` hClose h where - look h = do + look h i = do r <- tryJust ioErrors (hGetLine h) case r of Left e | isEOFError e -> return [] @@ -1298,40 +1390,91 @@ getOptionsFromSource file Right l' -> do let l = removeSpaces l' case () of - () | null l -> look h - | prefixMatch "#" l -> look h - | prefixMatch "{-# LINE" l -> look h -- -} - | Just opts <- matchOptions l - -> do rest <- look h + () | null l -> look h (i+1) + | prefixMatch "#" l -> look h (i+1) + | prefixMatch "{-# LINE" l -> look h (i+1) -- -} wrong! + | Just opts <- matchOptions i file l + -> do rest <- look h (i+1) return (opts ++ rest) | otherwise -> return [] +getOptionsFromStringBuffer :: StringBuffer -> FilePath -> [(Int,String)] +getOptionsFromStringBuffer buffer@(StringBuffer _ len _) fn = + let + ls = lines (lexemeToString buffer len) -- lazy, so it's ok + in + look 1 ls + where + look i [] = [] + look i (l':ls) = do + let l = removeSpaces l' + case () of + () | null l -> look (i+1) ls + | prefixMatch "#" l -> look (i+1) ls + | prefixMatch "{-# LINE" l -> look (i+1) ls -- -} wrong! + | Just opts <- matchOptions i fn l + -> zip (repeat i) opts ++ look (i+1) ls + | otherwise -> [] + -- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS -- instead of OPTIONS_GHC, but that is deprecated. -matchOptions s +matchOptions i fn s | Just s1 <- maybePrefixMatch "{-#" s -- -} - = matchOptions1 (removeSpaces s1) + = matchOptions1 i fn (removeSpaces s1) | otherwise = Nothing where - matchOptions1 s + matchOptions1 i fn s | Just s2 <- maybePrefixMatch "OPTIONS" s = case () of _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3)) - -> matchOptions2 s3 + -> matchOptions2 i fn s3 | not (is_ident (head s2)) - -> matchOptions2 s2 + -> matchOptions2 i fn s2 | otherwise -> Just [] -- OPTIONS_anything is ignored, not treated as start of source | Just s2 <- maybePrefixMatch "INCLUDE" s, not (is_ident (head s2)), Just s3 <- maybePrefixMatch "}-#" (reverse s2) = Just ["-#include", removeSpaces (reverse s3)] + + | Just s2 <- maybePrefixMatch "LANGUAGE" s, not (is_ident (head s2)), + Just s3 <- maybePrefixMatch "}-#" (reverse s2) + = case [ exts | (exts,"") <- reads ('[' : reverse (']':s3))] of + [] -> languagePragParseError i fn + exts:_ -> case extensionsToGHCFlag exts of + ([], opts) -> Just opts + (unsup,_) -> unsupportedExtnError i fn unsup | otherwise = Nothing - matchOptions2 s + matchOptions2 i fn s | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (words (reverse s3)) | otherwise = Nothing +languagePragParseError i fn = + pgmError (showSDoc (mkLocMessage loc ( + text "cannot parse LANGUAGE pragma"))) + where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0) + +unsupportedExtnError i fn unsup = + pgmError (showSDoc (mkLocMessage loc ( + text "unsupported extensions: " <> + hcat (punctuate comma (map (text.show) unsup))))) + where loc = srcLocSpan (mkSrcLoc (mkFastString fn) i 0) + + +optionsErrorMsgs :: [String] -> [(Int,String)] -> FilePath -> Messages +optionsErrorMsgs unhandled_flags flags_lines filename + = (emptyBag, listToBag (map mkMsg unhandled_flags_lines)) + where + unhandled_flags_lines = [ (l,f) | f <- unhandled_flags, + (l,f') <- flags_lines, f == f' ] + mkMsg (line,flag) = + ErrUtils.mkPlainErrMsg (srcLocSpan loc) $ + text "unknown flag in {-# OPTIONS #-} pragma:" <+> text flag + where + loc = mkSrcLoc (mkFastString filename) line 0 + -- ToDo: we need a better SrcSpan here + -- ----------------------------------------------------------------------------- -- Misc.