{-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
-----------------------------------------------------------------------------
--- $Id: Main.hs,v 1.110 2002/09/06 14:35:44 simonmar Exp $
+-- $Id: Main.hs,v 1.141 2004/11/26 16:21:00 simonmar Exp $
--
-- GHC Driver program
--
-----------------------------------------------------------------------------
-- with path so that ghc -M can find config.h
-#include "../includes/config.h"
+#include "../includes/ghcconfig.h"
module Main (main) where
#ifdef GHCI
-import InteractiveUI
+import InteractiveUI( ghciWelcomeMsg, interactiveUI )
#endif
-import Finder ( initFinder )
import CompManager ( cmInit, cmLoadModules, cmDepAnal )
import HscTypes ( GhciMode(..) )
import Config ( cBooterVersion, cGhcUnregisterised, cProjectVersion )
-import SysTools ( getPackageConfigPath, initSysTools, cleanTempFiles )
-import Packages ( showPackages )
-
-import DriverPipeline ( doLink, doMkDLL, genPipeline, pipeLoop )
-import DriverState ( buildCoreToDo, buildStgToDo,
- findBuildTag, getPackageInfo, unregFlags,
+import SysTools ( initSysTools, cleanTempFiles, normalisePath )
+import Packages ( dumpPackages, initPackages, haskell98PackageId )
+import DriverPipeline ( staticLink, doMkDLL, runPipeline )
+import DriverState ( buildStgToDo,
+ findBuildTag, unregFlags,
v_GhcMode, v_GhcModeFlag, GhcMode(..),
- v_Cmdline_libraries, v_Keep_tmp_files, v_Ld_inputs,
- v_OptLevel, v_Output_file, v_Output_hi,
- v_Package_details, v_Ways, getPackageExtraGhcOpts,
- readPackageConf, verifyOutputFiles
+ v_Keep_tmp_files, v_Ld_inputs, v_Ways,
+ v_Output_file, v_Output_hi,
+ verifyOutputFiles, v_NoLink
)
-import DriverFlags ( buildStaticHscOpts,
- dynamic_flags, processArgs, static_flags)
+import DriverFlags
import DriverMkDepend ( beginMkDependHS, endMkDependHS )
-import DriverPhases ( Phase(HsPp, Hsc), haskellish_src_file, objish_file,
- isSourceFile )
-
-import DriverUtil ( add, handle, handleDyn, later, splitFilename,
- unknownFlagsErr, getFileSuffix )
-import CmdLineOpts ( dynFlag, restoreDynFlags,
- saveDynFlags, setDynFlags, getDynFlags, dynFlag,
- DynFlags(..), HscLang(..), v_Static_hsc_opts,
- defaultHscLang
- )
+import DriverPhases ( isSourceFilename )
+
+import DriverUtil ( add, handle, handleDyn, later, unknownFlagsErr )
+import CmdLineOpts ( DynFlags(..), HscLang(..), v_Static_hsc_opts,
+ defaultDynFlags )
+import BasicTypes ( failed )
import Outputable
import Util
-import Panic ( GhcException(..), panic )
+import Panic ( GhcException(..), panic, installSignalHandlers )
import DATA_IOREF ( readIORef, writeIORef )
import EXCEPTION ( throwDyn, Exception(..),
AsyncException(StackOverflow) )
-#ifndef mingw32_HOST_OS
-import CONCURRENT ( myThreadId )
-# if __GLASGOW_HASKELL__ < 500
-import EXCEPTION ( raiseInThread )
-#define throwTo raiseInThread
-# else
-import EXCEPTION ( throwTo )
-# endif
-
-#if __GLASGOW_HASKELL__ > 504
-import System.Posix.Signals
-#else
-import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
-#endif
-
-import DYNAMIC ( toDyn )
-#endif
-
-- Standard Haskell libraries
import IO
import Directory ( doesFileExist )
hFlush stdout
case exception of
-- an IO exception probably isn't our fault, so don't panic
- IOException _ -> hPutStr stderr (show exception)
+ IOException _ -> hPutStrLn stderr (show exception)
AsyncException StackOverflow ->
- hPutStrLn stderr "stack overflow: use +RTS -K<size> \
- \to increase it"
+ hPutStrLn stderr "stack overflow: use +RTS -K<size> to increase it"
_other -> hPutStr stderr (show (Panic (show exception)))
exitWith (ExitFailure 1)
) $ do
exitWith (ExitFailure 1)
) $ do
- -- make sure we clean up after ourselves
- later (do forget_it <- readIORef v_Keep_tmp_files
- unless forget_it $ do
- verb <- dynFlag verbosity
- cleanTempFiles verb
- ) $ do
- -- exceptions will be blocked while we clean the temporary files,
- -- so there shouldn't be any difficulty if we receive further
- -- signals.
-
- -- install signal handlers
-#ifndef mingw32_HOST_OS
- main_thread <- myThreadId
- let sig_handler = Catch (throwTo main_thread
- (DynException (toDyn Interrupted)))
- installHandler sigQUIT sig_handler Nothing
- installHandler sigINT sig_handler Nothing
-#endif
+ installSignalHandlers
argv <- getArgs
let (minusB_args, argv') = partition (prefixMatch "-B") argv
top_dir <- initSysTools minusB_args
- -- Read the package configuration
- conf_file <- getPackageConfigPath
- readPackageConf conf_file
-
- -- process all the other arguments, and get the source files
- non_static <- processArgs static_flags argv' []
+ -- Process all the other arguments, and get the source files
+ non_static <- processStaticFlags argv'
mode <- readIORef v_GhcMode
- stop_flag <- readIORef v_GhcModeFlag
-- -O and --interactive are not a good combination
-- ditto with any kind of way selection
- orig_opt_level <- readIORef v_OptLevel
- when (orig_opt_level > 0 && mode == DoInteractive) $
- do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
- writeIORef v_OptLevel 0
orig_ways <- readIORef v_Ways
- when (notNull orig_ways && mode == DoInteractive) $
+ when (notNull orig_ways && isInteractive mode) $
do throwDyn (UsageError
"--interactive can't be used with -prof, -ticky, -unreg or -smp.")
way_opts <- findBuildTag
let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
| otherwise = []
- pkg_extra_opts <- getPackageExtraGhcOpts
- extra_non_static <- processArgs static_flags
- (unreg_opts ++ way_opts ++ pkg_extra_opts) []
+ extra_non_static <- processStaticFlags (unreg_opts ++ way_opts)
- -- give the static flags to hsc
+ -- Give the static flags to hsc
static_opts <- buildStaticHscOpts
writeIORef v_Static_hsc_opts static_opts
-- build the default DynFlags (these may be adjusted on a per
-- module basis by OPTIONS pragmas and settings in the interpreter).
- core_todo <- buildCoreToDo
stg_todo <- buildStgToDo
-- set the "global" HscLang. The HscLang can be further adjusted on a module
-- by module basis, using only the -fvia-C and -fasm flags. If the global
-- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
- dyn_flags <- getDynFlags
+ let dflags0 = defaultDynFlags
let lang = case mode of
DoInteractive -> HscInterpreted
- _other -> hscLang dyn_flags
-
- setDynFlags (dyn_flags{ coreToDo = core_todo,
- stgToDo = stg_todo,
- hscLang = lang,
- -- leave out hscOutName for now
- hscOutName = panic "Main.main:hscOutName not set",
- verbosity = 1
- })
-
- -- the rest of the arguments are "dynamic"
- srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
-
- -- save the "initial DynFlags" away
- saveDynFlags
-
- -- perform some checks of the options set / report unknowns.
- checkOptions srcs
-
- verb <- dynFlag verbosity
-
- -- Show the GHCi banner
-# ifdef GHCI
- when (mode == DoInteractive && verb >= 1) $
- hPutStrLn stdout ghciWelcomeMsg
-# endif
-
- -- Display details of the configuration in verbose mode
- when (verb >= 2)
- (do hPutStr stderr "Glasgow Haskell Compiler, Version "
- hPutStr stderr cProjectVersion
- hPutStr stderr ", for Haskell 98, compiled by GHC version "
- hPutStrLn stderr cBooterVersion)
-
- when (verb >= 2)
- (hPutStrLn stderr ("Using package config file: " ++ conf_file))
+ DoEval _ -> HscInterpreted
+ _other -> hscLang dflags0
+
+ let dflags1 = dflags0{ stgToDo = stg_todo,
+ hscLang = lang,
+ -- leave out hscOutName for now
+ hscOutName = panic "Main.main:hscOutName not set",
+ verbosity = case mode of
+ DoEval _ -> 0
+ _other -> 1
+ }
+
+ -- The rest of the arguments are "dynamic"
+ -- Leftover ones are presumably files
+ (dflags2, fileish_args) <- processDynamicFlags
+ (extra_non_static ++ non_static) dflags1
+
+ -- make sure we clean up after ourselves
+ later (do forget_it <- readIORef v_Keep_tmp_files
+ unless forget_it $ do
+ cleanTempFiles dflags2
+ ) $ do
+ -- exceptions will be blocked while we clean the temporary files,
+ -- so there shouldn't be any difficulty if we receive further
+ -- signals.
- pkg_details <- readIORef v_Package_details
- showPackages pkg_details
+ -- Read the package config(s), and process the package-related
+ -- command-line flags
+ dflags <- initPackages dflags2
+
+ let
+ {-
+ We split out the object files (.o, .dll) and add them
+ to v_Ld_inputs for use by the linker.
+
+ The following things should be considered compilation manager inputs:
+
+ - haskell source files (strings ending in .hs, .lhs or other
+ haskellish extension),
+
+ - module names (not forgetting hierarchical module names),
+
+ - and finally we consider everything not containing a '.' to be
+ a comp manager input, as shorthand for a .hs or .lhs filename.
+
+ Everything else is considered to be a linker object, and passed
+ straight through to the linker.
+ -}
+ looks_like_an_input m = isSourceFilename m
+ || looksLikeModuleName m
+ || '.' `notElem` m
+
+ -- To simplify the handling of filepaths, we normalise all filepaths right
+ -- away - e.g., for win32 platforms, backslashes are converted
+ -- into forward slashes.
+ normal_fileish_paths = map normalisePath fileish_args
+ (srcs, objs) = partition looks_like_an_input normal_fileish_paths
+
+ -- Note: have v_Ld_inputs maintain the order in which 'objs' occurred on
+ -- the command-line.
+ mapM_ (add v_Ld_inputs) (reverse objs)
+
+ ---------------- Display banners and configuration -----------
+ showBanners mode dflags static_opts
+
+ ---------------- Final sanity checking -----------
+ checkOptions mode srcs objs
+
+ ---------------- Do the business -----------
+
+ -- Always link in the haskell98 package for static linking. Other
+ -- packages have to be specified via the -package flag.
+ let link_pkgs
+ | Just h98_id <- haskell98PackageId (pkgState dflags) = [h98_id]
+ | otherwise = []
+
+ case mode of
+ DoMake -> doMake dflags srcs
+
+ DoMkDependHS -> do { beginMkDependHS ;
+ compileFiles mode dflags srcs;
+ endMkDependHS dflags }
+ StopBefore p -> do { compileFiles mode dflags srcs; return () }
+ DoMkDLL -> do { o_files <- compileFiles mode dflags srcs;
+ doMkDLL dflags o_files link_pkgs }
+ DoLink -> do { o_files <- compileFiles mode dflags srcs;
+ omit_linking <- readIORef v_NoLink;
+ when (not omit_linking)
+ (staticLink dflags o_files link_pkgs) }
- when (verb >= 3)
- (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
+#ifndef GHCI
+ DoInteractive -> noInteractiveError
+ DoEval _ -> noInteractiveError
+ where
+ noInteractiveError = throwDyn (CmdLineError "not built for interactive use")
+#else
+ DoInteractive -> interactiveUI dflags srcs Nothing
+ DoEval expr -> interactiveUI dflags srcs (Just expr)
+#endif
- -- initialise the finder
- pkg_avails <- getPackageInfo
- initFinder pkg_avails
+-- -----------------------------------------------------------------------------
+-- Option sanity checks
- -- mkdependHS is special
- when (mode == DoMkDependHS) beginMkDependHS
+checkOptions :: GhcMode -> [String] -> [String] -> IO ()
+ -- Final sanity checking before kicking off a compilation (pipeline).
+checkOptions mode srcs objs = do
+ -- Complain about any unknown flags
+ let unknown_opts = [ f | f@('-':_) <- srcs ]
+ when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
- -- -ohi sanity checking
- ohi <- readIORef v_Output_hi
+ -- -ohi sanity check
+ ohi <- readIORef v_Output_hi
if (isJust ohi &&
- (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
+ (mode == DoMake || isInteractive mode || srcs `lengthExceeds` 1))
then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
else do
- -- make/interactive require invoking the compilation manager
- if (mode == DoMake) then beginMake srcs else do
- if (mode == DoInteractive) then beginInteractive srcs else do
-
-- -o sanity checking
- let real_srcs = filter isSourceFile srcs -- filters out .a and .o that might appear
o_file <- readIORef v_Output_file
- if (real_srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
+ if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
then throwDyn (UsageError "can't apply -o to multiple source files")
else do
- if null srcs then throwDyn (UsageError "no input files") else do
-
- let compileFile src = do
- restoreDynFlags
+ -- Check that there are some input files (except in the interactive
+ -- case)
+ if null srcs && null objs && not (isInteractive mode)
+ then throwDyn (UsageError "no input files")
+ else do
- exists <- doesFileExist src
- when (not exists) $
- throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
+ -- Verify that output files point somewhere sensible.
+ verifyOutputFiles
- -- We compile in two stages, because the file may have an
- -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
- let (basename, suffix) = splitFilename src
+isInteractive DoInteractive = True
+isInteractive (DoEval _) = True
+isInteractive _ = False
- -- just preprocess (Haskell source only)
- let src_and_suff = (src, getFileSuffix src)
- let not_hs_file = not (haskellish_src_file src)
- pp <- if not_hs_file || mode == StopBefore Hsc || mode == StopBefore HsPp
- then return src_and_suff else do
- phases <- genPipeline (StopBefore Hsc) stop_flag
- False{-not persistent-} defaultHscLang
- src_and_suff
- pipeLoop phases src_and_suff False{-no linking-} False{-no -o flag-}
- basename suffix
+-- -----------------------------------------------------------------------------
+-- Compile files in one-shot mode.
- -- rest of compilation
- hsc_lang <- dynFlag hscLang
- phases <- genPipeline mode stop_flag True hsc_lang pp
- (r,_) <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL)
- True{-use -o flag-} basename suffix
- return r
+compileFiles :: GhcMode
+ -> DynFlags
+ -> [String] -- Source files
+ -> IO [String] -- Object files
+compileFiles mode dflags srcs = do
+ stop_flag <- readIORef v_GhcModeFlag
+ mapM (compileFile mode dflags stop_flag) srcs
- o_files <- mapM compileFile srcs
- when (mode == DoMkDependHS) endMkDependHS
- when (mode == DoLink) (doLink o_files)
- when (mode == DoMkDLL) (doMkDLL o_files)
+compileFile mode dflags stop_flag src = do
+ exists <- doesFileExist src
+ when (not exists) $
+ throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
+
+ o_file <- readIORef v_Output_file
+ -- when linking, the -o argument refers to the linker's output.
+ -- otherwise, we use it as the name for the pipeline's output.
+ let maybe_o_file
+ | mode==DoLink || mode==DoMkDLL = Nothing
+ | otherwise = o_file
+ runPipeline mode dflags stop_flag True maybe_o_file src
+ Nothing{-no ModLocation-}
-beginMake :: [String] -> IO ()
-beginMake fileish_args
- = do let (objs, mods) = partition objish_file fileish_args
- mapM_ (add v_Ld_inputs) objs
+-- ----------------------------------------------------------------------------
+-- Run --make mode
- case mods of
- [] -> throwDyn (UsageError "no input files")
- _ -> do dflags <- getDynFlags
- state <- cmInit Batch
- graph <- cmDepAnal state dflags mods
- (_, ok, _) <- cmLoadModules state dflags graph
- when (not ok) (exitWith (ExitFailure 1))
- return ()
+doMake :: DynFlags -> [String] -> IO ()
+doMake dflags [] = throwDyn (UsageError "no input files")
+doMake dflags srcs = do
+ state <- cmInit Batch dflags
+ graph <- cmDepAnal state srcs
+ (_, ok_flag, _) <- cmLoadModules state graph
+ when (failed ok_flag) (exitWith (ExitFailure 1))
+ return ()
+-- ---------------------------------------------------------------------------
+-- Various banners and verbosity output.
-beginInteractive :: [String] -> IO ()
-#ifndef GHCI
-beginInteractive = throwDyn (CmdLineError "not built for interactive use")
-#else
-beginInteractive fileish_args
- = do minus_ls <- readIORef v_Cmdline_libraries
+showBanners :: GhcMode -> DynFlags -> [String] -> IO ()
+showBanners mode dflags static_opts = do
+ let verb = verbosity dflags
- let (objs, mods) = partition objish_file fileish_args
- libs = map Object objs ++ map DLL minus_ls
+ -- Show the GHCi banner
+# ifdef GHCI
+ when (mode == DoInteractive && verb >= 1) $
+ hPutStrLn stdout ghciWelcomeMsg
+# endif
- state <- cmInit Interactive
- interactiveUI state mods libs
-#endif
+ -- Display details of the configuration in verbose mode
+ when (verb >= 2) $
+ do hPutStr stderr "Glasgow Haskell Compiler, Version "
+ hPutStr stderr cProjectVersion
+ hPutStr stderr ", for Haskell 98, compiled by GHC version "
+ hPutStrLn stderr cBooterVersion
-checkOptions :: [String] -> IO ()
-checkOptions srcs = do
- -- complain about any unknown flags
- let unknown_opts = [ f | f@('-':_) <- srcs ]
- when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
- -- verify that output files point somewhere sensible.
- verifyOutputFiles
- -- and anything else that it might be worth checking for
- -- before kicking of a compilation (pipeline).
+ when (verb >= 3) $
+ dumpPackages dflags
+ when (verb >= 3) $
+ hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts)
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