1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.96 2002/03/04 17:01:30 simonmar Exp $
8 -- (c) The University of Glasgow 2002
10 -----------------------------------------------------------------------------
12 -- with path so that ghc -M can find config.h
13 #include "../includes/config.h"
15 module Main (main) where
17 #include "HsVersions.h"
21 import InteractiveUI(ghciWelcomeMsg, interactiveUI)
25 import Finder ( initFinder )
26 import CompManager ( cmInit, cmLoadModules, cmDepAnal )
27 import HscTypes ( GhciMode(..) )
28 import Config ( cBooterVersion, cGhcUnregisterised, cProjectVersion )
29 import SysTools ( getPackageConfigPath, initSysTools, cleanTempFiles )
30 import Packages ( showPackages )
32 import DriverPipeline ( doLink, doMkDLL, genPipeline, pipeLoop )
33 import DriverState ( buildCoreToDo, buildStgToDo, defaultHscLang,
34 findBuildTag, getPackageInfo, unregFlags,
35 v_GhcMode, v_GhcModeFlag, GhcMode(..),
36 v_Cmdline_libraries, v_Keep_tmp_files, v_Ld_inputs,
37 v_OptLevel, v_Output_file, v_Output_hi,
38 v_Package_details, v_Ways, getPackageExtraGhcOpts,
41 import DriverFlags ( buildStaticHscOpts,
42 dynamic_flags, processArgs, static_flags)
44 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
45 import DriverPhases ( Phase(HsPp, Hsc), haskellish_src_file, objish_file )
47 import DriverUtil ( add, handle, handleDyn, later, splitFilename,
48 unknownFlagErr, getFileSuffix )
49 import CmdLineOpts ( dynFlag, restoreDynFlags,
50 saveDynFlags, setDynFlags, getDynFlags, dynFlag,
51 DynFlags(..), HscLang(..), v_Static_hsc_opts
55 import Panic ( GhcException(..), panic )
57 -- Standard Haskell libraries
59 import Directory ( doesFileExist )
60 import IOExts ( readIORef, writeIORef )
61 import Exception ( throwDyn, Exception(..) )
62 import System ( getArgs, exitWith, ExitCode(..) )
67 #ifndef mingw32_TARGET_OS
68 import Concurrent ( myThreadId )
69 #if __GLASGOW_HASKELL__ < 500
70 import Exception ( raiseInThread )
71 #define throwTo raiseInThread
73 import Exception ( throwTo )
76 import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
77 import Dynamic ( toDyn )
80 -----------------------------------------------------------------------------
83 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
84 -- time commands when run with -v
88 -- Win32 support: proper signal handling
89 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
90 -- reading the package configuration file is too slow
93 -----------------------------------------------------------------------------
94 -- Differences vs. old driver:
96 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
97 -- consistency checking removed (may do this properly later)
100 -----------------------------------------------------------------------------
104 -- top-level exception handler: any unrecognised exception is a compiler bug.
105 handle (\exception -> do
108 -- an IO exception probably isn't our fault, so don't panic
109 IOException _ -> hPutStr stderr (show exception)
110 AsyncException StackOverflow ->
111 hPutStrLn stderr "stack overflow: use +RTS -K<size> \
113 _other -> hPutStr stderr (show (Panic (show exception)))
114 exitWith (ExitFailure 1)
117 -- all error messages are propagated as exceptions
118 handleDyn (\dyn -> do
121 PhaseFailed _ code -> exitWith code
122 Interrupted -> exitWith (ExitFailure 1)
123 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
124 exitWith (ExitFailure 1)
127 -- make sure we clean up after ourselves
128 later (do forget_it <- readIORef v_Keep_tmp_files
129 unless forget_it $ do
130 verb <- dynFlag verbosity
133 -- exceptions will be blocked while we clean the temporary files,
134 -- so there shouldn't be any difficulty if we receive further
137 -- install signal handlers
138 #ifndef mingw32_TARGET_OS
139 main_thread <- myThreadId
140 let sig_handler = Catch (throwTo main_thread
141 (DynException (toDyn Interrupted)))
142 installHandler sigQUIT sig_handler Nothing
143 installHandler sigINT sig_handler Nothing
147 let (minusB_args, argv') = partition (prefixMatch "-B") argv
148 top_dir <- initSysTools minusB_args
150 -- Read the package configuration
151 conf_file <- getPackageConfigPath
152 readPackageConf conf_file
154 -- process all the other arguments, and get the source files
155 non_static <- processArgs static_flags argv' []
156 mode <- readIORef v_GhcMode
157 stop_flag <- readIORef v_GhcModeFlag
159 -- -O and --interactive are not a good combination
160 -- ditto with any kind of way selection
161 orig_opt_level <- readIORef v_OptLevel
162 when (orig_opt_level > 0 && mode == DoInteractive) $
163 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
164 writeIORef v_OptLevel 0
165 orig_ways <- readIORef v_Ways
166 when (not (null orig_ways) && mode == DoInteractive) $
167 do throwDyn (UsageError
168 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
170 -- Find the build tag, and re-process the build-specific options.
171 -- Also add in flags for unregisterised compilation, if
172 -- GhcUnregisterised=YES.
173 way_opts <- findBuildTag
174 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
176 pkg_extra_opts <- getPackageExtraGhcOpts
177 extra_non_static <- processArgs static_flags
178 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
180 -- give the static flags to hsc
181 static_opts <- buildStaticHscOpts
182 writeIORef v_Static_hsc_opts static_opts
184 -- build the default DynFlags (these may be adjusted on a per
185 -- module basis by OPTIONS pragmas and settings in the interpreter).
187 core_todo <- buildCoreToDo
188 stg_todo <- buildStgToDo
190 -- set the "global" HscLang. The HscLang can be further adjusted on a module
191 -- by module basis, using only the -fvia-C and -fasm flags. If the global
192 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
193 dyn_flags <- getDynFlags
194 let lang = case mode of
195 DoInteractive -> HscInterpreted
196 _other -> hscLang dyn_flags
198 setDynFlags (dyn_flags{ coreToDo = core_todo,
201 -- leave out hscOutName for now
202 hscOutName = panic "Main.main:hscOutName not set",
206 -- the rest of the arguments are "dynamic"
207 srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
209 -- save the "initial DynFlags" away
212 -- complain about any unknown flags
213 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
215 verb <- dynFlag verbosity
217 -- Show the GHCi banner
219 when (mode == DoInteractive && verb >= 1) $
220 hPutStrLn stdout ghciWelcomeMsg
223 -- Display details of the configuration in verbose mode
225 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
226 hPutStr stderr cProjectVersion
227 hPutStr stderr ", for Haskell 98, compiled by GHC version "
228 hPutStrLn stderr cBooterVersion)
231 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
233 pkg_details <- readIORef v_Package_details
234 showPackages pkg_details
237 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
239 -- initialise the finder
240 pkg_avails <- getPackageInfo
241 initFinder pkg_avails
243 -- mkdependHS is special
244 when (mode == DoMkDependHS) beginMkDependHS
246 -- -ohi sanity checking
247 ohi <- readIORef v_Output_hi
249 (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
250 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
253 -- make/interactive require invoking the compilation manager
254 if (mode == DoMake) then beginMake srcs else do
255 if (mode == DoInteractive) then beginInteractive srcs else do
257 -- -o sanity checking
258 o_file <- readIORef v_Output_file
259 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
260 then throwDyn (UsageError "can't apply -o to multiple source files")
263 if null srcs then throwDyn (UsageError "no input files") else do
265 let compileFile src = do
268 exists <- doesFileExist src
270 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
272 -- We compile in two stages, because the file may have an
273 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
274 let (basename, suffix) = splitFilename src
276 -- just preprocess (Haskell source only)
277 let src_and_suff = (src, getFileSuffix src)
278 let not_hs_file = not (haskellish_src_file src)
279 pp <- if not_hs_file || mode == StopBefore Hsc || mode == StopBefore HsPp
280 then return src_and_suff else do
281 phases <- genPipeline (StopBefore Hsc) stop_flag
282 False{-not persistent-} defaultHscLang
284 pipeLoop phases src_and_suff False{-no linking-} False{-no -o flag-}
287 -- rest of compilation
288 hsc_lang <- dynFlag hscLang
289 phases <- genPipeline mode stop_flag True hsc_lang pp
290 (r,_) <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL)
291 True{-use -o flag-} basename suffix
294 o_files <- mapM compileFile srcs
296 when (mode == DoMkDependHS) endMkDependHS
297 when (mode == DoLink) (doLink o_files)
298 when (mode == DoMkDLL) (doMkDLL o_files)
302 beginMake :: [String] -> IO ()
303 beginMake fileish_args
304 = do let (objs, mods) = partition objish_file fileish_args
305 mapM (add v_Ld_inputs) objs
308 [] -> throwDyn (UsageError "no input files")
309 _ -> do dflags <- getDynFlags
310 state <- cmInit Batch
311 graph <- cmDepAnal state dflags mods
312 (_, ok, _) <- cmLoadModules state dflags graph
313 when (not ok) (exitWith (ExitFailure 1))
317 beginInteractive :: [String] -> IO ()
319 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
321 beginInteractive fileish_args
322 = do minus_ls <- readIORef v_Cmdline_libraries
324 let (objs, mods) = partition objish_file fileish_args
325 libs = map Left objs ++ map Right minus_ls
327 state <- cmInit Interactive
328 interactiveUI state mods libs