1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.100 2002/03/13 13:51:35 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,
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,
56 import Panic ( GhcException(..), panic )
58 -- Standard Haskell libraries
60 import Directory ( doesFileExist )
61 import IOExts ( readIORef, writeIORef )
62 import Exception ( throwDyn, Exception(..),
63 AsyncException(StackOverflow) )
64 import System ( getArgs, exitWith, ExitCode(..) )
69 #ifndef mingw32_TARGET_OS
70 import Concurrent ( myThreadId )
71 #if __GLASGOW_HASKELL__ < 500
72 import Exception ( raiseInThread )
73 #define throwTo raiseInThread
75 import Exception ( throwTo )
78 import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
79 import Dynamic ( toDyn )
82 -----------------------------------------------------------------------------
85 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
86 -- time commands when run with -v
90 -- Win32 support: proper signal handling
91 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
92 -- reading the package configuration file is too slow
95 -----------------------------------------------------------------------------
96 -- Differences vs. old driver:
98 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
99 -- consistency checking removed (may do this properly later)
102 -----------------------------------------------------------------------------
106 -- top-level exception handler: any unrecognised exception is a compiler bug.
107 handle (\exception -> do
110 -- an IO exception probably isn't our fault, so don't panic
111 IOException _ -> hPutStr stderr (show exception)
112 AsyncException StackOverflow ->
113 hPutStrLn stderr "stack overflow: use +RTS -K<size> \
115 _other -> hPutStr stderr (show (Panic (show exception)))
116 exitWith (ExitFailure 1)
119 -- all error messages are propagated as exceptions
120 handleDyn (\dyn -> do
123 PhaseFailed _ code -> exitWith code
124 Interrupted -> exitWith (ExitFailure 1)
125 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
126 exitWith (ExitFailure 1)
129 -- make sure we clean up after ourselves
130 later (do forget_it <- readIORef v_Keep_tmp_files
131 unless forget_it $ do
132 verb <- dynFlag verbosity
135 -- exceptions will be blocked while we clean the temporary files,
136 -- so there shouldn't be any difficulty if we receive further
139 -- install signal handlers
140 #ifndef mingw32_TARGET_OS
141 main_thread <- myThreadId
142 let sig_handler = Catch (throwTo main_thread
143 (DynException (toDyn Interrupted)))
144 installHandler sigQUIT sig_handler Nothing
145 installHandler sigINT sig_handler Nothing
149 let (minusB_args, argv') = partition (prefixMatch "-B") argv
150 top_dir <- initSysTools minusB_args
152 -- Read the package configuration
153 conf_file <- getPackageConfigPath
154 readPackageConf conf_file
156 -- process all the other arguments, and get the source files
157 non_static <- processArgs static_flags argv' []
158 mode <- readIORef v_GhcMode
159 stop_flag <- readIORef v_GhcModeFlag
161 -- -O and --interactive are not a good combination
162 -- ditto with any kind of way selection
163 orig_opt_level <- readIORef v_OptLevel
164 when (orig_opt_level > 0 && mode == DoInteractive) $
165 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
166 writeIORef v_OptLevel 0
167 orig_ways <- readIORef v_Ways
168 when (not (null orig_ways) && mode == DoInteractive) $
169 do throwDyn (UsageError
170 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
172 -- Find the build tag, and re-process the build-specific options.
173 -- Also add in flags for unregisterised compilation, if
174 -- GhcUnregisterised=YES.
175 way_opts <- findBuildTag
176 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
178 pkg_extra_opts <- getPackageExtraGhcOpts
179 extra_non_static <- processArgs static_flags
180 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
182 -- give the static flags to hsc
183 static_opts <- buildStaticHscOpts
184 writeIORef v_Static_hsc_opts static_opts
186 -- build the default DynFlags (these may be adjusted on a per
187 -- module basis by OPTIONS pragmas and settings in the interpreter).
189 core_todo <- buildCoreToDo
190 stg_todo <- buildStgToDo
192 -- set the "global" HscLang. The HscLang can be further adjusted on a module
193 -- by module basis, using only the -fvia-C and -fasm flags. If the global
194 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
195 dyn_flags <- getDynFlags
196 let lang = case mode of
197 DoInteractive -> HscInterpreted
198 _other -> hscLang dyn_flags
200 setDynFlags (dyn_flags{ coreToDo = core_todo,
203 -- leave out hscOutName for now
204 hscOutName = panic "Main.main:hscOutName not set",
208 -- the rest of the arguments are "dynamic"
209 srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
211 -- save the "initial DynFlags" away
214 -- complain about any unknown flags
215 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
217 verb <- dynFlag verbosity
219 -- Show the GHCi banner
221 when (mode == DoInteractive && verb >= 1) $
222 hPutStrLn stdout ghciWelcomeMsg
225 -- Display details of the configuration in verbose mode
227 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
228 hPutStr stderr cProjectVersion
229 hPutStr stderr ", for Haskell 98, compiled by GHC version "
230 hPutStrLn stderr cBooterVersion)
233 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
235 pkg_details <- readIORef v_Package_details
236 showPackages pkg_details
239 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
241 -- initialise the finder
242 pkg_avails <- getPackageInfo
243 initFinder pkg_avails
245 -- mkdependHS is special
246 when (mode == DoMkDependHS) beginMkDependHS
248 -- -ohi sanity checking
249 ohi <- readIORef v_Output_hi
251 (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
252 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
255 -- make/interactive require invoking the compilation manager
256 if (mode == DoMake) then beginMake srcs else do
257 if (mode == DoInteractive) then beginInteractive srcs else do
259 -- -o sanity checking
260 o_file <- readIORef v_Output_file
261 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
262 then throwDyn (UsageError "can't apply -o to multiple source files")
265 if null srcs then throwDyn (UsageError "no input files") else do
267 let compileFile src = do
270 exists <- doesFileExist src
272 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
274 -- We compile in two stages, because the file may have an
275 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
276 let (basename, suffix) = splitFilename src
278 -- just preprocess (Haskell source only)
279 let src_and_suff = (src, getFileSuffix src)
280 let not_hs_file = not (haskellish_src_file src)
281 pp <- if not_hs_file || mode == StopBefore Hsc || mode == StopBefore HsPp
282 then return src_and_suff else do
283 phases <- genPipeline (StopBefore Hsc) stop_flag
284 False{-not persistent-} defaultHscLang
286 pipeLoop phases src_and_suff False{-no linking-} False{-no -o flag-}
289 -- rest of compilation
290 hsc_lang <- dynFlag hscLang
291 phases <- genPipeline mode stop_flag True hsc_lang pp
292 (r,_) <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL)
293 True{-use -o flag-} basename suffix
296 o_files <- mapM compileFile srcs
298 when (mode == DoMkDependHS) endMkDependHS
299 when (mode == DoLink) (doLink o_files)
300 when (mode == DoMkDLL) (doMkDLL o_files)
304 beginMake :: [String] -> IO ()
305 beginMake fileish_args
306 = do let (objs, mods) = partition objish_file fileish_args
307 mapM (add v_Ld_inputs) objs
310 [] -> throwDyn (UsageError "no input files")
311 _ -> do dflags <- getDynFlags
312 state <- cmInit Batch
313 graph <- cmDepAnal state dflags mods
314 (_, ok, _) <- cmLoadModules state dflags graph
315 when (not ok) (exitWith (ExitFailure 1))
319 beginInteractive :: [String] -> IO ()
321 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
323 beginInteractive fileish_args
324 = do minus_ls <- readIORef v_Cmdline_libraries
326 let (objs, mods) = partition objish_file fileish_args
327 libs = map Left objs ++ map Right minus_ls
329 state <- cmInit Interactive
330 interactiveUI state mods libs