1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.98 2002/03/12 16:40:57 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 AsyncException(StackOverflow) )
63 import System ( getArgs, exitWith, ExitCode(..) )
68 #ifndef mingw32_TARGET_OS
69 import Concurrent ( myThreadId )
70 #if __GLASGOW_HASKELL__ < 500
71 import Exception ( raiseInThread )
72 #define throwTo raiseInThread
74 import Exception ( throwTo )
77 import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
78 import Dynamic ( toDyn )
81 -----------------------------------------------------------------------------
84 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
85 -- time commands when run with -v
89 -- Win32 support: proper signal handling
90 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
91 -- reading the package configuration file is too slow
94 -----------------------------------------------------------------------------
95 -- Differences vs. old driver:
97 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
98 -- consistency checking removed (may do this properly later)
101 -----------------------------------------------------------------------------
105 -- top-level exception handler: any unrecognised exception is a compiler bug.
106 handle (\exception -> do
109 -- an IO exception probably isn't our fault, so don't panic
110 IOException _ -> hPutStr stderr (show exception)
111 AsyncException StackOverflow ->
112 hPutStrLn stderr "stack overflow: use +RTS -K<size> \
114 _other -> hPutStr stderr (show (Panic (show exception)))
115 exitWith (ExitFailure 1)
118 -- all error messages are propagated as exceptions
119 handleDyn (\dyn -> do
122 PhaseFailed _ code -> exitWith code
123 Interrupted -> exitWith (ExitFailure 1)
124 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
125 exitWith (ExitFailure 1)
128 -- make sure we clean up after ourselves
129 later (do forget_it <- readIORef v_Keep_tmp_files
130 unless forget_it $ do
131 verb <- dynFlag verbosity
134 -- exceptions will be blocked while we clean the temporary files,
135 -- so there shouldn't be any difficulty if we receive further
138 -- install signal handlers
139 #ifndef mingw32_TARGET_OS
140 main_thread <- myThreadId
141 let sig_handler = Catch (throwTo main_thread
142 (DynException (toDyn Interrupted)))
143 installHandler sigQUIT sig_handler Nothing
144 installHandler sigINT sig_handler Nothing
148 let (minusB_args, argv') = partition (prefixMatch "-B") argv
149 top_dir <- initSysTools minusB_args
151 -- Read the package configuration
152 conf_file <- getPackageConfigPath
153 readPackageConf conf_file
155 -- process all the other arguments, and get the source files
156 non_static <- processArgs static_flags argv' []
157 mode <- readIORef v_GhcMode
158 stop_flag <- readIORef v_GhcModeFlag
160 -- -O and --interactive are not a good combination
161 -- ditto with any kind of way selection
162 orig_opt_level <- readIORef v_OptLevel
163 when (orig_opt_level > 0 && mode == DoInteractive) $
164 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
165 writeIORef v_OptLevel 0
166 orig_ways <- readIORef v_Ways
167 when (not (null orig_ways) && mode == DoInteractive) $
168 do throwDyn (UsageError
169 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
171 -- Find the build tag, and re-process the build-specific options.
172 -- Also add in flags for unregisterised compilation, if
173 -- GhcUnregisterised=YES.
174 way_opts <- findBuildTag
175 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
177 pkg_extra_opts <- getPackageExtraGhcOpts
178 extra_non_static <- processArgs static_flags
179 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
181 -- give the static flags to hsc
182 static_opts <- buildStaticHscOpts
183 writeIORef v_Static_hsc_opts static_opts
185 -- build the default DynFlags (these may be adjusted on a per
186 -- module basis by OPTIONS pragmas and settings in the interpreter).
188 core_todo <- buildCoreToDo
189 stg_todo <- buildStgToDo
191 -- set the "global" HscLang. The HscLang can be further adjusted on a module
192 -- by module basis, using only the -fvia-C and -fasm flags. If the global
193 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
194 dyn_flags <- getDynFlags
195 let lang = case mode of
196 DoInteractive -> HscInterpreted
197 _other -> defaultHscLang
199 setDynFlags (dyn_flags{ coreToDo = core_todo,
202 -- leave out hscOutName for now
203 hscOutName = panic "Main.main:hscOutName not set",
207 -- the rest of the arguments are "dynamic"
208 srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
210 -- save the "initial DynFlags" away
213 -- complain about any unknown flags
214 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
216 verb <- dynFlag verbosity
218 -- Show the GHCi banner
220 when (mode == DoInteractive && verb >= 1) $
221 hPutStrLn stdout ghciWelcomeMsg
224 -- Display details of the configuration in verbose mode
226 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
227 hPutStr stderr cProjectVersion
228 hPutStr stderr ", for Haskell 98, compiled by GHC version "
229 hPutStrLn stderr cBooterVersion)
232 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
234 pkg_details <- readIORef v_Package_details
235 showPackages pkg_details
238 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
240 -- initialise the finder
241 pkg_avails <- getPackageInfo
242 initFinder pkg_avails
244 -- mkdependHS is special
245 when (mode == DoMkDependHS) beginMkDependHS
247 -- -ohi sanity checking
248 ohi <- readIORef v_Output_hi
250 (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
251 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
254 -- make/interactive require invoking the compilation manager
255 if (mode == DoMake) then beginMake srcs else do
256 if (mode == DoInteractive) then beginInteractive srcs else do
258 -- -o sanity checking
259 o_file <- readIORef v_Output_file
260 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
261 then throwDyn (UsageError "can't apply -o to multiple source files")
264 if null srcs then throwDyn (UsageError "no input files") else do
266 let compileFile src = do
269 exists <- doesFileExist src
271 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
273 -- We compile in two stages, because the file may have an
274 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
275 let (basename, suffix) = splitFilename src
277 -- just preprocess (Haskell source only)
278 let src_and_suff = (src, getFileSuffix src)
279 let not_hs_file = not (haskellish_src_file src)
280 pp <- if not_hs_file || mode == StopBefore Hsc || mode == StopBefore HsPp
281 then return src_and_suff else do
282 phases <- genPipeline (StopBefore Hsc) stop_flag
283 False{-not persistent-} defaultHscLang
285 pipeLoop phases src_and_suff False{-no linking-} False{-no -o flag-}
288 -- rest of compilation
289 hsc_lang <- dynFlag hscLang
290 phases <- genPipeline mode stop_flag True hsc_lang pp
291 (r,_) <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL)
292 True{-use -o flag-} basename suffix
295 o_files <- mapM compileFile srcs
297 when (mode == DoMkDependHS) endMkDependHS
298 when (mode == DoLink) (doLink o_files)
299 when (mode == DoMkDLL) (doMkDLL o_files)
303 beginMake :: [String] -> IO ()
304 beginMake fileish_args
305 = do let (objs, mods) = partition objish_file fileish_args
306 mapM (add v_Ld_inputs) objs
309 [] -> throwDyn (UsageError "no input files")
310 _ -> do dflags <- getDynFlags
311 state <- cmInit Batch
312 graph <- cmDepAnal state dflags mods
313 (_, ok, _) <- cmLoadModules state dflags graph
314 when (not ok) (exitWith (ExitFailure 1))
318 beginInteractive :: [String] -> IO ()
320 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
322 beginInteractive fileish_args
323 = do minus_ls <- readIORef v_Cmdline_libraries
325 let (objs, mods) = partition objish_file fileish_args
326 libs = map Left objs ++ map Right minus_ls
328 state <- cmInit Interactive
329 interactiveUI state mods libs