1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.97 2002/03/05 11:22:44 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 _other -> hPutStr stderr (show (Panic (show exception)))
112 exitWith (ExitFailure 1)
115 -- all error messages are propagated as exceptions
116 handleDyn (\dyn -> do
119 PhaseFailed _ code -> exitWith code
120 Interrupted -> exitWith (ExitFailure 1)
121 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
122 exitWith (ExitFailure 1)
125 -- make sure we clean up after ourselves
126 later (do forget_it <- readIORef v_Keep_tmp_files
127 unless forget_it $ do
128 verb <- dynFlag verbosity
131 -- exceptions will be blocked while we clean the temporary files,
132 -- so there shouldn't be any difficulty if we receive further
135 -- install signal handlers
136 #ifndef mingw32_TARGET_OS
137 main_thread <- myThreadId
138 let sig_handler = Catch (throwTo main_thread
139 (DynException (toDyn Interrupted)))
140 installHandler sigQUIT sig_handler Nothing
141 installHandler sigINT sig_handler Nothing
145 let (minusB_args, argv') = partition (prefixMatch "-B") argv
146 top_dir <- initSysTools minusB_args
148 -- Read the package configuration
149 conf_file <- getPackageConfigPath
150 readPackageConf conf_file
152 -- process all the other arguments, and get the source files
153 non_static <- processArgs static_flags argv' []
154 mode <- readIORef v_GhcMode
155 stop_flag <- readIORef v_GhcModeFlag
157 -- -O and --interactive are not a good combination
158 -- ditto with any kind of way selection
159 orig_opt_level <- readIORef v_OptLevel
160 when (orig_opt_level > 0 && mode == DoInteractive) $
161 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
162 writeIORef v_OptLevel 0
163 orig_ways <- readIORef v_Ways
164 when (not (null orig_ways) && mode == DoInteractive) $
165 do throwDyn (UsageError
166 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
168 -- Find the build tag, and re-process the build-specific options.
169 -- Also add in flags for unregisterised compilation, if
170 -- GhcUnregisterised=YES.
171 way_opts <- findBuildTag
172 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
174 pkg_extra_opts <- getPackageExtraGhcOpts
175 extra_non_static <- processArgs static_flags
176 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
178 -- give the static flags to hsc
179 static_opts <- buildStaticHscOpts
180 writeIORef v_Static_hsc_opts static_opts
182 -- build the default DynFlags (these may be adjusted on a per
183 -- module basis by OPTIONS pragmas and settings in the interpreter).
185 core_todo <- buildCoreToDo
186 stg_todo <- buildStgToDo
188 -- set the "global" HscLang. The HscLang can be further adjusted on a module
189 -- by module basis, using only the -fvia-C and -fasm flags. If the global
190 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
191 dyn_flags <- getDynFlags
192 let lang = case mode of
193 DoInteractive -> HscInterpreted
194 _other -> hscLang dyn_flags
196 setDynFlags (dyn_flags{ coreToDo = core_todo,
199 -- leave out hscOutName for now
200 hscOutName = panic "Main.main:hscOutName not set",
204 -- the rest of the arguments are "dynamic"
205 srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
207 -- save the "initial DynFlags" away
210 -- complain about any unknown flags
211 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
213 verb <- dynFlag verbosity
215 -- Show the GHCi banner
217 when (mode == DoInteractive && verb >= 1) $
218 hPutStrLn stdout ghciWelcomeMsg
221 -- Display details of the configuration in verbose mode
223 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
224 hPutStr stderr cProjectVersion
225 hPutStr stderr ", for Haskell 98, compiled by GHC version "
226 hPutStrLn stderr cBooterVersion)
229 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
231 pkg_details <- readIORef v_Package_details
232 showPackages pkg_details
235 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
237 -- initialise the finder
238 pkg_avails <- getPackageInfo
239 initFinder pkg_avails
241 -- mkdependHS is special
242 when (mode == DoMkDependHS) beginMkDependHS
244 -- -ohi sanity checking
245 ohi <- readIORef v_Output_hi
247 (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
248 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
251 -- make/interactive require invoking the compilation manager
252 if (mode == DoMake) then beginMake srcs else do
253 if (mode == DoInteractive) then beginInteractive srcs else do
255 -- -o sanity checking
256 o_file <- readIORef v_Output_file
257 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
258 then throwDyn (UsageError "can't apply -o to multiple source files")
261 if null srcs then throwDyn (UsageError "no input files") else do
263 let compileFile src = do
266 exists <- doesFileExist src
268 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
270 -- We compile in two stages, because the file may have an
271 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
272 let (basename, suffix) = splitFilename src
274 -- just preprocess (Haskell source only)
275 let src_and_suff = (src, getFileSuffix src)
276 let not_hs_file = not (haskellish_src_file src)
277 pp <- if not_hs_file || mode == StopBefore Hsc || mode == StopBefore HsPp
278 then return src_and_suff else do
279 phases <- genPipeline (StopBefore Hsc) stop_flag
280 False{-not persistent-} defaultHscLang
282 pipeLoop phases src_and_suff False{-no linking-} False{-no -o flag-}
285 -- rest of compilation
286 hsc_lang <- dynFlag hscLang
287 phases <- genPipeline mode stop_flag True hsc_lang pp
288 (r,_) <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL)
289 True{-use -o flag-} basename suffix
292 o_files <- mapM compileFile srcs
294 when (mode == DoMkDependHS) endMkDependHS
295 when (mode == DoLink) (doLink o_files)
296 when (mode == DoMkDLL) (doMkDLL o_files)
300 beginMake :: [String] -> IO ()
301 beginMake fileish_args
302 = do let (objs, mods) = partition objish_file fileish_args
303 mapM (add v_Ld_inputs) objs
306 [] -> throwDyn (UsageError "no input files")
307 _ -> do dflags <- getDynFlags
308 state <- cmInit Batch
309 graph <- cmDepAnal state dflags mods
310 (_, ok, _) <- cmLoadModules state dflags graph
311 when (not ok) (exitWith (ExitFailure 1))
315 beginInteractive :: [String] -> IO ()
317 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
319 beginInteractive fileish_args
320 = do minus_ls <- readIORef v_Cmdline_libraries
322 let (objs, mods) = partition objish_file fileish_args
323 libs = map Left objs ++ map Right minus_ls
325 state <- cmInit Interactive
326 interactiveUI state mods libs