1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.92 2001/12/05 00:08:27 sof Exp $
8 -- (c) Simon Marlow 2000
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, cmLoadModule )
27 import HscTypes ( GhciMode(..) )
28 import Config ( cBooterVersion, cGhcUnregisterised, cProjectVersion )
29 import SysTools ( getPackageConfigPath, initSysTools, cleanTempFiles )
30 import Packages ( showPackages )
32 import DriverPipeline ( GhcMode(..), doLink, doMkDLL, genPipeline,
33 getGhcMode, pipeLoop, v_GhcMode
35 import DriverState ( buildCoreToDo, buildStgToDo, defaultHscLang,
36 findBuildTag, getPackageInfo, unregFlags,
37 v_Cmdline_libraries, v_Keep_tmp_files, v_Ld_inputs,
38 v_OptLevel, v_Output_file, v_Output_hi,
39 v_Package_details, v_Ways, getPackageExtraGhcOpts,
42 import DriverFlags ( dynFlag, buildStaticHscOpts, dynamic_flags,
43 processArgs, static_flags)
45 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
46 import DriverPhases ( Phase(HsPp, Hsc, HCc), haskellish_src_file, objish_file )
48 import DriverUtil ( add, handle, handleDyn, later, splitFilename,
49 unknownFlagErr, getFileSuffix )
50 import CmdLineOpts ( dynFlag, defaultDynFlags, restoreDynFlags,
51 saveDynFlags, setDynFlags,
52 DynFlags(..), HscLang(..), v_Static_hsc_opts
57 import Panic ( GhcException(..), panic )
59 -- Standard Haskell libraries
61 import Directory ( doesFileExist )
62 import IOExts ( readIORef, writeIORef )
63 import Exception ( throwDyn, Exception(..) )
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 )
83 -----------------------------------------------------------------------------
86 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
87 -- dynamic flag whereas -package is a static flag.)
89 -----------------------------------------------------------------------------
92 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
93 -- time commands when run with -v
97 -- Win32 support: proper signal handling
98 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
99 -- reading the package configuration file is too slow
102 -----------------------------------------------------------------------------
103 -- Differences vs. old driver:
105 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
106 -- consistency checking removed (may do this properly later)
110 -----------------------------------------------------------------------------
114 -- top-level exception handler: any unrecognised exception is a compiler bug.
115 handle (\exception -> do
118 -- an IO exception probably isn't our fault, so don't panic
119 IOException _ -> hPutStr stderr (show exception)
120 _other -> hPutStr stderr (show (Panic (show exception)))
121 exitWith (ExitFailure 1)
124 -- all error messages are propagated as exceptions
125 handleDyn (\dyn -> do
128 PhaseFailed _ code -> exitWith code
129 Interrupted -> exitWith (ExitFailure 1)
130 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
131 exitWith (ExitFailure 1)
134 -- make sure we clean up after ourselves
135 later (do forget_it <- readIORef v_Keep_tmp_files
136 unless forget_it $ do
137 verb <- dynFlag verbosity
140 -- exceptions will be blocked while we clean the temporary files,
141 -- so there shouldn't be any difficulty if we receive further
144 -- install signal handlers
145 #ifndef mingw32_TARGET_OS
146 main_thread <- myThreadId
147 let sig_handler = Catch (throwTo main_thread
148 (DynException (toDyn Interrupted)))
149 installHandler sigQUIT sig_handler Nothing
150 installHandler sigINT sig_handler Nothing
154 let (minusB_args, argv') = partition (prefixMatch "-B") argv
155 top_dir <- initSysTools minusB_args
157 -- Read the package configuration
158 conf_file <- getPackageConfigPath
159 readPackageConf conf_file
161 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
162 (flags2, mode, stop_flag) <- getGhcMode argv'
163 writeIORef v_GhcMode mode
165 -- process all the other arguments, and get the source files
166 non_static <- processArgs static_flags flags2 []
168 -- -O and --interactive are not a good combination
169 -- ditto with any kind of way selection
170 orig_opt_level <- readIORef v_OptLevel
171 when (orig_opt_level > 0 && mode == DoInteractive) $
172 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
173 writeIORef v_OptLevel 0
174 orig_ways <- readIORef v_Ways
175 when (not (null orig_ways) && mode == DoInteractive) $
176 do throwDyn (UsageError
177 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
179 -- Find the build tag, and re-process the build-specific options.
180 -- Also add in flags for unregisterised compilation, if
181 -- GhcUnregisterised=YES.
182 way_opts <- findBuildTag
183 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
185 pkg_extra_opts <- getPackageExtraGhcOpts
186 extra_non_static <- processArgs static_flags
187 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
189 -- give the static flags to hsc
190 static_opts <- buildStaticHscOpts
191 writeIORef v_Static_hsc_opts static_opts
193 -- build the default DynFlags (these may be adjusted on a per
194 -- module basis by OPTIONS pragmas and settings in the interpreter).
196 core_todo <- buildCoreToDo
197 stg_todo <- buildStgToDo
199 -- set the "global" HscLang. The HscLang can be further adjusted on a module
200 -- by module basis, using only the -fvia-C and -fasm flags. If the global
201 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
202 opt_level <- readIORef v_OptLevel
205 let lang = case mode of
206 StopBefore HCc -> HscC
207 DoInteractive -> HscInterpreted
208 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
209 | otherwise -> defaultHscLang
211 setDynFlags (defaultDynFlags{ coreToDo = core_todo,
214 -- leave out hscOutName for now
215 hscOutName = panic "Main.main:hscOutName not set",
220 -- the rest of the arguments are "dynamic"
221 srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
223 -- save the "initial DynFlags" away
226 -- complain about any unknown flags
227 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
229 verb <- dynFlag verbosity
231 -- Show the GHCi banner
233 when (mode == DoInteractive && verb >= 1) $
234 hPutStrLn stdout ghciWelcomeMsg
237 -- Display details of the configuration in verbose mode
239 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
240 hPutStr stderr cProjectVersion
241 hPutStr stderr ", for Haskell 98, compiled by GHC version "
242 hPutStrLn stderr cBooterVersion)
245 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
247 pkg_details <- readIORef v_Package_details
248 showPackages pkg_details
251 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
253 -- initialise the finder
254 pkg_avails <- getPackageInfo
255 initFinder pkg_avails
257 -- mkdependHS is special
258 when (mode == DoMkDependHS) beginMkDependHS
260 -- -ohi sanity checking
261 ohi <- readIORef v_Output_hi
263 (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
264 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
267 -- make/interactive require invoking the compilation manager
268 if (mode == DoMake) then beginMake srcs else do
269 if (mode == DoInteractive) then beginInteractive srcs else do
271 -- -o sanity checking
272 o_file <- readIORef v_Output_file
273 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
274 then throwDyn (UsageError "can't apply -o to multiple source files")
277 if null srcs then throwDyn (UsageError "no input files") else do
279 let compileFile src = do
282 exists <- doesFileExist src
284 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
286 -- We compile in two stages, because the file may have an
287 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
288 let (basename, suffix) = splitFilename src
290 -- just preprocess (Haskell source only)
291 let src_and_suff = (src, getFileSuffix src)
292 let not_hs_file = not (haskellish_src_file src)
293 pp <- if not_hs_file || mode == StopBefore Hsc || mode == StopBefore HsPp
294 then return src_and_suff else do
295 phases <- genPipeline (StopBefore Hsc) stop_flag
296 False{-not persistent-} defaultHscLang
298 pipeLoop phases src_and_suff False{-no linking-} False{-no -o flag-}
301 -- rest of compilation
302 hsc_lang <- dynFlag hscLang
303 phases <- genPipeline mode stop_flag True hsc_lang pp
304 (r,_) <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL)
305 True{-use -o flag-} basename suffix
308 o_files <- mapM compileFile srcs
310 when (mode == DoMkDependHS) endMkDependHS
311 when (mode == DoLink) (doLink o_files)
312 when (mode == DoMkDLL) (doMkDLL o_files)
316 beginMake :: [String] -> IO ()
317 beginMake fileish_args
318 = do let (objs, mods) = partition objish_file fileish_args
319 mapM (add v_Ld_inputs) objs
322 [] -> throwDyn (UsageError "no input files")
323 mod -> do state <- cmInit Batch
324 (_, ok, _) <- cmLoadModule state mods
325 when (not ok) (exitWith (ExitFailure 1))
329 beginInteractive :: [String] -> IO ()
331 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
333 beginInteractive fileish_args
334 = do minus_ls <- readIORef v_Cmdline_libraries
336 let (objs, mods) = partition objish_file fileish_args
337 libs = map Left objs ++ map Right minus_ls
339 state <- cmInit Interactive
340 interactiveUI state mods libs