1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.78 2001/06/29 15:30:49 simonmar Exp $
7 -- (c) Simon Marlow 2000
9 -----------------------------------------------------------------------------
11 -- with path so that ghc -M can find config.h
12 #include "../includes/config.h"
14 module Main (main) where
16 #include "HsVersions.h"
20 import InteractiveUI(ghciWelcomeMsg, interactiveUI)
24 import Finder ( initFinder )
25 import CompManager ( cmInit, cmLoadModule )
26 import HscTypes ( GhciMode(..) )
27 import Config ( cBooterVersion, cGhcUnregisterised, cProjectVersion )
28 import SysTools ( packageConfigPath, initSysTools, cleanTempFiles )
29 import Packages ( showPackages, mungePackagePaths )
30 import ParsePkgConf ( loadPackageConfig )
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
41 import DriverFlags ( dynFlag, buildStaticHscOpts, dynamic_flags,
42 processArgs, static_flags)
44 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
45 import DriverPhases ( Phase(Hsc, HCc), haskellish_src_file, objish_file )
47 import DriverUtil ( add, handle, handleDyn, later, splitFilename,
49 import CmdLineOpts ( dynFlag, defaultDynFlags, restoreDynFlags,
50 saveDynFlags, setDynFlags,
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 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 )
82 -----------------------------------------------------------------------------
85 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
86 -- dynamic flag whereas -package is a static flag.)
88 -----------------------------------------------------------------------------
91 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
92 -- time commands when run with -v
96 -- Win32 support: proper signal handling
97 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
98 -- reading the package configuration file is too slow
101 -----------------------------------------------------------------------------
102 -- Differences vs. old driver:
104 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
105 -- consistency checking removed (may do this properly later)
109 -----------------------------------------------------------------------------
113 -- top-level exception handler: any unrecognised exception is a compiler bug.
114 handle (\exception -> do
116 -- an IO exception probably isn't our fault, so don't panic
117 IOException _ -> hPutStr stderr (show exception)
118 _other -> hPutStr stderr (show (Panic (show exception)))
119 exitWith (ExitFailure 1)
122 -- all error messages are propagated as exceptions
123 handleDyn (\dyn -> case dyn of
124 PhaseFailed _phase code -> exitWith code
125 Interrupted -> exitWith (ExitFailure 1)
126 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
127 exitWith (ExitFailure 1)
130 -- make sure we clean up after ourselves
131 later (do forget_it <- readIORef v_Keep_tmp_files
132 unless forget_it $ do
133 verb <- dynFlag verbosity
136 -- exceptions will be blocked while we clean the temporary files,
137 -- so there shouldn't be any difficulty if we receive further
140 -- install signal handlers
141 #ifndef mingw32_TARGET_OS
142 main_thread <- myThreadId
143 let sig_handler = Catch (throwTo main_thread
144 (DynException (toDyn Interrupted)))
145 installHandler sigQUIT sig_handler Nothing
146 installHandler sigINT sig_handler Nothing
150 let (minusB_args, argv') = partition (prefixMatch "-B") argv
151 top_dir <- initSysTools minusB_args
153 -- Read the package configuration
154 conf_file <- packageConfigPath
155 proto_pkg_details <- loadPackageConfig conf_file
156 let pkg_details = mungePackagePaths top_dir proto_pkg_details
157 writeIORef v_Package_details pkg_details
159 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
160 (flags2, mode, stop_flag) <- getGhcMode argv'
161 writeIORef v_GhcMode mode
163 -- Show the GHCi banner?
165 when (mode == DoInteractive) $
166 hPutStrLn stdout ghciWelcomeMsg
169 -- process all the other arguments, and get the source files
170 non_static <- processArgs static_flags flags2 []
172 -- -O and --interactive are not a good combination
173 -- ditto with any kind of way selection
174 orig_opt_level <- readIORef v_OptLevel
175 when (orig_opt_level > 0 && mode == DoInteractive) $
176 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
177 writeIORef v_OptLevel 0
178 orig_ways <- readIORef v_Ways
179 when (not (null orig_ways) && mode == DoInteractive) $
180 do throwDyn (UsageError
181 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
183 -- Find the build tag, and re-process the build-specific options.
184 -- Also add in flags for unregisterised compilation, if
185 -- GhcUnregisterised=YES.
186 way_opts <- findBuildTag
187 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
189 pkg_extra_opts <- getPackageExtraGhcOpts
190 extra_non_static <- processArgs static_flags
191 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
193 -- give the static flags to hsc
194 static_opts <- buildStaticHscOpts
195 writeIORef v_Static_hsc_opts static_opts
197 -- build the default DynFlags (these may be adjusted on a per
198 -- module basis by OPTIONS pragmas and settings in the interpreter).
200 core_todo <- buildCoreToDo
201 stg_todo <- buildStgToDo
203 -- set the "global" HscLang. The HscLang can be further adjusted on a module
204 -- by module basis, using only the -fvia-C and -fasm flags. If the global
205 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
206 opt_level <- readIORef v_OptLevel
209 let lang = case mode of
210 StopBefore HCc -> HscC
211 DoInteractive -> HscInterpreted
212 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
213 | otherwise -> defaultHscLang
215 setDynFlags (defaultDynFlags{ coreToDo = core_todo,
218 -- leave out hscOutName for now
219 hscOutName = panic "Main.main:hscOutName not set",
221 verbosity = case mode of
227 -- the rest of the arguments are "dynamic"
228 srcs <- processArgs dynamic_flags (extra_non_static ++ non_static) []
230 -- save the "initial DynFlags" away
233 -- complain about any unknown flags
234 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
236 -- Display details of the configuration in verbose mode
237 verb <- dynFlag verbosity
240 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
241 hPutStr stderr cProjectVersion
242 hPutStr stderr ", for Haskell 98, compiled by GHC version "
243 hPutStrLn stderr cBooterVersion)
246 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
249 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
251 showPackages pkg_details
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 || length srcs > 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 (length srcs > 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 pp <- if not (haskellish_src_file src) || mode == StopBefore Hsc
292 then return src else do
293 phases <- genPipeline (StopBefore Hsc) stop_flag
294 False{-not persistent-} defaultHscLang src
295 pipeLoop phases src False{-no linking-} False{-no -o flag-}
298 -- rest of compilation
299 hsc_lang <- dynFlag hscLang
300 phases <- genPipeline mode stop_flag True hsc_lang pp
301 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
305 o_files <- mapM compileFile srcs
307 when (mode == DoMkDependHS) endMkDependHS
308 when (mode == DoLink) (doLink o_files)
309 when (mode == DoMkDLL) (doMkDLL o_files)
313 beginMake :: [String] -> IO ()
314 beginMake fileish_args
315 = do let (objs, mods) = partition objish_file fileish_args
316 mapM (add v_Ld_inputs) objs
319 [] -> throwDyn (UsageError "no input files")
320 mod -> do state <- cmInit Batch
321 cmLoadModule state mods
325 beginInteractive :: [String] -> IO ()
327 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
329 beginInteractive fileish_args
330 = do minus_ls <- readIORef v_Cmdline_libraries
332 let (objs, mods) = partition objish_file fileish_args
333 libs = map Left objs ++ map Right minus_ls
335 state <- cmInit Interactive
336 interactiveUI state mods libs