1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.73 2001/06/18 08:56:09 simonpj 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, v_Cmdline_libraries,
37 v_Keep_tmp_files, v_Ld_inputs, v_OptLevel, v_Output_file,
38 v_Output_hi, v_Package_details, v_Ways
40 import DriverFlags ( dynFlag, buildStaticHscOpts, dynamic_flags, processArgs, static_flags)
42 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
43 import DriverPhases ( Phase(Hsc, HCc), haskellish_src_file, objish_file )
45 import DriverUtil ( add, handle, handleDyn, later, splitFilename, unknownFlagErr, my_prefix_match )
46 import CmdLineOpts ( dynFlag, defaultDynFlags, restoreDynFlags, saveDynFlags, setDynFlags,
47 DynFlags(..), HscLang(..),
52 import ErrUtils ( dumpIfSet )
54 import Panic ( GhcException(..), panic )
56 -- Standard Haskell libraries
58 import Directory ( doesFileExist )
59 import IOExts ( readIORef, writeIORef )
60 import Exception ( throwDyn, Exception(DynException) )
61 import System ( getArgs, exitWith, ExitCode(..) )
63 #ifndef mingw32_TARGET_OS
64 import Concurrent ( myThreadId )
65 import Exception ( throwTo )
66 import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
67 import Dynamic ( toDyn )
75 -----------------------------------------------------------------------------
78 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
79 -- dynamic flag whereas -package is a static flag.)
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)
102 -----------------------------------------------------------------------------
106 -- top-level exception handler: any unrecognised exception is a compiler bug.
107 handle (\exception -> do hPutStr stderr (show (Panic (show exception)))
108 exitWith (ExitFailure 1)
111 -- all error messages are propagated as exceptions
112 handleDyn (\dyn -> case dyn of
113 PhaseFailed _phase code -> exitWith code
114 Interrupted -> exitWith (ExitFailure 1)
115 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
116 exitWith (ExitFailure 1)
119 -- make sure we clean up after ourselves
120 later (do forget_it <- readIORef v_Keep_tmp_files
121 unless forget_it $ do
122 verb <- dynFlag verbosity
125 -- exceptions will be blocked while we clean the temporary files,
126 -- so there shouldn't be any difficulty if we receive further
129 -- install signal handlers
130 #ifndef mingw32_TARGET_OS
131 main_thread <- myThreadId
132 let sig_handler = Catch (throwTo main_thread
133 (DynException (toDyn Interrupted)))
134 installHandler sigQUIT sig_handler Nothing
135 installHandler sigINT sig_handler Nothing
139 let (minusB_args, argv') = partition (prefixMatch "-B") argv
140 top_dir <- initSysTools minusB_args
142 -- Read the package configuration
143 conf_file <- packageConfigPath
144 proto_pkg_details <- loadPackageConfig conf_file
145 let pkg_details = mungePackagePaths top_dir proto_pkg_details
146 writeIORef v_Package_details pkg_details
148 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
149 (flags2, mode, stop_flag) <- getGhcMode argv'
150 writeIORef v_GhcMode mode
152 -- Show the GHCi banner?
154 when (mode == DoInteractive) $
155 hPutStrLn stdout ghciWelcomeMsg
158 -- process all the other arguments, and get the source files
159 non_static <- processArgs static_flags flags2 []
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 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
180 -- give the static flags to hsc
181 static_opts <- buildStaticHscOpts
182 writeIORef v_Static_hsc_opts static_opts
184 -- build the default DynFlags (these may be adjusted on a per
185 -- module basis by OPTIONS pragmas and settings in the interpreter).
187 core_todo <- buildCoreToDo
188 stg_todo <- buildStgToDo
190 -- set the "global" HscLang. The HscLang can be further adjusted on a module
191 -- by module basis, using only the -fvia-C and -fasm flags. If the global
192 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
193 opt_level <- readIORef v_OptLevel
196 let lang = case mode of
197 StopBefore HCc -> HscC
198 DoInteractive -> HscInterpreted
199 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
200 | otherwise -> defaultHscLang
202 setDynFlags (defaultDynFlags{ coreToDo = core_todo,
205 -- leave out hscOutName for now
206 hscOutName = panic "Main.main:hscOutName not set",
208 verbosity = case mode of
214 -- the rest of the arguments are "dynamic"
215 srcs <- processArgs dynamic_flags (way_non_static ++ non_static) []
217 -- save the "initial DynFlags" away
220 -- complain about any unknown flags
221 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
223 -- Display details of the configuration in verbose mode
224 verb <- dynFlag verbosity
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))
236 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
238 showPackages pkg_details
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 || length srcs > 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 (length srcs > 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 pp <- if not (haskellish_src_file src) || mode == StopBefore Hsc
279 then return src else do
280 phases <- genPipeline (StopBefore Hsc) stop_flag
281 False{-not persistent-} defaultHscLang src
282 pipeLoop phases src 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) True{-use -o flag-}
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 [mod] -> do state <- cmInit Batch
308 cmLoadModule state mod
310 _ -> throwDyn (UsageError "only one module allowed with --make")
313 beginInteractive :: [String] -> IO ()
315 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
317 beginInteractive fileish_args
318 = do minus_ls <- readIORef v_Cmdline_libraries
320 let (objs, mods) = partition objish_file fileish_args
321 libs = map Left objs ++ map Right minus_ls
323 state <- cmInit Interactive
325 [] -> interactiveUI state Nothing libs
326 [mod] -> interactiveUI state (Just mod) libs
327 _ -> throwDyn (UsageError
328 "only one module allowed with --interactive")