1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.74 2001/06/18 21:45:49 sof 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(..) )
66 #ifndef mingw32_TARGET_OS
67 import Concurrent ( myThreadId )
68 #ifdef __GLASGOW_HASKELL__ < 500
69 import Exception ( raiseInThread )
70 #define throwTo raiseInThread
72 import Exception ( throwTo )
75 import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
76 import Dynamic ( toDyn )
80 -----------------------------------------------------------------------------
83 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
84 -- dynamic flag whereas -package is a static flag.)
86 -----------------------------------------------------------------------------
89 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
90 -- time commands when run with -v
94 -- Win32 support: proper signal handling
95 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
96 -- reading the package configuration file is too slow
99 -----------------------------------------------------------------------------
100 -- Differences vs. old driver:
102 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
103 -- consistency checking removed (may do this properly later)
107 -----------------------------------------------------------------------------
111 -- top-level exception handler: any unrecognised exception is a compiler bug.
112 handle (\exception -> do hPutStr stderr (show (Panic (show exception)))
113 exitWith (ExitFailure 1)
116 -- all error messages are propagated as exceptions
117 handleDyn (\dyn -> case dyn of
118 PhaseFailed _phase code -> exitWith code
119 Interrupted -> exitWith (ExitFailure 1)
120 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
121 exitWith (ExitFailure 1)
124 -- make sure we clean up after ourselves
125 later (do forget_it <- readIORef v_Keep_tmp_files
126 unless forget_it $ do
127 verb <- dynFlag verbosity
130 -- exceptions will be blocked while we clean the temporary files,
131 -- so there shouldn't be any difficulty if we receive further
134 -- install signal handlers
135 #ifndef mingw32_TARGET_OS
136 main_thread <- myThreadId
137 let sig_handler = Catch (throwTo main_thread
138 (DynException (toDyn Interrupted)))
139 installHandler sigQUIT sig_handler Nothing
140 installHandler sigINT sig_handler Nothing
144 let (minusB_args, argv') = partition (prefixMatch "-B") argv
145 top_dir <- initSysTools minusB_args
147 -- Read the package configuration
148 conf_file <- packageConfigPath
149 proto_pkg_details <- loadPackageConfig conf_file
150 let pkg_details = mungePackagePaths top_dir proto_pkg_details
151 writeIORef v_Package_details pkg_details
153 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
154 (flags2, mode, stop_flag) <- getGhcMode argv'
155 writeIORef v_GhcMode mode
157 -- Show the GHCi banner?
159 when (mode == DoInteractive) $
160 hPutStrLn stdout ghciWelcomeMsg
163 -- process all the other arguments, and get the source files
164 non_static <- processArgs static_flags flags2 []
166 -- -O and --interactive are not a good combination
167 -- ditto with any kind of way selection
168 orig_opt_level <- readIORef v_OptLevel
169 when (orig_opt_level > 0 && mode == DoInteractive) $
170 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
171 writeIORef v_OptLevel 0
172 orig_ways <- readIORef v_Ways
173 when (not (null orig_ways) && mode == DoInteractive) $
174 do throwDyn (UsageError
175 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
177 -- Find the build tag, and re-process the build-specific options.
178 -- Also add in flags for unregisterised compilation, if
179 -- GhcUnregisterised=YES.
180 way_opts <- findBuildTag
181 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
183 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
185 -- give the static flags to hsc
186 static_opts <- buildStaticHscOpts
187 writeIORef v_Static_hsc_opts static_opts
189 -- build the default DynFlags (these may be adjusted on a per
190 -- module basis by OPTIONS pragmas and settings in the interpreter).
192 core_todo <- buildCoreToDo
193 stg_todo <- buildStgToDo
195 -- set the "global" HscLang. The HscLang can be further adjusted on a module
196 -- by module basis, using only the -fvia-C and -fasm flags. If the global
197 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
198 opt_level <- readIORef v_OptLevel
201 let lang = case mode of
202 StopBefore HCc -> HscC
203 DoInteractive -> HscInterpreted
204 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
205 | otherwise -> defaultHscLang
207 setDynFlags (defaultDynFlags{ coreToDo = core_todo,
210 -- leave out hscOutName for now
211 hscOutName = panic "Main.main:hscOutName not set",
213 verbosity = case mode of
219 -- the rest of the arguments are "dynamic"
220 srcs <- processArgs dynamic_flags (way_non_static ++ non_static) []
222 -- save the "initial DynFlags" away
225 -- complain about any unknown flags
226 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
228 -- Display details of the configuration in verbose mode
229 verb <- dynFlag verbosity
232 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
233 hPutStr stderr cProjectVersion
234 hPutStr stderr ", for Haskell 98, compiled by GHC version "
235 hPutStrLn stderr cBooterVersion)
238 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
241 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
243 showPackages pkg_details
245 -- initialise the finder
246 pkg_avails <- getPackageInfo
247 initFinder pkg_avails
249 -- mkdependHS is special
250 when (mode == DoMkDependHS) beginMkDependHS
252 -- -ohi sanity checking
253 ohi <- readIORef v_Output_hi
255 (mode == DoMake || mode == DoInteractive || length srcs > 1))
256 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
259 -- make/interactive require invoking the compilation manager
260 if (mode == DoMake) then beginMake srcs else do
261 if (mode == DoInteractive) then beginInteractive srcs else do
263 -- -o sanity checking
264 o_file <- readIORef v_Output_file
265 if (length srcs > 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
266 then throwDyn (UsageError "can't apply -o to multiple source files")
269 if null srcs then throwDyn (UsageError "no input files") else do
271 let compileFile src = do
274 exists <- doesFileExist src
276 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
278 -- We compile in two stages, because the file may have an
279 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
280 let (basename, suffix) = splitFilename src
282 -- just preprocess (Haskell source only)
283 pp <- if not (haskellish_src_file src) || mode == StopBefore Hsc
284 then return src else do
285 phases <- genPipeline (StopBefore Hsc) stop_flag
286 False{-not persistent-} defaultHscLang src
287 pipeLoop phases src False{-no linking-} False{-no -o flag-}
290 -- rest of compilation
291 hsc_lang <- dynFlag hscLang
292 phases <- genPipeline mode stop_flag True hsc_lang pp
293 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
297 o_files <- mapM compileFile srcs
299 when (mode == DoMkDependHS) endMkDependHS
300 when (mode == DoLink) (doLink o_files)
301 when (mode == DoMkDLL) (doMkDLL o_files)
305 beginMake :: [String] -> IO ()
306 beginMake fileish_args
307 = do let (objs, mods) = partition objish_file fileish_args
308 mapM (add v_Ld_inputs) objs
311 [] -> throwDyn (UsageError "no input files")
312 [mod] -> do state <- cmInit Batch
313 cmLoadModule state mod
315 _ -> throwDyn (UsageError "only one module allowed with --make")
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
330 [] -> interactiveUI state Nothing libs
331 [mod] -> interactiveUI state (Just mod) libs
332 _ -> throwDyn (UsageError
333 "only one module allowed with --interactive")