1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.71 2001/06/14 15:42:35 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 CmStaticInfo ( GhciMode(..), PackageConfig(..) )
27 import Config ( cBooterVersion, cGhcUnregisterised, cProjectVersion )
28 import SysTools ( packageConfigPath, initSysTools, cleanTempFiles )
29 import ParsePkgConf ( parsePkgConf )
31 import DriverPipeline ( GhcMode(..), doLink, doMkDLL, genPipeline,
32 getGhcMode, pipeLoop, v_GhcMode
34 import DriverState ( buildCoreToDo, buildStgToDo, defaultHscLang,
35 findBuildTag, getPackageInfo, unregFlags, v_Cmdline_libraries,
36 v_Keep_tmp_files, v_Ld_inputs, v_OptLevel, v_Output_file,
37 v_Output_hi, v_Package_details, v_Ways
39 import DriverFlags ( dynFlag, buildStaticHscOpts, dynamic_flags, processArgs, static_flags)
41 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
42 import DriverPhases ( Phase(Hsc, HCc), haskellish_src_file, objish_file )
44 import DriverUtil ( add, handle, handleDyn, later, splitFilename, unknownFlagErr, my_prefix_match )
45 import CmdLineOpts ( dynFlag,
46 DynFlags(verbosity, stgToDo, hscOutName, hscLang, coreToDo),
47 HscLang(HscInterpreted, HscC),
48 defaultDynFlags, restoreDynFlags, saveDynFlags, setDynFlags,
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, throwTo )
65 import Posix ( Handler(Catch), installHandler, sigINT, sigQUIT )
66 import Dynamic ( toDyn )
74 -----------------------------------------------------------------------------
77 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
78 -- dynamic flag whereas -package is a static flag.)
80 -----------------------------------------------------------------------------
83 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
84 -- time commands when run with -v
88 -- Win32 support: proper signal handling
89 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
90 -- reading the package configuration file is too slow
93 -----------------------------------------------------------------------------
94 -- Differences vs. old driver:
96 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
97 -- 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 hPutStr stderr (show (Panic (show exception)))
107 exitWith (ExitFailure 1)
110 -- all error messages are propagated as exceptions
111 handleDyn (\dyn -> case dyn of
112 PhaseFailed _phase code -> exitWith code
113 Interrupted -> exitWith (ExitFailure 1)
114 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
115 exitWith (ExitFailure 1)
118 -- make sure we clean up after ourselves
119 later (do forget_it <- readIORef v_Keep_tmp_files
120 unless forget_it $ do
121 verb <- dynFlag verbosity
124 -- exceptions will be blocked while we clean the temporary files,
125 -- so there shouldn't be any difficulty if we receive further
128 -- install signal handlers
129 #ifndef mingw32_TARGET_OS
130 main_thread <- myThreadId
131 let sig_handler = Catch (throwTo main_thread
132 (DynException (toDyn Interrupted)))
133 installHandler sigQUIT sig_handler Nothing
134 installHandler sigINT sig_handler Nothing
138 let (minusB_args, argv') = partition (prefixMatch "-B") argv
139 top_dir <- initSysTools minusB_args
141 -- read the package configuration
142 conf_file <- packageConfigPath
143 r <- parsePkgConf conf_file
145 Left err -> throwDyn (InstallationError (showSDoc err));
146 Right pkg_details -> do
148 writeIORef v_Package_details (mungePackagePaths top_dir pkg_details)
150 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
151 (flags2, mode, stop_flag) <- getGhcMode argv'
152 writeIORef v_GhcMode mode
154 -- Show the GHCi banner?
156 when (mode == DoInteractive) $
157 hPutStrLn stdout ghciWelcomeMsg
160 -- process all the other arguments, and get the source files
161 non_static <- processArgs static_flags flags2 []
163 -- -O and --interactive are not a good combination
164 -- ditto with any kind of way selection
165 orig_opt_level <- readIORef v_OptLevel
166 when (orig_opt_level > 0 && mode == DoInteractive) $
167 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
168 writeIORef v_OptLevel 0
169 orig_ways <- readIORef v_Ways
170 when (not (null orig_ways) && mode == DoInteractive) $
171 do throwDyn (UsageError
172 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
174 -- Find the build tag, and re-process the build-specific options.
175 -- Also add in flags for unregisterised compilation, if
176 -- GhcUnregisterised=YES.
177 way_opts <- findBuildTag
178 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
180 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
182 -- give the static flags to hsc
183 static_opts <- buildStaticHscOpts
184 writeIORef v_Static_hsc_opts static_opts
186 -- build the default DynFlags (these may be adjusted on a per
187 -- module basis by OPTIONS pragmas and settings in the interpreter).
189 core_todo <- buildCoreToDo
190 stg_todo <- buildStgToDo
192 -- set the "global" HscLang. The HscLang can be further adjusted on a module
193 -- by module basis, using only the -fvia-C and -fasm flags. If the global
194 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
195 opt_level <- readIORef v_OptLevel
198 let lang = case mode of
199 StopBefore HCc -> HscC
200 DoInteractive -> HscInterpreted
201 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
202 | otherwise -> defaultHscLang
204 setDynFlags (defaultDynFlags{ coreToDo = core_todo,
207 -- leave out hscOutName for now
208 hscOutName = panic "Main.main:hscOutName not set",
210 verbosity = case mode of
216 -- the rest of the arguments are "dynamic"
217 srcs <- processArgs dynamic_flags (way_non_static ++ non_static) []
219 -- save the "initial DynFlags" away
222 -- complain about any unknown flags
223 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
225 verb <- dynFlag verbosity
228 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
229 hPutStr stderr cProjectVersion
230 hPutStr stderr ", for Haskell 98, compiled by GHC version "
231 hPutStrLn stderr cBooterVersion)
234 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
237 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
239 -- initialise the finder
240 pkg_avails <- getPackageInfo
241 initFinder pkg_avails
243 -- mkdependHS is special
244 when (mode == DoMkDependHS) beginMkDependHS
246 -- -ohi sanity checking
247 ohi <- readIORef v_Output_hi
249 (mode == DoMake || mode == DoInteractive || length srcs > 1))
250 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
253 -- make/interactive require invoking the compilation manager
254 if (mode == DoMake) then beginMake srcs else do
255 if (mode == DoInteractive) then beginInteractive srcs else do
257 -- -o sanity checking
258 o_file <- readIORef v_Output_file
259 if (length srcs > 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
260 then throwDyn (UsageError "can't apply -o to multiple source files")
263 if null srcs then throwDyn (UsageError "no input files") else do
265 let compileFile src = do
268 exists <- doesFileExist src
270 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
272 -- We compile in two stages, because the file may have an
273 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
274 let (basename, suffix) = splitFilename src
276 -- just preprocess (Haskell source only)
277 pp <- if not (haskellish_src_file src) || mode == StopBefore Hsc
278 then return src else do
279 phases <- genPipeline (StopBefore Hsc) stop_flag
280 False{-not persistent-} defaultHscLang src
281 pipeLoop phases src False{-no linking-} False{-no -o flag-}
284 -- rest of compilation
285 hsc_lang <- dynFlag hscLang
286 phases <- genPipeline mode stop_flag True hsc_lang pp
287 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
291 o_files <- mapM compileFile srcs
293 when (mode == DoMkDependHS) endMkDependHS
294 when (mode == DoLink) (doLink o_files)
295 when (mode == DoMkDLL) (doMkDLL o_files)
299 -- replace the string "$libdir" at the beginning of a path with the
300 -- current libdir (obtained from the -B option).
301 mungePackagePaths top_dir ps = map munge_pkg ps
303 munge_pkg p = p{ import_dirs = munge_paths (import_dirs p),
304 include_dirs = munge_paths (include_dirs p),
305 library_dirs = munge_paths (library_dirs p) }
307 munge_paths = map munge_path
310 | Just p' <- my_prefix_match "$libdir" p = top_dir ++ p'
311 | otherwise = trace ("not: " ++ p) p
314 beginMake :: [String] -> IO ()
315 beginMake fileish_args
316 = do let (objs, mods) = partition objish_file fileish_args
317 mapM (add v_Ld_inputs) objs
320 [] -> throwDyn (UsageError "no input files")
321 [mod] -> do state <- cmInit Batch
322 cmLoadModule state mod
324 _ -> throwDyn (UsageError "only one module allowed with --make")
327 beginInteractive :: [String] -> IO ()
329 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
331 beginInteractive fileish_args
332 = do minus_ls <- readIORef v_Cmdline_libraries
334 let (objs, mods) = partition objish_file fileish_args
335 libs = map Left objs ++ map Right minus_ls
337 state <- cmInit Interactive
339 [] -> interactiveUI state Nothing libs
340 [mod] -> interactiveUI state (Just mod) libs
341 _ -> throwDyn (UsageError
342 "only one module allowed with --interactive")