1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.66 2001/05/28 03:31:19 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"
23 #ifndef mingw32_TARGET_OS
36 import DriverPhases ( Phase(..), haskellish_src_file, objish_file )
39 import Finder ( initFinder )
57 -----------------------------------------------------------------------------
60 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
61 -- dynamic flag whereas -package is a static flag.)
63 -----------------------------------------------------------------------------
67 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
68 -- time commands when run with -v
72 -- Win32 support: proper signal handling
73 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
74 -- reading the package configuration file is too slow
77 -----------------------------------------------------------------------------
78 -- Differences vs. old driver:
80 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
81 -- consistency checking removed (may do this properly later)
85 -----------------------------------------------------------------------------
89 -- top-level exception handler: any unrecognised exception is a compiler bug.
90 handle (\exception -> do hPutStr stderr (show (Panic (show exception)))
91 exitWith (ExitFailure 1)
94 -- all error messages are propagated as exceptions
95 handleDyn (\dyn -> case dyn of
96 PhaseFailed _phase code -> exitWith code
97 Interrupted -> exitWith (ExitFailure 1)
98 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
99 exitWith (ExitFailure 1)
102 -- make sure we clean up after ourselves
103 later (do forget_it <- readIORef v_Keep_tmp_files
104 unless forget_it $ do
105 verb <- dynFlag verbosity
108 -- exceptions will be blocked while we clean the temporary files,
109 -- so there shouldn't be any difficulty if we receive further
112 -- install signal handlers
113 main_thread <- myThreadId
114 #ifndef mingw32_TARGET_OS
115 let sig_handler = Catch (throwTo main_thread
116 (DynException (toDyn Interrupted)))
117 installHandler sigQUIT sig_handler Nothing
118 installHandler sigINT sig_handler Nothing
123 -- grab any -B options from the command line first
124 argv' <- setTopDir argv
125 top_dir <- readIORef v_TopDir
127 let installed s = top_dir ++ '/':s
128 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
130 installed_pkgconfig = installed ("package.conf")
131 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
133 -- discover whether we're running in a build tree or in an installation,
134 -- by looking for the package configuration file.
135 am_installed <- doesFileExist installed_pkgconfig
138 then writeIORef v_Path_package_config installed_pkgconfig
139 else do am_inplace <- doesFileExist inplace_pkgconfig
141 then writeIORef v_Path_package_config inplace_pkgconfig
142 else throwDyn (InstallationError
143 ("Can't find package.conf in " ++
146 -- set the location of our various files
148 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
149 writeIORef v_Pgm_L (installed "unlit")
150 writeIORef v_Pgm_m (installed "ghc-asm")
151 writeIORef v_Pgm_s (installed "ghc-split")
152 #if defined(mingw32_TARGET_OS) && defined(MINIMAL_UNIX_DEPS)
153 writeIORef v_Pgm_T (installed cTOUCH)
156 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
157 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
158 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
159 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
160 #if defined(mingw32_TARGET_OS) && defined(MINIMAL_UNIX_DEPS)
161 writeIORef v_Pgm_T (inplace cTOUCH)
164 -- read the package configuration
165 conf_file <- readIORef v_Path_package_config
166 r <- parsePkgConf conf_file
168 Left err -> throwDyn (InstallationError (showSDoc err));
169 Right pkg_details -> do
171 writeIORef v_Package_details pkg_details
173 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
174 (flags2, mode, stop_flag) <- getGhcMode argv'
175 writeIORef v_GhcMode mode
177 -- Show the GHCi banner?
179 when (mode == DoInteractive) $
180 hPutStrLn stdout ghciWelcomeMsg
183 -- process all the other arguments, and get the source files
184 non_static <- processArgs static_flags flags2 []
186 -- -O and --interactive are not a good combination
187 -- ditto with any kind of way selection
188 orig_opt_level <- readIORef v_OptLevel
189 when (orig_opt_level > 0 && mode == DoInteractive) $
190 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
191 writeIORef v_OptLevel 0
192 orig_ways <- readIORef v_Ways
193 when (not (null orig_ways) && mode == DoInteractive) $
194 do throwDyn (UsageError
195 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
197 -- Find the build tag, and re-process the build-specific options.
198 -- Also add in flags for unregisterised compilation, if
199 -- GhcUnregisterised=YES.
200 way_opts <- findBuildTag
201 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
203 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
205 -- give the static flags to hsc
206 static_opts <- buildStaticHscOpts
207 writeIORef v_Static_hsc_opts static_opts
209 -- build the default DynFlags (these may be adjusted on a per
210 -- module basis by OPTIONS pragmas and settings in the interpreter).
212 core_todo <- buildCoreToDo
213 stg_todo <- buildStgToDo
215 -- set the "global" HscLang. The HscLang can be further adjusted on a module
216 -- by module basis, using only the -fvia-C and -fasm flags. If the global
217 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
218 opt_level <- readIORef v_OptLevel
221 let lang = case mode of
222 StopBefore HCc -> HscC
223 DoInteractive -> HscInterpreted
224 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
225 | otherwise -> defaultHscLang
227 writeIORef v_DynFlags
228 defaultDynFlags{ coreToDo = core_todo,
231 -- leave out hscOutName for now
232 hscOutName = panic "Main.main:hscOutName not set",
234 verbosity = case mode of
240 -- the rest of the arguments are "dynamic"
241 srcs <- processArgs dynamic_flags (way_non_static ++ non_static) []
242 -- save the "initial DynFlags" away
243 init_dyn_flags <- readIORef v_DynFlags
244 writeIORef v_InitDynFlags init_dyn_flags
246 -- complain about any unknown flags
247 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
249 verb <- dynFlag verbosity
252 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
253 hPutStr stderr cProjectVersion
254 hPutStr stderr ", for Haskell 98, compiled by GHC version "
255 hPutStrLn stderr cBooterVersion)
258 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
261 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
263 -- initialise the finder
264 pkg_avails <- getPackageInfo
265 initFinder pkg_avails
267 -- mkdependHS is special
268 when (mode == DoMkDependHS) beginMkDependHS
270 -- -ohi sanity checking
271 ohi <- readIORef v_Output_hi
273 (mode == DoMake || mode == DoInteractive || length srcs > 1))
274 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
277 -- make/interactive require invoking the compilation manager
278 if (mode == DoMake) then beginMake srcs else do
279 if (mode == DoInteractive) then beginInteractive srcs else do
281 -- -o sanity checking
282 o_file <- readIORef v_Output_file
283 if (length srcs > 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
284 then throwDyn (UsageError "can't apply -o to multiple source files")
287 if null srcs then throwDyn (UsageError "no input files") else do
289 let compileFile src = do
290 writeIORef v_DynFlags init_dyn_flags
292 exists <- doesFileExist src
294 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
296 -- We compile in two stages, because the file may have an
297 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
298 let (basename, suffix) = splitFilename src
300 -- just preprocess (Haskell source only)
301 pp <- if not (haskellish_src_file src) || mode == StopBefore Hsc
302 then return src else do
303 phases <- genPipeline (StopBefore Hsc) stop_flag
304 False{-not persistent-} defaultHscLang src
305 pipeLoop phases src False{-no linking-} False{-no -o flag-}
308 -- rest of compilation
309 dyn_flags <- readIORef v_DynFlags
310 phases <- genPipeline mode stop_flag True (hscLang dyn_flags) pp
311 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
315 o_files <- mapM compileFile srcs
317 when (mode == DoMkDependHS) endMkDependHS
318 when (mode == DoLink) (doLink o_files)
319 when (mode == DoMkDLL) (doMkDLL o_files)
321 -- grab the last -B option on the command line, and
322 -- set topDir to its value.
323 setTopDir :: [String] -> IO [String]
325 let (minusbs, others) = partition (prefixMatch "-B") args
327 [] -> throwDyn (InstallationError ("missing -B<dir> option"))
328 some -> writeIORef v_TopDir (drop 2 (last some)))
331 beginMake :: [String] -> IO ()
332 beginMake fileish_args
333 = do let (objs, mods) = partition objish_file fileish_args
334 mapM (add v_Ld_inputs) objs
337 [] -> throwDyn (UsageError "no input files")
338 [mod] -> do state <- cmInit Batch
339 cmLoadModule state mod
341 _ -> throwDyn (UsageError "only one module allowed with --make")
344 beginInteractive :: [String] -> IO ()
346 beginInteractive = throwDyn (CmdLineError "not built for interactive use")
348 beginInteractive fileish_args
349 = do minus_ls <- readIORef v_Cmdline_libraries
351 let (objs, mods) = partition objish_file fileish_args
352 libs = map Left objs ++ map Right minus_ls
354 state <- cmInit Interactive
356 [] -> interactiveUI state Nothing libs
357 [mod] -> interactiveUI state (Just mod) libs
358 _ -> throwDyn (UsageError
359 "only one module allowed with --interactive")