1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.57 2001/02/28 11:44:39 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"
21 import Char ( toLower )
24 #ifndef mingw32_TARGET_OS
36 import DriverPhases ( Phase(..), haskellish_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 (OtherError "can't find package.conf")
144 -- set the location of our various files
146 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
147 writeIORef v_Pgm_L (installed "unlit")
148 writeIORef v_Pgm_m (installed "ghc-asm")
149 writeIORef v_Pgm_s (installed "ghc-split")
151 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
152 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
153 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
154 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
156 -- read the package configuration
157 conf_file <- readIORef v_Path_package_config
158 contents <- readFile conf_file
159 let pkg_details = read contents -- ToDo: faster
160 writeIORef v_Package_details pkg_details
162 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
163 (flags2, mode, stop_flag) <- getGhcMode argv'
164 writeIORef v_GhcMode mode
166 -- Show the GHCi banner?
168 when (mode == DoInteractive) $
169 hPutStrLn stdout ghciWelcomeMsg
172 -- process all the other arguments, and get the source files
173 non_static <- processArgs static_flags flags2 []
175 -- -O and --interactive are not a good combination
176 -- ditto with any kind of way selection
177 orig_opt_level <- readIORef v_OptLevel
178 when (orig_opt_level > 0 && mode == DoInteractive) $
179 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
180 writeIORef v_OptLevel 0
181 orig_ways <- readIORef v_Ways
182 when (not (null orig_ways) && mode == DoInteractive) $
183 do throwDyn (OtherError
184 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
186 -- Find the build tag, and re-process the build-specific options.
187 -- Also add in flags for unregisterised compilation, if
188 -- GhcUnregisterised=YES.
189 way_opts <- findBuildTag
190 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
192 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
194 -- give the static flags to hsc
195 static_opts <- buildStaticHscOpts
196 writeIORef v_Static_hsc_opts static_opts
198 -- build the default DynFlags (these may be adjusted on a per
199 -- module basis by OPTIONS pragmas and settings in the interpreter).
201 core_todo <- buildCoreToDo
202 stg_todo <- buildStgToDo
204 -- set the "global" HscLang. The HscLang can be further adjusted on a module
205 -- by module basis, using only the -fvia-C and -fasm flags. If the global
206 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
207 opt_level <- readIORef v_OptLevel
210 let lang = case mode of
211 StopBefore HCc -> HscC
212 DoInteractive -> HscInterpreted
213 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
214 | otherwise -> defaultHscLang
216 writeIORef v_DynFlags
217 defaultDynFlags{ coreToDo = core_todo,
220 -- leave out hscOutName for now
221 hscOutName = panic "Main.main:hscOutName not set",
223 verbosity = case mode of
229 -- the rest of the arguments are "dynamic"
230 srcs <- processArgs dynamic_flags (way_non_static ++ non_static) []
231 -- save the "initial DynFlags" away
232 init_dyn_flags <- readIORef v_DynFlags
233 writeIORef v_InitDynFlags init_dyn_flags
235 -- complain about any unknown flags
236 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
238 verb <- dynFlag verbosity
241 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
242 hPutStr stderr cProjectVersion
243 hPutStr stderr ", for Haskell 98, compiled by GHC version "
244 hPutStrLn stderr cBooterVersion)
247 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
250 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
252 -- initialise the finder
253 pkg_avails <- getPackageInfo
254 initFinder pkg_avails
256 -- mkdependHS is special
257 when (mode == DoMkDependHS) beginMkDependHS
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
264 o_file <- readIORef v_Output_file
265 ohi <- readIORef v_Output_hi
266 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink && mode /= DoMkDLL))
267 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
270 if null srcs then throwDyn (UsageError "no input files") else do
272 let compileFile src = do
273 writeIORef v_DynFlags init_dyn_flags
275 -- We compile in two stages, because the file may have an
276 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
278 let (basename, suffix) = splitFilename src
281 pp <- if not (haskellish_file src) || mode == StopBefore Hsc
282 then return src else do
283 phases <- genPipeline (StopBefore Hsc) stop_flag
284 False{-not persistent-} defaultHscLang src
285 pipeLoop phases src False{-no linking-} False{-no -o flag-}
288 -- rest of compilation
289 dyn_flags <- readIORef v_DynFlags
290 phases <- genPipeline mode stop_flag True (hscLang dyn_flags) pp
291 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
295 o_files <- mapM compileFile srcs
297 when (mode == DoMkDependHS) endMkDependHS
298 when (mode == DoLink) (doLink o_files)
299 when (mode == DoMkDLL) (doMkDLL o_files)
301 -- grab the last -B option on the command line, and
302 -- set topDir to its value.
303 setTopDir :: [String] -> IO [String]
305 let (minusbs, others) = partition (prefixMatch "-B") args
307 [] -> writeIORef v_TopDir clibdir
308 some -> writeIORef v_TopDir (drop 2 (last some)))
311 beginMake :: [String] -> IO ()
312 beginMake fileish_args
313 = do let (objs, mods) = partition objish_file fileish_args
314 mapM (add v_Ld_inputs) objs
317 [] -> throwDyn (UsageError "no input files")
318 [mod] -> do state <- cmInit Batch
319 cmLoadModule state mod
321 _ -> throwDyn (UsageError "only one module allowed with --make")
324 beginInteractive :: [String] -> IO ()
326 beginInteractive = throwDyn (OtherError "not built for interactive use")
328 beginInteractive fileish_args
329 = do minus_ls <- readIORef v_Cmdline_libraries
331 let (objs, mods) = partition objish_file fileish_args
332 libs = map Left objs ++ map Right minus_ls
334 state <- cmInit Interactive
336 [] -> interactiveUI state Nothing libs
337 [mod] -> interactiveUI state (Just mod) libs
338 _ -> throwDyn (UsageError
339 "only one module allowed with --interactive")