1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.48 2001/01/19 15:26:37 simonmar 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
35 import DriverPhases ( Phase(..), haskellish_file )
38 import Finder ( initFinder )
56 -----------------------------------------------------------------------------
59 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
60 -- dynamic flag whereas -package is a static flag.)
62 -----------------------------------------------------------------------------
66 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
67 -- 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
106 cleanTempFiles (verb >= 2)
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 -- process all the other arguments, and get the source files
167 non_static <- processArgs static_flags flags2 []
169 -- Find the build tag, and re-process the build-specific options.
170 -- Also add in flags for unregisterised compilation, if
171 -- GhcUnregisterised=YES.
172 way_opts <- findBuildTag
173 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
175 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
177 -- give the static flags to hsc
178 static_opts <- buildStaticHscOpts
179 writeIORef v_Static_hsc_opts static_opts
182 warn_level <- readIORef v_Warning_opt
184 let warn_opts = case warn_level of
185 W_default -> standardWarnings
187 W_all -> minusWallOpts
190 -- build the default DynFlags (these may be adjusted on a per
191 -- module basis by OPTIONS pragmas and settings in the interpreter).
193 core_todo <- buildCoreToDo
194 stg_todo <- buildStgToDo
196 -- set the "global" HscLang. The HscLang can be further adjusted on a module
197 -- by module basis, using only the -fvia-C and -fasm flags. If the global
198 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
199 opt_level <- readIORef v_OptLevel
200 let lang = case mode of
201 StopBefore HCc -> HscC
202 DoInteractive -> HscInterpreted
203 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
204 | otherwise -> defaultHscLang
206 writeIORef v_DynFlags
207 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 ++
221 non_static ++ warn_opts) []
222 -- save the "initial DynFlags" away
223 init_dyn_flags <- readIORef v_DynFlags
224 writeIORef v_InitDynFlags init_dyn_flags
226 -- complain about any unknown flags
227 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
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 -- initialise the finder
244 pkg_avails <- getPackageInfo
245 initFinder pkg_avails
247 -- mkdependHS is special
248 when (mode == DoMkDependHS) beginMkDependHS
250 -- make/interactive require invoking the compilation manager
251 if (mode == DoMake) then beginMake srcs else do
252 if (mode == DoInteractive) then beginInteractive srcs else do
255 o_file <- readIORef v_Output_file
256 ohi <- readIORef v_Output_hi
257 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink && mode /= DoMkDLL))
258 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
261 if null srcs then throwDyn (UsageError "no input files") else do
263 let compileFile src = do
264 writeIORef v_DynFlags init_dyn_flags
266 -- We compile in two stages, because the file may have an
267 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
269 let (basename, suffix) = splitFilename src
272 pp <- if not (haskellish_file src) || mode == StopBefore Hsc
273 then return src else do
274 phases <- genPipeline (StopBefore Hsc) stop_flag
275 False{-not persistent-} defaultHscLang src
276 pipeLoop phases src False{-no linking-} False{-no -o flag-}
279 -- rest of compilation
280 dyn_flags <- readIORef v_DynFlags
281 phases <- genPipeline mode stop_flag True (hscLang dyn_flags) pp
282 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
286 o_files <- mapM compileFile srcs
288 when (mode == DoMkDependHS) endMkDependHS
289 when (mode == DoLink) (doLink o_files)
290 when (mode == DoMkDLL) (doMkDLL o_files)
292 -- grab the last -B option on the command line, and
293 -- set topDir to its value.
294 setTopDir :: [String] -> IO [String]
296 let (minusbs, others) = partition (prefixMatch "-B") args
298 [] -> writeIORef v_TopDir clibdir
299 some -> writeIORef v_TopDir (drop 2 (last some)))
302 beginMake :: [String] -> IO ()
305 [] -> throwDyn (UsageError "no input files")
306 [mod] -> do state <- cmInit Batch
307 cmLoadModule state mod
309 _ -> throwDyn (UsageError "only one module allowed with --make")
312 beginInteractive :: [String] -> IO ()
314 beginInteractive = throwDyn (OtherError "not build for interactive use")
316 beginInteractive mods
317 = do state <- cmInit Interactive
318 let mod = case mods of
321 _ -> throwDyn (UsageError
322 "only one module allowed with --interactive")
323 interactiveUI state mod