1 {-# OPTIONS -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.59 2001/03/06 11:23:46 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"
21 import Char ( toLower )
24 #ifndef mingw32_TARGET_OS
37 import DriverPhases ( Phase(..), haskellish_file, objish_file )
40 import Finder ( initFinder )
58 -----------------------------------------------------------------------------
61 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
62 -- dynamic flag whereas -package is a static flag.)
64 -----------------------------------------------------------------------------
68 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
69 -- time commands when run with -v
73 -- Win32 support: proper signal handling
74 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
75 -- reading the package configuration file is too slow
78 -----------------------------------------------------------------------------
79 -- Differences vs. old driver:
81 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
82 -- consistency checking removed (may do this properly later)
86 -----------------------------------------------------------------------------
90 -- top-level exception handler: any unrecognised exception is a compiler bug.
91 handle (\exception -> do hPutStr stderr (show (Panic (show exception)))
92 exitWith (ExitFailure 1)
95 -- all error messages are propagated as exceptions
96 handleDyn (\dyn -> case dyn of
97 PhaseFailed _phase code -> exitWith code
98 Interrupted -> exitWith (ExitFailure 1)
99 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
100 exitWith (ExitFailure 1)
103 -- make sure we clean up after ourselves
104 later (do forget_it <- readIORef v_Keep_tmp_files
105 unless forget_it $ do
106 verb <- dynFlag verbosity
109 -- exceptions will be blocked while we clean the temporary files,
110 -- so there shouldn't be any difficulty if we receive further
113 -- install signal handlers
114 main_thread <- myThreadId
115 #ifndef mingw32_TARGET_OS
116 let sig_handler = Catch (throwTo main_thread
117 (DynException (toDyn Interrupted)))
118 installHandler sigQUIT sig_handler Nothing
119 installHandler sigINT sig_handler Nothing
124 -- grab any -B options from the command line first
125 argv' <- setTopDir argv
126 top_dir <- readIORef v_TopDir
128 let installed s = top_dir ++ '/':s
129 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
131 installed_pkgconfig = installed ("package.conf")
132 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
134 -- discover whether we're running in a build tree or in an installation,
135 -- by looking for the package configuration file.
136 am_installed <- doesFileExist installed_pkgconfig
139 then writeIORef v_Path_package_config installed_pkgconfig
140 else do am_inplace <- doesFileExist inplace_pkgconfig
142 then writeIORef v_Path_package_config inplace_pkgconfig
143 else throwDyn (OtherError ("Can't find package.conf in " ++ inplace_pkgconfig))
145 -- set the location of our various files
147 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
148 writeIORef v_Pgm_L (installed "unlit")
149 writeIORef v_Pgm_m (installed "ghc-asm")
150 writeIORef v_Pgm_s (installed "ghc-split")
152 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
153 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
154 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
155 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
157 -- read the package configuration
158 conf_file <- readIORef v_Path_package_config
159 r <- parsePkgConf conf_file
161 Left err -> throwDyn (OtherError (showSDoc err));
162 Right pkg_details -> do
164 writeIORef v_Package_details pkg_details
166 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
167 (flags2, mode, stop_flag) <- getGhcMode argv'
168 writeIORef v_GhcMode mode
170 -- Show the GHCi banner?
172 when (mode == DoInteractive) $
173 hPutStrLn stdout ghciWelcomeMsg
176 -- process all the other arguments, and get the source files
177 non_static <- processArgs static_flags flags2 []
179 -- -O and --interactive are not a good combination
180 -- ditto with any kind of way selection
181 orig_opt_level <- readIORef v_OptLevel
182 when (orig_opt_level > 0 && mode == DoInteractive) $
183 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
184 writeIORef v_OptLevel 0
185 orig_ways <- readIORef v_Ways
186 when (not (null orig_ways) && mode == DoInteractive) $
187 do throwDyn (OtherError
188 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
190 -- Find the build tag, and re-process the build-specific options.
191 -- Also add in flags for unregisterised compilation, if
192 -- GhcUnregisterised=YES.
193 way_opts <- findBuildTag
194 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
196 way_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
198 -- give the static flags to hsc
199 static_opts <- buildStaticHscOpts
200 writeIORef v_Static_hsc_opts static_opts
202 -- build the default DynFlags (these may be adjusted on a per
203 -- module basis by OPTIONS pragmas and settings in the interpreter).
205 core_todo <- buildCoreToDo
206 stg_todo <- buildStgToDo
208 -- set the "global" HscLang. The HscLang can be further adjusted on a module
209 -- by module basis, using only the -fvia-C and -fasm flags. If the global
210 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
211 opt_level <- readIORef v_OptLevel
214 let lang = case mode of
215 StopBefore HCc -> HscC
216 DoInteractive -> HscInterpreted
217 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
218 | otherwise -> defaultHscLang
220 writeIORef v_DynFlags
221 defaultDynFlags{ coreToDo = core_todo,
224 -- leave out hscOutName for now
225 hscOutName = panic "Main.main:hscOutName not set",
227 verbosity = case mode of
233 -- the rest of the arguments are "dynamic"
234 srcs <- processArgs dynamic_flags (way_non_static ++ non_static) []
235 -- save the "initial DynFlags" away
236 init_dyn_flags <- readIORef v_DynFlags
237 writeIORef v_InitDynFlags init_dyn_flags
239 -- complain about any unknown flags
240 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
242 verb <- dynFlag verbosity
245 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
246 hPutStr stderr cProjectVersion
247 hPutStr stderr ", for Haskell 98, compiled by GHC version "
248 hPutStrLn stderr cBooterVersion)
251 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
254 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))
256 -- initialise the finder
257 pkg_avails <- getPackageInfo
258 initFinder pkg_avails
260 -- mkdependHS is special
261 when (mode == DoMkDependHS) beginMkDependHS
263 -- make/interactive require invoking the compilation manager
264 if (mode == DoMake) then beginMake srcs else do
265 if (mode == DoInteractive) then beginInteractive srcs else do
268 o_file <- readIORef v_Output_file
269 ohi <- readIORef v_Output_hi
270 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink && mode /= DoMkDLL))
271 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
274 if null srcs then throwDyn (UsageError "no input files") else do
276 let compileFile src = do
277 writeIORef v_DynFlags init_dyn_flags
279 -- We compile in two stages, because the file may have an
280 -- OPTIONS pragma that affects the compilation pipeline (eg. -fvia-C)
282 let (basename, suffix) = splitFilename src
285 pp <- if not (haskellish_file src) || mode == StopBefore Hsc
286 then return src else do
287 phases <- genPipeline (StopBefore Hsc) stop_flag
288 False{-not persistent-} defaultHscLang src
289 pipeLoop phases src False{-no linking-} False{-no -o flag-}
292 -- rest of compilation
293 dyn_flags <- readIORef v_DynFlags
294 phases <- genPipeline mode stop_flag True (hscLang dyn_flags) pp
295 r <- pipeLoop phases pp (mode==DoLink || mode==DoMkDLL) True{-use -o flag-}
299 o_files <- mapM compileFile srcs
301 when (mode == DoMkDependHS) endMkDependHS
302 when (mode == DoLink) (doLink o_files)
303 when (mode == DoMkDLL) (doMkDLL o_files)
305 -- grab the last -B option on the command line, and
306 -- set topDir to its value.
307 setTopDir :: [String] -> IO [String]
309 let (minusbs, others) = partition (prefixMatch "-B") args
311 [] -> writeIORef v_TopDir clibdir
312 some -> writeIORef v_TopDir (drop 2 (last some)))
315 beginMake :: [String] -> IO ()
316 beginMake fileish_args
317 = do let (objs, mods) = partition objish_file fileish_args
318 mapM (add v_Ld_inputs) objs
321 [] -> throwDyn (UsageError "no input files")
322 [mod] -> do state <- cmInit Batch
323 cmLoadModule state mod
325 _ -> throwDyn (UsageError "only one module allowed with --make")
328 beginInteractive :: [String] -> IO ()
330 beginInteractive = throwDyn (OtherError "not built for interactive use")
332 beginInteractive fileish_args
333 = do minus_ls <- readIORef v_Cmdline_libraries
335 let (objs, mods) = partition objish_file fileish_args
336 libs = map Left objs ++ map Right minus_ls
338 state <- cmInit Interactive
340 [] -> interactiveUI state Nothing libs
341 [mod] -> interactiveUI state (Just mod) libs
342 _ -> throwDyn (UsageError
343 "only one module allowed with --interactive")