1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.34 2000/11/24 17:02:02 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"
24 #ifndef mingw32_TARGET_OS
36 import DriverPhases ( Phase(..) )
37 import CmdLineOpts ( HscLang(..), DynFlags(..), v_Static_hsc_opts )
39 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
74 -- Win32 support: proper signal handling
75 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
76 -- reading the package configuration file is too slow
77 -- -H, -K, -Rghc-timing
79 -- -ddump-all doesn't do anything
81 -----------------------------------------------------------------------------
82 -- Differences vs. old driver:
84 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
85 -- consistency checking removed (may do this properly later)
87 -- no hi diffs (could be added later)
90 -----------------------------------------------------------------------------
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 :: BarfKind))
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 more_opts <- findBuildTag
171 way_non_static <- processArgs static_flags more_opts []
173 -- give the static flags to hsc
174 static_opts <- buildStaticHscOpts
175 writeIORef v_Static_hsc_opts static_opts
178 warn_level <- readIORef v_Warning_opt
180 let warn_opts = case warn_level of
181 W_default -> standardWarnings
183 W_all -> minusWallOpts
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
196 let lang = case mode of
197 StopBefore HCc -> HscC
198 DoInteractive -> HscInterpreted
199 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
200 | otherwise -> defaultHscLang
202 writeIORef v_DynFlags
203 DynFlags{ coreToDo = core_todo,
206 -- leave out hscOutName for now
207 hscOutName = panic "Main.main:hscOutName not set",
209 verbosity = case mode of
216 -- the rest of the arguments are "dynamic"
217 srcs <- processArgs dynamic_flags (way_non_static ++
218 non_static ++ warn_opts) []
219 -- save the "initial DynFlags" away
220 init_dyn_flags <- readIORef v_DynFlags
221 writeIORef v_InitDynFlags init_dyn_flags
223 -- complain about any unknown flags
224 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
226 -- save the flag state, because this could be modified by OPTIONS
227 -- pragmas during the compilation, and we'll need to restore it
228 -- before starting the next compilation.
229 saved_driver_state <- readIORef v_Driver_state
230 writeIORef v_InitDriverState saved_driver_state
232 verb <- dynFlag verbosity
235 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
236 hPutStr stderr cProjectVersion
237 hPutStr stderr ", for Haskell 98, compiled by GHC version "
238 hPutStrLn stderr cBooterVersion)
241 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
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
254 -- for each source file, find which phases to run
255 let lang = hscLang init_dyn_flags
256 pipelines <- mapM (genPipeline mode stop_flag True lang) srcs
257 let src_pipelines = zip srcs pipelines
260 o_file <- readIORef v_Output_file
261 ohi <- readIORef v_Output_hi
262 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink))
263 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
266 if null srcs then throwDyn (UsageError "no input files") else do
268 let compileFile (src, phases) = do
269 writeIORef v_Driver_state saved_driver_state
270 writeIORef v_DynFlags init_dyn_flags
271 r <- runPipeline phases src (mode==DoLink) True
274 o_files <- mapM compileFile src_pipelines
276 when (mode == DoMkDependHS) endMkDependHS
277 when (mode == DoLink) (doLink o_files)
279 -- grab the last -B option on the command line, and
280 -- set topDir to its value.
281 setTopDir :: [String] -> IO [String]
283 let (minusbs, others) = partition (prefixMatch "-B") args
285 [] -> writeIORef v_TopDir clibdir
286 some -> writeIORef v_TopDir (drop 2 (last some)))
289 beginMake :: [String] -> IO ()
292 [] -> throwDyn (UsageError "no input files")
293 [mod] -> do state <- cmInit Batch
294 cmLoadModule state mod
296 _ -> throwDyn (UsageError "only one module allowed with --make")
299 beginInteractive :: [String] -> IO ()
301 beginInteractive = throwDyn (OtherError "not build for interactive use")
303 beginInteractive mods
304 = do state <- cmInit Interactive
307 [] -> return (state, True, [])
308 [mod] -> cmLoadModule state mod
309 _ -> throwDyn (UsageError
310 "only one module allowed with --interactive")
311 interactiveUI state' ms