1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.21 2000/11/14 16:28:38 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"
24 import DriverPhases ( Phase(..) )
25 import CmdLineOpts ( HscLang(..), DynFlags(..), v_Static_hsc_opts )
26 import Module ( mkModuleName )
28 import Finder ( initFinder )
35 #ifndef mingw32_TARGET_OS
50 -----------------------------------------------------------------------------
53 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
54 -- dynamic flag whereas -package is a static flag.)
56 -----------------------------------------------------------------------------
60 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
61 -- time commands when run with -v
66 -- Win32 support: proper signal handling
67 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
68 -- reading the package configuration file is too slow
69 -- -H, -K, -Rghc-timing
72 -----------------------------------------------------------------------------
73 -- Differences vs. old driver:
75 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
76 -- consistency checking removed (may do this properly later)
78 -- no hi diffs (could be added later)
81 -----------------------------------------------------------------------------
85 -- all error messages are propagated as exceptions
86 handleDyn (\dyn -> case dyn of
87 PhaseFailed _phase code -> exitWith code
88 Interrupted -> exitWith (ExitFailure 1)
89 _ -> do hPutStrLn stderr (show (dyn :: BarfKind))
90 exitWith (ExitFailure 1)
93 -- make sure we clean up after ourselves
94 later (do forget_it <- readIORef v_Keep_tmp_files
96 verb <- readIORef v_Verbose
99 -- exceptions will be blocked while we clean the temporary files,
100 -- so there shouldn't be any difficulty if we receive further
103 -- install signal handlers
104 main_thread <- myThreadId
105 #ifndef mingw32_TARGET_OS
106 let sig_handler = Catch (throwTo main_thread
107 (DynException (toDyn Interrupted)))
108 installHandler sigQUIT sig_handler Nothing
109 installHandler sigINT sig_handler Nothing
113 writeIORef v_Prog_name pgm
117 -- grab any -B options from the command line first
118 argv' <- setTopDir argv
119 top_dir <- readIORef v_TopDir
121 let installed s = top_dir ++ '/':s
122 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
124 installed_pkgconfig = installed ("package.conf")
125 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
127 -- discover whether we're running in a build tree or in an installation,
128 -- by looking for the package configuration file.
129 am_installed <- doesFileExist installed_pkgconfig
132 then writeIORef v_Path_package_config installed_pkgconfig
133 else do am_inplace <- doesFileExist inplace_pkgconfig
135 then writeIORef v_Path_package_config inplace_pkgconfig
136 else throwDyn (OtherError "can't find package.conf")
138 -- set the location of our various files
140 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
141 writeIORef v_Pgm_L (installed "unlit")
142 writeIORef v_Pgm_m (installed "ghc-asm")
143 writeIORef v_Pgm_s (installed "ghc-split")
145 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
146 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
147 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
148 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
150 -- read the package configuration
151 conf_file <- readIORef v_Path_package_config
152 contents <- readFile conf_file
153 let pkg_details = read contents -- ToDo: faster
154 writeIORef v_Package_details pkg_details
156 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
157 (flags2, mode, stop_flag) <- getGhcMode argv'
158 writeIORef v_GhcMode mode
160 -- process all the other arguments, and get the source files
161 non_static <- processArgs static_flags flags2 []
163 -- find the build tag, and re-process the build-specific options
164 more_opts <- findBuildTag
165 way_non_static <- processArgs static_flags more_opts []
167 -- give the static flags to hsc
168 static_opts <- buildStaticHscOpts
169 writeIORef v_Static_hsc_opts static_opts
172 warn_level <- readIORef v_Warning_opt
174 let warn_opts = case warn_level of
175 W_default -> standardWarnings
177 W_all -> minusWallOpts
180 -- build the default DynFlags (these may be adjusted on a per
181 -- module basis by OPTIONS pragmas and settings in the interpreter).
183 core_todo <- buildCoreToDo
184 stg_todo <- buildStgToDo
186 -- set the "global" HscLang. The HscLang can be further adjusted on a module
187 -- by module basis, using only the -fvia-C and -fasm flags. If the global
188 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
189 opt_level <- readIORef v_OptLevel
190 let lang = case mode of
191 StopBefore HCc -> HscC
192 DoInteractive -> HscInterpreted
193 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
194 | otherwise -> defaultHscLang
196 writeIORef v_DynFlags
197 DynFlags{ coreToDo = core_todo,
200 -- leave out hscOutName for now
203 -- the rest of the arguments are "dynamic"
204 srcs <- processArgs dynamic_flags (way_non_static ++
205 non_static ++ warn_opts) []
206 -- save the "initial DynFlags" away
207 init_dyn_flags <- readIORef v_DynFlags
208 writeIORef v_InitDynFlags init_dyn_flags
210 -- complain about any unknown flags
211 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
214 verb <- readIORef v_Verbose
216 when verb (do hPutStr stderr "Glasgow Haskell Compiler, Version "
217 hPutStr stderr cProjectVersion
218 hPutStr stderr ", for Haskell 98, compiled by GHC version "
219 hPutStrLn stderr cBooterVersion)
221 when verb (hPutStrLn stderr ("Using package config file: " ++ conf_file))
223 -- initialise the finder
224 initFinder pkg_details
226 -- mkdependHS is special
227 when (mode == DoMkDependHS) beginMkDependHS
229 -- make/interactive require invoking the compilation manager
230 if (mode == DoMake) then beginMake pkg_details srcs else do
231 if (mode == DoInteractive) then beginInteractive pkg_details srcs else do
233 -- for each source file, find which phases to run
234 let lang = hscLang init_dyn_flags
235 pipelines <- mapM (genPipeline mode stop_flag True lang) srcs
236 let src_pipelines = zip srcs pipelines
239 o_file <- readIORef v_Output_file
240 ohi <- readIORef v_Output_hi
241 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink))
242 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
245 if null srcs then throwDyn (UsageError "no input files") else do
247 -- save the flag state, because this could be modified by OPTIONS
248 -- pragmas during the compilation, and we'll need to restore it
249 -- before starting the next compilation.
250 saved_driver_state <- readIORef v_Driver_state
252 let compileFile (src, phases) = do
253 writeIORef v_Driver_state saved_driver_state
254 writeIORef v_DynFlags init_dyn_flags
255 r <- runPipeline phases src (mode==DoLink) True
258 o_files <- mapM compileFile src_pipelines
260 when (mode == DoMkDependHS) endMkDependHS
261 when (mode == DoLink) (doLink o_files)
263 -- grab the last -B option on the command line, and
264 -- set topDir to its value.
265 setTopDir :: [String] -> IO [String]
267 let (minusbs, others) = partition (prefixMatch "-B") args
269 [] -> writeIORef v_TopDir clibdir
270 some -> writeIORef v_TopDir (drop 2 (last some)))
273 beginMake :: PackageConfigInfo -> [String] -> IO ()
274 beginMake pkg_details mods
276 [] -> throwDyn (UsageError "no input files")
277 [mod] -> do state <- cmInit pkg_details
278 cmLoadModule state (mkModuleName mod)
280 _ -> throwDyn (UsageError "only one module allowed with --make")
282 beginInteractive pkg_details mods
285 [mod] -> do state <- cmInit pkg_details
286 cmLoadModule state (mkModuleName mod)
288 _ -> throwDyn (UsageError
289 "only one module allowed with --interactive")
292 interactiveUI :: IO ()
294 hPutStr stdout ghciWelcomeMsg
295 throwDyn (OtherError "GHCi not implemented yet")
298 \ _____ __ __ ____ ------------------------------------------------\n\
299 \(| || || (| |) GHCi: GHC Interactive, version 5.00 \n\
300 \|| __ ||___|| || () For Haskell 98. \n\
301 \|| |) ||---|| || // http://www.haskell.org/ghc \n\
302 \|| || || || || // Bug reports to: glasgow-haskell-bugs@haskell.org\n\
303 \(|___|| || || (|__|) (| ________________________________________________\n"