1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.29 2000/11/21 14:35:52 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"
29 import DriverPhases ( Phase(..) )
30 import CmdLineOpts ( HscLang(..), DynFlags(..), v_Static_hsc_opts )
31 import Module ( mkModuleName )
33 import Finder ( initFinder )
39 #ifndef mingw32_TARGET_OS
54 -----------------------------------------------------------------------------
57 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
58 -- dynamic flag whereas -package is a static flag.)
60 -----------------------------------------------------------------------------
64 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
65 -- time commands when run with -v
70 -- Win32 support: proper signal handling
71 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
72 -- reading the package configuration file is too slow
73 -- -H, -K, -Rghc-timing
75 -- -ddump-all doesn't do anything
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)
83 -- no hi diffs (could be added later)
86 -----------------------------------------------------------------------------
90 -- all error messages are propagated as exceptions
91 handleDyn (\dyn -> case dyn of
92 PhaseFailed _phase code -> exitWith code
93 Interrupted -> exitWith (ExitFailure 1)
94 _ -> do hPutStrLn stderr (show (dyn :: BarfKind))
95 exitWith (ExitFailure 1)
98 -- make sure we clean up after ourselves
99 later (do forget_it <- readIORef v_Keep_tmp_files
100 unless forget_it $ do
101 verb <- dynFlag verbosity
102 cleanTempFiles (verb >= 2)
104 -- exceptions will be blocked while we clean the temporary files,
105 -- so there shouldn't be any difficulty if we receive further
108 -- install signal handlers
109 main_thread <- myThreadId
110 #ifndef mingw32_TARGET_OS
111 let sig_handler = Catch (throwTo main_thread
112 (DynException (toDyn Interrupted)))
113 installHandler sigQUIT sig_handler Nothing
114 installHandler sigINT sig_handler Nothing
119 -- grab any -B options from the command line first
120 argv' <- setTopDir argv
121 top_dir <- readIORef v_TopDir
123 let installed s = top_dir ++ '/':s
124 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
126 installed_pkgconfig = installed ("package.conf")
127 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
129 -- discover whether we're running in a build tree or in an installation,
130 -- by looking for the package configuration file.
131 am_installed <- doesFileExist installed_pkgconfig
134 then writeIORef v_Path_package_config installed_pkgconfig
135 else do am_inplace <- doesFileExist inplace_pkgconfig
137 then writeIORef v_Path_package_config inplace_pkgconfig
138 else throwDyn (OtherError "can't find package.conf")
140 -- set the location of our various files
142 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
143 writeIORef v_Pgm_L (installed "unlit")
144 writeIORef v_Pgm_m (installed "ghc-asm")
145 writeIORef v_Pgm_s (installed "ghc-split")
147 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
148 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
149 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
150 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
152 -- read the package configuration
153 conf_file <- readIORef v_Path_package_config
154 contents <- readFile conf_file
155 let pkg_details = read contents -- ToDo: faster
156 writeIORef v_Package_details pkg_details
158 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
159 (flags2, mode, stop_flag) <- getGhcMode argv'
160 writeIORef v_GhcMode mode
162 -- process all the other arguments, and get the source files
163 non_static <- processArgs static_flags flags2 []
165 -- find the build tag, and re-process the build-specific options
166 more_opts <- findBuildTag
167 way_non_static <- processArgs static_flags more_opts []
169 -- give the static flags to hsc
170 static_opts <- buildStaticHscOpts
171 writeIORef v_Static_hsc_opts static_opts
174 warn_level <- readIORef v_Warning_opt
176 let warn_opts = case warn_level of
177 W_default -> standardWarnings
179 W_all -> minusWallOpts
182 -- build the default DynFlags (these may be adjusted on a per
183 -- module basis by OPTIONS pragmas and settings in the interpreter).
185 core_todo <- buildCoreToDo
186 stg_todo <- buildStgToDo
188 -- set the "global" HscLang. The HscLang can be further adjusted on a module
189 -- by module basis, using only the -fvia-C and -fasm flags. If the global
190 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
191 opt_level <- readIORef v_OptLevel
192 let lang = case mode of
193 StopBefore HCc -> HscC
194 DoInteractive -> HscInterpreted
195 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
196 | otherwise -> defaultHscLang
198 writeIORef v_DynFlags
199 DynFlags{ coreToDo = core_todo,
202 -- leave out hscOutName for now
203 hscOutName = panic "Main.main:hscOutName not set",
205 verbosity = case mode of
212 -- the rest of the arguments are "dynamic"
213 srcs <- processArgs dynamic_flags (way_non_static ++
214 non_static ++ warn_opts) []
215 -- save the "initial DynFlags" away
216 init_dyn_flags <- readIORef v_DynFlags
217 writeIORef v_InitDynFlags init_dyn_flags
219 -- complain about any unknown flags
220 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
222 -- save the flag state, because this could be modified by OPTIONS
223 -- pragmas during the compilation, and we'll need to restore it
224 -- before starting the next compilation.
225 saved_driver_state <- readIORef v_Driver_state
226 writeIORef v_InitDriverState saved_driver_state
228 verb <- dynFlag verbosity
231 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
232 hPutStr stderr cProjectVersion
233 hPutStr stderr ", for Haskell 98, compiled by GHC version "
234 hPutStrLn stderr cBooterVersion)
237 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
239 -- initialise the finder
240 initFinder pkg_details
242 -- mkdependHS is special
243 when (mode == DoMkDependHS) beginMkDependHS
245 -- make/interactive require invoking the compilation manager
246 if (mode == DoMake) then beginMake pkg_details srcs else do
247 if (mode == DoInteractive) then beginInteractive pkg_details srcs else do
249 -- for each source file, find which phases to run
250 let lang = hscLang init_dyn_flags
251 pipelines <- mapM (genPipeline mode stop_flag True lang) srcs
252 let src_pipelines = zip srcs pipelines
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))
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, phases) = do
264 writeIORef v_Driver_state saved_driver_state
265 writeIORef v_DynFlags init_dyn_flags
266 r <- runPipeline phases src (mode==DoLink) True
269 o_files <- mapM compileFile src_pipelines
271 when (mode == DoMkDependHS) endMkDependHS
272 when (mode == DoLink) (doLink o_files)
274 -- grab the last -B option on the command line, and
275 -- set topDir to its value.
276 setTopDir :: [String] -> IO [String]
278 let (minusbs, others) = partition (prefixMatch "-B") args
280 [] -> writeIORef v_TopDir clibdir
281 some -> writeIORef v_TopDir (drop 2 (last some)))
284 beginMake :: PackageConfigInfo -> [String] -> IO ()
285 beginMake pkg_details mods
287 [] -> throwDyn (UsageError "no input files")
288 [mod] -> do state <- cmInit pkg_details Batch
289 cmLoadModule state mod
291 _ -> throwDyn (UsageError "only one module allowed with --make")
294 beginInteractive = throwDyn (OtherError "not build for interactive use")
296 beginInteractive pkg_details mods
297 = do state <- cmInit pkg_details Interactive
300 [mod] -> do cmLoadModule state mod; return ()
301 _ -> throwDyn (UsageError
302 "only one module allowed with --interactive")