1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.23 2000/11/16 11:39:37 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"
26 import DriverPhases ( Phase(..) )
27 import CmdLineOpts ( HscLang(..), DynFlags(..), v_Static_hsc_opts )
28 import Module ( mkModuleName )
30 import Finder ( initFinder )
36 #ifndef mingw32_TARGET_OS
51 -----------------------------------------------------------------------------
54 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
55 -- dynamic flag whereas -package is a static flag.)
57 -----------------------------------------------------------------------------
61 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
62 -- time commands when run with -v
67 -- Win32 support: proper signal handling
68 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
69 -- reading the package configuration file is too slow
70 -- -H, -K, -Rghc-timing
73 -----------------------------------------------------------------------------
74 -- Differences vs. old driver:
76 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
77 -- consistency checking removed (may do this properly later)
79 -- no hi diffs (could be added later)
82 -----------------------------------------------------------------------------
86 -- all error messages are propagated as exceptions
87 handleDyn (\dyn -> case dyn of
88 PhaseFailed _phase code -> exitWith code
89 Interrupted -> exitWith (ExitFailure 1)
90 _ -> do hPutStrLn stderr (show (dyn :: BarfKind))
91 exitWith (ExitFailure 1)
94 -- make sure we clean up after ourselves
95 later (do forget_it <- readIORef v_Keep_tmp_files
97 verb <- readIORef v_Verbose
100 -- exceptions will be blocked while we clean the temporary files,
101 -- so there shouldn't be any difficulty if we receive further
104 -- install signal handlers
105 main_thread <- myThreadId
106 #ifndef mingw32_TARGET_OS
107 let sig_handler = Catch (throwTo main_thread
108 (DynException (toDyn Interrupted)))
109 installHandler sigQUIT sig_handler Nothing
110 installHandler sigINT sig_handler Nothing
114 writeIORef v_Prog_name pgm
118 -- grab any -B options from the command line first
119 argv' <- setTopDir argv
120 top_dir <- readIORef v_TopDir
122 let installed s = top_dir ++ '/':s
123 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
125 installed_pkgconfig = installed ("package.conf")
126 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
128 -- discover whether we're running in a build tree or in an installation,
129 -- by looking for the package configuration file.
130 am_installed <- doesFileExist installed_pkgconfig
133 then writeIORef v_Path_package_config installed_pkgconfig
134 else do am_inplace <- doesFileExist inplace_pkgconfig
136 then writeIORef v_Path_package_config inplace_pkgconfig
137 else throwDyn (OtherError "can't find package.conf")
139 -- set the location of our various files
141 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
142 writeIORef v_Pgm_L (installed "unlit")
143 writeIORef v_Pgm_m (installed "ghc-asm")
144 writeIORef v_Pgm_s (installed "ghc-split")
146 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
147 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
148 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
149 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
151 -- read the package configuration
152 conf_file <- readIORef v_Path_package_config
153 contents <- readFile conf_file
154 let pkg_details = read contents -- ToDo: faster
155 writeIORef v_Package_details pkg_details
157 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
158 (flags2, mode, stop_flag) <- getGhcMode argv'
159 writeIORef v_GhcMode mode
161 -- process all the other arguments, and get the source files
162 non_static <- processArgs static_flags flags2 []
164 -- find the build tag, and re-process the build-specific options
165 more_opts <- findBuildTag
166 way_non_static <- processArgs static_flags more_opts []
168 -- give the static flags to hsc
169 static_opts <- buildStaticHscOpts
170 writeIORef v_Static_hsc_opts static_opts
173 warn_level <- readIORef v_Warning_opt
175 let warn_opts = case warn_level of
176 W_default -> standardWarnings
178 W_all -> minusWallOpts
181 -- build the default DynFlags (these may be adjusted on a per
182 -- module basis by OPTIONS pragmas and settings in the interpreter).
184 core_todo <- buildCoreToDo
185 stg_todo <- buildStgToDo
187 -- set the "global" HscLang. The HscLang can be further adjusted on a module
188 -- by module basis, using only the -fvia-C and -fasm flags. If the global
189 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
190 opt_level <- readIORef v_OptLevel
191 let lang = case mode of
192 StopBefore HCc -> HscC
193 DoInteractive -> HscInterpreted
194 _other | opt_level >= 1 -> HscC -- -O implies -fvia-C
195 | otherwise -> defaultHscLang
197 writeIORef v_DynFlags
198 DynFlags{ coreToDo = core_todo,
201 -- leave out hscOutName for now
202 hscOutName = panic "Main.main:hscOutName not set",
205 -- the rest of the arguments are "dynamic"
206 srcs <- processArgs dynamic_flags (way_non_static ++
207 non_static ++ warn_opts) []
208 -- save the "initial DynFlags" away
209 init_dyn_flags <- readIORef v_DynFlags
210 writeIORef v_InitDynFlags init_dyn_flags
212 -- complain about any unknown flags
213 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
216 verb <- readIORef v_Verbose
218 when verb (do hPutStr stderr "Glasgow Haskell Compiler, Version "
219 hPutStr stderr cProjectVersion
220 hPutStr stderr ", for Haskell 98, compiled by GHC version "
221 hPutStrLn stderr cBooterVersion)
223 when verb (hPutStrLn stderr ("Using package config file: " ++ conf_file))
225 -- initialise the finder
226 initFinder pkg_details
228 -- mkdependHS is special
229 when (mode == DoMkDependHS) beginMkDependHS
231 -- make/interactive require invoking the compilation manager
232 if (mode == DoMake) then beginMake pkg_details srcs else do
233 if (mode == DoInteractive) then beginInteractive pkg_details srcs else do
235 -- for each source file, find which phases to run
236 let lang = hscLang init_dyn_flags
237 pipelines <- mapM (genPipeline mode stop_flag True lang) srcs
238 let src_pipelines = zip srcs pipelines
241 o_file <- readIORef v_Output_file
242 ohi <- readIORef v_Output_hi
243 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink))
244 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
247 if null srcs then throwDyn (UsageError "no input files") else do
249 -- save the flag state, because this could be modified by OPTIONS
250 -- pragmas during the compilation, and we'll need to restore it
251 -- before starting the next compilation.
252 saved_driver_state <- readIORef v_Driver_state
254 let compileFile (src, phases) = do
255 writeIORef v_Driver_state saved_driver_state
256 writeIORef v_DynFlags init_dyn_flags
257 r <- runPipeline phases src (mode==DoLink) True
260 o_files <- mapM compileFile src_pipelines
262 when (mode == DoMkDependHS) endMkDependHS
263 when (mode == DoLink) (doLink o_files)
265 -- grab the last -B option on the command line, and
266 -- set topDir to its value.
267 setTopDir :: [String] -> IO [String]
269 let (minusbs, others) = partition (prefixMatch "-B") args
271 [] -> writeIORef v_TopDir clibdir
272 some -> writeIORef v_TopDir (drop 2 (last some)))
275 beginMake :: PackageConfigInfo -> [String] -> IO ()
276 beginMake pkg_details mods
278 [] -> throwDyn (UsageError "no input files")
279 [mod] -> do state <- cmInit pkg_details Batch
280 cmLoadModule state (mkModuleName mod)
282 _ -> throwDyn (UsageError "only one module allowed with --make")
284 beginInteractive pkg_details mods
285 = do state <- cmInit pkg_details Interactive
288 [mod] -> do cmLoadModule state (mkModuleName mod); return ()
289 _ -> throwDyn (UsageError
290 "only one module allowed with --interactive")