1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.19 2000/11/10 14:29:21 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 )
27 import Finder ( initFinder )
34 #ifndef mingw32_TARGET_OS
49 -----------------------------------------------------------------------------
52 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
53 -- dynamic flag whereas -package is a static flag.)
55 -----------------------------------------------------------------------------
59 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
60 -- time commands when run with -v
65 -- Win32 support: proper signal handling
66 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
67 -- reading the package configuration file is too slow
68 -- -H, -K, -Rghc-timing
71 -----------------------------------------------------------------------------
72 -- Differences vs. old driver:
74 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
75 -- consistency checking removed (may do this properly later)
77 -- no hi diffs (could be added later)
80 -----------------------------------------------------------------------------
84 -- all error messages are propagated as exceptions
85 handleDyn (\dyn -> case dyn of
86 PhaseFailed _phase code -> exitWith code
87 Interrupted -> exitWith (ExitFailure 1)
88 _ -> do hPutStrLn stderr (show (dyn :: BarfKind))
89 exitWith (ExitFailure 1)
92 -- make sure we clean up after ourselves
93 later (do forget_it <- readIORef v_Keep_tmp_files
95 verb <- readIORef v_Verbose
98 -- exceptions will be blocked while we clean the temporary files,
99 -- so there shouldn't be any difficulty if we receive further
102 -- install signal handlers
103 main_thread <- myThreadId
104 #ifndef mingw32_TARGET_OS
105 let sig_handler = Catch (throwTo main_thread
106 (DynException (toDyn Interrupted)))
107 installHandler sigQUIT sig_handler Nothing
108 installHandler sigINT sig_handler Nothing
112 writeIORef v_Prog_name pgm
116 -- grab any -B options from the command line first
117 argv' <- setTopDir argv
118 top_dir <- readIORef v_TopDir
120 let installed s = top_dir ++ '/':s
121 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
123 installed_pkgconfig = installed ("package.conf")
124 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
126 -- discover whether we're running in a build tree or in an installation,
127 -- by looking for the package configuration file.
128 am_installed <- doesFileExist installed_pkgconfig
131 then writeIORef v_Path_package_config installed_pkgconfig
132 else do am_inplace <- doesFileExist inplace_pkgconfig
134 then writeIORef v_Path_package_config inplace_pkgconfig
135 else throwDyn (OtherError "can't find package.conf")
137 -- set the location of our various files
139 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
140 writeIORef v_Pgm_L (installed "unlit")
141 writeIORef v_Pgm_m (installed "ghc-asm")
142 writeIORef v_Pgm_s (installed "ghc-split")
144 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
145 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
146 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
147 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
149 -- read the package configuration
150 conf_file <- readIORef v_Path_package_config
151 contents <- readFile conf_file
152 let pkg_details = read contents -- ToDo: faster
153 writeIORef v_Package_details pkg_details
155 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
156 (flags2, mode, stop_flag) <- getGhcMode argv'
157 writeIORef v_GhcMode mode
159 -- force lang to "C" if the -C flag was given
160 case mode of StopBefore HCc -> writeIORef v_Hsc_Lang HscC
163 -- process all the other arguments, and get the source files
164 non_static <- processArgs static_flags flags2 []
166 -- find the build tag, and re-process the build-specific options
167 more_opts <- findBuildTag
168 way_non_static <- processArgs static_flags more_opts []
170 -- give the static flags to hsc
171 static_opts <- buildStaticHscOpts
172 writeIORef v_Static_hsc_opts static_opts
175 warn_level <- readIORef v_Warning_opt
177 let warn_opts = case warn_level of
178 W_default -> standardWarnings
180 W_all -> minusWallOpts
183 -- build the default DynFlags (these may be adjusted on a per
184 -- module basis by OPTIONS pragmas and settings in the interpreter).
186 core_todo <- buildCoreToDo
187 stg_todo <- buildStgToDo
189 lang <- readIORef v_Hsc_Lang
190 writeIORef v_DynFlags
191 DynFlags{ coreToDo = core_todo,
194 -- leave out hscOutName for now
197 -- the rest of the arguments are "dynamic"
198 srcs <- processArgs dynamic_flags (way_non_static ++
199 non_static ++ warn_opts) []
200 -- save the "initial DynFlags" away
201 init_dyn_flags <- readIORef v_DynFlags
202 writeIORef v_InitDynFlags init_dyn_flags
204 -- complain about any unknown flags
205 mapM unknownFlagErr [ f | f@('-':_) <- srcs ]
208 verb <- readIORef v_Verbose
210 when verb (do hPutStr stderr "Glasgow Haskell Compiler, Version "
211 hPutStr stderr cProjectVersion
212 hPutStr stderr ", for Haskell 98, compiled by GHC version "
213 hPutStrLn stderr cBooterVersion)
215 when verb (hPutStrLn stderr ("Using package config file: " ++ conf_file))
217 -- initialise the finder
218 initFinder pkg_details
220 -- mkdependHS is special
221 when (mode == DoMkDependHS) beginMkDependHS
223 -- make/interactive require invoking the compilation manager
224 if (mode == DoMake) then beginMake srcs else do
225 if (mode == DoInteractive) then beginInteractive srcs else do
227 -- for each source file, find which phases to run
228 pipelines <- mapM (genPipeline mode stop_flag) srcs
229 let src_pipelines = zip srcs pipelines
232 o_file <- readIORef v_Output_file
233 ohi <- readIORef v_Output_hi
234 if length srcs > 1 && (isJust ohi || (isJust o_file && mode /= DoLink))
235 then throwDyn (UsageError "can't apply -o or -ohi options to multiple source files")
238 if null srcs then throwDyn (UsageError "no input files") else do
240 -- save the flag state, because this could be modified by OPTIONS
241 -- pragmas during the compilation, and we'll need to restore it
242 -- before starting the next compilation.
243 saved_driver_state <- readIORef v_Driver_state
245 let compileFile (src, phases) = do
246 writeIORef v_Driver_state saved_driver_state
247 writeIORef v_DynFlags init_dyn_flags
248 r <- runPipeline phases src (mode==DoLink) True
251 o_files <- mapM compileFile src_pipelines
253 when (mode == DoMkDependHS) endMkDependHS
254 when (mode == DoLink) (doLink o_files)
256 -- grab the last -B option on the command line, and
257 -- set topDir to its value.
258 setTopDir :: [String] -> IO [String]
260 let (minusbs, others) = partition (prefixMatch "-B") args
262 [] -> writeIORef v_TopDir clibdir
263 some -> writeIORef v_TopDir (drop 2 (last some)))
266 beginMake [] = throwDyn (UsageError "no input files")
267 beginMake (_:_:_) = throwDyn (UsageError "only one module allowed with --make")
270 state <- cmInit ""{-ToDo:remove-} pkg_details
271 cmLoadModule state (mkModuleName mod)
274 beginInteractive srcs = panic "`ghc --interactive' unimplemented"