1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.10 2000/10/26 16:21:02 sewardj 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"
23 import DriverPhases ( Phase(..) )
24 import CmdLineOpts ( HscLang(..), DynFlags(..) )
31 #ifndef mingw32_TARGET_OS
45 -----------------------------------------------------------------------------
48 -- * -fglasgow-exts NO LONGER IMPLIES -package lang!!! (-fglasgow-exts is a
49 -- dynamic flag whereas -package is a static flag.)
51 -----------------------------------------------------------------------------
54 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
55 -- time commands when run with -v
60 -- Win32 support: proper signal handling
61 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
62 -- reading the package configuration file is too slow
63 -- -H, -K, -Rghc-timing
66 -----------------------------------------------------------------------------
67 -- Differences vs. old driver:
69 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
70 -- consistency checking removed (may do this properly later)
72 -- no hi diffs (could be added later)
75 -----------------------------------------------------------------------------
79 -- all error messages are propagated as exceptions
80 handleDyn (\dyn -> case dyn of
81 PhaseFailed _phase code -> exitWith code
82 Interrupted -> exitWith (ExitFailure 1)
83 _ -> do hPutStrLn stderr (show (dyn :: BarfKind))
84 exitWith (ExitFailure 1)
87 -- make sure we clean up after ourselves
88 later (do forget_it <- readIORef v_Keep_tmp_files
90 verb <- readIORef v_Verbose
93 -- exceptions will be blocked while we clean the temporary files,
94 -- so there shouldn't be any difficulty if we receive further
97 -- install signal handlers
98 main_thread <- myThreadId
99 #ifndef mingw32_TARGET_OS
100 let sig_handler = Catch (throwTo main_thread
101 (DynException (toDyn Interrupted)))
102 installHandler sigQUIT sig_handler Nothing
103 installHandler sigINT sig_handler Nothing
107 writeIORef v_Prog_name pgm
111 -- grab any -B options from the command line first
112 argv' <- setTopDir argv
113 top_dir <- readIORef v_TopDir
115 let installed s = top_dir ++ s
116 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
118 installed_pkgconfig = installed ("package.conf")
119 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
121 -- discover whether we're running in a build tree or in an installation,
122 -- by looking for the package configuration file.
123 am_installed <- doesFileExist installed_pkgconfig
126 then writeIORef v_Path_package_config installed_pkgconfig
127 else do am_inplace <- doesFileExist inplace_pkgconfig
129 then writeIORef v_Path_package_config inplace_pkgconfig
130 else throwDyn (OtherError "can't find package.conf")
132 -- set the location of our various files
134 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
135 writeIORef v_Pgm_L (installed "unlit")
136 writeIORef v_Pgm_m (installed "ghc-asm")
137 writeIORef v_Pgm_s (installed "ghc-split")
139 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
140 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
141 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
142 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
144 -- read the package configuration
145 conf_file <- readIORef v_Path_package_config
146 contents <- readFile conf_file
147 writeIORef v_Package_details (read contents)
149 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
150 (flags2, mode, stop_flag) <- getGhcMode argv'
151 writeIORef v_GhcMode mode
153 -- force lang to "C" if the -C flag was given
154 case mode of StopBefore HCc -> writeIORef v_Hsc_Lang HscC
157 -- process all the other arguments, and get the source files
158 non_static <- processArgs static_flags flags2 []
160 -- find the build tag, and re-process the build-specific options
161 more_opts <- findBuildTag
162 _ <- processArgs static_flags more_opts []
164 -- give the static flags to hsc
165 static_opts <- buildStaticHscOpts
166 writeIORef v_Static_hsc_opts static_opts
169 warn_level <- readIORef v_Warning_opt
171 let warn_opts = case warn_level of
172 W_default -> standardWarnings
174 W_all -> minusWallOpts
177 -- build the default DynFlags (these may be adjusted on a per
178 -- module basis by OPTIONS pragmas and settings in the interpreter).
180 core_todo <- buildCoreToDo
181 stg_todo <- buildStgToDo
183 lang <- readIORef v_Hsc_Lang
184 writeIORef v_DynFlags
185 DynFlags{ coreToDo = core_todo,
188 -- leave out hscOutName for now
191 -- the rest of the arguments are "dynamic"
192 srcs <- processArgs dynamic_flags non_static []
193 -- save the "initial DynFlags" away
194 dyn_flags <- readIORef v_DynFlags
195 writeIORef v_InitDynFlags dyn_flags
197 -- complain about any unknown flags
198 let unknown_flags = [ f | ('-':f) <- srcs ]
199 mapM unknownFlagErr unknown_flags
202 verb <- readIORef v_Verbose
204 when verb (do hPutStr stderr "Glasgow Haskell Compiler, Version "
205 hPutStr stderr version_str
206 hPutStr stderr ", for Haskell 98, compiled by GHC version "
207 hPutStrLn stderr booter_version)
209 when verb (hPutStrLn stderr ("Using package config file: " ++ conf_file))
211 -- mkdependHS is special
212 when (mode == DoMkDependHS) beginMkDependHS
215 when (mode == DoMake) beginMake
217 -- for each source file, find which phases to run
218 pipelines <- mapM (genPipeline mode stop_flag) srcs
219 let src_pipelines = zip srcs pipelines
221 o_file <- readIORef v_Output_file
222 if isJust o_file && mode /= DoLink && length srcs > 1
223 then throwDyn (UsageError "can't apply -o option to multiple source files")
226 if null srcs then throwDyn (UsageError "no input files") else do
228 -- save the flag state, because this could be modified by OPTIONS pragmas
229 -- during the compilation, and we'll need to restore it before starting
230 -- the next compilation.
231 saved_driver_state <- readIORef v_Driver_state
233 let compileFile (src, phases) = do
234 r <- runPipeline phases src (mode==DoLink) True
235 writeIORef v_Driver_state saved_driver_state
238 o_files <- mapM compileFile src_pipelines
240 when (mode == DoMkDependHS) endMkDependHS
241 when (mode == DoLink) (doLink o_files)
243 -- grab the last -B option on the command line, and
244 -- set topDir to its value.
245 setTopDir :: [String] -> IO [String]
247 let (minusbs, others) = partition (prefixMatch "-B") args
249 [] -> writeIORef v_TopDir clibdir
250 some -> writeIORef v_TopDir (drop 2 (last some)))
253 beginMake = panic "`ghc --make' unimplemented"
255 -----------------------------------------------------------------------------
256 -- compatibility code
258 #if __GLASGOW_HASKELL__ <= 408
260 ioErrors = justIoErrors
261 throwTo = raiseInThread
264 #ifdef mingw32_TARGET_OS
265 foreign import "_getpid" getProcessID :: IO Int