1 {-# OPTIONS -W -fno-warn-incomplete-patterns #-}
2 -----------------------------------------------------------------------------
3 -- $Id: Main.hs,v 1.14 2000/10/27 14:36:36 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 -----------------------------------------------------------------------------
58 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
59 -- time commands when run with -v
64 -- Win32 support: proper signal handling
65 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
66 -- reading the package configuration file is too slow
67 -- -H, -K, -Rghc-timing
70 -----------------------------------------------------------------------------
71 -- Differences vs. old driver:
73 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
74 -- consistency checking removed (may do this properly later)
76 -- no hi diffs (could be added later)
79 -----------------------------------------------------------------------------
83 -- all error messages are propagated as exceptions
84 handleDyn (\dyn -> case dyn of
85 PhaseFailed _phase code -> exitWith code
86 Interrupted -> exitWith (ExitFailure 1)
87 _ -> do hPutStrLn stderr (show (dyn :: BarfKind))
88 exitWith (ExitFailure 1)
91 -- make sure we clean up after ourselves
92 later (do forget_it <- readIORef v_Keep_tmp_files
94 verb <- readIORef v_Verbose
97 -- exceptions will be blocked while we clean the temporary files,
98 -- so there shouldn't be any difficulty if we receive further
101 -- install signal handlers
102 main_thread <- myThreadId
103 #ifndef mingw32_TARGET_OS
104 let sig_handler = Catch (throwTo main_thread
105 (DynException (toDyn Interrupted)))
106 installHandler sigQUIT sig_handler Nothing
107 installHandler sigINT sig_handler Nothing
111 writeIORef v_Prog_name pgm
115 -- grab any -B options from the command line first
116 argv' <- setTopDir argv
117 top_dir <- readIORef v_TopDir
119 let installed s = top_dir ++ '/':s
120 inplace s = top_dir ++ '/':cCURRENT_DIR ++ '/':s
122 installed_pkgconfig = installed ("package.conf")
123 inplace_pkgconfig = inplace (cGHC_DRIVER_DIR ++ "/package.conf.inplace")
125 -- discover whether we're running in a build tree or in an installation,
126 -- by looking for the package configuration file.
127 am_installed <- doesFileExist installed_pkgconfig
130 then writeIORef v_Path_package_config installed_pkgconfig
131 else do am_inplace <- doesFileExist inplace_pkgconfig
133 then writeIORef v_Path_package_config inplace_pkgconfig
134 else throwDyn (OtherError "can't find package.conf")
136 -- set the location of our various files
138 then do writeIORef v_Path_usage (installed "ghc-usage.txt")
139 writeIORef v_Pgm_L (installed "unlit")
140 writeIORef v_Pgm_m (installed "ghc-asm")
141 writeIORef v_Pgm_s (installed "ghc-split")
143 else do writeIORef v_Path_usage (inplace (cGHC_DRIVER_DIR ++ "/ghc-usage.txt"))
144 writeIORef v_Pgm_L (inplace cGHC_UNLIT)
145 writeIORef v_Pgm_m (inplace cGHC_MANGLER)
146 writeIORef v_Pgm_s (inplace cGHC_SPLIT)
148 -- read the package configuration
149 conf_file <- readIORef v_Path_package_config
150 contents <- readFile conf_file
151 let pkg_details = read contents -- ToDo: faster
152 writeIORef v_Package_details pkg_details
154 -- find the phase to stop after (i.e. -E, -C, -c, -S flags)
155 (flags2, mode, stop_flag) <- getGhcMode argv'
156 writeIORef v_GhcMode mode
158 -- force lang to "C" if the -C flag was given
159 case mode of StopBefore HCc -> writeIORef v_Hsc_Lang HscC
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 left_over <- processArgs static_flags more_opts []
168 if not (null left_over)
169 then throwDyn (OtherError "non-static flag in way-specific options")
172 -- give the static flags to hsc
173 static_opts <- buildStaticHscOpts
174 writeIORef v_Static_hsc_opts static_opts
177 warn_level <- readIORef v_Warning_opt
179 let warn_opts = case warn_level of
180 W_default -> standardWarnings
182 W_all -> minusWallOpts
185 -- build the default DynFlags (these may be adjusted on a per
186 -- module basis by OPTIONS pragmas and settings in the interpreter).
188 core_todo <- buildCoreToDo
189 stg_todo <- buildStgToDo
191 lang <- readIORef v_Hsc_Lang
192 writeIORef v_DynFlags
193 DynFlags{ coreToDo = core_todo,
196 -- leave out hscOutName for now
199 -- the rest of the arguments are "dynamic"
200 srcs <- processArgs dynamic_flags (non_static ++ warn_opts) []
201 -- save the "initial DynFlags" away
202 dyn_flags <- readIORef v_DynFlags
203 writeIORef v_InitDynFlags dyn_flags
205 -- complain about any unknown flags
206 mapM unknownFlagErr [ f | ('-':f) <- srcs ]
209 verb <- readIORef v_Verbose
211 when verb (do hPutStr stderr "Glasgow Haskell Compiler, Version "
212 hPutStr stderr version_str
213 hPutStr stderr ", for Haskell 98, compiled by GHC version "
214 hPutStrLn stderr booter_version)
216 when verb (hPutStrLn stderr ("Using package config file: " ++ conf_file))
218 -- initialise the finder
219 initFinder pkg_details
221 -- mkdependHS is special
222 when (mode == DoMkDependHS) beginMkDependHS
224 -- make/interactive require invoking the compilation manager
225 if (mode == DoMake) then beginMake srcs else do
226 if (mode == DoInteractive) then beginInteractive srcs else do
228 -- for each source file, find which phases to run
229 pipelines <- mapM (genPipeline mode stop_flag) srcs
230 let src_pipelines = zip srcs pipelines
232 o_file <- readIORef v_Output_file
233 if isJust o_file && mode /= DoLink && length srcs > 1
234 then throwDyn (UsageError "can't apply -o option to multiple source files")
237 if null srcs then throwDyn (UsageError "no input files") else do
239 -- save the flag state, because this could be modified by OPTIONS
240 -- pragmas during the compilation, and we'll need to restore it
241 -- before starting the next compilation.
242 saved_driver_state <- readIORef v_Driver_state
244 let compileFile (src, phases) = do
245 r <- runPipeline phases src (mode==DoLink) True
246 writeIORef v_Driver_state saved_driver_state
249 o_files <- mapM compileFile src_pipelines
251 when (mode == DoMkDependHS) endMkDependHS
252 when (mode == DoLink) (doLink o_files)
254 -- grab the last -B option on the command line, and
255 -- set topDir to its value.
256 setTopDir :: [String] -> IO [String]
258 let (minusbs, others) = partition (prefixMatch "-B") args
260 [] -> writeIORef v_TopDir clibdir
261 some -> writeIORef v_TopDir (drop 2 (last some)))
264 beginMake [] = throwDyn (UsageError "no input files")
265 beginMake (_:_:_) = throwDyn (UsageError "only one module allowed with --make")
268 state <- cmInit ""{-ToDo:remove-} pkg_details
269 cmLoadModule state (mkModuleName mod)
272 beginInteractive srcs = panic "`ghc --interactive' unimplemented"