1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.124 2003/06/04 15:47:59 simonmar Exp $
8 -- (c) The University of Glasgow 2002
10 -----------------------------------------------------------------------------
12 -- with path so that ghc -M can find config.h
13 #include "../includes/config.h"
15 module Main (main) where
17 #include "HsVersions.h"
21 import InteractiveUI( ghciWelcomeMsg, interactiveUI )
25 import CompManager ( cmInit, cmLoadModules, cmDepAnal )
26 import HscTypes ( GhciMode(..) )
27 import Config ( cBooterVersion, cGhcUnregisterised, cProjectVersion )
28 import SysTools ( getPackageConfigPath, initSysTools, cleanTempFiles )
29 import Packages ( showPackages, getPackageConfigMap, basePackage,
32 import DriverPipeline ( staticLink, doMkDLL, runPipeline )
33 import DriverState ( buildCoreToDo, buildStgToDo,
35 getPackageExtraGhcOpts, unregFlags,
36 v_GhcMode, v_GhcModeFlag, GhcMode(..),
37 v_Keep_tmp_files, v_Ld_inputs, v_Ways,
38 v_OptLevel, v_Output_file, v_Output_hi,
39 readPackageConf, verifyOutputFiles, v_NoLink,
42 import DriverFlags ( buildStaticHscOpts,
43 dynamic_flags, processArgs, static_flags)
45 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
46 import DriverPhases ( isSourceFile )
48 import DriverUtil ( add, handle, handleDyn, later, unknownFlagsErr )
49 import CmdLineOpts ( dynFlag, restoreDynFlags,
50 saveDynFlags, setDynFlags, getDynFlags, dynFlag,
51 DynFlags(..), HscLang(..), v_Static_hsc_opts
53 import BasicTypes ( failed )
56 import Panic ( GhcException(..), panic, installSignalHandlers )
58 import DATA_IOREF ( readIORef, writeIORef )
59 import EXCEPTION ( throwDyn, Exception(..),
60 AsyncException(StackOverflow) )
62 -- Standard Haskell libraries
64 import Directory ( doesFileExist )
65 import System ( getArgs, exitWith, ExitCode(..) )
70 -----------------------------------------------------------------------------
73 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
74 -- time commands when run with -v
78 -- Win32 support: proper signal handling
79 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
80 -- reading the package configuration file is too slow
83 -----------------------------------------------------------------------------
84 -- Differences vs. old driver:
86 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
87 -- consistency checking removed (may do this properly later)
90 -----------------------------------------------------------------------------
94 -- top-level exception handler: any unrecognised exception is a compiler bug.
95 handle (\exception -> do
98 -- an IO exception probably isn't our fault, so don't panic
99 IOException _ -> hPutStr stderr (show exception)
100 AsyncException StackOverflow ->
101 hPutStrLn stderr "stack overflow: use +RTS -K<size> \
103 _other -> hPutStr stderr (show (Panic (show exception)))
104 exitWith (ExitFailure 1)
107 -- all error messages are propagated as exceptions
108 handleDyn (\dyn -> do
111 PhaseFailed _ code -> exitWith code
112 Interrupted -> exitWith (ExitFailure 1)
113 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
114 exitWith (ExitFailure 1)
117 -- make sure we clean up after ourselves
118 later (do forget_it <- readIORef v_Keep_tmp_files
119 unless forget_it $ do
120 verb <- dynFlag verbosity
123 -- exceptions will be blocked while we clean the temporary files,
124 -- so there shouldn't be any difficulty if we receive further
127 installSignalHandlers
130 let (minusB_args, argv') = partition (prefixMatch "-B") argv
131 top_dir <- initSysTools minusB_args
133 -- Read the package configuration
134 conf_file <- getPackageConfigPath
135 readPackageConf conf_file
137 -- Process all the other arguments, and get the source files
138 non_static <- processArgs static_flags argv' []
139 mode <- readIORef v_GhcMode
141 -- -O and --interactive are not a good combination
142 -- ditto with any kind of way selection
143 orig_opt_level <- readIORef v_OptLevel
144 when (orig_opt_level > 0 && mode == DoInteractive) $
145 do putStr "warning: -O conflicts with --interactive; -O turned off.\n"
146 writeIORef v_OptLevel 0
147 orig_ways <- readIORef v_Ways
148 when (notNull orig_ways && mode == DoInteractive) $
149 do throwDyn (UsageError
150 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
152 -- Find the build tag, and re-process the build-specific options.
153 -- Also add in flags for unregisterised compilation, if
154 -- GhcUnregisterised=YES.
155 way_opts <- findBuildTag
156 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
158 pkg_extra_opts <- getPackageExtraGhcOpts
159 extra_non_static <- processArgs static_flags
160 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
162 -- give the static flags to hsc
163 static_opts <- buildStaticHscOpts
164 writeIORef v_Static_hsc_opts static_opts
166 -- build the default DynFlags (these may be adjusted on a per
167 -- module basis by OPTIONS pragmas and settings in the interpreter).
169 core_todo <- buildCoreToDo
170 stg_todo <- buildStgToDo
172 -- set the "global" HscLang. The HscLang can be further adjusted on a module
173 -- by module basis, using only the -fvia-C and -fasm flags. If the global
174 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
175 dyn_flags <- getDynFlags
176 build_tag <- readIORef v_Build_tag
177 let lang = case mode of
178 DoInteractive -> HscInterpreted
179 _other | build_tag /= "" -> HscC
180 | otherwise -> hscLang dyn_flags
181 -- for ways other that the normal way, we must
184 setDynFlags (dyn_flags{ coreToDo = core_todo,
187 -- leave out hscOutName for now
188 hscOutName = panic "Main.main:hscOutName not set",
192 -- The rest of the arguments are "dynamic"
193 -- Leftover ones are presumably files
194 fileish_args <- processArgs dynamic_flags (extra_non_static ++ non_static) []
196 -- save the "initial DynFlags" away
201 We split out the object files (.o, .dll) and add them
202 to v_Ld_inputs for use by the linker.
204 The following things should be considered compilation manager inputs:
206 - haskell source files (strings ending in .hs, .lhs or other
207 haskellish extension),
209 - module names (not forgetting hierarchical module names),
211 - and finally we consider everything not containing a '.' to be
212 a comp manager input, as shorthand for a .hs or .lhs filename.
214 Everything else is considered to be a linker object, and passed
215 straight through to the linker.
217 looks_like_an_input m = isSourceFile m
218 || looksLikeModuleName m
221 (srcs, objs) = partition looks_like_an_input fileish_args
223 mapM_ (add v_Ld_inputs) objs
225 ---------------- Display banners and configuration -----------
226 showBanners mode conf_file static_opts
228 ---------------- Final sanity checking -----------
229 checkOptions mode srcs objs
231 ---------------- Do the business -----------
233 DoMake -> doMake srcs
235 DoMkDependHS -> do { beginMkDependHS ;
236 compileFiles mode srcs;
238 StopBefore p -> do { compileFiles mode srcs; return () }
239 DoMkDLL -> do { o_files <- compileFiles mode srcs;
241 DoLink -> do { o_files <- compileFiles mode srcs;
242 omit_linking <- readIORef v_NoLink;
243 when (not omit_linking)
245 [basePackage, haskell98Package]) }
246 -- We always link in the base package in
247 -- one-shot linking. Any other packages
248 -- required must be given using -package
249 -- options on the command-line.
252 DoInteractive -> throwDyn (CmdLineError "not built for interactive use")
254 DoInteractive -> interactiveUI srcs
257 -- -----------------------------------------------------------------------------
258 -- Option sanity checks
260 checkOptions :: GhcMode -> [String] -> [String] -> IO ()
261 -- Final sanity checking before kicking off a compilation (pipeline).
262 checkOptions mode srcs objs = do
264 ohi <- readIORef v_Output_hi
266 (mode == DoMake || mode == DoInteractive || srcs `lengthExceeds` 1))
267 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
270 -- -o sanity checking
271 o_file <- readIORef v_Output_file
272 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
273 then throwDyn (UsageError "can't apply -o to multiple source files")
276 -- Check that there are some input files (except in the interactive
278 if null srcs && null objs && mode /= DoInteractive
279 then throwDyn (UsageError "no input files")
282 -- Complain about any unknown flags
283 let unknown_opts = [ f | f@('-':_) <- srcs ]
284 when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
286 -- Verify that output files point somewhere sensible.
290 -- -----------------------------------------------------------------------------
291 -- Compile files in one-shot mode.
293 compileFiles :: GhcMode
294 -> [String] -- Source files
295 -> IO [String] -- Object files
296 compileFiles mode srcs = do
297 stop_flag <- readIORef v_GhcModeFlag
298 mapM (compileFile mode stop_flag) srcs
301 compileFile mode stop_flag src = do
304 exists <- doesFileExist src
306 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
308 o_file <- readIORef v_Output_file
309 -- when linking, the -o argument refers to the linker's output.
310 -- otherwise, we use it as the name for the pipeline's output.
312 | mode==DoLink || mode==DoMkDLL = Nothing
315 runPipeline mode stop_flag True maybe_o_file src
318 -- ----------------------------------------------------------------------------
321 doMake :: [String] -> IO ()
322 doMake [] = throwDyn (UsageError "no input files")
324 dflags <- getDynFlags
325 state <- cmInit Batch
326 graph <- cmDepAnal state dflags srcs
327 (_, ok_flag, _) <- cmLoadModules state dflags graph
328 when (failed ok_flag) (exitWith (ExitFailure 1))
331 -- ---------------------------------------------------------------------------
332 -- Various banners and verbosity output.
334 showBanners :: GhcMode -> FilePath -> [String] -> IO ()
335 showBanners mode conf_file static_opts = do
336 verb <- dynFlag verbosity
338 -- Show the GHCi banner
340 when (mode == DoInteractive && verb >= 1) $
341 hPutStrLn stdout ghciWelcomeMsg
344 -- Display details of the configuration in verbose mode
346 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
347 hPutStr stderr cProjectVersion
348 hPutStr stderr ", for Haskell 98, compiled by GHC version "
349 hPutStrLn stderr cBooterVersion)
352 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
354 pkg_details <- getPackageConfigMap
355 showPackages pkg_details
358 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))