1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.139 2004/09/30 10:37:17 simonpj Exp $
8 -- (c) The University of Glasgow 2002
10 -----------------------------------------------------------------------------
12 -- with path so that ghc -M can find config.h
13 #include "../includes/ghcconfig.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,
30 import Packages ( showPackages, getPackageConfigMap, basePackage,
33 import DriverPipeline ( staticLink, doMkDLL, runPipeline )
34 import DriverState ( buildStgToDo,
36 getPackageExtraGhcOpts, unregFlags,
37 v_GhcMode, v_GhcModeFlag, GhcMode(..),
38 v_Keep_tmp_files, v_Ld_inputs, v_Ways,
39 v_Output_file, v_Output_hi,
40 readPackageConf, verifyOutputFiles, v_NoLink,
43 import DriverFlags ( buildStaticHscOpts,
44 dynamic_flags, processArgs, static_flags)
46 import DriverMkDepend ( beginMkDependHS, endMkDependHS )
47 import DriverPhases ( isSourceFilename )
49 import DriverUtil ( add, handle, handleDyn, later, unknownFlagsErr )
50 import CmdLineOpts ( dynFlag, restoreDynFlags,
51 saveDynFlags, setDynFlags, getDynFlags, dynFlag,
52 DynFlags(..), HscLang(..), v_Static_hsc_opts
54 import BasicTypes ( failed )
57 import Panic ( GhcException(..), panic, installSignalHandlers )
59 import DATA_IOREF ( readIORef, writeIORef )
60 import EXCEPTION ( throwDyn, Exception(..),
61 AsyncException(StackOverflow) )
63 -- Standard Haskell libraries
65 import Directory ( doesFileExist )
66 import System ( getArgs, exitWith, ExitCode(..) )
71 -----------------------------------------------------------------------------
74 -- new mkdependHS doesn't support all the options that the old one did (-X et al.)
75 -- time commands when run with -v
79 -- Win32 support: proper signal handling
80 -- make sure OPTIONS in .hs file propogate to .hc file if -C or -keep-hc-file-too
81 -- reading the package configuration file is too slow
84 -----------------------------------------------------------------------------
85 -- Differences vs. old driver:
87 -- No more "Enter your Haskell program, end with ^D (on a line of its own):"
88 -- consistency checking removed (may do this properly later)
91 -----------------------------------------------------------------------------
95 -- top-level exception handler: any unrecognised exception is a compiler bug.
96 handle (\exception -> do
99 -- an IO exception probably isn't our fault, so don't panic
100 IOException _ -> hPutStrLn stderr (show exception)
101 AsyncException StackOverflow ->
102 hPutStrLn stderr "stack overflow: use +RTS -K<size> to increase it"
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_ways <- readIORef v_Ways
144 when (notNull orig_ways && isInteractive mode) $
145 do throwDyn (UsageError
146 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
148 -- Find the build tag, and re-process the build-specific options.
149 -- Also add in flags for unregisterised compilation, if
150 -- GhcUnregisterised=YES.
151 way_opts <- findBuildTag
152 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
154 pkg_extra_opts <- getPackageExtraGhcOpts
155 extra_non_static <- processArgs static_flags
156 (unreg_opts ++ way_opts ++ pkg_extra_opts) []
158 -- Give the static flags to hsc
159 static_opts <- buildStaticHscOpts
160 writeIORef v_Static_hsc_opts static_opts
162 -- build the default DynFlags (these may be adjusted on a per
163 -- module basis by OPTIONS pragmas and settings in the interpreter).
165 stg_todo <- buildStgToDo
167 -- set the "global" HscLang. The HscLang can be further adjusted on a module
168 -- by module basis, using only the -fvia-C and -fasm flags. If the global
169 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
170 dyn_flags <- getDynFlags
171 let lang = case mode of
172 DoInteractive -> HscInterpreted
173 DoEval _ -> HscInterpreted
174 _other -> hscLang dyn_flags
176 setDynFlags (dyn_flags{ stgToDo = stg_todo,
178 -- leave out hscOutName for now
179 hscOutName = panic "Main.main:hscOutName not set",
180 verbosity = case mode of
185 -- The rest of the arguments are "dynamic"
186 -- Leftover ones are presumably files
187 fileish_args <- processArgs dynamic_flags (extra_non_static ++ non_static) []
189 -- save the "initial DynFlags" away
194 We split out the object files (.o, .dll) and add them
195 to v_Ld_inputs for use by the linker.
197 The following things should be considered compilation manager inputs:
199 - haskell source files (strings ending in .hs, .lhs or other
200 haskellish extension),
202 - module names (not forgetting hierarchical module names),
204 - and finally we consider everything not containing a '.' to be
205 a comp manager input, as shorthand for a .hs or .lhs filename.
207 Everything else is considered to be a linker object, and passed
208 straight through to the linker.
210 looks_like_an_input m = isSourceFilename m
211 || looksLikeModuleName m
214 -- To simplify the handling of filepaths, we normalise all filepaths right
215 -- away - e.g., for win32 platforms, backslashes are converted
216 -- into forward slashes.
217 normal_fileish_paths = map normalisePath fileish_args
218 (srcs, objs) = partition looks_like_an_input normal_fileish_paths
220 -- Note: have v_Ld_inputs maintain the order in which 'objs' occurred on
222 mapM_ (add v_Ld_inputs) (reverse objs)
224 ---------------- Display banners and configuration -----------
225 showBanners mode conf_file static_opts
227 ---------------- Final sanity checking -----------
228 checkOptions mode srcs objs
230 -- We always link in the base package in
231 -- one-shot linking. Any other packages
232 -- required must be given using -package
233 -- options on the command-line.
234 let def_hs_pkgs = [basePackage, haskell98Package]
236 ---------------- Do the business -----------
238 DoMake -> doMake srcs
240 DoMkDependHS -> do { beginMkDependHS ;
241 compileFiles mode srcs;
243 StopBefore p -> do { compileFiles mode srcs; return () }
244 DoMkDLL -> do { o_files <- compileFiles mode srcs;
245 doMkDLL o_files def_hs_pkgs }
246 DoLink -> do { o_files <- compileFiles mode srcs;
247 omit_linking <- readIORef v_NoLink;
248 when (not omit_linking)
249 (staticLink o_files def_hs_pkgs) }
252 DoInteractive -> noInteractiveError
253 DoEval _ -> noInteractiveError
255 noInteractiveError = throwDyn (CmdLineError "not built for interactive use")
257 DoInteractive -> interactiveUI srcs Nothing
258 DoEval expr -> interactiveUI srcs (Just expr)
261 -- -----------------------------------------------------------------------------
262 -- Option sanity checks
264 checkOptions :: GhcMode -> [String] -> [String] -> IO ()
265 -- Final sanity checking before kicking off a compilation (pipeline).
266 checkOptions mode srcs objs = do
267 -- Complain about any unknown flags
268 let unknown_opts = [ f | f@('-':_) <- srcs ]
269 when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
272 ohi <- readIORef v_Output_hi
274 (mode == DoMake || isInteractive mode || srcs `lengthExceeds` 1))
275 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
278 -- -o sanity checking
279 o_file <- readIORef v_Output_file
280 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
281 then throwDyn (UsageError "can't apply -o to multiple source files")
284 -- Check that there are some input files (except in the interactive
286 if null srcs && null objs && not (isInteractive mode)
287 then throwDyn (UsageError "no input files")
290 -- Verify that output files point somewhere sensible.
293 isInteractive DoInteractive = True
294 isInteractive (DoEval _) = True
295 isInteractive _ = False
297 -- -----------------------------------------------------------------------------
298 -- Compile files in one-shot mode.
300 compileFiles :: GhcMode
301 -> [String] -- Source files
302 -> IO [String] -- Object files
303 compileFiles mode srcs = do
304 stop_flag <- readIORef v_GhcModeFlag
305 mapM (compileFile mode stop_flag) srcs
308 compileFile mode stop_flag src = do
311 exists <- doesFileExist src
313 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
315 o_file <- readIORef v_Output_file
316 -- when linking, the -o argument refers to the linker's output.
317 -- otherwise, we use it as the name for the pipeline's output.
319 | mode==DoLink || mode==DoMkDLL = Nothing
322 runPipeline mode stop_flag True maybe_o_file src Nothing{-no ModLocation-}
325 -- ----------------------------------------------------------------------------
328 doMake :: [String] -> IO ()
329 doMake [] = throwDyn (UsageError "no input files")
331 dflags <- getDynFlags
332 state <- cmInit Batch dflags
333 graph <- cmDepAnal state srcs
334 (_, ok_flag, _) <- cmLoadModules state graph
335 when (failed ok_flag) (exitWith (ExitFailure 1))
338 -- ---------------------------------------------------------------------------
339 -- Various banners and verbosity output.
341 showBanners :: GhcMode -> FilePath -> [String] -> IO ()
342 showBanners mode conf_file static_opts = do
343 verb <- dynFlag verbosity
345 -- Show the GHCi banner
347 when (mode == DoInteractive && verb >= 1) $
348 hPutStrLn stdout ghciWelcomeMsg
351 -- Display details of the configuration in verbose mode
353 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
354 hPutStr stderr cProjectVersion
355 hPutStr stderr ", for Haskell 98, compiled by GHC version "
356 hPutStrLn stderr cBooterVersion)
359 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
361 pkg_details <- getPackageConfigMap
362 showPackages pkg_details
365 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))