1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.137 2004/08/12 13:10:40 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,
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 build_tag <- readIORef v_Build_tag
172 let lang = case mode of
173 DoInteractive -> HscInterpreted
174 DoEval _ -> HscInterpreted
175 _other | build_tag /= "" -> HscC
176 | otherwise -> hscLang dyn_flags
177 -- for ways other that the normal way, we must
180 setDynFlags (dyn_flags{ stgToDo = stg_todo,
182 -- leave out hscOutName for now
183 hscOutName = panic "Main.main:hscOutName not set",
184 verbosity = case mode of
189 -- The rest of the arguments are "dynamic"
190 -- Leftover ones are presumably files
191 fileish_args <- processArgs dynamic_flags (extra_non_static ++ non_static) []
193 -- save the "initial DynFlags" away
198 We split out the object files (.o, .dll) and add them
199 to v_Ld_inputs for use by the linker.
201 The following things should be considered compilation manager inputs:
203 - haskell source files (strings ending in .hs, .lhs or other
204 haskellish extension),
206 - module names (not forgetting hierarchical module names),
208 - and finally we consider everything not containing a '.' to be
209 a comp manager input, as shorthand for a .hs or .lhs filename.
211 Everything else is considered to be a linker object, and passed
212 straight through to the linker.
214 looks_like_an_input m = isSourceFilename m
215 || looksLikeModuleName m
218 -- To simplify the handling of filepaths, we normalise all filepaths right
219 -- away - e.g., for win32 platforms, backslashes are converted
220 -- into forward slashes.
221 normal_fileish_paths = map normalisePath fileish_args
222 (srcs, objs) = partition looks_like_an_input normal_fileish_paths
224 -- Note: have v_Ld_inputs maintain the order in which 'objs' occurred on
226 mapM_ (add v_Ld_inputs) (reverse objs)
228 ---------------- Display banners and configuration -----------
229 showBanners mode conf_file static_opts
231 ---------------- Final sanity checking -----------
232 checkOptions mode srcs objs
234 -- We always link in the base package in
235 -- one-shot linking. Any other packages
236 -- required must be given using -package
237 -- options on the command-line.
238 let def_hs_pkgs = [basePackage, haskell98Package]
240 ---------------- Do the business -----------
242 DoMake -> doMake srcs
244 DoMkDependHS -> do { beginMkDependHS ;
245 compileFiles mode srcs;
247 StopBefore p -> do { compileFiles mode srcs; return () }
248 DoMkDLL -> do { o_files <- compileFiles mode srcs;
249 doMkDLL o_files def_hs_pkgs }
250 DoLink -> do { o_files <- compileFiles mode srcs;
251 omit_linking <- readIORef v_NoLink;
252 when (not omit_linking)
253 (staticLink o_files def_hs_pkgs) }
256 DoInteractive -> noInteractiveError
257 DoEval _ -> noInteractiveError
259 noInteractiveError = throwDyn (CmdLineError "not built for interactive use")
261 DoInteractive -> interactiveUI srcs Nothing
262 DoEval expr -> interactiveUI srcs (Just expr)
265 -- -----------------------------------------------------------------------------
266 -- Option sanity checks
268 checkOptions :: GhcMode -> [String] -> [String] -> IO ()
269 -- Final sanity checking before kicking off a compilation (pipeline).
270 checkOptions mode srcs objs = do
271 -- Complain about any unknown flags
272 let unknown_opts = [ f | f@('-':_) <- srcs ]
273 when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
276 ohi <- readIORef v_Output_hi
278 (mode == DoMake || isInteractive mode || srcs `lengthExceeds` 1))
279 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
282 -- -o sanity checking
283 o_file <- readIORef v_Output_file
284 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
285 then throwDyn (UsageError "can't apply -o to multiple source files")
288 -- Check that there are some input files (except in the interactive
290 if null srcs && null objs && not (isInteractive mode)
291 then throwDyn (UsageError "no input files")
294 -- Verify that output files point somewhere sensible.
297 isInteractive DoInteractive = True
298 isInteractive (DoEval _) = True
299 isInteractive _ = False
301 -- -----------------------------------------------------------------------------
302 -- Compile files in one-shot mode.
304 compileFiles :: GhcMode
305 -> [String] -- Source files
306 -> IO [String] -- Object files
307 compileFiles mode srcs = do
308 stop_flag <- readIORef v_GhcModeFlag
309 mapM (compileFile mode stop_flag) srcs
312 compileFile mode stop_flag src = do
315 exists <- doesFileExist src
317 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
319 o_file <- readIORef v_Output_file
320 -- when linking, the -o argument refers to the linker's output.
321 -- otherwise, we use it as the name for the pipeline's output.
323 | mode==DoLink || mode==DoMkDLL = Nothing
326 runPipeline mode stop_flag True maybe_o_file src Nothing{-no ModLocation-}
329 -- ----------------------------------------------------------------------------
332 doMake :: [String] -> IO ()
333 doMake [] = throwDyn (UsageError "no input files")
335 dflags <- getDynFlags
336 state <- cmInit Batch dflags
337 graph <- cmDepAnal state srcs
338 (_, ok_flag, _) <- cmLoadModules state graph
339 when (failed ok_flag) (exitWith (ExitFailure 1))
342 -- ---------------------------------------------------------------------------
343 -- Various banners and verbosity output.
345 showBanners :: GhcMode -> FilePath -> [String] -> IO ()
346 showBanners mode conf_file static_opts = do
347 verb <- dynFlag verbosity
349 -- Show the GHCi banner
351 when (mode == DoInteractive && verb >= 1) $
352 hPutStrLn stdout ghciWelcomeMsg
355 -- Display details of the configuration in verbose mode
357 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
358 hPutStr stderr cProjectVersion
359 hPutStr stderr ", for Haskell 98, compiled by GHC version "
360 hPutStrLn stderr cBooterVersion)
363 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
365 pkg_details <- getPackageConfigMap
366 showPackages pkg_details
369 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))