1 {-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
3 -----------------------------------------------------------------------------
4 -- $Id: Main.hs,v 1.140 2004/11/11 16:07:46 simonmar 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,
35 findBuildTag, unregFlags,
36 v_GhcMode, v_GhcModeFlag, GhcMode(..),
37 v_Keep_tmp_files, v_Ld_inputs, v_Ways,
38 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 ( isSourceFilename )
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 _ -> hPutStrLn stderr (show exception)
100 AsyncException StackOverflow ->
101 hPutStrLn stderr "stack overflow: use +RTS -K<size> to increase it"
102 _other -> hPutStr stderr (show (Panic (show exception)))
103 exitWith (ExitFailure 1)
106 -- all error messages are propagated as exceptions
107 handleDyn (\dyn -> do
110 PhaseFailed _ code -> exitWith code
111 Interrupted -> exitWith (ExitFailure 1)
112 _ -> do hPutStrLn stderr (show (dyn :: GhcException))
113 exitWith (ExitFailure 1)
116 -- make sure we clean up after ourselves
117 later (do forget_it <- readIORef v_Keep_tmp_files
118 unless forget_it $ do
119 verb <- dynFlag verbosity
122 -- exceptions will be blocked while we clean the temporary files,
123 -- so there shouldn't be any difficulty if we receive further
126 installSignalHandlers
129 let (minusB_args, argv') = partition (prefixMatch "-B") argv
130 top_dir <- initSysTools minusB_args
132 -- Read the package configuration
133 conf_file <- getPackageConfigPath
134 readPackageConf conf_file
136 -- Process all the other arguments, and get the source files
137 non_static <- processArgs static_flags argv' []
138 mode <- readIORef v_GhcMode
140 -- -O and --interactive are not a good combination
141 -- ditto with any kind of way selection
142 orig_ways <- readIORef v_Ways
143 when (notNull orig_ways && isInteractive mode) $
144 do throwDyn (UsageError
145 "--interactive can't be used with -prof, -ticky, -unreg or -smp.")
147 -- Find the build tag, and re-process the build-specific options.
148 -- Also add in flags for unregisterised compilation, if
149 -- GhcUnregisterised=YES.
150 way_opts <- findBuildTag
151 let unreg_opts | cGhcUnregisterised == "YES" = unregFlags
153 extra_non_static <- processArgs static_flags (unreg_opts ++ way_opts) []
155 -- Give the static flags to hsc
156 static_opts <- buildStaticHscOpts
157 writeIORef v_Static_hsc_opts static_opts
159 -- build the default DynFlags (these may be adjusted on a per
160 -- module basis by OPTIONS pragmas and settings in the interpreter).
162 stg_todo <- buildStgToDo
164 -- set the "global" HscLang. The HscLang can be further adjusted on a module
165 -- by module basis, using only the -fvia-C and -fasm flags. If the global
166 -- HscLang is not HscC or HscAsm, -fvia-C and -fasm have no effect.
167 dyn_flags <- getDynFlags
168 let lang = case mode of
169 DoInteractive -> HscInterpreted
170 DoEval _ -> HscInterpreted
171 _other -> hscLang dyn_flags
173 setDynFlags (dyn_flags{ stgToDo = stg_todo,
175 -- leave out hscOutName for now
176 hscOutName = panic "Main.main:hscOutName not set",
177 verbosity = case mode of
182 -- The rest of the arguments are "dynamic"
183 -- Leftover ones are presumably files
184 fileish_args <- processArgs dynamic_flags (extra_non_static ++ non_static) []
186 -- save the "initial DynFlags" away
191 We split out the object files (.o, .dll) and add them
192 to v_Ld_inputs for use by the linker.
194 The following things should be considered compilation manager inputs:
196 - haskell source files (strings ending in .hs, .lhs or other
197 haskellish extension),
199 - module names (not forgetting hierarchical module names),
201 - and finally we consider everything not containing a '.' to be
202 a comp manager input, as shorthand for a .hs or .lhs filename.
204 Everything else is considered to be a linker object, and passed
205 straight through to the linker.
207 looks_like_an_input m = isSourceFilename m
208 || looksLikeModuleName m
211 -- To simplify the handling of filepaths, we normalise all filepaths right
212 -- away - e.g., for win32 platforms, backslashes are converted
213 -- into forward slashes.
214 normal_fileish_paths = map normalisePath fileish_args
215 (srcs, objs) = partition looks_like_an_input normal_fileish_paths
217 -- Note: have v_Ld_inputs maintain the order in which 'objs' occurred on
219 mapM_ (add v_Ld_inputs) (reverse objs)
221 ---------------- Display banners and configuration -----------
222 showBanners mode conf_file static_opts
224 ---------------- Final sanity checking -----------
225 checkOptions mode srcs objs
227 -- We always link in the base package in
228 -- one-shot linking. Any other packages
229 -- required must be given using -package
230 -- options on the command-line.
231 let def_hs_pkgs = [basePackage, haskell98Package]
233 ---------------- Do the business -----------
235 DoMake -> doMake srcs
237 DoMkDependHS -> do { beginMkDependHS ;
238 compileFiles mode srcs;
240 StopBefore p -> do { compileFiles mode srcs; return () }
241 DoMkDLL -> do { o_files <- compileFiles mode srcs;
242 doMkDLL o_files def_hs_pkgs }
243 DoLink -> do { o_files <- compileFiles mode srcs;
244 omit_linking <- readIORef v_NoLink;
245 when (not omit_linking)
246 (staticLink o_files def_hs_pkgs) }
249 DoInteractive -> noInteractiveError
250 DoEval _ -> noInteractiveError
252 noInteractiveError = throwDyn (CmdLineError "not built for interactive use")
254 DoInteractive -> interactiveUI srcs Nothing
255 DoEval expr -> interactiveUI srcs (Just expr)
258 -- -----------------------------------------------------------------------------
259 -- Option sanity checks
261 checkOptions :: GhcMode -> [String] -> [String] -> IO ()
262 -- Final sanity checking before kicking off a compilation (pipeline).
263 checkOptions mode srcs objs = do
264 -- Complain about any unknown flags
265 let unknown_opts = [ f | f@('-':_) <- srcs ]
266 when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
269 ohi <- readIORef v_Output_hi
271 (mode == DoMake || isInteractive mode || srcs `lengthExceeds` 1))
272 then throwDyn (UsageError "-ohi can only be used when compiling a single source file")
275 -- -o sanity checking
276 o_file <- readIORef v_Output_file
277 if (srcs `lengthExceeds` 1 && isJust o_file && mode /= DoLink && mode /= DoMkDLL)
278 then throwDyn (UsageError "can't apply -o to multiple source files")
281 -- Check that there are some input files (except in the interactive
283 if null srcs && null objs && not (isInteractive mode)
284 then throwDyn (UsageError "no input files")
287 -- Verify that output files point somewhere sensible.
290 isInteractive DoInteractive = True
291 isInteractive (DoEval _) = True
292 isInteractive _ = False
294 -- -----------------------------------------------------------------------------
295 -- Compile files in one-shot mode.
297 compileFiles :: GhcMode
298 -> [String] -- Source files
299 -> IO [String] -- Object files
300 compileFiles mode srcs = do
301 stop_flag <- readIORef v_GhcModeFlag
302 mapM (compileFile mode stop_flag) srcs
305 compileFile mode stop_flag src = do
308 exists <- doesFileExist src
310 throwDyn (CmdLineError ("file `" ++ src ++ "' does not exist"))
312 o_file <- readIORef v_Output_file
313 -- when linking, the -o argument refers to the linker's output.
314 -- otherwise, we use it as the name for the pipeline's output.
316 | mode==DoLink || mode==DoMkDLL = Nothing
319 runPipeline mode stop_flag True maybe_o_file src Nothing{-no ModLocation-}
322 -- ----------------------------------------------------------------------------
325 doMake :: [String] -> IO ()
326 doMake [] = throwDyn (UsageError "no input files")
328 dflags <- getDynFlags
329 state <- cmInit Batch dflags
330 graph <- cmDepAnal state srcs
331 (_, ok_flag, _) <- cmLoadModules state graph
332 when (failed ok_flag) (exitWith (ExitFailure 1))
335 -- ---------------------------------------------------------------------------
336 -- Various banners and verbosity output.
338 showBanners :: GhcMode -> FilePath -> [String] -> IO ()
339 showBanners mode conf_file static_opts = do
340 verb <- dynFlag verbosity
342 -- Show the GHCi banner
344 when (mode == DoInteractive && verb >= 1) $
345 hPutStrLn stdout ghciWelcomeMsg
348 -- Display details of the configuration in verbose mode
350 (do hPutStr stderr "Glasgow Haskell Compiler, Version "
351 hPutStr stderr cProjectVersion
352 hPutStr stderr ", for Haskell 98, compiled by GHC version "
353 hPutStrLn stderr cBooterVersion)
356 (hPutStrLn stderr ("Using package config file: " ++ conf_file))
358 pkg_details <- getPackageConfigMap
359 showPackages pkg_details
362 (hPutStrLn stderr ("Hsc static flags: " ++ unwords static_opts))