1 -----------------------------------------------------------------------------
3 -- (c) The University of Glasgow 2001-2003
5 -- Access to system tools: gcc, cp, rm etc
7 -----------------------------------------------------------------------------
14 -- Interface to system tools
15 runUnlit, runCpp, runCc, -- [Option] -> IO ()
16 runPp, -- [Option] -> IO ()
17 runMangle, runSplit, -- [Option] -> IO ()
18 runAs, runLink, -- [Option] -> IO ()
22 touch, -- String -> String -> IO ()
25 normalisePath, -- FilePath -> FilePath
28 -- Temporary-file management
31 cleanTempDirs, cleanTempFiles, cleanTempFilesExcept,
38 #include "HsVersions.h"
49 import Control.Exception
53 import System.Environment
55 import SYSTEM_IO_ERROR as IO
56 import System.Directory
61 #ifndef mingw32_HOST_OS
62 import qualified System.Posix.Internals
63 #else /* Must be Win32 */
65 import CString ( CString, peekCString )
68 #if __GLASGOW_HASKELL__ < 603
69 -- rawSystem comes from libghccompat.a in stage1
70 import Compat.RawSystem ( rawSystem )
71 import System.Cmd ( system )
72 import GHC.IOBase ( IOErrorType(..) )
74 import System.Process ( runInteractiveProcess, getProcessExitCode )
75 import Control.Concurrent( forkIO, newChan, readChan, writeChan )
76 import FastString ( mkFastString )
77 import SrcLoc ( SrcLoc, mkSrcLoc, noSrcSpan, mkSrcSpan )
82 The configuration story
83 ~~~~~~~~~~~~~~~~~~~~~~~
85 GHC needs various support files (library packages, RTS etc), plus
86 various auxiliary programs (cp, gcc, etc). It finds these in one
89 * When running as an *installed program*, GHC finds most of this support
90 stuff in the installed library tree. The path to this tree is passed
91 to GHC via the -B flag, and given to initSysTools .
93 * When running *in-place* in a build tree, GHC finds most of this support
94 stuff in the build tree. The path to the build tree is, again passed
97 GHC tells which of the two is the case by seeing whether package.conf
98 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
101 SysTools.initSysProgs figures out exactly where all the auxiliary programs
102 are, and initialises mutable variables to make it easy to call them.
103 To to this, it makes use of definitions in Config.hs, which is a Haskell
104 file containing variables whose value is figured out by the build system.
106 Config.hs contains two sorts of things
108 cGCC, The *names* of the programs
111 etc They do *not* include paths
114 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
115 cSPLIT_DIR_REL *relative* to the root of the build tree,
116 for use when running *in-place* in a build tree (only)
120 ---------------------------------------------
121 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
123 Another hair-brained scheme for simplifying the current tool location
124 nightmare in GHC: Simon originally suggested using another
125 configuration file along the lines of GCC's specs file - which is fine
126 except that it means adding code to read yet another configuration
127 file. What I didn't notice is that the current package.conf is
128 general enough to do this:
131 {name = "tools", import_dirs = [], source_dirs = [],
132 library_dirs = [], hs_libraries = [], extra_libraries = [],
133 include_dirs = [], c_includes = [], package_deps = [],
134 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${topdir}/bin/unlit", ... etc.],
135 extra_cc_opts = [], extra_ld_opts = []}
137 Which would have the advantage that we get to collect together in one
138 place the path-specific package stuff with the path-specific tool
141 ---------------------------------------------
143 %************************************************************************
145 \subsection{Initialisation}
147 %************************************************************************
150 initSysTools :: Maybe String -- Maybe TopDir path (without the '-B' prefix)
153 -> IO DynFlags -- Set all the mutable variables above, holding
154 -- (a) the system programs
155 -- (b) the package-config file
156 -- (c) the GHC usage message
159 initSysTools mbMinusB dflags
160 = do { (am_installed, top_dir) <- findTopDir mbMinusB
162 -- for "installed" this is the root of GHC's support files
163 -- for "in-place" it is the root of the build tree
164 -- NB: top_dir is assumed to be in standard Unix
165 -- format, '/' separated
167 ; let installed, installed_bin :: FilePath -> FilePath
168 installed_bin pgm = pgmPath top_dir pgm
169 installed file = pgmPath top_dir file
170 inplace dir pgm = pgmPath (top_dir `joinFileName`
171 cPROJECT_DIR `joinFileName` dir) pgm
174 | am_installed = installed "package.conf"
175 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
178 | am_installed = installed "ghc-usage.txt"
179 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
182 | am_installed = installed "ghci-usage.txt"
183 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghci-usage.txt"
185 -- For all systems, unlit, split, mangle are GHC utilities
186 -- architecture-specific stuff is done when building Config.hs
188 | am_installed = installed_bin cGHC_UNLIT_PGM
189 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
191 -- split and mangle are Perl scripts
193 | am_installed = installed_bin cGHC_SPLIT_PGM
194 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
197 | am_installed = installed_bin cGHC_MANGLER_PGM
198 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
201 | am_installed = installed_bin "bin/windres"
202 | otherwise = "windres"
204 ; let dflags0 = defaultDynFlags
205 #ifndef mingw32_HOST_OS
206 -- check whether TMPDIR is set in the environment
207 ; e_tmpdir <- IO.try (getEnv "TMPDIR") -- fails if not set
209 -- On Win32, consult GetTempPath() for a temp dir.
210 -- => it first tries TMP, TEMP, then finally the
211 -- Windows directory(!). The directory is in short-path
215 let len = (2048::Int)
216 buf <- mallocArray len
217 ret <- getTempPath len buf
219 -- failed, consult TMPDIR.
227 ; let dflags1 = case e_tmpdir of
229 Right d -> setTmpDir d dflags0
231 -- Check that the package config exists
232 ; config_exists <- doesFileExist pkgconfig_path
233 ; when (not config_exists) $
234 throwDyn (InstallationError
235 ("Can't find package.conf as " ++ pkgconfig_path))
237 #if defined(mingw32_HOST_OS)
238 -- WINDOWS-SPECIFIC STUFF
239 -- On Windows, gcc and friends are distributed with GHC,
240 -- so when "installed" we look in TopDir/bin
241 -- When "in-place" we look wherever the build-time configure
243 -- When "install" we tell gcc where its specs file + exes are (-B)
244 -- and also some places to pick up include files. We need
245 -- to be careful to put all necessary exes in the -B place
246 -- (as, ld, cc1, etc) since if they don't get found there, gcc
247 -- then tries to run unadorned "as", "ld", etc, and will
248 -- pick up whatever happens to be lying around in the path,
249 -- possibly including those from a cygwin install on the target,
250 -- which is exactly what we're trying to avoid.
251 ; let gcc_b_arg = Option ("-B" ++ installed "gcc-lib/")
253 | am_installed = (installed_bin "gcc", [gcc_b_arg])
254 | otherwise = (cGCC, [])
255 -- The trailing "/" is absolutely essential; gcc seems
256 -- to construct file names simply by concatenating to
257 -- this -B path with no extra slash We use "/" rather
258 -- than "\\" because otherwise "\\\" is mangled
259 -- later on; although gcc_args are in NATIVE format,
261 -- (see comments with declarations of global variables)
263 -- The quotes round the -B argument are in case TopDir
266 perl_path | am_installed = installed_bin cGHC_PERL
267 | otherwise = cGHC_PERL
269 -- 'touch' is a GHC util for Windows, and similarly unlit, mangle
270 ; let touch_path | am_installed = installed_bin cGHC_TOUCHY_PGM
271 | otherwise = inplace cGHC_TOUCHY_DIR_REL cGHC_TOUCHY_PGM
273 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
274 -- a call to Perl to get the invocation of split and mangle
275 ; let (split_prog, split_args) = (perl_path, [Option split_script])
276 (mangle_prog, mangle_args) = (perl_path, [Option mangle_script])
278 ; let (mkdll_prog, mkdll_args)
280 (pgmPath (installed "gcc-lib/") cMKDLL,
281 [ Option "--dlltool-name",
282 Option (pgmPath (installed "gcc-lib/") "dlltool"),
283 Option "--driver-name",
284 Option gcc_prog, gcc_b_arg ])
285 | otherwise = (cMKDLL, [])
287 -- UNIX-SPECIFIC STUFF
288 -- On Unix, the "standard" tools are assumed to be
289 -- in the same place whether we are running "in-place" or "installed"
290 -- That place is wherever the build-time configure script found them.
291 ; let gcc_prog = cGCC
294 mkdll_prog = panic "Can't build DLLs on a non-Win32 system"
297 -- On Unix, scripts are invoked using the '#!' method. Binary
298 -- installations of GHC on Unix place the correct line on the front
299 -- of the script at installation time, so we don't want to wire-in
300 -- our knowledge of $(PERL) on the host system here.
301 ; let (split_prog, split_args) = (split_script, [])
302 (mangle_prog, mangle_args) = (mangle_script, [])
305 -- cpp is derived from gcc on all platforms
306 -- HACK, see setPgmP below. We keep 'words' here to remember to fix
307 -- Config.hs one day.
308 ; let cpp_path = (gcc_prog, gcc_args ++
309 (Option "-E"):(map Option (words cRAWCPP_FLAGS)))
311 -- For all systems, copy and remove are provided by the host
312 -- system; architecture-specific stuff is done when building Config.hs
313 ; let cp_path = cGHC_CP
315 -- Other things being equal, as and ld are simply gcc
316 ; let (as_prog,as_args) = (gcc_prog,gcc_args)
317 (ld_prog,ld_args) = (gcc_prog,gcc_args)
320 ghcUsagePath = ghc_usage_msg_path,
321 ghciUsagePath = ghci_usage_msg_path,
323 systemPackageConfig = pkgconfig_path,
327 pgm_c = (gcc_prog,gcc_args),
328 pgm_m = (mangle_prog,mangle_args),
329 pgm_s = (split_prog,split_args),
330 pgm_a = (as_prog,as_args),
331 pgm_l = (ld_prog,ld_args),
332 pgm_dll = (mkdll_prog,mkdll_args),
334 pgm_sysman = top_dir ++ "/ghc/rts/parallel/SysMan",
335 pgm_windres = windres_path
336 -- Hans: this isn't right in general, but you can
337 -- elaborate it in the same way as the others
341 #if defined(mingw32_HOST_OS)
342 foreign import stdcall unsafe "GetTempPathA" getTempPath :: Int -> CString -> IO Int32
348 -- for "installed" this is the root of GHC's support files
349 -- for "in-place" it is the root of the build tree
352 -- 1. Set proto_top_dir
353 -- if there is no given TopDir path, get the directory
354 -- where GHC is running (only on Windows)
356 -- 2. If package.conf exists in proto_top_dir, we are running
357 -- installed; and TopDir = proto_top_dir
359 -- 3. Otherwise we are running in-place, so
360 -- proto_top_dir will be /...stuff.../ghc/compiler
361 -- Set TopDir to /...stuff..., which is the root of the build tree
363 -- This is very gruesome indeed
365 findTopDir :: Maybe String -- Maybe TopDir path (without the '-B' prefix).
366 -> IO (Bool, -- True <=> am installed, False <=> in-place
367 String) -- TopDir (in Unix format '/' separated)
370 = do { top_dir <- get_proto
371 -- Discover whether we're running in a build tree or in an installation,
372 -- by looking for the package configuration file.
373 ; am_installed <- doesFileExist (top_dir `joinFileName` "package.conf")
375 ; return (am_installed, top_dir)
378 -- get_proto returns a Unix-format path (relying on getBaseDir to do so too)
379 get_proto = case mbMinusB of
380 Just minusb -> return (normalisePath minusb)
382 -> do maybe_exec_dir <- getBaseDir -- Get directory of executable
383 case maybe_exec_dir of -- (only works on Windows;
384 -- returns Nothing on Unix)
385 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
386 Just dir -> return dir
390 %************************************************************************
392 \subsection{Running an external program}
394 %************************************************************************
398 runUnlit :: DynFlags -> [Option] -> IO ()
399 runUnlit dflags args = do
401 runSomething dflags "Literate pre-processor" p args
403 runCpp :: DynFlags -> [Option] -> IO ()
404 runCpp dflags args = do
405 let (p,args0) = pgm_P dflags
406 runSomething dflags "C pre-processor" p (args0 ++ args)
408 runPp :: DynFlags -> [Option] -> IO ()
409 runPp dflags args = do
411 runSomething dflags "Haskell pre-processor" p args
413 runCc :: DynFlags -> [Option] -> IO ()
414 runCc dflags args = do
415 let (p,args0) = pgm_c dflags
416 args1 = args0 ++ args
417 mb_env <- getGccEnv args1
418 runSomethingFiltered dflags cc_filter "C Compiler" p args1 mb_env
420 -- discard some harmless warnings from gcc that we can't turn off
421 cc_filter = unlines . doFilter . lines
424 gcc gives warnings in chunks like so:
425 In file included from /foo/bar/baz.h:11,
426 from /foo/bar/baz2.h:22,
428 /foo/flibble:14: global register variable ...
429 /foo/flibble:15: warning: call-clobbered r...
430 We break it up into its chunks, remove any call-clobbered register
431 warnings from each chunk, and then delete any chunks that we have
434 doFilter = unChunkWarnings . filterWarnings . chunkWarnings []
435 -- We can't assume that the output will start with an "In file inc..."
436 -- line, so we start off expecting a list of warnings rather than a
438 chunkWarnings :: [String] -- The location stack to use for the next
440 -> [String] -- The remaining lines to look at
441 -> [([String], [String])]
442 chunkWarnings loc_stack [] = [(loc_stack, [])]
443 chunkWarnings loc_stack xs
444 = case break loc_stack_start xs of
445 (warnings, lss:xs') ->
446 case span loc_start_continuation xs' of
448 (loc_stack, warnings) : chunkWarnings (lss : lsc) xs''
449 _ -> [(loc_stack, xs)]
451 filterWarnings :: [([String], [String])] -> [([String], [String])]
452 filterWarnings [] = []
453 -- If the warnings are already empty then we are probably doing
454 -- something wrong, so don't delete anything
455 filterWarnings ((xs, []) : zs) = (xs, []) : filterWarnings zs
456 filterWarnings ((xs, ys) : zs) = case filter wantedWarning ys of
457 [] -> filterWarnings zs
458 ys' -> (xs, ys') : filterWarnings zs
460 unChunkWarnings :: [([String], [String])] -> [String]
461 unChunkWarnings [] = []
462 unChunkWarnings ((xs, ys) : zs) = xs ++ ys ++ unChunkWarnings zs
464 loc_stack_start s = "In file included from " `isPrefixOf` s
465 loc_start_continuation s = " from " `isPrefixOf` s
467 | "warning: call-clobbered register used" `isContainedIn` w = False
470 isContainedIn :: String -> String -> Bool
471 xs `isContainedIn` ys = any (xs `isPrefixOf`) (tails ys)
473 -- If the -B<dir> option is set, add <dir> to PATH. This works around
474 -- a bug in gcc on Windows Vista where it can't find its auxiliary
475 -- binaries (see bug #1110).
476 getGccEnv :: [Option] -> IO (Maybe [(String,String)])
478 #if __GLASGOW_HASKELL__ < 603
483 else do env <- getEnvironment
484 return (Just (map mangle_path env))
486 (b_dirs, _) = partitionWith get_b_opt opts
488 get_b_opt (Option ('-':'B':dir)) = Left dir
489 get_b_opt other = Right other
491 mangle_path (path,paths) | map toUpper path == "PATH"
492 = (path, '\"' : head b_dirs ++ "\";" ++ paths)
493 mangle_path other = other
496 runMangle :: DynFlags -> [Option] -> IO ()
497 runMangle dflags args = do
498 let (p,args0) = pgm_m dflags
499 runSomething dflags "Mangler" p (args0++args)
501 runSplit :: DynFlags -> [Option] -> IO ()
502 runSplit dflags args = do
503 let (p,args0) = pgm_s dflags
504 runSomething dflags "Splitter" p (args0++args)
506 runAs :: DynFlags -> [Option] -> IO ()
507 runAs dflags args = do
508 let (p,args0) = pgm_a dflags
509 args1 = args0 ++ args
510 mb_env <- getGccEnv args1
511 runSomethingFiltered dflags id "Assembler" p args1 mb_env
513 runLink :: DynFlags -> [Option] -> IO ()
514 runLink dflags args = do
515 let (p,args0) = pgm_l dflags
516 args1 = args0 ++ args
517 mb_env <- getGccEnv args1
518 runSomethingFiltered dflags id "Linker" p args1 mb_env
520 runMkDLL :: DynFlags -> [Option] -> IO ()
521 runMkDLL dflags args = do
522 let (p,args0) = pgm_dll dflags
523 args1 = args0 ++ args
524 mb_env <- getGccEnv (args0++args)
525 runSomethingFiltered dflags id "Make DLL" p args1 mb_env
527 runWindres :: DynFlags -> [Option] -> IO ()
528 runWindres dflags args = do
529 let (gcc,gcc_args) = pgm_c dflags
530 windres = pgm_windres dflags
531 runSomething dflags "Windres" windres
532 (Option ("--preprocessor=" ++ gcc ++ " " ++
533 unwords (map showOpt gcc_args) ++
534 " -E -xc -DRC_INVOKED")
536 -- we must tell windres where to find gcc: it might not be on PATH
538 touch :: DynFlags -> String -> String -> IO ()
539 touch dflags purpose arg =
540 runSomething dflags purpose (pgm_T dflags) [FileOption "" arg]
542 copy :: DynFlags -> String -> FilePath -> FilePath -> IO ()
543 copy dflags purpose from to = copyWithHeader dflags purpose Nothing from to
545 copyWithHeader :: DynFlags -> String -> Maybe String -> FilePath -> FilePath
547 copyWithHeader dflags purpose maybe_header from to = do
548 showPass dflags purpose
550 h <- openFile to WriteMode
551 ls <- readFile from -- inefficient, but it'll do for now.
552 -- ToDo: speed up via slurping.
553 maybe (return ()) (hPutStr h) maybe_header
557 getExtraViaCOpts :: DynFlags -> IO [String]
558 getExtraViaCOpts dflags = do
559 f <- readFile (topDir dflags `joinFileName` "extra-gcc-opts")
563 %************************************************************************
565 \subsection{Managing temporary files
567 %************************************************************************
570 GLOBAL_VAR(v_FilesToClean, [], [String] )
571 GLOBAL_VAR(v_DirsToClean, emptyFM, FiniteMap FilePath FilePath )
575 cleanTempDirs :: DynFlags -> IO ()
577 = unless (dopt Opt_KeepTmpFiles dflags)
578 $ do ds <- readIORef v_DirsToClean
579 removeTmpDirs dflags (eltsFM ds)
580 writeIORef v_DirsToClean emptyFM
582 cleanTempFiles :: DynFlags -> IO ()
583 cleanTempFiles dflags
584 = unless (dopt Opt_KeepTmpFiles dflags)
585 $ do fs <- readIORef v_FilesToClean
586 removeTmpFiles dflags fs
587 writeIORef v_FilesToClean []
589 cleanTempFilesExcept :: DynFlags -> [FilePath] -> IO ()
590 cleanTempFilesExcept dflags dont_delete
591 = unless (dopt Opt_KeepTmpFiles dflags)
592 $ do files <- readIORef v_FilesToClean
593 let (to_keep, to_delete) = partition (`elem` dont_delete) files
594 removeTmpFiles dflags to_delete
595 writeIORef v_FilesToClean to_keep
598 -- find a temporary name that doesn't already exist.
599 newTempName :: DynFlags -> Suffix -> IO FilePath
600 newTempName dflags extn
601 = do d <- getTempDir dflags
603 findTempName (d ++ "/ghc" ++ show x ++ "_") 0
605 findTempName :: FilePath -> Integer -> IO FilePath
606 findTempName prefix x
607 = do let filename = (prefix ++ show x) `joinFileExt` extn
608 b <- doesFileExist filename
609 if b then findTempName prefix (x+1)
610 else do consIORef v_FilesToClean filename -- clean it up later
613 -- return our temporary directory within tmp_dir, creating one if we
614 -- don't have one yet
615 getTempDir :: DynFlags -> IO FilePath
616 getTempDir dflags@(DynFlags{tmpDir=tmp_dir})
617 = do mapping <- readIORef v_DirsToClean
618 case lookupFM mapping tmp_dir of
621 let prefix = tmp_dir ++ "/ghc" ++ show x ++ "_"
623 mkTempDir :: Integer -> IO FilePath
625 = let dirname = prefix ++ show x
626 in do createDirectory dirname
627 let mapping' = addToFM mapping tmp_dir dirname
628 writeIORef v_DirsToClean mapping'
629 debugTraceMsg dflags 2 (ptext SLIT("Created temporary directory:") <+> text dirname)
632 if isAlreadyExistsError e
638 addFilesToClean :: [FilePath] -> IO ()
639 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
640 addFilesToClean files = mapM_ (consIORef v_FilesToClean) files
642 removeTmpDirs :: DynFlags -> [FilePath] -> IO ()
643 removeTmpDirs dflags ds
644 = traceCmd dflags "Deleting temp dirs"
645 ("Deleting: " ++ unwords ds)
646 (mapM_ (removeWith dflags removeDirectory) ds)
648 removeTmpFiles :: DynFlags -> [FilePath] -> IO ()
649 removeTmpFiles dflags fs
651 traceCmd dflags "Deleting temp files"
652 ("Deleting: " ++ unwords deletees)
653 (mapM_ (removeWith dflags removeFile) deletees)
655 -- Flat out refuse to delete files that are likely to be source input
656 -- files (is there a worse bug than having a compiler delete your source
659 -- Deleting source files is a sign of a bug elsewhere, so prominently flag
662 | null non_deletees = act
664 putMsg dflags (text "WARNING - NOT deleting source files:" <+> hsep (map text non_deletees))
667 (non_deletees, deletees) = partition isHaskellUserSrcFilename fs
669 removeWith :: DynFlags -> (FilePath -> IO ()) -> FilePath -> IO ()
670 removeWith dflags remover f = remover f `IO.catch`
672 let msg = if isDoesNotExistError e
673 then ptext SLIT("Warning: deleting non-existent") <+> text f
674 else ptext SLIT("Warning: exception raised when deleting")
677 in debugTraceMsg dflags 2 msg
680 -----------------------------------------------------------------------------
681 -- Running an external program
683 runSomething :: DynFlags
684 -> String -- For -v message
685 -> String -- Command name (possibly a full path)
686 -- assumed already dos-ified
687 -> [Option] -- Arguments
688 -- runSomething will dos-ify them
691 runSomething dflags phase_name pgm args =
692 runSomethingFiltered dflags id phase_name pgm args Nothing
695 :: DynFlags -> (String->String) -> String -> String -> [Option]
696 -> Maybe [(String,String)] -> IO ()
698 runSomethingFiltered dflags filter_fn phase_name pgm args mb_env = do
699 let real_args = filter notNull (map showOpt args)
700 traceCmd dflags phase_name (unwords (pgm:real_args)) $ do
701 (exit_code, doesn'tExist) <-
703 rc <- builderMainLoop dflags filter_fn pgm real_args mb_env
705 ExitSuccess{} -> return (rc, False)
707 -- rawSystem returns (ExitFailure 127) if the exec failed for any
708 -- reason (eg. the program doesn't exist). This is the only clue
709 -- we have, but we need to report something to the user because in
710 -- the case of a missing program there will otherwise be no output
712 | n == 127 -> return (rc, True)
713 | otherwise -> return (rc, False))
714 -- Should 'rawSystem' generate an IO exception indicating that
715 -- 'pgm' couldn't be run rather than a funky return code, catch
716 -- this here (the win32 version does this, but it doesn't hurt
717 -- to test for this in general.)
719 if IO.isDoesNotExistError err
720 #if defined(mingw32_HOST_OS) && __GLASGOW_HASKELL__ < 604
721 -- the 'compat' version of rawSystem under mingw32 always
722 -- maps 'errno' to EINVAL to failure.
723 || case (ioeGetErrorType err ) of { InvalidArgument{} -> True ; _ -> False}
725 then return (ExitFailure 1, True)
727 case (doesn'tExist, exit_code) of
728 (True, _) -> throwDyn (InstallationError ("could not execute: " ++ pgm))
729 (_, ExitSuccess) -> return ()
730 _ -> throwDyn (PhaseFailed phase_name exit_code)
734 #if __GLASGOW_HASKELL__ < 603
735 builderMainLoop dflags filter_fn pgm real_args mb_env = do
736 rawSystem pgm real_args
738 builderMainLoop dflags filter_fn pgm real_args mb_env = do
740 (hStdIn, hStdOut, hStdErr, hProcess) <- runInteractiveProcess pgm real_args Nothing mb_env
742 -- and run a loop piping the output from the compiler to the log_action in DynFlags
743 hSetBuffering hStdOut LineBuffering
744 hSetBuffering hStdErr LineBuffering
745 forkIO (readerProc chan hStdOut filter_fn)
746 forkIO (readerProc chan hStdErr filter_fn)
747 -- we don't want to finish until 2 streams have been completed
748 -- (stdout and stderr)
749 -- nor until 1 exit code has been retrieved.
750 rc <- loop chan hProcess (2::Integer) (1::Integer) ExitSuccess
751 -- after that, we're done here.
757 -- status starts at zero, and increments each time either
758 -- a reader process gets EOF, or the build proc exits. We wait
759 -- for all of these to happen (status==3).
760 -- ToDo: we should really have a contingency plan in case any of
761 -- the threads dies, such as a timeout.
762 loop chan hProcess 0 0 exitcode = return exitcode
763 loop chan hProcess t p exitcode = do
765 then getProcessExitCode hProcess
768 Just code -> loop chan hProcess t (p-1) code
774 log_action dflags SevInfo noSrcSpan defaultUserStyle msg
775 loop chan hProcess t p exitcode
776 BuildError loc msg -> do
777 log_action dflags SevError (mkSrcSpan loc loc) defaultUserStyle msg
778 loop chan hProcess t p exitcode
780 loop chan hProcess (t-1) p exitcode
781 | otherwise -> loop chan hProcess t p exitcode
783 readerProc chan hdl filter_fn =
784 (do str <- hGetContents hdl
785 loop (linesPlatform (filter_fn str)) Nothing)
788 -- ToDo: check errors more carefully
789 -- ToDo: in the future, the filter should be implemented as
790 -- a stream transformer.
792 loop [] Nothing = return ()
793 loop [] (Just err) = writeChan chan err
796 Just err@(BuildError srcLoc msg)
797 | leading_whitespace l -> do
798 loop ls (Just (BuildError srcLoc (msg $$ text l)))
806 = case parseError l of
808 writeChan chan (BuildMsg (text l))
810 Just (file, lineNum, colNum, msg) -> do
811 let srcLoc = mkSrcLoc (mkFastString file) lineNum colNum
812 loop ls (Just (BuildError srcLoc (text msg)))
814 leading_whitespace [] = False
815 leading_whitespace (x:_) = isSpace x
817 parseError :: String -> Maybe (String, Int, Int, String)
818 parseError s0 = case breakColon s0 of
819 Just (filename, s1) ->
820 case breakIntColon s1 of
821 Just (lineNum, s2) ->
822 case breakIntColon s2 of
823 Just (columnNum, s3) ->
824 Just (filename, lineNum, columnNum, s3)
826 Just (filename, lineNum, 0, s2)
830 breakColon :: String -> Maybe (String, String)
831 breakColon xs = case break (':' ==) xs of
832 (ys, _:zs) -> Just (ys, zs)
835 breakIntColon :: String -> Maybe (Int, String)
836 breakIntColon xs = case break (':' ==) xs of
838 | not (null ys) && all isAscii ys && all isDigit ys ->
844 | BuildError !SrcLoc !SDoc
848 showOpt (FileOption pre f) = pre ++ platformPath f
849 showOpt (Option "") = ""
850 showOpt (Option s) = s
852 traceCmd :: DynFlags -> String -> String -> IO () -> IO ()
853 -- a) trace the command (at two levels of verbosity)
854 -- b) don't do it at all if dry-run is set
855 traceCmd dflags phase_name cmd_line action
856 = do { let verb = verbosity dflags
857 ; showPass dflags phase_name
858 ; debugTraceMsg dflags 3 (text cmd_line)
862 ; unless (dopt Opt_DryRun dflags) $ do {
865 ; action `IO.catch` handle_exn verb
868 handle_exn verb exn = do { debugTraceMsg dflags 2 (char '\n')
869 ; debugTraceMsg dflags 2 (ptext SLIT("Failed:") <+> text cmd_line <+> text (show exn))
870 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
873 %************************************************************************
875 \subsection{Support code}
877 %************************************************************************
880 -----------------------------------------------------------------------------
881 -- Define getBaseDir :: IO (Maybe String)
883 getBaseDir :: IO (Maybe String)
884 #if defined(mingw32_HOST_OS)
885 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
886 -- return the path $(stuff). Note that we drop the "bin/" directory too.
887 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
888 buf <- mallocArray len
889 ret <- getModuleFileName nullPtr buf len
890 if ret == 0 then free buf >> return Nothing
891 else do s <- peekCString buf
893 return (Just (rootDir s))
895 rootDir s = reverse (dropList "/bin/ghc.exe" (reverse (normalisePath s)))
897 foreign import stdcall unsafe "GetModuleFileNameA"
898 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
900 getBaseDir = return Nothing
903 #ifdef mingw32_HOST_OS
904 foreign import ccall unsafe "_getpid" getProcessID :: IO Int -- relies on Int == Int32 on Windows
906 getProcessID :: IO Int
907 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
910 -- Divvy up text stream into lines, taking platform dependent
911 -- line termination into account.
912 linesPlatform :: String -> [String]
913 #if !defined(mingw32_HOST_OS)
914 linesPlatform ls = lines ls
916 linesPlatform "" = []
919 (as,xs1) -> as : linesPlatform xs1
921 lineBreak "" = ("","")
922 lineBreak ('\r':'\n':xs) = ([],xs)
923 lineBreak ('\n':xs) = ([],xs)
924 lineBreak (x:xs) = let (as,bs) = lineBreak xs in (x:as,bs)