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 ()
21 touch, -- String -> String -> IO ()
24 normalisePath, -- FilePath -> FilePath
26 -- Temporary-file management
29 cleanTempDirs, cleanTempFiles, cleanTempFilesExcept,
36 #include "HsVersions.h"
47 import Control.Exception
51 import System.Environment
53 import SYSTEM_IO_ERROR as IO
54 import System.Directory
58 #ifndef mingw32_HOST_OS
59 #if __GLASGOW_HASKELL__ > 504
60 import qualified System.Posix.Internals
62 import qualified Posix
64 #else /* Must be Win32 */
66 import CString ( CString, peekCString )
71 #if __GLASGOW_HASKELL__ < 603
72 -- rawSystem comes from libghccompat.a in stage1
73 import Compat.RawSystem ( rawSystem )
74 import System.Cmd ( system )
75 import GHC.IOBase ( IOErrorType(..) )
77 import System.Process ( runInteractiveProcess, getProcessExitCode )
78 import Control.Concurrent( forkIO, newChan, readChan, writeChan )
79 import Data.Char ( isSpace )
80 import FastString ( mkFastString )
81 import SrcLoc ( SrcLoc, mkSrcLoc, noSrcSpan, mkSrcSpan )
86 The configuration story
87 ~~~~~~~~~~~~~~~~~~~~~~~
89 GHC needs various support files (library packages, RTS etc), plus
90 various auxiliary programs (cp, gcc, etc). It finds these in one
93 * When running as an *installed program*, GHC finds most of this support
94 stuff in the installed library tree. The path to this tree is passed
95 to GHC via the -B flag, and given to initSysTools .
97 * When running *in-place* in a build tree, GHC finds most of this support
98 stuff in the build tree. The path to the build tree is, again passed
101 GHC tells which of the two is the case by seeing whether package.conf
102 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
105 SysTools.initSysProgs figures out exactly where all the auxiliary programs
106 are, and initialises mutable variables to make it easy to call them.
107 To to this, it makes use of definitions in Config.hs, which is a Haskell
108 file containing variables whose value is figured out by the build system.
110 Config.hs contains two sorts of things
112 cGCC, The *names* of the programs
115 etc They do *not* include paths
118 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
119 cSPLIT_DIR_REL *relative* to the root of the build tree,
120 for use when running *in-place* in a build tree (only)
124 ---------------------------------------------
125 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
127 Another hair-brained scheme for simplifying the current tool location
128 nightmare in GHC: Simon originally suggested using another
129 configuration file along the lines of GCC's specs file - which is fine
130 except that it means adding code to read yet another configuration
131 file. What I didn't notice is that the current package.conf is
132 general enough to do this:
135 {name = "tools", import_dirs = [], source_dirs = [],
136 library_dirs = [], hs_libraries = [], extra_libraries = [],
137 include_dirs = [], c_includes = [], package_deps = [],
138 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${topdir}/bin/unlit", ... etc.],
139 extra_cc_opts = [], extra_ld_opts = []}
141 Which would have the advantage that we get to collect together in one
142 place the path-specific package stuff with the path-specific tool
145 ---------------------------------------------
147 %************************************************************************
149 \subsection{Initialisation}
151 %************************************************************************
154 initSysTools :: Maybe String -- Maybe TopDir path (without the '-B' prefix)
157 -> IO DynFlags -- Set all the mutable variables above, holding
158 -- (a) the system programs
159 -- (b) the package-config file
160 -- (c) the GHC usage message
163 initSysTools mbMinusB dflags
164 = do { (am_installed, top_dir) <- findTopDir mbMinusB
166 -- for "installed" this is the root of GHC's support files
167 -- for "in-place" it is the root of the build tree
168 -- NB: top_dir is assumed to be in standard Unix
169 -- format, '/' separated
171 ; let installed, installed_bin :: FilePath -> FilePath
172 installed_bin pgm = pgmPath top_dir pgm
173 installed file = pgmPath top_dir file
174 inplace dir pgm = pgmPath (top_dir `joinFileName`
175 cPROJECT_DIR `joinFileName` dir) pgm
178 | am_installed = installed "package.conf"
179 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
182 | am_installed = installed "ghc-usage.txt"
183 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
186 | am_installed = installed "ghci-usage.txt"
187 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghci-usage.txt"
189 -- For all systems, unlit, split, mangle are GHC utilities
190 -- architecture-specific stuff is done when building Config.hs
192 | am_installed = installed_bin cGHC_UNLIT_PGM
193 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
195 -- split and mangle are Perl scripts
197 | am_installed = installed_bin cGHC_SPLIT_PGM
198 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
201 | am_installed = installed_bin cGHC_MANGLER_PGM
202 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
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 -- Hans: this isn't right in general, but you can
336 -- elaborate it in the same way as the others
340 #if defined(mingw32_HOST_OS)
341 foreign import stdcall unsafe "GetTempPathA" getTempPath :: Int -> CString -> IO Int32
347 -- for "installed" this is the root of GHC's support files
348 -- for "in-place" it is the root of the build tree
351 -- 1. Set proto_top_dir
352 -- if there is no given TopDir path, get the directory
353 -- where GHC is running (only on Windows)
355 -- 2. If package.conf exists in proto_top_dir, we are running
356 -- installed; and TopDir = proto_top_dir
358 -- 3. Otherwise we are running in-place, so
359 -- proto_top_dir will be /...stuff.../ghc/compiler
360 -- Set TopDir to /...stuff..., which is the root of the build tree
362 -- This is very gruesome indeed
364 findTopDir :: Maybe String -- Maybe TopDir path (without the '-B' prefix).
365 -> IO (Bool, -- True <=> am installed, False <=> in-place
366 String) -- TopDir (in Unix format '/' separated)
369 = do { top_dir <- get_proto
370 -- Discover whether we're running in a build tree or in an installation,
371 -- by looking for the package configuration file.
372 ; am_installed <- doesFileExist (top_dir `joinFileName` "package.conf")
374 ; return (am_installed, top_dir)
377 -- get_proto returns a Unix-format path (relying on getBaseDir to do so too)
378 get_proto = case mbMinusB of
379 Just minusb -> return (normalisePath minusb)
381 -> do maybe_exec_dir <- getBaseDir -- Get directory of executable
382 case maybe_exec_dir of -- (only works on Windows;
383 -- returns Nothing on Unix)
384 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
385 Just dir -> return dir
389 %************************************************************************
391 \subsection{Running an external program}
393 %************************************************************************
397 runUnlit :: DynFlags -> [Option] -> IO ()
398 runUnlit dflags args = do
400 runSomething dflags "Literate pre-processor" p args
402 runCpp :: DynFlags -> [Option] -> IO ()
403 runCpp dflags args = do
404 let (p,args0) = pgm_P dflags
405 runSomething dflags "C pre-processor" p (args0 ++ args)
407 runPp :: DynFlags -> [Option] -> IO ()
408 runPp dflags args = do
410 runSomething dflags "Haskell pre-processor" p args
412 runCc :: DynFlags -> [Option] -> IO ()
413 runCc dflags args = do
414 let (p,args0) = pgm_c dflags
415 runSomethingFiltered dflags cc_filter "C Compiler" p (args0++args)
417 -- discard some harmless warnings from gcc that we can't turn off
418 cc_filter str = unlines (do_filter (lines str))
422 | (w:rest) <- dropWhile (isJust .matchRegex r_from) ls,
423 isJust (matchRegex r_warn w)
428 r_from = mkRegex "from.*:[0-9]+"
429 r_warn = mkRegex "warning: call-clobbered register used"
431 runMangle :: DynFlags -> [Option] -> IO ()
432 runMangle dflags args = do
433 let (p,args0) = pgm_m dflags
434 runSomething dflags "Mangler" p (args0++args)
436 runSplit :: DynFlags -> [Option] -> IO ()
437 runSplit dflags args = do
438 let (p,args0) = pgm_s dflags
439 runSomething dflags "Splitter" p (args0++args)
441 runAs :: DynFlags -> [Option] -> IO ()
442 runAs dflags args = do
443 let (p,args0) = pgm_a dflags
444 runSomething dflags "Assembler" p (args0++args)
446 runLink :: DynFlags -> [Option] -> IO ()
447 runLink dflags args = do
448 let (p,args0) = pgm_l dflags
449 runSomething dflags "Linker" p (args0++args)
451 runMkDLL :: DynFlags -> [Option] -> IO ()
452 runMkDLL dflags args = do
453 let (p,args0) = pgm_dll dflags
454 runSomething dflags "Make DLL" p (args0++args)
456 touch :: DynFlags -> String -> String -> IO ()
457 touch dflags purpose arg =
458 runSomething dflags purpose (pgm_T dflags) [FileOption "" arg]
460 copy :: DynFlags -> String -> FilePath -> FilePath -> IO ()
461 copy dflags purpose from to = copyWithHeader dflags purpose Nothing from to
463 copyWithHeader :: DynFlags -> String -> Maybe String -> FilePath -> FilePath
465 copyWithHeader dflags purpose maybe_header from to = do
466 showPass dflags purpose
468 h <- openFile to WriteMode
469 ls <- readFile from -- inefficient, but it'll do for now.
470 -- ToDo: speed up via slurping.
471 maybe (return ()) (hPutStr h) maybe_header
477 %************************************************************************
479 \subsection{Managing temporary files
481 %************************************************************************
484 GLOBAL_VAR(v_FilesToClean, [], [String] )
485 GLOBAL_VAR(v_DirsToClean, emptyFM, FiniteMap FilePath FilePath )
489 cleanTempDirs :: DynFlags -> IO ()
491 = unless (dopt Opt_KeepTmpFiles dflags)
492 $ do ds <- readIORef v_DirsToClean
493 removeTmpDirs dflags (eltsFM ds)
494 writeIORef v_DirsToClean emptyFM
496 cleanTempFiles :: DynFlags -> IO ()
497 cleanTempFiles dflags
498 = unless (dopt Opt_KeepTmpFiles dflags)
499 $ do fs <- readIORef v_FilesToClean
500 removeTmpFiles dflags fs
501 writeIORef v_FilesToClean []
503 cleanTempFilesExcept :: DynFlags -> [FilePath] -> IO ()
504 cleanTempFilesExcept dflags dont_delete
505 = unless (dopt Opt_KeepTmpFiles dflags)
506 $ do files <- readIORef v_FilesToClean
507 let (to_keep, to_delete) = partition (`elem` dont_delete) files
508 removeTmpFiles dflags to_delete
509 writeIORef v_FilesToClean to_keep
512 -- find a temporary name that doesn't already exist.
513 newTempName :: DynFlags -> Suffix -> IO FilePath
514 newTempName dflags extn
515 = do d <- getTempDir dflags
517 findTempName (d ++ "/ghc" ++ show x ++ "_") 0
519 findTempName prefix x
520 = do let filename = (prefix ++ show x) `joinFileExt` extn
521 b <- doesFileExist filename
522 if b then findTempName prefix (x+1)
523 else do consIORef v_FilesToClean filename -- clean it up later
526 -- return our temporary directory within tmp_dir, creating one if we
527 -- don't have one yet
528 getTempDir :: DynFlags -> IO FilePath
529 getTempDir dflags@(DynFlags{tmpDir=tmp_dir})
530 = do mapping <- readIORef v_DirsToClean
531 case lookupFM mapping tmp_dir of
534 let prefix = tmp_dir ++ "/ghc" ++ show x ++ "_"
536 = let dirname = prefix ++ show x
537 in do createDirectory dirname
538 let mapping' = addToFM mapping tmp_dir dirname
539 writeIORef v_DirsToClean mapping'
540 debugTraceMsg dflags 2 (ptext SLIT("Created temporary directory:") <+> text dirname)
543 if isAlreadyExistsError e
549 addFilesToClean :: [FilePath] -> IO ()
550 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
551 addFilesToClean files = mapM_ (consIORef v_FilesToClean) files
553 removeTmpDirs :: DynFlags -> [FilePath] -> IO ()
554 removeTmpDirs dflags ds
555 = traceCmd dflags "Deleting temp dirs"
556 ("Deleting: " ++ unwords ds)
557 (mapM_ (removeWith dflags removeDirectory) ds)
559 removeTmpFiles :: DynFlags -> [FilePath] -> IO ()
560 removeTmpFiles dflags fs
562 traceCmd dflags "Deleting temp files"
563 ("Deleting: " ++ unwords deletees)
564 (mapM_ (removeWith dflags removeFile) deletees)
566 -- Flat out refuse to delete files that are likely to be source input
567 -- files (is there a worse bug than having a compiler delete your source
570 -- Deleting source files is a sign of a bug elsewhere, so prominently flag
573 | null non_deletees = act
575 putMsg dflags (text "WARNING - NOT deleting source files:" <+> hsep (map text non_deletees))
578 (non_deletees, deletees) = partition isHaskellUserSrcFilename fs
580 removeWith :: DynFlags -> (FilePath -> IO ()) -> FilePath -> IO ()
581 removeWith dflags remover f = remover f `IO.catch`
583 let msg = if isDoesNotExistError e
584 then ptext SLIT("Warning: deleting non-existent") <+> text f
585 else ptext SLIT("Warning: exception raised when deleting")
588 in debugTraceMsg dflags 2 msg
591 -----------------------------------------------------------------------------
592 -- Running an external program
594 runSomething :: DynFlags
595 -> String -- For -v message
596 -> String -- Command name (possibly a full path)
597 -- assumed already dos-ified
598 -> [Option] -- Arguments
599 -- runSomething will dos-ify them
602 runSomething dflags phase_name pgm args =
603 runSomethingFiltered dflags id phase_name pgm args
606 :: DynFlags -> (String->String) -> String -> String -> [Option] -> IO ()
608 runSomethingFiltered dflags filter_fn phase_name pgm args = do
609 let real_args = filter notNull (map showOpt args)
610 traceCmd dflags phase_name (unwords (pgm:real_args)) $ do
611 (exit_code, doesn'tExist) <-
613 rc <- builderMainLoop dflags filter_fn pgm real_args
615 ExitSuccess{} -> return (rc, False)
617 -- rawSystem returns (ExitFailure 127) if the exec failed for any
618 -- reason (eg. the program doesn't exist). This is the only clue
619 -- we have, but we need to report something to the user because in
620 -- the case of a missing program there will otherwise be no output
622 | n == 127 -> return (rc, True)
623 | otherwise -> return (rc, False))
624 -- Should 'rawSystem' generate an IO exception indicating that
625 -- 'pgm' couldn't be run rather than a funky return code, catch
626 -- this here (the win32 version does this, but it doesn't hurt
627 -- to test for this in general.)
629 if IO.isDoesNotExistError err
630 #if defined(mingw32_HOST_OS) && __GLASGOW_HASKELL__ < 604
631 -- the 'compat' version of rawSystem under mingw32 always
632 -- maps 'errno' to EINVAL to failure.
633 || case (ioeGetErrorType err ) of { InvalidArgument{} -> True ; _ -> False}
635 then return (ExitFailure 1, True)
637 case (doesn'tExist, exit_code) of
638 (True, _) -> throwDyn (InstallationError ("could not execute: " ++ pgm))
639 (_, ExitSuccess) -> return ()
640 _ -> throwDyn (PhaseFailed phase_name exit_code)
644 #if __GLASGOW_HASKELL__ < 603
645 builderMainLoop dflags filter_fn pgm real_args = do
646 rawSystem pgm real_args
648 builderMainLoop dflags filter_fn pgm real_args = do
650 (hStdIn, hStdOut, hStdErr, hProcess) <- runInteractiveProcess pgm real_args Nothing Nothing
652 -- and run a loop piping the output from the compiler to the log_action in DynFlags
653 hSetBuffering hStdOut LineBuffering
654 hSetBuffering hStdErr LineBuffering
655 forkIO (readerProc chan hStdOut filter_fn)
656 forkIO (readerProc chan hStdErr filter_fn)
657 rc <- loop chan hProcess 2 1 ExitSuccess
663 -- status starts at zero, and increments each time either
664 -- a reader process gets EOF, or the build proc exits. We wait
665 -- for all of these to happen (status==3).
666 -- ToDo: we should really have a contingency plan in case any of
667 -- the threads dies, such as a timeout.
668 loop chan hProcess 0 0 exitcode = return exitcode
669 loop chan hProcess t p exitcode = do
671 then getProcessExitCode hProcess
674 Just code -> loop chan hProcess t (p-1) code
680 log_action dflags SevInfo noSrcSpan defaultUserStyle msg
681 loop chan hProcess t p exitcode
682 BuildError loc msg -> do
683 log_action dflags SevError (mkSrcSpan loc loc) defaultUserStyle msg
684 loop chan hProcess t p exitcode
686 loop chan hProcess (t-1) p exitcode
687 | otherwise -> loop chan hProcess t p exitcode
689 readerProc chan hdl filter_fn =
690 (do str <- hGetContents hdl
691 loop (linesPlatform (filter_fn str)) Nothing)
694 -- ToDo: check errors more carefully
695 -- ToDo: in the future, the filter should be implemented as
696 -- a stream transformer.
698 loop [] Nothing = return ()
699 loop [] (Just err) = writeChan chan err
702 Just err@(BuildError srcLoc msg)
703 | leading_whitespace l -> do
704 loop ls (Just (BuildError srcLoc (msg $$ text l)))
712 = case matchRegex errRegex l of
714 writeChan chan (BuildMsg (text l))
716 Just (file':lineno':colno':msg:_) -> do
717 let file = mkFastString file'
718 lineno = read lineno'::Int
719 colno = case colno' of
721 _ -> read (init colno') :: Int
722 srcLoc = mkSrcLoc file lineno colno
723 loop ls (Just (BuildError srcLoc (text msg)))
725 leading_whitespace [] = False
726 leading_whitespace (x:_) = isSpace x
728 errRegex = mkRegex "^([^:]*):([0-9]+):([0-9]+:)?(.*)"
732 | BuildError !SrcLoc !SDoc
736 showOpt (FileOption pre f) = pre ++ platformPath f
737 showOpt (Option "") = ""
738 showOpt (Option s) = s
740 traceCmd :: DynFlags -> String -> String -> IO () -> IO ()
741 -- a) trace the command (at two levels of verbosity)
742 -- b) don't do it at all if dry-run is set
743 traceCmd dflags phase_name cmd_line action
744 = do { let verb = verbosity dflags
745 ; showPass dflags phase_name
746 ; debugTraceMsg dflags 3 (text cmd_line)
750 ; unless (dopt Opt_DryRun dflags) $ do {
753 ; action `IO.catch` handle_exn verb
756 handle_exn verb exn = do { debugTraceMsg dflags 2 (char '\n')
757 ; debugTraceMsg dflags 2 (ptext SLIT("Failed:") <+> text cmd_line <+> text (show exn))
758 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
761 %************************************************************************
763 \subsection{Support code}
765 %************************************************************************
768 -----------------------------------------------------------------------------
769 -- Define getBaseDir :: IO (Maybe String)
771 getBaseDir :: IO (Maybe String)
772 #if defined(mingw32_HOST_OS)
773 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
774 -- return the path $(stuff). Note that we drop the "bin/" directory too.
775 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
776 buf <- mallocArray len
777 ret <- getModuleFileName nullPtr buf len
778 if ret == 0 then free buf >> return Nothing
779 else do s <- peekCString buf
781 return (Just (rootDir s))
783 rootDir s = reverse (dropList "/bin/ghc.exe" (reverse (normalisePath s)))
785 foreign import stdcall unsafe "GetModuleFileNameA"
786 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
788 getBaseDir = return Nothing
791 #ifdef mingw32_HOST_OS
792 foreign import ccall unsafe "_getpid" getProcessID :: IO Int -- relies on Int == Int32 on Windows
793 #elif __GLASGOW_HASKELL__ > 504
794 getProcessID :: IO Int
795 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
797 getProcessID :: IO Int
798 getProcessID = Posix.getProcessID
801 -- Divvy up text stream into lines, taking platform dependent
802 -- line termination into account.
803 linesPlatform :: String -> [String]
804 #if !defined(mingw32_HOST_OS)
805 linesPlatform ls = lines ls
807 linesPlatform "" = []
810 (as,xs1) -> as : linesPlatform xs1
812 lineBreak "" = ("","")
813 lineBreak ('\r':'\n':xs) = ([],xs)
814 lineBreak ('\n':xs) = ([],xs)
815 lineBreak (x:xs) = let (as,bs) = lineBreak xs in (x:as,bs)