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 (args1,mb_env) <- getGccEnv (args0++args)
416 runSomethingFiltered dflags cc_filter "C Compiler" p args1 mb_env
418 -- discard some harmless warnings from gcc that we can't turn off
419 cc_filter str = unlines (do_filter (lines str))
423 | (w:rest) <- dropWhile (isJust .matchRegex r_from) ls,
424 isJust (matchRegex r_warn w)
429 r_from = mkRegex "from.*:[0-9]+"
430 r_warn = mkRegex "warning: call-clobbered register used"
432 -- Turn the -B<dir> option to gcc into the GCC_EXEC_PREFIX env var, to
433 -- workaround a bug in MinGW gcc on Windows Vista, see bug #1110.
434 getGccEnv :: [Option] -> IO ([Option], Maybe [(String,String)])
436 #if __GLASGOW_HASKELL__ < 603
437 return (opts,Nothing)
440 then return (opts,Nothing)
441 else do env <- getEnvironment
442 return (rest, Just (("GCC_EXEC_PREFIX", head b_dirs) : env))
444 (b_dirs, rest) = partitionWith get_b_opt opts
446 get_b_opt (Option ('-':'B':dir)) = Left dir
447 get_b_opt other = Right other
450 runMangle :: DynFlags -> [Option] -> IO ()
451 runMangle dflags args = do
452 let (p,args0) = pgm_m dflags
453 runSomething dflags "Mangler" p (args0++args)
455 runSplit :: DynFlags -> [Option] -> IO ()
456 runSplit dflags args = do
457 let (p,args0) = pgm_s dflags
458 runSomething dflags "Splitter" p (args0++args)
460 runAs :: DynFlags -> [Option] -> IO ()
461 runAs dflags args = do
462 let (p,args0) = pgm_a dflags
463 runSomething dflags "Assembler" p (args0++args)
465 runLink :: DynFlags -> [Option] -> IO ()
466 runLink dflags args = do
467 let (p,args0) = pgm_l dflags
468 runSomething dflags "Linker" p (args0++args)
470 runMkDLL :: DynFlags -> [Option] -> IO ()
471 runMkDLL dflags args = do
472 let (p,args0) = pgm_dll dflags
473 (args1,mb_env) <- getGccEnv (args0++args)
474 runSomethingFiltered dflags id "Make DLL" p args1 mb_env
476 touch :: DynFlags -> String -> String -> IO ()
477 touch dflags purpose arg =
478 runSomething dflags purpose (pgm_T dflags) [FileOption "" arg]
480 copy :: DynFlags -> String -> FilePath -> FilePath -> IO ()
481 copy dflags purpose from to = copyWithHeader dflags purpose Nothing from to
483 copyWithHeader :: DynFlags -> String -> Maybe String -> FilePath -> FilePath
485 copyWithHeader dflags purpose maybe_header from to = do
486 showPass dflags purpose
488 h <- openFile to WriteMode
489 ls <- readFile from -- inefficient, but it'll do for now.
490 -- ToDo: speed up via slurping.
491 maybe (return ()) (hPutStr h) maybe_header
497 %************************************************************************
499 \subsection{Managing temporary files
501 %************************************************************************
504 GLOBAL_VAR(v_FilesToClean, [], [String] )
505 GLOBAL_VAR(v_DirsToClean, emptyFM, FiniteMap FilePath FilePath )
509 cleanTempDirs :: DynFlags -> IO ()
511 = unless (dopt Opt_KeepTmpFiles dflags)
512 $ do ds <- readIORef v_DirsToClean
513 removeTmpDirs dflags (eltsFM ds)
514 writeIORef v_DirsToClean emptyFM
516 cleanTempFiles :: DynFlags -> IO ()
517 cleanTempFiles dflags
518 = unless (dopt Opt_KeepTmpFiles dflags)
519 $ do fs <- readIORef v_FilesToClean
520 removeTmpFiles dflags fs
521 writeIORef v_FilesToClean []
523 cleanTempFilesExcept :: DynFlags -> [FilePath] -> IO ()
524 cleanTempFilesExcept dflags dont_delete
525 = unless (dopt Opt_KeepTmpFiles dflags)
526 $ do files <- readIORef v_FilesToClean
527 let (to_keep, to_delete) = partition (`elem` dont_delete) files
528 removeTmpFiles dflags to_delete
529 writeIORef v_FilesToClean to_keep
532 -- find a temporary name that doesn't already exist.
533 newTempName :: DynFlags -> Suffix -> IO FilePath
534 newTempName dflags extn
535 = do d <- getTempDir dflags
537 findTempName (d ++ "/ghc" ++ show x ++ "_") 0
539 findTempName prefix x
540 = do let filename = (prefix ++ show x) `joinFileExt` extn
541 b <- doesFileExist filename
542 if b then findTempName prefix (x+1)
543 else do consIORef v_FilesToClean filename -- clean it up later
546 -- return our temporary directory within tmp_dir, creating one if we
547 -- don't have one yet
548 getTempDir :: DynFlags -> IO FilePath
549 getTempDir dflags@(DynFlags{tmpDir=tmp_dir})
550 = do mapping <- readIORef v_DirsToClean
551 case lookupFM mapping tmp_dir of
554 let prefix = tmp_dir ++ "/ghc" ++ show x ++ "_"
556 = let dirname = prefix ++ show x
557 in do createDirectory dirname
558 let mapping' = addToFM mapping tmp_dir dirname
559 writeIORef v_DirsToClean mapping'
560 debugTraceMsg dflags 2 (ptext SLIT("Created temporary directory:") <+> text dirname)
563 if isAlreadyExistsError e
569 addFilesToClean :: [FilePath] -> IO ()
570 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
571 addFilesToClean files = mapM_ (consIORef v_FilesToClean) files
573 removeTmpDirs :: DynFlags -> [FilePath] -> IO ()
574 removeTmpDirs dflags ds
575 = traceCmd dflags "Deleting temp dirs"
576 ("Deleting: " ++ unwords ds)
577 (mapM_ (removeWith dflags removeDirectory) ds)
579 removeTmpFiles :: DynFlags -> [FilePath] -> IO ()
580 removeTmpFiles dflags fs
582 traceCmd dflags "Deleting temp files"
583 ("Deleting: " ++ unwords deletees)
584 (mapM_ (removeWith dflags removeFile) deletees)
586 -- Flat out refuse to delete files that are likely to be source input
587 -- files (is there a worse bug than having a compiler delete your source
590 -- Deleting source files is a sign of a bug elsewhere, so prominently flag
593 | null non_deletees = act
595 putMsg dflags (text "WARNING - NOT deleting source files:" <+> hsep (map text non_deletees))
598 (non_deletees, deletees) = partition isHaskellUserSrcFilename fs
600 removeWith :: DynFlags -> (FilePath -> IO ()) -> FilePath -> IO ()
601 removeWith dflags remover f = remover f `IO.catch`
603 let msg = if isDoesNotExistError e
604 then ptext SLIT("Warning: deleting non-existent") <+> text f
605 else ptext SLIT("Warning: exception raised when deleting")
608 in debugTraceMsg dflags 2 msg
611 -----------------------------------------------------------------------------
612 -- Running an external program
614 runSomething :: DynFlags
615 -> String -- For -v message
616 -> String -- Command name (possibly a full path)
617 -- assumed already dos-ified
618 -> [Option] -- Arguments
619 -- runSomething will dos-ify them
622 runSomething dflags phase_name pgm args =
623 runSomethingFiltered dflags id phase_name pgm args Nothing
626 :: DynFlags -> (String->String) -> String -> String -> [Option]
627 -> Maybe [(String,String)] -> IO ()
629 runSomethingFiltered dflags filter_fn phase_name pgm args mb_env = do
630 let real_args = filter notNull (map showOpt args)
631 traceCmd dflags phase_name (unwords (pgm:real_args)) $ do
632 (exit_code, doesn'tExist) <-
634 rc <- builderMainLoop dflags filter_fn pgm real_args mb_env
636 ExitSuccess{} -> return (rc, False)
638 -- rawSystem returns (ExitFailure 127) if the exec failed for any
639 -- reason (eg. the program doesn't exist). This is the only clue
640 -- we have, but we need to report something to the user because in
641 -- the case of a missing program there will otherwise be no output
643 | n == 127 -> return (rc, True)
644 | otherwise -> return (rc, False))
645 -- Should 'rawSystem' generate an IO exception indicating that
646 -- 'pgm' couldn't be run rather than a funky return code, catch
647 -- this here (the win32 version does this, but it doesn't hurt
648 -- to test for this in general.)
650 if IO.isDoesNotExistError err
651 #if defined(mingw32_HOST_OS) && __GLASGOW_HASKELL__ < 604
652 -- the 'compat' version of rawSystem under mingw32 always
653 -- maps 'errno' to EINVAL to failure.
654 || case (ioeGetErrorType err ) of { InvalidArgument{} -> True ; _ -> False}
656 then return (ExitFailure 1, True)
658 case (doesn'tExist, exit_code) of
659 (True, _) -> throwDyn (InstallationError ("could not execute: " ++ pgm))
660 (_, ExitSuccess) -> return ()
661 _ -> throwDyn (PhaseFailed phase_name exit_code)
665 #if __GLASGOW_HASKELL__ < 603
666 builderMainLoop dflags filter_fn pgm real_args mb_env = do
667 rawSystem pgm real_args
669 builderMainLoop dflags filter_fn pgm real_args mb_env = do
671 (hStdIn, hStdOut, hStdErr, hProcess) <- runInteractiveProcess pgm real_args Nothing mb_env
673 -- and run a loop piping the output from the compiler to the log_action in DynFlags
674 hSetBuffering hStdOut LineBuffering
675 hSetBuffering hStdErr LineBuffering
676 forkIO (readerProc chan hStdOut filter_fn)
677 forkIO (readerProc chan hStdErr filter_fn)
678 rc <- loop chan hProcess 2 1 ExitSuccess
684 -- status starts at zero, and increments each time either
685 -- a reader process gets EOF, or the build proc exits. We wait
686 -- for all of these to happen (status==3).
687 -- ToDo: we should really have a contingency plan in case any of
688 -- the threads dies, such as a timeout.
689 loop chan hProcess 0 0 exitcode = return exitcode
690 loop chan hProcess t p exitcode = do
692 then getProcessExitCode hProcess
695 Just code -> loop chan hProcess t (p-1) code
701 log_action dflags SevInfo noSrcSpan defaultUserStyle msg
702 loop chan hProcess t p exitcode
703 BuildError loc msg -> do
704 log_action dflags SevError (mkSrcSpan loc loc) defaultUserStyle msg
705 loop chan hProcess t p exitcode
707 loop chan hProcess (t-1) p exitcode
708 | otherwise -> loop chan hProcess t p exitcode
710 readerProc chan hdl filter_fn =
711 (do str <- hGetContents hdl
712 loop (linesPlatform (filter_fn str)) Nothing)
715 -- ToDo: check errors more carefully
716 -- ToDo: in the future, the filter should be implemented as
717 -- a stream transformer.
719 loop [] Nothing = return ()
720 loop [] (Just err) = writeChan chan err
723 Just err@(BuildError srcLoc msg)
724 | leading_whitespace l -> do
725 loop ls (Just (BuildError srcLoc (msg $$ text l)))
733 = case matchRegex errRegex l of
735 writeChan chan (BuildMsg (text l))
737 Just (file':lineno':colno':msg:_) -> do
738 let file = mkFastString file'
739 lineno = read lineno'::Int
740 colno = case colno' of
742 _ -> read (init colno') :: Int
743 srcLoc = mkSrcLoc file lineno colno
744 loop ls (Just (BuildError srcLoc (text msg)))
746 leading_whitespace [] = False
747 leading_whitespace (x:_) = isSpace x
749 errRegex = mkRegex "^([^:]*):([0-9]+):([0-9]+:)?(.*)"
753 | BuildError !SrcLoc !SDoc
757 showOpt (FileOption pre f) = pre ++ platformPath f
758 showOpt (Option "") = ""
759 showOpt (Option s) = s
761 traceCmd :: DynFlags -> String -> String -> IO () -> IO ()
762 -- a) trace the command (at two levels of verbosity)
763 -- b) don't do it at all if dry-run is set
764 traceCmd dflags phase_name cmd_line action
765 = do { let verb = verbosity dflags
766 ; showPass dflags phase_name
767 ; debugTraceMsg dflags 3 (text cmd_line)
771 ; unless (dopt Opt_DryRun dflags) $ do {
774 ; action `IO.catch` handle_exn verb
777 handle_exn verb exn = do { debugTraceMsg dflags 2 (char '\n')
778 ; debugTraceMsg dflags 2 (ptext SLIT("Failed:") <+> text cmd_line <+> text (show exn))
779 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
782 %************************************************************************
784 \subsection{Support code}
786 %************************************************************************
789 -----------------------------------------------------------------------------
790 -- Define getBaseDir :: IO (Maybe String)
792 getBaseDir :: IO (Maybe String)
793 #if defined(mingw32_HOST_OS)
794 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
795 -- return the path $(stuff). Note that we drop the "bin/" directory too.
796 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
797 buf <- mallocArray len
798 ret <- getModuleFileName nullPtr buf len
799 if ret == 0 then free buf >> return Nothing
800 else do s <- peekCString buf
802 return (Just (rootDir s))
804 rootDir s = reverse (dropList "/bin/ghc.exe" (reverse (normalisePath s)))
806 foreign import stdcall unsafe "GetModuleFileNameA"
807 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
809 getBaseDir = return Nothing
812 #ifdef mingw32_HOST_OS
813 foreign import ccall unsafe "_getpid" getProcessID :: IO Int -- relies on Int == Int32 on Windows
814 #elif __GLASGOW_HASKELL__ > 504
815 getProcessID :: IO Int
816 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
818 getProcessID :: IO Int
819 getProcessID = Posix.getProcessID
822 -- Divvy up text stream into lines, taking platform dependent
823 -- line termination into account.
824 linesPlatform :: String -> [String]
825 #if !defined(mingw32_HOST_OS)
826 linesPlatform ls = lines ls
828 linesPlatform "" = []
831 (as,xs1) -> as : linesPlatform xs1
833 lineBreak "" = ("","")
834 lineBreak ('\r':'\n':xs) = ([],xs)
835 lineBreak ('\n':xs) = ([],xs)
836 lineBreak (x:xs) = let (as,bs) = lineBreak xs in (x:as,bs)