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
27 -- Temporary-file management
30 cleanTempDirs, cleanTempFiles, cleanTempFilesExcept,
37 #include "HsVersions.h"
48 import Control.Exception
52 import System.Environment
54 import SYSTEM_IO_ERROR as IO
55 import System.Directory
60 #ifndef mingw32_HOST_OS
61 import qualified System.Posix.Internals
62 #else /* Must be Win32 */
64 import CString ( CString, peekCString )
67 #if __GLASGOW_HASKELL__ < 603
68 -- rawSystem comes from libghccompat.a in stage1
69 import Compat.RawSystem ( rawSystem )
70 import System.Cmd ( system )
71 import GHC.IOBase ( IOErrorType(..) )
73 import System.Process ( runInteractiveProcess, getProcessExitCode )
74 import Control.Concurrent( forkIO, newChan, readChan, writeChan )
75 import FastString ( mkFastString )
76 import SrcLoc ( SrcLoc, mkSrcLoc, noSrcSpan, mkSrcSpan )
81 The configuration story
82 ~~~~~~~~~~~~~~~~~~~~~~~
84 GHC needs various support files (library packages, RTS etc), plus
85 various auxiliary programs (cp, gcc, etc). It finds these in one
88 * When running as an *installed program*, GHC finds most of this support
89 stuff in the installed library tree. The path to this tree is passed
90 to GHC via the -B flag, and given to initSysTools .
92 * When running *in-place* in a build tree, GHC finds most of this support
93 stuff in the build tree. The path to the build tree is, again passed
96 GHC tells which of the two is the case by seeing whether package.conf
97 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
100 SysTools.initSysProgs figures out exactly where all the auxiliary programs
101 are, and initialises mutable variables to make it easy to call them.
102 To to this, it makes use of definitions in Config.hs, which is a Haskell
103 file containing variables whose value is figured out by the build system.
105 Config.hs contains two sorts of things
107 cGCC, The *names* of the programs
110 etc They do *not* include paths
113 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
114 cSPLIT_DIR_REL *relative* to the root of the build tree,
115 for use when running *in-place* in a build tree (only)
119 ---------------------------------------------
120 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
122 Another hair-brained scheme for simplifying the current tool location
123 nightmare in GHC: Simon originally suggested using another
124 configuration file along the lines of GCC's specs file - which is fine
125 except that it means adding code to read yet another configuration
126 file. What I didn't notice is that the current package.conf is
127 general enough to do this:
130 {name = "tools", import_dirs = [], source_dirs = [],
131 library_dirs = [], hs_libraries = [], extra_libraries = [],
132 include_dirs = [], c_includes = [], package_deps = [],
133 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${topdir}/bin/unlit", ... etc.],
134 extra_cc_opts = [], extra_ld_opts = []}
136 Which would have the advantage that we get to collect together in one
137 place the path-specific package stuff with the path-specific tool
140 ---------------------------------------------
142 %************************************************************************
144 \subsection{Initialisation}
146 %************************************************************************
149 initSysTools :: Maybe String -- Maybe TopDir path (without the '-B' prefix)
152 -> IO DynFlags -- Set all the mutable variables above, holding
153 -- (a) the system programs
154 -- (b) the package-config file
155 -- (c) the GHC usage message
158 initSysTools mbMinusB dflags
159 = do { (am_installed, top_dir) <- findTopDir mbMinusB
161 -- for "installed" this is the root of GHC's support files
162 -- for "in-place" it is the root of the build tree
163 -- NB: top_dir is assumed to be in standard Unix
164 -- format, '/' separated
166 ; let installed, installed_bin :: FilePath -> FilePath
167 installed_bin pgm = pgmPath top_dir pgm
168 installed file = pgmPath top_dir file
169 inplace dir pgm = pgmPath (top_dir `joinFileName`
170 cPROJECT_DIR `joinFileName` dir) pgm
173 | am_installed = installed "package.conf"
174 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
177 | am_installed = installed "ghc-usage.txt"
178 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
181 | am_installed = installed "ghci-usage.txt"
182 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghci-usage.txt"
184 -- For all systems, unlit, split, mangle are GHC utilities
185 -- architecture-specific stuff is done when building Config.hs
187 | am_installed = installed_bin cGHC_UNLIT_PGM
188 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
190 -- split and mangle are Perl scripts
192 | am_installed = installed_bin cGHC_SPLIT_PGM
193 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
196 | am_installed = installed_bin cGHC_MANGLER_PGM
197 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
199 ; let dflags0 = defaultDynFlags
200 #ifndef mingw32_HOST_OS
201 -- check whether TMPDIR is set in the environment
202 ; e_tmpdir <- IO.try (getEnv "TMPDIR") -- fails if not set
204 -- On Win32, consult GetTempPath() for a temp dir.
205 -- => it first tries TMP, TEMP, then finally the
206 -- Windows directory(!). The directory is in short-path
210 let len = (2048::Int)
211 buf <- mallocArray len
212 ret <- getTempPath len buf
214 -- failed, consult TMPDIR.
222 ; let dflags1 = case e_tmpdir of
224 Right d -> setTmpDir d dflags0
226 -- Check that the package config exists
227 ; config_exists <- doesFileExist pkgconfig_path
228 ; when (not config_exists) $
229 throwDyn (InstallationError
230 ("Can't find package.conf as " ++ pkgconfig_path))
232 #if defined(mingw32_HOST_OS)
233 -- WINDOWS-SPECIFIC STUFF
234 -- On Windows, gcc and friends are distributed with GHC,
235 -- so when "installed" we look in TopDir/bin
236 -- When "in-place" we look wherever the build-time configure
238 -- When "install" we tell gcc where its specs file + exes are (-B)
239 -- and also some places to pick up include files. We need
240 -- to be careful to put all necessary exes in the -B place
241 -- (as, ld, cc1, etc) since if they don't get found there, gcc
242 -- then tries to run unadorned "as", "ld", etc, and will
243 -- pick up whatever happens to be lying around in the path,
244 -- possibly including those from a cygwin install on the target,
245 -- which is exactly what we're trying to avoid.
246 ; let gcc_b_arg = Option ("-B" ++ installed "gcc-lib/")
248 | am_installed = (installed_bin "gcc", [gcc_b_arg])
249 | otherwise = (cGCC, [])
250 -- The trailing "/" is absolutely essential; gcc seems
251 -- to construct file names simply by concatenating to
252 -- this -B path with no extra slash We use "/" rather
253 -- than "\\" because otherwise "\\\" is mangled
254 -- later on; although gcc_args are in NATIVE format,
256 -- (see comments with declarations of global variables)
258 -- The quotes round the -B argument are in case TopDir
261 perl_path | am_installed = installed_bin cGHC_PERL
262 | otherwise = cGHC_PERL
264 -- 'touch' is a GHC util for Windows, and similarly unlit, mangle
265 ; let touch_path | am_installed = installed_bin cGHC_TOUCHY_PGM
266 | otherwise = inplace cGHC_TOUCHY_DIR_REL cGHC_TOUCHY_PGM
268 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
269 -- a call to Perl to get the invocation of split and mangle
270 ; let (split_prog, split_args) = (perl_path, [Option split_script])
271 (mangle_prog, mangle_args) = (perl_path, [Option mangle_script])
273 ; let (mkdll_prog, mkdll_args)
275 (pgmPath (installed "gcc-lib/") cMKDLL,
276 [ Option "--dlltool-name",
277 Option (pgmPath (installed "gcc-lib/") "dlltool"),
278 Option "--driver-name",
279 Option gcc_prog, gcc_b_arg ])
280 | otherwise = (cMKDLL, [])
282 -- UNIX-SPECIFIC STUFF
283 -- On Unix, the "standard" tools are assumed to be
284 -- in the same place whether we are running "in-place" or "installed"
285 -- That place is wherever the build-time configure script found them.
286 ; let gcc_prog = cGCC
289 mkdll_prog = panic "Can't build DLLs on a non-Win32 system"
292 -- On Unix, scripts are invoked using the '#!' method. Binary
293 -- installations of GHC on Unix place the correct line on the front
294 -- of the script at installation time, so we don't want to wire-in
295 -- our knowledge of $(PERL) on the host system here.
296 ; let (split_prog, split_args) = (split_script, [])
297 (mangle_prog, mangle_args) = (mangle_script, [])
300 -- cpp is derived from gcc on all platforms
301 -- HACK, see setPgmP below. We keep 'words' here to remember to fix
302 -- Config.hs one day.
303 ; let cpp_path = (gcc_prog, gcc_args ++
304 (Option "-E"):(map Option (words cRAWCPP_FLAGS)))
306 -- For all systems, copy and remove are provided by the host
307 -- system; architecture-specific stuff is done when building Config.hs
308 ; let cp_path = cGHC_CP
310 -- Other things being equal, as and ld are simply gcc
311 ; let (as_prog,as_args) = (gcc_prog,gcc_args)
312 (ld_prog,ld_args) = (gcc_prog,gcc_args)
315 ghcUsagePath = ghc_usage_msg_path,
316 ghciUsagePath = ghci_usage_msg_path,
318 systemPackageConfig = pkgconfig_path,
322 pgm_c = (gcc_prog,gcc_args),
323 pgm_m = (mangle_prog,mangle_args),
324 pgm_s = (split_prog,split_args),
325 pgm_a = (as_prog,as_args),
326 pgm_l = (ld_prog,ld_args),
327 pgm_dll = (mkdll_prog,mkdll_args),
329 pgm_sysman = top_dir ++ "/ghc/rts/parallel/SysMan"
330 -- Hans: this isn't right in general, but you can
331 -- elaborate it in the same way as the others
335 #if defined(mingw32_HOST_OS)
336 foreign import stdcall unsafe "GetTempPathA" getTempPath :: Int -> CString -> IO Int32
342 -- for "installed" this is the root of GHC's support files
343 -- for "in-place" it is the root of the build tree
346 -- 1. Set proto_top_dir
347 -- if there is no given TopDir path, get the directory
348 -- where GHC is running (only on Windows)
350 -- 2. If package.conf exists in proto_top_dir, we are running
351 -- installed; and TopDir = proto_top_dir
353 -- 3. Otherwise we are running in-place, so
354 -- proto_top_dir will be /...stuff.../ghc/compiler
355 -- Set TopDir to /...stuff..., which is the root of the build tree
357 -- This is very gruesome indeed
359 findTopDir :: Maybe String -- Maybe TopDir path (without the '-B' prefix).
360 -> IO (Bool, -- True <=> am installed, False <=> in-place
361 String) -- TopDir (in Unix format '/' separated)
364 = do { top_dir <- get_proto
365 -- Discover whether we're running in a build tree or in an installation,
366 -- by looking for the package configuration file.
367 ; am_installed <- doesFileExist (top_dir `joinFileName` "package.conf")
369 ; return (am_installed, top_dir)
372 -- get_proto returns a Unix-format path (relying on getBaseDir to do so too)
373 get_proto = case mbMinusB of
374 Just minusb -> return (normalisePath minusb)
376 -> do maybe_exec_dir <- getBaseDir -- Get directory of executable
377 case maybe_exec_dir of -- (only works on Windows;
378 -- returns Nothing on Unix)
379 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
380 Just dir -> return dir
384 %************************************************************************
386 \subsection{Running an external program}
388 %************************************************************************
392 runUnlit :: DynFlags -> [Option] -> IO ()
393 runUnlit dflags args = do
395 runSomething dflags "Literate pre-processor" p args
397 runCpp :: DynFlags -> [Option] -> IO ()
398 runCpp dflags args = do
399 let (p,args0) = pgm_P dflags
400 runSomething dflags "C pre-processor" p (args0 ++ args)
402 runPp :: DynFlags -> [Option] -> IO ()
403 runPp dflags args = do
405 runSomething dflags "Haskell pre-processor" p args
407 runCc :: DynFlags -> [Option] -> IO ()
408 runCc dflags args = do
409 let (p,args0) = pgm_c dflags
410 args1 = args0 ++ args
411 mb_env <- getGccEnv args1
412 runSomethingFiltered dflags cc_filter "C Compiler" p args1 mb_env
414 -- discard some harmless warnings from gcc that we can't turn off
415 cc_filter = unlines . doFilter . lines
418 gcc gives warnings in chunks like so:
419 In file included from /foo/bar/baz.h:11,
420 from /foo/bar/baz2.h:22,
422 /foo/flibble:14: global register variable ...
423 /foo/flibble:15: warning: call-clobbered r...
424 We break it up into its chunks, remove any call-clobbered register
425 warnings from each chunk, and then delete any chunks that we have
428 doFilter = unChunkWarnings . filterWarnings . chunkWarnings []
429 -- We can't assume that the output will start with an "In file inc..."
430 -- line, so we start off expecting a list of warnings rather than a
432 chunkWarnings :: [String] -- The location stack to use for the next
434 -> [String] -- The remaining lines to look at
435 -> [([String], [String])]
436 chunkWarnings loc_stack [] = [(loc_stack, [])]
437 chunkWarnings loc_stack xs
438 = case break loc_stack_start xs of
439 (warnings, lss:xs') ->
440 case span loc_start_continuation xs' of
442 (loc_stack, warnings) : chunkWarnings (lss : lsc) xs''
443 _ -> [(loc_stack, xs)]
445 filterWarnings :: [([String], [String])] -> [([String], [String])]
446 filterWarnings [] = []
447 -- If the warnings are already empty then we are probably doing
448 -- something wrong, so don't delete anything
449 filterWarnings ((xs, []) : zs) = (xs, []) : filterWarnings zs
450 filterWarnings ((xs, ys) : zs) = case filter wantedWarning ys of
451 [] -> filterWarnings zs
452 ys' -> (xs, ys') : filterWarnings zs
454 unChunkWarnings :: [([String], [String])] -> [String]
455 unChunkWarnings [] = []
456 unChunkWarnings ((xs, ys) : zs) = xs ++ ys ++ unChunkWarnings zs
458 loc_stack_start s = "In file included from " `isPrefixOf` s
459 loc_start_continuation s = " from " `isPrefixOf` s
461 | "warning: call-clobbered register used" `isContainedIn` w = False
464 isContainedIn :: String -> String -> Bool
465 xs `isContainedIn` ys = any (xs `isPrefixOf`) (tails ys)
467 -- If the -B<dir> option is set, add <dir> to PATH. This works around
468 -- a bug in gcc on Windows Vista where it can't find its auxiliary
469 -- binaries (see bug #1110).
470 getGccEnv :: [Option] -> IO (Maybe [(String,String)])
472 #if __GLASGOW_HASKELL__ < 603
477 else do env <- getEnvironment
478 return (Just (map mangle_path env))
480 (b_dirs, _) = partitionWith get_b_opt opts
482 get_b_opt (Option ('-':'B':dir)) = Left dir
483 get_b_opt other = Right other
485 mangle_path (path,paths) | map toUpper path == "PATH"
486 = (path, '\"' : head b_dirs ++ "\";" ++ paths)
487 mangle_path other = other
490 runMangle :: DynFlags -> [Option] -> IO ()
491 runMangle dflags args = do
492 let (p,args0) = pgm_m dflags
493 runSomething dflags "Mangler" p (args0++args)
495 runSplit :: DynFlags -> [Option] -> IO ()
496 runSplit dflags args = do
497 let (p,args0) = pgm_s dflags
498 runSomething dflags "Splitter" p (args0++args)
500 runAs :: DynFlags -> [Option] -> IO ()
501 runAs dflags args = do
502 let (p,args0) = pgm_a dflags
503 args1 = args0 ++ args
504 mb_env <- getGccEnv args1
505 runSomethingFiltered dflags id "Assembler" p args1 mb_env
507 runLink :: DynFlags -> [Option] -> IO ()
508 runLink dflags args = do
509 let (p,args0) = pgm_l dflags
510 args1 = args0 ++ args
511 mb_env <- getGccEnv args1
512 runSomethingFiltered dflags id "Linker" p args1 mb_env
514 runMkDLL :: DynFlags -> [Option] -> IO ()
515 runMkDLL dflags args = do
516 let (p,args0) = pgm_dll dflags
517 args1 = args0 ++ args
518 mb_env <- getGccEnv (args0++args)
519 runSomethingFiltered dflags id "Make DLL" p args1 mb_env
521 touch :: DynFlags -> String -> String -> IO ()
522 touch dflags purpose arg =
523 runSomething dflags purpose (pgm_T dflags) [FileOption "" arg]
525 copy :: DynFlags -> String -> FilePath -> FilePath -> IO ()
526 copy dflags purpose from to = copyWithHeader dflags purpose Nothing from to
528 copyWithHeader :: DynFlags -> String -> Maybe String -> FilePath -> FilePath
530 copyWithHeader dflags purpose maybe_header from to = do
531 showPass dflags purpose
533 h <- openFile to WriteMode
534 ls <- readFile from -- inefficient, but it'll do for now.
535 -- ToDo: speed up via slurping.
536 maybe (return ()) (hPutStr h) maybe_header
540 getExtraViaCOpts :: DynFlags -> IO [String]
541 getExtraViaCOpts dflags = do
542 f <- readFile (topDir dflags `joinFileName` "extra-gcc-opts")
546 %************************************************************************
548 \subsection{Managing temporary files
550 %************************************************************************
553 GLOBAL_VAR(v_FilesToClean, [], [String] )
554 GLOBAL_VAR(v_DirsToClean, emptyFM, FiniteMap FilePath FilePath )
558 cleanTempDirs :: DynFlags -> IO ()
560 = unless (dopt Opt_KeepTmpFiles dflags)
561 $ do ds <- readIORef v_DirsToClean
562 removeTmpDirs dflags (eltsFM ds)
563 writeIORef v_DirsToClean emptyFM
565 cleanTempFiles :: DynFlags -> IO ()
566 cleanTempFiles dflags
567 = unless (dopt Opt_KeepTmpFiles dflags)
568 $ do fs <- readIORef v_FilesToClean
569 removeTmpFiles dflags fs
570 writeIORef v_FilesToClean []
572 cleanTempFilesExcept :: DynFlags -> [FilePath] -> IO ()
573 cleanTempFilesExcept dflags dont_delete
574 = unless (dopt Opt_KeepTmpFiles dflags)
575 $ do files <- readIORef v_FilesToClean
576 let (to_keep, to_delete) = partition (`elem` dont_delete) files
577 removeTmpFiles dflags to_delete
578 writeIORef v_FilesToClean to_keep
581 -- find a temporary name that doesn't already exist.
582 newTempName :: DynFlags -> Suffix -> IO FilePath
583 newTempName dflags extn
584 = do d <- getTempDir dflags
586 findTempName (d ++ "/ghc" ++ show x ++ "_") 0
588 findTempName :: FilePath -> Integer -> IO FilePath
589 findTempName prefix x
590 = do let filename = (prefix ++ show x) `joinFileExt` extn
591 b <- doesFileExist filename
592 if b then findTempName prefix (x+1)
593 else do consIORef v_FilesToClean filename -- clean it up later
596 -- return our temporary directory within tmp_dir, creating one if we
597 -- don't have one yet
598 getTempDir :: DynFlags -> IO FilePath
599 getTempDir dflags@(DynFlags{tmpDir=tmp_dir})
600 = do mapping <- readIORef v_DirsToClean
601 case lookupFM mapping tmp_dir of
604 let prefix = tmp_dir ++ "/ghc" ++ show x ++ "_"
606 mkTempDir :: Integer -> IO FilePath
608 = let dirname = prefix ++ show x
609 in do createDirectory dirname
610 let mapping' = addToFM mapping tmp_dir dirname
611 writeIORef v_DirsToClean mapping'
612 debugTraceMsg dflags 2 (ptext SLIT("Created temporary directory:") <+> text dirname)
615 if isAlreadyExistsError e
621 addFilesToClean :: [FilePath] -> IO ()
622 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
623 addFilesToClean files = mapM_ (consIORef v_FilesToClean) files
625 removeTmpDirs :: DynFlags -> [FilePath] -> IO ()
626 removeTmpDirs dflags ds
627 = traceCmd dflags "Deleting temp dirs"
628 ("Deleting: " ++ unwords ds)
629 (mapM_ (removeWith dflags removeDirectory) ds)
631 removeTmpFiles :: DynFlags -> [FilePath] -> IO ()
632 removeTmpFiles dflags fs
634 traceCmd dflags "Deleting temp files"
635 ("Deleting: " ++ unwords deletees)
636 (mapM_ (removeWith dflags removeFile) deletees)
638 -- Flat out refuse to delete files that are likely to be source input
639 -- files (is there a worse bug than having a compiler delete your source
642 -- Deleting source files is a sign of a bug elsewhere, so prominently flag
645 | null non_deletees = act
647 putMsg dflags (text "WARNING - NOT deleting source files:" <+> hsep (map text non_deletees))
650 (non_deletees, deletees) = partition isHaskellUserSrcFilename fs
652 removeWith :: DynFlags -> (FilePath -> IO ()) -> FilePath -> IO ()
653 removeWith dflags remover f = remover f `IO.catch`
655 let msg = if isDoesNotExistError e
656 then ptext SLIT("Warning: deleting non-existent") <+> text f
657 else ptext SLIT("Warning: exception raised when deleting")
660 in debugTraceMsg dflags 2 msg
663 -----------------------------------------------------------------------------
664 -- Running an external program
666 runSomething :: DynFlags
667 -> String -- For -v message
668 -> String -- Command name (possibly a full path)
669 -- assumed already dos-ified
670 -> [Option] -- Arguments
671 -- runSomething will dos-ify them
674 runSomething dflags phase_name pgm args =
675 runSomethingFiltered dflags id phase_name pgm args Nothing
678 :: DynFlags -> (String->String) -> String -> String -> [Option]
679 -> Maybe [(String,String)] -> IO ()
681 runSomethingFiltered dflags filter_fn phase_name pgm args mb_env = do
682 let real_args = filter notNull (map showOpt args)
683 traceCmd dflags phase_name (unwords (pgm:real_args)) $ do
684 (exit_code, doesn'tExist) <-
686 rc <- builderMainLoop dflags filter_fn pgm real_args mb_env
688 ExitSuccess{} -> return (rc, False)
690 -- rawSystem returns (ExitFailure 127) if the exec failed for any
691 -- reason (eg. the program doesn't exist). This is the only clue
692 -- we have, but we need to report something to the user because in
693 -- the case of a missing program there will otherwise be no output
695 | n == 127 -> return (rc, True)
696 | otherwise -> return (rc, False))
697 -- Should 'rawSystem' generate an IO exception indicating that
698 -- 'pgm' couldn't be run rather than a funky return code, catch
699 -- this here (the win32 version does this, but it doesn't hurt
700 -- to test for this in general.)
702 if IO.isDoesNotExistError err
703 #if defined(mingw32_HOST_OS) && __GLASGOW_HASKELL__ < 604
704 -- the 'compat' version of rawSystem under mingw32 always
705 -- maps 'errno' to EINVAL to failure.
706 || case (ioeGetErrorType err ) of { InvalidArgument{} -> True ; _ -> False}
708 then return (ExitFailure 1, True)
710 case (doesn'tExist, exit_code) of
711 (True, _) -> throwDyn (InstallationError ("could not execute: " ++ pgm))
712 (_, ExitSuccess) -> return ()
713 _ -> throwDyn (PhaseFailed phase_name exit_code)
717 #if __GLASGOW_HASKELL__ < 603
718 builderMainLoop dflags filter_fn pgm real_args mb_env = do
719 rawSystem pgm real_args
721 builderMainLoop dflags filter_fn pgm real_args mb_env = do
723 (hStdIn, hStdOut, hStdErr, hProcess) <- runInteractiveProcess pgm real_args Nothing mb_env
725 -- and run a loop piping the output from the compiler to the log_action in DynFlags
726 hSetBuffering hStdOut LineBuffering
727 hSetBuffering hStdErr LineBuffering
728 forkIO (readerProc chan hStdOut filter_fn)
729 forkIO (readerProc chan hStdErr filter_fn)
730 -- we don't want to finish until 2 streams have been completed
731 -- (stdout and stderr)
732 -- nor until 1 exit code has been retrieved.
733 rc <- loop chan hProcess (2::Integer) (1::Integer) ExitSuccess
734 -- after that, we're done here.
740 -- status starts at zero, and increments each time either
741 -- a reader process gets EOF, or the build proc exits. We wait
742 -- for all of these to happen (status==3).
743 -- ToDo: we should really have a contingency plan in case any of
744 -- the threads dies, such as a timeout.
745 loop chan hProcess 0 0 exitcode = return exitcode
746 loop chan hProcess t p exitcode = do
748 then getProcessExitCode hProcess
751 Just code -> loop chan hProcess t (p-1) code
757 log_action dflags SevInfo noSrcSpan defaultUserStyle msg
758 loop chan hProcess t p exitcode
759 BuildError loc msg -> do
760 log_action dflags SevError (mkSrcSpan loc loc) defaultUserStyle msg
761 loop chan hProcess t p exitcode
763 loop chan hProcess (t-1) p exitcode
764 | otherwise -> loop chan hProcess t p exitcode
766 readerProc chan hdl filter_fn =
767 (do str <- hGetContents hdl
768 loop (linesPlatform (filter_fn str)) Nothing)
771 -- ToDo: check errors more carefully
772 -- ToDo: in the future, the filter should be implemented as
773 -- a stream transformer.
775 loop [] Nothing = return ()
776 loop [] (Just err) = writeChan chan err
779 Just err@(BuildError srcLoc msg)
780 | leading_whitespace l -> do
781 loop ls (Just (BuildError srcLoc (msg $$ text l)))
789 = case parseError l of
791 writeChan chan (BuildMsg (text l))
793 Just (file, lineNum, colNum, msg) -> do
794 let srcLoc = mkSrcLoc (mkFastString file) lineNum colNum
795 loop ls (Just (BuildError srcLoc (text msg)))
797 leading_whitespace [] = False
798 leading_whitespace (x:_) = isSpace x
800 parseError :: String -> Maybe (String, Int, Int, String)
801 parseError s0 = case breakColon s0 of
802 Just (filename, s1) ->
803 case breakIntColon s1 of
804 Just (lineNum, s2) ->
805 case breakIntColon s2 of
806 Just (columnNum, s3) ->
807 Just (filename, lineNum, columnNum, s3)
809 Just (filename, lineNum, 0, s2)
813 breakColon :: String -> Maybe (String, String)
814 breakColon xs = case break (':' ==) xs of
815 (ys, _:zs) -> Just (ys, zs)
818 breakIntColon :: String -> Maybe (Int, String)
819 breakIntColon xs = case break (':' ==) xs of
821 | not (null ys) && all isAscii ys && all isDigit ys ->
827 | BuildError !SrcLoc !SDoc
831 showOpt (FileOption pre f) = pre ++ platformPath f
832 showOpt (Option "") = ""
833 showOpt (Option s) = s
835 traceCmd :: DynFlags -> String -> String -> IO () -> IO ()
836 -- a) trace the command (at two levels of verbosity)
837 -- b) don't do it at all if dry-run is set
838 traceCmd dflags phase_name cmd_line action
839 = do { let verb = verbosity dflags
840 ; showPass dflags phase_name
841 ; debugTraceMsg dflags 3 (text cmd_line)
845 ; unless (dopt Opt_DryRun dflags) $ do {
848 ; action `IO.catch` handle_exn verb
851 handle_exn verb exn = do { debugTraceMsg dflags 2 (char '\n')
852 ; debugTraceMsg dflags 2 (ptext SLIT("Failed:") <+> text cmd_line <+> text (show exn))
853 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
856 %************************************************************************
858 \subsection{Support code}
860 %************************************************************************
863 -----------------------------------------------------------------------------
864 -- Define getBaseDir :: IO (Maybe String)
866 getBaseDir :: IO (Maybe String)
867 #if defined(mingw32_HOST_OS)
868 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
869 -- return the path $(stuff). Note that we drop the "bin/" directory too.
870 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
871 buf <- mallocArray len
872 ret <- getModuleFileName nullPtr buf len
873 if ret == 0 then free buf >> return Nothing
874 else do s <- peekCString buf
876 return (Just (rootDir s))
878 rootDir s = reverse (dropList "/bin/ghc.exe" (reverse (normalisePath s)))
880 foreign import stdcall unsafe "GetModuleFileNameA"
881 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
883 getBaseDir = return Nothing
886 #ifdef mingw32_HOST_OS
887 foreign import ccall unsafe "_getpid" getProcessID :: IO Int -- relies on Int == Int32 on Windows
889 getProcessID :: IO Int
890 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
893 -- Divvy up text stream into lines, taking platform dependent
894 -- line termination into account.
895 linesPlatform :: String -> [String]
896 #if !defined(mingw32_HOST_OS)
897 linesPlatform ls = lines ls
899 linesPlatform "" = []
902 (as,xs1) -> as : linesPlatform xs1
904 lineBreak "" = ("","")
905 lineBreak ('\r':'\n':xs) = ([],xs)
906 lineBreak ('\n':xs) = ([],xs)
907 lineBreak (x:xs) = let (as,bs) = lineBreak xs in (x:as,bs)