1 -----------------------------------------------------------------------------
3 -- (c) The University of Glasgow 2001-2003
5 -- Access to system tools: gcc, cp, rm etc
7 -----------------------------------------------------------------------------
14 setPgmL, -- String -> IO ()
27 -- Command-line override
30 getTopDir, -- IO String -- The value of $libdir
31 getPackageConfigPath, -- IO String -- Where package.conf is
32 getUsageMsgPaths, -- IO (String,String)
34 -- Interface to system tools
35 runUnlit, runCpp, runCc, -- [Option] -> IO ()
36 runPp, -- [Option] -> IO ()
37 runMangle, runSplit, -- [Option] -> IO ()
38 runAs, runLink, -- [Option] -> IO ()
41 runIlx2il, runIlasm, -- [String] -> IO ()
45 touch, -- String -> String -> IO ()
46 copy, -- String -> String -> String -> IO ()
47 normalisePath, -- FilePath -> FilePath
49 -- Temporary-file management
52 cleanTempFiles, cleanTempFilesExcept,
56 system, -- String -> IO ExitCode
59 getSysMan, -- IO String Parallel system only
65 #include "HsVersions.h"
68 import DriverPhases ( isHaskellUserSrcFilename )
71 import Panic ( GhcException(..) )
72 import Util ( global, notNull, toArgs )
73 import CmdLineOpts ( dynFlag, verbosity )
75 import EXCEPTION ( throwDyn )
76 import DATA_IOREF ( IORef, readIORef, writeIORef )
79 import Monad ( when, unless )
80 import System ( ExitCode(..), getEnv, system )
81 import IO ( try, catch,
82 openFile, hPutStrLn, hPutStr, hClose, hFlush, IOMode(..),
84 import Directory ( doesFileExist, removeFile )
85 import List ( partition )
87 #include "../includes/ghcconfig.h"
89 -- GHC <= 4.08 didn't have rawSystem, and runs into problems with long command
90 -- lines on mingw32, so we disallow it now.
91 #if __GLASGOW_HASKELL__ < 500
92 #error GHC >= 5.00 is required for bootstrapping GHC
95 #ifndef mingw32_HOST_OS
96 #if __GLASGOW_HASKELL__ > 504
97 import qualified System.Posix.Internals
99 import qualified Posix
101 #else /* Must be Win32 */
102 import List ( isPrefixOf )
103 import Util ( dropList )
105 import CString ( CString, peekCString )
108 #if __GLASGOW_HASKELL__ < 603
109 import Foreign ( withMany, withArray0, nullPtr, Ptr )
110 import CForeign ( CString, withCString, throwErrnoIfMinus1 )
112 import System.Cmd ( rawSystem )
117 The configuration story
118 ~~~~~~~~~~~~~~~~~~~~~~~
120 GHC needs various support files (library packages, RTS etc), plus
121 various auxiliary programs (cp, gcc, etc). It finds these in one
124 * When running as an *installed program*, GHC finds most of this support
125 stuff in the installed library tree. The path to this tree is passed
126 to GHC via the -B flag, and given to initSysTools .
128 * When running *in-place* in a build tree, GHC finds most of this support
129 stuff in the build tree. The path to the build tree is, again passed
132 GHC tells which of the two is the case by seeing whether package.conf
133 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
136 SysTools.initSysProgs figures out exactly where all the auxiliary programs
137 are, and initialises mutable variables to make it easy to call them.
138 To to this, it makes use of definitions in Config.hs, which is a Haskell
139 file containing variables whose value is figured out by the build system.
141 Config.hs contains two sorts of things
143 cGCC, The *names* of the programs
146 etc They do *not* include paths
149 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
150 cSPLIT_DIR_REL *relative* to the root of the build tree,
151 for use when running *in-place* in a build tree (only)
155 ---------------------------------------------
156 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
158 Another hair-brained scheme for simplifying the current tool location
159 nightmare in GHC: Simon originally suggested using another
160 configuration file along the lines of GCC's specs file - which is fine
161 except that it means adding code to read yet another configuration
162 file. What I didn't notice is that the current package.conf is
163 general enough to do this:
166 {name = "tools", import_dirs = [], source_dirs = [],
167 library_dirs = [], hs_libraries = [], extra_libraries = [],
168 include_dirs = [], c_includes = [], package_deps = [],
169 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${libdir}/bin/unlit", ... etc.],
170 extra_cc_opts = [], extra_ld_opts = []}
172 Which would have the advantage that we get to collect together in one
173 place the path-specific package stuff with the path-specific tool
176 ---------------------------------------------
179 %************************************************************************
181 \subsection{Global variables to contain system programs}
183 %************************************************************************
185 All these pathnames are maintained IN THE NATIVE FORMAT OF THE HOST MACHINE.
186 (See remarks under pathnames below)
189 GLOBAL_VAR(v_Pgm_L, error "pgm_L", String) -- unlit
190 GLOBAL_VAR(v_Pgm_P, error "pgm_P", (String,[Option])) -- cpp
191 GLOBAL_VAR(v_Pgm_F, error "pgm_F", String) -- pp
192 GLOBAL_VAR(v_Pgm_c, error "pgm_c", (String,[Option])) -- gcc
193 GLOBAL_VAR(v_Pgm_m, error "pgm_m", (String,[Option])) -- asm code mangler
194 GLOBAL_VAR(v_Pgm_s, error "pgm_s", (String,[Option])) -- asm code splitter
195 GLOBAL_VAR(v_Pgm_a, error "pgm_a", (String,[Option])) -- as
197 GLOBAL_VAR(v_Pgm_I, error "pgm_I", String) -- ilx2il
198 GLOBAL_VAR(v_Pgm_i, error "pgm_i", String) -- ilasm
200 GLOBAL_VAR(v_Pgm_l, error "pgm_l", (String,[Option])) -- ld
201 GLOBAL_VAR(v_Pgm_MkDLL, error "pgm_dll", (String,[Option])) -- mkdll
203 GLOBAL_VAR(v_Pgm_T, error "pgm_T", String) -- touch
204 GLOBAL_VAR(v_Pgm_CP, error "pgm_CP", String) -- cp
206 GLOBAL_VAR(v_Path_package_config, error "path_package_config", String)
207 GLOBAL_VAR(v_Path_usages, error "ghc_usage.txt", (String,String))
209 GLOBAL_VAR(v_TopDir, error "TopDir", String) -- -B<dir>
211 -- Parallel system only
212 GLOBAL_VAR(v_Pgm_sysman, error "pgm_sysman", String) -- system manager
214 -- ways to get at some of these variables from outside this module
215 getPackageConfigPath = readIORef v_Path_package_config
216 getTopDir = readIORef v_TopDir
220 %************************************************************************
222 \subsection{Initialisation}
224 %************************************************************************
227 initSysTools :: [String] -- Command-line arguments starting "-B"
229 -> IO () -- Set all the mutable variables above, holding
230 -- (a) the system programs
231 -- (b) the package-config file
232 -- (c) the GHC usage message
235 initSysTools minusB_args
236 = do { (am_installed, top_dir) <- findTopDir minusB_args
237 ; writeIORef v_TopDir top_dir
239 -- for "installed" this is the root of GHC's support files
240 -- for "in-place" it is the root of the build tree
241 -- NB: top_dir is assumed to be in standard Unix format '/' separated
243 ; let installed, installed_bin :: FilePath -> FilePath
244 installed_bin pgm = pgmPath top_dir pgm
245 installed file = pgmPath top_dir file
246 inplace dir pgm = pgmPath (top_dir `slash`
247 cPROJECT_DIR `slash` dir) pgm
250 | am_installed = installed "package.conf"
251 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
254 | am_installed = installed "ghc-usage.txt"
255 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
258 | am_installed = installed "ghci-usage.txt"
259 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghci-usage.txt"
261 -- For all systems, unlit, split, mangle are GHC utilities
262 -- architecture-specific stuff is done when building Config.hs
264 | am_installed = installed_bin cGHC_UNLIT_PGM
265 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
267 -- split and mangle are Perl scripts
269 | am_installed = installed_bin cGHC_SPLIT_PGM
270 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
273 | am_installed = installed_bin cGHC_MANGLER_PGM
274 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
276 #ifndef mingw32_HOST_OS
277 -- check whether TMPDIR is set in the environment
278 ; IO.try (do dir <- getEnv "TMPDIR" -- fails if not set
283 -- On Win32, consult GetTempPath() for a temp dir.
284 -- => it first tries TMP, TEMP, then finally the
285 -- Windows directory(!). The directory is in short-path
288 let len = (2048::Int)
289 buf <- mallocArray len
290 ret <- getTempPath len buf
293 -- failed, consult TMPDIR.
303 -- Check that the package config exists
304 ; config_exists <- doesFileExist pkgconfig_path
305 ; when (not config_exists) $
306 throwDyn (InstallationError
307 ("Can't find package.conf as " ++ pkgconfig_path))
309 #if defined(mingw32_HOST_OS)
310 -- WINDOWS-SPECIFIC STUFF
311 -- On Windows, gcc and friends are distributed with GHC,
312 -- so when "installed" we look in TopDir/bin
313 -- When "in-place" we look wherever the build-time configure
315 -- When "install" we tell gcc where its specs file + exes are (-B)
316 -- and also some places to pick up include files. We need
317 -- to be careful to put all necessary exes in the -B place
318 -- (as, ld, cc1, etc) since if they don't get found there, gcc
319 -- then tries to run unadorned "as", "ld", etc, and will
320 -- pick up whatever happens to be lying around in the path,
321 -- possibly including those from a cygwin install on the target,
322 -- which is exactly what we're trying to avoid.
323 ; let gcc_b_arg = Option ("-B" ++ installed "gcc-lib/")
325 | am_installed = (installed_bin "gcc", [gcc_b_arg])
326 | otherwise = (cGCC, [])
327 -- The trailing "/" is absolutely essential; gcc seems
328 -- to construct file names simply by concatenating to
329 -- this -B path with no extra slash We use "/" rather
330 -- than "\\" because otherwise "\\\" is mangled
331 -- later on; although gcc_args are in NATIVE format,
333 -- (see comments with declarations of global variables)
335 -- The quotes round the -B argument are in case TopDir
338 perl_path | am_installed = installed_bin cGHC_PERL
339 | otherwise = cGHC_PERL
341 -- 'touch' is a GHC util for Windows, and similarly unlit, mangle
342 ; let touch_path | am_installed = installed_bin cGHC_TOUCHY_PGM
343 | otherwise = inplace cGHC_TOUCHY_DIR_REL cGHC_TOUCHY_PGM
345 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
346 -- a call to Perl to get the invocation of split and mangle
347 ; let (split_prog, split_args) = (perl_path, [Option split_script])
348 (mangle_prog, mangle_args) = (perl_path, [Option mangle_script])
350 ; let (mkdll_prog, mkdll_args)
352 (pgmPath (installed "gcc-lib/") cMKDLL,
353 [ Option "--dlltool-name",
354 Option (pgmPath (installed "gcc-lib/") "dlltool"),
355 Option "--driver-name",
356 Option gcc_prog, gcc_b_arg ])
357 | otherwise = (cMKDLL, [])
359 -- UNIX-SPECIFIC STUFF
360 -- On Unix, the "standard" tools are assumed to be
361 -- in the same place whether we are running "in-place" or "installed"
362 -- That place is wherever the build-time configure script found them.
363 ; let gcc_prog = cGCC
366 mkdll_prog = panic "Can't build DLLs on a non-Win32 system"
369 -- On Unix, scripts are invoked using the '#!' method. Binary
370 -- installations of GHC on Unix place the correct line on the front
371 -- of the script at installation time, so we don't want to wire-in
372 -- our knowledge of $(PERL) on the host system here.
373 ; let (split_prog, split_args) = (split_script, [])
374 (mangle_prog, mangle_args) = (mangle_script, [])
377 -- cpp is derived from gcc on all platforms
378 -- HACK, see setPgmP below. We keep 'words' here to remember to fix
379 -- Config.hs one day.
380 ; let cpp_path = (gcc_prog, gcc_args ++
381 (Option "-E"):(map Option (words cRAWCPP_FLAGS)))
383 -- For all systems, copy and remove are provided by the host
384 -- system; architecture-specific stuff is done when building Config.hs
385 ; let cp_path = cGHC_CP
387 -- Other things being equal, as and ld are simply gcc
388 ; let (as_prog,as_args) = (gcc_prog,gcc_args)
389 (ld_prog,ld_args) = (gcc_prog,gcc_args)
392 -- ilx2il and ilasm are specified in Config.hs
393 ; let ilx2il_path = cILX2IL
397 -- Initialise the global vars
398 ; writeIORef v_Path_package_config pkgconfig_path
399 ; writeIORef v_Path_usages (ghc_usage_msg_path,
402 ; writeIORef v_Pgm_sysman (top_dir ++ "/ghc/rts/parallel/SysMan")
403 -- Hans: this isn't right in general, but you can
404 -- elaborate it in the same way as the others
406 ; writeIORef v_Pgm_L unlit_path
407 ; writeIORef v_Pgm_P cpp_path
408 ; writeIORef v_Pgm_F ""
409 ; writeIORef v_Pgm_c (gcc_prog,gcc_args)
410 ; writeIORef v_Pgm_m (mangle_prog,mangle_args)
411 ; writeIORef v_Pgm_s (split_prog,split_args)
412 ; writeIORef v_Pgm_a (as_prog,as_args)
414 ; writeIORef v_Pgm_I ilx2il_path
415 ; writeIORef v_Pgm_i ilasm_path
417 ; writeIORef v_Pgm_l (ld_prog,ld_args)
418 ; writeIORef v_Pgm_MkDLL (mkdll_prog,mkdll_args)
419 ; writeIORef v_Pgm_T touch_path
420 ; writeIORef v_Pgm_CP cp_path
425 #if defined(mingw32_HOST_OS)
426 foreign import stdcall "GetTempPathA" unsafe getTempPath :: Int -> CString -> IO Int32
430 The various setPgm functions are called when a command-line option
435 is used to override a particular program with a new one
438 setPgmL = writeIORef v_Pgm_L
439 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
440 -- Config.hs should really use Option.
441 setPgmP arg = let (pgm:args) = words arg in writeIORef v_Pgm_P (pgm,map Option args)
442 setPgmF = writeIORef v_Pgm_F
443 setPgmc prog = writeIORef v_Pgm_c (prog,[])
444 setPgmm prog = writeIORef v_Pgm_m (prog,[])
445 setPgms prog = writeIORef v_Pgm_s (prog,[])
446 setPgma prog = writeIORef v_Pgm_a (prog,[])
447 setPgml prog = writeIORef v_Pgm_l (prog,[])
448 setPgmDLL prog = writeIORef v_Pgm_MkDLL (prog,[])
450 setPgmI = writeIORef v_Pgm_I
451 setPgmi = writeIORef v_Pgm_i
458 -- for "installed" this is the root of GHC's support files
459 -- for "in-place" it is the root of the build tree
462 -- 1. Set proto_top_dir
463 -- a) look for (the last) -B flag, and use it
464 -- b) if there are no -B flags, get the directory
465 -- where GHC is running (only on Windows)
467 -- 2. If package.conf exists in proto_top_dir, we are running
468 -- installed; and TopDir = proto_top_dir
470 -- 3. Otherwise we are running in-place, so
471 -- proto_top_dir will be /...stuff.../ghc/compiler
472 -- Set TopDir to /...stuff..., which is the root of the build tree
474 -- This is very gruesome indeed
476 findTopDir :: [String]
477 -> IO (Bool, -- True <=> am installed, False <=> in-place
478 String) -- TopDir (in Unix format '/' separated)
481 = do { top_dir <- get_proto
482 -- Discover whether we're running in a build tree or in an installation,
483 -- by looking for the package configuration file.
484 ; am_installed <- doesFileExist (top_dir `slash` "package.conf")
486 ; return (am_installed, top_dir)
489 -- get_proto returns a Unix-format path (relying on getBaseDir to do so too)
490 get_proto | notNull minusbs
491 = return (normalisePath (drop 2 (last minusbs))) -- 2 for "-B"
493 = do { maybe_exec_dir <- getBaseDir -- Get directory of executable
494 ; case maybe_exec_dir of -- (only works on Windows;
495 -- returns Nothing on Unix)
496 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
497 Just dir -> return dir
502 %************************************************************************
504 \subsection{Command-line options}
506 %************************************************************************
508 When invoking external tools as part of the compilation pipeline, we
509 pass these a sequence of options on the command-line. Rather than
510 just using a list of Strings, we use a type that allows us to distinguish
511 between filepaths and 'other stuff'. [The reason being, of course, that
512 this type gives us a handle on transforming filenames, and filenames only,
513 to whatever format they're expected to be on a particular platform.]
517 = FileOption -- an entry that _contains_ filename(s) / filepaths.
518 String -- a non-filepath prefix that shouldn't be transformed (e.g., "/out="
519 String -- the filepath/filename portion
522 showOpt (FileOption pre f) = pre ++ platformPath f
523 showOpt (Option "") = ""
524 showOpt (Option s) = s
529 %************************************************************************
531 \subsection{Running an external program}
533 %************************************************************************
537 runUnlit :: [Option] -> IO ()
538 runUnlit args = do p <- readIORef v_Pgm_L
539 runSomething "Literate pre-processor" p args
541 runCpp :: [Option] -> IO ()
542 runCpp args = do (p,baseArgs) <- readIORef v_Pgm_P
543 runSomething "C pre-processor" p (baseArgs ++ args)
545 runPp :: [Option] -> IO ()
546 runPp args = do p <- readIORef v_Pgm_F
547 runSomething "Haskell pre-processor" p args
549 runCc :: [Option] -> IO ()
550 runCc args = do (p,args0) <- readIORef v_Pgm_c
551 runSomething "C Compiler" p (args0++args)
553 runMangle :: [Option] -> IO ()
554 runMangle args = do (p,args0) <- readIORef v_Pgm_m
555 runSomething "Mangler" p (args0++args)
557 runSplit :: [Option] -> IO ()
558 runSplit args = do (p,args0) <- readIORef v_Pgm_s
559 runSomething "Splitter" p (args0++args)
561 runAs :: [Option] -> IO ()
562 runAs args = do (p,args0) <- readIORef v_Pgm_a
563 runSomething "Assembler" p (args0++args)
565 runLink :: [Option] -> IO ()
566 runLink args = do (p,args0) <- readIORef v_Pgm_l
567 runSomething "Linker" p (args0++args)
570 runIlx2il :: [Option] -> IO ()
571 runIlx2il args = do p <- readIORef v_Pgm_I
572 runSomething "Ilx2Il" p args
574 runIlasm :: [Option] -> IO ()
575 runIlasm args = do p <- readIORef v_Pgm_i
576 runSomething "Ilasm" p args
579 runMkDLL :: [Option] -> IO ()
580 runMkDLL args = do (p,args0) <- readIORef v_Pgm_MkDLL
581 runSomething "Make DLL" p (args0++args)
583 touch :: String -> String -> IO ()
584 touch purpose arg = do p <- readIORef v_Pgm_T
585 runSomething purpose p [FileOption "" arg]
587 copy :: String -> String -> String -> IO ()
588 copy purpose from to = do
589 verb <- dynFlag verbosity
590 when (verb >= 2) $ hPutStrLn stderr ("*** " ++ purpose)
592 h <- openFile to WriteMode
593 ls <- readFile from -- inefficient, but it'll do for now.
594 -- ToDo: speed up via slurping.
600 getSysMan :: IO String -- How to invoke the system manager
601 -- (parallel system only)
602 getSysMan = readIORef v_Pgm_sysman
606 getUsageMsgPaths :: IO (FilePath,FilePath)
607 -- the filenames of the usage messages (ghc, ghci)
608 getUsageMsgPaths = readIORef v_Path_usages
612 %************************************************************************
614 \subsection{Managing temporary files
616 %************************************************************************
619 GLOBAL_VAR(v_FilesToClean, [], [String] )
620 GLOBAL_VAR(v_TmpDir, cDEFAULT_TMPDIR, String )
621 -- v_TmpDir has no closing '/'
625 setTmpDir dir = writeIORef v_TmpDir (canonicalise dir)
627 #if !defined(mingw32_HOST_OS)
628 canonicalise p = normalisePath p
630 -- Canonicalisation of temp path under win32 is a bit more
631 -- involved: (a) strip trailing slash,
632 -- (b) normalise slashes
633 -- (c) just in case, if there is a prefix /cygdrive/x/, change to x:
635 canonicalise path = normalisePath (xltCygdrive (removeTrailingSlash path))
637 -- if we're operating under cygwin, and TMP/TEMP is of
638 -- the form "/cygdrive/drive/path", translate this to
639 -- "drive:/path" (as GHC isn't a cygwin app and doesn't
640 -- understand /cygdrive paths.)
642 | "/cygdrive/" `isPrefixOf` path =
643 case drop (length "/cygdrive/") path of
644 drive:xs@('/':_) -> drive:':':xs
648 -- strip the trailing backslash (awful, but we only do this once).
649 removeTrailingSlash path =
656 cleanTempFiles :: Int -> IO ()
658 = do fs <- readIORef v_FilesToClean
659 removeTmpFiles verb fs
660 writeIORef v_FilesToClean []
662 cleanTempFilesExcept :: Int -> [FilePath] -> IO ()
663 cleanTempFilesExcept verb dont_delete
664 = do files <- readIORef v_FilesToClean
665 let (to_keep, to_delete) = partition (`elem` dont_delete) files
666 removeTmpFiles verb to_delete
667 writeIORef v_FilesToClean to_keep
670 -- find a temporary name that doesn't already exist.
671 newTempName :: Suffix -> IO FilePath
673 = do x <- getProcessID
674 tmp_dir <- readIORef v_TmpDir
675 findTempName tmp_dir x
677 findTempName tmp_dir x
678 = do let filename = tmp_dir ++ "/ghc" ++ show x ++ '.':extn
679 b <- doesFileExist filename
680 if b then findTempName tmp_dir (x+1)
681 else do add v_FilesToClean filename -- clean it up later
684 addFilesToClean :: [FilePath] -> IO ()
685 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
686 addFilesToClean files = mapM_ (add v_FilesToClean) files
688 removeTmpFiles :: Int -> [FilePath] -> IO ()
689 removeTmpFiles verb fs
691 traceCmd "Deleting temp files"
692 ("Deleting: " ++ unwords deletees)
695 -- Flat out refuse to delete files that are likely to be source input
696 -- files (is there a worse bug than having a compiler delete your source
699 -- Deleting source files is a sign of a bug elsewhere, so prominently flag
702 | null non_deletees = act
704 hPutStrLn stderr ("WARNING - NOT deleting source files: " ++ unwords non_deletees)
707 (non_deletees, deletees) = partition isHaskellUserSrcFilename fs
709 rm f = removeFile f `IO.catch`
712 hPutStrLn stderr ("Warning: deleting non-existent " ++ f)
718 %************************************************************************
720 \subsection{Running a program}
722 %************************************************************************
725 GLOBAL_VAR(v_Dry_run, False, Bool)
728 setDryRun = writeIORef v_Dry_run True
730 -----------------------------------------------------------------------------
731 -- Running an external program
733 runSomething :: String -- For -v message
734 -> String -- Command name (possibly a full path)
735 -- assumed already dos-ified
736 -> [Option] -- Arguments
737 -- runSomething will dos-ify them
740 runSomething phase_name pgm args = do
741 let real_args = filter notNull (map showOpt args)
742 traceCmd phase_name (unwords (pgm:real_args)) $ do
743 exit_code <- rawSystem pgm real_args
744 if (exit_code /= ExitSuccess)
745 then throwDyn (PhaseFailed phase_name exit_code)
748 traceCmd :: String -> String -> IO () -> IO ()
749 -- a) trace the command (at two levels of verbosity)
750 -- b) don't do it at all if dry-run is set
751 traceCmd phase_name cmd_line action
752 = do { verb <- dynFlag verbosity
753 ; when (verb >= 2) $ hPutStrLn stderr ("*** " ++ phase_name)
754 ; when (verb >= 3) $ hPutStrLn stderr cmd_line
758 ; n <- readIORef v_Dry_run
762 ; action `IO.catch` handle_exn verb
765 handle_exn verb exn = do { when (verb >= 2) (hPutStr stderr "\n")
766 ; when (verb >= 3) (hPutStrLn stderr ("Failed: " ++ cmd_line ++ (show exn)))
767 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
769 -- -----------------------------------------------------------------------------
770 -- rawSystem: run an external command
772 -- In GHC 6.2.1 there's a correct implementation of rawSystem in the
773 -- library System.Cmd. If we are compiling with an earlier version of
774 -- GHC than this, we'd better have a copy of the correct implementation
777 #if __GLASGOW_HASKELL__ < 603
778 #include "../../libraries/base/System/RawSystem.hs-inc"
783 %************************************************************************
785 \subsection{Path names}
787 %************************************************************************
789 We maintain path names in Unix form ('/'-separated) right until
790 the last moment. On Windows we dos-ify them just before passing them
791 to the Windows command.
793 The alternative, of using '/' consistently on Unix and '\' on Windows,
794 proved quite awkward. There were a lot more calls to platformPath,
795 and even on Windows we might invoke a unix-like utility (eg 'sh'), which
796 interpreted a command line 'foo\baz' as 'foobaz'.
799 -----------------------------------------------------------------------------
800 -- Convert filepath into platform / MSDOS form.
802 normalisePath :: String -> String
803 -- Just changes '\' to '/'
805 pgmPath :: String -- Directory string in Unix format
806 -> String -- Program name with no directory separators
808 -> String -- Program invocation string in native format
812 #if defined(mingw32_HOST_OS)
813 --------------------- Windows version ------------------
814 normalisePath xs = subst '\\' '/' xs
815 platformPath p = subst '/' '\\' p
816 pgmPath dir pgm = platformPath dir ++ '\\' : pgm
818 subst a b ls = map (\ x -> if x == a then b else x) ls
820 --------------------- Non-Windows version --------------
821 normalisePath xs = xs
822 pgmPath dir pgm = dir ++ '/' : pgm
823 platformPath stuff = stuff
824 --------------------------------------------------------
830 -----------------------------------------------------------------------------
831 Path name construction
834 slash :: String -> String -> String
835 slash s1 s2 = s1 ++ ('/' : s2)
839 %************************************************************************
841 \subsection{Support code}
843 %************************************************************************
846 -----------------------------------------------------------------------------
847 -- Define getBaseDir :: IO (Maybe String)
849 #if defined(mingw32_HOST_OS)
850 getBaseDir :: IO (Maybe String)
851 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
852 -- return the path $(stuff). Note that we drop the "bin/" directory too.
853 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
854 buf <- mallocArray len
855 ret <- getModuleFileName nullPtr buf len
856 if ret == 0 then free buf >> return Nothing
857 else do s <- peekCString buf
859 return (Just (rootDir s))
861 rootDir s = reverse (dropList "/bin/ghc.exe" (reverse (normalisePath s)))
863 foreign import stdcall "GetModuleFileNameA" unsafe
864 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
866 getBaseDir :: IO (Maybe String) = do return Nothing
869 #ifdef mingw32_HOST_OS
870 foreign import ccall "_getpid" unsafe getProcessID :: IO Int -- relies on Int == Int32 on Windows
871 #elif __GLASGOW_HASKELL__ > 504
872 getProcessID :: IO Int
873 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
875 getProcessID :: IO Int
876 getProcessID = Posix.getProcessID