1 -----------------------------------------------------------------------------
3 -- (c) The University of Glasgow 2001
5 -- Access to system tools: gcc, cp, rm etc
7 -----------------------------------------------------------------------------
14 setPgmL, -- String -> IO ()
26 -- Command-line override
29 getTopDir, -- IO String -- The value of $libdir
30 getPackageConfigPath, -- IO String -- Where package.conf is
32 -- Interface to system tools
33 runUnlit, runCpp, runCc, -- [Option] -> IO ()
34 runPp, -- [Option] -> IO ()
35 runMangle, runSplit, -- [Option] -> IO ()
36 runAs, runLink, -- [Option] -> IO ()
39 runIlx2il, runIlasm, -- [String] -> IO ()
43 touch, -- String -> String -> IO ()
44 copy, -- String -> String -> String -> IO ()
45 unDosifyPath, -- String -> String
47 -- Temporary-file management
50 cleanTempFiles, cleanTempFilesExcept, removeTmpFiles,
54 getProcessID, -- IO Int
55 system, -- String -> IO ExitCode
58 showGhcUsage, -- IO () Shows usage message and exits
59 getSysMan, -- IO String Parallel system only
65 #include "HsVersions.h"
70 import Panic ( progName, GhcException(..) )
71 import Util ( global, notNull )
72 import CmdLineOpts ( dynFlag, verbosity )
74 import EXCEPTION ( throwDyn )
75 import DATA_IOREF ( IORef, readIORef, writeIORef )
78 import Monad ( when, unless )
79 import System ( ExitCode(..), exitWith, getEnv, system )
80 import IO ( try, catch,
81 openFile, hPutChar, hPutStrLn, hPutStr, hClose, hFlush, IOMode(..),
83 import Directory ( doesFileExist, removeFile )
85 #include "../includes/config.h"
87 -- GHC <= 4.08 didn't have rawSystem, and runs into problems with long command
88 -- lines on mingw32, so we disallow it now.
89 #if defined(mingw32_HOST_OS) && (__GLASGOW_HASKELL__ <= 408)
90 #error GHC <= 4.08 is not supported for bootstrapping GHC on i386-unknown-mingw32
93 #ifndef mingw32_HOST_OS
94 #if __GLASGOW_HASKELL__ > 504
95 import qualified System.Posix.Internals
97 import qualified Posix
99 #else /* Must be Win32 */
100 import List ( isPrefixOf )
101 import Util ( dropList )
103 import CString ( CString, peekCString )
106 #ifdef mingw32_HOST_OS
107 #if __GLASGOW_HASKELL__ > 504
108 import System.Cmd ( rawSystem )
110 import SystemExts ( rawSystem )
113 #else /* Not Win32 */
115 import System ( system )
120 The configuration story
121 ~~~~~~~~~~~~~~~~~~~~~~~
123 GHC needs various support files (library packages, RTS etc), plus
124 various auxiliary programs (cp, gcc, etc). It finds these in one
127 * When running as an *installed program*, GHC finds most of this support
128 stuff in the installed library tree. The path to this tree is passed
129 to GHC via the -B flag, and given to initSysTools .
131 * When running *in-place* in a build tree, GHC finds most of this support
132 stuff in the build tree. The path to the build tree is, again passed
135 GHC tells which of the two is the case by seeing whether package.conf
136 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
139 SysTools.initSysProgs figures out exactly where all the auxiliary programs
140 are, and initialises mutable variables to make it easy to call them.
141 To to this, it makes use of definitions in Config.hs, which is a Haskell
142 file containing variables whose value is figured out by the build system.
144 Config.hs contains two sorts of things
146 cGCC, The *names* of the programs
149 etc They do *not* include paths
152 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
153 cSPLIT_DIR_REL *relative* to the root of the build tree,
154 for use when running *in-place* in a build tree (only)
158 ---------------------------------------------
159 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
161 Another hair-brained scheme for simplifying the current tool location
162 nightmare in GHC: Simon originally suggested using another
163 configuration file along the lines of GCC's specs file - which is fine
164 except that it means adding code to read yet another configuration
165 file. What I didn't notice is that the current package.conf is
166 general enough to do this:
169 {name = "tools", import_dirs = [], source_dirs = [],
170 library_dirs = [], hs_libraries = [], extra_libraries = [],
171 include_dirs = [], c_includes = [], package_deps = [],
172 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${libdir}/bin/unlit", ... etc.],
173 extra_cc_opts = [], extra_ld_opts = []}
175 Which would have the advantage that we get to collect together in one
176 place the path-specific package stuff with the path-specific tool
179 ---------------------------------------------
182 %************************************************************************
184 \subsection{Global variables to contain system programs}
186 %************************************************************************
188 All these pathnames are maintained IN THE NATIVE FORMAT OF THE HOST MACHINE.
189 (See remarks under pathnames below)
192 GLOBAL_VAR(v_Pgm_L, error "pgm_L", String) -- unlit
193 GLOBAL_VAR(v_Pgm_P, error "pgm_P", String) -- cpp
194 GLOBAL_VAR(v_Pgm_F, error "pgm_F", String) -- pp
195 GLOBAL_VAR(v_Pgm_c, error "pgm_c", String) -- gcc
196 GLOBAL_VAR(v_Pgm_m, error "pgm_m", String) -- asm code mangler
197 GLOBAL_VAR(v_Pgm_s, error "pgm_s", String) -- asm code splitter
198 GLOBAL_VAR(v_Pgm_a, error "pgm_a", String) -- as
200 GLOBAL_VAR(v_Pgm_I, error "pgm_I", String) -- ilx2il
201 GLOBAL_VAR(v_Pgm_i, error "pgm_i", String) -- ilasm
203 GLOBAL_VAR(v_Pgm_l, error "pgm_l", String) -- ld
204 GLOBAL_VAR(v_Pgm_MkDLL, error "pgm_dll", String) -- mkdll
206 GLOBAL_VAR(v_Pgm_T, error "pgm_T", String) -- touch
207 GLOBAL_VAR(v_Pgm_CP, error "pgm_CP", String) -- cp
209 GLOBAL_VAR(v_Path_package_config, error "path_package_config", String)
210 GLOBAL_VAR(v_Path_usage, error "ghc_usage.txt", String)
212 GLOBAL_VAR(v_TopDir, error "TopDir", String) -- -B<dir>
214 -- Parallel system only
215 GLOBAL_VAR(v_Pgm_sysman, error "pgm_sysman", String) -- system manager
217 -- ways to get at some of these variables from outside this module
218 getPackageConfigPath = readIORef v_Path_package_config
219 getTopDir = readIORef v_TopDir
223 %************************************************************************
225 \subsection{Initialisation}
227 %************************************************************************
230 initSysTools :: [String] -- Command-line arguments starting "-B"
232 -> IO () -- Set all the mutable variables above, holding
233 -- (a) the system programs
234 -- (b) the package-config file
235 -- (c) the GHC usage message
238 initSysTools minusB_args
239 = do { (am_installed, top_dir) <- findTopDir minusB_args
240 ; writeIORef v_TopDir top_dir
242 -- for "installed" this is the root of GHC's support files
243 -- for "in-place" it is the root of the build tree
244 -- NB: top_dir is assumed to be in standard Unix format '/' separated
246 ; let installed, installed_bin :: FilePath -> FilePath
247 installed_bin pgm = pgmPath top_dir pgm
248 installed file = pgmPath top_dir file
249 inplace dir pgm = pgmPath (top_dir `slash`
250 cPROJECT_DIR `slash` dir) pgm
253 | am_installed = installed "package.conf"
254 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
257 | am_installed = installed "ghc-usage.txt"
258 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
260 -- For all systems, unlit, split, mangle are GHC utilities
261 -- architecture-specific stuff is done when building Config.hs
263 | am_installed = installed_bin cGHC_UNLIT_PGM
264 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
266 -- split and mangle are Perl scripts
268 | am_installed = installed_bin cGHC_SPLIT_PGM
269 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
272 | am_installed = installed_bin cGHC_MANGLER_PGM
273 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
275 #ifndef mingw32_HOST_OS
276 -- check whether TMPDIR is set in the environment
277 ; IO.try (do dir <- getEnv "TMPDIR" -- fails if not set
282 -- On Win32, consult GetTempPath() for a temp dir.
283 -- => it first tries TMP, TEMP, then finally the
284 -- Windows directory(!). The directory is in short-path
285 -- form and *does* have a trailing backslash.
287 let len = (2048::Int)
288 buf <- mallocArray len
289 ret <- getTempPath len buf
292 -- failed, consult TEMP.
300 -- strip the trailing backslash (awful, but
301 -- we only do this once).
311 -- Check that the package config exists
312 ; config_exists <- doesFileExist pkgconfig_path
313 ; when (not config_exists) $
314 throwDyn (InstallationError
315 ("Can't find package.conf as " ++ pkgconfig_path))
317 #if defined(mingw32_HOST_OS)
318 -- WINDOWS-SPECIFIC STUFF
319 -- On Windows, gcc and friends are distributed with GHC,
320 -- so when "installed" we look in TopDir/bin
321 -- When "in-place" we look wherever the build-time configure
323 -- When "install" we tell gcc where its specs file + exes are (-B)
324 -- and also some places to pick up include files. We need
325 -- to be careful to put all necessary exes in the -B place
326 -- (as, ld, cc1, etc) since if they don't get found there, gcc
327 -- then tries to run unadorned "as", "ld", etc, and will
328 -- pick up whatever happens to be lying around in the path,
329 -- possibly including those from a cygwin install on the target,
330 -- which is exactly what we're trying to avoid.
331 ; let gcc_path | am_installed = installed_bin ("gcc -B\"" ++ installed "gcc-lib/\"")
333 -- The trailing "/" is absolutely essential; gcc seems
334 -- to construct file names simply by concatenating to this
335 -- -B path with no extra slash
336 -- We use "/" rather than "\\" because otherwise "\\\" is mangled
337 -- later on; although gcc_path is in NATIVE format, gcc can cope
338 -- (see comments with declarations of global variables)
340 -- The quotes round the -B argument are in case TopDir has spaces in it
342 perl_path | am_installed = installed_bin cGHC_PERL
343 | otherwise = cGHC_PERL
345 -- 'touch' is a GHC util for Windows, and similarly unlit, mangle
346 ; let touch_path | am_installed = installed_bin cGHC_TOUCHY_PGM
347 | otherwise = inplace cGHC_TOUCHY_DIR_REL cGHC_TOUCHY_PGM
349 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
350 -- a call to Perl to get the invocation of split and mangle
351 ; let split_path = perl_path ++ " \"" ++ split_script ++ "\""
352 mangle_path = perl_path ++ " \"" ++ mangle_script ++ "\""
355 | am_installed = pgmPath (installed "gcc-lib/") cMKDLL ++
356 " --dlltool-name " ++ pgmPath (installed "gcc-lib/") "dlltool" ++
357 " --driver-name " ++ gcc_path
360 -- UNIX-SPECIFIC STUFF
361 -- On Unix, the "standard" tools are assumed to be
362 -- in the same place whether we are running "in-place" or "installed"
363 -- That place is wherever the build-time configure script found them.
364 ; let gcc_path = cGCC
366 mkdll_path = panic "Can't build DLLs on a non-Win32 system"
368 -- On Unix, scripts are invoked using the '#!' method. Binary
369 -- installations of GHC on Unix place the correct line on the front
370 -- of the script at installation time, so we don't want to wire-in
371 -- our knowledge of $(PERL) on the host system here.
372 ; let split_path = split_script
373 mangle_path = mangle_script
376 -- cpp is derived from gcc on all platforms
377 ; let cpp_path = gcc_path ++ " -E " ++ cRAWCPP_FLAGS
379 -- For all systems, copy and remove are provided by the host
380 -- system; architecture-specific stuff is done when building Config.hs
381 ; let cp_path = cGHC_CP
383 -- Other things being equal, as and ld are simply gcc
384 ; let as_path = gcc_path
388 -- ilx2il and ilasm are specified in Config.hs
389 ; let ilx2il_path = cILX2IL
393 -- Initialise the global vars
394 ; writeIORef v_Path_package_config pkgconfig_path
395 ; writeIORef v_Path_usage ghc_usage_msg_path
397 ; writeIORef v_Pgm_sysman (top_dir ++ "/ghc/rts/parallel/SysMan")
398 -- Hans: this isn't right in general, but you can
399 -- elaborate it in the same way as the others
401 ; writeIORef v_Pgm_L unlit_path
402 ; writeIORef v_Pgm_P cpp_path
403 ; writeIORef v_Pgm_F ""
404 ; writeIORef v_Pgm_c gcc_path
405 ; writeIORef v_Pgm_m mangle_path
406 ; writeIORef v_Pgm_s split_path
407 ; writeIORef v_Pgm_a as_path
409 ; writeIORef v_Pgm_I ilx2il_path
410 ; writeIORef v_Pgm_i ilasm_path
412 ; writeIORef v_Pgm_l ld_path
413 ; writeIORef v_Pgm_MkDLL mkdll_path
414 ; writeIORef v_Pgm_T touch_path
415 ; writeIORef v_Pgm_CP cp_path
420 #if defined(mingw32_HOST_OS)
421 foreign import stdcall "GetTempPathA" unsafe getTempPath :: Int -> CString -> IO Int32
425 The various setPgm functions are called when a command-line option
430 is used to override a particular program with a new one
433 setPgmL = writeIORef v_Pgm_L
434 setPgmP = writeIORef v_Pgm_P
435 setPgmF = writeIORef v_Pgm_F
436 setPgmc = writeIORef v_Pgm_c
437 setPgmm = writeIORef v_Pgm_m
438 setPgms = writeIORef v_Pgm_s
439 setPgma = writeIORef v_Pgm_a
440 setPgml = writeIORef v_Pgm_l
442 setPgmI = writeIORef v_Pgm_I
443 setPgmi = writeIORef v_Pgm_i
450 -- for "installed" this is the root of GHC's support files
451 -- for "in-place" it is the root of the build tree
454 -- 1. Set proto_top_dir
455 -- a) look for (the last) -B flag, and use it
456 -- b) if there are no -B flags, get the directory
457 -- where GHC is running (only on Windows)
459 -- 2. If package.conf exists in proto_top_dir, we are running
460 -- installed; and TopDir = proto_top_dir
462 -- 3. Otherwise we are running in-place, so
463 -- proto_top_dir will be /...stuff.../ghc/compiler
464 -- Set TopDir to /...stuff..., which is the root of the build tree
466 -- This is very gruesome indeed
468 findTopDir :: [String]
469 -> IO (Bool, -- True <=> am installed, False <=> in-place
470 String) -- TopDir (in Unix format '/' separated)
473 = do { top_dir <- get_proto
474 -- Discover whether we're running in a build tree or in an installation,
475 -- by looking for the package configuration file.
476 ; am_installed <- doesFileExist (top_dir `slash` "package.conf")
478 ; return (am_installed, top_dir)
481 -- get_proto returns a Unix-format path (relying on getExecDir to do so too)
482 get_proto | notNull minusbs
483 = return (unDosifyPath (drop 2 (last minusbs))) -- 2 for "-B"
485 = do { maybe_exec_dir <- getExecDir -- Get directory of executable
486 ; case maybe_exec_dir of -- (only works on Windows;
487 -- returns Nothing on Unix)
488 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
489 Just dir -> return dir
494 %************************************************************************
496 \subsection{Command-line options}
498 %************************************************************************
500 When invoking external tools as part of the compilation pipeline, we
501 pass these a sequence of options on the command-line. Rather than
502 just using a list of Strings, we use a type that allows us to distinguish
503 between filepaths and 'other stuff'. [The reason being, of course, that
504 this type gives us a handle on transforming filenames, and filenames only,
505 to whatever format they're expected to be on a particular platform.]
509 = FileOption -- an entry that _contains_ filename(s) / filepaths.
510 String -- a non-filepath prefix that shouldn't be transformed (e.g., "/out="
511 String -- the filepath/filename portion
514 showOptions :: [Option] -> String
515 showOptions ls = unwords (map (quote.showOpt) ls)
517 showOpt (FileOption pre f) = pre ++ dosifyPath f
518 showOpt (Option s) = s
523 %************************************************************************
525 \subsection{Running an external program}
527 %************************************************************************
531 runUnlit :: [Option] -> IO ()
532 runUnlit args = do p <- readIORef v_Pgm_L
533 runSomething "Literate pre-processor" p args
535 runCpp :: [Option] -> IO ()
536 runCpp args = do p <- readIORef v_Pgm_P
537 runSomething "C pre-processor" p args
539 runPp :: [Option] -> IO ()
540 runPp args = do p <- readIORef v_Pgm_F
541 runSomething "Haskell pre-processor" p args
543 runCc :: [Option] -> IO ()
544 runCc args = do p <- readIORef v_Pgm_c
545 runSomething "C Compiler" p args
547 runMangle :: [Option] -> IO ()
548 runMangle args = do p <- readIORef v_Pgm_m
549 runSomething "Mangler" p args
551 runSplit :: [Option] -> IO ()
552 runSplit args = do p <- readIORef v_Pgm_s
553 runSomething "Splitter" p args
555 runAs :: [Option] -> IO ()
556 runAs args = do p <- readIORef v_Pgm_a
557 runSomething "Assembler" p args
559 runLink :: [Option] -> IO ()
560 runLink args = do p <- readIORef v_Pgm_l
561 runSomething "Linker" p args
564 runIlx2il :: [Option] -> IO ()
565 runIlx2il args = do p <- readIORef v_Pgm_I
566 runSomething "Ilx2Il" p args
568 runIlasm :: [Option] -> IO ()
569 runIlasm args = do p <- readIORef v_Pgm_i
570 runSomething "Ilasm" p args
573 runMkDLL :: [Option] -> IO ()
574 runMkDLL args = do p <- readIORef v_Pgm_MkDLL
575 runSomething "Make DLL" p args
577 touch :: String -> String -> IO ()
578 touch purpose arg = do p <- readIORef v_Pgm_T
579 runSomething purpose p [FileOption "" arg]
581 copy :: String -> String -> String -> IO ()
582 copy purpose from to = do
583 verb <- dynFlag verbosity
584 when (verb >= 2) $ hPutStrLn stderr ("*** " ++ purpose)
586 h <- openFile to WriteMode
587 ls <- readFile from -- inefficient, but it'll do for now.
588 -- ToDo: speed up via slurping.
594 getSysMan :: IO String -- How to invoke the system manager
595 -- (parallel system only)
596 getSysMan = readIORef v_Pgm_sysman
599 %************************************************************************
601 \subsection{GHC Usage message}
603 %************************************************************************
605 Show the usage message and exit
608 showGhcUsage = do { usage_path <- readIORef v_Path_usage
609 ; usage <- readFile usage_path
611 ; exitWith ExitSuccess }
614 dump ('$':'$':s) = hPutStr stderr progName >> dump s
615 dump (c:s) = hPutChar stderr c >> dump s
619 %************************************************************************
621 \subsection{Managing temporary files
623 %************************************************************************
626 GLOBAL_VAR(v_FilesToClean, [], [String] )
627 GLOBAL_VAR(v_TmpDir, cDEFAULT_TMPDIR, String )
628 -- v_TmpDir has no closing '/'
632 setTmpDir dir = writeIORef v_TmpDir dir
634 cleanTempFiles :: Int -> IO ()
635 cleanTempFiles verb = do fs <- readIORef v_FilesToClean
636 removeTmpFiles verb fs
638 cleanTempFilesExcept :: Int -> [FilePath] -> IO ()
639 cleanTempFilesExcept verb dont_delete
640 = do fs <- readIORef v_FilesToClean
641 let leftovers = filter (`notElem` dont_delete) fs
642 removeTmpFiles verb leftovers
643 writeIORef v_FilesToClean dont_delete
646 -- find a temporary name that doesn't already exist.
647 newTempName :: Suffix -> IO FilePath
649 = do x <- getProcessID
650 tmp_dir <- readIORef v_TmpDir
651 findTempName tmp_dir x
653 findTempName tmp_dir x
654 = do let filename = tmp_dir ++ "/ghc" ++ show x ++ '.':extn
655 b <- doesFileExist filename
656 if b then findTempName tmp_dir (x+1)
657 else do add v_FilesToClean filename -- clean it up later
660 addFilesToClean :: [FilePath] -> IO ()
661 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
662 addFilesToClean files = mapM_ (add v_FilesToClean) files
664 removeTmpFiles :: Int -> [FilePath] -> IO ()
665 removeTmpFiles verb fs
666 = traceCmd "Deleting temp files"
667 ("Deleting: " ++ unwords fs)
670 rm f = removeFile f `IO.catch`
673 hPutStrLn stderr ("Warning: deleting non-existent " ++ f)
679 %************************************************************************
681 \subsection{Running a program}
683 %************************************************************************
686 GLOBAL_VAR(v_Dry_run, False, Bool)
689 setDryRun = writeIORef v_Dry_run True
691 -----------------------------------------------------------------------------
692 -- Running an external program
694 runSomething :: String -- For -v message
695 -> String -- Command name (possibly a full path)
696 -- assumed already dos-ified
697 -> [Option] -- Arguments
698 -- runSomething will dos-ify them
701 runSomething phase_name pgm args
702 = traceCmd phase_name cmd_line $
704 #ifndef mingw32_HOST_OS
705 exit_code <- system cmd_line
707 exit_code <- rawSystem cmd_line
709 ; if exit_code /= ExitSuccess
710 then throwDyn (PhaseFailed phase_name exit_code)
714 -- The pgm is already in native format (appropriate dir separators)
715 cmd_line = pgm ++ ' ':showOptions args
716 -- unwords (pgm : dosifyPaths (map quote args))
718 traceCmd :: String -> String -> IO () -> IO ()
719 -- a) trace the command (at two levels of verbosity)
720 -- b) don't do it at all if dry-run is set
721 traceCmd phase_name cmd_line action
722 = do { verb <- dynFlag verbosity
723 ; when (verb >= 2) $ hPutStrLn stderr ("*** " ++ phase_name)
724 ; when (verb >= 3) $ hPutStrLn stderr cmd_line
728 ; n <- readIORef v_Dry_run
732 ; action `IO.catch` handle_exn verb
735 handle_exn verb exn = do { when (verb >= 2) (hPutStr stderr "\n")
736 ; when (verb >= 3) (hPutStrLn stderr ("Failed: " ++ cmd_line))
737 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
741 %************************************************************************
743 \subsection{Path names}
745 %************************************************************************
747 We maintain path names in Unix form ('/'-separated) right until
748 the last moment. On Windows we dos-ify them just before passing them
749 to the Windows command.
751 The alternative, of using '/' consistently on Unix and '\' on Windows,
752 proved quite awkward. There were a lot more calls to dosifyPath,
753 and even on Windows we might invoke a unix-like utility (eg 'sh'), which
754 interpreted a command line 'foo\baz' as 'foobaz'.
757 -----------------------------------------------------------------------------
758 -- Convert filepath into MSDOS form.
760 dosifyPaths :: [String] -> [String]
761 -- dosifyPaths does two things
762 -- a) change '/' to '\'
763 -- b) remove initial '/cygdrive/'
765 unDosifyPath :: String -> String
766 -- Just change '\' to '/'
768 pgmPath :: String -- Directory string in Unix format
769 -> String -- Program name with no directory separators
771 -> String -- Program invocation string in native format
775 #if defined(mingw32_HOST_OS)
777 --------------------- Windows version ------------------
778 dosifyPaths xs = map dosifyPath xs
780 unDosifyPath xs = subst '\\' '/' xs
782 pgmPath dir pgm = dosifyPath dir ++ '\\' : pgm
785 = subst '/' '\\' real_stuff
787 -- fully convince myself that /cygdrive/ prefixes cannot
788 -- really appear here.
789 cygdrive_prefix = "/cygdrive/"
792 | cygdrive_prefix `isPrefixOf` stuff = dropList cygdrive_prefix stuff
797 --------------------- Unix version ---------------------
800 pgmPath dir pgm = dir ++ '/' : pgm
801 dosifyPath stuff = stuff
802 --------------------------------------------------------
805 subst a b ls = map (\ x -> if x == a then b else x) ls
809 -----------------------------------------------------------------------------
810 Path name construction
813 slash :: String -> String -> String
814 absPath, relPath :: [String] -> String
817 relPath xs = foldr1 slash xs
819 absPath xs = "" `slash` relPath xs
821 slash s1 s2 = s1 ++ ('/' : s2)
825 %************************************************************************
827 \subsection{Support code}
829 %************************************************************************
832 -----------------------------------------------------------------------------
833 -- Define getExecDir :: IO (Maybe String)
835 #if defined(mingw32_HOST_OS)
836 getExecDir :: IO (Maybe String)
837 getExecDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
838 buf <- mallocArray len
839 ret <- getModuleFileName nullPtr buf len
840 if ret == 0 then free buf >> return Nothing
841 else do s <- peekCString buf
843 return (Just (reverse (dropList "/bin/ghc.exe" (reverse (unDosifyPath s)))))
846 foreign import stdcall "GetModuleFileNameA" unsafe
847 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
849 getExecDir :: IO (Maybe String) = do return Nothing
852 #ifdef mingw32_HOST_OS
853 foreign import ccall "_getpid" unsafe getProcessID :: IO Int -- relies on Int == Int32 on Windows
854 #elif __GLASGOW_HASKELL__ > 504
855 getProcessID :: IO Int
856 getProcessID = System.Posix.Internals..c_getpid >>= return . fromIntegral
858 getProcessID :: IO Int
859 getProcessID = Posix.getProcessID
862 quote :: String -> String
863 #if defined(mingw32_HOST_OS)
865 quote s = "\"" ++ s ++ "\""