1 -----------------------------------------------------------------------------
2 -- Access to system tools: gcc, cp, rm etc
4 -- (c) The University of Glasgow 2000
6 -----------------------------------------------------------------------------
12 setPgm, -- String -> IO ()
13 -- Command-line override
16 packageConfigPath, -- IO String
17 -- Where package.conf is
19 -- Interface to system tools
20 runUnlit, runCpp, runCc, -- [String] -> IO ()
21 runMangle, runSplit, -- [String] -> IO ()
22 runAs, runLink, -- [String] -> IO ()
25 touch, -- String -> String -> IO ()
26 copy, -- String -> String -> String -> IO ()
28 -- Temporary-file management
31 cleanTempFiles, cleanTempFilesExcept, removeTmpFiles,
35 getProcessID, -- IO Int
36 system, -- String -> IO Int
39 showGhcUsage, -- IO () Shows usage message and exits
40 getSysMan -- IO String Parallel system only
47 import Panic ( progName, GhcException(..) )
48 import Util ( global )
49 import CmdLineOpts ( dynFlag, verbosity )
51 import Exception ( throwDyn, catchAllIO )
53 import Directory ( doesFileExist, removeFile )
54 import IOExts ( IORef, readIORef, writeIORef )
55 import Monad ( when, unless )
56 import System ( system, ExitCode(..), exitWith, getEnv )
58 #include "../includes/config.h"
60 #if !defined(mingw32_TARGET_OS)
61 import qualified Posix
64 import List ( isPrefixOf )
67 import List ( isSuffixOf )
69 #include "HsVersions.h"
74 The configuration story
75 ~~~~~~~~~~~~~~~~~~~~~~~
77 GHC needs various support files (library packages, RTS etc), plus
78 various auxiliary programs (cp, gcc, etc). It finds these in one
81 * When running as an *installed program*, GHC finds most of this support
82 stuff in the installed library tree. The path to this tree is passed
83 to GHC via the -B flag, and given to initSysTools .
85 * When running *in-place* in a build tree, GHC finds most of this support
86 stuff in the build tree. The path to the build tree is, again passed
89 GHC tells which of the two is the case by seeing whether package.conf
90 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
93 SysTools.initSysProgs figures out exactly where all the auxiliary programs
94 are, and initialises mutable variables to make it easy to call them.
95 To to this, it makes use of definitions in Config.hs, which is a Haskell
96 file containing variables whose value is figured out by the build system.
98 Config.hs contains two sorts of things
100 cGCC, The *names* of the programs
103 etc They do *not* include paths
106 cUNLIT_DIR The *path* to the directory containing unlit, split etc
107 cSPLIT_DIR *relative* to the root of the build tree,
108 for use when running *in-place* in a build tree (only)
112 ---------------------------------------------
113 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
115 Another hair-brained scheme for simplifying the current tool location
116 nightmare in GHC: Simon originally suggested using another
117 configuration file along the lines of GCC's specs file - which is fine
118 except that it means adding code to read yet another configuration
119 file. What I didn't notice is that the current package.conf is
120 general enough to do this:
123 {name = "tools", import_dirs = [], source_dirs = [],
124 library_dirs = [], hs_libraries = [], extra_libraries = [],
125 include_dirs = [], c_includes = [], package_deps = [],
126 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${libdir}/bin/unlit", ... etc.],
127 extra_cc_opts = [], extra_ld_opts = []}
129 Which would have the advantage that we get to collect together in one
130 place the path-specific package stuff with the path-specific tool
133 ---------------------------------------------
136 %************************************************************************
138 \subsection{Global variables to contain system programs}
140 %************************************************************************
142 All these pathnames are maintained IN THE NATIVE FORMAT OF THE HOST MACHINE.
143 (See remarks under pathnames below)
146 GLOBAL_VAR(v_Pgm_L, error "pgm_L", String) -- unlit
147 GLOBAL_VAR(v_Pgm_P, error "pgm_P", String) -- cpp
148 GLOBAL_VAR(v_Pgm_c, error "pgm_c", String) -- gcc
149 GLOBAL_VAR(v_Pgm_m, error "pgm_m", String) -- asm code mangler
150 GLOBAL_VAR(v_Pgm_s, error "pgm_s", String) -- asm code splitter
151 GLOBAL_VAR(v_Pgm_a, error "pgm_a", String) -- as
152 GLOBAL_VAR(v_Pgm_l, error "pgm_l", String) -- ld
153 GLOBAL_VAR(v_Pgm_MkDLL, error "pgm_dll", String) -- mkdll
155 GLOBAL_VAR(v_Pgm_T, error "pgm_T", String) -- touch
156 GLOBAL_VAR(v_Pgm_CP, error "pgm_CP", String) -- cp
158 GLOBAL_VAR(v_Path_package_config, error "path_package_config", String)
159 GLOBAL_VAR(v_Path_usage, error "ghc_usage.txt", String)
161 -- Parallel system only
162 GLOBAL_VAR(v_Pgm_sysman, error "pgm_sysman", String) -- system manager
166 %************************************************************************
168 \subsection{Initialisation}
170 %************************************************************************
173 initSysTools :: [String] -- Command-line arguments starting "-B"
175 -> IO String -- Set all the mutable variables above, holding
176 -- (a) the system programs
177 -- (b) the package-config file
178 -- (c) the GHC usage message
182 initSysTools minusB_args
183 = do { (am_installed, top_dir) <- getTopDir minusB_args
185 -- for "installed" this is the root of GHC's support files
186 -- for "in-place" it is the root of the build tree
187 -- NB: top_dir is assumed to be in standard Unix format '/' separated
189 ; let installed, installed_bin :: FilePath -> FilePath
190 #ifndef mingw32_TARGET_OS
191 installed_bin pgm = pgmPath (top_dir `slash` "extra-bin") pgm
193 installed_bin pgm = pgmPath (top_dir `slash` "bin") pgm
195 installed file = pgmPath top_dir file
196 inplace dir pgm = pgmPath (top_dir `slash` dir) pgm
199 | am_installed = installed "package.conf"
200 | otherwise = inplace cGHC_DRIVER_DIR "package.conf.inplace"
203 | am_installed = installed "ghc-usage.txt"
204 | otherwise = inplace cGHC_DRIVER_DIR "ghc-usage.txt"
206 -- For all systems, unlit, split, mangle are GHC utilities
207 -- architecture-specific stuff is done when building Config.hs
209 | am_installed = installed_bin cGHC_UNLIT
210 | otherwise = inplace cGHC_UNLIT_DIR cGHC_UNLIT
212 -- split and mangle are Perl scripts
214 | am_installed = installed_bin cGHC_SPLIT
215 | otherwise = inplace cGHC_SPLIT_DIR cGHC_SPLIT
218 | am_installed = installed_bin cGHC_MANGLER
219 | otherwise = inplace cGHC_MANGLER_DIR cGHC_MANGLER
221 #ifndef mingw32_TARGET_OS
222 -- check whether TMPDIR is set in the environment
223 ; IO.try (do dir <- getEnv "TMPDIR" -- fails if not set
229 -- Check that the package config exists
230 ; config_exists <- doesFileExist pkgconfig_path
231 ; when (not config_exists) $
232 throwDyn (InstallationError
233 ("Can't find package.conf as " ++ pkgconfig_path))
235 #if defined(mingw32_TARGET_OS)
236 -- WINDOWS-SPECIFIC STUFF
237 -- On Windows, gcc and friends are distributed with GHC,
238 -- so when "installed" we look in TopDir/bin
239 -- When "in-place" we look wherever the build-time configure
241 -- When "install" we tell gcc where its specs file + exes are (-B)
242 -- and also some places to pick up include files. We need
243 -- to be careful to put all necessary exes in the -B place
244 -- (as, ld, cc1, etc) since if they don't get found there, gcc
245 -- then tries to run unadorned "as", "ld", etc, and will
246 -- pick up whatever happens to be lying around in the path,
247 -- possibly including those from a cygwin install on the target,
248 -- which is exactly what we're trying to avoid.
249 ; let gcc_path | am_installed = installed_bin ("gcc -B" ++ installed "gcc-lib/"
250 ++ " -I" ++ installed "include/mingw")
252 perl_path | am_installed = installed_bin cGHC_PERL
253 | otherwise = cGHC_PERL
255 -- 'touch' is a GHC util for Windows, and similarly unlit, mangle
256 ; let touch_path | am_installed = installed_bin cGHC_TOUCHY
257 | otherwise = inplace cGHC_TOUCHY_DIR cGHC_TOUCHY
259 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
260 -- a call to Perl to get the invocation of split and mangle
261 ; let split_path = perl_path ++ " " ++ split_script
262 mangle_path = perl_path ++ " " ++ mangle_script
264 ; let mkdll_path = cMKDLL
266 -- UNIX-SPECIFIC STUFF
267 -- On Unix, the "standard" tools are assumed to be
268 -- in the same place whether we are running "in-place" or "installed"
269 -- That place is wherever the build-time configure script found them.
270 ; let gcc_path = cGCC
271 touch_path = cGHC_TOUCHY
272 mkdll_path = panic "Can't build DLLs on a non-Win32 system"
274 -- On Unix, scripts are invoked using the '#!' method. Binary
275 -- installations of GHC on Unix place the correct line on the front
276 -- of the script at installation time, so we don't want to wire-in
277 -- our knowledge of $(PERL) on the host system here.
278 ; let split_path = split_script
279 mangle_path = mangle_script
282 -- cpp is derived from gcc on all platforms
283 ; let cpp_path = gcc_path ++ " -E " ++ cRAWCPP_FLAGS
285 -- For all systems, copy and remove are provided by the host
286 -- system; architecture-specific stuff is done when building Config.hs
287 ; let cp_path = cGHC_CP
289 -- Other things being equal, as and ld are simply gcc
290 ; let as_path = gcc_path
294 -- Initialise the global vars
295 ; writeIORef v_Path_package_config pkgconfig_path
296 ; writeIORef v_Path_usage ghc_usage_msg_path
298 ; writeIORef v_Pgm_sysman (top_dir ++ "/ghc/rts/parallel/SysMan")
299 -- Hans: this isn't right in general, but you can
300 -- elaborate it in the same way as the others
302 ; writeIORef v_Pgm_L unlit_path
303 ; writeIORef v_Pgm_P cpp_path
304 ; writeIORef v_Pgm_c gcc_path
305 ; writeIORef v_Pgm_m mangle_path
306 ; writeIORef v_Pgm_s split_path
307 ; writeIORef v_Pgm_a as_path
308 ; writeIORef v_Pgm_l ld_path
309 ; writeIORef v_Pgm_MkDLL mkdll_path
310 ; writeIORef v_Pgm_T touch_path
311 ; writeIORef v_Pgm_CP cp_path
317 setPgm is called when a command-line option like
319 is used to override a particular program with a new onw
322 setPgm :: String -> IO ()
323 -- The string is the flag, minus the '-pgm' prefix
324 -- So the first character says which program to override
326 setPgm ('P' : pgm) = writeIORef v_Pgm_P pgm
327 setPgm ('c' : pgm) = writeIORef v_Pgm_c pgm
328 setPgm ('m' : pgm) = writeIORef v_Pgm_m pgm
329 setPgm ('s' : pgm) = writeIORef v_Pgm_s pgm
330 setPgm ('a' : pgm) = writeIORef v_Pgm_a pgm
331 setPgm ('l' : pgm) = writeIORef v_Pgm_l pgm
332 setPgm pgm = unknownFlagErr ("-pgm" ++ pgm)
338 -- for "installed" this is the root of GHC's support files
339 -- for "in-place" it is the root of the build tree
342 -- 1. Set proto_top_dir
343 -- a) look for (the last) -B flag, and use it
344 -- b) if there are no -B flags, get the directory
345 -- where GHC is running (only on Windows)
347 -- 2. If package.conf exists in proto_top_dir, we are running
348 -- installed; and TopDir = proto_top_dir
350 -- 3. Otherwise we are running in-place, so
351 -- proto_top_dir will be /...stuff.../ghc/compiler
352 -- Set TopDir to /...stuff..., which is the root of the build tree
354 -- This is very gruesome indeed
356 getTopDir :: [String]
357 -> IO (Bool, -- True <=> am installed, False <=> in-place
358 String) -- TopDir (in Unix format '/' separated)
361 = do { top_dir <- get_proto
362 -- Discover whether we're running in a build tree or in an installation,
363 -- by looking for the package configuration file.
364 ; am_installed <- doesFileExist (top_dir `slash` "package.conf")
366 ; return (am_installed, top_dir)
369 -- get_proto returns a Unix-format path
370 get_proto | not (null minusbs)
371 = return (unDosifyPath (drop 2 (last minusbs))) -- 2 for "-B"
373 = do { maybe_exec_dir <- getExecDir -- Get directory of executable
374 ; case maybe_exec_dir of -- (only works on Windows;
375 -- returns Nothing on Unix)
376 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
377 Just dir -> return (remove_suffix (unDosifyPath dir))
380 -- In an installed tree, the ghc binary lives in $libexecdir, which
381 -- is normally $libdir/bin. So we strip off a /bin suffix here.
382 -- In a build tree, the ghc binary lives in $fptools/ghc/compiler,
383 -- so we strip off the /ghc/compiler suffix here too, leaving a
385 -- Unfortunately, getting top_dir like this and then using it to generate
386 -- the path on which to find binaries means that we're ignoring
387 -- $libexecdir anyway.
388 remove_suffix ghc_bin_dir -- ghc_bin_dir is in standard Unix format
389 | "/ghc/compiler" `isSuffixOf` ghc_bin_dir = back_two
390 | "/bin" `isSuffixOf` ghc_bin_dir = back_one
391 | otherwise = ghc_bin_dir
393 p1 = dropWhile (not . isSlash) (reverse ghc_bin_dir)
394 p2 = dropWhile (not . isSlash) (tail p1) -- head is '/'
395 back_two = reverse (tail p2) -- head is '/'
396 back_one = reverse (tail p1)
400 %************************************************************************
402 \subsection{Running an external program}
404 %************************************************************************
408 runUnlit :: [String] -> IO ()
409 runUnlit args = do p <- readIORef v_Pgm_L
410 runSomething "Literate pre-processor" p args
412 runCpp :: [String] -> IO ()
413 runCpp args = do p <- readIORef v_Pgm_P
414 runSomething "C pre-processor" p args
416 runCc :: [String] -> IO ()
417 runCc args = do p <- readIORef v_Pgm_c
418 runSomething "C Compiler" p args
420 runMangle :: [String] -> IO ()
421 runMangle args = do p <- readIORef v_Pgm_m
422 runSomething "Mangler" p args
424 runSplit :: [String] -> IO ()
425 runSplit args = do p <- readIORef v_Pgm_s
426 runSomething "Splitter" p args
428 runAs :: [String] -> IO ()
429 runAs args = do p <- readIORef v_Pgm_a
430 runSomething "Assembler" p args
432 runLink :: [String] -> IO ()
433 runLink args = do p <- readIORef v_Pgm_l
434 runSomething "Linker" p args
436 runMkDLL :: [String] -> IO ()
437 runMkDLL args = do p <- readIORef v_Pgm_MkDLL
438 runSomething "Make DLL" p args
440 touch :: String -> String -> IO ()
441 touch purpose arg = do p <- readIORef v_Pgm_T
442 runSomething purpose p [arg]
444 copy :: String -> String -> String -> IO ()
445 copy purpose from to = do
446 verb <- dynFlag verbosity
447 when (verb >= 2) $ hPutStrLn stderr ("*** " ++ purpose)
449 h <- openFile to WriteMode
450 ls <- readFile from -- inefficient, but it'll do for now.
451 -- ToDo: speed up via slurping.
457 getSysMan :: IO String -- How to invoke the system manager
458 -- (parallel system only)
459 getSysMan = readIORef v_Pgm_sysman
462 %************************************************************************
464 \subsection{GHC Usage message}
466 %************************************************************************
468 Show the usage message and exit
471 showGhcUsage = do { usage_path <- readIORef v_Path_usage
472 ; usage <- readFile usage_path
474 ; exitWith ExitSuccess }
477 dump ('$':'$':s) = hPutStr stderr progName >> dump s
478 dump (c:s) = hPutChar stderr c >> dump s
480 packageConfigPath = readIORef v_Path_package_config
484 %************************************************************************
486 \subsection{Managing temporary files
488 %************************************************************************
491 GLOBAL_VAR(v_FilesToClean, [], [String] )
492 GLOBAL_VAR(v_TmpDir, cDEFAULT_TMPDIR, String )
493 -- v_TmpDir has no closing '/'
497 setTmpDir dir = writeIORef v_TmpDir dir
499 cleanTempFiles :: Int -> IO ()
500 cleanTempFiles verb = do fs <- readIORef v_FilesToClean
501 removeTmpFiles verb fs
503 cleanTempFilesExcept :: Int -> [FilePath] -> IO ()
504 cleanTempFilesExcept verb dont_delete
505 = do fs <- readIORef v_FilesToClean
506 let leftovers = filter (`notElem` dont_delete) fs
507 removeTmpFiles verb leftovers
508 writeIORef v_FilesToClean dont_delete
511 -- find a temporary name that doesn't already exist.
512 newTempName :: Suffix -> IO FilePath
514 = do x <- getProcessID
515 tmp_dir <- readIORef v_TmpDir
516 findTempName tmp_dir x
518 findTempName tmp_dir x
519 = do let filename = tmp_dir ++ "/ghc" ++ show x ++ '.':extn
520 b <- doesFileExist filename
521 if b then findTempName tmp_dir (x+1)
522 else do add v_FilesToClean filename -- clean it up later
525 addFilesToClean :: [FilePath] -> IO ()
526 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
527 addFilesToClean files = mapM_ (add v_FilesToClean) files
529 removeTmpFiles :: Int -> [FilePath] -> IO ()
530 removeTmpFiles verb fs
531 = traceCmd "Deleting temp files"
532 ("Deleting: " ++ unwords fs)
535 rm f = removeFile f `catchAllIO`
538 hPutStrLn stderr ("Warning: deleting non-existent " ++ f)
544 %************************************************************************
546 \subsection{Running a program}
548 %************************************************************************
551 GLOBAL_VAR(v_Dry_run, False, Bool)
554 setDryRun = writeIORef v_Dry_run True
556 -----------------------------------------------------------------------------
557 -- Running an external program
559 runSomething :: String -- For -v message
560 -> String -- Command name (possibly a full path)
561 -- assumed already dos-ified
562 -> [String] -- Arguments
563 -- runSomething will dos-ify them
566 runSomething phase_name pgm args
567 = traceCmd phase_name cmd_line $
568 do { exit_code <- system cmd_line
569 ; if exit_code /= ExitSuccess
570 then throwDyn (PhaseFailed phase_name exit_code)
574 cmd_line = unwords (pgm : dosifyPaths args)
575 -- The pgm is already in native format (appropriate dir separators)
577 traceCmd :: String -> String -> IO () -> IO ()
578 -- a) trace the command (at two levels of verbosity)
579 -- b) don't do it at all if dry-run is set
580 traceCmd phase_name cmd_line action
581 = do { verb <- dynFlag verbosity
582 ; when (verb >= 2) $ hPutStrLn stderr ("*** " ++ phase_name)
583 ; when (verb >= 3) $ hPutStrLn stderr cmd_line
587 ; n <- readIORef v_Dry_run
591 ; action `catchAllIO` handle_exn verb
594 handle_exn verb exn = do { when (verb >= 2) (hPutStr stderr "\n")
595 ; when (verb >= 3) (hPutStrLn stderr ("Failed: " ++ cmd_line))
596 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
600 %************************************************************************
602 \subsection{Path names}
604 %************************************************************************
606 We maintain path names in Unix form ('/'-separated) right until
607 the last moment. On Windows we dos-ify them just before passing them
608 to the Windows command.
610 The alternative, of using '/' consistently on Unix and '\' on Windows,
611 proved quite awkward. There were a lot more calls to dosifyPath,
612 and even on Windows we might invoke a unix-like utility (eg 'sh'), which
613 interpreted a command line 'foo\baz' as 'foobaz'.
616 -----------------------------------------------------------------------------
617 -- Convert filepath into MSDOS form.
619 dosifyPaths :: [String] -> [String]
620 -- dosifyPaths does two things
621 -- a) change '/' to '\'
622 -- b) remove initial '/cygdrive/'
624 unDosifyPath :: String -> String
625 -- Just change '\' to '/'
627 pgmPath :: String -- Directory string in Unix format
628 -> String -- Program name with no directory separators
630 -> String -- Program invocation string in native format
634 #if defined(mingw32_TARGET_OS)
636 --------------------- Windows version ------------------
637 dosifyPaths xs = map dosifyPath xs
639 unDosifyPath xs = subst '\\' '/' xs
641 pgmPath dir pgm = dosifyPath dir ++ '\\' : pgm
644 = subst '/' '\\' real_stuff
646 -- fully convince myself that /cygdrive/ prefixes cannot
647 -- really appear here.
648 cygdrive_prefix = "/cygdrive/"
651 | cygdrive_prefix `isPrefixOf` stuff = drop (length cygdrive_prefix) stuff
656 --------------------- Unix version ---------------------
659 pgmPath dir pgm = dir ++ '/' : pgm
660 --------------------------------------------------------
663 subst a b ls = map (\ x -> if x == a then b else x) ls
667 -----------------------------------------------------------------------------
668 Path name construction
671 slash :: String -> String -> String
672 absPath, relPath :: [String] -> String
675 isSlash other = False
678 relPath xs = foldr1 slash xs
680 absPath xs = "" `slash` relPath xs
682 slash s1 s2 = s1 ++ ('/' : s2)
686 %************************************************************************
688 \subsection{Support code}
690 %************************************************************************
693 -----------------------------------------------------------------------------
694 -- Define getExecDir :: IO (Maybe String)
696 #if defined(mingw32_TARGET_OS)
697 getExecDir :: IO (Maybe String)
698 getExecDir = do h <- getModuleHandle Nothing
699 n <- getModuleFileName h
700 return (Just (reverse (tail (dropWhile (not . isSlash) (reverse (unDosifyPath n))))))
702 getExecDir :: IO (Maybe String) = do return Nothing
705 #ifdef mingw32_TARGET_OS
706 foreign import "_getpid" getProcessID :: IO Int -- relies on Int == Int32 on Windows
708 getProcessID :: IO Int
709 getProcessID = Posix.getProcessID