1 -----------------------------------------------------------------------------
5 -- Static flags can only be set once, on the command-line. Inside GHC,
6 -- each static flag corresponds to a top-level value, usually of type Bool.
8 -- (c) The University of Glasgow 2005
10 -----------------------------------------------------------------------------
18 WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag, isRTSWay,
20 -- Output style options
25 opt_AutoSccsOnAllToplevs,
26 opt_AutoSccsOnExportedToplevs,
27 opt_AutoSccsOnIndividualCafs,
36 opt_IrrefutableTuples,
45 opt_SimplNoPreInlining,
46 opt_SimplExcessPrecision,
50 opt_UF_CreationThreshold,
52 opt_UF_FunAppDiscount,
74 #include "HsVersions.h"
78 import FastString ( FastString, mkFastString )
80 import Maybes ( firstJust )
83 import Control.Exception ( throwDyn )
85 import System.IO.Unsafe ( unsafePerformIO )
86 import Control.Monad ( when )
87 import Data.Char ( isDigit )
88 import Data.List ( sort, intersperse, nub )
90 -----------------------------------------------------------------------------
93 parseStaticFlags :: [String] -> IO [String]
94 parseStaticFlags args = do
95 ready <- readIORef v_opt_C_ready
96 when ready $ throwDyn (ProgramError "Too late for parseStaticFlags: call it before newSession")
98 (leftover, errs) <- processArgs static_flags args
99 when (not (null errs)) $ throwDyn (UsageError (unlines errs))
101 -- deal with the way flags: the way (eg. prof) gives rise to
102 -- further flags, some of which might be static.
103 way_flags <- findBuildTag
105 -- if we're unregisterised, add some more flags
106 let unreg_flags | cGhcUnregisterised == "YES" = unregFlags
109 (more_leftover, errs) <- processArgs static_flags (unreg_flags ++ way_flags)
111 -- see sanity code in staticOpts
112 writeIORef v_opt_C_ready True
114 -- TABLES_NEXT_TO_CODE affects the info table layout.
115 -- Be careful to do this *after* all processArgs,
116 -- because evaluating tablesNextToCode involves looking at the global
117 -- static flags. Those pesky global variables...
118 let cg_flags | tablesNextToCode = ["-optc-DTABLES_NEXT_TO_CODE"]
121 when (not (null errs)) $ ghcError (UsageError (unlines errs))
122 return (cg_flags++more_leftover++leftover)
124 initStaticOpts :: IO ()
125 initStaticOpts = writeIORef v_opt_C_ready True
127 static_flags :: [(String, OptKind IO)]
128 -- All the static flags should appear in this list. It describes how each
129 -- static flag should be processed. Two main purposes:
130 -- (a) if a command-line flag doesn't appear in the list, GHC can complain
131 -- (b) a command-line flag may remove, or add, other flags; e.g. the "-fno-X" things
133 -- The common (PassFlag addOpt) action puts the static flag into the bunch of
134 -- things that are searched up by the top-level definitions like
135 -- opt_foo = lookUp FSLIT("-dfoo")
137 -- Note that ordering is important in the following list: any flag which
138 -- is a prefix flag (i.e. HasArg, Prefix, OptPrefix, AnySuffix) will override
139 -- flags further down the list with the same prefix.
142 ------- GHCi -------------------------------------------------------
143 ( "ignore-dot-ghci", PassFlag addOpt )
144 , ( "read-dot-ghci" , NoArg (removeOpt "-ignore-dot-ghci") )
146 ------- ways --------------------------------------------------------
147 , ( "prof" , NoArg (addWay WayProf) )
148 , ( "unreg" , NoArg (addWay WayUnreg) )
149 , ( "ticky" , NoArg (addWay WayTicky) )
150 , ( "parallel" , NoArg (addWay WayPar) )
151 , ( "gransim" , NoArg (addWay WayGran) )
152 , ( "smp" , NoArg (addWay WayThreaded) ) -- backwards compat.
153 , ( "debug" , NoArg (addWay WayDebug) )
154 , ( "ndp" , NoArg (addWay WayNDP) )
155 , ( "threaded" , NoArg (addWay WayThreaded) )
158 ------ Debugging ----------------------------------------------------
159 , ( "dppr-debug", PassFlag addOpt )
160 , ( "dppr-user-length", AnySuffix addOpt )
161 -- rest of the debugging flags are dynamic
163 --------- Haskell Program Coverage -----------------------------------
165 , ( "fhpc" , PassFlag addOpt )
167 --------- Profiling --------------------------------------------------
168 , ( "auto-all" , NoArg (addOpt "-fauto-sccs-on-all-toplevs") )
169 , ( "auto" , NoArg (addOpt "-fauto-sccs-on-exported-toplevs") )
170 , ( "caf-all" , NoArg (addOpt "-fauto-sccs-on-individual-cafs") )
171 -- "ignore-sccs" doesn't work (ToDo)
173 , ( "no-auto-all" , NoArg (removeOpt "-fauto-sccs-on-all-toplevs") )
174 , ( "no-auto" , NoArg (removeOpt "-fauto-sccs-on-exported-toplevs") )
175 , ( "no-caf-all" , NoArg (removeOpt "-fauto-sccs-on-individual-cafs") )
177 ------- Miscellaneous -----------------------------------------------
178 , ( "no-link-chk" , NoArg (return ()) ) -- ignored for backwards compat
180 ----- Linker --------------------------------------------------------
181 , ( "static" , PassFlag addOpt )
182 , ( "dynamic" , NoArg (removeOpt "-static") )
183 , ( "rdynamic" , NoArg (return ()) ) -- ignored for compat w/ gcc
185 ----- RTS opts ------------------------------------------------------
186 , ( "H" , HasArg (setHeapSize . fromIntegral . decodeSize) )
187 , ( "Rghc-timing" , NoArg (enableTimingStats) )
189 ------ Compiler flags -----------------------------------------------
190 -- All other "-fno-<blah>" options cancel out "-f<blah>" on the hsc cmdline
191 , ( "fno-", PrefixPred (\s -> isStaticFlag ("f"++s))
192 (\s -> removeOpt ("-f"++s)) )
194 -- Pass all remaining "-f<blah>" options to hsc
195 , ( "f", AnySuffixPred (isStaticFlag) addOpt )
198 addOpt = consIORef v_opt_C
200 addWay = consIORef v_Ways
203 fs <- readIORef v_opt_C
204 writeIORef v_opt_C $! filter (/= f) fs
206 lookUp :: FastString -> Bool
207 lookup_def_int :: String -> Int -> Int
208 lookup_def_float :: String -> Float -> Float
209 lookup_str :: String -> Maybe String
211 -- holds the static opts while they're being collected, before
212 -- being unsafely read by unpacked_static_opts below.
213 GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String])
214 GLOBAL_VAR(v_opt_C_ready, False, Bool)
215 staticFlags = unsafePerformIO $ do
216 ready <- readIORef v_opt_C_ready
218 then panic "a static opt was looked at too early!"
219 else readIORef v_opt_C
221 -- -static is the default
222 defaultStaticOpts = ["-static"]
224 packed_static_opts = map mkFastString staticFlags
226 lookUp sw = sw `elem` packed_static_opts
228 -- (lookup_str "foo") looks for the flag -foo=X or -fooX,
229 -- and returns the string X
231 = case firstJust (map (startsWith sw) staticFlags) of
232 Just ('=' : str) -> Just str
236 lookup_def_int sw def = case (lookup_str sw) of
237 Nothing -> def -- Use default
238 Just xx -> try_read sw xx
240 lookup_def_float sw def = case (lookup_str sw) of
241 Nothing -> def -- Use default
242 Just xx -> try_read sw xx
245 try_read :: Read a => String -> String -> a
246 -- (try_read sw str) tries to read s; if it fails, it
247 -- bleats about flag sw
250 ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses
251 [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw))
252 -- ToDo: hack alert. We should really parse the arugments
253 -- and announce errors in a more civilised way.
257 Putting the compiler options into temporary at-files
258 may turn out to be necessary later on if we turn hsc into
259 a pure Win32 application where I think there's a command-line
260 length limit of 255. unpacked_opts understands the @ option.
262 unpacked_opts :: [String]
266 map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts
268 expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
273 opt_IgnoreDotGhci = lookUp FSLIT("-ignore-dot-ghci")
276 opt_PprStyle_Debug = lookUp FSLIT("-dppr-debug")
277 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
280 opt_AutoSccsOnAllToplevs = lookUp FSLIT("-fauto-sccs-on-all-toplevs")
281 opt_AutoSccsOnExportedToplevs = lookUp FSLIT("-fauto-sccs-on-exported-toplevs")
282 opt_AutoSccsOnIndividualCafs = lookUp FSLIT("-fauto-sccs-on-individual-cafs")
283 opt_SccProfilingOn = lookUp FSLIT("-fscc-profiling")
284 opt_DoTickyProfiling = WayTicky `elem` (unsafePerformIO $ readIORef v_Ways)
287 opt_Hpc = lookUp FSLIT("-fhpc")
290 opt_DictsStrict = lookUp FSLIT("-fdicts-strict")
291 opt_IrrefutableTuples = lookUp FSLIT("-firrefutable-tuples")
292 opt_Parallel = lookUp FSLIT("-fparallel")
293 opt_Flatten = lookUp FSLIT("-fflatten")
296 opt_NoStateHack = lookUp FSLIT("-fno-state-hack")
297 opt_NoMethodSharing = lookUp FSLIT("-fno-method-sharing")
298 opt_CprOff = lookUp FSLIT("-fcpr-off")
299 -- Switch off CPR analysis in the new demand analyser
300 opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int)
302 opt_GranMacros = lookUp FSLIT("-fgransim")
303 opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer
304 opt_HistorySize = lookup_def_int "-fhistory-size" 20
305 opt_OmitBlackHoling = lookUp FSLIT("-dno-black-holing")
306 opt_RuntimeTypes = lookUp FSLIT("-fruntime-types")
308 -- Simplifier switches
309 opt_SimplNoPreInlining = lookUp FSLIT("-fno-pre-inlining")
310 -- NoPreInlining is there just to see how bad things
311 -- get if you don't do it!
312 opt_SimplExcessPrecision = lookUp FSLIT("-fexcess-precision")
315 opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int)
316 opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (8::Int) -- Discounts can be big
317 opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn
318 opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float)
319 opt_UF_UpdateInPlace = lookUp FSLIT("-funfolding-update-in-place")
321 opt_UF_DearOp = ( 4 :: Int)
323 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
326 opt_PIC = lookUp FSLIT("-fPIC")
328 opt_Static = lookUp FSLIT("-static")
329 opt_Unregisterised = lookUp FSLIT("-funregisterised")
331 -- Derived, not a real option. Determines whether we will be compiling
332 -- info tables that reside just before the entry code, or with an
333 -- indirection to the entry code. See TABLES_NEXT_TO_CODE in
334 -- includes/InfoTables.h.
335 tablesNextToCode = not opt_Unregisterised
336 && cGhcEnableTablesNextToCode == "YES"
338 opt_EmitExternalCore = lookUp FSLIT("-fext-core")
340 -- Include full span info in error messages, instead of just the start position.
341 opt_ErrorSpans = lookUp FSLIT("-ferror-spans")
344 -- object files and libraries to be linked in are collected here.
345 -- ToDo: perhaps this could be done without a global, it wasn't obvious
346 -- how to do it though --SDM.
347 GLOBAL_VAR(v_Ld_inputs, [], [String])
351 "fauto-sccs-on-all-toplevs",
352 "fauto-sccs-on-exported-toplevs",
353 "fauto-sccs-on-individual-cafs",
356 "firrefutable-tuples",
360 "fno-hi-version-check",
362 "fno-method-sharing",
367 "funfolding-update-in-place",
375 || any (flip prefixMatch f) [
376 "fliberate-case-threshold",
379 "funfolding-creation-threshold",
380 "funfolding-use-threshold",
381 "funfolding-fun-discount",
382 "funfolding-keeness-factor"
387 -- Misc functions for command-line options
389 startsWith :: String -> String -> Maybe String
390 -- startsWith pfx (pfx++rest) = Just rest
392 startsWith [] str = Just str
393 startsWith (c:cs) (s:ss)
394 = if c /= s then Nothing else startsWith cs ss
395 startsWith _ [] = Nothing
398 -----------------------------------------------------------------------------
399 -- convert sizes like "3.5M" into integers
401 decodeSize :: String -> Integer
403 | c == "" = truncate n
404 | c == "K" || c == "k" = truncate (n * 1000)
405 | c == "M" || c == "m" = truncate (n * 1000 * 1000)
406 | c == "G" || c == "g" = truncate (n * 1000 * 1000 * 1000)
407 | otherwise = throwDyn (CmdLineError ("can't decode size: " ++ str))
408 where (m, c) = span pred str
410 pred c = isDigit c || c == '.'
413 -----------------------------------------------------------------------------
416 foreign import ccall unsafe "setHeapSize" setHeapSize :: Int -> IO ()
417 foreign import ccall unsafe "enableTimingStats" enableTimingStats :: IO ()
419 -----------------------------------------------------------------------------
422 -- The central concept of a "way" is that all objects in a given
423 -- program must be compiled in the same "way". Certain options change
424 -- parameters of the virtual machine, eg. profiling adds an extra word
425 -- to the object header, so profiling objects cannot be linked with
426 -- non-profiling objects.
428 -- After parsing the command-line options, we determine which "way" we
429 -- are building - this might be a combination way, eg. profiling+ticky-ticky.
431 -- We then find the "build-tag" associated with this way, and this
432 -- becomes the suffix used to find .hi files and libraries used in
435 GLOBAL_VAR(v_Build_tag, "", String)
437 -- The RTS has its own build tag, because there are some ways that
438 -- affect the RTS only.
439 GLOBAL_VAR(v_RTS_Build_tag, "", String)
469 GLOBAL_VAR(v_Ways, [] ,[WayName])
471 allowed_combination way = and [ x `allowedWith` y
472 | x <- way, y <- way, x < y ]
474 -- Note ordering in these tests: the left argument is
475 -- <= the right argument, according to the Ord instance
478 -- debug is allowed with everything
479 _ `allowedWith` WayDebug = True
480 WayDebug `allowedWith` _ = True
482 WayProf `allowedWith` WayUnreg = True
483 WayProf `allowedWith` WayNDP = True
484 _ `allowedWith` _ = False
487 findBuildTag :: IO [String] -- new options
489 way_names <- readIORef v_Ways
490 let ws = sort (nub way_names)
492 if not (allowed_combination ws)
493 then throwDyn (CmdLineError $
494 "combination not supported: " ++
495 foldr1 (\a b -> a ++ '/':b)
496 (map (wayName . lkupWay) ws))
497 else let ways = map lkupWay ws
498 tag = mkBuildTag (filter (not.wayRTSOnly) ways)
499 rts_tag = mkBuildTag ways
500 flags = map wayOpts ways
502 writeIORef v_Build_tag tag
503 writeIORef v_RTS_Build_tag rts_tag
504 return (concat flags)
508 mkBuildTag :: [Way] -> String
509 mkBuildTag ways = concat (intersperse "_" (map wayTag ways))
512 case lookup w way_details of
513 Nothing -> error "findBuildTag"
514 Just details -> details
516 isRTSWay = wayRTSOnly . lkupWay
525 way_details :: [ (WayName, Way) ]
527 [ (WayThreaded, Way "thr" True "Threaded" [
528 #if defined(freebsd_TARGET_OS)
531 -- FreeBSD's default threading library is the KSE-based M:N libpthread,
532 -- which GHC has some problems with. It's currently not clear whether
533 -- the problems are our fault or theirs, but it seems that using the
534 -- alternative 1:1 threading library libthr works around it:
536 #elif defined(solaris2_TARGET_OS)
541 (WayDebug, Way "debug" True "Debug" [] ),
543 (WayProf, Way "p" False "Profiling"
546 , "-optc-DPROFILING" ]),
548 (WayTicky, Way "t" True "Ticky-ticky Profiling"
550 , "-optc-DTICKY_TICKY" ]),
552 (WayUnreg, Way "u" False "Unregisterised"
555 -- optl's below to tell linker where to find the PVM library -- HWL
556 (WayPar, Way "mp" False "Parallel"
558 , "-D__PARALLEL_HASKELL__"
560 , "-package concurrent"
562 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
566 -- at the moment we only change the RTS and could share compiler and libs!
567 (WayPar, Way "mt" False "Parallel ticky profiling"
569 , "-D__PARALLEL_HASKELL__"
572 , "-package concurrent"
574 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
578 (WayPar, Way "md" False "Distributed"
580 , "-D__PARALLEL_HASKELL__"
581 , "-D__DISTRIBUTED_HASKELL__"
584 , "-package concurrent"
586 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
590 (WayGran, Way "mg" False "GranSim"
594 , "-package concurrent" ]),
596 (WayNDP, Way "ndp" False "Nested data parallelism"
600 (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]),
601 (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]),
602 (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]),
603 (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]),
604 (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]),
605 (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]),
606 (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]),
607 (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]),
608 (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]),
609 (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]),
610 (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]),
611 (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]),
612 (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]),
613 (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]),
614 (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]),
615 (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]),
616 (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"])
621 , "-optc-DUSE_MINIINTERPRETER"
622 , "-fno-asm-mangling"