1 {-# OPTIONS -fno-cse #-}
2 -- -fno-cse is needed for GLOBAL_VAR's to behave properly
4 -----------------------------------------------------------------------------
8 -- Static flags can only be set once, on the command-line. Inside GHC,
9 -- each static flag corresponds to a top-level value, usually of type Bool.
11 -- (c) The University of Glasgow 2005
13 -----------------------------------------------------------------------------
20 WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag, isRTSWay,
22 -- Output style options
29 opt_AutoSccsOnAllToplevs,
30 opt_AutoSccsOnExportedToplevs,
31 opt_AutoSccsOnIndividualCafs,
40 opt_IrrefutableTuples,
46 opt_SimpleListLiterals,
47 opt_SpecInlineJoinPoints,
49 opt_SimplNoPreInlining,
50 opt_SimplExcessPrecision,
54 opt_UF_CreationThreshold,
56 opt_UF_FunAppDiscount,
60 -- Optimization fuel controls
81 addOpt, removeOpt, addWay, findBuildTag, v_opt_C_ready
84 #include "HsVersions.h"
89 import Maybes ( firstJust )
93 import System.IO.Unsafe ( unsafePerformIO )
96 -----------------------------------------------------------------------------
99 initStaticOpts :: IO ()
100 initStaticOpts = writeIORef v_opt_C_ready True
102 addOpt :: String -> IO ()
103 addOpt = consIORef v_opt_C
105 addWay :: WayName -> IO ()
106 addWay = consIORef v_Ways
108 removeOpt :: String -> IO ()
110 fs <- readIORef v_opt_C
111 writeIORef v_opt_C $! filter (/= f) fs
113 lookUp :: FastString -> Bool
114 lookup_def_int :: String -> Int -> Int
115 lookup_def_float :: String -> Float -> Float
116 lookup_str :: String -> Maybe String
118 -- holds the static opts while they're being collected, before
119 -- being unsafely read by unpacked_static_opts below.
120 GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String])
121 GLOBAL_VAR(v_opt_C_ready, False, Bool)
123 staticFlags :: [String]
124 staticFlags = unsafePerformIO $ do
125 ready <- readIORef v_opt_C_ready
127 then panic "Static flags have not been initialised!\n Please call GHC.newSession or GHC.parseStaticFlags early enough."
128 else readIORef v_opt_C
130 -- -static is the default
131 defaultStaticOpts :: [String]
132 defaultStaticOpts = ["-static"]
134 packed_static_opts :: [FastString]
135 packed_static_opts = map mkFastString staticFlags
137 lookUp sw = sw `elem` packed_static_opts
139 -- (lookup_str "foo") looks for the flag -foo=X or -fooX,
140 -- and returns the string X
142 = case firstJust (map (maybePrefixMatch sw) staticFlags) of
143 Just ('=' : str) -> Just str
147 lookup_def_int sw def = case (lookup_str sw) of
148 Nothing -> def -- Use default
149 Just xx -> try_read sw xx
151 lookup_def_float sw def = case (lookup_str sw) of
152 Nothing -> def -- Use default
153 Just xx -> try_read sw xx
156 try_read :: Read a => String -> String -> a
157 -- (try_read sw str) tries to read s; if it fails, it
158 -- bleats about flag sw
161 ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses
162 [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw))
163 -- ToDo: hack alert. We should really parse the arugments
164 -- and announce errors in a more civilised way.
168 Putting the compiler options into temporary at-files
169 may turn out to be necessary later on if we turn hsc into
170 a pure Win32 application where I think there's a command-line
171 length limit of 255. unpacked_opts understands the @ option.
173 unpacked_opts :: [String]
177 map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts
179 expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
183 opt_IgnoreDotGhci :: Bool
184 opt_IgnoreDotGhci = lookUp (fsLit "-ignore-dot-ghci")
187 opt_SuppressUniques :: Bool
188 opt_SuppressUniques = lookUp (fsLit "-dsuppress-uniques")
189 opt_PprStyle_Debug :: Bool
190 opt_PprStyle_Debug = lookUp (fsLit "-dppr-debug")
191 opt_PprUserLength :: Int
192 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
194 opt_Fuel = lookup_def_int "-dopt-fuel" maxBound
195 opt_NoDebugOutput :: Bool
196 opt_NoDebugOutput = lookUp (fsLit "-dno-debug-output")
200 opt_AutoSccsOnAllToplevs :: Bool
201 opt_AutoSccsOnAllToplevs = lookUp (fsLit "-fauto-sccs-on-all-toplevs")
202 opt_AutoSccsOnExportedToplevs :: Bool
203 opt_AutoSccsOnExportedToplevs = lookUp (fsLit "-fauto-sccs-on-exported-toplevs")
204 opt_AutoSccsOnIndividualCafs :: Bool
205 opt_AutoSccsOnIndividualCafs = lookUp (fsLit "-fauto-sccs-on-individual-cafs")
206 opt_SccProfilingOn :: Bool
207 opt_SccProfilingOn = lookUp (fsLit "-fscc-profiling")
208 opt_DoTickyProfiling :: Bool
209 opt_DoTickyProfiling = WayTicky `elem` (unsafePerformIO $ readIORef v_Ways)
213 opt_Hpc = lookUp (fsLit "-fhpc")
216 opt_DictsStrict :: Bool
217 opt_DictsStrict = lookUp (fsLit "-fdicts-strict")
218 opt_IrrefutableTuples :: Bool
219 opt_IrrefutableTuples = lookUp (fsLit "-firrefutable-tuples")
221 opt_Parallel = lookUp (fsLit "-fparallel")
224 opt_DsMultiTyVar :: Bool
225 opt_DsMultiTyVar = not (lookUp (fsLit "-fno-ds-multi-tyvar"))
228 opt_SpecInlineJoinPoints :: Bool
229 opt_SpecInlineJoinPoints = lookUp (fsLit "-fspec-inline-join-points")
231 opt_SimpleListLiterals :: Bool
232 opt_SimpleListLiterals = lookUp (fsLit "-fsimple-list-literals")
234 opt_NoStateHack :: Bool
235 opt_NoStateHack = lookUp (fsLit "-fno-state-hack")
238 opt_CprOff = lookUp (fsLit "-fcpr-off")
239 -- Switch off CPR analysis in the new demand analyser
240 opt_MaxWorkerArgs :: Int
241 opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int)
243 opt_GranMacros :: Bool
244 opt_GranMacros = lookUp (fsLit "-fgransim")
245 opt_HiVersion :: Integer
246 opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer
247 opt_HistorySize :: Int
248 opt_HistorySize = lookup_def_int "-fhistory-size" 20
249 opt_OmitBlackHoling :: Bool
250 opt_OmitBlackHoling = lookUp (fsLit "-dno-black-holing")
251 opt_StubDeadValues :: Bool
252 opt_StubDeadValues = lookUp (fsLit "-dstub-dead-values")
254 -- Simplifier switches
255 opt_SimplNoPreInlining :: Bool
256 opt_SimplNoPreInlining = lookUp (fsLit "-fno-pre-inlining")
257 -- NoPreInlining is there just to see how bad things
258 -- get if you don't do it!
259 opt_SimplExcessPrecision :: Bool
260 opt_SimplExcessPrecision = lookUp (fsLit "-fexcess-precision")
263 opt_UF_CreationThreshold :: Int
264 opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int)
265 opt_UF_UseThreshold :: Int
266 opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (8::Int) -- Discounts can be big
267 opt_UF_FunAppDiscount :: Int
268 opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn
269 opt_UF_KeenessFactor :: Float
270 opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float)
273 opt_UF_DearOp = ( 4 :: Int)
276 -- Related to linking
278 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
281 opt_PIC = lookUp (fsLit "-fPIC")
284 opt_Static = lookUp (fsLit "-static")
285 opt_Unregisterised :: Bool
286 opt_Unregisterised = lookUp (fsLit "-funregisterised")
288 -- Derived, not a real option. Determines whether we will be compiling
289 -- info tables that reside just before the entry code, or with an
290 -- indirection to the entry code. See TABLES_NEXT_TO_CODE in
291 -- includes/InfoTables.h.
292 tablesNextToCode :: Bool
293 tablesNextToCode = not opt_Unregisterised
294 && cGhcEnableTablesNextToCode == "YES"
296 opt_EmitExternalCore :: Bool
297 opt_EmitExternalCore = lookUp (fsLit "-fext-core")
299 -- Include full span info in error messages, instead of just the start position.
300 opt_ErrorSpans :: Bool
301 opt_ErrorSpans = lookUp (fsLit "-ferror-spans")
304 -- object files and libraries to be linked in are collected here.
305 -- ToDo: perhaps this could be done without a global, it wasn't obvious
306 -- how to do it though --SDM.
307 GLOBAL_VAR(v_Ld_inputs, [], [String])
309 -----------------------------------------------------------------------------
312 -- The central concept of a "way" is that all objects in a given
313 -- program must be compiled in the same "way". Certain options change
314 -- parameters of the virtual machine, eg. profiling adds an extra word
315 -- to the object header, so profiling objects cannot be linked with
316 -- non-profiling objects.
318 -- After parsing the command-line options, we determine which "way" we
319 -- are building - this might be a combination way, eg. profiling+ticky-ticky.
321 -- We then find the "build-tag" associated with this way, and this
322 -- becomes the suffix used to find .hi files and libraries used in
325 GLOBAL_VAR(v_Build_tag, "", String)
327 -- The RTS has its own build tag, because there are some ways that
328 -- affect the RTS only.
329 GLOBAL_VAR(v_RTS_Build_tag, "", String)
358 GLOBAL_VAR(v_Ways, [] ,[WayName])
360 allowed_combination :: [WayName] -> Bool
361 allowed_combination way = and [ x `allowedWith` y
362 | x <- way, y <- way, x < y ]
364 -- Note ordering in these tests: the left argument is
365 -- <= the right argument, according to the Ord instance
368 -- debug is allowed with everything
369 _ `allowedWith` WayDebug = True
370 WayDebug `allowedWith` _ = True
372 WayProf `allowedWith` WayNDP = True
373 WayThreaded `allowedWith` WayProf = True
374 _ `allowedWith` _ = False
377 findBuildTag :: IO [String] -- new options
379 way_names <- readIORef v_Ways
380 let ws = sort (nub way_names)
382 if not (allowed_combination ws)
383 then ghcError (CmdLineError $
384 "combination not supported: " ++
385 foldr1 (\a b -> a ++ '/':b)
386 (map (wayName . lkupWay) ws))
387 else let ways = map lkupWay ws
388 tag = mkBuildTag (filter (not.wayRTSOnly) ways)
389 rts_tag = mkBuildTag ways
390 flags = map wayOpts ways
392 writeIORef v_Build_tag tag
393 writeIORef v_RTS_Build_tag rts_tag
394 return (concat flags)
398 mkBuildTag :: [Way] -> String
399 mkBuildTag ways = concat (intersperse "_" (map wayTag ways))
401 lkupWay :: WayName -> Way
403 case lookup w way_details of
404 Nothing -> error "findBuildTag"
405 Just details -> details
407 isRTSWay :: WayName -> Bool
408 isRTSWay = wayRTSOnly . lkupWay
417 way_details :: [ (WayName, Way) ]
419 [ (WayThreaded, Way "thr" True "Threaded" [
420 #if defined(freebsd_TARGET_OS)
423 -- FreeBSD's default threading library is the KSE-based M:N libpthread,
424 -- which GHC has some problems with. It's currently not clear whether
425 -- the problems are our fault or theirs, but it seems that using the
426 -- alternative 1:1 threading library libthr works around it:
428 #elif defined(solaris2_TARGET_OS)
433 (WayDebug, Way "debug" True "Debug" [] ),
435 (WayProf, Way "p" False "Profiling"
438 , "-optc-DPROFILING" ]),
440 (WayTicky, Way "t" True "Ticky-ticky Profiling"
442 , "-optc-DTICKY_TICKY" ]),
444 -- optl's below to tell linker where to find the PVM library -- HWL
445 (WayPar, Way "mp" False "Parallel"
447 , "-D__PARALLEL_HASKELL__"
449 , "-package concurrent"
451 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
455 -- at the moment we only change the RTS and could share compiler and libs!
456 (WayPar, Way "mt" False "Parallel ticky profiling"
458 , "-D__PARALLEL_HASKELL__"
461 , "-package concurrent"
463 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
467 (WayPar, Way "md" False "Distributed"
469 , "-D__PARALLEL_HASKELL__"
470 , "-D__DISTRIBUTED_HASKELL__"
473 , "-package concurrent"
475 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
479 (WayGran, Way "mg" False "GranSim"
483 , "-package concurrent" ]),
485 (WayNDP, Way "ndp" False "Nested data parallelism"
489 (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]),
490 (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]),
491 (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]),
492 (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]),
493 (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]),
494 (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]),
495 (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]),
496 (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]),
497 (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]),
498 (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]),
499 (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]),
500 (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]),
501 (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]),
502 (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]),
503 (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]),
504 (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]),
505 (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"])