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
37 opt_IrrefutableTuples,
43 opt_SimpleListLiterals,
44 opt_SpecInlineJoinPoints,
46 opt_SimplNoPreInlining,
47 opt_SimplExcessPrecision,
51 opt_UF_CreationThreshold,
53 opt_UF_FunAppDiscount,
57 -- Optimization fuel controls
78 addOpt, removeOpt, addWay, findBuildTag, v_opt_C_ready
81 #include "HsVersions.h"
86 import Maybes ( firstJust )
90 import System.IO.Unsafe ( unsafePerformIO )
93 -----------------------------------------------------------------------------
96 initStaticOpts :: IO ()
97 initStaticOpts = writeIORef v_opt_C_ready True
99 addOpt :: String -> IO ()
100 addOpt = consIORef v_opt_C
102 addWay :: WayName -> IO ()
103 addWay = consIORef v_Ways
105 removeOpt :: String -> IO ()
107 fs <- readIORef v_opt_C
108 writeIORef v_opt_C $! filter (/= f) fs
110 lookUp :: FastString -> Bool
111 lookup_def_int :: String -> Int -> Int
112 lookup_def_float :: String -> Float -> Float
113 lookup_str :: String -> Maybe String
115 -- holds the static opts while they're being collected, before
116 -- being unsafely read by unpacked_static_opts below.
117 GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String])
118 GLOBAL_VAR(v_opt_C_ready, False, Bool)
120 staticFlags :: [String]
121 staticFlags = unsafePerformIO $ do
122 ready <- readIORef v_opt_C_ready
124 then panic "Static flags have not been initialised!\n Please call GHC.newSession or GHC.parseStaticFlags early enough."
125 else readIORef v_opt_C
127 -- -static is the default
128 defaultStaticOpts :: [String]
129 defaultStaticOpts = ["-static"]
131 packed_static_opts :: [FastString]
132 packed_static_opts = map mkFastString staticFlags
134 lookUp sw = sw `elem` packed_static_opts
136 -- (lookup_str "foo") looks for the flag -foo=X or -fooX,
137 -- and returns the string X
139 = case firstJust (map (maybePrefixMatch sw) staticFlags) of
140 Just ('=' : str) -> Just str
144 lookup_def_int sw def = case (lookup_str sw) of
145 Nothing -> def -- Use default
146 Just xx -> try_read sw xx
148 lookup_def_float sw def = case (lookup_str sw) of
149 Nothing -> def -- Use default
150 Just xx -> try_read sw xx
153 try_read :: Read a => String -> String -> a
154 -- (try_read sw str) tries to read s; if it fails, it
155 -- bleats about flag sw
158 ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses
159 [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw))
160 -- ToDo: hack alert. We should really parse the arugments
161 -- and announce errors in a more civilised way.
165 Putting the compiler options into temporary at-files
166 may turn out to be necessary later on if we turn hsc into
167 a pure Win32 application where I think there's a command-line
168 length limit of 255. unpacked_opts understands the @ option.
170 unpacked_opts :: [String]
174 map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts
176 expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
180 opt_IgnoreDotGhci :: Bool
181 opt_IgnoreDotGhci = lookUp (fsLit "-ignore-dot-ghci")
184 opt_SuppressUniques :: Bool
185 opt_SuppressUniques = lookUp (fsLit "-dsuppress-uniques")
186 opt_PprStyle_Debug :: Bool
187 opt_PprStyle_Debug = lookUp (fsLit "-dppr-debug")
188 opt_PprUserLength :: Int
189 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
191 opt_Fuel = lookup_def_int "-dopt-fuel" maxBound
192 opt_NoDebugOutput :: Bool
193 opt_NoDebugOutput = lookUp (fsLit "-dno-debug-output")
197 opt_SccProfilingOn :: Bool
198 opt_SccProfilingOn = lookUp (fsLit "-fscc-profiling")
199 opt_DoTickyProfiling :: Bool
200 opt_DoTickyProfiling = WayTicky `elem` (unsafePerformIO $ readIORef v_Ways)
204 opt_Hpc = lookUp (fsLit "-fhpc")
207 opt_DictsStrict :: Bool
208 opt_DictsStrict = lookUp (fsLit "-fdicts-strict")
209 opt_IrrefutableTuples :: Bool
210 opt_IrrefutableTuples = lookUp (fsLit "-firrefutable-tuples")
212 opt_Parallel = lookUp (fsLit "-fparallel")
215 opt_DsMultiTyVar :: Bool
216 opt_DsMultiTyVar = not (lookUp (fsLit "-fno-ds-multi-tyvar"))
219 opt_SpecInlineJoinPoints :: Bool
220 opt_SpecInlineJoinPoints = lookUp (fsLit "-fspec-inline-join-points")
222 opt_SimpleListLiterals :: Bool
223 opt_SimpleListLiterals = lookUp (fsLit "-fsimple-list-literals")
225 opt_NoStateHack :: Bool
226 opt_NoStateHack = lookUp (fsLit "-fno-state-hack")
229 opt_CprOff = lookUp (fsLit "-fcpr-off")
230 -- Switch off CPR analysis in the new demand analyser
231 opt_MaxWorkerArgs :: Int
232 opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int)
234 opt_GranMacros :: Bool
235 opt_GranMacros = lookUp (fsLit "-fgransim")
236 opt_HiVersion :: Integer
237 opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer
238 opt_HistorySize :: Int
239 opt_HistorySize = lookup_def_int "-fhistory-size" 20
240 opt_OmitBlackHoling :: Bool
241 opt_OmitBlackHoling = lookUp (fsLit "-dno-black-holing")
242 opt_StubDeadValues :: Bool
243 opt_StubDeadValues = lookUp (fsLit "-dstub-dead-values")
245 -- Simplifier switches
246 opt_SimplNoPreInlining :: Bool
247 opt_SimplNoPreInlining = lookUp (fsLit "-fno-pre-inlining")
248 -- NoPreInlining is there just to see how bad things
249 -- get if you don't do it!
250 opt_SimplExcessPrecision :: Bool
251 opt_SimplExcessPrecision = lookUp (fsLit "-fexcess-precision")
254 opt_UF_CreationThreshold :: Int
255 opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int)
256 opt_UF_UseThreshold :: Int
257 opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (8::Int) -- Discounts can be big
258 opt_UF_FunAppDiscount :: Int
259 opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn
260 opt_UF_KeenessFactor :: Float
261 opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float)
264 opt_UF_DearOp = ( 4 :: Int)
267 -- Related to linking
269 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
272 opt_PIC = lookUp (fsLit "-fPIC")
275 opt_Static = lookUp (fsLit "-static")
276 opt_Unregisterised :: Bool
277 opt_Unregisterised = lookUp (fsLit "-funregisterised")
279 -- Derived, not a real option. Determines whether we will be compiling
280 -- info tables that reside just before the entry code, or with an
281 -- indirection to the entry code. See TABLES_NEXT_TO_CODE in
282 -- includes/InfoTables.h.
283 tablesNextToCode :: Bool
284 tablesNextToCode = not opt_Unregisterised
285 && cGhcEnableTablesNextToCode == "YES"
287 opt_EmitExternalCore :: Bool
288 opt_EmitExternalCore = lookUp (fsLit "-fext-core")
290 -- Include full span info in error messages, instead of just the start position.
291 opt_ErrorSpans :: Bool
292 opt_ErrorSpans = lookUp (fsLit "-ferror-spans")
295 -- object files and libraries to be linked in are collected here.
296 -- ToDo: perhaps this could be done without a global, it wasn't obvious
297 -- how to do it though --SDM.
298 GLOBAL_VAR(v_Ld_inputs, [], [String])
300 -----------------------------------------------------------------------------
303 -- The central concept of a "way" is that all objects in a given
304 -- program must be compiled in the same "way". Certain options change
305 -- parameters of the virtual machine, eg. profiling adds an extra word
306 -- to the object header, so profiling objects cannot be linked with
307 -- non-profiling objects.
309 -- After parsing the command-line options, we determine which "way" we
310 -- are building - this might be a combination way, eg. profiling+ticky-ticky.
312 -- We then find the "build-tag" associated with this way, and this
313 -- becomes the suffix used to find .hi files and libraries used in
316 GLOBAL_VAR(v_Build_tag, "", String)
318 -- The RTS has its own build tag, because there are some ways that
319 -- affect the RTS only.
320 GLOBAL_VAR(v_RTS_Build_tag, "", String)
349 GLOBAL_VAR(v_Ways, [] ,[WayName])
351 allowed_combination :: [WayName] -> Bool
352 allowed_combination way = and [ x `allowedWith` y
353 | x <- way, y <- way, x < y ]
355 -- Note ordering in these tests: the left argument is
356 -- <= the right argument, according to the Ord instance
359 -- debug is allowed with everything
360 _ `allowedWith` WayDebug = True
361 WayDebug `allowedWith` _ = True
363 WayProf `allowedWith` WayNDP = True
364 WayThreaded `allowedWith` WayProf = True
365 _ `allowedWith` _ = False
368 findBuildTag :: IO [String] -- new options
370 way_names <- readIORef v_Ways
371 let ws = sort (nub way_names)
373 if not (allowed_combination ws)
374 then ghcError (CmdLineError $
375 "combination not supported: " ++
376 foldr1 (\a b -> a ++ '/':b)
377 (map (wayName . lkupWay) ws))
378 else let ways = map lkupWay ws
379 tag = mkBuildTag (filter (not.wayRTSOnly) ways)
380 rts_tag = mkBuildTag ways
381 flags = map wayOpts ways
383 writeIORef v_Build_tag tag
384 writeIORef v_RTS_Build_tag rts_tag
385 return (concat flags)
389 mkBuildTag :: [Way] -> String
390 mkBuildTag ways = concat (intersperse "_" (map wayTag ways))
392 lkupWay :: WayName -> Way
394 case lookup w way_details of
395 Nothing -> error "findBuildTag"
396 Just details -> details
398 isRTSWay :: WayName -> Bool
399 isRTSWay = wayRTSOnly . lkupWay
408 way_details :: [ (WayName, Way) ]
410 [ (WayThreaded, Way "thr" True "Threaded" [
411 #if defined(freebsd_TARGET_OS)
414 -- FreeBSD's default threading library is the KSE-based M:N libpthread,
415 -- which GHC has some problems with. It's currently not clear whether
416 -- the problems are our fault or theirs, but it seems that using the
417 -- alternative 1:1 threading library libthr works around it:
419 #elif defined(solaris2_TARGET_OS)
424 (WayDebug, Way "debug" True "Debug" [] ),
426 (WayProf, Way "p" False "Profiling"
429 , "-optc-DPROFILING" ]),
431 (WayTicky, Way "t" True "Ticky-ticky Profiling"
433 , "-optc-DTICKY_TICKY" ]),
435 -- optl's below to tell linker where to find the PVM library -- HWL
436 (WayPar, Way "mp" False "Parallel"
438 , "-D__PARALLEL_HASKELL__"
440 , "-package concurrent"
442 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
446 -- at the moment we only change the RTS and could share compiler and libs!
447 (WayPar, Way "mt" False "Parallel ticky profiling"
449 , "-D__PARALLEL_HASKELL__"
452 , "-package concurrent"
454 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
458 (WayPar, Way "md" False "Distributed"
460 , "-D__PARALLEL_HASKELL__"
461 , "-D__DISTRIBUTED_HASKELL__"
464 , "-package concurrent"
466 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
470 (WayGran, Way "mg" False "GranSim"
474 , "-package concurrent" ]),
476 (WayNDP, Way "ndp" False "Nested data parallelism"
480 (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]),
481 (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]),
482 (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]),
483 (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]),
484 (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]),
485 (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]),
486 (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]),
487 (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]),
488 (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]),
489 (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]),
490 (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]),
491 (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]),
492 (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]),
493 (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]),
494 (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]),
495 (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]),
496 (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"])