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,
44 opt_PassCaseBndrToJoinPoints,
47 opt_SimpleListLiterals,
48 opt_SpecInlineJoinPoints,
50 opt_SimplNoPreInlining,
51 opt_SimplExcessPrecision,
55 opt_UF_CreationThreshold,
57 opt_UF_FunAppDiscount,
61 -- Optimization fuel controls
82 addOpt, removeOpt, addWay, findBuildTag, v_opt_C_ready
85 #include "HsVersions.h"
90 import Maybes ( firstJust )
94 import System.IO.Unsafe ( unsafePerformIO )
97 -----------------------------------------------------------------------------
100 initStaticOpts :: IO ()
101 initStaticOpts = writeIORef v_opt_C_ready True
103 addOpt :: String -> IO ()
104 addOpt = consIORef v_opt_C
106 addWay :: WayName -> IO ()
107 addWay = consIORef v_Ways
109 removeOpt :: String -> IO ()
111 fs <- readIORef v_opt_C
112 writeIORef v_opt_C $! filter (/= f) fs
114 lookUp :: FastString -> Bool
115 lookup_def_int :: String -> Int -> Int
116 lookup_def_float :: String -> Float -> Float
117 lookup_str :: String -> Maybe String
119 -- holds the static opts while they're being collected, before
120 -- being unsafely read by unpacked_static_opts below.
121 GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String])
122 GLOBAL_VAR(v_opt_C_ready, False, Bool)
124 staticFlags :: [String]
125 staticFlags = unsafePerformIO $ do
126 ready <- readIORef v_opt_C_ready
128 then panic "Static flags have not been initialised!\n Please call GHC.newSession or GHC.parseStaticFlags early enough."
129 else readIORef v_opt_C
131 -- -static is the default
132 defaultStaticOpts :: [String]
133 defaultStaticOpts = ["-static"]
135 packed_static_opts :: [FastString]
136 packed_static_opts = map mkFastString staticFlags
138 lookUp sw = sw `elem` packed_static_opts
140 -- (lookup_str "foo") looks for the flag -foo=X or -fooX,
141 -- and returns the string X
143 = case firstJust (map (maybePrefixMatch sw) staticFlags) of
144 Just ('=' : str) -> Just str
148 lookup_def_int sw def = case (lookup_str sw) of
149 Nothing -> def -- Use default
150 Just xx -> try_read sw xx
152 lookup_def_float sw def = case (lookup_str sw) of
153 Nothing -> def -- Use default
154 Just xx -> try_read sw xx
157 try_read :: Read a => String -> String -> a
158 -- (try_read sw str) tries to read s; if it fails, it
159 -- bleats about flag sw
162 ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses
163 [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw))
164 -- ToDo: hack alert. We should really parse the arugments
165 -- and announce errors in a more civilised way.
169 Putting the compiler options into temporary at-files
170 may turn out to be necessary later on if we turn hsc into
171 a pure Win32 application where I think there's a command-line
172 length limit of 255. unpacked_opts understands the @ option.
174 unpacked_opts :: [String]
178 map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts
180 expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
184 opt_IgnoreDotGhci :: Bool
185 opt_IgnoreDotGhci = lookUp (fsLit "-ignore-dot-ghci")
188 opt_SuppressUniques :: Bool
189 opt_SuppressUniques = lookUp (fsLit "-dsuppress-uniques")
190 opt_PprStyle_Debug :: Bool
191 opt_PprStyle_Debug = lookUp (fsLit "-dppr-debug")
192 opt_PprUserLength :: Int
193 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
195 opt_Fuel = lookup_def_int "-dopt-fuel" maxBound
196 opt_NoDebugOutput :: Bool
197 opt_NoDebugOutput = lookUp (fsLit "-dno-debug-output")
201 opt_AutoSccsOnAllToplevs :: Bool
202 opt_AutoSccsOnAllToplevs = lookUp (fsLit "-fauto-sccs-on-all-toplevs")
203 opt_AutoSccsOnExportedToplevs :: Bool
204 opt_AutoSccsOnExportedToplevs = lookUp (fsLit "-fauto-sccs-on-exported-toplevs")
205 opt_AutoSccsOnIndividualCafs :: Bool
206 opt_AutoSccsOnIndividualCafs = lookUp (fsLit "-fauto-sccs-on-individual-cafs")
207 opt_SccProfilingOn :: Bool
208 opt_SccProfilingOn = lookUp (fsLit "-fscc-profiling")
209 opt_DoTickyProfiling :: Bool
210 opt_DoTickyProfiling = WayTicky `elem` (unsafePerformIO $ readIORef v_Ways)
214 opt_Hpc = lookUp (fsLit "-fhpc")
217 opt_DictsStrict :: Bool
218 opt_DictsStrict = lookUp (fsLit "-fdicts-strict")
219 opt_IrrefutableTuples :: Bool
220 opt_IrrefutableTuples = lookUp (fsLit "-firrefutable-tuples")
222 opt_Parallel = lookUp (fsLit "-fparallel")
225 opt_DsMultiTyVar :: Bool
226 opt_DsMultiTyVar = not (lookUp (fsLit "-fno-ds-multi-tyvar"))
229 opt_PassCaseBndrToJoinPoints :: Bool
230 opt_PassCaseBndrToJoinPoints = lookUp (fsLit "-fpass-case-bndr-to-join-points")
232 opt_SpecInlineJoinPoints :: Bool
233 opt_SpecInlineJoinPoints = lookUp (fsLit "-fspec-inline-join-points")
235 opt_SimpleListLiterals :: Bool
236 opt_SimpleListLiterals = lookUp (fsLit "-fsimple-list-literals")
238 opt_NoStateHack :: Bool
239 opt_NoStateHack = lookUp (fsLit "-fno-state-hack")
242 opt_CprOff = lookUp (fsLit "-fcpr-off")
243 -- Switch off CPR analysis in the new demand analyser
244 opt_MaxWorkerArgs :: Int
245 opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int)
247 opt_GranMacros :: Bool
248 opt_GranMacros = lookUp (fsLit "-fgransim")
249 opt_HiVersion :: Integer
250 opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer
251 opt_HistorySize :: Int
252 opt_HistorySize = lookup_def_int "-fhistory-size" 20
253 opt_OmitBlackHoling :: Bool
254 opt_OmitBlackHoling = lookUp (fsLit "-dno-black-holing")
255 opt_StubDeadValues :: Bool
256 opt_StubDeadValues = lookUp (fsLit "-dstub-dead-values")
258 -- Simplifier switches
259 opt_SimplNoPreInlining :: Bool
260 opt_SimplNoPreInlining = lookUp (fsLit "-fno-pre-inlining")
261 -- NoPreInlining is there just to see how bad things
262 -- get if you don't do it!
263 opt_SimplExcessPrecision :: Bool
264 opt_SimplExcessPrecision = lookUp (fsLit "-fexcess-precision")
267 opt_UF_CreationThreshold :: Int
268 opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int)
269 opt_UF_UseThreshold :: Int
270 opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (8::Int) -- Discounts can be big
271 opt_UF_FunAppDiscount :: Int
272 opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn
273 opt_UF_KeenessFactor :: Float
274 opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float)
277 opt_UF_DearOp = ( 4 :: Int)
280 -- Related to linking
282 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
285 opt_PIC = lookUp (fsLit "-fPIC")
288 opt_Static = lookUp (fsLit "-static")
289 opt_Unregisterised :: Bool
290 opt_Unregisterised = lookUp (fsLit "-funregisterised")
292 -- Derived, not a real option. Determines whether we will be compiling
293 -- info tables that reside just before the entry code, or with an
294 -- indirection to the entry code. See TABLES_NEXT_TO_CODE in
295 -- includes/InfoTables.h.
296 tablesNextToCode :: Bool
297 tablesNextToCode = not opt_Unregisterised
298 && cGhcEnableTablesNextToCode == "YES"
300 opt_EmitExternalCore :: Bool
301 opt_EmitExternalCore = lookUp (fsLit "-fext-core")
303 -- Include full span info in error messages, instead of just the start position.
304 opt_ErrorSpans :: Bool
305 opt_ErrorSpans = lookUp (fsLit "-ferror-spans")
308 -- object files and libraries to be linked in are collected here.
309 -- ToDo: perhaps this could be done without a global, it wasn't obvious
310 -- how to do it though --SDM.
311 GLOBAL_VAR(v_Ld_inputs, [], [String])
313 -----------------------------------------------------------------------------
316 -- The central concept of a "way" is that all objects in a given
317 -- program must be compiled in the same "way". Certain options change
318 -- parameters of the virtual machine, eg. profiling adds an extra word
319 -- to the object header, so profiling objects cannot be linked with
320 -- non-profiling objects.
322 -- After parsing the command-line options, we determine which "way" we
323 -- are building - this might be a combination way, eg. profiling+ticky-ticky.
325 -- We then find the "build-tag" associated with this way, and this
326 -- becomes the suffix used to find .hi files and libraries used in
329 GLOBAL_VAR(v_Build_tag, "", String)
331 -- The RTS has its own build tag, because there are some ways that
332 -- affect the RTS only.
333 GLOBAL_VAR(v_RTS_Build_tag, "", String)
362 GLOBAL_VAR(v_Ways, [] ,[WayName])
364 allowed_combination :: [WayName] -> Bool
365 allowed_combination way = and [ x `allowedWith` y
366 | x <- way, y <- way, x < y ]
368 -- Note ordering in these tests: the left argument is
369 -- <= the right argument, according to the Ord instance
372 -- debug is allowed with everything
373 _ `allowedWith` WayDebug = True
374 WayDebug `allowedWith` _ = True
376 WayProf `allowedWith` WayNDP = True
377 WayThreaded `allowedWith` WayProf = True
378 _ `allowedWith` _ = False
381 findBuildTag :: IO [String] -- new options
383 way_names <- readIORef v_Ways
384 let ws = sort (nub way_names)
386 if not (allowed_combination ws)
387 then ghcError (CmdLineError $
388 "combination not supported: " ++
389 foldr1 (\a b -> a ++ '/':b)
390 (map (wayName . lkupWay) ws))
391 else let ways = map lkupWay ws
392 tag = mkBuildTag (filter (not.wayRTSOnly) ways)
393 rts_tag = mkBuildTag ways
394 flags = map wayOpts ways
396 writeIORef v_Build_tag tag
397 writeIORef v_RTS_Build_tag rts_tag
398 return (concat flags)
402 mkBuildTag :: [Way] -> String
403 mkBuildTag ways = concat (intersperse "_" (map wayTag ways))
405 lkupWay :: WayName -> Way
407 case lookup w way_details of
408 Nothing -> error "findBuildTag"
409 Just details -> details
411 isRTSWay :: WayName -> Bool
412 isRTSWay = wayRTSOnly . lkupWay
421 way_details :: [ (WayName, Way) ]
423 [ (WayThreaded, Way "thr" True "Threaded" [
424 #if defined(freebsd_TARGET_OS)
427 -- FreeBSD's default threading library is the KSE-based M:N libpthread,
428 -- which GHC has some problems with. It's currently not clear whether
429 -- the problems are our fault or theirs, but it seems that using the
430 -- alternative 1:1 threading library libthr works around it:
432 #elif defined(solaris2_TARGET_OS)
437 (WayDebug, Way "debug" True "Debug" [] ),
439 (WayProf, Way "p" False "Profiling"
442 , "-optc-DPROFILING" ]),
444 (WayTicky, Way "t" True "Ticky-ticky Profiling"
446 , "-optc-DTICKY_TICKY" ]),
448 -- optl's below to tell linker where to find the PVM library -- HWL
449 (WayPar, Way "mp" False "Parallel"
451 , "-D__PARALLEL_HASKELL__"
453 , "-package concurrent"
455 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
459 -- at the moment we only change the RTS and could share compiler and libs!
460 (WayPar, Way "mt" False "Parallel ticky profiling"
462 , "-D__PARALLEL_HASKELL__"
465 , "-package concurrent"
467 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
471 (WayPar, Way "md" False "Distributed"
473 , "-D__PARALLEL_HASKELL__"
474 , "-D__DISTRIBUTED_HASKELL__"
477 , "-package concurrent"
479 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
483 (WayGran, Way "mg" False "GranSim"
487 , "-package concurrent" ]),
489 (WayNDP, Way "ndp" False "Nested data parallelism"
493 (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]),
494 (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]),
495 (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]),
496 (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]),
497 (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]),
498 (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]),
499 (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]),
500 (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]),
501 (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]),
502 (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]),
503 (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]),
504 (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]),
505 (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]),
506 (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]),
507 (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]),
508 (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]),
509 (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"])