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_SpecInlineJoinPoints,
48 opt_SimplNoPreInlining,
49 opt_SimplExcessPrecision,
53 opt_UF_CreationThreshold,
55 opt_UF_FunAppDiscount,
59 -- Optimization fuel controls
80 addOpt, removeOpt, addWay, findBuildTag, v_opt_C_ready
83 #include "HsVersions.h"
88 import Maybes ( firstJust )
92 import System.IO.Unsafe ( unsafePerformIO )
95 -----------------------------------------------------------------------------
98 initStaticOpts :: IO ()
99 initStaticOpts = writeIORef v_opt_C_ready True
101 addOpt :: String -> IO ()
102 addOpt = consIORef v_opt_C
104 addWay :: WayName -> IO ()
105 addWay = consIORef v_Ways
107 removeOpt :: String -> IO ()
109 fs <- readIORef v_opt_C
110 writeIORef v_opt_C $! filter (/= f) fs
112 lookUp :: FastString -> Bool
113 lookup_def_int :: String -> Int -> Int
114 lookup_def_float :: String -> Float -> Float
115 lookup_str :: String -> Maybe String
117 -- holds the static opts while they're being collected, before
118 -- being unsafely read by unpacked_static_opts below.
119 GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String])
120 GLOBAL_VAR(v_opt_C_ready, False, Bool)
122 staticFlags :: [String]
123 staticFlags = unsafePerformIO $ do
124 ready <- readIORef v_opt_C_ready
126 then panic "Static flags have not been initialised!\n Please call GHC.newSession or GHC.parseStaticFlags early enough."
127 else readIORef v_opt_C
129 -- -static is the default
130 defaultStaticOpts :: [String]
131 defaultStaticOpts = ["-static"]
133 packed_static_opts :: [FastString]
134 packed_static_opts = map mkFastString staticFlags
136 lookUp sw = sw `elem` packed_static_opts
138 -- (lookup_str "foo") looks for the flag -foo=X or -fooX,
139 -- and returns the string X
141 = case firstJust (map (maybePrefixMatch sw) staticFlags) of
142 Just ('=' : str) -> Just str
146 lookup_def_int sw def = case (lookup_str sw) of
147 Nothing -> def -- Use default
148 Just xx -> try_read sw xx
150 lookup_def_float sw def = case (lookup_str sw) of
151 Nothing -> def -- Use default
152 Just xx -> try_read sw xx
155 try_read :: Read a => String -> String -> a
156 -- (try_read sw str) tries to read s; if it fails, it
157 -- bleats about flag sw
160 ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses
161 [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw))
162 -- ToDo: hack alert. We should really parse the arugments
163 -- and announce errors in a more civilised way.
167 Putting the compiler options into temporary at-files
168 may turn out to be necessary later on if we turn hsc into
169 a pure Win32 application where I think there's a command-line
170 length limit of 255. unpacked_opts understands the @ option.
172 unpacked_opts :: [String]
176 map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts
178 expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
182 opt_IgnoreDotGhci :: Bool
183 opt_IgnoreDotGhci = lookUp (fsLit "-ignore-dot-ghci")
186 opt_SuppressUniques :: Bool
187 opt_SuppressUniques = lookUp (fsLit "-dsuppress-uniques")
188 opt_PprStyle_Debug :: Bool
189 opt_PprStyle_Debug = lookUp (fsLit "-dppr-debug")
190 opt_PprUserLength :: Int
191 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
193 opt_Fuel = lookup_def_int "-dopt-fuel" maxBound
194 opt_NoDebugOutput :: Bool
195 opt_NoDebugOutput = lookUp (fsLit "-dno-debug-output")
199 opt_AutoSccsOnAllToplevs :: Bool
200 opt_AutoSccsOnAllToplevs = lookUp (fsLit "-fauto-sccs-on-all-toplevs")
201 opt_AutoSccsOnExportedToplevs :: Bool
202 opt_AutoSccsOnExportedToplevs = lookUp (fsLit "-fauto-sccs-on-exported-toplevs")
203 opt_AutoSccsOnIndividualCafs :: Bool
204 opt_AutoSccsOnIndividualCafs = lookUp (fsLit "-fauto-sccs-on-individual-cafs")
205 opt_SccProfilingOn :: Bool
206 opt_SccProfilingOn = lookUp (fsLit "-fscc-profiling")
207 opt_DoTickyProfiling :: Bool
208 opt_DoTickyProfiling = WayTicky `elem` (unsafePerformIO $ readIORef v_Ways)
212 opt_Hpc = lookUp (fsLit "-fhpc")
215 opt_DictsStrict :: Bool
216 opt_DictsStrict = lookUp (fsLit "-fdicts-strict")
217 opt_IrrefutableTuples :: Bool
218 opt_IrrefutableTuples = lookUp (fsLit "-firrefutable-tuples")
220 opt_Parallel = lookUp (fsLit "-fparallel")
223 opt_DsMultiTyVar :: Bool
224 opt_DsMultiTyVar = not (lookUp (fsLit "-fno-ds-multi-tyvar"))
227 opt_SpecInlineJoinPoints :: Bool
228 opt_SpecInlineJoinPoints = lookUp (fsLit "-fspec-inline-join-points")
230 opt_NoStateHack :: Bool
231 opt_NoStateHack = lookUp (fsLit "-fno-state-hack")
233 opt_CprOff = lookUp (fsLit "-fcpr-off")
234 -- Switch off CPR analysis in the new demand analyser
235 opt_MaxWorkerArgs :: Int
236 opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int)
238 opt_GranMacros :: Bool
239 opt_GranMacros = lookUp (fsLit "-fgransim")
240 opt_HiVersion :: Integer
241 opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer
242 opt_HistorySize :: Int
243 opt_HistorySize = lookup_def_int "-fhistory-size" 20
244 opt_OmitBlackHoling :: Bool
245 opt_OmitBlackHoling = lookUp (fsLit "-dno-black-holing")
246 opt_StubDeadValues :: Bool
247 opt_StubDeadValues = lookUp (fsLit "-dstub-dead-values")
249 -- Simplifier switches
250 opt_SimplNoPreInlining :: Bool
251 opt_SimplNoPreInlining = lookUp (fsLit "-fno-pre-inlining")
252 -- NoPreInlining is there just to see how bad things
253 -- get if you don't do it!
254 opt_SimplExcessPrecision :: Bool
255 opt_SimplExcessPrecision = lookUp (fsLit "-fexcess-precision")
258 opt_UF_CreationThreshold :: Int
259 opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int)
260 opt_UF_UseThreshold :: Int
261 opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (8::Int) -- Discounts can be big
262 opt_UF_FunAppDiscount :: Int
263 opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn
264 opt_UF_KeenessFactor :: Float
265 opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float)
268 opt_UF_DearOp = ( 4 :: Int)
271 -- Related to linking
273 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
276 opt_PIC = lookUp (fsLit "-fPIC")
279 opt_Static = lookUp (fsLit "-static")
280 opt_Unregisterised :: Bool
281 opt_Unregisterised = lookUp (fsLit "-funregisterised")
283 -- Derived, not a real option. Determines whether we will be compiling
284 -- info tables that reside just before the entry code, or with an
285 -- indirection to the entry code. See TABLES_NEXT_TO_CODE in
286 -- includes/InfoTables.h.
287 tablesNextToCode :: Bool
288 tablesNextToCode = not opt_Unregisterised
289 && cGhcEnableTablesNextToCode == "YES"
291 opt_EmitExternalCore :: Bool
292 opt_EmitExternalCore = lookUp (fsLit "-fext-core")
294 -- Include full span info in error messages, instead of just the start position.
295 opt_ErrorSpans :: Bool
296 opt_ErrorSpans = lookUp (fsLit "-ferror-spans")
299 -- object files and libraries to be linked in are collected here.
300 -- ToDo: perhaps this could be done without a global, it wasn't obvious
301 -- how to do it though --SDM.
302 GLOBAL_VAR(v_Ld_inputs, [], [String])
304 -----------------------------------------------------------------------------
307 -- The central concept of a "way" is that all objects in a given
308 -- program must be compiled in the same "way". Certain options change
309 -- parameters of the virtual machine, eg. profiling adds an extra word
310 -- to the object header, so profiling objects cannot be linked with
311 -- non-profiling objects.
313 -- After parsing the command-line options, we determine which "way" we
314 -- are building - this might be a combination way, eg. profiling+ticky-ticky.
316 -- We then find the "build-tag" associated with this way, and this
317 -- becomes the suffix used to find .hi files and libraries used in
320 GLOBAL_VAR(v_Build_tag, "", String)
322 -- The RTS has its own build tag, because there are some ways that
323 -- affect the RTS only.
324 GLOBAL_VAR(v_RTS_Build_tag, "", String)
353 GLOBAL_VAR(v_Ways, [] ,[WayName])
355 allowed_combination :: [WayName] -> Bool
356 allowed_combination way = and [ x `allowedWith` y
357 | x <- way, y <- way, x < y ]
359 -- Note ordering in these tests: the left argument is
360 -- <= the right argument, according to the Ord instance
363 -- debug is allowed with everything
364 _ `allowedWith` WayDebug = True
365 WayDebug `allowedWith` _ = True
367 WayProf `allowedWith` WayNDP = True
368 WayThreaded `allowedWith` WayProf = True
369 _ `allowedWith` _ = False
372 findBuildTag :: IO [String] -- new options
374 way_names <- readIORef v_Ways
375 let ws = sort (nub way_names)
377 if not (allowed_combination ws)
378 then ghcError (CmdLineError $
379 "combination not supported: " ++
380 foldr1 (\a b -> a ++ '/':b)
381 (map (wayName . lkupWay) ws))
382 else let ways = map lkupWay ws
383 tag = mkBuildTag (filter (not.wayRTSOnly) ways)
384 rts_tag = mkBuildTag ways
385 flags = map wayOpts ways
387 writeIORef v_Build_tag tag
388 writeIORef v_RTS_Build_tag rts_tag
389 return (concat flags)
393 mkBuildTag :: [Way] -> String
394 mkBuildTag ways = concat (intersperse "_" (map wayTag ways))
396 lkupWay :: WayName -> Way
398 case lookup w way_details of
399 Nothing -> error "findBuildTag"
400 Just details -> details
402 isRTSWay :: WayName -> Bool
403 isRTSWay = wayRTSOnly . lkupWay
412 way_details :: [ (WayName, Way) ]
414 [ (WayThreaded, Way "thr" True "Threaded" [
415 #if defined(freebsd_TARGET_OS)
418 -- FreeBSD's default threading library is the KSE-based M:N libpthread,
419 -- which GHC has some problems with. It's currently not clear whether
420 -- the problems are our fault or theirs, but it seems that using the
421 -- alternative 1:1 threading library libthr works around it:
423 #elif defined(solaris2_TARGET_OS)
428 (WayDebug, Way "debug" True "Debug" [] ),
430 (WayProf, Way "p" False "Profiling"
433 , "-optc-DPROFILING" ]),
435 (WayTicky, Way "t" True "Ticky-ticky Profiling"
437 , "-optc-DTICKY_TICKY" ]),
439 -- optl's below to tell linker where to find the PVM library -- HWL
440 (WayPar, Way "mp" False "Parallel"
442 , "-D__PARALLEL_HASKELL__"
444 , "-package concurrent"
446 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
450 -- at the moment we only change the RTS and could share compiler and libs!
451 (WayPar, Way "mt" False "Parallel ticky profiling"
453 , "-D__PARALLEL_HASKELL__"
456 , "-package concurrent"
458 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
462 (WayPar, Way "md" False "Distributed"
464 , "-D__PARALLEL_HASKELL__"
465 , "-D__DISTRIBUTED_HASKELL__"
468 , "-package concurrent"
470 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
474 (WayGran, Way "mg" False "GranSim"
478 , "-package concurrent" ]),
480 (WayNDP, Way "ndp" False "Nested data parallelism"
484 (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]),
485 (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]),
486 (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]),
487 (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]),
488 (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]),
489 (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]),
490 (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]),
491 (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]),
492 (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]),
493 (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]),
494 (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]),
495 (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]),
496 (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]),
497 (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]),
498 (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]),
499 (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]),
500 (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"])