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
79 addOpt, removeOpt, addWay, findBuildTag, v_opt_C_ready
82 #include "HsVersions.h"
87 import Maybes ( firstJust )
91 import System.IO.Unsafe ( unsafePerformIO )
94 -----------------------------------------------------------------------------
97 initStaticOpts :: IO ()
98 initStaticOpts = writeIORef v_opt_C_ready True
100 addOpt :: String -> IO ()
101 addOpt = consIORef v_opt_C
103 addWay :: WayName -> IO ()
104 addWay = consIORef v_Ways
106 removeOpt :: String -> IO ()
108 fs <- readIORef v_opt_C
109 writeIORef v_opt_C $! filter (/= f) fs
111 lookUp :: FastString -> Bool
112 lookup_def_int :: String -> Int -> Int
113 lookup_def_float :: String -> Float -> Float
114 lookup_str :: String -> Maybe String
116 -- holds the static opts while they're being collected, before
117 -- being unsafely read by unpacked_static_opts below.
118 GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String])
119 GLOBAL_VAR(v_opt_C_ready, False, Bool)
121 staticFlags :: [String]
122 staticFlags = unsafePerformIO $ do
123 ready <- readIORef v_opt_C_ready
125 then panic "Static flags have not been initialised!\n Please call GHC.newSession or GHC.parseStaticFlags early enough."
126 else readIORef v_opt_C
128 -- -static is the default
129 defaultStaticOpts :: [String]
130 defaultStaticOpts = ["-static"]
132 packed_static_opts :: [FastString]
133 packed_static_opts = map mkFastString staticFlags
135 lookUp sw = sw `elem` packed_static_opts
137 -- (lookup_str "foo") looks for the flag -foo=X or -fooX,
138 -- and returns the string X
140 = case firstJust (map (maybePrefixMatch sw) staticFlags) of
141 Just ('=' : str) -> Just str
145 lookup_def_int sw def = case (lookup_str sw) of
146 Nothing -> def -- Use default
147 Just xx -> try_read sw xx
149 lookup_def_float sw def = case (lookup_str sw) of
150 Nothing -> def -- Use default
151 Just xx -> try_read sw xx
154 try_read :: Read a => String -> String -> a
155 -- (try_read sw str) tries to read s; if it fails, it
156 -- bleats about flag sw
159 ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses
160 [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw))
161 -- ToDo: hack alert. We should really parse the arugments
162 -- and announce errors in a more civilised way.
166 Putting the compiler options into temporary at-files
167 may turn out to be necessary later on if we turn hsc into
168 a pure Win32 application where I think there's a command-line
169 length limit of 255. unpacked_opts understands the @ option.
171 unpacked_opts :: [String]
175 map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts
177 expandAts ('@':fname) = words (unsafePerformIO (readFile fname))
181 opt_IgnoreDotGhci :: Bool
182 opt_IgnoreDotGhci = lookUp (fsLit "-ignore-dot-ghci")
185 opt_SuppressUniques :: Bool
186 opt_SuppressUniques = lookUp (fsLit "-dsuppress-uniques")
187 opt_PprStyle_Debug :: Bool
188 opt_PprStyle_Debug = lookUp (fsLit "-dppr-debug")
189 opt_PprUserLength :: Int
190 opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name
192 opt_Fuel = lookup_def_int "-dopt-fuel" maxBound
193 opt_NoDebugOutput :: Bool
194 opt_NoDebugOutput = lookUp (fsLit "-dno-debug-output")
198 opt_AutoSccsOnAllToplevs :: Bool
199 opt_AutoSccsOnAllToplevs = lookUp (fsLit "-fauto-sccs-on-all-toplevs")
200 opt_AutoSccsOnExportedToplevs :: Bool
201 opt_AutoSccsOnExportedToplevs = lookUp (fsLit "-fauto-sccs-on-exported-toplevs")
202 opt_AutoSccsOnIndividualCafs :: Bool
203 opt_AutoSccsOnIndividualCafs = lookUp (fsLit "-fauto-sccs-on-individual-cafs")
204 opt_SccProfilingOn :: Bool
205 opt_SccProfilingOn = lookUp (fsLit "-fscc-profiling")
206 opt_DoTickyProfiling :: Bool
207 opt_DoTickyProfiling = WayTicky `elem` (unsafePerformIO $ readIORef v_Ways)
211 opt_Hpc = lookUp (fsLit "-fhpc")
214 opt_DictsStrict :: Bool
215 opt_DictsStrict = lookUp (fsLit "-fdicts-strict")
216 opt_IrrefutableTuples :: Bool
217 opt_IrrefutableTuples = lookUp (fsLit "-firrefutable-tuples")
219 opt_Parallel = lookUp (fsLit "-fparallel")
222 opt_DsMultiTyVar :: Bool
223 opt_DsMultiTyVar = not (lookUp (fsLit "-fno-ds-multi-tyvar"))
226 opt_SpecInlineJoinPoints :: Bool
227 opt_SpecInlineJoinPoints = lookUp (fsLit "-fspec-inline-join-points")
229 opt_NoStateHack :: Bool
230 opt_NoStateHack = lookUp (fsLit "-fno-state-hack")
232 opt_CprOff = lookUp (fsLit "-fcpr-off")
233 -- Switch off CPR analysis in the new demand analyser
234 opt_MaxWorkerArgs :: Int
235 opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int)
237 opt_GranMacros :: Bool
238 opt_GranMacros = lookUp (fsLit "-fgransim")
239 opt_HiVersion :: Integer
240 opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer
241 opt_HistorySize :: Int
242 opt_HistorySize = lookup_def_int "-fhistory-size" 20
243 opt_OmitBlackHoling :: Bool
244 opt_OmitBlackHoling = lookUp (fsLit "-dno-black-holing")
246 -- Simplifier switches
247 opt_SimplNoPreInlining :: Bool
248 opt_SimplNoPreInlining = lookUp (fsLit "-fno-pre-inlining")
249 -- NoPreInlining is there just to see how bad things
250 -- get if you don't do it!
251 opt_SimplExcessPrecision :: Bool
252 opt_SimplExcessPrecision = lookUp (fsLit "-fexcess-precision")
255 opt_UF_CreationThreshold :: Int
256 opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int)
257 opt_UF_UseThreshold :: Int
258 opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (8::Int) -- Discounts can be big
259 opt_UF_FunAppDiscount :: Int
260 opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn
261 opt_UF_KeenessFactor :: Float
262 opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float)
265 opt_UF_DearOp = ( 4 :: Int)
268 -- Related to linking
270 #if darwin_TARGET_OS && x86_64_TARGET_ARCH
273 opt_PIC = lookUp (fsLit "-fPIC")
276 opt_Static = lookUp (fsLit "-static")
277 opt_Unregisterised :: Bool
278 opt_Unregisterised = lookUp (fsLit "-funregisterised")
280 -- Derived, not a real option. Determines whether we will be compiling
281 -- info tables that reside just before the entry code, or with an
282 -- indirection to the entry code. See TABLES_NEXT_TO_CODE in
283 -- includes/InfoTables.h.
284 tablesNextToCode :: Bool
285 tablesNextToCode = not opt_Unregisterised
286 && cGhcEnableTablesNextToCode == "YES"
288 opt_EmitExternalCore :: Bool
289 opt_EmitExternalCore = lookUp (fsLit "-fext-core")
291 -- Include full span info in error messages, instead of just the start position.
292 opt_ErrorSpans :: Bool
293 opt_ErrorSpans = lookUp (fsLit "-ferror-spans")
296 -- object files and libraries to be linked in are collected here.
297 -- ToDo: perhaps this could be done without a global, it wasn't obvious
298 -- how to do it though --SDM.
299 GLOBAL_VAR(v_Ld_inputs, [], [String])
301 -----------------------------------------------------------------------------
304 -- The central concept of a "way" is that all objects in a given
305 -- program must be compiled in the same "way". Certain options change
306 -- parameters of the virtual machine, eg. profiling adds an extra word
307 -- to the object header, so profiling objects cannot be linked with
308 -- non-profiling objects.
310 -- After parsing the command-line options, we determine which "way" we
311 -- are building - this might be a combination way, eg. profiling+ticky-ticky.
313 -- We then find the "build-tag" associated with this way, and this
314 -- becomes the suffix used to find .hi files and libraries used in
317 GLOBAL_VAR(v_Build_tag, "", String)
319 -- The RTS has its own build tag, because there are some ways that
320 -- affect the RTS only.
321 GLOBAL_VAR(v_RTS_Build_tag, "", String)
350 GLOBAL_VAR(v_Ways, [] ,[WayName])
352 allowed_combination :: [WayName] -> Bool
353 allowed_combination way = and [ x `allowedWith` y
354 | x <- way, y <- way, x < y ]
356 -- Note ordering in these tests: the left argument is
357 -- <= the right argument, according to the Ord instance
360 -- debug is allowed with everything
361 _ `allowedWith` WayDebug = True
362 WayDebug `allowedWith` _ = True
364 WayProf `allowedWith` WayNDP = True
365 WayThreaded `allowedWith` WayProf = True
366 _ `allowedWith` _ = False
369 findBuildTag :: IO [String] -- new options
371 way_names <- readIORef v_Ways
372 let ws = sort (nub way_names)
374 if not (allowed_combination ws)
375 then ghcError (CmdLineError $
376 "combination not supported: " ++
377 foldr1 (\a b -> a ++ '/':b)
378 (map (wayName . lkupWay) ws))
379 else let ways = map lkupWay ws
380 tag = mkBuildTag (filter (not.wayRTSOnly) ways)
381 rts_tag = mkBuildTag ways
382 flags = map wayOpts ways
384 writeIORef v_Build_tag tag
385 writeIORef v_RTS_Build_tag rts_tag
386 return (concat flags)
390 mkBuildTag :: [Way] -> String
391 mkBuildTag ways = concat (intersperse "_" (map wayTag ways))
393 lkupWay :: WayName -> Way
395 case lookup w way_details of
396 Nothing -> error "findBuildTag"
397 Just details -> details
399 isRTSWay :: WayName -> Bool
400 isRTSWay = wayRTSOnly . lkupWay
409 way_details :: [ (WayName, Way) ]
411 [ (WayThreaded, Way "thr" True "Threaded" [
412 #if defined(freebsd_TARGET_OS)
415 -- FreeBSD's default threading library is the KSE-based M:N libpthread,
416 -- which GHC has some problems with. It's currently not clear whether
417 -- the problems are our fault or theirs, but it seems that using the
418 -- alternative 1:1 threading library libthr works around it:
420 #elif defined(solaris2_TARGET_OS)
425 (WayDebug, Way "debug" True "Debug" [] ),
427 (WayProf, Way "p" False "Profiling"
430 , "-optc-DPROFILING" ]),
432 (WayTicky, Way "t" True "Ticky-ticky Profiling"
434 , "-optc-DTICKY_TICKY" ]),
436 -- optl's below to tell linker where to find the PVM library -- HWL
437 (WayPar, Way "mp" False "Parallel"
439 , "-D__PARALLEL_HASKELL__"
441 , "-package concurrent"
443 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
447 -- at the moment we only change the RTS and could share compiler and libs!
448 (WayPar, Way "mt" False "Parallel ticky profiling"
450 , "-D__PARALLEL_HASKELL__"
453 , "-package concurrent"
455 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
459 (WayPar, Way "md" False "Distributed"
461 , "-D__PARALLEL_HASKELL__"
462 , "-D__DISTRIBUTED_HASKELL__"
465 , "-package concurrent"
467 , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}"
471 (WayGran, Way "mg" False "GranSim"
475 , "-package concurrent" ]),
477 (WayNDP, Way "ndp" False "Nested data parallelism"
481 (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]),
482 (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]),
483 (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]),
484 (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]),
485 (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]),
486 (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]),
487 (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]),
488 (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]),
489 (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]),
490 (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]),
491 (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]),
492 (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]),
493 (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]),
494 (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]),
495 (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]),
496 (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]),
497 (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"])