{-# OPTIONS -fno-cse #-} -- -fno-cse is needed for GLOBAL_VAR's to behave properly ----------------------------------------------------------------------------- -- -- Static flags -- -- Static flags can only be set once, on the command-line. Inside GHC, -- each static flag corresponds to a top-level value, usually of type Bool. -- -- (c) The University of Glasgow 2005 -- ----------------------------------------------------------------------------- module StaticFlags ( staticFlags, initStaticOpts, -- Ways WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag, isRTSWay, -- Output style options opt_PprUserLength, opt_SuppressUniques, opt_PprStyle_Debug, opt_NoDebugOutput, -- profiling opts opt_SccProfilingOn, -- Hpc opts opt_Hpc, -- language opts opt_DictsStrict, opt_IrrefutableTuples, opt_Parallel, -- optimisation opts opt_DsMultiTyVar, opt_NoStateHack, opt_SimpleListLiterals, opt_SpecInlineJoinPoints, opt_CprOff, opt_SimplNoPreInlining, opt_SimplExcessPrecision, opt_MaxWorkerArgs, -- Unfolding control opt_UF_CreationThreshold, opt_UF_UseThreshold, opt_UF_FunAppDiscount, opt_UF_KeenessFactor, opt_UF_DearOp, -- Optimization fuel controls opt_Fuel, -- Related to linking opt_PIC, opt_Static, -- misc opts opt_IgnoreDotGhci, opt_ErrorSpans, opt_GranMacros, opt_HiVersion, opt_HistorySize, opt_OmitBlackHoling, opt_Unregisterised, v_Ld_inputs, tablesNextToCode, opt_StubDeadValues, -- For the parser addOpt, removeOpt, addWay, findBuildTag, v_opt_C_ready ) where #include "HsVersions.h" import Config import FastString import Util import Maybes ( firstJust ) import Panic import Data.IORef import System.IO.Unsafe ( unsafePerformIO ) import Data.List ----------------------------------------------------------------------------- -- Static flags initStaticOpts :: IO () initStaticOpts = writeIORef v_opt_C_ready True addOpt :: String -> IO () addOpt = consIORef v_opt_C addWay :: WayName -> IO () addWay = consIORef v_Ways removeOpt :: String -> IO () removeOpt f = do fs <- readIORef v_opt_C writeIORef v_opt_C $! filter (/= f) fs lookUp :: FastString -> Bool lookup_def_int :: String -> Int -> Int lookup_def_float :: String -> Float -> Float lookup_str :: String -> Maybe String -- holds the static opts while they're being collected, before -- being unsafely read by unpacked_static_opts below. GLOBAL_VAR(v_opt_C, defaultStaticOpts, [String]) GLOBAL_VAR(v_opt_C_ready, False, Bool) staticFlags :: [String] staticFlags = unsafePerformIO $ do ready <- readIORef v_opt_C_ready if (not ready) then panic "Static flags have not been initialised!\n Please call GHC.newSession or GHC.parseStaticFlags early enough." else readIORef v_opt_C -- -static is the default defaultStaticOpts :: [String] defaultStaticOpts = ["-static"] packed_static_opts :: [FastString] packed_static_opts = map mkFastString staticFlags lookUp sw = sw `elem` packed_static_opts -- (lookup_str "foo") looks for the flag -foo=X or -fooX, -- and returns the string X lookup_str sw = case firstJust (map (stripPrefix sw) staticFlags) of Just ('=' : str) -> Just str Just str -> Just str Nothing -> Nothing lookup_def_int sw def = case (lookup_str sw) of Nothing -> def -- Use default Just xx -> try_read sw xx lookup_def_float sw def = case (lookup_str sw) of Nothing -> def -- Use default Just xx -> try_read sw xx try_read :: Read a => String -> String -> a -- (try_read sw str) tries to read s; if it fails, it -- bleats about flag sw try_read sw str = case reads str of ((x,_):_) -> x -- Be forgiving: ignore trailing goop, and alternative parses [] -> ghcError (UsageError ("Malformed argument " ++ str ++ " for flag " ++ sw)) -- ToDo: hack alert. We should really parse the arugments -- and announce errors in a more civilised way. {- Putting the compiler options into temporary at-files may turn out to be necessary later on if we turn hsc into a pure Win32 application where I think there's a command-line length limit of 255. unpacked_opts understands the @ option. unpacked_opts :: [String] unpacked_opts = concat $ map (expandAts) $ map unpackFS argv -- NOT ARGV any more: v_Static_hsc_opts where expandAts ('@':fname) = words (unsafePerformIO (readFile fname)) expandAts l = [l] -} opt_IgnoreDotGhci :: Bool opt_IgnoreDotGhci = lookUp (fsLit "-ignore-dot-ghci") -- debugging opts opt_SuppressUniques :: Bool opt_SuppressUniques = lookUp (fsLit "-dsuppress-uniques") opt_PprStyle_Debug :: Bool opt_PprStyle_Debug = lookUp (fsLit "-dppr-debug") opt_PprUserLength :: Int opt_PprUserLength = lookup_def_int "-dppr-user-length" 5 --ToDo: give this a name opt_Fuel :: Int opt_Fuel = lookup_def_int "-dopt-fuel" maxBound opt_NoDebugOutput :: Bool opt_NoDebugOutput = lookUp (fsLit "-dno-debug-output") -- profiling opts opt_SccProfilingOn :: Bool opt_SccProfilingOn = lookUp (fsLit "-fscc-profiling") -- Hpc opts opt_Hpc :: Bool opt_Hpc = lookUp (fsLit "-fhpc") -- language opts opt_DictsStrict :: Bool opt_DictsStrict = lookUp (fsLit "-fdicts-strict") opt_IrrefutableTuples :: Bool opt_IrrefutableTuples = lookUp (fsLit "-firrefutable-tuples") opt_Parallel :: Bool opt_Parallel = lookUp (fsLit "-fparallel") -- optimisation opts opt_DsMultiTyVar :: Bool opt_DsMultiTyVar = not (lookUp (fsLit "-fno-ds-multi-tyvar")) -- On by default opt_SpecInlineJoinPoints :: Bool opt_SpecInlineJoinPoints = lookUp (fsLit "-fspec-inline-join-points") opt_SimpleListLiterals :: Bool opt_SimpleListLiterals = lookUp (fsLit "-fsimple-list-literals") opt_NoStateHack :: Bool opt_NoStateHack = lookUp (fsLit "-fno-state-hack") opt_CprOff :: Bool opt_CprOff = lookUp (fsLit "-fcpr-off") -- Switch off CPR analysis in the new demand analyser opt_MaxWorkerArgs :: Int opt_MaxWorkerArgs = lookup_def_int "-fmax-worker-args" (10::Int) opt_GranMacros :: Bool opt_GranMacros = lookUp (fsLit "-fgransim") opt_HiVersion :: Integer opt_HiVersion = read (cProjectVersionInt ++ cProjectPatchLevel) :: Integer opt_HistorySize :: Int opt_HistorySize = lookup_def_int "-fhistory-size" 20 opt_OmitBlackHoling :: Bool opt_OmitBlackHoling = lookUp (fsLit "-dno-black-holing") opt_StubDeadValues :: Bool opt_StubDeadValues = lookUp (fsLit "-dstub-dead-values") -- Simplifier switches opt_SimplNoPreInlining :: Bool opt_SimplNoPreInlining = lookUp (fsLit "-fno-pre-inlining") -- NoPreInlining is there just to see how bad things -- get if you don't do it! opt_SimplExcessPrecision :: Bool opt_SimplExcessPrecision = lookUp (fsLit "-fexcess-precision") -- Unfolding control opt_UF_CreationThreshold :: Int opt_UF_CreationThreshold = lookup_def_int "-funfolding-creation-threshold" (45::Int) opt_UF_UseThreshold :: Int opt_UF_UseThreshold = lookup_def_int "-funfolding-use-threshold" (6::Int) -- Discounts can be big opt_UF_FunAppDiscount :: Int opt_UF_FunAppDiscount = lookup_def_int "-funfolding-fun-discount" (6::Int) -- It's great to inline a fn opt_UF_KeenessFactor :: Float opt_UF_KeenessFactor = lookup_def_float "-funfolding-keeness-factor" (1.5::Float) opt_UF_DearOp :: Int opt_UF_DearOp = ( 4 :: Int) -- Related to linking opt_PIC :: Bool #if darwin_TARGET_OS && x86_64_TARGET_ARCH opt_PIC = True #else opt_PIC = lookUp (fsLit "-fPIC") #endif opt_Static :: Bool opt_Static = lookUp (fsLit "-static") opt_Unregisterised :: Bool opt_Unregisterised = lookUp (fsLit "-funregisterised") -- Derived, not a real option. Determines whether we will be compiling -- info tables that reside just before the entry code, or with an -- indirection to the entry code. See TABLES_NEXT_TO_CODE in -- includes/InfoTables.h. tablesNextToCode :: Bool tablesNextToCode = not opt_Unregisterised && cGhcEnableTablesNextToCode == "YES" -- Include full span info in error messages, instead of just the start position. opt_ErrorSpans :: Bool opt_ErrorSpans = lookUp (fsLit "-ferror-spans") -- object files and libraries to be linked in are collected here. -- ToDo: perhaps this could be done without a global, it wasn't obvious -- how to do it though --SDM. GLOBAL_VAR(v_Ld_inputs, [], [String]) ----------------------------------------------------------------------------- -- Ways -- The central concept of a "way" is that all objects in a given -- program must be compiled in the same "way". Certain options change -- parameters of the virtual machine, eg. profiling adds an extra word -- to the object header, so profiling objects cannot be linked with -- non-profiling objects. -- After parsing the command-line options, we determine which "way" we -- are building - this might be a combination way, eg. profiling+ticky-ticky. -- We then find the "build-tag" associated with this way, and this -- becomes the suffix used to find .hi files and libraries used in -- this compilation. GLOBAL_VAR(v_Build_tag, "", String) -- The RTS has its own build tag, because there are some ways that -- affect the RTS only. GLOBAL_VAR(v_RTS_Build_tag, "", String) data WayName = WayThreaded | WayDebug | WayProf | WayEventLog | WayTicky | WayPar | WayGran | WayNDP | WayUser_a | WayUser_b | WayUser_c | WayUser_d | WayUser_e | WayUser_f | WayUser_g | WayUser_h | WayUser_i | WayUser_j | WayUser_k | WayUser_l | WayUser_m | WayUser_n | WayUser_o | WayUser_A | WayUser_B deriving (Eq,Ord) GLOBAL_VAR(v_Ways, [] ,[WayName]) allowed_combination :: [WayName] -> Bool allowed_combination way = and [ x `allowedWith` y | x <- way, y <- way, x < y ] where -- Note ordering in these tests: the left argument is -- <= the right argument, according to the Ord instance -- on Way above. -- debug is allowed with everything _ `allowedWith` WayDebug = True WayDebug `allowedWith` _ = True WayProf `allowedWith` WayNDP = True WayThreaded `allowedWith` WayProf = True WayThreaded `allowedWith` WayEventLog = True _ `allowedWith` _ = False findBuildTag :: IO [String] -- new options findBuildTag = do way_names <- readIORef v_Ways let ws = sort (nub way_names) if not (allowed_combination ws) then ghcError (CmdLineError $ "combination not supported: " ++ foldr1 (\a b -> a ++ '/':b) (map (wayName . lkupWay) ws)) else let ways = map lkupWay ws tag = mkBuildTag (filter (not.wayRTSOnly) ways) rts_tag = mkBuildTag ways flags = map wayOpts ways in do writeIORef v_Build_tag tag writeIORef v_RTS_Build_tag rts_tag return (concat flags) mkBuildTag :: [Way] -> String mkBuildTag ways = concat (intersperse "_" (map wayTag ways)) lkupWay :: WayName -> Way lkupWay w = case lookup w way_details of Nothing -> error "findBuildTag" Just details -> details isRTSWay :: WayName -> Bool isRTSWay = wayRTSOnly . lkupWay data Way = Way { wayTag :: String, wayRTSOnly :: Bool, wayName :: String, wayOpts :: [String] } way_details :: [ (WayName, Way) ] way_details = [ (WayThreaded, Way "thr" True "Threaded" [ #if defined(freebsd_TARGET_OS) -- "-optc-pthread" -- , "-optl-pthread" -- FreeBSD's default threading library is the KSE-based M:N libpthread, -- which GHC has some problems with. It's currently not clear whether -- the problems are our fault or theirs, but it seems that using the -- alternative 1:1 threading library libthr works around it: "-optl-lthr" #elif defined(solaris2_TARGET_OS) "-optl-lrt" #endif ] ), (WayDebug, Way "debug" True "Debug" [] ), (WayProf, Way "p" False "Profiling" [ "-fscc-profiling" , "-DPROFILING" , "-optc-DPROFILING" ]), (WayEventLog, Way "l" True "RTS Event Logging" [ "-DEVENTLOG" , "-optc-DEVENTLOG" ]), (WayTicky, Way "t" True "Ticky-ticky Profiling" [ "-DTICKY_TICKY" , "-optc-DTICKY_TICKY" ]), -- optl's below to tell linker where to find the PVM library -- HWL (WayPar, Way "mp" False "Parallel" [ "-fparallel" , "-D__PARALLEL_HASKELL__" , "-optc-DPAR" , "-package concurrent" , "-optc-w" , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}" , "-optl-lpvm3" , "-optl-lgpvm3" ]), -- at the moment we only change the RTS and could share compiler and libs! (WayPar, Way "mt" False "Parallel ticky profiling" [ "-fparallel" , "-D__PARALLEL_HASKELL__" , "-optc-DPAR" , "-optc-DPAR_TICKY" , "-package concurrent" , "-optc-w" , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}" , "-optl-lpvm3" , "-optl-lgpvm3" ]), (WayPar, Way "md" False "Distributed" [ "-fparallel" , "-D__PARALLEL_HASKELL__" , "-D__DISTRIBUTED_HASKELL__" , "-optc-DPAR" , "-optc-DDIST" , "-package concurrent" , "-optc-w" , "-optl-L${PVM_ROOT}/lib/${PVM_ARCH}" , "-optl-lpvm3" , "-optl-lgpvm3" ]), (WayGran, Way "mg" False "GranSim" [ "-fgransim" , "-D__GRANSIM__" , "-optc-DGRAN" , "-package concurrent" ]), (WayNDP, Way "ndp" False "Nested data parallelism" [ "-XParr" , "-fvectorise"]), (WayUser_a, Way "a" False "User way 'a'" ["$WAY_a_REAL_OPTS"]), (WayUser_b, Way "b" False "User way 'b'" ["$WAY_b_REAL_OPTS"]), (WayUser_c, Way "c" False "User way 'c'" ["$WAY_c_REAL_OPTS"]), (WayUser_d, Way "d" False "User way 'd'" ["$WAY_d_REAL_OPTS"]), (WayUser_e, Way "e" False "User way 'e'" ["$WAY_e_REAL_OPTS"]), (WayUser_f, Way "f" False "User way 'f'" ["$WAY_f_REAL_OPTS"]), (WayUser_g, Way "g" False "User way 'g'" ["$WAY_g_REAL_OPTS"]), (WayUser_h, Way "h" False "User way 'h'" ["$WAY_h_REAL_OPTS"]), (WayUser_i, Way "i" False "User way 'i'" ["$WAY_i_REAL_OPTS"]), (WayUser_j, Way "j" False "User way 'j'" ["$WAY_j_REAL_OPTS"]), (WayUser_k, Way "k" False "User way 'k'" ["$WAY_k_REAL_OPTS"]), (WayUser_l, Way "l" False "User way 'l'" ["$WAY_l_REAL_OPTS"]), (WayUser_m, Way "m" False "User way 'm'" ["$WAY_m_REAL_OPTS"]), (WayUser_n, Way "n" False "User way 'n'" ["$WAY_n_REAL_OPTS"]), (WayUser_o, Way "o" False "User way 'o'" ["$WAY_o_REAL_OPTS"]), (WayUser_A, Way "A" False "User way 'A'" ["$WAY_A_REAL_OPTS"]), (WayUser_B, Way "B" False "User way 'B'" ["$WAY_B_REAL_OPTS"]) ]