-----------------------------------------------------------------------------
-- Static flags
+-- | Parses GHC's static flags from a list of command line arguments.
+--
+-- These flags are static in the sense that they can be set only once and they
+-- are global, meaning that they affect every instance of GHC running;
+-- multiple GHC threads will use the same flags.
+--
+-- This function must be called before any session is started, i.e., before
+-- the first call to 'GHC.withGhc'.
+--
+-- Static flags are more of a hack and are static for more or less historical
+-- reasons. In the long run, most static flags should eventually become
+-- dynamic flags.
+--
+-- XXX: can we add an auto-generated list of static flags here?
+--
parseStaticFlags :: [Located String] -> IO ([Located String], [Located String])
parseStaticFlags args = do
ready <- readIORef v_opt_C_ready
-- deal with the way flags: the way (eg. prof) gives rise to
-- further flags, some of which might be static.
- way_flags <- findBuildTag
+ way_flags <- getWayFlags
let way_flags' = map (mkGeneralLocated "in way flags") way_flags
-- if we're unregisterised, add some more flags
------- ways --------------------------------------------------------
, Flag "prof" (NoArg (addWay WayProf)) Supported
- , Flag "ticky" (NoArg (addWay WayTicky)) Supported
+ , Flag "eventlog" (NoArg (addWay WayEventLog)) Supported
, Flag "parallel" (NoArg (addWay WayPar)) Supported
, Flag "gransim" (NoArg (addWay WayGran)) Supported
, Flag "smp" (NoArg (addWay WayThreaded))
, Flag "debug" (NoArg (addWay WayDebug)) Supported
, Flag "ndp" (NoArg (addWay WayNDP)) Supported
, Flag "threaded" (NoArg (addWay WayThreaded)) Supported
- -- ToDo: user ways
+
+ , Flag "ticky" (PassFlag (\f -> do addOpt f; addWay WayDebug)) Supported
+ -- -ticky enables ticky-ticky code generation, and also implies -debug which
+ -- is required to get the RTS ticky support.
------ Debugging ----------------------------------------------------
, Flag "dppr-debug" (PassFlag addOpt) Supported
, Flag "dsuppress-uniques" (PassFlag addOpt) Supported
+ , Flag "dsuppress-coercions" (PassFlag addOpt) Supported
, Flag "dppr-user-length" (AnySuffix addOpt) Supported
, Flag "dopt-fuel" (AnySuffix addOpt) Supported
, Flag "dno-debug-output" (PassFlag addOpt) Supported
+ , Flag "dstub-dead-values" (PassFlag addOpt) Supported
-- rest of the debugging flags are dynamic
- --------- Profiling --------------------------------------------------
- , Flag "auto-all" (NoArg (addOpt "-fauto-sccs-on-all-toplevs"))
- Supported
- , Flag "auto" (NoArg (addOpt "-fauto-sccs-on-exported-toplevs"))
- Supported
- , Flag "caf-all" (NoArg (addOpt "-fauto-sccs-on-individual-cafs"))
- Supported
- -- "ignore-sccs" doesn't work (ToDo)
-
- , Flag "no-auto-all" (NoArg (removeOpt "-fauto-sccs-on-all-toplevs"))
- Supported
- , Flag "no-auto" (NoArg (removeOpt "-fauto-sccs-on-exported-toplevs"))
- Supported
- , Flag "no-caf-all" (NoArg (removeOpt "-fauto-sccs-on-individual-cafs"))
- Supported
-
----- Linker --------------------------------------------------------
, Flag "static" (PassFlag addOpt) Supported
- , Flag "dynamic" (NoArg (removeOpt "-static")) Supported
+ , Flag "dynamic" (NoArg (removeOpt "-static" >> addWay WayDyn)) Supported
-- ignored for compat w/ gcc:
, Flag "rdynamic" (NoArg (return ())) Supported
, Flag "Rghc-timing" (NoArg (enableTimingStats)) Supported
------ Compiler flags -----------------------------------------------
+
+ -- -fPIC requires extra checking: only the NCG supports it.
+ -- See also DynFlags.parseDynamicFlags.
+ , Flag "fPIC" (PassFlag setPIC) Supported
+
-- All other "-fno-<blah>" options cancel out "-f<blah>" on the hsc cmdline
, Flag "fno-"
(PrefixPred (\s -> isStaticFlag ("f"++s)) (\s -> removeOpt ("-f"++s)))
Supported
-- Pass all remaining "-f<blah>" options to hsc
- , Flag "f" (AnySuffixPred (isStaticFlag) addOpt)
- Supported
+ , Flag "f" (AnySuffixPred isStaticFlag addOpt) Supported
]
+setPIC :: String -> IO ()
+setPIC | cGhcWithNativeCodeGen == "YES" || cGhcUnregisterised == "YES"
+ = addOpt
+ | otherwise
+ = ghcError $ CmdLineError "-fPIC is not supported on this platform"
+
isStaticFlag :: String -> Bool
isStaticFlag f =
f `elem` [
- "fauto-sccs-on-all-toplevs",
- "fauto-sccs-on-exported-toplevs",
- "fauto-sccs-on-individual-cafs",
"fscc-profiling",
"fdicts-strict",
"fspec-inline-join-points",
"fgransim",
"fno-hi-version-check",
"dno-black-holing",
- "fno-method-sharing",
"fno-state-hack",
+ "fsimple-list-literals",
"fno-ds-multi-tyvar",
"fruntime-types",
"fno-pre-inlining",
"static",
"fhardwire-lib-paths",
"funregisterised",
- "fext-core",
"fcpr-off",
"ferror-spans",
"fPIC",