From ff91258cdc66148172e8533ebd115a836aa67b1b Mon Sep 17 00:00:00 2001
From: Simon Marlow <simonmar@microsoft.com>
Date: Thu, 10 May 2007 15:45:42 +0000
Subject: [PATCH] FIX #1181: parseStaticFlags should not be required

- parseStaticFlags is now not required, but if it is called, it should
  be called only once and before newSession, otherwise you get an
  error.
- parseStaticFlags is exported from GHC
---
 compiler/main/GHC.hs         |    3 +++
 compiler/main/StaticFlags.hs |    6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/compiler/main/GHC.hs b/compiler/main/GHC.hs
index a850650..20c2aee 100644
--- a/compiler/main/GHC.hs
+++ b/compiler/main/GHC.hs
@@ -19,6 +19,7 @@ module GHC (
 	parseDynamicFlags,
 	getSessionDynFlags,
 	setSessionDynFlags,
+        parseStaticFlags,
 
 	-- * Targets
 	Target(..), TargetId(..), Phase,
@@ -231,6 +232,7 @@ import Finder
 import HscMain          ( newHscEnv, hscFileCheck, HscChecked(..) )
 import HscTypes
 import DynFlags
+import StaticFlags
 import SysTools     ( initSysTools, cleanTempFiles, cleanTempFilesExcept,
                       cleanTempDirs )
 import Module
@@ -338,6 +340,7 @@ newSession mb_top_dir = do
   modifyMVar_ interruptTargetThread (return . (main_thread :))
   installSignalHandlers
 
+  initStaticOpts
   dflags0 <- initSysTools mb_top_dir defaultDynFlags
   dflags  <- initDynFlags dflags0
   env <- newHscEnv dflags
diff --git a/compiler/main/StaticFlags.hs b/compiler/main/StaticFlags.hs
index 1fa8388..0d17af2 100644
--- a/compiler/main/StaticFlags.hs
+++ b/compiler/main/StaticFlags.hs
@@ -12,6 +12,7 @@
 module StaticFlags (
 	parseStaticFlags,
 	staticFlags,
+        initStaticOpts,
 
 	-- Ways
 	WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag, isRTSWay,
@@ -92,6 +93,9 @@ import Data.List	( sort, intersperse, nub )
 
 parseStaticFlags :: [String] -> IO [String]
 parseStaticFlags args = do
+  ready <- readIORef v_opt_C_ready
+  when ready $ throwDyn (ProgramError "Too late for parseStaticFlags: call it before newSession")
+
   (leftover, errs) <- processArgs static_flags args
   when (not (null errs)) $ throwDyn (UsageError (unlines errs))
 
@@ -118,6 +122,8 @@ parseStaticFlags args = do
   when (not (null errs)) $ ghcError (UsageError (unlines errs))
   return (cg_flags++more_leftover++leftover)
 
+initStaticOpts :: IO ()
+initStaticOpts = writeIORef v_opt_C_ready True
 
 static_flags :: [(String, OptKind IO)]
 -- All the static flags should appear in this list.  It describes how each
-- 
1.7.10.4