From fb57f87ad779852b3bbcd96617fb211a8821d857 Mon Sep 17 00:00:00 2001
From: Simon Marlow <simonmar@microsoft.com>
Date: Mon, 7 May 2007 10:24:18 +0000
Subject: [PATCH] FIX #1155: ghci -debug generates slightly odd message

---
 compiler/main/Main.hs        |    8 ++++++--
 compiler/main/StaticFlags.hs |    4 +++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/compiler/main/Main.hs b/compiler/main/Main.hs
index 048eee8..d5e8de7 100644
--- a/compiler/main/Main.hs
+++ b/compiler/main/Main.hs
@@ -223,11 +223,15 @@ checkOptions cli_mode dflags srcs objs = do
    let unknown_opts = [ f | (f@('-':_), _) <- srcs ]
    when (notNull unknown_opts) (unknownFlagsErr unknown_opts)
 
+   when (notNull (filter isRTSWay (wayNames dflags))
+         && isInterpretiveMode cli_mode) $
+        putStrLn ("Warning: -debug, -threaded and -ticky are ignored by GHCi")
+
 	-- -prof and --interactive are not a good combination
-   when (notNull (filter (/= WayThreaded) (wayNames dflags))
+   when (notNull (filter (not . isRTSWay) (wayNames dflags))
          && isInterpretiveMode cli_mode) $
       do throwDyn (UsageError 
-                   "--interactive can't be used with -prof, -ticky, or -unreg.")
+                   "--interactive can't be used with -prof or -unreg.")
 	-- -ohi sanity check
    if (isJust (outputHi dflags) && 
       (isCompManagerMode cli_mode || srcs `lengthExceeds` 1))
diff --git a/compiler/main/StaticFlags.hs b/compiler/main/StaticFlags.hs
index 2a8c4dc..1fa8388 100644
--- a/compiler/main/StaticFlags.hs
+++ b/compiler/main/StaticFlags.hs
@@ -14,7 +14,7 @@ module StaticFlags (
 	staticFlags,
 
 	-- Ways
-	WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag,
+	WayName(..), v_Ways, v_Build_tag, v_RTS_Build_tag, isRTSWay,
 
 	-- Output style options
 	opt_PprUserLength,
@@ -512,6 +512,8 @@ lkupWay w =
 	Nothing -> error "findBuildTag"
 	Just details -> details
 
+isRTSWay = wayRTSOnly . lkupWay 
+
 data Way = Way {
   wayTag     :: String,
   wayRTSOnly :: Bool,
-- 
1.7.10.4