X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=Debug%2FTrace.hs;h=742044e4d4c3e1eef013234f23d92500c260a852;hb=487b9d4571a847ee0273b4627aaa135c46a51b8d;hp=accf247e882f234fd4eba7da7df0373d059d4490;hpb=09b9f955bd163776ec5e7f56f9302f55ca1f378c;p=ghc-base.git

diff --git a/Debug/Trace.hs b/Debug/Trace.hs
index accf247..742044e 100644
--- a/Debug/Trace.hs
+++ b/Debug/Trace.hs
@@ -13,9 +13,10 @@
 -----------------------------------------------------------------------------
 
 module Debug.Trace (
-	-- * Tracing
-	putTraceMsg,      -- :: String -> IO ()
-	trace             -- :: String -> a -> a
+        -- * Tracing
+        putTraceMsg,      -- :: String -> IO ()
+        trace,            -- :: String -> a -> a
+        traceShow
   ) where
 
 import Prelude
@@ -40,7 +41,9 @@ putTraceMsg msg = do
      withCString msg  $ \cmsg ->
       debugBelch cfmt cmsg
 
-foreign import ccall unsafe "RtsMessages.h debugBelch"
+-- don't use debugBelch() directly, because we cannot call varargs functions
+-- using the FFI.
+foreign import ccall unsafe "HsBase.h debugBelch2"
    debugBelch :: CString -> CString -> IO ()
 #endif