--- source-trees/gt2-cvs/nexus/source/nexus/pr_mp.c	18 Apr 2005 21:43:19 -0000	1.87
+++ source-trees/gt2-cvs/nexus/source/nexus/pr_mp.c	30 Jan 2008 22:01:42 -0000
@@ -441,7 +441,12 @@
 static int              GLOBUS_NEXUS_MP_PROTOCOL_COUNT(void);
 
 
-#if defined(GLOBUS_USING_THIS_MP_PROTO)
+/* Some implementations of MPI are not thread safe.  While Nexus insures
+   that it does not simultaneously call MPI functions from two different
+   threads, it cannot make that guarantee with respect to other independent
+   modules and itself. */
+#if defined(GLOBUS_USING_THIS_MP_PROTO) && \
+    (defined(BUILD_LITE) || !defined(GLOBUS_MP_HAS_MPI_PROTO))
 
 static nexus_proto_funcs_t mp_proto_funcs =
 {