Index: /mpich2/trunk/confdb/aclocal_cc.m4
===================================================================
--- /mpich2/trunk/confdb/aclocal_cc.m4 (revision 4864)
+++ /mpich2/trunk/confdb/aclocal_cc.m4 (revision 4866)
@@ -1097,12 +1097,12 @@
     pac_cc_strict_flags=""
     case "$1" in 
-        yes|all)
+        yes|all|posix)
+		enable_strict_done="yes"
+		pac_cc_strict_flags="$pac_common_strict_flags -D_POSIX_C_SOURCE=199506L"
+        ;;
+
+        noposix)
 		enable_strict_done="yes"
 		pac_cc_strict_flags="$pac_common_strict_flags"
-        ;;
-
-        posix)
-		enable_strict_done="yes"
-		pac_cc_strict_flags="$pac_common_strict_flags -D_POSIX_C_SOURCE=199506L"
         ;;