diff -up src/native/unix/configure.s390x src/native/unix/configure
--- src/native/unix/configure.s390x	2009-03-03 12:36:47.000000000 +0100
+++ src/native/unix/configure	2009-03-03 12:37:04.000000000 +0100
@@ -2432,6 +2432,8 @@ echo "$as_me: error: Unsupported operati
     CFLAGS="$CFLAGS -DCPU=\\\"amd64\\\"" ;;
   ia64)
     CFLAGS="$CFLAGS -DCPU=\\\"ia64\\\"" ;;
+  s390*)
+    CFLAGS="$CFLAGS -DCPU=\\\"$host_cpu\\\"" ;;
   bs2000)
     CFLAGS="$CFLAGS -DCPU=\\\"osd\\\" -DCHARSET_EBCDIC -DOSD_POSIX"
     supported_os="osd"