+# For XenServer version >= 6.5, replace kernel_flavor with xen_version which
+# should be the `uname -r` output.
+# for example:
+#
+# rpmbuild -D "openvswitch_version 2.3.0+build123"
+# -D "kernel_name NAME-xen"
+# -D "kernel_version 3.10.41-323.380416"
+# -D "xen_version 3.10.0+2"
+# -bb /usr/src/redhat/SPECS/openvswitch-xen.spec
+#