+dnl Checks for struct rtnl_link_stats64.
+dnl
+dnl (OVS checks for this structure in both kernel and userspace headers. This
+dnl is not redundant, because the kernel and userspace builds have completely
+dnl different include paths. It is possible for the kernel to have this
+dnl structure but not userspace, and vice versa.)
+AC_DEFUN([OVS_CHECK_RTNL_LINK_STATS64],
+ [AC_REQUIRE([OVS_CHECK_NETLINK])
+ if test $HAVE_NETLINK = yes; then
+ AC_CHECK_MEMBER(
+ [struct rtnl_link_stats64.tx_packets],
+ [AC_DEFINE([HAVE_RTNL_LINK_STATS64], [1],
+ [Define to 1 if <linux/if_link.h> defines
+ struct rtnl_link_stats64.])],
+ [], [#include <sys/socket.h> /* Provides sa_family_t. */
+#include <linux/if_link.h>
+])
+ fi])
+