nx-match: Update register check functions.

[sliver-openvswitch.git] / m4 / openvswitch.m4

diff --git a/m4/openvswitch.m4 b/m4/openvswitch.m4
index 077c29b..e9edc49 100644 (file)
--- a/m4/openvswitch.m4
+++ b/m4/openvswitch.m4
@@ -1,6 +1,6 @@
 # -*- autoconf -*-
 
-# Copyright (c) 2008, 2009, 2010 Nicira Networks.
+# Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -46,6 +46,25 @@ AC_DEFUN([OVS_CHECK_NDEBUG],
      [ndebug=false])
    AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])])
 
+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])
+
 dnl Checks for Netlink support.
 AC_DEFUN([OVS_CHECK_NETLINK],
   [AC_CHECK_HEADER([linux/netlink.h],
@@ -73,8 +92,7 @@ AC_DEFUN([OVS_CHECK_OPENSSL],
      [ssl=check])
 
    if test "$ssl" != false; then
-       dnl Make sure that pkg-config is installed.
-       m4_pattern_forbid([PKG_CHECK_MODULES])
+       m4_ifndef([PKG_CHECK_MODULES], [m4_fatal([Please install pkg-config.])])
        PKG_CHECK_MODULES([SSL], [openssl], 
          [HAVE_OPENSSL=yes],
          [HAVE_OPENSSL=no
@@ -133,6 +151,11 @@ AC_DEFUN([OVS_CHECK_LOGDIR],
      [LOGDIR='${localstatedir}/log/${PACKAGE}'])
    AC_SUBST([LOGDIR])])
 
+dnl Defines HAVE_BACKTRACE if backtrace() is declared in <execinfo.h>
+dnl and exists in libc.
+AC_DEFUN([OVS_CHECK_BACKTRACE],
+  [AC_CHECK_HEADER([execinfo.h], [AC_CHECK_FUNCS([backtrace])])])
+
 dnl Checks for __malloc_hook, etc., supported by glibc.
 AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
   [AC_CACHE_CHECK(