add a #ifdef around the 6rd code to make it compile with older kernels that do not...

diff --git a/system-linux.c b/system-linux.c
index aaa8230..c4d094d 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -1065,6 +1065,7 @@ int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
        if (tunnel_ioctl(base, SIOCADDTUNNEL, &p) < 0)
                return -1;
 
+#ifdef SIOCADD6RD
        cur = tb[TUNNEL_ATTR_6RD_PREFIX];
        if (cur && is_sit) {
                unsigned int mask;
@@ -1089,6 +1090,7 @@ int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
                        return -1;
                }
        }
+#endif
 
        return 0;
 }