--- a/config.h.in	

+++ a/config.h.in	

@@ -308,6 +308,9 @@ 

 /* define if your struct sigaction has sa_sigaction */

 #undef HAVE_STRUCT_SIGACTION_SA_SIGACTION

+/* define if you have struct sock_extended_err */

+#undef HAVE_STRUCT_SOCK_EXTENDED_ERR

+

 /* Define if your struct termios has component c_ispeed */

 #undef HAVE_TERMIOS_ISPEED

--- a/configure.in	

+++ a/configure.in	

@@ -80,7 +80,8 @@ AC_HEADER_RESOLV()

 AC_CHECK_HEADERS(termios.h linux/if_tun.h)

 AC_CHECK_HEADERS(net/if_dl.h)

 AC_CHECK_HEADERS(linux/types.h)

-AC_CHECK_HEADER(linux/errqueue.h, AC_DEFINE(HAVE_LINUX_ERRQUEUE_H), [], [#include <linux/types.h>])

+AC_CHECK_HEADER(linux/errqueue.h, AC_DEFINE(HAVE_LINUX_ERRQUEUE_H), [], [#include <sys/time.h>

+#include <linux/types.h>])

 AC_CHECK_HEADERS(sys/utsname.h sys/select.h sys/file.h)

 AC_CHECK_HEADERS(util.h bsd/libutil.h libutil.h sys/stropts.h regex.h)

 AC_CHECK_HEADERS(linux/fs.h linux/ext2_fs.h)

@@ -915,6 +916,22 @@ if test $sc_cv_type_sa_family_t = yes; then

 fi

 AC_MSG_RESULT($sc_cv_type_sa_family_t)

+AC_MSG_CHECKING(for struct sock_extended_err)

+AC_CACHE_VAL(sc_cv_struct_sock_extended_err,

+[AC_TRY_COMPILE([#include <linux/types.h>

+#if TIME_WITH_SYS_TIME

+#include <sys/time.h>

+#endif

+#if HAVE_LINUX_ERRQUEUE_H

+#include <linux/errqueue.h>

+#endif],[struct sock_extended_err s;],

+[sc_cv_struct_sock_extended_err=yes],

+[sc_cv_struct_sock_extended_err=no])])

+if test $sc_cv_struct_sock_extended_err = yes; then

+   AC_DEFINE(HAVE_STRUCT_SOCK_EXTENDED_ERR)

+fi

+AC_MSG_RESULT($sc_cv_struct_sock_extended_err)

+

 AC_MSG_CHECKING(for struct sigaction.sa_sigaction)

 AC_CACHE_VAL(sc_cv_struct_sigaction_sa_sigaction,

 [AC_TRY_COMPILE([#include <signal.h>],[struct sigaction s;s.sa_sigaction=0;],

--- a/xio-ip.c	

+++ a/xio-ip.c	

@@ -503,7 +503,7 @@ int xiolog_ancillary_ip(struct cmsghdr *cmsg, int *num,

       return STAT_OK;

 #endif /* defined(IP_PKTINFO) && HAVE_STRUCT_IN_PKTINFO */

 #endif /* WITH_IP4 */

-#ifdef IP_RECVERR

+#if defined(IP_RECVERR) && HAVE_STRUCT_SOCK_EXTENDED_ERR

    case IP_RECVERR: {

       struct sock_extended_err *err =

 	 (struct sock_extended_err *)CMSG_DATA(cmsg);

@@ -521,7 +521,7 @@ int xiolog_ancillary_ip(struct cmsghdr *cmsg, int *num,

 	       err->ee_code, '\0', err->ee_info, '\0', err->ee_data);

       return STAT_OK;

    }

-#endif /* IP_RECVERR */

+#endif /* defined(IP_RECVERR) && HAVE_STRUCT_SOCK_EXTENDED_ERR */

 #ifdef IP_RECVIF

    case IP_RECVIF: {

       /* spec in FreeBSD: /usr/include/net/if_dl.h */