1 dnl Copyright (c) 1995, 1996, 1997, 1998 2 dnl tising materials mentioning 3 dnl dnl features or use of this software display the following acknowledgement: 4 dnl dnl ``This product includes software developed by the University of California, 5 dnl dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 6 dnl dnl the University nor the names of its contributors may be used to endorse 7 dnl dnl or promote products derived from this software without specific prior 8 dnl dnl written permission. 9 dnl dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 10 dnl dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 11 dnl dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 12 dnl dnl 13 dnl dnl LBL autoconf macros 14 dnl dnl 15 dnl 16 dnl 17 dnl Checks to see if the sockaddr struct has the 4.4 BSD sa_len member 18 dnl borrowed from LBL libpcap 19 AC_DEFUN([AC_CHECK_SA_LEN], [ 20 AC_MSG_CHECKING(if sockaddr struct has sa_len member) 21 AC_CACHE_VAL($1, 22 AC_TRY_COMPILE([ 23 # include <sys/types.h> 24 # include <sys/socket.h>], 25 [u_int i = sizeof(((struct sockaddr *)0)->sa_len)], 26 $1=yes, 27 $1=no)) 28 AC_MSG_RESULT($$1) 29 if test $$1 = yes ; then 30 AC_DEFINE([HAVE_SOCKADDR_SA_LEN],1,[Define if struct sockaddr has the sa_len member]) 31 fi 32 ]) 33
