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AC_CHECK_FUNCS(writev)
AC_CHECK_FUNCS(readv)
AC_CACHE_CHECK([for sin_len in sock],samba_cv_HAVE_SOCK_SIN_LEN,[
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>],
[struct sockaddr_in sock; sock.sin_len = sizeof(sock);],
samba_cv_HAVE_SOCK_SIN_LEN=yes,samba_cv_HAVE_SOCK_SIN_LEN=no)])
if test x"$samba_cv_HAVE_SOCK_SIN_LEN" = x"yes"; then
AC_DEFINE(HAVE_SOCK_SIN_LEN,1,[Whether the sockaddr_in struct has a sin_len property])
fi
############################################
# check for unix domain sockets
AC_CACHE_CHECK([for unix domain sockets],samba_cv_unixsocket, [
AC_TRY_COMPILE([
#include <sys/types.h>
#include <stdlib.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/un.h>],
[
struct sockaddr_un sunaddr;
sunaddr.sun_family = AF_UNIX;
],
samba_cv_unixsocket=yes,samba_cv_unixsocket=no)])
SMB_ENABLE(socket_unix, NO)
if test x"$samba_cv_unixsocket" = x"yes"; then
SMB_ENABLE(socket_unix, YES)
AC_DEFINE(HAVE_UNIXSOCKET,1,[If we need to build with unixscoket support])
fi
dnl test for ipv6 using the gethostbyname2() function. That should be sufficient
dnl for now
AC_CHECK_FUNCS(gethostbyname2, have_ipv6=true, have_ipv6=false)
SMB_ENABLE(socket_ipv6, NO)
if $have_ipv6 = true; then
SMB_ENABLE(socket_ipv6, YES)
AC_DEFINE(HAVE_IPV6,1,[Whether the system has ipv6 support])
fi
dnl don't build ipv6 by default, unless the above test enables it, or
dnl the configure uses --with-static-modules=socket_ipv6
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