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dnl
dnl Contains the following macros
dnl BJNP_CHECK_IPV6
dnl
#
# Check for AF_INET6, determines whether or not to enable IPv6 support
# Check for ss_family member in struct sockaddr_storage
# Taken from sane-backends
AC_DEFUN([BJNP_CHECK_IPV6],
[
AC_MSG_CHECKING([whether to enable IPv6])
AC_ARG_ENABLE(ipv6,
AC_HELP_STRING([--disable-ipv6],[disable IPv6 support]),
[ if test "$enableval" = "no" ; then
AC_MSG_RESULT([no, manually disabled])
ipv6=no
fi
])
if test "$ipv6" != "no" ; then
AC_TRY_COMPILE([
#define INET6
#include <sys/types.h>
#include <sys/socket.h> ], [
/* AF_INET6 available check */
if (socket(AF_INET6, SOCK_STREAM, 0) < 0)
exit(1);
else
exit(0);
],[
AC_MSG_RESULT(yes)
AC_DEFINE([ENABLE_IPV6], 1, [Define to 1 if the system supports IPv6])
ipv6=yes
],[
AC_MSG_RESULT([no (couldn't compile test program)])
ipv6=no
])
fi
if test "$ipv6" != "no" ; then
AC_MSG_CHECKING([whether struct sockaddr_storage has an ss_family member])
AC_TRY_COMPILE([
#define INET6
#include <sys/types.h>
#include <sys/socket.h> ], [
/* test if the ss_family member exists in struct sockaddr_storage */
struct sockaddr_storage ss;
ss.ss_family = AF_INET;
exit (0);
], [
AC_MSG_RESULT(yes)
AC_DEFINE([HAS_SS_FAMILY], 1, [Define to 1 if struct sockaddr_storage has an ss_family member])
], [
AC_TRY_COMPILE([
#define INET6
#include <sys/types.h>
#include <sys/socket.h> ], [
/* test if the __ss_family member exists in struct sockaddr_storage */
struct sockaddr_storage ss;
ss.__ss_family = AF_INET;
exit (0);
], [
AC_MSG_RESULT([no, but __ss_family exists])
AC_DEFINE([HAS___SS_FAMILY], 1, [Define to 1 if struct sockaddr_storage has __ss_family instead of ss_family])
], [
AC_MSG_RESULT([no])
ipv6=no
])
])
fi
])
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