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MODULE = conftest	PACKAGE = conftest
void
conftest()
	CODE:
	ST(0) = &PL_sv_undef;
EOF
ifelse([$3], , socket6_cv_perl_path='perl', socket6_cv_perl_path=$3)
if { (eval $socket6_cv_perl_path Makefile.PL) 2>&5 >/dev/null; (eval make) 2>&5 >/dev/null; }; then
	socket6_cv_pl_sv_undef='yes'
else
	socket6_cv_pl_sv_undef='no'
fi
cd ..
rm -rf conftest
])
if test $socket6_cv_pl_sv_undef = 'yes'; then
	AC_MSG_RESULT(yes)
	ifelse([$1], , :, [$1])
else
	AC_MSG_RESULT(no)
	ifelse([$2], , :, [$2])
fi
])

dnl IPv6_CHECK_SIN6_SCOPE_ID(VALUE-IF-FOUND , VALUE-IF-NOT-FOUND)
AC_DEFUN([IPv6_CHECK_SIN6_SCOPE_ID], [
AC_MSG_CHECKING([whether you have sin6_scope_id in struct sockaddr_in6])
AC_CACHE_VAL(ipv6_cv_sin6_scope_id, [dnl
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>],
	[struct sockaddr_in6 sin6; int i = sin6.sin6_scope_id;],
	[ipv6_cv_sin6_scope_id=yes], [ipv6_cv_sin6_scope_id=no])])dnl
if test $ipv6_cv_sin6_scope_id = yes; then
  ifelse([$1], , AC_DEFINE(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID,[1],[Do we have a sin6_scope_id in struct sockaddr_in6?]), [$1])
else
  ifelse([$2], , :, [$2])
fi
AC_MSG_RESULT($ipv6_cv_sin6_scope_id)])
dnl
dnl whether you have sa_len in struct sockaddr
AC_DEFUN([IPv6_CHECK_SA_LEN], [
AC_MSG_CHECKING([whether you have sa_len in struct sockaddr])
AC_CACHE_VAL(ipv6_cv_sa_len, [dnl
AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>],
	       [struct sockaddr sa; int i = sa.sa_len;],
	       [ipv6_cv_sa_len=yes], [ipv6_cv_sa_len=no])])dnl
if test $ipv6_cv_sa_len = yes; then
  ifelse([$1], , AC_DEFINE(HAVE_SOCKADDR_SA_LEN,[1],[Does sockaddr have an sa_len?]), [$1])
else
  ifelse([$2], , :, [$2])
fi
AC_MSG_RESULT($ipv6_cv_sa_len)])
dnl
dnl See whether we can use IPv6 related functions
AC_DEFUN([IPv6_CHECK_FUNC], [
AH_TEMPLATE(AS_TR_CPP(HAVE_$1), [Define to 1 if you have the `]$1[' function.])
AC_CHECK_FUNC($1, [dnl
  ac_cv_lib_socket_$1=no
  ac_cv_lib_inet6_$1=no
], [dnl
  AC_CHECK_LIB(socket, $1, [dnl
    LIBS="$LIBS -lsocket -lnsl"
    ac_cv_lib_inet6_$1=no
  ], [dnl
    AC_MSG_CHECKING([whether your system has IPv6 directory])
    AC_CACHE_VAL(ipv6_cv_dir, [dnl
      for ipv6_cv_dir in /usr/local/v6 /usr/inet6 no; do
	if test $ipv6_cv_dir = no -o -d $ipv6_cv_dir; then
	  break
	fi
      done])dnl
    AC_MSG_RESULT($ipv6_cv_dir)
    if test $ipv6_cv_dir = no; then
      ac_cv_lib_inet6_$1=no
    else
      if test x$ipv6_libinet6 = x; then
	ipv6_libinet6=no
	SAVELDFLAGS="$LDFLAGS"
	LDFLAGS="$LDFLAGS -L$ipv6_cv_dir/lib"
      fi
      AC_CHECK_LIB(inet6, $1, [dnl
	if test $ipv6_libinet6 = no; then
	  ipv6_libinet6=yes
	  LIBS="$LIBS -linet6"
	fi],)dnl
      if test $ipv6_libinet6 = no; then
	LDFLAGS="$SAVELDFLAGS"
      fi
    fi])dnl
])dnl
ipv6_cv_$1=no
if test $ac_cv_func_$1 = yes -o $ac_cv_lib_socket_$1 = yes \
     -o $ac_cv_lib_inet6_$1 = yes
then
  ipv6_cv_$1=yes
fi
if test $ipv6_cv_$1 = no; then
  if test $1 = getaddrinfo; then
    for ipv6_cv_pfx in o n; do
      AC_EGREP_HEADER(${ipv6_cv_pfx}$1, netdb.h,
		      [AC_CHECK_FUNC(${ipv6_cv_pfx}$1)])
      if eval test X\$ac_cv_func_${ipv6_cv_pfx}$1 = Xyes; then
	ipv6_cv_$1=yes
	break
      fi
    done
  fi
fi
if test $ipv6_cv_$1 = yes; then
  AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$1))
  ifelse([$2], , :, [$2])
else
  ifelse([$3], , :, [$3])
fi])
dnl
dnl See whether sys/socket.h has socklen_t
AC_DEFUN([IPv6_CHECK_SOCKLEN_T], [
AC_MSG_CHECKING(for socklen_t)
AC_CACHE_VAL(ipv6_cv_socklen_t, [dnl
AC_TRY_LINK([#include <sys/types.h>
#include <sys/socket.h>],
	    [socklen_t len = 0;],
	    [ipv6_cv_socklen_t=yes], [ipv6_cv_socklen_t=no])])dnl
if test $ipv6_cv_socklen_t = yes; then
  ifelse([$1], , AC_DEFINE(HAVE_SOCKLEN_T,[1],[Do we have a socklen_t?]), [$1])
else
  ifelse([$2], , :, [$2])
fi
AC_MSG_RESULT($ipv6_cv_socklen_t)])
dnl
dnl Check if darwin inet_ntop is broken
AC_DEFUN([IPv6_CHECK_INET_NTOP], [
AC_MSG_CHECKING(for working inet_ntop)
AC_CACHE_VAL(ipv6_cv_can_inet_ntop, [dnl
AC_RUN_IFELSE([AC_LANG_SOURCE[
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int
main() {
  static struct in6_addr addr;
  static char str[INET6_ADDRSTRLEN];

  addr.s6_addr[15] = 0x21;
  inet_ntop(AF_INET6, &addr, str, sizeof(str));
  if (strcmp(str, "::21") && strcmp(str, "::0.0.0.33"))
    exit(1);
}
]], [ipv6_cv_can_inet_ntop=yes], [ipv6_cv_can_inet_ntop=no])])dnl