dnl Process this file with autoconf to produce a configure script.
AC_INIT
AC_CONFIG_SRCDIR([dhcp6c.c])

dnl Checks for programs.
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CPP
AC_PROG_YACC
AC_PROG_LEX

dnl Checks for libraries.
dnl AC_CHECK_LIB(c, kvm_open, [], [AC_CHECK_LIB(kvm, kvm_open)])
dnl AC_CHECK_LIB(mld, nlist)
AC_CHECK_LIB(crypto, MD5_Init, [], [AC_CHECK_LIB(ssl, MD5_Init)])
AC_CHECK_LIB(resolv, __dn_comp, [], [])
dnl pcap library
dnl CFLAGS="-I. $CFLAGS"
dnl AC_MSG_CHECKING(for pcap library/header)
dnl for dir in /usr/local/libpcap /usr/local/v6 /usr/local \
dnl 		../libpcap* ../../libpcap*; do
dnl 	ac_cv_pcap_lib=no
dnl 	ac_cv_pcap_include=no
dnl 	if test -d $dir -a -f $dir/libpcap.a; then
dnl 		ac_cv_pcap_lib="$dir"
dnl 	elif test -d $dir/lib -a -f $dir/lib/libpcap.a; then
dnl 		ac_cv_pcap_lib="$dir/lib"
dnl 	fi
dnl 	if test -d $dir -a -f $dir/pcap.h; then
dnl 		ac_cv_pcap_include="$dir"
dnl 	elif test -d $dir/include -a -f $dir/include/pcap.h; then
dnl 		ac_cv_pcap_include="$dir/include"
dnl 	fi
dnl 	if test "$ac_cv_pcap_lib" != "no" -a "$ac_cv_pcap_include" != "no"; then
dnl 		LIBS="-L$ac_cv_pcap_lib $LIBS"
dnl 		CFLAGS="-I$ac_cv_pcap_include $CFLAGS"
dnl 		break
dnl 	fi
dnl done
dnl if test "$ac_cv_pcap_lib" = "no" -a "$ac_cv_pcap_include" = "no"; then
dnl 	AC_MSG_RESULT(no)
dnl else
dnl 	AC_MSG_RESULT($ac_cv_pcap_lib and $ac_cv_pcap_include)
dnl fi
dnl AC_CHECK_LIB(pcap, pcap_lookupdev, [],
dnl 	[echo "Fatal: libpcap.a not found"
dnl 	exit 1])
dnl AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <pcap.h>]], [[]])],[],[dnl
dnl 	echo "Fatal: pcap.h not found"
dnl 	exit 1])

CFLAGS="$CFLAGS -I\$(srcdir)"

AC_MSG_CHECKING(for getaddrinfo/getnameinfo library)
AC_EGREP_CPP(yes,
[#include <netinet/in.h>
#ifdef __KAME__
 yes
#endif], [result=kame])
AC_MSG_RESULT($result)
case $result in
kame)	AC_DEFINE(INET6)
	o_LIBS="$LIBS"
	LIBS="$LIBS -L/usr/local/v6/lib -L/usr/lib"
	AC_CHECK_LIB(inet6, getaddrinfo, [], [LIBS="$o_LIBS"])
	;;
*)	;;
esac

AC_REPLACE_FUNCS(getaddrinfo)
AC_REPLACE_FUNCS(getnameinfo)
AC_REPLACE_FUNCS(ifaddrs)
AC_CHECK_FUNCS(if_nametoindex)

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h sys/ioctl.h sys/time.h syslog.h unistd.h ifaddrs.h)
AC_MSG_CHECKING(for socklen_t)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
#include <sys/socket.h>]], [[socklen_t x;  x = 1; return x;]])],[AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)
	AC_CHECK_TYPE(socklen_t, int)])

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM
AC_STRUCT_TIMEZONE

dnl Checks for library functions.
AC_FUNC_GETPGRP
AC_PROG_GCC_TRADITIONAL
AC_FUNC_SETPGRP
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(mktime select socket)

dnl Checks for arc4random
dnl AC_REPLACE_FUNCS(arc4random)

dnl Checks for optinal parameters
AC_MSG_CHECKING(if --enable-mediator option is specified)
AC_ARG_WITH(mediator, [  --with-mediator         build with mediator (obsolete)],
	[AC_DEFINE(MEDIATOR)
	with_mediator=yes], [with_mediator=no])
AC_MSG_RESULT($with_mediator);

AC_MSG_CHECKING(if --enable-pedant option is specified)
AC_ARG_ENABLE(pedant, [  --enable-pedant         pedantic compilation],
	[if test "$enableval" = "yes"; then
		CFLAGS="-Wall -Werror $CFLAGS"
	fi], [enableval=no])
AC_MSG_RESULT($enableval);

dnl Checks predeclared identifers of function names
AC_MSG_CHECKING(ANSI predeclared __func__)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[void func(void) {printf("%s\n", __func__);}]])],[AC_MSG_RESULT(yes)
	 pred_func_id=ansi],[AC_MSG_RESULT(no)
	 pred_func_id=no])
if test $pred_func_id = no; then
AC_MSG_CHECKING(gcc predelcared __FUNCTION__)
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[void func(void) {printf("%s\n", __FUNCTION__);}]])],[AC_MSG_RESULT(yes)
		 pred_func_id=gcc],[AC_MSG_RESULT(no)
		 pred_func_id=no])
fi
case $pred_func_id in
	ansi)
		AC_DEFINE(HAVE_ANSI_FUNC)
		;;
	gcc)
		AC_DEFINE(HAVE_GCC_FUNCTION)
		;;
esac

AC_CHECK_HEADERS(stdarg.h)

AC_CONFIG_FILES([Makefile])
AC_OUTPUT