configure.in

IPv6环境下的DHCP实现

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

dnl Checks for programs.
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CPP

dnl Checks for libraries.
dnl AC_CHECK_LIB(c, kvm_open, [], [AC_CHECK_LIB(kvm, kvm_open)])
dnl AC_CHECK_LIB(mld, nlist)

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_TRY_COMPILE([#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="$LIBS -L/usr/local/v6/lib"
	AC_CHECK_LIB(inet6, getaddrinfo, [], [LIBS="$o_LIBS"])
	;;
*)	;;
esac

AC_REPLACE_FUNCS(getaddrinfo)
AC_REPLACE_FUNCS(getnameinfo)
AC_CHECK_FUNC(getifaddrs, AC_DEFINE(HAVE_GETIFADDRS), [dnl
	echo FATAL: getifaddrs is required
	exit 1])
AC_CHECK_FUNCS(if_nametoindex)
AC_REPLACE_FUNCS(strlcpy strlcat)

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_TRY_COMPILE([#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
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],
	[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_TRY_COMPILE([],
[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_TRY_COMPILE([],
	[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

dnl DHCP option type values not officially defined
AC_MSG_CHECKING(for DHCP DNS option)
AC_ARG_WITH(opt-dns,
[  --with-opt-dns=VALUE Specify DHCP option value for DNS],
    dhcpopt_dns="$withval", dhcpopt_dns=0)
if test $dhcpopt_dns = 0 ; then
	dhcpopt_dns=25
	AC_MSG_RESULT(unspecified and using $dhcpopt_dns)
else
	AC_MSG_RESULT(using $dhcpopt_dns)
fi
AC_SUBST(dhcpopt_dns)

AC_MSG_CHECKING(for DHCP prefix delegation option)
AC_ARG_WITH(opt-pdel,
[  --with-opt-pdel=VALUE Specify DHCP option value for prefix delegation],
    dhcpopt_pdel="$withval", dhcpopt_pdel=0)
if test $dhcpopt_pdel = 0 ; then
	dhcpopt_pdel=30
	AC_MSG_RESULT(unspecified and using $dhcpopt_pdel)
else
	AC_MSG_RESULT(using $dhcpopt_pdel)
fi
AC_SUBST(dhcpopt_pdel)

AC_MSG_CHECKING(for DHCP prefix information option)
AC_ARG_WITH(opt-pinfo,
[  --with-opt-pinfo=VALUE Specify DHCP option value for prefix information],
    dhcpopt_pinfo="$withval", dhcpopt_pinfo=0)
if test $dhcpopt_pinfo = 0 ; then
	dhcpopt_pinfo=31
	AC_MSG_RESULT(unspecified and using $dhcpopt_pinfo)
else
	AC_MSG_RESULT(using $dhcpopt_pinfo)
fi
AC_SUBST(dhcpopt_pinfo)

AC_MSG_CHECKING(for DHCP prefix request option)
AC_ARG_WITH(opt-preq,
[  --with-opt-preq=VALUE Specify DHCP option value for prefix request],
    dhcpopt_preq="$withval", dhcpopt_preq=0)
if test $dhcpopt_preq = 0 ; then
	dhcpopt_preq=32
	AC_MSG_RESULT(unspecified and using $dhcpopt_preq)
else
	AC_MSG_RESULT(using $dhcpopt_preq)
fi
AC_SUBST(dhcpopt_preq)

AC_CHECK_HEADERS(stdarg.h)

AC_OUTPUT(Makefile)