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

AC_CONFIG_HEADER(config.h)

AC_PREFIX_DEFAULT(/usr)

dnl Checks for programs.
AC_PROG_CC

dnl Checks for libraries.

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(fcntl.h sys/ioctl.h sys/time.h syslog.h unistd.h netinet/if_ether.h getopt.h sys/uio.h sys/param.h fcntl.h net/bpf.h netpacket/packet.h net/ethernet.h asm/types.h linux/if_packet.h linux/if_ether.h sys/socket.h sys/cdefs.h net/if.h net/if_dl.h net/if_ether.h net/if_types.h netinet/if_ether.h net/if_types.h net/if_dl.h sys/dlpi.h )

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

dnl Check for sockaddr_ll
echo -n "checking for struct sockaddr_ll... "
AC_TRY_COMPILE([#include <asm/types.h>
#include <linux/if_packet.h>
#include <linux/if_ether.h>
], [struct sockaddr_ll sa;],
ac_cv_struct_sockaddr_ll=yes, ac_cv_struct_sockaddr_ll=no)
echo $ac_cv_struct_sockaddr_ll
if test "$ac_cv_struct_sockaddr_ll" = yes ; then
AC_DEFINE(HAVE_STRUCT_SOCKADDR_LL)
fi

dnl Check for N_HDLC line discipline
echo -n "checking for N_HDLC line discipline... "
AC_TRY_COMPILE([#include <linux/termios.h>],
	[int x = N_HDLC;],
	ac_cv_n_hdlc=yes, ac_cv_n_hdlc=no)
echo $ac_cv_n_hdlc
if test "$ac_cv_n_hdlc" = yes ; then
AC_DEFINE(HAVE_N_HDLC)
fi

dnl Checks for library functions.
AC_FUNC_MEMCMP
AC_FUNC_SETVBUF_REVERSED
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(select socket strerror strtol)
AC_PROG_INSTALL

dnl Integer sizes
AC_CHECK_SIZEOF(unsigned short)
AC_CHECK_SIZEOF(unsigned int)
AC_CHECK_SIZEOF(unsigned long)

dnl Check for location of pppd
AC_PATH_PROG(PPPD, pppd, NOTFOUND, $PATH:/sbin:/usr/sbin:/usr/local/sbin)

dnl Check for setsid (probably Linux-specific)
AC_PATH_PROG(SETSID, setsid, "", $PATH:/sbin:/usr/sbin:/usr/local/sbin)

dnl GCC warning level
if test "$GCC" = yes; then
	CFLAGS="$CFLAGS -Wall -Wstrict-prototypes -ansi -pedantic"
fi

dnl If we couldn't find pppd, die
if test "$PPPD" = "NOTFOUND"; then
	echo ""
	echo "*** Oops!  I couldn't find pppd, the PPP daemon anywhere."
	echo "*** You must install pppd, version 2.3.10 or later."
	echo ""
	exit 1
fi

dnl Figure out pppd version.  2.3.7 to 2.3.9 -- issue warning.  Less than
dnl 2.3.7 -- stop

PPPD_VERSION=`$PPPD --version 2>&1 | awk '{print $NF}'`

case "$PPPD_VERSION" in
1.*|2.0.*|2.1.*|2.2.*|2.3.0|2.3.1|2.3.2|2.3.3|2.3.4|2.3.5|2.3.6)
	echo ""
	echo "*** Oops! Your version of pppd is $PPPD_VERSION, which is too old."
	echo "*** You need at least 2.3.7 (2.3.10 or newer recommended.)"
	echo ""
	exit 1
	;;

2.3.7|2.3.8|2.3.9)
	echo ""
	echo "*** Warning.  Your version of pppd is $PPPD_VERSION.  You will"
	echo "*** not be able to use connect-on-demand.  Upgrade to pppd"
	echo "*** 2.3.10 or newer if you need connect-on-demand."
	echo ""
	;;

2*|3*|4*|5*|6*|7*|8*|9*)
	;;

*)
	echo ""
	echo "*** Oops.  I cannot figure out what version of pppd you have."
	echo "*** All I got back was '$PPPD_VERSION'"
	echo ""
	exit 1
	;;
esac

AC_OUTPUT(Makefile adsl-connect adsl-start adsl-stop adsl-init adsl-init-suse adsl-setup)

echo ""
echo "Type 'make' to compile the software."