dnl Process this file with autoconf to produce a configure script.
AC_INIT(lnx2bsd.h)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET

dnl Checks for libraries.
AC_CHECK_LIB(socket,gethostbyaddr)
AC_CHECK_LIB(xnet,gethostbyaddr)

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(stdio.h signal.h string.h netdb.h netinet/in.h arpa/inet.h fcntl.h sys/time.h sys/types.h sys/socket.h)

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

dnl Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(gethostbyaddr)

echo 'checking for tcpdump program in the most known common places...'

if test -f '/bin/tcpdump' || test -f '/sbin/tcpdump' || test -f '/usr/bin/tcpdump' || test -f '/usr/sbin/tcpdump' || test -f '/usr/local/sbin/tcpdump' || test -f '/usr/local/bin/tcpdump' || test -f '/etc/tcpdump'; then
		echo 'tcpdump... found!!'
		AC_OUTPUT(Makefile)
	else
		echo 'tcpdump not found...'
		echo 'install tcpdump first, this program cannot run without tcpdump.'
		echo 'fatal error!!' 
fi