dnl Process this file with autoconf to produce a configure script.
AC_INIT(main.c)
AC_REVISION($Revision: 1.01 $)dnl
AC_CONFIG_HEADER(autoconf.h)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL

dnl System type for low_latency stuff
AC_CANONICAL_HOST
case "$host" in
	i?86-*-*)
		host_x86="yes"
		;;
esac

dnl Checks for libraries.

dnl Checks for *required* header files.
AC_HEADER_STDC
AC_CHECK_HEADERS( \
	stdio.h \
	unistd.h \
	errno.h \
	fcntl.h \
	ctype.h \
	stdarg.h \
	signal.h \
	sys/types.h \
	sys/stat.h \
	sys/time.h \
	, ,AC_MSG_ERROR(Required header file missing.  \
	Either install the header or submit a workaround \
	patch to 'jeff@apex.net'))

dnl Checks for optional header files.
AC_CHECK_HEADERS(termios.h, have_termios="yes")
AC_CHECK_HEADERS(termio.h, have_termio="yes") 
AC_CHECK_HEADERS(linux/serial.h,have_linuxh="yes",)

if test "x$have_linuxh" = "xyes" ; then
	if test "x$host_x86" = "xyes" ; then
		AC_MSG_CHECKING(for low_latency serial option)
		AC_TRY_COMPILE([#include <linux/serial.h>], \
			[int a = ASYNC_LOW_LATENCY;], \
			low_latency=yes,low_latency=no)
		if test "x$low_latency" = "xyes" ; then
			AC_MSG_RESULT(yes)
			AC_DEFINE(HAVE_LOW_LATENCY)
		else
			AC_MSG_RESULT(no)
		fi
	fi
fi

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

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_CHECK_FUNCS( \
	gettimeofday \
	select \
	strdup \
	strerror \
	strstr \
	sigaction \
	snprintf \
	tcgetattr \
	tcsetattr \
	cfsetispeed \
	cfsetospeed \
	, ,AC_MSG_ERROR(Required function missing.  \
	Either install the proper libs or submit a workaround \
	patch to 'jeff@apex.net'))

if test "x$have_termio" = "xyes"; then
	AC_MSG_CHECKING(for CRTSCTS option)
	AC_TRY_COMPILE([#include <termio.h>], \
		[int a = CRTSCTS;], \
		crtscts=yes,crtscts=no)
	if test "x$crtscts" = "xyes"; then
		AC_DEFINE(HAVE_CRTSCTS)
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(no)
	fi
	
	AC_MSG_CHECKING(for NEW_RTSCTS option)
	AC_TRY_COMPILE([#include <termio.h>], \
		[int a = CNEW_RTSCTS;], \
		newrtscts=yes,newrtscts=no)
	if test "x$newrtscts" = "xyes"; then
		AC_DEFINE(HAVE_NEWRTSCTS)
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(no)
	fi
else
	AC_MSG_CHECKING(for CRTSCTS option)
	AC_TRY_COMPILE([#include <termios.h>], \
		[int a = CRTSCTS;], \
		crtscts=yes,crtscts=no)
	if test "x$crtscts" = "xyes"; then
		AC_DEFINE(HAVE_CRTSCTS)
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(no)
	fi
	
	AC_MSG_CHECKING(for NEW_RTSCTS option)
	AC_TRY_COMPILE([#include <termios.h>], \
		[int a = CNEW_RTSCTS;], \
		newrtscts=yes,newrtscts=no)
	if test "x$newrtscts" = "xyes"; then
		AC_DEFINE(HAVE_NEWRTSCTS)
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(no)
	fi
fi

AC_OUTPUT(Makefile)
AC_OUTPUT_COMMANDS([echo  ])
AC_OUTPUT_COMMANDS([echo  Note:  Use GNU make to compile])
AC_OUTPUT_COMMANDS([echo  ])