dnl @synopsis AX_PROG_ANT([required-version])
dnl calls ant -version and parses the version string that is
dnl     printed.
dnl MTH fixed sed command from:
dnl     sed -e "s/[[^0-9.]]*//g"
dnl (which was returning version and compile date) to:
dnl     sed "s/^[[^0-9.]]*\([[0-9.]]*\)[[^0-9.]].*/\1/"
dnl @category Java
dnl @author Kevin Fowler kfowler@sdsc.edu
dnl @author Mark Holder mholder@scs.fsu.edu
dnl @version 2006-04-26
AC_DEFUN([AX_PROG_ANT],[
	AC_CHECK_PROG([ANT], ant, ant, no)
	AC_SUBST([ANT])
	if test "$ANT" = no; then
		AC_MSG_ERROR([ant is not found])
	fi
	
	ant_version=`ant -version | sed "s/^[[^0-9.]]*\([[0-9.]]*\)[[^0-9.]].*/\1/"`
	AC_MSG_CHECKING(for ant ($ant_version) >= $1)
	VERSION_CHECK=`expr $ant_version \>\= $1`
	if test "$VERSION_CHECK" = "1" ; then
		AC_MSG_RESULT(yes)
	else
		AC_MSG_ERROR($ANT is too old)
	fi
	AC_PROVIDE([$0])
])