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_PATH_PROG([ANT], [ant], [no], [${PATH}:$ANT_HOME/bin])
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 $1 =< ($ant_version))
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_MSG_CHECKING(for if ant can fork)
ANT_FORK_TEST="ant-fork-test.xml"
cat << \EOF > $ANT_FORK_TEST
<project name="test-fork-project" default="test-fork">
	<target name="test-fork">
		<exec executable="true"  vmlauncher="false" failonerror="true" />
	</target>
</project>
EOF
if AC_TRY_COMMAND($ANT $ANT_ARGS -f $ANT_FORK_TEST) >/dev/null 2>&1 ; then
	ac_ant_fork_works=yes
else
	if test "x$ANT_HOME" = "x" ; then
		ac_ant_parent=`AS_DIRNAME("$ANT")`
		ANT_HOME=`AS_DIRNAME("$ac_ant_parent")`
	fi
	ANT_ARGS="-Dant.home=$ANT_HOME"
	if AC_TRY_COMMAND($ANT $ANT_ARGS -f $ANT_FORK_TEST) >/dev/null 2>&1; then
		ac_ant_fork_works=yes
	else
		AC_MSG_ERROR([$ANT cannot exec external commands outside of Java.  Make sure that ANT_HOME is set and \$ANT_HOME/bin/antRun exists.])
	fi
fi
if test $ac_ant_fork_works = "yes" ; then
	AC_MSG_RESULT(yes)
fi

rm -f $ANT_FORK_TEST

AC_SUBST([ANT_ARGS])

])

AC_PROVIDE([$0])
])