<target name="checksw_path" depends="if_windows, if_unix"/>

<target name="checkos">
	<condition property="isWindows">
		<os family="windows" />
	</condition>

	<condition property="isLinux">
		<os family="unix" />
	</condition>
</target>

<target name="if_windows" depends="checkos" if="isWindows">
   <property name="sw.root" value="c:flag" />
	<echo message="${sw.root}"/>
</target>

<target name="if_unix" depends="checkos" if="isLinux">
	<property name="sw.root" value="/opt/flag" />
	<echo message="${sw.root}"/>
</target>

<condition property="isWindows">
                    <os family="windows" />
 </condition>

 <condition property="isLinux">
                    <os family="unix" />
 </condition>

<target name="checkos">
    <condition property="isWindows" value="true">
            <os family="windows" />
    </condition>

    <condition property="isLinux" value="true">
            <os family="unix" />
    </condition>
</target>