ildInfo.om : File
            /home/jyh/.../omake/tests/simple/BuildInfo.om : File&gt;
    osh&gt; DIRS = $(dirof $(FILES))
    - : &lt;array
            /home/jyh/.../omake/doc/html : Dir
            /home/jyh/.../omake/src : Dir
            /home/jyh/.../omake/tests/simple : Dir&gt;
</PRE><P>In this example, there are three <CODE>BuildInfo.om</CODE> files, in the <CODE>doc/html</CODE>, <CODE>src</CODE>, and
<CODE>tests/simple</CODE> directories. The <CODE>dirof</CODE> function returns the directories for 