$(PREFIXED_INCLUDES) $(CAT_FLAGS) -c $&lt;
</PRE><P>The final part is the build rule itself, where we call the <CODE>catc</CODE> compiler with the include
path, and the <CODE>CAT_FLAGS</CODE> that have been defined. The <CODE>$&lt;</CODE> variable represents the source
file.</P><H3 CLASS="subsection"><A NAME="htoc21">3.4.2</A>&#XA0;&#XA0;Defining a rule for linking</H3><P>For linking, we&#X2019;ll define another rule describing how to perform linking. Instead of defining an
implicit rule, we&#X2019;ll defin