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<TITLE>Option: vcg</TITLE>
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<H2>Option: <font color=#FF0080>vcg</font></H2><P>
<A NAME="vcg"></A><DT><B><A HREF="vcg.html">-vcg</A></B> </DT>
<DD>Produce the call graph in the form of a VCG
graph description. This description is written to a separate file, with
the same stem as the file containing the main program, and suffix <I>.vcg</I>.
This file is able to be given directly to <B><A HREF="/cgi-bin/man2html?xvcg&1L">xvcg</B>(1L)</A>
to visualize the call
graph. (If input is from the standard input, then the graph description
is sent to standard output.) This switch is equivalent to <B><A HREF="calltree.html">-calltree</A>=vcg
</B>. Default = no. <blockquote></DD>
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The VCG description as created is more complex than it
need be. VCG allows graphs and nested subgraphs: each subroutine is created
as a subgraph nested inside its calling routines. This allows you to interactively
display subgraphs or summarise them. <P>
The <B><A HREF="vcg.html">-vcg</A></B> option for <B>ftnchek</B> was written
by Dr. Philip Rubini (p.rubini@cranfield.ac.uk). <P>
<B>xvcg </B> is a graph visualisation
tool which runs under the X windows system. It is freely available from
ftp.cs.uni-sb.de. It was written by G. Sander of the University of Saarland,
Germany. <P>
See also: <B><A HREF="calltree.html">-calltree</A> </B>, <B><A HREF="crossref.html">-crossref</A> </B>, <B><A HREF="reference.html">-reference</A> </B>, <B><A HREF="sort.html">-sort</A> </B>. </blockquote>
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