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<HTML>
<HEAD>
<TITLE>Option: vcg</TITLE>
</HEAD>
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<A HREF="toc.html">Table of Contents</A><P>
<P>Previous: <A HREF="usage.html">-usage</A><HR><P>
<H2>Option: <font color=#FF0080>vcg</font></H2><P>
<A NAME="vcg"></A><DT><B><A HREF="vcg.html">-vcg</A></B>
<DD>
<DL COMPACT><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="http://localhost/cgi-bin/man/man2html?1L+xvcg">xvcg</A></B>(1L)
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.
<P>
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 (<A HREF="mailto:p.rubini@cranfield.ac.uk">p.rubini@cranfield.ac.uk</A>).
<P>
<B>xvcg</B> is a graph visualisation tool which runs under the X windows system.
It is freely available from <A HREF="ftp://ftp.cs.uni-sb.de">ftp.cs.uni-sb.de</A>. 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>.
</DL>
<P>
<P><HR><P>Next: <A HREF="version.html">-version</A>
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