Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!unixhub!slacvm!wbj
From: WBJ@SLACVM.SLAC.STANFORD.EDU (Bill Johnson)
Newsgroups: comp.lang.fortran
Subject: Re: Cross List Software?
Message-ID: <90306.100728WBJ@SLACVM.SLAC.STANFORD.EDU>
Date: 2 Nov 90 18:07:28 GMT
References: <90305.161411FC138001@ysub.ysu.edu>
Organization: Stanford Linear Accelerator Center
Lines: 14

IBM offers a facility called ICA (InterCompilation Analysis) as
a part of VS FORTRAN, Release 2 which does exactly this among other
things.  It allows you to generate and update a database for an entire
application from which one can extract a global report about who-calls-
what, what-calls-who, what routines reference which COMMONs, what
inconsistencies there are in calling sequences (e.g., wrong number
of arguments, wrong type, etc.), and even instances of potential
disaster like passing a FORTRAN constant (e.g. the number 1) as an
argument which is then changed by the subroutine which has been called.

Although these global reports are a little noisy, they really do harvest
the information the compiler "knows" about an application as a totality
in a fairly useful way.  It is especially useful for understanding
large applications which have been written by somebody else.